Yarn monitoring device.

专利摘要:
A yarn monitoring device (6) comprises a sensing section (70) and an upstream yarn guide (64). The detection section (70) detects a state of a yarn (21) in a transit space of the yarn (68) through which the yarn (21) flows. The upstream yarn guide (64) is arranged upstream in a transit direction of the yarn of the sensing section (70), and is adapted to regulate the path of the yarn, which is a transit position of the yarn (21) in the yarn. yarn transit space (68). The yarn monitoring device (6) is equipped with a first emission port (71) adapted to blow compressed air which acts as a fluid in a region comprising at least one upstream yarn guide (64). The first emission port (71) comprises a portion disposed downstream in the transit direction of the yarn of the upstream yarn guide (64).
公开号:CH712132A2
申请号:CH00144/17
申请日:2017-02-08
公开日:2017-08-15
发明作者:Yasuda Koji；Nakade Kazuhiko
申请人:Murata Machinery Ltd；
IPC主号:

专利说明:

Description
INTRODUCTION TO THE INVENTION 1. Field of the invention The present invention relates to a monitoring device for a yarn suitable for monitoring a state of a yarn in transit. In particular, the present invention relates to a configuration for sweeping away the fiber waste in the monitoring device of a yarn. 2. Description of the prior art [0002] Conventionally, a device for monitoring a yarn having a configuration for emitting compressed air in a transit space of a yarn, through which the yarn slides, is used to sweep away the waste of fibers in the yarn transit space. This type of yarn monitoring device is disclosed in the unexamined Japanese patent publication n. 2013-230 908.
[0003] The yarn monitoring device of the unexamined Japanese patent publication n. 2013-230 908 is provided with a passage of yarn realized in the shape of a groove along a path of transit of the yarn. The yarn monitoring device also includes a detection section suitable for detecting a state (presence / absence of a yarn defect etc.) of the yarn in the transit space through which the yarn flows. A yarn path guide is located upstream in a yarn transit direction of the sensing section to adjust a yarn transit position in the yarn transit space. The monitoring device of a yarn also comprises an emission section, and the compressed air is emitted from the emission section towards the detection section and in the vicinity of the same.
[0004] More specifically, the passage of the yarn has a group of side wall surfaces arranged in parallel with each other with the path of transit of the yarn between them, in which the compressed air is emitted in a diagonal direction from the emission section towards one of the group of side wall surfaces in such a way that an air flow also acts on the other side wall surface and the like, thereby preventing the fiber waste from remaining in the passage of the yarn.
BRIEF SUMMARY OF THE INVENTION
[0005] However, it has been found that in the unexamined Japanese patent publication n. 2013-230 908, the yarn path guide is arranged in a position recessed in the yarn transit space, and therefore it may be difficult for the flow of compressed air to be emitted diagonally from the emission section to reach an area close to the yarn path guide. In this case, the fiber waste could remain near the yarn path guide. Therefore, it is desirable to develop a configuration capable of sweeping away the fiber waste more effectively.
[0006] The present invention has been carried out in consideration of the above circumstances, and one of its aims is to effectively wipe away the fiber waste in the vicinity of an upstream yarn regulating element arranged upstream in the transit direction of the yarn of the detection section in the yarn monitoring device.
[0007] The problems which the present invention intends to solve are described above and the means and effects capable of solving these problems will now be described.
[0008] According to an aspect of the present invention, a monitoring device is provided for a yarn having the following configuration. Specifically, the yarn monitoring device comprises a sensing section and an upstream yarn path regulating element. The detection section is adapted to detect a state of a yarn in a transit space of the yarn through which the yarn slides. The upstream yarn path regulating element is arranged upstream in a yarn transit direction of the sensing section and is adapted to adjust a yarn path, which is a yarn transit position in the yarn transit space. The yarn monitoring device is equipped with a first emission port adapted to emit a fluid in a region comprising at least the upstream yarn path regulating element. The first emission port comprises a portion disposed downstream in the direction of transit of the yarn of the upstream yarn regulating element.
[0009] Therefore, since the first emission port comprises the portion disposed downstream in the transit direction of the yarn of the upstream yarn path regulating element, a flow of fluid is formed in the proximity of the downstream position in the transit direction of the yarn of the upstream yarn path regulator element. Consequently, the fluid emitted by the first emission port uniformly reaches the portion near the upstream yarn regulating element. Therefore, the fiber waste near the upstream yarn path regulating element can be effectively wiped off by the fluid emitted by the first emission port. As a result, it is possible to prevent the fiber waste in the vicinity of the upstream yarn path regulating element from entering a detection region, in particular in the transit space of the yarn with the yarn in transit, and remains in the detection region .
[0010] In embodiments of the yarn monitoring device described above, the downstream position in the yarn transit direction coincides with an upper side vertically. In the present, the upper side vertically is not limited only to a completely vertical top side, but an inclined direction is allowed with a slight angle with respect to the vertical direction. This means that it is simply necessary for the downstream position in the yarn transit direction to have at least one vertical component upwards.
[0011] Therefore, even if the fiber waste is deposited on the upper side (that is, downstream in the direction of transit of the yarn) of the upstream yarn regulating element due to its own weight, such waste fibers can be swept away and removed from the fluid emitted by the first emission light. It is possible to prevent the fiber waste deposited on the upstream yarn path regulating element from entering the detection region with the yarn and to remain in the detection region.
[0012] In embodiments of the yarn monitoring device described above, the first emission port is made with an elongated shape in the yarn transit direction.
[0013] Therefore, the fluid can be emitted strongly from the first emission port through a relatively wide field along the transit direction of the yarn, so that the fiber waste in the vicinity of the yarn path regulating element a upstream can be effectively wiped out.
[0014] In embodiments, preferably the yarn monitoring device described above has the following configuration. Specifically, the yarn monitoring device further comprises a downstream yarn path regulating element. The downstream yarn path regulating element is arranged downstream in the direction of transit of the yarn of the detection section and is adapted to adjust the path of the yarn. A part of the direction of emission of the fluid emitted by the first emission port is inclined with respect to the yarn path defined by the upstream yarn path regulating element and by the downstream yarn path regulating element so as to approach the position downstream in the direction of transit of the yarn with an increasing distance from the first emission port.
[0015] Therefore, the fiber waste is swept away so as to move away from the area in proximity of the yarn path regulating element upstream towards the position downstream of the yarn path, so that it is possible to prevent the waste of fibers already swept away, you return to the transit space of the yarn with the yarn in transit.
[0016] In embodiments of the yarn monitoring device described above, a part of the direction of emission of the fluid emitted by the first emission port is formed so as to be a direction towards the sensing section.
[0017] Therefore, not only the area near the upstream yarn path regulating element but also the detection section can be cleaned simultaneously by the fluid emitted by the first emission port.
[0018] In embodiments, the yarn monitoring device described above has the following configuration. Specifically, the yarn transit space is formed with three sides surrounded by a pair of side walls and a rear wall. A direction of emission of the fluid emitted by the first emission port towards the sensing section is formed so as to be a direction in which the fluid released enters the yarn transit space from an open side of the yarn transit space, and is issued against one of the pair of side walls.
[0019] Therefore, the fluid emitted by the first emission port towards the sensing section enters the yarn transit space from the open side and is blown against one of the pair of side walls, whereby the flow of fluid which performs a whirling motion in the yarn transit space and, consequently, the fluid is also emitted against the rear wall and the other side wall. Therefore, the interior of the transit space can be cleaned over a large region.
[0020] In embodiments, preferably the yarn monitoring device described above has the following configuration. Specifically, the detection section comprises a first sensor section having a light projection section adapted to radiate light towards the yarn, and a light receiving section adapted to receive the light radiated by the light projection section. Looking in a direction along the direction of transit of the yarn, the direction of emission of the fluid emitted by the first emission port towards the sensing section is formed so as to be a direction towards a position which avoids being a light exit surface of the light projection section that an incident surface of the light of the light receiving section in the side walls.
[0021] In other words, if the light exit surface of the light projection section and the incident light surface of the light receiving section become dirty, this may affect the detection section detection result. In this regard, in the present configuration, the fluid is emitted towards the position which avoids both the light exit surface of the light projection section and the incident surface of the light of the light receiving section in the side walls, so that , even if the fluid is dirty, the detection performance of the first sensor section can be kept high.
[0022] In embodiments, the yarn monitoring device described above has the following configuration. Specifically, the detection section also comprises a second sensor section located downstream in the direction of transit of the yarn of the first sensor section. A downstream end in the yarn transit direction of the first emission port is positioned upstream in the yarn transit direction of the second sensor section.
[0023] Therefore, the fluid emitted by the first emission port does not flow in excess towards the second sensor section, so that the fluid emitted by the first emission port can be intensely blown against the region which comprises the regulating element of upstream yarn path, and this region can be effectively cleaned in a concentrated manner.
[0024] In embodiments, preferably the yarn monitoring device described above has the following configuration. Specifically, the yarn monitoring device further comprises a cutting section and a second emission port. The cutting section is arranged upstream in the yarn transit direction of the upstream yarn regulating element and is adapted to cut the yarn that runs through the yarn transit space. The second emission port is designed to blow the fluid towards the cutting section. The second emission port is formed upstream in the transit direction of the yarn of the upstream yarn regulating element.
[0025] Therefore, the cutting section is cleaned of the fluid emitted not by the first emission port but by the second emission port and, consequently, the first emission port can be considered as a dedicated fluid emission port adapted to remove the fiber waste associated with the detection performance of the first sensor section. Therefore, the first emission port may be arranged in a position suitable for sweeping away the fiber waste in the vicinity of the upstream yarn path regulating element, and the first emission port may be made with a shape suitable for sweeping away the fiber waste near the upstream yarn path regulating element. Therefore, each position can be properly cleaned by the fluid emitted by the single emission light.
[0026] In embodiments, the yarn monitoring device described above has the following configuration. Specifically, the yarn transit space is formed with three sides surrounded by a pair of side walls and a rear wall. The direction of emission of the fluid emitted by the second emission port is formed so as to be a direction towards the open side of the yarn transit space.
[0027] Therefore, the fluid is emitted by the second emission port, so that the fiber waste within the yarn transit space can be wiped off outside the yarn transit space.
[0028] In embodiments, the yarn monitoring device described above has the following configuration. Specifically, the yarn monitoring device comprises a downstream yarn path regulating element. The downstream yarn path regulating element is arranged downstream in the direction of transit of the yarn of the detection section, and is adapted to adjust the path of the yarn. In a waiting state in which the yarn is not cut, the cutting section is arranged in a position displaced by the yarn path defined by the upstream yarn path regulating element and by the downstream yarn path regulating element looking at in a direction perpendicular to the rear wall, and the direction of emission of the fluid emitted by the second emission port is formed so as to be a direction towards the cutting section in the waiting state without passing through the path of the yarn.
[0029] The cutting section in the waiting state in which the yarn is not cut can be cleaned by appropriately blowing the fluid emitted by the second emission port. Moreover, the advantage is obtained that the yarn is not made to oscillate even if the fluid emitted by the second emission port is blown against the cutting section during the transit of the yarn.
[0030] In embodiments, the yarn monitoring device described above has the following configuration. Specifically, the yarn monitoring device further comprises a fluid introduction port and a fluid flow path. The fluid is introduced into the fluid introduction port. The fluid flow path guides the fluid introduced by the fluid introducing light towards the first emission port and the second emission port. The fluid flow path comprises an introduction path, a first flow path, a second flow path and an intermediate path. The fluid introduction port is formed at one end of the introduction path. The first emission port is formed at one end of the first flow path. The second emission port is formed at one end of the second flow path. The other end of the introduction path, the other end of the first flow path and the other end of the second flow path are connected to the intermediate path in different positions. The intermediate path extends in a different direction from any one in which the introduction path extends, a direction in which the first flow path extends and a direction in which the second flow path extends. In the intermediate path, the other end of the second flow path is positioned downstream in the direction of flow of the fluid with respect to the other end of the introduction path.
[0031] Therefore, by appropriately setting the diameter, the cross-sectional area and the like of the first emission port, of the second emission port and of each flow path, the fluid introduced by the fluid introduction port can be distributed appropriately to the fluid to be emitted from the first emission port and to the fluid to be emitted from the second emission port. Therefore, an adjustment is made in such a way that each of the amount of fluid flow emitted by the first emission port towards the upstream yarn regulating element and the detection section and the amount of fluid flow emitted by the second light output towards the cutting section becomes an appropriate amount of flow, so that all positions can be cleaned appropriately.
[0032] In embodiments of the yarn monitoring device described above, an opening in which the first flow path is connected to the intermediate path is greater than an opening in which the second flow path is connected to the intermediate path.
Thus, the amount of fluid flow flowing into the first flow path can be made greater than the amount of fluid flow flowing into the second flow path and, moreover, the amount of fluid to be blown into a region which comprises the upstream yarn path regulating element can be made greater than the amount of fluid that must be blown towards the cutting section. Thus, a large amount of fluid is supplied to the region which comprises the upstream yarn path-adjusting element, where it is desirable for the fluid to be emitted over a wider region, while a small amount of fluid is supplied to the cutting section , where it is desirable for the fluid to be emitted in a localized manner, so that the cleaning target can be cleaned effectively without any waste of fluid.
BRIEF DESCRIPTION OF THE DRAWINGS
[0034]
Fig. 1 is a front view illustrating a global configuration of an automatic winder comprising a yarn monitoring device according to an embodiment of the present invention; fig. 2 is a side view of a winding unit comprising the yarn monitoring device; fig. 3 is a perspective view of an external aspect of the monitoring device of a yarn; fig. 4 is a front view of the external appearance of a yarn monitoring device; fig. 5 is a schematic planar cross-sectional view of a first envelope and of the interior thereof; fig. 6 is a schematic plan view of a second envelope and of the interior thereof; fig. 7 is a front view illustrating a configuration of a slot formed in the monitoring device of a yarn and a perimeter thereof; fig. 8 is a plan view of a flow path element disposed in the yarn monitoring device; fig. 9 is a cross-sectional view taken along the line A-A of fig. 8; fig. 10 is a cross-sectional view taken along the line B-B of fig. 8; fig. 11 is a projection illustrating a state in which a compressed air distribution flow path is projected on a virtual perpendicular plane in a yarn transit direction in the yarn monitoring device; and fig. 12 is a projection illustrating a state in which a compressed air distribution flow path is projected on a virtual perpendicular plane in the yarn transit direction in a yarn monitoring device according to an alternative embodiment.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
[0035] Subsequently, an embodiment of the present invention will be described with reference to the drawings.
[0036] As shown in fig. 1, an automatic winder (a yarn winding machine) 1 comprises, as main components, a plurality of winding units (yarn winding units) 10 arranged side by side, and a machine control section 11 arranged in matching one end in a direction in which the winding units 10 are arranged.
[0037] The machine control section 11 comprises a display device 12 capable of displaying information associated with each winding unit 10, an instruction entry section 13 suitable for insertion by an operator of various types of instructions in connection with the control section of machine 11 and the like. The operator of the automatic winder 1 can verify various types of visualizations displayed on the display device 12 and can also appropriately use the input section of instructions 13 to collectively manage the plurality of winding units 10 with the control section of machine 11.
[0038] Each wrapping unit 10 illustrated in figs. 1 and 2 is configured to unwind a yarn 21 from a yarn supply bobbin 20 and rewind the yarn around a winding bobbin 22. The winding bobbin 22 with the yarn 21 wrapped around it is referred to as a bobbin 23. following description, «upstream in the direction of yarn transit» and «downstream in the direction of yarn transit» indicate upstream and downstream respectively, looking in the direction of transit of the yarn 21.
[0039] As shown in fig. 2, the winding unit 10 comprises a main body frame 24, a yarn feeding section 25 and a winding section 26 as main components.
[0040] The main body frame 24 is arranged at one side of the winding unit 10. Most of the components of the winding unit 10 are supported directly or indirectly by the main body frame 24. An operating section 27 suitable for use by the operator is arranged on a front side of the main body frame 24.
[0041] The yarn feeding section 25 is configured to be able to support the yarn supply bobbin 20, adapted to feed the yarn 21, in a vertical state. The winding section 26 comprises a support 28 and a winding cylinder 29.
[0042] The support 28 rotatably supports the winding coil 22. Furthermore, the support 28 is configured to allow a perimeter surface of the support winding coil 22 to come into contact with a perimeter surface of the winding cylinder 29. The cylinder winder 29 is arranged to face the winding coil 22 and is configured to be rotatably operated by a motor (not shown). A translation groove (not shown) having a reciprocal spiral shape to translate the yarn 21 wrapped around the winding bobbin 22 is formed on the outer perimeter surface of the winding cylinder 29.
[0043] The winding coil 22 is rotated by actuating and rotating the winding cylinder 29 with the outer perimetric surface of the winding coil 22 in contact with the winding cylinder 29. Therefore, the yarn 21 unwound from the yarn supplying bobbin 20 can be wound around the winding coil 22 as it is translated by the translation groove. The component capable of translating the yarn 21 is not limited to the winding cylinder 29 and, for example, instead of the winding cylinder 29, it is possible to adopt an arm-shifting device capable of guiding the yarn 21 with a translation guide operated alternately with a predetermined translation width.
Each wrapping unit 10 comprises a unit control section 30. The unit control section 30 is configured with hardware, such as CPU, ROM and RAM, and software, such as a control program stored in RAM. With the cooperation of hardware and software, each component of the winding unit 10 is controlled. The unit control section 30 of each winding unit 10 is configured to be in communication with the machine control section 11. Thus, the operation of each winding unit 10 can be intensively managed by the machine control section. 11.
[0045] The winding unit 10 has a configuration in which an unwinding facilitating device 31, a tension application device 32, a yarn junction device 33 and a yarn monitoring device 6 are arranged in this order from the upstream position in the yarn transit direction on a yarn transit path between the yarn supply section 25 and the winding section 26.
[0046] The unwinding facilitating device 31 comprises a regulating element 35 able to come into contact with a portion (bale) prominent towards the outer side when the yarn 21 unwound from the spool for feeding the yarn 20 is made to oscillate by a centrifugal force. The contact of the regulating element 35 with the bale prevents the yarn 21 from being oscillated in excess and keeps the bale at a predetermined size, thus allowing the unwinding of the yarn 21 from the yarn supply bobbin 20 to be performed with a tension predetermined.
[0047] The tension application device 32 is adapted to apply a predetermined voltage on the yarn in transit 21. The tension application device 32 of the present embodiment can be a comb-type tension application device in which Movable comb are arranged with respect to fixed comb teeth. The tension application device 32 applies an appropriate tension on the yarn 21 by passing the yarn 21 while it is folded between the comb teeth in a engaged state. As a voltage application device 32 it is possible to adopt a voltage application device different from the comb type, for example a disc type tension application device.
[0048] The yarn splicing device 33 is configured to join (yarn splicing operation) a yarn (lower yarn) from the yarn spool 20 and a yarn (upper yarn) from the winding spool 22 when the yarn 21 they are disconnected between the yarn supplying bobbin 20 and the winding bobbin 22, such as when the yarn is cut with a cutting device (cutter) 16, which will be described later. The configuration of the junction device of the yarn 33 is not particularly limited and, for example, a pneumatic splicer can be adopted which twists the ends of the yarn with a swirling air flow generated by compressed air, or a mechanical knotter can be used. similar. An upper yarn suction tube (first yarn capture and guide device) 44 sucks and captures the end of the yarn from the winding bobbin 22 (from the winding section 26) and guides the end of the yarn towards the junction device. of the yarn 33. An inferior yarn suction tube (second yarn capture and guide device) 45 sucks and captures the end of the yarn from the yarn supply bobbin 20 (from the yarn supply section 25) and guides the yarn end of the yarn towards the yarn joining device 33.
[0049] The yarn monitoring device 6 is configured to monitor the status (quality) of the yarn in transit 21 and to detect a yarn defect (portion with an anomaly in the yarn 21) and the like contained in yarn 21. The device for monitoring the yarn 6 comprises the cutting device 16 adapted to cut the yarn 21 when the yarn defect and the like is detected by the yarn monitoring device.
[0050] A brief description will now be given of an operation relating to when the yarn defect and the like is detected by the yarn monitoring device 6 with reference to fig. 2.
[0051] When the yarn defect and the like is detected in the monitoring of the yarn 21, the yarn monitoring device 6 transmits a yarn defect detection signal to the unit control section 30 and also activates the cutting device 16 for cutting the yarn 21. The yarn 21 positioned downstream of the cutting portion is wound once in the cone 23. The yarn 21 wound in the cone 23 in this case includes a yarn defect portion and the like detected by the yarn monitoring device 6 The unit control section 30 also stops the winding of the yarn by the winding section 26.
[0052] The lower yarn suction tube 45 sucks and captures the end of the yarn fed by the yarn supplying bobbin 20 and guides the end of the yarn towards the yarn joining device 33. Before or after this, the upper yarn suction tube 44 sucks and captures the end of the yarn wound in the bobbin 23 and guides the end of the yarn towards the junction device of the yarn 33. In this case, the portion of the yarn defect is similar wound in the bobbin 23 is sucked in and pulled out of the upper yarn suction tube 44.
[0053] The yarn junction device 33 joins the ends of the yarn guided by the upper yarn suction tube 44 and the lower yarn suction tube 45. Therefore, after the portion which includes the yarn defect and the like has been removed, the yarn 21 cut by the cutting device 16 is connected again.
[0054] After the yarn splicing operation has been completed by means of the yarn splicing device 33, the unit control section 30 takes up the winding of the yarn 21 by means of the winding section 26. According to the operations of which above, the yarn and similar defect detected by the yarn monitoring device 6 can be removed, and the winding of the yarn 21 in the cone 23 can be resumed.
[0055] Subsequently, a detailed description will be given relating to a configuration of the monitoring device of the yarn 6 according to the present embodiment, referring to the figs. from 3 to 11.
[0056] As shown in Figs. 3 to 5, the yarn monitoring device 6 of the present embodiment comprises, as main components, a first casing 66, a second casing 67, an upper plate 63, an upstream yarn guide (yarn path regulating element upstream) 64, a downstream yarn guide (downstream yarn path regulating element) 65, a sensing section 70, the cutting device 16 (see Figs. 2 and 6) and a monitoring control section 200.
[0057] The first casing 66 (support section of the detection section) is a casing suitable to at least partially house the detection section 70. For example, the first casing 66 is made of resin. In the present embodiment, the first casing 66 houses the entire detection section 70.
[0058] The detection section 70 is able to detect a state of the yarn 21 in a transit space of the yarn 68 through which the yarn 21 flows. As shown in Figs. 3 and 4, the sensing section 70 comprises a support 69, a first sensor section 51 and a second sensor section 52. The first sensor section 51 and the second sensor section 52 are supported by the support 69 mounted on the first housing 66. The sensing section 70 can also be referred to as a measuring section adapted to measure the state of the yarn 21.
[0059] In the present embodiment, the first sensor section 51 is configured to detect the state of the yarn 21 (thickness of the yarn, presence / absence of a yarn defect and so on) radiating the yarn 21 with light. The first section of sensor 51 comprises a light-emitting element (light projection section) 37 and a light-receiving element (light-receiving section) 38. The light-emitting element 37 is configured, for example, by means of leds and similar. The light receiving element 38 is configured, for example, as a photodiode and is adapted to convert the intensity of the light reflected in an electrical signal and to emit the electrical signal.
[0060] The second sensor section 52 is arranged downstream in the yarn transit direction of the first sensor section 51. The second sensor section 52 of the present embodiment is configured as a so-called optical sensor, similarly to the first sensor section 51.
[0061] The second casing 67 illustrated in figs. 3, 4 and 6 is a casing able to contain the cutting device 16 of the yarn monitoring device 6 for cutting the yarn 21. This means that the second casing 67 houses at least partially the cutting device 16.11 according to casing 67 houses at least partially also a flow path element 90 which will be described later. The flow path element 90 is a plate-shaped element made of metal. For example, the second casing 67 is made of resin.
[0062] The cutting device 16 includes a blade (cutting section) 81 and an actuating mechanism 80 adapted to operate the blade 81. The blade 81 is connected to the drive mechanism 80 as shown in FIG. 6, in which a distal end portion (blade edge 81 a) of the blade 81 can be exposed towards an internal space of a slot 6a which will be described later (in other words, the inside of the transit space of the yarn 68 which will be described later). For example, the actuating mechanism 80 is configured as a solenoid and is able to advance the blade edge 81 a of the blade 81 of the cutting device 16 in the path of the yarn in which the yarn 21 flows, and to retract the edge of blade 81 a with respect to the yarn path by actuating the actuating mechanism 80. In the following description, a state in which the blade 81 is retracted with respect to the yarn path can be referred to as a "waiting state". The flow path element 90 also acts as a plane (blade receiving portion) adapted to receive the blade edge 81 a.
[0063] The upper plate 63 illustrated in figs. 3 and 4 is a thin plate material made of metal which has an external shape which lies along the external shape of the first casing 66 looking along the direction of transit of the yarn. The first casing 66 is mounted on an upper side (downstream in the direction of transit of the yarn) of the second casing 67. The upper plate 63 is fixed, being positioned through an appropriate method, on an upper side (downstream in the transit direction of the yarn) of the first wrapping 66.
[0064] As shown in fig. 3, the yarn monitoring device 6 is provided with the slot 6a along the yarn transit direction. The slot 6a is formed in the form of a groove in which one side (front side) is opened looking along the direction of transit of the yarn. This means that the slot 6a is formed so as to penetrate the yarn monitoring device 6 in the yarn transit direction, and is configured so that the yarn 21 can be inserted from the open side (front side). The slot 6a is configured by means of three internal walls (rear wall 6b and a pair of side walls 6c, 6d). The transit space of the yarn 68 is formed inside the slot 6a (being surrounded by the three inner walls). The transit space of the yarn 68 is a space through which the yarn 21 can slide, which is a monitoring objective of the yarn monitoring device 6.
[0065] In the present embodiment, a slot 69a is formed in the support 69 (see Fig. 5) mounted on the first housing 66, a slot 67a is formed upstream of the first housing 66 and a slot 63a is formed in the upper plate 63 When each element constituting the yarn monitoring device 6 is housed in the first casing 66 and in the second casing 67, and the upper plate 63 is assembled to the first casing 66, the slots 69a, 67a, 63a are connected thus forming a slot 6a as a whole, as shown in fig. 3.
[0066] Describing more specifically the slot 6a, the slot 69a formed on the inner side of the first housing 66 (in the present embodiment, formed mainly in the support 69 mounted on the first housing 66) is configured by means of three internal walls with one side (side front) open. The three inner walls comprise a rear wall 69b, facing the open side of the transit space of the yarn 68, and a pair of side walls 69c, 69d which are the inner walls different from the rear wall 69b. In each of the pair of side walls 69c, 69d, an end (rear end) on the side opposite the open side is connected to the rear wall 69b. Each of the pair of side walls 69c, 69d is arranged to face the other.
[0067] Similarly, also the slot 67a formed upstream of the first casing 66 is configured by means of three internal walls (a rear wall 67b and a pair of side walls 67c, 67d) with one side (front side) open. In the present embodiment, the rear wall 67b is configured by means of a rear wall 90b of the flow path element 90. The side wall 67c on one side (right side) of the side walls 67c, 67d is configured by means of a portion (portion in to which the blade 81 is fixed facing the transit space of the yarn 68 of the cutting device 16 supported by the second casing 67. The side wall 67d on the other side (left side) of the side walls 67c, 67d is configured by means of a portion receiving the blade edge 81 a of the flow path element 90.
[0068] Also the slot 63a of the upper plate 63 is made with a groove shape with one side (front side) open.
[0069] When the first casing 66 and the second casing 67 housing each element constituting the yarn monitoring device 6, as well as the upper plate 63 are fixed together with the aforesaid configuration, the three slots 69a, 67a, 63a are integrated thus forming a single slot 6a. A specific configuration of the slot 6a is not limited to the configuration described above and various modifications are possible within a scope that does not deviate from the concept of the present invention.
[0070] The upstream yarn guide 64 is adapted to adjust the path of the yarn, through which the yarn 21 flows, in the transit space of the yarn 68. The upstream yarn guide 64 is made with a shape having a groove substantially V-shaped looking along the direction of transit of the yarn, and is fixed to project towards the inner side from the rear wall 69b of the support 69 with the open side made to coincide with the open side of the slot 6a. The upstream yarn guide 64 is fixed at an upstream end of the support 69. The upstream yarn guide 64 is arranged upstream in the direction of transit of the yarn of the sensing section 70 (in particular, the first sensor section 51). The cutting device 16 is arranged upstream in the transit direction of the yarn of the upstream yarn guide 64.
[0071] Also the downstream yarn guide 65 is adapted to adjust the yarn path, through which the yarn 21 flows, in the transit space of the yarn 68. The downstream yarn guide 65 has a shape similar to the guide of upstream yarn 64. The downstream yarn guide 65 is fixed at a downstream end of the support 69. The downstream yarn guide 65 is arranged downstream in the direction of transit of the yarn of the sensing section 70.
[0072] The upstream yarn guide 64 and the downstream yarn guide 65 are made of a material (ceramic in the present embodiment) having abrasion resistance properties. As shown in fig. 4, the yarn 21 passing through the transit space of the yarn 68 slides, coming into contact with a lower portion of the substantially V-shaped groove of the yarn guides 64, 65. The yarn path, through which the yarn 21 flows, with respect to the yarn monitoring device 6 it is therefore stabilized, so that the state of the yarn 21 can be permanently monitored in the detection section 70.
[0073] Subsequently, a description relating to a configuration of the detection section 70 assembled to the support 69 with reference to figs. 4, 5 and 7.
[0074] As described above, in the support 69 the first sensor section 51 is arranged upstream in the direction of transit of the yarn of the second sensor section 52.
[0075] As shown in fig. 5, the light-receiving element 38 is arranged at a part of the side wall 69c of the slot 69a formed in the yarn monitoring device 6 (support 69). In the light receiving element 38, a surface exposed to the internal space of the slot 69a forms a surface (incident surface) in which light enters. A transparent plate 39 (plate which lets the light pass) made of resin is mounted on the side wall 69d facing the side wall 69c, where the incident surface is arranged, and the light-emitting element 37 is arranged on one side ( inside of the support 69) opposite to the transit space of the yarn 68 with the transparent plate 39 between them. The light-emitting element 37 and the light-receiving element 38 are arranged to face each other with the path of the yarn between them. A surface (exit surface) from which the light coming from the light-emitting element 37 exits after passing through the transparent plate 39 is formed at a part of the side wall 69d. However, the incident surface can be formed on the side wall 69d of the slot 69a and the exit surface can be formed on the side wall 69c of the slot 69a. The transparent plate can be arranged in front of the light receiving element 38.
[0076] The light-emitting element 37 radiates light inside the transit space of the yarn 68 (towards the light-receiving element 38) through the transparent plate 39. The light-emitting element 37 e the light receiving element 38 is arranged so as to be facing one another with the path of the yarn between them. The monitoring control section 200 adapted to induce the operation of the light-receiving element 38 and the light-emitting element 37 is housed in the first casing 66.
[0077] According to the above configuration, a part of the lue coming from the light-emitting element 37 is shielded by the yarn 21 which slides through the transit space of the yarn 68 and received by the light-receiving element 38. Therefore , the intensity of the light received by the light-receiving element 38 varies due to the thickness of the yarn 21. Therefore, the yarn monitoring device 6 can detect the defect of yarn and the like by measuring the thickness of the yarn 21 based on the The intensity of the light received by the light-receiving element 38. The light-receiving element 38 may be arranged to receive the light reflected from the yarn 21. In the present embodiment, a detection signal emitted by the receiving element of the light 38 according to a light receiving amount is inputted into the monitoring control section 200 and the signal is subjected to an arithmetic process mediantly and the monitoring section of the monitoring 200, for which it is possible to find the defect of yarn and the like.
[0078] Furthermore, the yarn monitoring device 6 comprises a configuration for cleaning the upstream yarn guide 64, the first sensor section 51 and the cutting device 16. The yarn monitoring device 6 blows the compressed air (fluid) from a first emission port 71 relative to the upstream yarn guide 64 and to the first sensor section 51 and blows the compressed air from a second emission port 72 relative to the blade 81 of the cutting device 16 to sweep away the fiber waste, thus cleaning the upstream yarn guide 64, the first sensor section 51 and the blade 81 of the cutting device 16.
[0079] A configuration for cleaning the upstream yarn guide 64, the first sensor section 51 and the blade 81 of the cutting device 16 with reference to figs will be described in detail below. from 3 to 10.
[0080] The yarn monitoring device 6 comprises a compressed air introduction port (fluid introduction port) 73, the first emission port 71, the second emission port 72 and a distribution flow path (route of fluid flow) 100. The compressed air introduction port 73, the first emission port 71, the second emission port 72 and the distribution flow path 100 are formed in one of the first housing 66, the second housing 67 and the elements housed in these casings of the yarn monitoring device 6.
[0081] As shown in fig. 6, the compressed air introduction port 73 is an opening (inlet) through which the compressed air is introduced. In the present embodiment, the compressed air introduction port 73 is formed on a surface (rear surface) on a side opposite the open side of the slit 6a in the yarn monitoring device 6. A flexible tube 48 to supply the compressed air it is connected to the compressed air introduction port 73.
[0082] As shown in Figs. 4, 5 and 7, the first emission port 71 is an emission port (opening) for blowing the compressed air towards the upstream yarn guide 64 and the first sensor section 51. This means that the first emission port 71 is an emission port for blowing compressed air into a region which includes at least the upstream yarn guide 64. The first emission port 71 is formed at a downstream end of a first flow path 91 which will be described later.
[0083] The first emission port 71 is positioned on an outer side of the slot 6a near the open side of the slot 6a.
[0084] The first emission port 71 comprises a portion disposed downstream in the transit direction of the yarn of the upstream yarn guide 64. This means that, as shown in fig. 7, considering a virtual plane P1 perpendicular to the yarn transit direction and in contact with an upper end of the upstream yarn guide 64 (downstream ends in the yarn transit direction), most of the first emission port 71 is located on an upper side (downstream in the direction of yarn transit) of the virtual plane P1. According to this configuration of the first emission port 71, the compressed air expelled from the first emission port 71 flows into a portion near the downstream position in the transit direction of the yarn of the upstream yarn guide 64. Therefore, the air tablet ejected from the first emission port 71 uniformly reaches the portion near the upstream yarn guide 64.
[0085] Preferably, a portion equal to or greater than half of the first emission port 71 is arranged on the upper side (downstream in the direction of transit of the yarn) of the virtual plane P1. More preferably, a portion equal to or greater than 75% of the first emission port 71 is arranged on the upper side of the virtual plane P1. More preferably, a portion equal to or greater than 90% of the first emission port 71 is arranged on the upper side of the virtual plane P1. Therefore, the compressed air expelled from the first emission port 71 more evenly reaches the downstream portion of the upstream yarn guide 64 increasing the position which must be placed on the upper side of the virtual plane P1 in the first emission port 71.
[0086] Looking in a direction along the direction of transit of the yarn, a direction in which the compressed air is expelled from the first emission port 71 is a direction of approach to the first sensor section 51, as shown in fig. 5 and, specifically, is a direction towards a position slightly displaced from the transparent plate 39 of the side wall 6d on one side of the slot 6a. More specifically, the direction of emission of the compressed air expelled from the first emission port 71 is a direction in which, even if the expelled compressed air is directed towards the first sensor section 51, the compressed air does not directly strike a surface in which and from which the light of the first sensor section 51 enters and exits. The first emission port 71 expels the compressed air so as to strike directly a side wall 6d of the slot 6a. At least part of the expelled compressed air is expelled in an inclined direction with respect to the side wall 6d. Further on, a direction in which the compressed air is expelled by the first emission port 71 (each direction indicated by an arrow marked in Figs. 5 and 7) can be indicated as the first direction of emission. As shown in fig. 7, the first direction of emission can vary depending on the position in the direction of transit of the yarn, and can be a direction that approaches perpendicularly to the side wall 6d of the slot 6a, or it can be a direction that is inclined downstream in the direction of yarn transit as it approaches the side wall 6d.
[0087] Looking in the direction along the direction of transit of the yarn, at least a part of the first emission direction is inclined with respect to the side walls 6c, 6d of the slot 6a, as shown in fig. 5. Therefore, the compressed air expelled from the first emission port 71 enters the transit space of the yarn 68 from the open side of the slot 6a and is blown against a position slightly displaced by the transparent plate 39 (the position closest to the open side of the slot 6a with respect to the transparent plate 39) of a side wall 6d of the slot 6a.
[0088] Looking in the direction perpendicular to the rear wall 6b of the slot 6a, the first emission port 71 is made with an elongated shape in the direction of transit of the yarn, as shown in fig. 7 and the like. Therefore, the compressed air can be expelled quickly with a certain degree of width.
[0089] Looking in the direction perpendicular to the rear wall 6b of the slot 6a, a trapezoidal guide surface 71a adapted to guide the compressed air expelled by the first emission port 71 is continuously arranged at the first emission port 71. Of the two groups of opposite sides of the trapezoid formed by the guide surface 71 a, the opposite sides parallel to each other are directed so as to lie along the direction of transit of the yarn. The output (first emission port 71) of the compressed air is arranged to be lengthened so as to lie along a shorter side (short side) of the parallel opposite sides, and the compressed air expelled by the first emission port 71 flows along the guide surface 71 a. Of the remaining opposite sides of the guide surface 71 a, the upstream side in the yarn transit direction is substantially perpendicular to the yarn path, while the downstream side in the yarn transit direction is inclined with respect to the yarn path in a way to be downstream in the direction of transit of the yarn as it approaches the slot 6a. When guided by a roof surface (second guide surface) 71b formed with the downstream side in the direction of transit of the yarn of the guide surface 71 to a side and a floor surface (third guide surface) 71c formed with the upstream side in the direction of transit of the yarn as a side, the compressed air expelled from the first emission port 71 flows towards the first direction of emission (towards the longest side of the opposite parallel sides of the guide surface 71 a). The roof surface 71 b is a plane extending in a direction parallel to the downstream side in the direction of transit of the yarn of the guide surface 71 a and extending in a direction of depth (front and rear direction) of the monitoring device of the yarn 6. The floor surface 71c is a plane extending in a direction parallel to the upstream side in the direction of transit of the yarn of the guide surface 71 a and extending in the direction of the depth of the yarn monitoring device 6.
[0090] Therefore, looking in the direction perpendicular to the rear wall 6b of the slot 6a, the direction (first direction of emission) in which the compressed air is expelled by the first emission port 71 can vary, as shown in fig. 7, depending on the position in the yarn transit direction and can be a direction that approaches perpendicularly to the side wall 6d of the slot 6a, or it can be a direction that is inclined downstream in the direction of transit of the yarn as it approaches to the side wall 6d. Therefore, the compressed air can be blown over a wide field towards the inside of the transit space of the yarn 68 formed by the slot 6a. Of the compressed air expelled towards a side wall 6d from the first emission port 71, the compressed air blown in an inclined direction in the aforementioned manner passes through the position downstream of the upstream yarn guide 64 and subsequently performs a whirling motion spiral in the slot 6a, and is indirectly blown against the rear wall 6b and the other side wall 6c at a portion in which the first sensor section 51 is arranged. The fiber waste attached to the downstream surface in the direction of yarn transit and the like of the upstream yarn guide 64 is detached when the compressed air is blown towards it, and the fiber waste is swept away towards the position downstream of the yarn path together with the air flow that flows with a spiral motion as described above. Therefore, it is possible to prevent the fiber waste already blown back into the upstream yarn guide 64 with the yarn in transit 21.
[0091] Therefore, by blowing the compressed air from the first emission port 71 towards the region which includes the upstream yarn guide 64, it is possible to ensure that the compressed air acts strongly on the region immediately downstream in the transit direction of the yarn of the upstream yarn guide 64, where the compressed air did not arrive with the conventional configuration. Therefore, the fiber waste attached to the upstream yarn guide 64 can be satisfactorily swept away by the flow of compressed air emitted by the first emission port 71.
[0092] The yarn 21 slides upwards through the transit space of the yarn 68, but the fiber waste can fall due to its own weight and settle on the upper side (that is, downstream in the transit direction of the yarn) of the upstream yarn guide 64. However, in the present embodiment, the deposited fiber waste can be wiped off and removed from the flow of compressed air expelled from the first emission port 71, and it is possible to prevent the fiber waste attached to the upstream yarn guide 64 enters the detection region in the stop space of yarn 68 with yarn 21 and remains in the sensing region.
[0093] The first emission port 71 blows the compressed air not only towards the upper side of the upstream yarn guide 64 but also towards the first sensor section 51 and, consequently, also the first sensor section 51 can be cleaned additionally near the upstream yarn guide 64 with a single emission port (first emission port 71). This means that the portion related to the detection performance of the first sensor section 51 can be cleaned over a wide field with a single emission light (first emission light 71).
[0094] Furthermore, since the compressed air is not blown directly (but is blown indirectly) against the light receiving element 38 or the transparent plate 39, even if the level of cleaning of the compressed air is low, it is possible preventing the light receiving element 38 or the transparent plate 39 (incident surface and light exit surface) from becoming dirty due to the dirt transported by the compressed air, thereby preventing the detection performance of the detection section 70 is reduced.
[0095] As shown in fig. 7, the end (upper end portion) downstream in the yarn transit direction of the first emission port 71 is positioned upstream (lower side) in the yarn transit direction from the second sensor section 52, so that it is possible to prevent the compressed air from the first emission port 71 flowing in excess towards the second sensor section 52. Thus, the compressed air expelled from the first emission port 71 can be intensively blown against a region comprising the upstream yarn guide 64, so that the relevant region can be cleaned effectively in a concentrated manner.
[0096] The compressed air is supplied by the compressed air introduction port 73 to the first emission port 71 through the distribution flow path 100. The path of supplying the compressed air will be described later.
[0097] As shown in fig. 6, the second emission port 72 is an emission port (opening) adapted to expel (inject) the compressed air so as to blow the compressed air towards the edge of the blade 81 a of the blade 81 of the cutting device 16 .
[0098] The second emission port 72 is formed at a portion which constitutes the rear wall 67b of the slot 67a when assembled being housed in the second casing 67 of the flow path element 90. As shown in Fig. 6, the second emission port 72 is arranged in a position displaced from the yarn path by looking in a direction of the depth of the slot 67a (looking in a direction perpendicular to the rear wall 67b). The direction close to the exit of the second emission port 72 is directed straight towards the blade edge 81 a of the blade 81 in the waiting state portrayed by the yarn path. This means that the second emission port 72 expels the compressed air in the straight direction towards the open side of the slot 6a. Later, this direction can be referred to as a second direction of emission.
[0099] The blade edge 81 a of the blade 81 in the waiting state is arranged on an extended line of the second emission direction. The contour of the second emission port 72 is circular, and the diameter is formed so as to be preferably less than or equal to 1.0 mm, and more preferably less than or equal to 0.6 mm. Thus, the compressed air expelled from the second emission port 72 can be blown locally towards the blade edge 81 a of the blade 81 of the cutting device 16. The blade edge 81a of the blade 81 of the cutting device 16 is generally a position in which filaments and the like of yarn 21 are likely to be captured, and by blowing compressed air locally toward the relevant portion, the necessary portion of the cutting device 16 can be effectively cleaned with a small amount of flow .
[0100] As shown in fig. 7, the second emission port 72 is formed upstream (lower side) in the transit direction of the yarn of the upstream yarn guide 64, and the compressed air is not blown against the upstream yarn guide 64. This means that the second emission port 72 is configured as a dedicated emission port for cleaning the cutting device 16. Therefore, each emission port (first emission port 71 or second emission port 72) is arranged as a dedicated emission port for cleaning the cleaning objective (upstream yarn guide 64 and first sensor section 51, or cutting device 16), so that each emission port can be designed with an optimum arrangement and shape for proper cleaning each cleaning goal.
[0101] The compressed air is supplied by the compressed air introduction port 73 to the second emission port 72 through the distribution flow path 100. The compressed air supply path will be described later.
[0102] A description of the distribution flow path 100 will be briefly described below with reference to figs. from 8 to 11.
[0103] The distribution flow path 100 is a flow path adapted to guide the compressed air introduced by the compressed air introduction port 73 into the first emission port 71 and into the second emission port 72. The flow path of distribution 100 comprises an introduction path 93, a first flow path 91, a second flow path 92 and an intermediate path 94.
[0104] As shown in fig. 8, the introduction path 93, the first flow path 91, at least a part of the second flow path 92 and the intermediate path 94 of the distribution flow path 100 are formed in the flow path element 90, which is a metal element partially housed in the second casing 67. The flow path element 90 is made with a flat plate shape having a recess 90a. When the flow path element 90 is partially housed in the second housing 67, the rear wall 90b of the recess 90a constitutes a part of the rear wall 6b of the slot 6a (part of the rear wall 67b of the slot 67a). When the flow path element 90 is partially housed in the second housing 67, the rear wall 90b of the recess 90a and a surface (rear surface) on a side opposite the recess 90a of the flow path element 90 are exposed without being covered by the second housing 67. The compressed air introduction port 73 and the second emission port 72 are formed at portions in which the flow path element 90 is exposed.
[0105] In the following description, "upstream in an air flow direction (upstream in a fluid flow direction)" and "downstream in an air flow direction {downstream in a direction of fluid flow) indicate respectively upstream and downstream of the flow path in the direction in which the compressed air (fluid) flows.
[0106] The introduction path 93 is a linear flow path having an end provided with the compressed air introduction port 73. The introduction path 93 is formed to extend perpendicularly towards the rear surface (specifically, the rear surface of the flow path element 90) from the rear surface side of the yarn monitoring device 6. The other end of the introduction path 93 is connected to the intermediate path 94.
[0107] The first flow path 91 is a flow path having one end provided with the first emission port 71. The first flow path 91 is folded several times in its course. The first flow path 91 is formed on a plurality of elements (specifically, the flow path element 90, the first housing 66 and the second housing 67). Specifically, the flow path from the end connected to the intermediate path 94 to the center of the first flow path 91 is formed in the flow path element 90. Furthermore, as shown in Fig. 4, the flow path from the center to the first emission port 71 is formed in the second housing 67. At a portion near the first emission port 71, a downstream part in the transit direction of the flow path yarn is formed in the first casing 66, and the remaining portion (an upstream part in the direction of transit of the yarn) is formed in the second casing 67. The first emission port 71 is formed to cross the first casing 66 and the second casing 67. portion formed in the flow path element 90 in the first flow path 91 is formed by a surface (lower surface) on one side in a direction of the thickness of the flow path element 90 so as to extend perpendicular to the lower surface, as illustrated in figs 9 and 10. The first emission port 71 is formed at one end of the first flow path 91, as described above, and the other end of the first flow path 91 is connected to the intermediate path 94.
[0108] The second flow path 92 is a linear flow path having one end provided with the second emission port 72. The second flow path 92 of the present embodiment is formed to extend perpendicular to the rear wall 90b from the rear wall 67b of the slot 67a (more specifically, the rear wall 90b of the recess 90a of the flow path element 90). The other end of the second flow path 92 is connected to the intermediate path 94. In the present embodiment, the second flow path 92 is entirely formed in the flow path element 90.
[0109] The intermediate path 94 is a linear flow path, in which one end of the introduction path 93, one end of the second flow path 92 and one end of the first flow path 91 are each connected to different positions in this order downstream in the direction of air flow. The intermediate path 94 extends in a different direction from any of the direction in which the introduction path 93 extends, the direction in which the second flow path 92 extends and the direction in which the first flow path 91 extends In the present embodiment, the intermediate path 94 extends in a direction perpendicular to all directions between the direction in which the introduction path 93 extends, the direction in which the second flow path 92 extends and the direction in which the first flow path 91 extends. Therefore, in the intermediate path 94, the end in which the second flow path 92 is connected to the intermediate path 94 is positioned downstream in the direction of air flow with respect to the end in which the introduction path 93 is connected to the intermediate path 94. This means that the position in which the second flow path 92 is connected to the intermediate path 94 is moved downstream in the direction of air flow with respect to the position in which the introduction path 93 is connected to the intermediate path 94.
[0110] According to the distribution flow path 100 configured as above, the compressed air introduced by the compressed air introduction port 73 into the yarn monitoring device 6 (according to casing 67) is distributed to the first flow path 91 and to the second flow path 92 and ejected from the respective emission ports (first emission port 71 and second emission port 72).
[0111] The position in which the end of the second flow path 92 is connected to the intermediate path 94 is moved downstream in the air flow direction with respect to the position in which the end of the introduction path 93 is connected to the intermediate path 94. Therefore, it is possible to prevent the compressed air introduced by the introduction path 93 from being significantly deviated and flowing in the second flow path 92. A diameter (diameter of the end of the second flow path 92) D2 of a circular opening in which the second flow path 92 is connected to the intermediate path 94 is formed so as to be smaller than a diameter (diameter of the end of the introduction path 93) D3 of a circular opening in which the introduction path 93 it is connected to the intermediate path 94 (D2 <D3). Therefore, the compressed air with a weakened force is blown from the second emission port 72 against the blade edge 81 a of the cutting device 16. Therefore, a localized cleaning can be performed concentrated on the position in which the fiber waste of the cutting device 16 using a small amount of compressed air, so that superfluous consumption of the compressed air can be reduced.
[0112] As shown in figs 9 and 10, a diameter (diameter of the end of the first flow path 91) D1 of a circular opening in which the first flow path 91 is connected to the intermediate path 94 is formed so as to be greater than a diameter (diameter of the end of the second flow path 92) D2 of a circular opening in which the second flow path 92 is connected to the intermediate path 94 (D1> D2). Therefore, the amount of flow of the compressed air flowing in the second flow path 92 can be reduced with respect to the amount of flow of the compressed air flowing in the first flow path 91. As a result, in the present embodiment, a small amount of compressed air is supplied to the second emission port 72 so that the cutting device 16 can be cleaned sufficiently simply by blowing the compressed air towards the blade edge 81 a in a localized manner, while a relatively large amount of compressed air can be fed to the first emission port 71 in such a way as to blow the compressed air with a great force on a wide field (that is, on a wide width of the slot 6a) for the upstream yarn guide 64 and the detection section 70. The amount of flow of compressed air to be fed can be adjusted according to each cleaning objective, and cleaning can be performed performed effectively.
[0113] In the distribution flow path 100 having this configuration, the diameter, the shape, the cross-sectional area and the like of the flow path and of the opening are set appropriately so that the compressed air introduced from the compressed air introduction port 73 it can be appropriately distributed to the compressed air which will be expelled by the first emission port 71 and to the compressed air which will be expelled by the second emission port 72. Therefore, the compressed air can be ejected appropriately for cleaning depending on the cleaning objective.
[0114] As described above, the yarn monitoring device 6 of the present embodiment comprises the sensing section 70 and the upstream yarn guide 64 which acts as a regulating element of the upstream yarn. The detection section 70 detects the state of the yarn 21 in the transit space of the yarn 68 through which the yarn 21 flows. The upstream yarn guide 64 is arranged upstream in the direction of transit of the yarn of the detection section 70 and is adapted to adjust the path of the yarn, which is the transit position of the yarn 21 in the transit space of the yarn 68. The yarn monitoring device 6 is provided with the first emission port 71 adapted to blow the compressed air which acts as the fluid against the region comprising at least the upstream yarn guide 64. The first emission port 71 comprises a portion disposed downstream in the direction of transit of the yarn of the upstream yarn guide 64.
[0115] Therefore, since the first emission port 71 comprises the portion disposed downstream in the transit direction of the yarn of the upstream yarn guide 64, the flow of compressed air is formed near the downstream position in the transit direction of the yarn of the upstream yarn guide 64. Consequently, the compressed air expelled from the first emission port 71 uniformly reaches the portion near the upstream yarn guide 64. Therefore, the fiber waste near the guide of upstream yarn 64 can be effectively wiped off the compressed air expelled from the first emission port 71. As a result, it is possible to prevent the fiber waste of the upstream yarn guide 64 from entering the sensing region, in particular in the transit space of yarn 68 with yarn 21 and remains in the sensing region.
[0116] In the yarn monitoring device 6 of the present embodiment, the downstream position in the transit direction of the yarn 21 coincides with an upper side vertically.
[0117] Therefore, even if the fiber waste is deposited on the upper side (that is, downstream in the direction of transit of the yarn) of the upstream yarn guide 64 due to its own weight, this fiber waste can be swept away and removed from the compressed air expelled by the first emission port 71. It is possible to prevent the fiber waste deposited on the upstream yarn guide 64 from entering the detection region with the yarn and remaining in the detection region.
[0118] In the yarn monitoring device 6 of the present embodiment, the first emission port 71 is made with an elongated shape in the yarn transit direction.
[0119] Therefore, the compressed air can be strongly expelled from the first emission port 71 through a relatively wide field along the direction of transit of the yarn, so that the fiber waste near the upstream yarn guide 64 can be satisfactorily wiped out.
[0120] The yarn monitoring device 6 of the present embodiment further comprises the downstream yarn guide 65. The downstream yarn guide 65 is arranged downstream in the yarn transit direction of the sensing section 70 and is adapted to adjusting the transit position (yarn path) of yarn 21 in the transit space of yarn 68. As illustrated in fig. 7, a portion of the emission direction (the portion of the first emission direction) of the compressed air expelled from the first emission port 71 is inclined with respect to the yarn path defined by the upstream yarn guide 64 and by the downstream yarn guide 65 so as to approach the downstream position in the direction of transit of the yarn with an increasing distance from the first emission port 71.
[0121] Therefore, the fiber waste is swept away so as to move away towards the position downstream of the yarn path from the area near the upstream yarn guide 64, so that it is possible to prevent the fiber waste already swept away lathes in the transit space of yarn 68 with the yarn in transit 21.
[0122] In the yarn monitoring device 6 described above, a portion of the direction of emission of compressed air expelled from the first emission port 71 is formed so as to be a direction towards the sensing section 70.
[0123] Therefore, not only the area in proximity of the upstream yarn guide 64 but also the detection section 70 (incident surface and the exit surface of the same) can be cleaned simultaneously by means of the compressed air expelled from the first emission light 71.
[0124] The yarn monitoring device 6 of the present embodiment also has the following configuration. Specifically, the transit space of the yarn 68 is formed with three sides surrounded by the pair of side walls 6c, 6d and the rear wall 6b. The direction of emission of the compressed air expelled from the first emission port 71 towards the sensing section 70 is formed so as to be a direction in which the expelled compressed air enters the transit space of the yarn 68 from the open side of the space. transit of the yarn 68 (the space formed by the slit 6a) and is blown against a side wall 6d of the pair of side walls 6c, 6d.
[0125] Therefore, the compressed air expelled from the first emission port 71 towards the sensing section 70 enters the transit space of the yarn 68 from the open side and is blown against a side wall 6d of the pair of side walls 6c, 6d, whereby the flow of compressed air is generated which performs a whirling motion in the transit space of the yarn 68 and, consequently, the compressed air is also blown against the rear wall 6b and the other side wall 6c. Therefore, the interior of the transit space can be cleaned over a large region.
[0126] In the yarn monitoring device 6 of the present embodiment, the detection section 70 comprises the first sensor section 51 with the light emission element 37 which acts as a light projection section to radiate the light towards the yarn 21, and the light-receiving element 38 adapted to receive the light radiated by the light-emitting element 37. Looking in the direction along the direction of transit of the yarn, the direction of emission of the compressed air expelled from the first light of emission 71 towards the sensing section 70 is formed so as to be a direction towards a position which avoids both the surface (the output surface described above) from which the light coming from the light-emitting element 37 comes out, and the surface (the incident surface described above) in which light enters the light-receiving element 38, in the side walls 6c, 6d.
[0127] This means that, if the light-emitting surface coming from the light-emitting element 37 and the incident surface of the light towards the light-receiving element 38 become dirty, this could influence the detection result of the section of detection 70 (first sensor section 51). In this regard, in the present configuration, the compressed air is expelled towards the position which avoids both the light-emitting surface from the light-emitting element 37 and the incident surface of the light towards the light-receiving element 38 in the side walls 6c, 6d in such a way that, even if the compressed air is dirty, the detection performance of the sensing section 70 (first sensor section 51) can be kept high.
[0128] In the yarn monitoring device 6 of the present embodiment, the sensing section 70 further comprises the second sensor section 52 disposed downstream in the yarn transit direction of the first sensor section 51. The downstream end in the yarn transit direction of the first emission port 71 is positioned upstream in the yarn transit direction of the second sensor section 52.
[0129] Therefore, the compressed air expelled from the first emission port 71 does not flow in excess towards the second sensor section 52, so that the compressed air expelled by the first emission port 71 can be intensely blown against the region which includes the upstream yarn guide 64, and this region can be effectively cleaned in a concentrated manner.
[0130] The yarn monitoring device 6 of the present embodiment further comprises the blade 81 of the cutting device 16 and the second emission port 72. The blade 81 of the cutting device 16 is arranged upstream in the direction of transit of the yarn of the upstream yarn guide 64 and is adapted to cut the yarn 21 in transit through the transit space of the yarn 68. The second emission port 72 is arranged to blow the compressed air towards the blade 81 of the cutting device 16. The second emission port 72 is formed upstream in the transit direction of the yarn of the upstream yarn guide 64.
[0131] Therefore, the blade 81 of the cutting device 16 is cleaned from the compressed air expelled not from the first emission port 71 but from the second emission port 72 and, consequently, the first emission port 71 can be considered as a dedicated emission port adapted to remove the fiber waste associated with the detection performance of the first sensor section 51. Therefore, the first emission port 71 can be arranged in a position suitable for sweeping away the fiber waste near the guide of upstream yarn 64, and the first emission port 71 can be made with a shape suitable for sweeping away the fiber waste near the upstream yarn guide 64. Therefore, each position can be cleaned properly from the compressed air expelled from the single emission light.
[0132] In the yarn monitoring device 6 of the present embodiment, the transit space of the yarn 68 is formed with the three sides surrounded by the pair of side walls 6c, 6d and the rear wall 6b of the slot 6a. The direction of emission of the compressed air expelled from the second emission port 72 is formed so as to be a direction towards the open side of the transit space of the yarn 68.
[0133] Therefore, the fluid is emitted by the second emission port 72, so that the fiber waste in the transit space of the yarn 68 can be swept out of the transit space of the yarn 68.
[0134] Furthermore, the yarn monitoring device 6 of the present embodiment comprises the downstream yarn guide 65. The downstream yarn guide 65 is arranged downstream in the yarn transit direction of the sensing section 70, and is adapted to adjust the position (path of the yarn) in which the yarn 21 slides in the transit space of the yarn 68. The blade 81 of the cutting device 16 is arranged in a position moved by the yarn path defined by the upstream yarn guide 64 and from the downstream yarn guide 65 looking in a direction perpendicular to the rear wall 6b, and the direction of emission of the compressed air ejected from the second emission port 72 is formed so as to be a direction towards the edge of blade 81 a of the blade 81 of the cutting device 16 in the waiting state without passing through the path of the yarn.
[0135] Therefore, the compressed air expelled from the second emission port 72 can be blown appropriately towards the blade 81 of the cutting device 16 in the waiting state in which the yarn 21 is not cut to clean the blade 81. Furthermore , the advantage is obtained that the yarn 21 is not made to oscillate even if the fluid emitted by the second emission port 72 is blown against the blade 81 of the cutting device 16 during the passage of the yarn.
[0136] The yarn monitoring device 6 of the present embodiment further comprises the compressed air introduction port 73 and the distribution flow path 100. The compressed air is introduced into the compressed air introduction port 73. The path of distribution flow 100 guides the compressed air introduced by the compressed air introduction port 73 towards the first emission port 71 and the second emission port 72. The distribution flow path 100 includes the introduction path 93, the first flow path 91, the second flow path 92 and the intermediate path 94. The compressed air introduction port 73 is formed at one end of the introduction path 93. The first emission port 71 is formed at a end of the first flow path 91. The second emission port 72 is formed at one end of the second flow path 92 The other end of the introduction path 93, the other end of the first flow path 91 and the other end of the second flow path 92 are each connected to the intermediate path 94 in different positions in the direction of air flow ( fluid flow direction) of the intermediate path 94. The intermediate path 94 extends in a different direction from any of the direction in which the introduction path 93 extends, the direction in which the first flow path 91 extends and the direction in which the second flow path 92 extends. At the intermediate path 94, the end (the other end) in which the second flow path 92 is connected to the intermediate path 94 is positioned downstream in the flow direction of the air with respect to the end (the other end) where the introduction path 93 is connected to the intermediate path 94.
[0137] Therefore, the compressed air introduced by the compressed air introduction port 73 can be distributed appropriately to the compressed air which will be expelled by the first emission port 71 and to the compressed air which will be expelled by the second emission port 72 by appropriately setting the diameter, the cross-sectional area and the like of the first emission port 71, of the second emission port 72 and of each flow path. Therefore, an adjustment is made in such a way that each of the flow quantity of the compressed air expelled from the first emission port 71 towards the upstream yarn guide 64 and the sensing section 70 (first sensor section 51) and the amount of flow of the compressed air expelled from the second emission port 72 towards the blade 81 of the cutting device 16 becomes an appropriate amount of flow, so that all the positions can be cleaned in a suitable manner.
[0138] Moreover, in the yarn monitoring device 6 of the present embodiment, the diameter Di of the opening (the other end) in which the first flow path 91 is connected to the intermediate path 94 is greater than the diameter D2 of the opening (the other end) in which the second flow path 92 is connected to the intermediate path 94 (D1> D2). This means that the opening of the first flow path 91 is greater than the opening of the second flow path 92.
[0139] Therefore, the amount of flow of the compressed air flowing in the first flow path 91 can be increased relative to the amount of flow of the compressed air flowing in the second flow path 92 and, moreover, the amount of compressed air that will be blown towards the region comprising the upstream yarn guide 64 can be increased with respect to the amount of compressed air that will be blown towards the blade 81 of the cutting device 16. Therefore, a large quantity of compressed air is fed to the first light of emission 71 for the region comprising the upstream yarn guide 64 in which it is desirable for the compressed air to be blown over a wider region, while a small amount of compressed air is supplied to the second emission port 72 for the blade 81 of the cutting device 16 in which it is desirable for the compressed air to be blown in a localized manner, so that the cleaning target can be effectively without wasting compressed air.
[0140] The preferred embodiment of the present invention has been described above but the configuration described above can be modified as follows.
[0141] In the embodiment described above, the first direction of emission is a direction in which the compressed air is blown diagonally towards a side wall 69d from the open side of the slot 67a, 69a, but the present invention is not limited thereto. Alternatively, the first direction of emission can be a direction in which the compressed air is blown diagonally towards the other side wall 69c from the open side of the slot 67a, 69a.
[0142] In the embodiment described above, the compressed air is expelled from the first emission port 71 and from the second emission port 72, but the present invention is not limited thereto and a gas (fluid) different from the air. For example, a gas containing a small amount of liquid may be emitted.
[0143] The shape and size of the first emission port 71 and of the second emission port 72 are not limited to those described above and can be modified appropriately. For example, the shape of the first emission port 71 is preferably a form in which at least a part of the emitted fluid uniformly reaches an area near the upstream yarn guide 64 and, for example, may be a parallelogram shape , rectangle, ellipse and trapezoid. The first emission port 71 can be assumed as a three-dimensional emission port in which the guide surface 71a, the roof surface 71b and the floor surface 71c are integrated.
[0144] Moreover, the opening of the portion in which each of the introduction path 93, the first flow path 91 and the second flow path 92 is connected to the intermediate path 94 can be made with other shapes (for example, a polygon) instead of being made with a circular shape as in the embodiment described above.
[0145] In the embodiment described above, the first sensor section 51 is configured as an optical sensor comprising a light-emitting element 37 on a side wall 6d and a light-receiving element 38 on the other side wall 6c. However, the present invention is not limited to this and one or a plurality of light-emitting elements and one or a plurality of light-receiving elements can be provided. This means that, for example, a light-emitting element and a light-receiving element can be arranged on a side wall 6d and the light-receiving element corresponding to this light-emitting element and the emission element of the light corresponding to this light-receiving element can be arranged on the other side wall 6c. The number of light-receiving elements corresponding to the light-emitting element is not limited to one and a plurality of light-receiving elements can be arranged relative to a light-emitting element.
[0146] In the embodiment described above, the second sensor section 52 is configured as an optical sensor similar to the first sensor section 51. However, the present invention is not necessarily limited thereto and the second sensor section can be configured as a capacitance sensor, and can measure a capacitance between a pair of electrodes to detect the state of the yarn 21 in transit between the electrodes. The first sensor section can be configured as the capacitance sensor and the second sensor section can be configured as the optical sensor. Both the first sensor section and the second sensor section can be configured as capacitance sensors.
[0147] In the embodiment described above, the yarn monitoring device 6 monitors the intensity of the light shielded from the yarn to detect the thickness of the yarn, but the present invention is not limited thereto and, for example, the monitoring device of the yarn 6 can monitor the intensity of the light reflected by the yarn 21 to detect the presence / absence of foreign substances contained in the yarn 21.
[0148] In the embodiment described above, the terms "first sensor section 51", "first emission port 71" and the like have been used in the description, but this is not intended to exclude a case in which only a detection section is arranged or an emission light. This means that a configuration can be adopted in which the second sensor section 52 is not arranged and only the first sensor section 51 is provided for the detection section, and a configuration in which the second emission port 72 is not arranged and only the first emission port 71 is provided for the emission light.
[0149] In the embodiment described above, the yarn 21 slides from the lower side towards the upper side. However, alternatively, the yarn 21 can slide from the upper side to the lower side. In this case, the yarn monitoring device 6 illustrated in fig. 4 and the like can be used upside down.
[0150] The yarn monitoring device described in the embodiment described above is not limited to being used in the automatic winder and, for example, it can be fixed and used in other types of textile machines such as a spinning machine.
[0151] In the embodiment described above, the compressed air flowing from the intermediate path 94 to the second flow path 92 flows along a path perpendicular to the intermediate path 94 in the flow path element 90, but the compressed air flows along a path in an inclined direction in a diagonal direction with respect to the intermediate path 94 downstream of the flow path element 90. However, the present invention is not limited to this and the compressed air can also flow along a path perpendicular to the path intermediate 94 downstream of the flow path element 90. An example is shown in fig. 12.

权利要求:
Claims (13)
[1]
claims
1. A yarn monitoring device (6) characterized in that it comprises: a detection section (70) adapted to detect a state of a yarn (21) in a yarn transit space (68) through which the yarn (21); an upstream yarn path regulating element (64) arranged upstream of said sensing section (70) in a yarn transit direction and adapted to adjust a yarn path, which is a yarn transit position (21) in the transit space of the yarn (68), a first emission port (71) adapted to emit a fluid towards a region comprising at least the upstream yarn path regulating element (64), called the first emission port (71) comprising a portion disposed downstream of said yarn path regulating element upstream (64) in the yarn transit direction.
[2]
2. A yarn monitoring device (6) according to claim 1, characterized in that the downstream position in the yarn transit direction has at least one component vertically directed upwards, and more preferably coincides with a vertically upper side .
[3]
3. A yarn monitoring device (6) according to claim 1 or 2, characterized in that the first emission port (71) is made with an elongated shape in the yarn transit direction.
[4]
4. A yarn monitoring device (6) according to any one of claims 1 to 3, characterized in that it further comprises: a downstream yarn path regulating element (65) arranged downstream of said detection section (70 ) in the yarn transit direction and adapted to adjust the yarn path, in which at least a part of the fluid emitted by said first emission port (71) has an emission direction which is inclined with respect to the yarn path defined by the element yarn path regulator upstream (64) and downstream yarn path regulating element (65), so as to move towards the valley in the yarn transit direction with an increasing distance from the first emission port (71) .
[5]
5. A yarn monitoring device (6) according to any of the claims from 1 to 4, characterized in that at least a part of the fluid emitted by the first emission port (71) has an emission direction which is directed towards the section detection (70).
[6]
6. A yarn monitoring device (6) according to claim 5, characterized in that the transit space of the yarn (68) is formed with three sides surrounded by a pair of side walls (6c, 6d) and a rear wall (6b); and a direction of emission of the fluid emitted by the first emission port (71) towards the sensing section (70) is formed to be a direction in which said fluid enters the transit space of the yarn (68) from an open side of the space of yarn transit (68) and is issued against one of the pair of side walls (6c, 6d).
[7]
7. A yarn monitoring device (6) according to claim 6, characterized in that the detection section (70) comprises a first sensor section (51) having a light projection section (37) adapted to radiate light towards the yarn (21) and a light receiving section (38) adapted to receive the light radiated from the light projection section (37), and looking in a direction along the direction of transit of the yarn, the emission direction of the fluid emitted from the first emission port (71) towards the sensing section (70) is directed towards a position which avoids both a light exit surface of the light projection section (37) and an incident surface of the light of the section of light reception (38) in the side walls (6c, 6d).
[8]
8. A yarn monitoring device (6) according to claim 7, characterized in that the detection section (70) further comprises a second sensor section (52) arranged downstream of the first sensor section (51) in the direction yarn transit; and one end of the first emission port (71), which is a downstream end in the yarn transit direction, is positioned upstream of the second sensor section (52) in the yarn transit direction.
[9]
9. A yarn monitoring device (6) according to any of the claims from 1 to 8, characterized in that it further comprises: a cutting section (81) arranged upstream of said upstream yarn path regulating element (64 ) in the yarn transit direction, and adapted to cut a yarn in transit through the yarn transit space (68); and a second emission port (72) adapted to emit a fluid towards the cutting section (81), in which the second emission port (72) is formed upstream of said upstream yarn path regulating element (64) in the direction of yarn transit.
[10]
10. A yarn monitoring device (6) according to claim 9, characterized in that the transit space of the yarn (68) is formed with three sides surrounded by a pair of side walls (6c, 6d) and a rear wall ( 6b); the second emission port (72) is formed in the rear wall (6b); and a direction of emission of the fluid emitted by the second emission port (72) is directed towards an open side of the yarn transit space (68).
[11]
11. A yarn monitoring device (6) according to claim 10, characterized in that it further comprises a downstream yarn path regulating element (65) arranged downstream of said detection section (70) in the transit direction of the yarn and adapted to adjust the path of the yarn, in which, in a waiting state in which the yarn (21) is not cut, the cutting section (81) is arranged in a position moved by a yarn path defined by the yarn upstream yarn path regulating element (64) and from the downstream yarn path regulating element (65) looking in a direction perpendicular to the rear wall (6b), and a direction of emission of the fluid emitted by the second emission port (72) is directed towards the cutting section (81) without passing through the path of the yarn.
[12]
12. A yarn monitoring device (6) according to any of the claims from 9 to 11, characterized in that it further comprises: a fluid introduction port (73) through which a fluid is introduced; and a fluid flow path (100) adapted to guide the fluid introduced by the fluid introduction port (73) towards the first emission port (71) and towards the second emission port (72), wherein the path of fluid flow (100) comprises: an introduction path (93) having an end provided with the fluid introduction port (73), a first flow path (91) having an end provided with the first emission port (71), a second flow path (92) having one end provided with the second emission port (72), and an intermediate path (94) having the other end of the introduction path (93), the other end of the first flow path (91) and the other end of the second flow path (92) connected in different positions and extending in a different direction from any of a direction in which the introduction path (93) extends, a direction in which the first flow path (91) and one of in which the second flow path (92) extends, and in the intermediate path (94), the other end of the second flow path (92) is positioned downstream in one direction of fluid flow with respect to the other end of the introduction route (93).
[13]
13. A yarn monitoring device (6) according to claim 12, characterized in that an opening where the first flow path (91) is connected to the intermediate path (94) is greater than an opening where the second path flow (92) is connected to the intermediate path (94).

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同族专利:

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公开号 | 公开日

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CH712132B1|2020-12-15|

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DE102017200067A1|2017-08-17|

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JP2017141106A|2017-08-17|

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CN107082320A|2017-08-22|

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CN107082320B|2020-09-08|

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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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JP2016025361A|JP2017141106A|2016-02-12|2016-02-12|Yarn monitoring device|

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