• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A weft thread inserting device of an air jet loom includes a weft thread feeder, a weft thread storage device, a flap, a weft thread insert nozzle provided. on the wing, a first tandem nozzle provided upstream of the weft thread insertion nozzle and having a first acceleration tube and a second tandem nozzle provided upstream of the first tandem nozzle and having a second acceleration tube . The second acceleration tube of the second tandem nozzle is shorter than the first acceleration tube of the first tandem nozzle.
    公开号:BE1022230B1
    申请号:E2012/0578
    申请日:2012-09-04
    公开日:2016-03-03
    发明作者:Atsushi Hamaguchi；Yoichi Makino
    申请人:Kabushiki Kaisha Toyota Jidoshokki；
    IPC主号:
    专利说明:

    DEVICE FOR INSERTING FRAME WIRE TO A
    AIR JET WEAVE
    BASIS OF THE INVENTION
    The present invention relates to a weft insertion device for a jet loom of the air jet type.
    Japanese Patent Application Publication No. 01-280047 discloses a weft insertion device of an air jet type loom which allows a weft yarn to fly stably without having to change the state of a main nozzle for the insertion of the weft thread and which also makes it possible to set the pressure for the main nozzle at a lower value than that which is obtained when using a single nozzle . Specifically, a subsidiary nozzle is provided between a weft yarn storage device and the main nozzle, and the injection pressure and the injection period of the subsidiary nozzle are adjusted according to the flight status of the yarn. weft, so that the weft transport force can be adjusted directly and automatically without changing the insertion state of the weft thread of the main nozzle.
    In recent years, there has been a demand for high-speed spinning looms that can be operated at speeds of about 1000 rpm, thereby increasing the productivity of weaving. In general, the rate of flight of a weft yarn can be increased by raising the air pressure supplied to the main nozzle and the subsidiary nozzles. However, when the air pressure is too high, the weft thread may break. Similarly, an increase in air consumption leads to an increase in the cost of production. Thus, the weft insertion device whose main nozzle and a subsidiary nozzle are in accordance with the publication indicated above, suffers from a limitation as to the increase in insertion speed of the weft thread for the air jet loom.
    It is conceivable to provide an additional subsidiary nozzle in the weft insertion device of the above-mentioned publication so as to obtain a high-speed air jet loom. However, the addition of a subsidiary nozzle poses problems such as increasing air consumption and enlarging the mounting space in the air jet loom. In addition, the addition of a nozzle does not simplify the threading operation of a weft thread through the weft insertion device. In addition, the adjustment of the air flow between the existing subsidiary nozzle and the additional subsidiary nozzle must be suitably carried out so as to exclude a breakage of the weft thread or a deterioration of the latter when the weft yarn is tighter between the existing subsidiary nozzle and the additional subsidiary nozzle.
    It is an object of the present invention to provide a weft yarn inserting device of an air jet type loom, which provides high speed weft yarn insertion.
    SUMMARY OF THE INVENTION
    A weft insertion device of an air jet type loom includes a weft feed, a weft yarn storage device, a leaf, a yarn insertion nozzle frame provided on the leaf, a first tandem nozzle provided upstream of the weft insertion nozzle and having a first acceleration tube and a second tandem nozzle provided upstream of the first tandem nozzle and having a second tube 'acceleration. The second acceleration tube of the second tandem nozzle is shorter than the first acceleration tube of the first tandem nozzle. Other aspects and advantages of the invention will become apparent from the following description when taken in conjunction with the accompanying drawings which illustrate by way of example the principles of the invention.
    BRIEF DESCRIPTION OF THE DRAWINGS
    The features of the present invention which are considered to be new are referred to in particular in the appended claims. The invention together with its objects and with its advantages can best be understood by reference to the following description of the presently preferred embodiments together with the accompanying drawings in which: FIG. 1 is a block diagram in FIG. which shows a weft insertion device according to a first embodiment of the present invention; Fig. 2 is a schematic plan view showing a polychrome weft insertion device according to the first embodiment; Fig. 3 is a plan view showing a first tandem nozzle and a second tandem nozzle of the polychrome weft insertion device according to Fig. 2; Figure 4 is a front view of the first and the second tandem nozzle of Figure 3; Fig. 5 is a schematic view showing the structure of the weft insertion nozzle, the first tandem nozzle and the second tandem nozzle; Fig. 6A is a schematic side view of a weft yarn braking device of the weft insertion device of FIG. 2, in which the operation of the weft braking device is explained; Fig. 6B is a schematic front view of the weft yarn braking device of the weft insertion device of FIG. 2, in which the operation of the weft braking device is explained; and Fig. 7 is a schematic plan view of a weft yarn braking device of a weft insertion device according to a second embodiment of the present invention.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
    Hereinafter, a weft insertion device of an air jet loom according to the first embodiment is described with reference to FIGS. 1 to 6. frame is generally designated by the reference numeral 1 in FIG. 1. In the following description, the terms "upstream" and "downstream" designate directions with respect to the direction of movement or theft of a wire. weft in the air jet loom, unless specifically indicated otherwise. Referring to FIG. 1, the weft insertion device 1 includes a weft insertion nozzle 2, a first tandem nozzle 3 provided upstream of the weft insertion nozzle 2, a second tandem nozzle 4 provided upstream of the first tandem nozzle 3 at a distance therefrom, and several groups of auxiliary nozzles 5 provided downstream of the weft insertion nozzle 2.
    Referring to FIGS. 1 and 2, the weft insertion nozzle 2 and the auxiliary nozzle groups 5 are provided on a flap 6 of the air jet loom and are subjected to a reciprocating oscillating motion. back forward and vice versa. The first tandem nozzle 3 and the second tandem nozzle 4 are attached to a frame (not shown) of the air jet loom or to a support which is attached to a floor (not shown). A weft braking device 7 is provided between the first tandem nozzle 3 and the second tandem nozzle 4 for braking a weft yarn Y at a suitable time that can be adjusted.
    The weft insertion nozzle 2, the first tandem nozzle 3 and the second tandem nozzle 4 are connected to valves 8, 9, 10 respectively via tubes 11. In the present description, the tubes for feeding water to compressed air are all designated by the reference numeral 11. The valves 8 to 10 are connected to a main tank 12 via the common tube 11 and can be actuated to inject compressed air from the insertion nozzle. weft yarn, the first tandem nozzle 3 and the second tandem nozzle 4, at suitable times that can be adjusted. The main tank 12 which stores compressed air conveyed from an air supply source is connected to the air supply source (not shown) such as a compressor via a filter of 13, a pressure gauge 14, a pressure regulating valve 15 and via the tubes 11. The valves 8 to 10 are open and closed to allow their corresponding nozzles to inject air and to stop the injection of air , according to start and end times of insertion of weft thread.
    Furthermore, each group of auxiliary nozzles 5 has a common valve 16 and the auxiliary nozzles 5 in the same group are connected to the valve 16 via the tube 11. The valves 16 of the respective groups are connected to a common subsidiary reservoir 17 via the tube 11. The subsidiary tank 17 which stores compressed air is connected to the aforementioned air supply source (not shown) via a pressure regulating valve 18 which is connected to the tube 11 extending between the valve 15 and the pressure gauge 14. The valves 16 are opened and closed in relay at predetermined times during the insertion of weft thread, so that compressed air is injected from the nozzles respective auxiliaries 5 of the same group, in relay.
    Referring to FIG. 2, in which polychromatic weft insertion devices IA, IB are shown in a schematic plan view, the polychrome weft insertion devices IA, IB can be actuated for inserting weft yarns Y1, Y2 alternately or in accordance with any programmed weft insertion sequence. The weft yarns Y1, Y2 may be different from one another or they may be of the same type. Since the weft insertion devices 1A, 1B have essentially the same structure, the description of the weft insertion device can focus only on the weft insertion device IA.
    As shown in FIG. 2, the weft insertion nozzles 2A, 2B, respective weft insertion devices IA, IB, are juxtaposed and are held in a support 19 which is fixed to the wing 6. The first tandem nozzles 3A, 3B, the weft braking devices 7A, 7B and the second tandem nozzles 4A, 4B of the weft insertion devices IA, IB are attached to a stud (not shown) which is provided on the floor so that the downstream ends of the first tandem nozzles 3A, 3B, the weft braking devices 7A, 7B and the second tandem nozzles 4A, 4B are oriented toward the weft insertion nozzles 2A, 2B, respectively.
    Weft yarn feed 20A for yarn Y1, weft yarn storage device 21A and weft yarn guide 22A are provided upstream of second tandem nozzle 4A in this order. Similarly, weft yarn feed 20B for weft yarn Y2, weft yarn storage device 21B and weft yarn guide 22B are provided upstream of second tandem nozzle 4B in this order. The weft yarns Y1, Y2 are pulled out of the weft feeds 20A, 20B and stored temporarily in the weft storage devices 21A, 21B, respectively. The weft yarns Y1, Y2 stored in the weft storing devices 21A, 21B are introduced into the second tandem nozzles 4A, 4B via the weft guides 22A, 22B, and then into the first tandem nozzles 3A, 3B via the weft braking devices 7A, 7B and beyond in the weft insertion nozzles 2A, 2B, respectively. The weft yarns Y1, Y2 are inserted into a shed (not shown) from weft inserting nozzles 2A, 2B at set times that can be adjusted, respectively.
    Hereinafter, the first and second tandem nozzles 3A, 4A and their related elements of the weft insertion device IA will be described with reference to FIGS. 3 to 6. As indicated above, the devices of FIG. insertion of weft yarn IA, IB have substantially the same structure, so that only the weft insertion device IA will be described below with reference to FIGS. 3 to 6 and the description of the description will be omitted. weft insertion device IB. As indicated in FIGS. 3 and 4, the first tandem nozzle 3A includes a support 25, a first acceleration tube 23 which is supported by the support 25 on its downstream side, a weft yarn input 24 which is also supported by the carrier 25 on its upstream side and a weft yarn outlet 26. The weft yarn inlet 24 and the weft yarn outlet 26 are provided at the opposite ends of the first acceleration tube 23 and consist of an ceramic material to prevent wear of the weft yarn as it moves through the acceleration tube 23 by contact with the weft yarn inlet 24 and the weft yarn outlet 26. The second tandem nozzle 4A which is provided upstream of the first tandem nozzle 3A at a distance therefrom includes a support 29, a second acceleration tube 27 which is supported by the carrier 29 on its downstream side, a weft entry 28 which is also supported by the support 29 on its upstream side and a weft yarn outlet 30. The weft yarn inlet 28 and weft yarn outlet 30 which are provided at the opposite ends of the second acceleration tube 27 are made of a ceramic material .
    A hook 31 is secured to the carrier 25 of the first tandem nozzle 3A by bolts 32. The weft braking device 7A includes a weft guide 33 and a stepper motor 34 which are both secured to the hook 31. The weft thread guide 33 is provided substantially in the center between the weft yarn inlet 24 of the first tandem nozzle 3A and the weft yarn outlet 30 of the second acceleration tube 27 of the second tandem nozzle 4A. As indicated in FIGS. 2 and 3, the first tandem nozzle 3A, the second tandem nozzle 4A and the weft guide 33 are arranged coaxially on the X axis so that a straight passage is obtained for the weft yarn Yl. In the present description of the invention, the term "passage for the weft thread" designates a passage along which a weft thread passes.
    Referring to FIGS. 3, 6A and 6B, a motor shaft holder 37 having a U-shaped brake lever 36 is attached to a motor shaft 35 of the stepper motor 34. In particular, the brake lever 36 is arranged such that the leg-shaped portions of the U-portion of the brake lever 36 are arranged between the weft yarn inlet 24 and the weft yarn guide 33 and between the weft yarn outlet 30 and the weft guide 33, respectively. A stop 43 is attached to the hook 31 at a location above the brake lever 36. The stepper motor 34 rotates the motor shaft bracket 37 causing the brake lever 36 to pivot on the shaft. The brake lever 36 is normally placed in a rest position (as indicated by a solid line in FIG. 6A) and pivots downward on the X axis to assume a working position (as indicated by the line). dashed and double-chain in FIG. 6A) when the stepping motor 34 is active. Further, the weft yarn input 24 and the weft yarn output 30 also serve as weft yarn guide upstream and downstream for the weft yarn braking device 7A, respectively, so that the space required for mounting the weft braking device 7A is reduced.
    As shown in FIG. 4, the support 25 of the first tandem nozzle 3A and the support 29 of the second tandem nozzle 4A are connected to one another by two connectors 38, 39 arranged one above the other . The connectors 38, 39 enable the first tandem nozzle 3A, the weft guide 33 of the weft braking device and the second tandem nozzle 4A to be disposed coaxially on the X axis with a large diameter. precision. Thus, the first tandem nozzle 3A, the weft braking device 7A and the second tandem nozzle 4A can be integrated as a single unit, so that the weft insertion device IA can be mounted in the machine. air-jet weaving machine with ease and with great precision.
    Hereinafter, the weft insertion nozzle 2A, the first tandem nozzle 3A and the second tandem nozzle 4A will be described in more detail for comparison purposes with reference to FIG. 5. The insertion nozzle weft yarn 2A includes a weft yarn inlet 40, a third acceleration tube 41 and a weft yarn outlet 42 formed at the downstream end of the third acceleration tube 41. Weft yarn inlet 40 and the weft yarn outlet 42 are made of a ceramic material.
    Referring to FIG. 5, LI, L2 and L3 represent the length of the third acceleration tube 41 of the weft insertion nozzle 2, the length of the first acceleration tube 23 for the first tandem nozzle 3A. and the length of the second acceleration tube 27 for the second tandem nozzle 4A, respectively, L1 being less than L2, L1 being greater than L3 and therefore L3 being less than L2. Although the compressed air is fed from the same main tank 12 (as can be seen in FIG. 1), the force exerted on the weft yarn to fly in the second tandem nozzle 4A can be rendered less than the pressures exerted on the weft yarn to fly in the weft insertion nozzle 2A and in the first tandem nozzle 3A by making the length L3 of the second acceleration tube 27 of the second nozzle tandem 4A less than L1 and L2. The length L2 of the first acceleration tube 23 of the first tandem nozzle 3A may be equal to or less than the length L1 of the third acceleration tube 41 of the weft insertion nozzle 2A.
    Therefore, the air consumption is reduced and the supply of an excessive length of weft yarn Y1 to the weft yarn inlet 24 of the first tandem nozzle 3A is also prevented, so that it is prevented a collapse of the yarn Y1 between the first tandem nozzle 3A and the second tandem nozzle 4A and the yarn Y1 is provided with the desired tension, so that the weft yarn Y1 is transported smoothly. The second tandem nozzle 4A has the function of sucking a weft yarn Y1 from the weft storing device 21A to thereby reduce the tensile strength of the weft yarn Y, thereby reducing the load on the yarn. first tandem nozzle 3A and the weft insertion nozzle 2A, the consequence being that it reduces the consumption of air. In addition, the shortened length of the second acceleration tube 27 of the second tandem nozzle 4A makes it possible to prevent an increase in the mounting surface of the weft insertion device IA.
    Referring to FIG. 5, it can be seen that the internal diameter DI of the third acceleration tube 41 of the weft insertion nozzle 2A is substantially identical or approximately identical to the internal diameter D2 of the first acceleration tube 23 of the first tandem nozzle 3A. The internal diameter D2 of the first acceleration tube 23 of the first tandem nozzle 3A is greater than the internal diameter D3 of the second acceleration tube 27 of the second tandem nozzle 4A. The combination of the reduction of the internal diameter D3 of the second acceleration tube 27 and the shortened length of the second acceleration tube 27 contributes to facilitating the adjustment of the force for the weft flight Y1 in the second tandem nozzle 4A to reach a lower optimal value.
    Hereinafter, the operation of the weft braking device 7A will be described with reference to FIG. 6. In the rest state of the weft braking device 7A, the brake lever 36 comes into contact with stop 43 in the rest position indicated by the solid line in Figs. 6A, 6B. When the stepping motor 34 (as can be seen in FIG. 3) is activated at a given moment during the insertion operation of the weft thread, the brake lever 36 pivots on the motor shaft 35 in the direction of the working position indicated by the double-chain dashed line, so that the brake lever 36 pushes down the weft yarn Y1 between the weft yarn inlet 24 of the first tandem nozzle 3A and the weft yarn outlet 30 of the second tandem nozzle 4A. In particular, weft yarn Y1 is pushed down at a location between weft thread guide 33 and weft thread entry 24 and a location between weft thread guide 33 and the weft exit. weft thread 30 to take a W configuration as indicated by the double-chain dashed line (as can be seen in FIG. 6B) and undergoes a braking action.
    The weft insertion device 1 according to the first embodiment implements a weft insertion in the manner as described below. When a weft yarn Y1 is selected for a weft insertion during the weaving operation of the air jet loom, the valves 8 to 10 are actuated to allow the insertion nozzle to 2A weft yarn, the first tandem nozzle 3A and the second tandem nozzle 4A to inject compressed air at fixed times that can be set. When the weft stub stitch (not shown) releases weft yarn Y in the weft storing device 2 IA, the stored Y1 weft yarn is pulled out by the second tandem nozzle 4A. The second tandem nozzle 4A supports a major part of the tensile strength of the weft Y yarn outside the weft yarn storage device 21A, so that the second tandem nozzle 4A produces a force to transport the weft yarn Y lower than that of the first tandem nozzle 3A.
    The first tandem nozzle 3A, which does not have to withstand the pulling of weft yarn Y outside the weft storing device 21A, can use most of its jet force of Thus, the weft yarn Y extracted by the second tandem nozzle 4A is transported in the direction of the weft insertion nozzle 2A by the air jet force which is reinforced by the first acceleration tube 23 of the first tandem nozzle 3A. The weft yarn Y emerging from the first tandem nozzle 3A receives an air jet force later in the weft insertion nozzle 2A to be able to fit into an open shed (not shown). Thus, the air jet force in the first tandem nozzle 3A and the weft insertion nozzle 2A is used mainly for the flight of the weft yarn Y, so that a high speed insertion of the yarn Y weft can be obtained in the air jet loom.
    When the weft yarn Y is broken or when a new fabric is mounted in the air jet loom, a weft yarn Y1 must be threaded through the weft insertion device IA. The weft insertion device IA according to the first embodiment is configured such that the passage for the weft yarn Y1 extends in a linear direction along the X axis through the first tandem nozzle 3A. , the weft braking device 7A and the second tandem nozzle 4A. Therefore, it is sufficient to place one end of the weft yarn Y1 near the weft thread inlet 28 of the second tandem nozzle 4A and to allow compressed air to supply the second tandem nozzle 4A, so that the weft yarn Y1 can move in the weft straight passage and reach the weft yarn outlet 36 of the first tandem nozzle 3A under the influence of the air jet. Thus, the threading of a weft thread through the second and the first tandem nozzle 4A, 3A can be implemented in a single operation. The weft yarn Y that reaches the weft yarn outlet 26 of the first tandem nozzle 3A can be inserted into the weft inserting nozzle 2A by placing the leading end of the weft yarn Y close to the yarn Weft yarn input 40 from weft yarn insertion nozzle 2A and allowing compressed air to feed the weft yarn insertion nozzle 2A. Thus, the threading of a weft yarn Y through the weft insertion device IA comes to an end.
    Hereinafter, the weft insertion device according to the second embodiment will be described with reference to FIG. 7. The second embodiment differs from the first embodiment in the arrangement of the braking of weft thread. The same reference numerals will be used to denote the components or elements that correspond to those of the first embodiment, and their description will therefore be omitted. In the second embodiment, the weft braking device which is designated by the reference numeral 44A is disposed upstream of the second tandem nozzle 4A. A hook 45 which serves as a support member for the weft braking device 44A is fixed to the support 29 of the second tandem nozzle 4A by bolts 46 and an L-shaped hook 47 is attached to the hook 45 by bolts. 48. The hooks 45, 47 cooperate to form a U-shaped hook.
    A stepping motor 49 forming part of the weft braking device 44A is attached to the hook 45 by the fastening device such as a bolt (not shown). A stop 50 is attached to the hook 45 by a bolt 51 and a weft guide 52 is disposed upstream of the second tandem nozzle 4A while being attached to the hook 45 via a support member (not shown). As was the case in the first embodiment, a motor shaft support 55 which has a U-shaped brake lever 54 is attached to a motor shaft 53 of the stepper motor 49. When the motor 4 9 is actuated at a given moment during the weft insertion operation and rotates the motor shaft support 55, the brake lever 54 pivots on the motor shaft 53 as its rest position in which the stop 50 prevents the brake lever 54 from moving upwards to its working position in which it is below the weft guide 52.
    A threading nozzle 56 is attached to the U-shaped hook 47 at a location upstream of the weft guide 52. The threading nozzle 56 has, at its downstream end, a weft yarn exit 57 and its upstream end, a weft yarn inlet 58. The weft yarn outlet 57 and the weft yarn inlet 58 are made of a ceramic material. The threading nozzle 56 is connected to a tube 11 through which compressed air can be conveyed from the main reservoir 12 (as can be seen in Figure 1) through a valve (not shown).
    A passage for the weft yarn extending through the second tandem nozzle 4A, the weft braking device 44A and the threading nozzle 56 extends in a linear direction along the X axis. when a weft yarn Y is placed near the weft thread inlet 58 of the threading nozzle 56 and when compressed air is conveyed to the threading nozzle 56 through the tube 11, threading yarn Y through weft braking device 44A and second tandem nozzle 4A can be performed without difficulty. Further, the weft yarn outlet 57 of the threading nozzle 56 and the weft yarn inlet 28 of the second tandem nozzle 4A act as weft yarn guide upstream and downstream for the braking device. weft yarn 44A, respectively, so that the space required for mounting the weft braking device 44A is minimized. In addition, the second tandem nozzle 4A, the weft braking device 44A and the threading nozzle 56 are mounted on the hook 45 and on the L-shaped hook 47 to form a single unit, so that the second nozzle tandem 4A, the weft braking device 44A and the threading nozzle 56 can be positioned coaxially in the weft insertion device without difficulty.
    When the first tandem nozzle 3A (which is not shown in FIG. 7) is disposed in a coaxial position with the X axis, the threading of a weft thread through the second and the first tandem nozzle 4A, 3A can be achieved in one operation. In the second embodiment, the weft braking device 44A and the threading nozzle 56 may be provided separately from the second tandem nozzle 4A.
    The present invention is not limited to the above-mentioned embodiments and can be implemented in various ways as illustrated below by way of example. (1) In the first embodiment, the weft braking devices 7, 7A, 7B can be provided separately with respect to the first tandem nozzles 3, 3A, 3B so as to be arranged between the first tandem nozzles 3 , 3A, 3B and the second tandem nozzles 4, 4A, 4B, respectively. In addition, a separate weft guide may be provided with at least one number corresponding to a downstream position and a position upstream of the weft braking device 7, 7A, 7B in addition to the thread exit of frame 30 of the second tandem nozzle 4, 4A, 4B or the weft yarn inlet 24 of the first tandem nozzle 3, 3A, 3B. (2) The passage for the weft yarn extending through the first tandem nozzles 3, 3A, 3B, the weft braking devices 7, 7A, 7B and the second tandem nozzles 4, 4A, 4B are not not necessarily brought into reciprocal alignment along the straight axis X: the passage for the weft thread may be curved. (3) In the first embodiment, the third acceleration tube 41 of the weft insertion nozzle 2, 2A, 2B and the first acceleration tube 23 of the first tandem nozzle 3, 3A, 3B are made in the form of a straight tube having a constant internal diameter, but at least one of the third and the first acceleration tubes 41, 23 may be in the form of a diverging tube whose internal diameter increases towards 1 downstream so as to increase the force of the air jet. (4) In the first embodiment, the valves 8 to 10 can be replaced by a single valve so that the compressed air is injected at the same time from the weft insertion nozzle 2, 2A , 2B, the first tandem nozzle 3, 3A, 3B and the second tandem nozzles 4, 4A, 4B. (5) The stepper motors 34, 49 in the first and second embodiments may be replaced by a servomotor or any other type of motor whose operating state can be adjusted.
    权利要求:
    Claims (6)
    [1]
    A weft inserting device (1, 1A, 1B) of an air jet loom comprising: a weft feed (20A, 20B); a weft yarn storage device (21A, 21B); a wing (6); a weft insertion nozzle (2) provided on the leaf (6); a first tandem nozzle (3, 3A, 3B) provided upstream of the weft insertion nozzle (2) and having a first acceleration tube (23); and a second tandem nozzle (4, 4A, 4B) provided upstream of the first tandem nozzle (3, 3A, 3B) and having a second acceleration tube (27), characterized in that the second acceleration tube ( 27) of the second tandem nozzle (4, 4A, 4B) is shorter than the first acceleration tube (23) of the first tandem nozzle (3, 3A, 3B).
    [2]
    Weft insertion device (1, IA, IB) of an air jet loom according to claim 1, characterized in that the internal diameter of the second acceleration tube (27) of the second tandem nozzle (4, 4A, 4B) is smaller than that of the first acceleration tube (23) of the first tandem nozzle (3, 3A, 3B).
    [3]
    A weft inserting device (1, 1A, 1B) of an air jet loom according to any one of claims 1 and 2, wherein a weft yarn (Y, Y1, Y2) passes through the first tandem nozzle (3, 3A, 3B) and the second tandem nozzle (4, 4A, 4B), and a weft thread passage along which the weft yarn (Y, Y1, Y2) is formed, the weft inserting device (1, IA, IB) further comprising: a weft yarn braking device (7, 7A, 7B) provided between the first tandem nozzle (3, 3A, 3B) and the second tandem nozzle (4, 4A, 4B) and through which the weft thread (Y, Y1, Y2) passes, characterized in that the first tandem nozzle (3, 3A, 3B), the braking device of weft yarn (7, 7A, 7B) and the second tandem nozzle (4, 4A, 4B) are arranged in a coaxial position, so that the passage for the weft yarn (Y, Y1, Y2) extends in the direction linear through the first tandem nozzle (3, 3A, 3B), the braking device of weft yarn (7, 7A, 7B) and the second tandem nozzle (4, 4A, 4B).
    [4]
    A weft inserting device (1, 1A, 1B) of an air jet loom according to claim 3, wherein the first tandem nozzle (3, 3A, 3B) includes an inlet of weft yarn (24), the second tandem nozzle (4, 4A, 4B) includes a weft yarn outlet (30), and the weft yarn braking device (7, 7A, 7B) includes a yarn guide weft (24, 30, 33), characterized in that the weft yarn braking device (7, 7A, 7B) is attached to the first tandem nozzle (3, 3A, 3B), the yarn entry weft (24) and the weft yarn outlet (30) each acting as weft yarn guide (24, 30) for the weft yarn braking device (7, 7A, 7B).
    [5]
    Weft insertion device (1, 1A, 1B) of an air jet loom according to one of Claims 1 to 4, characterized in that the thread insertion device frame (1, IA, IB) further includes: a connector (38, 39) connecting the first tandem nozzle (3, 3A, 3B) and the second tandem nozzle (4, 4A, 4B) to each other ).
    [6]
    A weft insertion device (1, 1A, 1B) of an air jet loom according to any one of claims 1 and 2, wherein a weft yarn (Y, Y1, Y2) passes through the first tandem nozzle (3, 3A, 3B) and the second tandem nozzle (4, 4A, 4B), and a weft thread passage along which the weft yarn (Y, Y1, Y2) is formed, the weft inserting device (1, IA, IB) further comprising: a weft yarn braking device (44A) provided upstream of the second tandem nozzle (4, 4A, 4B) and through which the weft thread (Y, Y1, Y2) passes; and a threading nozzle (56) provided upstream of the weft braking device (44A) and through which the weft yarn (Y, Y1, Y2) passes, characterized in that the threading nozzle ( 56), the weft braking device (44A) and the second tandem nozzle (4, 4A, 4B) are arranged in a coaxial position, so that the passage for the weft yarn (Y, Y1, Y2) is extends in a linear direction through the threading nozzle (56), the weft braking device (44A) and the second tandem nozzle (4, 4A, 4B).
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    同族专利:
    公开号 | 公开日
    JP2013060686A|2013-04-04|
    CN103103686B|2015-11-25|
    JP5321662B2|2013-10-23|
    CN103103686A|2013-05-15|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2011200049A|JP5321662B2|2011-09-14|2011-09-14|Weft insertion device for air jet loom|
    JP2011200049|2011-09-14|
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