• 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 method of controlling the insertion of a weft yarn into a loom which includes: a multitude of main nozzles disposed side by side in the front-to-back direction; a comb disposed downstream of the main nozzles and mounted on a leaf; and a multitude of secondary nozzles arranged along the passage for the insertion of the frame wire. The comb has a recessed passage for inserting the weft thread. The secondary nozzles include a first secondary nozzle which represents the nozzle closest to the main nozzles and a multitude of second secondary nozzles. The method further encompasses adjusting an injection pressure of the first secondary nozzle, lower than the injection pressures of the second secondary nozzles when the insertion of the weft yarn is carried out at least via one of the main nozzles which represents the process. nozzle closest to a pick clamp line.
    公开号:BE1023553B1
    申请号:E2016/5165
    申请日:2016-03-07
    公开日:2017-05-02
    发明作者:Yoichi Makino；Shinji Takagi；Masanobu Sakai；Toshiya Inagaki
    申请人:Kabushiki Kaisha Toyota Jidoshokki；
    IPC主号:
    专利说明:

    METHOD FOR CONTROLLING THE INSERTION OF A FRAME WIRE AND DEVICE FOR INSERTING FRAME WIRE IN A WEAVING
    AIR JET TYPE
    BASIS OF THE INVENTION
    The present invention relates to a method for adjusting the insertion of a weft yarn and a weft insertion device in an air jet type loom. EP0114047 discloses a method and apparatus for selectively inserting a plurality of weft yarns through a warp shed into an air jet loom having nozzles for ejecting pressurized air along the shed characterized by ejecting air with a respective predetermined pressure corresponding to the selected weft yarn and ejecting air from at least one of a plurality of auxiliary nozzles with a predetermined pressure corresponding to the selected weft thread.
    An air jet loom in which a weft yarn is inserted by air injected from a main weft insertion nozzle into a yarn insertion passageway is known. weft which is formed at the front of the comb and in which the weft yarn is transported successively with the aid of the injected air from a multitude of auxiliary weft insertion nozzles which are arranged in respecting a specified interval along the weft insertion path. In an air jet type loom having a plurality of main nozzles, the main nozzles are arranged at different angles from each other relative to the surface of the bottom wall of the wire insertion passage. frame.
    In Japanese Unexamined Patent Application Publication No. H02-41440, a weft insertion device is disclosed in a jet type loom which includes a main weft insertion nozzle which is arranged to be oriented towards the surface of the bottom wall of the weft insertion passage, and a first weft insertion auxiliary nozzle which is disposed adjacent to the main nozzle of insertion of weft thread. The weft insertion effect of the main weft insertion nozzle is relayed by the first weft insertion auxiliary nozzle. In the weft insertion device of the publication in question, the transport force in the effective weft insertion zone of the first weft insertion auxiliary nozzle is set to be greater than the forces in the effective weft insertion areas of any other weft insertion auxiliary nozzle. Specifically, in an arrangement consisting of a plurality of weft insertion auxiliary nozzles and which includes a first weft insertion auxiliary nozzle which is disposed within a specified interval along the insertion passage. a weft yarn insertion auxiliary auxiliary nozzle is disposed adjacent the first weft insertion auxiliary nozzle which is disposed adjacent to the weft insertion weft passage; that is to say on the side of the main nozzle. In this way, the weft conveyor effect is enhanced in the effective weft transport area of the first weft insertion auxiliary nozzle. Accordingly, even in the case in which a weft yarn is brought into contact with the surface of the bottom wall of the weft insertion passage and experiences resistance, the transport force which is necessary for the insertion of weft weft thread is guaranteed.
    In accordance with the weft insertion device disclosed in Japanese Unexamined Patent Application Publication No. H02-41440, an additional auxiliary weft insertion nozzle is disposed adjacent to the first nozzle. insertion of weft thread insertion so as to reinforce the transport effect of the weft thread. However, in an air jet type loom having a plurality of main nozzles for multi-color weaving, the weft yarn may be deviated from the weft insertion passage depending on the arrangement. main nozzles. In particular, a weft yarn which is inserted by the air injected by the main nozzle which is disposed on the side of the draw line or which is closest to the side of the draw line of the loom. is away from the comb tends to deflect easily. It is believed that such a deviation occurs because the air injected from the main nozzle disposed on the side of the draw clamp line and therefore at a relatively large angle to the lower surface of the transition passage. insertion of the weft yarn merges with the air injected by the first weft insertion auxiliary nozzle, this air melting guides the inserted weft yarn towards the open side of the weft insertion weft insertion passage i.e., on the side of the pick-up line, with the result that the inserted weft yarn is easily deflected with respect to the weft inserting passage.
    The object of the present invention is to provide a method for controlling or adjusting the insertion of weft yarn in an air jet type loom and a weft insertion device in the loom. weaving which is capable of preventing a deflection of the inserted weft yarn with respect to the weft insertion passage.
    SUMMARY OF THE INVENTION
    In accordance with one aspect of the present invention, there is provided a method for controlling or adjusting the insertion of a weft yarn into an air jet type loom including a multitude of main nozzles which are arranged. side-by-side in the front-to-back direction of the air jet type loom; a comb which is disposed downstream of the main nozzles relative to the weft insertion direction of the air jet type loom and is mounted on a leaf; and a plurality of secondary nozzles which are disposed along the insertion passage of the weft yarn. The comb has, in its front or front surface, a hollow insertion passage of weft thread. The secondary nozzles include a first secondary nozzle that represents the nozzle closest to the main nozzles and a plurality of second secondary nozzles that do not represent the nozzles closest to the main nozzles. The method for controlling or adjusting the insertion of the weft yarn into the air jet type loom further includes adjusting an injection pressure of the first secondary nozzle to obtain a lower pressure. at the injection pressures of the second secondary nozzles, when the insertion of weft yarn is carried out at least by one of the main nozzles which represents the nozzle closest to a picking line.
    In accordance with another aspect of the present invention, a weft insertion device is provided in an air jet type loom including a plurality of main nozzles which are arranged side by side in the forward direction. back of the air jet type loom; a comb which is disposed downstream of the main nozzles relative to the weft insertion direction of the air jet type loom and is mounted on a leaf; a plurality of secondary nozzles which are disposed along the insertion passage of the weft yarn; and a multitude of secondary valves which are connected to the secondary nozzles. The comb has, in its front or front surface, a hollow insertion passage of weft thread. The secondary nozzles include a first secondary nozzle that represents the nozzle closest to the main nozzles and a plurality of second secondary nozzles that do not represent the nozzles closest to the main nozzles. The secondary nozzles are grouped into a multitude of groups. The secondary valves include a first secondary valve and a plurality of second secondary valves and the first secondary nozzle is connected to the first secondary valve. The groups of the second secondary nozzles are connected to the respective second secondary valves. Each group of secondary nozzles is connected to a first secondary tank via the corresponding second secondary valve. The weft insertion device includes a control device which controls the first secondary valve and the second secondary valves and when the insertion of the weft yarn is implemented, at least by one of the nozzles. which represents the nozzle closest to a pick-up line, the control device controls the first secondary valve so as to obtain an injection pressure of the first secondary nozzle which is lower than the injection pressures of the second secondary nozzles. 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
    Fig. 1 is a schematic perspective view showing a configuration of a weft insertion device in an air jet type loom according to a first embodiment of the present invention; Fig. 2 is a fragmentary plan view showing the operation of the weft insertion device in the air jet type loom of Fig. 1; Fig. 3 is a block diagram showing the duct connection for air of the weft insertion device of Fig. 1; Fig. 4 is a block diagram showing a control flow of the weft insertion device in the air jet type loom of Fig. 1; Fig. 5 is a graph showing the change over time of the pressure of a secondary nozzle of the weft insertion device in the air jet type loom of FIG. 1; and Fig. 6 is a schematic diagram showing the conduit connection of a weft insertion device in an air jet type loom according to a second embodiment of the present invention. invention. DETAILED DESCRIPTION OF THE EMBODIMENTS First embodiment
    A weft insertion device in an air jet type loom according to a first embodiment of the present invention will now be described with reference to FIGS. 1 to 5. Referring to FIG. 1, reference numeral 10 generally designates a weft insertion device in an air jet type loom including a group of main nozzles 11 which includes a plurality of main nozzles 11A to 11F, a nozzle holding device 12 which holds the main nozzle group 11 and a main support 14 which is attached to a leaf 13 of the air jet type loom. In the context of the description, the direction in which the leaf 13 extends and which is represented by a double headed arrow with the LEFT and RIGHT indications in FIG. 1 represents the direction in width and the direction which is perpendicular to the direction in which the leaf 13, represented by a double headed boom with the FRONT and REAR indications, represents the front-to-back direction of the air jet type loom, respectively. In the air jet type loom, the woven fabric is wound on the front side of the air jet type loom and the warp yarns are unwound towards the back side of the loom. of the air jet type.
    The main nozzle group 11 is held by the nozzle holding device 12 which is disposed at the left end of the leaf 13. A single weft thread is conveyed to each of the main nozzles 11A to 11F, and a total of six threads weft are inserted from the six main nozzles 11 of the group. Three main nozzles 11 A, 1 IB and 1 IC are arranged side by side in the front-to-back direction of the air jet type loom in an arrangement such that the main nozzle 11A is disposed on the rear side, the main nozzle 11B is disposed in the middle and the main nozzle 11C is disposed on the front side of the air jet type loom, respectively. Of the three main nozzles 11A-11C, the main nozzle 11C represents the nozzle closest to the weaving line of a woven fabric (not shown) on the front side of the weaving loom. with air jet. As shown in FIG. 2, the main nozzles 11A to 11C are arranged in such a way that they extend converging towards a weft insertion passage 21 which will be the subject of further explanations. The three remaining nozzles 11D, 11E and 11F are arranged in such a way that they extend below the respective main nozzles 1A1, 1IB and 11C in the same front-to-back direction of the press-type loom. air jet in such a way that the main nozzle 11D is disposed on the back side, the main nozzle 11E is disposed in the middle and the main nozzle 11F is disposed on the front side of the jet type loom; air, respectively. Of the three main nozzles 11D to 11F, the main nozzle 11F represents the nozzle closest to the weaving line of a woven fabric (not shown) on the front side of the weaving loom. air jet. The main nozzles 11D, 11E and 11F are also arranged in such a way that they extend converging towards a weft insertion passage 21.
    The main support 14 includes the aforementioned nozzle holding device 12 which holds the main nozzles 11A to 11F and a mounting portion 16 extending from the nozzle holding device 12 in the longitudinal direction (or in the direction of width) of the leaf 13. The nozzle holding device 12 and the mounting portion 16 are made in one piece. The mounting portion 16 is inserted into a mounting groove 13A formed in the leaf 13 and is attached to the leaf 13 with bolts (not shown).
    The nozzle holding device 12 has a configuration essentially reminiscent of a rectangular parallelepiped and the main nozzles 11A to 11F extend to the right with respect to the straight vertical surface of the nozzle support device 12. As can be seen in FIG. As seen in FIG. 2, six guide holes 17 are made through the nozzle holding device 12, through which the weft yarns Y are passed to the main nozzles 1A-11F. The weft yarns Y are conveyed by a weft feeder (not shown) to the respective main nozzles 11A-11F. Conduits 29 are connected to the left end portion of the main nozzle holding device 12 in such a way that the conduits 29 are brought into communication with the main nozzles 11A to 11F via the nozzle holding device 12 to feed the main nozzles 12 compressed air the respective main nozzles 11A to 11 F. The weft yarns Y conveyed to the main nozzles 11A to 11F through the guide holes 17 scroll to the right in the main nozzles 11A to 11F under the influence of compressed air provided by conduits 29.
    A comb 15 is mounted on the leaf 13 in such a manner that the comb 15 extends in upright position on the right side of the main nozzles 11A to 11 F. The comb 15 includes a multitude of comb teeth 15A each having a recessed portion 15B which is open on the front of the jet loom. The comb teeth 15A are disposed in the width direction of the air jet type loom and the recessed portions 15B of the comb teeth 15A cooperate to form the aforementioned weft insertion passage 21 through which an inserted weft yarn Y is transported. The weft insertion passage 21 is made in such a way that it extends in the width direction of the comb 15. In FIGS. 1 and 2, the reference numeral 20 designates the lower wall surface of the recessed portion 15B of each comb tooth 15A and then also the lower wall surface of the weft insertion passage 21 which is the deepest relative to the opening of the recessed portion 15B of each comb tooth 15A or with respect to the opening of the insertion passage 21 of the weft thread, as appropriate. The main nozzles 11 to 11 are arranged in such a manner that they are oriented toward the lower wall surface 20 of any specific comb tooth 15A or towards the lower wall surface 20 of the passage 21. insertion of the weft thread. The comb 15 is inserted into the mounting groove 13A of the leaf 13 and is fixed thereto by means of a wedge 19.
    The lines P1, Q1 and R1, as shown in FIG. 2, indicate the flow axes of the air injected from the respective main nozzles 11A, 11B and 11C, as well as their directions. The air flow axes PI, Q1 and RI are oriented in such a way that the angles of incidence Θ1, Θ2 and Θ3 formed between the air flow axes PI, Q1 and RI and the lower wall surfaces 20 of the comb teeth 15A are different from each other, Θ1 representing the smallest angle, Θ3 representing the largest angle and Θ2 representing an intermediate angle between Θ and Θ3 (that is, Θ1 < Θ2 <Θ3). The lower main nozzles 11D, 11E and 11F are disposed directly below their corresponding upper main nozzles 11A, 11B and 1CI. Therefore, the directions of extension of the flow axes of the air injected from the lower main nozzles 11D to 11F are essentially identical to the directions of extension of the flow axes of the air injected from the main nozzles higher 11A to 1 IC. The angle of incidence Θ3 is greater, since the main nozzle is further away from the comb 15. In other words, the angle of incidence Θ3 of the main nozzles 1 IC and 11F which are furthest from the comb and the closest to the pick line is the largest of the three angles of incidence.
    As shown in Figures 2 and 3, a plurality of secondary nozzle groups 25A-25G, each including one or a plurality of secondary nozzles, are mounted on the leaf 13 on the front surface thereof. The secondary nozzles 25A-25G are disposed within a specified interval along the weft insertion passage 21. As shown in FIG. 1, each of the secondary nozzles 25A-25G is held at its proximal end by a support block 22 and the distal end of the nozzle is oriented towards the insertion passage 21 of the weft thread. The support block 31 is fixed to a guide groove 23 formed on the front face of the leaf 13, via a bolt 14 and a nut (not shown).
    The air duct connection of the weft insertion device 17 in the air jet type loom will now be described with reference to the block diagram of FIG.
    The weft insertion device 10 includes an air supply source 26 which is connected to an on / off valve 28 via a conduit 27. The start / stop valve 28 supplies compressed air and stops the supply of compressed air selectively. The start / stop valve 28 is connected to a filter 30 via a conduit 29 which is provided on the side of the jet loom and which is connected to a pressure gauge 31. The pressure gauge 31 measuring the pressure of the compressed air that is conveyed from the air supply source 26. The pressure gauge 31 is connected to a main regulator 32 and then a main reservoir 33 via the conduit 29. The main regulator 32 regulates the pressure of the compressed air conveyed from the air supply source 26 to a pressure which is suitable for the insertion of the weft yarn and the compressed air set or reduced at such pressure is stored in the main reservoir 33. The main reservoir 33 is connected to the main nozzles 11 via the conduit 29 and via six main valves 34. Although it is not shown in the drawing, each of the six main nozzles 11A to 11F is connected. at each of The compressed air in the main tank 33 is conveyed to the main nozzles 11 via the main valve 34, which is then activated for the insertion of the weft yarn in such a way that an insertion is carried out. A conduit 35 bifurcates with respect to the conduit 29 between the pressure gauge 31 and the main regulator 32 and is connected via a throttle valve 36 to the conduit 29 between the main valve 34 and the control group. main nozzles 11 to thereby obtain a breeze circuit which allows a small amount of compressed air, which is set by the throttle valve 36, to feed the group of main nozzles 11, so that the main nozzles 11 eject air in the form of a breeze to hold the weft yarn Y.
    Furthermore, a duct 37 branches off from the duct 29 between the pressure gauge 31 and the main regulator 32 and is connected to a first secondary reservoir 39 via a secondary regulator 38. The secondary regulator 38 regulates the pressure of the compressed air which is to be conveyed from the air supply source 26 to a secondary air pressure Ml which is suitable for inserting weft yarn and compressed air which has been adjusted or reduced to the pressure of Ml secondary air is stored in the first secondary tank 39.
    Said plurality of secondary nozzle groups 25 comprise a single secondary nozzle 25A which represents the nozzle closest to the main nozzles 11, three secondary nozzles 25B which are disposed directly downstream of the secondary nozzle 25A with respect to the direction in which the Weft yarn Y is transported through the weft insertion passage 21, four secondary nozzles 25C, four secondary nozzles 25D, four secondary nozzles 25E, four secondary nozzles 25F and four secondary nozzles 25G which are arranged in this order in accordance with downstream of the secondary nozzles 25B.
    The secondary nozzle 25A is connected to the first secondary reservoir 39 via a first secondary valve 40. The secondary nozzle 25A corresponds to the first secondary nozzle of the present invention.
    The groups of the secondary nozzles 25B, 25C, 25D, 25E, 25F and 25G are connected to the first secondary tank 39 via second individual secondary valves 41. The secondary nozzles 25B to 25G correspond to the second secondary nozzles of the present invention.
    Specifically, the secondary nozzle 25A is connected to the first secondary reservoir 39 via the first secondary valve 40 and the conduit 37. Each group of the secondary nozzles 25B to 25G is connected to the first secondary reservoir 39 via its corresponding second secondary valve 41 and to the first secondary reservoir 39 via the conduit 37. A total of twenty-four secondary nozzles 25A to 25G are arranged at a specified interval along the insertion passage 21 of the weft thread. When a weft insertion is implemented, the first secondary valve 40 is activated and compressed air set to the secondary air pressure M1 is conveyed from the first secondary reservoir 39 to the secondary nozzle 25A. Similarly, the second secondary valves 41 are activated and compressed air adjusted to the secondary air pressure M1 is conveyed from the first secondary reservoir 39 to the secondary nozzles 25B to 25G. It should be indicated that the first secondary valve 40 and the second secondary valves 41 are of the same type and have the same specifications and configuration. The number of secondary nozzles 25B which are arranged directly downstream of the secondary nozzle 25A and which are connected to the second secondary valve 41 is equal to three. The sum of the number of the secondary nozzles 25A and the number of the secondary nozzles 25B is equal to four, which is equal to the number of the secondary nozzles 25 in each of the subsequent groups of the secondary nozzles 25C to 25G which are arranged downstream of the group of the secondary nozzles 25B and which are connected to the second secondary valves 41.
    The pressure gauge 31 is electrically connected to a controller 43 having a control board 42 and sends to the controller 43 data relating to the measured pressure of the compressed air. The controller 43 has a memory in which data concerning the pressure supplied by the pressure gauge 31 and various setting values and the like are stored, as well as an operational portion which performs various calculations based on the data. pressure supplied. In addition, the controller 43 stores in its memories various programs which are used for the operation of the air jet type loom and, although not shown in the drawing, controls the start and the stopping the weft insertion operation by sending signals to the main valve 34, the first secondary valve 40 and the second secondary valves 41 during the weft insertion operation of the loom. weave of the air jet type.
    A control flow of the insertion of the weft yarn will now be described with reference to the block diagram which is represented in FIG. 4. In the first place, after the start of a weft insertion (step SI01), the main valve 34 receives an activation command (step S102) in such a manner that compressed air is conveyed from the main tank 33 to the main nozzle group 11 (i.e. the main nozzles 11A to 11F ).
    Then, the weft yarn passes through the main nozzles 11A-11F under the influence of the compressed air conveyed and is ejected with the air for insertion of weft thread from the orifices of the main nozzles 11A to 11F to enter the weft insertion passage 21 (step SI03). It should be indicated that the insertion of the weft yarn is carried out based on a predetermined program and that the main nozzles for insertion of the weft yarn are successively selected one by one from the six nozzles. Main 11A to 11F, in accordance with the program.
    Next, a determination is made as to whether the main nozzle that has been selected for insertion of the weft yarn represents the nozzle closest to the draw line (ie the main nozzle 11C or 11F or if the selected main nozzle does not represent the nozzle closest to the draw line (ie the main nozzle 11A, 11B, 11D or 11E) (step S104). When it has been determined that the main nozzle which has been selected for insertion of the weft thread represents the nozzle closest to the pick-up line, i.e. when the main nozzle 1 IC or 11F is the one selected for insertion of the weft thread (YES in step S104), the program proceeds to step S105 in which the first secondary valve 40 receives a command inviting it to remain closed (command OFF), even if this corresponds to the moment when the weft yarn Y passes through the secondary nozzle 25A.
    As a result, compressed air is not conveyed from the first secondary reservoir 39 to the secondary nozzle 25A and the weft yarn Y is inserted into the weft insertion passage 21 only through the air injected from the main nozzle 11C or the main nozzle 11F, depending on the one that has been selected.
    Then, the second secondary valves 41 receive a command inviting them to open (ON command) successively from the upstream side at the moments corresponding to the passage of the weft yarn Y through the respective secondary nozzles 25B to 25G (step SI06) and compressed air is conveyed from the first secondary reservoir 39 successively to the secondary nozzles 25B to 25G. As a result, the secondary nozzles 25B to 25G receive a command inviting them to inject air successively in the indicated order.
    The weft yarn Y which is inserted into the insertion passage 21 of the weft yarn is transported to the right (or in the downstream direction) being relayed by the air injected from the secondary nozzles 25B to 25G into the weft insertion passage 21 (step S107) and when the weft yarn Y has reached the end of the fabric opposite the main nozzle group 11, the insertion of the weft thread is completed ( step SI 08).
    When it has been determined that the main nozzle which has been selected for insertion of the weft thread does not represent the nozzle closest to the draw line, that is, when one of the main nozzles 11 A, 11 B, 11 D or 11 E represents the nozzle which has been selected for insertion of the weft thread (NO at step S04), the program proceeds to step S09 in which the first valve secondary 40 receives a command inviting it to open (ON command) at the time corresponding to the passage of the weft yarn Y by the secondary nozzle 25A. As a result, compressed air is conveyed from the first secondary reservoir 39 to the secondary nozzle 25A and the secondary nozzle 25A injects air.
    Then, the second secondary valves 41 receive a command inviting them to open (ON command) successively from the upstream side and compressed air is conveyed from the first secondary reservoir 39 successively to the secondary nozzles 25B to 25G (step 110). As a result, the secondary nozzles 25B to 25G inject air successively in the indicated order.
    The weft yarn Y which is inserted into the insertion passage 21 of the weft yarn is conveyed by being relayed by the injected air from the secondary nozzles 25B to 25G to the right (or in the downstream direction) in the weft insertion passage 21 (step SI 11) and when the weft yarn Y has reached the end of the fabric opposite the main nozzle group 11, the insertion of the weft thread ends (Step S108).
    Hereinafter, the operation of the weft insertion device 10 described above in the air jet type loom having the configuration described above is described in accordance with FIG. the first embodiment of the present invention.
    When a weft insertion starts, the main valve 34 receives a command inviting it to activate, so that compressed air is conveyed from the main tank 33 to the main nozzle group 11 (FIG. the main nozzles 11A to 11F). The air injected from the main nozzles 11A to 11F flows to the right (or towards the downstream side) into the insertion passage 21 of the weft thread, as can be seen in FIGS. 1 and 2.
    As shown in FIG. 2, the air injected from the main nozzles 11A-11F strikes the bottom wall surfaces 20 of the recessed portions 15B and is then reflected by the lower wall surfaces 20 as indicated by the arrows. Specifically, the air injected from the main nozzle 11A along the air flow axis PI strikes the bottom wall surface 20 at a point K1 and is then returned to a return flow P2 which is reflected in the direction indicated by the arrow P2 in FIG. 2. The air injected from the main nozzle 11B along the air flow axis Q1 strikes the lower wall surface 20 at a point K2 and is then returned to a return flow Q2 which is reflected in the direction indicated by the arrow Q2 in Figure 2. The air injected from the main nozzle 1 IC along the flow axis of the air RI strikes the bottom wall surface 20 at a point K3 and is then returned to a return flow R2 which is reflected in the direction indicated by the arrow R2 in FIG. 2. In FIG. 2, the points K1, K2 and K3 represent the points of reflection of the air injected from the nozzles respective incipales 11A to 11F. The air injected from the respective main nozzles 11A-11F merges with an air F emanating from the secondary nozzle 25A before being reflected on the lower wall surface 20 of the comb tooth 15A. The main nozzles 11A to 11F and the secondary nozzle 25A are arranged in an arrangement such that the angle of incidence of the air F formed by the secondary nozzle 25A with respect to the lower wall surface 20 is greater than the angles of rotation. incidence Θ1, Θ2 and Θ3 of the air injected from the main nozzles 11A to 11F, respectively. Therefore, with regard to the reflected air flows and their post-melting directions represented by P3, Q3 and R3, respectively, as can be seen in FIG. 2, the reflection angles of the reflected fluxes P3, Q3 and R3 are greater than the reflection angles of the reflected fluxes P2, Q2 and R2 before melting with the air F injected by the secondary nozzle 25A. Specifically, the fusion of the air injected from the main nozzle 11A with the air F injected from the secondary nozzle 25A makes the angle of reflection formed by the reflected flux P3 greater than the angle of reflection. formed by the reflected flux P2 before the fusion. Similarly, the fusion of the air injected from the main nozzle 11B with the air F injected from the secondary nozzle 25A makes the angle of reflection formed by the reflected flux Q3 greater than the angle of reflection. formed by the reflected flux Q2. When the air injected from the main nozzle 1 IC merges with the air F which is injected from the secondary nozzle 25A, the angle of reflection formed by the reflected flux R3 is greater than the angle of reflection formed. by the reflected flux R2 before the fusion.
    In addition, since the main nozzles 11 are arranged to satisfy the equation Θ1 <Θ2 <Θ3, the reflection angle formed by the reflected flux R3 is the largest and the reflection angle formed by the Reflected flux P3 is the smallest relative to the fluxes P3, Q3 and R3, and the reflection angle formed by the reflected flux Q3 lies between the angles of reflection formed by the flows R3 and P3.
    As shown in FIG. 2, when the secondary nozzle 25A receives a command that invites it to inject air together with the air injected from the main nozzle 11C or 11F which represents the nozzle closest to the nozzle. when the air injected from the main nozzle 11C or from the main nozzle 11F is fused with the air F from the secondary nozzle 25A, the fused air strikes the lower wall surface 20 and is then returned to the reflected stream R3. The reflection angle formed by the reflected flux R3 is the largest and therefore there is a risk that the reflected flux R3 may flow out of the weft insertion passage 21 (or towards the side or towards recessed portions 15B) before melting of the reflected stream R3 with the air F emanating from the secondary nozzles 25B which are arranged directly downstream of the secondary nozzle 25 A.
    When a weft yarn Y is inserted from the main nozzle 11C or from the main nozzle 11F, the first secondary valve 40 receives a command which invites it to remain closed (STOP command) even if moment the weft yarn Y passes through the secondary nozzle 25A, and compressed air is not conveyed from the first secondary reservoir 39 to the secondary nozzle 25A, so that one is in the presence of an absence of injection from the secondary nozzle 25A. In the case in which the weft yarn Y is inserted from the main nozzle 11C or from the main nozzle 11F which represents the nozzle closest to the tightening line of pick, the air which comes only from Ια The main nozzle 11 or the main nozzle 11 is reflected on the lower wall surface 20 at a time which corresponds to the passage of the weft yarn Y by the secondary nozzle 25A, so that the reflected flux R2 is obtained such that it can be seen in FIG. 2. The angle of reflection formed by the reflected flux R2 is less than the angle of reflection formed by the reflected flux R3 that is obtained when the jet of air coming from the main nozzle 1 IC or the main nozzle 11 F is fused with the air F from the secondary nozzle 25A, and the reflected flow R2 is fused with the air F from the secondary nozzle 25B which is provided directly downstream of the secondary nozzle 25A before the reflected flux R2 can be flow outside the insertion passage 21 of the weft thread. As a result, no flow of the reflected flux is encountered outside the weft insertion passage 21 and, therefore, easy deflection of the weft yarn Y outside the thread insertion passage 21 is prevented. weft and therefore prevents an incorrectly crisscrossed weft yarn.
    On the other hand, when a weft insertion is carried out via any of the main nozzles 11 A, 11 B, 11 D and 11 E, which do not represent the nozzles closest to the pick-up line. , the first secondary valve 40 receives a command inviting it to open (ON command) and compressed air is conveyed from the first secondary reservoir 39 to the secondary nozzle 25A which is closest to the group of main nozzles 11, ensuring that the secondary nozzle 25A injects air. Consequently, when a weft insertion is carried out by the main nozzles 11A, 11B, 11D and 11E, which do not represent the nozzles closest to the picking line, the air injected from the main nozzles 11 A, 11 B, 11 D and 11 E merges with the air F injected through the secondary nozzle 25A, and the merged air is reflected on the lower wall surface 20 of the comb tooth 15A, giving rise to the formation of the reflected flux P3 or Q3. The reflection angle formed by the reflected flux P3 or by the reflected flux Q3 is smaller than the reflection angle formed by the reflected flux R3, and the reflected flux P3 or Q3 is fused with the air F injected from the secondary nozzle 25B which is disposed directly downstream of the secondary nozzle 25A, before it can flow out of the insertion passage 21 of the weft yarn. As a result, no flow of the flux reflected off the weft insertion passage 21 is encountered.
    Figure 5 is a graph showing the change over time of the pressure in the secondary nozzle 25A. In FIG. 5, the solid line G represents the characteristics of the secondary nozzle 25A which is connected to the first secondary valve 40 and which receives a command inviting it to inject air. The line in lines H represents the characteristics of the secondary nozzle 25A when the secondary nozzle 25A is connected to the second secondary valve 41 to which are connected the three secondary nozzles 25B and which receive a command inviting them to inject air. As can be seen in FIG. 5, the maximum pressure G1 in the characteristics G is greater than the maximum pressure H1 in the characteristics H (G1> H1). The maximum pressure of the secondary nozzle 25A is greater in the case in which the secondary nozzle 25A is connected to the first secondary valve 40 and receives a command inviting it to inject air, that is to say that Ια maximum pressure G1 is greater than the maximum pressure H1. Therefore, the injection pressure of the main nozzles 11A, 11B, 11D and 11E which are spaced apart from the side of the pick-up line can be reduced. In addition, the number of secondary nozzles 25B which are connected to the second secondary valve 41 is smaller than that of the subsequent groups of the secondary nozzles 25C, 25D, 25E, 25F and 25G. As a result, the injection pressure of the secondary nozzles 25B is greater than the injection pressures of the secondary nozzles 25C to 25G, so that the injection pressure of the main nozzles 11A, 11B, 11D and 11E can be reduced by corresponding to this increase, at the time of insertion of the weft thread.
    The weft insertion device 10 in the air jet type loom according to the first embodiment of the present invention provides the effects indicated hereinafter. (1) In the weft insertion device as represented by the reference numeral 10 in the present form of embodiment in which the main nozzle 11G or 11F which represents the nozzle closest to the line of The air-jet type of the air-jet lock is oriented towards the insertion passage 21 of the frame wire by forming an angle of incidence Θ3 with respect to the lower wall surface 20 of the passage 21. insertion of the weft yarn which is large, there is the risk that, when the air injected from the main nozzle 11C or 11F merges with the air F injected by the secondary nozzle 25A disposed closest to the nozzle group main 11, the resulting reflected flux R3 is returned to obtain a flow that flows out of the weft insertion passage 21 before the fusion of the reflected flow R3 with the air F from the secondary nozzle 25B which is planned directly downstream of the bu 25A, so that a deflection of the weft yarns inserted Y with respect to the insertion passage 21 of the weft yarn is obtained. However, according to the present embodiment, when a weft insertion is carried out either by the main nozzle 11C or by the main nozzle 11F, the first secondary valve 40 receives a command which invites it to remain closed (STOP command) when the weft yarn Y passes through the secondary nozzle 25A and compressed air is not conveyed from the secondary tank 39 to the secondary nozzle 25A, so that no air injection takes place from the secondary nozzle 25A. As a result, the air injected from the main nozzle 1 IC or from the main nozzle 11 F is reflected on the lower wall surface 20 to form the reflected flux R2, so that a flow of outside the weft insertion passage 21 with respect to the reflected flux R2 and consequently with respect to the weft yarn inserted from the main nozzle 1 IC or 11F and a fusion of the reflected flux is obtained. R2 with the air F emanating from the secondary nozzle 25B before the reflected stream R2 can flow out of the weft insertion passage 21. Therefore, no flow of the reflected flux is encountered outside the weft insertion passage, so that a deflection of the weft yarn Y with respect to the thread insertion passage 21 is prevented. frame. (2) When a weft insertion is carried out via any of the main nozzles 11A, 11B, 11D and 11E, which do not represent the nozzles closest to the picking line, Ια first secondary valve 40 receives a command inviting it to open (ON command) and compressed air is conveyed from the first secondary reservoir 39 to the secondary nozzle 25A which is closest to the group of main nozzles 11, ensuring that the secondary nozzle 25A injects air. The air emanating from the main nozzles 11A, 11B, 11D or 11E is fused with the air F supplied by the secondary nozzle 25A, thereby obtaining the reflected flux P3 or Q3. The resulting reflected flux P3 or Q3 is fused with the air F emanating from the secondary nozzle 25B which is provided directly downstream of the secondary nozzle 25A before a flow out of the weft insertion passage 21, in such a way that no flow of the flux reflected with respect to the insertion passage 21 of the weft thread is encountered. Accordingly, when a weft insertion is implemented via any one of the main nozzles 11A, 11B, 11D and 11E, wherein the secondary nozzle 25A receives a command inviting it to open. there is no deflection of the weft yarns Y outside the weft insertion passage 21, in the absence of a closing command of the secondary nozzle 25 A. (3) The secondary nozzle 25A which is the closest to the main nozzle group 11 is connected to the first secondary reservoir 39 via the first secondary valve 40. When insertion of weft thread is implemented via the main nozzle 11C or via the main nozzle 11F which represents the nozzle closest to the draw clamping line, the first secondary valve 40 receives a command inviting it to remain closed, even when the weft yarn Y passes through the secondary nozzle 25 A. The pressure of injection of the secondary nozzle 25A is zero and by co The result is less than the injection pressures of the secondary nozzles 25B to 25G. Accordingly, it is possible to prevent a deflection of Y-weft yarns outside the weft insertion passage 21 in a successful manner by resorting to a simple configuration, as compared to a configuration in which there is a need to utilizing the first secondary valve as a pressure regulating valve or in which a plurality of air reservoirs are to be provided in which compressed air having different pressures is stored. (4) The first embodiment of the present invention can be implemented through a minimal modification, i.e. by providing the secondary valve 40 which is of the same type as that of the secondary valves. 41 and which is also of a conventional type, and by connecting the single secondary nozzle 25A, which is disposed closest to the main nozzle group 11, to the first secondary valve 40. In addition, only one secondary nozzle 25A is connected to the first secondary valve 40 and the number of the secondary nozzles in the group of the secondary nozzles 25B that is provided directly downstream of the secondary nozzle 25A is less than the number of secondary nozzles in the subsequent groups of secondary nozzles 25C , 25D, 25E, 25F and 25G. As a result, the injection pressure of the secondary nozzle 25A and the secondary nozzles 25B which are mounted directly downstream of the secondary nozzle 25A can be raised and consequently the injection pressure of the main nozzles 11 can be correspondingly reduced. A, 11 B, 11 D and 11 E. In this way, the energy consumption can be reduced more easily. (5) When the secondary nozzle 25A which is closest to the main nozzle group 11 receives a command inviting it to inject air via the first secondary valve 40, the injection pressure of the main nozzles 11 can be reduced. A, 11 B, 11 D and 11 E, other than the main nozzles 11C and 11F which represent the nozzles closest to the pick-up line, with respect to a configuration in which the secondary nozzle 25A is incorporated in the group of secondary nozzles 25B.
    Second embodiment
    Hereinafter, a second embodiment of the present invention will be described with reference to FIG.
    The second embodiment differs from the first embodiment with respect to the configuration of the first secondary valve, the remainder of the configuration being substantially the same. Therefore, for ease of explanation, a number of reference numerals will be used for both the first and second embodiments to designate the same components or elements and their details will be omitted: only the differences relative to the first embodiment will be described.
    The connection of the air ducts of the weft insertion device into an air jet loom, which is designated by the reference numeral 50, will now be described with reference to the block diagram of FIG. Figure 6.
    The secondary nozzle 25A which is closest to the main nozzle group 11 is connected to a switching valve 51 which includes a first valve 51A, a second valve 51B and a check valve 51C which is provided between the first valve 51A and the second valve 51 B. The switching valve 51 is configured to change the pressure by switching between the first valve 51A and the second valve 51 B. It should be indicated that the switching valve 51 corresponds to the first secondary valve of the present invention. The secondary nozzle 25A which is closest to the main nozzle group 11 is connected to the first valve 51A and also to the first secondary reservoir 39 via the conduit 37. The secondary nozzle 25A is connected to the second valve 51 B and also to a second secondary tank 53 via the conduit 52. The pressure M2 of the compressed air in the second secondary reservoir 53 is less than the pressure Ml that prevails in the first secondary reservoir 39. In other words, the air pressure compressed in the second secondary reservoir 53 is less than the pressure of the compressed air in the first secondary reservoir 39.
    The duct 37 branches off from the duct 29 between the pressure gauge 31 and the main regulator 32 and is connected to the secondary regulator 38. A secondary regulator 54 is connected in the duct 52 which branches off from the duct 37 and is connected to the second secondary tank 53. The secondary regulator 54 regulates the pressure of the compressed air conveyed from the air supply source 26 to reach the secondary air pressure M2 which is suitable for insertion of weft yarn and the compressed air which has been subjected to adjustment or reduction to reach the secondary air pressure M2 is stored in the second secondary tank for the air 53.
    The command that is implemented during a weft insertion will now be described. When a weft insertion is carried out by the main nozzle 1 IC or by the main nozzle 11 F which is the closest to the draw clamping line of the air jet type loom, the switching valve 51 receives a command inviting it to open the second valve 51B (ON command) as the weft yarn Y passes through the secondary nozzle 25A, such as compressed air under low pressure is conveyed, from the second secondary tank 53 whose pressure is lower than that prevailing in the first secondary reservoir 39, the secondary nozzle 25A which is closest to the main nozzle group 11 so as to make sure that the nozzle Secondary 25A injects air. The first valve 51A then receives a command which invites it to remain closed (STOP command).
    On the other hand, when a weft insertion is carried out via any of the main nozzles 11A, 1B, 11D and 11E which do not represent the nozzles closest to the picking line, the switching valve 51 receives a command inviting it to open the first valve 51A (ON command) at the moment corresponding to the passage of the weft yarn Y by the secondary nozzle 25A, thereby allowing compressed air to be fed from the first secondary tank 39 to the secondary nozzle 25A for the purpose of injecting air from the secondary nozzle 25A. Since at this moment the second valve 51B remains closed (STOP command), the check valve 51C between the first valve 51A and the second valve 51B prevents a flow of compressed air from the first secondary reservoir 39 ( wherein the upper secondary air pressure Ml) prevails into the second secondary reservoir 53 via the second valve 51 B.
    In this way, during a weft insertion using the main nozzle 11C or the main nozzle 11F which represents the nozzle closest to the draw clamping line of the air jet type loom. , the switching valve 51 receives a command inviting it to open the second valve 51B (ON command) to allow delivery of compressed air whose pressure is low from the second secondary tank 53, in which there is a lower pressure than that prevailing in the first secondary reservoir 39, the secondary nozzle 25A. The air injected from the main nozzle 1 IC or from the main nozzle 11F is fused with the low pressure air from the secondary nozzle 25A and is reflected on the lower wall surface 20 of the passage 21 of the insertion of the weft thread. The resulting reflected flux is then fused with the air F from the secondary nozzle 25B which is disposed directly downstream of the secondary nozzle 25A before a flow of the reflected flux outside the insertion passage 21 of the weft yarn. As a result, the reflected flux is not subjected to flow outside the weft insertion passage 21. As a result, there is no deflection of the weft yarns outside the weft insertion passage 21 and the occurrence of incorrect weft crisscrosses is prevented. .
    It will be understood, of course, that the present invention is not limited to the embodiments indicated above. The present invention may be modified in various ways as set forth below without departing from the spirit and scope of the invention.
    In accordance with the first and second embodiments of the present invention, the secondary nozzle group 25B includes three secondary nozzles and each of the secondary nozzle groups 25C-25G includes four secondary nozzles. However, a configuration may be envisaged wherein the group of secondary nozzles 25B includes a single secondary nozzle and wherein each group of secondary nozzles 25C-25G includes two secondary nozzles. In this case, air can be injected smoothly.
    In accordance with the first and second embodiments of the present invention, the secondary nozzle group 25B includes three secondary nozzles and each of the secondary nozzle groups 25C-25G includes four secondary nozzles, and the secondary nozzles 25A-25G are disposed. respecting a specified interval. According to the present invention, the secondary nozzle groups 25A-25G may nevertheless be arranged in two separate zones along the weft insertion passage 21, in which arrangement the specified interval between the secondary nozzles in the upstream is different from the specified interval in the area downstream of the weft insertion passage 21. Specifically, it is possible to envisage a configuration in which, in the zone situated on the upstream side in the insertion passage 21 for the weft thread, a number of the groups of secondary nozzles 25A to 25G which include two secondary nozzles, and disposed in the region which is located on the downstream side in the insertion passage 21 of the weft yarn, the remaining groups of secondary nozzles 25A to 25G which include three secondary nozzles. In this case, the specified interval between the secondary nozzles in the area upstream of the weft insertion passage 21 is less than the specified interval between the secondary nozzles in the downstream zone, so that the the air consumption for air injections can be reduced by the secondary nozzles between which a larger specified range is provided in the area downstream of the weft insertion passage 21.
    In the modified embodiment as indicated above, each group of secondary nozzles in the area upstream of the weft insertion passage may include four secondary nozzles, while each of the remaining nozzle groups secondary in the downstream zone may include three secondary nozzles. In this configuration, the secondary nozzles in the upstream zone are spaced apart with a smaller gap than the secondary nozzles in the downstream zone, so that the air consumption for the air injection can be reduced by the secondary nozzles between which is provided a larger gap in the region of the upstream side of the passage 21 for the insertion of the weft yarn.
    A pressure regulating valve may be used as the first secondary valve in such a way that the pressure of the compressed air to be supplied to the secondary nozzle 25A is reduced when weft insertion is carried out. by the main nozzle 11C or by the main nozzle 11 F which represents the nozzle closest to the clamping line of pick of the air jet type loom.
    It is also possible to envisage a configuration in which the injection pressure of the first secondary nozzles is set to be lower than the injection pressures of the second secondary nozzles during the insertion of the weft thread, by using main nozzles different from the main nozzles. which represent the nozzles closest to the draw clamping line of the air jet type loom, depending on the deflection state of the weft yarns outside the passage 21 for the insertion of the yarn frame.
    权利要求:
    Claims (5)
    [1]
    A method for controlling a weft insertion in an air jet type loom comprising: a plurality of main nozzles (11 A, 11 B, 11 C, 11 D, 11 E, 11 F ) arranged side by side in the front-to-back direction of the air jet type loom; a comb (15) disposed downstream of the main nozzles (11A, 11B, 11C, 11D, 11E, 11F) relative to the weft insertion direction of the jet type loom; air and mounted on a leaf (13), the comb (15) having, in its front surface, a hollow passage (21) insertion of the weft thread; and a plurality of secondary nozzles (25A, 25B, 25C, 25D, 25E, 25F) which are disposed along the weft insertion passage (21), the secondary nozzles (25A, 25B, 25C, 25D, 25E , 25F) including a first secondary nozzle (25A) which represents the nozzle closest to the main nozzles (11A, 11B, 11C, 11D, 11E, 11F) and a plurality of second secondary nozzles (25B, 25C , 25D, 25E, 25F) which do not represent the nozzles closest to the main nozzles (11A, 11B, 11C, 11D, 11E, 11F), characterized in that the method further comprises the fact of: adjusting an injection pressure of the first secondary nozzle (25A) to obtain an injection pressure lower than the injection pressures of the second secondary nozzles (25B, 25C, 25D, 25E, 25F) when inserting weft yarn is implemented by at least one main nozzle (11 C, 11 F) among the main nozzles (11 A, 11 B, 11 C, 11 D, 11 E, 11 F), which represents the most proximal nozzle e of a tightening line of pick.
    [2]
    An air jet loom comprising a weft insertion device (10, 50) comprising: a plurality of main nozzles (11A, 11B, 11C, 11D, 11E, 11 F) arranged side by side in the front-to-back direction of the jet loom; a comb (15) disposed downstream of the main nozzles (11A, 11B, 11C, 11D, 11E, 11F) relative to the weft insertion direction of the jet type loom; air and mounted on a leaf (13), the comb (15) having, in its front surface, a hollow passage (21) insertion of the weft thread; and a plurality of secondary nozzles (25A, 25B, 25C, 25D, 25E, 25F) which are disposed along the weft insertion passage (21), the secondary nozzles (25A, 25B, 25C, 25D, 25E , 25F) including a first secondary nozzle (25A) which represents the nozzle closest to the main nozzles (11A, 11B, 11C, 11D, 11E, 11F) and a plurality of second secondary nozzles (25B, 25C , 25D, 25E, 25F) which do not represent the nozzles closest to the main nozzles (11A, 11B, 11C, 11D, 11E, 11F); and a plurality of secondary valves (40, 41, 51) which are connected to the secondary nozzles (25A, 25B, 25C, 25D, 25E, 25F); characterized in that: the second secondary nozzles (25B, 25C, 25D, 25E, 25F) are grouped into a multitude of groups; the secondary valves (40, 41, 51) include a first secondary valve (40, 51) and a plurality of second secondary valves (41); Ια first secondary nozzle (25A) is connected to the first secondary valve (40, 51); the groups of the second secondary nozzles (25B, 25C, 25D, 25E, 25F) are connected to the respective second secondary valves (41); each group of the second secondary nozzles (25B, 25C, 25D, 25E, 25F) is connected to a first secondary tank (39) via the corresponding second secondary valve (41); the weft insertion device (10, 50) includes a control device (43) which controls the first secondary valve (40, 51) and the second secondary valves (41); and when the insertion of the weft yarn is carried out by at least one main nozzle (11C, 11F) among the main nozzles (11A, 11B, 11C, 11D, 11E, 11F), which represents the nozzle closer to a pick-up line, the controller (43) controls the first secondary valve (40, 51) in such a way that the injection pressure of the first secondary nozzle (25A) is less than injection pressures of the second secondary nozzles (25B, 25C, 25D, 25E, 25F).
    [3]
    An air jet type weaving machine comprising a weft insertion device (10, 50) according to claim 2, characterized in that: the first secondary nozzle (25A) is connected to the first secondary reservoir (39) via the first secondary valve (40); and when the insertion of the weft yarn is carried out by the main nozzle (11 C, 11 F) among the main nozzles (11 A, 11 B, 11 C, HD, 11 E, 11 F), which represents the most near the pick-up line, the controller (43) controls the first secondary valve (40) to remain closed, even when a weft yarn (Y) passes through the first secondary nozzle ( 25A).
    [4]
    Air jet type weaving machine comprising a weft insertion device (10, 50) according to claim 3, characterized in that: the first secondary valve (40) and the second secondary valves ( 41) are of the same type; and the sum of the number of the first secondary nozzles (25A) and the number of the second secondary nozzles (25B) in the group which is arranged directly downstream of the first secondary nozzle (25A) is equal to the number of secondary nozzles in each of the groups subsequent second nozzles (25C, 25D, 25E, 25F).
    [5]
    An air jet type weaving machine comprising a weft insertion device (10, 50) according to claim 2, characterized in that: the first secondary valve (40, 51) is a switch (51) which includes a first valve (51A) and a second valve (51B) which is connected to the first valve (51A), and which is configured for pressure switching between the first valve (51A) and the second valve (51 B); the first secondary nozzle (25A) is connected to the first secondary reservoir (39) via the first valve (51A); and Ια first secondary nozzle (25A) is connected via the second valve (51 B) to a second secondary reservoir (53) in which there is a pressure that is lower than the pressure in the first secondary reservoir (39).
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2015-052805|2015-03-17|
    JP2015052805A|JP6172186B2|2015-03-17|2015-03-17|Weft insertion control method for air jet loom and weft insertion device for air jet loom|
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