JP2016084557A - Weft yarn tension applying device in air jet loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To early and reliably draw out the leading end part of a weft yarn captured by a weft yarn capturing pipe from the weft yarn capturing pipe after beating.SOLUTION: On a weft insertion downstream side, there are arranged a stretch nozzle 14 and a weft yarn capturing pipe 15 for capturing a leading end part Y1 of a weft yarn Y by compressed air from the stretch nozzle 14. At the rear of a modified reed 2, there is arranged a weft yarn discharge nozzle 16 for jetting, after beating, compressed air toward the leading end part Y1 of the weft yarn Y extending from the selvage of a waste selvage 6 to the weft yarn capturing pipe 15. The jetting port of the weft yarn discharge nozzle 16 is made to face spaces between dents 2A. The compressed air jetted from the weft yarn discharge nozzle 16 passes through the spaces between the dents 2A, and thereby undergoes a straightening effect to be improved in directivity. Thus, the compressed air can be accurately blown against the leading end part Y1 of the weft yarn Y. Since the weft yarn discharge nozzle 16 is provided at the rear of the modified reed 2, the jetting of the compressed air can be performed immediately after the beating, so that the leading end part Y1 of the weft yarn Y can be early and reliably drawn out from the weft yarn capturing pipe 15.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a weft tension applying device in an air jet loom that introduces and captures the tip of a weft thread inserted into a weft capture pipe by compressed air jetted from a stretch nozzle.

  In the air jet loom, a weft tension applying device has been developed that applies a tension to the weft by preventing the loose end of the woven fabric by catching and hammering the leading end of the weft inserted. For example, Patent Document 1 discloses a weft tension device in which a tension nozzle and a blow-off device that removes the weft yarn from the yarn guide duct of the tension nozzle are provided on one piece attached to the end of the heel. One piece mounted on the end of the heel has a through duct that extends to an extension of a yarn transport duct that transports the weft.

  The tension nozzle consists of a yarn guide duct and a blow nozzle that creates an air flow in the yarn guide duct. The blow-out device is located in the vicinity of the entrance of the yarn guide duct on the rear wall surface of the through duct, and can blow an air flow from the back of the yarn guide duct toward the cloth edge to apply an appropriate force to the remaining end of the weft yarn. . When the weft is inserted into the warp opening, the remaining end of the weft is blown into the yarn guide duct by the air flow of the tension nozzle. When the sley moves backward after the beating, the operation of the pulling nozzle is stopped and the blowing device is operated. The blow-out device blows out an air flow to draw out the remaining end of the weft from the yarn guide duct.

JP-A-4-308252

  Since the weft tension device disclosed in Patent Document 1 has a configuration in which a tension nozzle and a blow-out device are provided in a block-like piece provided with a through duct on the extension of the yarn transport duct at the end of the heel. The air flow of the blowing device is blown into the open space and is in a state where it is easy to diffuse. The diffusion of the air flow in the blow-out device weakens the force acting on the remaining end of the weft and may make it impossible to pull out the remaining end of the weft existing in the yarn guide duct of the tension nozzle.

  Moreover, since the weft tensioning device of Patent Document 1 is configured to be attached to the end portion of the kite, it is used for a so-called non-cut lead in which the weaving width can be increased / decreased without cutting the kite provided with the yarn transport duct. (The scissors disclosed in Patent Document 1 are so-called cut leads that use a special scissors in accordance with the length of the woven width, so one block-like piece can be attached to the end of the scissors. ).

  It is an object of the present invention to reliably and quickly pull out the tip of the weft captured by the weft capture tube from the weft capture tube after the beating.

  According to the first aspect of the present invention, the weaving width can be increased / decreased without cutting the deformed scissors provided with the weft guide passage, and the weft and the weft guide passage are crossed at the position on the front end side of the weft inserted. A weft yarn in an air jet loom that provides a stretch nozzle for flowing compressed air and a weft trap tube for introducing compressed air, and traps the tip of the weft thread inserted in the weft trap tube and applies tension to the weft yarn In the tension applying device, a weft discharge nozzle for injecting compressed air from the scraper to the weft continuous with the weft capturing pipe after the beating between the scraper and the stretch nozzle on the back surface of the deformed kite , And the jet port of the compressed air of the weft discharge nozzle is opposed to the gap between the ridges of the deformed rod.

  According to the first aspect, the compressed air injected from the weft discharge nozzle is subjected to a rectifying action by passing through the gap between the wings, so that the directivity is increased. Compressed air can be accurately blown onto the part. Further, since the weft discharge nozzle is provided on the back surface of the deformed kite, the compressed air can be injected immediately after the beating, and the leading end of the weft can be reliably and quickly pulled out from the weft capturing tube. Further, since the weft discharge nozzle is installed on the back surface of the deformed kite, a large space is not required, and the distance from the woven end of the woven fabric to the stretch nozzle can be set to the shortest. For this reason, the length of the front-end | tip part of the weft which continues to a weft capture pipe | tube from discarding can be shortened, and useless consumption of the weft can be avoided.

  According to a second aspect of the present invention, the weft capturing tube and the weft discharge nozzle are fixed to the slay via the same support member. According to the second aspect, the weft capture tube and the weft discharge nozzle can be moved together during the weaving width adjustment, and the adjustment is easy.

  According to a third aspect of the present invention, the weft capturing tube and the weft discharge nozzle are fixed to the slay via independent support members. According to the third aspect, the positional relationship between the weft capturing tube and the weft discharge nozzle can be freely adjusted according to the weaving conditions.

  According to a fourth aspect of the present invention, the weft discharge nozzle is fixed to a mounting plate having a U-shaped portion that covers the upper frame of the deformed rod. According to the fourth aspect of the present invention, it is possible to divert the tack stop member that is an off-the-shelf part of an air jet loom.

  According to a fifth aspect of the present invention, a tuck-in ear device provided with a suction pipe that opens toward the weft guide passage is arranged at a woven end position of the woven fabric side by side with the stretch nozzle, and the weft discharge nozzle is sucked into the tuck-in ear device. It is characterized by being directed to the pipe. According to the fifth aspect, the pressure of the compressed air injected from the weft discharge nozzle is applied to increase the suction force of the suction pipe, thereby further improving the function of capturing the weft yarn when forming the tuck-in ear.

  According to the present invention, the front end portion of the weft captured by the weft capturing tube can be reliably pulled out early from the weft capturing tube after beating.

1 is a schematic plan view of a weft tension applying device installed in an air jet loom according to a first embodiment. It is a front view of a weft tension applying device. It is a rear view of a weft tension applying device. It is a side view of a weft tension applying device. It is an enlarged plan view of the weft tension applying device. (A) is a rear view of the weft tension applying device showing the second embodiment, and (B) is a view taken along the line AA of (A). It is a schematic plan view of the weft tension applying device showing the third embodiment.

(First embodiment)
A first embodiment will be described with reference to FIGS. FIG. 1 shows the weft insertion downstream side, which is the position on the front end Y1 side of the weft Y inserted. The sley 1 is fixed to a rocking shaft (not shown) via a sleyword 1A (see FIG. 4) and performs a swinging motion. A deformed kite 2 composed of a large number of kite wings 2A mounted on the sley 1 includes a weft guide passage 4 that opens toward the pre-weave 3 side. The deformation rod 2 is configured in the form of a so-called non-cut lead that allows the weaving width of the woven fabric to be woven to be increased or decreased without cutting the deformation rod 2. A temple device 7 is disposed on the woven end of the woven fabric 5 and the scraper 6 so as to straddle both.

  The weft Y2 between the woven fabric 5 and the discarding ear 6 that has passed through the temple device 7 is cut by a cutter 8 disposed between the woven fabric 5 and the discarding ear 6. A plurality of auxiliary nozzles 9 for weft insertion and a weft feeler 10 for detecting the completion of weft insertion are disposed on the sley 1. The weft feeler 10 is arranged between the woven fabric 5 and the scraper 6. In addition, 11 shows a warp and 12 shows a discard thread.

A weft tension applying device 13 is arranged on the sley 1 on the downstream side of the weft insertion 6 from the weft ear 6.
The weft tension applying device 13 includes a stretch nozzle 14 disposed on the front surface of the deformed kite 2 (winding side of the woven fabric 5), and a weft capturing tube 15 disposed on the rear surface of the deformed kite 2 (the sending side of the warp 11). And a weft discharge nozzle 16.

  As shown in FIG. 4, the stretch nozzle 14 includes an injection port 14 </ b> A directed to the weft guide passage 4, and a bolt 18 inserted through the T groove 17 of the slay 1 is passed through the base 19, and the nut 20 is tightened. It is fixed to sley 1. The stretch nozzle 14 can move in the weaving width direction by loosening the nut 20 to adjust the attachment position. A compressed air supply tube 21 connected to an air supply source (not shown) is connected to the lower end of the stretch nozzle 14 via a switching valve (not shown). The switching valve is activated and stopped at a set timing from immediately before the end of weft insertion until the beating. The stretch nozzle 14 injects and stops compressed air from the injection port 14 </ b> A by operating and stopping the switching valve, and introduces the leading end Y <b> 1 of the weft Y into the weft capturing tube 15.

  As shown in FIGS. 2 to 5, an L-shaped bracket 22 is disposed on the back surface of the deformed rod 2 as a support member. The horizontal side 23 of the L-shaped bracket 22 is fixed to the upper surface of the sley 1 by bolts 24, and the vertical side 25 is arranged to be parallel to the deformation rod 2. The bracket 22 can be moved in the weaving width direction by loosening the bolt 24 to adjust the fixing position. Further, the vertical side 25 does not necessarily have to be arranged in parallel with the deformation rod 2 and may be inclined with respect to the deformation rod 2.

  As shown in FIG. 5, a weft capturing tube 15 is attached to a vertical side 25 of the bracket 22 by a metal fitting 26. The weft capturing tube 15 is formed in a cylindrical shape bent into an L shape having a short tube 27 and a long tube 28. The short cylinder 27 is installed at a height that coincides with the weft guide passage 4 of the deformed kite 2, and the introduction port 15 </ b> A at the end of the short tube 27 opens toward the back surface of the deformed kite 2. The position of the introduction port 15 </ b> A of the short cylinder 27 faces the compressed air injection port 14 </ b> A of the stretch nozzle 14. The long cylinder 28 extends in parallel with the deformed rod 2 and has an end opened to the outside.

  Expanding pins 29 are provided on the vertical side 25 so as to sandwich the short cylinder 27 at the upper and lower portions of the introduction port 15A of the weft capturing tube 15 attached to the vertical side 25 of the bracket 22 (FIGS. 2 to 4). reference). The upper and lower spreading pins 29 protrude toward the back surface of the deformed kite 2 and enter the gap between the wings 2A to widen the gap between the wings 2A. The introduction port 15 </ b> A of the weft capturing tube 15 opens to face the gap between the wings 2 </ b> A expanded by the expansion pin 29.

  A weft discharge nozzle 16 is attached to the vertical side 25 of the bracket 22 by a metal fitting 30 adjacent to the short cylinder 27 of the weft capturing tube 15 on the opposite side to the weft insertion direction. The injection port 16A of the weft discharge nozzle 16 is opened facing the gap between the wings 2A. The mounting position of the weft discharge nozzle 16 is set to a height directed to the front end Y1 of the weft Y that is stretched between the scraper 6 and the weft capturing tube 15 when the weft Y is beaten. The gap between the wings 2 </ b> A facing the injection port 16 </ b> A of the weft discharge nozzle 16 is not affected by the expansion by the expansion pin 29.

  The rear end of the weft discharge nozzle 16 is connected to a compressed air supply tube 32 by a metal fitting 31. The supply tube 32 is connected to a compressed air supply source (not shown) via a switching valve (not shown). The switching valve is set in advance so as to operate for a certain time after the beating. Therefore, the weft discharge nozzle 16 can inject compressed air from the injection port 16A toward the tip Y1 of the weft Y after beating. Since the weft capture tube 15 and the weft discharge nozzle 16 are fixed to the sley 1 via a bracket 22 which is the same support member, the weft capture tube 15 and the weft discharge nozzle 16 are moved together when adjusting the weaving width. And can be adjusted easily.

  Next, the operation of the weft tension applying device 13 will be described. In FIG. 1, before the weft insertion of the weft Y is completed, the stretch nozzle 14 is operated to inject compressed air from the injection port 14A. The compressed air injected from the stretch nozzle 14 crosses the weft guide passage 4 and is blown into the introduction port 15A of the weft capturing tube 15 from between the expanded wings 2A, as indicated by arrows.

  At the end of weft insertion, the front end Y1 of the weft Y that has reached the position of the stretch nozzle 14 is introduced into the introduction port 15A of the weft capturing tube 15 by the compressed air injected from the injection port 14A of the stretch nozzle 14. The front end Y1 of the weft Y is captured by compressed air while being bent between the short tube 27 and the long tube 28 of the weft capture tube 15.

  After the weft insertion, the weft Y that has been inserted is given a large tension because the leading end Y1 is maintained in the weft capturing tube 15 by the compressed air injected from the injection port 14A of the stretch nozzle 14. It is beaten while being done. When the sley 1 starts to retreat after the beating is finished, the stretch nozzle 14 stops the injection of compressed air, and at the same time, the weft discharge nozzle 16 starts the injection of compressed air.

  Compressed air injected from the injection port 16A of the weft discharge nozzle 16 is passed through the gap between the wings 2A, and thus is subjected to a rectifying action by the gap extending up and down of the wings 2A and imparted strong directivity. It flows in layers. For this reason, the compressed air injected from the injection port 16A of the weft discharge nozzle 16 operates efficiently even if the height of the front end portion Y1 of the weft Y that continues from the weft capture tube 15 to the weave end of the scraper 6 fluctuates. The tip Y1 can be quickly and reliably pulled out from the weft capturing tube 15.

  In the first embodiment, the compressed air injected from the injection port 16A of the weft discharge nozzle 16 is subjected to a rectifying action by passing through the gap between the wings 2A, so that directivity is increased. Compressed air can be accurately blown against the tip Y1 of the weft Y continuous with the capture tube 15. Further, since the weft discharge nozzle 16 is provided on the back surface of the deformed kite 2, the compressed air can be injected immediately after the beating, and the weft can be reliably and quickly pulled out from the weft capturing tube 15.

  Further, since the weft discharge nozzle 16 is installed on the back surface of the deformed kite 2, it does not require a large space and can be mounted adjacent to the bracket 22 for mounting the weft capturing tube 15. To the stretch nozzle 14 can be set to the shortest distance. For this reason, the length of the front end Y1 of the weft Y connected to the weft catching tube 15 from the scraper 6 can be shortened as much as possible, and wasteful consumption of the weft Y can be avoided.

  Further, the compressed air injection port 14A of the stretch nozzle 14 can be directly directed to the tip Y1 of the weft Y, and the introduction port 15A of the weft capturing tube 15 is disposed in the gap between the expanded wings 2A. Therefore, the front end Y1 of the weft Y can be reliably introduced into the weft capturing tube 15.

(Second Embodiment)
FIGS. 6A and 6B show the second embodiment. The same components as those in the first embodiment will be described with the same reference numerals, and detailed description thereof will be omitted. In the second embodiment, the mounting form of the weft discharge nozzle 16 is changed. In the second embodiment, a rectangular attachment plate 33 as a support member is used separately from the L-shaped bracket 22 to which the weft capturing tube 15 is attached. The mounting plate 33 is bent at one end to form a U-shaped portion 33A, and the U-shaped portion 33A is placed on the upper frame 2B of the deformed rod 2 at a position adjacent to the vertical side 25 of the bracket 22, and the upper frame is secured by bolts 34. Fix to 2B.

  The weft discharge nozzle 16 is disposed on the other end side of the attachment plate 33 so as to penetrate the attachment plate 33 at a position facing the front end portion Y1 of the weft Y connected to the weft capture tube 15 from the weave end of the scraper 6. And fixed with the metal fitting 31. The operations of the weft capture tube 15 and the weft discharge nozzle 16 are the same as those in the first embodiment, and a detailed description thereof will be omitted. Since the weft capture tube 15 and the weft discharge nozzle 16 are fixed to the slay 1 via a bracket 22 and a mounting plate 33 which are independent support members, respectively, the weft capture tube 15 and the weft discharge nozzle 16 are separated from each other. The positional relationship can be freely adjusted according to the weaving conditions.

  In the second embodiment, the weft discharge nozzle 16 can be easily installed by using the mounting plate 33 having a simple shape, and the discharge of the tip Y1 of the weft Y is the same as that of the first embodiment. An effect can be obtained. Further, the air jet loom is provided with a wobbling prevention member for preventing vibration of the wrinkle 2A at a position corresponding to the weft feeler 10 as necessary. If a mounting hole is provided in a part of the tack stop member to form the mounting plate 33, the weft discharge nozzle 16 can be installed using the tack stop member.

(Third embodiment)
FIG. 7 shows the third embodiment. The same components as those of the first embodiment are described with the same reference numerals, and detailed description thereof is omitted. In the third embodiment, the weft tension applying device 13 shown in the first embodiment is implemented in an air jet loom provided with a tack-in ear device 35.

  The tuck-in ear device 35 has a known configuration, and a main body 36 provided with a tuck-in needle (not shown) is arranged at the woven end position of the woven fabric 5 side by side with the stretch nozzle 14. The suction pipe 37 of the tuck-in ear device 35 is disposed between the main body 36 and the stretch nozzle 14 outside the woven fabric 5. A suction port 37 </ b> A of the suction pipe 37 opens toward the weft guide passage 4. The stretch nozzle 14 and the weft capturing tube 15 of the weft tension applying device 13 have the same configuration as that of the first embodiment. The stretch nozzle 14 is disposed in front of the weft guide passage 4. The weft capturing tube 15 is disposed at a position facing the stretch nozzle 14 on the back surface of the deformed kite 2.

  The weft discharge nozzle 16 has the same configuration as that of the second embodiment, and is provided on a mounting plate 33 provided on the back surface of the deformed kite 2 between the warp 11 and the weft capturing tube 15. The jet port 16A of the weft discharge nozzle 16 is directed to the suction port 37A of the suction pipe 37 through the gap between the wings 2A of the deformed kite 2. The weft feeler 10 is disposed between the stretch nozzle 14 and the suction pipe 37 on the front surface of the deformed kite 2.

  During the operation of the loom, the front end Y1 of the weft Y inserted is blown into the weft capture tube 15 by the compressed air injected from the stretch nozzle 14, and the weft Y is beaten while being applied with tension. When the slay 1 is subsequently retracted, the injection of compressed air from the stretch nozzle 14 is stopped, and the compressed air injected from the weft discharge nozzle 16 draws the tip Y1 of the weft Y from the weft capture tube 15.

  The front end Y1 of the weft Y is blown into the suction port 37A of the suction pipe 37 by the compressed air of the weft discharge nozzle 16, and is sucked into the suction pipe 37 by the suction airflow of the suction pipe 37. In the suction pipe 37, the force of the compressed air of the weft discharge nozzle 16 is added to the suction force of the suction pipe 37 itself, and the leading end portion Y1 of the weft Y is sucked by the large suction force to increase the holding power of the weft Y. it can.

  In the third embodiment, by adopting a configuration in which the weft discharge nozzle 16 is directed to the suction pipe 37, the compressed air injected from the injection port 16A of the weft discharge nozzle 16 draws the tip Y1 of the weft Y through the suction pipe. 37 can be actively blown into the suction port 37A. Further, the compressed air of the weft discharge nozzle 16 can increase the suction force of the suction pipe 37, and can further enhance the capturing function of the front end portion Y1 of the weft Y at the time of tuck-in ear formation.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications are possible within the scope of the gist of the present invention, and can be implemented as follows.

(1) The weft discharge nozzle 16 may be integrated with the weft capturing tube 15.
(2) In the first and second embodiments, the weft tension applying device 13 has the stretch nozzle 14 disposed on the back side of the deformed kite 2 and the weft capturing tube 15 disposed on the front side of the deformed kite 2. However, a configuration in which the weft discharge nozzle 16 is disposed on the back side of the deformation rod 2 may be implemented.
(3) In the second embodiment, the attachment plate 33 of the weft discharge nozzle 16 may be configured to be fixed to the sley 1.

DESCRIPTION OF SYMBOLS 1 Sley 2 Deformation 2A Warp 2B Upper frame 4 Weft guide passage 5 Woven cloth 6 Disposal 9 Auxiliary nozzle 10 Weft feeler 13 Weft tension imparting device 14 Stretch nozzle 14A Injection port 15 Weft capture pipe 15A Inlet 16 Weft discharge nozzle 16A Injection port 21, 32 Supply tube 22 Bracket 23 Short side 25 Long side 26, 30, 31 Metal fitting 27 Short tube 28 Long tube 29 Expanding pin 33 Mounting plate 33A U-shaped portion 35 Tuck-in ear device 36 Main body 37 Suction pipe 37A Suction port

Claims (5)

The weaving width can be increased / decreased without cutting the deformed scissors having the weft guide passage, and compressed air is allowed to flow across the weft and the weft guide passage to the position on the tip side of the weft inserted. In a weft tension applicator in an air jet loom that arranges a stretch nozzle and a weft capturing pipe for introducing compressed air, captures the tip of the weft thread inserted into the weft capturing pipe and applies tension to the weft,
On the back surface of the deformed kite, a weft discharge nozzle for injecting compressed air from the discard tab toward the weft continuous with the weft capturing tube is disposed between the discard tab and the stretch nozzle. A weft tension applying device in an air jet loom, wherein a jet of compressed air of the weft discharge nozzle is opposed to a gap between the wings of the deformed kite.   2. The weft tension applying device in an air jet loom according to claim 1, wherein the weft capturing pipe and the weft discharge nozzle are fixed to a slay via the same support member.   2. The weft tension applying device in an air jet loom according to claim 1, wherein the weft capture pipe and the weft discharge nozzle are fixed to the slay via independent support members.   4. The weft tension applying device in an air jet loom according to claim 3, wherein the weft discharge nozzle is fixed to a mounting plate having a U-shaped portion that covers the upper frame of the deformed rod.   A tuck-in ear device provided with a suction pipe that opens toward the weft guide passage is arranged at the woven end position of the woven fabric in line with the stretch nozzle, and the weft discharge nozzle is directed to the suction pipe of the tuck-in ear device. The weft tension applying device in an air jet loom according to any one of claims 1 to 3, wherein

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