JPS62257444A - Weft yarn treatment apparatus in shuttleless loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention is a method for processing weft threads woven into a woven fabric immediately before the loom stops in a shuttleless loom such as a jet loom, a rapier loom, or a gripper loom. It is related to the device.

(Prior Art) Usually, shuttleless FLli machines such as jet looms have much higher productivity than frame looms, but have the problem of a high rate of weft insertion errors. In the event of a weft insertion error, the machine is stopped based on a weft insertion error detection signal from the weft detector, but in high-speed looms such as shuttleless looms, the machine is stopped at one stop in order to prevent damage to various parts. The machine is stopped after the inertia operates more than the rotation. For this reason, the weft yarns that have been inserted incorrectly (hereinafter referred to as "misplaced yarns") are beaten with a reed just before the machine stops and become weaving holes on the woven fabric.

Therefore, an example of a weft yarn processing device for removing the above-mentioned erroneous yarns from a woven fabric is described in the specification and drawings attached to Japanese Patent Application No. 1988-200986 by the applicant of the present invention.

The weft processing device described in the above specification and drawings includes a weft separation device that is provided with a weft separation member that enters from outside the warp shedding into the warp shedding and separates misplaced yarns from the front of the fabric into the warp shedding; A weft separating member for separating the woven fabric from the woven fabric into the warp opening, and a weft pulling device for pulling out and removing misplaced yarns from the inside of the warp opening to the outside of the warp opening are installed above the woven fabric. has been done. Further, this weft processing bag B is always held at the weft processing operation position.

(Problems to be Solved by the Invention) By the way, in order to separate one misplaced yarn from the fabric, delicate and accurate movement of the weft separation member is required. Therefore, it is desirable that the standby position of the weft separating member be as close as possible to the cloth fencing, and for this reason, the entire weft yarn processing device is disposed close to the cloth fencing.

This arrangement of the weft processing device with respect to the woven fabric hinders the splicing operation of the cut warp threads when warp threads are cut. That is, in most warp cutting situations, the warp threads on the warp beam side must be drawn out to the woven fabric side through a reed and connected to the warp threads on the woven fabric side. Therefore, if the warp corresponding to the lower part of the weft processing device is cut, the weft processing device becomes an obstacle, making the above-described thread splicing operation extremely troublesome. This hinders the high productivity of shuttleless machines, which are high-speed looms.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention creates a pleasant feeling of opening the warp threads to release the weft threads woven into the woven fabric immediately before the machine stops. In this state, in a shuttleless loom equipped with a weft processing device above the weaving front that separates the weft from at least the weaving front into the warp opening, a support rail is disposed in the weaving width direction above the weaving front, and the same is provided. The weft processing device is supported movably in the weaving width direction on a support rail, a retracted position is set to the side of the weft processing operation position of the weft processing device, and the weft processing device is fixed at the weft processing operation position. A structure is adopted in which a fixed holding means for holding the yarn is interposed between the weft processing device and the support rail.

(Function) Therefore, the weft processing device is always fixedly held at the weft processing operation position by the fixed holding means, and when a weft insertion error occurs, the weft processing device fixedly held at the weft processing operation position processes the weft. will be held. On the other hand, when warp yarn cutting occurs at a position corresponding to the weft processing operation position, the weft yarn processing device whose fixed holding by the fixed holding means is released is moved to a retracted position to the side of the weft processing operation position, The space at the weft processing operation position is largely opened. Therefore, even if the warp yarn is cut at a position corresponding to the weft processing operation position, a sufficient space for the yarn splicing operation is formed in the same way as at a position other than the weft processing operation position.

(Embodiment) Hereinafter, an embodiment embodying the present invention will be described in detail based on FIGS. 1 to 8.

As shown in FIG. 8, a large number of weft guide members 1 are arranged in parallel on a sleigh (not shown), forming a weft guide path≦. The weft inserted into the weft guide passage s7 from the weft insertion main nozzle (not shown) attached to one end of the sley is carried out by an auxiliary nozzle (not shown) disposed in the weft insertion direction facing the weft guide member l. (not) will be towed sequentially in a relay manner. When the weft yarn is inserted normally and reaches the end of the fabric on the side opposite to the main nozzle, the weft yarn is driven into the facing W1 of the woven fabric W by the reed 2.

Next, the weft yarns are woven into the woven fabric W and then cut by a cutter (not shown) provided near the main nozzle. Subsequent weft insertion continues in the same manner.

On the other hand, if a weft insertion error occurs in which the weft yarn does not reach the fabric edge on the side opposite to the main nozzle, the weft yarn detector (not shown) provided on the weft yarn guide member 1 located correspondingly near the fabric edge Detect mistakes.

Then, the machine is stopped based on a weft insertion error detection signal from the detector.

After the weft insertion error detection signal is issued, the machine rotates approximately once due to inertia and is stopped just before beating.

At this time, the misplaced yarn is inserted into the woven fabric W during the inertia operation of the machine, but the insertion of the weft yarn, which continues to be carried out from the main nozzle during the inertia operation of the machine, is detected when the weft insertion error is detected. Blocked based on signal.

As shown in FIG. 1, a pair of support brackets 3 are erected on both left and right side frames (not shown) of the machine stand, and a support rail 4 is installed between both brackets 3 in the weaving width direction. ing. A movable frame 5 is mounted on the support rail 4 so as to be movable in the weaving width direction. As shown in FIGS. 1 to 3, within the weaving width region, two auxiliary rails 12 are laid in series along the upper flif side edge of the support rail 4, with one auxiliary rail 12 spaced apart from each other.
A base plate 13 is fixed near one end of the auxiliary rails 12 and near the separated portions of both auxiliary rails 12, respectively.

A weft pull-out device 8 and a weft separation device 9 are respectively attached to both front sides of the movable frame 5 for pulling out and removing misplaced yarns when a weft insertion error occurs. Therefore, when the moving frame 5 is moved along the support rail 4 in the weaving width direction, the resetting device 8.9 is moved integrally. Thus, in this embodiment, the movable frame 5, the weft pulling device i! 2B, the weft separation device 9 constitutes the entire weft processing device M that is movable along the support rail 4.

As shown in FIG. 2, the movable frame 5 has both front and rear walls 5.
It is attached to the support rail 4 with the support rail 4 sandwiched between a and 5b. Further, a pair of roller shafts 11 are each tightened and fixed between both bearing portions 5d at the upper ends of the walls 5a, 5b, and a pair of rollers 6.7 are supported on the front sides of both shafts 11, respectively. The large diameter portions 11a of both roller shafts 11 can be engaged with both base plates 13, and when both diameter portions 11a are engaged with both base plates I3, as shown in FIGS. , both rollers 6.7 are spaced apart from both the auxiliary rail 12 and the support rail 4.

As shown in FIG. 1.4.5, a bearing portion 14 is provided at the lower left side of the movable frame 5 to protrude downward. A small diameter portion 15a at the base end of an eccentric shaft 15 is rotatably supported by the bearing portion 14, and a lock block 16 is loosely fitted into the large diameter portion 15b of the eccentric shaft 15. Further, a notch hole 5c is provided on the lower surface of the movable frame 5 on the surface corresponding to the lock block I6. The head of the lock block 16 is disposed through the notch hole 5c, and
The upper surface of the lock block 16 can engage with the lower surface of the support rail 4. A gripping rod 17 is attached to the tip of the eccentric shaft 15, and with both roller shafts 11 placed on both base plates 13, the 1.4.
As shown in FIG. 5, when the grip rod 17 is rotated to a horizontal position toward the front, the lock block 16 is pressed against the support rail 4, as shown in FIGS.

As a result, the weft processing device M becomes immovable.

Conversely, when the eccentric shaft 15 is rotated based on the rotation operation of the grip rod 17 in the state shown in Fig. 1.4.5, the lock block 16 moves downward and the support rail 4 is released. Thereby, the weft processing device M is switched to a movable state on the auxiliary rail 12.

Next, the weft pulling device 8 and the weft separating device 9 will be explained. As shown in FIG. Both frames 8a, 9a of re-equipment 8°9
A drive shaft 20 passing through is rotatably supported. One hanging bracket 19 has a drive motor 2 that can be rotated in forward and reverse directions.
1 is attached, and the driving force of the motor 21 is transmitted to the drive shaft 20 through the meshing of the drive gear 22 and the driven gear 23. Further, the drive motor 21 is operated based on the weft insertion error detection signal, and is rotated in the forward direction by a predetermined amount, and then rotated in the reverse direction by the same amount.

As shown in FIGS. 7 and 8, a shaft 25 is rotatably supported between the trident-shaped tips of a hanging bracket 24 that is fastened and fixed to the left side of the frame 8a of the weft pulling device 8. The rotation of the drive shaft 20 is on the same axis 25 as floats 26 and 27.
It is transmitted through the meshing of the A forked arm 28 is rotatably supported on a shaft 25 between the forked ends of the hanging bracket 24, and a shaft 30 is rotatably supported between the forked ends of the arm 28. is supported by

The rotation of the shaft 25 is connected to the shaft 30 by a timing pulley 29;
It is transmitted via the timing belt 32 and timing pulley 31. In addition, a balance weight 33 is fixed to the connecting base end of the bifurcated arm 28, and it comes into contact with two stoppers 34 and 35 fixed to the hanging bracket 24 in accordance with its rotation locus. The rotation of the bifurcated arm 28 is restricted by the stoppers 34 and 35.

In FIG. 7, the brake lining 37, which is biased leftward and fixed to the bifurcated arm 28 side, is in pressure contact with the brake lining 38 fixed to the shaft 30 side. Further, an arm 42 is fixed to the other end of the shaft 30.
A claw piece 4 for weft separation is attached to the tip of the weft thread through a leaf spring 43.
4 is attached.

Note that the overall configuration of the weft separation device 9 employs the same configuration as the partial configuration of the weft withdrawal device 8 up to this point, so a description thereof will be omitted.

As shown in Fig. 7.8, an air cylinder 47 is attached to the hanging bracket 46 which is tightened and fixed to the right side inside the frame 8a.
is supported. The bifurcated crank arm 4 is fixed to the front end of the rotating shaft 48 near the bottom of the air cylinder 47.
9 is adapted to be rotated by the retracting and protruding movement of the drive rod 47a of the air cylinder 47. This rotation is gear 6
0 and 61 to the shaft 59, and a support arm 62 fixed to the same shaft 59 is rotated. A driven roller 63 is rotatably supported at the tip of the arm 62.

A shaft 54 is rotatably supported on the right side of the hanging bracket 24, and a drive roller 55 is fixed to the center of the shaft 54, and a gear 56 is fixed to the front end. A drive gear 57a of a drive motor 57 disposed nearby is meshed with the gear 56. As shown in FIG. 7, a suction pipe 58 is disposed on the right side of the hanging bracket 24.

The suction device 158 is connected to a suction device (not shown) that is operated based on a weft insertion error detection signal. A suction port 58a of the suction pipe 58 is arranged on the lower surface side of the drive roller 55.

The driven roller 63 is always in the retracted position shown by the solid line in FIG. 7, and moves from the retracted position to the position shown by the two-dot chain line in the same figure as the support arm 62 rotates due to the operation of the air cylinder 47. , are pressed against the drive roller 55. Note that the air cylinder 47 is operated when the drive motor 21 is switched from normal rotation operation to reverse rotation operation. Further, the drive motor 57 is operated based on the weft insertion error detection signal, and when the drive roller 55 rotates in the direction of the arrow shown in FIG. be done.

Next, the operation of the weft processing device M configured as described above will be explained. In this embodiment, when a weft insertion error occurs, error thread processing is performed based on a mistake thread processing program.

Now, in the weft processing device M of this embodiment, the movable frame 5 is always fixedly held at the weft processing operation position at the left end of the support rail 4 by a fixed holding means consisting of an eccentric shaft 15 and a lock block 16. .

If a weft insertion error occurs in this state, the error yarn will be woven into the woven fabric W as described above. At the same time, weft insertion is prevented and the machine is stopped based on the weft insertion error detection signal. After the machine is stopped, the machine is automatically reversed once and a half, and the reed 2 is stopped at the most retracted position shown in FIG. With this reversal of the machine, the warp threads TI and T2 are brought into the maximum opening state, and the state in which the miss threads are held (weaved in) by the warp threads Tl and T2 is released.

Next, when the drive motor 21 is rotated in the forward direction, the drive shaft 2
0 is rotated, and the rotation is transmitted to the shaft 25 via the gear wheels 26 and 27 in the weft thread withdrawal device 8 and the weft thread separation device 9, respectively. Then, as shown in FIG.
5 and enters into the warp shedding while rubbing the fabric front W1 from outside the warp shedding along the path indicated by the dashed line. As a result, the erroneous yarn on the woven fabric Wl is caught by the claw pieces 44 of both devices 8 and 9. When the drive motor 21 continues to rotate forward, the rotation of the forked arm 28 is restricted by one stopper 35 . At this time, the rotational force of the drive shaft 25 overcomes the frictional force between both brake linings 37 and 38, and the pawl piece 44
0 along the path indicated by the dashed line, and as a result, a part of the miss yarn held in engagement with the claw pieces 44 of both devices 8 and 9 is pulled out from inside the warp opening to outside the warp opening. . In this way, after the missed yarn is pulled out by the claw pieces 44 of both devices 8.9, a part of the missed yarn caught on the claw pieces 44 of the weft thread pulling device 8 is moved between the drive roller 55 and the driven roller 63. The drawer is placed in the drawer.

At this time, the support arm 62 is rotated based on the operation of the air cylinder 47, and the driven roller 63 is rotated from the retracted position and brought into pressure contact with the drive roller 55. Therefore, the drive roller 5
The misplaced thread that was pulled out near roller 5 is caught as the driven roller 63 moves, and then
, 63. At this point, the drive motor 5
7 is activated based on the weft insertion error detection signal, the drive roller 55 is rotated, and the error yarn held in pressure contact with both rollers 55 and 63 is guided to the suction port 58a1 of the suction pipe 58, and then is passed through the suction device. When activated, it is sucked into the suction pipe 58. In this way, the miss yarns separated and pulled out from the woven fabric W by the weft pulling device 8 and the weft separating device 9 are removed from the warp by the cooperation of the rotation pulling action of both rollers 55°63 and the suction action of the suction pipe 58. The warp threads are sequentially pulled out from inside the opening to outside the warp opening and are suctioned and removed into the suction pipe 58.

During this time, when the drive motor 21 is operated in reverse, the claw pieces 4
4 and the forked arm 28 are integrally rotated counterclockwise around the shaft 25 while remaining in the state shown by the two-dot chain line in FIG. 8, and then returned to the retracted state shown by the solid line in the same figure. be done.

At this point, the drive motor 21 is stopped, and when all the misplaced threads are suctioned and removed into the suction pipe 58, the drive motor 57
The operation of the suction device and the suction device are respectively stopped, and the drive rod 47a of the air cylinder 47 is returned to its original position.

Thereafter, the loom is automatically reversed by a predetermined amount, stopped at the rotational position most suitable for restarting, and the loom resumes operation.

By the way, in the jet room equipped with the weft processing device M that performs the weft processing operation as described above, the warp TI corresponding to the lower part of the weft pulling device 8 or the weft separating device 9 that constitutes the processing device M.

T2 may be disconnected for some reason. In such a case, it is necessary to take out the end of the cut warp on the warp beam (not shown) side through the reed 2 to the woven fabric W side and connect it to the warp end on the woven fabric W side. . However,
When the weft processing device M is fixedly held at the weft processing operation position shown in FIG. 1, the piecing operation becomes extremely difficult.

Therefore, first, the grip rod 17 at the bottom of the moving frame 5
The eccentric shaft 15 is rotated based on the rotation operation. Then, the lock block 16 on the shaft 15 is switched from the pleasurable pressing state shown in FIG. 5 with the support frame 4 to the separated state shown in FIG. 6, and the weft processing device M is released from the immovable state. Next, the weft processing device M is pushed to the right in FIG. 1 along the support rail 4 via the moving frame 5. and,
When the moving frame 5 is slightly moved laterally, the engagement between the base plates 13 and the large diameter portions 11a of the roller shafts 11 is released, and the rollers 6.7 and the auxiliary rail 12 are brought into contact with each other. Ru. At this point, both rollers 6.7 can roll on the auxiliary rail 12, and if the pressure is continued with a slighter force than the initial pressure, the weft processing device M can easily move further to the side. be done. Therefore, the weft processing device M is retracted from its weft processing position to a side position. As a result, the space below the weft pulling device 8 or the weft separating device 9 is largely opened. That is,
The end of the cut warp on the warp beam side is passed through the reed 2 and the woven fabric W is passed through the reed 2.
Both devices 8 perform the splicing operation to connect the cut warp ends on the side
, 9 can be carried out without being hindered. For this reason,
The splicing operation can be carried out quickly in the same manner as in the parts other than the weft processing operation positions of both devices 8 and 9. Therefore, even when a warp yarn breakage occurs at the weft processing operation position of the weft processing bag 2M, it is possible to avoid a prolonged stoppage of the machine, and it is possible to prevent a decrease in machine operating efficiency. or,
In the weft processing operation position, the weft processing device M has both rollers 6.7 separated from the support rail 4 and the auxiliary rail 12, and both roller shafts 11 engaged on both base plates 13.
It has been h. Therefore, even if vibration occurs due to high-speed operation of the machine, the weft processing device M is stably supported on the support rail 4 without wobbling.

In addition, in the method in which the weft processing device Me is fixedly installed at a predetermined position above the woven fabric W1, there is also a need to downsize the weft processing device M in consideration of the ease of performing the yarn splicing work when warp yarn breakage occurs. come. However, in this embodiment in which the weft processing device M is retracted to the side from its weft processing operation position, there is no need to downsize the weft processing device M to secure a space to facilitate the thread splicing operation, and the weft Mechanism settings within the processing device M become easier.

Moreover, this invention can also be implemented as follows.

(a) As shown in FIG. 9, both the base plates 13 of the above embodiment are respectively fixed near the auxiliary rail 12 laid on the support rail 4 and the space between the auxiliary rails 12, and the movable frame 5 is moved on the left and right sides. Constructed to be movable in either direction.

(b) As shown in FIG. 10.11, the moving frame 5 is connected to the sliding member 64 having the ■-shaped groove 642 and its V-shaped groove 64.
(2) It should be configured to be movable through a sliding relationship with the rail 65 that can be engaged with the rail 65.

In this way, the configuration for moving the movable frame 5 can be simplified compared to the previous embodiment.

(c) The weft processing device is configured to be moved by the operation of a drive motor based on a detection signal from a warp cut detector and automatically retreat to a position other than the warp cut position.

(d) In addition to always arranging the weft processing device at the weft processing operation position and moving it to a retracted position to the side of the weft processing operation position when warp yarn breakage occurs, the weft processing device is always arranged at the retracted position. Then, the weft processing device is moved to the weft processing operation position only when a weft insertion error occurs.

Effects of the Invention As detailed above, even if the warp corresponding to the weft processing operation position of the weft processing device is cut, this invention can quickly splice the cut warp, and the operation of the loom can be carried out quickly. This has an excellent effect of avoiding a decrease in efficiency.

[Brief explanation of drawings]

1 to 8 show an embodiment embodying the present invention, FIG. 1 is a front view showing the entire weft processing device, FIG. 2 is a side sectional view showing the state in which the roller shaft and the base plate are engaged, Third
The figures are the same (a cutaway front view showing the state in which the roller shaft and the base plate are engaged, Figure 4 is a cutaway front view showing the pressed state between the lock block and the support rail, and Figure 5 is a cutaway front view showing the state in which the lock block and the support rail are in contact with each other).
6 is a sectional view taken along the line X-X in FIG. 4 showing the separation state between the lock block and the support rail, FIG. 7 is a cutaway front view showing the weft pulling device, and FIG. 8 is the same. FIG. 9 is a front sectional view showing another example; FIG. 10 is a front sectional view showing another example; FIG.
The figure is a sectional view taken along the Y-'/ line in FIG. Support rail 4, moving frame 5, roller 6.7, weft pulling device 8, weft separating device 9, roller shaft 11, auxiliary rail 12, base plate 13, six eccentric shafts 15, lock block 16, weft processing device M, warp TI , T2゜

Claims (1)

[Scope of Claims] 1. Weft threads that form an open state of the warp threads, release the weft threads woven into the woven fabric immediately before the machine stops, and in this state separate the weft threads from at least the front of the weave into the warp opening state. In a shuttleless loom equipped with a processing device above the weaving front, a support rail is arranged in the weaving width direction above the weaving front, and the weft processing device is supported movably in the weaving width direction on the support rail. , a retracted position is set to the side of the weft processing operation position of the weft processing device, and a fixed holding means for fixing and holding the weft processing device at the weft processing operation position is provided between the weft processing device and the support rail. A weft processing device in an interposed shuttleless loom. 2. The weft processing device is supported on the auxiliary rail via a roller that rolls on an auxiliary rail laid on the support rail at a position other than the weft processing operation position, and
In the weft processing operation position, the fixing means is supported on a base plate installed on the support rail, and the fixed holding means includes a lock loosely fitted coaxially with an eccentric shaft rotatably supported on the weft processing device side. In the shuttleless loom according to claim 1, the lock block is configured to be able to switch between a pressing position and a separating position with respect to the support rail by rotating the eccentric shaft. Weft processing equipment.