JPH0733615B2 - Weft processing method for shuttleless loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a method for treating a weft yarn woven into a woven fabric in a shuttleless loom such as a jet loom, a rapier loom, or a gripper loom, immediately before the stop of the loom. It is about.

(Prior art) It is possible to expect much higher productivity for shuttleless looms such as jet looms compared to shuttleless looms, and the trend of adopting shuttleless looms has been remarkable in recent years, but weft insertion error rate It is a well-known fact that it is higher than that of a shuttlecock loom. When a weft insertion error occurs, the machine is stopped based on the weft insertion error detection signal from the weft detector, but in high-speed weaving machines such as a shuttleless loom, one machine revolution or more is taken into consideration to prevent damage to each part. Since the machine base is stopped after the inertial operation, a weft thread that has been miss-inserted (hereinafter referred to as a miss thread) is beaten and woven into a woven fabric immediately before the machine base is stopped.

Japanese Patent Application Laid-Open No. 58-220856 discloses a weft processing device that removes from the woven cloth the above-mentioned miss yarns, which become woven marks of the woven cloth.

In this conventional example, a weft processing device having one finger for separating the miss yarn woven into the woven fabric from the woven fabric is provided on a guide rail provided in the weft width direction from a retracted position to a predetermined miss yarn. After traveling to the processing position, slide the cloth on the woven cloth and rub the front side of the cloth from the outside of the warp opening to insert the finger into the warp opening so that the miss yarn is separated from the woven cloth into the warp opening. Has become.

(Problems to be solved by the invention) In such a miss yarn processing operation of the weft yarn processing device, the woven state of the miss yarn woven in the front of the woven fabric is released, and the reed on the sley and the above Since it is necessary to avoid contact with the weft yarn processing members such as fingers, it is necessary to form the warp shed by retracting the sley from the cloth fell to a predetermined position. The sley must be retracted before the weft processing device starts the miss yarn processing operation, but the miss yarn processing operation of the weft processing device is performed when the sley has not retracted to a predetermined position for some reason. If so, the weft processing member and the reed and the like on the machine stand side contact with each other, and damage to these members cannot be avoided. The occurrence of such an accident is of particular concern in the automation of miss yarn processing.

Configuration of the Invention (Means for Solving the Problems) In the present invention, therefore, the weft yarn is woven in a state in which the weft yarn woven in the woven fabric is released before the machine stand is stopped by forming the open state of the warp yarn. On the sley in the weft processing operation locus region of the weft processing member that performs weft processing such as weft separation and withdrawal before the operation of the weft processing device that pulls out the separated weft from the inside of the warp opening to the outside of the warp opening. Of the weaving member is detected, and if the weaving member is in the weft processing operation locus region, the weft processing operation of the weft processing device is stopped, and the weaving member is placed in the weft processing operation locus region. If not, the weft processing operation of the weft processing device is performed.

(Operation) That is, whether or not a woven member such as a reed on the sley exists at a predetermined position outside the weft processing operation locus region of the weft processing member is confirmed by a detection means such as a proximity switch or a photoelectric switch, When the woven member is present at the predetermined position, the weft processing operation of the weft processing device is performed. If the weaving member is not present at the predetermined position, the operation of the weft processing device is stopped.

(Embodiment) An embodiment in which the present invention is embodied in a jet loom will be described below with reference to the drawings.

In FIG. 1, a reed 2 is erected on a sley 1 that reciprocally swings between a beating position shown by a solid line and a last retracted position shown by a chain line, and a large number of weft guide members 3 are provided in parallel. The weft yarn injected from the main weft-inserting main nozzle (not shown) into the weft guide passage formed by the row of the guide holes 3a of the guide member 3 is repulsed by the reed 2 on the cloth cloth W1 It is supposed to be done.

As shown in FIG. 3, a supporting brat 4 is erected on a machine frame side frame (not shown) on the weft inserting main nozzle side, and a supporting arm 5 is provided on an inner surface of an upper end portion of the weaving width of the loom. It is protrudingly supported in the direction. A drive motor 6 capable of rotating in the forward and reverse directions is fixed to the outer surface of the support bracket 4, and a drive shaft 6a thereof is provided so as to project through the inside of the support arm 5. A weft processing device 7 and a bearing 8 are suspended and supported by the support arm 5, and a shaft 9 is rotatably supported by the weft processing device 7 and the bearing 8. A driven gear 10 is fixed to a drive shaft 6a of a drive motor 6 at one end of the shaft 9
The rotation of the drive motor 6 is transmitted to the shaft 9.

A bifurcated suspension bracket 12 is suspended and supported on the support arm 5 in the weft processing device 7.
A shaft 13 is rotatably supported between the forked ends of the shaft. A bifurcated arm 14 is rotatably supported on the shaft 13, and a shaft 15 is rotatably supported on a bifurcated end of the arm 14. Then, the rotation of the shaft 9 is transmitted to the shaft 13 via the gears 16 and 17, and the rotation of the shaft 13 is transmitted to the timing pulley 18,
Shaft 15 via timing belt 19 and timing pulley 20
To be transmitted to. The shaft 15 is biased to the right in FIG.
The brake lining 22 fixed to the 14 side and the brake lining 23 fixed to the shaft 15 side are pressure-bonded.
A claw piece 24 is attached to one end of the shaft 15 via an arm 25 and a leaf spring 26.

A balance weight 27 is fixed to the base end of the bifurcated arm 14, and the turning range of the bifurcated arm 14 is restricted by contacting a pair of stoppers (not shown).

A suction pipe 29 connected to a suction device S (not shown) is supported on a suspension bracket 28 suspended from the support arm 5 on the left side of the suspension bracket 12. A pair of substantially L-shaped gripping levers 30 and 31 are rotatably supported behind the suction port 29a of the pipe 29, and one gripping lever 30 is connected to a drive rod 32a of an air cylinder 32. At the same time, the other gripping lever 31 is urged to rotate counterclockwise by the tension spring 33. A stopper 34 is provided on the inner wall of the rear frame of the weft processing device 7,
The counterclockwise rotation of the grip lever 31 is restricted.

A mounting bracket 35 is fixed to the outer wall of the rear frame of the weft processing device 7, and a proximity switch 36 is provided on the bracket 35. The switch 36 transmits an ON signal when it faces the upper end of the reed 2, and this ON signal is input to the control device C for controlling the weft processing device 7 shown in FIG.

Now, the claw piece 24 of the weft processing device 7 and the pair of gripping levers 3
As shown in FIG. 1, 0 and 31 always stand by at a standby position deviated from the rocking locus region of the weaving member such as the reed 2 and the weft guide member 3 on the sley 1 that reciprocally rocks during operation of the loom. ing. When a weft insertion error occurs, the machine frame is stopped based on a weft insertion error detection signal from a weft thread detector (not shown), but the miss yarn Y is woven W during the inertial operation until the machine frame is stopped.
Is woven into. The weft insertion of the weft that is about to be ejected from the weft insertion main nozzle following the miss yarn Y is blocked on the side of the weft measuring and storing device.

The machine stand is stopped immediately before the beating, and after this stop, the machine stand is rotated about once and a half times. This reversing of the machine causes the reed 2 to stop at the last retracted position shown by the chain line in FIG.
2 forms the largest aperture. Therefore, the gripped state of the miss yarn Y by the warp yarns T1, T2, that is, the weaving state is released.

After reverse rotation of the machine stand, a miss thread removal start signal is sent and the fifth
As shown in the figure, the miss yarn removal start signal is input to the control device C. Thereby, the control device C confirms the presence or absence of the ON signal from the proximity switch 36. Reed 2 as shown in FIG.
When is moved to the predetermined last retracted position, the ON signal is input from the proximity switch 36 to the control device C. Therefore, the control device C confirms the ON signal and confirms that the drive motor 6,
An operation command is issued to the air cylinder 32 and the suction device S. Based on the operation command from the control device C, the drive motor 6, the air cylinder 32 and the suction device S perform a preset weft processing operation. That is, first, the suction device S is actuated, the drive rod 32a of the air cylinder 32 is actuated in the protruding direction, and both gripping levers 30 and 31 are arranged from the standby position to the positions shown in FIGS. Then, the forward rotation of the drive motor 6 causes the claw piece 24 to rotate integrally with the forked arm 14 around the shaft 13 in the clockwise direction in FIG. 1, and along the path indicated by the arrow P in FIG. It enters the inside of the warp opening while rubbing the front cloth WI from the outside of the warp opening. As a result, the miss thread Y on the cloth W1
Hooked on 24. When the forward rotation of the drive motor 6 continues further, the balance weight 27 comes into contact with one of the stoppers (not shown), and the rotational force of the shaft 9 causes the both brake linings to rotate.
Overcome the frictional force between 22,23. Therefore, the claw piece 24 rotates about the shaft 15 along the path indicated by the arrow Q in FIG.
As shown in the figure, a part of the miss yarn Y is pulled out of the warp yarn opening. The drive motor 6 subsequently enters a reverse rotation operation, and the claw piece 24 moves integrally with the bifurcated arm 14 about the shaft 15 along the path R in the figure. During this time, the drive rod 32 of the air cylinder 32
a operates in the retracting direction, and both gripping levers 30 and 31 grip and pull out the missed yarn Y pulled out of the warp yarn opening. Then, the miss yarn Y is disengaged from the claw piece 24, and its bent tip portion is sucked and introduced into the suction port 29a of the suction pipe 29. When the bifurcated arm 14 comes into contact with the other stopper (not shown), the claw piece 24 returns to the standby position along the path U in the figure with the shaft 13 as the center, and both gripping levers 30, 31 move to the fourth position. It is arranged again in the position shown in the figure, and the remaining miss yarn in the warp yarn opening is sucked and removed into the suction pipe 29.

If reed 2 has not retracted to the final retracted position,
The ON signal is not transmitted from the proximity switch 36. Therefore, the control device C does not issue an operation command to the drive motor 6, the air cylinder 32 and the suction device S, and the weft processing device 7 does not perform the weft processing operation.

Before performing the weft processing operation of the weft processing device 7, it is detected whether or not the reed 2 is retracted to a predetermined final retracted position, and the claw piece 24 of the weft processing device 7 and the grip levers 30 and 31 of the weft processing member. In this embodiment for confirming that the weaving member on the sley 1 does not exist in the processing operation locus, the contact between the weft processing device 7 and the weaving member on the sley 1 is surely avoided, and the weaving member or the weft yarn is surely avoided. The processing device 7 is not damaged. The occurrence of such a situation should be particularly taken into consideration in the automation of the weft yarn processing, and in this embodiment, after the controller C confirms that the ON signal is not present, the reed 2 is retracted to a predetermined final retracted position, and the miss yarn processing is performed. If the program is set, the miss yarn processing program can be executed without fear of occurrence of the above situation.

Of course, the present invention is not limited to the above-mentioned embodiment, for example, other detection means such as a photoelectric switch is adopted instead of the proximity switch, or the last retreat position detection of the reed is detected from the rotation angle of the machine base. You may do it. An absolute encoder or the like may be used as this machine rotation angle detecting means.

Further, the present invention is applied to a shuttleless loom equipped with a weft processing device that pulls out and removes the miss yarn from the side of the warp shed, and the machine base is stopped to prevent the weft in the machine stop other than the occurrence of a weft insertion error. The present invention can also be applied to a case where the weft yarn inserted immediately before is removed. In this case, the one having the weft loosening device above the warp has the same effect as that of the above-mentioned embodiment, and the one not having the weft loosening device also performs the weft processing operation after confirming the open state of the warp. As a result, the success rate of the processing operation can be increased.

Effect of the Invention As described in detail above, in the weft processing method of the present invention, the weft processing member on the weft processing device side and the weaving member on the machine base side are reliably avoided from being in contact with each other to prevent damage to these members. Further, it has an excellent effect that the reliability of the weft processing action can be enhanced.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a side sectional view showing a standby state of a weft processing device, FIG. 2 is a side sectional view showing a weft processing operation of the weft processing device, and FIG. FIG. 3 is a front sectional view of the weft processing apparatus, FIG. 4 is a front sectional view of an essential part showing the middle of the weft processing operation of the weft processing apparatus, and FIG. 5 is a block diagram. Sley 1, reed 2 as a weaving member, weft processing device 7, proximity switch 36, miss yarn Y.

Claims (1)

[Claims] 1. The warp yarns are separated from the cloth fell in a state where the warp yarns are opened and the weft yarns woven in the woven fabric are released before the machine stand is stopped, and the separated weft yarns are separated from each other in the warp yarn opening. In a shuttleless loom equipped with a weft processing device that pulls out from the warp to the outside of the warp opening, on the sley in the weft processing operation locus region of the weft processing member that performs the weft processing such as separating and withdrawing the weft before operating the weft processing device. The presence or absence of the weaving member is detected, and the weft processing method for a shuttleless loom is selected based on the detection result.