JPH055933B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a weft processing method in a shuttleless loom such as a fluid jet loom, a rapier loom, or a gripper loom.

Prior Art In general, the incidence of weft insertion errors in shuttleless looms aiming for higher speeds, especially fluid jet looms, is higher than in shuttled looms, and it is difficult to stop the loom to handle weft insertion errors. This goes against the productivity improvement that is the reason for the high-speed orientation. However, once a weft insertion error occurs, the machine must be stopped and the weft insertion error must be corrected in order to maintain the quality of the woven fabric. The loom is stopped based on a weft insertion error detection signal from the weft detection device, but in order to prevent damage to various parts of the high-speed loom, the loom is stopped after the loom has inertia operated for one rotation or more, so weft insertion errors are detected. The weft yarns (hereinafter referred to as miss yarns) are beaten before the machine stops and are woven into the woven fabric. Therefore, it is necessary to reverse the machine and release the grip of the misplaced thread by the warp threads to release the misplaced thread, but conventionally, this work of removing the misplaced thread has been done manually. However, since the misplaced yarns are driven into the woven fabric in the same way as normal weft yarns, even when the warp threads are brought into the maximum opening state, the state in which the misplaced yarns are held by the warp threads is not sufficiently released. Therefore, it is not easy to remove the misplaced threads, and the removal work is very complicated, which in turn increases the downtime of the loom and impedes productivity improvement.

Furthermore, if the warp threads are cut during weaving, or if the switch of the machine is artificially turned off, the loom will stop after inertial operation for one or more rotations as described above. During this inertial operation state, weft threads are also woven into the fabric, but since the loom is in a deceleration state, the beating state of the weft threads is different from that of other weft threads, resulting in defects such as weaving steps in the fabric. Therefore, it is desirable to also remove the weft threads woven during the inertial operation, but as mentioned above, this removal work is not easy.

Furthermore, as long as the weft processing is carried out manually, it is not possible to cope with the automation of the loom.

Purpose The present invention has been made in consideration of the above facts, and its purpose is to be able to separate erroneous threads from woven fabric without performing complicated manual work, and to cope with the automation of looms. It is an object of the present invention to provide a weft processing method in a shuttleless loom.

Composition In order to achieve the above-mentioned object, in the present invention, in a loom that is stopped based on a loom stop signal, a cutter is deactivated based on the stop signal so that the weft inserted immediately before the loom stops is left in an uncut state, After the machine stops, the warp threads are made open, and the weft threads that were woven into the fabric immediately before the machine stop are released from the weaving state.
The weft is gripped by a suction nozzle disposed on the weft supply side, and a weft separation member is inserted between the weft and the woven fabric from the weft insertion side, and the weft is separated from the woven fabric by the separation member. A method of separating the weft threads and removing the separated weft threads is adopted.

Embodiment Hereinafter, an embodiment in which the present invention is embodied in a fluid injection type loom will be described based on the drawings.A weft yarn Y supplied from a weft supply section (not shown) is measured in length by feed rollers 1 and 2. When the weft gripping gripper 4, which is opened and closed in synchronization with the weft insertion timing of the loom, is closed, the weft Y is ejected from the storage nozzle 3 and stored in the direction of the storage pipe 5 having the slit 5a. The weft yarn Y passing through the guide hole 6 and the gripper 4 passes through the auxiliary gripper 7, which is always in an open state, and is guided into the main nozzle 9 on the slay 8, which is reciprocally oscillated, and is activated in synchronization with the weft insertion timing. The weft is injected from the main nozzle 9 into the guide hole 10a of a large number of weft guide members 10 arranged in parallel on the sled 8. The auxiliary gripper 7 is opened and closed by an electromagnetic solenoid 11, and is closed when the loom is reversed.
It is designed to grip the weft Y.

When the weft yarn Y ejected from the main nozzle 9 is inserted normally and reaches the end of the woven fabric W on the side opposite to the weft insertion side, the weft yarn guide member The weft yarn escapes from the guide hole 10a of No. 10 through the slit 10b, and the weft yarn is driven into the front W1 of the woven fabric W by the reed 12 on the slay 8, and is woven into the woven fabric W. The material is cut by a cutter 13 provided near the cloth end on the weft insertion side. The subsequent weaving operations are then continued. Weft Y
If a weft insertion error occurs in which the weft does not reach the fabric edge on the opposite weft insertion side, the weft detection device (not shown) provided on the weft guide member 10 located near the fabric edge A weft insertion error is detected and the machine is stopped based on a weft insertion error detection signal from the detection device. The weft detection device is composed of light emitting and receiving elements arranged opposite to each other across the slit 10b of the weft guide member 10, and emits a weft insertion error detection signal when the weft does not pass through the slit 10b during beating. .

After the weft insertion error detection signal (also a machine stop signal) is issued, the machine rotates approximately one and a half times due to inertia and then stops. That is, when a weft insertion error occurs, the weft insertion error detection signal is issued while the reed 12 moves forward in the direction of the arrow from the most retracted position shown by the solid line in FIG. After that, the reed 12 once returns to the most retracted position, and then moves forward to the furthest point and stops just before hitting the reed. At this time, the miss yarn Y' is woven as shown in FIG. 3a. Note that the cutter 13 is temporarily put in an inoperative state based on the machine stop signal, and the miss yarn Y' is connected to the main nozzle 9 side without being cut and separated. During this inertial operation, weft insertion following the missed yarn Y' is carried out, and the weft yarn is ejected from the main nozzle 9, but this ejected weft yarn is placed near the main nozzle 9 as shown in FIG. It is sucked by the suction nozzle 14.
The nozzle 14 is actuated based on the machine stop signal, and is advanced from the retracted position to the weft path by a reciprocating device 15 such as an air cylinder or an electromagnetic solenoid.

Weaving W1 + weft separation device 1 on the side of the weft insertion side
6 is provided. The separating device 16 includes a geared motor 17, a belt 18 having a large number of meshing holes 18a at equal intervals that mesh with a gear 17a attached to a rotational output shaft of the motor 17, and a belt 18 fixed to the tip of the belt 18. It is composed of a weft separation member 19 and a container 20 that winds up and stores the belt 18 therein, and when the geared motor 17 rotates normally, the belt 1
8 is pulled out from the container 20, and the geared motor 17
When the belt 18 is reversed, the belt 18 is wound up and stored in the container 20. Weft separation member 1
Reference numeral 9 is constructed by bending a diamond-shaped plate material in its diagonal direction, and connecting both bent pieces with a pair of pins 21 and 22 for reinforcement. During normal operation of the loom, the weft separation member 19 is in the retracted position shown by the chain line in FIG.

Now, in this embodiment, when a weft insertion error occurs, it is automatically carried out based on the error thread processing program. Therefore, the operation of mis-thread processing when a weft-insertion error occurs will be explained below.

When a weft insertion error occurs, the erroneous yarn Y' is woven as shown in FIG. 3a as described above, and the suction nozzle 14 is
is advanced to the weft path, and the weft yarn ejected from the main nozzle 9 following the missed yarn Y' during the inertia operation of the loom is sucked into the suction nozzle 14. in this case,
The cutter 13 is placed in an inoperative state based on the machine stop signal, and the missed yarn Y' is connected to the weft yarn sucked into the suction nozzle 14 without being cut and separated. A weft yarn detection device (not shown) is provided inside the suction nozzle 14 and detects the weft suctioned into the nozzle 14 . Also, main nozzle 9
A cutter (not shown) is installed nearby.
It is activated at the same time as the machine is stopped, and the weft is cut between the main nozzle 9 and the suction nozzle 14 (in this case, the weft can also be cut at a predetermined time before restarting). . moreover,
At the same time as the machine stops, the auxiliary gripper 7 is closed, and the weft yarn is gripped by the gripper 7.

After the machine is stopped, the feed rollers 1 and 2 are separated by an air cylinder or solenoid (not shown) to eliminate the length measurement function, and then the loom is automatically reversed about one and a half times, and the reed 12 is moved as shown by the solid line in Figure 2. It stops at the most retracted position shown by . During this reversal, Gritsupa 4
is released, but since the weft yarn is gripped by the auxiliary gripper 7, the weft yarn is not pulled out in the weft insertion direction by the main nozzle 9 or suction nozzle 14 which is operable. When the machine stops due to a weft insertion error, the error yarn Y' is woven into the woven fabric W as shown in FIG. 3a.
When the machine is reversed, the warp threads T1 and T2 each move in the direction of the arrow in FIG. 3a, and when the reverse rotation is stopped, they reach the maximum opening state shown in FIG. 3b. Therefore, the grasping state of the misplaced yarn Y' by the warp threads T1 and T2, that is, the weaving state, is released, and the misplaced yarn Y', which has been suctioned and held by the suction nozzle 14 in the above, is moved between the suction nozzle 14 and the woven fabric W. It is stretched out.

After the machine is reversed, the geared motor 17 is rotated in the forward direction, and the weft separation member 19, which is in the retracted position shown by the chain line in FIG. 1, is inserted into the warp opening from the weft insertion side. suction nozzle 14
and the woven fabric W, the weft separation member 19 is inserted between the missed yarn Y' and the woven fabric W, and as the separation member 19 is inserted, the weft separation member 19 As shown in Figures 4 and 5, the incorrect thread Y' is attached to pin 2.
1 and is separated from the woven fabric W toward the warp opening side. When the weft separation member 19 reaches the fabric end on the side opposite to weft insertion, the miss yarn Y' is completely separated from the woven fabric W, the geared motor 17 is operated in reverse, and the belt 18 is accommodated in the storage body 20. , the weft separation member 19 returns to the retracted position.

When the missed yarn Y' is completely separated from the woven fabric W, it is suctioned and removed by the suction nozzle 14. Then, the weft detection device in the nozzle 14 does not detect the weft, and based on this result, the suction nozzle 14 is returned to the retracted position by the reciprocating device 15.

When the erroneous yarn is removed by suction and the weft separation member 19 returns to the retracted position, the machine is automatically reversed by a predetermined amount and stopped at a rotation position most suitable for restarting. Then, after the auxiliary gripper 7 is opened to enable weft insertion, the operation of the loom is automatically restarted.

As described above, in this embodiment, when a weft insertion error occurs, the erroneous yarn Y' is stretched between the suction nozzle 14 and the woven fabric W, and the weft separation member 19, which is in the retracted position, is moved during normal operation of the loom. Mistake yarn Y′ and woven fabric W
By inserting from the weft insertion side between the woven fabric W
Since the erroneous yarn Y' is separated from the woven fabric, the complexity associated with the conventional work of manually separating the erroneous yarn from the woven fabric is eliminated, and the erroneous yarn processing can be performed automatically. Therefore, the present invention can cope with the recent trend toward automation of looms, and can also reduce the stop time of high-speed looms for the purpose of improving productivity, and can also cope with the trend toward higher speeds of looms. It's something you get.

In addition, in the above embodiment, the erroneous thread is removed from the suction nozzle 14.
However, the structure of the holding means is not limited to this. For example, in order to further ensure suction and holding, a mechanical means similar to the auxiliary gripper 7 may be used near the suction nozzle 14. In short, any configuration is acceptable as long as the mis-thread Y' is stretched between a predetermined position on the weft insertion side of the machine and the woven fabric W.

Further, in the embodiment described above, the mis-thread processing is automatically carried out, but the geared motor 17 may be operated by button operation to reverse the rotation of the machine due to a weft-insertion mistake.

Further, in the present invention, instead of the weft separating member 19, a roller or a belt 18 is used.
Alternatively, a rack may be used instead of the container 20, and a weft separation member may be provided at the tip of the rack.

Although the present invention has been embodied in the processing of mis-threads in the above-mentioned embodiments, it is not limited to the processing of mis-threads, but also the wefts that are woven during inertial operation when the machine is stopped due to warp cutting during weaving or when the machine is artificially stopped. It is also possible to implement the case where it is removed to prevent weaving steps, etc.

In the above example, the machine was reversed to remove the misplaced threads, but the machine was stopped before weaving the warp into the woven fabric.
If the warp is opened during this stop, the weft can be removed without reversing the machine.

Effects As described in detail above, the present invention reverses the loom to release the weft yarns woven into the woven fabric, and also allows the weft yarns to be removed from the weft supplying section without cutting the weft yarns at the cloth end on the weft insertion side. and the woven fabric, a weft separation member is inserted between the weft and the woven fabric from the weft insertion side, and the separation member separates the weft from the woven fabric. This makes it possible to separate erroneous threads from the woven fabric without any complicated work, and also to cope with the recent trend towards automation of looms.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view showing an embodiment embodying the present invention, Fig. 2 is a side view, and Figs. 3 a and b.
4 are vertical cross-sectional views showing the vicinity of the front of the woven fabric.
The figure is a plan view showing the weft separation device, and FIG. 5 is a rear view as well. Weft separation device 16, weft separation member 19, missed yarn
Y′, woven fabric W;

Claims (1)

[Scope of Claims] 1. In a loom that is stopped based on a loom stop signal, the cutter is deactivated based on the stop signal to leave the weft inserted immediately before the loom stop in an uncut state, and after the loom stops, the cutter is inactivated. The weft is released from the weft state that was woven into the fabric immediately before the machine stopped by forming an open state of the warp, and the weft is gripped by a suction nozzle disposed on the weft supply side. A shuttleless loom characterized in that a weft separation member is inserted between the weft and the woven fabric from the weft insertion side, the separation member separates the weft from the woven fabric, and the separated weft is removed. Weft processing method. 2. The weft separation member is fixed to the tip of the belt wound and stored in the container, and is inserted into the weft by the operation of a geared motor that meshes with a number of meshing holes provided in the belt. A weft processing method in a shuttleless loom according to claim 1.