JPS62282045A - Fluid jet type loom equipped with mistake yarn traction and removing apparatus - 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 3. Detailed Description of the Invention (Industrial Field of Application) The present invention is directed to the yarn end of a weft yarn inserted into the weft using a plurality of catching yarns arranged on the opposite side of the weft insertion side in the warp series. The yarn end catching device has a yarn end catching device for catching the yarn, and further includes a mistake yarn pulling and removing device for pulling and removing the misplaced yarn from the side opposite to weft entry of the yarn end catching device when a weft insertion mistake occurs during weaving. Regarding the fluid injection type loom.

(Prior Art) As shown in Japanese Patent Publication No. 39-29654, the yarn end catching device has a plurality of catching yarns arranged on the opposite weft entry side of the warp series (opposite the weft entry nozzle). is inserted into a twister placed on the side of the loom, and while being pulled toward the front of the loom (toward the woven fabric side), the caught yarn is inserted between the twister and the heddle at almost the same timing as the warp series. The weft insertion ends when the weft ejected from the weft insertion nozzle passes through the warp opening and the catching yarn opening, and then the catching yarn closes together with the warp. The yarn end of the inserted weft yarn is woven into the weft, and the yarn end is captured by twisting the weft yarn.
This is used in a mis-thread removal processing device such as that disclosed in Japanese Patent No. 7351.

This error yarn removal processing device abnormally stops the loom when a weft insertion error occurs during weaving, and then reverses the rotation to approximately the maximum opening phase angle of the warp just before the error yarn was beaten, and removes the error yarn. The loom is exposed on the front of the weave, the exposed mis-thread is pulled out and removed by a traction device, and then the main shaft of the loom is adjusted to a predetermined phase angle and restarted. Some or all of these operations can be performed automatically. Let them do it.

Furthermore, the applicant has previously proposed the following error yarn removal processing device (Japanese Patent Application No. 60-141570). This device removes weaving from a fluid jet nozzle when the abnormal stop occurs due to a weft insertion error. The preceding weft yarns are stopped without being cut, and then the missed yarns are exposed on the fabric front, and more than 2 wefts worth of weft yarns are injected from the weft insertion nozzle. Therefore, this weft thread is turned over from the fabric front while being connected to the miss thread, forms a U-shape between the weft thread and the fluid jet nozzle, and is inserted into the opening between the warp thread and the catching thread. The top of this U-shape is then pulled by a mis-thread pulling/removal device disposed on the side opposite to the weft entry side of the caught yarn. Due to this traction, the misplaced yarns that have been driven into the woven fabric are sequentially pulled off from the above-mentioned reversal section and removed, and as a result, the inserted weft yarns are stretched straight between the weft insertion nozzle and the misplaced yarn traction device. . When this stretched weft is cut near the weft insertion nozzle, the inserted weft is pulled and removed together with the missed yarn. This device has an excellent ability to peel off misplaced threads by pulling them from the above-mentioned reversing section.

[Problem that the invention seeks to solve]

By the way, in a fluid injection type loom equipped with such a yarn end catching device and a mis-thread traction removal device, the loom may malfunction even though weft insertion has been performed normally due to a detection error in the weft yarn detector. If a so-called idle stop occurs, there is a problem in that the catching thread will break after restarting.

This is because when the above-mentioned idle stop occurs, the above-mentioned error yarn removal processing device automatically operates to remove the relevant weft yarn (pseudo-error yarn), but at this time, the pseudo-error yarn has been inserted normally. The end of the thread is woven into the catching thread and is in a state where it is difficult to separate. Therefore, there may be a case where this pseudo-mistake yarn is connected to the mis-thread pulling and removing device while being tethered to the caught yarn. If the loom is restarted in this state, the twisting movement of the twister causes the weft yarn to be transferred to the mis-thread traction removing device. As it is being pulled out, it winds around the catching thread and forms a lump, and if the catching thread is pulled while the lump cannot pass through the twister, it will eventually break.

If the captured thread is cut, it cannot be automatically repaired, so the loom must be stopped until a worker arrives, which reduces operating efficiency.

Therefore, an object of the present invention is to prevent the formation of lumps as described above.

[Means for solving problems]

The means of the present invention which solves the above problem is that a yarn cutter is disposed facing the yarn path leading from the yarn end catching device to the mis-thread pulling and removing device.

[Effect]

According to the above-mentioned means, when the weft yarn is connected to the mistaken yarn traction removal device while being tethered to the yarn end catching device as described above, the yarn cutter disposed in the yarn path cuts it. The weft yarn is no longer pulled out of the erroneous yarn traction and removal device, so that winding in a lump is avoided.

〔Example〕

Hereinafter, an example of a water jet loom equipped with the above-mentioned misthread removal processing device and an embodiment of the present invention applied to the loom will be described with reference to the accompanying drawings.

In Fig. 1, Y is the warp, W is the weft, C is the woven fabric,
F indicates woven fabric. The main shaft 1 of the loom is rotationally driven by a main motor 2, and an electromagnetic brake 3 attached to the main shaft 1 is released by a start command of the main motor 2 and braked by a stop command. The main axis l is the heald 6. In addition to driving the reed 7 back and forth, it also drives various rotating elements that will be described later.

Reference numeral 1O denotes a water supply path for weft water, and a constant water level tank 1'l receives tap water from a water pipe 14, and supplies it via a check valve 15 while maintaining a predetermined water level with its float valve 12. Weft water is supplied to the pipe line 16. Feed line 16
A plunger type weft insertion pump 17 installed in the rotary cam 1
8 to perform a suction stroke, and a built-in spring to perform a discharge stroke in accordance with the weft insertion period. This discharged water is fed to a weft insertion nozzle (water injection nozzle) 20 fixed to the loom frame of the loom. Further, the feed pipe line 16 is connected to the check valve 1.
5 to the bottom of the sub-tank 21, and the upper part of the tank 21 is communicated with the pressurized air source 8 via a three-way solenoid valve 22 and a regulator 23, which are always open to the atmosphere. Therefore, weft water is always stored in the sub-tank 21 at the same water level as in the constant water level tank 11, and the storage amount is set to a predetermined value by adjusting the vertical position of the tank.

Furthermore, a normally closed relief valve 24 is connected to the water supply path lO downstream of the weft input pump 17, and a normally open cutoff valve 25 is provided further downstream. These valves 24 and 25 are solenoid valves that operate in pairs, and when an activation signal is sent, the cutoff valve 25 closes and the relief valve 24 opens at the same time.

Reference numeral 30 is a rotating drum type weft length measuring and storage device. The drum 31 of the device 30 is driven at a predetermined circumferential speed from the main shaft 1 via a permanently connected electromagnetic clutch 32 and a belt transmission means 33, and can also be driven from a winding motor 34 via an electromagnetic clutch 35. can. The electromagnetic clutch 35 is always open and is engaged at the same time as an operation command is sent to the winding motor 34. Then, by pinching the weft yarn W from the yarn feeder 36 between the drum 31 and the presser roller 37, the length of the weft yarn is measured while drawing it out at the same speed as the peripheral speed of the drum, while blowing air from the blower 38 to the tip of the drum. The weft yarn is introduced into an annular cover 39 with a groove-shaped cross section surrounding the drum, and a swirling airflow is generated in the cover in the same direction as the rotating direction of the drum, so that the weft yarn taken out is wound around the drum and stored. This weft is further connected to a yarn guide 40 and a gripper 41.
After that, it is inserted into the weft insertion nozzle 20. gripper 41
is reciprocated by the rotating cam 42 to release the weft during the weft insertion period.

Reference numeral 50 denotes a yarn end catching device, which pulls several catching yarns 51 pulled out from a plurality of yarn feeders (not shown) through the heddles 6, and then pulls them through the heddles 6, and then pulls them through the heddles 6, and then pulls them through the healds 6. The threads are passed through a twister 52 rotatably supported in the front and converged, thereby imparting an opening/closing motion to the captured threads 51. Furthermore, twister 5
2 is rotated to twist the captured yarn bundle in the insertion portion, and after turning it by the guide roller 53, it is pulled by the traction device 54 and removed from the machine. This pulling speed is set slightly higher than the advancing speed of the woven fabric C.

Reference numeral 45 denotes a weft thread cutting cutter which cuts and separates the weft thread continuous from the fabric front F to the weft insertion nozzle 20 immediately after beating the reed.A cut prevention means 46 is attached to this cutting cutter to prevent the above-mentioned cutting movement. can be prevented. A yarn end cutter 47 cuts the yarn end of the inserted weft yarn several times after weft insertion. 4
Reference numeral 8 denotes an electrode-type weft detector disposed between the warp yarns Y and the captured yarns 51 and attached to the front surface of the reed 7.

Reference numeral 60 denotes a mistaken yarn traction removal device, in which one side of an L-shaped suction head 61 is opened facing the weft insertion nozzle 20, and the other side is connected to a discharge pipe 63 via a filter 62, and a discharge pipe. An air nozzle 64 is attached toward the air nozzle 63. The air nozzle 64 is connected to the pressurized air source 8 via a normally closed solenoid valve 65 and a regulator 66.

Reference numeral 70 is a thread cutter. The yarn cutter 70 in this example is razor-shaped, and when the weft yarn is stretched from the twister 52 or its vicinity to the suction head 61 and becomes tense, the yarn path Wa
It is fixed to the loom stand so that the cutting edge can be seen.

The embodiment is configured as described above. Next, the effect will be explained.

Note that the operating phase angle of the loom (rotational phase angle of the main shaft 1) is calculated from the beating time of 0 @, the maximum opening time of the warp Y is 180', and the detection time of the weft yarn detector 48 is about 330° cut. It is assumed that the weft cutting timing by the cutter 45 is set to lθ''. Also, during the error thread removal process, the loom control device (not shown) controls the phase angle sensor 5 such as an encoder provided on the main shaft 1. Upon receiving the signal, as will be described later, a corresponding operation instruction is given at a corresponding time.

When the loom is operating normally, when the weft insertion time approaches during the backward stroke of the reed 7, the weft insertion pump 17 moves to the discharge stroke and water injection from the weft insertion nozzle 20 starts, indicating that the weft insertion time has arrived. At the same time, the gripper 41 releases the weft W. As a result, the weft corresponding to one pick, which has been wound and stored on the drum 31 of the weft length measuring and storage device 30, is ejected from the weft insertion nozzle 2o, and passes through the opening between the warp Y and the catching yarn 51.

Here, the gripper 41 grips and brakes the weft yarn, and at the same time or slightly prior to this, the discharge stroke of the weft insertion pump 17 ends, and weft insertion is completed. In this process, the reed 7 moves past the warp maximum opening phase of 180 degrees and moves forward, and on the way, the weft detector 48 comes into contact with the weft at the 330'' point and detects the presence of the weft.The reed 7 moves forward. Subsequently, the weft yarn is driven into the fabric front F at 0°, and immediately after that, at 10°, the cutting cutter 45 operates to separate the weft threads connected to the weft insertion nozzle 20.

On the other hand, the catching yarn 51 closes slightly prior to beating and weaves in the yarn end of the inserted weft yarn, and furthermore, by the twisting movement, this yarn end is firmly caught, and as described above, it is faster than the advancing speed of the woven fabric C. It is being towed at high speed. As a result, tension is applied to the weft yarn, and after several picks of the beating, the yarn end cutter 47 is operated to cut off the captured yarn end from the weft matrix.

If a weft insertion error occurs during the above operation, the above 330
', the weft detector 48 detects the absence of yarn, and in response to this detection signal, the weft detector 48 detects the absence of yarn, and upon receiving this detection signal, the cut prevention means 46
is operated for a predetermined period of time. This prevents the cutting movement of the cutter 4'5. Further, the cutoff valve 25 is closed to stop the weft insertion function, and the stop phase angle is set to 300° to instruct the main motor 2 to stop abnormally. As a result, reed 7 reeds the erroneous yarn related to the weft insertion error, and then reeds 1
It passes the phase position of 80' and stops at the next 300° [Figure 2 (A)]. Reference numeral M in the figure indicates a miss yarn, and by preventing the above-mentioned cut, the next operation is sequentially performed in accordance with instructions from the zero-thread control device connected from the fabric front F to the weft insertion nozzle 20.

(1) After releasing the electromagnetic clutch 32 and separating the weft length measurement and storage device 30 from the main shaft 1, the winding motor 34 is rotated for a predetermined period of time to store more than two picks worth of weft on the drum 31, At the same time, the main motor 2 is reversely rotated at low speed and stopped at a phase position of 180'', just before the misplaced yarn M is beaten.In other words, at this phase position, the warp opening becomes maximum and the misplaced yarn M is woven. to be exposed in front of
Figure 2 CB)).

(2) Open the solenoid valve 65 of the mis-thread pulling removal device 6o to inject air from the air nozzle 64, and use the jet pump action to suck outside air into the suction head 61. The zero-order water supply path 10 is shut off. The valve 25 is opened and the three-way solenoid valve 22 is switched to the pressure air source 8 side for a predetermined period of time. As a result, the water stored in the sub-tank 21 is fed under pressure to the feed pipe line 16, and the weft entry nozzle 2o injects it. At this time(
180°) Since the gripper 41 is open, the stored weft yarn exceeding the amount of two picks is ejected, and is inserted into the opening between the warp yarn Y and the catching yarn 51 in a U-shape, and the top of the weft yarn is inserted into the suction head. 61 and is towed [Fig. 2 (C)]. Therefore, the folded portion A of the missed yarn M is successively torn off and removed from the fabric front F under the above-mentioned traction action, and when this removal is completed, the inserted weft yarn is connected to the weft insertion nozzle 20 and the suction head 61. [Figure 2 (D)]
).

(3) Rotate the main motor 2 forward to a phase angle of lo°.

At this 10°, the cutting cutter 45 operates to separate the inserted weft from the weft insertion nozzle 20 (FIG. 2(E)).

(4) Reverse the main motor 2 again and step (
1) Bring the phase position to 180°.

In this process, the cut-off insertion weft becomes exposed on the fabric front, so it is sucked into the rad 61 and removed (
Figure 2 (F)).

(5) The main motor 2 is further reversed to pass the phase angle Oo and then stopped at a restart phase angle of 300''. At this point, the weft that was beaten just before the mistake M appears on the fabric F [
Figure 2 (G)].

(6) The winding motor 34 is rotated for a predetermined period of time to store weft yarns equivalent to one big on the drum 31 [Second
After engaging the electromagnetic clutch 32 and, if necessary, switching the three-way electromagnetic valve 22 to the pressure air source 8 side for a predetermined period of time to fill the water supply path 10 with weft insertion water, the loom is restarted. Start it.

As described above, the above-mentioned operation is automatically performed even when the weft yarn detector 48 makes a detection error and the yarn goes up the room. Figure 3 shows the operating mode in this case.
The symbols (A) to H) indicating this order of aspects correspond to the same symbols (A) to H) in FIG.

That is, when a normally inserted weft thread is in poor contact with the weft detector 48 and a no-yarn signal is sent from the detector, the control device issues the abnormal stop instruction and removes the pseudo-mistake yarn. M' is stopped at a phase of 3000 while continuing to be connected to the fabric (Fig. 3 (A)). In this case, the yarn end of the pseudo-mistake yarn is captured by the capture yarn 51.

After that, the phase position is reversed to 180'' and the pseudo-mistake thread M'
is exposed on the fabric front [Fig. 3 (B)), and after generating a suction airflow in the suction head 61, the weft stored on the drum 31 is inserted in a U-shape, and the folded part A from the fabric fabric is exposed. Pull it off by pulling it off [Figure 3 (C)]. Therefore, the insertion system extends between the weft insertion nozzle 20 and the suction head 61. If the pseudo-mistake yarn ``M'' is not peeled off from the captured yarn 51 during this process,
This is drawn into the rad 61 by suction while being tethered to the catching thread [FIG. 3(D)]. After that, the inserted weft is cut off [Fig. 3 (E)), the inserted weft is exposed to the fabric front and removed by suction [Fig. 3 (F)], and the position is adjusted to the restart position of 300° [Fig. 3 ( G)], restart preparation and restart [FIG. 3(H)] proceed with the pseudo-mistake yarn M' being tethered. After the restart, as the captured thread 51 is pulled forward as described above, the above-mentioned mooring section also moves forward, and the thread path is moved forward as shown by the two-dot chain line in FIG. 3(H). Wa faces the cutting edge of the razor-shaped thread cutter 7o and is cut there.

The embodiment is as described above.

In this embodiment, since a razor-shaped thread cutter 7o is used, the construction can be made extremely simple. In this case, if the error thread traction removal device 60 is left in operation for a predetermined time after restarting, the tethered pseudo error thread will come into contact with the cutting edge while being applied with tension.
There is no need to worry about cutting mistakes. [In addition, a heat cutter can also be used as the above-mentioned contact cutting type thread cutter, and a chain type cutter can be used to carry out the pulling and peeling stage [Figure 2 (D) or Figure 3 (D)] It can also be configured to operate at a later time.

〔effect〕

As explained above, according to the present invention, even if the misplaced thread is not pulled off from the captured thread during pulling and removal processing of the misplaced thread, it is cut, so that the captured thread is removed after restarting. This avoids the situation where the yarn is broken due to abnormal tension.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating the configuration of a loom to which an embodiment of the present invention is applied, and FIGS. 2 and 3 are diagrams illustrating the operation mode of the loom, respectively. 17...Weft entry pump 20...Weft entry nozzle 30.
... Weft length measuring storage device 48 ... Weft detector 50 ... Yarn end catching device 51
... Captured yarn 60 ... Missed thread traction removal device 70 ... Yarn cutter Y ... Warp W ... Weft Wa ... Thread path M ... Missed thread M゛ ... Pseudo-missed thread

Claims (1)

[Claims] A plurality of catching yarns (5
It has a yarn end catching device (50) that catches the yarn end of the weft yarn (W) inserted using 1), and furthermore, when a weft insertion error occurs during weaving, it catches the yarn end of the weft yarn (M, M'). In a fluid jet loom equipped with a mis-thread pulling and removing device (60) for pulling and removing mis-thread yarns from the opposite weft entry side of the yarn-end catching device, the yarn path (Wa ) A fluid injection type loom equipped with a mis-thread pulling and removing device in which a thread cutter (70) is arranged.