JPS6297944A - Treatment of weft yarn 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 Object of the Invention (Field of Industrial Application) The present invention relates to a weft processing method in a shuttleless loom such as a jet loom, a rapier loom or a gripper loom.

(Prior technology) Shuttleless fa&9 such as jet looms can be expected to have much higher productivity than diameter looms, and there has been a noticeable trend in recent years to adopt shuttleless looms, but weft insertion errors still occur. It is a well-known fact that the ratio is higher than that of diameter looms. 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 '#i machines such as shuttleless looms, the machine is stopped in order to prevent damage to various parts. Since the machine is stopped after inertial operation of one rotation or more,
Immediately before the machine stops, the weft yarns that have been inserted incorrectly (hereinafter referred to as erroneous yarns) are beaten and woven into the woven fabric. Therefore, the machine must be reversed to release the warp from holding the misplaced thread, and the misplaced thread must be removed.

This mistake thread removal work can be done manually or by
This is carried out using a weft processing device such as that disclosed in Japanese Patent Application Laid-open No. 856, Japanese Patent Application Laid-open No. 59-21752, and Japanese Patent Application Laid-Open No. 59-21757. In Japanese Patent Application Laid-Open No. 58-220856, a weft yarn processing device moves to a predetermined mis-yarn processing position along a rail installed in the weaving width direction, and a mis-yarn separating member (finger) in the device moves along a substantially elliptical trajectory. The yarn is drawn and enters the warp opening from outside the warp opening while scraping the woven fabric, separating a part of the misplaced threads that have been driven into the fabric opening into the warp opening. A part of the separated mis-threads is passed through the warp to a pull-out member inserted into the warp opening, and is pulled out from inside the warp opening through the warp. A portion of the misplaced threads that have been pulled out of the warp shedding are delivered to another pulling mechanism, which pulls out all the misplaced threads that remain within the warp shedding and removes them. Japanese Patent Application Publication No. 5
No. 9-21752 and Japanese Unexamined Patent Publication No. 59-21757 disclose that a plurality of miss yarn separation members of a weft processing device, which are arranged at predetermined positions in the weave width direction, rub the front of the fabric while sliding on the fabric toward the front of the fabric. , multiple portions of the miss yarn are separated from the weaving front into the warp opening. In other words, multiple parts of the misplaced threads in the warp shed are relieved from being held by the warp, and the missed threads that have been released from their grasp by the warp are pulled through the warp from inside the warp shed by an appropriate pulling means, or are moved in the weaving width direction. The warp threads are pulled out of the warp opening.

(Problem to be Solved by the Invention) In order to separate the misplaced yarn from the fabric front, the maximum opening state during normal operation is created, and the grasp of the misplaced yarn by the warp yarns is relaxed, but when the misplaced yarn is separated from the normal weft. Since they are driven into the fabric in almost the same way, even in the maximum open state, the grip of the miss threads by the warp threads is not sufficiently alleviated. Therefore, it is not easy to manually remove the erroneous threads, and the removal work becomes very complicated, which increases the loom's stoppage time and impedes the productivity improvement required for high-speed looms.

On the other hand, Japanese Patent Application Laid-Open No. 58-220856 using a weft processing device
In the method for handling misplaced threads in the publication, the misplaced threads are passed between the warp threads and pulled out to the outside of the warp shedding without loosening them, except for the part where the misplaced threads are first pulled out of the warp shedding. Even if the maximum opening state is formed to alleviate the state of incorrect thread gripping by the warp threads, the pull-out resistance is extremely large. Therefore, conditions such as weaving width and yarn quality are limited in order to avoid erroneous yarn cutting due to pull-out resistance.
In practice, it is difficult to carry out stable mis-thread processing operations.

JP-A-59-21752 and JP-A-59-21757
In the method for handling misplaced threads in the publication, the misfired threads are separated from the fabric front at multiple locations and loosened, so the resistance to pulling them out from inside the warp opening is less than that of the method disclosed in JP-A-58-220856. be done.

However, even when the maximum opening state is reached during normal operation, the grasping state by the warp threads is not sufficiently released, so areas other than the plurality of loosened parts are still subject to the grasping action by the warp threads, and when the thread is pulled out by mistake. There is a lot of resistance.

In addition, a mis-thread separating action must be performed in which the tip of the mis-separated member of each of the weft processing devices enters between the normal weft woven into the woven fabric and the mis-thread, but this is not the case during normal operation. Even if the maximum shedding state is formed, the state in which the misplaced yarns are held by the warp threads is not sufficiently released, so the misplaced yarn separation member enters between the weft and the misplaced threads while pushing the misplaced yarns from the fabric front toward the inside of the shedding. There is a high risk of failure. In other words, as long as the gripping action of warp threads has a large influence, it is necessary to avoid complicating the mechanism of the weft processing device in order to accomplish the extremely delicate operation of separating a single misplaced thread from the front of the woven fabric. However, there is a problem that rapid processing and reliability cannot be obtained.

Structure of the Invention (Means for Solving Problems) Therefore, in the present invention, a shedding angle that exceeds the maximum shedding angle formed during normal operation by the warp threads that are opened and closed each time weft is inserted is formed at least near the front of the weave. The woven state of the weft threads woven into the woven fabric immediately before the table stops is released by forming the opening angle, and the weft threads are separated from the woven fabric.

(Function) That is, by forming an opening angle in the vicinity of the weaving front that exceeds the maximum opening angle during normal operation, the weft threads woven into the fabric immediately before the machine stops are largely released from the gripping action of the warp threads. Therefore, the pull-out resistance when pulling the weft from inside the warp opening to outside the warp opening through between the warps, or when pulling the weft yarn out of the warp opening in the weaving width direction, is greatly reduced, and the weft from inside the warp opening is Removal is smooth.

In addition, the reduction in the gripping force of the weft by the warp is aided by the catching of the weft separation member of the weft processing device, and the weft, which has been largely released from the grip by the warp, loosens due to its own tension and is separated from the adjacent weft. A gap is likely to occur between the weft yarn and the normal weft yarn. Therefore, the tip of the weft separation member of the weft processing device can easily get between the weft to be separated and the normal weft, and the weft separation using the weft processing device is successful at a high rate.

(Example) Hereinafter, an example in which the present invention is embodied in the case of plain weave will be described based on FIGS. 1 to 11.

In FIG. 1, l indicates one of the plurality of belt frames, and the inner frame 2 on which the belt is stretched, and the inner frame 2 on which the belt is stretched.
It is comprised of an outer frame 3 that supports the vertically adjustable position. The outer frame 3 is suspended by a hanging rope 6 which is tension-biased by a tension spring 4 via a jack lever 5, and a cam plate 7 rotates in synchronization with the drive shaft (path shown) of the loom. The cam action is converted into a vertical movement at each weft insertion via a cam lever 8 and a pull-down rope 9.

Note that lO is a guide roller for guiding the pull-down lobe.

As shown in Figure 2.3, both upper and lower cross pars 3a of the outer frame 3
A slide cover 11 having a U-shaped cross section is installed and fixed between both ends of the slide cover 11 in contact with each site stay 3b. A bellows 12 is fixed on each inner surface of the cover 11,
A pressure plate 13 is fixed to the tip end surface of each bellows 12. Air is supplied to each bellows 12 by opening/closing control of an electromagnetic valve (not shown), and this valve opening/closing control is performed according to a preset error thread processing program. Then, each pressure plate 13 is pressed against each outer surface of the side frame 2a of the inner frame 2 by the expansion of each bellows 12, and the inner frame 2
is pressed and clamped at a predetermined height position.

As shown in FIGS. 4 and 5, in this embodiment, a pair of belt frames 1. The target is plain weave using IA, and the belt frame 1 is also used in the other belt frame IA.
Similarly, inner frame 2A, outer frame 3A, slide cover 11A,
It has a similar structure consisting of a bellows 12A and a pressure contact ffl 3A.

In this embodiment, when a weft insertion error occurs, the error thread processing is 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 next.

During normal operation as shown in Figure 4.5, both belt frames 1.
The inner frames 2, 2A of the LA are clamped and fixed at the vertical center positions of the outer frames 3, 3A. In this state, both belt frames 1.
The IA is alternately placed up and down at each weft insertion, and the warp thread group T1 is inserted and held on one belt frame 1 side, and the warp thread group T2 is inserted and held on the other belt frame 1 side, so that the maximum opening shown in FIG. 4 is achieved. The state and the closed state shown in FIG. 5 are alternately formed during one weft insertion cycle. Figure 9 is the 4th
The vicinity of the woven fabric W1 of the woven fabric W corresponding to the figure is shown. In this state of maximum opening formation during normal operation, the height interval between both inner frames 2 and 2A is set to 1. It is equal to the vertical movement distance l of IA. In the maximum open state shown in FIG. 4, the deformed flow 14 is at the most retreated position from the front surface W1 of the woven fabric W, and in the closed state shown in FIG. 5, the deformed flow 14 is located near the front surface W1. As shown in Fig. 4.5, a maximum opening is formed by both warp groups Tl and T2, and if the weft ejected from the main nozzle for weft insertion (not shown) into the opening causes a weft insertion error, the weft insertion error (not shown) occurs. A weft insertion error detection signal is emitted from the weft insertion error detection device. The operation of the loom is stopped based on this signal, but in order to prevent damage to each part of the loom, the loom rotates approximately once due to inertia and then stops.
The IA and the modified flow 14 are stopped at the position shown in FIG.

During this inertia operation of the machine, weft insertion is about to be performed following the weft yarn that has been inserted incorrectly (hereinafter referred to as erroneous yarn Y), but a weft insertion prevention device (not shown) prevents the subsequent weft yarn from being inserted. . In addition, the cutter (path shown) that cuts and separates the inserted weft yarn from the main nozzle side for weft insertion each time the weft is inserted is temporarily put in an inoperable state, and the cutter (path shown in the figure) that cuts and separates the inserted weft yarn from the main nozzle side for weft insertion is temporarily put in an inoperative state, and the cutter (path shown in the figure) cuts and separates the missed yarn Y from the following weft yarn. is avoided. When the machine is stopped, the erroneous yarn Y is placed in the front W1 of the woven fabric W as shown in Fig. 10.
The side thread groups TI and T2 are driven into a closed state.
It is gripped by and woven into the woven fabric W.

After stopping the machine, both belt frames l and IA bellows 12
．． 12A contracts, and the pressure contact plates 13, 13A are separated from the inner frame 2. As a result, the clamping state of the side frame 2 by the pressure contact plates 13° 13A is released, and the inner frame 2.2A is held against the outer frame 3.
, 3A can be moved up and down. In this state, inner frame 2
, 2A are warp group T1. The inner frames 2, 2A are suspended and supported by T2 at the position shown in FIG. 6, and the inner frames 2, 2A are prevented from falling.

After the clamping state of the inner frame 2.2A by the pressure contacts 113 and 13A is released, the machine base rotates approximately half a turn in the normal direction, and both belt frames 1. The LA and modified flow 14 are arranged at the positions shown in FIG. That is, both outer frames 3° 3A are arranged at the maximum opening formation position during normal operation, but inner frames 2 and 2A are arranged at the position where both outer frames 3
, 3A and warp group T1. T2 maintains the mouth closed state. In this state, one of the inner frames 2 is arranged to correspond to the upper part of the outer frame 3, and the other two inner frames are arranged to correspond to the lower part of the outer frame 3A.

When the outer frame 3.3A is placed in the position shown in FIG.
, 13A.

Subsequently, the machine is rotated forward or reverse once, and both belt frames 1. The IA is placed upside down and placed at the maximum opening formation position during normal operation as shown in FIG. Accordingly, the inner frames 2, 2A move from the position shown in FIG. 7 to the belt frame 1.
They are moved in opposite directions to each other by a movement of 1A, 1x. Therefore, the height interval of the inner frame 2.2 people in the maximum opening state during normal operation! The opening angle α due to the side thread groups Tl and T2 at this time is larger than the maximum opening angle β during normal operation, as shown in FIGS. 8 and 11. With this opening formation, the weaving of the mis-woven yarn Y that had been woven into the woven fabric W is released, and the weft side whose weft insertion was prevented by the weft insertion prevention device is pulled and removed by a weft removal device (not shown). Accordingly, the misplaced yarn Y connected to the same weft is pulled out from inside the warp opening along the weft insertion direction toward the main nozzle for weft insertion and removed.

Since the misplaced yarn Y is inserted into the fabric front W1 in the same way as the normally inserted weft yarn, even if the maximum shedding angle β is formed during normal operation, the warp group TI remains.

The gripping force of the missed yarn Y by T2 is quite large, and the gripping force of the woven thread Y
Separation of the miss thread Y from the thread is accompanied by great resistance. However, by forming an opening angle α exceeding the maximum opening angle β during normal operation in the vicinity of the woven fabric W1, the side thread group T1.
The gripping force of the missed yarn Y due to T2 is greatly reduced, and the woven fabric w
Separation resistance when separating the wrong yarn Y from the yarn i is significantly suppressed. Therefore, the pullout resistance of the misplaced yarn Y that is pulled out from inside the warp shedding along the weft insertion direction to the outside of the warp shedding is small, and the misplaced yarn Y can be smoothly removed without being cut due to the pulling resistance. be exposed.

When the removal of the miss yarn Y by the weft yarn removal device is completed,
The machine is rotated forward or reverse once, and both belt frames 1
．． IA is swapped up and down. As a result, as shown in FIG. 7, the inner circular frames 2, 2A are aligned at the closed opening forming position. In this state, the bellows 12.degree. 12A shifts to a contracted state, and the inner circular frames 2, 2A are released from being held by the pressure contact plates 13, 13A. In this state, the machine rotates half a turn forward or reverse, and the 6th
As shown in the figure, the height position of both outer frames 3, 3A is the inner frame 2,
Arranged in the same way as 2A. Then, the bellows 12° 12A transitions to the expanded state, and the inner frames 2, 2A move to the pressure contact plates 13, 13A.
It is fixed at a predetermined height position during normal operation.

Thereafter, the loom is rotated forward or reverse by a predetermined amount to the rotational position most suitable for restarting, and the operation of the loom is resumed.

In this embodiment, the misplaced yarn Y in the warp opening was pulled out from inside the warp opening to outside the warp opening along the weft insertion direction by the weft removal device and removed by the weft removing device without being separated from the fabric front Wl to the warp opening side. For example, JP-A-58-220856, JP-A-59-21752, or JP-A-59
A method of separating the misplaced yarn Y from the woven fabric W1 to the warp opening side using a weft treatment device as disclosed in Japanese Patent No. 21757 may be adopted. In such a weft processing device, the weft separation member slides on the woven fabric and scrapes the front of the fabric, and the tip of the separation member gets between the missed yarn and the weft inserted one cycle before. By forming an opening angle α that exceeds the maximum opening angle β during normal operation, the separation resistance of the missed yarn Y from the woven fabric W1 is significantly reduced, and the action of catching the weft yarn separation member works effectively. That is, when the tip of the weft separation member slides on the woven fabric W and reaches the position of the misplaced yarn Y, the tip pushes the misplaced yarn Y in the direction of separation from the fabric front W1, and the misplaced yarn Y and the weft yarn are separated from each other. However, since the gripping force by the bimodal yarn groups Tl and T2 is greatly suppressed, the misplaced yarn Y can be easily separated from the woven fabric Wl. Therefore, the tip of the weft separation member easily enters between the misplaced yarn Y and the weft, and separation of the misplaced yarns from the fabric front W1 to the warp opening side is successful at a high rate. As long as the gripping action of the warp yarns has a large influence, it is inevitable that the mechanism of the weft processing device becomes complicated in order to accomplish the extremely delicate operation of separating a single misplaced yarn from the front of the woven fabric. However, these problems can be solved by significantly suppressing the influence of the gripping action of the warp threads.

In addition, due to the decrease in the gripping force by the warp yarn groups Tl and T2, the misplaced yarn Y contracts due to its own tension, and the formation of a gap between the woven fabric Wl and the misplaced yarn Y, which effectively works for the separation action of the weft separation member, occurs as described above. It is also done by contraction.

Note that forming an opening angle α that exceeds the maximum opening angle during normal operation means that an abnormal tension exceeding the normal tension is applied to the warp groups Tl and T2, which is not preferable in terms of weaving. Therefore, in order to avoid this abnormal tension, at least one of the feeding device or the winding device and the vertical movement of the belt frame 1.1A when forming the opening angle α are synchronized, and the amount of warp feeding or the winding of the woven fabric is It is desirable to maintain the tension during normal operation by controlling at least one of the amounts.

In addition, parts such as the reed beating system and length measuring system, which are mechanically connected to the shedding system and operate at timing, are connected to the shedding system by a clutch mechanism so that they can be disconnected from each other. By disengaging the clutch mechanism, it becomes easier to adjust the timing when restarting.

In the above embodiment, the misplaced yarn Y was pulled out from inside the warp shedding along the weft insertion direction by the weft removing device, but of course the misplaced yarn Y could also be manually pulled out from inside the warp shedding to outside the warp shedding. good.

In addition, in the jet loom using the modified reed 14 as in the above embodiment, the weft insertion auxiliary nozzle separates the warp threads and moves in and out of the warp opening, which may cause warp streaks to occur on the woven fabric. In order to prevent the formation of streaks, the opening/closing opening formation position may be adjusted, but the configuration of the belt frames I and IA adopted in the above embodiments can be applied to adjusting the opening/closing opening forming position, and the opening/closing opening formation position can be adjusted. An example of adjusting the forming position will be explained based on FIGS. 4.5.12 to 15.

Both belt frames 1. Assuming that the IA is in the opening/closing state as shown in FIGS. 4 and 5, both belt frames 1. The IA stops at the closing position shown in FIG. After the machine is stopped, the bellows 12, 12A are contracted to release the clamping of the inner frames 2, 2A by the pressure plates 13, 13A.

After releasing the fixed state of the inner frames 2 and 2A with respect to the outer frames 3 and 3A,
Rotate the machine forward a predetermined amount and rotate the outer frame 3, 3 as shown in Figure 12.
Move A a predetermined distance 11 up and down. In this state, only the bellows 12A on one side of the belt frame l is moved to the inflated state, and the inner frame 2A is pressed and clamped by the pressure contact plate 13A. Subsequently, the machine base is reversed by the predetermined amount, and both belt frames 1. Swap LA up and down.

Due to this replacement, the inner frame 2A moves downward together with the outer frame 3A, but the inner frame 2 remains at the same position as in FIG. 12 without moving upward. Thereafter, the bellows 12 on the side of the belt frame I is brought into an inflated state and the inner frame 2 is pressed and clamped by the pressure contact plate 13, thereby completing the change and adjustment of the opening/closing opening forming position. In this example of adjustment, as shown in FIG. 14.15, the opening/closing opening forming position by both warp thread groups TI and T2 is located below the normal opening/closing opening forming position shown in FIG. 4.5. When forming the opening/closing opening above the normal opening/closing opening position, this can be achieved by following almost the same procedure.

The present invention is of course not limited to the above-mentioned embodiments, and the embodiment shown in FIG. 16 is a method for adjusting the height position of the belt frame to form an opening angle that exceeds the maximum opening angle during normal operation. is possible.

In this embodiment, the belt frame 15 is similar to the previous embodiment.
is composed of an inner frame 16 on which a belt is stretched, and an outer frame 17 that supports an open frame 17 in a vertically movable manner.
A plurality of electromagnetic solenoids 18.19.
20.21 drive pins 18a, 19a, 20a, 21a
In the illustrated example, a pair of upper and lower electromagnetic solenoids 18.21 regulate and hold the inner frame 16 at the maximum opening angle formation position during normal operation, and the middle pair of ! The magnetic solenoids 19 and 20 are used to create an opening angle that exceeds the maximum opening angle during normal operation.

That is, when forming an opening angle exceeding the maximum opening angle during normal operation, the inner frame 16 is located between the upper cross spar 17b of the outer frame 17 and the drive pin 19a of the electromagnetic solenoid 19,
Alternatively, it is regulated and held between the lower cross spar 17C and the drive pin 20a of the electromagnetic solenoid 20. For example, in order to regulate and hold the inner frame 16 with the drive pin 19a of the electromagnetic solenoid 19 from the illustrated state, the drive pin 18a of the electromagnetic solenoid 18 is retracted in the normal closed state, and the machine base is rotated forward or reverse to control the outer frame 16. 17 should be moved downward, and then the drive pin 19a of the electromagnetic solenoid 19 should be made to protrude.

In Figure 16, multiple electromagnetic solenoids are used,
It is also possible to use one electromagnetic solenoid and provide a plurality of locking holes at predetermined positions in the side frame of the inner frame 16 into which the drive pins of the solenoid can fit.

In the double structure belt frame type consisting of an inner frame and an outer frame, in the embodiment shown in FIG. A configuration in which the side frames of the frame 16 are made of a magnetic material is also possible.

The 17th method is to adjust the height position of the belt frame to form an opening angle that exceeds the maximum opening angle during normal operation.
The embodiment shown in FIG. 18 is also possible.

This embodiment is based on a negative shedding device, and the belt frame 22 is the same as the conventional one. A pair of pull-down lobes 23 that extend from a cam lever 8 that swings with the rotation of a cam plate 7 that is rotated in synchronization with the machine base to a helmet 22 guide a pair of double kite rollers 25 and 26. After that, it branches from the double kite roller 26 and passes through the guide rollers 27 and 28 separately to the belt frame 22.
An opening amount adjustment device 29 is installed between the two double guide rollers 25 and 26 connected to the
The path of the pull-down row 123 can be adjusted up and down.

As shown in FIG. 18, the opening N adjustment device 29 is supported between a pair of front and rear support rails 30, 31, and the same number of air cylinders 32, 33 as the belt frame 22 are connected to the front and back by a cover 38 and a support bracket 39. Supported side by side. Piston rod 3 of each air cylinder 32.33
2a and 33a project downward, and double rollers 34 and 35 are provided at the tips of each rod 32a and 33a.
is rotatably supported. Pull down robe 23.2
4 is guided on the upper side of double rollers 34 and 35,
During normal operation, the pull-down lobes 23 and 24 are aligned at the same height as shown in Fig. 18, and are bent and guided upward between the double guide rollers 25 and 26 as shown in Fig. 17. .

To form a shedding angle that exceeds the maximum shedding angle during normal operation, first form the maximum shedding angle during normal operation in the direction that releases the misthread grip (.Then, connect it to the belt frame in the upward movement position. The pull-down row 123 further protrudes and sends out the piston rod 32a of the air cylinder 32, and the pull-down row 123 corresponding to the belt frame in the lower movement position
24 moves the piston rod 33a of the air cylinder 33 in the retracting direction and further lowers it. As a result, the belt frame in the upward movement position further moves upward, and the belt frame in the downward movement position further moves downward, forming an opening angle that exceeds the maximum opening angle during normal operation.

In this embodiment, when forming an aperture angle that exceeds the maximum aperture angle during normal operation, it is necessary to detect the vertical position of each belt frame. For example, in the case of an aperture type that uses a cam, the rotational position of the cam must be detected. Then, air cylinder 3 is activated by this detection signal.
3.34, the moving direction of the piston rods 33a, 34a may be selected.

As a method of forming the opening angle α other than adjusting the vertical position of the belt frame, the embodiment shown in FIGS. 19 and 20 is possible.

In Fig. 19, a flat loft 36 is inserted into the opening in a horizontal state, and the rod 36 is rotated approximately 90'' to form an opening angle α exceeding the maximum opening angle β during normal operation near the cloth front W1. ing.

In FIG. 20, a suction pipe 37 in the shape of a triangular prism equipped with a suction sulin (suction sulin) 37a in the longitudinal direction is inserted into the warp opening and moved toward the weave Wl side, forming an opening angle α in the vicinity of the weave W1. This system is designed to suction and separate misplaced threads from Wl.

Further, the present invention can be applied not only to the treatment of erroneous yarns, but also to the case where the weft yarns inserted during the inertial operation immediately before the machine stop due to an artificial stoppage of the machine are separated from the woven fabric.

Effects of the Invention As detailed above, according to the weft processing method of the present invention, which performs weft processing by forming an opening angle that exceeds the maximum opening angle during normal operation at least in the vicinity of the woven fabric, the weft gripping force of the warp can be reduced. This has the excellent effect of suppressing the weft separation resistance from the woven fabric and enabling smooth weft removal processing whether the weft is removed manually or by a processing device from within the warp opening.

[Brief explanation of drawings]

1 to 11 show an embodiment embodying the present invention, in which FIG. 1 is a front view of the shedding device, FIG. 2 is a partially cutaway front view of the main part of the belt frame, and FIG. AA line sectional view of
4 to 8 are longitudinal sectional views illustrating the effect of forming an aperture angle that exceeds the maximum aperture angle during normal operation, 9 to 11 are longitudinal sectional views of main parts showing the effect of forming an aperture angle, and 12 to 11 Fig. 15 is a longitudinal cross-sectional view showing a method for adjusting the opening/closing opening position during normal operation, Fig. 16 is a partially cutaway front view of main parts showing another example of a belt frame with a double structure, and Fig. 17 is an alternative example of the present invention. Front view showing an example,
Figure 18 is an enlarged sectional view taken along line B-B in Figure 17, and Figure 19.2.
0 are longitudinal sectional views of main parts showing other examples of the present invention. Warp group T1. T2, maximum opening angle β during normal operation,
Opening angle α, miss thread Y.

Claims (1)

[Claims] 1 A shedding angle that exceeds the maximum shedding angle formed during normal operation by the warp threads that open and close each time weft insertion is formed at least near the weaving front, and by forming this shedding angle, the weft yarns woven into the woven fabric immediately before the machine stops. A weft processing method in a shuttleless loom, which releases the weft state and separates the weft from the woven fabric.