JPH0655978B2 - Weft processing method for shuttleless loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of 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 art) With regard to shuttleless looms such as jet loom, we can expect much higher productivity than the shuttleless looms, and the tendency to adopt the shuttleless looms has been remarkable in recent years, but weft insertion errors have occurred. It is a well-known fact that the ratio is higher than that of the 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. Therefore, it is necessary to reverse the machine base to release the gripped state of the miss yarn by the warp yarn and remove the miss yarn. This miss thread removal operation is performed manually or in JP-A-58-220856 and JP-A-59-2.
1752, Japanese Patent Laid-Open No. 59-21757, and the like. In Japanese Patent Laid-Open No. 58-220856, the weft processing device moves to a predetermined miss yarn processing position along a rail laid in the weft width direction, and the miss yarn separating member (fingers) in the device is substantially elliptical orbit. Then, while adhering to the cloth fell from the outside of the warp opening, the cloth enters the inside of the warp opening and separates a part of the miss yarn struck in the cloth into the warp opening. A part of the separated miss yarns is scraped off the warp and delivered to a drawing member inserted into the warp opening, and the warp is scraped from inside the warp opening and pulled out of the warp opening. A part of the miss yarns drawn out of the warp yarn opening is delivered to another drawing mechanism, and the same miss yarns in the warp yarn opening are all drawn out of the warp yarn opening and removed. Japanese Patent Laid-Open Nos. 59-21752 and 5
According to Japanese Laid-Open Patent Publication No. 9-21757, a plurality of miss yarn separating members of a weft yarn treating device arranged at predetermined positions in the weft width direction rub against the weaving fabric while sliding it on the weaving fabric side, and from the weaving fabric into the warp shed. Multiple parts of the miss yarn are separated. That is, a plurality of parts of the miss yarn in the warp opening are relaxed in the gripped state by the warp, and the missed yarn in which the gripped state by the warp is relaxed is scraped off the warp from the warp opening by an appropriate pulling means, or in the weft width direction. It is pulled out toward the outside of the warp opening.

(Problems to be solved by the invention) In order to separate the miss yarn from the cloth fell, the maximum open state is formed during normal operation, and the miss yarn is held and relaxed by the warp, but the miss yarn is different from the normal weft yarn. Since it is struck in the woven fabric almost in the same manner, the state of gripping the miss yarn by the warp is not sufficiently relaxed even in the maximum open state. Therefore, it is not easy to manually remove the miss yarn, and the removing operation becomes very complicated, and the stop time of the loom becomes long, which hinders the productivity improvement required for the high-speed loom.

On the other hand, JP-A-58-220856 using a weft processing device.
In the miss yarn processing method of the publication, the miss yarn is pulled out to the outside of the warp opening without being loosened except for the portion of the miss yarn that is first pulled out to the outside of the warp opening. Even if the maximum open state is formed to alleviate the miss yarn grasping state by the warp yarn, the pullout resistance is extremely large. Therefore, conditions such as weaving width and thread quality are limited in order to avoid miss thread cutting due to pull-out resistance,
It is difficult to actually carry out a stable miss yarn processing operation.

JP-A-59-21752 and JP-A-59-21757
In the miss yarn processing method disclosed in Japanese Patent Laid-Open Publication No. 58-220856, the pull-out resistance from the warp shed is relaxed as compared with the method disclosed in Japanese Patent Laid-Open No. 58-220856 because the miss yarn is separated from the cloth fell and loosened at a plurality of portions. To be done. However, even if the maximum open state is formed during normal operation, the grasped state by the warp thread is not sufficiently released, so that the grasping action by the warp thread is still received at the portions other than the plurality of loosened portions, and the pullout at the time of misdrawing the thread Great resistance.

In addition, a miss yarn separating action must be performed in which the tip of the miss yarn separating member of each of the weft processing devices is inserted between the normal weft and the miss yarn woven in the woven cloth, but at the time of normal operation. Even if the maximum open state is formed, the state in which the miss yarn is grasped by the warp yarn is not sufficiently released. Therefore, the miss yarn separating member should be inserted between the weft yarn and the miss yarn while pushing the miss yarn from the cloth fell inside the opening. There is a risk that you will fail. In other words, as long as the influence of the gripping action by the warp is great, in order to achieve the extremely delicate operation of separating one miss yarn from the cloth fell of the woven fabric, it is possible to avoid complication of the mechanism of the device. However, there is a problem in that rapid processing and reliability cannot be obtained.

Configuration of the Invention (Means for Solving the Problems) Therefore, in the present invention, an opening angle exceeding the maximum opening angle formed during normal operation is formed at least near the cloth fell by the warp that opens and closes every weft insertion. The weaving state of the weft yarns woven into the woven fabric immediately before the stand is stopped is released by forming the opening angle so that the weft yarns are separated from the cloth fell.

(Operation) That is, by forming an opening angle in the vicinity of the cloth fell that exceeds the maximum opening angle during normal operation, the weft yarn woven into the woven fabric immediately before the stop of the machine is largely released from the gripping action by the warp yarn. Therefore, the pull-out resistance when pulling out the weft from the inside of the warp opening to the outside of the warp opening through the space between the warp threads or pulling the weft out of the warp opening toward the weft width direction is greatly reduced, and the weft from the inside of the warp opening is reduced. Removal is done smoothly.

Further, the reduction of the weft gripping force by the warp assists the hooking action of the weft separating member of the weft processor, and the weft that is largely released from the gripping action by the warp loosens due to its own tension and is usually adjacent to the same weft. A gap is likely to be formed between the weft and the weft. Therefore, the tip of the weft separating member of the weft processing device easily enters 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, one example embodied in the case of the plain weave of the present invention will be described with reference to Figs.

In FIG. 1, reference numeral 1 denotes one of a plurality of heald frames, which are an inner frame 2 with a heald and an inner frame 2 of the same.
And an outer frame 3 for supporting the upper and lower parts of the same so as to be adjustable in vertical position. The outer frame 3 is suspended by a suspension rope 6 which is tensioned by a tension spring 4 via a jack lever 5, and a cam plate 7 which is rotated in synchronization with a drive shaft (not shown) of the loom. The cam action is converted into vertical movement for each weft insertion via the cam lever 8 and the pull-down rope 9.

Reference numeral 10 is a guide roller for guiding the pull-down rope.

As shown in FIGS. 2 and 3, both upper and lower crossbars 3a of the outer frame 3
A slide cover 11 having a U-shaped cross section is erected and fixed between the both ends of each of the side stays 3b. Bellows 12 are fixed to each inner surface of the cover 11,
A pressure contact plate 13 is fixed to the tip surface of each bellows 12. Air supply to each bellows 12 is performed by opening / closing control of an electromagnetic valve (not shown), and this valve opening / closing control is performed according to a preset miss yarn processing program. Then, the respective pressure contact plates 13 are brought into pressure contact with the respective outer surfaces of the side frames 2a of the inner frame 2 by the expansion of the respective bellows 12, and the inner frame 2
Is pressed and held at a predetermined height position.

As shown in FIGS. 4 and 5, in this embodiment, a plain weave using a pair of heald frames 1 and 1A is targeted, and the other heald frame 1A also has the heald frame 1 described above.
Similarly to the inner frame 2A, the outer frame 3A, the slide cover 11A,
It has a similar structure including a bellows 12A and a pressure contact plate 13A.

In the present embodiment, when a weft insertion error occurs, the miss yarn processing is performed based on the miss yarn processing program. Therefore, the operation of the miss yarn processing when a weft insertion error occurs will be described below.

Both the heald frames 1, 2 during normal operation shown in FIGS.
The inner frame 2 and 2A of 1A are pinched and fixed to the upper and lower central positions of the outer frames 3 and 3A. In this state, both heald frames 1,
1A is alternately put up and down for each weft insertion, and the maximum opening shown in FIG. 4 is formed by the warp group T1 inserted and held on one heald frame 1 side and the warp group T2 inserted and held on the other heald frame 1A side. The state and the closed state shown in FIG. 5 are alternately formed during one weft inserting cycle. FIG. 9 shows the vicinity of the cloth fell W1 of the woven cloth W corresponding to FIG. In this state of maximum opening formation during normal operation, the height interval between both inner frames 2 and 2A is equal to the vertical movement distance l of both heald frames 1 and 1A. In the maximum open state shown in FIG. 4, the deformed reed 14 is at the most retracted position from the cloth fell W1 of the woven fabric W, and in the closed state shown in FIG. 5, the deformed reed 14 is near the cloth fell W1. As shown in FIGS. 4 and 5, a maximum opening is formed by both warp yarn groups T1 and T2, and when a weft yarn injected into the opening from a main weft-inserting main nozzle (not shown) causes a weft inserting error, No weft insertion error detection device issues a weft insertion error detection signal. The operation of the loom is stopped based on this signal, but in consideration of the damage prevention of each part of the machine stand, the machine stand rotates by inertia about once and then stops, and both the heald frames 1, 1A and the deformed reed 14 are stopped. It stops at the position shown in FIG. During this machine inertia operation, weft insertion following the weft insertion error (hereinafter referred to as miss yarn Y) is about to be performed, but a weft insertion blocking device (not shown) prevents the following weft insertion. . Further, a cutter (not shown) for cutting and separating the weft-inserted weft yarn from the weft-insertion main nozzle side for each weft insertion is temporarily placed in an inoperative state, and the miss yarn Y and the succeeding weft yarn are cut and separated. Is avoided. When the machine stand is stopped, the miss yarn Y is driven into the cloth fell W1 of the woven fabric W as shown in FIG. 10 to form a closed state.
1, T2 is gripped and woven into the woven fabric W.

Bellows 1 of both heald frames 1, 1A after the machine stop
2, 12A contract, and the pressure contact plates 13, 13A separate from the inner frame 2. As a result, the holding state of the side frame 2 by the pressure contact plates 13 and 13A is released, and the inner frames 2 and 2A can move up and down with respect to the outer frames 3 and 3A. In this state, the inner frames 2, 2A are suspended and supported by the warp groups T1, T2 at the positions shown in FIG. 6, and the inner frames 2, 2A are prevented from falling. After the holding state of the inner frames 2 and 2A by the pressure contact plates 13 and 13A is released, the machine frame rotates about halfway forward and both heald frames 1 and 1A and the deformed reed 14 are arranged at the positions shown in FIG. To be done. That is, the outer frames 3 and 3A are arranged at the maximum opening forming position during normal operation, but the inner frames 2 and 2A do not follow the outer frames 3 and 3A, and the warp groups T1 and T2 maintain the closed state. To do. In this state, one inner frame 2 is arranged corresponding to the upper part inside the outer frame 3, and the other inner frame 2A is arranged corresponding to the lower part of the outer frame 3A.

When the outer frames 3 and 3A are arranged at the positions shown in FIG. 7, the bellows 12 and 12A are expanded, and the inner frames 2 and 2A are pressed against each other.
Pressed and held by 3, 13A. Subsequently, the machine base is normally or reversely rotated once, and both heald frames 1 and 1A are placed at the maximum opening forming position during normal operation shown in FIG. Accordingly, the inner frames 2 and 2A are moved in the opposite directions from the position shown in FIG. 7 by the moving amount 1 of the heald frames 1 and 1A. Therefore, both inner frames 2 and 2A have a height interval l of 2 when the maximum opening is formed during normal operation.
The height angle is doubled, and the opening angle α due to both warp yarn groups T1 and T2 at this time is larger than the maximum opening angle β during normal operation, as shown in FIGS. In the state where the weaving of the miss yarn Y woven into the woven fabric W is released by the formation of the opening, the weft insertion side of which weft insertion is prevented by the weft insertion preventing device is pulled and removed by the weft removing device (not shown). Accordingly, the miss yarn Y connected to the same weft yarn is pulled out from the warp opening along the weft inserting direction toward the main nozzle for weft inserting and removed.

Since the miss yarn Y is driven into the cloth fell W1 as well as the weft yarn which is normally inserted, even if the maximum opening angle β during normal operation is formed, the miss yarn Y is gripped by the warp groups T1 and T2. The force is fairly large and a great resistance is involved in the separation of the miss yarn Y from the cloth fell W1. However, by forming an opening angle α that exceeds the maximum opening angle β in the vicinity of the cloth fell W1 during normal operation, the gripping force of the miss yarn Y by both warp yarn groups T1 and T2 is greatly reduced, and the miss yarn Y from the cloth fell W1 is reduced. Separation resistance when separating is greatly suppressed. Therefore, the pull-out resistance of the miss yarn Y drawn out from the inside of the warp yarn to the outside of the warp yarn along the weft insertion direction is small, and the miss yarn Y is smoothly removed without cutting the miss yarn Y due to the pull-out resistance. Be seen.

When the removal of the miss yarn Y by the weft removing device is completed,
The machine base is normally or reversely rotated once, and both heald frames 1 and 1A are switched up and down. As a result, as shown in FIG. 7, both inner frames 2 and 2A are aligned at the closing position. In this state, the bellows 12, 12A shift to a contracted state, and the inner frames 2, 2A are released from being held by the pressure contact plates 13, 13A. In this state, the machine frame rotates forward or backward halfway, and the height positions of both outer frames 3 and 3A are aligned as in both inner frames 2 and 2A, as shown in FIG. And bellows 12, 12A
Shifts to the inflated state, and the inner frames 2, 2A are pressed into the pressure contact plates 13, 1
3A is pressed and held, and is fixed at a predetermined height position during normal operation.

After that, the machine base is rotated forward or backward by a predetermined amount to the rotation position most suitable for restarting, and the operation of the loom is restarted.

In this embodiment, the miss yarn Y in the warp shed was pulled out from the warp shed along the weft inserting direction to the outside of the warp shed by the weft removing device without being separated from the cloth fell W1 to the warp shed side. For example, JP-A-58-220856, JP-A-59-21752 or JP-A-59
A method of separating the miss yarn Y from the cloth fell W1 to the warp shed side by a weft processing device as disclosed in Japanese Patent Publication No. 21757 may be adopted. In such a weft processing device, the weft separating member slides on the woven fabric and rubs against the cloth, and the tip of the separating member enters between the miss yarn and the weft inserted one cycle before. By forming the opening angle α that exceeds the maximum opening angle β during normal operation, the separation resistance of the miss yarn Y from the cloth fell W1 is significantly reduced, and the hooking action of the weft separating member works effectively. That is, when the tip of the weft separating member slides on the woven cloth W and reaches the position of the miss yarn Y, the tip pushes the miss yarn Y in the direction away from the cloth fell W1, and the miss yarn Y and the weft yarn are separated from each other. Although it enters the gap formed between the warps, the miss yarn Y is easily separated from the cloth fell W1 because the gripping force of both warp yarn groups T1 and T2 is greatly suppressed. Therefore, the tip of the weft separating member easily enters between the miss yarn Y and the weft, and the miss yarn separation from the cloth fell W1 to the warp opening side is successful with a high rate. As long as the influence of the gripping action by the warp is great, in order to achieve the extremely delicate operation of separating one miss yarn from the cloth fell of the woven fabric, it is inevitable that the weft processing device has a complicated mechanism. Moreover, there is a problem that quick processing and reliability cannot be obtained, but such a problem is solved by significantly suppressing the influence of the gripping action of the warp.

In addition, the reduction of the gripping force by the warp yarn groups T1 and T2 causes the miss yarn Y to contract due to its own tension, and the gap formation between the cloth fell W1 and the miss yarn Y which works effectively for the separating action of the weft separating member is caused. It is also done by contraction.

The formation of the opening angle α exceeding the maximum opening angle during normal operation means imparting an abnormal tension exceeding the normal tension to the warp groups T1 and T2, which is not preferable in 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 heald frames 1, 1A at the time of forming the opening angle α are synchronized with each other, and the feeding amount of the warp yarns or the winding of the cloth is taken up. It is desirable to maintain the tension during normal operation by controlling at least one of the amounts.

Also, parts such as the beating system and the measuring system that are mechanically connected to the opening system for timing operation and the opening system are operatively connected by a clutch mechanism so that the opening system can be released, and the same during the miss yarn processing period. By releasing the coupling of the clutch mechanism, the timing adjustment at the time of restart becomes easy.

In the above-described embodiment, the miss yarn Y is pulled out of the warp shed from the inside of the warp shed to the outside of the warp shed by the weft removing device. However, of course, even if the miss yarn is pulled out from the warp shed to the outside of the warp shed, manually. Good.

In the jet loom using the modified reed 14 as in the above-mentioned embodiment, the auxiliary nozzle for weft insertion separates the warp and moves it into and out of the warp opening, which may cause warp on the woven fabric. The opening / closing opening forming position may be adjusted in order to prevent the occurrence, but the configuration of the heald frames 1 and 1A adopted in the above-described embodiment can be applied to the adjustment of the opening / closing opening forming position. An example of adjusting the position will be described with reference to FIGS.

If both the heald frames 1, 1A are in the open / closed port forming state as shown in FIGS. 4 and 5, the two heald frames 1, 1A are stopped at the closed port forming position shown in FIG. After the machine base is stopped, the bellows 12, 12A are contracted to release the holding state of the inner frames 2, 2A by the pressure contact plates 13, 13A. After releasing the fixed state of the inner frames 2 and 2A with respect to the outer frames 3 and 3A, the machine frame is normally rotated by a predetermined amount to move the outer frames 3 and 3A up and down by a predetermined distance 11 as shown in FIG. In this state, the bellows 12A on one heald frame 1A side
Only the inflated state is moved to the inner frame 2A by the pressure contact plate 13A.
Hold the pressure contact. Subsequently, the machine base is reversed by the predetermined amount, and the both heald frames 1 and 1A are vertically replaced as shown in FIG. Due to this replacement, the inner frame 2A becomes the outer frame 3
It moves down with A, but the inner frame 2 does not move up
Stay in the same position as in Figure 2. After that, the bellows 12 on the side of the heald frame 1 is moved to an expanded state, and the inner frame 2 is clamped by the pressure contact plate 13 to complete the change adjustment of the opening / closing position. In this adjustment example, as shown in FIGS. 14 and 15, the opening / closing opening forming position by both warp yarn groups T1 and T2 is located below the normal opening / closing opening forming position shown in FIGS. The formation in the upper side of the normal opening / closing opening formation position can be achieved by following substantially the same procedure.

The present invention is of course not limited to the above-described embodiment, but as a method of adjusting the height position of the heald frame to form an opening angle exceeding the maximum opening angle during normal operation, the embodiment shown in FIG. Is possible.

In this embodiment, the heald frame 15 is the same as the previous embodiment.
Is composed of an inner frame 16 stretched by a heald and an outer frame 17 that supports the frame 16 so as to be movable up and down. The upper and lower positions of the inner frame 16 with respect to the outer frame 17 are the side stays 1 of the outer frame 17.
A plurality of electromagnetic solenoids 18, 19 buried in 7a,
20, 21 drive pins 18a, 19a, 20a, 21a
It is regulated by the protrusion of. In the illustrated example, a pair of upper and lower electromagnetic solenoids 18 and 21 regulates and holds the inner frame 16 at the maximum opening angle forming position during normal operation, and a pair of intermediate electromagnetic solenoids 19 and 20 exceeds the maximum opening angle during normal operation. It is used in forming the opening angle. That is, when forming an opening angle that exceeds the maximum opening angle during normal operation, the inner frame 16
Is the upper crossbar 17b of the outer frame 17 and the electromagnetic solenoid 1
9 between the drive pins 19a or the lower crossbar 1
7c and the drive pin 20a of the electromagnetic solenoid 20 are regulated and held. For example, from the state shown, the electromagnetic solenoid 1
In order to hold the inner frame 16 regulated by the drive pin 19a of No. 9, the drive pin 18a of the electromagnetic solenoid 18 is immersed in the normal closed state and the machine frame is normally or reversely rotated to move the outer frame 17 downward. The drive pin 19a of the electromagnetic solenoid 19 may be projected.

Although a plurality of electromagnetic solenoids are used in FIG. 16,
A configuration is also possible in which one electromagnetic solenoid is provided and a plurality of locking holes into which drive pins of the solenoid can be fitted are provided at predetermined positions on the side frame of the inner frame 16.

In the heald frame type having a double structure consisting of an inner frame and an outer frame, an electromagnet is mounted on the guide surface of a side stay 17a that slides and guides the inner frame 16 instead of the electromagnetic solenoid in the embodiment shown in FIG. A configuration in which the side frame of the frame 16 is formed of a magnetic material is also possible.

As a method of adjusting the height position of the heald frame to form an opening angle exceeding the maximum opening angle in normal operation,
The embodiment shown in FIG. 18 is also possible.

In this embodiment, the depolarizing opening device is premised, and the heald frame 22 is the same as the conventional one. A pair of pull-down ropes 23 extending from the cam lever 8 to the heald frame 22 that are rocked by the rotation of the cam plate 7 that is rotated in synchronization with the machine base are guided by the pair of double guide rollers 25 and 26, and then double-rolled. It branches from the guide roller 26 and is separately connected to the heald frame 22 via the guide rollers 27 and 28. An opening amount adjusting device 29 is installed between the double guide rollers 25 and 26, and the path of the pulling down rope 23 can be vertically adjusted by the device 29.

As shown in FIG. 18, the opening amount adjusting device 29 is erected and supported between a pair of front and rear support rails 30 and 31, and the same number of air cylinders 32 and 33 as the heald frame 22 are moved forward and backward by a cover 38 and a support bracket 39. It is supported side by side. Piston rod 3 of each air cylinder 32, 33
2a and 33a project downward, and the double rollers 34 and 35 are attached to the tips of the rods 32a and 33a.
Is rotatably supported. Pull-down rope 23,2
4 is guided above the double rollers 34 and 35,
During normal operation, the pull-down ropes 23, 24 are aligned at the same height as shown in FIG. 18, and are bent and guided upward between the double guide rollers 25, 26 as shown in FIG. .

In order to form an opening angle that exceeds the maximum opening angle during normal operation, first, the maximum opening angle during normal operation is formed in the direction of releasing the miss thread grip. The pull-down rope 23 connected to the heald frame in the upper moving position is the air cylinder 32.
The piston rod 32a is further projected and further fed out, and the pull-down rope 24 corresponding to the heald frame in the downward movement position moves the piston rod 33a of the air cylinder 33 in the closing direction and further pulls it down. As a result, the heald frame in the upper moving position further moves up, and the heald frame in the lower moving position further moves down, so that an opening angle exceeding the maximum opening angle during normal operation is formed.

In this embodiment, it is necessary to detect the vertical position of each heald frame when forming the opening angle exceeding the maximum opening angle during normal operation. For example, in the opening type using a cam, the rotational position of the cam is detected. However, this detection signal causes the air cylinder 3
It suffices to select the moving direction of the piston rods 33a, 34a of 3, 34.

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

In FIG. 19, a flat rod 36 is inserted horizontally in the opening, and the rod 36 is rotated by about 90 ° to form an opening angle α near the cloth fell W1 that exceeds the maximum opening angle β during normal operation. ing.

In FIG. 20, a suction pipe 37 having a triangular prism shape having a suction slit 37a in the longitudinal direction is inserted into the warp opening and moved to the cloth fell W1 side, forming an opening angle α in the vicinity of the cloth fell W1 and the cloth fell W1. It is designed such that the miss yarn is separated by suction.

Further, the present invention can be applied not only to the processing of the miss yarn but also to the case where the weft yarn inserted into the weft yarn during the inertial operation immediately before the machine base is stopped by the artificial machine stop is separated from the woven cloth.

EFFECTS OF THE INVENTION As described in detail above, according to the weft processing method of the present invention in which an opening angle exceeding the maximum opening angle during normal operation is formed at least in the vicinity of the cloth fell and the weft processing is performed, the weft gripping force by the warp is increased. It has an excellent effect that the weft separation resistance from the cloth fell can be reduced and the weft removal processing can be performed smoothly in any case where the weft is removed from the warp shed manually or by a processing device.

[Brief description of drawings]

1 to 11 show an embodiment embodying the present invention. FIG. 1 is a front view of an opening device, FIG. 2 is a front view of a partially broken main part of a heald frame, and FIG. 3 is FIG. A-A line sectional view of
4 to 8 are vertical cross-sectional views for explaining the action of forming an opening angle exceeding the maximum opening angle during normal operation, and FIGS. 9 to 11 are longitudinal cross-sectional views of the essential parts showing the action of forming the opening angle, and 12 to 12. FIG. 15 is a vertical cross-sectional view showing a method for adjusting the opening / closing opening forming position during normal operation, FIG. 16 is a front view of a partially broken main part showing another example of a double-structured heald frame, and FIG. 17 is another view of the present invention. Front view showing an example,
18 is an enlarged sectional view taken along line BB of FIG. 17, FIGS.
Each of FIG. 0 is a longitudinal sectional view of a main part showing another example of the present invention. Warp groups T1, T2, maximum opening angle β during normal operation,
Opening angle α, miss yarn Y.

Claims (1)

[Claims] 1. An opening angle exceeding a maximum opening angle formed during normal operation is formed at least near the cloth fell by a warp that opens and closes every weft insertion, and by this opening angle formation, it is woven into the woven fabric immediately before the machine stand is stopped. Release the weaving condition of the weft
A weft processing method in a shuttleless loom for separating the weft from the cloth fell.