JPH06128844A - Separator for defective weft yarn in multicolor rapier loom - Google Patents

Abstract

PURPOSE:To separate only weft yarn connected to defective weft yarn from other weft yarns when defective picking occurs and ensure the operation to remove the defective weft yarn with a device for removing the weft yarn. CONSTITUTION:A fixed guide member 11 and 5 weft yarn separating member 12 are arranged on the picking side of a woven fabric (CL). The weft yarn separating member 12 takes a downward separating position and connects to defective weft yarn in defective picking to separate the weft yarn (Y4) moving through a selection finger (F4) to a selected position from other weft yarns (Yi). Thereby, a hook member 21 is capable of lifting the weft yarn (Y4) upward and winding the weft yarn with a device 30 for removing the weft yarn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multicolor rapier loom, in which when a weft insertion failure occurs, when the defective weft is removed from the warp shed via a weft removing device, weft threads which are continuous with the defective weft thread are removed. The present invention relates to a defective weft separating device in a multicolor rapier loom for separating the defective weft from the weft and ensuring the removal operation of the defective weft.

[0002]

2. Description of the Related Art When a weft insertion failure occurs, a defective weft thread (when weft insertion, the weft thread that causes the weft insertion failure, the same applies hereinafter) is automatically removed from the warp shed and the loom is automatically re-installed. There has been proposed a weft removing device for a jet loom for starting (JP-A-62-177258).

This product has a take-up drum having a lever projecting from it, and by arranging it on the weft insertion side of the woven fabric, the rear part of the defective weft is caught by the lever and the take-up drum is driven to cause a defect. The weft can be wound up and pulled to remove the defective weft that has been driven into the front of the cloth from the warp opening.
When a weft insertion failure occurs, the loom shall stop the new weft insertion operation during coasting without cutting the rear part of the defective weft thread, and after the stop, reverse the rotation. The defective weft shall be ejected and the weft removing device shall be operated. When the defective weft is pulled out, the rear part of the defective weft continues to the yarn feeder, so that the lever of the weft removing device can easily catch the defective weft.

[0004]

According to such a prior art, although it is good to use it for a jet loom, when it is applied to a multicolor rapier loom, a lever of a weft removing device ensures only defective wefts. There is a problem that it is difficult to catch and the removal operation of the defective weft becomes uncertain. That is, in the multicolor rapier loom, the weft yarns are selectively conveyed to the front position of the weft insertion rapier by the weft yarn selection fingers, and the rear part of the weft yarn is not cut until it is caught by the weft insertion rapier and the yarn feeder Even if the weaving machine stops due to poor weft insertion, the defective weft at that point was first weft-inserted in the vicinity of the cloth fell on the weft-inserting side. This is because it is almost at the same position as the normal weft and it is difficult to distinguish only the defective weft from the normal weft.

Therefore, in view of the problems of the prior art, an object of the present invention is to provide a fixed guide member and a weft separating member on the weft insertion side of a woven fabric so that when a weft insertion failure occurs, the weft insertion failure occurs. It is an object of the present invention to provide a defective weft separating device in a multicolor rapier loom for positively separating the weft from other wefts and reliably capturing only the defective weft.

[0006]

The structure of the present invention for achieving the above object is arranged between the woven fabric and the weft removing device on the weft insertion side of the woven fabric, and the weft inserted into the weft is predetermined. A fixed guide member that is positioned at a position and a weft separating member that is disposed in the vicinity of the fixed guide member are provided. The weft separating member moves to the separating position when a weft insertion failure occurs, and moves to the selecting position by the selecting finger. The gist is to separate the weft that is connected to the defective weft from other wefts.

The weft separating member may be a bar member having a bent portion in the middle and rotating vertically while moving vertically. Further, the weft separating member may be a bar member having a hook at the tip and moving in the horizontal direction.

Further, the weft separating member has a hook at the tip portion thereof, and can also serve as a hook member for catching a defective weft by the weft removing device.

[0009]

According to the structure of the present invention, the fixed guide member positions the weft inserted into the predetermined position, and the weft separating member separates the weft yarns connected to the defective weft yarns that have been moved to the selected position by the selection finger into other weft yarns. Since it is separated from the weft, the weft removing device can easily capture only the separated weft that is continuous with the defective weft and reliably remove the defective weft from the warp shed.

When the weft separating member is a bar material having a bent portion, the weft separating member lowers the whole and rotates to move to the separating position, whereby the weft separating member places the weft thread connected to the defective weft under the bent portion. It is possible to position the other weft and to position the other weft on the bent portion, so that the two can be reliably separated.

When the weft separating member is a bar that moves horizontally, the weft separating member moves horizontally in a predetermined direction,
A weft yarn or another weft yarn that is continuous with the defective weft yarn can be hooked on a hook to separate them.

Further, when the weft separating member has a hook and is also used as a hook member for catching the defective weft by the weft removing device, it is not necessary to separately provide the hook member, so that the entire structure is simplified. can do.

[0013]

Embodiments Embodiments will be described below with reference to the drawings.

The defective weft separating device in the multicolor rapier loom comprises a fixed guide member 11 and a weft separating member 12 as main members (FIG. 1) and is arranged on the weft inserting side of the woven cloth CL.

The weaving machine is a multicolor rapier weaving machine which selectively inserts wefts Yi (i = 1, 2, ...) Through a weft-inserting rapier R according to a predetermined weft-inserting pattern. It is assumed that the selection is made by the selection finger Fi (i = 1, 2 ...). That is, the weft Yi is not caught by the weft-inserting rapier R when the corresponding selection finger Fi is in the upper non-selection position, and therefore, the weft-insertion Pa is formed by the warp yarns P, P. Never be done. The weft Yi is caught by the weft-inserting rapier R when the selecting finger Fi descends to the lower selection position and is conveyed in front of the weft-inserting rapier R, and the warp opening Pa
Shall be inserted. In addition, weft Y inserted
i can be driven into the cloth fell F by a reed not shown to form the cloth CL.

The fixed guide member 11 is a deformed plate member arranged in parallel with the warp yarns P, P ...
An upper projecting portion 11a and a lower projecting portion 11b that project substantially horizontally from the rear side (the warp yarns P, P ... side, the same applies hereinafter) to the front side (weave cloth CL side, the same applies below) are formed. (Figure 2). The upper protrusion 11a is higher than the woven cloth CL, extends beyond the cloth fell F, and extends toward the front side, and the tip thereof is slightly bent downward. Further, the lower protrusion 11b is lower than the woven cloth CL, and further extends to the vicinity of the cloth fell F. Therefore, between the upper protrusion 11a and the lower protrusion 11b, on the front side,
A recess 11c is formed which opens slightly downward. In addition, the lower side 11e of the fixed guide member 11 is a curved line that extends obliquely and smoothly to the tip of the lower protrusion 11b.

The weft separating member 12 is a fixed guide member 11.
Is arranged in the vicinity of (Fig. 1). Weft separating member 12
Is a crank-shaped bar having a bent portion in the middle,
It moves to the upper retreat position (solid line in the figure) and downward, and the upper part of the bent part around the tip is about 90 forward.
It is possible to take a separation position (one-dot chain line in the figure) that rotates by a degree. On the weft insertion side of the woven cloth CL, a hook member 21, a weft cutter 23, and a weft removing device 30 are further provided.

The hook member 21 is disposed downward between the fixed guide member 11 and the weft separating member 12, and has an upper retracted position (solid line in FIG. 1) and a lower hooked position (see FIG. 1). (Dashed-dotted line). The weft cutter 23 is composed of a fixed blade 23a and a movable blade 23b, and the fixed blade 23a and the movable blade 23b are the weft separating member 12.
Together with this, it can move up and down integrally to take an upper retracted position (solid line in the same figure) and a lower operating position (dotted line in the same figure). When the movable blade 23b is entirely in the operating position, the movable blade 23b independently moves further downward to cut the weft yarn Yi sandwiched between the movable blade 23b and the fixed blade 23a.

The weft removing device 30 is arranged at a position higher than the woven cloth CL, and has a winding drum 31, a motor 32 that drives the winding drum 31, and a suction opening toward the winding drum 31. The nozzle 33 serves as a main member. A lever 31 a is provided upright on the peripheral surface of the winding drum 31. A groove 31b is formed in the winding drum 31 in the axial direction, and a slide cutter 31c is provided in the groove 31b.

Now, when the loom is operating normally,
The hook member 21 is in the upper retracted position, and the weft removing device 30 does not operate at all. On the other hand, the weft separating member 12,
The weft cutter 23 has an upper retracted position for each weft insertion,
It takes a lower separating position and an operating position, and the selection fingers Fi descends to the selection position only for each weft insertion according to the weft insertion pattern.
Others remain in the non-selected position.

Considering the case of inserting the weft Y4 (FIG. 1), first, the selection finger F4 corresponding to the weft Y4 is lowered to the selected position, and then the weft insertion rapier R starts to move forward. At the same time, the weft separating member 12 and the weft cutter 23 descend to the separating position and the operating position. Therefore, the weft Y4 captured by the weft-inserting rapier R is bent by the weft-separating member 12 in the separating position (one-dot chain line in FIG. 1) as the weft-inserting rapier R advances, and the weft cutter 23 in the operating position moves. It is guided so as to enter between the fixed blade 23a and the movable blade 23b. The selection finger F
In No. 4, the weft-inserting rapier R catches the weft Y4 and returns to the non-selected position at the same time. Then, subsequently, when only the movable blade 23b of the weft cutter 23 is lowered to cut the weft Y4, the weft-inserting rapier R advances while catching the tip of the cut weft Y4, and the weft Y4 is warped. It is possible to insert the weft into the opening Pa.

When the weft insertion of the weft Y4 is completed in this way, the weft insertion rapier R retreats to the original position outside the warp opening Pa, and the reed (not shown) can drive the weft Y4 into the cloth fell F. . At this time, the weft Y4 that has been weft-inserted
The rear part is continuous to a yarn feeder (not shown) through the selection finger F4. Therefore, the weft Y4 is fixed to the fixed guide member 1 at the end of the woven cloth CL as the reed advances.
1 is moved forward along the lower side 11e (in the direction of the arrow in FIG. 2), and when the beating is completed, the lower protrusion 11 of the fixed guide member 11 is
It can be positioned in the recess 11c of the fixed guide member 11 beyond the tip of b. However, the depression 1 at this time
The weft yarn Yi (i.noteq.4) previously inserted into the weft is also positioned in 1c.

As described above, the weft Yi positioned in the recess 11c is the weft separating member 12 in the retracted position and the weft cutter 23 in the retracted position as long as the selection finger Fi is in the non-selected position. It shall not interfere at all. In addition, the weft separating member 12 descends to the separating position, so that the selection finger F is passed through the bent portion thereof.
The weft Yi selected by i can be pushed to almost the same height as the traveling path of the weft insertion rapier R, and the weft Yi can be positioned in front of the weft insertion rapier R together with the selection finger Fi in the selected position. Further, the weft cutter 23 is guided by the weft separating member 12 and cuts the weft Yi advanced by the weft inserting rapier R by taking an operating position substantially at the same height as the traveling path of the weft inserting rapier R. it can. The weft separating member 1
2. The weft cutter 23 is assumed to return to the original retracted position immediately after the weft cutter 23 cuts the weft Yi.

Next, consider a case where weft insertion of the weft Y4 is defective due to some reason.

When a weft insertion failure occurs, a weft feeler (not shown) generates a weft insertion failure signal. Therefore, the loom is
After the inertial rotation of about 1 cycle, it automatically stops, but during this inertial rotation, the operation of the selection finger Fi is prohibited, so that the weft Y4 at this time, that is, the defective weft Y4a, is replaced by a new weft. Weft insertion of Yi is not done. Further, the weft separating member 12 and the weft cutter 23 are
As usual, after taking the separating position and operating position respectively,
The weft cutter 23 at this time returns to the retracted position.
Since there is no weft yarn Yi to be cut, it merely performs an idle motion. The same applies to the weft insertion rapier R.

When the loom is completely stopped, the weaving machine reverses its shedding device by means of the pick finder, and the defective weft Y
4a is put out into the warp opening Pa. At the same time, the selection finger F4 corresponding to the defective weft Y4a is forcibly driven to the selection position (FIG. 3). Therefore, the weft separating member 1
2. When the weft cutter 23 is moved to the separating position and the operating position (the same figure), the weft separating member 12 pushes down only the weft Y4 connected to the defective weft Y4a, and the weft Y4 is depressed in the recess 11c of the fixed guide member 11. Through the weft separating member 12 and the selection finger F4, it is possible to position at an appropriate position (solid line in the figure). That is, the weft Y4 at this time is
It is assumed that the hook member 21 is located immediately behind the hook member 21 and below the position where the lever 31a of the weft removing device 30 can reach (FIG. 4). In addition, another weft Yi (i ≠ 4)
Is sufficiently pushed forward by the weft separating member 12 in the separating position.

Then, when the hook member 21 is lowered to the hooking position and returned to the upper retracted position, the hook member 21 is
Since the defective weft Y4a and the weft Y4 connected to it can be lifted upward in a mountain shape (two-dot chain line in FIG. 3), after that, the motor 32 of the weft removing device 30 is started and the winding drum 31 is moved to the winding drum 31 in FIG. By rotating in the direction of the arrow, the lever 31a can catch the lifted defective weft Y4a and the weft Y4 and wind the defective weft Y4a and the weft Y4 on the winding drum 31. That is, the defective weft Y4a that causes weft insertion failure and is located in the warp opening Pa can be removed from the warp opening Pa by being wound on the winding drum 31 so as to be separated from the cloth fell F. At this time, the weft Y4 is assumed to be supplied by the same amount from the yarn supplying side (not shown) via the selection finger F4, and therefore the winding drum 31 includes the defective weft Y4a and the weft Y4 connected thereto. It shall be wound up at the same time.

When the entire length of the defective weft Y4a in the warp opening Pa is wound on the winding drum 31 (FIG. 5), the loom is immediately restarted. However, the completion of winding the defective weft Y4a may be detected by a sensor (not shown) that detects the tip of the defective weft Y4a, or may be detected by a timer that measures the rotation time of the winding drum 31.

When the weaving machine is restarted, the weft-inserting rapier R advances and captures the weft yarn Y4 (the same figure). After that, the weft cutter 23 is operated to cut the weft yarn Y4, and the weft separating member 12 and the weft yarn are separated. The cutter 23 is returned to the retracted position. In addition, the weft removing device 30 winds up the remaining weft Y4 from the winding drum 31 to the weft cutter 23 on the winding drum 31, and then operates the slide cutter 31c to cause a defect on the winding drum 31. The weft Y4a and the weft Y4 can be shredded and discharged as thread waste through the suction nozzle 33.

A series of operations of each member described above is as shown in the timing chart of FIG. However, the horizontal axis of the figure indicates the crank angle θ of the loom when the loom is in operation, and the time axis when the loom is stopped. Further, in the figure, the loom is assumed to stop at θ = 20 to 45 (degrees) after inertial rotation, and at this time, the weaving machine stops the selection fingers F4 corresponding to the defective weft Y4a and the weft Y4. Previously, it was driven to the selected position at the same timing as during normal operation. Further, the hook member 21
The lever 31 of the weft removing device 30 removes the defective weft Y4a and the weft Y4 while returning from the hooking position to the retracted position.
It is illustrated as having a pause so that a can be captured.

Incidentally, the above explanation is exactly the same when an arbitrary weft Yi (i ≠ 4) other than the weft Y4 causes the weft insertion failure. Needless to say, the number of weft yarns Yi may be any number of two or more.

[0032]

Other Embodiments In the previous embodiment, the weft separating member 12,
The operation of the hook member 21 is schematically illustrated as follows (FIG. 7).

When the weaving machine is stopped and the selection finger F4 is moved to the selection position, the weft yarn Y4 connected to the defective weft yarn Y4a is separated from the other weft yarns Yi (i ≠ 4) and moved downward ((A) in the figure). The two-dot chain line). Therefore, when the weft separating member 12 is lowered ((B) in the figure) and further rotated ((C) in the same figure), the weft separating member 12 causes another weft Yi to be moved by the portion above the bent portion. It can be pushed forward. At this time, the tip of the weft separating member 12 is located immediately rearward of the weft Y4. When the weft separating member 12 is further lowered to take the separating position (the same drawing (D), solid line in FIG. 3), the weft Y4 is moved by the bent portion of the weft separating member 12, the forward path of the weft inserting rapier R, the weft. Since the cutter 23 can be positioned at a predetermined height position corresponding to the operating position, the hook member 21 is subsequently lowered to the hooking position (two-dot chain line in FIG. 7D) and raised to the retracted position. By doing so, the weft yarn Y4, together with the defective weft yarn Y4a, becomes
It can be lifted up in a mountain shape by 1 ((E) in the figure,
(Two-dot chain line in FIG. 3).

The weft separating member 12 and the hook member 21
This operation can also be realized by the horizontally moving type weft separating member 13 that operates only when weft insertion is defective (FIG. 8).

By stopping the loom and driving the selection finger F4 to the selected position, the weft yarn Y connected to the defective weft yarn Y4a.
When 4 moves downward ((A) in the figure), weft separating member 1
No. 3 advances from the front side to the rear side immediately above the other weft yarns Yi (i ≠ 4) ((B) in the same figure). However, a downward hook 13a is formed at the tip of the weft separating member 13. Therefore, if the weft separating member 13 is moved downward in parallel ((C) in the figure) and is retracted to the front side by a predetermined distance ((D) in the figure), the weft separating member 13 will have the hook 13 thereof.
Since the weft yarn Yi can be hooked by a and the weft yarn Yi can be pulled out slightly forward, the hook member 21 is then lowered to the hooking position ((E) in the figure) and returned to the upper retracted position. As a result, the weft Y4 and the defective weft Y4a can be lifted up. The position of the weft separating member 13 at this time can be defined as the separating position in FIG. 8 (D).

The weft separating member 13 may advance from the rear side to the front side immediately below the weft Y4 moved downward by the selection finger F4 (FIG. 9). At this time, the weft separating member 13 has an upward hook 13a at the tip, and after advancing to the front side of the weft Y4 (the same figure (B), it is translated upward (the same figure (C)). ), By retracting the weft Y4 through the hook 13a by retracting the weft Y4 to the rear side by a predetermined distance ((D) in the figure), the weft Y4 can be moved rearward and can be lifted by the hook member 21. At this time, the separating position of the weft separating member 13 is the position shown in FIG. 9 (D).

The weft separating members 12, 13 are hook members 2
It is possible to use another weft separating member 22 that also serves as 1 (FIG. 10). However, the weft separating member 22 is a wide plate-shaped member, and at the tip thereof, in addition to the hook 22a for hoisting the weft Y4, a sloped surface 22 inclined to the front side.
b is formed.

When the weft separating member 22 is lowered after the weft Y4 has moved downward ((A) in the same figure) ((B) in the same figure), other wefts Yi (i ≠ 4) other than the weft Y4 are
It is pushed out to the front side of the weft separating member 22 through the inclined surface 22b (FIG. 7C). Therefore, after the weft separating member 22 is further lowered to reach the separating position where the hook 22a is located below the weft Y4 (FIG. 7 (D)), the weft separating member 22 is pulled upward to obtain the weft Y4. Can be lifted up by the hook 22a ((E) in the same figure).

Weft separating member 2 which also serves as hook member 21
2 may have the same shape as the hook member 21 (see FIG. 1).
1). However, at this time, the weft separating member 22 is temporarily stopped while descending to the separating position ((B) in the figure),
By moving parallel to the front side, another weft Yi (i ≠
4) is pushed out to the front side ((C) in the figure) and lowered to the separating position ((D) in the figure). At the separating position, the weft yarn Y4 can be lifted upward by parallel movement to the rear side by a predetermined distance ((E) in the figure) and then by raising it ((F) in the figure).

In the above description, the stopping operation of the loom when a weft insertion failure occurs and the reverse feed operation after the stop are described as follows.
It is not necessarily fixed and can be changed arbitrarily. For example, in a rapier loom, instead of reversing the entire loom, only the shedding device is reversed by a pick finder, so the required number of reversals should be adjusted to the number of inertial rotations until the loom stops. Good. Moreover, the hook member 21, the weft cutter 23, and the weft removing device 30 can be arbitrarily changed in their specific shapes, operation sequences, and the like. For example, the hook member 21 may take a retracted position downward and push only the weft yarn Y4 connected to the defective weft yarn Y4a up to the vicinity of the weft yarn removing device 30, or the weft yarn Y4 via a suitable suction pipe. May be conveyed to the weft removing device 30.

[0041]

As described above, according to the present invention, by providing the fixed guide member and the weft separating member, the weft separating member moves to the separating position when weft insertion failure occurs. Since the weft yarns connected to the defective weft yarn can be separated from other weft yarns, the weft removing device can accurately capture only the separated weft yarns connected to the defective weft yarn and remove the defective weft yarns from the warp shed. Therefore, there is an excellent effect that the defective weft removing operation when a weft insertion failure occurs and the subsequent automatic restart operation of the loom can be ensured.

[Brief description of drawings]

FIG. 1 is a perspective view of the overall configuration

[Fig. 2] Operation explanatory diagram (1)

[Fig. 3] Operation explanatory diagram (2)

[Fig. 4] Operation explanatory diagram (3)

FIG. 5 is an operation explanatory diagram (4)

FIG. 6 Timing chart

[Fig. 7] Operation explanatory diagram (5)

FIG. 8 is a view (1) corresponding to FIG. 7 showing another embodiment.

FIG. 9 is a view corresponding to FIG. 7 showing another embodiment (2).

FIG. 10 is a view corresponding to FIG. 7 showing another embodiment (3).

FIG. 11 is a view corresponding to FIG. 7 showing another embodiment (4).

[Explanation of symbols]

 CL ... Woven fabric Yi (i = 1, 2 ... 4) ... Weft Y4a ... Bad weft Fi (i = 1, 2 ... 4) ... Selection finger 11 ... Fixed guide member 12, 13, 22 ... Weft separating member 13a, 22a … Hook 30… Weft removing device

Claims (4)

[Claims] 1. A fixed guide member which is disposed between the woven cloth and the weft removing device on the weft insertion side of the woven cloth and positions the weft inserted weft at a predetermined position, and a fixed guide member disposed near the fixed guide member. A weft separating member to be installed, the weft separating member is moved to a separating position when a weft insertion failure occurs, and separates the weft that is connected to the defective weft moved to the selected position by the selection finger from other wefts. A defective weft separating device in a multicolor rapier loom characterized by the above. 2. The defective weft yarn in a multicolor rapier loom according to claim 1, wherein the weft separating member is a bar member having a bent portion in the middle and rotating vertically while moving up and down. Separation device. 3. The defective weft separating device in a multicolor rapier loom according to claim 1, wherein the weft separating member is a bar material having a hook at a tip end thereof and moving in a horizontal direction. 4. The multicolored product according to claim 1, wherein the weft separating member has a hook at a tip portion thereof, and is also used as a hook member for catching a defective weft by the weft removing device. Defective weft separating device for rapier loom.