JP5458055B2 - Oblique thread transfer device in a four-axis loom - Google Patents

Description

The present invention relates to an improvement of a skew yarn transfer device in a four-axis loom.

A four-axis woven fabric is a woven fabric in which warp yarns and weft yarns and two oblique yarns intersecting the bias direction are overlapped. Such a woven fabric has become a stable woven fabric with less direction of strength and elongation than a normal biaxial woven fabric, and has recently attracted attention in various fields. The inventors of the present invention have been working on the development of a four-axis woven fabric and its loom from an early stage, and have made many proposals for these technologies in Japanese Patent Laid-Open No. 63-92751 (Patent Document 1) and six other patent documents. .

There are various methods for the oblique yarn transfer device in the four-axis loom. As shown in FIGS. 9 and 15 of Patent Document 1, for example, two oblique yarn rows are formed by two forward and reverse screw rolls. While moving the thread from right to left and vice versa, the warp thread is inserted between the swiveling threads while passing the slant thread at the left and right ends of the screw roll, and the weft thread is injected into the four-axis fabric. Weave. In this case, conventionally , the rotation of the screw roll is constant, and a large number of diagonal threads in each valley of the screw are fed at a constant speed at a single rotation pitch.

Further, in Patent Document 2, the front and back diagonal yarns are formed respectively, the intermediate layer is a weft, the warp yarn is entangled with the front and back diagonal yarns, and the front and back textures are the same. A four-axis woven fabric has been proposed, and in order to weave it, a set of oblique yarn traversing means is used so that the front oblique yarn surface and the reverse oblique yarn surface always form a weft entry opening. In this method, wefts are injected to form an intermediate layer against the warp yarns on the front and back sides of the warp healds on the front side and the back side . 1,5) .

JP-A 63-92751 JP 2002-38356 A

Even with the above-mentioned conventional method, when the number of oblique yarns to be driven is small, there was no particular problem in the opening operation with warp or oblique yarns, but the screw roll pitch was narrow and many oblique yarns were used. If we try to weave a dense woven fabric efficiently, the load will fluctuate greatly, affecting the other parts of the loom, and in particular, the timing with the other mechanism will change slightly, resulting in a mistake in the warp pushing opening. In some cases, this could lead to a fatal defect that causes woven scratches on the product.

Also, even if weaving a net-like woven fabric using a relatively small number of diagonal threads, it is necessary to increase the weaving speed of the loom in order to efficiently weave. A mistake occurred in the opening, resulting in a woven flaw in the product. It is an object of the present invention to improve a skew yarn transfer device for the purpose of improving the performance of a four-axis loom.

The oblique yarn transfer device in the four-axis loom of the present invention temporarily stops or decelerates the oblique yarn that operates in synchronism with the timing of the warp opening of the warp opening device with respect to the oblique yarn weaving width direction transfer device by the screw roll. Ru Monodea provided the means. That is, warp 1 rotational speed changing means der screws rolls giving unequal speed rotation in a rotary is, temporary stop position or deceleration position of the non-uniform speed rotation of the screw roll axis in synchronism with the timing of the shedding Or a weft transfer device in a four-axis loom characterized by opening a weft thread and inserting a weft thread, thereby extending the weft entry time by temporarily stopping or slowing down the weft thread, and ensuring Enable weft weaving.

Here, as a means for temporarily stopping or decelerating the oblique yarn, as described in the specification before the present invention division, a method of providing an axial swing means for the screw roll with respect to the oblique yarn transfer device and controlling it, for example, And a cam provided on the rotary shaft of the screw roll and a cam follower provided on the rotary bearing side of the screw roll. This structure is a preferable means because the load applied to the rotating shaft of the screw roll is small.

Similarly, as another example of the axially swinging means of the screw roll, there is a combination of a cylinder provided in parallel with the rotation axis of the screw roll and an access control means for the cylinder piston.

In the slanting thread temporary stop or deceleration means of the present invention, the rotational speed variable means of the screw roll shaft itself is employed. A preferred example of such a device is a slant yarn transfer device provided with a rotary slider mechanism that provides non-constant speed rotation within one rotation of the screw roll shaft. This rotary slider mechanism can be used in the same manner with the Geneva mechanism.

As another example of the screw roll rotation speed varying means for giving non-constant speed rotation within one rotation of the screw roll shaft, there is an application of a rotation control mechanism of a servo motor for driving the rotation of the screw roll. That is, a servo motor having a rotation control means (for example, a known rotary encoder) that applies non-constant speed rotation to the screw roll shaft is used as the screw roll driving means.

By adding these structures to the oblique yarn transfer device of a four-axis loom, the problems of the present invention can be solved, and the following effects can be obtained.

In the four-axis loom, even if the weaving of a dense woven fabric using a large number of diagonal threads, the thread roll pitch is so narrow that the operation of opening with a warp or diagonal threads is hindered. In the transfer of the oblique yarn, by adopting a means for temporarily stopping or decelerating the oblique yarn to the oblique yarn transfer device, there is no shortening of the weaving opening time of the warp or the oblique yarn even if the rotational speed of the loom is increased, It became possible to weave efficiently. That is, when trying to operate the loom at high speed, the load fluctuates greatly, affecting the other parts of the loom, and in particular, the timing with the other mechanism changes slightly, causing a mistake in the warp pushing opening. The fatal defect that causes woven scratches on the product can be solved.

In this way, by adopting the oblique yarn transfer device of the present invention, even when weaving a net-like woven fabric using a relatively small number of oblique yarns, a mistake occurs in the warp pushing opening, The fact that the scratches on the weave were conspicuous was solved. Of course, the improvement of the weaving speed could be remarkably improved.

It is an organization chart showing an example of a four-axis fabric. It is a principal part side view of the state which pushed the warp from the up- and- down direction with respect to the diagonal thread surface of an up-and-down opening state, respectively, opened it, and injected the weft. FIG. 4 is a side view of a main part in a state where warp yarns are pushed in between the oblique yarn surfaces and opened to open the weft yarns. Superimposed opened warp pulling their respective between oblique yarn against oblique thread surface is a fragmentary side view of a state where the injection of the weft. The cam roll provided on the rotary bearing side of the screw roll and the cam provided on the rotary shaft of the screw roll as the axial swinging means of the screw roll, which provides the same effect as the screw roll rotational speed changing means of the present invention It is a side view which shows the oblique thread transfer apparatus comprised by these. Side surface showing a slant transfer device constituted by a swing cylinder provided on a rotary shaft of a screw roll as an axial swing means of the screw roll, which can obtain the same effects as the rotational speed variable means of the screw roll of the present invention. FIG. It is a side view which shows the rotation slider mechanism which gives non-constant speed rotation to a screw roll axis | shaft as a rotational speed variable means of the screw roll of this invention. FIG. 5 is a side view showing a rotation control mechanism by a rotation driving servo motor that gives non-constant rotation within one rotation of a screw roll shaft as a rotation speed variable means of the screw roll of the present invention.

Embodiments of the present invention will be specifically described below with reference to the drawings. First, a four-axis woven fabric and its weaving method will be described. FIG. 1 is a structure diagram showing a woven structure of a four-axis woven fabric with coarse eye intervals, and FIGS. 2 to 4 are side views of a main part showing a layout and movement of a loom for weaving them.

As shown in FIG. 1, a four-axis woven fabric is formed with diagonal yarns 3, 4 perpendicular to the bias direction with respect to a normal biaxial woven fabric composed of warp 1 and weft 2. The cross-sectional structure of the woven fabric shown in FIG. 1 is that the front side and the back side of the woven fabric are formed with diagonal yarns 3 and 4, respectively, the intermediate layer is the weft 2, and the front side warp 1a or the back side warp 1b is the weft 2 and the surface. The textures of the front and back surfaces are the same weaving structure with the oblique thread 3 or the back oblique thread 4.

In this case, the front side warp 1a or the back side warp 1b is entangled alternately with the front and back oblique yarns 3 and 4 so as to pass between all the wefts 2, but there are various ways of entwining the warp 1 It is done. For example, the warp 1 has a structure in which only one of the oblique yarns 3 or 4 and the weft 2 are alternately entangled. Although the structure is somewhat complicated, the front side warp 1a or the back side warp 1b also has a structure in which wefts 2 and diagonal threads 3, 4 are alternately entangled every other two wefts. And all these structures are the same weave structure.

Such a method of weaving a four-axis fabric can be operated by the layout and movement of the four-axis loom. FIG. 2 shows an example of this. In order to form the front and back surfaces of the woven fabric with the diagonal yarns 3 and 4, respectively, the front diagonal yarn surface 11 and the reverse diagonal yarn surface 12 are always wefts by a set of diagonal yarn traversing means 10. 2 is formed, and the weft yarns 2 are injected to form an intermediate layer with respect to the weft insertion opening 13 while the front and back warp healds 14, 15 Then, the warp yarns 1a and 1b are entangled with the front and back diagonal yarn surfaces 11 and 12 so that the front and back have the same fabric. Here, the structure of one set of the oblique thread traversing means 10 is characteristic, and a dividing plate 18 is provided between the front side oblique thread transfer roll (upper screw roll) 16 and the back side oblique thread transfer roll (lower screw roll) 17. The weft insertion opening 13 is always secured. Therefore, the warp healds 14 and 15 on the front side and the back side need only be run within the range of the opening 13 as shown in the figure, and there is an advantage that only one shuttle or rapier 19 is required.

Specifically, the front and back warp healds 14 and 15 are both greatly opened to the outer D and E points of the front and back warp thread surfaces 11 and 12, and the warp healds 14, 15 When one weft is injected every 15 reciprocations, and the weft is driven with a punch, and the warp yarn is entangled with the front and back diagonal yarn surfaces, the front and back structures shown in FIG. Become. Here, if the injection of the weft yarns 2 is performed every two reciprocations, the warp yarns are entangled with every other weft yarn, and the weft yarns that are entangled with the warp yarns and the free weft yarns that are not entangled appear alternately.

In order to make other structures, the front and back side warp healds 14 and 15 are opened, and weft injection is performed in units of two at each alternate opening. The knitted yarn surfaces are alternately entangled to make the front and back structures the same. Any of these weave structures can be woven with the loom of FIG.

In FIG. 2, the dividing roll 18 between the transfer rolls (upper and lower screw rolls) 16 and 17 is opened with a dividing plate 18 so as to always secure the entry space for the rapier 19. A delivery means is required. This delivery means does not affect the width of the dividing plate 18 so much.For example, it is forcibly fed by a slanting yarn delivery lever, or a gradient is provided on the end surface of the dividing plate 18 and the inclination is naturally inclined along the inclination. What is necessary is just to make a thread | yarn hand over.

In addition, as a four-axis woven fabric having the same woven structure on the front and back sides, the surface A and the back surface B of the woven fabric are respectively formed on the surface of the weft 2 in contrast to the above-described woven fabric, and the intermediate layer is composed of the oblique yarns 3 and 4. There is a crossing surface in which a warp 1 is entangled with front and back wefts 2a and 2b. This structure can be woven only with one set of warp healds 14 as shown in FIGS.

That is, with the layout and movement looms shown in FIGS. 3 and 4, a pair of diagonal traverse means 10 and warp healds 14 are alternately swung to form the front and back surfaces of the fabric with wefts 2 respectively. The front and back oblique yarn surfaces 11 and the back oblique yarn surface 12 are always located on the opposite side of the weft insertion opening 13 of the weft 2 so as to form the front and back weft surfaces with respect to the opening 13. While entering 2, the warp 1 is entangled with the weft surfaces of the front and back with a set of warp healds 14 to form the same fabric on the front and back. In this case, a mechanism for swinging the entire set of the oblique thread traversing means 10 alternately with the warp heald 14 is required, but it is not technically complicated.

Thus, in the conventional weaving structure with the front and back, the weft yarns 3 and 4 come together on the front side, and the weft 2 comes on the back side, but the weaving structure is completely the same as in FIG. In the layout, the set of the oblique traverse means 10 is fixed, and only the warp heald 14 is oscillated and the weft is driven only below the oblique thread surface. The only difference is whether it is fixed or not.

3 and 4, the structure of the four-axis fabric woven by the mechanism of alternately swinging the entire set of the oblique traverse means 10 and the set of warp healds 14 is the same on the front and back sides. Become woven. As described above, even if the two sets of warp healds shown in FIG. 2 are simultaneously or alternately entangled with the warp and the weft and the warp, the front and back structures are the same. In short, as long as the surface A and the back B of the woven fabric are respectively formed on the surface of the weft 2 and the intermediate layer is an intersecting surface of the oblique yarns 3 and 4, as long as the warp entanglement is regular, the front and back structures Are the same fabric.

The oblique yarn transfer device in the four-axis loom of the present invention is a warp opening device for the weft width direction transfer device of the upper and lower oblique yarns 3, 4 by the upper and lower screw rolls 16, 17 as the front and back side oblique yarn transfer rolls. as a temporary stop or deceleration means of the swash yarn synchronization with operation timing of the warp shedding, the rotational speed variation means of the screw roll giving unequal speed rotation in one rotation of the screw roll shaft is provided, this unequal speed The opening of the warp or the oblique yarn and the insertion of the weft are inserted at the temporary stop position or the deceleration position of the rotation . In other words, in synchronism with the timing of the warp opening, provision of a temporary stop position or deceleration position for a large number of diagonal threads stretched around the upper and lower screw rolls 16, 17 extends the weft entry time and ensures Weaving is possible.

Here, the means for temporarily stopping or decelerating the slant yarn is a system in which the slant yarn transfer device is controlled by providing a means for swinging the screw roll in the axial direction, and obtained by the means for varying the rotation speed of the screw roll of the present invention. The same effect as that obtained can be obtained. For example, as shown in FIG. 5, the cam mechanism 5 is employed. The details of the cam mechanism 5 are as follows. The upper and lower cams 22 and 23 and the upper and lower screws provided on the rotary shafts 20 and 21 of the upper and lower screw rolls 16 and 17 as axially swinging means of the upper screw roll 16 and the lower screw roll 17, respectively. The cam followers 26 and 27 are provided on the fixed side of the rotary bearings 24 and 25 of the rolls 16 and 17. The upper and lower cams are the same shape, and if a part of the cam shape is oriented in the direction perpendicular to the axis, the diagonal rotation is sent in this part at normal rotation, but if a gradient is added, the feed pitch of the screw roll is increased or decreased. Or stop it.

Therefore, for example, the thread pitch of the fixed screw roll is 3.175 mm, and the diagonal thread that follows it moves 3.175 mm in one rotation (360 °). Therefore, the diagonal threads attached to the upper and lower screw rolls 16 and 17 move rightward and leftward, but the movement corresponds to 315 ° of one rotation (360 °) by the cam mechanism attached to the screw roll. By moving the screw rolls in the axial direction, the left and right diagonal threads are stopped, and if they are quickly returned to their original positions at a remaining angle of 45 °, they can be moved by 1.175 mm per pitch. . Further, it is preferable to adjust the stop angle and the movement angle of the diagonal yarn within the range of the stop angle of 180 ° to 330 ° and the movement angle of 180 ° to 30 ° according to the rotational speed of the loom and the properties of the diagonal yarn. In this case, if the fabric width is 1,000 mm, the number of diagonal threads is about 225 × 2 = 450 in the vertical direction. This structure is a preferable means because the load applied to the rotating shafts 20 and 21 of the screw rolls 16 and 17 is small.

Similarly, FIG. 6 illustrated as another example of the axially swinging means of the screw roll is a swinging cylinder constituted by a swinging cylinder provided on the rotating shaft of the screw roll as the axially swinging means of the screw roll. It is a side view which shows the oblique thread transfer apparatus using the lever mechanism. In the case of this oscillating cylinder / lever mechanism 6, there is a combination of a cylinder 36 provided in parallel with the rotary shafts 20 and 21 of the upper and lower screw rolls 16 and 17 and an access control means for the cylinder piston. The end of the cylinder piston 37 oscillates at a fulcrum 28 and the upper end of an oscillating lever 31 provided with upper and lower locking pins 29, 30 so that the upper and lower rotary shafts 20, 21 can be moved left and right. Connected. Therefore, if the movement of the cylinder piston 37 is controlled, the upper and lower screw rolls 16 and 17 move in the left and right opposite directions, and the upper and lower oblique threads 3 and 4 are moved closer to and away from each other, thereby widening or narrowing the interval between the upper and lower oblique threads. As it spreads, the warp heald is actuated when spread and promises a reliable opening.

In the present invention, as a means for temporarily stopping or decelerating the oblique yarn, a rotational speed varying means for applying non-constant speed rotation to the screw roll shaft itself is employed. A preferred example of such a device is a rotary slider mechanism 7 that applies non-constant speed rotation to the screw roll shaft, as shown in FIG. In this rotary slider mechanism 7, a slider 34 is provided at the tip of a short constant speed rotary arm 33 provided on the drive shaft 32, and an upper screw roll rotary shaft 20 is provided at a position away from the drive shaft 32. Thus, a non-constant velocity rotating arm 38 having a long hole 35 through which the slider 34 slides back and forth is provided so as to rotate about this axis. In this way, in the upper half of the figure, the slider 34 is near the axis of the long hole 35 and rotates quickly, and in the lower half of the figure, the slider 34 is near the axis far from the long hole 35 and rotates slowly. In other words, the rotation speed of the lower half is nearly half that of the rotation speed of the upper half. As a result, when the weft is inserted by opening the warp or the warp at this position, a reliable operation is promised. Is done. In place of the rotary slider mechanism, a deformable Geneva mechanism can be used in the same manner.

As another example of the rotational speed variable means of the screw roll in the present invention, which gives non-constant speed rotation to the screw roll shaft, as the rotational speed variable means of the screw rolls 16 and 17, the servo motor control mechanism 8 shown in FIG. Is mentioned. As the servo motor control mechanism 8, a rotation control means by a normal rotary encoder that electrically connects the rotation drive servo motor 39 to the upper screw roll rotating shaft 20 and electrically controls the rotation of the motor is suitably used.

By adding these various mechanisms to the screw roll, the problems of the present invention can be solved, and even if the rotational speed of the loom is increased, there are few mistakes in the warp pushing opening, and there is a fatal defect that causes woven scratches on the product. It can be solved, and it has become possible to efficiently weave from a net-like four-axis fabric to a dense four-axis fabric.

1 Warp (1a Front side warp, 1b Back side warp)
2 Weft (2a Front side warp, 2b Back side warp)
3 Surface diagonal thread (upper diagonal thread)
4 Back diagonal thread (lower diagonal thread)
5 Cam mechanism 6 Cylinder / lever mechanism 7 Rotating slide mechanism 8 Servo motor control mechanism
10 Oblique thread traverse means
11 Front diagonal surface
12 Back diagonal thread surface
13 Weft opening
14 Surface side warp heald
15 Back side warp heald
16 Front side diagonal thread transfer roll (upper thread roll)
17 Back side oblique thread transfer roll (lower screw roll)
18 Divider
19 Shuttle or rapier
20 Upper screw roll rotation axis
21 Bottom screw roll rotation axis
22 Top cam
23 Lower cam
24 Rotating bearing
25 Rotating bearing
26 Upper Cam Followers
27 Lower cam follower
28 fulcrum
29 Upper locking pin
30 Lower locking pin
31 Swing lever
32 Drive shaft
33 Constant speed arm
34 Slider
35 Slotted hole
36 Non-uniform speed arm
37 Cylinder piston
38 cylinders
39 Servo motor
32 Drive shaft
33 Constant speed arm
34 Slider
35 Slotted hole
36 Non-uniform speed arm
37 Cylinder piston
38 cylinders
39 Servo motor

Claims (3)

To weaving width direction transfer device of the swash thread by thread roll, warp shedding device shed timing synchronization with oblique thread transfer transmission system for a four-axis weaving machine provided with a temporary stop or deceleration means of the swash yarn operating In
The slanting thread temporary stop or deceleration means is a screw roll rotation speed variable means for providing non-constant speed rotation within one rotation of the screw roll shaft in synchronization with the timing of warp opening.
A warp yarn transfer device in a four-axis loom characterized by opening a warp or a warp yarn and inserting a weft at a temporary stop position or a deceleration position of the non-constant speed rotation. 2. The oblique thread transfer device for a four-axis loom according to claim 1, wherein the rotation speed variable means of the screw roll that gives non-constant speed rotation within one rotation of the screw roll shaft is a rotary slider mechanism. 2. The oblique thread transfer device for a four-axis loom according to claim 1, wherein the rotation speed variable means for the screw roll that gives non-constant speed rotation within one rotation of the screw roll shaft is a rotation control mechanism of a servo motor for driving the rotation of the screw roll. .

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