JPS6039778B2 - Circular loom warp alignment device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a warp pulling and aligning device for a circular loom.

In general, the warp supply method for circular looms involves drawing a large number of warp threads into the loom body from a warp supply source consisting of a large number of creel packages, etc., into the loom body by the loom's fabric pick-up force (a passive supply method is adopted). In such circular looms, especially when the warp supply path from the warp supply source to the loom main body becomes long, there is a possibility that the supply warp threads become abnormally loose between each supply warp thread over time during weaving operations. The degree of tension (tension) when something or something that makes you nervous comes out
It is unavoidable that non-uniformity occurs in the weaving process, and if this situation increases, it will not only cause uneven weaving in the woven product, but also cause thread breakage, which will hinder the weaving operation. Therefore, dancing levers are placed around the main body of the circular loom at a ratio of one for each warp, and are biased backwards by springs and have a limit of the front and rear movement angles. - Supply each warp thread one by one to the loom main body via its dancing lever, and maintain each warp thread at a constant tension by the urging force of a spring individually by the forehead movement of the dancing lever;
This is done to equalize the tension between each supplied warp yarn. However, in this case, each dancing lever has its own angle limit, and if the warp yarn becomes loose or tense beyond that limit, it is inevitable that it will no longer perform its function. When the uneven accumulation of tension between warp threads increases and exceeds its limit, be sure to completely stop the loom, significantly interrupt the weaving process, and manually remove each thread one by one. This requires work to adjust the tension of the warp threads to make the tension between the warp threads uniform, which poses a problem in that it impedes weaving efficiency. In order to solve the above-mentioned problems, the present invention solves the uneven tension between the warp yarns that occurs during weaving work by dancing the warp threads each time the loom body is temporarily stopped for changes, etc. that always occur during weaving work. This system was designed to automatically and efficiently and effectively correct the tension in relation to the levers to ensure uniform alignment. A warp feed roller having an appropriate surface friction force is disposed in the warp supply path of the loom so that a large number of warp yarns uniformly come into contact with each other in a roundabout manner. The loom rotates in the forward direction in the warp supply direction, but when the weaving operation of the loom body is temporarily stopped, the rotation drive means forcibly rotates the dancing levers in the forward direction in the warp supply direction to bring the dancing levers all at once to the limit of the rear warp. The dancing lever is rotated in the opposite direction to the warp supply direction to return the dancing lever to the neutral position at the limit of the movement of the front and back bonds at once;
Furthermore, in the same way, at a position closer to the warp supply source side than the feed roller when viewed from the direction of supply of the warp threads in the warp supply path,
A warp slack absorbing device is provided which is configured to rotate in a direction to absorb the warp slack in conjunction with the rotation of the feed roller when the weaving operation of the loom main body is temporarily stopped and the feed roller rotates in a direction to absorb the warp slack. That's true.

Next, embodiments of the apparatus of the present invention will be described in detail with reference to the drawings.

In FIG. 1, a large number of warp threads 2 drawn out from a large number of packages as a warp supply source all pass from a guide roller 3 through a perforated plate 4, and then from a dropper 5 to a comb guide 6.
, a guide roller 7, a slack absorbing device 8 consisting of two tensioning rollers 8, 8b, and a relatively large diameter feed roller 9 having an appropriate surface friction force.

Do.

The capper 5 is intended to provide appropriate frictional resistance to each bonito thread, and is constructed by having a hairpin-shaped weight mounted on each warp thread, but is not limited to this, and may also be used to provide appropriate resistance to each warp thread. Alternatively, each package 1 may be provided with rotational resistance. As the feed roller 9, for example, one whose surface is coated with rubber is used. The warp yarns 2 that have reached the feed roller 9 in this manner are further supplied to the circular loom main body 12 via two guide rollers 10 and 11. The warp threads 2 joined to the loom main body 12 pass from the hole guide 13 to the dancing lever 14 to the heald 15 of the shedding device to the gauge ring 16, during which time they are inserted into the weft by a ring 17 running in a circular shape to form a cylindrical woven fabric 18. It is wound upwards.

The dancing levers 14 are arranged around the loom main body 12 in the same number as the number of warps, one for each warp. As shown in FIG. 2, this dancing lever 14 includes an upper arm 14a and a lower arm 14b that are integrated, and is movably mounted on an annular shaft 19 disposed to surround the loom main body at the intermediate portion thereof. By inserting the warp threads 2 into a guide hole 20 provided at the upper end of the upper arm 14a and urging the lower arm 14b inwardly with a spring 21, the upper arm 14a is always turned outward. It is in an energized configuration. As a result, the upper arm 14a tilts forward inwardly when the tension of the warp threads 2 is strong, as shown by the imaginary line, and tilts forward inwardly if the tension is weak, absorbing the slack in the sewing threads 2, and straightening the warp threads 2. Each book is kept at a constant tension. In addition, when the upper arm 14a is tilted forward or rearward within a certain angle range, the dancing lever 14 is configured such that when the upper arm 14a is tilted forward or backward to a certain extent, the lower arm 14b or the upper arm 14a is moved to the stopper 22, 23.
I'm trying to prevent this from happening any further.
When the tension of the sewing thread 2 becomes stronger or weaker and the shear reaches its limit, its function is stopped. A feed roller 9 and a slack absorbing device 8 provided in the supply path of the warp threads 2 to the loom main body 12, and two guide rollers 7 and 1 in front and behind them.
0 are arranged together in one gate-shaped frame 24 as shown in FIG. The feed roller 9 is located at the top of the frame 24 between its side plates 24a and 24b.
5, and two guide rollers 7 and 10 are also rotatably supported between both sides 24a and 24b at the lowest position of the frame 24, respectively. The slack absorbing device 8 is disposed at a position before the feed roller 9 when viewed from the warp supply direction, and is rotatable in itself and is rotatable around a single touch, that is, it can revolve around a relatively 4 mm diameter. It consists of book tensioning rollers 8a and 8b.

That is, two tensioning rollers 8a, 8b arranged in parallel at appropriate intervals are connected to connecting plates 26a, 26 at both ends thereof.
Both side plates 2 of the frame are supported between the feed roller 9 and the guide roller 7 by shafts 27a and 27b that are rotatably supported on the frame and protrude outward from the center of the connecting plates 26a and 26b.
It is rotatably supported between 4a and 24b. The shaft 25 of the feed roller 9 protrudes outward from one side plate 24a of the frame, and a sprocket wheel 28 is attached thereto. A chain 31 is stretched between a sprocket wheel 30 attached to the shaft of a torque motor 29 which can rotate in reverse, and thereby the feed roller 9 is appropriately rotated by the torque motor 29.

Further, the shaft 27a of the slack absorbing device 8 also protrudes outward from the one side plate 24a of the frame to connect the one-way clutch 32Z.
A sprocket wheel 33 is attached through the sprocket wheel 33, and the chain 31 is engaged with the sprocket wheel 33 at an intermediate portion thereof. In this way, all the warp threads 2 pass from the guide roller 7 between the two tensioning rollers 8a and 8b, contact the feed roller 9, and bypass the guide roller 9.
It is designed so that it is guided from the loom towards the loom itself.

During operation of the loom body 12, the torque motor 29 rotates forward to force the feed roller 9 to rotate forward in the direction in which the warp yarns 2 are supplied (counterclockwise as shown by the solid arrow in FIG. 1), or
Alternatively, the warp feed roller 9 is passively rotated in the forward direction by the advancing force of the warp threads 2 being drawn into the loom body; in the former case, it is an active feeding method;
The latter case is a passive supply method.

In any case, while the loom body 12 is in operation, the feed roller 9 rotates forward in the warp supply direction as the warp advances, so that the warp is smoothly supplied to the loom body. On the other hand, when the operation of the loom main body 12 is stopped, the torque motor 29 initially rotates forward for a while to forcibly rotate the feed roller 9 forward in the warp feeding direction, and then rotates reversely for a predetermined time to feed the feed roller. Force the roller 9 in the direction opposite to the warp supply direction (
It is arranged to rotate in the time direction (indicated by the broken line arrow in FIG. 1).

Naturally, the sprocket wheel 33 of the slack absorbing device 8 is also rotated in accordance with the forward and reverse rotation of the torque motor 29, but the rotational force is applied to the shaft 27a by the one-way clutch 32 when the feed roller 9 rotates in the reverse direction.
It is arranged so that it is transmitted to

That is, the two tensioning loaves 8a and 8b are interlocked only when the torque motor 29 is reversely rotated by the wasoway clutch 32 and the feed roller 9 is reversely rotated in a direction opposite to that of the warp threads 2. The warp threads 2 rotate or revolve counterclockwise around the shaft 27 as shown by the dashed arrow in FIG. When the feed roller 9 rotates and rotates in the forward direction in the direction in which the warp yarns 2 are supplied, the feed roller 9 freely rotates or revolves independently of the rotation. The operation of the torque motor 29 as described above can be switched between normal rotation or free rotation while the loom main body 12 is operating, and normal rotation and reverse rotation when the loom main body 12 is stopped, using a manual switch or the operation of the loom main body 12. This is done dynamically by an electric circuit that works in conjunction with the operations of operation and shutdown.

In the above device, when the loom main body 12 is operated to proceed with weaving, the individual warp threads 2 become unnecessarily tensed or loosened due to frictional resistance, slippage, and various other causes in the supply path. When something comes out, the tension in the individual warp threads 2 becomes uneven.

Unnecessary tension or slack generated in the individual warp threads 2 is removed or absorbed by the individual dancing levers 14 as described above, and thereby all the warp threads are adjusted to a constant and appropriate tension for smooth weaving. It goes down. As a result, the individual dancing levers 14 naturally become irregularly tilted forward or backward, but as weaving progresses further, unnecessary tension and slack in the individual ridges 2 accumulate and increase. Eventually, the operating limit of the dancing lever 14 will be exceeded. In other words, some of the individual dancing levers 14 come into contact with the stoppers 22 and 23 and no longer tilt forward or backward, thereby losing their function, and therefore the warp threads 2 are no longer adjusted to a constant and appropriate tension. This makes it impossible to weave smoothly. However, in this device, when the loom main body 12 is temporarily stopped, such as when the loom body 12 is temporarily stopped, such as when the loom body 12 is stopped due to the unbalanced tension that occurs during weaving, the operation of the feed roller 9 and the slack absorbing device 8 is reduced. This automatically aligns and corrects the alignment uniformly, and its operation will be explained next.

When the loom main body 12 stops operating, the torque motor 29 first rotates forward as described above, and the feed roller 9 is once forcibly rotated forward in the direction in which the warp threads 2 are fed.

Then, all the warp threads 2 are sent out in the direction of the loom main body 12 which is in a stopped state, and therefore all the warp threads 2 are loosened, and all the dancing levers 14 are rearwarded at the same time and come into contact with the stopper 23. At that time, even if the individual dancing levers 14 are unevenly tilted forward or backward as described above, if they come into contact with the stopper 23, the warp threads 2 will lose tension, and the feed roller The contact friction force with the feed loaf 9 is eliminated, and even if the feed loaf 9 continues forward rotation, it will not be fed any more and will hardly loosen. This allows all dancing levers 14
The warp threads 2 come into contact with the stopper 23 and are aligned at the expulsion limit state, and all the warp threads 2 are aligned with almost no tension or slack. At this time, since the slack absorbing device 8 is rotatable by the one-way clutch 32 as described above, it does not affect its own operation at all. Next, the torque motor 29 rotates in the reverse direction, forcing the feed roller 9 to rotate in the opposite direction to the direction in which the warp yarns 2 are supplied, and in conjunction with this, the two tensioning rollers 8a and 8b of the slack absorbing device 8.
rotates counterclockwise around the shaft 27 as shown by the broken line arrow in FIG.

Then, all the warp threads 2 are pulled back by the feed roller 9 and tensioned between the feed roller 9 and the loom main body 12, and all the dancing levers 14 are tilted forward in one stroke. At the same time, all the warp threads 2 are pulled back by the feed roller 9
However, as the two tensioning rollers 8a and 8b rotate, all the warp threads 2 are pulled into an S-shape as shown by the imaginary lines in FIG. As you go, it will be absorbed. In this way, when the reverse rotation of the feed roller 9 due to the reverse rotation of the torque motor 29 and the rotation of the slack absorbing device 8 are continued for a suitable period of time, the dancing lever 14 reaches the central state shown by the solid line in FIG. When the weaving is stopped, all the warp yarns 2 are uniformly aligned with a certain appropriate tension, which is a suitable condition for weaving. When the loom main body 12 starts operating next time, the feed roller 9 rotates forward and all the dancing levers 1
4 operates smoothly, all the warp threads 2 are supplied to the loom main body 12 with a constant and appropriate tension, and smooth weaving is performed. At this time, the two tensioning rollers 8a and 8b of the slack absorbing device 8 are rotatable independently of the forward rotation of the feed roller 9, and all the warp yarns 2 have a dropper 05 before the feed roller 9. Since tension is generated due to frictional resistance in other parts, the tension causes the two tensioning rollers 8a and 8b to
The warp threads 2 are automatically rotated back clockwise around the shaft 27 until all the warp threads are almost in a straight line as shown by the solid line in Fig. 1. The clock is ready to rotate in all directions. As described above, according to this device, the uneven tension of the warp yarns during weaving is automatically and effectively corrected to a uniform tension when the loom main body is temporarily stopped, and the loom main body is replaced with cup replacement. Because the loom is necessarily stopped frequently at predetermined intervals for reasons such as this, the loom is stopped each time, and combined with the action of the dancing lever, the loom always maintains a constant and appropriate tension on all the warp threads. It can be supplied to the main body, allowing smooth and efficient weaving and producing high quality woven products.

Note that such a warp alignment action occurs not only when the loom body is inevitably stopped temporarily, but also at any time when the warp tension becomes suddenly uneven for some reason during weaving. Of course, this can be done by simply stopping the loom temporarily, and this can be automated by having the dancing lever 14 and its stoppers 22, 23 function as a switch to stop the operation of the loom body when they come into contact with each other.

Furthermore, when the loom main body is stopped, the rotation of the feed roller 9 from normal rotation to reverse rotation by the torque motor 29 and the setting of the continuous rotation time can be appropriately and automatically performed using a time switch.

It is of course preferable that the slack absorbing device 8 be able to completely absorb the slack in the warp due to the reverse rotation of the feed roller 9, but this is dependent on the outer dimensions of the two tensioning rollers 8a and 8b. It can be adjusted by appropriately selecting the spacing and the number of teeth of the sprocket wheels 28, 30, 33.

As is clear from the description of the embodiments above, the device of the present invention allows a large number of warp threads to come into uniform detour contact one after the other during the supply path of the large number of warp threads from the warp supply source to the dancing lever of the loom main body. A slack absorbing device consisting of a feed roller and a tensioning roller having an appropriate surface friction force is provided, and when the weaving operation of the loom main body is temporarily stopped, the feed roller is temporarily rotated forward in the warp supply direction by a rotation drive means, and then the warp is The one-day dancing levers are rotated in the opposite direction to the feeding direction to reach the frequency angle limit of the back frame, and then returned to the neutral position of the angle limit of the front and back feeds, and when the feed roller rotates in the reverse direction, it moves and loosens. Since the absorbing device is designed to rotate in the direction of absorbing the slack in the warp threads, the operation of the feed roller and the slack absorbing device prevents the loom from temporarily shutting down when the loom inevitably stops due to changing threads. Each time the loom is stopped, the uneven warp tension that occurs during the operation of the loom body is automatically and effectively corrected to make it uniform, reducing the time and effort required in the past for such alignment correction. This makes it possible to constantly supply all the warp yarns uniformly with good tension to the loom body without incurring a large loss in efficiency, and therefore the weaving work can be carried out efficiently and smoothly, resulting in high quality woven fabrics. This method has an excellent effect in that a finished product can be obtained.

Note that the device of the present invention is of course applicable not only to the creel method but also to the case of warp supply using the beam method.

[Brief explanation of the drawing]

Fig. 1 is a schematic mechanical diagram showing an embodiment of the device of the present invention, Fig. 2 is an enlarged side view of the dancing lever in Fig. 1, and Fig. 3 is an enlarged side view of the dancing lever in Fig. 1.
The figure is an enlarged perspective view of the main parts of FIG. 1, namely the feed roller and the slack absorbing device. 1...Package, 8...Sag absorption device,
8a, 8b...Tensioning roller, 9...Feed roller, 12...Loom body, 14...Dancing lever, 18...Woven fabric, 24... Frame, 28, 30, 33... sprocket wheel,
29...Torque motor, 31...Chain, 32...One-way clutch, 2...Warp thread. Figure 2 Figure 3 *Figure 1

Claims (1)

[Claims] 1. The dancing lever 14, which has a warp guide hole 20 and has a tilting angle limit of forward and backward tilting and is biased by a spring 21 in a backward direction that applies tension to the warp threads passing through the guide hole 20, is attached to one warp thread per warp thread. Arranged around the circular loom main body 12 in proportion,
A large number of warp threads 2 from a warp supply source are supplied one by one to the loom main body 12 through the guide hole 20 of the dancing lever 14, and the large number of warp threads 2 are supplied from the warp supply source to the dancing lever 14. A warp feed roller 9 having an appropriate surface friction force that allows a large number of warp threads 2 to uniformly contact each other in a detour is disposed in the path, and the feed roller 9 is used to temporarily move the warp threads 2 when the weaving operation of the loom main body 12 is temporarily stopped. Feed roller forward/reverse rotation drive means 28, 29, 30, 31 are provided for rotating forward in the supply direction and then reversely rotated in the opposite direction, and further before the feed roller 9 in the supply path of the large number of warps 2. A warp slack absorbing device 8 consisting of tensioning rollers 8a and 8b is provided at a position on the warp supply source side,
Means 32 and 33 are provided for rotating the slack absorbing device 8 in a direction to absorb slack in the warp threads 2 in conjunction with the drive means 28, 29, 30, and 31 when the feed roller 9 rotates in reverse. Features: Warp thread alignment device for circular looms.