JP2798734B2 - Method and apparatus for refilling weft yarn in circular loom - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an annular loom for weaving a seamless tubular woven fabric, and for replenishing the weft yarn in the rotary shuttle when the weft yarn is consumed. The present invention relates to a method and an apparatus.

2. Description of the Related Art An outline of a conventional general circular loom will be described with reference to FIGS. Reference numeral 1 denotes a frame of an annular loom, on which a large number of warp yarns 2 are radially arranged, and a weaving opening 3 is formed in the center of the frame. Or it is taken down. Further, a heald 5 is provided outside the frame 1, and the heald 5 causes the warp yarn 2 to move upward and downward to form an opening 6 of the warp yarn 2.

Reference numeral 7 denotes a rotary shuttle, which is an opening 6 of the warp yarn 2.
And is rotatable about the tubular woven fabric 4 along the frame 1.

In the rotary shuttle 7, the weft bobbin 9 is rotatably supported by the rotary shuttle body 8, and the arms 10, 11 project from both ends of the rotary shuttle body 8,
Sectors 12 forming the weaving opening 3 of the tubular woven fabric 4 are attached to the distal ends of the arms 10 and 11.

In the circular loom, the heald 5 moves up and down to cause the warp yarn 2 to open, and the position of the opening 6 is sequentially moved along the frame 1. Then, the rotary shuttle 7 is positioned in the opening 6, and the rotary shuttle 7 is pushed by the driving means provided in the frame 1, and the rotary shuttle 7 is rotated along the frame 1 with the movement of the opening 6. Rotary shuttle 7
The weft yarn 13 fed from the weft bobbin 9 is supplied to the weaving opening 3, pushed into the weaving opening 3 in the sector 12, and
Is organized.

And two groups of warp yarns and weft yarns spirally woven into them
13, the tubular woven fabric 4 is woven, and the tubular woven fabric 4 is pulled upward or downward.

Problems to be Solved by the Invention However, in this type of circular loom, the rotary shuttle 7 is located in the opening 6 of the warp yarn 2, the upper and lower portions of which are covered by the warp yarn 2 group, and the outer periphery is surrounded by the heald 5. I have. Therefore, it is extremely difficult to replace the weft bobbin 9 when the weft 13 wound around the weft bobbin 9 is consumed due to weaving.

In a normal loom, the warp group is arranged parallel to the length direction of the fabric, and the shuttle reciprocates in the direction intersecting with the weft group to weave the weft yarn. Therefore, every time one weft is woven, the shuttle comes out from the warp group to the side, and when the weft is consumed, the shuttle or the weft bobbin in the shuttle can be easily replaced at that position. In recent years, a shuttle changing device that replaces a shuttle with a new bobbin on the side of the warp yarn group without stopping the operation of the loom when the weft yarn is consumed has been put into practical use.

However, in the circular loom, as described above, the rotary shuttle 7 rotates around in the enclosed space covered by the warp 2 and the heald 5, so that the rotary shuttle 7 may come out of the enclosed space. It is not easy to change the shut or bobbin.

Conventionally, when the weft yarn 13 has been consumed, the operation of the annular loom is stopped when the weft yarn 13 is detected, and the warp yarn around the rotary shuttle is squeezed and moved to the side. Replace with the weft bobbin 9 of the pipe,
It is common to connect and refill weft threads.

However, in this method, in order to replace the weft bobbin 9, as described above, the warp yarn 2 around the bobbin 9 is separated and
It is necessary to form a gap large enough to move the weft bobbin 9 in and out of the side. For this reason, after replacing the weft bobbin 9, the warp yarn 2 moved to the side is loosened, and the tension is completely lost.

Generally, as in the case of looms, the warp tension must be constant for all warp yarns. If the warp yarn tension is incorrect for each individual warp yarn, distortion occurs in the woven fabric, resulting in unsightly appearance and poor performance such as strength.

The same applies to the circular loom, and the tension must be constant for all the warp yarns constituting the tubular woven fabric 4. For this reason, the individual warp yarns are supplied with their tensions being adjusted through a tension adjusting device and adjusted to a constant tension. The tension that was being adjusted would go crazy.

Therefore, after replacing the weft yarn bobbin 9, all the warp yarns 2 must be loosened, the tension adjusted again, the tension adjusting device adjusted again to return to normal, and then the operation of the circular loom must be resumed. No. The above-described operation of replacing the weft bobbin 9 itself is not a difficult task, but can be easily performed in a short time. However, the subsequent adjustment of the warp yarn 2 requires a great deal of labor and time. It was.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method and an apparatus capable of easily and quickly refilling the weft yarn 13 when the weft yarn 13 in the weft bobbin 9 is exhausted. Is what you do.

Means for Solving the Problems Thus, the method of the present invention comprises the steps of detecting the consumption of the weft yarn in the weft bobbin in the rotary shuttle of the circular loom, and stopping the rotation of the rotary shuttle at a predetermined position based on the signal. At the stop position of the rotary shuttle, drawing out the weft between the weft bobbin in the rotary shuttle and the weaving opening of the tubular woven fabric through the warp yarns, and cutting the weft yarn at the drawn-out portion; Connecting a new weft to the end of the weft bobbin on the weft bobbin side, rotating the weft bobbin in the rotary shuttle by an external operation, and reciprocating the traverser in parallel with the weft bobbin; After the new weft is wound around the bobbin, a desired amount of the new weft is wound around the weft bobbin. Cutting the new weft yarn and connecting the end of the weft opening side of the cut weft yarn to the end of the weft yarn on the weft bobbin side.

The apparatus of the present invention also includes a rotary shuttle main body that rotates in an opening of a radially arranged warp group in a circular loom, and a weft supported rotatably by the rotary shuttle main body and rotatably driven by an external operation. A bobbin, a traverser which can reciprocate in parallel with the weft bobbin and is driven by an external operation, and supported by a rotary shuttle body between the traverser and a weaving opening of the annular loom, regardless of the position of the traverser Guide means for holding the weft thread in a fixed position, weft thread consumption detection means for detecting consumption of the weft thread wound around the weft bobbin, and rotation of the rotary shuttle body at the fixed position based on a signal from the weft thread consumption detection means. Rotation control means for stopping, drawer means for drawing the weft thread of the guide means to the outside, and said drawer By cutting the weft yarn drawn by means in which the more the connecting means for connecting the new weft.

An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a main part of the apparatus of the present invention, in which supporting members 14 and 15 are attached to a rotary shuttle body 8, and the weft bobbins 9 are attached to the supporting members 14 and 15. It is rotatably supported.

One support member 14 has a casing 16, and a pair of spiral gears 1 meshing with each other in the casing 16.
7,18 are provided. When the weft bobbin 9 is connected, the rotation shaft 19 of the weft bobbin 9 is connected to one of the spiral gears 17 and integrally rotates, and the other spiral gear 18 has a drive shaft insertion hole 20 formed therein.
The weft bobbin 9 can be freely rotated at all times with respect to the support members 14 and 15, and a drive shaft 31 is inserted into the drive shaft insertion hole 20 from outside, and the weft bobbin 9 is rotated. It can be driven to rotate.

Sprockets 22, 23 are attached to the support members 14, 15, and a chain 24 is stretched between the sprockets 22, 23. A weft protection cover 21 is attached to the support members 14 and 15 so as to cover the upper part of the chain 24 on the center 12 side. One sprocket 22 is provided with a drive shaft insertion hole 25, and
24 has a driver sir 26 attached. And insert the drive shaft 32 into the drive shaft insertion hole 25,
By rotating this, the chain 24 is rotationally driven,
The driver sir 26 is reciprocated.

A center member 27 is attached to the distal ends of the arms 10 and 11, and the center 12 is attached to the center member 27. A guide member is provided on the center member 27 so as to face the weft bobbin 9.
28 are installed. The guide member 28 has a pair of facing plates 29, 30 facing each other.

The weft bobbin 9 is located above the circular loom.
A weft thread consumption detecting means 33 for detecting the consumption of the weft thread 13 wound around the drive shaft and the drive shafts 31 and 32 are provided. Reference numeral 34 denotes a drawing means for drawing the weft yarn 13 between the eyelets 29 and 30 of the guide member 28 to the outside, and reference numeral 35 cuts the weft yarn 13 drawn by the drawing means 34 and connects it to a new weft yarn 13 '. It is a yarn joining means. 36 is a bobbin wound with a new weft thread 13 '.

As the weft thread consumption detecting means 33, for example, a light emitting / receiving photoelectric tube can be used. A light reflecting tape is attached to a part of the weft bobbin 9, and the weft 13 is wound thereon. Then, the light from the photoelectric tube is projected toward the tape, and the reflected light is detected. While the weft thread 13 is wound, the photoelectric tube does not sense the reflected light, but when the weft thread 13 is consumed, the reflection tape is exposed, and the consumption of the weft thread 13 is detected by sensing the reflected light by the reflection tape. is there.

As the drive shafts 31 and 32, appropriate ones can be used depending on the shape and structure of the drive shaft insertion holes 20 and 25.

Further, as the pull-out means 34, an appropriate hook which can hook the weft 13 of the guide member 28 and pull it upward can be used.

As the yarn connecting means 35, for example, a yarn connecting device such as an air splice that entangles the fibers by an air flow is commercially available, and an appropriate one may be used among them.

The drive mechanism of the circular loom incorporates rotation control means for stopping the rotation of the rotary shuttle 7 at a fixed position based on a signal from the weft thread consumption detection means 33.

Operation Next, the operation of this device will be described. A weft thread 13 is wound around the weft thread bobbin 9 in the rotary shuttle 7. The weft thread 13 passes through the traverser 26, passes through the eyelets 29, 30 in the guide member 28, and is pushed into the weaving opening 3 in the sector 12. It is woven into the tubular woven fabric 4.

Then, the rotary shuttle 7 rotates around the cylindrical woven fabric 4, and the warp yarn 2 performs an opening motion in accordance with the rotation, and the warp yarn 2 and the weft yarn 13 weave the tubular woven fabric 4.

As the weaving of the tubular woven fabric 4, the weft 13 is drawn out from the weft bobbin 9 and is consumed. At this time, the spiral gears 17 and 18 can rotate freely with respect to the rotation of the weft bobbin 9, and an obstacle is generated. No. Then, when the amount of the weft thread 13 wound around the weft thread bobbin 9 decreases and the remaining amount decreases, the weft thread consumption detecting means 33 detects this. When the weft consumption detecting means 33 is the above-described photoelectric tube, when the weft 13 is wound around the weft bobbin 9 in a large amount, the reflection tape is hidden by the weft 13 and does not reflect light from the photoelectric tube. When worn, the reflective tape is exposed and reflects light from the phototube, which is detected by the phototube and the weft
Detects 13 wear.

The rotation control means incorporated in the drive mechanism of the circular loom is activated based on the signal from the weft thread consumption detecting means 33, and the rotation of the rotary shuttle 7 is stopped at a predetermined position.

Therefore, first, the pull-out means 34 is inserted from between the warp yarns 2, and the weft yarn 13 exposed between the eye yarn 29 and the eye yarn 30 in the guide member 28 is hooked up. Pull out outside. At this time, the length of the weft yarn 13 drawn out by the drawer means 34 is fed out from the weft bobbin 2 and supplied.

Next, the drawn weft yarn 13 is cut by the yarn connecting means 35, and the terminal of the new weft yarn 13 'is connected to the terminal of the weft yarn bobbin 9 side. The end of the cut weft yarn 13 on the weave opening 3 side is held by appropriate means.

After that, the drive shaft 31 and the drive shaft 32
Into the space between the warp yarns 2 and the spiral gears 18
And inserted into the drive shaft insertion holes 20 and 25 of the sprocket 22 and rotated. When the drive shaft 31 is inserted into the drive shaft insertion hole 20 and rotated, the spiral gear 18 is rotated, and the rotation is transmitted to the spiral gear 17, and the weft bobbin 9 is rotated via the rotation shaft 19, and the weft yarn is rotated. The weft thread 13 is wound around the bobbin 9. Further, by inserting the drive shaft 32 into the drive shaft insertion hole 25 and rotating it, the sprocket 22 rotates to drive the chain 24, and the traverser 26 moves right and left in FIG. Then, the rotation direction of the driver shaft 32 is appropriately reversed, and the traverser 26 is moved to the flange 37 of the weft bobbin 9.
They reciprocate between them.

Then, the new weft thread 13 'is pulled by the connected weft thread 13 and is driven out of the bobbin 36, and the eye panel 29 and the traverser 26
The weft is wound around the bobbin 9. The winding position is moved right and left by the traverser 26, and a new weft yarn 13 'is wound evenly over the entire length of the yarn bobbin 9.

When the desired amount of new weft thread 13 'is wound around the weft thread bobbin 9, the rotation of the drive shafts 31, 32 is stopped.
Then, the new weft yarn 13 'is cut again by the yarn connecting means 35, and the weft yarn 13 on the weaving opening 3 side is connected to the terminal thereof.

Thereafter, the drawn-out portion of the weft yarn 13 is wound around the weft bobbin 9, and the drive shafts 31, 32 are pulled out from between the warp yarns 2. Thus, the refilling of the weft yarn 13 is completed. Then, when the driving of the circular loom is resumed, the warp 2 and the refilled new weft 1
3 'and the tubular woven fabric 4 are woven.

In the above description, the drive of the weft bobbin 9 and the driver 26 at the time of refilling the weft 13 is performed by the drive shafts 31 and 32 inserted into the drive shaft insertion holes 20 and 25, but other means may be used. . For example, a drive motor may be coupled to the rotating shaft 19 and the sprocket 22, and the drive motor may be driven by supplying power from a cord inserted from the outside. Further, a power supply battery can be connected to the drive motor, and the switch can be operated and stopped by operating a switch by appropriate means inserted from the outside.

According to the present invention, it is not necessary to put the large weft bobbin 9 in and out in order to replenish the consumed weft 13.
Therefore, there is no need to greatly expand the warp yarn 2 and bring it sideways.
As a result, the tension of the warp yarn 2 is not disturbed.

In order to refill the weft thread 13, the thread that enters and exits the opening 6 of the warp thread 2 from outside is filled with the weft thread 13 of the guide member 28.
And a drive operating means such as drive shafts 31 and 32 for driving the weft bobbin 9 and the traverser 26. These members are small and can be easily inserted between the warp yarns 2 left radially. The warp yarn 2 can be moved in and out without affecting the warp yarn 2 tension.

In the present invention, the time required for winding the weft 13 on the weft bobbin 9 is considerably longer than the time required for replacing the weft bobbin 9 with a full weft bobbin in the conventional method. However, since the warp yarn 2 is not disturbed and the tension is not disturbed when the weft yarn 13 is replenished, the operation of the circular loom can be resumed immediately after the replenishment.

Therefore, it is not necessary to readjust the tension of the warp yarn 2 after refilling the weft yarn 13, and no time is required for that. Therefore, the time for refilling the weft yarn 13 is short as a whole, and the tubular woven fabric 4 can be woven very efficiently.

Further, the apparatus of the present invention can be operated fully automatically, and the weft 13 can be replenished unattended.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part of the device of the present invention, and showing a part of the device in cross section. FIG. 2 is a central longitudinal sectional view of a main part of the device of the present invention. FIG. 3 is a plan view of the annular loom, and FIG. 4 is a central longitudinal sectional view thereof. 2 ... warp yarn 3 ... weaving mouth 4 ... cylindrical woven fabric 6 opening ... 7 rotating shuttle 8 ... rotating shuttle body 9 ... weft bobbin 13, 13 ... weft 13 '... new Weft thread, 14 support member 26 traverser, 28 guide means 33 weft consumption detection means 34 pull-out means 35 thread connecting means

Claims (2)

(57) [Claims] 1. A weft thread (13) in a weft bobbin (9) in a rotary shuttle (7) of a circular loom is detected, and
Stopping the rotation of the rotary shuttle (7) based on the signal; and, at the stop position of the rotary shuttle (7), the weft bobbin (9) in the rotary shuttle (7).
Weft yarn (13) between the weaving opening (3) of the tubular woven fabric (4)
A weft thread (13 ') at the end of the cut weft thread (13) on the side of the weft bobbin (9), and a new weft thread (13'). ), The weft bobbin (9) in the rotary shuttle (7) is rotated by an external operation, and the traverser (26) is reciprocated in parallel with the weft bobbin (9). (9) winding the new weft yarn (13 ');
The weft bobbin (9) is filled with a desired amount of a new weft (1
3 '), the new weft (13') is cut, and the weft (13) weaving opening (13) is cut at the end of the new weft (13 ') on the weft bobbin (9). 3) A method for refilling the weft of the circular loom, comprising the step of connecting the terminals on the side 2. A rotary shuttle main body (8) rotating in an opening (6) of a group of warp yarns (2) arranged radially in an annular loom, and a rotary shuttle main body (8) rotatably and externally provided. A weft bobbin (9) instructed to be rotatably driven by an operation, a traverser (26) that can reciprocate in parallel with the weft bobbin (9), and is driven by an external operation, and the traverser (2)
A guide means (28) supported by the rotary shuttle body (8) between the weaving opening (3) of the circular loom and the weft (13) in a fixed position regardless of the position of the traverser (26); A weft thread consumption detecting means (33) for detecting the consumption of the weft thread (13) wound on the weft thread bobbin (9);
A rotation control means for stopping the rotation of the rotary shuttle body (8) at a fixed position based on a signal from the weft thread consumption detection means (33), and a withdrawing means (25) for drawing out the weft (13) of the guide means (28) to the outside. A weft replenishing device for an annular loom, comprising: a weaving thread (13) cut out by the pulling-out means (34);