JPH031502Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a circular loom for weaving tubular woven fabrics such as fire hose jackets. The present invention relates to a device that actively feeds the circular loom while keeping it constant.

BACKGROUND ART Conventionally, as a warp feeding device for this type of circular loom, the one described in Japanese Utility Model Publication No. 55-55270 is known. As shown in Fig. 3, this device divides all the warp threads 2 supplied to the circular loom 1 into two to four groups, and feeds the warp threads 2 in each warp thread group 3, 3 in parallel to the horizontal direction. Warp group 3
Two guide rollers 4 and 5 are disposed in parallel at the bottom of the guide rollers 4 and 5, and a tension roller 6 supported by the warp group 3 is provided between the guide rollers 4 and 5, and the tension of the warp group 3 is When the tension roller 6 moves up and down due to fluctuations, its position is detected via the detection lever 7 and the operating rod 8, the rotational speed of the motor 9 is changed, the rotational speed of the feed-out roller group 10 is adjusted, and the warp yarn group 3 , 3 are always actively supplied to the circular loom with constant tension.

Problems to be Solved by the Invention However, this device requires one set of feed roller groups 10 and one tension detection mechanism for each warp yarn group 3, making the structure complex and each tension detection mechanism detecting If the magnitude of the tension differs slightly, the tension of the warp yarns 2 cannot be made uniform throughout.

Also, for each warp group 3, there is a feed roller group 10.
and a tension detection mechanism is required, so warp group 3
The number of groups cannot be increased excessively, and the maximum number of groups is about four. Therefore, each warp thread group 3 is supplied with warp threads 2 arranged in parallel and horizontally, and these warp threads 2 enter the circular loom 1 in a circular manner, so that the warp threads in the center of the warp thread group 3 2 and the warp yarns 2 at both edges have different lengths of paths to travel, so the tension of the warp yarns 2 at the center and at both edges varies, causing uneven weaving, and in extreme cases. Sometimes the warp threads break. Particularly when weaving fire hose jackets, etc., the jacket bears a high degree of pressure resistance, so if uneven weaving occurs like this, there is a high risk that the pressure resistance of the fire hose will decrease. .

If the number of warp yarn groups 3 is increased and the number of warp yarns 2 shared by one warp yarn group 3 is decreased, this problem will not occur, but if a large number of feeding roller groups 10 and tension detection mechanisms having a complicated structure are provided. This is undesirable because the structure of the entire device becomes more complicated and it becomes difficult to make the tension of each warp yarn group 3 uniform.

Furthermore, in the above invention, since each warp thread group 3 has warp threads 2 arranged in parallel and runs horizontally, it also has the disadvantage that it requires a very large space.

The present invention was devised in view of the above circumstances, and has a compact overall structure and a simple structure.Moreover, the warp threads can be actively fed to the circular loom with a constant tension, thereby preventing uneven weaving. The purpose of this invention is to provide an active feeding device that does not require a

Means for Solving the Problems The present invention provides an apparatus for actively supplying warp yarns supplied from a creel to a circular loom.
A plurality of feed rollers are arranged in an annular manner at the lower part of the outer circumference of the circular loom, and the group of feed rollers are connected in an annular manner by a universal joint so as to rotate integrally at a constant speed, and the group of feed rollers is connected by a motor. first and second guide rollers are provided in proximity to each feed roller, and the warp fed from the creel is directed to the first guide roller,
The warp threads are passed around a feed roller and a second guide roller and then supplied to a circular loom, so that the warp yarns are actively fed by the rotation of the feed roller, and a second warp yarn attached to the first feed roller in the group of feed rollers is fed. A detection roller capable of swinging toward and away from the feed roller is provided in place of the guide roller,
The average tension of the warp yarns wound around the one feed roller group is detected from the swinging position of the detection roller, and the rotational speed of the motor is controlled based on the value of the tension, and the warp yarns wound around the one feed roller group are detected. The present invention is characterized in that the warp threads are actively supplied to the circular loom while the tension of the warp threads is kept constant.

The present invention will be explained below with reference to the drawings. In the drawings, reference numeral 1 denotes a circular loom, in which warp yarns 2 fed from the periphery toward the center are opened by healds 11, and within the openings a shuttle 12 rotates and runs in a circular shape.
The warp yarns 2 and the weft yarns supplied from the shuttle 12 are used to weave a cylindrical woven fabric 13.

A plurality of (eight in the example of the drawings) feed rollers 14 are arranged in an annular manner at the lower part of the outer periphery of the circular loom 1, and each feed roller 14 is connected to each other via a universal joint 15, so that the entire feed The rollers 14 are integrally rotated at a constant speed. The group of feed rollers 14 is rotationally driven by a motor 16. It should be noted that all the feed rollers 14 may be connected in a complete annular manner by the universal joint 15, but it is necessary to increase the machining accuracy of the device, and the power transmission loss will be large. It is preferable to omit one universal joint 15 as shown in FIG.

First and second guide rollers 17 and 18 are arranged below each feed roller 14,
The warp yarns 2 are wound around from the first guide roller 17 via the feed roller 14 to the second guide roller 18, and are raised from the second guide roller 18 and supplied to the circular loom 1 via the guide 19. It's summery.

One of the feed rollers 14 in the group of feed rollers 14 is provided with a detection roller 20 in place of the second guide roller 18 attached to the feed roller 14 . The detection roller 20 is
It is attached to the tip of an arm 22 that is rotatably provided around the shaft 21 as a rotation axis, and can swing in the direction toward and away from the feed roller 14 as the arm 22 rotates. Further, the arm 22 is attached to one end of the shaft 21.
A gear 23 is provided which rotates integrally with the
The gear 23 meshes with a gear 25 attached to the shaft of a potentiometer 24. The potentiometer 24 detects the rotation angle of the gear 25 and converts it into an electrical signal to adjust the rotation speed of the motor 16. 26 is a weight that adjusts the amount of tension applied to the warp threads 2.

Function In the present invention, the warp yarns 2 are wound from the first guide roller 17 through the feed roller 14 to the second guide roller 18 as described above, rise from there, and pass through the guide 19 to the circular loom 1. It is fed and woven with the weft yarn fed from the shuttle 12 to form a woven fabric 13.

Therefore, the detection roller 20 is
0 swings according to the tension of the two groups of warp threads wound around the accompanying feed roller 14, and the swing position changes according to the average value of the tension of the individual warp threads 2 of the two groups of warp threads. Become.

When the tension of the warp yarns 2 increases, the detection roller 20 is pulled up by the tension of the warp yarns 2, and the arm 22 rotates counterclockwise in the figure around the shaft 21, and the gear 23 rotates in the same direction. The gear 25 meshed with the gear 23 rotates clockwise. The rotation angle of the gear 25 is detected by the potentiometer 24, and the rotation speed of the motor 16 is increased based on the signal. As a result, the rotational speed of each feed roller 14 becomes faster, the feeding speed of the warp threads 2 increases, and the tension of the warp threads 2 is relaxed.

Conversely, when the tension of the warp threads 2 decreases, the detection roller 20 descends due to the load of the weight 26, the arm 22 rotates clockwise, and the gear 23 rotates in the same direction. The meshed gears 25 rotate counterclockwise. The potentiometer 24 detects the rotation angle of the gear 25, transmits the signal to the motor 16, and slows down the rotation speed of the motor 16. As a result, the rotation speed of each feed roller 14 is reduced, the feed speed of the warp threads 2 is reduced, and the tension of the warp threads 2 is increased.

Effects of the invention According to the invention, a plurality of feed rollers 14 are arranged in a ring shape, and these are connected to a universal joint 15.
The warp yarns 2 are connected so as to rotate at the same speed as one body, and are driven by a single motor 16, so that all the warp yarns 2 are sent at the same speed and supplied to the circular loom 1. Unlike the conventional example, there is no slight difference in feed speed between warp yarn groups.

In addition, in the present invention, a plurality of feed rollers 1
Warp yarn 2 feeding mechanism 17, 14, 1 attached to 4
8 is replaced with tension detection mechanisms 17, 14, and 20 while maintaining the same structure, the structure is simple, and the tension of the warp threads 2 detected by one tension detection mechanism is Since the supply speed of all warp threads 2 is adjusted based on the above, the warp thread feeding mechanism 17,
The number of 14, 20 can be increased. Therefore, the number of warp yarns 2 shared by a single warp yarn feeding mechanism 17, 14, 18 is small, and the width of the supply is also small, so that the central part and both edges within one group of warp yarns 2 are small. There is no large difference in the tension of the warp yarns 2, and the cylindrical woven fabric 1 has a uniform tension.
3 can be woven. Therefore, this woven fabric 13
Even when used in the jacket of a fire hose, it is possible to prevent a decrease in pressure resistance due to uneven tension.

Furthermore, in the present invention, since the warp thread 2 feeding mechanism and tension detection mechanism are arranged in an annular manner at the lower part of the outer periphery of the circular loom 1, the warp threads extend over a long distance to the side of the circular loom 1 as in the conventional example. There is no need to move the second group horizontally, the circular loom 1 can be assembled extremely compactly, and an unnecessarily large space is not required, and the tension of each warp yarn 2 up to the first guide roller 17 can be Since the influence caused by this is eliminated by being actively fed by the feed rollers 14, the position of the creel and the route of the warp yarns 2 can be freely set, resulting in a large space-saving effect.

[Brief explanation of drawings]

FIG. 1 is a central vertical sectional view of a circular loom to which the present invention is applied. FIG. 2 is a perspective view of the device of the present invention. FIG. 3 is a perspective view of a conventional device. 1... Circular loom, 2... Warp, 14... Feed roller, 15... Universal joint, 1
6...Motor, 17...First guide roller, 18...Second guide roller, 20...Detection roller.

Claims (1)

[Scope of utility model registration request] The warp yarn 2 supplied from the creel is transferred to the circular loom 1.
In this device, a plurality of feed rollers 14 are arranged in an annular manner at the lower part of the outer periphery of the annular loom 1, and the group of feed rollers 14 are integrally rotated at a constant speed by a universal joint 15. The feed roller 14 is connected in an annular manner and
The group is driven by a motor 16, and each feed roller 14
first and second guide rollers 17,
18 is provided, and the warp yarn 2 supplied from the creel is passed through the first guide roller 17 and the feed roller 1.
4 and the second guide roller 18, the warp yarns 2 are fed to the annular loom 1, and the warp yarns 2 are actively fed by the rotation of the feed roller 14, and the warp yarns 2 are fed to the first feed roller 14 in the group of feed rollers 14. In place of the accompanying second guide roller 18, a detection roller 20 is provided which is swingable in a direction towards and away from the feed roller 14, and is wound around the first feed roller 14 from the swinging position of the detection roller 20. detecting the average tension of the two groups of warp yarns, and controlling the rotation speed of the motor 16 based on the value of the tension;
Warp threads 2 wrapped around the feed rollers 14 group
An active warp supply device for a circular loom, characterized in that the warp yarns 2 are actively supplied to the circular loom 1 while maintaining the tension of the group constant.