JPH0711191Y2 - Yarn end treatment device for shuttleless loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a yarn end treating device in a shuttleless loom.

<< Prior Art and Problems Therewith >> As a yarn end treating device in a shuttleless loom, there is, for example, a type disclosed in Japanese Patent Publication No. 52-39946.
In this device, the weft end of the weft yarn, which is inserted from the weave end of the weft yarn inserted by a fork rod that swings together with the sley, is delivered between the pair of upper and lower flat belts stretched between a pair of rollers on the non-feeding side. , The flat belts are continuously gripped by their contact surfaces to apply tension for a predetermined time.

However, in this type of device, since the weft yarn is held by the contact surfaces of the pair of belts, the holding length and the holding force cannot be adjusted. In addition, a fork rod for passing the weft yarn between the belts is required, and the mechanism is inevitably complicated, which lacks high-speed followability.

In addition, as another one of the yarn end processing devices, Japanese Patent Publication No. 57-387
There is a type disclosed in Japanese Patent Publication No. 02. In this device, a belt, which is stretched by a pair of rollers on the side opposite to the yarn feeding side and has a transporting action in the cloth winding direction, and a nipping body made of a plate-like elastic body that comes into contact with the belt, are attached to the upper part of the reed. Push the weft end that has been inserted with the pushing piece,
It is arranged to be pulled while being held between the transfer body and the holding body.

Even in this type of device, since the weft yarn is held between the transfer body and the holding body, the holding length and the holding force cannot be adjusted. Moreover, since this device also requires a push-in piece, it has a drawback that it is mechanically complicated as in the prior art.

Still another conventional technique is the type disclosed in Japanese Patent Laid-Open No. 58-46184. The device disclosed herein is on the yarn feeding side and holds a weft yarn inserted by a cooperation of a movable clamp element (disc) and a stationary clamp element which can move in the direction of the repulsion movement during the repulsion movement. I am trying to do it.

In this conventional technique, the gripping force can be adjusted for a while, but since the weft yarn is gripped by the cooperation of the movable clamp element and the stationary clamp element, the gripping length cannot be changed and adjusted. Wefts and woven fabrics with different weft insertion densities cannot be supported, ear loosening cannot be effectively prevented, and high-quality woven fabrics cannot be obtained.

<Object of the Invention> The present invention was proposed in view of the above-mentioned drawbacks of the prior art. The gripping length (gripping time) of the weft can be changed, and the gripping force can be adjusted. It is an object of the present invention to provide a yarn end treating device in a shuttleless loom that can reliably prevent loosening of ears even with other weft yarns and fabrics having different weft insertion densities.

<< Basic Configuration of the Invention >> The present invention relates to a first rotating body that is driven and rotated in the cloth winding direction in the vicinity of a woven fabric edge, and is wound by contacting the first rotating body via an elastic body. A second rotating body that rotates following the take-up direction, the contact portion is provided on the weaving cloth extension line, and a biasing force adjusting mechanism for adjusting the contact degree of the contact portion is provided in the first or second rotation. It will be provided on one of the body.

<< First Embodiment and Its Function >> The first embodiment is a basic embodiment and is shown in FIGS. 1 and 2. In FIG. 1, reference numeral 1 denotes a bracket attached to a predetermined position of the woven cloth CL end side of a frame of a loom not shown. An arm 3 is attached from the bracket 1 so as to be swingable about a mounting portion 5 in the winding direction of the woven cloth CL. A rotary roller 8 is rotatably attached to the tip of the arm 3 so as to urge and contact a winding guide roll 7 that sends the woven cloth CL in the winding direction. Rotating roller 8
A first pulley 6 that rotates based on the rotation of the rotating roller 8 is integrally provided on one side surface of the first pulley 6. 9 in the figure
Is a spring for biasing the rotating roller 8 into contact with the guide roll 7.

The bracket 1 is provided on the front side (back side of the loom) of the bracket 1.
A rotary shaft 11 is attached which extends in the weft direction. A second pulley 13 paired with the first pulley 6 is attached to one end of the rotary shaft 11. A belt 10 as a rotation transmission means is stretched between the pulleys 6 and 13.

Similarly, a third pulley 15 is attached to the other end of the rotary shaft 11 so that the rotation of the rotary roller 8 is transmitted.

A fourth pulley is provided at the separated position on the cloth fell side of the third pulley 15.
17 is rotatably attached. This third pulley 15
A belt 19 serving as a rotation transmitting means is stretched between the fourth and the fourth 17 as well, and the rotation of the rotating roller 8 is transmitted to the fourth pulley 17.

The belt 10 spanned between the first pulley 6 and the second pulley 13 does not matter in particular in terms of material and sectional shape, but it is spanned between the third pulley 15 and the fourth pulley 17. The belt 19 is made of, for example, rubber and has elasticity, and its cross-sectional shape needs to be thick enough to be elastically deformed when pressed, such as a circular shape or an elliptical shape. Reference numeral 20 in the drawing denotes a tension roller for applying a tension to the belt 19, and it may be provided if necessary.

An arm 23 is attached to a predetermined position of the bracket 1, that is, a predetermined lower position between the third pulley 15 and the fourth pulley 17 so as to be vertically swingable about a pin 22. A clamp roller 25 is rotatably attached to a position corresponding to the fourth pulley 17 at the cloth fell side end of the arm 23.

A leaf spring 27 is integrally attached to the other end of the arm 23, and an end of the leaf spring 27 is in contact with an adjusting screw 29 screwed to the bracket 1 so as to be able to move forward and backward.

When the adjusting screw 29 is rotated and advanced toward the leaf spring 27, the arm 23
Is to lift the end of the clamp roller 25 on the pin 22 side, and the clamp roller 25 is to press the belt 19 against the fourth pulley 17. Then, the belt 19, which is shaped like being sandwiched between the clamp roller 25 and the fourth pulley 17, is elastically deformed as shown in FIG. Therefore, by adjusting the advancing degree of the adjusting screw 29, it is possible to change the pressing degree of the clamp roller 25 and also the elastic deformation degree of the belt 19 in the portion in contact with the clamp roller 25.

The fact that the pressing degree can be changed in this way changes the holding force of the weft ends. And
By changing the elastic deformation degree of the belt 19, it is possible to change the number and time of the weft yarns held between the belt 19 and the clamp roller 25. For example, when the weft density is coarse, the grip length is increased, and when the weft density is high, the grip length is shortened.

<< Second Embodiment >> In the first embodiment, the first rotating body is composed of the belt 19 made of an elastic body, and the second rotating body is the clamp roller.
However, the invention is not limited to this. That is, as shown in FIG. 3, instead of the clamp roller 25, the belt 35 hung between the fifth pulley 31 and the sixth pulley 33, which is the second rotating body, is replaced with the belt 35.
Alternatively, the belt 18 may be pressed and contacted between the pulley 15 and the fourth pulley which is the first rotating body.
In this case, at least one of the belt 19 and the belt 35 may be made of an elastic body. Furthermore, by making the fifth pulley 31 which is the second rotating body movable in the direction of the belt 19,
Be prepared to change the degree of pressing and the gripping force.
Then, with the belt 35 stretched around the sixth pulley 33,
That is, if the fifth pulley 31 is made to rotate in the vertical direction with the center of rotation as the center of rotation, the belt 19 and the fifth pulley 31 spanning between the third pulley 15 and the fourth pulley 17 are The contact length with the belt 35 hung around the sixth pulley 33 can be changed, whereby the gripping length of the weft can be adjusted. As a moving mechanism for the fifth and sixth pulleys, a publicly known means such as a spring may be used as appropriate.

<< Third and Fourth Embodiments >> In the first and second embodiments, at least one of the rotating bodies is composed of a belt, but in the third embodiment, as shown in FIG. The body 51 and the second rotating body 53 may both be rollers. In this case, the first rotary body 51 is mounted on the drive shaft 52, and at least the contact portion with the clamp roller 53, which is the second rotary body, is made of an elastic material. Then, the second rotating body is made of a rigid body. It is sufficient that the contact portion of the first rotating body 51 with the clamp roller 53 is at least an elastic body, and the first rotating body 51 is made of a rigid body, and an elastic material is attached around the rigid body. May be

Even if the drive shaft 52 for positively rotating the first rotating body 51 is directly connected to the rotating shaft of the dedicated motor, as shown in FIG. You may do it in advance. When a small motor dedicated to the yarn end processing device is used to rotate the first rotating body 51, it is desirable that the rotation speed can be freely changed as the cloth winding speed is changed. .

In the case of the third embodiment, a moving mechanism is provided such that the second rotating body (clamp roller) 53 is relatively close to and separated from the first rotating body 51. Then, by moving the second rotating body 53 relative to the first rotating body 51 in the separating direction or the pressing direction, the pressing degree and the elastic deformation degree of the elastic material of the first rotating body 51 are increased. The gripping force and gripping length can be changed.

In the third embodiment, the first rotary body 51 is made of an elastic body and the second rotary body 53 is made of a rigid body, but in the fourth embodiment, it is shown in FIG. The first and second rotating bodies 51 and 53 are both made of an elastic body, and both contact portions are elastically deformed when the contact degree of these rotating bodies is relatively changed. If this is done, the gripping length can be made longer than that of the third embodiment.

<< Effect of the Invention >> According to this invention, the elastic body interposed between the first rotating body and the second rotating body is brought into contact by the biasing force adjusting mechanism provided on either one of the two rotating bodies. The weft holding force can be freely changed because the degree of pressure is adjusted so as to be in pressure contact. Further, the elastic body portion is elastically deformed at the time of the above-mentioned pressing contact, the weft holding length (weft holding time) can be changed, and ear loosening can be effectively prevented even with various kinds of wefts and fabrics with different weft insertion densities. The quality of the woven fabric can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention. FIG. 2 is an explanatory view showing the periphery of the main part. FIG. 3 is an explanatory view showing a second embodiment of this invention. FIG. 4 is an explanatory view showing a third embodiment of this invention. 1 …… Bracket, 3 …… Arm, 11 …… Rotary axis, 6,
13, 15, 17, 31, 33 ... Pulley, 19 ... Belt (first rotating body), 25 ... Clamp roller (second rotating body), 35
...... Belt (second rotating body), 51 …… First rotating body, 53
...... Second rotating body

Claims (1)

[Scope of utility model registration request] 1. A first rotating body which is driven and rotated in the cloth winding direction in the vicinity of the woven fabric edge, and is driven and rotated by contact with the first rotating body via an elastic body. A second rotating body, wherein the contact portion is provided on the weaving cloth extension line, and a biasing force adjusting mechanism for adjusting the contact degree of the contact portion is attached to either the first or the second rotating body. A yarn end treatment device for a shuttleless loom.