JPH0790983B2 - Tensioning device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for applying tension to a yarn and cutting the yarn in a textile machine such as a spinning machine or an automatic winding machine.

(Prior art and its problems) Generally, a spinning machine is equipped with a draft device 3 as shown in FIG.
0, yarn forming device 31, take-up device 32, tension applying device 33,
The slab catcher 34 and the winding device 35 are arranged in this order, and if the yarn has a defect such as a slab, the draft device 30 is stopped by the signal of the slab catcher 34, and the yarn forming device 31 Yarn formation is interrupted. Then, the yarn on the winding device 35 side until it is interrupted in the yarn forming device 31 is wound into a package. Next, the draft device 30 is operated to spin the yarn from the yarn forming device 31, and the yarn spun from the yarn forming device 31 by an automatic yarn joining device (not shown) and the winding device. The yarn that has been pulled out from the 35 packages and the defective parts have been removed is spliced with a knotter to restart the winding of the yarn. In this case, since the yarn cutting in the yarn forming device 31 is performed by the action of aerodynamic force regardless of the blade, the yarn end becomes a brush shape, and the yarn wound in the package of the winding device 35. There is a problem in that the end of the yarn adheres to the peripheral surface of the package and the yarn end is difficult to pull out in an automatic yarn joining device or the like. Further, in the yarn splicing operation, it is preferable to move one of the tensioner, which is the tensioning device 33, or a tensioning member such as a movable guide to perform threading with a predetermined gap provided between the tensioning members. Has a problem in that a mechanism for moving the tension applying member has to be installed in the automatic yarn joining device, and the configuration of the automatic yarn joining device becomes complicated.

(Object) The present invention solves the problems as described above, and as a result of a study for the purpose of providing a tension applying device having a compact configuration in which a tension cutting tensor is internally provided with a yarn cutting cutter It has been done.

(Means for Solving Problems) That is, according to the present invention, a pair of plate tensors are rotatably supported by a supporting member, and a cutting member is moved in a longitudinal direction of an axial center of the supporting member at a rotation center of the plate tensor of the supporting member. The plate tensors are freely attached to each other, and one of the plate tensors is pressed by the cutting operation of the cutting member to form a predetermined gap with the other plate tenser.

(Example) The structure of one example of the tension applying device of the present invention will be described with reference to the drawings.

In FIG. 1 and FIG. 2, 1 is a support member, and the first plate tensor 2 and the second plate tensor 3 are rotatably attached to the ends thereof. The support member 1 is provided with a substantially rectangular hole 1a for inserting the blade support member 9 in the axial center portion thereof, and is V-shaped in the axial longitudinal direction orthogonal to the hole 1a,
In addition, a notch 1b for thread hooking is formed at about 270 ° in the circumferential direction. Reference numeral 4 denotes an outer cylinder integrally attached to the support member 1 by crimping or screwing, and a notch portion 4a having substantially the same shape is formed at the same position as the notch portion 1b of the support member 1. . Reference numeral 5 denotes a screw body screwed to the end portion of the outer cylinder 4, and a scale cylinder body 14 is fixed to the outer peripheral portion by a screw 15. Reference numeral 6 denotes a conical spring mounted between the second plate tensor 3 and the screw body 5 so that the second plate tensor 3 is always brought into contact with the first plate tensor 2 with a predetermined surface pressure. There is. The second plate tensor 3 supports the spring 6 by a pivot bearing in order to reduce the rotational resistance. Reference numeral 7 is a solenoid screwed to the support member 1, and a shaft body 8 is movably mounted on the solenoid. A blade support member 9 is attached to one end of the shaft body 8, and a spring receiving member 10 is attached to the other end. Then, a thread hooking groove is formed in the blade supporting member 9, a blade 12 is attached by a screw 13, and when the solenoid 7 is excited, the blade 12 together with the shaft 8 is
Direction, the yarn 20 supported between the wall surfaces 1c and 1c 'of the cutout portion 1b of the support member 1 is cut, and the second plate tenser 3 is moved to move the second plate tenser 3 to the first position as shown in FIG. A predetermined gap is formed between the one-plate tensor 2. Reference numeral 11 denotes a spring mounted between the solenoid 7 and the spring receiving member 10 so that the shaft body 8 always projects in the (a) direction.

The operation of cutting and threading the yarn in the above-described tension applying device will be described.

In the spinning machine shown in FIG. 4, the yarn 20 spun from the yarn forming device 31 is held by the first plate tensor 2 and the second plate tensor 3 of the tension applying device 33, and wound at a preset tension. It is wound up on the device 35. At this time, the yarn path of the yarn 20 in the plate tensor 2 and 3 is, as shown in FIG.
20a runs at the center of rotation of the plate tensors 2 and 3, and the yarn 20b on the delivery side is (l) mm from the center of rotation, for example, 2 mm to
Driving at a position that is 5 mm off. Therefore, when the yarn 20 travels, a rotational force acts on the plate tensors 2 and 3, and the plate tensors 2 and 3 are rotated at a predetermined speed. If the yarn 20 has a defective portion such as a slab, an operation signal is sent from the slab catcher 34 to the solenoid 7 to excite the blade 12 and the blade 12 in the (b) direction as shown in FIG. To be done. At this time, thread 2
The yarn path is regulated by contacting the wall surfaces 1c and 1c 'with the notch 1b of the support member 1 under a preset tension. Therefore, when the blade 12 moves in the direction orthogonal to the running direction of the yarn, the yarn 20 is cut. Then, when the shaft body 8 moves to a predetermined position, the end portion of the blade support member 9 moves to the second position.
The spring 6 is pressed against the plate tensor 3 to move the plate tensor 3, and a gap is formed between the plate tensor 3 and the first plate tensor 2. In this state, an automatic yarn splicing device (not shown) operates and the upper yarn spun from the yarn forming device 31 and the winding device.
The lower thread pulled out from the 35 packages is conveyed to the knotter and spliced. When the spliced yarn 20 travels in the gap between the first plate tensor 2 and the second plate tensor 3, a non-operation signal is sent to the solenoid 7 and the excitation is erased. Then, the spring 11 moves the blade 12 together with the shaft 8 in the (a) direction and returns the blade 12 to the standby position. When the shaft 8 is moved, the second plate tensor 3 is also moved in the (a) direction by the spring 6, and is brought into contact with the first plate tensor 2 with a predetermined surface pressure, toward the winding device 35. Tension is applied to the running yarn 20.

At the time of the above-mentioned yarn joining, the yarn 20 is the blade attached to the blade support member 9.
The vehicle travels above 12 and the solenoid 7 returns to the standby position to travel in the normal positions 1c, 1a, 1c '.

On the other hand, the tension applied to the yarn 20 is changed by increasing or decreasing the pressing force of the spring 6 while the second plate tensor 3 is in contact with the first plate tensor 2. That is, the screw body 5 for receiving the spring 6 is moved in the axial direction with respect to the outer cylinder 4 to finely adjust the pressing force of the second plate tensor 3, and the screw marks are engraved on the outer circumference of the scale cylinder 14. The turning position of the body 5 is reproducibly adjusted so that the tension setting can be changed.

The tension applying device of the present invention can be applied to an automatic doffing device, a sewing machine and the like in addition to a spinning machine.

(Effect of the invention) As described above, according to the present invention, the pair of plate tensors are rotatably supported by the supporting member, and the cutting member is movably mounted on the center of rotation of the plate tenser of the supporting member in the axial longitudinal direction of the supporting member. Since the plate tensor is mounted and pressed by the cutting operation of the cutting member to form a predetermined gap between the plate tensor and the other plate tenser, the following effects can be obtained. it can.

(1) Since one of the plate tensors is pressed by the cutting operation of the cutting member to form a predetermined gap with the other plate tensor, the plate tensor is installed in the automatic yarn joining device during the yarn joining operation. Therefore, it is not necessary to move the yarn by the operating mechanism, and the structure and control circuit of the automatic yarn joining device can be simplified.

(2) Since the cutting member is provided at the center of rotation of the dish tensor, the entire tension applying device can be made compact.

(3) Since the tensioner-providing dish tensor is rotatably mounted on the support member, the dish tensor is rotated by the traveling of the yarns, the yarns are smoothly moved, and the fluctuation in tension is reduced. You can

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of the tension applying device of the present invention. FIG. 2 is a view on arrow Z in FIG. FIG. 3 is a schematic sectional view showing a yarn cutting operation state. FIG. 4 is a schematic view showing one embodiment of a spinning machine provided with a tension applying device. 1: Support member, 2: First plate tensor, 3: Second plate tensor, 4:
Outer cylinder, 5: Screw body, 6, 11: Spring, 7: Solenoid, 8:
Shaft, 9: Blade support member, 12: Blade,

Claims (1)

[Claims] 1. A pair of plate tensors are rotatably mounted on a support member, and a cutting member is mounted on a center of rotation of the plate tenser of the support member so as to be movable in a longitudinal direction of an axis of the support member. A tension applying device, characterized in that one is pressed by a cutting operation of the cutting member to form a predetermined gap with the other plate tenser.