JPH05331722A - Tension device for double twister - Google Patents

Abstract

PURPOSE:To obtain a tension device, capable of preventing an air stream from flowing to a sliding part following the sliding and lowering of a lower receiving material, ensuring the lowering distance of the lower receiving material and simultaneously preventing fly wastes from storing in the sliding part. CONSTITUTION:In the objective tension device 15 in a double twister equipped with a capsule tenser 32, arranged and nipped between an upper receiving material 24 internally installed in a cylindrical unit 22 and a lower receiving material 26, slidable and lowerable with an air stream in the cylindrical units 21 and 22, a sealing material 41 is interposed between the cylindrical unit 21 and a guide cylinder (37a) for the lower receiving material 26 to shut off a gap between the cylindrical unit 21 and the lower receiving material 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension device for applying a predetermined tension to a yarn drawn from a yarn supplying bobbin and twisted in a double twisting machine.

[0002]

2. Description of the Related Art First of all, a double twisting machine is one in which a yarn supplying bobbin is placed on a stationary platen, and a yarn guided downward through the center of the yarn supplying bobbin is placed along a rotary disk arranged under the stationary platen. And twisting twice in the process of guiding the yarn to the upper balloon guide. A typical example of such a double twisting machine will be described with reference to FIG. A support tube 1 is fixed to a frame 2, and a spindle 4 is rotatably supported by the support tube 1 via a bearing 3. Further, a wobble 5, which is a spindle rotating body, a yarn storage board 6, and a rotating disk 7 are integrally fixed to the spindle 4. Further, a stationary platen 9 is supported on the spindle 4 via bearings 8, and a magnet 10 fixed to the stationary platen 9 and a magnet case 1 are attached.
The stationary platen 9 is attracted by the magnet 12 fixed to the magnet 1.
Keeps still. Next, the yarn feeding cover 13 is fixed to the stationary platen 9, and the outer balloon limiting cylinder 14 is fixed to the outer ring 11. The magnet case 11 is fixed on the frame 2. On the stationary platen 9, the yarn feeding packages P1 and P2 are placed in two upper and lower stages via the yarn feeding support 57, and the tension device 15 is fitted and installed in the central tubular portion 9a of the stationary platen 9. .. 16
Is a belt for rotating the spindle 4 in contact with the warb 5. A thread passage 17 communicating with the tension device 15 and the central tubular portion 9a of the stationary board 9 is formed.
The lower end of 7 is bent to the outside 17a and communicates with the yarn outlet hole 18 formed in the radial direction of the yarn storage board 6. An air passage 19 is also formed in the spindle 4 below the yarn storage board 6, and the upper end of the passage 19 is bent 19a in the radial direction of the yarn storage board 6 and communicates with the yarn outlet hole 18. .. Reference numeral 20 denotes a compressed air jet nozzle connected to the lower end of the spindle 4.
Reference numeral 58 is a balloon guide, and 57b is a flyer. In the double twisting machine having such a structure, the yarns Y1 and Y2 unwound from the yarn supplying packages P1 and P2 are combined, and the yarn guide 57d of the yarn supplying support 57, the tension device 15 and the yarn passage 17 and It is guided to the yarn guide hole 18, passes between the yarn supply cover 13 and the outer balloon limiting cylinder 14, and is guided to the upper balloon guide 58. At that time, the yarn accumulator 6 or the rotating disk 7 is rotated by the driving force of the belt 16, and the combined yarn Y3 is twisted twice.

By the way, in the double twisting machine, a tension device is provided so as to surely perform the twisting. That is, as a tension device installed in the center hole of the yarn feeding package, a capsule-type tensor is provided in a part of the yarn passage hole in the cylindrical body, and the yarn is nipped at a constant pressure between the capsule tensor and the capsule tensor holding member. At the same time, tension is applied to the yarn. When such a tension device is provided, it is necessary to allow the capsule tenser to escape from the yarn passage during the yarn threading operation so that the yarn passage is free of obstacles. Therefore, there is also a method of releasing the capsule tensor at a position where the air flow passage is not blocked by using a flexible guide tool such as nylon thread. However, since the work is troublesome and the worker must always perform the work, it is difficult to completely automate the threading operation. Therefore, an automated tensioning device described below is used to supply the yarn. It enables the use of exchange robots.

Next, with reference to FIG. 3, the structure of the tension device 15 which is capable of automatically forming the thread passage during threading will be described. The figure (a) shows the capsule tensor 32 when the yarn is running.
(B) shows a state in which the capsule tensor 32 is released. In FIG. 1A, the tension device 15 is inserted into the lower tubular body 21 and the upper tubular body 22, and the upper receiving member 24 is inserted and fixed in the upper tubular body 22 via the tension adjusting screw 23. A first tubular body 25 fixed to the upper receiving member 24 and extending upward; a lower receiving member 26 which is located below the upper receiving member 24 and is slidably inserted into the lower tubular body 21; The second pipe 27 integrally fixed to the lower support member 26, the partition plate 28 below the lower support member 26 fixed to the lower cylinder 21, and the partition plate 28 integrally fixed to the partition plate 28. It comprises a third tube 29 into which the second tube 27 can be inserted. Further, between the upper receiving member 24 and the lower receiving member 26, there is built in the upper cap 30, the lower cap 31, and the upper and lower caps 30, 31 by a spring urging the two caps in a direction to separate them. A capsule-type tensor 32 is installed. Reference numeral 33 denotes a magnet fixed to the housing 23 at the side of the capsule tensor 32.
The upper receiving member 24 has a conical surface 24a that expands downward and is hollow, and the lower supporting member 26 has a conical surface 26a that expands upward and is hollow. A stopper 34 is fixed to the upper tubular body 22 between the two receiving members 24 and 26.
The stopper 34 has an elliptical groove 35, and the shorter groove length d is larger than the diameter of the lower cap 31 and the upper cap 30.
Is smaller than the diameter of. A compression spring 36, which is a spring material, is interposed between the partition plate 28 fixed to the lower tubular body 21 and the lower receiving member 26, and always urges the lower receiving member 26 upward. An upper guide cylinder 37a is provided below the lower support member 26.
And the lower guide tube 37b are integrally formed, and the lower receiving member 26
No wobbling when sliding.

The operation of the tension device 15 having the above structure will be described below. When performing threading from the state of FIG. 3A, an air flow is jetted from the compressed air jet nozzle 20 of FIG. The air flow passes through the air passage 19 and passes through the yarn outlet 1
8 flows out of the yarn storage board 6. Due to the air flow, the yarn passage 17 has a negative pressure, and an air flow is also generated in the yarn passage 17.
Returning to FIG. 3A, the room 3 in which the air flow is partitioned by the lower surface of the lower support member 26, the partition plate 28, and the lower tubular body 21.
It acts on the inside of the chamber 8 to bring the inside of the chamber 38 into a depressurized state. Due to the reduced pressure state, the lower support member 26 slides downward along the lower cylindrical body 21 against the force of the compression spring 36. By the sliding, the upper and lower caps 30 and 31 of the capsule tensor 32 are separated by their springs, and the force pressing the upper and lower receiving members 24 and 26 of the caps 30 and 31 is reduced, and the capsule tensor 32 is attracted to the magnet 33. Then, the state shown in FIG. The capsule tensor 32 is locked by the shorter groove surface of the long groove 35 and does not move downward together with the lower receiving member 26. The capsule tensor 32 is surely attracted to the magnet 33,
Forming a substantially linear yarn path. Note that, in FIG. 3A, the position of the magnet 33 is illustrated as being rotated by 90 ° for convenience of illustration.

[0006]

In the conventional tension device for the double twisting machine described above, the passage of the second tubular body 27 of the lower support member 26 of FIG. A pressure difference is generated between the chambers 38 and 39 in the front and rear of the lower support member 26, and the lower support member 26 slides down against the biasing force of the spring 36. In order for the lower receiving member 26 to slide down, a gap ε between the lower cylinder 21 and the guide cylinder 37a is required.
1 or the gap ε2 between the upper cylinder 22 and the guide cylinder 37b is required. In particular, when the lower tubular body 21 and the upper tubular body 22 are made of zinc die cast or plastic, the molding error is large and the gaps ε1 and ε2 are also large. As a result, due to the air bypassing the gaps ε1 and ε2, the chambers 38 and 3
The pressure difference of 9 becomes small, and the under support 2
No. 6 was not lowered, and there was a problem that it could cause threading failure by a yarn feeding robot or the like. Further, there is a problem that the cotton wool carried by the air flow that bypasses the gaps ε1 and ε2 gradually accumulates in the space A, and the upper limit position of the lower receiving material 26 changes.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to prevent the air flow to the sliding part due to the sliding lowering of the under support material. An object of the present invention is to provide a tensioning device for a double twisting machine that can prevent the above-mentioned material, secure the descending distance of the under-supporting material, and prevent the accumulation of fly cotton in the sliding portion.

[0008]

A tension device for a double twisting machine according to the present invention which achieves the above object comprises an upper support member provided in a cylindrical body and a lower support capable of sliding down by the air flow in the cylindrical body. In a tension device in a double twisting machine, in which a capsule tensor to be sandwiched is arranged between a receiving member and a receiving member, a sealing member is interposed between the tubular body and the lower receiving member.

[0009]

The sealing material interposed between the tubular body and the underbearing material blocks the gap between the tubular body and the underbearing material, and blocks the air flow through the sliding portion of the underbearing material.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of the main part of the tension device of the present invention. The basic structure and operation of the double twisting machine and the tension device are the same as those described with reference to FIGS. 2 and 3, and the structure of the sliding portion of the undercoat material, which is the main part of the present invention, will be described. ..

In FIG. 1, a difference from that described with reference to FIG. 3 is that a circumferential groove 40 is formed in a guide cylinder 37a of the lower receiving material 26, and a packing 41 is fitted in the circumferential groove 40. It is a point. The packing 41 has a V-shaped cross section, is easily deformed in the radial direction, and has a small sliding resistance. Then, by the air that is going to pass through the gap ε (usually about 0.3 mm) from the top to the bottom, the packing 41
Is deformed in a direction in which the inclination of the hypotenuse outside the
The gap ε of the sliding part with 1 is blocked.

As a result, there is no air flowing through the gaps between the cylinders 21 and 22 and the lower receiving member 26, and almost all the air flow is the second.
Flowing in the pipe 27, a large pressure difference is generated before and after the chambers 38 and 39, and the lower support material 26 descends to a predetermined position (FIG. 3).
(See solid line position in (b)). Further, when the air flowing through the gap between the cylinders 21 and 22 and the lower receiving member 26 disappears, the cotton wool does not flow into the gap.

The above-mentioned packing 40 is used as the lower support member 26.
It suffices to provide at least one in an appropriate position on the sliding portions of the cylindrical bodies 21 and 22, and for example, it can be provided on the outer circumference of the guide cylinder 37b. Further, as the structure of the double twisting machine, a case is shown in which the yarn feeding packages P1 and P2 are placed in upper and lower two stages and twisting can be performed simultaneously with the compounding yarn. A double twisting machine may be used, and the use of the outer balloon limiting cylinder 14, the yarn supplying cover 13 and the like is optional. further,
The retracting means from the yarn passage at the time of releasing the capsule tensor of the tension device is not limited to the magnet but may use an inclined guide. In short, if it is a tension device in a double twisting machine, in which a capsule tensor arranged between an upper receiving member provided in a tubular body and a lower receiving material capable of sliding down by the air flow in the tubular body is arranged, The present invention can be applied.

[0014]

The tension device of the double twisting machine of the present invention is such that a sealing material is interposed between the tubular body and the underbearing material. Since the gap is blocked and the air flow passing through the sliding portion of the lower support material is blocked, the pressure difference before and after the lower support material becomes a predetermined value, and the descending distance can be secured to reduce failure of threading. The cotton wool does not accumulate on the sliding portion, and the upper limit position of the base material is always constant, so that the yarn tension by the capsule tenser can be maintained at a predetermined value.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a tension device of the present invention.

FIG. 2 is a sectional view of the entire double twisting machine.

FIG. 3 is a sectional view of a main part of a conventional tension device.

[Explanation of symbols]

 15 Tension Device 21 Lower Cylinder 22 Upper Cylinder 24 Upper Receiving Material 26 Lower Receiving Material 32 Capsule Tensioner 41 Packing

Claims (1)

[Claims] 1. A tension in a double twisting machine in which a capsule tensor is arranged between an upper support member provided inside a cylindrical body and a lower support member capable of sliding down in the cylindrical body by an air flow. A tension device for a double twisting machine, characterized in that a sealing material is interposed between the tubular body and the underlay material.