JPH0318517Y2 - - Google Patents

Description

[Detailed Description of the Invention] Field of Industrial Application The present invention relates to a false twisting device for imparting false twist to yarn.

〓Prior art〓 False twisting is not applied to yarn when bulking the yarn, when winding the fiber ends of the yarn around the core in an air spinning device, or in other cases. ing.

As devices for this purpose, there are known devices that impart rotation to the yarn by bringing a rotating disk into contact with the yarn, and devices that impart rotation to the yarn by sandwiching the yarn between two running belts.

As an example of the former, three axes each having a plurality of parallel disks are placed at the vertices of an equilateral triangle, and the disks supported by the three axes overlap at the center of the equilateral triangle. False twisting device
27389) exists as an example, but this device is
Since the disk is in contact with the direction perpendicular to the direction of yarn travel, it may be efficient in giving rotation to the yarn, but the force that tries to send the yarn in the direction of travel does not act on the yarn at all. do not.

As an example of the latter, two sets of endless bodies mounted on a pair of pulleys are pressed against their outer circumferential surfaces to intersect in an X-shape, the contact surfaces are used as nip surfaces, and a thread is inserted between them to form a belt. A device that rotates and twists yarn by running a thread (U.S. Patent No.
4042373). This device inserts the thread through the nip surfaces of belts that intersect in an X-shape, so the belt runs diagonally to the direction in which the thread travels, and the thread is sent out in that direction. A force is generated, but if the thickness of the thread is slightly uneven, vibrations may be generated in the belt forming the nip surface when the thin and thick parts of the thread pass through the nip surface.

This vibration gradually attenuates even after the uneven portion of the thread passes through the nip surface, but the vibration continues for a while. As a result, the nip pressure on the nip surface fluctuates as long as the above-mentioned vibration continues, changing the number of twists of the treated yarn, impairing the uniformity of the yarn quality and causing yarn breakage.

In addition, a twisting device that nip yarn running between a pair of rolls and rotate the rolls in the same direction to twist the yarn is also described in Japanese Patent Publication No. 18534/1983.
In order to generate the nip pressure between the rolls, a spring is attached to one of the roll support arms and the tension of the spring is used to generate the nip pressure. However, according to this method, abnormal vibrations may occur due to the elasticity of the spring, which may cause fluctuations in the nip pressure and cause uneven twisting.

〓Problems to be solved by the invention〓 This invention eliminates troubles such as yarn breakage caused by abnormal vibration of the belt in conventional belt-type false twisting machines, and improves the To obtain stable running of a yarn by applying a sending force in the direction, and to obtain nip pressure by a pressing member such as an air cylinder,
Another object of the present invention is to prevent abnormal vibrations of the nip bodies caused by the nip pressure applying means between the nip bodies.

〓Means for solving the problem〓 An air cylinder is provided on one or both of a pair of disc-shaped thread nip bodies whose periphery is a thread rubbing surface and supported by a rotating shaft. The rubbing surfaces were pressed together with their center lines intersecting, and the pressed surfaces were used as nip surfaces.

〓Operation〓 The thread to be treated is nipped by the thread rubbing surfaces on the periphery of the pair of disc-shaped thread nip bodies, and the yarn is twisted by rotating both thread rubbing surfaces in the direction crossing the thread to be processed. In addition to imparting rotation, it also imparts force in the yarn feeding direction. During this time, even if there are thread irregularities in the thread to be processed and a force is applied to the nip surface in the direction of pushing it open, the thread nip body remains disc-shaped, and the nip body is pressed by a pressing member such as an air cylinder. Therefore, there is no need for a long period of time for vibration damping as in the case of an endless band stretched between a pair of rolls, and a constant nip pressure is maintained without causing any noticeable fluctuations in the nip pressure.

〓Example〓 An example of the device of the present invention will be described below with reference to the drawings.

The device of the present invention has disc-shaped thread nip bodies 1a and 1b.
A pair of , the peripheral edge thereof is a thread rubbing surface 2, and the thread rubbing surface 2 is brought into contact with its center line CL intersecting to form a nip surface 3, the thread to be treated 4 is passed between them, and the thread nip body 1a, By rotating the yarns 1b, the threads 4 to be treated nipped between them are twisted.

The thread nip bodies 1a and 1b both have a disc shape, and a ring-shaped member 6 made of rubber or the like is fitted to the periphery of the disc, and the surface thereof serves as a thread sliding surface 2. The thread nip body 1a is integrally fixed to a rotating shaft 8 supported by a bearing member 7, and the bearing member 7 is swung by a swinging arm 12 integral with a shaft 11 supported by a bearing member 10 provided on a frame 9. freely supported. A shaft 15 having a pulley 14 is supported by a shaft bearing member 13 on the lower surface of the frame 9 . Further, the frame 9 is provided with pulleys 19 and 20 above and below a shaft 18 supported by a bearing member 17 supported by a support member 16, and a belt 21 is provided between the pulley 14 and the pulley 20.
Furthermore, a belt 23 is stretched between the pulley 19 and a pulley 22 provided at the lower end of the rotating shaft 8 of the thread nip body 1a. A line belt 24, which receives power from a drive source (not shown), is brought into contact with the pulley 14. The frame 9 is fixed to the upper part of a pivoting arm 26 that is integral with a shaft 25, and by appropriately pivoting about the shaft 25, the thread nip bodies 1a and 1b can be removed from the traveling trajectory of the thread 4 to be processed. I have to.

A thread nip support arm 28 is provided on the frame 9 with a bolt 27. At the tip of the arm 28, a rotation shaft 30 of the thread nip body 1b is supported by a bearing member 29. A pulley 31 is provided at the other end of the rotating shaft 30. Similarly to the shaft 15, the frame 9 supports a shaft 33 by a shaft bearing member 32. A pulley 34 is provided on the shaft 33. Further, the frame 9 is provided with intermediate pulleys 36 and 3 on both sides by support arms 35.
7 is provided, and a belt 38 is stretched over the pulleys 31, 33, 36, and 37.

The rotating shaft 30 supporting the thread nip body 1b is
By tilting the support arm 28, the thread nip body 1b, which has an angle with respect to the horizontal direction and is supported by the shaft 30, is connected to the thread nip body 1a, which is supported by the vertical rotation shaft 8, and the thread slide. The center lines CL of the rubbing surfaces 2 are brought into contact with each other in an X-shape so as to form a nip surface 3. Then, the shaft bearing member 7 of the thread nip body 1a
A pressing member 39 is provided at the thread nip body 1a to press the thread nip body 1a in the direction of the thread nip body 1b, so that the nip surface 3 is pressed against the thread nip body 1b. In this embodiment, an air cylinder is used as the pressing member 39. This air cylinder is of a generally used bellows type in which the piston 40 moves forward and backward in response to the amount of air supplied. The yarn 4 to be treated is guided by a yarn guide member (not shown) so as to pass through the nip surface 3.

At the time of false twisting, the treated yarn 4 is as shown in Fig. 1, Fig. 2,
As shown in FIG. 4, the threads are nipped on the nip surfaces 3 of the thread nip bodies 1a and 1b, and are twisted by receiving the rotation of the thread nip bodies 1a and 1b from their thread sliding surfaces 2. To rotate the thread nip bodies 1a, 1b, the line belt 24, which receives power from a drive source (not shown), comes into contact with the pulleys 14, 34 and rotates both the pulleys 14, 34 clockwise in FIG. The rotation of the pulley 14 is transmitted to the belt 21, pulley 20, shaft 18, pulley 19, belt 23, and rotating shaft 8, and rotates the thread nip body 1a. At the same time, the rotation of the pulley 34 in contact with the line belt 24 is caused by the rotation of the belt 38,
The thread nip body 1b is rotated by the pulley 31 and the rotating shaft 30. Since the yarn nip bodies 1a and 1b both rotate in the same direction, the yarn rubbing surfaces 2 on the nip surface 3 run in opposite directions, and the yarn 4 being nipped in the meantime is not twisted. I will receive it.

The nip pressure at the nip surface 3 is
This nip pressure is generated when the yarn nip body 1a supported by the yarn nip body 1a supported by the yarn nip body 1b is pressed against the yarn nip body 1b by the pressing member 39. Once it passes, it immediately returns to its original state and nips the thread with a predetermined nip pressure.

〓Effect of the invention〓 The false twisting device of the present invention has a thread rubbing surface on its periphery, and presses a pair of disc-shaped yarn nip bodies supported by a rotating shaft with the center line of the thread rubbing surface intersecting with each other. , the pressure contact surface is used as the nip surface, and since the nip pressure is increased by installing an air cylinder on one or both of the yarn nip bodies, the yarn nip body itself does not vibrate, and the endless belt can be shaped like an X. This method eliminates the vibration damping that takes a long time to dampen, which is the case with belt-type false twisting devices where the nip surface is the intersecting surface of the belt, and the nip pressure fluctuations that occur due to the flapping of the belt. , there is no risk of abnormal vibrations occurring as in devices that press the nip body using the elasticity of the spring and generate nip pressure, and a predetermined constant pressure can be maintained, preventing thread breakage caused by this. Never.

[Brief explanation of the drawing]

The drawings show an embodiment of the device of the present invention.
2 is a side view with a portion cut away, FIG. 3 is a sectional view taken along the line of FIG. 1, and FIG. 4 is an explanatory view of the formation of the nip surface of the thread nip body. 1a, 1b... Thread nip body, 2... Thread rubbing surface,
3... Nip surface, 8, 30... Rotating shaft, 39...
Pressing member, CL...Center line.

Claims (1)

[Scope of utility model registration request] A pair of disc-shaped thread nip bodies, each having a thread rubbing surface on the periphery and supported by a rotating shaft, are provided with an air cylinder on one or both of them, and are pressed together by intersecting the center line of the thread rubbing surface. A false twisting device characterized in that the pressure contact surface is a nip surface.