JPH0144534Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a device for holding a bobbin integrally on a rotating bobbin holder in a machine for winding a continuously supplied yarn onto a bobbin.

[Conventional technology]

In winding machines such as take-up devices that wind melt-spun yarn, a plurality of bobbins are inserted in series around the outer periphery of a cylindrical bobbin holder, and each bobbin is rotated by a motor. The threads are wound around the outer periphery of each bobbin by rotating them together.

A bobbin holding device is provided on the outer peripheral surface of the bobbin holder to tightly hold the inserted bobbin on the bobbin holder. Conventionally, this bobbin holding device has a plurality of elastic rings and spacers arranged alternately along the axial direction of the holder on the outer periphery of the bobbin holder body, and compresses the elastic rings from the axial direction via the spacers. By expanding and deforming the bobbin in the radial direction, the outer surface of the bobbin holder main body and the inner surface of the bobbin are pressed against each other, and the bobbin is integrally held on the shaft.

[Problem that the invention attempts to solve]

The force that compresses the elastic rings from the axial direction is propagated from the elastic ring on one side of the bobbin holder (usually from the tip side) to the other side through the spacer, and compressive force is applied to all the elastic rings. Ru.

However, there are cases where the above-mentioned compressive force does not propagate reliably, and in that case, the elastic ring located far from the pressing means (usually on the proximal side) may not be sufficiently deformed by the pressing force of the compressive force. This made the bobbin unstable to hold, causing mechanical troubles or adversely affecting thread quality.

The inventor's experiments and observations have revealed that the cause of the inability to reliably propagate the compressive force is that metal white powder within the bobbin holding device prevents the spacer and the elastic link from sliding. Furthermore, it was also found that the white powder was generated due to wear of the inner circumferential surface of the spacer and the outer circumferential surface of the bobbin holder main body corresponding to the inner circumferential surface. This wear occurs because when the bobbin holder is driven to rotate, the inner peripheral surface of the spacer swings in a direction perpendicular to the axial direction with respect to the outer peripheral surface of the bobbin holder main body, resulting in contact between the two.
It is thought that the accident occurred due to a collision.

[Means for solving problems]

This invention is a bobbin holding device in which a plurality of elastic rings and spacers are arranged alternately along the axial direction of the bobbin holder on the outer periphery of the bobbin holder body, and the contact portions of the spacers with the bobbin holder are It is made of resin.

[Effect]

The resin spacer alleviates contact and collision between the spacer and the bobbin holder body, and further suppresses bobbin vibration due to the vibration absorbing effect of the resin.

〔Example〕

FIG. 1 shows a cross section of a bobbin holder to which the present invention is applied, in which a cylindrical bobbin holder main body 1 is rotatably supported by a frame 3 via a bearing 2. An air supply path 4 is provided at the axial center of the main body 1, and an air chamber 5 communicating with the supply path 4 is formed at the tip of the main body 1. Inside the air chamber 5, a fixing plate 6 fixed to the indoor wall and having a hole in the center and a piston 7 slidable along the indoor wall are provided, and an axis between the piston 7 and the fixing plate 6 is provided. 8
A spring 9 is provided. Further, a cap 11 that is slidable in the axial direction along the outer periphery of the bobbin holder body 1 is fitted to the tip end of the bobbin holder body 1, and the shaft 8 passes through the center hole of the fixing plate 6 to form the cap 11. is fixed. Furthermore, there are two annular stepped portions 1 on the outer periphery of the base end of the bobbin holder body 1.
2, 13 are formed, and the inner first step 1
2 and the cap 11, a plurality of bobbin holders 14 and spacers 15, which are elastic rings, are alternately and slidably inserted. The outer peripheries of each holder 14, spacer 15, and step portion 12 are set to be substantially on the same surface, and a plurality of bobbins B are inserted in series on these outer peripheries. The bobbin holder 14 includes an elastic rubber ring 16 and the ring 1.
6 and a metal ring 17 fixed to the outer periphery of the ring. Note that the holding body 14 is not limited to the above shape.

As shown in FIG. 2, the spacer 15 is made of a metal spacer body 20 with a resin ring body 21 fitted from the inside, and the ring body 21 is made of resin, such as polyacetal resin or various types of nylon. It is made by molding. The inner diameter d1 of the ring body 21 is smaller than the innermost diameter d2 of the spacer body 20, and the inner diameter d1 is formed to be approximately the same as the diameter of the bobbin holder body 1.

FIG. 1 shows a state in which the bobbin holder 14 holds each bobbin B. As shown in FIG. When releasing the bobbin B from this state, compressed air is supplied from a compressed air source (not shown) into the air supply path 4, the air flows into the chamber 5, and the piston 7 is moved to the left in the figure against the force of the spring 9. Then, the pressing force on each holder 14 is released, and each bobbin B becomes detachable.

Conversely, when inserting empty bobbin B onto the bobbin,
The compressed air in the air supply path 4 is released to the outside. At this time, the cap 11 moves to the right in the figure by the force of the spring 9, and each holder 14 and spacer 1
Apply pressing force to 5. This pressing force is applied to the holder 14
The pressure is transmitted from the distal end to the proximal end of the bobbin holder through the spacer 15, from left to right in FIG. 1, and each holder 14 is sequentially compressed and deformed to press and hold each bobbin B from the inside. With each bobbin B held in the bobbin holder in this manner, the main body 1 is rotationally driven by a motor (not shown), and thread is wound onto each bobbin B.

As described above, the spacer 15 needs to slide along the holder body 1 when the bobbin B is attached or detached. If all of the spacers 15 are made of metal, the inner circumferential diameter of the spacer 15 is made slightly larger than the outer circumferential diameter of the main body 1 to provide a gap between the two to enable the above-mentioned sliding movement. There is a need,
Such a gap caused the spacer 15 to vibrate around the outer periphery of the main body 1 during one rotation of the bobbin holder, and due to this vibration, the inner surface of the spacer 15 and the outer circumferential surface of the bobbin holder main body 1 were fretted and metal powder was generated.

However, according to this embodiment, since the contact portion 21 of the spacer 15 with the bobbin holder main body 1 is made of resin, the outer circumferential diameter of the main body 1 and the spacer 1
Even if the inner circumferential diameters of the spacers 5 and 5 are made approximately the same, the spacer 15 can slide on the outer circumference of the main body 1 due to the sliding properties peculiar to the resin, so the gap is reduced and the runout is reduced, and the spacer 15 does not wobble to some extent. However, the vibration is absorbed by the resin material 21. Therefore,
The generation of metal powder due to wear and fretting between the spacer 15 and the bobbin holder body 1 is drastically reduced.

[Effects of the invention] As explained above, according to the invention, the generation of metal powder during the rotation of the bobbin holder has been drastically reduced, so the force that compresses the elastic ring is reliably propagated, and all bobbins are spread evenly. It was able to be held in the bobbin holder by force.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view of the bobbin holder, and FIG. 2 is a longitudinal side view of the spacer. DESCRIPTION OF SYMBOLS 1... Bobbin holder main body, 14... Elastic ring, 15... Spacer, 21... Resin body.

Claims (1)

[Scope of utility model registration request] A bobbin holding device comprising a plurality of elastic rings and spacers arranged alternately along the axial direction of the bobbin holder on the outer periphery of the bobbin holder body, wherein the contact portion of the spacer with the bobbin holder is made of resin. A bobbin holding device featuring: