JPS6058148B2 - Collection of winders for yarn winding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winding collet (mandrel) for use in a winder for winding yarns of glass fibers and synthetic fibers.

These yarns are the winder's collet (mandrel)
The package is then rolled up onto a tube rotating at high speed.

Since the package is wound up to a fairly large diameter, a portion of the core tube of the package is deformed at intervals during winding due to the strong external pressure of the accumulated winding tension from the thread layer of the package. As a result, an imbalance occurs with respect to the rotation axis of the package, which causes the collet to vibrate during high speed rotation. In order to avoid the above-mentioned drawbacks, recesses are formed at regular intervals on the outer surface of each of the many fingers that are arranged in a manner that they can move in and out of the collet circumferential surface, to allow the tube to deform in the interval.
A device that guides the deformation of the tube into this recess has already been provided (Japanese Patent Publication No. 47-16260).

This can achieve its purpose when the tube is made of paper, but when using a tube made of plastic material, the deformation does not occur in the expected position as in the case of a paper tube. Even when a plastic tube is used, this invention eliminates vibrations during collet winding caused by imbalance by inducing the deformation of the recesses only at equidistant positions along the circumference of the tube. The purpose is to prevent

In order to achieve this object, the present invention has a structure in which a plurality of fingers at symmetrical positions, that is, 2 to 5 fingers, are removed from among the many fingers on the outer periphery of the collet. At least the finger in this position is formed to have a lower height by holding the outer circumferential surface a little closer to the collet rotation axis than the other fingers before winding is started.
The invention will be explained below with reference to the drawings. In the figure 1
is the rotating shaft of the collet 2 and is rotated at high speed.

Reference numeral 3 denotes a tube fitted around the outer periphery of the collet 2, and a large diameter yarn of glass fiber or synthetic fiber is wound around the outer periphery of this tube.

Reference numerals 4 and 5 are fingers, the support portions 6 of which are slidably fitted into radial guide holes 7 of the collet body 2a.

However, finger 5 is different from other fingers 4 as explained below. A compression spring 9 is interposed between the inner bottom surface of each guide hole 7 and the end of the support part 6.
is always biased toward the outer periphery. Reference numeral 8 denotes a stopper, which fits into a groove on the inner circumferential surface of each guide hole 7.

Each support 6 has a groove 10 in which a stop 8 engages, limiting the stroke of the slide of each finger in the guide hole 7. Note that the fingers extend in a direction perpendicular to the plane of the drawing and cover the outer periphery of the collet 2. The illustrated state is before starting to wind the yarn around the tube 3, and the support portion 6 of each finger has been pushed outward until just before the inner end of the groove 10 contacts the stopper 8. There is.

In this state, each finger 4 is in contact with the inner peripheral surface of the tube 3, but only the finger 5 is separated from the inner peripheral surface of the tube 3 by a distance indicated by d. When the collet 2 starts rotating for yarn winding in the above state, each finger 4 is strongly pressed against the inner peripheral surface of the tube 3 by centrifugal force, and the tube 3 is strongly held on the collet 2. As the yarn is wound around the tube 3, the winding tension of the yarn is accumulated, and this becomes a contraction force that pressurizes the tube 3 from the outer periphery. As a result, when the tube 3 contracts, each finger 3 retracts inward in response, but the tube 3 is distorted inward at a location corresponding to the finger 5 and becomes a concave portion. This distortion is caused by the ring ′RlO of finger 5
The outer end of the ring 8 is allowed to abut against the ring 8. Although not shown, two or more fingers having the same shape as the fingers 5 are arranged on the circumference of the collet 2 in symmetrical positions. Therefore, even as the winding of the yarn progresses, the concave deformation of the tube 3 due to the shrinkage force of the package yarn layer is concentrated at locations corresponding to the fingers 5 provided in advance. Therefore, there is no unbalanced rotation point around the rotating shaft 1 in the collet 2, the tube 3 around the outer periphery of the collet 2, and the entire yarn layer of the package. Therefore, even during high-speed winding rotation, the collet can rotate uniformly without vibration. As another embodiment, the fingers 5 may be completely removed from the collet 2, but the first embodiment is more suitable for limiting the amount of deformation of the tube to a predetermined amount.

It is also possible to have a required number of fingers of different heights in reserve and use them interchangeably depending on the quality of the wound yarn.

[Brief explanation of the drawing]

The figure is a sectional view showing a part of the cross section of the collet of the present invention. 1...Rotating axis, 2...Collet, 3...
...Tube, 4,5...Finger, 6.
... Support part, 7 ... Guide hole, 8 ...
...Ring, 9...Spring, 10...
·groove.

Claims (1)

[Claims] 1. In a thread winding collet, which is provided with fingers extending along the axis of rotation at equal intervals on the outer circumferential surface and biased by a spring so as to protrude in the radial direction, the fingers are symmetrical with respect to the center of rotation of the collet. A collet for a winder for winding a single yarn, characterized in that the height of the finger at the position is formed so that the outer circumferential surface is located slightly close to the rotating shaft so that the finger does not come into contact with the inner circumferential surface of the tube when unwinding. .