JP2513471Y2 - Collet device for fiber winder - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved collet device for holding a fiber winding tube.

[0002]

2. Description of the Related Art For example, a glass fiber winding machine is provided with a collet into which a glass fiber winding tube is fitted. The collet has a collet body and a plurality of fingers arranged on the outer circumference of the collet body, and holds the tube by moving the fingers outward in the radial direction. Then, the glass fiber is wound around the tube by rotating the collet.

In the collet device for a glass fiber winder as described above, the fingers need to move radially inward when the tube is inserted into or removed from the collet. Therefore, for example, as disclosed in Japanese Utility Model Laid-Open No. 62-113172, a means for forcibly moving each finger outward in the radial direction is provided, and when the outward movement in the radial direction is released, There is one in which the fingers are moved inward in the radial direction by their own weight.

[0004]

When glass fibers are used as a reinforcing material for plastics, for example, a binder is added in order to increase the binding force with the plastics. If such a binder enters between the fingers and the tube during winding, the fingers may adhere to the tube. In particular, when a paper tube is used as the tube, the adhesive strength becomes large. Therefore, assuming that the movement of each finger inward in the radial direction is due to the weight of the finger as in the conventional case, the finger does not move inward in the radial direction due to the adhesive force,
It was difficult to pull out the tube from the collet.

Further, even in a winder for a fiber other than glass fiber, if the fingers move inward in the radial direction by their own weight, the lower fingers do not move inward in the radial direction, and therefore the moving amount of each finger. However, there is a problem in that the tube cannot be inserted and removed smoothly.

An object of the present invention is to provide a collet device for a fiber winding machine which can solve the above-mentioned problems of the prior art.

[0007]

The feature of the present invention resides in that a collet body and a plurality of fingers arranged on the outer periphery of the collet body are provided, and the fibers are formed by moving each finger radially outward. In a collet device that holds a winding tube, annular bodies are arranged on both axial ends of the fingers, and each annular body has an overhanging portion that projects radially outward from a center hole and a shaft from the overhanging portion. The protrusion and the protrusion extend along the radial direction so that the protrusion is displaced radially inward with the displacement of the protrusion in the other axial direction. A pressing body is provided that is divided into a plurality of parts by a plurality of notches, and that the protrusions press the fingers to move them inward in the radial direction so as to press the protruding portion in the other axial direction. There is a point.

[0008]

According to the structure of the present invention, when the projecting portion of the annular body is axially pressed by the pressing body, the projecting portion of the annular body is displaced inward in the radial direction. The pressed portion of each finger is pressed by this protruding portion, and each finger moves radially inward. As a result, each finger is forcibly moved inward in the radial direction.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In the glass fiber winder 1 shown in FIG. 8, a turret board 3 is rotatably mounted on a main body 2, and a pair of collets 4 is rotatably mounted on the turret board 3. A glass fiber winding tube 5 is fitted into each collet 4 so as to be freely inserted and removed.

By the rotation of the turret plate 3, the collet 4 can be freely moved between the winding position on the right side and the doffing position on the left side in FIG. The tube 5 held by the collet 4 which is rotationally driven at the winding position.
Then, a strand 8 in which a large number of glass fiber filaments 7 spun out from the bushing 6 are bundled is wound up. A binder is applied to the filament 7 through a roller 9, and the filament 7 is focused through a roller 10.

As shown in FIGS. 1 and 6, the collet 4 is
Is attached to the spindle shaft 11 of the glass fiber winder 1. The collet 4 has a cylindrical collet body 4a and a plurality of fingers 12 arranged on the outer circumference of the collet body 4a. The collet body 4a
Is fitted to the spindle shaft 11 via a tapered surface 40 and is fixed by a collet nut 30.

Further, a plurality of grooves 13 are provided on the outer circumference of the collet body 4a along the axial direction (left and right direction in FIG. 1), and the fingers 12 are inserted into the grooves 13 so as to be movable in the radial direction. A stopper 14 is attached inside each groove 13, and the stopper 14 abuts on the inner surface of the recess 15 provided in the finger 12, so that the radial movement amount of the finger 12 is within a certain range. . A spring 31 is arranged inside the groove 13 to bias the finger 12 outward in the radial direction. The strength of the spring 31 is set so that the fingers 12 are not displaced radially inward when the tube 5 is inserted into or removed from the collet 4, and the tube 5 does not come out of the collet 4 due to vibration or the like. ing.

As a result, when the collet 4 rotates along with the spindle shaft 11, the fingers 12 are pressed against the inner peripheral surface of the tube 5 by the centrifugal force, and the tube 5 is securely held by the collet 4.

Then, as shown in FIG. 7, pressed portions 17 are integrally provided at both axial ends of each finger 12. As a result, the pressed parts 17 are arranged in parallel on the circumference at both axial ends of the collet 4, and the annular body 18 is arranged so as to face the pressed parts 17 arranged on the circumference.

As shown in FIGS. 2 to 5, each annular member 18
Is preferably integrally formed of a material having relatively high rigidity and toughness, such as steel, and has an overhanging portion 20 that projects radially outward from the center hole 19 and an outer peripheral portion 20a of this overhanging portion 20.
And a projecting portion 21 projecting in one axial direction. The protruding portion 21 is located radially outward of the pressed portion 17. A plurality of notches 22 are formed in the overhanging portion 20 in the radial direction from the center hole 19 except for the outer peripheral portion 20a. A plurality of notches 23 along the radial direction are formed on the protrusion 21 on the extension of the notches 22. These notches 2
The projecting portions 20 and the projecting portions 21 are divided by 2 and 23 into the same number of portions as the fingers 12, and the other axial direction of the projecting portions 20 (the direction opposite to the projecting direction of the projecting portions 21 from the projecting portion 20).
The projection 21 is displaced inward in the radial direction in accordance with the displacement to.

In the annular body 18 located axially rearward of the fingers 12, the outer peripheral portion 20a of the overhanging portion 20 is
A back ring 34 fixed to the collet body 4a supports the rear side in the axial direction. Also, the finger 12
The outer peripheral portion 20a of the overhanging portion 20 of the annular body 18 located on the axial front side is supported on the axial front side by the cover 35 fixed to the collet body 4a.

A cylindrical pressing body 24 is fitted on both ends of the collet body 4a so as to be slidable in the axial direction. An annular air chamber 25 is provided between the inner circumference of each pressing body 24 and the outer circumference of the collet body 4a. In order to supply pressurized air to the air chamber 25, an air passage 26 is formed in the collet body 4a and the spindle shaft 11, and the air passage 26 is connected to the compressor via a control valve (not shown). A seal 2 for preventing air leakage from the air chamber 25 is provided between the pressing body 24 and the collet body 4a.
7 is interposed.

A peripheral groove 24a is formed on the outer circumference of each pressing body 24.
Is formed, and the overhanging portion 20 of the annular body 18 is formed in the circumferential groove 24a.
The inner peripheral part of is fitted. Further, one end of the compression spring 33 is brought into contact with the end surface of each pressing body 24, the other end of the spring 33 on the axial rear side is brought into contact with the back ring 34, and the other end of the spring 33 on the axial front side is brought into contact. It is in contact with the cover 35.

When pressurized air is supplied to the air chamber 25, the pressing body 24 in front of the finger 12 moves axially forward, and the pressing body behind the finger 12 moves axially rearward. . Thereby, each pressing body 24
Presses the overhanging portion 20 of the annular body 18 in the other axial direction.
Then, the inner peripheral portion 20b of the protruding portion 20 is displaced in the other axial direction with the outer peripheral portion 20a as a fulcrum, and the protrusion portion 21 is displaced inward in the radial direction as the protruding portion 20 is displaced. As a result, the pushed portion 17 of each finger 12 is pushed by the protruding portion 21.
Is pressed inward in the radial direction, and each finger 12 moves inward in the radial direction. Further, when the supply of the pressurized air to the air chamber 25 is released, the pressing body 24 is moved in one axial direction by the elastic force of the spring 33, and the displacements of the overhanging portion 20 and the protruding portion 21 of the annular body 18 are restored. Each finger 12 is restored radially outward by the elastic force of the spring 31.

According to the above construction, after the glass fiber is wound around the tube 5, the annular body 18 is pressed by the pressing body 24, so that the protrusions 21 of the annular body 18 force each finger 12 inward in the radial direction. Even if the fingers 12 and the tube 5 are adhered by the binder, the tube 5 can be moved by releasing the adhesion.
Can be easily removed from the collet 4.

Further, when the supply of the pressurized air to the air chamber 25 is released, the pressing body 24 is moved in the axial direction by the spring 33 and restored to its original position, and the protrusion 21 of the annular body 18 is restored.
The pressing of the finger 12 by is released. As a result, the fingers 12 move radially outward due to the elastic force of the spring 31, so that the tube 5 can be held again.

Further, the amount of displacement of the protrusion 21 inward in the radial direction with respect to the amount of axial movement of the pressing body 24 can be set by the size of the annular body 18, and the apparatus can be made compact.

The present invention is not limited to the above embodiment. For example, the present invention can be applied to a collet device of a fiber winder other than glass fiber. Further, the present invention can be applied to a collet device provided with means for forcibly moving the fingers outward in the radial direction as described in the conventional example.
Further, the number of sections of the overhanging portion and the protruding portion due to the notches does not have to be the same as the number of fingers, as long as the protruding portion can be displaced inward in the radial direction by the axial displacement of the overhanging portion.

[0024]

According to the present invention, by forcibly moving each finger inward in the radial direction by the annular body, the adhesion between the finger and the tube can be released, and
Since the moving amount of each finger inward in the radial direction can be made uniform, the work of extracting the tube from the collet can be easily performed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a collet device according to an embodiment of the present invention.

FIG. 2 is a perspective view of an annular body according to an embodiment of the present invention.

FIG. 3 is a plan view of an annular body according to an embodiment of the present invention.

FIG. 4 is a rear view of an annular body according to an embodiment of the present invention.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a cross-sectional view of a collet device according to an embodiment of the present invention.

FIG. 7 is a perspective view of a finger according to an embodiment of the present invention.

FIG. 8 is a front view of a glass fiber winder according to an embodiment of the present invention.

[Explanation of symbols]

 1 Glass Fiber Winder 4a Collet Main Body 5 Tube 12 Finger 18 Annular Body 19 Center Hole 20 Overhanging Part 21 Projection Part 22 Notch 23 Notch 24 Pressing Body

Claims (1)

(57) [Scope of utility model registration request] 1. A collet device comprising a collet body and a plurality of fingers arranged on an outer periphery of the collet body, wherein the collet device holds a fiber winding tube by moving each finger radially outward. The annular bodies are arranged on both axial ends of the annular body, and each annular body has a projecting portion that projects radially outward from the central hole and a projecting portion that projects from the projecting portion in one axial direction. The protruding portion and the protruding portion are divided into a plurality of portions by a plurality of notches along the radial direction so that the protruding portion is displaced inward in the radial direction with the displacement of the protruding portion in the other axial direction. A collet device for a fiber winder, characterized in that a pressing body for pressing the protruding portion in the other axial direction is provided so that the fingers can be pressed to move inward in the radial direction. .