JPH06171829A - Bobbin chuck device of spinning winder - Google Patents

Abstract

PURPOSE:To provide the bobbin chuck device of a spinning winder in which a chuck piece can be surely broken away from the hollow of a bobbin even if the encroaching amount of the chuck piece of a bobbin holder is made more. CONSTITUTION:A spacer ring 21 and a chuck piece 22 are inserted into a rotary cylinder 51, and the chuck piece 22 consists of a first member 24 having first inclination surfaces 34, 35 and outer periphery surfaces 32, 33 in regard to a bobbin B and second members 23, 25 having a second inclination surface 28 engaged with the first inclination surfaces 34, 35 and an inner periphery surface 26 in regard to the rotary cylinder 51. These first and second members 23, 24, 25 are extendable/contractable diametrically by means of slits 30, 39, 40, and are connected to each other peripherally by means of connection portions 31, 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holder chuck device for mounting a bobbin on a rotating cylinder, which is used in a spinning winder for winding a yarn spun from a spinning machine at a high speed.

[0002]

2. Description of the Related Art As a bobbin chuck device of this kind of spinning winder, spacer rings and rubber rings are alternately arranged on the outer circumference of a rotating cylinder, and the rubber rings are radially expanded by compression through the spacer rings to cause the inside of the bobbin to expand. The one that chucks the circumference is common. However, the performance required for the bobbin chuck is becoming more severe with the recent increase in the speed of the take-up winder. Furthermore, the tendency toward large packaging is also remarkable. That is, due to the increase in centrifugal force due to the increase in speed and the large packaging, the force exerted by the unbalance of the bobbin or the package on the chuck portion is increasing at an accelerating rate. A strong holding force that prevents the bobbin from shifting in the circumferential direction against such a force is required for the chuck portion.
However, the one using the above-mentioned rubber ring has a limited holding force.

Therefore, a mechanical chuck has been used in which a chuck piece is swellable in the circumferential direction with a stoid cone having an inclined surface. Hereinafter, a bobbin chuck device of a spinning winder using a mechanical chuck will be described with reference to FIGS. 4 and 5.

In FIG. 4, the bobbin holder 1 has a structure in which a chuck portion 10 described below is provided on the outer periphery of a rotatable rotary cylinder 2. That is, the rotating cylinder 2 serves as a base material for holding the bobbin B, and is fixed to the drive shaft 3 by the rib 2A in the rotating cylinder 2. The drive shaft 3 is axially supported by a fixed cylinder 4 inserted in the rotary cylinder 2 via a bearing 5. In addition, a built-in motor is provided at the end of the drive shaft 3.
6 is attached. As described above, the rotary cylinder 2 is structured to be rotated at high speed by the built-in motor 6. In addition,
There is also a type of structure in which the rotating cylinder rotates with the rotation of the touch roller.

As shown in FIG. 5 (a) which is a sectional view of the chuck portion and FIG. 5 (b) which is a partially developed view thereof, the chuck portion 10 includes a stop ring 11, a slide cone 12 and The chuck piece 13 is a main component. The stop ring 11 has a hollow ring shape, an outer circumference 11A thereof supports the bobbin B, and an inner circumference 11B of the stop ring 11 is inserted into the rotary cylinder 2 and fixed thereto by bolts 14. The inner circumference of the stop ring 11 is a cavity 11
It is C, and the slide cone 12 described below can be incorporated therein. Further, as shown in FIG.
Square holes 11D for holding a chuck piece 13 described below are provided at equal intervals in the circumferential direction on the outer peripheral side of the stop ring 11. Next, the slide cone 12 has a hollow ring shape. The cone-shaped inclined surface 12A of the slide cone 12 is in sliding contact with the chuck piece 13, and the inner circumference 12B of the slide cone 12 is loosely fitted to the rotary cylinder 2. The slide cone 12 is normally moved to the right in the axial direction by a spring 15 so that the chuck piece 13 can be urged in the bulging direction.
By pushing in (provided at two circumferential positions that do not interfere with the bolt 14), it is possible to move counterclockwise against the spring 15 to the left in the axial direction. Next, the chuck piece 13 has a substantially rectangular shape and is held in the hole 11D so as to be bulged in the circumferential direction. As shown in FIG. 5B, the chuck piece 13
Are arranged at equal intervals in the circumferential direction (interval of πD / N when divided into N equal parts). The outer surface 13A of the chuck piece serves as the chuck surface of the bobbin B, and the inner surface 13B serves as the inclined surface 13B that is in sliding contact with the cone-shaped inclined surface 12A of the slide cone.

Returning to FIG. 4, the pressing of the slide key 16 will be described. A cylinder chamber 2B is formed in the base end of the rotary cylinder 2, and when compressed air is introduced from an air hole 3A passing through the center of the drive shaft 3 and passing through the rib 2A into the peripheral wall of the rotary cylinder 2, the piston 7 moves to the left. The slide key 16 is pushed to the left. As shown in FIG. 5, the slide key 16 is a unit for pressing one slide cone 12, and is arranged in series for the number of slide cones 12. When the right end is pressed, the entire slide key 16 is pressed. Becomes When compressed air is not introduced from the air holes 3A, the slide key 16 is the slide cone 12
It is pushed to the right by the spring 15 via. The piston 7 is located to the right due to the repulsive force of these springs 15.

The bobbin chuck device of the above-described conventional take-up winder operates as follows. First, in FIG.
Compressed air is introduced into the cylinder chamber 2B, and the piston 7, that is, the slide key 16 is pushed leftward. In FIG. 5, the slide cone 12 is pushed by the slide key 16 and moves leftward. And the inclined surface 13 of the chuck piece
A gap is created between A and the cone-shaped inclined surface 12A of the slide cone, the chuck piece 13 can fall into the hole 11D, the chuck is opened, and the bobbin B is inserted from a bobbin mounting device (not shown). At this time,
Since the chuck piece 13 can fall into the hole 11D, the bobbin B is mounted by sliding on the stop ring 11. Then, when the compressed air in the cylinder chamber 2B is released, the repulsive force of the spring 15 is transmitted to the piston 7 via the slide key 16 and the piston 7 moves to the right, and as a result, the slide key 16 for the slide cone 12 in FIG. Is released. Therefore, due to the repulsive force of the spring 15, the slide cone 12 moves to the right, and the inclined surface 13A of the chuck piece is pushed up by the cone-shaped inclined surface 12A of the slide cone, so that the chuck piece 13 bulges in the circumferential direction and the bobbin B Chuck. That is, the repulsive force of the spring 15 becomes the chucking force of the bobbin B. Then, the rotational force of the rotary cylinder 2 is transmitted to the bobbin B so that the yarn is wound.

[0008]

In the bobbin chuck device of the take-up winder described in the prior art, as shown in FIG. 6, the chuck pieces 13 are arranged at equal intervals in the circumferential direction.
Since the inner surface of the bobbin B is chucked, the surface pressure of the chuck portion is increased. Further, in order to cope with high speed and large packaging, the spring 15 is strengthened and the chuck piece 13 is digged into the inner surface of the bobbin B to secure a strong holding force. However, since the recess 17 is formed on the inner surface of the bobbin B, even if the slide cone 12 moves leftward, the bobbin B on which the package is wound cannot be removed unless the chuck piece 13 is separated from the recess 17. . By the way, the upper chuck piece 13 has its own weight W.
Since it works in the direction away from the recess 17, it is easy to separate from the recess 17. However, the lower chuck piece 13
On the contrary, since the self-weight W works on the side of the recess 17, the recess 17 is likely to be caught in the recess 17. As a result, there is a problem that a problem that the bobbin B cannot be taken out often occurs.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to make the chuck piece bobbin even if the amount of bite of the chuck piece of the bobbin holder is large. An object of the present invention is to provide a bobbin chuck device for a take-up winder that can be reliably separated from the hollow.

[0010]

In order to achieve the above object, a bobbin chuck device of a take-up winder according to the present invention has a rotating cylinder in which a spacer ring and a chuck piece are inserted, and the chuck piece is a bobbin. A first member having an outer peripheral surface with respect to and a first inclined surface, and an inner peripheral surface with respect to the rotating cylinder and the first member.
A second member having a second inclined surface that engages with the inclined surface, and the first and second members are substantially connected in the circumferential direction so as to be expandable and contractible in the radial direction.

[0011]

When the first and second members with which the first inclined surface and the second inclined surface are engaged with each other are pushed together, the first member expands its diameter to grip the bobbin, and the second member contracts to reduce the diameter of the bobbin holder. Hold the
The bobbin is firmly gripped by the rotating cylinder. When the first and second members are released from each other, they are substantially connected in the circumferential direction and retain the original state of being inserted into the rotating cylinder by elastic return or the like, and the first member falls by its own weight. There is no.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B are views showing a main part of a bobbin chuck device according to the present invention. FIG. 1A is a partial sectional view, FIG. 1B is a side sectional view of a left second member, and FIG. 1 is a side view of the member, and FIG. 6D is a side sectional view of the right second member. Figure 2
FIG. 3 is a cross-sectional view showing a chucked state of a main part of the bobbin chuck device, which corresponds to the released state of FIG.

In FIG. 1, the bobbin chuck device 20 is shown.
Is a spacer ring 2 inserted on the outer circumference of the rotary cylinder 51.
1 and a chuck piece 22. The chuck piece 22 includes a left second member 23, a first member 24, and a right second member 25. A large number of bobbin chuck devices 20 are inserted in series in the rotary cylinder 51, and the bobbin B is gripped by the rotary cylinder 51 by pushing and pulling the entire series body in the axial direction. There is.

In FIGS. 1B and 1D, the left second member 23 and the right second member 25 have a bilaterally symmetrical shape, which will be described at the same time. The second members 23 and 25 are rings having an inner peripheral surface 26 that is inserted and attached to the outer periphery of the rotary cylinder 51, and a recess 27, a second inclined surface 28, and a step portion 29 are provided on the outer peripheral side. ing. The concave portion 27 is partitioned by the convex portion 27a,
A tapered surface 27b is provided to facilitate the fitting of the protrusion 27a into the protrusion 42 of the spacer ring 21. Further, the second members 23 and 25 are integrally molded of a thermoplastic resin which is rich in elastic stability like polyacetal and easy to mold. Furthermore, the slits 30 extending to at least the second inclined surface 28 are formed in the rings of the second members 23 and 25.
18 are provided at equal distribution circles (every 20 °). That is, when the portion of the second inclined surface 28 is pushed, the slit 3
The opening of 0 narrows and the inner peripheral surface 26 contracts. And
When the portion of the second inclined surface 28 is no longer pressed, the opening of the slit 30 is restored due to the elastic return, and the rotating cylinder 51
It will be loosely fitted in. The second members 23 and 25 are circumferentially connected by the circumferential connecting portion 31 not covered by the slit 30. The circumferential connecting portion 31 may be one that substantially holds the circumferential coupling, and one portion of the slit 30 may completely penetrate in the axial direction to form a crack. Even if there is only one through slit,
It is expandable and contractible. Further, the second members 23 and 25 may be divided into a large number in the circumferential direction and connected in the circumferential direction by an elastic member such as a spring.

In FIG. 1 (c), the first member 24 has left and right outer peripheral surfaces 32 and 33 which are inserted and attached to the inner circumference of the bobbin B.
A left side first inclined surface 34 that contacts the first inclined surface 28 of the left side second member 23, and a right side second member 2
No. 5, the right side first inclined surface 35 in contact with the first inclined surface 28, and the left side contact portion 36 hooked on the step portion 29 of the left side second member 23.
And a right-side contact portion 37 hooked on the step portion 29 of the right-side second member 25, and a thin portion 38. Also, the second
The members 23 and 25 are integrally molded of a thermoplastic resin which is rich in elastic stability like polyacetal and easy to mold. In addition, the ring of the first member 24 includes
Slits 39, 40 that reach the central portion beyond the inclined surfaces 34, 35 are provided at an angle of 15 ° so that they do not overlap each other in equal distribution circles (every 20 °), and 18 slits are provided on each side. That is, when the portions of the first inclined surfaces 34 and 35 are pushed, the openings of the slits 39 and 40 become wider and the first
The diameter of the inclined surfaces 34 and 35 increases. Then, when the portions of the first inclined surfaces 34 and 35 are no longer pushed, the openings of the slits 39 and 40 are restored due to the elastic return. With the circumferential connecting portion 41 not covered by the slits 39 and 40, the first
The members 24 are connected in the circumferential direction. The circumferential connection portion 41 may also be one that substantially holds the circumferential connection, and one of the slits 39 and 40 may completely penetrate in the axial direction to form a crack. Even if there is only one through slit, it can be expanded and contracted. Further, the first member 24 may be divided into a large number in the circumferential direction and connected in the circumferential direction by an elastic member such as a spring.

In FIG. 1A, the spacer ring 21
Is a ring having a length corresponding to the length of the bobbin B and is made of, for example, aluminum. Protrusions 42 are provided at both ends of the spacer ring 21, and the second member 2
The concave portions 27 of 3, 25 are fitted into the convex portions 42 and are connected to the spacer ring 21. In addition, the second member 23,
By the step portion 29 of 25 and the left and right abutting portions 36, 37 of the first member being caught, the force for pulling the second member 23, 25 in the direction of arrow b is transmitted in order, and the first member is surely shown. It is designed to return to the reduced size.

The operation of the above bobbin chuck device will be described below. In FIG. 1A, when a compressive force in the pushing direction of a is applied between the spacer rings 21, the protrusion 42 of the spacer ring 21 and the recesses 27 of the second members 23 and 25 are fitted and connected, whereby the second member 23 is pressed. , 25 is reduced in distance L. Then, the left and right first inclined surfaces 34, 35 of the first member 24 engage with the second inclined surfaces 28 of the second members 23, 25, and the slits 39, 40 of the first member 24 and the second members 23, 25. Due to the presence of the slit 30 of the first member 24
The outer peripheral surfaces 32, 33 of the second member 23, 25 are expanded in diameter and pressed against the inner peripheral surface of the bobbin B, and the second inclined surfaces 28 of the second members 23, 25 are reduced in diameter, and the central portion of the inner peripheral surface 26 is reduced. 26a
Are pressed against the outer peripheral surface of the rotating cylinder 51. as a result,
The bobbin B is in the chuck state of FIG.

On the contrary, in FIG. 1A, when a pulling force in the b direction acts between the spacer rings 21, the convex portion 42 of the spacer ring 21 and the concave portion 27 of the second members 23 and 25 are formed.
Of the second member 23, 25 and the first step
The distance L between the second members 23 and 25 returns to the original length due to the contact connection of the contact portions 36 and 37 of the members. At the same time, the first
The left and right first inclined surfaces 34, 35 of the member 24 and the second member 2
The engagement of the second inclined surfaces of 3, 25 is also returned to the original state, the expanded state of the first member 24 is canceled and the reduced condition of the second members 23, 25 is canceled, and the first member 24 is also released. And the second member 2
The elastic return force of 3, 25 returns to the released state of FIG. In this state, the outer peripheral surfaces 32, 33 of the first member 24 are
Is within the outer diameter of the spacer ring 21, so that the bobbin B to be pulled out is not likely to be caught by the first member 24. Further, the inner peripheral surfaces 26 of the second members 23 and 25 also become larger than the outer diameter of the rotary cylinder 51, so that the spacer ring 21 and the chuck piece 22 smoothly slide in the axial direction. Further, the spacer ring 21 and the chuck piece 22 are connected in the pulling direction b, which ensures that all the chuck pieces 22 are in the released state.

Further, the main part of the bobbin holder to which the bobbin chuck device described above is applied will be described with reference to FIG. Figure 3
The upper cross section of Fig. 3 is in the released state, and the lower cross section of Fig. 3 is in the chucked state. Unlike the bobbin holder in FIG. 4, the piston 50 is provided on the tip side of the rotating cylinder 51, and the piston chamber 5
A rod 53 extending to the opposite side of 2 is connected to the cap 54. The cap 54 is inserted and attached to the tip of the rotary cylinder 51, and is fitted and connected to the chuck piece 22 by its convex portion 54a. Further, a disc spring 55 is interposed between the rotary cylinder 54 and the piston 50, and when the cylinder chamber 52 communicates with the atmosphere, the cap 54 is chucked by the urging force of the disc spring 53 as shown in the lower section. When the piece 22 is compressed into a chuck state and compressed air is introduced into the cylinder chamber 52, the cap 5 is overcome to overcome the biasing force of the disc spring 53.
4 pulls the chuck piece 22 into the released state as shown in the upper section.

The bobbin chuck device of the present invention is shown in FIG.
Not only the bobbin holder 1 of FIG. 4 but also the bobbin holder 1 of FIG. In this case, the chuck piece 13 of FIG.
The part corresponding to the half of the first member is used for the part, and the part corresponding to the left second member is used for the part of the slide cone 12. The stop ring 11 corresponding to the spacer ring and the fitting connection for the left second member are not required.

[0021]

According to the bobbin chuck device of the take-up winder of the present invention, the first and second members constituting the chuck piece are substantially connected in the circumferential direction so as to be expandable and contractible in the radial direction. Even when the first and second members are released from each other, they are connected in the circumferential direction and retain the original state of being inserted into the rotating cylinder by elastic return or the like, and the lower side of the first member is Since it does not drop by its own weight, the chuck piece can be reliably separated from the recess of the bobbin, and the occurrence of a trouble that the bobbin cannot be taken out can be prevented.

[Brief description of drawings]

FIG. 1 is a view showing a main part of a bobbin chuck device of the present invention.

FIG. 2 is a view showing a released state of a main part of the bobbin chuck device of the present invention.

FIG. 3 is a sectional view of a bobbin holder to which this bobbin chuck device is applied.

FIG. 4 is a cross-sectional view showing a structural example of a bobbin holder of a take-up winder.

FIG. 5 is a view showing a main part of a conventional bobbin chuck device.

FIG. 6 is a diagram showing a problem of a conventional bobbin chuck device.

[Explanation of symbols]

 21 spacer ring 22 chuck piece 23, 25 first member 24 first member 26 inner peripheral surface 28 second inclined surface 34, 35 first inclined surface 30 slit 31 circumferential direction connecting portion 32, 33 outer peripheral surface 39, 40 slit 41 circumference Directional connection 51 Rotating cylinder

Claims (1)

[Claims] 1. A spacer ring and a chuck piece are inserted into and attached to a rotating cylinder, the chuck piece having a first member having an outer peripheral surface for a bobbin and a first inclined surface, and an inner peripheral surface for a rotating cylinder and a first member. A second member having a second inclined surface that engages the inclined surface, and the first and second members are substantially connected in the circumferential direction so as to be expandable and contractible in the radial direction. Bobbin chuck device.