JP2002241054A - Bobbin holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bobbin holder capable of reliably holding a bobbin passed through a base part side and realizing the high-speed rotation. SOLUTION: In the bobbin holder which has a plurality of chucking members 13 provided on an outer circumference of a rotary cylinder 12 passing through a plurality of bobbins 11 and disposed from a base part to the distal end of the rotary cylinder 12, and holds the bobbins 11 passed through the rotary cylinder 12 by pressing and moving the chucking members 13 in the axial direction, respectively, the chucking members 13 are formed of cylindrical bodies, a plurality of notches are formed in the axial direction on both ends in the axial direction, a flexible part 25 which is deflected and expanded when pressed in the axial direction is formed in each space between the notches, and the flexible part 25 of the chucking member 13 on the base part side is deflected more than the flexible part 24 of the chucking member 13 of the distal end part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin holder used for a take-up winder or the like, and more particularly to a bobbin holder having an improved chuck member for holding a bobbin.

[0002]

2. Description of the Related Art As a bobbin holder used in a take-up winder or the like, a plurality of chuck members arranged along the axial direction are provided on the outer periphery of a rotating cylinder through which a bobbin is inserted. A so-called chuck piece type that grips a bobbin inserted through the outer periphery of a cylinder is known.

A conventional chuck piece type bobbin holder will be described with reference to FIGS. 6 and 7. FIG.

FIG. 6 is a cross-sectional view of the tip of the bobbin holder. The upper half shows a state in which the bobbin is released, and the lower half shows a state in which the bobbin is gripped. 7 is an enlarged cross-sectional view of the chuck member in FIG. 6, in which FIG. 7A shows a state where the bobbin is released, and FIG. 7B shows a state where the bobbin is gripped.

As shown in FIG. 6, a bobbin holder 40 is
A rotary cylinder 42 for inserting a plurality of bobbins 41 around its outer circumference, and a bobbin 4 inserted around the outer circumference of the rotary cylinder 42.
A chuck member 43 for gripping the chuck member 1 from the inside, a spacer member 44 provided between the chuck members 43,
The chuck member 43 and the spacer member 44 are
And a pressing member 45 for pressing and moving toward the base side (right side in the figure).

The rotary cylinder 42 has a base connected to a motor (not shown), and rotates the bobbin 41 while holding the bobbin 41 on the outer periphery thereof, thereby winding the yarn around the bobbin 41.

The chuck member 43 is a cylindrical member formed of an elastic body such as a synthetic resin provided on the outer periphery of the rotary cylinder 42 so as to be movable in the axial direction. A plurality of the chuck members 43 are arranged in the axial direction of the rotary cylinder 42. At both ends of the inner periphery of the chuck member 43,
A tapered slide surface 46 is formed (see FIG. 7).

The spacer member 44 includes a spacer ring 49 inserted around the outer periphery of the rotary cylinder 42 and a connection ring 50 for connecting the spacer ring 49 and the chuck member 43 in the axial direction. The connection ring 50 has a guide surface 51 that comes into contact with the slide surface 46 of the chuck member 43. When the chuck member 43 and the spacer member 44 are pressed and moved toward the base, the slide surface 46 of the chuck member 43 is moved to the guide surface. It moves radially outward along 51 and expands its diameter.

The pressing member 45 includes a piston 53 accommodated in the hollow portion 52 inside the rotary cylinder 42 so as to be movable in the axial direction.
And a pressing lid 55 connected to the piston 53 via a rod 54 and having an outer peripheral portion connected to the chuck member 43 at the distal end, and biases the piston 53 and the pressing lid 55 toward the base of the rotary cylinder 42. And a spring 56 to be used.
A compressed air supply means (not shown) is connected to the hollow portion 52 inside the rotary cylinder 42.

When the bobbin 41 is gripped by the bobbin holder 40, first, compressed air is supplied into the hollow portion 52 of the rotary cylinder 42 by compressed air supply means (not shown), as shown in the upper half of FIG. Then, the piston 53 and the pressing lid 55 are moved toward the distal end in opposition to the spring 56.

When the piston 53 and the pressing lid 55 move, the chuck members 43 and the spacer members 44 are pulled by the pressing lid 55 and move toward the distal end, so that the space between the spacer members 44 increases, and the chuck members 43 The sliding surface 46 slides along the guide surface 51 of the connecting ring 50 and is positioned radially inward (see FIG. 7A).

In this state, after the bobbin 41 is sequentially inserted from the distal end side of the rotary cylinder 42 to the base side, the compressed air in the hollow portion 52 is removed. When the compressed air is removed, the piston 53 and the pressing lid 55 move to the base side by the urging force of the spring 56,
Along with the movement, the chuck members 43 and the spacer members 44 are pressed and moved toward the base. When the chuck member 43 and the spacer member 44 are pressed and moved to the base side, as described above, the chuck member 43 moves radially outward along the guide surface 51 of the connection ring 50 and expands in diameter.
The outer peripheral surface of the chuck member 43 comes into strong contact with the inner peripheral surface of the bobbin 41 to grip the bobbin 41 on the outer periphery of the rotating cylinder 42 (see FIG. 7B).

[0013]

A problem with such a bobbin holder 40 is that the bobbin 41 inserted into the base of the rotary cylinder 42 is not securely held by the chuck member 43.

That is, since the chuck member 43 on the distal end expands its diameter before the chuck member 43 on the base side to grip the bobbin 41, the gripping force of the chuck member 43 on the distal side is reduced. In addition, the resistance of the movement of the spacer member 44 causes a problem that the chuck member 43 on the base side does not sufficiently expand in diameter, and the gripping force of the bobbin 41 is reduced as compared with the chuck member 43 on the distal end side.

Even if the gripping force of the bobbin 41 on the base side is small, since the bobbin 41 is pressed from the tip side toward the base side, it is fixed to the rotating cylinder 42 (there is no relative rotation). ). However, since there is a gap between the chuck member 43 positioned radially inward and the inner periphery of the bobbin 41, if the opening of the chuck member 43 is insufficient, the bobbin 41 is eccentric with respect to the rotary cylinder 42. It was grasped, which caused vibration.

In order to ensure that the bobbin 41 on the base side can be securely gripped, Japanese Utility Model Publication No. 8-5983 has been proposed.
There is known a bobbin holder as disclosed in Japanese Unexamined Patent Publication (Kokai) Publication.

The bobbin holder is provided on the outer circumference of the rotary cylinder.
A rubber ring is provided that is deformed in the radial direction when pressed in the axial direction, so that the rubber ring on the base side is easily deformed relative to the rubber ring on the distal end side.

However, in the rubber ring type bobbin holder, it is necessary to increase the thickness of the rubber ring in order to obtain a sufficient bobbin gripping force. Since the inner diameter of the bobbin is fixed, if the thickness of the rubber ring increases, the outer diameter of the rotating cylinder must be reduced, so the natural frequency cannot be increased, and it has not been possible to cope with high-speed rotation. .

An object of the present invention is to solve the above-mentioned problems and to provide a bobbin holder that can reliably hold a bobbin inserted through a base and can rotate at a high speed.

[0020]

In order to achieve the above object, the present invention comprises a plurality of chuck members provided on the outer periphery of a rotating cylinder through which a plurality of bobbins are inserted and arranged from the base to the tip of the rotating cylinder. Each of the chuck members is formed of a cylindrical body in a bobbin holder that holds the bobbin inserted through the rotary cylinder by pressing and moving the chuck members in the axial direction from the distal end side and bending the chuck members. A plurality of cuts are formed in the axial direction to form a flexible portion between each cut which bends and expands when pressed in the axial direction, and has a base portion with respect to the flexible portion of the chuck member on the distal end side. This makes the flexible portion of the chuck member on the side more flexible.

According to this, since the bobbin is gripped while being sequentially bent from the chuck member on the base side, all the bobbins can be gripped with an equal force, and the bobbin on the base side can also be reliably gripped.

The chuck member on the base side than the chuck member on the distal end side may be formed so as to have a large number of cuts and / or a long cut length so as to be easily bent.

Further, the chuck member on the base side of the chuck member on the tip side may be made of a flexible material so that the flexible portion is easily bent.

Further, the chuck members are connected between chuck members adjacent to each other in the axial direction of the rotary cylinder,
When the chuck member is pressed and moved to the base side of the rotating cylinder, a connecting member for bending the flexible portion of each chuck member to increase the diameter may be provided.

The present invention also includes a plurality of chuck members provided on the outer periphery of a rotary cylinder through which a plurality of bobbins are inserted and arranged from the base to the distal end of the rotary cylinder. In the bobbin holder that holds the bobbin inserted into the rotary cylinder by pressing and moving in the direction, the chuck member is formed of a cylindrical body, and its axial length is substantially equal to the axial length of the bobbin to be gripped. Equally formed, with each chuck member,
Along with gripping the corresponding bobbins, a plurality of cuts are formed in both ends in the axial direction of each chuck member in the axial direction, and a flexible portion which bends and expands when pressed in the axial direction between the cuts is formed. It is like that.

According to this, since the axial length of the chuck member is long, it is possible to change the flexibility of the chuck member, for example, to make a difference in the cut length between the chuck members on the base side and the distal end side. It will be easier.

Further, the chuck member at the most proximal side is formed so as to have a larger number of cuts and / or a longer cut length than the chuck member at the most distal end side, so that the flexible portion of the chuck member at the distal end side is formed. On the other hand, the flexible portion of the base-side chuck member may be more easily bent.

Further, the chuck member on the base side than the flexible portion of the chuck member on the distal end side is made of a flexible material so that the material of the flexible portion can be easily bent. The flexible portion of the chuck member may be more easily bent.

The chuck members are connected to each other between the chuck members adjacent to each other in the axial direction of the rotary cylinder, and when the chuck members are pressed and moved toward the base of the rotary cylinder, the flexible portions of the chuck members are moved. A connecting member for expanding the diameter by bending the member may be arranged.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view of a tip portion of a bobbin holder according to an embodiment of the present invention, in which an upper half shows a state where the bobbin is released and a lower half shows a state where the bobbin is gripped. FIG. 2 is a cross-sectional view of the bobbin holder base. The upper half shows a state where the bobbin is released, and the lower half shows a state where the bobbin is gripped. FIG. 3 is an enlarged sectional view of the chuck member and the shoe spacer in FIG. 1, and FIG.
3 shows a state in which the bobbin is released, and FIG. 3B shows a state in which the bobbin is gripped. 4 and 5 are schematic perspective views of the chuck member. FIG. 4 shows a chuck member arranged at a distal end portion, and FIG. 5 shows a chuck member arranged at a base portion.

As shown in FIGS. 1 and 2, the bobbin holder 10 has a rotating cylinder 12 for inserting a plurality of bobbins 11 on its outer periphery, and a plurality of bobbins 11 inserted on the outer periphery of the rotating cylinder 12. , A shoe spacer (connecting member) 14 provided between the chuck members 13, and the chuck member 13 and the shoe spacer 14 are pressed and moved toward the base side (the right side in the figure) of the rotating cylinder 12. And a pressing member 15 for performing the operation.

The rotary cylinder 12 has a drive shaft 1 connected to a motor (not shown) with a rib 12a provided therein.
6 fixed. The drive shaft 16 is rotatably supported via a bearing 18 in a fixed cylinder 17 inserted into the rotary cylinder 12. Rotating cylinder 1 with a plurality of bobbins 11
By rotating while holding the bobbin 11 on the outer periphery of the bobbin 11,
The yarn spun by the spinning machine is wound around the outer periphery. In the present embodiment, eight bobbins 11 are inserted from the tip to the base of the rotary cylinder 12.

The chuck member 13 is an elastic cylindrical body made of a synthetic resin or the like provided on the outer periphery of the rotary cylinder 12 so as to be movable in the axial direction. A plurality of the chuck members 13 are arranged along the axial direction of the rotary cylinder 12. The elastic cylindrical body 13 is formed so that its axial length is equal to or slightly shorter than the axial length of the bobbin 11, and each elastic cylindrical body 13 grips one corresponding bobbin 11. Therefore, in the present embodiment, eight rotary cylinders 12 are provided from the tip to the base.

At both ends of the inner peripheral surface of the elastic cylindrical body 13, as shown in FIG. 3, there are tapered slide surfaces 19 which are inclined from the end to the inside in the radial direction toward the inside in the axial direction. Is formed. On the inner peripheral surface of the elastic cylinder 13, there is formed a projection 20 which comes into contact with the outer periphery of the rotating cylinder 12 and guides the movement of the elastic cylinder 13 in the axial direction.

A groove 21 extending in the circumferential direction is formed at a position separated by a predetermined distance L from both ends of the outer periphery of the elastic cylindrical body 13, and an elastic ring 22 made of rubber or the like is formed in the groove 21.
Is housed.

As shown in FIGS. 4 and 5, a plurality of slits (cuts) 23 extending inward in the axial direction from the ends are provided in both ends of the elastic cylindrical body 13 in the circumferential direction. A flexible portion 25 is formed between the slits 23 to bend and expand when the elastic cylindrical body 13 is pressed in the axial direction. Therefore, the slide surface 19 is formed at the end of the inner peripheral surface of the flexible portion 25. The groove 21 is formed on the outer peripheral surface of the flexible portion 25.

The slit 23 constitutes a flexibility changing means for changing the flexibility of the flexible portion 25 of the elastic cylinder 13.

That is, when the number of the slits 23 in the circumferential direction of the elastic cylindrical body 13 is increased, the width of the flexible portion 25 is reduced and the flexible portion 25 is easily bent. Conversely, if the number of slits 23 is reduced, the flexible portion 25 is less likely to bend. In addition, when the length of the slit 23 is increased, the free length of the flexible portion 25 is increased, and the flexible portion 25 is easily bent.

According to the present invention, by changing the number and / or length of the slits 23 of the elastic cylindrical body 13 in this way, the elastic cylindrical body 1 on the base side can be changed with respect to the elastic cylindrical body 13 on the distal end side.
No. 3 is more easily bent. In this embodiment,
As shown in FIGS. 4 and 5, four slits 23 are formed in the elastic cylinder 13 at the forefront (see FIG. 4), and the number of the slits 23 is sequentially increased by two toward the base side. I have. Therefore, 18 slits 23 are formed in the elastic cylinder 13 at the bottom (see FIG. 5).

Further, in the present embodiment, the length of the slit 23 is formed so as to gradually increase from the elastic cylinder 13 at the most distal end toward the elastic cylinder 13 on the base side.

As described above, by sequentially increasing the number of slits 23 and / or sequentially increasing the length of the elastic cylinder 13 on the base side with respect to the elastic cylinder 13 on the distal end side,
The flexible portion 25 of the elastic cylinder 13 on the base side is easily bent with respect to the flexible portion 25 of the elastic cylinder 13 on the distal end side.

The number and length of the slits 23 are not limited to the present embodiment, but are appropriately set in consideration of the material of the elastic cylindrical body 13 and the like.

Next, the shoe spacer (connecting member) 14
Is disposed between the adjacent elastic cylinders 13 and the rotating cylinder 1
The ring body is provided so as to be movable in two axial directions.
At both ends of the outer peripheral surface of the shoe spacer 14, concave portions 26 are formed, and the concave portions 26 are engaged with the inner end of the slide surface 19 of the elastic cylindrical body 13 so that all the elastic cylindrical bodies 13 Are connected in the axial direction (see FIG. 3A).

On the outer peripheral surface of the shoe spacer 14,
A guide surface 27 that contacts the slide surface 19 of the adjacent elastic cylinder 13 is formed. When the elastic cylindrical body 13 and the shoe spacer 14 are pressed and moved toward the base side of the rotating cylinder 12, the slide surface 19 moves radially outward along the guide surface 27 of the shoe spacer 14, and the flexible portion 25 is moved. It bends and expands with the root as a fulcrum.

The pressing member 15 has a piston 31 housed in the hollow portion 30 inside the rotary cylinder 12 so as to be movable in the axial direction.
And a pressing lid 33 connected to the piston 31 via a rod 32 and having an outer peripheral portion connected to the elastic cylindrical body 13 at the tip, and attaching the piston 31 and the pressing lid 33 to the base side of the rotary cylinder 12. And a biasing spring 34.

Further, an air passage 35 connected to compressed air supply means (not shown) is formed inside the shaft 16, so that compressed air can be supplied to the hollow portion 30.

Next, the operation of the present invention will be described.

The bobbin 11 is provided by the bobbin holder 10.
First, compressed air is supplied into the hollow portion 30 through the air passage 35 by compressed air supply means (not shown), and as shown in the upper half of FIG.
Then, the pressing lid 33 is moved toward the distal end in opposition to the spring 34.

When the piston 31 and the pressing lid 33 move, each of the elastic cylinders 13 and the shoe spacers 14 are pulled by the pressing lid 33 and move to the distal end side.
3 and the shoe spacer 14 are widened, and the elastic cylinder 1
The third flexible portion 25 has its slide surface 19 slid along the guide surface 27 of the shoe spacer 14 to be positioned radially inward (see FIG. 3A). At this time, the biasing force acting inward in the radial direction by the elastic ring 22 is applied to the slide surface 1.
Assist 9 slides.

Next, in this state, after a plurality of bobbins 11 are sequentially inserted from the distal end side of the rotary cylinder 12 to the base side, the compressed air in the hollow portion 30 is removed. When the compressed air is removed, the piston 31 and the pressing lid 33 move toward the base by the urging force of the spring 34, and the elastic cylinders 13 and the shoe spacers 14 are pressed and moved toward the base along with the movement. When the elastic cylinder 13 and the shoe spacer 14 are pressed and moved toward the base, the flexible portion 25 of the elastic cylinder 13 at the base is most easily bent.
The sliding surface 19 of the flexible portion 25 moves radially outward along the guide surface 27 of the shoe spacer 14 so that the flexible portion 25
Is bent and expanded, and strongly contacts the inner peripheral surface of the bobbin 11 to grip the bobbin 11.

Next, the flexible portion 25 of the elastic cylinder 13 disposed second from the base bends and expands to grip the bobbin 11.

As described above, the bobbin 11 is gripped by sequentially increasing the diameter from the flexible portion 25 of the elastic cylinder 13 on the base side toward the distal end. Therefore, the gripping force of the elastic cylindrical body 13 does not hinder the movement of the elastic cylindrical body 13 and the shoe spacer 14, and all the elastic cylindrical bodies 13 are sufficiently expanded to grip all the bobbins 11 with an equal force. be able to.

Therefore, the bobbin 11 on the base side can also be securely gripped, so that the bobbin 11 is not eccentrically fixed with respect to the rotary cylinder 12, so that generation of vibration can be prevented.

Although the flexibility changing means has been described as changing the number and / or length of the slits 23 formed in the elastic cylindrical body 13, the present invention is not limited in this respect. Several other methods can be applied.

For example, the material of the elastic cylinder 13 on the base side may be made of a material that is more flexible than the material of the elastic cylinder 13 on the tip side.

The flexibility may be changed by changing the thickness of the flexible portion 25 of the elastic cylindrical body 13.

Alternatively, the groove 2 for accommodating the elastic ring 22
The distance L from one end may be changed, or the above means may be combined. Further, the elastic force of the elastic ring 22 may be changed.

In the present embodiment, the elastic cylinder 13 has an axial length substantially equal to that of the bobbin 11, so that the flexibility can be easily changed. Since the chuck member 43 of the conventional bobbin holder 40 as shown in FIG. 6 has a short axial length, the length is limited even if a slit is to be formed, and it is difficult to make a difference in flexibility. is there. Further, even when the material is changed, the amount of change in the ease of bending is small. On the other hand, since the elastic cylindrical body 13 of the present embodiment has a long axial length, the length of the slit 23 can be sufficiently long, and when the material is changed, the flexibility easily changes. .

Further, in the present invention, since the chuck piece type is used, the thickness of the chuck member 13 can be made smaller than that of the rubber ring type, so that the outer diameter of the rotary cylinder 12 can be increased, and it is possible to cope with high-speed rotation.

In order to determine the order of inserting the elastic cylinders 13 having different flexibility of the flexible portion 25 into the rotary cylinder 12, for example, the elastic cylinders 13 may be numbered or the like. It is preferable to provide a mark such as changing the color. This prevents the operator from inserting the elastic cylinder 13 into the rotating cylinder 12 in the wrong order.

Further, it is preferable to change the ease of bending for each of the chuck members 13 from the front end to the base side, but in some cases, it may be changed for each of the plurality of chuck members 13.

[0063]

In summary, according to the present invention, the following excellent effects are exhibited. 1) All bobbins can be gripped with uniform and reliable force, and the bobbins on the base side can also be gripped reliably. 2) Applicable to high-speed rotation.

[Brief description of the drawings]

FIG. 1 is a sectional view of a distal end portion of a bobbin holder according to an embodiment of the present invention.

FIG. 2 is a sectional view of a base portion of the bobbin holder according to one embodiment of the present invention.

FIG. 3A is an enlarged cross-sectional view of a chuck member and a shoe spacer in a state where a bobbin is released. FIG. 4B is an enlarged cross-sectional view of the chuck member and the shoe spacer with the bobbin held.

FIG. 4 is a schematic perspective view of a chuck member arranged at a distal end portion.

FIG. 5 is a schematic perspective view of a chuck member arranged on a base.

FIG. 6 is a sectional view of a tip portion of a conventional bobbin holder.

FIG. 7A is an enlarged cross-sectional view of a chuck member of a conventional bobbin holder in a state where a bobbin is released. (B) It is an expanded sectional view of the chuck member in the state where the bobbin in the conventional bobbin holder was grasped.

[Explanation of symbols]

 11 bobbin 12 rotating cylinder 13 chuck member, elastic cylinder 14 shoe spacer 23 slit 25 flexible part

Claims (8)

[Claims] A chuck member is provided on the outer periphery of a rotating cylinder through which a plurality of bobbins are inserted, and a plurality of chuck members are arranged from a base to a tip of the rotating cylinder. In the bobbin holder that moves and bends to grip the bobbin inserted into the rotating cylinder, the chuck members are formed of a cylindrical body, and a plurality of cuts are formed in both ends in the axial direction in the axial direction to form the cuts. In between, a flexible portion that bends and expands when pressed in the axial direction is formed, and the flexible portion of the base-side chuck member is more easily bent relative to the flexible portion of the distal-side chuck member. A unique bobbin holder. 2. The bobbin holder according to claim 1, wherein the chuck member on the base side than the chuck member on the distal end side is formed so as to have a large number of cuts and / or a long cut length so as to be easily bent. . 3. The bobbin holder according to claim 1, wherein the chuck member on the base portion side of the chuck member on the distal end side is made of a flexible material so as to be easily bent. 4. The chuck member is connected between chuck members adjacent in the axial direction of the rotary cylinder,
The bobbin holder according to any one of claims 1 to 3, wherein a connecting member is provided for bending the flexible portion of each chuck member to expand its diameter when the chuck member is pressed and moved toward the base of the rotating cylinder. 5. A plurality of chuck members provided on an outer periphery of a rotating cylinder through which a plurality of bobbins are inserted and arranged in plural numbers from a base to a tip of the rotating cylinder, and each of the chuck members is axially pressed from a tip end side. In the bobbin holder for holding the bobbin inserted into the rotary cylinder by moving and bending, the chuck members are formed of a cylindrical body, and the axial length thereof is formed substantially equal to the axial length of the bobbin to be gripped. In each of the chuck members, a corresponding bobbin is gripped, and a plurality of cuts are formed in both ends in the axial direction of each chuck member in the axial direction. A bobbin holder characterized by forming a flexible portion. 6. The chuck member on the most proximal side than the chuck member on the most distal side is formed so as to have a larger number of cuts and / or a longer cut length. 6. The bobbin holder according to claim 5, wherein the flexible portion of the base-side chuck member is more easily bent. 7. The chuck member on the base side of the chuck portion on the distal end side is made of a material that is more flexible than the flexible portion of the chuck member on the distal end side, and the base portion side is closer to the flexible portion of the chuck member on the distal end side. 6. The flexible portion of the chuck member according to claim 5, wherein the flexible portion is more easily bent.
Or the bobbin holder according to 6. 8. While connecting the chuck members between chuck members adjacent in the axial direction of the rotating cylinder,
The bobbin holder according to any one of claims 5 to 7, further comprising a connecting member for bending a flexible portion of each chuck member to expand its diameter when the chuck member is pressed and moved toward the base of the rotary cylinder.