JPH01209278A - Bobbin tension device - Google Patents

Abstract

PURPOSE:To prevent the vibration during rewinding and the generation of winding collapse in a bobbin surely performed in its hold by engaging a spring material, which compresses an elastic member, with a cylindrical member holding the elastic member. CONSTITUTION:Drag members 2A-2E are divided into three small pieces in the peripheral direction, providing a compression coil spring to be embedded in a recessed part formed in each small spices of the drag members 2A-2E, and the compression coil spring urges elastic members 1A-1H so as to be compressed through cylindrical members 3A-3D. Consequently, no influence of sliding resistance of a rubber ring and the cylindrical members 3A-3D is received, and applying force acting uniformly on the elastic members 1A-1H, two or more bobbins 18A-18D can be surely held coaxially with a bobbin holder main unit 12. As the result, decreasing a level of vibration and noise of a rewinding machine and preventing inferiority of string quality and the core displacement of the bobbins 18A-18D during its rewinding, a package can be prevented from collapsing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bobbin holder tightening device in a winder that simultaneously winds a plurality of threads.

[Conventional technology]

Conventionally, an elastic body and a cylindrical member are movably attached to a bobbin holder body alternately, the elastic body is compressed in the axial direction, the elastic body is expanded in the radial direction, and the bobbin is tightly attached. A fastening device is used (U.S. Pat. No. 4,458
850 statement).

When the bobbin is gripped by this bobbin tensioning device, the elastic body is compressed, and the cylindrical member that engages with the elastic body is moved in the axial direction via the elastic body, and as a result, the elastic body is moved in the radial direction. It was being expanded.

[Problem to be solved by the invention]

That is, in such a conventional bobbin tightening device, compressed air from the cylinder is exhausted when the bobbin is tightened. As a result, the rubber rings and the cylindrical member inserted alternately into the bobbin holder main body are compressed by the force of the disc spring.

The rubber ring inserted into the back of the bobbin holder main body in this manner is compressed via the rubber ring at the tip and the cylindrical member.

Therefore, in addition to the sliding resistance between the bobbin holder body and the cylindrical member, the sliding resistance between the rubber ring and the bobbin holder body, and the sliding resistance between the rubber ring and the bobbin inner diameter, A force is applied to deform the rubber ring on the back side. Therefore, the force acting on the rubber ring on the tip side is greater than the rubber ring on the back side, and the rubber ring on the tip side deforms first than the rubber ring on the back side, causing the bobbin on the tip side to be gripped. . As a result, the rubber ring on the back side does not come into complete contact with the inner surface of the bobbin or the outer circumferential surface of the bobbin holder main body, resulting in a phenomenon that the gripping force of the bobbin is insufficient.

As a result, when the bobbin is gripped, the runout increases and vibrations occur, and the yarn being wound is squeezed between the contact roller and the yarn quality deteriorates due to looseness. During strip winding, the chuck part became eccentric due to the weight of the package, resulting in problems such as increased pickup and the package collapsing.

In particular, in recent years, winding machines have become larger in capacity and have multiple spindles, so the number of elastic bodies and cylindrical members used in one bobbin holder has increased. As a result, the above-mentioned problems such as insufficient bobbin gripping force and package collapse have become noticeable.

[Purpose of the invention]

The present invention solves the above-mentioned problems and securely grips the bobbin, thereby preventing vibrations during winding and unwinding of the package. The purpose of the present invention is to provide a bobbin tightening device for improving the bearing life, safety, and thread quality.

[Means to solve the problem]

The present invention achieves the above object by having an elastic body and a cylindrical member movably attached to a bobbin holder main body, and compressing the elastic body in the axial direction and expanding it in the radial direction to grip the inside of the bobbin. This is achieved by a bobbin tightening device in which a spring member that compresses the elastic body is engaged with a cylindrical member that sandwiches the elastic body.

Note that a piston that is slidably mounted in a recess formed on the tip side of the bobbin holder body is biased by a spring such as a disc spring, and the elastic body on the tip side of the bobbin holder body is compressed. When connected to a cap, in order to compensate for the fact that the acting force of a spring such as a disc spring differs between the front end and the back of the bobbin holder body, the strength of the spring material that compresses the elastic body must be adjusted to the bobbin holder body. It is preferable that the tip side and the back side are different.

On the other hand, in the case where a piston slidably gt@ in a recess formed on the tip side of the bobbin holder body is directly connected to a cap that compresses the elastic body on the tip side of the bobbin holder body among the elastic bodies. Alternatively, the strength of the spring material that compresses the elastic body may be the same on the front end side and the back side of the bobbin holder main body.

[For production]

In the present invention, a spring material is engaged with cylindrical members that sandwich the elastic body, and the elastic body is compressed by the spring material.

Therefore, the force is not affected by the sliding resistance of the rubber ring or the cylindrical member, and the force acts uniformly on the plurality of elastic bodies, making it possible to reliably grip the plurality of bobbins, so that the bobbins can be held in the bobbin holder. This reduces the level of imaging, reduces the noise of the winder, prevents the bobbin from being misaligned during one winding, and prevents the package from collapsing.

[Solid line example]

The present invention will be explained below based on the drawings. Figures 1 and 2
The figure and FIG. 3 show an embodiment of the present invention, in which four bobbins are tightly attached.

In FIG. 1, the bobbin holder main body 15 is a bearing I.
It is rotatably supported by the winder housing 11 by OA and IOB.

A cylindrical member 16 is fixed to the cylindrical portion 15a of the bobbin holder main body 15 on the housing 11 side with a port 17, and an elastic body IH extends from there toward the tip side.

Cylindrical member 3D, elastic body 1G, cylindrical member 20C, elastic body 1
F, cylindrical member 3C1 elastic body 1E, cylindrical member 20B, elastic body 1D1 cylindrical member 3B, elastic body 1C1 cylindrical member 2OA,
The elastic body 1B, the cylindrical member 3A, and the elastic body 1A are sequentially inserted so as to be movable in the axial direction.

The mouth-shaped portions 1a formed at the bases of the elastic bodies 1A-1H engage with single-shaped grooves formed at the ends of the respective cylindrical members 3A-3D, 20A-20C116.

When the bobbin is tightened, the shoulder portion 1b of the elastic body 1 and the conical portions 3a, 20a, 4a of the cylindrical member 3.20 or the cap 4 slide in the axial direction acting on the elastic body 1 in FIG. 1-a. The compressive force causes the elastic body 1 to expand outward in the radial direction. As a result, an axial groove 1d is formed in the elastic body 1 over almost the entire circumference in the circumferential direction, as shown in FIG. 1-a, and the elastic I*1 that opens when the grip is loosened is expanded. We make it easy to do. (In some cases, the groove 1d may not be provided.) The distal end circumferential surface 1C of the conical portion of the elastic body 1 engages with the inner circumferential surface of the bobbin 18 to grip the bobbin 18.

The tension members 2A to 2 are slidable along the cylindrical portion 158 of the bobbin holder main body 15 so as to be coaxial with the elastic bodies 1A to 1H and inscribed in grooves formed inside the elastic bodies 1A to 1H. It is provided.

The tension members 2A to 2 have a U-shaped cross section as shown in FIG. 3A-3D, 20
It is fitted between the grooves formed on the inner circumferential surfaces of A to 20G and 16.

The other flange 2a of the tension members 2A to 2 is attached to the cap 4.
, are movably inserted into annular grooves formed in the inner peripheral surfaces of the cylindrical members 3A to 3D and 20A to 20C.

The tension members 2A to 2E are divided into three small pieces in the circumferential direction, and a compression coil spring 21 is embedded in a recess formed in each of the small pieces of the tension members 2A to 2E.
1 biases the elastic body 1 through the cylindrical member 3 so as to compress it.

A recess 15 extending in the axial direction at the tip of the bobbin holder body 15
c is formed to form a cylinder cavity.

A piston 5 is slidably mounted in a sealed manner within the cylinder base 15c via an O-ring 6.

A disc spring 7 is installed between a ring 8 screwed inside the recess 15c of the bobbin holder main body 15 and the piston 5.

Further, at the tip of the bobbin holder main body 15, a cap 4 is provided for compressing the elastic body IA to 1 by receiving the force of the disc spring 7.
is provided so as to be movable in the axial direction of the bobbin holder main body 15.

The piston 5 and the cap 4 are connected by a rod 9, and the tip of the rod 9 is screwed with a nut 9a.

The piston 5 has a hole 15b formed in the cylinder body 15.
It is actuated by compressed air supplied through the shaft and moves in the axial direction.

When loosening the grip on the bobbin 18, hold the bobbin holder body 1
Pressurized air is supplied from the rear through the hole 15b of No. 5, enters the cylinder air 15c, and moves the piston 5 to the left in FIG. As a result, the disc spring 7 is compressed and the cap 4 moves to the left, pulling the cylindrical member 3A engaged with the flange 2a of the tension member 2A to the left, compressing the compression coil spring 21, and moving the cap 4 to the left. The cylindrical member 3A is maintained at a predetermined distance regulated by the distance between the flanges 2a and 2b of the tension member 2A. Similarly, the tension members 2A are used to maintain the spacing between the cylindrical members and loosen the elastic bodies 1A to 1H (see FIG. 2).

In addition, in this example, as shown in FIG. 2, a slight gap as shown by Y is formed between the tension member 2A and the cylindrical member 3A at the rightmost end, thereby reducing the accumulation of machining errors. I try to absorb it.

When gripping the bobbin, the pressurized air supplied from the rear of the bobbin holder body 15 is cut off, and the hole 15b of the bobbin holder body 15 is
The compressed air in the cylinder chamber 15C is removed through the cylinder chamber 15C, and the piston 5 is moved to the right by the spring force of the disc spring 7. When the piston 5 moves to the right, the cap 4 connected to the piston 5 by the rod 9 moves to the right, and when the tension member 2 is loosened, the compression coil spring 21 expands and compresses the elastic bodies 1A to 1H. 1A to 1H expand in the radial direction to grip the inside of the bobbin 18. The elastic body expanded by the compression coil spring 21 is further compressed by the disc spring 7 to increase the gripping force.

In the above examples, all elastic bodies having the same shape were used. However, in this way, the piston, which is slidably installed in the recess formed on the tip side of the bobbin holder body, is biased by a spring such as a disc spring, and the elastic body on the tip side of the bobbin holder body When the body is connected to a cap that compresses the body, the strength of the spring material that compresses the elastic body must be adjusted to compensate for the fact that the acting force of a spring such as a disc spring is different between the front end and the back of the bobbin holder body. The length may be made different between the tip side and the back side of the bobbin holder main body. In other words, when installing the elastic body, the shape of the elastic body changes depending on the position,
The mechanical properties of the elastic body may also be changed. For example, as shown in FIG. 3, grooves 1S are formed on the circumferential surface of the elastic body, and the number of grooves 18 for the elastic body attached to the front end of the bobbin holder main body 15 is increased in order, and the number of elastic grooves 18 attached to the back side is increased in order. The body may be made easier to expand.

Further, in the above embodiment, the compression coil springs 21 having the same strength are engaged with the elastic body 1 as spring materials, but the spring materials may be made stronger in order from the tip side toward the back side.

In addition, unlike the above-mentioned embodiments, the piston, which is slidably mounted in a recess formed on the distal end side of the bobbin holder main body, is directly connected to the cap that compresses the elastic body on the distal end side of the bobbin holder main body. In this case, the strength of the spring material that compresses the elastic body may be the same on the front end side and the back side of the bobbin holder main body.

In the above embodiment, the tension member was divided into three parts in the circumferential direction.
It may be integrated.

In the above embodiment, one end of the tension member 2 is connected to the elastic body 1.
However, as shown in FIG. 4, an axial clearance Q may be provided to provide a degree of freedom in the axial direction.

The shape of the elastic body is not limited to that of the above embodiment, but the shape of the elastic body is
Various shapes as shown in Figures-a-d, namely, right cylindrical shape (Figure 5-a), dogleg-shaped cross section (Figure 5-b), and X-shaped cross-section (Figure 5-C) , an inverted V-shaped cross section (FIG. 5-d), etc.

The tension member may also serve as a bearing material for the cylindrical member as shown in FIG.

In the above embodiment, compression coil springs 21 are used in all tension members.
Although the bobbin is embedded therein, the bobbin may be sufficiently gripped by the disk spring 7 without using a compression coil spring on the tip side. Further, instead of the compression coil spring, a tension coil spring, a disc spring, a wave washer, a rubber material, a plate spring, a torsion spring, etc. may be used. Alternatively, the tension member may be used as an elastic body in combination with a spring material.

(Effects of the Invention) In the present invention, a spring material is engaged with cylindrical members that sandwich the elastic body, and the elastic body is compressed by the spring material.

Therefore, the force is not affected by the vibration resistance of the rubber ring or cylindrical member, and force acts uniformly on multiple elastic bodies, making it possible to reliably grip multiple bobbins. It is possible to reduce the level of gripping and imaging, prevent poor yarn quality, reduce noise from the winding machine, and prevent the package from collapsing due to eccentricity of the bobbin during winding.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a state in which the bobbin is gripped in an embodiment of the present invention, FIG. 1-a is a detailed cross-sectional view of the elastic body and the tension member, and FIG. 3 is a perspective view showing details of the elastic body, and FIGS. 4, 5-a to 5-d, and 6 are sectional views showing embodiments of the pond of the present invention. . 1... Elastic body, 2... Tension member, 3...
・Cylindrical member, 15...Bobbin holder body, 21・
・Spring material.

Claims (1)

[Claims] 1. An elastic body and a cylindrical member are movably attached to the bobbin holder main body, and the elastic body is compressed in the axial direction and expanded in the radial direction to grip the inside of the bobbin. 1. A bobbin tensioning device, characterized in that a spring member for compressing the elastic body is engaged with a cylindrical member sandwiching the elastic body. 2. A bobbin fastening in which a plurality of elastic bodies and a cylindrical member are movably attached to the bobbin holder body, and the elastic bodies are compressed in the axial direction and expanded in the radial direction to grip the inside of the bobbin. In the device, a recess is formed on the front end side of the bobbin holder main body, a piston is slidably mounted in the recess, the piston is biased by a spring, and one of the elastic bodies is placed on the front end side of the bobbin holder main body. are connected to a cap that compresses the elastic bodies, and spring members that compress the elastic bodies are respectively engaged with cylindrical members that sandwich the plurality of elastic bodies, and the strength of the spring members is the same as the tip of the bobbin holder main body. A bobbin tensioning device characterized by being different on the side and back sides. 3. A bobbin fastening in which a plurality of elastic bodies and a cylindrical member are movably attached to the bobbin holder body, and the elastic bodies are compressed in the axial direction and expanded in the radial direction to grip the inside of the bobbin. In the device, a recess is formed on the front end side of the bobbin holder body, a piston is slidably installed in the recess, and the piston is attached to a cap that compresses the elastic body on the front end side of the bobbin holder body. The plurality of elastic bodies are connected to each other, and spring members that compress the elastic bodies are respectively engaged with cylindrical members that sandwich the plurality of elastic bodies, and the strength of the spring members is substantially equal to the strength of the spring members at the tip side and the back side of the bobbin holder main body. A bobbin fastening device characterized by being identical.