JP2002129436A - Braking device for spindle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a braking device for a spindle designed to surely apply braking pressure onto the spindle and also raise the abrasion resistance of the spindle. SOLUTION: This braking device for a spindle mounted with a brake shoe, having a brake lever acting to butt or set the brake shoe against or apart from the barrel of the spindle and functioning to brake the spindle by pressing the brake shoe via the brake bar against the barrel of the spindle, is characterized by that the brake shoe 9 is made of a rigid resin and the brake lever 8b is provided with grips 8g and 8g functioning to receive the brake shoe 9 through elastic deformation in mounting it and grip it by restorative force after received it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake device for a spindle installed in a spindle of a ring spinning machine, a ring twisting machine or the like.

[0002]

2. Description of the Related Art Conventionally, as a spindle brake device, a clamping type described in Japanese Utility Model Publication No. 63-6221 is known. In this brake device, the fulcrum of operation of the brake lever is arranged so as to sandwich the spindle, and when the brake lever is raised, the brake shoe support pieces arranged on both sides of the spindle body,
The brake shoes, which are tilted inward by the pushed-up brake levers, are fixed to the brake shoe support pieces so as to clamp both sides of the body of the spindle lobe to apply braking to the rotating spindle.

As an improvement, there is a brake device for a spindle described in Japanese Patent Application Laid-Open No. H10-168676. In this brake device, an operating fulcrum of a movable component is arranged at a position sandwiching the spindle, and a brake shoe is attached to a surface of the movable component facing the spindle.

The brake shoe is formed in an arc shape so as to engage with the body of the spindle warp. When the brake lever provided on the movable part is operated to be lowered, the movable part rotates, and the brake shoe is rotated by the spindle shoe. A wide area is contacted with the torso to apply braking.

[0005] In the above-mentioned brake device in which a brake shoe is attached to a movable part to directly press the body of a spindle wobble, it is possible to eliminate one-sided operation of the brake and to use a fly wool, There is also an advantage that dust hardly accumulates. However, since the braking is applied to the spindle at one place, the wear of the brake shoe becomes faster as compared with the above-described clamping type brake device. Therefore, there is a demand for improving the wear resistance of brake shoes.

[0006]

The above-mentioned brake shoe is a replacement part, and is usually formed from a resin molded product. On the other hand, the movable part is formed by pressing a thick plate.

[0007] Therefore, in order to be able to attach the brake shoe to a non-flexible movable part with one touch, the brake shoe is conventionally elastically deformed at the time of attachment.

More specifically, for example, a concave groove is formed in the brake shoe, and a convex ridge is formed on the movable component side so as to be able to engage with the concave groove. Is to accept. Since the brake shoe is required to be elastically deformed, the hardness of the brake shoe cannot be increased.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems in the conventional brake device for a spindle, and it is an object of the present invention to reliably apply a braking pressure to a spindle and to increase the wear resistance of a brake shoe. The present invention is to provide a spindle brake device that can be used.

[0010]

According to the present invention, there is provided an operating body for mounting a brake shoe and bringing the brake shoe into contact with or away from a spindle body, and connecting the brake shoe to the spindle via the operating body. In a spindle brake device that brakes a spindle by pressing against a body, the brake shoe is made of a hard resin, and the operation body is elastically deformed when the brake shoe is mounted, and receives the brake shoe. This is a spindle brake device including a gripper for gripping the brake shoe by a restoring force.

Specific examples of the hard resin include a phenol resin having abrasion resistance, heat resistance, and dimensional stability required for a braking material or a phenol resin impregnated with a reinforcing material.

According to the present invention, a hard resin having no flexibility can be selected as the brake shoe.
The wear resistance can be increased, and the brake shoe can be easily attached to the operating body.

Further, in the present invention, the grip portion can be formed on a free end side of a cantilever plate provided on the operating body. The cantilever plate-like piece is provided with an operating fulcrum so as to sandwich the spindle, and can be formed by cutting out a part of a brake lever that swings around the operating fulcrum.

The operating body is not limited to the brake lever formed by press-molding a thick plate, but may be formed of a flexible resin molded product. In this case, the grip portion can be elastically deformed by utilizing the flexibility of the resin. In addition, it is preferable to form the grip portion integrally with the resin molded product because the manufacturing cost can be reduced.

In the present invention, when the operating body is constituted by a press-formed product or a resin-formed product, an operating fulcrum is arranged so as to sandwich the spindle, and the operating body swings around the operating fulcrum as a rotation center; And an eccentric cam provided on the movable body. According to this configuration, by rotating the eccentric cam, the main body is displaced to a position where it can be brought into contact with the body of the spindle, and the brake shoe can be pressed against the body of the spindle.

An example of the flexible resin molded product is an engineering plastic in which a thermoplastic resin is reinforced with glass fibers.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 is an exploded perspective view showing a first embodiment of a spindle brake device according to the present invention.

In FIG. 1, a spindle wave 2 is fitted to a lower portion of a spindle 1 and is rotatably supported by a bolster 3. A flange 4 is integrally formed on the upper part of the bolster 3. The bolster 3 is inserted into a mounting hole 5 a of the spindle rail 5, and
A tightening nut 6 is screwed into the screw portion 3a formed on the upper side from the lower surface side of the spindle rail 5, and the spindle rail 5 is connected to the flange portion (the bottom portion of the spindle) 4 and the tightening nut 6.
Thus, the spindle mechanism is assembled by sandwiching and fixing the spindle mechanism. In addition, the flange portion 4 is provided with fulcrum slots 7, 7 which engage with a fulcrum shaft of a brake lever described later.

The spindle brake device 8 includes a brake lever 8b as an operating body which swings in the direction of arrow A about fulcrum shafts 8a, 8a (only the near side is shown) as operating fulcrums, and a spindle of the brake lever 8b. And a brake shoe 9 attached to the side.

The brake lever 8b has an upper plate 8c to which an arc-shaped brake shoe 9 is attached, and a pair of legs 8d, 8d (only the near side is shown) is suspended from the upper plate 8c. The brake shoe 9 is held at a position away from the spindle worm 2 in a state where the legs 8d, 8d are in contact with the spindle rail 5. Also, 8e
Reference numeral denotes an operating portion extending in a U-shape from the upper plate portion 8c.

FIG. 2 is an enlarged view of the spindle brake device 8. FIG. 2 (a) is a plan view, and FIG. 2 (b) is a right side view thereof. A concave groove 9a is also formed in an arc shape inside the arc shape, and is opened in a U-shape in the mounting direction (see FIG. 3).

At both ends in the longitudinal direction of the brake shoe 9,
The surfaces 9b, 9b to be gripped, which are cut off on an inclined surface and gripped by a gripper described later, are formed. An arc-shaped mounting edge 8f is formed on the upper plate 8c of the brake lever 8b in correspondence with the concave groove 9a of the brake shoe 9.

On both sides of the mounting edge 8f, a pair of gripping portions 8g, 8g protruding inwardly in the form of claws are formed, and the center of the mounting edge 8f is cut by a slit 8h. And communicates with the opening 8i.

As described above, by dividing the upper plate portion on which the grip portions 8g, 8g are formed by the slit 8h, the divided upper plate portions 8c, 8c function as cantilever plate-like pieces. The grips 8g, 8g can be slightly opened in the direction of arrow B.

Therefore, the brake shoe 9 is connected to both grip portions 8.
g, 8g, and pressed in the mounting direction (arrow C direction), the grips 8g, 8g are slightly opened with the slit 8h as a boundary, and ride over both grips 8g, 8g to put the brake shoe 9 on the upper plate. It can be attached to the part 8c. The mounted brake shoe 9 has its gripped surfaces 9b, 9b
Is restrained by the gripping portions 8g, 8g, thereby preventing falling off.

In the figure, reference numerals 8j, 8j denote fulcrum slots 7, 7,
This is a pin that engages with.

According to the spindle brake device having the above structure, when the brake lever 8b is lifted, the brake lever 8 is rotated about the fulcrum shaft 8a, whereby the brake shoe 9 is moved to the trunk 2a of the spindle worm 2. , So that the rotating spindle 1 can be braked.

Next, a second embodiment of the spindle brake device according to the present invention will be described with reference to FIGS. In FIG. 4, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 4, the spindle brake device 10 has fulcrum shafts 10a, 10a arranged so as to sandwich the body 2a of the spindle lobe 2, and these fulcrum shafts 10a, 10a are parallel to the movable body 10c. It is provided at the tip of the extended arms 10b, 10b (only the near side is shown). Then, the brake shoe 9 is mounted on the upper plate portion 10d of the movable main body 10c.

A leg 10e 'having the same function as the leg 8d is formed on the side plate 10e of the movable body 10c, and a brake lever 11 is provided on the back plate 10f.

FIG. 5 shows the brake device 10 for the spindle.
(A) is a plan view, (b)
FIG. 6 is a right side view of FIG. Hereinafter, the configuration of each unit will be described in detail.

The movable body 10c is formed in a U-shape by resin molding, and a pair of arms 10b, 10b extending from the fulcrum shaft 10a are composed of an upper plate 10d and a back plate 1.
0f. The movable main body 10c can be made of engineering plastic. Specifically, the movable main body 10c can be formed by uniformly mixing glass fibers in polyethylene terephthalate as a base material and injection molding.

An arc-shaped mounting edge 10g is formed on the upper plate portion 10d corresponding to the concave groove 9a of the brake shoe 9, and both ends of the mounting edge 10g are directed inward. A pair of grip portions 10h, 10h protruding in a claw shape are formed.

The brake lever 1 is attached to the back plate 10f.
Keyhole-shaped notch 10i with which one rotating shaft 11a is engaged
Above the notch 10i, a stopper 10j for holding the brake lever 11 in a vertical position is projected.

The brake lever 11 is made of a resin molded product, and has an eccentric cam 11b formed at one end of a rotating shaft 11a and a lever portion 11c formed at the other end. 11
d is a reinforcing plate portion for reinforcing the lever portion 11c,
Rotary shaft 1 between eccentric cam 11b and its reinforcing plate 11d
The brake lever 11 can be attached to the movable main body 10c by fitting 1a into the notch 10i.

However, the rotating shaft 11a is connected to the lever 1
When the brake lever 11 is in the horizontal position, the movable main body 10c is formed.
The notch 10i can be passed through, and the brake lever 11 is configured not to fall out of the notch 10i when the brake lever 11 is in the vertical position.

As described above, if the movable main body 10c is formed of a resin, the grip portions 10h, 10h can be slightly opened by utilizing the flexibility of the resin. Therefore, the brake shoe 9 is held between the two gripping portions 10h, 10h, and the mounting direction (arrow E)
Direction, the grip portions 10h, 10h are elastically deformed and slightly open, and the brake shoe 9 is moved to both grip portions 10h, 1
0h is passed over and is attached to the upper plate portion 10d.

When the brake shoe 9 is mounted,
Since the gripping portions 10h, 10h return by the restoring force, the gripping portions 10h, 10h and the surfaces 9b, 9b to be gripped are restrained by being engaged with each other.

Next, the operation of the spindle brake device 10 having the above configuration will be described.

As shown in FIG. 4, when the brake lever 11 is in the vertical position, the eccentric cam 11b is stored in the horizontal position, that is, in the movable body 10c. Therefore, in this state, the leg 10e 'comes into contact with the upper surface of the spindle rail 5, and the brake shoe 9 separates from the body 2a of the spindle worm 2, and the brake is not operated.

On the other hand, when the brake lever 11 is rotated toward the horizontal position, the eccentric cam 11b is moved to the movable body 10c.
The movable main body 10c is pushed up by projecting from the lower surface of the main body 10 and coming into contact with the spindle rail 5. Brake lever 1
When the position 1 is in the horizontal position, the movable body 10c is inclined by the amount of the projection of the eccentric cam 11b, whereby the brake shoe 9 comes into contact with and presses the body 2a of the spindle lobe 2, and the rotating spindle 1 is braked. Can be hung.

According to the brake device using the eccentric cam 11b, the brake shoes 9
Can be pressed steplessly, so that a constant braking pressure can always be applied even when the brake shoe 9 is worn. Also, the brake lever 11
As the position of the eccentric cam 11b moves toward the center of the rotating shaft 11a and becomes stable as the position approaches the lateral position, the spindle 1 applies a constant braking pressure even when the brake lever 11 is released.
Can be given to.

In the second embodiment, the movable body 10
Although the gripping portion can be elastically deformed by forming c from a resin molded product, the present invention is not limited to this.
c can also be constituted by press molding. However, in this case, it is necessary to cut the upper plate portion 10d by providing a slit as shown in FIG. 2 in the upper plate portion 10d to form a portion functioning as a cantilever plate-shaped piece.

The spindle brake device of the present invention can be applied to a spindle of a ring spinning machine, a ring twisting machine or the like.

[0046]

As is apparent from the above description,
According to the first aspect of the present invention, at the time of mounting the brake shoe, the grip portion provided on the operating body side elastically deforms to receive the brake shoe, and the brake shoe is firmly held by the restoring force after mounting the brake shoe. The wear resistance of the brake shoe can be increased by employing a brake shoe of high hardness, and the brake shoe can be easily attached to the operating body.

According to the second aspect of the present invention, since the holding portion is formed on the free end side of the cantilever plate-like piece, a high-hardness brake shoe can be attached even if the operating body is a metal part.

According to the third aspect of the present invention, since the grip portion is elastically deformed by cutting out a part of the brake lever, the cost of the brake device can be reduced.

According to the fourth aspect of the present invention, the operating body is made of resin so that the grip portion is elastically deformed by utilizing its flexibility, so that a high-hardness brake shoe is attached to the operating body. be able to.

According to the fifth aspect of the present invention, a constant braking force can be applied to the spindle by rotating the eccentric cam, and the grip portion is elastically deformed by utilizing the flexibility of the resin. With such a configuration, the braking pressure can be reliably applied to the spindle, and the wear resistance of the brake shoe can be increased.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of a spindle brake device according to a first embodiment of the present invention.

2 (a) is a plan view of the spindle brake device shown in FIG. 1, and FIG. 2 (b) is a right side view.

FIG. 3 is a perspective view showing a shape of a brake shoe.

FIG. 4 is a view corresponding to FIG. 1 showing a configuration of a spindle brake device according to a second embodiment of the present invention.

5 (a) is a plan view of the spindle brake device shown in FIG. 4, and FIG. 5 (b) is a right side view.

[Explanation of symbols]

 Reference Signs List 1 spindle 2 spindle worm 2a trunk 3 bolster 5 spindle rail 8 spindle brake device 8b brake lever 8c upper plate 8f mounting edge 8g grip 8h slit 9 brake shoe 9a concave groove

Claims (5)

[Claims] An operation body for mounting a brake shoe and bringing the brake shoe into contact with or separating from the spindle body, and pressing the brake shoe against the spindle body via the operation body to form a spindle In the brake device for a spindle that performs braking of the brake shoe, the brake shoe is made of a hard resin, and when the brake shoe is mounted on the operating body, the brake shoe is elastically deformed to receive the brake shoe. A brake device for a spindle, comprising: 2. The spindle brake device according to claim 1, wherein the grip portion is formed on a free end side of a cantilever plate provided on the operation body. 3. The cantilever plate-like piece has an operating fulcrum disposed so as to sandwich the spindle, and is formed by cutting out a part of a brake lever that swings around the operating fulcrum as a rotation center. A brake device for a spindle as described in the above. 4. The spindle brake device according to claim 1, wherein the operating body is formed of a flexible resin molded product, and the grip portion is formed integrally with the resin molded product. 5. The eccentric cam according to claim 5, wherein the operating body includes a movable main body having an operating fulcrum arranged so as to sandwich the spindle and swinging about the operating fulcrum as a center of rotation, and an eccentric cam provided on the movable main body. 5. The spindle brake device according to claim 1, wherein the movable body is displaced to a position where it can be brought into contact with the body of the spindle by a rotation operation, and the brake shoe is pressed against the body of the spindle.