JPH0621647Y2 - Elastic retaining ring for polishing belt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a retaining ring that should elastically retain an endless polishing belt on the outer peripheral surface thereof, and elastically deforms and polishes by centrifugal force during rotation and polishing. The present invention relates to an elastic holding wheel for a polishing belt that holds a belt under pressure.

(Prior Art) Conventionally, as this type of retaining ring, one having a structure in which an elastic ring made of rubber sponge is adhered to the outer peripheral surface of an inner ring by an adhesive is known. Due to centrifugal force and friction reaction force from the surface to be polished during polishing,
The rubber sponge ring peels off from the adhesive surface with the inner ring,
It has a drawback of breaking, and thus has an inconvenience that its application is limited to low speed rotary polishing.

(Problems to be Solved by the Invention) An object of the present invention is to obtain an elastic holding ring for a polishing belt that enables effective polishing without causing peeling or breaking even in high-speed rotation polishing.

(Means for Solving the Problem) Therefore, in the elastic holding wheel for a polishing belt of the present invention, a ring-shaped elastic wheel having a through hole in the center portion made of a flexible elastic rubber or an elastic foam has an inner peripheral portion. The structure is such that it is sandwiched by two circular holding plates while being compressed from both sides.

Natural rubber and synthetic rubber are used for the flexible elastic rubber in the present invention, and sponges of natural rubber and synthetic rubber, and synthetic resin foam are included in the elastic foam.

An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment) In FIGS. 1 and 2, the elastic ring (1) of the elastic holding ring (A) is a wheel-shaped body having a through hole in the center portion, which is made of synthetic rubber sponge in this example, and is initially radial. Although the cut surface was rectangular, the inner peripheral portion (2) of the radial cut surface, which extends about one half of the width from the inner peripheral edge to the outer peripheral edge, has two circular holding plates (5), (6). ), It is sandwiched by being compressed from both sides, whereby the inner peripheral part (2) is formed into a strong consolidated structure with a higher density than the outer peripheral part (3), and the inner peripheral part (2) to the outer peripheral part ( The intermediate portion (4) extending to 3) is formed in a gradually pressured structure in which bubbles in the inside are gradually recovered from the consolidation structure and transferred to the sponge.

The sandwiching structure of the holding plates (5) and (6) is as follows. First
Bearing tube (7) having steps on both ends of the outer peripheral surface as shown
Is inserted into the through hole of the elastic ring (1), and the circular spacer plates (8) and (9) having the through holes are pressed against the inner peripheral portion (2) of the elastic ring (1) from both sides, and the bearing cylinder A circular holding plate (5), (6) fitted on the outermost periphery of (7) and then having a through hole on its outer side
While pressing, the elastic ring inner peripheral portion (2) is compressed by being fitted to the step portions at both ends of the bearing tube (7), and in that state, the holding plates (5), (6) and the spacer plate (8). , (9) and the inner peripheral portion (2) are bound by the binding metal (10).

In use, as shown in FIG. 5, a large number of elastic retaining rings (A) ... are fitted on one rotating shaft (a) in its bearing tube (7) and both flanges (b) (c) are fitted. Tighten with a nut (d) in between. An endless polishing belt (B) having a diameter slightly larger than that of the retaining ring (A) is formed on the outer peripheral surface of the retaining ring group (A) ...
When the retaining ring group is rotated and the retaining ring group is rotated, the elastic ring (1) outer peripheral portion (3) of each retaining ring (A) is elastically expanded and deformed in the radial direction by the centrifugal force and the endless polishing belt ( Hold B) by crimping.
When the rotation of the retaining ring group (A) is further increased and the object to be polished is brought into contact with the surface of the rotating polishing belt (B), a strong friction reaction force is applied to the elastic ring (1) of each retaining ring. In this case, the elastic ring (1) has a structure in which the inner peripheral portion (2) held by the two holding plates (5) and (6) has a compact structure so that the two holding plates are held.
(5), (6) is firmly clamped, and the intermediate portion (4) has a gradual pressure structure, which suppresses the friction reaction force from directly concentrating on the inner peripheral portion (2), thereby Prevent the elastic ring (1) from peeling and breaking.

Another embodiment shown in FIG. 3 is that both holding plates (5a), (6a) and a bearing tube are used.
Glue the inner peripheral portion (2a) of the elastic ring (1a) between the outer peripheral surface of (7a).
It is sandwiched by (11a), and the holding plates (5a) and (6a) are bearing tubes (7a).
And a flange at one end of the bearing sleeve that is fitted on the outer peripheral surface of the
The other structure is substantially the same as that of FIG.

Still another embodiment of FIG. 4 is one in which flexible elastic sheets (14b) and (14b) made of rubber or the like are adhered to both sides of an elastic ring (1b) by an adhesive such as a rubber adhesive which maintains elasticity. The adhesive structure uses a spacer between one holding plate (5b) integrally formed at one end of the bearing tube (7b) and the other holding plate (6b) fitted at the other end. Inner part of elastic ring via plates (8b) and (9b)
This is an example in which (2b) is bound by the binding metal (10b) ....

(Effects of the Invention) According to the elastic holding wheel for a polishing belt of the present invention, when an endless polishing belt is attached to this and used for high-speed rotary polishing, the inner peripheral portion of the elastic wheel held between both holding plates is compacted. Due to the structure, it is firmly held by both holding plates, and the intermediate part has a gradual pressure structure, which suppresses the concentration of friction reaction force on the inner peripheral part, thereby sufficiently separating and breaking the elastic ring. It can be prevented.

[Brief description of drawings]

Drawing shows an embodiment of the present invention, Fig. 1 is a longitudinal sectional view, Fig. 2 is a partially omitted side view, Fig. 3 is a longitudinal sectional view of another embodiment, and Fig. 4 is a further embodiment. Partially omitted enlarged vertical cross-section view, No. 5
The figure is a schematic diagram of the state of use. 1, 1a, 1b ... elastic ring, 2, 2a, 2b ... inner peripheral portion, 5, 5a, 5b, 6, 6a, 6b ... holding plate.

Claims (1)

[Scope of utility model registration request] 1. A wheel-shaped elastic ring made of a flexible elastic rubber or an elastic foam and having a through hole at its center has two inner peripheral portions.
An elastic retaining ring for a polishing belt, which is clamped in a compressed state from both sides by a circular holding plate.