JPH092075A - Guide roller for slide door - Google Patents

Abstract

PURPOSE: To provide a guide roller for a slide door, by which the need of one side seal can be eliminated so as to reduce the cost and assembling manhour. CONSTITUTION: An extending part 6a extended from an outer ring 3 curved surface 3c to the side surface 3a and the outer peripheral edge 2a of an inner ring 2 is formed on one side edge of a nylon or polyacetal resin-made covering 6 provided on the outer peripheral surface 3b to mask a clearance between the inner ring 2 and the outer ring 3. Further, a seal fitting groove 7 is formed on the other side surface 3e. A ring-like seal 8 is fitted in the seal fitting groove 7 to seal a lubricant 9 poured between the inner ring 2 and the outer ring 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide roller for a sliding door.

[0002]

2. Description of the Related Art A sliding door that slides along a side surface of a body is formed by an upper guide rail, a lower guide rail, and a center guide rail disposed on the body side, and is an intermediate portion between the upper and lower portions of a front end portion and a rear end portion in a vertical direction. The upper roller, the lower roller and the center roller provided at three positions of the section are supported so that they can be opened and closed (actual opening flat 3-98).
121 gazette, Japanese Utility Model Publication No. 5-17293 gazette). As a guide roller for a sliding door such as the upper roller, an inner ring, an outer ring rotatably mounted on the outer periphery of the inner ring via a retainer that holds a plurality of balls, and a resin-made outer ring. What is constituted by the outer skin is proposed.

[0003]

However, since the slide door guide roller having the above-described structure has a large number of parts, it has problems that it is troublesome to assemble and the cost is high. The present invention has been made in view of the above problems, and an object of the present invention is to provide a guide roller for a slide door that can omit one of the seals and reduce the cost and the number of assembling steps.

[0004]

The slide door guide roller of the present invention for achieving the above object is rotatably mounted via an inner ring and a retainer holding a plurality of balls on the outer periphery of the inner ring. A guide roller for a slide door having a formed outer ring and a resin outer cover provided on the outer periphery of the outer ring, the resin outer cover covering a gap formed between the inner ring and the outer ring from one side. It is characterized in that the extending portion is formed integrally.

[0005]

According to the sliding door guide roller having the above-described structure, the extending portion that shields the gap formed between the inner ring and the outer ring from one side is formed integrally with the resin outer skin. The sealing material on one side can be omitted, and there is an effect that the number of assembling steps can be reduced and the cost can be reduced.

[0006]

An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a sectional view of a slide roller guide roller (hereinafter simply referred to as a guide roller) 1 according to the present invention. The guide roller 1 is provided on the inner ring 2, an outer ring 3 rotatably mounted on the outer periphery of the inner ring 2 via a cage 4 that holds a plurality of balls 5 at equal intervals, and on the outer periphery of the outer ring 3. And a resin outer skin 6.

A curved surface 3c is formed from one side surface 3a of the outer ring 3 to the outer peripheral surface 3b, and the curved surface 3 is formed on one side edge of the resin jacket 6 provided on the outer peripheral surface 3b.
An extending portion 6a extending from c to the side surface 3a and the outer peripheral edge 2a of the inner ring 2 is formed to shield the gap between the inner ring 2 and the outer ring 3. At the center of the outer peripheral surface 3b, a resin cover 6 is provided.
An annular groove 3d is formed to prevent the outer ring 3 from coming off when an external force is applied to the outer ring 3.

A seal fitting groove 7 is formed on the other side surface 3e. A ring-shaped seal 8 is fitted in the seal fitting groove 7 to seal the lubricant 9 injected between the inner ring 2 and the outer ring 3. The resin outer cover 6 of the outer ring 3 is injection-molded integrally with the outer ring 3 by setting the outer ring 3 in the mold 11 as shown in FIG. Nylon or polyacetal resin is suitable as a material for the resin outer cover 6. It is also possible to form a plurality of annular grooves 3d. It is also possible to substitute a plurality of recesses (not shown) formed at intervals on the outer peripheral surface 3b. Also,
The resin outer skin 6 may be separately formed and fitted to the outer ring 3.

The guide roller 1 is used by being engaged with a guide rail 12 as shown in FIG. 3, and is formed by an extending portion 6a formed on a resin outer skin 6 provided on an outer peripheral surface 3b of an outer ring 3. Since the gap between the inner ring 2 and the outer ring 3 on one side surface 3a is shielded, and one side of the seal 8 necessary to shield the gap on both sides can be omitted, the man-hours for assembling the guide roller 1 can be reduced. The cost can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view.

FIG. 2 is a schematic explanatory view showing injection molding.

FIG. 3 is a schematic view showing a usage mode.

[Explanation of symbols]

1 ... Guide roller 2 ... Inner ring 3 ... Outer ring 3a ... One side surface 3b ... Outer peripheral surface 4 ... Retainer 5 ... Ball 6 ... Resin coating 6a ... Extension

Claims (1)

[Claims] 1. A slide door having an inner ring, an outer ring rotatably mounted on the outer periphery of the inner ring via a retainer for holding a plurality of balls, and a resin outer cover provided on the outer periphery of the outer ring. A guide roller for a slide door, wherein the resin outer cover is integrally formed with an extending portion that shields a gap formed between the inner ring and the outer ring from one side.