JPH07300220A - Roller - Google Patents

Abstract

PURPOSE:To provide a roller requiring few number of part items, easy to assemble the roller itself, simple to assemble a roller conveyor, hardly causing rotation deflection, and stable for a load. CONSTITUTION:This roller is provided with a hollow roller pipe 1, bearing cases 2 coupled on the inner' faces at both end sections of the roller pipe 1, and multiple ball bearings 3 between the bearing cases 2 and a shaft/inner ring 4. The shaft/inner ring 4 is provided with parallel flat faces on the shaft portions at the protruded end sections.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to rollers, and more particularly to rollers used for roller conveyors and the like.

[0002]

2. Description of the Related Art A roller used in a conventional roller conveyor includes a roller pipe, a bearing case fitted to both ends of the roller pipe, a ball bearing in the bearing case,
It consisted of a pipe shaft and.

In a roller generally used in a roller conveyor, a pipe shaft is fixed to a frame of the conveyor with a stop pin as shown in FIG. 3, and a ball bearing is provided between an inner ring fixed to the pipe shaft and a bearing case. After that, the roller pipe was rotatably installed.

The ball bearings are arranged in a line between the inner ring and the bearing case.

[0005]

However, with the conventional structure, it is not possible to reduce the number of parts at the time of manufacturing the roller itself and assembling the roller conveyor, so that the roller manufacturing process and the roller conveyor assembling process cannot be performed. There was a problem that labor saving was not possible.

Further, if the ball bearing is a single row, there is a problem in that rotational runout of the roller easily occurs.

It is an object of the present invention to obtain a roller having a small number of parts, an easy assembly of the roller itself and an easy assembly of a roller conveyor, and a roller which is less likely to cause rotational runout and stable to a load.

[0008]

A roller of the present invention has a hollow roller pipe and a bearing case fitted to the inner surfaces of both ends of the roller pipe, and a plurality of rows are provided between the bearing case and the inner ring that also serves as a shaft. Has a ball bearing

Further, the roller of the present invention has a hollow roller pipe and bearing cases fitted to the inner surfaces of both ends of the roller pipe, and a plurality of rows of ball bearings are provided between the bearing case and the inner ring which also serves as a shaft. Provided, the projecting end of the inner ring that also serves as a shaft has a parallel flat surface.

[0010]

[Function] The bearing case is fitted to the inner surfaces of both ends of the roller pipe and drawn. The bearing case includes an outer case and an outer ring, and the outer ring holds a plurality of rows of ball bearings.

Since there are a plurality of rows of ball bearings, rotational runout is unlikely to occur.

Since the inner ring is the inner ring that also serves as the shaft and the projecting end portions have parallel flat surfaces, the inner ring can be assembled by dropping into the frame of the roller conveyor.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings showing the embodiments.

The roller of the embodiment of the present invention comprises a roller pipe 1 made of aluminum and a bearing case 2 made of steel.
And a plurality of rows of ball bearings 3 provided in the bearing case 2 and an inner ring 4 that also serves as a shaft, and is used as a roller of a roller conveyor.

The roller pipe 1 has an inner diameter of 42, 25 mm
It is a hollow body of φ, outer diameter 45, and 75 mmφ, and a plurality of protrusions 10 may be provided at equal intervals in the circumferential direction on the inner surface in the pipe longitudinal direction. The bearing case 2 is composed of an outer case 5 and an outer ring 6, and is fixed. The outer case 5 is fitted and fixed to the inner surface of the roller pipe 1. The outer ring 6 is provided with a wall 7 so that the ball bearings 3 can be arranged in two rows in the longitudinal direction of the roller pipe 1.

The inner ring 4 which also serves as a shaft comprises an inner ring portion 4a which is a fitting portion with the roller pipe 1, and a shaft portion 4b which projects to the outside. The inner ring portion 4a has a cylindrical shape and the outer ring 6
And a plurality of rows of ball bearings 3 are supported. The shaft portion 4b has a shape in which a cylindrical shape is crushed from both sides, and has two parallel flat surfaces 4c.

In the roller pipe 1 of the present invention, the bearing case 2 is fitted on the inner surfaces of both ends of the roller pipe 1 and drawn.

Since the shaft portion 4b of the inner ring 4 serving also as the shaft has the parallel flat surface 4c, the flat surface 4c of the shaft portion 4c is
Vertical groove 9 of the frame 8 of the roller conveyor having a shape suitable for this
It can be assembled by dropping.

Next, production of the roller of the present invention will be described.

The aluminum roller pipe 1 is formed by extrusion molding using a mold. The prototype of the aluminum roller pipe 1 has a total length of 4450 mm, and six projections 10 are provided at equal intervals in the circumferential direction over the inner surface of the roller pipe in the longitudinal direction.

The roller pipe 1 is cut into a suitable length. For rollers used in roller conveyors, cut to the standard dimensions. Inner diameter 42 cut to standard dimensions,
Outer diameter 42, 2 m on both ends of the 25 mm roller pipe 1.
m bearing case 2 is inserted, the drawing machine is operated by a hydraulic system, and drawing is performed at 90 kg / cm ² ,
The product. The projection 10 is reliably fixed by the squeezing pressure being concentratedly applied to the bearing case 2.

The bearing case 2 fixes the outer case 5 and the outer ring 6 to each other. The outer case 5 is fitted and fixed to the inner surface of the roller pipe 1, and the ball bearings 3 are assembled into the outer ring 6 in two rows. From the rear part, tightening by notching.

Finally, by simply dropping it into the groove 9 of the frame 8 of the roller conveyor, the frame 8 can be used without using the stop pin.
Fixed to.

[0024]

Therefore, according to the present invention, in the roller conveyor and the like, the number of parts is small and the assembly of the roller itself is easy. In addition, roller runout is less likely to occur,
It has the effect of being stable under load.

Further, there is an effect that the assembly of the roller conveyor is simple.

[Brief description of drawings]

FIG. 1 is a sectional view of an end portion of a roller of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Roller Pipe 2 Bearing Case 3 Ball Bearing 4 Shaft Inner Ring 5 Outer Case 6 Outer Ring 7 Wall 8 Frame 9 Groove 10 Protrusion

Claims (2)

[Claims] 1. A hollow roller pipe, and a bearing case fitted to the inner surfaces of both ends of the roller pipe. The bearing case includes an outer case and an outer ring, and a plurality of rows are provided between the outer ring and the inner ring that also serves as a shaft. A roller characterized by having a ball bearing. 2. A hollow roller pipe, and a bearing case fitted to the inner surfaces of both ends of the roller pipe. The bearing case includes an outer case and an outer ring, and a plurality of rows are provided between the outer ring and the inner ring that also serves as a shaft. Roller provided with a ball bearing, and the protruding end of the inner ring that also serves as a shaft has parallel flat surfaces.