JPH0325370B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to rollers of roller conveyors, particularly low noise rollers.

Conventional technology This type of roller is, for example,
As disclosed in Japanese Patent No. 40324, a radial bearing is interposed between the end of the roller cylinder and the roller shaft inserted therein, and the bearing is integrally formed entirely of synthetic resin. The roller cylinder has an inner circumferential wall and an outer circumferential wall facing each other with a space therebetween, and the end of the roller cylinder is bent radially inward together with the outer circumferential wall so that the bearing is connected to the roller cylinder. The roller cylinder is designed to prevent it from slipping out in the axial direction from between the end and the roller shaft, and has an inner positioning protrusion formed near the end of the roller cylinder that engages with the axial inner end of the outer peripheral wall. Are known.

Problems to be Solved by the Invention In the above roller, when the outer circumferential wall is bent radially inward together with the roller cylinder, the outer circumferential wall may become wavy, and a gap is created between the roller cylinder and the outer circumferential wall. There was a problem that airtightness between the two could not be maintained. In addition, in order to position the bearing, protrusions must be formed on the roller cylinder, and the protrusions become a nuisance, making it impossible to use the roller cylinder effectively over its entire length, which limits the uses of the conveyor. There was also the problem of putting it away.

An object of the present invention is to provide a roller for a roller conveyor that solves the above-mentioned problems.

Means for Solving the Problems The rollers of the roller conveyor according to the present invention are
A radial bearing is interposed between the end of the roller cylinder and the roller shaft inserted therein. The roller cylinder has an inner circumferential wall and an outer circumferential wall facing each other, and the end of the roller cylinder is bent radially inward together with the outer circumferential wall.
A roller whose bearing is prevented from slipping out in the axial direction from between the end of the roller cylinder and the roller shaft.
In the roller of a conveyor, slits extending axially inward from the axially outer end of the outer peripheral wall are provided at multiple positions in the circumferential direction of the outer peripheral wall, and the slits are provided at the axially outer end of the outer peripheral wall to engage with the end surface of the roller cylinder. It is characterized by being provided with a brim.

Function: In the roller conveyor according to the present invention, slits extending axially inward from the axially outer end of the outer circumferential wall are provided at a plurality of positions in the circumferential direction of the outer circumferential wall, so that the outer circumferential wall is folded inward. When bent, the outer circumferential wall deforms so that the slit narrows its width, and the outer circumferential wall does not wave.

Further, since the axially outer end of the outer circumferential wall is provided with a collar that engages with the end surface of the roller cylinder, the bearing can be positioned regardless of the length of the roller cylinder.

Embodiments Embodiments of the present invention will now be described with reference to the drawings.

The roller of the roller conveyor has a radial bearing 13 interposed between the end of a roller cylinder 11 and a roller shaft 12 inserted therein. Both the roller cylinder 11 and the roller shaft 12 are hollow. The bearing 13 is made of synthetic resin and has a substantially U-shaped cross section as a whole, and is integrally provided with an inner circumferential wall 14 and an outer circumferential wall 15 that face each other, and at the inner end in the axial direction thereof. It consists of a connecting wall 16. Inner peripheral wall 14 and outer peripheral wall 1
As will be described later, between 5 and 5, there is a gap 1 that provides relief when the outer peripheral wall 15 is bent inward in the radial direction.
7 exists. Specific examples of synthetic resins include:
Examples include polyacetal resin and ABS resin, which are called engineering plastics.
A collar 18 is provided at the axially outer end of the outer peripheral surface of the outer peripheral wall 15, and this abuts against the end surface of the roller cylinder 11.
This prevents the bearing 13 from moving inward in the axial direction from the end of the roller cylinder 11. As shown in FIG.
Slits 19 extending inward in the axial direction from the outer end of the outer peripheral wall 15 are provided at six locations that equally divide the outer peripheral wall 15 in the circumferential direction.
is provided. The end of the roller cylinder 11 is bent inward in the radial direction together with the outer circumferential wall 15, so that the bearing 13 is
1 and the roller shaft 12 to prevent it from slipping out in the axial direction outward.

FIG. 3 shows another embodiment. In this embodiment, a large number of steel balls 36 are interposed between the roller shaft 12 and the inner peripheral wall 34 of the bearing 33.
The bearing 33 is designed to withstand even higher loads. Annular grooves 37 and 38 are provided on the outer circumferential surface of the roller shaft 12 and the inner circumferential surface of the inner circumferential wall 34, respectively, in which the balls 36 roll. Annular groove 3 in inner peripheral wall 34
A metal plate 39 is applied to the circumferential surface of 8. Further, the ball 36 is held by a retainer 40.

Effects of the Invention According to this invention, when the outer circumferential wall is bent inward, the outer circumferential wall is deformed so that the width of the slit is narrowed, and the outer circumferential wall does not wave.
There is no gap between the outer peripheral wall of the roller cylinder.
It is possible to maintain airtightness between the two.

Furthermore, since the bearing can be positioned regardless of the length of the roller cylinder, the bearing can be positioned easily and accurately.Moreover, by cutting the roller cylinder to an appropriate length, it is possible to rollers can be manufactured.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view, FIG. 2 is an exploded perspective view, and FIG. 3 is a longitudinal sectional view equivalent to FIG. 1 showing another embodiment. 11...Roller cylinder, 12...Roller shaft, 13,
33... Bearing, 14, 34... Inner peripheral wall, 15...
Outer wall, 18... brim, 19... slit.

Claims (1)

[Claims] 1. A radial bearing is interposed between the end of the roller cylinder and the roller shaft inserted therein, and the bearing is integrally formed as a whole from synthetic resin, and The roller cylinder has an inner circumferential wall and an outer circumferential wall facing each other with a space therebetween, and the end of the roller cylinder is bent radially inward together with the outer circumferential wall, and the bearing is connected between the end of the roller cylinder and the roller. In roller conveyor rollers that are designed to prevent the rollers from slipping out axially outward from between the shafts, slits extending axially inward from the axially outer end of the outer peripheral wall are provided at multiple positions in the circumferential direction of the outer peripheral wall. A roller for a roller conveyor, characterized in that a collar is provided at the axially outer end of the outer circumferential wall and engages with an end surface of the roller cylinder.