Roller

Patent metadata

Field	Value
Publication number	US-2023128110-A1
Application number	US-202218049442-A
Country	US
Kind code	A1
Filing date	Oct 25, 2022
Priority date	Oct 27, 2021
Publication date	Apr 27, 2023
Grant date	—

Abstract

A roller including: a main body portion configured to include an outer ring and a rotatable inner ring on an inner circumferential side of the outer ring; and a covering portion disposed on an outer circumferential surface of the outer ring, the covering portion being made of a synthetic resin in which reinforced fibers are dispersed, wherein the covering portion includes a region in which arrangement directions of the reinforced fibers are aligned.

First claim

What is claimed is:

1 . A roller including:
a main body portion configured to include an outer ring and a rotatable inner ring on an inner circumferential side of the outer ring; and a covering portion disposed on an outer circumferential surface of the outer ring, the covering portion being made of a synthetic resin in which reinforced fibers are dispersed, wherein the covering portion includes a region in which arrangement directions of the reinforced fibers are aligned.

2 . The roller according to claim 1 , wherein the region is in contact with the outer circumferential surface of the outer ring.

3 . The roller according to claim 1 , wherein, in the region, the reinforced fibers form an angle of 0 degrees to 50 degrees with respect to the outer circumferential surface of the outer ring.

4 . The roller according to claim 1 , wherein a flange portion is formed on the outer ring, the region includes a first region in which the reinforced fibers are aligned in a first direction and a second region in which the reinforced fibers are aligned in a second direction, the second region is disposed closer to the flange portion than the first region, and, when an angle between the outer circumferential surface of the outer ring and the first direction is 0 degrees to 50 degrees, an angle of the second direction with respect to the outer circumferential surface (as a rotation angle in a direction identical with the first direction) is 130 degrees to 180 degrees.

5 . The roller according to claim 1 , wherein one side surface of the outer ring is covered with the covering portion, the reinforced fibers are aligned in a side surface covering region covering the side surface, and an angle of the reinforced fibers is within ±10 degrees assuming that a direction away from the side surface toward an outer circumferential surface of the covering portion is +.

6 . The roller according to claim 1 , wherein a stepped portion is formed on the outer circumferential surface of the outer ring.

7 . The roller according to claim 6 , wherein a weir portion is formed on a side of the one side surface of the outer circumferential surface.

8 . The roller according to claim 7 , wherein a flange portion is provided on another side surface of the outer circumferential surface, and a recess portion continuous with the flange portion is formed.

9 . The roller according to claim 4 , wherein a recess portion continuous with the flange portion is formed on the outer circumferential surface, a weir portion is formed on a side surface opposite to the flange portion of the outer circumferential surface, the first region covers the weir portion, and the second region covers the recess portion.

10 . A method for manufacturing a roller which includes:
a main body portion configured to include an outer ring and a rotatable inner ring on an inner circumferential side of the outer ring; and a covering portion disposed on an outer circumferential surface of the outer ring, the covering portion being made of a synthetic resin in which reinforced fibers are dispersed, the method including a step of setting a mold covering a periphery of the outer ring by using the outer ring as an insert, wherein an inflow path of a forming material for the covering portion is formed between the mold and a side surface of the outer ring, wherein the forming material includes the synthetic resin and the reinforced fibers, and the reinforced fibers are inclined with respect to the side surface when the forming material is allowed to pass through the inflow pass.

11 . The method for manufacturing a roller according to claim 10 , wherein inclination angles of the reinforced fibers when passing through the inflow path are within ±10 degrees assuming that a direction away from the side surface toward an outer circumferential surface of the covering portion is +.

Assignees

• Daido Metal Co

Inventors

• Kumagai Yuichi
• Takada Yohei

Classifications

• B29C45/0005 Primary

  using fibre reinforcements · CPC title

• B29C45/14598

  Coating tubular articles · CPC title

• E05Y2800/45

  Manufacturing · CPC title

• B29L2031/32

  Wheels, pinions, pulleys, castors or rollers {, Rims (inner tubes B29L2023/245; gears B29L2015/003; tyres B29L2030/00)} · CPC title

• B29K2307/04

  Carbon · CPC title