JPH0611404Y2 - Roller for conveyor chain - Google Patents

Description

TECHNICAL FIELD The present invention relates to a roller for a conveyor chain.

2. Description of the Related Art Generally, the rollers of a chain rotate while causing sliding friction between the rollers and the bushes, and shock-contact with the sprockets to transmit the driving force.

Further, particularly in the case of a conveyor chain, in addition to the above, the rollers must roll on the rails while receiving a traveling load.

To illustrate a concrete example of a conveyor chain having such rollers, first, FIG. 2 shows a conveyor chain having the most common center roller (CR).

The side roller (SR) type shown in FIG. 3 is superior to the center roller type shown in FIG. 2 in running stability. Transport and temporary storage (accumulation) can be performed.

The rollers in the top roller (TR) type shown in FIG.
As described above, loading / transporting and temporary storage of the transported items are performed.

By the way, conventionally, such a roller is (1) cast iron, steel,
Consist of a single material such as resin, (2) two-layer structure of outer layer of cast iron or steel and inner layer of resin, (3) two-layer structure of outer layer of urethane rubber and inner layer of steel, etc. It had been.

For this reason, the wear resistance and low noise required for the rollers of the conveyor chain cannot be satisfied at the same time.

That is, since the drawback of (1) is a single material, it is essentially impossible to satisfy both low noise and wear resistance,
(2) is not suitable for low noise, although it can satisfy wear resistance, (3)
Has low noise, but its abrasion resistance is insufficient.

The present invention is intended to solve the above problems in a roller for a conveyor chain by combining three layers of polymer materials in the radial direction.

Means and Actions for Solving Problems According to the present invention, the rollers of the conveyor chain are all made of a polymer material, and three layers are formed in the radial direction of the rollers, and the inner layer is made of a wear-resistant material such as polyacetal or polyamide. The above problems are solved by using a roller for a conveyor chain in which the intermediate layer is made of a material having a low elastic modulus such as polyethylene or elastomer and the outer layer is made of a material having a high elastic modulus such as nylon or polyacetal.

In a three-layer conveyor chain roller, the inner layer that has a surface that slides with the bush is made of a polymer material with high wear resistance to reduce wear on the inner diameter surface of the roller, and the middle layer has a low elastic modulus. It is configured to have low noise by using a polymer material.

Since sound is energy, a material with a low elastic modulus that is easily deformed can absorb noise by deformation to obtain low noise characteristics.

Furthermore, the outer layer is made of a material with a high elastic modulus, which facilitates rolling,
Minimize wear caused by rolling. Since the material having a high elastic modulus has a small deformation, it has a low resistance, is liable to roll, and is less worn. The inner and outer layers may be made of the same material.

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

In FIGS. 1 (a) and (b), 11 is an inner layer made of a polymer material having excellent wear resistance such as polyacetal or polyamide,
Reference numeral 12 denotes an outer layer made of a polymer material having a high elastic modulus such as polycarbonate or polyacetal, and 13 denotes an intermediate layer made of a polymer material having a low elastic modulus such as polyethylene or an elastomer and excellent in low noise. The outer diameter surface and the inner diameter surface of the intermediate layer 13 are joined together, and the outer diameter surface of the intermediate layer 13 and the inner diameter surface of the outer layer 12 are joined together.

As for the method of joining each layer, the inner layer, the intermediate layer and the outer layer may be simultaneously molded in one mold, or the inner layer or the outer layer prepared previously may be put into the mold and bonded to the remaining two layers. Alternatively, they can be made separately and integrated by mechanical joining such as press fitting.

The materials of the inner layer 11 and the outer layer 12 may be the same. As described above, materials that can be used for both the inner layer and the outer layer include nylon, polycarbonate, polyflon, and delrin (polyacetal).

Advantages of the Invention The roller for a conveyor chain of the present invention has (1) a low noise property because the intermediate layer of the three-layer structure is a polymer material having a low elastic modulus.

(2) Since the inner layer of the roller that slides on the bush is a polymer material having excellent wear resistance, wear is reduced and the life is long.

(3) The outer layer of the three-layer structure is a polymer material having a high elastic modulus and excellent in wear resistance, and therefore wear is reduced and the life is long.

(4) Since all rollers are made of polymer material, it does not rust or scratch the conveyed items.

(5) In addition, it is lightweight and consumes less power.

(6) Especially in the center roller type conveyor chain, the rollers engage with the drive sprocket under a large load, so that the features of the present invention capable of satisfying both requirements of low noise and abrasion resistance are exhibited.

[Brief description of drawings]

1 (a) and 1 (b) are a front view and a vertical sectional view of an embodiment of the present invention,
2 is a plan view of the center roller type conveyor chain,
FIG. 3 is a plan view (partly in section) of the side roller type conveyor chain, and FIG. 4 is a perspective view of the top roller type conveyor chain. 11 ... inner layer 12 ... outer layer 13 ... middle layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenro Nakagawa, 4-17, Tsurumi Tsurumi, Tsurumi-ku, Osaka, Osaka Prefecture (72) Inside Tsubakimoto Chain Co., Ltd. (72) Yasumasa Tsubaki, 4-17, Tsurumi, Tsurumi-ku, Osaka, Osaka No.88 Tsubakimoto Chain Co., Ltd. (72) Inventor Fumio Ochiai No.88, Tsurumi 4-chome, Tsurumi-ku, Osaka City, Osaka Prefecture 88 No. 88 Tsubakimoto Chain Co., Ltd. (56) Reference JP 59-106742 (JP, A) 57-182649 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A polymeric material comprising three layers in a radial direction, an inner layer made of a wear resistant material such as polyacetal, polyamide, etc., an intermediate layer made of a material having a low elastic modulus such as polyethylene, elastomer, etc., and an outer layer made of A roller for a conveyor chain, which is made of a material having a high elastic modulus such as polycarbonate or polyacetal.