JP2000291633A - Composite roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent coming off of ring members when a roller receives a load and rotates by forming and integrating an intermediate elastic absorption layer, an intermediate reinforcing layer, and a surface elastic layer sequentially along outer periphery of a hub member and forming the intermediate reinforcing layer as a join body of the ring members. SOLUTION: This composite roller 20 is supported on a rotary shaft 30 through a bearing 11 in an equipment, a hub member 12 of a core metal made of metal or resin material is fitted in outer periphery of the bearing 11, and an intermediate elastic absorption layer 13 made of rubber which has small permanent distortion and excels in distortion recovery property is baked and formed at its outer periphery. Furthermore, intermediate reinforcing layers 16, 17 which are comparatively thin layers and are made of metal having the same quality as the hub member 12 are joined at its outer periphery by baking and fitting, and a surface elastic layer 15 is formed by injection- molding a rubberlike elastic material or thermoplastic resin from a melted condition in an outermost layer to cover the layer 16 completely and form the layer 16 having a predetermined thickness. Consequently, weight load during operation stop is reduced in the layers 16, 17, and coming off of ring members is prevented when a roller receives the load and rotates owing to the above configuration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite roller used for a rotary drive of general industrial equipment.

[0002]

2. Description of the Related Art The applicant has previously provided a hub member as a core metal supported on an axle or a rotating shaft, and along an outer periphery of the hub member, an intermediate elastic absorbing layer, an intermediate reinforcing layer, a buffer, The present invention proposes a composite roller in which a surface elastic layer for vibration isolation and sound absorption is sequentially formed and integrated, wherein the intermediate reinforcing layer is a joined body of two layers of a ring-shaped metal ring member and a resin ring member. (JP-A-8-232946).

In the composite roller proposed here, the material and the physical properties of the hub member side are added to the surface elastic layer under the operating conditions in which the operation and the stop are frequently repeated and a heavy load is continuously applied even during the stop. Even in a composite roller in which permanent distortion is likely to occur due to the difference, the permanent distortion generated in the surface elastic layer is absorbed by the intermediate elastic absorption layer formed underneath and quickly recovers to its original shape, and the weight load is intermediate reinforcement. Since the layers are shared, the surface elastic layer has both effects of recovering the permanent strain and reducing the load, and has the effect of preventing noise and vibration due to deviation from the hub member side and occurrence of a step, but the intermediate effect is achieved. Since the reinforcing layer is formed of a two-layered joined body of a ring-shaped metal ring member and a resin ring member, when the roller rotates while receiving a load, separation occurs between these ring members. Room to do It was observed.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a hub member as a metal core supported on an axle or a rotating shaft, and along a periphery of the hub member, an intermediate elastic absorbing layer and an intermediate reinforcing layer. And a composite roller in which a surface elastic layer for absorbing, damping, and absorbing sound is sequentially formed and integrated, and the intermediate reinforcing layer is a joined body of ring-shaped ring members, and the roller rotates while receiving a load. It is an object of the present invention to provide a member that cannot separate from these ring members during exercise.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is as follows.
In the composite roller having the above-described structure, this is achieved by forming the intermediate reinforcing layer by a joined body of ring-shaped metal ring members.

Here, the intermediate reinforcing layer is formed not as one ring-shaped metal ring member but as a joined body of two ring-shaped metal ring members because an intermediate elastic absorption layer (for example, a protective layer) is provided inside the intermediate reinforcing layer. Vibration rubber) and a surface elastic layer (e.g., urethane rubber) on the outside must be formed by baking, but joining these two to both sides of one metal ring member can be performed in order, even if performed in baking conditions. This is impossible because of this, and a metal ring member in which these two parts are separately joined must be used.

[0007]

FIG. 1 is a perspective view of a composite roller 20 according to the present invention, which is partially broken. The composite roller 20 is supported by a device on a rotating shaft 30 via a bearing 11 such as a bearing. A hub member 12 of a cored bar made of a metal such as iron, cast iron, aluminum, or a resin material is fitted around the outer periphery of the bearing 11. On the outer periphery of the hub member 12, an intermediate elastic absorption layer 13 made of rubber having a small permanent distortion and excellent in strain recovery, for example, natural rubber, nitrile rubber, ethylene propylene rubber, or the like is formed by baking or the like.
The material of the intermediate elastic absorption layer 13 is selected from those having little permanent distortion and excellent in original shape recovery even when distortion occurs. Further, a relatively thin intermediate reinforcing layer made of metal of the same quality as that of the hub member 12 is provided on the outer periphery of the intermediate elastic absorbing layer 13.
(16, 17) are joined by means such as shrink fitting. Further, a surface elastic layer 15 is formed on the outer periphery of the intermediate reinforcing layer 16 as the outermost layer, and the surface elastic layer 15 injects a rubber-like elastic material such as urethane rubber or silicon rubber, or a thermoplastic resin from a molten state. The intermediate reinforcing layer 16 is formed to a predetermined thickness so as to completely cover the intermediate reinforcing layer 16 by molding or the like. The surface elastic layer 15, together with the intermediate elastic absorbing layer 13, serves as a portion for buffering a load applied from a device acting when the roller is driven and satisfying functions such as vibration isolation and sound absorption.

In the present invention, the intermediate layer of the composite roller is formed as a joined body of two layers 16, 17 which are ring-shaped metal ring members. As the metal ring member, iron,
Rings made of metal such as cast iron and aluminum are used, and the strong joining of these metal ring members is performed by a general joining method used for joining metals, for example, a method such as fitting. Will be Note that an intermediate elastic absorption layer or a surface elastic layer is formed in advance on the surface of the metal ring member to which they are joined.

Accordingly, when the composite roller 20 is driven by being attached to the device via the rotating shaft 30, for example, when a considerable load is continuously applied to the entire roller even when the driving is stopped, the surface elasticity which is the uppermost layer In the layer 15, a permanent strain is generated by the load due to a thermal expansion from the intermediate reinforcing layer (16, 17) or a difference in material. Surface elastic layer 15
Although materials with excellent abrasion resistance and heat resistance are originally selected, operation-stopping by ascending and descending is frequently repeated as in the case of guide rollers for elevators. The generation of permanent distortion cannot be completely suppressed under severe use conditions that continue.

[0010] The permanent strain generated in the surface elastic layer 15 is absorbed by the intermediate elastic absorbing layer 13. The intermediate elastic absorption layer 13 is less likely to cause permanent distortion and has excellent original shape recovery even when distortion occurs, but is inferior to the surface elastic layer 15 in physical properties such as wear resistance and heat resistance. . A highly rigid intermediate reinforcing layer (16, 1
7) can be supplemented. Intermediate reinforcement layer (16, 17)
Reduce the weight load during operation stop by the load of the load, minimize the permanent strain generated in the surface elastic layer 15,
Even if permanent distortion occurs, it is quickly recovered.

As described above, the surface elastic layer is formed of a rubber-like elastic material such as urethane rubber or silicone rubber, or a thermoplastic resin obtained by injection molding from a molten state. In general, urethane rubber is used. Not satisfied in terms of sex.

For example, a composite roller having a surface elastic layer formed by applying an adhesive on the intermediate reinforcing layer and then baking urethane rubber at a high temperature, applies a predetermined load to its shaft.
When it was brought into contact with a mating wheel having a diameter of 0 mm and rotated at a rotation speed of 130 m / min, no cracks were generated under the conditions of a load of 350 kgf and a rotation time of 1000 hours, but cracks were generated at a load of 450 kgf in 300 hours.

In place of the urethane rubber, a cast polyamide resin (a typical example is MC nylon etc.) which is a thermosetting resin is used, formed into a ring shape, and fitted on the intermediate reinforcing layer. In the case of the above, no crack was observed in the rotation test under the above-mentioned conditions even when the load was 350 kgf or 450 kgf for 1000 hours, respectively.

[0014]

According to the present invention, there is provided a hub member as a metal core supported on an axle or a rotating shaft, and along the outer periphery of the hub member, an intermediate elastic absorbing layer, an intermediate reinforcing layer, and surface elasticity for cushioning, vibration isolation and sound absorption. In the case of a composite roller in which layers are sequentially formed and integrated, and when the intermediate reinforcing layer is formed as a joined body of ring-shaped metal ring members, when the roller rotates while receiving a load, Separation hardly occurs between these ring members. Further, when the surface elastic layer is formed of a cast polyamide resin which is a thermosetting resin, the durability can be further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a partial cross section showing a composite roller according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Bearing 12 Hub member 13 Intermediate elastic absorption layer 15 Surface elastic layer 16, 17 Metal ring member 20 Composite roller

Claims (3)

[Claims] 1. A hub member as a metal core supported on an axle or a rotating shaft, and an intermediate elastic absorbing layer, an intermediate reinforcing layer, and a surface elasticity for cushioning, vibration isolation and sound absorption along the outer periphery of the hub member. A composite roller in which layers are sequentially formed and integrated, wherein the intermediate reinforcing layer is a joined body of ring-shaped metal ring members. 2. The composite roller according to claim 1, wherein the surface elastic layer is formed of a cast polyamide resin. 3. The composite roller according to claim 1, which is used as a guide roller for an elevator.