JPH05215127A - Roller and the like - Google Patents

Abstract

PURPOSE:To reduce effect of thrust force by providing an elastomer layer bonded to a core metal or a bearing outer circumferential part, and a ring having a rigidity bonded to its outer circumferential part strongly and having an outer layer at its circumferential part. CONSTITUTION:A roller 1 comprises an elastomer layer 3 comprising urethane, rubber, etc., bondedly fixed to an outer circumferential part of a cylindrical core metal 2 strongly, a rigid metal ring 4 bonded to an outer circumferential part of the elastomer layer 3 strongly and an outer layer 5 comprising urethane, rubber, and resin bondedly fixed to an outer circumferential part of the metal ring 4. An elasticity modulus of material of the elastomer layer 3 is set to be smaller than that forming the outer layer 5. Thrust force in running along a curved line can thus be absorbed by deformation of the elastomer layer 3, and effect of the thrust force to the outer layer 5 is reduced. By providing the metal ring 4 between the elastomer layer 3 and the outer layer 5, binding force between the elastomer layer 3 and the outer layer 5 is increased, and the deformation of the elastomer layer 3 can be prevented from being transmitted to the outer layer 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to rollers such as rollers and solid tires.

[0002]

2. Description of the Related Art Many rollers such as rollers and solid tires are used in transportation lines such as an assembly line and a sorting line, and these transportation lines are usually composed of straight lines and curved lines. Therefore, the radial load is applied to the rollers running on these lines on the straight line and the thrust load is applied on the curved line.

By the way, in the conventional rollers a, generally, for example, as shown in FIG. 6, an outer layer c made of urethane, rubber, resin or the like is simply adhered to a core metal b (or bearing). It was a structure.

[0004]

Therefore, when the conventional rollers a run on a curved line, the thrust force acts on the outer layer c made of urethane, rubber, resin, or the like, and wear or heat is generated to cause the adhesive surface to move. There is a high possibility of leading to peeling and puncture, and there was a tendency for a shorter life.

The present invention provides rollers which can reduce the influence of thrust force.

[0006]

The invention according to claim 1 is premised on rollers such as a roller provided with an outer layer made of urethane, rubber or resin on the outside of a cored bar or bearing, a roller such as a solid tire, and the core described above. An elastomer layer made of urethane, rubber or the like that is adhered to the outer periphery of gold or the bearing,
A ring having rigidity, which is firmly joined to the outer peripheral portion of the elastomer layer and has the outer layer bonded to the outer peripheral portion. As the ring, for example, a metal ring, a plastic ring, a carbon fiber-reinforced glass fiber-reinforced plastic ring is used.

The elastic modulus Ee of the material forming the elastomer layer and the elastic modulus EG of the material forming the outer layer have the following relationship.

Ee ≤ EG

[0009]

According to the first aspect of the present invention, the thrust force is absorbed by the deformation of the elastomer layer during traveling on a curved line or the like, and the influence of the thrust force on the outer layer is mitigated. In addition, the ring having rigidity enhances the bonding force between the elastomer layer and the outer layer, and the deformation of the elastomer layer is blocked without being transmitted to the outer layer.

According to the second aspect of the present invention, the elastic modulus of the material forming the elastomer layer is smaller than that of the material forming the outer layer, so that the thrust force is effectively relieved by the elastomer layer.

[0011]

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

In FIG. 1 showing the overall structure, 1 is a roller, and an elastomer layer 3 made of urethane, rubber or the like is firmly adhered and fixed to an outer peripheral portion of a cylindrical core metal 2 so as to cover the outer peripheral portion. .. On the outer peripheral portion of the elastomer layer 3, a metal ring 4 having rigidity is firmly adhered and fixed so as to cover the outer peripheral portion. Further, an outer layer 5 made of urethane, rubber, or resin is firmly bonded and fixed to the outer peripheral portion of the metal ring 4 so as to cover the outer peripheral portion. The elastic modulus of the material forming the elastomer layer 3 is set smaller than that of the material forming the outer layer 5, and the thrust force acting on the roller 1 can be effectively relaxed by the elastomer layer 3. That is, the elastic modulus Ee of the material forming the elastomer layer 3 and the elastic modulus EG of the material forming the outer layer 5 have the following relationship.

Ee ≤ EG With the above configuration, the thrust force is absorbed by the deformation of the elastomer layer 3 having a low elastic modulus when traveling on a curved line or the like, and the influence of the thrust force on the outer layer 5 is mitigated. Further, by providing the metal ring 4 between the elastomer layer 3 and the outer layer 5, the bonding force between the elastomer layer 3 and the outer layer 5 is enhanced regardless of whether they are the same material or different materials. In addition, the deformation of the elastomer layer 3 can be blocked so as not to be transmitted to the outer layer 5.

Further, the outer layer 5 maintains the original functions of the rollers such as vibration absorption, shock absorption and noise reduction, like the conventional rollers.

Next, the tests conducted on the examples of the present invention and the comparative examples will be described.

-Inventive Example 1-First, a core metal having an outer diameter of 100 mm and a width of 50 mm and an outer diameter of 105 m.
Prepare a metal ring of m, inner diameter 103mm, width 54mm,
The outer peripheral portion of the core metal and the inner and outer peripheral portions of the metal ring are sandblasted and washed and degreased with trichloroethane. Then, Chemlock 218 (adhesive made by Road Far East Co., Ltd.) was applied with a brush over the entire outer circumference of the core metal and the inner and outer circumferences made of metal, air-dried, and then in an oven at 110 ° C. Bake for 30 minutes.

Then, as shown in FIG.
The metal ring 4 is set in the mold 16, and the compound urethane of Formulation Example 2 shown in Table 1 is used for the ring 4 and the outer peripheral wall portion 1 of the mold 16.
6A, and the compounded urethane of Formulation Example 1 was cast between B between the ring 4 and the core 15. The mold temperature is 1
It is 10 ° C. In FIG. 2, L1 = 100 mm, L2 =
103 mm, L3 = 105 mm, L4 = 125 mm.

[0018]

[Table 1] In addition, the production of the compounded urethane in Table 1 was carried out according to a conventional method. For example, Vulcolan 2000M (Polyester Polyol) 130
Heat to ℃, desmodule 15 (isocyanate) and 1
The reaction was carried out for 5 minutes. Crosslinker-B (crosslinking agent) was added to and mixed with the obtained liquid.

Then, 60 minutes after the casting, the mold was demolded, and then after-cured in an oven at 110 ° C. for 24 hours. After after-curing, it was aged at room temperature for one week, and then the casting surface side was cut to produce a roller having an outer diameter of 125 mm and a width of 50 mm.

Inventive Example 2 In the same manner as in Inventive Example 1, the compounded urethane of Compounding Example 2 shown in Table 1 was applied between the ring 4 and the outer peripheral wall portion 16a of the mold 16 A.
And cast between the ring 4 and the core metal 15 in B, respectively,
Rollers of the same size were manufactured.

Comparative Example 1 An outer peripheral portion of a core metal having an outer diameter of 105 mm and a width of 50 mm was sandblasted, washed and degreased, coated with an adhesive, baked, and then set in a mold as in the case of the first embodiment of the present invention. Outer layer urethane thickness 10 mm).

The compounded urethane of Compounding Example 2 shown in Table 1 was cast to form an outer urethane layer (thickness 10 mm). The mold temperature is 110 ° C. Then, the same treatment as in Inventive Example 1 was carried out to produce a roller having an outer diameter of 125 mm and a width of 50 mm.

Comparative Example 2 In the same manner as in Inventive Example 1, the compounded urethane of Compounding Example 1 shown in Table 1 was applied between the ring 4 and the outer peripheral wall portion 16a of the mold 16A.
Then, the compounded urethane of the compounding example 2 was cast into the space B between the ring 4 and the core 15 to manufacture rollers of the same size.

-Test Method-As shown in FIGS. 3 and 4, the outer diameter of the traveling wheel 11 is 300.
Using a running tester of mm, the roller 12 manufactured as described above is brought into contact with the running wheel 11, and the running speed V = 20.
0m / min, load F = 300kgf / 1 piece, thrust angle θ = 3
It was run for 720 hours under the condition of °.

The test results are shown in Table 2 below.

[0026]

[Table 2] In the above embodiment, the case of integrally molding the roller has been described, but in addition to that, the core metal, the elastomer layer,
An adhesive may be applied between each of the metal ring and the outer layer to integrally manufacture them by adhesion,
As shown in FIG. 5, a first assembly body 23 in which an elastomer layer 22 is adhesively fixed to a cored bar 21 and a second assembly body 26 in which an outer layer 25 is adhesively fixed to a metal ring 24 are respectively provided. Manufactured by separately forming them integrally by using an adhesive, and then press-fitting the first assembly body 23 into the metal ring 24 of the second assembly body 26 and engaging with the retaining ring 27. You may do so. Incidentally, 24a and 24b are an engaging portion and an engaging groove formed in the metal ring 24, respectively.

Although the above embodiment is an example applied to a roller, it may be applied to other rollers such as a solid tire and casters, and a bearing may be used instead of the core metal.

[0028]

As described above, according to the first aspect of the present invention, since the elastomer layer is interposed between the cored bar and the outer layer, the thrust force is absorbed by the deformation of the elastomer layer during running on a curved line or the like. The effect of the thrust force on the outer layer is mitigated, which is advantageous in extending the service life. Further, since the metal ring is provided between the outer layer and the elastomer layer, it is possible to increase the bonding force between the elastomer layer and the outer layer and to block the deformation of the elastomer layer without transmitting it to the outer layer. It is also advantageous in terms of extending the life.

According to the second aspect of the present invention, the elastic modulus of the material forming the elastomer layer is smaller than that of the material forming the outer layer, so that the thrust force can be effectively mitigated by the elastomer layer.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a roller.

FIG. 2 is an explanatory diagram of a manufacturing method.

FIG. 3 is a schematic side view of a running test machine.

FIG. 4 is a schematic front view of a running test machine.

FIG. 5 is an explanatory diagram of another embodiment.

FIG. 6 is a view similar to FIG. 1 for a conventional example.

[Explanation of symbols]

 1 roller 2,21 core metal 3,22 elastomer layer 4,24 metal ring 5,25 outer layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B29K 105: 22

Claims (2)

[Claims] 1. A roller having an outer layer made of urethane, rubber, or resin provided on the outside of a cored bar or bearing, a roller such as a solid tire, the urethane being adhered to an outer peripheral portion of the cored bar or bearing,
A roller, comprising: an elastomer layer made of rubber or the like; and a ring having rigidity, which is firmly bonded to the outer peripheral portion of the elastomer layer and has the outer layer bonded to the outer peripheral portion. 2. The rollers according to claim 1, wherein the elastic modulus Ee of the material forming the elastomer layer and the elastic modulus EG of the material forming the outer layer have the following relationship. Ee ≤ EG