JP2002089545A - Vibration-proofing roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration-proofing roller capable of minimizing a flat spot generating at the portion of the roller pressed against a mating member, even if that portion is kept pressed against the mating member over a long time. SOLUTION: A rigid ring 13 is coaxially and integrally embedded into an annular elastic member 12 and the outer peripheral surface 13a of the rigid ring 13 is brought close to the outer peripheral rolling surface 14 of the elastic member 12, whereby the portion of the elastic member 12 located on the outer periphery of the ring 13 has its wall thickness t2 reduced to reduce the radial deflection thereof. Thus, even if the same portion of the outer peripheral rolling surface 14 is kept pressed against a mating member C over a long time, a flat spot generating there can be minimized. Since the support part 17 of the elastic member 12 located on the inner periphery of the ring 13 permits radial displacement of the ring 13, the vibration-proofing function of the roller is not impaired.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration roller which is a rotary roller having an anti-vibration function, and more particularly, to a flat spot generated at a location where the same location is pressed against a partner member for a long time. The present invention relates to a technique for improving an anti-vibration roller so that it can be minimized.

[0002]

2. Description of the Related Art Conventionally, anti-vibration rollers as shown in FIG. 6 have been used for step rollers of an escalator, guide rollers for guiding the elevator up and down, wheels of various bogies, and power transmission wheels in general industrial equipment. Vibration caused by rolling is buffered and noise is prevented.

[0003] In the vibration isolating roller 1 shown in FIG. 6, an annular elastic member 3 made of a vibration isolating rubber having a thickness t1 in a radial direction is coaxially and integrally arranged on the outer periphery of a ring hub member 2 made of metal. It is mounted on the support shaft S via the bearing B, and rolls with the outer peripheral rolling surface 4 of the annular elastic member 3 pressed against the surface of the mating member C.

[0004]

In the anti-vibration roller 1 shown in FIG. 6, the thickness t1 in the radial direction of the annular elastic member 3 is large in order to enhance the anti-vibration function. As described above, when rolling on the surface of the counterpart member C, the value of the radial deflection δ1 generated on the outer peripheral rolling surface 4 of the annular elastic member 3 is large.

Thus, the same portion of the outer peripheral rolling surface 4 of the annular elastic member 3 is pressed against the surface of the mating member C for a long time like a guide roller when the elevator stops for a long time. Is continued, the annular elastic member 3 is deformed, and a flat spot 4a having a length L1 is generated on the outer peripheral rolling surface 4.

The flat spot 4a disappears spontaneously with the rotation of the anti-vibration roller 1, and the annular elastic member 3 is restored to its original perfect circular shape. When the motor rotates, large vibration and noise are generated. In particular, when the air temperature is low, the flat spot 4a does not easily disappear, so that the generation of large vibration and noise continues to be undesirable.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a vibration-proof roller capable of minimizing a flat spot generated at the same location even when the same location is pressed against a partner member for a long time. To provide.

[0008]

According to a first aspect of the present invention, there is provided an anti-vibration roller comprising: an annular hub member; and an annular elastic member coaxially and integrally disposed on the outer periphery of the hub member. An annular rigid ring coaxially and integrally embedded inside the elastic member, the annular ring having an outer peripheral surface extending close to the outer peripheral rolling surface of the elastic member. The elastic member has a support portion for supporting the rigid roller while allowing the rigid ring to be displaced in the radial direction, on the inner peripheral side of the rigid ring.

That is, in the vibration isolating roller according to the present invention, the rigid ring is coaxially and integrally embedded inside the elastic member so that the outer peripheral surface thereof is close to the outer peripheral rolling surface of the elastic member. The thickness of the portion of the member located on the outer peripheral side of the rigid ring is thin, and the bending in the radial direction can be reduced. Thereby, even if the same location on the outer peripheral rolling surface of the vibration isolating roller according to the present invention is pressed against the partner member for a long time, a flat spot generated at that location can be suppressed to a minimum. On the other hand, since the support portion of the elastic member located on the inner peripheral side of the rigid ring allows the rigid ring to be displaced in the radial direction, the vibration isolating function of the entire vibration isolating roller is not impaired. The rigid ring is set so as to have such rigidity that the perfect circular shape can be maintained even if a radial external force is applied to one location in the circumferential direction. Further, the rigid ring can be formed at the same time as the elastic member is formed, or can be later fitted into a groove formed in the elastic member.

[0010] In the anti-vibration roller according to the second aspect,
The support portion for supporting the rigid ring has a pair of annular concave grooves formed on both sides in the axial direction of the elastic member.
Thereby, the deformation that the width of the concave groove is expanded or narrowed allows the support portion to easily displace the rigid ring in the radial direction, so that the vibration isolation function can be further enhanced. By providing a plurality of through-holes that penetrate the support section in the axial direction, the rigidity of the support section can be set optimally.

[0011] In the vibration isolating roller according to the third aspect,
A plurality of rigid rings are juxtaposed at intervals in the axial direction.
Accordingly, since each rigid ring can be individually displaced in the radial direction, even when the elastic member rolls while tilting on the surface of the mating member when the outer peripheral rolling surface of the elastic member is wide in the axial direction, The outer peripheral rolling surface can be securely brought into close contact with the surface of the mating member to improve its durability.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a vibration-proof roller according to the present invention will be described in detail with reference to FIGS.
In the following description, the same reference numerals are used for the same parts as the above-described conventional technology, and the description thereof will be omitted. The radial direction will be referred to as the vertical direction, and the direction of the rotation axis will be referred to as the horizontal direction.

First Embodiment First, a vibration-proof roller according to a first embodiment of the present invention will be described with reference to FIGS.

The anti-vibration roller 10 shown in FIGS.
An annular elastic member 12 made of a vibration isolating rubber is coaxially and integrally disposed around the outer periphery of a stepped cylindrical hub member 11 made of steel, and a steel cylindrical rigid ring 13 is provided inside the elastic member 12. Are coaxially and integrally embedded.

The outer dimensions of the rigid ring 13 are determined so that the value of the radial dimension t2 between the outer peripheral surface 13a and the outer peripheral rolling surface 14 of the annular elastic member 12 is 1-2 mm. I have. Thereby, the thickness of the portion of the elastic member 12 located on the outer peripheral side of the rigid ring 13 becomes 1
3 mm, the radial deflection generated on the outer peripheral rolling surface 14 when the anti-vibration roller 10 of the first embodiment is pressed against the counterpart member C as shown in FIG. 7 in the conventional anti-vibration roller 1 shown in FIG.
Significantly smaller than 1. Therefore, even if the same location on the outer peripheral rolling surface 14 of the vibration isolating roller 10 of the first embodiment is pressed against the partner member C for a long time, the length of the flat spot 14a generated at that location is L2. 7 shows a flat spot 4 in the conventional vibration isolating roller 1 shown in FIG.
The length can be suppressed to a minimum as compared with the length L1.

Further, as shown in FIG.
The width of 3 is smaller than the width dimension W of the outer peripheral rolling surface 14. As a result, the outer peripheral corners of the rigid ring 13 are completely covered by the elastic member 12, so that even when the vibration-proof roller 10 is inclined and pressed against the surface of the mating member C, the rigid ring 13 is No direct contact with

On the other hand, the elastic member 12 has a wide base 1.
5 is vulcanized and bonded to the outer peripheral surface of the hub member 11,
On both sides in the axial direction, a pair of left and right concave grooves 16 has a support portion 17 coaxially recessed. Accordingly, the support portion 17 can easily displace the rigid ring 13 in the radial direction by the deformation in which the width of the concave groove 16 is increased or decreased, so that the vibration isolating function of the vibration isolating roller 10 is further enhanced. be able to. Further, the portion of the elastic member 12 in which the rigid body ring 13 is buried can be displaced in the axial direction by the action of the pair of left and right concave grooves 16. Adhesion can be made more reliably.

Further, the rigid ring 13 has such an overall rigidity that the perfect circular shape can be maintained even when a radial external force is applied to one location in the circumferential direction. As a result, when the lower portion 12a shown in the figure is compressed in the radial direction as shown in FIG. 3, the upper portion 12b of the elastic member 12 expands in the radial direction, and at the same time, the left portion 12c shown in FIG. Since both the right and left portions 12d are sheared, the applied external force in the radial direction can be reliably buffered.

That is, the anti-vibration roller 1 of the first embodiment
0, the radial external force applied to one location in the circumferential direction can be received by the entire elastic member 12 in the circumferential direction. Even if the wall thickness is thin, the vibration-proof function does not decrease. In addition, since the flat spot 14a generated on the outer peripheral rolling surface 14 can be minimized, the mating member C in a state where the flat spot 14a is generated.
In addition to minimizing the generation of vibration and noise when rolling on the surface of the flat surface, the flat spot 14a can be eliminated quickly.

Second Embodiment A vibration isolating roller 20 according to a second embodiment shown in FIG. 4 has an annular elastic member 22 made of vibration isolating rubber coaxially around the outer periphery of a stepped cylindrical hub member 21 made of steel. And while being arranged integrally,
A pair of left and right rigid cylindrical members 23 made of steel are embedded in the elastic member 22 coaxially and integrally at an interval in the axial direction.

That is, in the case of an anti-vibration roller in which the outer peripheral rolling surface of the elastic member has a large width, when the roller rolls while being inclined with respect to the surface of the partner member, only a part of the outer peripheral rolling surface in the width direction becomes the partner. Durability may be reduced due to being pressed against the surface of the member.

At this time, the anti-vibration roller 20 of the second embodiment
Since the rigid ring 23 is divided into two in the axial direction, the pair of right and left rigid rings 23 can be individually displaced in the radial direction. Thus, in the vibration-proof roller 20 of the second embodiment in which the width of the outer peripheral rolling surface 24 of the elastic member 22 is wide, even if the outer peripheral rolling surface 24 Can be surely brought into close contact with the surface of the mating member, and the durability does not decrease.

Third Embodiment A vibration isolating roller 30 according to a third embodiment shown in FIG. 5 has a ring-shaped elastic member 32 made of vibration isolating rubber coaxially around the outer periphery of a stepped cylindrical hub member 31 made of steel. And while being arranged integrally,
A steel rigid ring 33 is coaxially and integrally embedded inside an elastic member 32.

At this time, the outer peripheral rolling surface 34 of the elastic member 32
Are curved in an arc shape and follow the inclination of the surface of the mating member. Along with this, the rigid ring 33 also has an arc-shaped cross-sectional shape, and the value of the distance between the outer peripheral surface 33a and the outer peripheral rolling surface 34 is maintained at 1 to 2 mm. Therefore, according to the anti-vibration roller 30 of the third embodiment, even if any part of the outer peripheral rolling surface 34 is to be stopped for a long time in a state of being in contact with the surface of the mating member, the flat surface generated at that part Spots can be minimized.

As mentioned above, each embodiment of the vibration-proof roller according to the present invention has been described in detail. However, it is needless to say that the present invention is not limited to the above-described embodiment, and various modifications are possible. For example, in the above-described embodiment, the support portion provided on the elastic member is formed solid, but by forming the support member hollow, the rigid ring can be more easily displaced in the radial direction. The rigid ring can be formed not only of a metal material but also of, for example, a resin material or a rubber material.

[0026]

As is apparent from the above description, in the vibration damping roller of the present invention, the rigid ring is coaxially and integrally embedded inside the annular elastic member, and the outer peripheral surface of the rigid ring is rolled around the elastic member. By bringing the elastic member close to the moving surface, the thickness of a portion of the elastic member located on the outer peripheral side of the rigid body ring is reduced, and the bending in the radial direction is reduced. Thereby, even if the same location on the outer peripheral rolling surface of the vibration-proof roller of the present invention is pressed against the partner member for a long time, the flat spot generated at that location can be minimized. In addition, since the support portion of the elastic member located on the inner peripheral side of the rigid ring allows the rigid ring to be displaced in the radial direction, the vibration isolating function of the entire vibration isolating roller is not impaired. In addition, since the rigid ring can be easily displaced in the radial direction by forming a concave groove in the support portion of the elastic member, the vibration isolating function can be further enhanced. Furthermore, since a plurality of rigid rings are embedded at intervals in the axial direction, each rigid ring can be individually displaced in the radial direction, so that the outer peripheral rolling surface of the elastic member is wide in the axial direction, and Even when rolling is performed on the surface of the member, the outer peripheral rolling surface can be securely brought into close contact with the surface of the mating member.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a main part of an anti-vibration roller of a first embodiment according to the present invention in a cutaway manner.

FIG. 2 is an overall longitudinal sectional view of a vibration-proof roller according to the first embodiment of the present invention.

FIG. 3 is a side view showing the operation of the vibration-proof roller of the first embodiment.

FIG. 4 is a half sectional view showing a vibration-proof roller according to a second embodiment of the present invention.

FIG. 5 is a half sectional view showing a vibration-proof roller according to a third embodiment of the present invention.

FIG. 6 is an overall vertical cross-sectional view of a conventional anti-vibration roller.

FIG. 7 is a side view showing the operation of the conventional anti-vibration roller shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conventional anti-vibration roller 2 Annular hub member 3 Annular elastic member 4 Outer rolling surface 4a Flat spot 10 Anti-vibration roller of 1st embodiment 11 Hub member 12 Elastic member 13 Rigid ring 14 Outer rolling surface 14a Flat spot 15 Base Reference Signs List 16 concave groove 17 support portion 20 anti-vibration roller 21 of second embodiment 21 hub member 22 elastic member 23 rigid ring 24 outer peripheral rolling surface 30 anti-vibration roller of third embodiment 31 hub member 32 elastic member 33 rigid ring 34 outer peripheral roller Moving surface

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3J103 AA01 AA14 AA24 AA32 AA41 AA71 BA34 BA41 CA25 CA35 FA03 FA12 GA02 GA32 GA37 GA52 GA76 HA01 HA03 HA05 HA15 HA32 HA53

Claims (3)

[Claims] 1. An annular hub member, an annular elastic member disposed coaxially and integrally with the outer periphery of the hub member, and an outer peripheral surface extending close to an outer peripheral rolling surface of the elastic member. An annular rigid ring coaxially and integrally embedded in an elastic member, wherein the elastic member supports the rigid roller while supporting the rigid roller while allowing radial displacement of the rigid ring. A vibration isolating roller, which is provided on the inner peripheral side of the roller. 2. The anti-vibration roller according to claim 1, wherein the support portion has a pair of annular concave grooves coaxially recessed on both axial side surfaces of the elastic member. 3. The anti-vibration roller according to claim 1, wherein a plurality of said rigid rings are arranged side by side at intervals in an axial direction.