JP2001248686A - Vibration isolator for mounting on construction machine and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration isolator for mounting on a construction machine and the like that is structurally simple, free of torsion out of a given range, appreciably safe, and inexpensive. SOLUTION: Frames 4 and 5 each comprise a base member 2 and a pair of raised tongues 3 raised in opposed relation from the longitudinal middles of the base member on both sides. The two frames are arranged crisscross with the raised tongue sides facing each other, and then covered with an elastic member 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device, and more particularly to an anti-vibration device capable of preventing a twist exceeding a predetermined range, and to a vibration isolator attached to a construction machine or the like.

[0002]

2. Description of the Related Art A construction machine for leveling, for example, a rammer, includes a vibrating portion, a leveling portion provided below the vibrating portion, and a handle portion provided above or at an intermediate portion of the vibrating portion. It is configured. A vibration isolator made of a disk-shaped vibration isolating rubber is interposed between the vibrating portion and the handle portion, and the vibration from the vibrating portion is directly transmitted to the handle portion by the vibration isolator. There is known an apparatus which is formed so as to prevent the occurrence of the phenomenon and prevents a person who has been involved in the work for a long time from modulating the body under the influence of vibration.

[0003]

However, in the conventional vibration isolator interposed between the vibrating portion and the handle portion of the rammer as described above, the conventional vibration isolator is formed of a disk-shaped rubber vibration isolator. Therefore, in the process of performing the leveling operation using the rammer, there was a problem in preventing transmission of vibration. Also, when moving the rammer on a stepped place or an inclined road in the ascending direction, push the handle part downward to slightly raise the tip of the leveling part provided at the lower part of the vibrating part. However, when performing such an operation, the rammer is too heavy to raise the tip of the leveling part unless the handle is lowered unnecessarily to maximize the torsion of the vibration isolation rubber. In addition to the problem that the vibration-proof rubber cannot be twisted more than the allowable range, the vibration-proof rubber has a problem that the pain of the vibration-proof rubber is accelerated and the screw is cut off. Lowering the handle of the rammer more than necessary causes the center of gravity of the rammer itself to become unstable and unstable, and there is also a problem in safety because the rammer is heavy and there is no danger of falling down. Was.

Recently, by using a shock absorber or attaching a bumper rubber to the outside, the tip of the leveling portion provided at the lower portion of the vibrating portion can be raised without lowering the handle portion more than necessary, in addition to preventing vibration. Although it is possible to move the rammer in a stepped area or in an upward direction on a sloping road, such a structure can be cumbersome and costly. And so on.

The present invention solves such a problem, and has a particularly simple structure, is capable of preventing twisting beyond a predetermined range, and is used for a low-cost construction machine excellent in safety. It is an object to propose an anti-vibration device.

[0006]

As a means for solving the above-mentioned problems, a vibration isolator attached to a construction machine or the like according to the present invention comprises an aggregate consisting of a base member and both longitudinal sides of the base member. It is formed by a pair of rising pieces that are erected so as to face the central part, and two of these aggregates are arranged in a cross shape with one rising side facing each other, and the aggregate is covered with an elastic member. It is characterized by having been formed.

Further, the elastic member coated with the aggregate may be formed in a substantially cross-shaped girder shape in plan view.

Further, the rising piece may be formed in a substantially C-shape in a plan view that is curved inward.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a vibration isolator attached to a construction machine or the like according to the present invention. The vibration isolator 1 is a construction machine for leveling the ground as shown in FIG. That is, it is attached to the rammer 10 and used.

The vibration isolator 1 has a substantially rectangular base member 2 as shown in FIGS. 3A and 3B, and is bent inwardly so as to face the center of both sides of the base member 2 in the longitudinal direction. Metal aggregates 4 and 5 formed by a pair of rising pieces 3 having a substantially C shape in a plan view are arranged in a cross shape with the rising pieces 3 facing each other, and FIG.
As shown in FIG. 2, the base member 2 forming the aggregates 4 and 5 is covered with an elastic member 6 made of rubber so as to expose the surface 2a of the base member 2 so as to be substantially cross-shaped in plan view.

As shown in FIG. 2, both sides of the elastic member 6 covering the aggregates 4 and 5 arranged in a cross shape in a substantially cross-girder shape in plan view from the portions located slightly above the center. An inclined surface 6a that is inclined inward is formed, and an inclined surface 6b that is inclined inward from a portion located slightly below the center portion is formed on the front and rear surfaces.

Next, when the vibration isolator 1 is formed, it may be performed by a conventionally known method. in short,
As shown in FIG. 3b, the two aggregates 4, 5 are arranged in a mold (not shown) in a state of being arranged in a cross shape with their rising pieces 3 facing each other. The elastic member 6 made of rubber may be injected and solidified by predetermined means such as injection molding. Thereby, the vibration isolator 1 can be formed as shown in FIG.

In the above, near the longitudinal ends 2b of the base member 2 forming the aggregates 4, 5, the aggregates 4, 5
When it is covered in a substantially cross-girder shape in plan view, it is located in an exposed state from the space 7 formed in the elastic member 6. Bolt holes 8 are formed in the vicinity of both longitudinal ends 2b of the base member 2, respectively.

According to the vibration isolator 1 attached to a construction machine or the like having the above-described configuration, the base member 2 and the pair of rising pieces 3 erected so as to face central portions on both sides in the longitudinal direction of the base member 2. The two metal aggregates 4 and 5 formed by the above are arranged in a cross shape with their rising pieces 3 facing each other, and the aggregates 4 and 5 are substantially cross-shaped in plan view by an elastic member 6 made of rubber. Since it is a simple structure formed by covering in a shape, it is possible to provide a product which is easy to manufacture and inexpensive and can obtain a sufficient vibration damping effect.

The two aggregates 4 and 5 covered by the elastic member 6 are provided with a pair of rising members provided on the two aggregates 4 and 5 when the elastic member 5 twists more than necessary. The pieces 3 serve as stoppers to prevent the twist.

The two aggregates 4, 5 are not necessarily limited to metal, but may be hard resin or the like. The elastic member 5 is not necessarily limited to rubber, but may be soft resin, synthetic rubber, or the like. Further, the shape of the elastic member 6 covering the two aggregates 4 and 5 is not necessarily limited to a substantially cross-girder shape in plan view, and may be a circular shape or a square shape in plan view.

Next, FIG. 4 shows a use example in which the vibration damping device 1 according to the present invention is attached to a rammer 10 of a construction machine for leveling the ground. A leveling section 12 provided below the vibrating section 11, and a grip section 1 provided above the vibrating section 11.
3 mainly. In addition, a pair of mounting plates 16 for mounting the vibration isolator 1 are vertically provided at a lower portion near the front of the handle 13. Since the structure of the rammer 2 is well known, a detailed description thereof will be omitted here.

The vibration isolator 1 is interposed between the vibrating part 11 of the rammer 10 and the handle part 13 and attached. That is, two longitudinal ends 2 of the base member 2 forming the aggregate 5 of the vibration isolator 1
b is screwed to the side surface of the vibrating part 11 by a screw 15, and both longitudinal ends 2 b of the base member 2 forming the aggregate 4 are screwed by a screw 17 to a mounting plate 16 vertically suspended near the front of the handle 13. do it. Thereby, the rammer 10
The vibration isolator 1 can be easily attached between the vibrating part 11 and the handle part 13.

When the ground leveling operation is performed using the rammer 10 to which the vibration isolator 1 is attached, when the rammer 10 is to be moved to a stepped portion or an inclined road in an upward direction. The tip of the leveling part 12 provided at the lower part of the vibrating part 11 can be easily raised simply by slightly pushing the handle part 13 downward, so that the movement can be performed quickly.

When the handle 13 is lowered by disposing the two aggregates 4 and 5 in a cross shape in the elastic member 6, a pair of rising pieces provided on the two aggregates 4 and 5 are provided. The three members serve as stoppers and prevent the twisting more than a predetermined amount, whereby the stability of the rammer 10 can be obtained, and the elastic member 6 can be prevented from being twisted.

Further, since the two aggregates 4 and 5 in the elastic member 5 do not contact each other at all, it is possible to reliably prevent the vibration of the vibrating portion 11 from being directly transmitted to the handle portion 13. .

Next, FIG. 5 shows another embodiment of the vibration isolator 1, which comprises a base member 2 having a substantially rectangular shape as shown in FIGS. And a pair of rising pieces 3 having a substantially C-shape in a plan view, which are curved inward and which are erected so as to face both sides of a convex protrusion 18 formed on the upper surface of the central portion. Aggregate 4,
The elastic members 6 made of rubber are arranged in a cross shape with the rising pieces 3 facing each other, so that the longitudinal ends 2b of the base member 2 forming the aggregates 4 and 5 are exposed.
It is formed so as to cover in a substantially girder shape in plan view.

In this embodiment, the same effect as described above can be obtained. Further, by interposing the vibration isolator 1 between the vibrating portion 11 of the rammer 10 and the handle portion 13 as shown in FIG. 4, the same effect as described above can be obtained.

In the other embodiment, FIG.
4 to 4 denote the same parts, and a description thereof will be omitted.

[0026]

As described above, according to the vibration isolator attached to a construction machine or the like according to the present invention, the base member and the base member are erected so as to face the central portions on both sides in the longitudinal direction of the base member. An aggregate is formed by the pair of rising pieces, and two of the aggregates are arranged in a cross shape with the rising sides facing each other, and the aggregate is formed by being covered with an elastic member. It is simple and the cost can be kept low, and a sufficient anti-vibration effect can be obtained.

Also, since the two aggregates arranged in a cross shape with the rising sides facing each other in the elastic member do not come into contact with each other, specifically, the vibration isolator is, for example, provided with a vibrating portion of a rammer and a handle. By interposing and attaching the vibrating portion to the handle portion, the vibration of the vibrating portion can be reliably prevented from being directly transmitted to the handle portion. When the handle of the rammer is lowered, the rising pieces provided on the base members of the two aggregates function as stoppers, and it is possible to prevent the vibration isolator from twisting more than a predetermined amount. In addition to obtaining the stability of the elastic member, it is possible to prevent the elastic member from being twisted off in addition to the fact that the elastic member can be prevented from falling down.

[Brief description of the drawings]

FIG. 1A is a front view of a vibration isolator attached to a construction machine or the like according to the present invention, FIG. 1B is a plan view of the vibration isolator, and FIG.

FIG. 2 is a perspective view of the vibration isolator.

3A is an exploded view of two aggregates, and FIG. 3B is an assembled view of two aggregates.

FIG. 4 is an explanatory view of assembly in a state where the vibration isolator is attached to a rammer.

FIG. 5 is a perspective view of another example of a vibration isolator.

6A and 6B are an exploded view and an assembled view of two aggregates of another example of the vibration isolator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vibration isolator 2 Base member 3 Rising piece 4, 5 Aggregate 6 Elastic member

Claims (3)

[Claims] 1. An aggregate is formed by a base member and a pair of rising pieces which are erected so as to face central portions on both sides in the longitudinal direction of the base member, and two of the above-mentioned aggregates rise and face one side. A vibration damping device attached to a construction machine or the like, wherein the vibration damping device is arranged in a cross shape, and is formed by covering the aggregate with an elastic member. 2. The vibration damping device according to claim 1, wherein the elastic member coated with the aggregate is formed in a substantially cross-girder shape in plan view. 3. The anti-vibration device according to claim 1, wherein said rising piece is formed in a substantially C-shape in plan view and curved inward.