JPH07127687A - Vibration preventing device - Google Patents

Abstract

PURPOSE:To efficiently absorb vibration so as to effectively shut off the transmission of vibration. CONSTITUTION:The bottom surface of a cylindrical hollow resilient, base incorporated in an attaching container 2 fixed on a base l, is secured by means of a viscoelastic adhesive. The cylindrical hollow resilient base is divided into a plurality of segments 3a, 3b, 3c between which vibration damping metal plates 3a, 3b, 3c are inserted and bonded by the resilient adhesive, and further, a vibration damping metal plate 4c is bonded to the topmost surface thereof. Further, a load receiver 6 is fixed at the center of the upper part of the vibration damping plate 4c. With this arrangement, it is possible to absorb vibration externally applied to the load receiver 6 or the base 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration system for use in, for example, floor dampers for buildings, dampers for bridges, precision measuring instruments, dampers for machine tools, and pedestals for other types of vibration generators. It relates to the device.

[0002]

2. Description of the Related Art Conventionally, in this type of vibration damping device, a cushioning member made of an elastic material such as rubber is interposed between a vibration transmitting side and a vibration receiving side to absorb the vibration. Those that have been widely used.

[0003]

However, the conventional vibration isolator using the elastic material has a problem that the vibration cannot be efficiently blocked because the vibration cannot be sufficiently absorbed. Further, it is difficult to obtain a structurally sufficient strength against a strong vibration repeatedly applied, so that there is a problem in durability and the like.

Accordingly, the present applicant has already filed Japanese Utility Model Application No. 3-100.
In No. 978, a vibration-damping device including a cylindrical hollow elastic pedestal and a vibration-damping metal plate provided on the hollow pedestal was proposed, but the ideal vibration-damping property could not be obtained yet.

The object of the present invention is to solve the above problems,
An object of the present invention is to provide an anti-vibration device that can obtain appropriate rigidity and vibration absorption and efficiently isolate vibration.

[0006]

A vibration isolator according to the present invention for achieving the above object comprises a cylindrical hollow elastic pedestal made of an elastic body disposed on a base, and an upper surface of the hollow elastic pedestal. A vibration-damping device having a receiving portion made of a vibration-damping metal plate adhered to the center of the receiving portion, the hollow elastic pedestal being horizontally divided into a plurality of portions. It is characterized in that a damping metal plate is inserted into the laminated structure.

[0007]

According to the vibration isolator having the above structure, the hollow elastic pedestal is divided into a plurality of parts, and the damping metal plate is inserted between them to form a laminated structure, and the damping metal plate is further provided on the uppermost surface thereof. By adhering the receiving portion made of, a synergistic effect of appropriate rigidity and vibration absorption is produced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on the illustrated embodiments. FIG. 1 is a sectional view of an embodiment of a vibration isolator according to the present invention,
FIG. 2 shows a plan view. Inside the cylindrical mounting container 2 fixed on the base 1, a cylindrical hollow elastic pedestal 3a made of, for example, natural rubber or synthetic rubber such as neoprene is arranged. The bottom surface is fixed to the container 2 with a polymer adhesive having viscoelasticity. On the upper surface of the hollow elastic pedestal 3a,
For example, a vibration-damping metal plate 4a having an appropriate shape such as a ring shape or a disk shape is adhered, and a hollow elastic pedestal 3b, a vibration-damping metal plate 4b, and a hollow elastic pedestal 3c are sequentially laminated on the upper layer via a viscoelastic adhesive. The vibration damping metal plate 4c having, for example, a cross shape is adhered to the uppermost surface thereof. In addition, the damping metal plates 4a, 4
As b and 4c, for example, a non-ferrous metal or a synthetic resin material is adhered to a steel plate or other metal plate to efficiently absorb vibration. In addition, the damping metal plates 4a, 4
The shapes of b and 4c and the number of stacked layers can be arbitrarily selected, and the most efficient condition can be selected according to the vibration state.

A load receiver 6 is provided at the center of the upper surface of the vibration damping metal plate 4c, and covers the laminated structure composed of the hollow elastic pedestals 3a, 3b, 3c and the vibration damping metal plates 4a, 4b, 4c in a non-contact state. Thus, the cover 5 is fixed on the mounting container 2. Alternatively, the cover 5 may be separated from the mounting container 2 and mounted on the uppermost damping metal plate 4a without any problem. An object to be supported, for example, an object such as a building or a precision measuring machine that dislikes vibration, or an object that generates vibration, such as a motor or a washing machine, is fixed to the load receiver 6, and its load is fixed. It is designed to be received. In order to mount an object to be supported on the load receiver 6, the load receiver 6 is used in the embodiment.
Although the bolt hole 7 is provided in the above, the object may be attached to the load receiver 6 itself by other attaching means.

Further, a slight gap is provided between the outer peripheral surfaces of the hollow elastic pedestals 3a, 3b, 3c and the damping metal plates 4a, 4b, 4c and the inner peripheral surface of the mounting container 2 so as not to contact each other. , The hollow elastic pedestals 3a, 3b, 3c are damping metal plates 4
Without being restricted by the mounting container 2 and the cover 5 together with a, 4b, and 4c, they can be elastically deformed freely.
In addition, through holes are appropriately provided in the vibration damping metal plates 4b and 4c so that the inside of the hollow elastic pedestal 3 is not sealed.

Therefore, in the vibration isolator according to the present invention, when an object that generates vibration such as a motor or a washing machine is mounted on the load receiver 6, the vibration is generated by the load receiver 6.
From the hollow elastic pedestals 3a, 3b, 3c and the damping metal plates 4a, 4b, 4c to the base 1,
In this transmission process, the vertical and horizontal components of vibration are generated by the elastic deformations of the laminated hollow elastic pedestals 3a, 3b, 3c, the damping metal plates 4a, 4b, 4c, and the viscoelastic adhesive in the vertical and horizontal directions. Sequentially absorbed, base 1
Almost no vibration is transmitted to.

Further, even when an object such as a building or a precision measuring instrument which does not like vibration is attached on the load receiver 6, the vibration applied to the base 1 by an external force such as an earthquake is similarly laminated structure. Is absorbed by the elastic deformation and vibration absorbing action of the hollow elastic pedestals 3a, 3b, 3c and the damping metal plates 4a, 4b, 4c and the viscoelastic adhesive, and is hardly transmitted to the object attached to the load receiver 6.

In this case, the hollow elastic pedestals 3a, 3b, 3
By forming c and the vibration-damping metal plates 4a, 4b, and 4c into a laminated structure, an appropriate rigidity is generated, and even a heavy object or the like is prevented from falling sideways due to deformation, and the resonance frequency can be suppressed to a considerably low level.

[0014]

As described above, the vibration isolator according to the present invention has a laminated structure in which a cylindrical hollow elastic pedestal is divided into a plurality of parts, and a damping metal plate is inserted between them, and is bonded to the uppermost surface thereof. By virtue of the receiving part made of the vibration-damping metal plate, a synergistic effect of appropriate rigidity and vibration absorption occurs, the resonance frequency is suppressed to a low level, and vibration applied to the base or vibration applied to the center of the vibration-damping metal plate Since almost all of the vibrations can be absorbed, it is possible to obtain extremely efficient vibration damping characteristics.

[Brief description of drawings]

FIG. 1 is a sectional view of an example.

FIG. 2 is a plan view with a cover removed.

[Explanation of symbols]

 1 base 2 mounting container 3a, 3b, 3c hollow elastic pedestal 4a, 4b, 4c damping metal plate 5 cover 6 load receiver

Claims (1)

[Claims] 1. A cylindrical hollow elastic pedestal made of an elastic body disposed on a base, and a receiving portion made of a damping metal plate adhered to an upper surface of the hollow elastic pedestal, the center of the receiving portion being provided. An anti-vibration device for applying a load to a portion, wherein the hollow elastic pedestal is horizontally divided into a plurality of parts, and a vibration-damping metal plate is inserted between the parts to form a laminated structure. .