JP2008175332A - Vibration-proofing member, and method of manufacturing the vibration-proofing member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive, downsized, and easy-to-work vibration-proofing member prevented from buckling, by using structure reduced in response magnification and resonance frequency at the time of resonance while using a material easy-to-attenuate for vibration. <P>SOLUTION: The vibration-proofing member 1 is made of an elastic material, forming hollow parts composed of a plurality of elongated members. The vibration-proofing member 1 made of the elastic material, forming hollow members comprise a plurality of first members 13, and second members 5 coupling the first members 13 to one another. The vibration-proofing member made of the elastic material, forming hollow members is formed into a substantial cylinder having a through-hole at a center thereof, and the through-hole is surrounded by a plurality of the hollow members. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a vibration isolating member for preventing, for example, vibration generated from a vehicle, an industrial machine, or the like or fine vibration in a building.

When mounting an information device such as a personal computer on a vehicle, a vibration isolating member is used to prevent the vibration generated in the traveling vehicle from being transmitted to the information device and generating a large acceleration in the information device. Used.

Anti-vibration characteristics to prevent large acceleration in information equipment are low response magnification at resonance,
The resonance frequency is low. Conventional anti-vibration rubber materials with low rigidity and low loss factor have been used.
JP-A-10-176729 JP-A-11-81642 JP 2002-327797 A

However, the resonance frequency could be lowered due to the low rigidity, but the response factor at the time of resonance (the acceleration of the object that prevents vibration / the outer casing on which the object that prevents vibration is mounted is low because the loss factor is low It was difficult to reduce the acceleration) (see FIGS. 11 and 12 or cited reference 3).

That is, the vibration isolating member using a material having low rigidity has a problem that vibration is hardly attenuated and vibration is hardly absorbed.

On the other hand, if a shape with a high elastic modulus and a high loss factor is used, buckling will occur, and if a member to prevent buckling is attached, it will be difficult to prevent vibration in multiple directions, making the structure complicated. As a result, the size and cost increased. Even if the shape of the vibration isolator itself is changed,
In order to use the complicated mold, for example, only one base plate can be provided.
Therefore, the present invention uses a structure that has a high elastic modulus and a high loss factor, that is, a material that easily attenuates against vibrations, but has a low response magnification and resonance frequency at the time of resonance. The object is to provide an anti-vibration member that is small in size and easy to process.

In order to solve the above problems and achieve the object, the vibration isolator of the present invention is configured as follows.

(1) The vibration isolator of the present invention is made of a material having elasticity, and in the vibration isolator forming the hollow portion,
The hollow portion is composed of a plurality of length members.

(2) The vibration isolating member of the present invention is made of a material having elasticity, and in the plurality of vibration isolating members forming the hollow portion,
It is formed in a substantially cylindrical shape having a through hole at the center, and the through hole is surrounded by a plurality of hollow portions.

According to the present invention, it is possible to efficiently absorb vibration and provide an inexpensive vibration-proof member.

In the present embodiment, an information device is taken as an example for an object to which it is difficult to transmit shock and vibration, and a vehicle body is taken as an example for a vibrating surface.

A first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a perspective view of a vibration isolating member according to the present embodiment, and FIG. 2 is a plan view of the vibration isolating member viewed from the product side surface 1 in FIG. The vibration isolating member of the present embodiment includes a support portion 3 and a rib 5.

The anti-vibration member 1 having the support portion 3 is installed between the information device and the vehicle body via an attachment part. The support part 3 (member 1) has the upper surface 7 and the lower surface 9, and is each installed in the surface grounded to a target object via the member for attachment. Further, it is desirable that the rib 5 (member 2) has a triangular shape with high rigidity.

FIG. 3 is a relationship diagram of frequency and response magnification (= acceleration of an object that prevents impact of response magnification / acceleration of an outer casing on which an object that prevents impact) is mounted in the conventional and the present invention. It can be seen that the resonance frequency and the response magnification are reduced as compared with the prior art.

Next, a second embodiment of the present invention will be described. 4 is a perspective view, and FIG. 5 is a plan view.

In the present embodiment, the arrangement of the ribs and the support portions in the first embodiment is changed. First
In this embodiment, the support portions 13 are arranged at equal intervals in both the vertical direction and the horizontal direction. However, in the second embodiment, the support portions 13 are arranged only in the horizontal direction (L1, L2, L3). ). Also,
L2 support portion 1 between each of L1 support portions 13 in adjacent rows (for example, L1 and L2)
3 is installed. Further, the distance between the support portions in the same row and the distance between the support portion in the row and the support portion in the row adjacent to the row and the support portion closest to the row are equal. By arranging the support portions 13 in this way, the ribs 15 form a substantially equilateral triangle. As a result, the difference in rigidity of the support portions 13 due to the vibration in the horizontal direction can be reduced, and the effect of preventing buckling can be enhanced.

In the first embodiment and the second embodiment, the rib 5 forms a substantially triangular shape with increased rigidity, but other shapes may be used.

The number of ribs is not limited to the number shown in FIGS. The loss factor can be increased by using a material having high rigidity, and the resonance frequency and response magnification can be decreased by using the above-described structure. Therefore, a hard material such as styrene rubber or EPDM, for example, a material having an elastic modulus of 1 MPa or more can be used. Other materials may be used as long as they can be replaced. Moreover, the support part 3 and the rib 5 are the shape which can be shape | molded integrally.

In FIG. 1, the rib 5 is installed from the lower surface 9, but even if it is installed from the upper surface 7, it is effective, but if the rib 5 is installed on the side where vibration is applied, the base of the rib 5 is stabilized.
Less likely to buckle.

Next, a third embodiment will be described.

FIG. 6 is a perspective view of the vibration isolating member 51 in the present embodiment, and FIG. 7 is a plan view. Rod-shaped member 53
Indicates a state where is inserted. By providing a hollow portion in the longitudinal direction in a cylindrical shape such as rubber and making the rib 57, it is possible to provide a function of vibration isolation and buffering in the horizontal direction. Further, a through hole 55 is provided at the center of the cross section perpendicular to the longitudinal direction of the vibration isolator member, and a rod-shaped member 53 is inserted in the longitudinal direction of the cylinder. The vibration isolating member 51 and the rod-like member 53 are not fixed and can slide. 6 and 7, the vibration isolator 51 has a cylindrical shape and is provided with six substantially triangular hollow portions. The reason why the hollow portion has a substantially triangular shape is that the triangular shape can increase the rigidity as described in the first embodiment. Also, the shape of the vibration isolator 51 and the shape of the hollow part,
The number is not limited to this. Further, the vibration isolation member 51 is surrounded by a plurality of blocks 75 that can be expanded and contracted. The block 75 is fixed to the vehicle body. A block 75 is passed through a through hole provided in the support plate 71 that fixes the information device, and the block 75 can freely move with respect to the support plate 71.

The vibration isolation structure of the present embodiment will be described with reference to FIG. Two anti-vibration members 51 are used, and these are passed through the same bar-shaped member 53. The block 75 is divided into two upper and lower portions at substantially the same position as the boundary between the two vibration isolation members 51. The lower end of the rod-shaped member 53 is fixed to the vehicle body. Further, the upper surface of the rod-shaped member 53 is fixed to a plate-shaped member 73 provided so as to cover the upper surface 57 of the vibration isolating member 51.
An object for reducing vibration is placed on the support plate 71, and both end portions thereof are inserted and fixed between the two vibration isolating members 51 and between the blocks 75 divided vertically.

Next, the shape change of the vibration isolation member 51 when vibration occurs will be described. FIG. 9 shows the movement of the vibration isolation member 51 due to the vibration in the vertical direction. First, when the vehicle body receives an impact or vibration, the rod-like member 53 fixed to the vehicle body and the plate-like member 73 fixed to the block 75 or the rod-like member 53 are subjected to vibration. Due to the influence of these vibrations, the support plate 71 fixed to the information device also receives vibrations. The support plate 71 receives vibration through a vibration isolating member. In this case, one of the vibration isolating members 51 divided into the upper and lower parts extends in the vertical direction, and the other contracts.

FIG. 10 shows the movement of the vibration isolation member 51 due to the vibration in the horizontal direction. The case where acceleration is applied to the vehicle body in the direction of arrow A is taken as an example. When acceleration is applied to the vehicle body in the direction of arrow A, the left and right portions of the block 75 in contact with the vibration isolating member 51, the vehicle body, and the plate-like member 73 move in the direction of arrow B. Further, the left side of the vibration isolating member 51 is affected by the movement of the block 75 in the arrow B direction, and is affected in the arrow B direction. As a result, the vibration to the support plate 71 is buffered by the vibration isolation member 51, and as a result, the vibration received by the information device fixed to the support plate 71 is reduced.

As described in the background art, the present invention is aimed at mitigating vibrations when an information device is mounted on a vehicle body. However, the present invention can be applied to other fields such as earthquake resistance and seismic isolation of a house.

Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

The perspective view of the vibration isolator which concerns on embodiment of this invention. The top view of the vibration isolator which concerns on embodiment of this invention. The related figure of the frequency and response magnification in the past and this invention. The perspective view of the vibration isolator which concerns on embodiment of this invention. The top view of the vibration isolator which concerns on embodiment of this invention. The perspective view of the vibration isolator which concerns on embodiment of this invention. The top view of the vibration isolator which concerns on embodiment of this invention. Sectional drawing at the time of use of the vibration isolator which concerns on embodiment of this invention. Sectional drawing at the time of use of the vibration isolator which concerns on embodiment of this invention. Sectional drawing at the time of use of the vibration isolator which concerns on embodiment of this invention. The perspective view of the vibration isolator which concerns on the conventional embodiment. The figure which shows the relationship between a vibration frequency and a vibration transmissibility in the vibration isolator and the comparison member which concern on the conventional embodiment.

Explanation of symbols

3, 13 ... support parts 5, 15, 55 ... ribs

Claims (7)

In a vibration isolating member made of a material having elasticity and forming a hollow portion,
The vibration-proof member, wherein the hollow portion is composed of a plurality of members. In a vibration isolating member made of a material having elasticity and forming a hollow portion,
A plurality of first members;
An anti-vibration member comprising: a second member for connecting the first members to each other. The vibration isolating member according to claim 1, wherein the hollow portion is a polygon. The vibration isolating member according to claim 3, wherein the polygon is a substantially equilateral triangle. In a plurality of vibration isolating members made of a material having elasticity and forming a hollow portion,
A vibration-proof member, which is formed in a substantially cylindrical shape having a through hole in a central portion, and is surrounded by a plurality of hollow portions. The vibration-proof member according to claim 1, wherein the material has rigidity and an elastic modulus of 1 MPa or more. 6. The method of manufacturing a vibration isolating member according to claim 1, wherein the vibration isolating member is formed by integral molding.

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