JPH09119478A - Anti-vibration / vibration isolation device - Google Patents

Abstract

(57) [Abstract] (Correction) [Problem] The conventional anti-vibration rubber interposition method has a small effect of isolating the low-frequency region, and if the rubber is softened, the support in the steady state becomes unstable. Since the air spring method is soft, a device for fixing the isolated side to the vibration side is required between the side to be excited and the side to be isolated, and a device to release the fixing device is required when an earthquake occurs. The entire device becomes large and complicated. The spring interposition method is unstable during installation because the spring constant is made small in order to cope with the low frequency range, and the effect in the low frequency range is small when the spring constant is made large. The hydraulic cylinder interposition method has problems such as deterioration of vibration isolation function and contamination due to oil leakage. SOLUTION: A table 1 on which a vibration-isolated side part is mounted is installed via a support mechanism 3 with respect to a base 2 installed on a vibration side part so that the table 1 can be moved in parallel to the vibration direction.
The vibration-excited side portion 2 and the vibration-isolated side portion 1 are connected by a vibration-isolated member 6 that causes plastic deformation when the vibration-side portion 1 is displaced by a certain amount or more with respect to the vibration-isolated side portion 2. ing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents an earthquake or vibration from a vibrating device (exciting side portion) or absorbs the vibration to provide vibration isolation to an isolated and isolated side portion (for example, measuring instruments). Relates to a vibration isolation / vibration isolation device provided to prevent transmission of vibration.

[0002]

2. Description of the Related Art This type of vibration isolation / vibration isolation device is basically constructed by interposing a vibration isolation / vibration isolation member between an excitation side portion and a vibration isolation side portion. The conventional vibration isolation / vibration isolator has a rubber intervening method and an air spring intervening method as its anti-vibration member.
89751), a method of interposing a spring spring or a leaf spring (for example, JP-A-6-159436), or a method of interposing a hydraulic cylinder (for example, JP-A-62-1).
13931) and the like.

[0003]

The vibration isolation / vibration isolation device of each of these methods is used depending on the vibration occurrence condition and the installation location condition, but each has the following problems. Specifically, in the case of a method in which rubber is interposed as the vibration isolation member, the vibration isolation effect in the low frequency region is small,
It cannot be expected to have much effect on earthquakes of several Hz. Further, if the rubber is softened for the purpose of enhancing the vibration isolation effect in the low frequency region, the support (installation) in the steady state may become unstable. Since the air spring method is also very soft, it is necessary to install a fixing device between the vibration side and the vibration-isolated side to fix the vibration-isolated side to the vibration-side. . In this case, it is necessary to add a device for instantly releasing the fixing device when an earthquake occurs, which has a drawback that the entire device becomes large, complicated and expensive. Also, in the case of the spring-spring (leaf spring) interposition method, the spring constant is made smaller in order to cope with the low frequency range like rubber, so it becomes unstable during installation, and if the spring constant is increased, the effect of the low frequency range becomes small. Further, in the case of the hydraulic cylinder intervening system, there are problems such as deterioration of the anti-vibration function due to oil leakage and contamination of the surroundings due to oil dripping. The present invention is intended to provide a vibration isolation / vibration isolation device that solves such problems.

[0004]

The vibration-damping / vibration-isolating device provided by the present invention is installed via a support mechanism so that the vibration-isolated side portion can be moved in parallel to the vibration direction with respect to the vibration side portion. In addition, the vibration-excited side portion and the vibration-isolated side portion are connected by a vibration-isolated member that causes plastic deformation when the vibration-side portion is displaced by a certain amount or more with respect to the vibration-isolated side portion due to vibration. It is a thing. With this configuration, the vibration-isolating member elastically deforms to prevent or absorb the transmission of vibration with respect to a certain displacement or less, and when the displacement exceeds a certain amount, plastic deformation occurs to absorb the vibration.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A concrete example of an embodiment of the present invention is shown in FIGS. FIG. 1 shows a vibration isolation /
FIG. 3 is a vertical cross-sectional view of the vibration isolator, and FIG. 2 is a view showing the vibration isolator / vibration isolator according to the present invention from the bottom surface (the AA surface in FIG. 1). 1 is a cross-sectional view taken along the line BB of FIG.

In these figures, reference numeral 1 is a table on which an isolated vibration-isolated object, such as a measuring instrument, is installed. Reference numeral 2 is a base fixedly installed on the side of vibration such as an earthquake. The table 1 is kept parallel to the base 2 by the ball support 3 with a certain distance.
Further, the ball support 3 is held so as to be displaceable in the parallel direction by rolling of the ball support 3. Reference numerals 4 and 5 denote support plates having a size (length) required to prevent the vibration of the table 1 from being displaced in the direction parallel to the base 2 and to transmit or absorb the vibration. It is fixed to the table 1 and the base 2. These members 1, 2, 3, 4, 5 are configured to have rigidity. The cylindrical portion 1T projects from the center of the lower surface of the table 1, while the cylindrical portion 1T projects from the upper surface of the base 2.
Four protrusions 2T are projected on a concentric circle in a direction opposite to T.

A feature of the present invention is that a special vibration isolation member 6 is provided between each of the cylindrical portion 1T and the four protrusions 2T. That is, as shown in the figure, the vibration isolator 6 has four metal plate-like members having a bent portion 6M in the middle, and both ends of each are fixedly connected and fixed to the cylindrical portion 1T and the protruding portion 2T. There is. In particular, the bent portion 6M is manufactured to have a portion that causes plastic deformation when the table 1 is displaced in the parallel direction with respect to the base 2 by a certain amount or more.

Therefore, for base 2 table 1
Is displaced within a certain amount in the parallel direction, the metal vibration isolation member 6 is elastically deformed to prevent or absorb the movement of the base 2 (displacement due to an earthquake) to the table 1. And exerts the function of anti-vibration / isolation, and when the table 1 is displaced in the parallel direction with respect to the base 2 by a certain amount or more, plastic deformation is caused to cause permanent strain, and the table 1 regarding the displacement of the base 2 is generated. It is designed to prevent or absorb the transmission to and to exert a vibration isolation function. Of course, when vibration or the like does not occur, since the four vibration isolation members 6 are stretched in the X-axis direction and the Y-axis direction, the table 1 is fixedly supported with respect to the base 2 and placed on the table 1. The measuring instruments placed on it will be held safely and stably.

The above-mentioned structure and the structure shown in FIGS. 1 and 2 have a small number of parts and can sufficiently exhibit the vibration-damping and vibration-isolating function. Although a vibration isolation device is provided, the present invention is not limited to this configuration, but includes many modified embodiments utilizing this feature. For example, although it is a vibration isolation member, it may be a lever-shaped member having no bent portion as shown in FIGS. 3 and 4 specifically show this modification, FIG. 3 shows a DD cross section of FIG. 4, and FIG. 4 shows C of FIG.
The structure seen from the C surface is shown. Moreover, the same reference numerals as those in FIGS. 1 and 2 denote the same parts or mechanisms as those in FIGS. 1 and 2, and detailed description thereof will be omitted. In this embodiment, the vibration isolation member 7 is a slightly curved metal plate member, and the tip portion of the vibration isolation member 7 is a cylindrical portion 1T at the center of the lower surface of the table 1.
It is elastically contacted with and is in line contact because it is a plate. Moreover, the material 7E which is plastically deformed to cause permanent strain is interposed in the middle. The material 7E may be modified by processing the member 7, or a member that is plastically deformable and different from the member 7 may be interposed. In that case, the member 7 is made of an elastic material that is not plastically deformed.

In the modified example of FIG. 3, instead of interposing the material 7E that causes strain in the member 7, a modified example may be considered in which a bent portion is formed as shown in FIG. 1 to cause plastic deformation. Further, these members 6 and 7 may be formed in a pipe shape or a round bar shape instead of a plate shape. In the case of a pipe, the pipe may be flattened. Since these members have a simple shape and are relatively easy to obtain strength, they are useful as vibration isolation members. This vibration-isolating member is either a material that undergoes plastic deformation as a whole and is also elastically deformable, or a material in which a region of elastic deformation is wide and in which a plastically deformable material is interposed locally. Or adopt.
Further, there are various shapes such as a plate shape, a coil winding shape, and a corrugated shape, which can be appropriately selected and used depending on the type of a vibration source such as an earthquake.

Further, the number of the vibration isolation members is not limited to four as in the above-mentioned example, but it is also possible to stretch them in a radial manner with at least two or a large number. 2
The minimum number is 4 to fully demonstrate the vibration isolation function.
It is necessary to have pieces, and it is good to stretch them in the X-axis direction and the Y-axis direction. It should be noted that the number of parts required for four is small, and considering these together, four is a preferable example. Regarding the support mechanism for enabling relative displacement between the base and the table in parallel and holding them, the illustrated example is an example in which a ball-shaped support having a simple shape and economical is adopted, but it has more strength and is suitable for heavy objects. It is also possible to employ roller-type supports. Sliding support can also be adopted as a support mechanism,
Since resistance is generated due to slippage, it is unbeatable as a vibration isolation / vibration isolation device when vibration is relatively small. Further, in addition to the configuration of the above-described embodiment, for example, a stopper or the like that restricts the displacement of the table with respect to the base for a certain amount or more can be attached. It is also possible to install a holding frame so that each member does not disassemble and scatter when carrying the entire device.
In order to facilitate disassembly and adjustment, an interposition of a vibration isolation member between the base and the table may be configured so that it can be detachably set in a cassette type. It is also possible to ground the mounting means on the table so that the vibration-isolated side portions (analytical equipment, test equipment, measuring equipment, etc.) mounted on the upper part of the table can be stably mounted and fixed. The invention embraces all these alternative embodiments. The present invention is summarized as follows from the above.

Appendix 1 The vibration-isolated side portion is installed via a support mechanism so that the vibration-isolated side portion can be moved in parallel to the vibration direction. Anti-vibration characterized by being connected by a vibration-isolating member that causes plastic deformation when the vibration-side part is displaced with respect to the vibration-isolated side part by a certain amount or more.
Vibration isolation device.

Appendix 2 The vibration-isolated side portion is installed via a ball support so that it can be moved in parallel to the vibration direction with respect to the vibration-side portion, and the vibration-side portion and the vibration-isolation-side portion are vibrated by vibration. An anti-vibration / vibration isolating device, characterized in that the vibration-exciting side portion is connected to an anti-vibration side portion by a vibration-isolating member that is plastically deformed when displaced by a certain amount or more.

Appendix 3 The vibration-isolated side portion is installed via a support mechanism so that the vibration-isolated side portion can move in parallel to the vibration direction. An anti-vibration / vibration isolation device, characterized in that it is connected by a plurality of anti-vibration members that undergo plastic deformation when the vibrating side part is displaced with respect to the anti-vibration isolated side part by a certain amount or more.

Appendix 4 The vibration-isolated side portion is installed via a support mechanism so that it can be moved in parallel to the vibration direction with respect to the vibration side portion, and the vibration side portion and the vibration isolation side portion can be moved by vibration. The vibration-excited side portions are connected by four vibration-isolated members that plastically deform when the vibration-isolated side portions are displaced by a certain amount or more, and the four vibration-isolated members are in the X-axis direction and the Y-axis. Anti-vibration / isolation device characterized by being stretched in the direction.

Appendix 5 The vibration-isolated side portion is installed via a support mechanism so that the vibration-isolated side portion can move in parallel to the vibration direction, and the vibration-side portion and the vibration-isolated side portion can be moved by vibration. An anti-vibration / vibration isolation device, characterized in that it is connected by an anti-vibration member having a material that causes plastic deformation when the vibration-excited side portion is displaced with respect to the anti-vibration isolated side portion by a certain amount or more.

Appendix 6 The vibration-isolated side part is installed via a support mechanism so that it can be moved in parallel to the vibration direction with respect to the vibration-side part, and the vibration-side part and the vibration-isolation-side part are moved by vibration. Anti-vibration / isolation, characterized in that it is connected by a vibration-isolation member that has been partially modified so that plastic deformation will occur when the vibration-excited side part is displaced with respect to the vibration-isolated side part by a certain amount or more. apparatus.

Appendix 7 The vibration-isolated side portion is installed via a roller support so that the vibration-isolated side portion can move in parallel to the vibration direction, and the vibration-side portion and the vibration-isolated side portion are oscillated by vibration. An anti-vibration / vibration isolating device, characterized in that the vibration-exciting side portion is connected to an anti-vibration side portion by a vibration-isolating member that is plastically deformed when displaced by a certain amount or more.

[0019]

INDUSTRIAL APPLICABILITY The vibration isolation / vibration isolation device of the present invention has a large vibration isolation effect against large-amplitude vibrations in the low frequency region as compared with the system in which a vibration isolation rubber is interposed. Anti-vibration effect against expected earthquake can be expected. Since it is not a spring intervening method, it can also be used for heavy objects. There is no oil leakage unlike the hydraulic cylinder interposition method. Further, the structure is simplified, the number of parts is small, and there are few malfunctions, mechanism destruction and damage that are likely to occur in a complicated structure, and a safe, reliable, durable and economical vibration isolation / vibration isolation device is provided. .

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing the overall configuration of a vibration isolation / vibration isolation device according to the present invention.

FIG. 2 is a bottom view showing the overall configuration of the vibration isolation / vibration isolation device according to the present invention.

FIG. 3 is a vertical sectional view showing a configuration of a modified example of the vibration isolation / vibration isolation device according to the present invention.

FIG. 4 is a bottom view showing the configuration of a modified example of the vibration isolation / vibration isolation device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Table 1T ... Cylindrical part 2 ... Base 2T ... Projection part 3 ... Ball support body 4, 5 ... Support plate 6, 7 ... Vibration isolation member 6M ... Bending part 7E ... Plastic deformation material

Claims (1)

[Claims] 1. A vibration-isolated side portion is installed via a support mechanism so as to be able to move in parallel to the vibration direction with respect to the vibration side portion. An anti-vibration / vibration isolating device, characterized in that the vibration-exciting side portion is connected to an anti-vibration side portion by a vibration-isolating member that is plastically deformed when displaced by a certain amount or more.