JP3023624B2 - Floating foundation strong vibration damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a floating base type vibration damping device, particularly a vibration test device for performing a tensile test on a steel material or the like and various punching presses. The present invention relates to a floating foundation type strong vibration damper that is optimal for the basic structure of equipment.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, for example, a foundation structure such as a tensile tester or a press is generally constructed by digging a ground 1 and pouring fresh concrete into a concrete device having a predetermined thickness and size. A foundation 2 was constructed, and a device 3 with vibration generation such as a test machine was directly installed on the foundation 2.

For example, when a tensile test is performed on a steel material or the like, a strong longitudinal vibration is generated when the steel material breaks. However, as described above, the conventional basic structure is integrated with the test machine, and Vibration is directly transmitted to the vehicle, which causes vibration pollution. In addition, since the basic structure of a device such as a press machine has the same structure as described above, a problem similar to that of the test machine occurs at the time of punching or the like.

In order to reduce the vibration pollution, a method of interposing a disc spring or a rubber plate between the device 3 and the device base 2 has conventionally been adopted. Is capable of damping the vibration to a certain extent, so there is little concern about causing vibration pollution in the surrounding area.However, in the case of large equipment, the generated vibration is large, so the above-mentioned disc springs etc. have a damping effect. I couldn't expect enough.
For this reason, for example, in the case of performing a tensile test, for example, conventionally, in order to eliminate vibration pollution, the operation of the device is stopped immediately before a steel material or the like is broken without fail, and the test is currently performed.

However, in the tensile test, the original purpose of the test can be achieved by pulling until the steel material is completely broken. If the test is stopped halfway, accurate test results cannot be obtained. Occurs. Therefore, there is a need in the art for the development of a shock absorber that can cope with equipment that generates strong vibration.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and sufficiently absorbs and dampens even strong vibrations, thereby reliably solving the problem of vibration pollution. It is an object of the present invention to provide a floating-type strong vibration damper that can be used.

[0007]

To achieve the above object, according to an aspect of, floating foundation type strong vibration damping device according to the present invention, the vibration generator
Between the floating base plate and the equipment foundation where the equipment with
The shock absorber is provided with a dash
And the dashpot is comprised of
A sealed outer cylinder erected on the container base and this syringe
A cylindrical space is formed between the inner wall of the
The inner cylinder housed in the cylinder and the inner cylinder
The piston which is slidably accommodated in the vertical direction
A piston rod fixed to the upper end of the center of the ton.
Near the lower end of the side cylinder,
And a small hole for circulation of the damping medium
In addition, the piston has an inner cylinder
Damping medium that connects the upper and lower chambers formed in the cylinder
Small holes for circulation are drilled, inside the inner and outer cylinders
Oil or air damping medium is enclosed in the outer cylinder
The upper end of the piston rod is
Projecting upward from the upper end of the side cylinder,
Is supported by the projecting upper end of the rod, and the spring is
It is characterized by being provided interposed between the equipment base and the floating base plate .

[0008]

[Function] When vibration is generated from equipment on the floating base,
Vibration is transmitted to the piston and spring,
Most are received and absorbed by the piston, and the inner cylinder
Oil (or air) in the lower chamber of the room through the small holes
And kinetic energy due to the impact is converted to heat energy.
To attenuate vibrations. Therefore, from the device
The generated vibrations are reliably absorbed, and even if the vibrations are strong
Transmission to the ground is completely insulated and bodily sensation is almost zero
And the noise generated by the equipment is halved. Ma
In addition, since the dashpot with the above configuration is adopted,
Rolling of the base, and thus the equipment, is prevented. Further
In addition, between the equipment foundation and the equipment, interposition of shock absorbers and floating foundations
Therefore, the transmission of vibration between each other is interrupted.
Vibration from outside is also cut off. That
As a result, external vibrations such as precision equipment
The problem of blurring is also eliminated .

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional side view of a floating-based strong vibration damping device according to this embodiment, FIG. 2 is an enlarged longitudinal sectional view showing a spring portion of a shock absorber of the same device, and FIG. 3 is a dashpot portion of the same device. It is a longitudinal cross-sectional view which expands and shows.

In FIGS. 1 and 3, the equipment basics 11
Is formed of a concrete layer 13 having a predetermined thickness and size by digging a predetermined portion of the ground 12 and assembling a frame material (not shown), pouring fresh concrete. This equipment basics 1
1 is almost the same as the conventional one.

A floating base 15 on which a tensile tester, a press, and other devices 14 that generate vibrations are installed is made of a steel plate or the like.
1. The device 14 is mounted and fixed on a floating base 15, and the base 15 is formed to have appropriate strength and size corresponding to the device 14. The floating base plate 15 of this embodiment is formed in a square dish shape by a steel plate material, and each corner of the dish-shaped body 17 is supported by a shock absorber 16 and is floated on the equipment base 11.

A shock absorber 16 for supporting the floating base table 15 includes a dash pot 18 and a spring 19. As shown in detail in FIG. 3, the dashpot 18 of this embodiment includes a closed outer cylinder 22 erected on the equipment foundation 11.
And an inner cylinder 22A which is formed upright and accommodated in the cylinder 22 by forming a cylindrical space portion 21 between the inner cylinder 22A and the inner wall surface of the cylinder 22, and slides vertically in the inner cylinder 22A. A piston 23 which is freely accommodated, and a piston rod 26 which is fixed to an upper end of the center of the piston 23
Near the lower end of the inner cylinder 22A, the upper and lower chambers 2 formed in the cylinder 22A with the piston 23 as a boundary.
0 and 20A, the lower chamber 20 and the space 21
And a small hole 24 for communicating a decay medium for communicating the two upper and lower chambers 20 and 20A in the inner cylinder 22A with the piston 23. A damping medium 27 made of oil or air is enclosed and accommodated in the inner and outer cylinders 22 and 22A by the outer cylinder 22. The upper end of the piston rod 26 is positioned from the upper end of the outer cylinder 22. It is configured to protrude upward and to support a predetermined portion of the floating base board 15 with the protruding portion of the rod 26. With this configuration, when vibration due to an impact or the like is generated from the device 14 on the floating base board 15, the vibration is transmitted to the piston 23 through the piston rod 26, and the impact due to the vibration is received and absorbed by the piston, and the inner cylinder 22A is absorbed. The damping medium 27 made of oil (or air) in the lower chamber 20 is made to flow through the small holes 24 and 25, and the kinetic energy due to the impact or the like is changed to heat energy to attenuate the vibration. ing. This implementation
Like the dashpot in the example, it applies hydraulic and pneumatic principles.
What we used was shock absorbers for cars and railway cars
Has been adopted as a bar. However, hydraulic
Vibration damping device applying the principle of air pressure and air pressure is still developed
Not.

The dash pot 18 is mounted on the floating base 15
In this embodiment, the platen 15 is floated on the base 11 to support it.
A mounting arm rod 29 is fixedly provided at an upper portion of each corner of a flange 28 protruding from the periphery of the cylinder, and a mounting plate 30 is fixedly provided at the bottom of the cylinder 22. 32 and the piston 23
The upper end of the rod 26 is fixed to the lower end of the arm rod 29 with a bolt 33 or the like to support the base 15. This allows
Vibrations and the like received by the floating foundation board 15 are reliably absorbed by the dash pot 18, so that conduction to the ground 12 is completely insulated .

A spring 19 as another component of the shock absorber 16 buffers the vibration and the like by the dashpot 18 and then returns the dashpot to its original state, and functions to prepare for the next shock and the like. The spring 19 of this embodiment employs a coil spring made of steel, and this spring 19 is adjacent to the dash pot 18, and the flange 28 and the base plate 32
And is provided between them. In FIG. 2, reference numeral 34 denotes a support base fixedly provided on a base plate 32 with bolts 35;
Reference numeral 37 denotes a spring rest formed opposite to the upper surface of the support base 34 and the lower surface of the flange 28. As a result, the dashpot 18 returns to its original position. The spring 19 may be a leaf spring or the like instead of the coil spring.

The floating foundation type strong vibration damper of this embodiment is constructed as described above, and a tensile tester and other devices 14 which generate vibrations are mounted on the floating foundation board 15 and fixed and installed. Is what you do.

FIG. 4 is a longitudinal sectional view showing a main part of another embodiment of the present invention. In the present embodiment, a dashpot 18 and a spring 19 constituting the shock absorber 16 are integrally combined. That is, the spring 19 is connected to the floating base 15
A mounting plate is provided between the flange 28 and the base plate 32 on the equipment base 11, and the cylinder 22 of the dashpot 18 is accommodated in the center of the spring 19 and fixed to the bottom of the cylinder 22. 30A is fixed to the base plate 32 with bolts 31A. The mounting member 4 is provided on the upper surface of the flange 28.
1 and the upper end of the rod 26 of the piston of the dash pot 18 is formed in the flange 28 in the insertion hole 42.
And the upper end of the rod 26 is fixed to the mounting member 41 with a bolt nut 43, and the floating base 1
5 is configured to be floated and supported on the device foundation 12. When configured as in this embodiment, the shock absorber 1
6 can be made compact. Since the other configurations such as the same as the above embodiment will be omitted of the detailed description are denoted by the same reference numerals.

[0017]

As described above, the present invention is constructed as described above, so that it can reliably absorb vibrations and shocks generated from the equipment and completely shuts out conduction to the ground even with strong vibrations. can do. Therefore, according to the present invention, it is possible to reliably solve the problem of vibration pollution caused by the equipment.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing one embodiment of a floating-based strong vibration damping device according to the present invention.

FIG. 2 is an enlarged longitudinal sectional view showing a spring portion of a shock absorber of the same device.

FIG. 3 is an enlarged longitudinal sectional view showing a portion of a dashpot of a shock absorber of the same device.

FIG. 4 is a longitudinal sectional view showing a main part of another embodiment of the device of the present invention.

FIG. 5 is a longitudinal sectional side view showing a basic structure of a conventional tensile tester or the like.

[Explanation of symbols]

 11 Equipment Foundation 12 Ground 14 Equipment with Vibration 15 Floating Foundation 16 Shock Absorber 18 Dash Pot 19 Spring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16F 15/00-15/32 B30B 15/00 G01D 11/30

Claims (1)

(57) [Claims] 1. A floating base on which equipment with vibration is installed.
A shock absorber is interposed between the panel and the equipment foundation.
The shock absorber is composed of a dashpot and a spring.
The dash pot is outside the seal standing on the above equipment foundation
A cylindrical hollow space between the cylinder and the inner wall of this cylinder
Inner cylinder that forms a space and is housed in the cylinder
And slidably housed vertically in this inner cylinder.
Piston and a piston fixed at the top center of the piston
With a ton rod and near the lower end of the inner cylinder
For circulation of the damping medium that connects the cylinder and the space
A small hole is drilled and the piston
The upper and lower two formed in the inner cylinder
A small hole for the flow of the damping medium for communicating the chamber is formed,
Oil or air damping medium in the inner and outer cylinders
The body is enclosed and housed in an outer cylinder and the piston
The upper end of the rod projects upward from the upper end of the outer cylinder.
And the floating base plate is supported at the protruding upper end of the rod.
And the spring is interposed between the equipment foundation and the floating foundation board.
A floating-based strong vibration damping device, characterized in that the device is provided as a floating base.