JPH04315937A - Small vibration table - Google Patents

Abstract

PURPOSE:To downsize and make light the main body of a vibration device for carrying out the durability test and strength test for structure by composing a vertical vibrator of one unit, and providing a fixed base with a side guide function and floating function. CONSTITUTION:This device is composed of an vibrator 2 giving a table, on which a sample body 21 is layed, vertical vibration Z and a movable base 9 to which the vibrator 2 is attached. The movable base 9 floats above a fixed base 20. The vibrator 2 for giving the movable base 9 horizontal vibrating force is attached to the fixed base 20. To the fixed base 20 a floating pocket 22A-D for floating the movable base 9 is attached. With such a constitution, a product and disassembly, and light to reduce costs while facilitating assembly and disassembly, and maintenance, and also reducing the installation space for easy handling.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact vibration table for carrying out durability tests and strength tests of structures.

0002

2. Description of the Related Art Conventionally, a static pressure joint has been used as a vibration device to transmit the force of a vibration exciter to a table. The static pressure joint is disclosed in Japanese Utility Model Application No. 56-86540, and the side guide is disclosed in Japanese Utility Model Application Publication No. 55-170645.

[0003] Also, horizontal vibration was carried out by attaching a horizontal vibration machine to the table.

0004

[Problems to be Solved by the Invention] The above-mentioned prior art does not take into consideration miniaturization of the testing device, and there is a problem in that the entire device becomes large compared to the size of the table. The purpose of the present invention is to have the minimum necessary component configuration,
The objective is to obtain a vibrating table with conventional functions.

[0005]

[Means for Solving the Problems] The above object is achieved by using a single vertical vibrator and providing the base with the functions of a side guide and a flotation device.

[0006]

[Function] What used to be a fixed base fixed to a foundation is now equipped with a pad that has a side guide function, eliminating the need for conventional side guides. In addition, the horizontal vibration exciter, which was conventionally attached to the table, has been attached to a new movable base, making it shorter and more compact.

[0007]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3.

When the table 1 is vibrated in the vertical direction Z,
The pressures in the cylinder chambers 17 and 18 of the horizontal vibrator 14 are made the same by a servo valve 16, and the horizontal vibrator 14 is used as a fixing device for the movable base 9. The vibration is performed by alternately switching the hydraulic pressure to the cylinder chamber 6 and cylinder chamber 7 using the servo valve 5. The overturning moment generated by the specimen 21 is supported by cylindrical hydrostatic bearings 8A and 8B. Further, in order to cancel the weight of the specimen 21, a balance pressure PB is applied to the balance chamber 15. Rotation of the table 1 during vibration is prevented by anti-rotation devices 4A and 4B.

When the table 1 is vibrated in the horizontal direction X,
The vertical vibrator 2 pressurizes the cylinder chamber 7 by the servo valve 5 and is brought into a seated state. Vibration is performed by alternately switching the hydraulic pressure to the cylinder chambers 17 and 18 using the servo valve 16. The reaction force of the vibrator 14 is applied to the fixed base 2
Receive 0. Further, the excitation force of the vibrator 14 is transmitted to the movable base via the static pressure joint 10. The sliding portion between the movable base 9 and the fixed base 20 is floated by an oil film of δ by generating oil pressure in the oil passage 25 in floating pockets 22A to 22D provided in the fixed base 20.

[0010] Similarly, side pockets 23A~
D, it is guided by an oil film of only δ.

[0011] If the above-mentioned X and Z excitations are performed simultaneously, biaxial excitation is achieved.

0012

[Effects of the Invention] According to the present invention, the product can be made smaller and lighter, and the cost can be significantly reduced. Furthermore, disassembly, assembly, and maintenance become easier. Moreover, it does not take up much installation space and is easy to handle.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the present invention.

FIG. 2 is a side cross-sectional view of the invention.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a plan view of the prior art.

FIG. 5 is a side view of the prior art.

[Explanation of symbols]

9... moving base, 20... base, 22... floating pocket,
23...Side pocket.

Claims (1)

[Claims] 1. A small-sized vibration table comprising a table, a vibration exciter, a static pressure joint, a side guide, and a base, wherein the base has the functions of the side guide and the floating device.