JPH0523441A - Biaxial vibration table device - Google Patents

Abstract

PURPOSE:To provide an inexpensive biaxial vibration table device with simple structure, and also, vibration and a noise are scarcely propagated to a base ground and an adjacent block. CONSTITUTION:The biaxial vibration table device consists of a horizontal vibration table 1 for placing an object on the upper face, a vibration generating machine 2 which is installed on the center lower face of the vibration table 1 and excites vertically the vibration table 1, an actuator 6 for exciting the vibration table 1 in the horizontal direction, and a roller 3 having elasticity for supporting the vibration table 1 so that it can move in the direction of the actuator 6, and also, can be displaced elastically in the vertical direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaking device used for leisure facilities, training, etc.

[0002]

2. Description of the Related Art Conventionally, a rocking mechanism using hydraulic pressure has been generally used to rock a seat. Here, a two-axis (upper and lower, left and right) vibration device using hydraulic pressure will be described as an example. FIG. 4 shows a perspective view of the hydraulic biaxial vibration device, and FIG. 5 shows a system configuration diagram.

4 and 5, a vibration table, b is a joint, c is a vertical movement hydraulic cylinder, d is a guide shaft, e is a sleeve, f is a slider, g is a rail, and h is a horizontal movement hydraulic cylinder. .. The hydraulic cylinder c generates vertical vibrations, and the guide shaft d and the sleeve e serve as vertical guide members. Further, the hydraulic cylinder h generates horizontal vibration, and the slider f and the rail g serve as horizontal guide members.

[0004]

The above-mentioned prior art has the following problems. (1) Regarding the transmission of load during vibration of the vibrating table, when vibrating the vibrating table, the load (F) generated by the acceleration of vibration is the mass of the swaying portion (m) and the acceleration (G).
Then, F = m · G. Since the load of the vibrating table is supported by the vertical movement hydraulic cylinder c, the vibration is also received by the vertical movement hydraulic cylinder c, and the load is directly transmitted to the foundation ground which is a lower mounting portion of the hydraulic cylinder. Since the working fluid in the hydraulic cylinder is incompressible oil (liquid), this load is transmitted to the foundation with almost no buffer. Therefore, the static load "m" (self-weight of the vibration table + the load of the object mounted on the table) and the dynamic load "F" due to the vibration acceleration are transmitted to the foundation of the vertical movement hydraulic cylinder and the same lower mounting part. Therefore, it is necessary to consider both loads in the design of these (hydraulic cylinder body and foundation). That is, as the vibration table a moves faster to generate high acceleration, the vibration load increases, and the design load of the cylinder increases, so that it is necessary to increase the diameter and strengthen the ground bearing capacity of the foundation. Therefore, the cost will increase. Further, in the case where a rough device is installed in a part of the floor in the building, special measures are required to avoid vibration and noise transmitted from the hydraulic cylinder lower mounting part foundation to the adjacent section.

Even if the above countermeasure is very difficult or technically possible, the cost increases greatly. (2) With respect to the space for arranging the vibration generating mechanism components under the vibrating table, a hydraulic cylinder c for vertical movement for giving vertical vibration to the vibrating table and a slider f for permitting horizontal movement are provided below the vibrating table a. , A rail g and a guide device (guide shaft d, sleeve e) for smoothly moving in the vertical direction are arranged, a space for arranging them is required, and a space for performing maintenance of these is also necessary. Therefore, a height of at least 1,000 mm or more is required between the installation foundation and the lower surface of the vibrating table.

This size becomes larger as the vertical swing range of the vibrating table a is designed to be larger and the table is wider. Therefore, when planning the installation of the vibration table a, it is necessary to consider and secure the space as the installation space. For the above reasons, installation in the existing building requires a major modification of the installation foundation and installation space, which is a very difficult construction. (3) With regard to assembly and installation accuracy, a mechanism combining rails g and sliders f is adopted as a mechanism that allows lateral movement of the vibrating table a. However, smooth movement and local excessive stress In order to prevent this from occurring, it is necessary to install the rails g ₁ and g _{2 on} the foundation so that the parallelism is accurate.

Further, as a guide for smoothly moving the vibrating table a vertically, a guide device combining a guide shaft d and a sleeve e is provided at a plurality of places under the table. In order to smooth the movement and prevent excessive stress from being locally generated, it is necessary to secure the following mounting dimensional accuracy. (A) The guide shaft d is vertically attached to the vibrating table a. (A) The sleeve e is vertically attached to the slider f. (C) The axis of the guide shaft d and the axis of the sleeve e are aligned. (4) It is necessary to secure the mounting dimensional accuracy as described in (3) above, and it takes a lot of time and labor for the on-site installation work.

It is an object of the present invention to provide a biaxial shaking table device which has a simple structure and is inexpensive, and has less propagation of vibration and noise to the foundation ground and adjacent sections.

[0009]

[Means for Solving the Problems] (1) A vibration generator that independently oscillates is attached directly below the vibrating table to apply vertical vibration to the vibrating table. (2) A plurality of elastic support members are attached under the vibrating table so that they can roll or slide in one direction. (3) An actuator for applying horizontal vibration to the vibrating table is attached to a part of the table via a mounting hardware and a joint. (4) In order to restrain the rolling or sliding direction of the elastic support material (horizontal movement of the vibrating table), a groove-shaped guide plate is provided below the support material.

[0010]

Since the vibrating table is supported by the elastic supporting member such as an elastic roller, when the vibration generator vibrates the vibrating table in the vertical direction, vertical vibration is generated in the vibrating table.
When the actuator vibrates the vibrating table in the horizontal direction, the roller, which is a support member, rolls, and horizontal vibration occurs in the vibrating table.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. In the figure, 1 is a vibrating table, 2 is a vibration generator, 3 is a roller having elasticity, 4 is a mounted object, 5 is a person, 6 is an actuator for lateral vibration, 7 is an installation foundation ground, and 8 is a groove type guide plate. is there. The vibrating table 1 has a space for placing an object on the upper side, and a vibration generator 2 that generates vibration by itself is attached to a portion directly below the center of the vibrating table 1 in order to apply vertical vibration to the vibrating table 1. A plurality of elastic rollers 3 are arranged below the vibrating table 1 to support the foundation ground 7.

The roller 3 having elasticity is mounted so as to be able to roll in a direction perpendicular to the mounting shaft of the vibrating table 1 by means of a bearing having a small rolling resistance. An actuator 6 is attached to the lower side surface of the vibrating table 1 via a mounting metal object in order to give the vibrating table 1 horizontal movement. Below the roller 3, in order to prevent the direction of movement of the vibrating table 1 from changing when the horizontal vibration is repeatedly applied to the vibrating table 1 by the actuator 6, a groove-shaped guide is provided in the rolling direction of the roller 3. A plate 8 is provided.

Such a vibrating table device has the following effects. (1) By mounting a vibration generator that generates vibration by itself just below the center of the vibrating table, the weight of the vibrating part is reduced, and the distance between the vibrating body and the vibration source is reduced.
Vibration transmission efficiency increases. Therefore, it is possible to apply high acceleration to the vibrating table and the mounted object on the vibrating table with a small power. In addition, a single vibration generator can be used as a substitute for all components such as a hydraulic cylinder, a servo valve, and piping, which are components in a conventional hydraulic vibration mechanism. (2) By supporting the vibrating table with a plurality of elastic supports, the vibration load generated when the vibrating table vibrates and is absorbed by the deflection of the elastic support, the load transmitted to the foundation is greatly increased. It can be reduced to (1/5 to 1/10). (3) Rails, sliders, and guide devices (guide shafts, sleeves), which were required in the past, because a plurality of elastic support members mounted under the vibrating table roll or slide to allow left and right movement of the vibrating table. Since the structure is simple without any parts such as etc., the mounting height dimension (height from the foundation ground to the top surface of the vibration table) should be such that the vibration generator and the elastic support material can be mounted in the space. It is smaller than the device. (4) By eliminating the need for rails, sliders, guide devices, etc., the installation dimension accuracy can be extremely eased, and the installation man-hours and installation work period can be reduced. (5) According to the above (2) and (3), it is possible to install the existing building in the existing building with relatively few modifications.

[0014]

The biaxial vibrating table apparatus according to the present invention includes a horizontal vibrating table on which an object is placed, and a vibration generator which is mounted on the lower surface of the center of the vibrating table to vertically vibrate the vibrating table. The following effects are obtained by including an actuator that vibrates the vibrating table in the horizontal direction and an elastic roller that supports the vibrating table so as to be movable in the direction of the actuator and elastically displaceable in the vertical direction. .. (1) As a vibration source that gives vertical vibration to the vibrating table, a vibration generator that generates vibration by itself is used, and it is installed directly under the vibrating table. (A) The structure is simple and maintenance is easy. , The installation space (height) is small. (B) Vibration transmission efficiency is high, and effective vibration can be generated with small power. (C) The vibration acceleration can be easily changed only by changing the capacity of the vibration generator. (2) By using a roller-shaped elastic support material as the support material of the vibrating table, the transmission of the vibration load to the installation foundation due to the vibration of the vibrating table is greatly reduced (1/5 to 1/10). .. Therefore, the strength design conditions of the foundation can be greatly relaxed. (3) Manufacturing cost is reduced. (4) It becomes possible to manufacture a vibrating table having a relatively large area. (5) Even a floor in an existing building can be installed with little modification. (6) The installation work period can be shortened.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a view taken along the line BB of FIG.

FIG. 4 is a perspective view of a conventional hydraulic vibration table device.

FIG. 5 is a system configuration diagram of a conventional hydraulic vibration table device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaking table 2 Vibration generator 3 Elastic roller 6 Left and right vibration actuator

Claims (1)

Claim: What is claimed is: 1. A horizontal vibrating table on which an object is placed,
A vibration generator mounted on the lower surface of the center of the vibrating table for vertically vibrating the vibrating table, an actuator for horizontally vibrating the vibrating table, and a vertically movable unit for moving the vibrating table in the direction of the actuator. A two-axis vibrating table device, which comprises a roller having elasticity for elastically movably supporting the table.