JPH0724475U - Seismic device - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a seismic oscillating device with a simple structure that can sway in three degrees of freedom. [Structure] An elastic body is attached between the platform and a pedestal below the platform to support the platform. A Z-axis actuator is attached between the pedestal and the bottom surface of the platform to give a vertical vibration. An X-axis actuator is attached between a first structure extending upward from the gantry and a predetermined portion of the platform to apply vibration of a component perpendicular to the Z-axis. The second extending upward from the gantry
Y between the structure of the
An axis actuator is attached to give a vibration in a component perpendicular to the Z axis and the X axis. The platform is supported by an elastic body such as a spring, and each actuator is driven in the three directions by the allowable deflection amount of the elastic body, so that a simple three-degree-of-freedom seismic device can be realized.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vibration generator that artificially generates an earthquake sway in order to experience an earthquake sway.

[0002]

[Prior art]

 Conventional seismic devices have rails that support the platform and guide it in the shaking direction.

FIG. 2 shows a conventional three-degree-of-freedom earthquake generator. In FIG. 2, 21 is a platform, 22 is a Y-axis actuator, 23 is a Y-axis rail, 24 is a first mount, 25 is an X-axis actuator, 26 is an X-axis rail, 27 is a second mount, and 28 is The Z-axis actuator 29 is a third mount. Three or more Z-axis actuators 28 are arranged on the horizontal third mount 29. The Z-axis actuator 28 has a second mount 27 mounted on the upper part thereof and swings the entire structure above it in the vertical direction. A pair of parallel X-axis rails 26 is arranged on the second pedestal 27, and the X-axis rails 26 engage with the X-axis engaging portions 261 of the first pedestal 24 arranged on the upper part. An X-axis actuator 25 is installed between the first gantry 24 and the second gantry 27, and the X-axis actuator 25 sways the upper structure including the first gantry 24 in the X direction. An X-axis rail 26 and a set of parallel Y-axis rails 23 orthogonal to the X-axis engaging portion 261 are arranged on the first pedestal 24. The Y-axis rail 23 engages with the Y-axis engaging portion 231 of the platform 21 arranged in the upper part, and the Y-axis actuator 22 arranged between the first frame 24 and the platform 21 swings the platform 21 in the Y direction. To do.

[0004]

[Problems to be solved by the device]

 In the conventional seismic generator, as described with reference to FIG. 2, the rails for guiding in the swaying direction, that is, the Y-axis rail 23, the X-axis rail 26, the Y-axis engaging portion 231, and the X-axis engaging portion 261 are provided. Since the pedestals 24 and 27 and the platform 21 which are required to be mounted and oscillate by these are stacked, the structure becomes large and complicated.

The present invention has been made in order to solve the above problems, and an object thereof is to obtain a seismic oscillating device which can have a simple structure and can sway in the directions of three degrees of freedom.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, a seismic generator according to the present invention vibrates a platform, and is mounted between a pedestal located below the platform and the pedestal and the lower surface of the platform to support the platform. An elastic body, a Z-axis actuator that is mounted between the gantry and the lower surface of the platform to apply a vertical component vibration to the platform, a first structure extending upward from the gantry, and a predetermined structure of the platform. An X-axis actuator that is mounted between the base and a predetermined point on the platform, and an X-axis actuator that applies a vibration component in the direction perpendicular to the Z-axis, and a second structure that extends upward from the mount. And a Y-axis actuator that gives a vibration of a component in a direction perpendicular to the Z-axis and the X-axis.

[0007]

[Action]

 The platform is supported by an elastic body such as a spring, and a simple 3-DOF seismic device can be realized by driving each actuator in the three directions by the allowable deflection amount of the elastic body.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the configuration of one embodiment. In FIG. 1, 1 is a platform, 2 is an X-axis actuator, 3 is a Y-axis actuator, 4 is a Z-axis actuator, 5 is a spring as an elastic body, 6 is a mount, and 61 and 62 are respectively integrated with the mount 6. The first and second structures are constructed and extend upward.

The platform 1 is made of, for example, a flat cube and gives a person riding on the platform an earthquake experience. The platform 1 is supported by a plurality of springs 5 above a pedestal 6 placed in a horizontal state, and is supported in parallel in a stationary state. The spring 5 has its axial length direction vertical and its lower end is vertically attached to the pedestal 6, and its upper end is attached to the lower surface of the platform 1 so that it can be expanded and contracted in the axial direction and deformed in a direction orthogonal to the axis. Has become. A Z-axis actuator 4 is further mounted between the pedestal 6 and the platform 1 to apply a vertical vibration to the platform 1 against the weight of the platform 1 and the tensile or repulsive force of the spring 5. . The X-axis actuator 2 is attached so as to connect a predetermined location on the upper side of the first structure 61 and a predetermined location on one side surface of the platform 1, and gives a vibration in the X-axis direction. The Y-axis actuator 3 is attached so as to connect a predetermined location above the second structure 62 and a predetermined location on one side surface of the platform 1, and gives a vibration in the Y-axis direction.

Here, the X-axis direction means one direction perpendicular to the Z-axis, and the Y-axis direction means a direction perpendicular to the Z-axis and the X-axis. Therefore, when the platform 1 is a cube, the side surfaces of the platform 1 to which the X-axis actuator 2 and the Y-axis actuator 3 are attached are adjacent side surfaces, and the first and second structures 61 and 62 are located in front of their sides, respectively. In addition, the X-axis actuator 2 and the Y-axis actuator 3 are connected to the platform 1 by a rotating shaft so that they can rotate in accordance with the vibration of the Z-axis, and they can move in accordance with the vibration perpendicular to the horizontal plane. As described above, play is provided in the orthogonal vibration direction so that the play can slide on the rotation axis. The platform 1 of the Z-axis actuator 4 and the pedestal 6 are connected to each other by, for example, a universal joint so that the platform 1 can be tilted when it vibrates in a direction orthogonal to the Z-axis.

According to the seismic experience program, each actuator, that is, any one of the X-axis actuator 2, the Y-axis actuator 3, and the Z-axis actuator 4, or a combination thereof is driven at various speeds. Shake platform 1 like an actual earthquake.

[0012]

[Effect of device]

 As described above, according to the present invention, since the elastic body having the characteristic of being able to bend in all directions is used as the support structure member, there is an effect that the device can be made simple and easy.

[Brief description of drawings]

FIG. 1 is a side view showing a seismic generator according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of a conventional seismic generator.

[Explanation of symbols]

 1 Platform 2 X-axis actuator 3 Y-axis actuator 4 Z-axis actuator 5 Spring (elastic body) 6 Stand 61 First structure 62 Second structure

Claims (1)

[Scope of utility model registration request] 1. A seismic oscillating device for oscillating a platform, a pedestal located below the platform, an elastic body mounted between the pedestal and the lower surface of the platform to support the platform, the pedestal and the lower surface of the platform. A Z-axis actuator that is mounted between the first structure and a predetermined position of the platform, the Z-axis actuator being installed between the Z-axis actuator and the Z-axis actuator that applies a vertical component vibration to the platform; It is mounted between an X-axis actuator that gives a directional component of vibration, a second structure extending upward from the gantry, and a predetermined portion of the platform, and is configured to generate a component of a directional component perpendicular to the Z-axis and the X-axis. A seismic generator having a Y-axis actuator for giving.