JPH07158693A - Spring device for vibration control device - Google Patents

Abstract

PURPOSE:To enable operation with low friction without the generation of buckling even if displacement is large by providing a spline shaft and a spline nut at the center part of a coil spring, and providing linear bearing blocks and linear rails around the coil spring. CONSTITUTION:A coil spring 5 provided with initial flexure is provided between two spring bearing plates 4 supported with a fixed space by pressure bars 8, and a spline shaft 6 is provided at the center part. One end of the spline shaft 6 is fixed to a guide plate 1 disposed at the center part in the longitudinal direction of the coil spring 5, and the other end pierces a spline nut 7 provided at the center part of the spring bearing plate 4. Since plural linear bearing blocks 2 and linear rails 3 for guiding them are disposed around the guide plate 1, the guide plate 1 moves parallelly in the longitudinal direction of the coil spring 5, so that buckling is not generated. Even in the case of a spring device being installed horizontally by the spline shaft 6 and spline nut 7 at the center part, the self-weight supporting part of the spring device is put in rolling motion so as to enable operation with low friction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring device for a vibration damping device used in a horizontal direction, for example, a spring device used for a vibration damping device for reducing the vibration of a chimney, a tower, a bridge, a building or the like.

[0002]

2. Description of the Related Art Conventionally, various vibration damping devices have been proposed and used for reducing vibrations of buildings, bridges, etc. during strong winds and earthquakes. Some spring devices used in the vibration damping device use a coil spring, and the specific structure thereof is one in which spring receiving plates 10 are provided at both ends of the coil spring 5 as shown in FIG. 5, or as shown in FIG. Although both ends of the winding spring 5 are attached to the spring embedding metal fitting 9, the winding spring causes a buckling phenomenon when the displacement in the compression direction becomes large, and it cannot be used in a vibration damping device in which the displacement becomes large. Is. Further, JP-A-5-19429 has a large friction and cannot be used in the horizontal direction. Further, in the example shown in FIG. 5, there is a problem that it cannot be installed horizontally. The example shown in FIG. 6 is a problem because the spring constant changes when the coil spring is compressed and when it is tensioned.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a spring device for a vibration damping device which uses a coil spring and which operates with low friction without buckling even when the displacement is large and which can be mounted horizontally. Is what you are trying to do.

[0004]

The structure of the present invention for solving the above-mentioned problems is as set forth in the claims, which will be specifically described with reference to FIG. This is a spring device for a vibration damping device, which has a spline shaft 6 and a spline nut 7 that perform linear motion in the central portion, and a linear bearing block 2 and a linear rail 3 as guides for the coil spring 5 around the coil spring. Referring to FIG. 1, the structure thereof will be described in more detail. There is a winding spring 5 having an initial deflection between two spring bearing plates 4 supported by a presser bar 8 at a constant interval, and a spline is provided at the center thereof. There is an axis 6. One end of the spline shaft 6 is fixed to the guide plate 1 arranged at the center of the winding spring 5 in the longitudinal direction, and the other end of the spline shaft 6 penetrates a sprite nut 7 provided at the center of the spring receiving plate. There is. Since a plurality of linear bearing blocks 2 and a linear rail 3 for guiding the linear bearing blocks 2 are arranged around the guide plate 1, the guide plate 1 translates in the longitudinal direction of the coil spring. Therefore, even if the displacement of the guide plate 1 becomes large, buckling does not occur, and even if the spring device is installed horizontally by the spline shaft 6 and the spline nut in the central portion, the movement of the support portion of the spring device due to its own weight is prevented. Because of the rolling motion, it can operate with low friction.

The advantage of the device shown in FIG. 1 is that the coil spring is given an initial deflection, so that the linearity of the spring constant is linear and it is quiet during operation. FIG. 2 shows another embodiment of the present invention. In the device of FIG. 2, the guide plate 1
And 1-2 are on both ends of the coil spring 5, and the spline nut 7 is attached to each guide plate thereof.
The presser bar 8 also serves as the linear rail 3 of the linear bearing block 2. At both ends of this presser bar 8, there are respective receiving plates 4.

FIG. 2 shows a state where no external force acts on the spring device, and FIG. 3 shows a state where a tensile force acts on the spring device. That is, the spline shaft 6
When is moved by a pulling force, the guide plate 1-2 fixed to one end thereof moves in a direction of compressing the coil spring 5. FIG. 4 shows a state in which a compressive force acts on the spring device. That is, when the spline shaft 6 moves in the direction opposite to the case of FIG. 3 due to the compressive force, the guide plate 1 moves in the direction of compressing the coil spring 5. In the apparatus shown in FIGS. 2 to 4, the movement of the guide plate always acts in the direction of compressing the coil spring 5. The advantage of this device is that it is small as a spring device and a large load can be obtained.

[0007]

As described above, according to the spring device of the present invention, the winding spring does not buckle even when displaced, and the friction between the respective members at the time of displacement is small, so that the spring device can be displaced smoothly. it can. Therefore, the spring device of the present invention can be installed horizontally on the vibration damping device and is extremely reliable.

[Brief description of drawings]

FIG. 1 is an explanatory view of a specific example of a spring device of the present invention,

FIG. 2 is an explanatory view of a specific example of a spring device of the present invention,

FIG. 3 is an explanatory view of a specific example of a spring device of the present invention,

FIG. 4 is an explanatory view of a specific example of a spring device of the present invention,

FIG. 5 is an explanatory view of a specific example of a conventional spring device,

FIG. 6 is an explanatory view of a specific example of a conventional spring device.

[Explanation of symbols]

 1 Guide plate 2 Linear bearing block 3 Straight rail 4 Spring receiving plate 5 Winding spring 6 Spline shaft 7 Spline nut 8 Presser bar 9 Spring receiving plate 10 Spring embedding metal fitting

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location F16F 1/12 Q 8917-3J

Claims (2)

[Claims] 1. A vibration damping device for use in a horizontal direction has a spline shaft and a spline nut that perform linear motion in the center of a coil spring, and has a linear spring around the guide plate as a guide for the coil spring. A spring device for a vibration damping device, comprising a bearing block and a straight rail, and having the guide plate at a central portion in the longitudinal direction of the coil spring. 2. A vibration control device used in a horizontal direction,
At the center of the coil spring, there is a linear spline shaft and a spline nut, and at the outer periphery of the coil spring, there is a linear bearing block and a linear rail around the guide plate as a coil spring guide. A spring device for a vibration damping device, which is provided at both ends of a spring.