JP2005248989A - Vibration control damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control damper, exhibiting enough damping performance in simple structure, coping with both small vibration and large vibration, and hardly varying the damping performance against a temperature change in the surroundings. <P>SOLUTION: This vibration control damper includes: at least one intermediate sliding member 18; two or more outer sliding members 16, 17 superimposed on both sides of the intermediate sliding member 18 to freely slide; and a fastening member 24 for locking the intermediate sliding member 18 and the outer sliding members 16, 18 in a superposition thereof to relatively move through a spring member 25. The respective contact surfaces of the intermediate sliding member 18 and the outer sliding members 16, 17 are provided with inclined surfaces 28, 29 inclined in the sliding directions. The inclined surfaces 28, 29 are provided on one or both of the intermediate sliding member 18 and the outer sliding members 16, 17. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vibration damper for controlling various vibrations such as earthquakes and winds generated in buildings, vibrations caused by traffic vehicles, and vibrations generated from machinery.

Conventionally, various types of vibration control devices have been developed for the purpose of preventing vibrations of vehicles, floors of buildings, machines, etc., and soundproofing of sound equipment.
In buildings, viscoelastic dampers and damping walls using a high-damping rubber composition are used as damping devices for the purpose of reducing swaying against wind and seismic reinforcement (see Patent Document 1). In addition, an oil damper using flow resistance such as oil and a friction damper using frictional force are also used (see Patent Document 2 and Patent Document 3).

For example, as shown in FIG. 5, a resin sliding member 3 used for a bearing or the like is disposed so as to be inserted between two metal structural members 1 and 2, and a plurality of clamping bolts 5 are used to There is a friction damper that is integrally locked via a spring 6. In such a friction damper, the structural members 1 and 2 are loaded on the sliding member 3 in the vertical direction (in a direction perpendicular to the opposing surfaces of both the members 1, 2 and 3) by the disc spring 5 interposed in the tightening bolt 5. In addition, the damper expresses a damping property with respect to the moving amount as indicated by a solid line 7 in FIG. In FIG. 5, reference numerals 1 </ b> A, 2 </ b> A, and 3 </ b> A indicate connecting members used when attaching the friction damper to a building or the like.
JP-A-7-197969 JP-A-6-174002 JP-A-7-35183

  By the way, these dampers have the following problems to be solved due to the mechanism of the damping force expression and structural restrictions. That is,

(1) Viscoelastic damper and damping wall If the damping performance of the high damping rubber composition is low, it is necessary to install a large number of viscoelastic dampers and damping walls, and it may be difficult to secure the installation space.
Generally, in a high damping rubber, the characteristic change due to temperature tends to increase as the damping force is increased, and it may be difficult to obtain stable performance within the operating temperature range.

(2) Oil damper An orifice or a valve is used to adjust the damping force. The damper has a large number of parts and a complicated structure, which increases the manufacturing cost.
Since the fluid is sealed in the cylinder, there is a problem of oil leakage under severe conditions.
In order to seal the fluid, high dimensional accuracy is required between the cylinder and the piston, which increases the cost.

(3) Friction damper A friction damper is an example of a vibration damping device that eliminates the drawbacks of the dampers (1) and (2) and has a simple structure and a small change in damping performance with respect to a temperature change. However, as shown in FIG. 6, the external force is more than a certain value due to the coefficient of friction between the contact surfaces of the structural members 1, 2 and the sliding member 3 and the vertical load by the disc spring 6 interposed in the bolt 5. Otherwise, the damper will not operate. For example, when it is set to generate a large damping force for earthquake resistance, there is a drawback that a damping effect cannot be obtained because the damper does not operate for relatively small vibration such as traffic vibration. Even when considering only seismic applications, the magnitude of seismic motion is very wide, making it difficult to deal with relatively small to large earthquakes with conventional friction dampers.

  The present invention has been made by paying attention to the above points, and can exhibit sufficient damping performance with a simple structure, can cope with small to large vibrations, and changes in damping performance with respect to ambient temperature changes. This is to provide a damper for vibration control.

The present invention solves the above problems by the following configuration.
<Configuration 1>
At least one middle sliding member, two or more outer sliding members that are respectively slidably disposed on both sides of the middle sliding member, the middle sliding member, and the outer sliding member And a tightening member that is movably engaged with each other via a spring material in an overlapped state, and an inclined surface that inclines in a sliding direction on each contact surface of the middle sliding member and the outer sliding member A damper for vibration control characterized by the provision of

The reason why at least one middle sliding member is used is that it includes a case where there are two or more middle sliding members.
The middle sliding member and the outer sliding member are relatively movable in the sliding direction, but are also movable in the vertical direction (direction perpendicular to the sliding direction). That is, either the middle sliding member or the outer sliding member may be fixed, and only the other may move. In addition, the amount of expansion and contraction of the spring material can be adapted to the maximum amount of movement of the middle sliding member and the outer sliding member.
Configuration 1 is a movement-dependent damper in which the vertical load (spring force) increases depending on the relative movement of the middle sliding member and the outer sliding member, and the damping force due to the frictional force increases. When Configuration 1 is applied to a vibration control part of a building, the damper operates in a micro-deformation region with a small damping force for small vibration inputs such as traffic vibrations and small earthquakes. Even when a large vibration is input, the damping force increases depending on the movement. Therefore, it is possible to obtain an appropriate damping force by operating the damper according to the external force.

<Configuration 2>
The damping damper according to Configuration 1, wherein the inclined surface is provided on both the middle sliding member and the outer sliding member.

<Configuration 3>
The vibration damper according to Configuration 1, wherein the inclined surface is a curved surface.

<Configuration 4>
In the vibration damper according to any one of the first to third aspects, a tightening bolt that intersects perpendicularly to the sliding surfaces of the middle sliding member and the outer sliding member is used as the tightening member. A damper for vibration damping, wherein the spring material is interposed between an end of a bolt and the outer sliding member.

  A coil spring or a disc spring is used as the spring material. Further, the amount of expansion and contraction of the spring material is adapted to correspond to the maximum amount of movement of the middle sliding member and the outer sliding member.

<Configuration 5>
The vibration damper according to Configuration 4, wherein the bolt insertion hole provided in the inner sliding member for inserting the tightening bolt is a long hole extending in the sliding direction. damper.

  The long hole allows a relative movement of the middle sliding member and the outer sliding member, and also serves as a guide for preventing the middle sliding member and the outer sliding member from being displaced during the relative movement.

<Configuration 6>
The vibration damper according to any one of Structures 1 to 5, wherein the outer sliding member is disposed on both sides of the middle sliding member as one unit, and a plurality of the units are stacked. The damping damper is characterized in that it is locked by the tightening member via a spring material so as to be relatively movable.

<Configuration 7>
In the vibration damping damper according to any one of Configurations 1 to 6, the middle sliding member is formed of a synthetic resin, and the outer sliding member is formed of a rigid material harder than the middle sliding member. A characteristic damper for vibration control.

  For example, polyacetal, fluorine resin or the like can be used as the intermediate sliding member. As the outer sliding member, for example, a metal plate such as a steel material can be used.

    Hereinafter, embodiments of the present invention will be described using specific examples.

1 and 2 are views showing the structure of the vibration damper 15 of the first embodiment.
As shown in these drawings, the vibration damper 15 includes one middle sliding member 18 and outer sliding members 16 that are slidably disposed on both sides of the middle sliding member 18. 17 and a tightening bolt 24 that locks the intermediate sliding member 18 and the outer sliding members 16 and 17 through a coil spring 25 so as to be relatively movable with each other.

  The contact surfaces of the middle sliding member 18 and the outer sliding members 16, 17 are provided with inclined surfaces 28, 29 that coincide with each other and are inclined in the direction of the arrow 30, that is, in the sliding direction. The inclined surfaces 28 and 29 in the middle sliding member 18 are formed so as to be thickest toward both ends in the sliding direction, with the center portion being the most concave. The inclined surfaces 28 and 29 in the outer sliding members 16 and 17 are formed so as to match the recesses.

  The middle sliding member 18 may be formed of a synthetic resin such as polyacetal or fluororesin, and the outer sliding members 16 and 17 may be formed of a rigid material harder than the middle sliding member 18, such as a metal such as steel. Although it is preferable in view of long-term shape stability and damping characteristics, the present invention is not limited to this. The middle sliding member 18 and the outer sliding members 16 and 17 may be made of the same material, that is, both made of synthetic resin or metal, depending on the purpose of installation.

  FIG. 3 shows an example in which damping dampers are attached between the upper and lower beams of the building. As shown in FIG. 3, reinforcing bars 14 are diagonally provided between building columns 12 and 13 and upper and lower beams 10 and 11. The damping damper 15 is attached between, for example, two end portions 14A and 14B separated at the intermediate portion A of the reinforcing rod 14, but the middle sliding member 18 and the outer sliding members 16 and 17 slide. Thus, it is appropriately attached according to the structure of the building so that a damping force is generated.

  When vibration or the like is applied to a building or the like in which the damping damper 15 is attached as shown in FIG. 3 and the two end portions 14A and 14B of the reinforcing rod 14 are expanded and contracted, the outer sliding members 16 and 17 and It moves relative to the inner sliding member 18 in the sliding direction. At this time, since both the sliding members have the inclined surfaces 28 and 29, the vertical load increases in proportion to the amount of movement by the spring force of the coil spring 25, and the frictional force increases. Such an operation is performed in a reciprocating manner, and as shown by a solid line 27 in FIG. 4, the increasing frictional force increases in proportion to the amount of movement, and this acts as a damping force. A region 31 indicated by hatching in FIG. 4 is a minute deformation region having a small damping force with respect to an input of a small vibration such as a traffic vibration or a small earthquake, but also has a damping action in this region.

  In the above embodiment, the inclined surfaces 28 and 29 are provided on both the middle sliding member 18 and the outer sliding members 16 and 17, but may be provided on only one of the two members. Further, the inclined surfaces 28 and 29 may be curved surfaces depending on the damper installation situation.

The vibration damper according to the present invention may have a configuration in which a plurality of middle sliding members exist.
For example, as shown in FIG. 1, one unit is formed by arranging outer sliding members on both sides of one middle sliding member. Then, in a state where a plurality of the units are overlapped with each other, they are locked by a fastening member such as a fastening bolt via a spring material such as a coil spring so as to be relatively movable in a sliding direction and a direction perpendicular thereto. It is.

FIG. 3 is a front view illustrating a structure of a vibration damper according to the first embodiment. FIG. Explanatory drawing which shows the installation condition of the damper for vibration suppression. FIG. 3 is a diagram illustrating a damping characteristic of the vibration damper according to the first embodiment. The front view which shows the structure of the conventional damper for vibration suppression. The diagram showing the damping characteristic of the conventional damping damper.

Explanation of symbols

15 Damping dampers 16 and 17 Outer sliding member 18 Middle sliding member 24 Tightening bolt 25 Coil spring 28 and 29 Inclined surface

Claims (7)

At least one medium sliding member;
Two or more outer sliding members that are respectively slidably disposed on both sides of the middle sliding member; and
A clamping member that locks the middle sliding member and the outer sliding member in a state of being overlapped with each other via a spring material;
A damper for vibration damping, wherein each contact surface of the middle sliding member and the outer sliding member is provided with an inclined surface inclined in a sliding direction. The vibration damper according to claim 1,
The damping damper according to claim 1, wherein the inclined surface is provided on both the middle sliding member and the outer sliding member. The vibration damper according to claim 1,
The vibration damper is characterized in that the inclined surface is a curved surface. The vibration damper according to any one of claims 1 to 3,
As the tightening member, a tightening bolt that intersects perpendicularly to the sliding surfaces of the middle sliding member and the outer sliding member is used, and the spring is provided between the end of the tightening bolt and the outer sliding member. A damper for vibration control characterized by interposing a material. The vibration damper according to claim 4, wherein
A damper for vibration damping, wherein a bolt insertion hole provided in the inner sliding member for inserting the tightening bolt is a long hole extending in a sliding direction. The vibration damper according to any one of claims 1 to 5,
The outer sliding member is arranged on both sides of the middle sliding member as a unit, and a plurality of the units are stacked so that the clamping member can be moved relative to each other via a spring material. A damper for vibration control characterized by being locked. The vibration damper according to any one of claims 1 to 6,
The damping damper according to claim 1, wherein the middle sliding member is made of a synthetic resin, and the outer sliding member is made of a rigid material harder than the middle sliding member.

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