JP2005147161A - Laminated support - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated support capable of easily setting absorbable energy without being dependent on axial force. <P>SOLUTION: A magnet core 30 is inserted into a hollow section 28, and the inserted magnet core 30 is firmly stuck to a laminated elastic body 16 forming the hollow section 28. The magnet core 30 is formed by laminating multiple sheets to a direction pulling against each other on a disk-shaped magnet plate 30A formed by a permanent magnet, namely, a direction in which a S pole face and a N pole face are faced with each other. The laminating direction of the magnet core 30 is coincided with an X direction, and an upper end face of the magnet core 30 is located lower than an upper end face of the laminated elastic body 16. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a laminated support.

  Conventionally, a laminated support in which soft plates such as rubber and hard plates such as metal are alternately laminated has been used as a support piece for a seismic isolation device. Then, as shown in FIG. 6, a hole 52 is formed at the center of the laminated support 50, and a plurality of plates are laminated as friction plates 54 in the hole 52 to provide a function as a damper. (Patent Document 1).

However, in the technique described in Patent Document 1, a force in the stacking direction on the friction plate 54 (hereinafter referred to as “axial force J”) is used to make the frictional force between the plurality of friction plates 54 a desired magnitude. Need to use. Since this axial force J varies depending on the load of the supported body supported by the laminated support body 50, it is difficult to obtain a desired frictional force. Since the energy that can be absorbed by the plurality of friction plates 54 depends on the frictional force described above, there is a problem that it is difficult to set the energy that can be absorbed.
JP-A-9-217520

  An object of the present invention is to provide a laminated support that can easily set the energy that can be absorbed without depending on the axial force in consideration of the above facts.

  In order to solve the above-mentioned problems, the laminated support of the present invention is configured by alternately laminating rigid hard plates and elastic elastic plates in a predetermined laminating direction. A laminated elastic body that supports a load and a plurality of magnet plates that are provided inside the laminated elastic body and have a magnetic force are brought into contact with each other in a direction that attracts each other, and are laminated in the same direction as the laminating direction. A magnet core in which the plurality of magnet plates are displaced from each other when shearing is deformed in a direction perpendicular to the stacking direction, and load reducing means for reducing a load from the supported body to the magnet core. Yes.

  In the laminated support body having the above configuration, the laminated elastic body is configured by alternately laminating rigid hard plates and elastic elastic plates in a predetermined laminating direction, and loads the supported body in the laminating direction. To support. The magnet core is provided inside the laminated elastic body, and is laminated in the same direction as the laminating direction of the laminated elastic body by contacting a plurality of magnetic plates having magnetic force in a direction that attracts each other. The plurality of magnet plates constituting the magnet core are displaced from each other when the laminated elastic body undergoes shear deformation in a direction orthogonal to the lamination direction. In the magnet core, the load from the supported body is reduced by the load reducing means. Here, the load reducing means includes means for preventing any load from the supported body. Examples of the load reducing means include means for providing a recess on the supported body side or the magnet core side so that the supported body does not contact the magnet core. Since the magnet core has such load reducing means, it is not affected by the axial force or can reduce the influence of the axial force. On the other hand, since the laminated magnet plates are attracted to each other by a magnetic force, a predetermined frictional force can be obtained without any load on the supported body when they are shifted in a direction perpendicular to the laminating direction.

  Therefore, according to the laminated support body of the present invention, the desired energy absorption force can be easily set by the frictional force due to the magnetic force not using the axial force and the mitigating means for reducing the axial force.

  The laminated elastic body of the laminated support according to the present invention has a cylindrical shape in which a hollow is formed in the laminating direction, the magnet core is provided in the hollow, and one end face is formed as described above. It can also be characterized in that it is arranged on the inner side in the laminating direction than the end face of the laminated elastic body.

  According to the said structure, the load from a to-be-supported body can be avoided with a simple structure by arrange | positioning one end surface of a magnet core inside a lamination direction rather than the end surface of a lamination | stacking elastic body.

The layered support of the present invention, as described in claim 3, it is preferable force magnet plate attract each other is 1N / mm ² or more 50 N / mm ² or less.

Since energy absorption by the magnet core depends on the magnetic force between the magnet plates, the absorbed energy can be changed by changing the magnetic force. However, the force with which the magnet plates attract each other is 1 N / mm ² or more as described above. 50 N / mm ² or less is preferable.

  Moreover, as for the laminated support body of this invention, it is preferable that the friction coefficient between several magnet plates is 0.2-0.5.

  Since the plurality of magnet plates are in contact with each other, the frictional force varies depending on the surface roughness of the contact surface. Therefore, the absorbed energy can be changed by changing the friction coefficient between the plurality of magnet plates, but the friction coefficient between the plurality of magnet plates is preferably 0.2 or more and 0.5 or less.

  In addition, the laminated support of the present invention is characterized in that, as described in claim 5, the laminated elastic body includes end face plates that are laminated so as to protrude in the surface direction of the both end faces. it can.

  By providing such an end face plate, the supported body can be easily supported.

  Since the laminated support of the present invention has the above configuration, the energy that can be absorbed can be set easily without depending on the axial force.

  As shown in FIG. 1, the laminated support 12 of the present invention is formed by alternately laminating a plurality of disc-shaped metal plates 18 and a plurality of disc-shaped rubbers 20 in the thickness direction (hereinafter, this laminating direction). (Referred to as “X direction”). A hollow portion 28 that penetrates the laminated elastic body 16 in the X direction is formed at the center of the laminated elastic body 16. The hollow portion 28 is a cylindrical space.

  A magnet core 30 is inserted into the hollow portion 28, and the inserted magnet core 30 is in close contact with the laminated elastic body 16 constituting the hollow portion 28. As shown in FIG. 4, the magnet core 30 is formed by laminating a plurality of disk-shaped magnet plates 30A composed of permanent magnets in the direction in which they are attracted to each other, that is, in the direction in which the S pole face and the N pole face face each other. Configured. As shown in FIG. 2, the lamination direction of the magnet core 30 coincides with the X direction, and the upper end surface of the magnet core 30 is located below the upper end surface of the laminated elastic body 16.

  A coated rubber 26 is provided on the side surface of the laminated elastic body 16. The metal plate 18 is covered with the covering rubber 26, so that the metal plate 18 is prevented from being deteriorated.

  At both ends in the X direction of the laminated elastic body 16, mounting plates 22 and 24 having a disk shape and a diameter larger than the diameter of the laminated elastic body 16 are fixed. The mounting plates 22 and 24 are fixed to the laminated elastic body 16 with the central axis thereof coinciding with the central axis of the laminated elastic body 16 and the outer edge portion protruding from the end surface of the laminated elastic body 16. As shown in FIG. 2, a gap is formed between the mounting plate 22 and the magnet core 30. The mounting plates 22 and 24 are fixed to the ground 42 and the building 40, respectively.

In this state, as shown in FIG. 3, when the ground 42 and the building 40 are relatively moved in the horizontal direction, the laminated elastic body 16 undergoes shear deformation in the same direction. By this shear deformation, the energy of relative movement between the ground 42 and the building 40 is absorbed. Further, when the laminated elastic body 16 undergoes shear deformation, the magnet core 30 is deformed when each magnet plate 30A is displaced in the same direction, and functions as a damper. The frictional force M between the rubbers 20 at this time is such that a gap is formed between the magnet core 30 and the mounting plate 24, and the magnet core 30 does not bear the load of the building 40. Assuming that the pulling force is P and the friction coefficient of the magnet plate is μ,
M = μP. That is, the frictional force M is not affected by the load of the building 40. The tensile force P between the magnet plates 30A can be easily changed by changing the magnetic force of the magnet plate 30A, and the friction coefficient μ can be easily changed by changing the surface roughness of the plate surface of the magnet plate 30A. Therefore, compared with the case where the load of the building 40 is received, a desired energy absorbing power in the horizontal direction can be set easily.

  In the present embodiment, the upper end surface of the magnet core 30 is positioned below the upper end surface of the laminated elastic body 16 so that the magnet core 30 does not bear the load of the building 40. The upper end surface of the mounting plate 24 is positioned on the same plane as the upper end surface of the laminated elastic body 16, and as shown in FIG. It is also possible to prevent 30 from bearing the load of the building 40, or to configure the hole 24B in a portion facing the magnet core 30 of the mounting plate 24 so that the magnet core 30 does not bear the load of the building 40. Furthermore, a recess may be provided on the building 40 side so that no load is applied to the magnet core 30. In particular, with the configuration as in the present embodiment, it is not necessary to perform special processing on the mounting plate 24, and a simple configuration can be achieved.

Further, the energy that can be absorbed by the magnet core 30 can be adjusted by changing the force (magnetic force) that the magnet plates 30A attract each other. However, considering that the magnet core 30 functions as a damper, the magnet plates 30A The attractive force is preferably 1 N / mm ² or more and 50 N / mm ² or less.

  The coefficient of friction between the magnet plates 30A is preferably 0.2 or more and 0.5 or less.

  The magnet plate 30A is made of a ferromagnetic material, a rare earth bonded magnet (NdFe, SmCo, SmFeN), a rare earth sintered magnet (NdFeB, SmCo), ferrite sintered, ferrite bonded, alnico, etc. Can be used.

It is a perspective view which shows the laminated support body of this embodiment partially broken. It is sectional drawing of the lamination | stacking support body of this embodiment. It is sectional drawing which shows the state which the lamination | stacking elastic body and magnet core of the lamination | stacking support body of this embodiment deform | transformed by the relative movement of a building and the ground. It is a perspective view which shows a part of magnet plate of this embodiment. It is sectional drawing which shows the modification of the laminated support body of this embodiment. It is sectional drawing which shows a prior art example.

Explanation of symbols

12 Laminated support 16 Laminated elastic body 18 Metal plate (hard plate)
20 Rubber (elastic plate)
22 Mounting plate (end face plate)
24A Concavity (load reduction means)
24B hole (load reduction means)
24 Mounting plate (end face plate)
28 Hollow part (hollow)
30 Magnet core 30A Magnet plate 40 Building (supported body)

Claims (5)

A laminated elastic body configured by alternately laminating rigid rigid plates and elastic elastic plates in a predetermined laminating direction, and supporting the load of the supported body in the laminating direction;
Provided inside the laminated elastic body, a plurality of magnet plates having magnetic force contact each other in a direction attracting each other and laminated in the same direction as the laminating direction, and the laminated elastic body undergoes shear deformation in a direction perpendicular to the laminating direction. A magnet core in which the plurality of magnet plates are displaced from each other when
A load reducing means for reducing a load from the supported body to the magnet core;
A laminated support comprising:   The laminated elastic body has a cylindrical shape in which a hollow is formed in the laminating direction, the magnet core is provided in the hollow, and one end surface is arranged on the inner side in the laminating direction than the end surface of the laminated elastic body. The laminated support according to claim 1. The laminated support according to claim 1 or 2, wherein a force with which the magnet plates attract each other is 1 N / mm ² or more and 50 N / mm ² or less.   The laminated support according to any one of claims 1 to 3, wherein a friction coefficient between the plurality of magnet plates is 0.2 or more and 0.5 or less.   The laminated support according to any one of claims 2 to 4, further comprising an end face plate that is laminated on both end faces of the laminated elastic body so as to protrude in a surface direction of the both end faces.

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