JP2000055122A - Laminate rubber bearing body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminate rubber bearing body whereby the displacement followup ability for a lifting force generated with an earthquake, etc., is enlarged and whose rigidity does not lower even after receiving a lifting force. SOLUTION: A restrained displacement followup means 8 is configured with a resilient rod 9 of rubber which penetrates a through hole 6 formed across the thickness of a bearing body 3, as shown in the attached illustration, and engaging members 11 on flange which are fixed to the two ends of the rod 9 using bolts and engaged with the engagement part of an upper plate 1 with a spot facing 7a on a lower plate 2. The engaging members 11 are made of metal, adhered vulcanizedly to the end faces of the rod 9, and fastened in the central parts by bolts, etc., as described above.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated rubber bearing for protecting a structure from an earthquake or the like, and more particularly, to a structure capable of following and deforming the structure when an upward lift is applied to the structure. The present invention relates to a laminated rubber bearing body as described above.

[0002]

2. Description of the Related Art Conventionally, a laminated rubber bearing member for protecting a structure from an earthquake or the like is interposed between the ground and the structure, and is composed of an upper plate to which the structure is fixed and a ground side. Generally, a plurality of rubber-like elastic plates and steel plates are alternately laminated and vulcanized and bonded to a fixed lower plate.

[0003]

However, since the above-mentioned laminated rubber support is fixed to the upper plate and the lower plate on the upper and lower surfaces thereof, the laminated rubber support has an upward lift (upward) due to an earthquake or the like. Force) occurs,
There is a problem that a vertical tensile force acts on the laminated rubber support, and when the stress is large, a large number of voids (voids) are generated inside the support, and the rigidity thereafter decreases.

[0004] It is an object of the present invention to provide a laminated rubber bearing body which has a large displacement follow-up ability with respect to an upward lift generated by an earthquake or the like and does not decrease its rigidity even after receiving the upward lift.

[0005]

According to the present invention, in order to achieve the above object, at least one or more constraint displacement follow-up means for connecting a support body and an upper and lower plate and capable of deforming to follow up-lift force. It is the gist of the provision. The present invention is directed to a rubber-like elastic rod configured to penetrate through a through-hole formed in a thickness direction of a support body, the rubber-like elastic rod having a restraint displacement follow-up means for connecting the support body and the upper and lower plates. By comprising an engaging member on a flange fixed to both ends of the rod and engaging with an engaging portion between the upper plate and the lower plate, a displacement follow-up ability to an upward lift generated by an earthquake or the like is increased. Thus, a laminated rubber bearing body which does not decrease in rigidity even after receiving an upward lift can be obtained.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of a laminated rubber bearing body embodying the present invention, in which 1 is an upper plate connected and fixed to an upper structure W, 2 is a lower plate fixed to the ground G, and 3 is a plurality of rubber plates. FIG. 1 shows a bearing body formed by alternately laminating rubber-like elastic plates 4 (rubber plates) and steel plates 5, and this bearing body 3 is an adhesive type in which rubber-like elastic plates 4 (rubber plates) and steel plates 5 are bonded. Alternatively, any non-adhesive type may be used.

At least one or more through holes 6 are formed in the support body 3 in the thickness direction, and the upper plate 1 and the lower plate 2 are counterbore corresponding to the through holes 6. A through hole 7 provided with 7a is formed. As shown in FIG. 2, a constraint displacement follower capable of following and deforming an upper lift F generated by an earthquake or the like is provided in a through hole 7 and a counterbore 7a formed in the support body 3 and the upper plate 1 and the lower plate 2. Means 8 are provided.

As shown in FIG. 3, the restraint displacement follower 8 includes a rubber elastic rod 9 inserted into a through hole 6 formed in the thickness direction of the support 3 and two ends of the rubber elastic rod 9. It comprises an engaging member 11 on a flange which is fixed via a bolt 10 and which engages with an engaging portion of a counterbore 7a between the upper plate 1 and the lower plate 2. The engaging member 11 is made of a metal material, and is vulcanized and bonded to both end surfaces of the rubber-like elastic rod 9, and the central portion is fastened by the bolt 10 or the like as described above.

It is to be noted that the constraint displacement follow-up means 8 can be provided at several places in the plane of the support 3. The present invention is configured as described above, and when an upward lift F is generated in the upper structure W due to an earthquake or the like and the upward lift F acts on the support 3, as shown in FIG. The mounted upper plate 1 is lifted upward, but is separated from the support body 3 at that time, so that the rubber-like elastic rod 9 of the constraint displacement follower 8 embedded inside the support body 3 It is elastically deformed and extended via the engaging member 11 which engages with the counterbore 7a.

Therefore, the upper lift F does not affect the bearing 3 at all, and the rigidity does not decrease even when the upper lift F is subjected to a shear deformation force Fa as shown in FIG. . Further, if the non-adhesive type is used as the support body 3 as described above, processing (reduction of vulcanization time) can be facilitated as compared with the adhesive type.

[0011]

According to the present invention, since the support body and the upper and lower plates are connected as described above, and at least one or more constraint displacement follow-up means capable of deforming to follow the upward lift is provided at at least one place, the present invention is applicable to earthquakes and the like. The displacement following ability with respect to the generated upward lift is increased, and there is an effect that a bearing body which does not decrease in rigidity even after receiving the upward lift can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a laminated rubber bearing body embodying the present invention.

FIG. 2 is an explanatory diagram when a laminated rubber bearing body embodying the present invention receives an upward lift.

FIG. 3 is an enlarged sectional view of a portion A in FIG. 1;

FIG. 4 is a cross-sectional view when a laminated rubber bearing body receives a shearing deformation force.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Upper plate 2 Lower plate 3 Bearing 4 Rubber elastic plate (rubber plate) 5 Steel plate 6 Through hole 7 Through hole 7a Counterbore 8 Restraint displacement follow-up means 9 Rubber elastic rod 10 Bolt 11 Engaging member W Upper structure G Ground F Lifting force Fa Shearing force

Claims (3)

[Claims] Claims: 1. An upper plate and a lower plate,
In a laminated rubber bearing body having a bearing body formed by alternately laminating a plurality of rubber-like elastic plates and steel plates, the bearing body and the upper and lower plates are connected, and can be deformed to follow uplift. A laminated rubber bearing body provided with at least one or more restricted displacement follow-up means. 2. A rubber-like elastic rod inserted through a through hole formed in a thickness direction of a support body, wherein the restraint displacement follow-up means is provided;
2. The laminated rubber bearing according to claim 1, comprising a flange-shaped engaging member fixed to both ends of the rubber-like elastic rod and engaging with an engaging portion between the upper plate and the lower plate. 3. The laminated rubber bearing according to claim 1, wherein the bearing uses an adhesive type or a non-adhesive type in which the rubber-like elastic plate and a steel plate are bonded.