JP2000274483A - Lead plug-contained lamination rubber support body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lead plug-contained lamination rubber support body to safely exhibit a tensile force by the outer cylinder of the lamination rubber support body when a tensile force is exerted on an upper structure and provide a prolonged life for a lead plug. SOLUTION: A lamination rubber support body 10 is provided with upper and lower face plates 11a and 11b and a cylindrical hollow part 14 is vertically formed at the central part of the rubber support body where a plurality of steel sheets 12 and rubber sheets 13 are alternately laminated to form a lamination rubber outer cylinder 15. At a hollow part 14, a lead plug cassette member 18 that the outer peripheral surface of a lead plug 16 is covered with a flexible member 17, such as rubber, with a gap X therebetween and formed into a cassette is contained in a hollow part 14 and a lamination rubber outer cylinder 15 and a lead plug cassette member 18 are formed in a separation state.

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 body containing a lead plug, and more particularly, to a laminated rubber outer cylinder made of a rubber bearing body, and a flexible member formed on the outer peripheral surface of a lead plug housed therein. By separating and separating the lead plug cassette member coated with, the durability of the laminated rubber outer cylinder can be improved, the service life can be extended, and it can be manufactured easily and inexpensively. The present invention relates to a laminated rubber bearing body containing a lead plug which can be easily replaced.

[0002]

2. Description of the Related Art Various types of laminated rubber bearings containing lead plugs have heretofore been proposed. For example, as disclosed in Japanese Patent Publication No. 19407/1992, upper and lower plates are provided. And a structure in which a lead plug covered with a flexible material is tightly sealed in a central hollow portion of a rubber bearing main body in which a plurality of steel plates and rubber sheets are alternately laminated, and Japanese Patent Application Laid-Open No. 9-151988 and As shown in FIG. 9, a structure in which a lead plug 4 whose outer peripheral surface is laminated and covered with a nylon protective ring 3 is fitted into a central hollow portion 2 of a rubber bearing main body 1, and further, as shown in FIG. The lead plug 4 is sealed in the body 1 under a hydrostatic pressure condition.
As shown in FIG. 1, a lead nucleus 6 is placed in a laminated stainless steel plate 5 and a metal pin 7 is penetrated for uniform shearing.

[0003]

However, since the structure of the above-described conventional laminated rubber support containing lead plugs is a structure in which a lead plug is closely attached to the hollow interior of the rubber support 1, the above-mentioned structure is not applicable. When the bearing 1 is deformed by a tensile force acting in the vertical direction, there is a problem that the bearing 1 is extended following the tensile deformation of the rubber bearing 1, and a lead plug can be used when the rubber bearing 1 is sheared. There is a problem that the flexible material is pierced and penetrates into the rubber bearing 1, and the restoring force is impaired so that the original function of the laminated rubber bearing cannot be sufficiently exhibited.

[0004] It is an object of the present invention to separate the outer cylinder of the laminated rubber bearing from the lead plug housed therein, and to make the lead plug into a cassette so that the pulling force is increased by the upper structure. If this occurs, the outer cylindrical part of the laminated rubber bearing can safely cope with the pulling force, so that the life of the lead plug can be extended, and the production of the laminated rubber bearing containing the lead plug can be easily performed. It is another object of the present invention to provide a laminated rubber bearing with a lead plug which can easily replace the lead plug and can reuse the outer cylinder of the laminated rubber bearing.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a laminated rubber outer cylinder comprising a rubber bearing having a hollow portion at the center, a fitting in the hollow portion and an outer peripheral surface. The gist of the present invention is that the lead plug cassette member which is covered with a flexible member and formed into a cassette is separated from the lead plug cassette member.

According to the present invention, the outer cylinder of the laminated rubber bearing is separated from the lead plug housed therein, and the lead plug is formed into a cassette.
In addition, since the laminated rubber bearing and the lead plug made into a cassette are arranged at a predetermined interval, when a pulling force such as wind (upward and downward acting force) acts on a lightweight structure such as a detached house. In addition, no tensile force is applied to the lead plug, and the laminated rubber outer cylinder on the outer periphery corresponds to the tensile force, so the laminated rubber bearing can safely exert the tensile force, and the lead plug is deformed by the tensile deformation As a result, the life can be extended.

Further, since the laminated rubber outer cylinder and the lead plug cassette member are assembled with a predetermined gap therebetween, the restoring force is impaired even when the laminated rubber bearing body undergoes shear deformation. Without this, the original seismic isolation function of the laminated rubber bearing can be fully demonstrated.

Further, by making the lead plug into a cassette,
The product can be manufactured easily because it can be manufactured separately from the laminated rubber outer cylinder, and the lead plug cassette can be replaced with a new one, so the external bearing can be reused. You can do it.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a lead rubber-containing laminated rubber bearing according to a first embodiment of the present invention. The laminated rubber bearing main body 10 includes upper and lower face plates 11a, 11a.
b, and a laminated rubber outer cylinder 15 is formed by vertically forming a cylindrical hollow portion 14 at the center of a rubber bearing body in which a plurality of steel plates 12 and rubber sheets 13 are alternately laminated, In the hollow portion 14, the outer peripheral surface of the lead plug 16 is separated from the outer peripheral surface of the lead plug 16 by a predetermined gap X. In this embodiment, a plurality of steel plates and rubber sheets are alternately laminated. (It is composed of rubber bearings, but rubber material alone may be used.)
Lead plug cassette member 1 covered and formed into a cassette
8 are housed therein, and the laminated rubber outer cylinder 15 and the lead plug cassette member 18 are configured separately.

As described above, the laminated rubber outer cylinder 15 composed of the laminated rubber bearing member and the lead plug cassette member 18 are separated from each other, and the inner wall surface of the hollow portion 14 of the laminated rubber outer cylinder 15 and the lead plug cassette member are separated. 18 is attached with a predetermined gap X therebetween. For example, even when a pulling force such as wind (upward-downward acting force) acts on a lightweight structure such as a detached house, the lead plug 16 is pulled. No force acts,
Since the laminated rubber outer cylinder 15 on the outer periphery corresponds to the tensile force, the laminated rubber bearing body can safely exert the tensile force, and the lead plug 16 is not subjected to the tensile deformation, so that the life is extended. Can be done.

Further, since the laminated rubber outer cylinder 15 and the lead plug cassette member 18 are assembled with a predetermined gap X therebetween, the restoring force is impaired even when the laminated rubber bearing body 10 undergoes shear deformation. It is possible to fully demonstrate the inherent seismic isolation function of the laminated rubber bearing without saying that it is.

Further, since the lead plug 16 is made into a cassette, it can be manufactured separately from the laminated rubber outer cylinder 15, so that the manufacturing can be facilitated and the productivity can be improved. Can be replaced with a new one, so that the external bearing can be reused.

FIGS. 2 to 4 show a second embodiment of the present invention. In this embodiment, the outer peripheral surface of a lead plug 16 is covered with a flexible member 17 such as rubber to form a cassette. At the upper end of the lead plug cassette member 18, a concave portion 1 is provided at the center.
A lead plug cassette member 18 formed integrally with a truncated cone-shaped head 20 formed with a projection 9 and formed on the lower surface of the upper face plate 11a with a projection 21 engaged with the recess 19 is formed. It is configured to be held in the hollow portion 14 of the laminated rubber outer cylinder 15 with a gap X therebetween. Note that other configurations and operations are the same as those of the first embodiment, and thus the same reference numerals are given and the description is omitted.

FIG. 5 shows a third embodiment of the present invention. In this embodiment, a hollow portion 14a formed in the center of the laminated rubber outer tube 15 has a diameter from the lower end to the upper end. The lead plug cassette member 18a is formed to have an enlarged taper shape, and the outer peripheral surface of the truncated cone-shaped lead plug 16a is covered with a flexible member 17a such as rubber so that the lead plug cassette member 18a is fitted into the tapered hollow portion 14a. It is configured to be a cassette, and to be fitted to the hollow portion 14a with a predetermined gap X therebetween. Note that other configurations and operations are the same as those of the first embodiment, and thus the same reference numerals are given and the description is omitted.

FIGS. 6 to 8 show a third embodiment of the present invention. A twist lock plug 22 is detachably mounted on the lead plug cassette member 18b. Is formed with a concave portion 23 into which a tool such as a flathead screwdriver is inserted, and a projection 24 for locking is formed at a lower portion thereof.
Is rotated by 90 degrees, the projection 24 is hooked on the lower portion of the face plate 11a, and when rotated by 90 degrees, the engagement state of the projection 24 is released and the twist lock plug 22 can be removed. The lead plug cassette member 18b is easily inserted into and removed from the hollow portion 14 formed at the center. Further, instead of the twist lock plug 22, another detachable plug such as a threaded plug may be used. Note that other configurations and operations are the same as those of the first embodiment, and thus the same reference numerals are given and the description is omitted.

Further, the rubber portion of the laminated rubber outer cylinder 15 and / or the lead plug cassette member 1 in each of the above embodiments.
Flexible member 1 covering outer peripheral surfaces of 8, 18a and 18b
7, 17a are made of high-damping rubber to increase the damping force against vertical pulling force and shearing deformation, so that the function as a seismic isolation device is sufficiently exhibited.

[0017]

According to the present invention, there is provided a laminated rubber outer cylinder comprising a rubber bearing having a hollow portion in the center as described above, and a flexible member covering the outer peripheral surface fitted in the hollow portion. Since the lead plug cassette member formed as a cassette is separately formed, the following excellent effects can be obtained. . Even when a pulling force (vertical acting force) such as wind acts on a lightweight structure such as a single-family house, the lead plug does not apply a pulling force, and the outer peripheral rubber outer cylinder responds to the pulling force. Therefore, the laminated rubber bearing can safely exert a tensile force, and the lead plug is not subjected to tensile deformation, so that the life can be extended. . Since the laminated rubber outer cylinder and the lead plug cassette member are assembled with a predetermined gap in between, the laminated rubber bearing does not say that the restoring force is impaired even if shear deformation occurs in the laminated rubber bearing body. The body's natural seismic isolation function can be fully demonstrated. . By making the lead plug into a cassette, it can be manufactured separately from the laminated rubber outer cylinder, so that the manufacture is easy and the productivity can be improved. . Since the cassette part of the lead plug can be replaced with a new one, the external bearing part can be reused.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a lead rubber-containing laminated rubber support showing a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of the upper side of a laminated rubber bearing body containing lead plugs, showing a second embodiment of the present invention.

FIG. 3 is a perspective view of a lead plug cassette member according to a second embodiment of the present invention.

FIG. 4 is a sectional view of the lead plug cassette member of FIG. 3;

FIG. 5 is a cross-sectional view of a laminated rubber support containing lead plugs showing a third embodiment of the present invention.

FIG. 6 is a sectional view of a laminated rubber support containing lead plugs showing a fourth embodiment of the present invention.

FIG. 7 is a perspective view of a twist lock plug used in a fourth embodiment.

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is a sectional view of a conventional laminated rubber bearing body containing a lead plug.

FIG. 10 is a sectional view of another conventional laminated rubber bearing body containing a lead plug.

FIG. 11 is a cross-sectional view of another conventional laminated rubber bearing body containing a lead plug.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Laminated rubber support main body 11a, 11b Upper and lower plate 12 Steel plate 13 Rubber sheet 14 Hollow part 15 Laminated rubber outer cylinder 16 Lead plug 17 Flexible member 18 Lead plug cassette member 19 Concave part 20 Frustoconical head 21 Convex part 22 Twist lock plug 23 Recess 24 Projection X gap

Continued on the front page (72) Inventor Yukio Nakamura 2-1 Oiwake, Hiratsuka-shi, Kanagawa F-term in Hiratsuka Works of Yokohama Rubber Co., Ltd. (Reference) 3J048 AA02 BA08 BB03 BC10 DA01 EA38 3J066 AA01 AA26 BA01 BA03 BB01 BE06 BF01 4F100 AB03A AB08 AN00B BA05 DC11A DC11B DD25 GB90

Claims (5)

[Claims] 1. A laminated rubber bearing containing lead plugs, wherein a lead plug is sealed along the axial direction at the center of a rubber bearing body having upper and lower plates and a plurality of steel plates and rubber sheets alternately laminated. A laminated rubber outer cylinder comprising a rubber bearing body having a hollow portion at the center thereof, and a lead plug cassette member fitted into the hollow portion and formed into a cassette by covering the outer peripheral surface with a flexible member. And a laminated rubber bearing body containing lead plugs. 2. The laminated rubber bearing body containing a lead plug according to claim 1, wherein the lead plug cassette member is accommodated in a hollow portion of the laminated rubber outer cylinder with a gap therebetween. 3. The laminated rubber containing lead plugs according to claim 1, wherein the hollow portion of the laminated rubber outer cylinder is formed in a tapered shape, and a lead plug cassette member accommodated in the hollow portion is formed in a tapered shape. Bearing body. 4. The lead plug according to claim 1, wherein the flexible member covering the rubber portion of the laminated rubber outer cylinder and / or the outer peripheral surface of the lead plug cassette member is made of high-attenuation rubber. Laminated rubber bearing. 5. The laminated rubber bearing body containing a lead plug according to claim 1, wherein the lead plug cassette member is configured to be able to be taken in and out by a removable plug.