JPH0571106A - Sliding and elastic lower shoe for bridge or building - Google Patents

Abstract

PURPOSE:To prevent foreign matter from entering between sliding surfaces by positioning the upper end surface of a seal portion substantially on the same plane as the sliding surface and surrounding the sliding surface with the seal portion. CONSTITUTION:An elastic member 20 is formed by a sliding surface forming steel plate 30, a deformation restraining steel plate 32, an elastic rubber deformation layer 34 and a unflat absorbing layer 36. The upper end surface of a seal portion 22 is positioned substantially on the same plane as a sliding surface 24, and the periphery of the sliding surface 24 is surrounded with the seal portion 22 to form a sliding and elastic lower side member 10. The sliding surface 24 of the lower shoe, member 10 comes into contact with the sliding surface of a lower member fitted to the upper structure of a bridge, and the seal portion 22 comes into contact with the sliding surface of the lower shoe member so that foreign matter is prevented from entering between the sliding surfaces.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding and elastic lower shoe member for bridges or construction.

[0002]

2. Description of the Prior Art Bearings are provided at these boundaries in order to transfer forces from the upper structure of the bridge to the lower structure.
This bearing is generally classified into a fixed bearing and a movable bearing,
Among the categories of movable bearings are sliding bearings and elastic bearings.

The sliding bearing is composed of an upper shoe member attached to the upper structure of the bridge and a lower shoe member attached to the lower structure of the bridge. Each of the upper shoe member and the lower shoe member is provided with a sliding surface, and the upper shoe member slides on the lower shoe member in a state where these sliding surfaces are in contact with each other. This makes it possible to absorb horizontal expansion and contraction of the bridge superstructure due to temperature changes and the like.

The elastic bearing is composed of a lower shoe member attached to the lower structure of the bridge, and the lower shoe member is made of an elastic member such as rubber. The rotation of the upper structure of the bridge or the vibration of the upper structure caused by the bending of the upper structure of the bridge due to the live load is absorbed by the deformation of the elastic member.

A sliding and elastic bearing in which a sliding bearing and an elastic bearing are combined is also known. For sliding and elastic bearings,
The lower shoe member of the sliding bearing is composed of an elastic member. The horizontal expansion and contraction of the upper structure of the bridge is absorbed by the sliding of the upper member with respect to the lower member, and the rotation of the upper structure of the bridge is absorbed by the deformation of the lower member.

[0006]

In such a sliding and elastic bearing, foreign matter such as sand, dust, and dust enters between the sliding surface of the upper and lower sliding members, and the sliding surface is damaged. There is a problem of sticking.

In order to solve this problem, as shown in the sectional view of FIG. 4, the edge portion 52 of the upper gear member 50 parallel to the moving direction of the upper structure of the bridge is bent downward, Sliding and elastic bearings are known which prevent foreign objects from entering between the sliding surfaces by the edge 52. However, the sliding and elastic bearing having such a structure effectively prevents foreign matter from entering the sliding surface because foreign matter enters the sliding surface from between the bent edge portion 52 and the lower gear member 54. I can't. Further, in such a structure, foreign matter attached to the sliding surface of the upper shoe member 50 is prevented from entering between the sliding surface of the upper shoe member and the sliding surface of the lower shoe member when the upper shoe member slides. I can't. Further, the upper shoe member 5
Since the edge portion 52 of 0 is bent, the upper gear member 50
The movement direction of is restricted. That is, there is also a problem that such bearings are not omnidirectional and are not suitable for application to oblique bridges or curved bridges.

When a building or a building member is supported by a building support member, a sliding and elastic bearing may be provided at the boundary between them. In this case, the upper shoe member is installed on the building or building member, and the lower shoe member is installed on the building support member, but the same problem as the above-mentioned problem described in the slide and elastic bearing for bridge, that is, the sliding surface There is a problem of damage or slip and directionality of elastic bearing.

Therefore, an object of the present invention is to provide a sliding and elastic lower shoe member which can effectively prevent foreign matter from entering a sliding surface and is omnidirectional.

[0010]

The object of the present invention is to provide a sliding surface,
A sliding and elastic lower shoe member comprising an elastic member that can be installed in a substructure of a bridge or a supporting member for construction, further comprising a seal portion that surrounds the sliding surface and has an upper end surface that is substantially flush with the sliding surface. This is achieved by the sliding and elastic lower shoe member characterized by the above.

Although the elastic member and the seal portion may be separately formed and then processed integrally, it is preferable to integrally form the elastic member and the seal portion.

The sliding surface is made of a fluororesin layer such as polytetrafluoroethylene, and at least a part of the integrally formed elastic member and the seal portion are made of chloroprene synthetic rubber or natural rubber. Is more preferable. The elastic member may be of a multi-layered type in which one or more reinforcing plates are put in order to reduce the change in height and at the same time increase the supporting force, or a type in which a ring is embedded to suppress bulging. You can also

[0013]

The sliding surface of the sliding and elastic lower shoe member of the present invention comes into contact with the sliding surface of the upper shoe member attached to the upper structure of the bridge. Further, the seal portion surrounding the sliding surface of the sliding / elastic lower shoe member also contacts the sliding surface of the upper shoe member. Therefore, this seal portion can very effectively prevent foreign matter from entering between the sliding surfaces, and can make the bearing omnidirectional.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the sliding and elastic lower shoe member of the present invention will be described below with reference to FIGS.

FIG. 1 is a sectional view of a sliding and elastic lower shoe member 10. In FIG. 1, the elastic member 20 includes a sliding surface forming steel plate 30, a deformation suppressing steel plate 32, an elastic rubber deformation layer 34, and a non-absorption layer 36. The seal portion 22, the elastic rubber deformable layer 34, and the uneven absorption layer 36 are integrally formed. The sliding surface 24 is disposed on the sliding surface forming steel material 30. The upper end surface of the seal portion 22 is located substantially flush with the sliding surface 24, and the seal portion 22 surrounds the periphery of the sliding surface 24. Note that, in FIG. 1, the vertical dimension is exaggerated more than the horizontal dimension.

FIG. 2 is a perspective view of the sliding and elastic lower shoe member 10 of the present invention shown in FIG. In FIG. 2, 22 is a seal part and 24 is a sliding surface.

FIG. 3 shows a slippery and elastic lower shoe member 10 of the present invention.
Is installed between the upper structure 40 and the lower structure 42 of the bridge. The sliding and elastic lower shoe member 10 has a lower structure 42.
It is installed in. The upper shoe member 44 is installed in the upper structure. The upper shoe member 44 is disposed in contact with the sliding and elastic lower shoe member 10 in contact therewith.

The plane shape of the sliding and elastic lower shoe member is rectangular,
It may have any shape such as a circle. The size and thickness of the sliding and elastic lower shoe member and the structure of the elastic member depend on the characteristics required for the lower shoe member.

The upper end surface of the seal portion should be located substantially flush with the sliding surface. Here, "substantially flush with each other" means that, when the upper shoe member is disposed in contact with the lower shoe member, the upper end surface of the seal portion and the sliding surface of the upper shoe contact each other. It means an arrangement relationship.

Although the sliding and elastic lower shoe member of the present invention has been described based on an embodiment, the present invention is not limited to this. For example, the elastic member is formed into a cylindrical shape, a sliding surface is provided on the upper end surface of the elastic member, and the seal portion is formed into a ring shape. It can also be formed.

Further, the case where the sliding and elastic lower shoe member of the present invention is used for a bridge has been described in detail, but the sliding and elastic lower shoe member of the present invention is not limited to such a bridge field. The sliding and elastic lower shoe member of the present invention is also suitable for being installed on a building support member and can be applied to the building field.

[0022]

According to the present invention, the seal portion of the sliding and elastic lower shoe member surrounds the sliding surface of the lower shoe member and surely contacts the sliding surface of the upper shoe member. Therefore, this seal portion can very effectively prevent foreign matter from entering between the sliding surfaces, and can make the bearing omnidirectional.

[Brief description of drawings]

FIG. 1 is a sectional view of a sliding and elastic lower shoe member of the present invention.

FIG. 2 is a perspective view of a sliding and elastic lower shoe member of the present invention.

FIG. 3 is a view showing a state in which the sliding and elastic lower shoe member of the present invention is installed on a bridge.

FIG. 4 is a diagram showing an example of a conventional sliding and elastic bearing.

Claims (3)

[Claims] 1. A sliding and elastic lower shoe member comprising a sliding surface and an elastic member that can be installed on a bridge substructure or a supporting member for construction, the sliding lower surface surrounding the sliding surface and being substantially flush with the sliding surface. A slippery and elastic lower shoe member, further comprising a seal portion on which the end face is located. 2. The sliding and elastic lower shoe member according to claim 1, wherein the elastic member and the seal portion are integrally formed. 3. The sliding surface is made of a fluororesin layer,
3. The sliding and elastic lower shoe member according to claim 2, wherein at least a part of the integrally formed elastic member and the seal portion are made of rubber.