JPH0486Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a support installed between a superstructure and a substructure of a structure such as a bridge.

(Prior Art) Bearings are broadly classified into steel bearings and rubber bearings.

The former absorbs deformations due to expansion, contraction, and rotation of the structure by sliding on low-friction surfaces, while the latter absorbs deformation of the structure by deforming soft rubber or the like.

(Problem that the invention aims to solve) Steel bearings are generally placed between the superstructure and substructure of structures such as bridges, and are designed to withstand the heavy load of the superstructure. Many products can only follow movement in a straight line when expanding and contracting.
In bridges with a wide variety of superstructures, the installation direction cannot necessarily match the expansion/contraction direction, so eccentric loads act on the support body.
This effect causes stress concentration in the member, often leading to damage.

Rubber bearings have omnidirectional properties when it comes to expanding and contracting structures, so there is no need to worry too much about the installation direction. However, there is a limit to the heavy load that can be applied, and in order to satisfy this requirement, a fairly large cross-sectional area is required. Because of this, it is often used for general small loads.

The present invention attempts to solve the above-mentioned disadvantages of steel bearing structures with respect to expansion and contraction by utilizing the omnidirectional advantage of rubber bearings.

[Structure of the idea]

(Means for solving the problem) In other words, the above problem is solved by providing a space larger than the outer surface of the rigid sphere between rigid plates such as steel plates located on the superstructure side and substructure side of the structure. This problem is solved by filling the space with an elastic body and placing a rigid sphere in the space. Note that the space larger than the outer surface of the rigid sphere is a space large enough to allow the rigid sphere located in the space to move by rolling or sliding.

(Function) This method combines the advantages of steel bearings with the advantages of rubber bearings, so it is possible to carry heavy loads with the rigid plates and rigid spheres, and it is possible to reduce the load of the superstructure. The elastic body carries the remaining load, and the rigid sphere carries the remaining load, transmitting the load to the substructure.The structure also takes advantage of the characteristics of the elastic body and rigid sphere, making it possible to move in all directions as the structure expands and contracts. do.

(Example) Next, an example of the present invention will be described based on the drawings.

1, 2, and 3 show an example of the bearing according to the present invention. FIG. 1 shows the bearing in an unloaded state, FIG. 2 shows the bearing in a loaded state, and FIG. 3 shows an example of the bearing in the unloaded state. FIG. 2 shows a cross section of the bearing taken along line A-A.

In the drawing, 3 and 4 are the superstructure 1 side of the structure,
Rigid plate made of steel plate etc. located on the substructure 2 side, 5
6 is an elastic body made of soft rubber or the like, and 6 is a rigid sphere made of a bearing or the like.

A space 7 for the rigid sphere 6 to work effectively is provided between the rigid plate 3 and the rigid plate 4, and is filled with an elastic body 5, and the rigid sphere 6 is inserted into the space 7 and integrated. There is.

In this way a bearing is formed as a whole.

The support formed in this manner is placed between the upper work 1 and the lower work 2 and is in a loaded state as shown in FIG. At this time, some of the load on the superstructure 1 is borne by the elastic body 5, the remaining load is borne by the rigid sphere 6, and is transmitted to the substructure 2. Superstructure 1,
Regarding the expansion and contraction of the substructure 2, the directionality of the elastic body 5,
Since the rigid sphere 6 can roll not only in one direction but can move in all directions, it can follow expansion and contraction in various directions as shown by arrows in FIG.

FIG. 4 shows another embodiment of the bearing in a loaded state between the superstructure and the substructure.

In this embodiment, a space 7 is left between the rigid plates 3 and 4, and a support space 7 made of an elastic body 5 filled with the rigid plate 2 is varied, and a recess is provided in the rigid plate 2 to provide rigidity there. This is the position of the sphere 6.

In this embodiment, the burden of the load on the superstructure 1,
The load is transmitted to the substructure 2 in the same way as in the first embodiment, but expansion and contraction can also be followed by sliding.

(Effect of the invention) Since the invention is made as described above, that is, a space larger than the outer surface of the rigid sphere is provided between the rigid plates and filled with an elastic body, and the rigid sphere is transmitted to the space. Because of the omnidirectional nature of the elastic body and rigid sphere, it is possible to follow expansion and contraction in all directions, not just in a straight line, eliminating stress concentration in the member, and furthermore, the elastic body and rigid sphere share the load. This has the advantage that load transmission can be carried out smoothly.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an example of the bearing according to the present invention, and Figure 2 shows an example of the bearing shown in Figure 1 in a loaded state between the superstructure and substructure of a bridge structure. 3 is a sectional view taken along the line A-A in FIG. 2, and FIG. 4 is a sectional view showing another embodiment. In the drawing, 3 and 4 are rigid plates, 5 is an elastic body,
6 is a rigid sphere, and 7 is space.

Claims (1)

[Scope of utility model registration request] A bearing in which a space larger than the outer surface of the rigid sphere is provided between the rigid plates and filled with an elastic body, and the rigid sphere is positioned in this space.