JPH0248489Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a support used for structures such as bridges, and in particular, the displacement of the structure such as expansion and contraction or inclination due to temperature changes, etc., is suppressed by sliding between the movable body and the upper shoe and/or the lower shoe. The present invention relates to an improved bearing in which a sliding surface is formed by integrally disposing a rust-proof thin plate-like sliding contact plate on the lower surface of the upper shoe and/or the upper surface of the lower shoe that slides on the movable body. be.

Generally used in structures such as bridges, bearings are used to relieve displacement such as expansion, contraction or inclination of the structure, especially the upper structure such as bridge girders, by sliding. The shoe consists of a lower shoe that is fixed to or placed on the upper shoe, and a movable body that is disposed between the upper and lower shoes and makes sliding contact with the lower surface of the upper shoe and/or the upper surface of the upper shoe. These allow the expansion and contraction of the upper structure to escape by bringing the movable body into sliding contact with the lower surface of the upper shoe or the upper surface of the lower shoe,
A rubber elastic body (usually used alone or as a laminate) that slides into sliding contact with the lower surface of the upper shoe or the upper surface of the lower shoe, or is combined with the movable body.
It is released by deforming the .

Bearings configured in this way do not cause any problems during normal use, but when structures such as bridges are constructed in corrosive environments such as coastal areas, there may be problems due to sliding contact with movable objects. Rust occurs on the lower surface of the shoe and/or the upper surface of the lower shoe, which inhibits the sliding contact, and this rust causes a problem in that the function as a support for escaping displacement such as expansion/contraction or tilting is impaired.

In view of these problems, conventional bearings used in corrosive environments are equipped with a thin, rust-free sliding contact plate that is screwed or glued to the lower surface of the upper shoe and/or the upper surface of the lower shoe that slides into contact with the movable body. A method has been proposed in which a sliding contact surface is formed by integrally arranging the sliding contact surface to prevent rust from forming on the sliding contact surface.

However, these methods have the following drawbacks:
That is, in the method of fixing with screws, a plurality of screw holes for fixing the sliding contact plate to the sliding contact surface and an edge portion formed by the head of the screw are formed, and the movable body is scraped by the edge portion during sliding contact, resulting in large wear. Furthermore, the method of adhesion has the drawback that the integration of the sliding contact plate and the upper shoe tends to be unstable, and peeling often occurs, so that the method is not satisfactory.

In view of these drawbacks, a new method has been proposed in which a thin sliding contact plate is welded around the upper shoe and/or the lower shoe, but this method also prevents welding distortion of the sliding contact plate. This has the drawback that a gap is created between the sliding contact plate and the upper shoe and/or the lower shoe, in other words, a smooth sliding surface cannot be obtained.

Therefore, methods as shown in FIGS. 1 to 3 have been proposed (for the sake of explanation, the figures illustrate an embodiment in which a sliding contact plate is disposed on the upper shoe).

That is, in this method, a thin sliding contact plate 3 is provided on the lower surface 2 of the upper shoe 1, a plurality of holes are provided in the sliding contact plate 3, and the upper shoe 1 is
They can be integrated by welding together the hole portions (Fig. 2), or the sliding contact plates 3 can be formed into a plurality of strips, and the sliding contact plates 3 can be arranged in parallel to the upper shoe 1 and welded. In this way, they are integrated (Fig. 3) to form a sliding surface for each, and this has been put into practical use in some cases.

In addition, in Fig. 1, G is the upper structure such as a bridge girder, B is the lower structure such as a bridge pier, 4 is the lower shoe,
5 is a movable body.

However, although this method solves the above-mentioned drawbacks, rust occurs in the welded parts over time, and the rust obstructs the sliding contact between the movable body 5 and the upper shoe 1, and the function as a support. There is a problem that the resistance gradually decreases, and the durability is poor. This is because the welded parts of the sliding contact plate 3 and the upper shoe 1 melt into each other, so that the sliding contact plate 3 at the welded part
This causes a change in composition compared to other parts, in other words, as they melt together, the amount of carbon increases, and conversely, the amount of chromium and nickel decreases, reducing the corrosion resistance of the part, causing rust to occur over time. It is considered to be a thing.

This invention was developed in order to solve the above-mentioned problems, and it is a technology to obtain a bearing with excellent durability that prevents rust from occurring from the welded parts of the sliding contact plate and the upper shoe and/or the lower shoe. This is a major issue.

In order to solve the above problems, the present invention adopts the following technical means (configurations).

That is, it consists of an upper shoe fixed to the upper structure, a lower shoe fixed or placed on the lower structure, and a movable body disposed between the upper and lower shoes and slidingly in contact with the lower surface of the upper shoe and/or the upper part of the lower shoe, A bearing comprising a sliding contact surface formed by integrally disposing a rust-free thin plate-like sliding contact plate on the lower surface of the upper shoe and/or the upper surface of the lower shoe that slides on the movable body, A contact plate is embedded and fixed at a predetermined interval on the lower surface of the upper shoe and/or on the upper surface of the lower shoe, and a member to be welded made of the same material as the sliding contact plate is buried and fixed on the upper and lower surfaces at a predetermined interval with one end flush with the surface. A sliding contact plate is welded to a welding member and integrally disposed on the surface, and the sliding contact plate forms a sliding surface.

By adopting the above-mentioned means, the present invention has the following effects.

That is, a thin sliding contact plate is embedded in the upper shoe and/or the lower shoe, and a member to be welded made of the same material as the sliding contact plate is buried and fixed in the lower surface of the upper shoe and/or the upper surface of the lower shoe, and the sliding contact plate is fixed to the lower surface of the upper shoe and/or the upper surface of the lower shoe. By welding the contact plates to form a sliding contact surface, the same materials are welded together, so no change in composition occurs in the welded area, and rust can be prevented over the long term.

Further, since rust is prevented from forming, the upper shoe and/or the lower shoe are in good sliding contact with the movable body, so that the function of the support can be fully demonstrated. Furthermore, since welding is performed between similar materials, the strength of the joint increases. Furthermore, it has the effect of being able to obtain a smooth sliding surface.

In addition, the movable body of the support in the present invention refers to a support plate and a flat sliding plate with one side flat and the other side spherical or curved, and these are attached to the upper surface of the lower shoe directly or through an intermediate member. By being placed at the same position, the shoe comes into sliding contact with the upper shoe and/or the lower shoe. Usually, the support plate is placed directly on the upper surface of the lower shoe, and support using this support plate is called a support plate support. In addition, the sliding plate may be fitted onto the upper surface of the lower shoe indirectly by fitting into an intermediate member combined with the rubber elastic body, or directly on the upper surface of the lower shoe (in such a case, the lower shoe may be connected to the rubber elastic body and the reinforcing material). The former bearing using the sliding plate is called a sealed rubber bearing, and the latter bearing is called a rubber bearing.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, as an example figure, a support plate support will be illustrated and explained.

10 is an upper shoe fixed to an upper structure G such as a bridge girder by anchor bolts 11...11, 12 is a lower shoe fixed to a lower structure B such as a bridge girder by anchor bolts 13...13, and 14 is an upper shoe. 10 bottom side 1
The sliding contact plate 14 is usually made of stainless steel.

16 is a member to be welded for integrally disposing the sliding contact plate 14 on the lower surface 15 of the upper shoe; the welding member 16 is made of the same material as the sliding contact plate 14, and is buried in the lower surface 15 at a constant interval. Fixed.

17 is a sliding surface formed by the sliding contact plate 14; 18 is a movable body disposed on the upper surface of the lower shoe 12 and in sliding contact with the sliding surface 17; one surface of the movable body 18 is formed on the lower shoe 12; It consists of a support plate having a convex spherical surface that matches the concave spherical surface and a flat surface that matches the sliding surface 17 on the other side.

Next, in Figures 5 and 6, the upper shoe 1
0 and the sliding contact plate 14 will be described in detail.

That is, in the method shown in FIG. 5, a plurality of holes 19 are provided at regular intervals on the lower surface 15 of the upper shoe, and a cylindrical member to be welded 16 is press-fitted or screwed into the holes 19, so that one end is attached to the lower surface. 15. Embed and fix it so that it is on the same surface as 15. Next, a sliding contact plate 14 with a hole 20 smaller than the diameter of the welded member 16 is arranged on the lower surface 15 at a position that matches the welded member 16, and the sliding contact plate 14 is inserted so that the hole 20 portion is formed. By holding it and welding it to the member to be welded 16, it is integrated with the upper shoe 10 to form a sliding surface 17.

In addition, the method shown in FIG. 6 provides a plurality of concave or dovetail-shaped grooves 21 at regular intervals on the lower surface 15 of the upper shoe, and inserts a welded member 16 having the same shape as the groove 21 in the grooves 21, with one end facing downward. 15 so that it is press-fitted and buried and fixed. Then, the lower surface 1
The upper shoe 10 is formed by arranging strip-shaped sliding contact plates 14 in parallel on the top of the welding member 16 and welding the adjacent sliding contact plates 14 and the welding member 16. The sliding contact surface 17 is formed by integrating with the sliding contact surface 17.

In addition, although this embodiment illustrated a mode in which the thin sliding contact plate 14 is integrally arranged on the upper shoe 10 of the base plate support,
The same method can be applied to the upper surface of the lower shoe 12, and can also be applied to the sealed rubber support and the rubber support in which the movable body 18 and the upper shoe 10 are in sliding contact with each other.

[Brief explanation of the drawing]

Figure 1 is a partially longitudinal front view showing a conventional bearing;
Figures 2 and 3 are perspective views showing the upper shoe of a conventional bearing, Figure 4 is a partially longitudinal front view showing the bearing of the present invention, and Figures 5 and 6 are views of the bearing of the present invention. It is a perspective view showing an upper shoe. 10: upper shoe, 12: lower shoe, 14: thin sliding contact plate, 15: lower surface, 16: member to be welded, 17: sliding surface, 18: movable body.

Claims (1)

[Scope of utility model registration request] The movable body consists of an upper shoe fixed to the upper structure, a lower shoe fixed or placed on the lower structure, and a movable body disposed between the upper and lower shoes and slidingly in contact with the lower surface of the upper shoe and/or the upper part of the lower shoe. A bearing in which a non-corrosive thin plate-like sliding contact plate is integrally arranged on the lower surface of the upper shoe and/or the upper surface of the lower shoe to form a sliding contact surface, the thin plate-like sliding contact plate being in sliding contact with the body. A member to be welded made of the same material as the sliding contact plate is buried and fixed at a predetermined interval on the lower surface of the upper shoe and/or the upper surface of the lower shoe, with one end flush with the surface, and the member to be welded is fixed to the lower surface of the upper shoe and/or the upper surface of the lower shoe. A bearing characterized in that a sliding contact plate is welded to and integrally arranged on the surface, and the sliding contact plate forms a sliding surface.