JPS64414Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to an elastic support for structures that elastically and movably supports bridge girders and other structures. Conventionally, elastic supports for structures with a flat pressure-receiving surface have a structure in which a steel elongation suppressing material with a wide area through hole is embedded in a circular or square plate-shaped rubber layer. Are known. In the case of an elastic support with this structure, the rubber layers on both the upper and lower sides of the steel elongation suppressor are continuously integrated at the wide-area through hole in the steel elongation suppressor, so the elastic support It has the advantage of improving the integrity of the However, in the elastic support with this structure,
The overall thickness of the rubber layer is different between the parts with and without the steel elongation suppressor, so the spring constant is large in parts where the rubber layer is thin, and the spring constant is large in parts where the rubber layer is thick. As the constant becomes smaller, a difference in spring constant occurs in the elastic bearing, and when the load of the structure acts on the elastic bearing, the part of the rubber layer with a large spring constant absorbs the load more than the part with a small spring constant. You will have to bear the burden. In addition, as the area of the portion of the rubber layer with a large spring constant becomes smaller than the area of the portion with a small spring constant, the load bearing rate of the portion with a large spring constant increases, and when the load bearing rate exceeds a certain limit, Problems arise in that excessive compressive stress acts on the rubber material and that the rubber material ages prematurely. In the case of steel elongation suppressing materials, which are made by connecting multiple annular bodies arranged on the same plane and connected by bending a steel bar and joining the ends by welding, the pressure receiving area is extremely small, and the through holes are The aforementioned problems are particularly exacerbated by the fact that the area of The object of the present invention is to provide an elastic support for a structure that advantageously solves the above-mentioned problems. The invention will now be explained in detail by way of illustrated examples. In the case of the first embodiment of the present invention shown in FIGS. 1 and 2, a large-diameter toric body 1 is constructed by bending a steel rod with a circular cross section into a large circle and joining the ends by welding. , and a steel rod with a circular cross section is bent into a small circle and the ends are joined by welding to form a small diameter torus 2, and a large number of small diameter toruses 2 are arranged within the large diameter torus 1. They are fitted side by side so as to be located on the same plane, and the adjacent small-diameter toric bodies 2 are connected to each other by welding, and the large-diameter toric body 1 and the adjacent small-diameter toric body 2 are connected by welding. The large-diameter toric body 1 and the large number of small-diameter toric bodies 2 fitted therein and connected to each other constitute a toroidal combination type steel intermediate elongation suppressing material 3. Further, large-diameter circular through holes are concentrically provided in a steel plate having a circular outer periphery to constitute an annular steel pressure-receiving surface elongation suppressing material 4. Steel pressure-receiving surface side elongation suppressing materials 4 are arranged at intervals on both the front and back sides (both upper and lower sides) of the steel intermediate elongation suppressing material 3, and inside each small-diameter toric body 2 in the steel intermediate elongation suppressing material 3. A hard rubber material 5 is filled in the vertical through hole between this and the large-diameter toric body 1, and a hard rubber material 6 is filled in the vertical through hole of the steel pressure receiving surface side elongation suppressing material 4. , Furthermore, between the plate-like part made of the intermediate elongation suppressing material 3 and the hard rubber material 5 and the plate-like part consisting of the pressure-receiving side elongation suppressing material 4 and the hard rubber 6, from each elongation suppressing material 3, 4 is provided. A thick soft rubber material 7 is interposed therebetween, and a soft rubber coating 8 having a thickness of about 1 to 2 mm is polymerized on the outside of the plate-shaped portion consisting of the pressure-receiving side elongation suppressing material 4 and the hard rubber material 6. The hard rubber materials 5 and 6, the soft rubber 7, and the soft rubber coating 8 are integrally bonded by vulcanization treatment (pressure heating), and the intermediate elongation suppressing material 3, the pressure-receiving side elongation suppressing material 4, and each of the above-mentioned The hard rubber material, soft rubber material, and soft rubber coating are bonded together during vulcanization. Further, the outer peripheral surfaces of the intermediate elongation suppressing material 3 and the pressure-receiving side elongation suppressing material 4 are covered with a soft rubber material, and the upper and lower pressure-receiving surfaces of the elastic support are flat. The hard rubber materials 5 and 6 have a hardness of, for example, 80 to
A material having a hardness of 90 degrees is used, and a material having a hardness of 50 to 70 degrees is used as the soft rubber material 7 and the soft rubber coating 8. Next, Table 1 shows examples of combinations of hardness of each rubber material.

【table】

[Table] In the case of the second embodiment of the present invention shown in FIG. 3, the shape of the elastic support is a quadrilateral with arcuate corners, and the steel intermediate elongation suppressor 3 has arcuate corners. It is composed of a four-sided ring body 9 made of a steel rod with a circular cross section and a large number of small-diameter toric bodies 2 fitted therein and joined together by welding, and has an arcuate corner part as a steel pressure-receiving surface side elongation suppressing material 4. Although a square annular steel plate having the same structure is used, the other structure is the same as that of the first embodiment. In the case of the third embodiment of the present invention shown in FIGS. 4 and 5, annular steel plates are used as the steel intermediate elongation suppressing material 3 and the steel pressure-receiving surface side elongation suppressing material 4, but other The configuration is similar to that of the first embodiment. In the case of the fourth embodiment of the present invention shown in FIG. Although an annular steel plate having a circular through hole with a diameter is used, the other configurations are the same as in the first embodiment. In the case of the fifth embodiment of the present invention shown in FIG. 7, a plurality of large-diameter toric bodies 1A and 1B are formed by bending a steel rod having a circular cross section into a large circle and joining the ends by welding.
are arranged so as to overlap in the diametrical direction of the toroids, and the large-diameter toric bodies 1A and 1B are partially welded together at intervals in the circumferential direction, so that a steel intermediate elongated structure having no small-diameter toric bodies is formed. Although the suppressing material 3 is configured,
The other configurations are the same as in the first embodiment. In the case of the sixth embodiment of the present invention shown in FIG. 8, a plurality of intermediate elongation suppressing members 3 made of steel made of circular or square annular steel plates are arranged in the thickness direction of the elastic support at an intermediate portion in the thickness direction of the elastic support. Although they are buried at intervals in the horizontal direction, the other configuration is the same as that of the first embodiment. According to the present invention, in an elastic support for a structure in which a steel elongation suppressing material having a through hole is embedded in a rubber layer, the rubber material filled in the through hole of the steel elongation suppressing material is Since it is a hard rubber material and the rubber material in other parts is a soft rubber material, the difference in spring constant between the part of the rubber layer that overlaps with the steel elongation suppressing material and other parts can be significantly reduced. When a structural load is applied to the elastic support, excessive compressive stress can be prevented from acting on a part of the rubber layer, and furthermore, premature aging of the rubber material due to excessive compressive stress can be prevented. Moreover, since the material filled in the wide-area through-hole in the steel elongation suppressor is a rubber material and can be integrally molded with the rubber materials on both sides of the steel elongation suppressor, it has strong integrity. Moreover, effects such as being able to provide an elastic support with a small difference in compressive stress can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of an elastic support for a structure according to a first embodiment of the present invention, and FIG. 2 is an A-A thereof.
3 is a partially cutaway plan view of an elastic support for structures according to a second embodiment of the present invention, and FIG. 4 is an enlarged line sectional view of an elastic support for structures according to a third embodiment of the present invention. FIG. 5 is an enlarged sectional view taken along the line B-B, FIG. 6 is a partially cutaway plan view of the elastic support for structures according to the fourth embodiment of the present invention, and FIG. FIG. 8 is a longitudinal sectional front view of an elastic support for structures according to a sixth embodiment of the present invention. FIG. 1 is a large-diameter toric body, 2 is a small-diameter toric body, 3 is a steel intermediate elongation suppressing material, 4 is a steel pressure-receiving surface side elongation suppressing material,
5 and 6 are hard rubber materials, 7 is a soft rubber material, and 8 is a soft rubber coating.

Claims (1)

[Scope of utility model registration request] In an elastic support for a structure in which a steel elongation suppressing material having a through hole is embedded in a rubber layer, the rubber material filled in the through hole of the steel elongation suppressing material is a hard rubber material, and An elastic support for a structure, characterized in that the rubber material of the other parts is a soft rubber material.