JPH1171719A - Temporary fixed block for rubbery elastic support body, and method for mounting and demounting the temporary fixed block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporary fixed block and a method for mounting and demounting the temporary fixed block to simplify a work to mount and demount the temporary fixed block and cope with a high reaction force, and further facilitate a site work through simple structure. SOLUTION: A temporary fixed block 1 comprises a first block 9 wherein a liner block 6 having taper bearing pressure surfaces 6a and 6b formed on both sides in a longitudinal direction and a coupling block 8 having a screw hole 7 formed in parallel to the taper bearing pressure surfaces 6a and 6b are integrally formed; and a second block 13 wherein a liner block 10 having Teflon-processed taper bearing pressure surface 10a making contact with the taper bearing pressure surface 6a and 6b of the liner block 6 and a coupling block 12 having a screw hole 11 formed in parallel to the taper bearing pressure surfaces 10a and 10b are integrally formed. Further, the temporary fixed block comprises a fastening means 14, such as a fastening bolt, being removably fastened through the screw hole 11 with the taper bearing pressure surfaces 6a and 10a brought into contact with end faces 8a and 12a of the coupling blocks 8 and 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary fixing block for a rubber-like elastic bearing and an attachment of the temporary fixing block.
Related to the removal method, more specifically, the structure of a temporary fixing block interposed between the side surface of the side block of the rubber-like elastic bearing member and the upper plate side of the rubber-like elastic bearing member subjected to pre-shearing deformation, and the temporary fixing thereof The present invention relates to a temporary fixing block of a rubber-like elastic bearing body to which a block can be easily attached or detached, and a method of attaching and detaching the temporary fixing block.

[0002]

2. Description of the Related Art Conventionally, rubber-like elastic bearings have been installed between an upper structure such as a bridge girder and a lower support structure such as an abutment or a pier, so that vibration energy from the upper structure, rolling, and upper vibration can be obtained. It is configured to absorb and relax the expansion and contraction of the structure. However, the rubber-like elastic bearings move horizontally in the longitudinal direction of the structure due to expansion and contraction due to temperature changes of the upper structure, drying shrinkage and creep of the concrete structure, and shear deformation is applied to the rubber-like elastic bearings. Conventionally, the pre-shearing deformation corresponding to the amount of deformation such as drying shrinkage and creep of the concrete structure is applied to the rubber-like elastic bearing in advance so as to adversely affect the construction of the upper structure. Pre-shear holding devices adapted to be applied in the opposite direction are known.

[0003]

Incidentally, as a conventional preliminary shear holding device, for example, Japanese Patent Application No. Hei 8-22610 is disclosed.
As disclosed in No. 6, both ends of one side block of the rubber bearing body and a flat bearing provided on one side in the bridge axis direction of the upper and lower shoes opposed to the one side. A rubber bearing body preliminarily sheared and deformed by a screw bolt at both ends and a taper liner can be pressed and supported with a screw bolt interposed.

[0004] The pre-shear deformed rubber bearing body is kept deformed by tightening the screw bolts at both ends, and the pre-shear holding device is removed after the concrete structure is cured. After releasing the tension of the screw bolts at both ends, the nut is loosened to release the preliminary shearing. However, such a conventional pre-shearing device has a structure in which the reaction force of the rubber bearing is received by the screw bolts at both ends, so that the strength is small, it is difficult to cope with a large reaction force, and it is difficult to cope with a screw hole or the like. There is a problem that a lot of labor and time are required for the processing, and it is not possible to perform the on-site work efficiently.

The present invention has been devised in view of such a conventional problem, and can easily perform the work of attaching and detaching the temporary fixing block, and can cope with a large reaction force. It is an object of the present invention to provide a temporary fixing block of a rubber-like elastic bearing body and a method of attaching and detaching the temporary fixing block, which can be easily performed on site with a simple structure.

[0006]

In order to achieve the above object, a temporary fixing block according to the present invention is fixed to a lower plate of a rubber-like elastic support while a pre-shearing deformation is applied to the rubber-like elastic support. A temporary fixing block interposed between a side surface of the side block and a side surface of a concave portion formed on an upper plate of the rubber-like elastic support body, which is opposed to the side surface, wherein the temporary fixing block has a tapered shape. A first block formed integrally with a liner block having a bearing surface formed on a side surface and a connection block having a screw hole formed in parallel with the tapered bearing surface; and a taper bearing surface of a liner block of the first block. A second block formed integrally with a liner block having a tapered bearing surface to be in contact with and a connecting block having a screw hole formed in parallel with the tapered bearing surface; In lock and being in contact with end faces of the tapered Bearing surfaces and the connecting block of the second block is for the subject matter in that it consists of a fastening means for detachably fastening through screw holes.

Further, the method of mounting and removing the temporary fixing block according to the present invention is characterized in that the taper bearing surfaces of the first block and the second block and the end surfaces of the respective connecting blocks are brought into contact with each other to fasten the screw holes to the screw holes. The temporary fixing block into which is screwed is interposed between the side surface of the side block of the rubber-like elastic bearing member subjected to the preliminary shearing deformation and the side surface of the upper plate of the rubber-like elastic bearing member, and the fastening means is provided. The temporary fixing block is attached by rotating the first block and the second block so that the respective tapered bearing surfaces move in a direction of pressing against each other, and the fastening means is separated from each other by the tapered bearing surfaces of the first block and the second block. The gist is to remove the temporary fixing block by rotating so as to move in the direction.

As described above, in the present invention, the temporary fixing block is attached by rotating the fastening means so as to move the respective taper bearing surfaces of the first block and the second block in pressure contact with each other. The temporary fixing block can be removed by rotating the fastening means so as to move the respective taper bearing surfaces of the first block and the second block away from each other. As a result, the work of attaching and detaching the temporary fixing block is simplified. In addition to being able to cope with a large reaction force, on-site work can be easily performed with a simple structure.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a temporary fixing block 1 embodying the present invention, FIG. 2 is a plan view of the temporary fixing block 1 assembled to a rubber-like elastic support 2, and FIG.
2 shows a front view of FIG. 2, and FIG. 4 shows a side view of FIG.

The temporary fixing block 1 is provided with a pre-shearing deformation corresponding to the amount of deformation such as drying shrinkage or creep of a concrete structure, applied to the rubber-like elastic support 2. A side surface of the side block 4 fixed to the lower plate 3 and a side surface 5 of a concave portion formed in the upper plate 5 of the rubber-like elastic bearing member 2 facing the side surface.
a.

The temporary fixing block 1 has a liner block 6 having tapered bearing surfaces 6a and 6b formed on Teflon on both longitudinal sides, and a screw hole 7 formed parallel to the tapered bearing surfaces 6a and 6b. A first block 9 integrally formed with a block 8;
A liner block 10 having a Teflon-coated tapered pressure bearing surface 10a that comes into contact with the tapered pressure bearing surfaces 6a and 6b of the liner block 6;
A second block 13 formed integrally with a connecting block 12 formed in parallel with the first and second blocks 0a and 10b;
Each taper bearing surface 6 of the block 9 and the second block 13
a, 10a and end faces 8a, 1 of the respective connecting blocks 8, 12
A fastening means 14 such as a tightening bolt for detachably fastening through the screw hole 11 in a state where the 2a is in contact with the fastening means 14a.

At first, the temporary fixing block 1 constructed as described above is assembled to the rubber-like elastic bearing member 2 by first attaching the tapered pressure bearing surfaces 6a, 10a of the first block 9 and the second block 13.
In a state where the end faces 8a, 12a of the connection blocks 8, 12 are in contact with each other, the fastening means 14, such as a fastening bolt, is screwed into the screw holes 7, 11. As shown in FIGS. 3 to 7, the concrete upper structure 15 is attached to the rubber-like elastic bearing body 2 installed between the upper structure 15 such as a bridge girder and the lower support structure 16 such as an abutment or a pier. The temporary fixing block 1 is attached to a side block of the rubber-like elastic support 2 in a state where a pre-shearing deformation of an amount corresponding to a deformation amount such as drying shrinkage and creep of the upper structure 15 is given in a direction opposite to the deformation direction of the upper structure 15. 4
Of the upper plate 5 of the rubber-like elastic support 2
a.

At this time, the temporary fixing block 1 is prevented from dropping by the stopper plate 17 and the fixing bolt 18 as shown in FIGS. After the assembly of the temporary fixing block 1 to the rubber-like elastic bearing body 2 is completed in this way, the fastening means 14 is attached to substantially the entire surface of each of the taper bearing surfaces 6a and 10a of the first block 9 and the second block 13. The temporary fixing block 1 is attached by being rotated so as to move in the direction of pressing against each other, that is, in the direction of arrow X in FIG.

Further, the fastening means 14 is rotated so as to move the taper bearing surfaces 6a and 10a of the first block 9 and the second block 13 away from each other, that is, to move the fastening means 14 in the direction of the arrow Y, thereby temporarily fixing the block. 1 can be removed from the rubber-like elastic support 2. in this way,
The temporary fixing block 1 is attached by connecting the fastening means 14 to each of the taper bearing surfaces 6 a, 1 of the first block 9 and the second block 13.
0a are rotated so as to move in a direction in which the first blocks 9a are pressed against each other.
The temporary fixed block 1 can be removed by rotating the tapered bearing surfaces 6a and 10a of the second block 13 so as to move the tapered bearing surfaces 6a and 10a away from each other. As a result, the work of mounting and removing the temporary fixed block 1 is simplified. In addition to being able to carry out a large reaction force, it is possible to cope with a large reaction force, and it is also possible to easily perform on-site work with a simple structure.

[0015]

According to the present invention, the temporary fixing block, which is divided into a plurality of parts as described above, is formed on the side surface of the side block fixed to the lower plate of the rubber-like elastic support and the upper plate. Interposed between the side of the recess,
Since the action force is retained by the compressive force of the members, the work of attaching and detaching the temporary fixing block can be easily performed, and also the on-site work can be easily performed. It can cope with a large reaction force, and has an effect that it can be manufactured at low cost because the structure is simple and the processing is not complicated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a temporary fixing block embodying the present invention.

FIG. 2 is a plan view showing a state in which a temporary fixing block is attached to a rubber-like elastic bearing body.

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a side view of FIG. 2;

FIG. 5 is a half sectional view in a direction perpendicular to a bridge axis in which a temporary fixing block is assembled to a rubber-like elastic bearing body.

FIG. 6 is a half-sectional view in the bridge axis direction in which a temporary fixing block is assembled to a rubber-like elastic bearing body.

FIG. 7 is an enlarged plan view of a portion A in FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Temporary fixing block 2 Rubber-like elastic bearing 3 Lower plate 4 Side block 5 Upper plate 5a Side surface 6 Liner block 6a, 6b Taper bearing surface 7 Screw hole 8 Connection block 9 First block 10 Liner block 10a, 10b Taper bearing surface 11 Screw hole 12 Connection block 13 Second block 14 Fastening means 15 Upper structure 16 Lower support structure 17 Stopper plate 19 Fixing bolt

Claims (2)

[Claims] 1. A side face of a side block fixed to a lower plate of a rubber-like elastic bearing body in a state where a pre-shearing deformation is given to the rubber-like elastic bearing body; A temporary fixing block interposed between a side surface of a concave portion formed in an upper plate of the body, wherein the temporary fixing block has a liner block having a tapered bearing surface formed on a side surface and a screw hole parallel to the tapered bearing surface. A first block formed integrally with a connecting block formed in the first block, a liner block having a tapered bearing surface that comes into contact with a tapered bearing surface of the liner block of the first block, and a threaded hole formed with the tapered bearing surface. A second block formed integrally with a connecting block formed in parallel with each other; and a taper bearing surface of each of the first block and the second block and an end face of each connecting block. In a state of being contact, temporarily fixed block of rubber-like elastic support member comprising a fastening means for detachably fastening through screw holes. 2. A temporary fixing block in which a fastening means is screwed into a screw hole in a state where the respective taper bearing surfaces of the first block and the second block and the end surface of each connecting block are in contact with each other. The side surface of the side block of the rubber-like elastic bearing member subjected to shear deformation is interposed between the side surface of the upper plate of the rubber-like elastic bearing member, and the fastening means is connected to each of the taper bearing surfaces of the first block and the second block. Rotate so that it moves in the direction of pressure contact and attach the temporary fixing block,
A method for attaching and detaching a temporary fixing block of a rubber-like elastic bearing body, wherein the fastening means is rotated so that the respective taper bearing surfaces of the first block and the second block move away from each other, and the temporary fixing block is removed.