JPH07158018A - Mounting position matching method supported by rubber - Google Patents

Abstract

PURPOSE:To make a bearing material compact without using any lower shoe, to keep the total height of the bearing from becoming high and to reduce the weight of the total bearing and the manufacturing cost. CONSTITUTION:With regard to a bridge having a base plate 5, which has its upper surface made a sliding surface, secured to the upper surface of a bridge pier 8, the bottom surface of a rubber support 3 equipped with a lower metal plate placed on the sliding surface of the base plate, and the upper surface of the upper metal plate of the rubber support 3 fixed to the bottom surface of a bridge stringer 7, a moving jig 20 is fitted on a lower metal plate of the rubber support 3 and a reaction force transmission bar is extended through a tapped hole and the like provided on the longitudinal side of the moving jig. An expansion/contraction device 10, which is mounted through a fixed part 13 of the reaction supporting part mounted on the end and the surface of the bridge pier, is connected to the reaction transmission bar 12 which makes the device 10 expand and contract. Thus shearing deformation caught on the rubber support 3 is corrected by sliding the lower metal plate of the rubber support 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber bearing interposed between a lower structure such as a bridge pier and an upper structure such as a bridge girder,
More specifically, the present invention relates to a rubber bearing mounting position adjusting method for correcting a shear deformation strain applied to a rubber bearing.

[0002]

2. Description of the Related Art Generally, a bridge is first constructed by first forming a bridge pier, installing a rubber bearing on the upper surface of the bridge pier, and then forming a bridge girder on the upper surface of the rubber bearing. However, since the bridge girder expands and contracts depending on the outside temperature, despite the position that the positional relationship between the pier and the bridge girder was originally set,
When the bridge girder is completed, the rubber bearing may shift and shear deformation strain may be applied. Therefore, in order to eliminate this shear deformation strain, a step of shifting the rubber bearing to correct it in a predetermined position may be required.

Conventionally, as a method of correcting the shear deformation strain applied to the rubber bearing, as shown in FIG. 3, a base plate having an upper surface of the base plate as a sliding surface is used as an upper surface of the pier. The lower surface of the lower metal plate and the upper surface of the lower shoe of the rubber bearing having the upper metal plate and the lower metal plate are fixed to each other, and the upper surface of the base plate and the lower surface of the lower shoe contact each other. It has a screw hole tap for movement on the side surface of the lower shoe, and the reaction force transmission rod is extended through this screw hole tap for movement to support the reaction force attached to the end of the pier. Attach the expansion device via the fixed part of the section, connect the reaction force transmission rod and the expansion device, and expand and contract the expansion device so that the lower shoe slides on the base plate so that the position of the rubber bearing is fixed. Adjust and after the adjustment is completed, bolt the bottom shoe and the base plate or It was fixed by contact or the like.

Here, the side surface of the lower shoe is provided with a screw hole tap (not shown) for movement, but the thickness of the lower shoe may be determined in proportion to the diameter of the screw hole tap. In some cases, depending on the thickness of the lower shoe, the height of the entire bearing may become unnecessarily high. Further, since it is necessary to interpose a lower shoe between the rubber bearing main body and the base plate, the cost is increased accordingly.

[0005]

According to the present invention, a lower shoe is not particularly interposed between the base plate and the lower metal plate of the rubber support, and the upper surface of the base plate and the rubber support are not provided. By directly contacting the lower surface of the lower metal plate with the lower metal plate of the rubber bearing and moving the lower metal plate of the rubber bearing using a dedicated moving jig, the shear deformation strain applied to the rubber bearing is removed. Further, since the present invention does not use the lower shoe, various problems caused by the lower shoe can be prevented, for example, the height of the entire bearing can be prevented from increasing, and the entire bearing can be made compact, and
The weight of the entire bearing can be reduced, and the cost can be reduced by not using the lower gear parts.

[0006]

In order to achieve the above object, the present invention adopts the following constitution. That is, a base plate having the upper surface of the base plate as the sliding surface is fixed to the upper surface of the pier, and the lower surface of the rubber bearing provided with the lower metal plate is placed on the sliding surface of the base plate. In the bridge where the upper surface of the upper metal plate of the rubber bearing is fixed to the lower surface of the bridge girder, the moving jig is attached to the lower metal plate of the rubber bearing, and it is provided on the side surface in the length direction of the moving jig. Extend the reaction force transmission rod through a screw hole tap, etc., and attach the expansion device via the fixed part of the reaction force support part attached to the end of the pier and the bridge pier surface, and connect the reaction force transmission rod and the expansion device. Then, by expanding and contracting the expansion / contraction device, the lower metal plate of the rubber bearing is slid to correct the shear deformation strain applied to the rubber bearing.

[0007]

Since the present invention has the above-mentioned structure, in the present invention, in particular, a lower shoe is provided which is interposed between the upper surface of the base plate and the lower surface of the lower metal plate of the rubber bearing. Without
The upper surface of the base plate and the lower surface of the lower metal plate of the rubber support material are in direct contact with each other.As a method of removing the shear deformation strain applied to the rubber support, use a special moving jig. It is what makes me. Therefore, since the lower shoe is not used in the present invention, various problems caused by the lower shoe can be prevented, for example, the height of the entire bearing can be prevented from increasing, and the entire bearing can be made compact and the weight of the entire bearing can be reduced. This can be done, and the cost can be reduced by not using the lower parts.

[0008]

1 is a sectional view of an embodiment according to the present invention. The base plate 5 has a sliding surface 6 on the upper surface,
The base plate 5 is fixed to the upper surface of the pier 8, and the lower surface of the lower metal plate 2 of the rubber bearing 3 having the upper metal plate 1 and the lower metal plate 2 is placed on the sliding surface 6 of the base plate 5. Is a bridge in which the upper surface of the upper metal plate 1 of the rubber bearing 3 is fixed to the lower surface of the bridge girder 7. The lower metal plate 2 of the rubber bearing 3 is provided with a moving jig 20 having front and rear engaging projections 22 and 23 on both ends of the rod 21. It has a size such that it can be mounted so as to fit with the partial engagement projection 22 and the rear engagement projection 23.
A screw hole tap 25 is provided on the side surface of the moving jig 20, and the rod 21 is fixed to the lower metal plate 2 of the rubber bearing 3 with screws or the like (not shown) using the fixing screw holes 24, 24. , The reaction force transmission rod 12 is connected with a screw to the screw hole tap 25 on the side surface in the length direction of the moving jig 20 and extended, and attached to the fixed portion 13 of the reaction force support portion attached to the end of the pier 8. It is connected to the jack 10 and is expanded and contracted so that the lower metal plate 2 of the rubber bearing 3 is displaced to correct the shear deformation force applied to the rubber bearing 3 so that the rubber bearing 3 The mounting position is adjusted.

After the shear deformation strain applied to the rubber support 3 is corrected by shifting the lower metal plate 2 of the rubber support 3, the lower metal plate 2 and the base plate 5 are fixed with bolts or welding ( (Not shown) and used to displace the lower metal plate 2 of the rubber bearing 3, the reaction jig 20, the reaction force transmission rod 12, the reaction force support fixing portion 13, and the jack 1.
0 is removed to complete the rubber bearing mounting position alignment work. The rubber bearing 3 used here is generally a laminated rubber in which rubber and metal plates are alternately arranged and integrated.

FIG. 2 is a perspective view of the moving jig 20 used in FIG. The moving jig 20 has a front engaging protrusion 22 and a rear engaging protrusion 23 at both ends of a rod 21,
Has fixing screw holes 24, 24, and has a screw hole tap 25 on the side surface in the length direction of the moving jig 20. The lower metal plate 2 of the rubber bearing 3 has a rod 21, a front engaging portion. The protrusion 22 and the rear engagement protrusion 23 are dimensioned to fit together. The fixing screw holes 24, 24 are mounting holes for bolts used when fixing the rod 21 to the lower metal plate 2 of the rubber bearing 3.
The screw hole tap 25 is for mounting the reaction force transmission rod 12.

[0011]

By having the above-mentioned structure,
According to the present invention, the upper surface of the base plate and the lower surface of the lower metal plate of the rubber bearing are directly connected to each other without interposing a lower shoe between the base plate and the lower metal plate of the rubber bearing. The lower metal plate of the rubber bearing is moved by using a dedicated moving jig to remove the shear deformation strain applied to the rubber bearing. Therefore, in the present invention, since the lower shoe is not used, it is possible to prevent various problems caused by the lower shoe, for example, to prevent the height of the entire bearing from becoming high, and to make the entire bearing compact and to reduce the weight of the entire bearing. The cost can be reduced and the cost can be reduced by not using the lower parts.

[0012]

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a rubber bearing mounting position alignment method of the present invention.

FIG. 2 is a perspective view of the moving jig used in FIG.

FIG. 3 is a cross-sectional view of a conventional rubber bearing mounting position alignment method.

[Explanation of symbols]

 1 ... ・ Upper metal plate 2 ・ ・ ・ ・ ・ ・ Lower metal plate 3 ・ ・ ・ ・ Rubber bearing 5 ・ ・ ・ ・ Base plate 6 ・ ・ ・ ・ ・ ・ Sliding surface 7 ・ ・ ・ ・ ・ ・ Bridge girder 8 ・ ・ ・・ Bridge pier 10 ... Expansion device or jack 12 ... Reaction force transmission rod 13 ... Fixed portion of reaction force support portion 20 ... Migration jig 21 ... Rod body 22 ... Front engagement Protrusion 23 ... Rear engaging protrusion 24 ... Fixing screw hole 25 ... Screw hole tap 30 ... Lower shoe 31 ... Lower shoe screw hole tap

Claims (1)

[Claims] 1. A base plate having an upper surface of the base plate as a sliding surface is fixed to an upper surface of a pier, and a lower surface of a rubber bearing having a lower metal plate is attached to a sliding surface of the base plate. On a bridge with the upper surface of the upper metal plate of the rubber bearing fixed to the lower surface of the bridge girder, mount the moving jig on the lower metal plate of the rubber bearing, and set the side surface in the length direction of the moving jig. Extend the reaction force transmission rod through the taps on the screw holes, etc., and attach the expansion / contraction device via the fixed part of the reaction force support part attached to the end of the pier and the bridge pier surface. A method for aligning the mounting position of a rubber bearing, characterized in that the lower metal plate of the rubber bearing is slid to correct the shear deformation strain applied to the rubber bearing by connecting and to expand and contract the expansion device.