JPH07238509A - Pre-slide type bridge girder bearing device - Google Patents

Abstract

PURPOSE:To manufacture at a low cost and in simple structure, and subject the whole height of rubber layer to a shear deformation. CONSTITUTION:An upper metal plate 2 fixed with the top of a rubber layer 1 is fixed with a metal-made upper holding plate 4 which is fixed with a bridge girder while an upper slide plate 6 is fixed with the bottom of a lower part metal plate 5 fixed with the bottom of the rubber layer 1. A lower part slide plate 9 is fixed with the top of a metal-made lower part holding plate 8 which is fixed with a lower part structure while the lower part of a rubber layer shear preventative metal fitting 11 is removably fixed with a projecting piece 10 continuously installed to the central part of the lower part metal plate 5 on both sides. The upper part of the rubber layer shear preventative metal fitting 11 is fitted into a recessed part 12 installed on both sides of the upper part metal plate 2 so that a spacer 14 may be interposed between a bearing projection 13 and a projection piece 10 integrally installed on the front and the rear on both sides of the metal-made lower part holding plate 8. The spacer 14 laid out before and behind the projection piece 10 on both sides is put down with a spacer presser metal fitting 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when constructing a structure such as a concrete bridge girder, installs a rubber bearing for a structure bearing by sliding it while preventing shear deformation of a rubber layer in the rubber bearing. The present invention relates to a pre-slide type bridge girder support device to be attached.

[0002]

2. Description of the Related Art Conventionally, when constructing a structure such as a concrete bridge girder, as a method of installing a rubber bearing for a structure bearing by sliding it while preventing shear deformation of a rubber layer in the rubber bearing. The method disclosed in Japanese Patent Publication No. 4-9882 is known.

[0003]

In the case of the above-mentioned conventional slide type bridge girder support device, elongated holes extending in the front-rear direction are provided at the four corners of the movable supporting board, and the left and right sides of each elongated hole are arranged in the left-right direction. Since it is necessary to provide a large number of locking teeth extending to the bottom of the fixed member and engaging teeth at the bottom of the fixed member, the structure is complicated. Since the upper part of the bearing is fitted in the concave part of the upper support plate, the mounting strength of the rubber bearing is weak, and the upper and lower fitting parts of the rubber bearing cannot be sheared. However, there is a drawback that it cannot be sheared.

[0004]

In order to advantageously solve the above-mentioned problems, in the pre-slide type bridge girder bearing device of the present invention, the upper metal plate 2 fixed to the upper surface of the rubber layer 1 is
The upper sliding plate 6 is fixed to the lower surface of the lower metal plate 5 fixed to the lower surface of the rubber layer 1 and fixed to the upper metal holding plate 4 fixed to the bridge girder 3, and fixed to the lower structure 7. A lower slide plate 9 is fixed to the upper surface of the metal lower holding plate 8, and projecting pieces 10 are continuously provided on the left and right central portions of the lower metal plate 5.
, The lower part of the rubber layer shearing preventive metal 11 is detachably fixed, and the upper part of the rubber layer shearing preventive metal 11 is fitted into the recesses 12 provided on the left and right sides of the upper metal plate 2, and the metal lower part A spacer 14 is interposed between the supporting protrusions 13 integrally provided on the front and rear portions on both the left and right sides of the holding plate 8 and the projecting piece 10, and the spacers 14 arranged on both front and rear sides of the projecting piece 10 are attached. , It is held down by the spacer holding fitting 15.

[0005]

1 to 4 show a pre-sliding type bridge girder support device according to an embodiment of the present invention, in which lower end portions of a plurality of anchor members 16 are fixed to an upper portion of a metal upper holding plate 4. , A plurality of bolt insertion holes 17 are provided respectively on the front and rear sides of the upper metal plate 2 made of a steel plate fixed to the upper surface of the rubber layer 1, that is, on both sides in the longitudinal direction of the bridge girder 3, and the bolt insertion holes are formed. Bolt 18 inserted in 17
Is screwed into the female screw hole 19 provided in the metal upper holding plate 4. Further, a recess 12 is provided in the girth width direction of the upper metal plate 2, that is, in the center portion on both left and right sides.

A projecting piece 10 is integrally connected to the central portion on both left and right sides of the lower metal plate 5 fixed to the lower surface of the rubber layer 1, and a plurality of female screw holes 20 are provided in the projecting piece 10. A synthetic resin upper slide plate 6 made of ethylene tetrafluoride is fixed to the lower surface of the lower metal plate 5 with an adhesive, and a plurality of through holes for inserting bolts are formed in the horizontal plate 21 of the L-shaped rubber layer shear prevention fitting 11. 22 is provided, the horizontal plate 21 is placed on the projecting piece 10, and is inserted into the bolt insertion through hole 22 and screwed into the female screw hole 20.
Thus, the vertical plate 24 of the rubber layer shearing prevention fitting 11 fixed to the protruding piece 10 is fitted into the recess 12 of the upper metal plate 2.

Bearing protrusions 13 having flat top surfaces are provided at the four corners of the upper portion of the metal lower holding plate 8, and the male screw portions 2 at the upper end of the anchor member 25 are provided on the bearing protrusions 13.
A female screw hole 27 for screwing 6 is provided, the male screw portion 26 is screwed into the female screw hole 27, and the support projection 13
A lock nut 28 is screwed into the male screw portion 26 protruding from the.

A lower slide plate 9 made of a stainless steel plate is fixed to the upper surface of the metal lower holding plate 8 with an adhesive,
The upper slide plate 6 is placed on the lower slide plate 9, and the protrusion piece 1 is provided at a central portion between the bearing protrusions 13 adjacent in the front-rear direction.
0 is placed.

When the bridge girder 3 is dried and shrunk in the above-mentioned configuration, the rubber layer 1, the upper metal plate 2 and the lower metal plate 5 are integrated to move above the metal lower holding plate 8. Moving. 5 and 6 show that due to the drying shrinkage of the bridge girder 3,
It shows a state in which the movement of the rubber layer 1, the upper metal plate 2, and the lower metal plate 5 has been completed.

Next, as shown in FIGS. 7 and 8, after the rubber layer shearing prevention metal 11 and the bolt 23 are removed, the wide spacer 14A and the narrow spacer 14B are removed.
Is fitted between the projecting piece 10 and the supporting projections 13 on both the front and rear sides thereof, and the horizontal plate 29 of the L-shaped spacer pressing fitting 15 has the upper surface of the projecting piece 10 and the wide spacer 14A and the narrow spacer 14B. Of the L-shaped spacer holding member 15 disposed over the upper surface of the support projection 13 and the upper surface of the support protrusion 13.
The outer surface plate 30 of each of the support projections 1 and the outer end surface of the protruding piece 10
A plurality of bolts that are arranged so as to face the outer end surface of No. 3 and the outer end surfaces of the wide spacers 14A and the narrow spacers 14B and that are inserted into the plurality of bolt insertion through holes 31 provided in the horizontal plate 29. 32 is a female screw hole 20 of the protruding piece 10.
(FIGS. 9 and 10).

Next, as shown in FIGS. 11 and 12, when the bridge girder 3 expands and contracts, the rubber layer 1 undergoes shear deformation and the bridge girder 3
Allow expansion and contraction of.

[0012]

According to the present invention, the upper metal plate 2 fixed to the upper surface of the rubber layer 1 is fixed to the upper metal holding plate 4 fixed to the bridge girder 3 and fixed to the lower surface of the rubber layer 1. The upper slide plate 6 is fixed to the lower surface of the lower metal plate 5 that is formed, and the lower slide plate 9 is fixed to the upper surface of the metal lower holding plate 8 that is fixed to the lower structure 7. The rubber layer shearing prevention metal 11 is attached to the protruding piece 10 that is continuously provided at the center of both left and right sides.
The lower part of the metal layer is detachably fixed, and the upper part of the rubber layer shearing prevention fitting 11 is fitted into the recesses 12 provided on both the left and right sides of the upper metal plate 2, and the left and right front sides of the metal lower holding plate 8 are attached. A spacer 14 is interposed between the support protrusion 13 integrally provided at the rear portion and the rear portion, and the protruding piece 10, and the spacers 14 arranged on both front and rear sides of the protruding piece 10 are pressed by the spacer retainer fittings 15. Therefore, the structure is simple and can be manufactured at low cost. Since the upper metal plate 2 is fixed to the upper surface of the rubber layer 1 and the lower metal plate 5 is fixed to the lower surface of the rubber layer 1, the rubber layer A height of 1 can be effectively used.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a pre-slide type bridge girder support device according to an embodiment of the present invention.

FIG. 2 is a side view showing a pre-sliding type bridge girder support device according to the embodiment of the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a vertical cross-sectional side view showing a state in which an upper slide plate fixed to a lower surface of a lower metal plate is placed on a lower slide plate fixed to an upper surface of a metal lower holding plate.

FIG. 5 is a side view showing a state where the bridge girder support device is pre-slide.

6 is a sectional view taken along line BB of FIG.

FIG. 7 is a side view showing a state in which a wide-width spacer and a narrow-width spacer are fitted with the rubber layer shearing prevention metal fitting removed.

8 is a sectional view taken along line CC of FIG.

FIG. 9 is a partial vertical cross-sectional side view showing a state in which a wide spacer is interposed between the projecting piece and the support projections on both the front and rear sides thereof and is fixed by the spacer retainer.

10 is a cross-sectional view taken along line DD of FIG.

FIG. 11 is a partially longitudinal side view showing a state in which the bridge girder is allowed to expand and contract due to shear deformation of the rubber layer.

12 is a sectional view taken along line EE of FIG.

[Explanation of symbols]

 1 Rubber Layer 2 Upper Metal Plate 3 Bridge Girder 4 Metal Upper Holding Plate 5 Lower Metal Plate 6 Upper Sliding Plate 7 Lower Structure 8 Metal Lower Holding Plate 9 Lower Sliding Plate 10 Projecting Piece 11 Rubber Layer Shear Preventive Metal Fitting 12 Recessed 13 Bearing Protrusion 14A Wide spacer 14B Narrow spacer 15 Spacer retainer 16 Anchor member 17 Bolt insertion through hole 18 Bolt 19 Female screw hole 20 Female screw hole 21 Horizontal plate 22 Bolt insertion through hole 23 Bolt 24 Vertical plate 25 Anchor member 26 Male screw Portion 27 Transparent light for bolt insertion 28 Lock nut 29 Horizontal plate 30 Outer plate 31 Through hole for bolt insertion 32 Bolt

Claims (1)

[Claims] 1. An upper metal plate 2 fixed to an upper surface of a rubber layer 1 is fixed to a metal upper holding plate 4 fixed to a bridge girder 3, and a lower metal plate 5 fixed to a lower surface of the rubber layer 1. An upper slide plate 6 is fixed to the lower surface of the lower metal plate 5, and a lower slide plate 9 is fixed to the upper surface of a metal lower holding plate 8 fixed to the lower structure 7. The lower portion of the rubber layer shearing prevention metal fitting 11 is detachably fixed to the continuous protruding piece 10, and the upper portion of the rubber layer shearing prevention metal fitting 11 is fitted into the recesses 12 provided on the left and right sides of the upper metal plate 2. And the supporting protrusions 13 integrally provided on the front and rear portions on the left and right sides of the metal lower holding plate 8 and the projecting piece 1.
A pre-slide type bridge girder support device in which a spacer 14 is interposed between the spacer 14 and 0, and the spacers 14 arranged on both front and rear sides of the protruding piece 10 are held by a spacer holding fitting 15.