JPH0288807A - Installation of rubber bearing - Google Patents

Abstract

PURPOSE:To make the installation of a rubber bearing easier by a method in which the lower metal plate of rubber bearing is pressed forward to cause the shear deformation of the bearing, a press metal for advancement and a stopper metal are removed, and the upper metal plate is moved to remove the shear deformation. CONSTITUTION:A lower coupling projection 5 is provided to the lower metal plate 4 side of a rubber bearing 3 set on the lower support board 2 on a support structure 1, and an upper coupling projection 7 is integrally provided to the upper metal plate 6 side. A press metal 10 for advancement is detachably fixed to an upper support board 9 on the bearing 3 and a stopper metal 11 coupled with the projection 7 is detachably fixed to the board 2. The plate 4 is pressed forwards through the board 9 and the metal 10 by the contraction of the beam part 8 to cause the shear deformation of the bearing 3. The metal 10 and the stopper 11 are removed, and the plate 6 is moved forwards through the board 9 by the contraction of the beam part 8 to remove shear deformation of the bearing 3. The installation can thus be easily performed.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention enables easy installation of rubber bearings that support girder materials such as bridge girders by reducing the amount of shear deformation of the rubber layer in the rubber bearings. This article relates to a possible method for installing rubber bearings.

(Prior Art) Conventionally, as a means of installing a rubber bearing for supporting a girder material such as a bridge girder, as disclosed in Japanese Patent Application Laid-Open No. 62-45803, the upper part is deviated rearward in the direction of contraction of the girder material. A metal front support member and a metal rear support member are arranged at the front and rear parts of the rubber bearing, which has been subjected to preliminary shear deformation so that the lower part of the rubber bearing is deflected forward, and the rear end of the lower metal plate in the rubber bearing is is engaged with the rear support member, and with the front end of the upper metal plate of the rubber bearing engaged with the front support member, the rear support member and Both ends of the front bearing member are connected, and the rubber bearing is held in a shear deformed state by a preliminary shear deformation holding device consisting of the rear bearing member, front bearing member and connecting member, and then the rubber bearing is held in a shear deformed state by the preliminary shear deformation holding device. The lower metal plate of the rubber bearing held in a preliminary shear deformed state is placed and locked on a lower support plate fixed to the upper part of the support structure, and the lower metal plate of the rubber bearing is placed on the upper metal plate of the rubber bearing. on top of the upper support plate, which is locked with
After the concrete girder material has been constructed and the curing period of the concrete has elapsed, the preliminary shear deformation retaining device is removed along with the rubber bearing, and then the concrete girder material shrinks due to drying shrinkage, creep prestress introduction, etc. A means for installing a rubber bearing is known in which the upper support plate and the upper metal plate of the rubber bearing are moved forward to remove preliminary shearing deformation of the rubber layer in the rubber bearing when the yield of girder material is completed.

(Problems to be Solved by the Invention) However, in the case of the above-mentioned conventional rubber bearing installation means, the rubber bearing is subjected to pre-downward shear deformation in advance in the factory G, and the rubber bearing is held by a pre-shear deformation holding device. It requires the complicated work of maintaining it in a pre-sheared deformed state,
Moreover, the structure is complicated, and a large and expensive pre-shear deformation holding device is required.Furthermore, it is necessary to apply a considerably large shear force to the rubber bearing in order to apply a pre-shear deformation equivalent to the amount of contraction of the girder material. Since the reaction force of this large shear force is borne by the preliminary shear deformation holding device, the conc I
When removing the pre-shear deformation retaining device from the rubber bearing after curing the J-girder material, it requires jacking and
Removal work cannot be performed quickly.

In addition, it is necessary to apply a large preliminary shear deformation to the rubber layer in the rubber bearing, which corresponds to the amount of shrinkage of the girder material.
It becomes necessary to increase the thickness of the rubber layer, which is uneconomical, and furthermore, if a large pre-shear deformation is applied to the rubber bearing before installation, both the upper and lower sides of the rubber bearing tend to curve, so it is necessary to prevent such curvature. Therefore, a complicated means of gripping both the upper and lower surfaces of the rubber bearing with a holding jig is required.

The present invention eliminates the need to perform preliminary shear deformation and preliminary shear deformation holding work at the factory, reduces the amount of shear deformation of the rubber layer in the rubber support from the start of installation to the end of installation, and facilitates the installation work. The purpose of this invention is to provide a method of installing a rubber bearing that can be used.

(Means for Solving the Problems) In order to achieve the above object, in the rubber bearing installation method of the present invention, a rubber bearing placed on a metal lower support plate 2 fixed to the upper part of a support structure 1 is used. A lower engaging protrusion 5 is integrally provided on the side of the lower metal plate 4 in the bearing 3, an upper engaging protrusion 7 is integrally provided on the side of the upper metal plate 6 in the rubber bearing 3, and a lower engaging protrusion 7 is integrally provided on the side of the upper metal plate 6 in the rubber bearing 3. An advancement pressing fitting 10 engaged with the rear portion of the lower engagement protrusion 5 in the contraction direction of the girder member is removably fixed to the metal upper support plate 9 fixedly placed on the rubber support 3, A stopper fitting 11 engaged with the front part of the upper engagement protrusion 7 in the direction of contraction of the beam member.
is removably fixed to the metal lower support plate 2, and then the girder material 8
Due to the contraction of the metal upper support plate 9. Forward press fitting 10
The lower metal plate 4 of the rubber bearing 3 is pressed forward via the lower engagement protrusion 5 to shear and deform the rubber layer 12 of the rubber bearing 3 so that the lower side of the rubber layer 12 is displaced forward. Next, after removing the advancing press fitting 10 and the stopper fitting 11, the upper metal plate 6 of the rubber bearing 3 is moved forward via the metal upper support plate 9 due to contraction of the girder 8, and the rubber bearing 3 is moved forward. Rubber layer 12 in
The shear deformation of is removed.

Further, a metal upper support plate 9 fixed to the lower part of the girder 8 is placed on the rubber support 3 placed on the metal lower support plate 2 fixed to the upper part of the support structure 1, and the rubber support 3, the advancing press fitting 10 detachably fixed to the upper support plate 9 is engaged with the rear part of the lower metal plate 4 in the girder contraction direction, and the front part of the upper metal plate 6 in the rubber support 3 is engaged with the The stopper metal plate 11 detachably fixed to the lower support plate 2 is engaged, and then the lower metal plate 4 of the rubber support 3 is moved forward via the upper support plate 9 and the advancement pressing metal plate 10 due to contraction of the girder 8. Rubber layer 1 in rubber bearing 3 by pressing
2 is shear-deformed so that the lower side of its rubber layer 12 is deviated forward, and then, after removing the advancing press fitting 10 and the stopper fitting 11, the upper support plate 9 is Upper metal plate 6 of rubber bearing 3 through
The above objective can also be achieved by moving the rubber Ji 12 forward and removing the shear deformation of the rubber Ji 12 in the rubber bearing 3.

(Function) The press fitting 10 attached to the upper support plate 9 fixed to the girder 8 is engaged with the lower engagement protrusion 5 of the lower metal plate 4 in the rubber bearing 3 or the rear part of the lower metal plate 4. let me,
And the stopper fitting If attached to the lower support board 2 fixed to the support structure l is engaged with the upper engagement protrusion 7 of the upper metal plate 6 of the rubber bearing 3 or the front part of the upper metal plate 6. When the beam member 8 contracts in this state, the rubber layer 12 in the rubber bearing 3 is sheared and deformed so that the lower side of the rubber layer 12 is deviated forward.

When the beam material 8 contracts by about half of the total amount of contraction of the beam material 8,
When the press fitting IO and stopper fitting 1■ are removed,
Due to the contraction of the girder 8, the upper metal plate 6 of the rubber bearing 3 is moved forward via the upper support plate 9, and the shear deformation of the rubber layer 12 in the rubber bearing 3 is removed.

(Example) Next, the present invention will be described in detail based on an example shown in the drawings.

Figures 1 to 10 show embodiments of the first invention, and Figures 1 to 4 show the rubber bearing installation device just before the girder 8 made of a concrete bridge girder starts shrinking. At the front and rear ends of the lower support plate main body 13 made of a steel plate in the direction of contraction of the girder, there are a front protrusion 14 and a rear part extending in the width direction of the girder (in the direction perpendicular to the bridge axis) and protruding upward. The protrusions 15 are integrally arranged, and in the middle part of the longitudinal direction of the girder on both sides of the lower support plate main body 13 in the width direction of the girder, there is a side portion extending in the longitudinal direction of the girder and protruding upward. The protrusions 16 are integrally arranged,
A sliding support plate 17 made of a stainless steel plate is fixed to the upper surface of the lower support plate main body 13 with an adhesive or the like, and a front protrusion 14 and a rear protrusion 14 are integrally connected to the lower support plate main body 13. 15. The lower support plate 2 consisting of the side protrusions 16 is placed on a support structure 1 such as a concrete abutment or a bridge pier, and the plurality of anchor members 18 fixed to the lower surface of the lower support plate 2 are attached to the support structure 1. It is embedded in object 1.

In a rubber support 3 consisting of a rubber layer 12 and an upper metal plate 6 and a lower metal plate 4 fixed to both upper and lower surfaces thereof, lower engaging protrusions 5 are integrally provided on both left and right sides of the rear side of the lower metal plate 4. , upper engagement protrusions 7 are connected to the body on both left and right sides of the front side of the upper metal plate 6, and the lower metal plate 4
Synthetic resin sliding plates 19 and 20 made of tetrafluoroethylene are fixed to the lower surface and the upper surface of the upper metal plate 6 with adhesive, etc., and the lower sliding plate 19 of the rubber support 3 is attached to the lower support plate 2.
ixz on the sliding support plate 17 on the top surface.

A front protrusion 22 and a rear protrusion 23 extend in the width direction of the girder and protrude downward at the front and rear ends of the upper support plate main body 21 made of a steel plate in the direction of contraction of the girder.
are integrally arranged in series, and at the intermediate part in the longitudinal direction of the girders on both sides of the upper support plate main body 21 in the direction of the girders 11, there are side protrusions 24 extending in the longitudinal direction of the girders and protruding downward. A sliding support plate 25 made of a stainless steel plate is fixed to the lower surface of the upper support plate main body 21 with an adhesive or the like, and the upper support plate main body 21 and a front portion integrally connected thereto are fixed to the lower surface of the upper support plate main body 21. Projection 22, rear projection 23. The upper support plate 9 is constituted by the side protrusions 24, and the sliding support plate 25 on the lower surface of the upper support plate 9 is placed on the sliding plate 20 on the upper part of the rubber support 3, and is fixed to the upper surface of the upper support plate 9. The plurality of anchor members 26 thus constructed are embedded in a concrete girder member 8 constructed on the upper part of the upper support board 9.

Front surface and front protrusion 14 of lower metal plate 4 in rubber bearing 3
A gap is provided between the lower metal plate 4 and the rear surface, and the rear surface of the lower metal plate 4 is placed in contact with or close to the front surface of the rear protrusion 15, and the upper metal plate 6 of the rubber support 3
A gap is provided between the rear surface and the front surface of the rear protrusion 23, and the front surface of the upper metal plate 6 is arranged so as to contact or be close to the rear surface of the front protrusion 22, and the lower engagement protrusion The advancing press fittings 10 that engage with the rear surface of the upper support plate 9 are disposed on the rear lower surface of both the left and right sides of the upper support plate 9.
A bolt 2 that is engaged with the front surface of the rear protrusion 23, inserted through the flange of the press fitting 10, and screwed into the upper support plate 9.
7, the press fitting 10 is detachably fixed to the upper support plate 9.

A stopper fitting 11 that engages with the front surface of the upper engagement protrusion 7
are arranged on the front upper surface on both left and right sides of the lower support plate 2, and are engaged with the rear surface of the front protrusion 14, and are connected to the stopper fitting 1.
The stopper metal fitting 11 is removably fixed to the lower support plate 2 by a bolt 28 inserted through the flange of 1 and screwed to the lower support plate 2, and the lower engagement protrusion 5 and the side protrusion 13 are connected to each other. A gap is provided between the upper engaging protrusions 7
A gap is provided between and the side protrusion 24.

From the state shown in Figure 1, the girder material 8 undergoes drying shrinkage 5 creep.
When the rubber bearing 3 contracts due to the introduction of prestress, etc., the stopper fitting 11 and the upper engagement protrusion 7 engage with each other.
A pressing fitting 10 is attached to an upper support plate 9 that prevents the upper metal plate 6 from moving forward and is fixed to the girder 8.
As a result, the lower metal plate 4 of the rubber bearing 3 is pressed through the lower engagement protrusion 5, and the sliding plate 1 on the lower surface of the lower metal plate 4 is pressed.
9 slides forward on the sliding support plate 17 on the upper surface of the lower support plate 2, and the lower side of the rubber layer 12 is sheared and deformed so as to be deviated forward, and further the lower part of the upper support plate 9 slides forward. The support plate 25 is a sliding plate 20 on the top of the rubber support 3.
It slides on the surface.

When the beam member 8 contracts by approximately half of the total amount of contraction, the front surface of the lower metal plate 4 comes into contact with or approaches the rear surface of the front protrusion 14, and the rear surface of the upper metal plate 6 comes into contact with or approaches the rear surface of the front protrusion 14, as shown in FIG. It contacts or approaches the front surface of the rear protrusion 23. Then, when the girder material 8 slightly expands due to the rise in temperature, pol) 27.2
8, and remove the press fitting 10 and the stopper fitting 11 to obtain the state shown in FIG.

As the girder 8 further contracts from the state shown in FIG. 6, the upper metal plate 6 is moved forward by the upper support plate 9 while the lower metal plate 4 is stopped, and the rubber layer 12 is sheared. decreases and when the contraction of the girder material 8 is completed, the seventh
As shown in the figure, the shear deformation of the rubber layer 12 is almost eliminated.

Next, as shown in FIGS. 8 to 10, the lower metal plate 4
A fixing metal fitting 29 is interposed between the rear surface and the front surface of the rear protrusion 15, and a fixing bolt 30 inserted through the fixing metal fitting 29 is screwed into a female screw hole provided in advance in the lower support board 2. , and a fixing metal fitting 31 is interposed between the front surface of the upper metal plate 6 and the rear surface of the front protrusion 22, and the fixing metal fitting 31
The fixing bolt 32 inserted through the upper support plate 9 is screwed into a female screw hole provided in advance in the upper support plate 9.

Figures 11 to 20 show embodiments of the second invention, and Figures 11 to 14 show the rubber bearing installation device just before the girder 8 made of a concrete bridge girder starts shrinking. In the lower support board main body 13 made of a steel plate, a front protrusion 1 extending in the width direction of the girder material and protruding upward is provided at an intermediate portion between the front and rear parts in the direction of contraction of the girder material.
4 and a rear protrusion 15 are integrally arranged, and at the intermediate part in the longitudinal direction of the girder on both sides of the girder width direction of the lower support plate main body 13, there is a groove extending in the longitudinal direction of the girder and protruding upward. The side protrusions 16 are integrally arranged, and lower support metal fittings 33 are integrally provided on both sides of the front end upper surface of the lower support plate body 13 in the width direction of the girder.

A sliding support plate 17 made of a stainless steel plate is fixed to the upper surface of the lower support plate main body 13 with an adhesive or the like, and a front protrusion 14 integrally connected to the lower support plate main body 13. Rear protrusion 15. The lower support plate 2 consisting of the side protrusions 16 and the lower support metal fittings 33 is placed on a support structure 1 such as a concrete abutment or a bridge pier, and the lower support plate 2
A plurality of anchor members 18 fixed to the lower surface of the support structure 1 are embedded in the support structure 1 .

In the rubber support 3, which consists of a rubber layer 12 and an upper metal plate 6 and a lower metal plate 4 fixed to both upper and lower surfaces thereof, the lower surface of the lower metal plate 4 and the upper surface of the upper metal plate 6 are made of synthetic resin made of tetrafluoroethylene. Sliding plates 19 and 20 are fixed with adhesive or the like, and the sliding plate 19 at the bottom of the rubber support 3 is placed R on the sliding support plate 17 on the upper surface of the lower support board 2.

A front protrusion 22 and a rear protrusion 23, which extend in the width direction of the girder material and protrude downward, are integrally connected to the front and rear intermediate portions of the upper support plate main body 21 made of a steel plate in the direction of contraction of the girder material. and at the intermediate part in the longitudinal direction of the girder on both sides of the upper support plate main body 21 in the width direction of the girder.
A side protrusion 24 extending in the longitudinal direction of the girder member and protruding downward is integrally connected to the upper support plate main body 21.
Upper support fittings 34 are integrally provided on both sides in the width direction of the girder on the lower surface of the rear end.

A stopper insertion hole 35 extending in the width direction of the girder is provided in the middle part of the front part of the upper support plate main body 21 in the width direction of the girder at a position adjacent to the rear part of the front protrusion 22. 35, the lower part of a steel plate stopper 37 having a locking protrusion 36 at its upper end is inserted, and a stopper covering cover 38 is provided on the upper surface of the upper support plate main body 21.
is fixed thereto, and an elastic member 39 for pressing down the stopper made of synthetic resin sponge is interposed between the upper surface plate of the cover 38 and the upper surface of the stopper 37.

A sliding support plate 25 made of a stainless steel plate is fixed to the lower surface of the upper support plate main body 21 with adhesive or the like, and a front protrusion 22 is integrally connected to the upper support plate main body 21.
．． Rear protrusion 23. Side protrusion 24 and upper support metal fitting 34
The upper support plate 9 is constituted by the sliding support plate 25 on the lower surface of the upper support plate 9 and the sliding plate 20 on the upper surface of the rubber bearing 3 on the lower surface of the spring bar 37. ! A plurality of anchor members 26 placed on the upper support plate 9 and fixed to the upper surface of the upper support plate 9 are embedded in a concrete girder member 8 constructed on the upper part of the upper support plate 9.

Front surface and front protrusion 14 of lower metal plate 4 in rubber bearing 3
A gap is provided between the lower metal plate 4 and the rear surface, and the rear surface of the lower metal plate 4 is placed in contact with or close to the front surface of the rear protrusion 15, and the upper metal plate 6 of the rubber support 3
A gap is provided between the rear surface and the front surface of the rear protrusion 23 , and the front surface of the upper metal plate 6 is arranged so as to contact or be close to the rear surface of the front protrusion 22 , and the rear surface of the rubber support 3 Advance pressing fittings 10 are disposed on both sides in the width direction of the girder material, and the pressing fittings 10 are engaged with the front surface of the upper support fitting 34 and are fixed to the upper support plate 9 by bolts 27. The lower part of the metal fitting 10 is a rubber support 3
It is arranged so as to be in contact with or close to the rear surface of the lower metal plate 4 at.

Stopper metal fittings 11 are arranged on both sides in the width direction of the girder material at the front part of the rubber bearing 3, and the stopper metal fittings 11 are engaged with the rear surface of the lower support metal fitting 33, and the lower support plate 2
is fixed with bolt 2, and stopper fitting 1
The upper part of the rubber support 3 is placed in contact with or close to the front surface of the upper metal plate 6 .

From the state shown in FIG. 11, the girder material 8 dries and shrinks.

When the rubber bearing 3 contracts due to creep, prestress introduction, etc., the stopper fitting 11 prevents the upper metal plate 6 from moving forward on the rubber bearing 3, and the pressing fitting 10 fixed to the upper support plate 9 causes the rubber bearing 3 to move forward. Lower metal plate 4
is pressed, the sliding plate 19 on the lower surface of the lower metal plate 4 slides forward on the sliding support plate 17 on the upper surface of the lower support plate 2, and the lower side of the rubber [12] is deflected forward. Then, the lower sliding support plate 25 of the upper support plate 9 slides on the upper sliding plate 20 of the rubber support 3.

When the finger material 8 contracts by about half of the total amount of contraction, the 15th
As shown in the figure and FIG. 16, the front surface of the lower metal plate 4 contacts or approaches the rear surface of the front protrusion 14, and the rear surface of the upper metal plate 6 contacts or approaches the front surface of the rear protrusion 23, In addition, a stopper 37 is inserted between the front protrusion 22 and the upper metal plate 6 of the rubber support 3. Next, when the beam member 8 slightly expands due to the rise in temperature, the bolts 27 and 28 are unscrewed and the press fitting 10 and the stopper fitting 11 are removed.
The state shown in FIG. 17 is established.

As the girder material 8 further contracts from the state shown in Fig. 17,
While the lower metal plate 4 is stopped, the upper metal plate 6 is moved forward by the upper support plate 9, the shear deformation of the rubber layer 12 is reduced, and when the contraction of the girder 8 is completed,
As shown in FIG. 18, the shear deformation of the rubber layer 12 is almost eliminated.

Next, as shown in FIG. 19 and FIG.
The fixing bolt 30 inserted through the fixing metal fitting 29 is screwed into a female screw hole provided in the lower support board 2 in advance.

(Effects of the Invention) Since the present invention is configured as described above, it has the following effects.

A press fitting IO attached to an upper support plate 9 fixed to a girder 8 is engaged with the lower engagement protrusion 5 of the lower metal plate 4 of the rubber bearing 3 or the rear part of the lower metal plate 4,
and the stopper fitting 11 attached to the lower support plate 2 fixed to the support structure 1 is engaged with the upper engagement protrusion 7 of the upper metal plate 6 of the rubber support 3 or the front part of the upper metal plate 6. When the girder material 8 contracts in this state, the rubber layer 12 in the rubber bearing 3 is sheared and deformed so that the lower side of the rubber layer 12 deviates forward, and approximately the total amount of contraction of the girder material 8 is reduced. When the girder material 8 shrinks by half, the press fitting 1
0 and the stopper fitting 11 are removed, the upper metal plate 6 of the rubber bearing 3 is moved forward via the upper support plate 9 due to the contraction of the girder 8, and the shear deformation of the rubber layer 12 in the rubber bearing 3 is removed. Therefore, from the start of contraction to the end of contraction of the girder material 8, it is only necessary to cause the rubber layer 12 in the rubber bearing 3 to undergo shear deformation equivalent to about half of the amount of contraction of the girder material 8. It is possible to manufacture the rubber bearing 3 economically by reducing the thickness of the rubber layer 12 in the rubber bearing, and to reduce the horizontal force applied to the support structure 1 due to shear deformation of the rubber bearing. The shear deformation of the rubber layer 12 of the rubber bearing 3 is automatically performed when the girder 8 finishes shrinking, without giving a predetermined shear deformation to the bearing or holding the rubber bearing in a pre-shear deformation state using a pre-shear deformation holding device. The rubber bearing 3 can be easily installed by simple means so that it can be easily removed.

Further, in the case of the second invention, the lower engaging protrusion 5 is integrally provided on the side of the lower metal plate 4 of the rubber bearing 3, and the upper engaging protrusion 7 is integrally provided on the side of the upper metal plate 6 of the rubber bearing 3. The rubber bearing 3 can be installed by a simple means without having to install the rubber bearing 3.

[Brief explanation of the drawing]

1 to 10 show an embodiment of the first invention, in which FIG. 1 is a partially longitudinal side view showing the rubber bearing installation device just before the girder material starts to shrink, and FIG. is A in Figure 1
-A sectional view, Figure 3 is a B-E sectional view of Figure 1, 4th
The figure is an enlarged longitudinal cross-sectional side view showing the sliding structure of the rubber bearing, the lower support plate, and the upper support plate. Figure 5 is a partially longitudinal side view showing the state of each part when the girder material has shrunk by about half of the total amount of contraction, and Figure 6 is the state shown in Figure 5 with the advancement press fitting and stopper metal removed. Fig. 7 is a partially longitudinal side view showing the state of the girder, Fig. 7 is a partially longitudinal side view showing the state of each part when the girder material has finished shrinking, and Fig. 8 shows the fixing fittings installed after the girder material has finished shrinking. A partially longitudinal side view showing the state, FIG. 9 is a sectional view taken along the line C-C in FIG. 8, and FIG. 10 is a sectional view taken along the line D-D in FIG. 8.
FIG. 11 to 20 show an embodiment of the second invention, in which FIG. 11 is a partially vertical side view showing the rubber bearing installation device just before the girder material starts to contract, and FIG. 12 is the first
Figure 13 is a cross-sectional view taken along line E-E in Figure 1, Figure 13 is a cross-sectional view taken along line F-F in Figure 1I, and Figure 14 is a cross-sectional view of the rubber bearing, lower support plate, and upper support plate just before the girder material starts to contract. FIG. 3 is an enlarged vertical cross-sectional side view showing the sliding structure and the stopper fitting. Figure 15 is a partially longitudinal side view showing the state of each part when the girder material has shrunk by about half of its total shrinkage, and Figure 16 shows the stopper between the front protrusion and the upper metal plate of the rubber bearing. Fig. 17 is a partial longitudinal side view showing the state in which the advancing press fitting and stopper fitting have been removed from the state shown in Fig. 15, and Fig. 18 is a longitudinal side view showing the state in which the girder material has finished shrinking. Fig. 19 is a partially jointed side view showing the condition of each part when the girder material has finished shrinking; -C line sectional view. In the figure, 1: support structure, 2: metal lower support board, 3: rubber support, 4: lower metal plate, 5: lower engagement protrusion, 6: upper metal plate, 7: upper engagement protrusion, 8; Girder material, 9: Metal upper support plate, 10: Advance press fitting, 11: Stopper fitting,
12; Rubber layer, 14: Front protrusion, 15: Rear protrusion, 16
: Side protrusion, 17: Sliding support plate, 19 and 20: Synthetic resin sliding temporary, 22: Front protrusion, 23: Rear protrusion, 24
: side protrusion, 25: sliding support plate, 27 and 28; bolt, 29; fixing metal fitting, 30: fixing bolt, 31: fixing metal fitting, 32: fixing bolt, 33: lower support metal fitting,
34: Upper support metal fitting, 35 varnish) Y pa insertion hole, 36:
Locking protrusion, 37; stopper made of steel plate.

Claims (2)

[Claims] (1) A lower engaging protrusion 5 is integrally provided on the side of the lower metal plate 4 of the rubber bearing 3 placed on the metal lower support plate 2 fixed to the upper part of the support structure 1, and the rubber bearing 3 An upper engaging protrusion 7 is integrally provided on the side of the upper metal plate 6 in 5, the advancing press fitting 10 is engaged with the rear part in the contraction direction of the girder material.
The stopper fitting 11 engaged with the front part of the upper engagement protrusion 7 in the contraction direction of the beam material is removably fixed to the metal lower support plate 2, and then the contraction of the beam material 8 is removably fixed. The lower metal plate 4 of the rubber support 3 is connected to the rubber support 3 via the metal upper support plate 9, the advancing press fitting 10, and the lower engagement protrusion 5.
Press the rubber layer 12 of the rubber bearing 3 forward,
The lower side of the rubber layer 12 is sheared and deformed so as to be deviated forward, and then the advancement press fitting 10 and the stopper fitting 11 are removed. A method for installing a rubber bearing in which shear deformation of a rubber layer 12 in the rubber bearing 3 is removed by moving the upper metal plate 6 of the rubber bearing 3 forward. (2) Place the metal upper support plate 9 fixed to the lower part of the girder 8 on the rubber support 3 placed on the metal lower support plate 2 fixed to the upper part of the support structure 1, An advancement pressing fitting 10 detachably fixed to the upper support plate 9 is engaged with the rear part of the lower metal plate 4 of the rubber bearing 3 in the direction of girder material contraction, and the front part of the upper metal plate 6 of the rubber bearing 3 is engaged. , a stopper fitting 11 detachably fixed to the lower support plate 2;
The lower metal plate 4 of the rubber bearing 3 is then pressed forward through the upper support plate 9 and the advancing press fitting 10 by the contraction of the girder 8, and the rubber layer 12 of the rubber bearing 3 is The lower side of the rubber layer 12 is sheared and deformed so as to be deviated forward, and then the advancement press fitting 10 and the stopper fitting 11 are removed. A method for installing a rubber bearing in which shear deformation of a rubber layer 12 in a rubber bearing 3 is removed by moving the upper metal plate 6 of the bearing 3 forward.