JPH0413488B2 - - Google Patents

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 Connecting both ends of the front support member, the rear support member;
The rubber bearing is held in a shear deformation state by a pre-shear deformation holding device consisting of a front support member and a connecting member, and then the lower metal plate of the rubber bearing is held in a pre-shear deformation state by the pre-shear deformation holding device, Concrete girder material is constructed on top of the upper support plate, which is placed and locked on the lower support plate fixed to the top of the support structure, and on the upper metal plate of the rubber bearing. After the curing period of the concrete has elapsed, the preliminary shear deformation retaining device is removed from the rubber bearing, and then the upper support plate and A means for installing a rubber bearing is known in which the upper metal plate of the rubber bearing is moved forward to remove preliminary shearing deformation of the rubber layer in the rubber bearing when the girder material has finished shrinking.

(Problems to be Solved by the Invention) However, in the case of the conventional rubber bearing installation means, preliminary shear deformation is applied to the rubber bearing in advance at the factory, and the rubber bearing is held in a preliminary shear deformed state by a preliminary shear deformation holding device. In addition, a large and expensive pre-shear deformation holding device with a complicated structure is required, and furthermore, it is necessary to apply a pre-shear deformation to the rubber bearing corresponding to the amount of shrinkage of the girder material. It is necessary to apply a considerably large shear force, and the pre-shear deformation retaining device bears the reaction force of this large shear force, so when removing the pre-shear deformation retaining device from the rubber bearing after curing the concrete girder, In addition to requiring jacking, the 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, which is uneconomical as it becomes necessary to increase the thickness of the rubber layer. When a large preliminary shear deformation is applied to a rubber bearing, both the top and bottom sides of the rubber bearing tend to curve, so in order to prevent this curvature, a complicated method of holding both the top and bottom sides of the rubber bearing with a holding jig is required. shall be.

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 engagement protrusion 5 is integrally provided on the side of the lower metal plate 4 in the support 3, an upper engagement protrusion 7 is integrally provided on the side of the upper metal plate 6 in the rubber support 3,
A metal upper support plate 9 fixed to the lower part of the girder 8 and placed on the rubber support 3 is provided with an advancing press fitting 10 that is engaged with the rear part of the lower engagement protrusion 5 in the direction of contraction of the girder. The stopper fitting 11, which is removably fixed and engaged with the front part of the upper engagement protrusion 7 in the contraction direction of the girder material, is removably fixed to the metal lower support plate 2, and then when the girder material 8 contracts, Lower metal plate 4 on rubber support 3 via metal upper support plate 9, advancement press fitting 10, and lower engagement protrusion 5
The rubber layer 1 on the rubber bearing 3 is pressed forward.
2 is shear-deformed so that the lower side of the rubber layer 12 is deviated forward, and when the next beam material 8 contracts by about half of the total shrinkage amount of the beam material 8, the advancement press fitting 10 and The stopper fitting 11 is removed, and then the upper metal plate 6 of the rubber bearing 3 is moved forward via the metal upper support plate 9 due to the contraction of the beam 8, thereby removing the shear deformation of the rubber layer 12 in the rubber bearing 3.

In addition, a girder 8 is attached to a rubber support 3 placed on a metal lower support plate 2 fixed to the upper part of the support structure 1.
A metal upper support plate 9 fixed to the lower part of the rubber bearing 3 is placed on the rear part of the lower metal plate 4 in the girder material contraction direction. 10, and the stopper metal fitting 11 detachably fixed to the lower support plate 2 is engaged with the front part of the upper metal plate 6 in the rubber bearing 3, and then the upper support plate 9
Then, the lower metal plate 4 of the rubber bearing 3 is pressed forward via the advancement pressing fitting 10, and the rubber layer 12 of the rubber bearing 3 is shear-deformed so that the lower side of the rubber layer 12 is deviated forward. ,
Next, when the girder 8 has contracted by about half of the total amount of contraction of the girder 8, the advancing press fitting 10 and the stopper fitting 11 are removed, and then, due to the shrinkage of the girder 8, the The above object can also be achieved by moving the upper metal plate 6 of the rubber bearing 3 forward to remove shear deformation of the rubber layer 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 of the rubber bearing 3 or the rear part of the lower metal plate 4. , and the stopper metal fitting 11 attached to the fixed lower support plate 2 of 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 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, the pressing fitting 10 and the stopper fitting 1
When 1 is removed, the upper support plate 9 is removed due to contraction of the girder 8.
The upper metal plate 6 of the rubber bearing 3 is moved forward through the rubber bearing 3, 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 immediately before the girder 8 made of a concrete bridge girder starts shrinking. At the front and rear ends of the lower support board body 13 made of a steel plate in the direction of contraction of the girder, there are front protrusions 1 extending in the width direction of the girder (direction perpendicular to the bridge axis) and protruding upward.
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. side protrusion 16
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 part that is integrally connected to the lower support plate main body 13 is fixed to the upper surface of the lower support plate main body 13. Projection 14,
The lower support plate 2 consisting of a rear protrusion 15 and a side protrusion 16 is placed on a support structure 1 such as a concrete abutment or a bridge pier, and has a plurality of anchor members 18 fixed to the lower surface of the lower support plate 2. is embedded in the support structure 1.

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 of the rubber layer 12.
Lower engaging protrusions 5 are integrally connected to both left and right sides of the rear side of the lower metal plate 4, and upper engaging protrusions 7 are integrally connected to both left and right sides of the front side of the upper metal plate 6, Further, sliding plates 19 and 20 made of synthetic resin made of tetrafluoroethylene are fixed to the lower surface of the lower metal plate 4 and the upper surface of the metal plate 6 with adhesive or the like, and the sliding plate 19 at the bottom of the rubber support 3 is attached to the lower support plate. It is placed on a sliding support plate 17 on the top surface of 2.

Front protrusions 2 extending in the width direction of the girder and protruding downward are provided 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.
2 and a rear protrusion 23 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 upper support plate main body 21, there is a groove extending in the longitudinal direction of the girder and protruding downward. side protrusion 24
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 the upper support plate main body 21 and a front protrusion integrally connected thereto are fixed to the lower surface of the upper support plate main body 21. Article 22,
The rear protrusion 23 and the side protrusion 24 constitute an upper support plate 9, and a sliding support plate 25 on the lower surface of the upper support plate 9 is placed on the upper sliding plate 20 of the rubber support 3. A plurality of anchor members 26 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.

A gap is provided between the front surface of the lower metal plate 4 in the rubber bearing 3 and the rear surface of the front protrusion 14, and the rear surface of the lower metal plate 4 is in contact with or close to the front surface of the rear protrusion 15. A gap is provided between the rear surface of the upper metal plate 6 in the rubber bearing 3 and the front surface of the rear protrusion 23, and the front surface of the upper metal plate 6 is in contact with the rear surface of the front protrusion 22. Advancement pressing fitting 1 arranged close to each other and further engaged with the rear surface of the lower engaging protrusion 5
0 is disposed on the rear lower surface of the left and right sides of the upper support plate 9, and is engaged with the front surface of the rear protrusion 23,
The press fitting 10 is detachably fixed to the upper support plate 9 by bolts 27 inserted through the flange of the press fitting 10 and screwed onto the upper support plate 9.

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

When the girder 8 shrinks from the state shown in FIG. 1 due to drying shrinkage, creep, introduction of prestress, etc., the upper part of the rubber bearing 3 is The forward movement of the metal plate 6 is prevented, and the lower metal plate 4 of the rubber support 3 is pressed via the lower engagement protrusion 5 by the pressing fitting 10 attached to the upper support plate 9 fixed to the girder 8. 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 is sheared and deformed so that the lower side of the rubber layer 12 is biased forward. The plate 25 slides on the sliding plate 20 on the upper part of the rubber support 3.

When the beam member 8 contracts by about half of the total amount of contraction, as shown in FIG. is in contact with or close to the front surface of the rear protrusion 23. Next, bolts 27, 28
Screw off the press fitting 10 and stopper fitting 11.
Remove it and put it in the state shown in Figure 6.

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, as shown in FIG.
Shear deformation of the rubber layer 12 is almost eliminated.

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

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. A front protrusion 14 and a rear protrusion 15, which extend in the width direction of the girder material and protrude upward, are integrally formed at the intermediate portions of the front and rear parts of the lower support board main body 13 made of a steel plate in the direction of contraction of the girder material. A side protrusion 16 extending in the longitudinal direction of the girder and protruding upward is integrally connected to the lower support board main body 13 at an intermediate portion in the longitudinal direction of the girder on both sides of the girder width direction. Lower support metal fittings 33 are connected to the upper surface of the front end of the lower support plate main body 13 on both sides in the width direction of the girder.
are integrated.

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 and the lower support metal fittings 33 is placed on a support structure 1 such as a concrete abutment or a bridge pier, and has a plurality of anchor members fixed to the lower surface of the lower support plate 2. 18 is embedded in the support structure 1.

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 of the rubber layer 12.
The lower surface of the lower metal plate 4 and the upper metal plate 6 in
Synthetic resin sliding plates 19 and 20 made of tetrafluoroethylene are fixed to the upper surface with adhesive or the like, and the lower sliding plate 19 of the rubber support 3 is placed on the sliding support plate 17 on the upper surface of the lower support plate 2. ing.

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. A side protrusion 24 extending in the longitudinal direction of the girder and protruding downward is integrally connected to the middle portion of the upper support plate body 21 in the longitudinal direction of the girder on both sides of the girder width direction. and 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, a steel plate stopper 3 having a locking protrusion 36 at the upper end;
7 is inserted through the upper support plate main body 2.
A stopper covering cover 38 is fixed to the top surface of the stopper 1, and a stopper pressing elastic member 39 made of synthetic resin sponge is interposed between the top plate of the cover 38 and the top 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 an adhesive or the like, and a front protrusion 22 and a rear protrusion 23 are integrally connected to the upper support plate main body 21. , the side protrusion 24 and the upper support metal fitting 34 constitute the upper support plate 9, and the lower surface of the sliding support plate 25 and the stopper 37 on the lower surface of the upper support plate 9 are placed on the sliding plate 20 on the upper part of the rubber support 3. and the upper support plate 9
A plurality of anchor members 26 fixed to the upper surface of the
It is embedded in a concrete girder 8 constructed above the upper support plate 9.

A gap is provided between the front surface of the lower metal plate 4 in the rubber bearing 3 and the rear surface of the front protrusion 14, and the rear surface of the lower metal plate 4 is in contact with or close to the front surface of the rear protrusion 15. A gap is provided between the rear surface of the upper metal plate 6 in the rubber bearing 3 and the front surface of the rear protrusion 23, and the front surface of the upper metal plate 6 is in contact with the rear surface of the front protrusion 22. Advancement press fittings 10 are arranged close to each other and are further arranged on both sides in the width direction of the girder material at the rear of the rubber bearing 3, and the press fittings 10 are engaged with the front surface of the upper support fitting 34 and are engaged with the upper support fittings 34. Board 9
The lower part of the press fitting 10 is arranged so as to be in contact with or close to the rear surface of the lower metal plate 4 of the rubber support 3.

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 fixed to the lower support plate 2 by bolts 28. The upper part of the stopper fitting 11 is arranged so as to be in contact with or close to the front surface of the upper metal plate 6 of the rubber support 3.

From the state shown in FIG. 11, the girder material 8 shrinks due to drying.
When it contracts due to creep, prestress introduction, etc., the forward movement of the upper metal plate 6 on the rubber bearing 3 is prevented by the stopper fitting 11, and the rubber bearing is stopped by the pressing metal 10 fixed to the upper support plate 9. The lower metal plate 4 of No. 3 is pressed, and 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 metal plate 4 of the rubber layer 12 The side is sheared and deformed so as to be deviated forward, and furthermore, 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 beam member 8 contracts by approximately half of the total amount of contraction, as shown in FIGS. 15 and 16, 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 upper metal The rear surface of the plate 6 is in contact with or close to the front surface of the rear protrusion 23, and the stopper 37 is connected to the front protrusion 22 and the upper metal plate 6 of the rubber support 3.
inserted between. Next, bolts 27, 28
Screw off the press fitting 10 and stopper fitting 11.
Remove it and put it in the state shown in Fig. 17.

As the girder material 8 further contracts from the state shown in FIG. decreases, and when the shrinkage of the beam member 8 ends, the shear deformation of the rubber layer 12 almost disappears, as shown in FIG. 18.

Next, as shown in FIGS. 19 and 20, a fixing metal fitting 29 is interposed between the rear surface of the lower metal plate 4 and the front surface of the rear protrusion 15, and the fixing metal fitting 29
The fixing bolts 30 inserted into the lower support plate 2 are attached in advance.
It screws into the female screw hole provided in the.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

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, and is supported. A state in which the stopper metal fitting 11 attached to the lower support board 2 fixed to the 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 As the girder material 8 contracts, 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 the amount of contraction of the girder material 8 is approximately half of the total amount of contraction. When the girder material 8 contracts, when the pressing metal fittings 10 and the stopper metal fittings 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 material 8, and the rubber bearing 3 Since the shear deformation of the rubber layer 12 in the rubber bearing 3 is removed, the rubber layer 12 in the rubber bearing 3 is
Therefore, it is only necessary to cause shear deformation equivalent to about half of the amount of shrinkage of the girder material 8, and therefore the rubber bearing 3
The thickness of the rubber layer 12 in the rubber bearing 3 is reduced.
It is possible to economically produce a The rubber bearing 3 can be fixed in a simple manner so that the shear deformation of the rubber layer 12 of the rubber bearing 3 is automatically removed when the girder 8 finishes shrinking, without having to hold the rubber bearing in a pre-sheared deformed state. It can be easily installed by

Further, in the case of the second invention, the lower engagement protrusion 5 is integrally provided on the side of the lower metal plate 4 in the rubber,
The rubber support 3 can be installed by a simple means without integrally providing the upper engagement protrusion 7 on the side of the upper metal plate 6 of the rubber support 3.

[Brief explanation of drawings]

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 sectional view taken along the line A-A in Fig. 1, Fig. 3 is a sectional view taken along the line B-B in Fig. 1, and Fig. 4 is an enlarged longitudinal sectional view showing the sliding structure between the rubber bearing, the lower support plate, and the upper support plate. It is a diagram. Figure 5 is a partial longitudinal cross-sectional view showing the state of each part when the girder material has shrunk by approximately half of its total shrinkage amount, and Figure 6 is a partial vertical sectional view showing the state of each part when the girder material has shrunk by about half of the total amount of contraction. Fig. 7 is a partially longitudinal side view showing the condition of each part when the girder material has finished shrinking; Fig. 8 is a partially longitudinal side view showing the condition of the girder material when it has finished shrinking; Figure 9 is a partially longitudinal side view showing the state shown in Figure 8.
-C line sectional view, and FIG. 10 is a DD line sectional view of 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 a cross-sectional view taken along line E-E in Figure 11, Figure 13 is a cross-sectional view taken along line F-F in Figure 11, and Figure 14 is a rubber bearing, lower support plate, and upper support plate just before the girder material starts to contract. FIG. 2 is an enlarged vertical cross-sectional side view showing the sliding structure and the vicinity of the stopper. 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 the 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. Partial longitudinal side view showing the state of each part when
FIG. 9 is a partially longitudinal side view showing a state in which the fixing fittings are attached after the girder material has finished shrinking, and FIG. 20 is a sectional view taken along the line GG in FIG. 19. In the figure, 1: support structure, 2: metal lower support plate, 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 plate, 22: Front protrusion, 23: Rear protrusion,
24: side protrusion, 25: sliding support plate, 27 and 28: bolt, 29: fixing metal fitting, 30: fixing bolt, 30: fixing metal fitting, 32: fixing bolt, 33: lower support metal fitting, 34 : Upper support bracket,
35: Stopper insertion hole, 36: Locking protrusion, 37:
Steel plate stopper.

Claims (1)

[Scope of Claims] 1. A lower engagement protrusion 5 is integrally provided on the side of the lower metal plate 4 of the rubber support 3 placed on the metal lower support plate 2 fixed to the upper part of the support structure 1,
An upper engaging protrusion 7 is integrally provided on the side of the upper metal plate 6 of the rubber bearing 3, and the metal upper support plate 9 fixed to the lower part of the girder 8 and mounted on the rubber bearing 3 is provided with the upper engaging protrusion 7. A stopper fitting that detachably fixes an advancing press fitting 10 that is engaged with the rear part of the lower engagement protrusion 5 in the direction of contraction of the beam material, and that is engaged with the front part of the upper engagement protrusion 7 in the direction of contraction of the beam material. 11
is removably fixed to the metal lower support plate 2, and then the lower metal plate of the rubber support 3 is attached to the rubber support 3 via the metal upper support plate 9, the advancement press fitting 10, and the lower engagement protrusion 5 by shrinking the girder 8. Press 4 forward,
The rubber layer 12 in the rubber bearing 3 is
2 is sheared so that the lower side thereof is deviated forward, and then when the beam material 8 contracts by about half of the total amount of contraction of the beam material 8, the advancement press fitting 10
and the stopper fitting 11, and then the girder 8
A method of installing a rubber bearing in which shear deformation of a rubber layer 12 in a rubber bearing 3 is removed by moving an upper metal plate 6 of a rubber bearing 3 forward via an upper metal support plate 9 due to contraction of the rubber bearing. 2. The 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 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 in the direction of contraction of the girder material, and the lower part The stopper metal plate 11 detachably fixed to the support plate 2 is engaged, and then the lower metal plate 4 of the rubber support 3 is pressed forward by the contraction of the girder 8 via the upper support plate 9 and the forward pressing metal plate 10. Then, rubber bearing 3
The rubber layer 12 in is shear-deformed so that the lower side of the rubber layer 12 is deviated forward, and then when the beam material 8 is contracted by about half of the total shrinkage amount of the beam material 8, the forward pressing force is applied. The metal fittings 10 and the stopper fittings 11 are removed, and then the upper metal plate 6 of the rubber bearing 3 is moved forward through the upper support plate 9 due to the contraction of the girder 8, thereby removing the shear deformation of the rubber layer 12 in the rubber bearing 3. How to install rubber bearings.