JP2660828B2 - Elastic bearing device for cross girder bearing and method of installing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic bearing device for a cross beam which is installed in a direction perpendicular to the longitudinal direction (bridge axis direction) of a superstructure such as an automobile road (bridge axis direction) and its installation. It is about the method.

[0002]

2. Description of the Related Art Conventionally, as a rubber bearing device for supporting a cross beam arranged in a direction perpendicular to the direction of a bridge axis, one having a structure in which the amount of expansion and contraction of the cross beam is absorbed by shear deformation of a rubber layer in the rubber bearing device. Are known. When a horizontal force distribution type rubber bearing is used at the end of a cross girder installed in a direction perpendicular to the longitudinal direction of the bridge, the amount of expansion and contraction in the direction perpendicular to the bridge axis (longitudinal direction of the cross girder) is extremely large. It may be larger than the amount of expansion and contraction in the axial direction. Conventionally, rubber bearings have a structure that absorbs the amount of movement of the structure installed on the rubber layer by the shear deformation of the rubber layer.To always correct the amount of expansion and contraction due to temperature change, preliminary shear deformation must be applied to the rubber layer. Must. However, due to the structure of the rubber bearing, it is difficult to apply preliminary shearing deformation in the direction perpendicular to the bridge axis. Furthermore, in the case of cross beams, especially steel cross beams, there is a problem that it is very difficult to install the cross beams to the pier because the cross beams expand and contract due to daily temperature changes, and the cross beams move due to camber, dead load and the like. Generally, the design is made with the direction perpendicular to the bridge axis fixed, but this may not be the case with independent columns (the piers in the direction perpendicular to the bridge axis become too large and difficult to design). Has invented an elastic bearing device for a horizontal girder bearing capable of adjusting the movement in the direction perpendicular to the bridge axis.

[0003]

In the conventional rubber bearing device, the amount of expansion and contraction of the cross beam is absorbed by the shear deformation of the rubber material. The shear deformation increased, and the rubber material in this state was further subjected to a strong horizontal force such as an earthquake.As a result, the rubber material became less cushioning, and the rubber layer in the rubber bearing device might be damaged. There is a problem of inefficiency.

[0004]

SUMMARY OF THE INVENTION In order to advantageously solve the above-mentioned problem, in a rubber bearing device for supporting a horizontal girder according to the present invention, a horizontal support of a lower support member 2 is provided above a pillar 1. The lower part of the central support member 3 is fixed, and an upward opening groove 21 is provided on the upper surface of the central support member 3. The elastic plate 4 made of rubber, the lower metal support plate 5, and the upper metal support plate 6 are provided. A lower support projection 20 is provided on the lower surface of the lower metal support plate 5 of the movable elastic support 7, and the lower support projection 20 is fitted into the upward opening groove 21 so as to be movable in the longitudinal direction of the cross beam orthogonal to the bridge axis direction. Further, the movable elastic bearing 7 is placed on the central supporting member 3 with a sliding bearing plate 10 interposed between the movable elastic bearing 7 and the central supporting member 3, and the upper metal supporting plate 6 Cross beam 8 arranged above
The upper support member 9 is fixed to the lower part of the base member, and the upper support member 9 is placed on the movable elastic support member 7 and is locked to the upper metal support plate 6. Further, in the rubber bearing device for supporting the cross beam according to the invention of claim 2, the horizontal center support member 3 is provided.
A stopper / holding member 13 for restricting the movement of the upper supporting member 9 is provided on both sides in the longitudinal direction of the cross beam, and a holding member 14 is attached to the stopper / holding member 13 by a bolt 15
And the horizontal portion 17 of the holding member 14
Are always arranged above the end flanges 18 connected to both ends of the upper support member 9 in the longitudinal direction of the cross beam. Furthermore, in the method for installing a rubber bearing device for supporting a cross beam according to the third aspect of the present invention, a lower portion of a horizontal center support member 3 in a lower support member 2 is fixed to an upper portion of a pillar 1, and the center support member is fixed. An upper opening groove 21 is provided on the upper surface of the lower metal support plate 5, and the lower surface of the lower metal support plate 5 of the movable elastic support 7 having an elastic plate 4 made of rubber, a lower metal support plate 5, and an upper metal support plate 6 is provided. A fixed lower bearing projection 20 is fitted in the upward opening groove 21 so as to be movable in a longitudinal direction of the cross beam orthogonal to the bridge axis direction, and a sliding bearing is provided between the movable elastic bearing body 7 and the central support member 3. The movable elastic bearing 7 is placed on the central support member 3 with the plate 10 interposed, and the upper support member 9 is placed on the movable elastic bearing 7 and is locked to the upper metal support plate 6, Next, the lower support projection 20 is opened upward. After adjusting and holding the relative position in the longitudinal direction of the cross beam perpendicular to the bridge axis direction with respect to the groove 21, and then fixing the cross beam 8 to the upper support member 9, the upward opening groove 21 and the lower support projection 20 are fixed. The holding of the relative position in the longitudinal direction of the cross beam with is released. In the method of installing a rubber bearing device for supporting a cross beam according to the present invention, a lower portion of a horizontal center support member 3 of a lower support member 2 is fixed to an upper portion of a pillar 1, and the center support member is fixed. An upper opening groove 21 is provided on the upper surface of the lower metal support plate 5, and the lower surface of the lower metal support plate 5 of the movable elastic support 7 having an elastic plate 4 made of rubber, a lower metal support plate 5, and an upper metal support plate 6 is provided. The fixed lower bearing projection 20 is connected to the upward opening groove 2.
1 is mounted so as to be movable in the longitudinal direction of the cross beam orthogonal to the bridge axis direction and immovable in the bridge axis direction, and furthermore, a sliding support plate 10 is provided between the movable elastic support body 7 and the central support member 3. The movable elastic support 7 is placed on the central support member 3 with the interposition therebetween, and the upper support member 9 is placed on the movable elastic support 7 and is locked on the upper metal support plate 6. Adjusting and holding the lower bearing protrusion 20 relative to the upward opening groove 21 in the longitudinal direction of the cross beam orthogonal to the bridge axis direction,
Next, after fixing the cross beam 8 to the upper support member 9,
The holding of the relative position in the longitudinal direction of the cross beam between the upward opening groove 21 and the lower support projection 20 is released.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. 1 to 1
1 shows an embodiment of the invention according to claim 1 and claim 2. As shown in FIGS. 10 and 11, square steel pipe bodies 39 are provided at both sides of a river or a road with an interval in the front-rear direction. The lower part of each square steel pipe main body 39 is fixed to the foundation concrete 42, and the square steel pipe main body 39 is filled with reinforced concrete 38 to form the pillar 1.

A lower portion of a horizontal center support member 3 of a steel lower support member 2 is fixed to an upper portion of the pillar 1, and a ridge 24 extending in the front-rear direction is provided at a lower portion of the center support member 3.
And a ridge 24 extending in the left-right direction is provided integrally,
An upper portion of the plurality of anchor members 23 is fixed to the lower portion of the horizontal center support member 3 by welding or screwed, and is fixed in the longitudinal direction of the cross beam of the center support member 3 (the left-right direction in FIG. 1). On both sides, a stopper / holding member 13 for restricting the horizontal movement of the steel upper support member 9 is integrally provided so as to protrude upward, and a horizontal center provided integrally with the anchor member 23 and the respective protrusions 24 is provided. The support member 3 is embedded and fixed integrally with a reinforced concrete 38 having a horizontal reinforcing bar (not shown) at the upper part of the pillar 1 and a vertical reinforcing bar (not shown) having a horizontal portion.

A movable elastic bearing 7 composed of a laminate in which a lower metal support plate 5 and an upper metal support plate 6 are integrally laminated and fixed on the lower and upper surfaces of an elastic plate 4 made of an elastic material such as rubber, respectively. A lower support projection (projection) 20 having a rectangular cross-section and projecting downward is integrally provided at the center of the lower surface of the lower metal support plate 5. The movable elastic bearing 7 is placed on the upper surface of the horizontal center support member 3, and the lower projecting portion 20 is connected to the upward opening groove 21 by a bridge. The movable elastic bearing member 7 is supported by the lower support member 2 so as to be immovable in the axial direction and movable in the longitudinal direction of the cross beam orthogonal to the bridge axis direction.

At the center of the upper surface of the upper metal support plate 6 of the movable elastic support 7, an upper support protrusion 12 projecting upward and having a substantially rectangular cross section is integrally provided, and the upper support protrusion 12 is made of steel. It is fitted in a substantially rectangular downward opening groove 11 provided on the lower surface of the support member 9. A sliding bearing plate 10 made of a synthetic resin plate such as tetrafluoroethylene is simply fitted to the lower surface of the movable elastic bearing member 7, or is fixed by an adhesive or the like, and a central portion of the sliding bearing plate 10 is provided. The through hole is fitted into the lower bearing projection 20.

At the center upper portion of the upper support member main body 26, a support projection 25 having a substantially rectangular cross section is provided.
An upper support member 9 having a downward opening groove 11 having a substantially rectangular cross section is mounted on the upper surface of the movable elastic support member 7, and a downward opening groove 11 in the upper support member 9 is mounted on the upper support member of the movable elastic support member 7. The lower support projection 20 of the movable elastic support body 7 is fitted and locked to the projection 12 so as to be movable in the longitudinal direction (left and right direction) of the transverse girder with respect to the upward opening groove 21 of the central support member 3 and to move in the front-back direction. A gap L is provided on each of the right and left sides of the upward opening groove 21 fitted with the lower support projection 20 so as not to be fitted.

That is, the upward opening groove 2 of the central support member 3
1 and a lower metal support plate 5
When the lower metal support plate 5 or the upper support member 9 is in a neutral position, a gap L is formed between the lower support protrusion 20 and the outer surface in the longitudinal direction of the cross beam, which are integrally fixed to the lower support protrusion 20.
As shown in FIG. 1, the gap L has the same distance on both sides in the longitudinal direction of the cross beam. That is, the above-mentioned left and right gaps L are gaps that allow expansion and contraction of the steel cross beam 8 due to temperature changes and the like, and the upper support member 9 fixed to the steel cross beam 8 by expansion and contraction within this allowable gap. Even if the movable elastic support 7 that moves together with the movable elastic support 7 slides, the elastic plate 4 in the movable elastic support 7, that is, the rubber layer, is not actively sheared and deformed, and the steel cross beam 8 and the upper structure erected thereon are provided. Since the object 49 can be supported, the shock absorbing function of the elastic plate 4 is not reduced by the expansion and contraction of the steel cross beam 8 when a horizontal force acts during an earthquake.

A vertically stepped wall portion 22 is provided at an intermediate portion in the front-rear direction on both sides of the upper support member 9 in the longitudinal direction (horizontal direction) of the horizontal girder, and has a flat upper surface connected at right angles thereto. An end flange 18 is integrally provided, and a stopper arm piece 27 is integrally provided on an end side of the end flange 18 in the front-rear direction.
The upper surface of 8 is arranged at substantially the same level as the upper surface of the stopper / holding member 13.

A longitudinal gap L ₁ between the vertical step wall portion 22 and the end of the horizontal portion 17 of the holding member 14, and a horizontal beam between the end face of the end flange 18 and the stopper / holding member 13. The longitudinal gap L ₂ is the upper support member 9
Movable width (the amount of expansion and contraction of horizontal girder 8) and elastic plate 4 at the time of earthquake, etc.
Is set to the total dimension with the allowable amount of shear deformation. The length of the upper support member 9 in the longitudinal direction of the cross beam is longer than that of the movable elastic bearing 7. On the upper surface of the upper support member 9, there is provided a steel intermediate support member 19 having a locking hole 28 in the center and a bolt insertion through hole 30 spaced around the locking hole 28. One end of the steel cross beam 8 is mounted on the upper surface of the intermediate support member 19, and the bolt insertion through hole 31 provided in the lower flange 29 of the steel cross beam 8 and the intermediate support Through hole 30 of member 19
The upper support member 9 is fixed to the steel cross beam 8 by screwing the cross girder mounting bolt 32 inserted therethrough into the screw hole 53 of the upper support member 9 (FIG. 6). reference). Note that the intermediate support member 19 is previously attached to the cross beam 8
May be fixed to the lower surface of the device by welding or bolts.

On the upper surface of each stopper / holding member 13,
The horizontal portion 17 of the inverted L-shaped steel pressing member 14 is placed, and the vertical portion 16 of the pressing member 14 is inserted into the through hole 51 provided in the vertical portion 16 and the stopper / holding member 13 is provided. Is fixed to the stopper / holding member 13 by a bolt 15 screwed into the female screw hole 52,
The lower surface of the horizontal portion 17 of the inverted L-shaped pressing member 14 is always in contact with the upper surface of an end flange 18 connected to both ends of the upper support member 9 in the longitudinal direction of the horizontal girder. It is arranged to be located.

FIGS. 12 and 13 show the case where the cross beam 8 is extended to the outer end side in the longitudinal direction of the cross beam to the maximum. Also in this case, the inverted L-shaped pressing member 14 is also used.
Is located above the end flange 18 of the upper support member 9, and the elastic plate 4 is subjected to shear deformation until the upper support member 9 contacts the stopper / holding member 13 during an earthquake. Even so, the lateral portion 17 is located above the end flange 18 in a state in which it overlaps with the end flange 18.

FIGS. 14 and 15 show an example in which a plurality of sliding bearing plates 10 are interposed.
Guide member 33 made of stainless steel plate on the upper surface
It shows an example in which (10) is fixed with a set screw or the like. By providing the sliding guide member 33 (10) in this way, the movable elastic bearing 7 can slide easily.

FIGS. 16 to 30 show an embodiment of the third and fourth aspects of the present invention, in which the lower support projection 20 of the movable elastic support body 7 is
In the case where the beam is relatively moved (deflected) in advance with respect to the upward opening groove 21, that is, in a case where the beam is installed in a temperature-corrected state in consideration of expansion and contraction due to temperature when the beam 8 is installed. As shown in FIG. 16, a longitudinal portion 3 of a steel L-shaped adjuster support member 34 is provided on both front and rear sides of the stopper / holding member 13, respectively.
5 is arranged and fixed, and the upper surface of the lateral portion 36 of each of the adjuster support members 34 is arranged at substantially the same level as the lower surface of the end flange 18 of the upper support member 9. It is attached to the stopper / holding member 13 in a state where one end in the longitudinal direction of the cross beam is displaced so as to protrude toward the upper support member 9. That is, the vertical portion 35 of the adjuster support member 34 is inserted into a plurality of horizontally elongated holes 37 provided therein, and the female screw hole 38 of the stopper / holding member 13 is provided.
17, is fixed on an upper surface of the horizontal portion 36 of the adjuster support member 34 by an L-shaped steel adjuster 4 having an unequal thickness as shown in FIG.
0 is placed, and an elongated hole 41 extending in the front-rear direction is provided in the lateral portion 36 of the adjuster support member 34,
The adjuster 40 is inserted into the elongated hole 41 and
The adjuster 40 is fixed to the adjuster support member 34 by a fixing tool 44 composed of a wing bolt screwed into the vertical female screw hole 42 of the steel adjuster 40.
Is in contact with the inner surface end of the stopper / holding member 13 in the longitudinal direction of the cross beam, and is disposed between the arm member 45 and the end surface of the end flange 18 of the upper support member 9. The other jack-engaging arm 46 of each steel adjuster 40 is spaced from the front end face or the rear end face of the stopper / holding member 13 in a direction (front-back direction) orthogonal to the longitudinal direction of the cross beam by a predetermined distance. They are arranged to face each other.

If necessary, one or more gap adjusting shim plates 4 are provided between the gap adjusting arm 45 of each steel adjuster 40 and the side end surface of the end flange 18.
29, the gap adjusting shim plate 47 is fixed by a hexagon socket head bolt 48 screwed into a female screw hole provided in the end flange 18 as shown in FIG. 29, for example, or as shown in FIG. As shown in (1), each of the steel adjusters 40 is attached to the gap adjusting arm piece 45 by a screw or the like. FIG. 22 shows left and right stopper / holding members 13.
Adjuster support member 34 and adjuster 4
0, the gap adjusting shim plate 47 is provided, and the upper supporting member 9 is provided.
The lower support projection 20 of the movable elastic support body 7 that moves together with the upper support groove 2 of the lower support member 2 is held while adjusting the relative position in the longitudinal direction of the cross beam. Next, as shown in FIG. 23 and FIG.
Is mounted and attached to the upper support member 9 by the cross beam mounting bolts 32, and then an upper structure 49 such as an automobile road is built or built on the steel cross beam 8.

Next, after the cross beam 8 or the upper structure 49 installed on the cross beam 8 is installed, the vertical female screw hole 4 of the steel adjuster 40 is formed.
Then, as shown in FIG. 28, the fixing tool 44 made of a wing bolt screwed into the connector 2 is removed, and then, as shown in FIG. Between the hydraulic jack 50
Place. Next, the hydraulic jack 50 is extended, and each steel adjuster 40 and the gap adjusting shim plate 47 are pulled out or removed, and the relative position of the upward opening groove 21 and the lower bearing protrusion 20 in the longitudinal direction of the cross beam is increased. Release the hold,
Subsequently, after the fixing tool 43 made of a wing bolt is removed and the adjuster support member 34 is removed, the stopper / holding member 1 is removed.
A rust-proof treatment is performed on the horizontal female screw hole 38 of No. 3. When the hydraulic jack 50 is removed, after the cross beam 8 is erected, a portion where external force is acting on the adjuster due to expansion and contraction of the cross beam 8 due to a change in the outside air temperature, and an external force is applied. The adjuster 40 is located at a position where no external force is applied, although there is a portion in a state where no external force is applied.
It can be removed by human power without being pulled out with the interposition of zero. As described above, by removing the adjuster 40 and the adjuster support member 34 and performing rust prevention treatment,
The installation of the cross girder support device is completed. That is, in response to expansion and contraction of the steel cross beam 8 due to a temperature change or the like, the movable elastic bearing 7 that moves together with the upper support member 9 is free to move,
A state in which the elastic bearing function of the elastic plate (layer) 4 such as rubber can be exerted against horizontal force due to an earthquake or the like.

As described above, in the case of FIGS. 12 and 13 showing the relationship between the upward opening groove 21 and the lower support projection 20 in the central support member 3 when the cross beam 8 is extended to the maximum, the lower support is used. When the protrusion 20 moves to the end side in the longitudinal direction of the cross beam with respect to the upward opening groove 21 in the central support member 3, and when the cross beam 8 is shortened, the lower support projection 20 is moved upward in the central support member 3. On the other hand, it is moved to the center side in the longitudinal direction of the cross beam (not shown).

In practicing the present invention, the lower bearing projection 20
The cross-sectional shape of the upward opening groove 21 may be an oval. Further, when the present invention is implemented, the cross-sectional shapes of the locking hole 28 and the supporting projection 25 may be circular.

In practicing the present invention, the movable elastic bearing 7
A plurality of sliding bearing plates 10 may be interposed between and the center support member 3.

[0022]

According to the first aspect of the present invention, even if the cross beam 8 expands and contracts due to daily temperature changes, the movable elastic bearing 7 together with the cross beam 8 moves in the bridge shaft direction with respect to the lower support member 2. Since it moves in the longitudinal direction of the cross beam orthogonal to the horizontal direction, the elastic plate 4 of the movable elastic bearing 7 can be erected without being subjected to shear deformation in the longitudinal direction of the cross beam. Therefore, even if a horizontal force such as an earthquake acts. The elastic plate 4 has a good cushioning property, and there is no possibility that the elastic bearing device is damaged.
Further, the structure is simple. Further, even if a strong horizontal force acts, the cross beam can be supported in a buffered state without exerting a strong supporting force. According to the invention of claim 2, even when the upper support member 9 moves due to the expansion and contraction of the cross beam 8, it is possible to reliably prevent the end flange 18 from coming off the horizontal portion 17 of the holding member 14. . According to the third or fourth aspect of the present invention, the elastic bearing device can be installed in a state where the installation position of the movable elastic bearing body due to expansion and contraction due to a temperature change in the longitudinal direction of the cross beam 8 is corrected in advance. ,
In addition, the elastic bearing device can be installed without causing the elastic plate 4 in the movable elastic bearing member 7 to be sheared in the longitudinal direction of the cross beam.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing an elastic bearing device for a horizontal girder bearing according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along line CC of FIG. 1;

FIG. 5 is a sectional view taken along line DD of FIG. 1;

FIG. 6 is an enlarged sectional view showing a part of FIG. 1;

FIG. 7 is a sectional view taken along line EE of FIG. 1;

FIG. 8 is a partially longitudinal side view showing an elastic bearing device for horizontal girder bearing according to the first embodiment of the present invention.

FIG. 9 is a partially longitudinal front view showing the elastic support device for the horizontal girder support according to the first embodiment of the present invention.

FIG. 10 is a plan view showing a state in which an upper structure such as an automobile road has been built in the elastic support device for cross beams supporting according to the embodiment of the present invention.

FIG. 11 is a longitudinal sectional front view showing a state in which an upper structure such as an automobile road is constructed on the elastic bearing device for horizontal beam support according to the embodiment of the first invention.

FIG. 12 is a vertical cross-sectional side view showing a state where a horizontal girder has been extended and a lower support projection of a movable elastic support body has moved together with an upper support member.

FIG. 13 is a sectional view taken along line FF of FIG. 12;

FIG. 14 is a longitudinal sectional side view showing an example in which a sliding bearing is provided on the upper surface of a lower support member.

FIG. 15 is a sectional view taken along line GG of FIG. 14;

FIG. 16 is a partial cross-sectional plan view showing a state where an adjuster support member is attached to the stopper / holding member 1.

FIG. 17 is a partial cross-sectional plan view showing a state where an adjuster is mounted on an adjuster support member and a shim plate is provided.

FIG. 18 is a partially longitudinal side view showing a state where the upper support member is held immovable in the longitudinal direction of the cross beam relative to the lower support member.

FIG. 19 is a sectional view taken along line HH of FIG. 18;

20 is a partially longitudinal front view showing a part of FIG. 19 in an enlarged manner.

FIG. 21 is a partially longitudinal side view showing a state where the upper support member is held immovable in the longitudinal direction of the cross beam relative to the lower support member.

FIG. 22 is a sectional view taken along line II of FIG. 21;

FIG. 23 is a partially longitudinal side view showing a state in which a cross beam is erected and fixed to an upper support member that has been adjusted and held.

FIG. 24 is a partial vertical front view of a portion shown in FIG. 23;

FIG. 25 is a perspective view showing an adjuster support member.

FIG. 26 is a plan view of the adjuster.

FIG. 27 is a sectional view taken along line JJ of FIG. 26.

FIG. 28 is a partial cross-sectional plan view showing a state in which a hydraulic jack for pulling out an adjuster is disposed between a stopper / holding member and an adjuster.

FIG. 29 is a partial cross-sectional plan view showing a part of FIG. 28 in an enlarged manner.

FIG. 30 is a partial cross-sectional plan view showing a state where the hydraulic jack is extended and the adjuster is pulled out.

FIG. 31 is a cross-sectional plan view showing another mounting example of the shim plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pillar 2 Lower support member 3 Horizontal center support member 4 Elastic plate 5 Lower metal support plate 6 Upper metal support plate 7 Elastic support body 8 Cross beam 9 Upper support member 10 Sliding support plate 11 Downward opening groove 12 Upper support protrusion 13 Stopper and holding member 14 Inverted L-shaped pressing member 15 Bolt 16 Vertical portion 17 Horizontal portion 18 End flange 19 Intermediate support member 20 Lower support projection 21 Upward opening groove 22 Vertical step wall portion 23 Anchor member 24 Projection 25 Non-circular cross section Of the supporting member 26 Upper movable support member main body 27 Stopper arm 28 Locking hole 29 Lower flange 30 Bolt insertion through hole 31 Bolt insertion through hole 32 Cross beam mounting bolt 33 Slip guide member 34 Adjuster support member 35 Vertical part 36 Horizontal part 37 Horizontal long hole 38 Female screw hole 39 Square steel pipe main body 40 Steel adjuster 41 Long 42 vertical internally threaded hole 43 fastener 44 fastener 45 gap adjustment arm pieces 46 jack engaging arm piece 47 gap 48 Hexagon socket head cap screw 49 superstructure 50 hydraulic jack 51 through hole 52 internally threaded hole 53 female screw hole

Claims (4)

(57) [Claims] 1. A lower portion of a horizontal center support member 3 of a lower support member 2 is fixed to an upper portion of a pillar 1, and an upward opening groove 21 is provided on an upper surface of the center support member 3 to provide elasticity such as rubber. A lower support projection 20 is provided on the lower surface of the lower metal support plate 5 in the movable elastic support 7 including the plate 4, the lower metal support plate 5, and the upper metal support plate 6, and the lower support projection 20 is opened upward. The sliding support plate 10 is fitted in the groove 21 so as to be movable in the longitudinal direction of the cross beam orthogonal to the bridge axis direction, and is further provided between the movable elastic support 7 and the central support member 3.
The movable elastic support 7 is placed on the central support member 3 with the intermediary of the upper metal support plate 6, and the upper support member 9 is fixed to the lower part of the cross beam 8 disposed above the upper metal support plate 6. An elastic bearing device for supporting a horizontal girder, wherein a member 9 is placed on the movable elastic bearing member 7 and is locked on the upper metal support plate 6. 2. A stopper / holding member 13 for restricting the movement of the upper supporting member 9 is provided on both sides of the horizontal center supporting member 3 in the longitudinal direction of the cross beam, and a pressing member 14 is provided on the stopper / holding member 13. Are fixed by bolts 15 so that the horizontal portion 17 of the pressing member 14 is always positioned above the end flanges 18 connected to both ends of the upper support member 9 in the longitudinal direction of the cross beam. The elastic bearing device for supporting a cross beam according to claim 1. 3. A lower portion of the horizontal center support member 3 of the lower support member 2 is fixed to an upper portion of the pillar 1, and an upward opening groove 21 is provided on an upper surface of the center support member 3 to provide elasticity such as rubber. A lower support projection 20 fixed to the lower surface of the lower metal support plate 5 of the movable elastic support 7 including the plate 4, the lower metal support plate 5, and the upper metal support plate 6 is connected to the upward opening groove 21 by a bridge shaft. The movable elastic bearing 7 is movably fitted in the longitudinal direction of the cross beam orthogonal to the direction, and furthermore, a sliding bearing plate 10 is interposed between the movable elastic bearing 7 and the central support member 3 to thereby move the movable elastic bearing 7 to the center support. The upper support member 9 is placed on the movable elastic support 7 and is fixed to the upper metal support plate 6.
After adjusting the relative position in the longitudinal direction of the cross beam orthogonal to the bridge axis direction with respect to the upward opening groove 21 and holding it, and then fixing the cross beam 8 to the upper support member 9, A method of installing an elastic bearing device for cross beam support, which releases the holding of the relative position with the lower support projection 20 in the longitudinal direction of the cross beam. 4. A lower part of the horizontal center support member 3 of the lower support member 2 is fixed to an upper part of the pillar 1, and an upward opening groove 21 is provided on an upper surface of the center support member 3 to provide elasticity such as rubber. A lower support projection 20 fixed to the lower surface of the lower metal support plate 5 of the movable elastic support 7 including the plate 4, the lower metal support plate 5, and the upper metal support plate 6 is connected to the upward opening groove 21 by a bridge shaft. Movably in the longitudinal direction of the cross beam perpendicular to the direction and immovable in the bridge axis direction, and is movable by interposing a sliding bearing plate 10 between the movable elastic bearing body 7 and the central supporting member 3. An elastic support 7 is mounted on the central support member 3, and the upper support member 9 is mounted on the movable elastic support 7 and locked on the upper metal support plate 6,
Next, after adjusting the relative position of the lower bearing protrusion 20 in the longitudinal direction of the cross beam orthogonal to the bridge axis direction with respect to the upward opening groove 21 and holding the same, and then mounting and fixing the cross beam 8 to the upper support member 9 A method for installing an elastic bearing device for supporting a girder, which releases the holding of the relative position between the upward opening groove 21 and the lower bearing protrusion 20 in the longitudinal direction of the girder.