JP2001226911A - Elastic bearing device for bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economical and simple-structural bearing device for bearing load for an upper structure or an elastic bearing device for a bridge for lifting power or horizontal shear-deformation elastic resistance. SOLUTION: A connecting retaining projecting section 5 with a male screw section is installed integrally so as to be upwards projected at the central section of of an upper steel plate 2 in an elastic bearing body 4 integrally the upper section having the upper steel plate 2 and a lower steel plate 3 respectively in the upper section and lower section of an elastic layer 1, a connecting retaining projecting section 6 with the male screw section is mounted integrally so as to be downwards projected at the central section of the lower section of the lower steel plate 3, an upper bearing member 8 made of steel fixed onto an upper structure 7 is placed on the upper steel plate 2 while being screwed and connected to the retaining projecting section 5 of the upper steel plate 2, and the lower steel plate 3 is placed on a lower bearing member 9 fixed onto a lower structure 17 while the retaining projecting section of the lower steel plate 3 is screwed and connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention is provided between an upper structure such as a bridge girder and a lower structure such as a pier or an abutment,
Used together with an elastic bearing device for the bridge load and the upward lift and the lateral shear deformation elastic resistance at the time of earthquake, etc. or as a bearing device for the upward lift and the lateral shear deformation elastic resistance. The present invention relates to an elastic bearing device for a bridge.

[0002]

2. Description of the Related Art Conventionally, as a structure of an elastic bearing device for resisting an upward lifting force at the time of an earthquake or the like, as shown in FIG.
(A) When the elastic support 4 integrally provided with the upper steel plate 2 and the lower steel plate 3 on the upper and lower portions of the elastic layer 1 is attached to the upper structure 7 and the lower structure 17, Also puts a wide upper connecting steel plate 20,
The upper steel plate 2 and the upper connection steel plate 20 are connected to each other by the upper steel plate 2.
The upper connecting steel plate extends over a number of small-diameter female screw holes 21 for bolt screwing provided at intervals on the upper surface side and a number of small stepped through-holes 22 for bolt insertion provided on the upper connecting steel plate 20. The upper supporting member 18 connected to the upper connecting steel plate 20 and the upper structure 7 by a large number of small-diameter connecting bolts 23 screwed from above from the upper side of the upper connecting member 20 is attached to the periphery of the upper connecting steel plate 20. The lower side of the upper support member 18 extends over a number of small-diameter through holes 24 for bolt insertion provided at intervals and a number of small-diameter female screw holes 25 for bolt screwing provided on the peripheral portion of the upper support member 18. Are connected by a large number of small-diameter connecting bolts 26 screwed into them, and a locking concave portion 27 provided at an upper central portion of the upper steel plate 2 and a locking concave portion 28 provided at a lower central portion of the connecting steel plate 20. Across Lateral shear resistance member (steel locking member) 29 is inlaid.

Further, the lower steel plate 3 is placed on a lower connecting steel plate 19 having a width wider than that of the lower steel plate 3, and the lower steel plate 3 and the lower connecting steel plate 19 are provided on the lower surface side of the lower steel plate 3 at an interval. A large number of small diameter female screw holes 30 for screwing bolts
And a plurality of small-diameter through holes 31 provided in the lower connecting steel plate 19 and connected to each other by a number of small-diameter connecting bolts 32 screwed in from below the lower connecting steel plate 19, and A lower support member 33 fixed to the lower connection steel plate 19 and the lower structure 17 is provided with a plurality of small-diameter through holes 34 for bolt insertion provided at intervals on a peripheral portion of the lower connection steel plate 19 and a lower support member. 33 are connected to each other by a large number of small-diameter connection bolts 36 inserted and screwed from above the lower connection steel plate 19 over a large number of small-diameter female screw holes 35 provided on the peripheral portion of the lower steel plate 3. A lateral shear resistance member (steel locking member) 39 extends over the locking concave portion 37 provided at the central portion and the locking concave portion 38 provided at the upper central portion of the lower connecting steel plate 19. Is installed Elastic bearing devices are known of.

[0004] As shown in FIG. 17, (B) an upper central portion of the upper steel plate 2 in an elastic bearing 4 having an upper steel plate 2 and a lower steel plate 3 integrally provided above and below the elastic layer 1, respectively. A locking projection 40 serving as a lateral shear resistance member is integrally provided so as to protrude upward, and a locking projection 41 serving as a horizontal shear resistance member is provided at a lower central portion of the lower steel plate 3. Are integrally provided so as to protrude downward, and a steel upper support member 18 fixed to the upper structure 7 is placed on the upper steel plate 2 and fitted to the locking projection 40 of the upper steel plate 2. The lower steel plate 3 is placed on the lower support member 33 fixed to the lower structure 7, and the locking projection 41 of the lower steel plate 3 is fitted.
3 is fixed to the side block 42 provided in the steel L
There is known an elastic bearing device for a bridge having a structure in which a mold hook 44 is engaged with a locking step portion 43 of an upper support member 18 to mechanically fix an upward lift force during an earthquake.

In the case of (A), in addition to the use of the shear resistance members (steel locking members) 29 and 39, in addition to the upper steel plate 2 and the lower steel plate 3 of the elastic layer 1, upper and lower support members are used. Since four steel plates 18 and 33 and connecting steel plates 19 and 20 are required, the structure becomes relatively complicated, and it is necessary to provide a large number of through holes for inserting small-diameter bolts and female screw holes. However, there is a disadvantage that the processing cost and the steel plate cost are increased and the production cost of the bearing device is increased. The above (B)
In the case of (1), in addition to the use of the lateral shear resistance member composed of the locking projections 40 and 41, a steel L-shaped hook for mechanically resisting the upward lift during an earthquake is required. Therefore, there is a disadvantage that the processing cost of each steel plate is increased and the manufacturing cost of the bearing device is increased, and it is not possible to elastically cushion and resist the upward lifting force during an earthquake. Furthermore, the above (A)
In both cases (B) and (B), the shear resistance member or the locking projection has a transverse cross-sectional shear resistance larger than that of other small-diameter bolts or the like, even though the cross-section is larger. At present, it is used for only one function as a member and is not used as an upper and lower connecting member facing the upward lift during an earthquake.

[0006]

SUMMARY OF THE INVENTION The present invention solves the disadvantages (A) and (B) economically and advantageously with a simple structure by providing a male screw portion on the outer peripheral side surface of the shear resistance member. It is an object of the present invention to provide an elastic bearing device for a bridge which can be used.

[0007]

SUMMARY OF THE INVENTION In order to advantageously solve the above-mentioned problems, in an elastic bearing device for a bridge according to the present invention, an upper steel plate 2 and a lower steel plate 3 are provided above and below an elastic layer 1, respectively. At the upper central portion of the upper steel plate 2 of the integrally provided elastic bearing 4, an upper connection locking projection 5 having a male screw portion is provided so as to protrude upward, and at the lower central portion of the lower steel plate 3. A lower connection locking projection 6 having an external thread portion is provided so as to project downward, and a steel upper support member 8 fixed to an upper structure 7 is placed on the upper steel plate 2 and the upper Upper connection locking projection 5 of steel plate 2
The lower steel plate 3 is placed on the lower support member 9 which is screwed and connected to the lower structure 17, and the lower connection locking projection of the lower steel plate 3 is screwed and connected to each other. It is characterized in that the connection locking projection is a member that transmits both a lateral shear force and an upward lift force during an earthquake.

Further, in the elastic bearing device for a bridge according to the present invention, an upper bearing of the upper steel plate 2 in an elastic bearing member 4 integrally provided with an upper steel plate 2 and a lower steel plate 3 on the upper and lower parts of the elastic layer 1 respectively. The lower portion of the lower steel plate 3 is provided with a lower connection locking recess 11 having a female screw portion, and the upper structure 7 is provided with a lower connection locking recess 11 having a female screw portion. At the lower central part of the steel upper support member 8 to be fixed, there is provided a connection locking recess 12 having a female screw portion, and the steel upper support member 8 is provided with the upper steel plate 2.
And the concave portion 10 for coupling and locking of the upper steel plate 2 and the concave portion 12 for coupling and locking of the upper steel support member 8.
The lower support member 9 fixed to the lower structure 7 is screwed and connected by a male screw member 13 screwed over the lower support member 9, and a connection locking concave portion 13 having a female screw portion is provided at an upper central portion. The lower steel plate 3 is placed on the support member 9, and the male screw member 14 is screwed into the connection locking recess 11 of the lower steel plate 3 and the connection locking recess 13 of the steel lower support member 9. The male screw members are coupled to each other, and each of the male screw members is a member that transmits both a lateral shear force and an upward lift force during an earthquake.

According to a third aspect of the present invention, there is provided an elastic bearing device for a bridge according to the first or second aspect of the present invention, together with the load bearing device for an upper structure disposed between the upper structure and the lower structure. In the elastic bearing device to be arranged,
It is characterized in that it is arranged in a no-load state that does not bear the load of the upper structure.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2 show a first embodiment of the present invention.
FIG. 3 is a diagram showing a state in which the bridge elastic bearing device of the embodiment is used as an elastic bearing device for bridge load bearing.
9 are main parts diagrams. 10 and 11 are used with a load bearing elastic bearing device,
It is a figure which shows the embodiment used as a bearing device for the upward lifting force at the time of an earthquake, and a lateral shear deformation elastic resistance.

First, as shown in FIGS. 3 to 5, an elastic layer 1a made of rubber and a steel plate 1b are alternately laminated to embed the steel plate 1b integrally in the elastic layer 1a. The lower surface of the upper steel plate 2 and the upper surface of the lower steel plate 3 are integrally fixed to the upper and lower portions of the elastic layer 1 by an adhesive or integral molding, respectively, to form a planar circular or rectangular elastic bearing 4a.

The upper steel plate 2 in the elastic support 4
A relatively large-diameter female screw hole or the like is provided in the center of the upper portion as shown by a dotted line, and a steel cylindrical or cylindrical shape having a male screw portion 15 over almost the entire length of the female screw hole or the like is provided. The lower portion of the lower connecting plate 5 is integrally fixed by screwing or welding, and is projected upward and integrally provided with the connecting and locking protrusion 5 having the male screw portion 15. A relatively large-diameter female screw hole or the like is provided in the lower central part as shown by a dotted line, and the steel cylindrical hole or the cylindrical shape provided with the male screw portion 16 over almost the entire length of the female screw hole or the like. The upper portion of the connection locking projection 6 is integrally fixed by screwing or welding, and the connection locking projection 6 provided with the male screw portion 16 projecting downward is provided on the lower lower steel plate 3. An upper steel plate 2 with a stop portion and a lower steel plate 3 with a connection locking portion are bonded to the elastic layer 1 with an adhesive or Are integrated by the body molding, a plane circular or rectangular, coupling engagement protrusion with an elastic support member 4 is formed.

FIGS. 6 and 7 show a steel upper support member 8 used in the first embodiment of the present invention. A relatively large female screw hole 52 screwed to
The upper portion of the female screw hole 52 is closed by a lid member 53 fixed to the upper surface side of the steel plate 51 by welding, and a concrete upper structure 7 is provided around the upper surface of the steel upper support member 8. The anchor bolts 54 embedded and fixed in the anchor bolts 54 are arranged at equal angular intervals, and the lower portions of the anchor bolts 54 are fixed by screwing or welding. As shown in FIGS. 1 and 2, the steel upper support member 8 is screwed and connected to the connection locking projection 5 of the upper steel plate 2 in the elastic support 4 with the connection locking projection. The lower surface of the member 8 is placed in a state where the lower surface of the member 8 is pressed against the upper surface of the upper steel plate 2. A formwork (not shown) is provided in a state where the steel upper support member 8 with anchor bolts is mounted and connected to the elastic support body 4 having the connection locking projections, and reinforcement and concrete are provided. 55 is cast and the concrete superstructure 7 is built.

FIGS. 8 and 9 show a lower steel support member 9 used in the first embodiment of the present invention. A relatively large-diameter female screw hole 46 screwed to
The lower portion of the female screw hole 46 is closed by a lid 47 fixed to the lower surface of the steel plate 45 by welding. At four corners of the lower surface of the steel lower support member 9, through holes 48 for inserting an anchor bolt are provided, and the inner peripheral surface of the arc-shaped cross section is provided at intervals in the direction perpendicular to the bridge axis with the female screw hole 46 interposed therebetween. A steel bearing member (side block) 66 having a divided cylindrical surface 67 is fitted in the through hole of the rectangular steel plate 45 so as to face each other, and is fixed by welding. As shown in FIGS. 1 and 2, the steel lower support member 9 is placed on the upper part of the concrete lower structure 17, and the upper part of the anchor bolt 49 embedded and fixed therein is used to insert the anchor bolt. The steel lower support member 9 is firmly fixed to the lower structure 17 by a nut 50 inserted into the through-hole 48 and screwed to the upper part of the anchor bolt 49.

A state in which the connection locking projection 6 having the male screw portion 16 of the elastic support 4 with the connection locking projection is in contact with the relatively large female screw hole 46 of the steel lower support member 9. The lower support member 9 is rotated so that the entire elastic support body 4 with the connection locking projection is pushed in a substantially horizontal state.
Locking projection 6 having male screw 16 in female screw hole 46
Are screwed together, and the lower surface of the lower steel plate 3 of the elastic support member 4 with the connection locking projection is brought into contact with the upper surface of the lower support member 9 in a state of being pressed. When rotating the entire elastic support body 4 with the connection locking projection, for example,
A steel upper support member 8 with an anchor bolt is attached and used to rotate the entire elastic bearing member 4 or a jig for rotating tool locking to the connection locking protrusion 5 on the upper steel plate 2 side. (Not shown) may be attached, and a rotary tool may be engaged with this to rotate the entire elastic support 4 with the connection locking projection.

Further, the steel upper support member 8 is in a state in which the female screw hole 52 of the steel upper support member 8 is brought into contact with the connection locking projection 5 on the upper part of the elastic support 4 with the connection locking projection. Then, the entire steel upper support member 8 is rotated, and the steel upper support member 8 is placed on the elastic support body 4 having the connection locking projection while being pressed against the screw, and is screwed and connected. In this state, a formwork (not shown) is provided, concrete is cast, and the upper structure 7 is built, and as shown in FIG. 1, FIG. 2 or FIG. Finish installing the device. After the entire load of the upper structure 7 shown in FIG. 10 is borne by the slide-type elastic bearing device having the left and right slide surfaces A, the elastic bearing device of the present invention is retrofitted, and the connecting concrete immediately above the elastic bearing device is attached. Only a small load (which can be treated as almost no load) with a small driving load should be borne.

In the case of the above embodiment, the upper support member 8 is provided on both sides of the upper support member 8 in the direction perpendicular to the bridge axis with an inverted L-shaped member made of steel, and the upper engagement member 56 for restricting the movement in the direction perpendicular to the bridge axis.
Of the lower support member 9
Then, at an interval in the direction perpendicular to the bridge axis, the upper engagement member 56 for movement restriction
A steel support member (side block) 66 for restraining the movement in the direction perpendicular to the bridge axis is fixed by welding. Therefore, the elastic bearing member 4 is configured so that the shear deformation in the direction perpendicular to the bridge axis is restrained and the elastic bearing body 4 elastically resists in the bridge axis direction.

In the case of the above-described embodiment, when the elastic support 4 with the connecting and locking projection and the upper support member 8 are formed in a similar plane circular shape, a steel support member 67 is attached to the lower support member 8 in advance. Even if it is arranged so that its upper surface height is located at the level of the height of the upper support member 8,
The screwing operation of the upper support member 8 can be easily performed without interfering with the screwing operation of the upper supporting member 8.

If the elastic support 4 with the connecting and locking projections and the upper support member 8 are formed in a similar circular shape in the plane as in the case of the above-described embodiment, the entire support device becomes compact, and the device is transported. The work is facilitated, and the assembling and installation work for each part can be easily performed.

FIG. 12 shows an elastic bearing device for a bridge according to a second embodiment of the present invention, and FIGS. 13 (a) and 13 (b).
FIG. 14 shows an upper female screw member 13 having a rotary tool engaging recess 68 and a lower steel support member 14 used in the second embodiment of the present invention, and FIGS. 14 and 15 show the present invention. FIG. 9 shows an elastic bearing 4 with a concave portion for connection and locking used in the second embodiment of the present invention. In this embodiment, a connecting and locking means between the upper steel plate 2 and the upper support member 8 and a lower steel plate The configuration of the connecting and locking means of the lower support member 9 and 3 is different from that of the above embodiment,
Other configurations are the same as those of the above-described embodiment, and therefore the differences will be mainly described, and the same portions will be described.
The same reference numerals are given and the description is omitted.

In the case of the second embodiment, an elastic bearing 4 integrally provided with an upper steel plate 2 and a lower steel plate 3 is provided with a female screw portion 60 at the upper central portion of the upper steel plate 2 for connection and locking. A concave portion 10 is provided, and a lower connection locking concave portion 1 having a female screw portion 61 in the lower central portion of the lower steel plate 3.
1 is provided to form an elastic bearing 4 with a concave portion for connection and locking.

A female screw hole on the lower surface side of the lower steel plate 3 in the elastic bearing member 4 with the concave portion for connecting and locking, that is, a lower connecting and locking concave portion 11 having a female screw portion 58 having a female screw hole having a relatively large diameter, In a state in which the lower male screw member 14 also serving as a lateral shear resistance member shown in FIG. 13 is screwed and fixed, the entire elastic support body 4 with the concave portion for connection and locking is rotated in one direction so as to be pushed in a substantially horizontal state. The male screw member 14 is screwed into the connection locking recess 13 having a female screw portion 59 formed of a female screw hole formed on the upper surface of the steel lower support member 9, and the elastic bearing body with the connection locking recess is provided. 4 is mounted in a state of being pressed against a steel lower support member 9.

A female screw portion 59 comprising a female screw hole provided at the center of the upper steel plate 2 in the elastic bearing member 4a.
An upper male screw member 13 also serving as a lateral shear resistance member is screwed and fixed to the upper connection locking concave portion 10 provided with the upper male screw member 13 so that the upper male screw member 13 is pushed in a substantially horizontal state with the upper support member 8 in contact with the upper male screw member 13. While being rotated, the lower surface of the upper support member 8 is screwed and connected to the upper surface of the upper steel plate 2 while being pressed, but the other configuration is the same as that of the above-described embodiment.

In this embodiment, as in the case of the first embodiment, when the upper support member 8 and the elastic support body 4 with the concave portion for connection and locking are formed in a similar circular shape, the elastic support device can be used. The transport and installation work of the elastic support 4a and the upper support member 8 can be easily performed. Further, the elastic bearing device of this embodiment is directly used as the first
As described in the embodiment, the elastic bearing device 6 is used together with the elastic bearing device 65 for supporting a bridge load.
The bridge is slidably supported by 5 and is used as an elastic bearing device for bridges as an uplift force in the event of an earthquake and an elastic resistance bearing device in the lateral direction (bridge axis direction) in an unloaded state where the load on the superstructure is not loaded. can do.

When the elastic bearing device of the present invention is used, the elastic bearing member 4a is connected to the lower support member 9 and latched to the lower structure 17, and the elastic bearing member 4a is connected to the upper support member. 8, a concrete upper structure 7 is built with the elastic layer 1 subjected to preliminary shear deformation in the bridge axis direction, and the upper structure 7 is contracted and creeped by introducing prestress into the upper structure 7. In addition, due to the drying and shrinkage of the upper structure 7, the elastic bearing 4 of the elastic bearing device
It is preferable that a is sheared in the preliminary shearing deformation releasing direction to return to a neutral state with almost no shearing deformation.

In practicing the present invention, when the connecting and locking projections 5 and 6 having male threads are provided at the upper central portion of the upper steel plate 2 or the lower central portion of the lower steel plate 3, A through hole or a female screw hole is provided in the upper central portion of the lower steel plate 3 or the lower central portion of the lower steel plate 3, and the base side of the connection locking projections 5, 6 provided with the male screw portion is fitted into the through hole or the female screw hole. It may be screwed together and fixed to the through-hole or the female screw hole by welding the peripheral edge of the base-side lower surface of the connection locking projections 5 and 6. Further, since the screw direction of the male screw portion in each of the above embodiments can be unified into a right-handed screw or unified into a left-handed screw and the members can be rotated in one direction when they are sequentially connected, the mounting operation is easy. It is. Further, in the above embodiment, the upper structure 3 made of concrete is shown, but the upper structure 3 may be made of steel.

[0027]

According to the present invention, the upper steel plate 2 or the lower steel plate 3 in the elastic bearing 4 having the upper steel plate 2 and the lower steel plate 3 integrally provided above and below the elastic layer 1, respectively.
Are provided at the central portion thereof and serve as one shear-resisting member, respectively, or one connecting-locking protrusion or one male screw serving as a shear-resisting member provided to be screwed to the central portion thereof. The members allow the upper and lower portions of the elastic bearing member 4 to be integrally connected to the upper support member fixed to the upper structure and the upper support member fixed to the lower structure, respectively, by a simple structure. Each one of the connection locking projections or the male screw member also serving as a member can be given two functions of a function as a transverse shear force transmitting member and a function as an upward lift resistance member during an earthquake. A) The upper steel plate 2 and the lower steel plate 3
In addition, there is no need to use four steel plates, the upper and lower support members and the connecting steel plate, and it is not necessary to provide a large number of small-diameter bolt insertion through holes and female screw holes.

As in the prior art (B), there is no need to provide a locking portion for the steel L-shaped hook on the upper support member in addition to the use of the shear resistance member. It is not necessary to provide a large number of small-diameter bolt penetration holes and female screw holes, so an elastic bearing device for bridge load bearing or a bridge elastic bearing device that can be used as a bearing device for lifting force and horizontal shear deformation elastic resistance. There are effects such as the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal front view showing a state in which an elastic bearing device for bridge support according to a first embodiment of the present invention is used.

FIG. 2 is a partially longitudinal side view of FIG.

FIG. 3 is a front view showing an elastic bearing body with a connection locking projection used in the first embodiment of the present invention.

FIG. 4 is a partial longitudinal front view of FIG. 3;

FIG. 5 is a plan view of FIG. 3;

FIG. 6 is a plan view of an upper support member used in the first embodiment of the present invention.

FIG. 7 is a vertical sectional front view of FIG. 6;

FIG. 8 is a plan view of a lower support member used in the first embodiment of the present invention.

FIG. 9 is a vertical sectional front view of FIG. 8;

FIG. 10 is a partially longitudinal front view showing a state where the elastic bearing device of the present invention is used in a no-load state in which no load is imposed on the upper structure.

11 is a partial longitudinal side view of the elastic bearing device used in the no-load state in FIG.

FIG. 12 is a partially longitudinal front view showing a state in which an elastic bearing device for bridge support according to a second embodiment of the present invention is used.

13A and 13B show upper and lower male screw members, wherein FIG. 13A is a plan view, and FIG. 13B is a partially longitudinal side view.

FIG. 14 is a longitudinal sectional front view showing a resilient support body having a concave portion for connection and lock used in a second embodiment of the present invention.

FIG. 15 is a plan view of FIG.

FIG. 16 is a longitudinal sectional front view showing an example of a conventional elastic bearing device.

FIG. 17 is a longitudinal sectional front view showing another example of a conventional elastic bearing body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elastic layer 2 Upper steel plate 3 Lower steel plate 4 Elastic bearing 5 Upper connection locking projection provided with male screw part 6 Lower connection locking projection provided with male screw part 7 Upper structure 8 Steel upper support member 9 Lower support Member 10 Connection locking concave portion provided with female screw portion 11 Connection locking concave portion provided with female screw portion 12 Connection locking concave portion provided with female screw portion 13 Male screw member 14 Male screw member 15 Male screw portion 16 Male screw portion 17 Lower structure DESCRIPTION OF SYMBOLS 18 Upper support member 19 Lower connection steel plate 20 Upper connection steel plate 21 Small diameter female screw hole 22 Stepped small diameter through hole 23 Small diameter connection bolt 24 Small diameter through hole 25 Small diameter female screw hole for bolt screwing 26 Small diameter connection bolt 27 Locking recess 28 Lock Recess for shear 29 shear resistance member 30 small diameter female screw hole 31 stepped small diameter through hole 32 small diameter connection bolt 33 lower support member 34 small diameter through hole for bolt insertion 3 Small diameter female screw hole 36 Small diameter connection bolt 37 Locking recess 38 Locking recess 39 Lateral shear resistance member 40 Locking protrusion 41 Locking protrusion 42 Side block 43 Locking step 44 Steel L-shaped hook 45 Rectangular steel plate 46 Female screw hole 47 Lid material 48 Anchor bolt insertion through hole 49 Anchor bolt 50 Nut 51 Circular steel plate 52 Female screw hole 53 Lid material 54 Anchor bolt 55 Concrete 56 Movement restriction upper engaging member 58 Female screw portion 59 Female screw portion 60 Male thread part 61 Female thread part 65 Elastic bearing device 66 Steel bearing member (side block) 67 Arc-shaped inner peripheral surface

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hideo Naino 2-13-9 Shinkawa, Chuo-ku, Tokyo F-term in Kaimon Co., Ltd. 2D059 AA37 GG59

Claims (3)

[Claims] 1. An upper connection locking projection having a male screw portion at an upper central portion of an upper steel plate of an elastic bearing body integrally provided with an upper steel plate and a lower steel plate at an upper portion and a lower portion of an elastic layer, respectively, faces upward. A lower connection locking projection having a male screw portion is provided at a lower central portion of the lower steel plate so as to project downward, and is a steel upper support member fixed to an upper structure. Is mounted on the upper steel plate and screwed to the upper connection locking projection of the upper steel plate,
The lower steel plate is placed on a lower support member fixed to the lower structure, and the lower connection locking protrusions of the lower steel plate are screwed and connected to each other. An elastic bearing device for a bridge, characterized in that it is a member that transmits both force and upward lift during an earthquake. 2. An upper connecting and locking recess having a female screw portion is provided at an upper central portion of the upper steel plate in an elastic bearing body integrally provided with an upper steel plate and a lower steel plate at an upper portion and a lower portion of an elastic layer, respectively. A lower connecting and locking recess provided with a female thread in a lower central portion of the lower steel plate, and a connecting member having a female thread in a lower central portion of a steel upper support member fixed to the upper structure. A stopping recess is provided, and the steel upper support member is placed on the upper steel plate, and a screw is formed over the upper connection locking recess of the upper steel plate and the connection locking recess of the steel upper support member. A coupling locking concave portion provided with a female screw portion is provided at an upper central portion of a lower support member that is screwed and connected by the combined male screw member and fixed to the lower structure, and the lower steel plate is provided on the lower support member. And the lower steel A male screw member screwed over the connection-locking recess of the plate and the connection-locking recess of the steel lower support member is screwed and connected, and each of the male screw members is subjected to a lateral shear force and an upward lift force during an earthquake. Characterized in that it is a member that transmits both of them. 3. An elastic bearing device arranged together with a bearing device for supporting a load of an upper structure disposed between an upper structure and a lower structure, wherein the elastic bearing device is arranged in a no-load state so as not to bear the load of the upper structure. The elastic bearing device for a bridge according to claim 1 or 2, wherein: