JP2001049744A - Expansion joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expansion joint having a large effective telescoping amount relative to a natural length. SOLUTION: This expansion joint comprises at least a joint main body 1 and a tabular mounting material 2 disposed on the upper side of the joint main body 1. The joint main body 1 further comprises a sliding plate 10, a plurality of load support members 11 placed on the sliding plate 10 in parallel with each other and corrugated in plan view, and elastic deformation members 12 disposed between the load support members 11 and 11 adjacent to each other. When a force acts in a direction that the load support members 11 and 11 are moved closely to each other, one side projected part 11a of the load support members 11 and 11 adjacent to each other is fitted into the other side recessed part 11b against an elastic returning force of the elastic deformation member 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting a building (hereinafter referred to as a seismic isolated building) in which seismic measures are taken by a seismic isolation device to the ground such as a road, and particularly to this structure. It relates to the expansion joint used.

[0002]

2. Description of the Related Art As a structure for connecting a base-isolated building and the ground, for example, there is a structure as shown in FIG.

In this structure, as shown in FIG. 17, a base-isolated building A and a ground B are connected via an expansion joint J.
As shown in the figure, a load supporting member 90 having an X-shape in a front view is shown.
a, and a joint main body 90 formed by alternately arranging an arc-shaped spring member 90b in a front view, a rubber covering material 91 disposed above the joint main body 90, and the joint main body 90 and the covering material 91. And a hard top plate 92 interposed therebetween.

As shown in FIG. 17, the joint J is attached to one end of the surface material 91 on the seismic isolation structure A side and the other end to the ground B side. Attach only one end to the seismic isolation structure A side,
Further, the joint body 90 is installed so as to be received on the step-down surface b2 of the ground B.

In this structure, when the seismic isolation building A rolls due to the earthquake, the spring member 90b between the load supporting members 90a, 90a is elastically compressed and deformed, and the seismic isolation building A moves closer to the ground B. Absorb.

[0006] However, in the expansion employed in this structure, the spring member 90 in the joint main body 90 is provided.
Due to the shape of b, the arrangement between the joint bodies 90, 90, and the shape of the load supporting member 90a, the effective expansion and contraction amount with respect to the natural length (the length when no external force is applied) is small. There was a problem.

[0007]

Accordingly, an object of the present invention is to provide an expansion joint having a large effective expansion and contraction amount with respect to a natural length.

[0008]

Means for Solving the Problems (Invention of Claim 1)
The invention according to claim 1 has at least a joint main body 1.
And an expansion joint comprising a plate-shaped surface material 2 disposed above the joint main body 1. The joint main body 1 is composed of a sliding plate 10 and a high-rigidity plate material A plurality of top-view wave-shaped load supporting members 11 placed in parallel on the upper side, and adjacent load supporting members
An elastic deformation member 12 is provided between the elastic members 11 and 11, and when a force acts in a direction in which the load supporting members 11 and 11 approach each other, the elastic deformation member 12 resists the elastic return force. Then, the convex portion 11a on one side of the adjacent load supporting members 11, 11
Are fitted into the recess 11b on the other side. (Invention according to claim 2) The invention according to claim 2 relates to the invention according to claim 1, wherein the elastic deformation member 12 includes a convex portion 11a.
The leaf springs are fixed to the concave portions 11a when the load supporting members 11, 11 approach each other.
And is elastically deformed by being pushed by the plate surface. (Invention of Claim 3) The invention of Claim 3 relates to the invention of Claim 1, wherein the elastic deformation member 12 is made of an elastomer filled between the load support members 11, 11. . (Invention of Claim 4) The invention of Claim 4 relates to the invention of any of Claims 1 to 3, wherein a top plate 3 is interposed between the joint main body 1 and the surface material 2. .

The function of the expansion joint of the present invention will be described in detail in the following embodiments of the present invention.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings showing embodiments. (Embodiment 1) FIG. 1 shows a structure in which a base-isolated building A and a ground B are connected via an expansion joint J.

[0011] As shown in FIGS.
The projecting part a on the side of the earthquake building A is reciprocally connected to the cutout part b on the ground B side
Penetration without interference, stepped surface a1 of the protruding portion a
And the vertical wall b3 and the step-down surfaces b1 and b2 of the tip a2 and the cutout b
Expansion joint in the space formed by
J is installed. In addition, in FIG.
Is a seismic isolation device to give a building a seismic isolation function.
This seismic isolation device basically exchanges steel and rubber plates.
They are configured to be stacked and fixed to each other. less than,
The members that make up the above expansion joint J
Will be described in detail. [Overall configuration of expansion joint J] Expert
2 and 3 as shown in FIGS.
The joint main body 1 and the joint main body 1 are disposed above the joint main body 1.
Plate-like surface material 2, joint body 1 and surface material 2
And the top plate 3 interposed therebetween.[Configuration of the joint body 1] The joint main body 1 is shown in FIG.
As shown in FIG. 8 and FIG. 8, the sliding plate 10 fixed to the step-down surface b2.
And a plurality of top-view waves placed in parallel on the slide plate 10
Load supporting member 11 and adjacent load supporting members 11, 11 phase
And an elastic deformation member 12 arranged between them.
A force was applied in the direction in which the load support members 11, 11 approached each other.
Occasionally, adjacent to the elastic return force of the elastic deformation member 12,
Of the load supporting members 11, 11 on one side is
It fits into the part 11b.

The sliding plate 10 is entirely made of a stainless steel plate, and has a plurality of load supporting members as shown in FIG.
A mounting portion 10a on which a rectangular shape 11 is placed;
a and the upright piece 10b formed on the opposite side of FIG. The distance between the inner surfaces of the upright pieces 10b, 10b is set to a dimension substantially coinciding with the length of the load supporting member 11.
By pressing both side edges of the load supporting member 11 with 10b, 10b, the positional displacement of the load supporting members 11, 11 in the longitudinal direction does not occur.

As shown in FIGS. 3 and 6, the load supporting member 11 is made of a thick metal plate having high rigidity such as stainless steel.
a and the concave portions 11b are alternately provided).

As shown in FIG. 4, the elastic deformation member 12 is constituted by a leaf spring riveted to the convex portion 11a of the load supporting member 11, and the leaf spring is connected to the load supporting members 11, 11.
When they approach each other, they are pushed by the surface of the concave portion 11a and elastically deform. [Structure of the Covering Material 2 ] As shown in FIGS. 3 and 5, the covering material 2 includes a long band-shaped main body 20 made of rubber (for example, chloroprene rubber), and thin long holes in upper and lower surfaces of the main body 20. A thin film part 21 formed by providing the same, and mounting brackets 22 buried in both edges of the main body 20.
In the main body 20 corresponding to the long hole 23, a bolt insertion hole 24 is provided.

As shown in FIGS. 2 and 5, both ends of the surface mounting material 2 are placed on the above-mentioned step-down surfaces a1 and b1, and a high nut N embedded in the step-down surfaces a1 and b1 is used. To be fixed.

The positional relationship between the surface material 2 and the top plate 3 in a top view is set so as to be staggered, thereby suppressing the formation of a step between the adjacent surface materials 2 and 2. I have. [Configuration of Top Plate 3 ] As shown in FIG. 6 and FIG.
It is swingably attached to each load support member 11 via the support member 4, and when a force is applied so that the load support members 11, 11 approach each other, the adjacent top plates 3, 3 come into contact with each other. Thereby, the free end 30 side of the top plate 3 is raised. In this embodiment, as a means for raising the free end 30 side of the top 3, the free side end of the top 3 and the supporting side end of the top 3 adjacent thereto as shown in FIG. An inclined surface is used, and both inclined surfaces are brought into contact with each other. [Structure of Support Tool 4 ] As shown in FIGS. 6 and 7, the support tool 4 has a U-shaped support member 40 attached or fixed to the load support member 11, and a support member 40 attached or fixed to the top plate 3. Section L
And a support member 41 having a V-shape. The support member 41 is inserted into an insertion hole 42 formed by the load support member 11 and the support member 40.
The top plate 3 is attached to the load supporting member 11 in such a manner that the top 41 is inserted. [Function of this expansion joint J] When an earthquake has not occurred In this state, an elastically deformable member composed of a leaf spring is used.
12, a slight pressurization is applied. As shown in FIGS. 2, 8, and 9, an expansion joint J is provided between the tip a2 of the protrusion a and the vertical wall b3 of the cutout b. Is installed without being able to. When the tip a2 is separated from the vertical wall b3 due to the earthquake In this case, as shown in FIG. 10, a gap is formed between the tip a2 of the protrusion a and the end face of the expansion joint J opposed thereto. . When the tip a2 and the vertical wall b3 approach each other due to the earthquake In this case, as shown in FIG. 11, all the load supporting members 11, 11 are folded against the urging force of the elastic deformation member 12, At the same time, all the top plates 3 are folded as shown in FIG. Therefore, this expansion joint J
Has a very large effective expansion / contraction amount with respect to the natural length as compared with the prior art. Further, there is little possibility that the elastic deformation member 12 is plastically deformed. When the tip a2 and the vertical wall b3 move relative to each other in the direction perpendicular to the width direction due to the earthquake (see FIGS. 13 and 14). Although a frictional force is acting between the sliding plates 10 and a2, the both side edges of all the load supporting members 11 are upright pieces 10b and 10
Since the load supporting members 11 and 11 are pressed down by b, no positional displacement occurs between the load supporting members 11 and 11 in the longitudinal direction. Therefore, no problem occurs when the load supporting member 11 and the top plate 3 are folded. [This expansion joint is excellent
Point] By stacking all of the load supporting members 11, it is possible to carry them in a low bulk state. Since the joint main body 1 can be formed only by arranging the plurality of load supporting members 11 in parallel, the construction time is short. Since the elastic deformation member 12 is formed of a leaf spring,
Low cost. Since the direction in which the leaf spring is deformed is set in the direction of the arrow in FIG. 4, the joint main body 1 does not rise from the step-down surface b2 even when a compressive force is applied. (Other Embodiments) In order to prevent the load supporting member 11 on the distal end portion a2 from falling down when the distal end portion a2 and the vertical wall b3 are separated by an earthquake, as shown in FIG. It is preferable that the angle AG is attached or fixed to the support member 11, while it is preferable that the wire W is penetrated and integrated with all or a part of the load support member 11, as shown in FIG.

Further, instead of the above embodiment, the elastic deformation member 12 may be made of an elastomer, and the elastomer may be interposed between the load supporting members 11, 11.

[0018]

The present invention has the following effects since it has the above-described configuration.

As is clear from the description of the embodiment of the present invention, an expansion joint having a large effective expansion and contraction amount with respect to the natural length can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a structure in which a base-isolated building and the ground are connected by an expansion joint according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a perspective view of the expansion joint.

FIG. 4 is a perspective view showing a state in which an elastic deformation member is attached to a load supporting member of the expansion joint.

FIG. 5 is a cross-sectional view of a surface material of the expansion joint.

FIG. 6 is a top view of a joint main body, a top plate and the like of the expansion joint.

FIG. 7 is a front view showing a state where a top plate is attached to the load supporting member.

FIG. 8 is a perspective view showing a state of the load supporting member when no earthquake occurs.

FIG. 9 is a perspective view showing a state of the top plate when no earthquake occurs.

FIG. 10 is a perspective view showing a state mainly of the joint when the distal end portion of the protruding portion and the vertical wall of the cutout portion are separated by an earthquake.

FIG. 11 is a perspective view showing a state of the load supporting member when the distance between the tip of the protruding portion and the vertical wall of the cutout portion approaches due to an earthquake.

FIG. 12 is a perspective view showing a state of a top plate when a space between a tip end portion of a protruding portion and a vertical wall of an excavation portion approaches due to an earthquake.

FIG. 13 is a perspective view showing a state of the load supporting member when the tip of the protruding portion and the vertical wall of the cutout portion relatively move in a direction perpendicular to the width direction due to the earthquake.

FIG. 14 is a perspective view showing a state of the top plate when the tip of the protruding portion and the vertical wall of the cutout portion relatively move in a direction perpendicular to the width direction due to an earthquake.

FIG. 15 is a sectional view of another embodiment of the joint main body.

FIG. 16 is a sectional view of another embodiment of the joint main body.

FIG. 17 is a cross-sectional view of a prior art expansion joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint main body 2 Exterior material 3 Top plate 10 Sliding plate 11 Load support member 11a Convex part 11b Concave part 12 Elastic deformation member

Continued on the front page (72) Inventor Yukio Kamifune 172 Ikezawa-cho, Yamatokoriyama-shi, Nara Pref.

Claims (4)

[Claims] 1. An expansion joint comprising at least a joint main body (1) and a plate-like covering material (2) arranged above the joint main body (1), wherein the joint main body (1) is A sliding plate (10), a plurality of load supporting members (11) formed of a high-rigidity plate material and placed in parallel on the sliding plate (10), and having a wave shape in a top view.
An elastic deformation member (12) disposed between the adjacent load supporting members (11) and (11), wherein a force acts in a direction in which the load supporting members (11) and (11) approach each other. Then, the convex portion (11a) on one side of the adjacent load supporting members (11) fits into the concave portion (11b) on the other side against the elastic restoring force of the elastic deformation member (12). An expansion joint characterized by the following. 2. The elastically deformable member (12) is formed by a leaf spring fixed to a projection (11a), and the leaf spring is recessed when the load supporting members (11) and (11) approach each other. The expansion joint according to claim 1, wherein the expansion joint is elastically deformed by being pressed against the plate surface of (11a). 3. The expansion joint according to claim 1, wherein the elastic deformation member is made of an elastomer filled between the load supporting members. 4. The expansion joint according to claim 1, wherein a top plate (3) is interposed between the joint body (1) and the facing material (2).