JP2008297788A - Expansion joint cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansion joint cover having a weak possibility of suffering damage even if a base-isolated structure and a non-base-isolated structure relatively move with respect to each other. <P>SOLUTION: The expansion joint cover is formed of a slide floor 11 set on an external wall 110, and a fixed floor 12 cantilevered by the ground 111. The slide floor 11 and the fixed floor 12 cooperatively form a finger joint. The slide floor 11 is formed by arranging slide bars 11a in parallel with each other like a comb, and reinforced by a reinforcing member consisting of reinforcing bars 11c and a reinforcing plate 11b, on a rear side of the slide bars 11a. The slide floor 11 is provided with a sliding means for moving the slide floor 11 in a lengthwise direction of a gap 113. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an expansion joint cover installed to close a gap around a seismic isolation structure.

  When installing a base-isolated structure such as a base-isolated building, in order to avoid interference between the base-isolated structure and the non-base-isolated structure during an earthquake, the space between the base-isolated structure and the non-base-isolated structure Is provided with a gap. This gap is shielded by a floor member of an expansion joint cover provided around the building so as not to obstruct traffic.

  However, since the base isolation structure and the non-base isolation structure move relative to each other during an earthquake, the expansion joint cover may be damaged. For this reason, an expansion joint cover using finger joints has been proposed so as to be able to flexibly cope with the relative motion between the base isolation structure and the non-base isolation structure during an earthquake (Patent Document 1). In this expansion joint cover, as shown in FIGS. 13 and 14, a large number of fixing bars 91 are arranged in a comb shape in the width direction of the gap 92 between the base isolation structure 101 and the non-base isolation structure 102. A fixed floor 93 and a slide floor 95 in which a plurality of slide bars 94 are arranged in parallel in a comb shape so as to mesh with the fixed floor 93. The fixed floor 93 and the slide floor 95 are provided. A finger joint 96 is formed. Further, as shown in FIG. 15, rollers 97a, 97b, 97c, and 97d are attached to one end of the structure 101 on the back side of the slide floor 95 at predetermined intervals, and the slide floor 95 is shown in FIG. It can be moved in the Y direction.

  This expansion joint cover is formed by a finger joint 96 composed of a fixed floor 93 and a slide floor 95 when the base isolation structure and the non-base isolation structure are relatively moved in the gap width direction (X direction in FIG. 13). Interference between the fixed floor 93 and the slide floor 95 can be prevented. When the base isolation structure and the non-base isolation structure move relative to each other in the gap length direction (Y direction in FIG. 13), the rollers 97a, 97b, 97c, and 97d roll on the structure 101 and slide. The floor 95 moves on the structure 101. Thus, the slide floor 95 can be prevented from interfering with the fixed floor 93.

Japanese Patent Laid-Open No. 11-100907

  However, in the expansion joint cover of Patent Document 1, since the slide bar 94 is simply cantilevered at the end on the structure 101 side, the base-isolated structure 101 and the non-base-isolated structure 102 are spaced from each other. When the relative movement is performed in the length direction (Y direction in FIG. 13), the slide bar 94 is pushed in the Y direction by the fixing bar 93 and may be bent and damaged. In particular, in the state where the slide floor 95 is moved in the direction of being pulled out from the fixed floor 93, when the relative movement is performed in the Y direction in FIG. 13, the distance from the fulcrum that fixes the slide bar 94 to the force point becomes long, There is a risk of deformation due to a large moment of force.

  The present invention has been made in view of the above-described conventional situation and the like, and provides an expansion joint cover that is less likely to be damaged even if the base isolation structure and the non-base isolation structure move relative to each other during an earthquake. This is a problem to be solved.

  The inventor considered to reinforce the slide bar in order to solve the above-described problems in the expansion joint cover described in Patent Document 1. However, when a reinforcing member for reinforcing the slide floor is provided on the back side of the slide floor, the reinforcement member and the fixed floor interfere with each other and are damaged when the slide floor and the fixed floor approach each other during an earthquake. For this reason, even if a reinforcing material is provided on the back side of the slide floor, a study was made on a structure in which the reinforcing material and the fixed floor do not interfere with each other during an earthquake. As a result, the above problem can be solved if the fixed floor is fixed on the non-seismic isolation side while leaving a space below, a space is provided below the fixed floor, and a reinforcing material for the slide floor is inserted into the space. The present invention has been completed.

That is, the expansion joint cover of the present invention is an expansion joint cover for closing the gap between the base isolation structure and the non-base isolation structure,
A plurality of slide bars arranged in a comb shape on the side of the seismic isolation structure, and a plurality of fixed bars arranged in a comb shape in the width direction of the gap open a space below the non-exempt. The fixed floor fixed to the seismic structure forms a finger joint,
A reinforcing member for preventing deformation of the slide bar is provided on the back side of the slide floor so as to be inserted under the fixed floor,
A slide means is provided at an end of the slide floor on the seismic isolation structure side so that the slide floor can be moved in the length direction of the gap.

In the expansion joint cover according to the first aspect of the present invention, the slide bar of the slide floor is inserted into the gap between the fixed bars of the fixed floor, thereby forming a finger joint. For this reason, even if the gap between the base isolation structure and the non-base isolation structure expands and contracts in the width direction due to the earthquake motion, the fixed floor and the slide floor do not interfere with each other.
In addition, slide means is provided at the end of the slide floor on the seismic isolation structure side so that the slide floor can be moved in the length direction of the gap between the seismic isolation structure and the non-base isolation structure. For this reason, when the seismic isolation structure and non-base isolation structure expand and contract in the length direction of the gap due to seismic motion, the slide bar on the slide floor receives a force in the length direction of the gap from the fixed bar on the fixed floor. The slide floor moves with the fixed floor by means. For this reason, deformation of the slide bar and the fixed bar due to interference between the slide bar and the fixed bar is prevented.
In addition, a reinforcing member that prevents deformation of the slide bar is provided on the back side of the sliding floor, and the reinforcing member can be inserted under the fixed floor, so that the sliding floor and the fixed floor approach each other during an earthquake. However, the reinforcing member and the fixed floor do not interfere with each other. For this reason, the slide floor is reinforced by the reinforcing member even during an earthquake.

  Therefore, according to the expansion joint cover of the present invention, even if the base-isolated structure and the non-base-isolated structure move relative to each other during an earthquake, the possibility of breakage is reduced.

  In the expansion joint cover of the second aspect of the present invention, the reinforcing member is passed in the width direction on the back side of the slide floor, and a large number of slide bars are connected and fixed. In this case, the force applied to the slide bar is also shared by the reinforcing member, and deformation of the slide bar can be prevented.

In the expansion joint cover of the third aspect of the present invention, on the non-seismic isolation structure on the lower side of the fixed floor, a receiving rail is provided that extends and is fixed in the length direction of the fixed bar. On the back side of the slide floor, there is provided a slide member that extends and is fixed to a position facing the receiving rail and is slidable on the receiving rail.
In this case, the slide floor can move in the width direction of the gap on the non-base-isolated structure. In addition, even if a large load is applied by a person or vehicle passing over the slide bar on the slide floor, the slide member fixed to the back side of the slide bar and the receiving rail fixed to the non-seismic isolation structure The load can be supported. For this reason, it is not necessary to increase the strength of the slide bar on the slide floor, the width and height of the slide bar can be reduced, and the manufacturing cost can be reduced.

  Moreover, it can be set as the structure which attached the roller to the back side of the slide floor instead of the combination of a slide member and a receiving rail. Even in such a structure, the roller rotates on the non-isolated structure, and the slide floor can move on the non-isolated structure in the width direction of the gap.

  In the expansion joint cover according to the fourth aspect of the present invention, a gap is provided between the slide member and the slide bar. When one slide member is fixed on a plurality of slide bars, there is no escape space for dust that has fallen into the gaps between the slide bars, making it difficult to eliminate. On the other hand, if a gap is provided between the slide member and the slide bar, dust that has fallen on the slide member can be removed from the gap. For this reason, it is easy to remove dust that has fallen between the slide bars.

In the expansion joint cover according to the fifth aspect of the present invention, the receiving rail is provided so as to protrude from the non-seismic isolation structure side to the gap side.
In this way, even if the gap between the base-isolated structure and the non-base-isolated structure is long, the slide floor can be supported by the receiving rail protruding toward the gap side. Even if it is longer than the movable range, the length of the slide floor can be made shorter than the width of the gap. Further, the receiving rail supporting the slide floor becomes longer by the amount protruding from the non-seismic isolation structure side to the gap side, and the mechanical strength can be increased. For this reason, the strength of the slide bar on the slide floor can be further reduced, the width and height of the slide bar can be further reduced, and the manufacturing cost can be further reduced.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.
Example 1
The expansion joint cover of Example 1 is installed in order to block the gap 113 between the outer wall 110 of the base isolation structure and the ground 111 which is a non-base isolation structure, as shown in FIGS. 1 and 2. There is a slide floor 11 installed on the outer wall 110 side and a fixed floor 12 fixed on the ground 111 side.

  As shown in FIG. 3, the slide floor 11 has slide bars 11a made of elongated strip-shaped steel arranged in a comb shape. On the back side of the slide bar 11a, a reinforcing plate 11b is welded in the width direction on the front end side. Further, a strip-shaped reinforcing bar 11c in the width direction is positioned near the rear end on the back side of the slide bar 11a. It is welded to. The reinforcing plate 11b and the reinforcing plate 11c are reinforcing members. As shown in FIGS. 1 and 2, an elongated strip-shaped reinforcing plate 11d is welded to one end on the outer wall 110 side of the slide bar 11a at a position facing the outer wall 110, and further, the slide bar 11a. A slide member 11e made of square material having a square cross section is welded to the lower side of one end on the outer wall 110 side. A receiving rail 11f having a groove opening upward is fixed to the outer wall 110 at a position aligned with the sliding member 11e, and the sliding member 11e is accommodated in the receiving rail 11f in the Y direction shown in FIG. It is possible to slide.

  On the other hand, as shown in FIGS. 1 and 2, the fixed floor 12 has a fixed bar 12 a made of elongated strip-shaped steel arranged in a comb shape, and is slightly above the rectangular recess 111 a provided on the ground 111. Is cantilevered to the ground 111 side across the space. As shown in FIG. 4, a steel fixing plate 12b is welded in the width direction at the rear end of the fixing bar 12a. Further, the fixing bar 12a is connected to the ground 111 below the rear end of the fixing bar 12a. The fixing member 13 for fixing to is welded. The fixing member 13 is provided with a convex portion 13a protruding in the length direction of the fixing bar 12a, and the convex portion 13a is provided with a plurality of holes 13b at a predetermined interval. Moreover, as shown in FIG. 1, the L-shaped metal fitting 14 is attached to the position aligned with the convex portion 13a of the ground 111. The fixed floor 12 is fixed to the ground 11.

  In addition, a rectangular recess 111a formed in the ground 111 has a predetermined shape so that steel rails 15a and 15b extend in the width direction in parallel to each other at a position facing the reinforcing plate 11b of the slide floor 11. Fixed at intervals.

Next, the effect of the expansion joint cover of Example 1 at the time of an earthquake is demonstrated.
In the event of an earthquake, when the outer wall 110 and the ground 111 approach each other due to earthquake motion, the rear end of the slide floor 11 in the state of FIG. Thereby, the reinforcement board 11b which has fixed the slide bar 11a slides on the rails 15a and 15b, and the slide floor 11 approaches the direction of the ground 111. As a result, the slide floor 11 penetrates deeply in the length direction of the fixed floor 12 and becomes the state shown in FIG.
Further, when the outer wall 110 and the ground 111 are separated by the earthquake motion, the slide member 11e welded to the rear end of the slide floor 11 is pushed toward the outer wall 110 from the receiving rail 11f. Thereby, the reinforcing plate 11b fixing the slide bar 11a slides on the rails 15a and 15b, and the slide floor 11 moves in a direction away from the ground 111. As a result, the slide floor 11 that has penetrated deeply in the length direction of the fixed floor 12 moves in the direction of being pulled out, and the state shown in FIG. 5C is obtained.
As described above, the expansion joint cover of Example 1 can be expanded and contracted in the X direction in FIG.

On the other hand, when the outer wall 110 and the ground 111 move relative to each other in the Y direction in FIG. 1 due to seismic motion, the slide member 11e slides on the receiving rail 11f in the Y direction shown in FIG. The positional relationship between and does not change. At this time, the tip of the slide floor 11 receives a moment of force in the Y direction from the fixed floor 12, but on the back side of the slide bar 11a of the slide floor 11, as shown in FIG. Since the bar 11c is welded and reinforced, even if it receives a moment of force in the Y direction from the fixed floor 12, it is difficult to deform.
Thus, the expansion joint cover of Example 1 can be expanded and contracted in the Y direction in FIG.

  As described above, in the expansion joint cover of Example 1, even if the seismic isolation structure and the non-base isolation structure are moved relative to each other in the X direction or the Y direction due to the earthquake motion, the slide floor 11 is moved and is damaged. Can escape. Moreover, since the slide floor 11 is reinforced with the reinforcing material which consists of the reinforcement board 11b and the reinforcement bar 11c, it is hard to damage.

(Example 2)
The expansion joint cover of Example 2 is shown in FIGS. Like the expansion joint cover of Example 1, this expansion joint cover includes a slide floor 21 installed on the outer wall 110 side and a fixed floor 12 fixed on the ground 111 side. As shown in FIG. 8, slide bars 21a made of elongated strip-shaped steel are juxtaposed in a comb shape. Under the slide bar 21a, a plurality of slide members 25 made of a steel square member having a U-shaped cross section that opens downward are welded at predetermined intervals in the length direction. Further, two rows of reinforcing bars 26a and 26b are welded to the slide bar 21a in a direction perpendicular to the slide member 25. The slide member 25 and the reinforcing bars 26a and 26b are reinforcing members. Further, as shown in FIG. 6, an elongated strip-shaped reinforcing plate 21 d is welded to the rear end of the slide bar 21 a at a position facing the outer wall 110. Further, below the rear end of the slide bar 21a, slide means similar to that of the first embodiment is provided. The same components relating to the sliding means are denoted by the same reference numerals and description thereof is omitted.

  The fixed floor 12 is also the same as that of the first embodiment, and the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  Further, as shown in FIG. 7, a plurality of receiving rails 27 made of steel square material slide in a rectangular recess 111 a formed in the ground 111 at a position facing the slide member 25 of the slide floor 21. The bar 21a extends in the length direction and is fixed.

Next, the effect of the expansion joint cover of Example 2 during an earthquake will be described.
In the event of an earthquake, when the outer wall 110 and the ground 111 approach each other due to earthquake motion, the rear end of the slide floor 21 in the state of FIG. Thereby, the slide member 25 slides on the receiving rail 27, and the slide floor 11 moves in a direction approaching the direction of the ground 111. As a result, the end of the slide bar 11a penetrates deeply in the length direction between the fixed bars 12a, resulting in the state shown in FIG. 9B.
Further, when the outer wall 110 and the ground 111 are separated by the earthquake motion, the slide member 11e welded to the rear end of the slide floor 21 is pushed from the receiving rail 11f toward the outer wall 110. Thereby, the slide member 25 slides on the receiving rail 27, and the slide floor 21 moves in a direction away from the ground 111. As a result, the end of the slide bar 21a penetrates deeply in the length direction between the fixed bars 12a, and the state shown in FIG. 9C is obtained.
As described above, the expansion joint cover of Example 2 can be expanded and contracted in the X direction in FIG.

  On the other hand, when the outer wall 110 and the ground 111 move relative to each other in the Y direction in FIG. 1 due to seismic motion, the sliding floor 21e slides on the receiving rail 11f in the Y direction as in the first embodiment, so that the fixed floor 12 The positional relationship between the slide floor 21 and the fixed floor 12 does not change. At this time, the tip of the slide floor 21 receives a moment of force in the Y direction from the fixed floor 12, but on the back side of the slide bar 21a of the slide floor 21, as shown in FIG. Since 26a and 26b are welded to the slide bar 21a and reinforced, it is difficult to be deformed even when a moment of force in the Y direction from the fixed floor 12 is received. Thus, the expansion joint cover of Example 2 can be expanded and contracted also in the Y direction in FIG.

  As described above, even with the expansion joint cover of the second embodiment, even if the outer wall 110 and the ground 111 move relative to each other in the X direction or the Y direction due to the earthquake motion, similarly to the expansion joint cover of the first embodiment, the slide floor 21 remains. By moving, damage can be avoided. Further, the load can be supported by the slide member 25 fixed to the back side of the slide bar 21 a and the receiving rail 27 fixed to the ground 111. For this reason, it is not necessary to increase the strength of the slide bar 21a so much, the width and height of the slide bar 21a can be reduced, and the manufacturing cost can be reduced.

  Further, as shown in FIG. 7, since the receiving rail 27 extends in the length direction of the slide bar 21 a, dust that has fallen on the recess 111 a from between the slide bars 21 a is blocked by the receiving rail 27. Without moving toward the gap 113. For this reason, it is difficult for dust to accumulate on the recess 111a, and it is possible to easily remove the dust by washing the recess 111a.

(Example 3)
As shown in FIG. 10, the expansion joint cover of Example 3 has the reinforcing bars 36 a, 36 b, 36 c of the slide floor 31 extending in the width direction across the slide member 35, and the slide bar 31 a and the slide member 35 are extended. There is a gap between them (FIG. 11). The reinforcing bars 36a, 36b, 36c and the slide member 35 are reinforcing members. About another structure, it is the same as that of the expansion joint cover of Example 2, and attaches | subjects the same code | symbol to the same structure, and abbreviate | omits description.
Description is omitted.

  The expansion joint cover of the third embodiment has the following operational effects in addition to the same operational effects as the expansion joint cover of the second embodiment. That is, as shown in FIG. 11, this expansion joint cover has a gap between the slide bar 31a and the slide member 35, so that the dust 38 that has fallen on the slide member 35 from between the slide bars 31a is removed. It can be excluded from the gap. For this reason, it becomes easier to remove dust that has fallen between the slide bars 31a.

Example 4
In the expansion joint cover of the fourth embodiment, as shown in FIG. 12, a receiving rail 47 fixed to a rectangular recess 111 a formed in the ground 111 protrudes toward the gap 113. Other configurations are the same as those of the expansion joint cover of the third embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

  Since the expansion joint cover can support the slide floor 31 by the receiving rail 47 protruding toward the gap 113, the length of the slide floor 31 can be increased even if the width of the gap 113 is longer than the movable range of the expansion joint cover. The width of the gap 113 can be made shorter. Further, the receiving rail 47 that supports the slide floor 31 becomes longer by the amount protruding from the ground 111 side toward the gap 113 side, and the mechanical strength is further increased. For this reason, the strength of the slide bar 31a of the slide floor 31 can be further reduced, the width and height of the slide bar 31a can be further reduced, and the manufacturing cost can be further reduced.

(Modification of Examples 1-4)
In the above-described Examples 1 to 4, the fixed floor is cantilevered on the ground to form a space for preventing interference with the reinforcing material of the slide floor below the fixed floor. It is good also as a structure which forms a space under a fixed floor by fixing a board to the upper surface of this by welding etc., and fixing the edge part of the board to the ground.

  The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims.

  The movable floor for a seismic isolation structure of the present invention can be used for shielding a groove provided around the seismic isolation structure.

3 is a cross-sectional view of an expansion joint cover of Example 1. FIG. FIG. 4 is a perspective view of a state in which a part of the slide bar is peeled off according to the expansion joint cover of the first embodiment. It is a perspective view of the slide floor of the expansion joint cover of Example 1. FIG. It is a perspective view of the fixed floor of the expansion joint cover of Example 1. FIG. It is sectional drawing which showed the drive state at the time of the earthquake of the expansion joint cover of Example 1. FIG. It is sectional drawing of the expansion joint cover of Example 2. FIG. FIG. 10 is a perspective view of a state in which a part of a slide bar is peeled off in connection with an expansion joint cover of Example 2. FIG. 10 is a perspective view of a state in which a part of a slide bar is peeled off in connection with an expansion joint cover of Example 2. It is sectional drawing which showed the drive state at the time of the earthquake of the expansion joint cover of Example 2. FIG. FIG. 10 is a perspective view of a state in which a part of a slide bar is peeled off according to the expansion joint cover of Example 3. 6 is a partial cross-sectional view of an expansion joint cover of Example 3. FIG. 6 is a cross-sectional view of an expansion joint cover of Example 4. FIG. It is a top view of the conventional expansion joint cover. It is AA arrow sectional drawing in FIG. It is BB arrow sectional drawing in FIG.

Explanation of symbols

110 ... Outer wall (base-isolated structure)
111 ... Ground (non-base-isolated structure)
113 ... Gap 12a, 21a, 31a ... Fixed bar 12, 21, 31 ... Fixed floor 11a, 21a, 31a ... Slide bar 11, 21, 31 ... Slide floor 11c, 11b, 25, 26a, 26b, 36a, 36b, 36c 35 ... reinforcing members (11c, 26a, 36a, 36b, 36c ... reinforcing bars, 11b ... reinforcing plates, 25, 35 ... sliding members)
27, 37, 47 ... receiving rail 11e, 11f ... sliding means (11e ... sliding member, 11f ... receiving rail)

Claims (5)

An expansion joint cover for closing a gap between the base isolation structure and the non-base isolation structure,
A plurality of slide bars arranged in a comb shape on the side of the seismic isolation structure, and a plurality of fixed bars arranged in a comb shape in the width direction of the gap open a space below the non-exempt. The fixed floor fixed to the seismic structure forms a finger joint,
A reinforcing member for preventing deformation of the slide bar is provided on the back side of the slide floor so as to be inserted under the fixed floor,
An expansion joint cover, characterized in that slide means is provided at the end of the slide floor on the seismic isolation structure side so that the slide floor can be moved in the length direction of the gap.   2. The expansion joint cover according to claim 1, wherein the reinforcing member is passed in the width direction on the back side of the slide floor, and a plurality of slide bars are connected and fixed.   On the non-seismic isolation structure below the fixed floor, there is a receiving rail that extends and is fixed in the length direction of the fixed bar. On the back side of the slide floor, a position facing the receiving rail The expansion joint cover according to claim 1, further comprising a slide member that extends and is fixed to the support rail and is slidable on the receiving rail.   The expansion joint cover according to claim 3, wherein a gap is provided between the slide member and the slide bar.   The expansion joint cover according to any one of claims 1 to 4, wherein the receiving rail is provided so as to protrude from the non-seismic isolation structure side to the gap side.

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