JP4673270B2 - Expansion joint cover - Google Patents

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 Are provided with regularly spaced grooves. The groove is shielded by a floor member of an expansion joint cover provided around the building, and the upper surface of the floor member is flush with the periphery so as not to obstruct traffic.

  However, since the seismic isolation structure and non-base isolation structure move relative to each other during earthquakes, the top of the floor member of the expansion joint cover jumps up on the entire surface and the fixed end of the floor member is damaged. Or the raised floor member may interfere with traffic. Various proposals have been made to deal with the movement of the expansion joint cover during such an earthquake.

  For example, Patent Documents 1 to 3 describe a structure in which the tip of the floor member of the expansion joint cover can be rotated by pressing a bolt that fixes the expansion joint cover with a biasing force of a spring. Further, Patent Document 4 proposes an expansion joint cover that uses the elastic force of the floor member of the expansion joint cover so that the tip side can be bent up and down. Further, Patent Document 5 proposes a technique that enables vertical movement by fixing a floor member of an expansion joint cover via a spring. In addition, when the floor member is fixed with bolts, the floor member is fixed with a margin so that it can be moved up and down (Patent Document 6), or a recess is provided on the back surface of the floor member. There is a support member (patent document 7) in which a support member projecting on the side for fixing the support member is inserted into a recess, and the floor member can be turned around a point where the support member contacts the recess.

  In these expansion joint covers, even if the front end side of the floor member moves in the length direction of the floor member due to earthquake motion and rides on the entire surface, the fixed end portion is not damaged.

Japanese Patent Laid-Open No. 10-205090 JP 10-317516 A JP-A-9-96017 Japanese Utility Model Publication No. 58-23909 Japanese Utility Model Publication No. 60-138910 JP 2003-129576 A (paragraph number 0025) JP 2001-329625 A (paragraph number 0012)

  However, in an actual earthquake, not only the gap distance between the base isolation structure and the non-base isolation structure changes, but also the base isolation structure and the base isolation structure may move relative to each other in the lateral direction. . On the other hand, in the conventional expansion joint cover described above, the case where the base isolation structure and the non-base isolation structure move relative to each other in the lateral direction is not taken into consideration. When riding on, there is a risk that the mounting portion of the floor member may be damaged or it may be difficult to return to the original state.

  The present invention has been made in view of the above-described conventional circumstances, and even if the base isolation structure and the non-base isolation structure move in the lateral direction at the time of the earthquake, the mounting portion of the floor member is damaged. Or providing an expansion joint cover that is less likely to come off and be difficult to return to its original state.

The expansion joint cover of the present invention is an expansion joint cover for closing a gap between a seismic isolation structure and a non-base isolation structure,
A floor member installed on the gap; and an attachment means for attaching the floor member to the seismic isolation structure side or the non-base isolation structure side. The attachment means has a tip of the floor member. A bearing mechanism for pivotally supporting the floor member on the fixed end side of the floor member so as to be rotatable in the vertical direction, and a link mechanism for allowing the one end side of the shaft of the bearing mechanism to move up and down are provided. It is characterized by being.

In the expansion joint cover of the present invention, a bearing mechanism that pivotally supports the floor member on the rear end side of the floor member is provided so that the front end of the floor member can be rotated in the vertical direction. As a result, even if the base isolation structure and the non-base isolation structure approach each other at the time of an earthquake and the front end side of the floor member rides on the same surface, the front side of the floor member is rotated by the bearing mechanism and the movement Since it can follow, an attachment means is not damaged.
In addition, a link mechanism that allows the shaft of the bearing mechanism to move up and down when the base isolation structure and the non-base isolation structure move laterally relative to each other and the floor member rides on the horizontal surface in the event of an earthquake. Actuates and lifts one end of the shaft upward. Further, when the floor member riding on the entire surface returns to the original position, the link mechanism operates to lower the one end side of the shaft downward and return to the original position. For this reason, even if the seismic isolation structure and the non-base isolation structure move laterally in the event of an earthquake, the mounting part of the floor member will come off and it will become difficult or damaged. There is little possibility to do.

  The link mechanism may have two joints whose axis is the length direction of the floor member. Here, the length direction of the floor member refers to the width direction of the gap between the base-isolated structure and the non-base-isolated structure. If the link mechanism has such two joints, one end side of the shaft can be moved up and down.

  The link mechanism may have three joints whose axis is the length direction of the floor member. If the link mechanism has such three joints, the two rods connected between the joints can be folded and accommodated, so that the movable distance of the vertical movement of the shaft can be increased. For this reason, it is possible to follow even when the floor member greatly climbs the entire surface in the lateral direction due to the earthquake.

  It is also preferable to provide two attachment means at both ends in the width direction of the floor member. In this case, the movement of the floor member becomes smoother than in the case where the attaching means is provided only at one place. For this reason, even if the floor member rides on one of the left and right sides, it can flexibly respond to the movement.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.
Example 1
As shown in FIGS. 1 and 2, the expansion joint cover according to the first embodiment is installed to close the groove 93 between the outer wall 90 and the ground 92 of the base-isolated building. And a mounting member 20 for mounting the floor member 10 to the outer wall 90.

  The floor member 10 includes a square plate-shaped receiving plate 10a and a top plate 10b that covers the receiving plate 10a and protrudes toward the ground 92.

  As shown in FIGS. 3 and 4, the mounting bracket 20 is fixed to the outer wall 90 with bolts 22. The mounting bracket 20 includes a link mechanism 23, a shaft 24 connected to the link mechanism 23, and a bearing 25 into which the shaft 24 is inserted. The shaft 24 and the bearing 25 are bearing mechanisms. As shown in FIG. 5, the link mechanism 23 is connected to the outer wall 90 by means of a bracket 23 a fixed by bolts 21 a and 21 b and a first joint 23 b (see FIG. 3) provided on the bracket 23 a. It consists of a rod 23c and a second rod 23e connected via a first rod 23c and a second joint 23d. A shaft 24 is welded to one end of the second rod 23e. The axial direction of the first joint 23b and the second joint 23d is the length direction of the receiving plate 10a, and the shaft 24 can be moved up and down. Further, the axial direction of the shaft 24 and the bearing 25 is the width direction of the receiving plate 10a, whereby the tip of the receiving plate 10a can be rotated in the vertical direction.

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 90 and the ground 92 approach each other due to earthquake motion (that is, when the state shown in FIG. 2 changes to the state shown in FIG. 6), the floor member 10 rides on the slope 92a of the ground 92. As a result, the tip of the floor member 10 rotates upward about the shaft 24 of the bearing mechanism. For this reason, even if the outer wall 90 and the ground 92 approach each other due to the relative motion due to the earthquake motion, the mounting portion of the floor member 10 is not damaged or it is difficult to return to the original state.
Further, as shown in FIGS. 7 and 8, when the wall 90 and the ground 92 are relatively moved in the lateral direction and the floor member 10 rides on the entire surface in the lateral direction at the time of the earthquake, as shown in FIG. Thus, the link mechanism 23 operates, and one end side of the shaft 24 of the bearing mechanism is lifted upward. For this reason, the attachment part of the floor member 10 is not damaged or it is difficult to come off and return to the original state.
Further, when the floor member riding on the entire surface returns to the original state, the link mechanism 23 acts to lower the one end side of the shaft shaft 24 downward and return to the original position.
As described above, in the expansion joint cover according to the first embodiment, the floor member 10 is obtained by the cooperative action of the link mechanism 23 and the bearing mechanism, regardless of the relative movement of the outer wall 90 and the ground 92 during an earthquake. Can move following its relative motion. For this reason, there is no possibility that the expansion joint cover is broken or difficult to come off and return to its original state.

(Example 2)
As shown in FIG. 10, the expansion joint cover according to the second embodiment has three joints including a first joint 30a, a second joint 30b, and a third joint 30c. The other structure is the same as that of the expansion joint cover of Example 1 shown in FIG. 9, and about the same structure, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In the expansion joint cover of the second embodiment, the two rods connected between the joints can be folded and accommodated, so that the movable distance of the vertical movement of the shaft 24 can be increased. For this reason, it is possible to follow even when the floor member 10 rides over the entire surface in the horizontal direction due to an earthquake.

(Example 3)
As shown in FIG. 11, the expansion joint cover of the third embodiment is provided with mounting brackets 50 and 51 similar to those of the first embodiment on one end side and the other end side in the width direction of the floor member 40. The other structure is the same as that of the expansion joint cover of Example 1 shown in FIG.

  In the expansion joint cover of the third embodiment, the floor member 40 moves more smoothly than the expansion joint cover of the first embodiment. For this reason, even if the floor member 40 rides on one of the left and right sides, the movement can be flexibly accommodated.

  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.

It is a top view at the time of installing the expansion joint cover of Example 1. It is II-II arrow sectional drawing of FIG. It is III-III arrow sectional drawing of FIG. It is a top view of the attachment part of the expansion joint cover of Example 1. FIG. It is a top view of the attachment means part of the expansion joint cover of Example 1. When the expansion joint cover of Example 1 is installed, it is sectional drawing seen from the length direction of the floor member when an outer wall and the ground approach by earthquake motion by the earthquake. It is III-III arrow sectional drawing of FIG. When the expansion joint cover of Example 1 is installed, it is sectional drawing seen from the width direction of the floor member when an outer wall and the ground approach by earthquake motion by the earthquake. It is sectional drawing at the time of the action | operation of the attachment part of the expansion joint cover of Example 1. FIG. It is sectional drawing at the time of the action | operation of the attachment part of the expansion joint cover of Example 2. FIG. It is sectional drawing at the time of installing the expansion joint cover of Example 3.

Explanation of symbols

90 ... Outer wall (base-isolated structure)
92 ... Ground (non-base-isolated structure)
93 ... groove (gap)
10, 40 ... floor member (10a ... receiving plate, 10b ... top plate)
24, 25 ... Bearing mechanism (24 ... Shaft, 25 ... Bearing)
20, 50, 51 ... Mounting bracket (mounting means)
23 ... Link mechanism (23a ... Bracket, 23b ... First joint, 23c ... First rod 23c, 23d ... Second joint, 23e ... Second rod)

Claims (4)

An expansion joint cover for closing a gap between the base isolation structure and the non-base isolation structure,
A floor member installed on the gap; and an attachment means for attaching the floor member to the seismic isolation structure side or the non-base isolation structure side. The attachment means has a tip of the floor member. A bearing mechanism that pivotally supports the floor member on the fixed end side of the floor member with the length direction of the gap between the seismic isolation structure and the non-base isolation structure as an axial direction so as to be rotatable in the vertical direction When,
A link mechanism having a joint whose axial direction is the width direction of the gap between the base isolation structure and the non-base isolation structure of the floor member and capable of vertically moving one end side of the shaft of the bearing mechanism; Expansion joint cover characterized by being. The joint expansion joint cover according to claim 1, characterized in that it consists of two joints of the first joint and the second joint. The joint first articulation, expansion joint cover according to claim 1, characterized in that it consists of three joints of the second joint and the third joint. The attachment means is provided at two locations at both ends in the length direction of the gap between the base isolation structure and the non-base isolation structure of the floor member. The expansion joint cover described in the item.

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