JP6918346B2 - Expansion joint device - Google Patents

Description

The present invention relates to an expansion joint device provided between a seismic isolation structure and the outside of the seismic isolation structure.

When installing a seismic isolation structure, a gap is provided to prevent the seismic isolation structure and the outside of the seismic isolation structure from colliding with each other due to seismic motion. This gap is shielded by a cover member of the expansion joint device so as not to obstruct passage or the like.

In such an expansion joint device, in order to prevent damage due to seismic motion, as shown in FIG. 1A, slide members 101a and 101b are attached to the back side of one end of the cover members 100a and 100b, and the slide members 101a and 101b are attached to the slide rail 102. The top slides in the longitudinal direction of the gap G (the direction of the arrow X shown in FIG. 1A), and the other ends of the cover members 100a and 100b are in the width direction of the gap G (shown in FIG. 1A). Expansion joint devices that are slidable in the direction of the arrow Y have been developed (see Patent Documents 1 to 4).

For example, in Patent Document 1, a rolling member is provided at one end of a cover body that is spread over joints between adjacent buildings and covers the joints, and the rolling member is provided on the floor side edge of one of the buildings. A guide path is provided to support the member so that it can travel only in the direction along the joint, and the other end of the cover body is slidably mounted on the floor side edge of the other building in the joint width direction. A featured expansion joint device is described.
According to this expansion joint device, it can be applied to a place where there is a rising portion such as a wall on the side of the free end of the cover body.

Further, in Patent Document 2, the front end portion of the cover material covering the skeleton gap is movably placed on one skeleton side, the rear end portion is connected to the other skeleton side via a slide member, and the slide member is , The moving rail member is slidably fitted to the moving rail member in the longitudinal direction of the skeleton gap, and the moving rail member is connected to the rail receiving member connected to the other skeleton side so as to be slidable in the depth direction of the skeleton gap. An expansion joint device having the above-mentioned configuration is described.
It is described that the expansion joint device can quickly and smoothly absorb the movement of the skeleton and can be installed in the skeleton gap regardless of the skeleton condition.

Further, in Patent Document 3, a cover body that is spread over joints between floors of adjacent buildings and covers the joints, a slider that is arranged at one end of the cover body, and a side edge of one floor. In a floor joint cover device including a rail member that slidably supports the slider in a direction along a joint, the receiving edge portion of the rail member that supports the slider is directed toward one building side. Described is an expansion joint device characterized in that it has an inclined receiving portion that inclines downward.
According to this expansion joint device, it is possible to prevent a gap from being generated between one end of the cover body and the side edge of the floor facing the cover body.

Further, Patent Document 4 is an expansion joint device provided with a joint cover that covers a clearance of an expansion joint portion of a building, and the joint cover is supported by a movable support portion and a fixed support portion located across the clearance. The movable support portion can support the joint cover vertically and slidably along the joint expansion and contraction direction, and the fixed support portion includes a lateral slide rail oriented in the lateral direction intersecting the joint expansion and contraction direction. An expansion joint device comprising a lateral slide member that can slide laterally along a lateral slide rail, and the joint cover is connected to the lateral slide member so as to be inclined with respect to a joint expansion / contraction direction. Has been described.
According to this expansion joint device, when the joint cover is tilted, it is possible to prevent a decrease in the strength and slide function of the lateral slide portion.

Japanese Unexamined Patent Publication No. 2000-008497 Japanese Unexamined Patent Publication No. 2003-301531 Japanese Unexamined Patent Publication No. 2004-092019 JP-A-2017-0008689

The present inventors conducted a test by simulated seismic motion on a conventional expansion joint device in which a cover member can slide in the XY directions. As a result, as shown in FIG. 1B, as a result of the cover members 100a and 100b moving in the X and Y directions, they rotate on the XY plane and the corner portions 103a and 103b of the cover members 100a and 100b. Has come into contact with the opposite bank 102 side, and it has been found that a phenomenon in which free movement is hindered (hereinafter, this phenomenon is referred to as a "sticking phenomenon" in the present specification) occurs. Such a sticking phenomenon has not been grasped in the past, and no countermeasure has been taken for the expansion joint devices described in Patent Documents 1 to 4.

The present invention has been made in view of the above problems, and it is an object to be solved to provide an expansion joint device in which a cover member sticking phenomenon is unlikely to occur at the time of an earthquake.

The expansion joint device of the present invention is an expansion joint device provided in a gap around a seismic isolation structure.
It is provided with a cover member that is passed through the gap.
One end of the cover member is slidably mounted on the seismic isolation structure side or the opposite bank side of the seismic isolation structure in the width direction of the gap.
A slide member extending in the longitudinal direction of the gap is loosely connected to the other end of the cover member by a connecting member, and the slide member is attached to the opposite bank side of the seismic isolation structure or the seismic isolation structure side. It is slidably fitted on the fixed slide rail in the longitudinal direction of the gap.
The slide member has a rising portion for preventing the cover member from coming into contact with the opposite bank side of the seismic isolation structure or the seismic isolation structure side due to the rotation of the cover member in the horizontal plane due to seismic motion. It is characterized in that it is provided so as to extend in the longitudinal direction of the gap.

In the expansion joint device of the present invention, one end of the cover member that is passed to the gap around the seismic isolation structure is slidably mounted in the width direction of the gap, so that the cover member is slidably placed in the width direction of the gap during an earthquake. Even if the cover member moves, one end of the cover member moves in the width direction of the gap, and damage can be prevented.

Further, a slide member extending in the longitudinal direction of the gap is connected to the other end of the cover member by a connecting member, and the slide member is fixed to the opposite bank side of the seismic isolation structure or the seismic isolation structure side. It is slidably fitted on the slide rail in the longitudinal direction of the gap. Therefore, even if the cover member moves in the longitudinal direction of the gap during an earthquake, the slide member can be prevented from being damaged by moving on the slide rail.

Therefore, the cover member moves following both the longitudinal direction and the width direction of the gap due to the seismic motion, thereby preventing the expansion joint device from being damaged.

Further, since the cover member and the slide member are loosely connected by the connecting member, even if the cover member rides on the opposite bank side and is flipped up due to the earthquake motion, there is a risk of damage due to the flipping up of the cover member due to the presence of the looseness. Can be alleviated.

Further, the slide member is provided with a rising portion for preventing the cover member from coming into contact with the opposite bank side or the seismic isolation structure side due to the rotation of the cover member in the horizontal plane due to the seismic motion. When the cover member moves in both the longitudinal direction and the width direction of the gap, the rotation of the cover member in the horizontal plane is stopped by the rising portion, and the cover member comes into contact with the opposite bank side to hinder free movement. It is possible to prevent the "sticking phenomenon".

In the kiss spansion joint device of the present invention, the connecting member is inserted so as to communicate the hole formed in the cover member and the hole formed in the slide member, and a gap is provided between the connecting member and the hole. Is preferable. In this case, the slide member is loosely connected by the connecting member due to the gap between the connecting member and the hole, and even if the cover member is flipped up to the opposite bank side, the rail member may come off from the slide rail. , It can be prevented from being damaged. As such a connecting member, for example, bolts and nuts can be used.

Further, the upper end of the rising portion is preferably set to be equal to or lower than the height of the upper surface of the cover member from the viewpoint of not obstructing the passage.
More preferably, the upper end of the rising portion is set to a height of 1/3 or more and 2/3 or less of the thickness of the cover member from the upper surface of the cover member. If the upper end of the rising portion is less than 1/3 from the upper surface of the cover member, the slide member may get over the cover member due to seismic motion. Further, when the upper end of the rising portion exceeds 2/3 from the upper surface of the cover member, when the cover member rides on the opposite bank side and is flipped up, the cover member and the upper end of the rising portion may interfere with each other and be damaged. be.

Further, it is preferable that the connecting member is attached with an elastic member that urges the cover member in the direction of pressing the cover member against the rising portion. In this case, the gap between the cover member and the rising portion does not widen due to the earthquake motion, and the risk of the heel of the shoe getting caught in the gap or tripping during passage can be avoided.

Further, it is preferable that the slide member is slidably moored on the slide rail to a hook member provided on the slide rail. In this case, it is possible to prevent the slide member from coming off the slide rail due to seismic motion.

It is a figure which shows the sticking phenomenon of the conventional expansion joint device. It is sectional drawing of the expansion joint apparatus of Example 1. FIG. It is a partial cross-sectional view of the expansion joint device of Example 1. FIG. It is a partial decomposition view of the expansion joint apparatus of Example 1. FIG. It is a top view of the expansion joint apparatus of Example 1. FIG. It is a partial cross-sectional view of the expansion joint apparatus of Example 2. FIG. FIG. 5 is a partial cross-sectional view of the expansion joint device of the second embodiment when the cover member 1 is flipped up to the opposite bank side. It is sectional drawing of the expansion joint apparatus of Example 3. FIG. It is a partial cross-sectional view of the expansion joint device of Example 3. FIG. It is a partial decomposition view of the expansion joint apparatus of Example 3. FIG.

Hereinafter, the expansion joint device embodying the present invention will be described in detail with reference to the drawings.
(Example 1)
As shown in FIG. 2, the expansion joint device of the first embodiment is installed to close the gap 92 between the floor slab 90 and the ground 91 of the seismic isolated building, and is installed between the floor slab 90 and the ground 91. It is provided with a steel cover member 1 erected between them.

As shown in FIGS. 3 and 4, the cover member 1 has a top plate 1a and a back plate 1b. A long square tubular slide member 2 is provided below one end of the back plate 1b on the floor slab 90 side so as to extend parallel to the longitudinal direction of the gap 92, and a pin 3 is provided on the upper side of the slide member 2. Is welded. The cover member 1 and the slide member 2 are connected to each other by inserting the pin 3 into the hole 1c formed in the cover member 1. However, since the hole 1c through which the pin 3 is inserted is slightly larger than the diameter of the pin 3, the connection between the cover member 1 and the slide member 2 is loosely connected, and due to this looseness, Even if the cover member 1 rides on the opposite bank and inclines, it will not be damaged. Further, a rising portion 2a made of a long iron plate is extended and welded to the side surface of the slide member 2 on the floor slab 90 side, and the upper end of the rising portion 2a is flush with the top plate 1a of the cover member 1. Has been done. The slide member 2 is slidably fitted in the J-shaped slide rail 4 having a cross section provided at a corner on the floor slab 90 side.

Further, as shown in FIG. 2, an inclined portion 1d is attached to the tip of the back plate 1b of the cover member 1 on the ground 91 side in an obliquely upward direction.

The operation and effect of the expansion joint device of the first embodiment configured as described above at the time of an earthquake will be described.
At the time of an earthquake, as shown in FIG. 5, when the floor slab 90 and the ground 91 cause a relative motion in the longitudinal direction of the gap 92 (direction of arrow A in FIG. 5), the slide member 2 shown in FIG. 3 moves to the floor. The cross section provided at the corner on the slab 90 side slides in the slide rail 4 having a substantially J shape. Therefore, it is possible to prevent the cover member 1 and the slide member 2 from interfering with the surroundings and being damaged.

Further, even if the cover member 1 receives a force in the direction of rotation on the horizontal plane due to the seismic motion (direction of arrow B in FIG. 5), the cover member 1 comes into contact with the rising portion 2a shown in FIG. 3, and the cover member 1 The movement of the vehicle rotating on the horizontal plane is blocked. Therefore, the cover member 1 is not pressed against the slide rail 4, and the "sticking phenomenon" as shown in FIG. 1 (b) does not occur.

Further, when the cover member 1 moves in the width direction of the gap 92 (direction of arrow C in FIG. 5) at the time of an earthquake, the inclined portion 1d provided at the tip of the back plate 1b of the cover member 1 on the ground 91 side becomes the ground. Riding on the 91 side, the cover member 1 is tilted. However, since the hole 1c through which the pin 3 is inserted is slightly larger than the diameter of the pin 3, the connection between the cover member 1 and the slide member 2 is loosely connected, and the cover is covered due to this looseness. Even if the member 1 is slightly tilted, the connecting portion between the cover member 1 and the slide member 2 is not damaged.

(Example 2)
In the expansion joint device of the second embodiment, as shown in FIG. 6, the upper end of the rising portion 12a is the height at the center of the top plate 1a and the back plate 1b of the cover member 1 (that is, H = 2h in FIG. 6). Has been done. Others are the same as those of the expansion joint device of the first embodiment, and the same components are designated by the same reference numerals and detailed description thereof will be omitted.

In the expansion joint device of the second embodiment, as shown in FIG. 7, even if the cover member 1 rides on the opposite bank due to the seismic motion and jumps up and tilts greatly, the tip portion of the top plate 1a of the cover member 1 interferes with the rising portion 12a. The rising portion 12a is not damaged by the cover member 1.

(Example 3)
As shown in FIG. 8, the expansion joint device of the third embodiment is installed to close the gap 92 between the floor slab 90 and the ground 91 of the seismic isolated building, and is installed in the floor slab 90 and the ground 91. It is provided with a steel cover member 21 erected between them.

As shown in FIG. 9, the cover member 21 has a top plate 21a and a back plate 21b. A long slide member 221 and a slide member 222 are provided below one end of the back plate 21b on the floor slab 90 side so as to extend and overlap in parallel with the longitudinal direction of the gap 92. The slide member 221 has a substantially L-shaped cross section, and the upper end of the slide member 221 is provided with a rising portion 221b in contact with one end of the cover member 21 on the floor slab 90 side, and the lower end is bent inward. A portion 221a is provided. The upper end of the rising portion 221b is set to the height at the center of the top plate 21a and the back plate 21b of the cover member 21.
Further, the slide member 222 has an opening downward, and a bent portion 222a bent inward is provided at the lower end of one side. The cross-sectional shape of the slide member 221 and the slide member 222 combined is substantially h-shaped. The slide member 221 and the slide member 222 and the back plate 21b of the cover member 21 are provided with holes for communication, and the slide member 221 and the slide member 222 are fixed by inserting bolts 23a into the holes and fixing them with nuts 23b. It is connected to the cover member 21. The hole through which the bolt 23a is inserted is slightly larger than the diameter of the bolt 23a. A torsion spring 24 is inserted over the back plate 21b of the nut 23b, and the torsion spring 24 is attached so as to urge the cover member 21 toward the floor slab 90 side.
Further, a slide rail 40 having a substantially J-shaped cross section is provided at a corner on the floor slab 90 side so as to extend parallel to the longitudinal direction of the gap 92, and the horizontal plane of the slide rail 40 has an L-shaped cross section. The hook member 26 of the above is fixed by bolts and nuts 28 with a gap between the hook member 26 and the slide rail 40 via the spacer 27. The bent portions 221a and 222a at the lower ends of the slide member 221 and the slide member 222 are fitted in the gap between the slide rail 40 and the hook member 26, whereby the slide member 221 and the slide member 222 are fitted with the slide rail 40 and the hook member. It is slidable along the gap with 26.

Further, as shown in FIG. 8, an inclined portion 21d is attached to the tip of the back plate 21b of the cover member 21 on the ground 91 side in an obliquely upward direction.

The operation and effect of the expansion joint device of Example 3 configured as described above at the time of an earthquake will be described.

When the floor slab 90 and the ground 91 shown in FIG. 8 cause relative movement in the longitudinal direction of the gap 92 at the time of an earthquake, the slide member 221 and the slide member 222 shown in FIG. 9 become the slide rail 40 and the hook member 26. Slide in the gap of. Therefore, it is possible to prevent the cover member 21, the slide member 221 and the slide member 222 from colliding with the surroundings and being damaged. Further, since the bent portions 221a and 222a at the lower ends of the slide member 221 and the slide member 222 are fitted in the gap between the slide rail 40 and the hook member 26, the slide member 221 and the slide member 222 are detached from the slide rail 40. hard.

Further, even if the cover member 21 receives a force in the direction of rotating on the horizontal plane due to the earthquake motion, the cover member 21 comes into contact with the rising portion 221b shown in FIG. 9, and the movement of rotating the cover member 21 on the horizontal plane is performed. Be blocked. Therefore, the cover member 21 is not pressed against the slide rail 40, and the "sticking phenomenon" does not occur.

Further, when the cover member 21 moves in the width direction of the gap 92 at the time of an earthquake, the inclined portion 21d provided at the tip of the back plate 21b of the cover member 21 on the ground 91 side rides on the ground 91 side, and the cover member 21 moves. Tilt. However, since the hole through which the bolt 23a is inserted is slightly larger than the diameter of the bolt 23a, the connection with the cover member 21 and the slide members 221, 222 is loosely connected, and due to this looseness. Even if the cover member 21 is slightly tilted, the connecting portion between the cover member 21 and the slide members 221 and 222 is not damaged.

Further, in this expansion joint device, since the cover member 21 is urged toward the floor slab 90 by the torsion spring 24, the gap between the cover member 21 and the floor slab 90 is widened by the earthquake motion even in the event of an earthquake. Therefore, it is possible to avoid the risk of the heel of the shoe getting caught when passing.

Further, in this expansion joint device, even if the cover member 21 rides on the opposite bank due to the earthquake motion and jumps up and tilts greatly, the tip portion of the top plate 21a of the cover member 21 does not interfere with the rising portion 221b, and the rising portion 221b Is not damaged by the cover member 21.

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

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

90 ... Floor slab (seismic isolation structure)
91 ... Ground (non-seismic isolation structure)
92 ... Gap 1, 21 ... Cover member (1a, 21a ... Top plate, 1b, 21b ... Back plate)
2,221,222 ... Slide members 3,23a, 23b ... Connecting members (23a ... Bolts, 23b ... Nuts)
4, 40 ... Slide rails 2a, 12a, 221b ... Rising part 24 ... Torsion spring (elastic member)
26 ... Hook member

Claims (5)

An expansion joint device installed in the gap around the seismic isolation structure.
It is provided with a cover member that is passed through the gap.
One end of the cover member is slidably mounted on the seismic isolation structure side or the opposite bank side of the seismic isolation structure in the width direction of the gap.
A slide member extending in the longitudinal direction of the gap is loosely connected to the other end of the cover member by a connecting member, and the slide member is attached to the opposite bank side of the seismic isolation structure or the seismic isolation structure side. It is slidably fitted on the fixed slide rail in the longitudinal direction of the gap.
The slide member has a rising portion for preventing the cover member from coming into contact with the opposite bank side of the seismic isolation structure or the seismic isolation structure side due to the rotation of the cover member in the horizontal plane due to seismic motion. It is provided so as to extend in the longitudinal direction of the gap, and the upper end of the rising portion is characterized in that the height is 1/3 or more and 2/3 or less of the thickness of the cover member from the upper surface of the cover member. Expansion joint device. The connecting member is inserted so as to communicate the hole formed in the cover member and the hole formed in the slide member, and a gap is provided between the connecting member and the hole. The expansion joint device according to claim 1. The expansion joint device according to claim 1 or 2, wherein the connecting member comprises a bolt and a nut. The expansion joint device according to any one of claims 1 to 3 , wherein an elastic member for urging the cover member in a direction of pressing the cover member against the rising portion is attached to the connecting member. The expansion joint device according to any one of claims 1 to 4 , wherein the slide member is slidably moored on the slide rail to a hook member provided on the slide rail.

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