JP3370567B2 - Expansion joint device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided over a gap between a pair of skeletons adjacent to each other, allows relative displacement between a pair of skeletons, and prevents rainwater from entering the gap. An expansion joint device.

[0002]

2. Description of the Related Art Conventionally, when a new building is built adjacent to an old building after construction, or a new building is built adjacent to the old building, a space between a pair of adjacent buildings is formed. Expansion joint devices for closing are widely used. This type of expansion joint device includes an outer expansion joint structure and an inner expansion joint structure for covering a space formed between a pair of building frames. The outer expansion joint structure constitutes an outer surface between the outer walls of the pair of skeletons, and mainly prevents rainwater from entering the void. Further, the inner expansion joint structure constitutes an inner surface between the outer walls of the pair of skeletons, and defines a passage through which a person passes.

[0003]

In such an expansion joint device, the relative displacement of the pair of skeletons is allowed, but when the pair of skeletons undergoes a large relative displacement, the expansion joint device is formed. If a part of the above is also largely displaced and largely protrudes to the outside and / or the inside of the outer wall, sufficient safety cannot be ensured, which may cause a safety problem. In particular,
If a part of the inner expansion joint structure largely projects inward, that is, toward the passage side, there is a risk that the safety of a person passing through the passage connecting the pair of skeletons may be impaired.

An object of the present invention is to provide an expansion joint device capable of ensuring sufficient safety even if a pair of skeletons are relatively displaced.

[0005]

According to the present invention, a support plate is provided on one of a pair of skeletons and extends toward the other skeleton, and is provided on the other skeleton, the tip of which is supported by the support plate. And a cover plate that is formed of a first plate member and a second plate member that are pivotally connected to each other. The first plate member is pivotally mounted on the other body. The first plate member is connected to a first urging unit that urges the first plate member toward the supporting plate by a spring with respect to the other frame, and the second plate member is connected. In the expansion joint device, a second urging means for urging a spring of the second plate member toward the support plate is connected to the first plate member. .

According to the present invention, the support plate is provided on one of the frames, the cover plate is rotatably attached to the other frame, and the tip of the cover plate is supported by the support plate. Can be reliably supported between the other frame and the support plate.
The cover plate is composed of first and second plate members pivotally connected to each other. Since the first plate member is pivotally connected to the other body, the first plate member for the other body can be rotated. By the pivoting movement of the plate member and the pivoting movement of the second plate member with respect to the first plate member, the displacement can be absorbed even if the pair of skeletons are relatively displaced. Further, the first plate member is connected to a first spring biasing means for biasing the first plate member toward the support plate, and the second plate member is spring biased toward the support plate. Since the second spring urging means is connected, it is possible to reliably prevent the first and second plate members from significantly protruding.

Further, according to the present invention, the support plate and the cover plate constitute an inner expansion joint structure, and an outer expansion joint structure is arranged outside the inner expansion joint structure, and the outer expansion joint structure is provided. Is an outer cover plate rotatably mounted on either one of the pair of skeletons, a support member provided on the other of the outer cover plates for supporting a tip portion of the outer cover plate, and a predetermined outer cover plate. A swivel blocking member for blocking swivel motion beyond an angular position, a third biasing means attached to the outer cover plate for biasing the outer cover plate toward the swivel block, and the outer cover plate. And a pantograph body mounted between a pair of skeletons on the inner side of the outer cover plate so that a part of the outer cover plate abuts against the turning prevention member. The pivoting movement of the outer cover plate beyond the predetermined angular position is prevented, and the pantograph body prevents the distal end portion of the outer cover plate from largely moving beyond the support member. And

According to the present invention, the inner expansion joint mechanism and the outer expansion joint mechanism are provided, and the cover plate composed of the first and second plate members is used for the inner expansion joint structure. The protrusion of the cover plate can be suppressed to the inside of the gap between the skeletons of the
For example, when a passage or the like is formed by the inner expansion joint structure, it is possible to ensure sufficient safety for passersby passing through the passage. Further, the outer expansion joint structure includes an outer cover plate, a support member that supports a tip portion of the outer cover plate, a swivel motion blocking member that blocks swivel motion of the outer cover plate beyond a predetermined angular position, and an outer cover plate. Since the third urging means for urging the spring toward the predetermined angular position is provided, it is possible to prevent the outer cover plate from largely protruding outward while allowing a large relative displacement of the pair of skeletons. You can Further, since the expandable and contractible pantograph body is provided between the pair of skeletons, the pantograph body prevents the distal end portion of the outer cover plate from largely moving beyond the support member.

[0009]

1 is a horizontal sectional view showing an embodiment of an expansion joint device according to the present invention. In FIG. 1, the expansion joint device shown in the drawing is arranged between voids 10 formed between the outer walls 6 and 8 of the skeletons 2 and 4, which are a pair of adjacently constructed structures. In this embodiment, the inner wall portion 12 of the outer wall 6 of the one frame 2 and the outer wall 8 of the other frame 4 are used.
The inner expansion joint structure 16 is provided between the inner expansion joint structure 16 and the inner wall portion 14, and the inner expansion joint structure 16 is used, for example, to form a passage connecting between the pair of frames 2 and 4. . Further, an outer expansion joint structure 22 is arranged between the outer wall portion 18 of the outer wall 6 of the one body 2 and the outer wall portion 20 of the outer wall 8 of the other body 4, and the outer expansion joint structure 2
2 functions as an outer wall of the passage. In addition, body 2, 4
The inner wall portions 12 and 14 of the above are composed of decorative panels, and these decorative panels are attached to the columns 24 and 26 of the reinforced structure as required.

The inner expansion joint structure 16 will be described below. Inner expansion joint structure 16 shown
Is a support plate 28 provided on one of the frames 2 and a cover plate 30 rotatably attached to the other frame 4.
It has and. The other body 4 is attached to the support column 24 of the body 2.
A support stud 32 that extends linearly toward is fixed. A plurality of support studs 32 (see FIG. 1) are arranged at intervals in the vertical direction of the body 2 (direction perpendicular to the plane of FIG. 1).
(Only one of which is shown in FIG. 2) is provided, and an auxiliary column 34 is fixed to the tip end portions of these support studs 32. The auxiliary column 34 and the columns 24 and 26 extend in the vertical direction. The support plate 28 is composed of a thin plate-shaped member, and is fixed to the support column 24 and the auxiliary support column 34 of the frame 2 by a plurality of fixing screws 36. As shown in FIG. 1, the support plate 28 extends from one frame 2 toward the other frame 4 to about half of the gap.

The cover plate 30 is composed of first and second plate members 38 and 40 having substantially the same size. One end of the first plate member 38 is rotatably attached to the other skeleton 4. In this embodiment, a bracket 42 is attached to the column 26 of the other body 4,
A support bracket 44 is attached to the bracket 42, and the first plate member 30 is connected to the support bracket 44 via a hinge 46. Therefore, the first
The plate member 30 is rotatable about the pivot axis of the hinge 46 (extending in the direction perpendicular to the paper surface in FIG. 1) toward the inside indicated by the arrow 48 and the outside indicated by the arrow 50. Further, a bracket 52 extending toward the one frame 2 is fixed to the support bracket 44, and a mounting member 54 is fixed to the bracket 52. Mounting member 54
Extends linearly in a direction approaching the outer expansion joint structure 22 toward one of the frames 2. A coil spring 56 (constituting a first urging means) for urging the first plate member 38 in the direction indicated by the arrow 50 is urged between the mounting member 54 and the first plate member 38. It is provided. In this embodiment, a mounting hole is formed in the mounting member 54, and one end of the coil spring 56 is locked in this mounting hole. A plurality of ribs 58 are provided on the outer surface (upper surface in FIG. 1) of the first plate member 38 at intervals in the vertical direction, and the other end of the coil spring 56 has a specific rib 58. It is locked in the mounting hole provided in. Since the coil springs 56 are connected in this manner, the coil springs 56 bias the first plate member 38 in the outward direction indicated by the arrow 50, and normally the ribs 58 provided on the first plate member 38. Abut the bracket 52 (which functions as a swivel stop for the cover plate 16).
The turning movement beyond the predetermined angular position shown in FIG. 1 is reliably prevented. When in the predetermined angle position, the inner surface (lower surface in FIG. 1) of the first plate member 38 defines substantially the same surface as the surface of the inner wall portion 14 of the other skeleton 4, and from the surface of the inner wall portion 14. Substantially parallel to one body 2, it extends.

The other end of the first plate member 38 and one end of the second plate member 40 (ends adjacent to each other) are pivotally connected via a hinge 60. Second
The outer surface (upper surface in FIG. 1) of the plate member 40 is also provided with a plurality of ribs 62 at intervals in the vertical direction, and the portions between the ribs 58 of the first plate member 38 and the second plate member are provided. The part between the ribs 62 of 40 is connected via a hinge 60. Therefore, the second plate member 40 is rotatable about the turning axis of the hinge 60 (extending in the up-down direction in FIG. 1) as the center, and as shown by the arrow 64 and outside by the arrow 66.

A second urging means 68 for urging the second plate member 40 against the first plate member 38 in the direction indicated by the arrow 66 is connected to the second plate member 40. There is. The second biasing means 68 comprises a balancer 70, which is attached to a particular support stud 32. The balancer 70 has an elongated wire 72 wound in a predetermined direction, and the tip of the wire 72 is connected to a mounting hole formed in the specific rib 62 of the second plate member 40. A biasing force in the unwinding direction indicated by arrow 71 is applied to the wire 72 by a torsion spring (not shown). A pair of guide rollers 75 is rotatably mounted on the support plate 28 so that the wire 72 can be pulled out and rewound smoothly.
2 is pulled out through a pair of guide rollers 75 and is unwound. Since the balancer 70 is provided in this manner, the second plate member 40 is spring-biased in the direction indicated by the arrow 66, and the other end (the tip of the cover plate 30) is elastically attached to the surface of the support plate 28. Is pressed against.
In such a state, as shown in FIG. 1, the second plate member 40 continuously extends linearly from the first plate member 38, and its inner surface is flush with the inner surface of the first plate member 38. Stipulate. The inner surfaces of the first and second plate members 38 and 40 define, for example, the inner surfaces of the passages that connect the pair of skeletons 2 and 4. Since the other end of the second plate member 40 is pressed against the support plate 28, it can move relative to this support plate 28.

Next, the outer expansion joint structure 22 will be described. The illustrated outer expansion joint structure 22 includes an outer cover plate 74 and a support member 76 that supports a tip portion of the outer cover plate 74. There is. An edge member 78 is fixed to the side surface of the outer side wall portion 18 of the one frame 2 by an anchor bolt 80. The edge member 78 has a support attachment portion 78a extending toward the other frame 4, and a bracket 82 is attached to the support attachment portion 78a. The outer cover plate 7 is attached to the bracket 82 via a hinge 84.
One end of 4 is mounted so as to be rotatable. Therefore,
The outer cover plate 74 has a pivot axis of the hinge 84 (see FIG. 1).
(Which extends in the direction perpendicular to the plane of the drawing) at the center and can be swung inward as indicated by arrow 83 and outward as indicated by arrow 85. The outer cover plate 74 has an outer plate member 86 that defines an outer surface (upper surface in FIG. 1) of the outer expansion joint structure 22, and an inner surface (lower surface in FIG. 1) of the outer plate member 86 has the vertical direction. A plurality of ribs 88 are provided at intervals.

A swivel prevention member 90 for preventing swivel movement of the outer cover plate 74 beyond a predetermined angular position is attached to the support mounting portion 78a of the edge member 78 by a mounting screw 92. A coil spring 94 (constituting a third urging means) for urging the outer cover plate 74 toward the inner side as shown by an arrow 83 is provided in association with the turning prevention member 90. One end of the coil spring 94 is connected to a mounting hole formed in the edge member 78, and the other end is connected to a mounting hole formed in a specific rib 88 of the outer cover plate 74. The coil spring 94 is covered with a tubular protective member 96 made of a flexible and slidable material such as polyvinyl chloride.
With this configuration, the coil spring 94 spring-biases the outer cover plate 74 inward as indicated by the arrow 83, and the lower surface of the outer cover plate 74 is rotated by the lowering member 90.
By abutting against, the turning movement beyond the predetermined angular position shown in FIG. 1 is reliably prevented. Outer cover plate 7
When 4 is in the above-mentioned predetermined angular position, the outer surface of the outer cover plate 74 defines a substantially continuous flush surface with the outer surface of the outer wall portion 18 of the one frame 2.

The support member 76 is attached to the other body 4. In this form, the support member 76 is fixed to the side surface of the outer wall portion 20 of the other body 4 by the anchor bolt 100. The support member 76 has an inclined portion 102 that inclines inward toward the direction closer to the one body 2, and an attachment portion 103. A step portion 104 is provided at an intermediate portion of the inclined portion 102, and the outer cover plate 74 is provided.
Is in the above-mentioned predetermined angle position, the tip end portion thereof is supported by the step portion 104 of the support member 76. Also, mounting 103
An auxiliary member 105 is fixed to the auxiliary member 105, and a step portion 10 of the inclined portion 102 is attached to the auxiliary member 105 via a bracket 107.
4 are supported. A cushioning member 106 made of, for example, a rubber material is provided on the surface of the step portion 104, so that the impact when the outer cover plate 74 collides with the step portion 104 is buffered.

The outer expansion joint structure 22 further includes a pantograph body 108 disposed inside the outer cover plate 74. Referring also to FIG. 2, the illustrated pantograph body 108 includes four link members 110 that are relatively short.
And two relatively long link members 112 are rotatably connected to each other via a pin 114 as required, and are provided between the pair of skeletons 2 and 4 so as to be expandable and contractible. In this embodiment, one end of the pantograph body 108 (the pin 114 that connects the pair of link members 110 located on the left side in FIG. 2) is hinged to the support attachment portion 78a of the edge member 78 attached to one of the frames 2. Is rotatably connected via the other end (the pin 114 connecting the pair of link members 110 located on the right side in FIG. 2),
The inclined portion 102 of the support member 76 attached to the other frame 4
It is pivotally connected to a bracket 118 fixed to the hinge via a hinge 120. Therefore, the pantograph body 108 is capable of expanding and contracting in accordance with the change in the space between the pair of skeletons 2 and 4, and the swivel axes of the hinges 116 and 120 with respect to the pair of skeletons 2 and 4 (the swirling axis lines of these hinges). Figure 1
Can extend inward and outward as a center (extending in a direction perpendicular to the plane of the drawing). In the pantograph body 108, as will be understood from the description below, the tip end portion of the outer cover plate 74 has the step portion 104 of the support member 76.
When the outer cover plate 74 is swung inward from the outside, the outer cover plate 74 is prevented from swinging largely inward.

A water stop plate 122 and a fireproof zone 124 are further provided between the pair of frames 2 and 4. The water stop plate 122 and the fireproof belt 124 are arranged between the outer expansion joint structure 22 and the inner expansion joint structure 16, and
2 is arranged outside the refractory zone 124. Water stop plate 12
2 is made of a rubber material or the like having flexibility and elasticity. An attachment member 128 is attached to the inner surface of the outer wall portion 18 of the one frame 2 by an anchor bolt 126, and one end portion of the water blocking plate 122 is attached to the attachment member 128.
It is mounted on one of the mounting parts by mounting bolts and nuts. A mounting member 130 is fixed to the tip of the inclined portion 102 of the support member 76, and the water blocking plate 1
The other end of 22 is attached to this attachment member 13 by a fixing screw.
It is fixed at 0. The refractory zone 124 is formed of a refractory material such as ceramic fiber. This fire zone 1
One end of 24 is attached to the other attachment portion provided on the attachment member 128 by an attachment bolt and nut. A plate 132 is fixed to the mounting member 130, a mounting member 138 is mounted to the plate 132 via brackets 134 and 136, and the other end of the fire-resistant zone 124 is mounted to the mounting member 138 with mounting bolts and nuts. Has been. With this configuration, the water stop plate 122 covers the space between the pair of skeletons 2 and 4 inside the outer expansion joint structure 22 and prevents rainwater from entering from the outside. Further, the fireproof zone 124 prevents the intrusion of fire from the outside inside the water blocking plate 122.

The operation of the expansion joint device described above will be described below with reference to FIGS. For example, when the pair of skeletons 2 and 4 are displaced in a direction in which they are separated (or approached) from each other, the inner expansion joint structure 16 and the outer expansion joint structure 22 are displaced as shown in FIG. 3 (or FIG. 4). To do. That is, in the inner expansion joint structure 16, the cover plate 30 moves in a direction of separating (or approaching) from the other body 4,
The tip portion of the cover plate 30 moves along the surface of the support plate 28 (or rides on the surface of the inner wall portion 12 from the support plate 28). At this time, the coil spring 56
Biases the first plate member 38 of the cover plate 30 in the outward direction close to the support plate 28, that is, in the direction indicated by the arrow 50, and the balancer 70 moves the second plate member 40 close to the support plate 28. Since the first plate member 38 is urged in the outward direction, that is, the direction indicated by the arrow 66, the lower surface of the first plate member 38 abuts the bracket 52 (or the tip portion of the first plate member 38 rides on the support plate 28). The second plate member 40 is supported by the support plate 28 (or the inner wall portion 12) so that the second plate member 40 is not bent against the first plate member 38. The plate member 38 of No. 1 defines and extends substantially in the same plane. Therefore, the cover plate 30 does not substantially project inside the passage, and sufficient safety for the passage side is ensured.

Further, in the outer expansion joint structure 22, the outer cover plate 74 moves in a direction away from (or close to) the other frame 4, and the cover plate 7 is moved.
The tip end of 4 moves away from the step 104 of the support member 76 (or moves outward along the inclined portion 102 of the support member 76 and rides on the outer wall 20 of the skeleton 4). At this time, the coil spring 94 biases the outer cover plate 74 in the inward direction indicated by the arrow 83, so that the outer cover plate 74 is
The lower surface of the outer cover plate 74 is held at the predetermined angle position by contacting the swivel prevention member 90 (or the lower surface thereof is elastically pressed against the upper end portion of the support member 76), and the outer cover plate 74 largely projects inward and outward. Is prevented. At this time, the pantograph body 108 is
As can be seen from FIG. 3 (or FIG. 4), it is expanded (or contracted) according to the displacement amount of the gap between the pair of skeletons 2 and 4.

Further, a direction substantially perpendicular to the direction in which the pair of skeletons 2 and 4 are separated from and close to each other, for example, one skeleton 2 is downward (or upward) in FIG. 1 with respect to the other skeleton 4. When the inner expansion joint structure 16 and the outer expansion joint structure 22 are displaced relative to each other, as shown in FIG.
(Or FIG. 6). That is, in the inner expansion joint structure 16, the support plate 28 provided on the one frame 2 acts so as to push the second plate member 40 of the cover plate 30 inward (or from the second plate member 40). Separate). Also at this time,
As described above, the coil spring 56 serves to cover the cover plate 30.
Of the first plate member 38 is urged toward the support plate 28 in the outward direction, that is, in the direction indicated by the arrow 50, and the balancer 70 moves the second plate member 40 toward the support plate 28 in the outward direction, that is, Since the second plate member 40 is urged in the direction indicated by the arrow 66, the second plate member 40 is relatively swung relative to the first plate member 38 via the hinge 60 to the outside indicated by the arrow 66, and the second plate member 40 is rotated.
Of the first and second plate members 38, 4 by elastically pressure-contacting a corner of the support plate 28.
0 is elastically held in the state shown in FIG. 5 (or the lower surface of the first plate member 38 abuts against the bracket 52, and is held at the predetermined angular position, and
Plate member 40 is rotated relative to the first plate member 38 in the direction indicated by arrow 66 and is held in the state shown in FIG. 6). Therefore, FIG. 5 (or FIG. 6)
In this state, the second plate portion 40 of the cover plate 30 is pivoted outward with respect to the first plate portion 38 about the hinge 60, so that the second plate portion 40 is inside the one frame 2. It does not project largely inward beyond the wall portion 12 (or the second plate member 4
0 covers the gap between the inner side wall portion 14 of the other body 4 and the inner side wall portion 12 of the one body 2). Thus, sufficient safety for the passage side is ensured.

Further, in the outer expansion joint structure 22, the pantograph body 108 has hinges 116, 12 at both ends.
The pantograph body 108, which is pivoted relative to the skeletons 2 and 4 by 0, pushes the outer cover plate 74 from the inside to the outside (or the other skeleton body). 4 support members 76 separate from the outer cover plate 74). Also at this time, as described above, the coil spring 94 urges the outer cover plate 74 inward as indicated by the arrow 83, so that the outer cover plate 74 is elastically pressed against the pantograph body 108,
It is held in this pressed state and is prevented from being further swung beyond this state (or the outer cover plate 74 is held in the predetermined angular position by its lower surface abutting the swivel prevention member 90). ). Therefore, also in the outer expansion joint structure 22, the outer cover plate 74 is prevented from significantly protruding to the outside.

The above-described movement shown in FIG. 6 is a case where one frame 2 is relatively displaced downward with respect to the other frame 4 in FIG. 1, and when the displacement is small, the first frame 2 is moved. The inward turning movement of the plate member 38 is reduced. In addition, the movement shown in FIG.
1 is relatively displaced upward in FIG. 1 with respect to the other skeleton 4, and when the above-mentioned displacement is small, it is easy to understand that the second plate of the cover plate 30
The front end of the plate member 40 is held in a state of being supported by the support plate 28.

Further, FIGS. 3 to 6 show a pair of skeletons 2 and 4.
Shows the states when they are displaced toward and away from each other and in the direction perpendicular to these directions, respectively, but in the case of an actual earthquake, etc., these displacements are combined, and therefore the inner expansion joint The combination of movements of the structure 16 and the outer expansion joint structure 22 is a combination of the displacements of FIGS.

Although one embodiment of the expansion joint device according to the present invention has been described above, the present invention is not limited to this embodiment, and various variations and modifications can be made without departing from the scope of the present invention. Is.

For example, in the illustrated embodiment, the support plate 28 of the inner expansion joint structure 16 and the outer cover plate 74 of the outer expansion joint structure 22 are provided on one of the frames 2, and the inner expansion joint is provided on the other frame 4. Although the cover plate 30 of the structure 16 and the support member 76 of the outer expansion joint structure 22 are provided, instead of this, the support plate 28 and the support member 76 are provided on the one frame 2 and the other frame 4 is provided. Alternatively, the cover plate 30 and the outer cover plate 74 may be provided.

Further, for example, in the illustrated embodiment, the support plate 28 is formed substantially flat, and the tip of the cover plate 30 of the inner expansion joint structure 16 is simply supported by the support plate 28. Similar to the support structure for the outer cover plate 74 of the outer expansion joint structure 16, it is possible to provide a recess in the support plate 28 and support the cover plate 30 in the recess. Can make the inner surface of the cover plate 30 flush with the inner surface of the inner wall portion 12.

[0028]

According to the expansion joint device of claim 1 of the present invention, the support plate is provided on one of the frames, and the cover plate is rotatably attached to the other frame, and the tip portion of the cover plate is the aforesaid part. As it is supported by the support plate,
The cover plate can be reliably supported between the other frame and the support plate. The cover plate is composed of first and second plate members pivotally connected to each other. Since the first plate member is pivotally connected to the other body, the first plate member for the other body can be rotated.
By the pivoting movement of the plate member and the pivoting movement of the second plate member with respect to the first plate member, the displacement can be absorbed even if the pair of skeletons are relatively displaced. Further, the first plate member is connected to a first spring biasing means for biasing the first plate member toward the support plate, and the second plate member is spring biased toward the support plate. Since the second spring urging means is connected, it is possible to reliably prevent the first and second plate members from significantly protruding.

Further, according to the expansion joint device of the second aspect of the present invention, the inner expansion joint mechanism and the outer expansion joint mechanism are provided, and the cover formed of the first and second plate members in the inner expansion joint structure. Since the plate is used, the protrusion of the cover plate can be suppressed to the inside of the gap between the pair of skeletons, which allows passage through the passage when, for example, the passage is formed by the inner expansion joint structure. It is possible to secure sufficient safety for people. Further, the outer expansion joint structure includes an outer cover plate, a support member that supports a tip portion of the outer cover plate, a swivel motion blocking member that blocks swivel motion of the outer cover plate beyond a predetermined angular position, and an outer cover plate. Since the third urging means for urging the spring toward the predetermined angular position is provided, it is possible to prevent the outer cover plate from largely protruding outward while allowing a large relative displacement of the pair of skeletons. You can Further, since the expandable and contractible pantograph body is provided between the pair of skeletons, the pantograph body prevents the distal end portion of the outer cover plate from largely moving beyond the support member.

[Brief description of drawings]

FIG. 1 is a horizontal sectional view showing an embodiment of an expansion joint device according to the present invention.

FIG. 2 is a plan view showing a pantograph body in the expansion joint device of FIG.

FIG. 3 is a simplified horizontal cross-sectional view for explaining the movement of the expansion joint device when the pair of skeletons are displaced in a direction in which they are separated from each other.

FIG. 4 is a simplified horizontal cross-sectional view for explaining the movement of the expansion joint device when the pair of skeletons are displaced in a direction in which they approach each other.

FIG. 5 is a simplified horizontal cross-sectional view for explaining the movement of the expansion joint device when the pair of skeletons are displaced to one side in the lateral direction.

FIG. 6 is a simplified horizontal sectional view for explaining the movement of the expansion joint device when the pair of skeletons are displaced to the other side in the lateral direction.

[Explanation of symbols]

2,4 body 6,8 outer wall 12, 14 Inner wall 16 Inner expansion joint structure 18, 20 Outer wall 22 Outside expansion joint structure 28 Support plate 30 cover plate 38 First Plate Member 40 Second plate member 56 Coil spring (first urging means) 68 Second urging means 74 Outer cover plate 76 Support member 94 Coil spring (third biasing means) 108 Pantograph body 122 Water stop plate 124 Fireproof zone

Claims (2)

(57) [Claims] 1. A support plate which is provided on one of a pair of frames and extends toward the other frame, and a cover plate which is provided on the other frame and whose tip is supported by the support plate, The cover plate is composed of first and second plate members rotatably connected to each other, and the first plate member is rotatably attached to the other frame, and the first plate member is attached to the first plate member. Is connected to a first urging means for urging the first plate member toward the support plate with respect to the other frame, and the second plate member is connected to the first plate. An expansion joint device, wherein a second urging means for urging the second plate member toward the support plate by a spring is connected to the member. 2. The support plate and the cover plate constitute an inner expansion joint structure, and an outer expansion joint structure is disposed outside the inner expansion joint structure, wherein the outer expansion joint structure is provided. The body includes an outer cover plate rotatably mounted on one of the pair of skeletons, a support member provided on the other of the outer cover plates for supporting a tip portion of the outer cover plate, and the outer cover plate. A swivel prevention member for preventing swivel motion exceeding a predetermined angle position, a third biasing means mounted on the outer cover plate for spring biasing the outer cover plate toward the swivel blocking member, and the outer cover. An expandable pantograph body mounted between a pair of skeletons inside the plate, and a part of the outer cover plate abuts against the swivel prevention member. This prevents the outer cover plate from pivoting beyond the predetermined angular position, and the pantograph body prevents the distal end portion of the outer cover plate from significantly moving beyond the support member. The expansion joint device according to claim 1.