JP2828619B2 - Expansion joint device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion joint device used for allowing relative displacement between two vertically adjacent buildings at an interval and closing a gap between the buildings.

[0002]

2. Description of the Related Art FIG. 5 is a vertical sectional view showing a typical prior art expansion joint device 1. Such a prior art includes:
For example, it is disclosed in Japanese Utility Model Publication No. 63-44487. The expansion joint device 1 is provided with two adjacent
Is provided so as to cover the gap between the two
And a joint receiving body 4 attached to the upper frame.
The joint receiving body 4 is assembled such that two long members 10 and 11 each having a substantially L-shaped cross section are opposed to each other so as to form a concave groove 15 that opens downward.
Is attached to the lower end along the outer wall surface 2a. The joint body 5 has a substantially inverted L-shaped cross section.
The plate-shaped packing material 6 provided at the upper end of the rising portion 8 extending upward is slidably fitted into the concave groove 15 of the joint receiving main body 4, bent from the lower end of the rising portion 8, and outer wall of the upper frame 2. An inclined portion 9 that extends obliquely forward (to the left in FIG. 5) beyond 2a is mounted on the lower frame 3.

[0003] At the lower end of the long member 10 of the joint receiving body 4, a sliding contact packing member 7 made of a resilient material is attached to close the gap between the inclined portion 9 of the joint body 5 and the joint receiving body 4. Can be

[0004] The plate-like packing material 6 comprises a joint receiving main body 4.
The front and rear ends resiliently and slidably fit into the concave groove 15 in the vertical direction, which is the vertical direction, and the horizontal direction, which is the vertical direction with respect to the plane of FIG.

[0005] Behind the expansion joint device 1 (to the right in FIG. 5), a flushing 1 for sealing the rear of the expansion joint device 1 is provided.
2 and a water receiver 1 provided at the lower end of the flushing 12
3 and a drain pipe 14 for discharging water from the water receiver 13 are provided.

With this configuration, even if each of the skeletons 2 and 3 is displaced relatively vertically close to or away from each other due to vibration such as an earthquake, the skeletons 2 and 3 are inserted into the concave grooves 15 of the joint receiving main body 4. Plate packing material 6
Slides in the vertical direction, which is the insertion direction, and absorbs vertical displacement. Similarly, the relative displacement of the frames 2 and 3 in the front-rear direction is absorbed by the sliding of the plate-like packing material 6 and the inclined portion 9 and the sliding contact packing material 7. In addition, the relative displacement of each of the frames 2, 3 can be absorbed by the sliding of the plate-like packing material 6 and the inclined portion 9 and the sliding contact packing material 7 in the lateral displacement of each of the frames 2, 3. In this way, the expansion joint device 1 absorbs the relative displacement between the frames 2, 3 and closes the gap between the frames 2, 3 to prevent rainwater or the like from entering.

[0007]

In such a conventional expansion joint device 1, since the plate-like packing material 6 is configured to slide in the concave groove 15 to absorb the relative displacement, the expansion joint device is used. The relative displacement of the skeletons 2 and 3 that can be absorbed by the elongated member 11 forming the concave groove 15
6, limited to length. Since each of the frames 2, 3 is constructed on the same ground, the relative displacement of each of the frames 2, 3 caused by an earthquake or the like is relatively small in the vertical direction. The relative displacement in the front-rear direction caused by the difference in the cycle is the largest.

However, in order to allow such a large displacement in the front-rear direction in the conventional expansion joint device 1, the hanging portion 16 of the long material 11 is extended downward, and the inclined portion 9 of the joint body 5 is moved forward. Therefore, there is a problem that the configuration of the expansion joint device 1 becomes large. In addition, the expansion joint device 1
The joint main body 5 having the inclined portion 9 is provided so as to protrude forward, which causes a problem that the expansion joint device 1 is easily visually recognized from the outside and the appearance is deteriorated.

Therefore, an object of the present invention is to allow a relatively large displacement of each frame, even if the displacement is large.
An object of the present invention is to provide an expansion joint device that keeps a gap closed and prevents rainwater from entering the gap.

[0010]

According to the present invention, two skeletons which are vertically adjacent to each other with a space therebetween are arranged, and one of the skeletons arranged above is hinged to a position retracted from its outer wall surface. The upper end of the cover plate is provided so as to be angularly displaceable, and the lower end of the cover plate is supported on the upper wall surface of the other skeleton extending beyond the outer wall surface of the one skeleton, and the angular displacement axis of the hinge is A guide roller is provided that is rotatable about a rotation axis that is shifted to the outdoor side from one plane along the cover plate, and the cover plate is formed from an opening end of the gap that opens on the outer wall surface of one of the frames. The expansion joint device is characterized in that a lower end of the cover plate is spring-biased by a biasing means in a direction in which the lower end moves inward with the angular displacement axis as a center of angular displacement. According to the present invention, the upper end of the cover plate is provided on one of the skeletons by a hinge so as to be angularly displaceable, and the lower end of the cover plate is supported on the upper wall surface of the other skeleton by the guide roller, and is moved inward. It is spring-biased in the direction of movement, for example by a spring realized by a coil spring. Since the rotation axis of the guide roller includes the angular displacement axis of the hinge and is provided to be shifted to the outdoor side from one plane along the cover plate, the cover plate is supported by the guide roller on the upper wall surface of the other body. In the state, the direction in which the lower end of the cover plate moves inward from the open end of the gap,
In other words, backward angular displacement is prevented. Therefore, the cover plate closes the gap between the frames, and prevents rainwater from entering the gap. When each cover body is relatively displaced in the front-rear direction, which is a direction perpendicular to the rotation axis of the guide roller on a horizontal plane, for example, due to an earthquake or the like in a state where the cover plate closes the gap, the guide roller moves to the other body. Guided along the upper wall. Therefore, even if each frame is relatively displaced in the front-rear direction, the gap can always be kept closed by the cover plate.
When the respective frames are relatively displaced in a direction approaching each other in the vertical direction, the guide roller is guided forward on the upper wall surface of the other frame, and the cover plate is angularly displaced forward against the bias of the spring. . In this way, even if the respective frames are relatively displaced in a direction approaching each other, it is possible to keep the gap always closed by the cover plate and to prevent rainwater from entering. Further, since the cover plate is provided at a position retracted from the outer wall surface of one of the skeletons, it is difficult for the cover plate to be visually recognized from the outside, thereby preventing the appearance from being deteriorated. Further, even if the cover plate is opened forward due to wind pressure or a pressure difference between the outside and the inside of the cover plate, the cover is immediately closed by the urging means, so that the gap can always be kept closed. In addition, when each skeleton is relatively displaced in the left and right direction parallel to the angular displacement axis of the hinge due to an earthquake or the like, the guide roller slides on the upper wall surface of the other skeleton in the left and right direction, thereby causing each skeleton to relatively move. Even if displacement occurs in the left and right direction, allow the displacement,
The cover plate keeps the gap closed at all times. Even if the cover plate is displaced in a direction including these relative displacements at the same time, the cover plate can always keep the gap closed.

[0011]

FIG. 1 is a vertical sectional view showing an expansion joint device 20 according to an embodiment of the present invention. In addition,
In FIG. 1, front-rear directions X1 and X2 are left-right directions on the paper surface of FIG. 1, and left-right directions Y1 and Y2 are directions toward a depth side and a front side with respect to the paper surface of FIG. , Z2 are vertical in the plane of FIG. The same applies to FIGS. 2, 3 and 4 to be described later.

In an opening formed in one of the skeletons 22,
For example, the other skeleton 23 such as an atrium is provided so as to be partially fitted therein. Lower wall 32 of one skeleton 22
And an upper wall 27 of the other skeleton 23, a gap 21 is formed, and the expansion joint device 20 is provided to cover the gap 21. An upper end portion 26a of a cover plate 26 is provided on one of the skeletons 22 disposed above at a position retracted backward Y2 from the outer wall surface 24 by a hinge 28 so as to be angularly displaceable. At 26b, a guide roller 30 supported on the upper wall surface 27 of the other skeleton 23 and having a rotation axis 29 parallel to the angular displacement axis 28 of the hinge is provided. The lower end portion 26b of the cover plate 26 extends from the opening end of the gap 21 that opens on the outer wall surface 24 of one of the skeletons 22, that is, on a virtual plane including the outer wall surface 24, with the angular displacement axis 28 as the center of angular displacement. The spring 31 is biased inward, that is, in the direction of moving to the rear X2 by a spring 31 serving as a biasing means.

The upper part of the other body 23 has a base material 33 made of steel or the like. On the base material 33, for example, an extruded aluminum alloy material is used.
A plurality of attachment members 34 extending in the left-right directions Y1 and Y2 at intervals in the front-rear directions X1 and X2 are fixed on the base material 33. An outer wall cover member 35 made of, for example, an aluminum alloy or glass is provided between the mounting members 34 so as to cover the base material 33, and extends along the mounting member 34 on the mounting members 34 between the outer wall cover members 35. A band-shaped pressing member 36 is attached, a packing 37 is provided between the pressing member 36 and the mounting member 34, and a sealing material 38 is filled between the packing 37, the mounting member 34, and the outer wall cover member 35. Is done.

At the rear end of the base material 33, a plurality of rising members 40 rising upward Z1 via connecting pieces 39 made of, for example, angle iron, are provided at intervals in the left and right directions Y1 and Y2. It is fixed to the member 33 by, for example, welding. The rearmost X from the upper end of the rising member 40
A flat drain plate 42 for guiding rainwater or the like to the front X1 is provided to be inclined over the pressing member 36 arranged at 2. On the lower surface of the drainage plate 42, left and right directions Y1, Y2
Are provided with a plurality of reinforcing members 41 spaced apart from each other. The drain plate 42 has, for example, a gradient of about 11%, and drains rainwater or the like that has entered behind the cover plate 26 forward.

The rear part of the drainage plate 42 is bent upward and is fixed to the rising member 40 by screws, and the upper end part is folded downward from the front to form a rain return 43. As a result, it is possible to prevent rainwater or the like from entering the rear X2 side from the rain return 43. On the lower wall surface 32 of one of the skeletons 22 above the rain stopper 43, a long water-stop plate rim 45 is provided in the left and right directions Y1 and Y2. A waterproof plate 44 made of a material having flexibility and elasticity over 43, for example, an ethylene propylene rubber sheet is provided. Such a water stop plate 44 prevents rainwater that has entered the rear X2 than the cover plate 26 from entering the rear X2 side of the water stop plate 44.

FIG. 2 is an enlarged sectional view showing the expansion joint device 20. An edge member 50 having an L-shaped cross section and extending in the left and right Y1 and Y2 directions is formed on the lower wall surface 32 of one of the skeletons 22.
Are fixed by bolts. A spring attachment piece 5 which is bent rearward X2 and to which the spring 31 is attached
1 and a decorative cover 52 covering the upper end 26a of the cover plate 26 are attached by bolts 48 and screws, respectively. A packing 56 is provided between the upper surface of the decorative cover 52 and the lower wall surface 32 of one of the skeletons 22 to prevent rainwater or the like from entering the edge member 50 side.

One flat hinge piece 57 of the hinge 25 is fixed to the spring mounting piece 51 with a screw, and the other hinge piece 58 is bent in an L-shape to cover the cover plate 2.
6 is fixed to the upper end portion 26a on the back side (the rear X2 side) of the cover plate 26 via the attachment piece 59 attached to the cover plate 6. The left and right directions Y1, Y
2 that are spaced apart from each other and extend in the vertical directions Z1 and Z2.
A plurality of 0s are provided.

The rear end of the spring mounting piece 51 is slightly bent downward, and one end of the spring 31 is fixed. The spring 31 is, for example, a tension coil spring made of stainless steel. A locking member 61 for locking the other end of the spring 31 is fixed slightly above the center of the back surface of the cover plate 26 in the vertical direction, and the spring 31 is provided from the spring mounting piece 51 to the locking member 61. The spring 31 and the spring mounting piece 51 are displaceably mounted by a screw rod 46 and a nut 47. By adjusting the nut 47, the spring force of the spring 31 can be adjusted.
The spring 31 is inserted into a cylindrical protective member 54 made of, for example, polyvinyl chloride, and the coil-shaped portion of the spring 31 is entirely surrounded by the protective member 54.

At the other end 26b of the cover plate 26,
A plurality of guide roller mounting members 62 are provided at intervals in the left-right direction Y1 and Y2.
Has a rotation axis 29 parallel to the angular displacement axis 28 of the hinge 25.
Is rotatably provided.

The lower end 26b of the cover plate 26 is bent forward in an inverted L-shape to cover the front of the guide roller 30,
The other skeleton 23 extends downward to the vicinity of the upper wall surface 27. At the lower end of the cover plate 26, a sliding contact packing 55 made of a material having flexibility and elasticity is provided from the lower end of the cover plate 26 to the upper wall surface 27 of the other frame 23, with the lower end curved forward. Can be Therefore, the sliding packing 55 prevents rainwater or the like from entering the rear of the cover plate 26.

The guide roller 30 is made of, for example, nylon, and is supported on the other frame 23 by abutting on a wedge member 53 fixed on the pressing member 36. The wedge member 53 has an inclined surface which is inclined downward Z2 as the upper surface goes forward X1.
Extends to Y2. The guide roller 30 is provided with such a wedge member 53.
, The lower end 26 b of the cover plate 26 is prevented from being angularly displaced rearward from the wedge member 53 by the spring force of the spring 31. In addition, the rotation axis 29 of the guide roller 30 is provided outside the angular displacement axis 28 of the hinge 25 on the outdoor side, that is, on the front X1 side, so that the lower end 26 of the cover plate 26 is
The angular displacement of b to the rear X2 side is reliably prevented.

Contact point P1 between guide roller 30 and wedge member 53
When the cover plate 26 is angularly displaced around the angular displacement axis 28 of the hinge 25, the position of the guide roller 30 at the position furthest away from the angular displacement axis 28 is at least larger than the arc-shaped movement path at the tip of the guide roller 30. It is selected on the axis 28 side. By selecting in this manner, the cover plate 26
Can be reliably prevented from moving toward the rear X2 side.
Further, a configuration in which the wedge member 53 is not provided may be adopted.

The front X1 side end of the drainage plate 42 is fixed to the rear X2 side end of the pressing member 36 via a connecting member 63 having an L-shaped cross section. This drain plate 4
A packing 64 is provided between the holding member 36 and the holding member 36 to prevent water from entering the screw side, whereby rainwater or the like enters the base material 33 through a screw hole into which the screw is screwed. Is prevented.

When the other frame 23 is displaced rearward X2 relative to one frame 22, the cover plate 26 is slightly moved rearward X2 around the angular displacement axis 28 of the hinge 26 by the bias of the spring 31. Angular displacement. This angular displacement is prevented by the contact of one hinge piece 57 with the bent portion of the other hinge piece 58 bent in an L-shape. At this time, the height position of the rotation axis 29 of the guide roller 30 is located lower than the height position of the front end P2 of the drainage plate 42. Accordingly, when the other body 23 is displaced rearward X2 relative to the one body 22 and then displaced forward X1 again, the cover plate 26 is placed on the drainage plate 42 from the front end P2 of the drainage plate 42. It is possible to prevent the guide roller 30 from running up in a state of being angularly displaced rearward. Therefore, when the other vehicle body 23 is angularly displaced upward while the cover plate 26 angularly displaced rearward rides on the drainage plate 42, the expansion joint device 1 is prevented from being damaged.

At one end of the decorative cover 52 facing the cover plate 26, a semi-circular packing 65 made of a material having a semi-circular cross section resiliently abuts the cover plate 26 by the decorative cover 52. Provided. Even when the cover plate 26 is angularly displaced, the semicircular packing 65 always resiliently comes into contact with the upper end 26a of the cover plate 26, thereby preventing rainwater from entering from outside. It is.

FIG. 3 is a schematic diagram showing a state when the respective frames 22, 23 are relatively displaced. FIG. 3A is a schematic diagram illustrating a state where one skeleton 22 is relatively displaced forward X1 with respect to the other skeleton 23. When one skeleton 22 is relatively displaced forward X1 due to an earthquake or the like, the guide roller 30 is guided in the forward X1 direction while rotating on the upper wall surface 27 of the other skeleton 23. When the guide roller 30 is guided on the upper wall surface 27, the distance between the lower end of the cover plate 26 and the upper wall surface 27 is
Is always constant. Therefore, the sliding contact packing 55 always comes into contact with the upper wall surface 27 in an optimal state for stopping water. Therefore, the sliding packing 55 is prevented from being damaged by being sandwiched between the lower end of the cover plate 26 and the upper wall surface 27.

FIG. 3 (2) is a schematic view showing a state where one skeleton 22 is displaced rearward X2 relative to the other skeleton 23. When one of the skeletons 22 is relatively displaced rearward X2, the guide roller 30 rides on the drainage plate 42, the guide roller 30 is urged on the drainage plate 42 by the spring 31, and the cover plate 26 is angularly displaced forward. It is guided on the drain plate 42. At this time, the sliding packing 5
5 is in contact with the drainage plate 42 to reliably stop water. When one of the skeletons 22 is again displaced forward relative to the other skeleton 23 from such a state, the guide roller 30 guides the drain plate 42 forward with the cover plate 26 angularly displaced forward. Then, it is guided onto the upper wall surface 27 of the frame 23 through the front end P2 of the drainage plate 42.

FIG. 3 (3) is a schematic view showing a state in which the respective frames 22, 23 approach each other, for example, when the other frame 23 is relatively displaced upward Z1 relative to the one frame 22. It is. The guide roller 30 is guided forward according to the relative displacement of the other body 23 in the upward direction Z1.
At this time, the cover plate 2 is
6 is urged rearward, so that the guide roller 30 surely comes into contact with the upper wall surface 27, is driven to rotate, and is guided forward.

Each of the frames 22, 23 is relatively moved in the left-right direction Y.
When displaced to Y1, Y2, the guide roller 30 slides on the wedge member 53 in the left-right direction Y1, Y2. Also in this case, the sliding packing 55 always comes into contact with the upper wall surface 27 of the other skeleton 23 to stop water. Thus, the displacement of each of the frames 22, 23 in the left-right direction can be allowed.

As described above, when each of the frames 22 and 23 is displaced relative to each other, the cover plate 26 can always keep the gap 21 closed so as to prevent rainwater from entering the gap 21. Furthermore, even if such relative displacements do not occur individually, the cover plate 26 can keep the gap 21 closed even if the relative displacements occur simultaneously.

Further, since the cover plate 26 is attached at a position retracted from the outer wall surface 24 of one of the skeletons 22, it is difficult for the cover plate 26 to be seen from the outside. Therefore, for example, it extends in the left-right direction Y1, Y2,
A plurality of cover plates 26 arranged adjacent to each other in the left and right Y1 and Y2 directions are hard to be visually recognized from the outside even if each cover plate 26 is displaced in the front and rear direction due to vibration such as an earthquake, so that the appearance may be deteriorated. Can be prevented.

When the gap 21 is wide, the length of the cover plate 26 in the vertical direction Z1, Z2 is extended, and the gap 2 is increased.
When 1 is small, the expansion joint device 20 according to the size of the gap can be easily formed by shortening the length in the vertical direction Z1, Z2.

The expansion joint device 20 is constructed in the following manner. First, the water stop plate 44 is sandwiched between the water stop plate edge 45 and the rain return strip 43 and screwed, and then the edge 50 is placed under the one frame 22. The wedge member 53 is fixed to the wall surface 32 with bolts, and the wedge member 53 is fixed to the upper wall surface 27 of the other skeleton 23. Thereafter, the cover plate 26 to which the hinge 25, the spring mounting piece 51, the guide roller 30 and the spring 31 have been previously assembled is attached to the edge material 5
0 is fixed with bolts 48. Finally, the decorative cover 52 is fixed to the edge member 50 via the spring attachment piece 51 with a screw, and the packing 56 is provided. As described above, since the cover plate 26 can be assembled in advance, construction work on site can be easily performed, and workability is improved.

FIG. 4 is a vertical sectional view showing an expansion joint device 69 according to another embodiment of the present invention. In addition, FIG.
Portions corresponding to the embodiment shown in FIG. 3 are denoted by the same reference numerals. The expansion joint device 69 is similar to the expansion joint device 20, and it should be noted that, instead of the spring 31, a winding attachment urging device 70 as urging means is provided. The winding attachment device 70 is provided with a rope 72 made of, for example, a wire, and one end of the rope 72 is locked and wound around, and the spring 72 is moved in a predetermined winding direction A (counterclockwise in FIG. 4). The take-up reel 70 is urged, and the other end of the cord 72 is engaged with the spring mounting piece 51 of the cover plate 26. The take-up reel 71 has a spiral spring called a mainspring mounted therein, and urges the spring in the take-up direction A. The take-up reel 71 is rotatable about a rotation axis 73 parallel to the angular displacement axis 28 of the hinge 25.
The take-up reel support member 74 is fixed to the lower wall surface 32 of one of the skeletons 22 behind the cover plate 26 by bolts. Thus, the cover plate 2
The spring 6 is spring-biased in the winding direction A, that is, in the rearward direction X2 by the rope 72 wound around the take-up reel 71. Therefore, even if the cover plate 26 is largely opened forward X1, the winding mounting biasing device 70 Can allow the cover plate 26 to be largely displaced, and always bias the cover plate 26 backward X2. Further, since the winding mounting biasing device 70 is biased by a spiral spring, the biasing force of the spring can be kept substantially constant regardless of the amount of extension of the cord 72, so that the cover plate 26 is greatly angularly displaced forward. Thus, the cover plate 26 can be smoothly returned to the original position. Furthermore, the winding attachment urging device 70 is
As shown in FIG. 7, the spring is biased in a direction substantially perpendicular to the cover plate 26 by mounting the cover plate 26 at a distance rearward from the cover plate 26, and the spring biasing force of the winding mounting biasing device 70 is applied to the cover plate 26. Can be effectively acted on.

[0035]

As described above, according to the present invention, the upper end of the cover plate is provided on one of the skeletons by a hinge so as to be angularly displaceable, and the other end is supported on the upper wall surface of the other skeleton by the guide roller. And cover the voids formed between the frames. The rotation axis of the guide roller includes the angular displacement axis of the hinge, and is provided so as to be shifted to the outdoor side from a plane along the cover plate.The lower end of the cover plate is moved inward from the open end of the gap by the spring by the spring. Since the spring is biased in the moving direction, the guide roller is supported in contact with the upper wall surface of the other skeleton, thereby reliably closing the gap and preventing rainwater from entering the gap. For example, when each skeleton is relatively displaced in the front-rear direction due to an earthquake or the like, the guide roller is guided on the upper wall surface of the other skeleton, and the gap can be always kept closed. As described above, since the relative displacement in the front-rear direction is absorbed by the cover plate having the guide roller, a relatively large displacement in the front-rear direction can be absorbed. When the frames are relatively displaced in the direction of approaching each other, the guide roller's angular displacement axis is shifted to the outdoor side from the hinge's angular displacement axis. Guided forward, the cover plate is angularly displaced forward. At this time, since the cover plate is provided with a spring,
The guide roller is securely supported on the upper wall of the other skeleton,
The cover plate can reliably close the gap. Further, when each frame is relatively displaced in the left-right direction parallel to the angular displacement axis of the hinge, the guide roller slides on the upper wall surface in the left-right direction. Also in this case, the cover plate reliably closes the gap and prevents rainwater from entering the gap. Even if the frame body is relatively displaced in this way, the cover plate can reliably close the gap and prevent rainwater from entering the gap. Even if such relative displacement occurs simultaneously, the cover plate can reliably close the gap.

Further, since the cover plate is attached at a position retracted from the outer wall surface of one of the skeletons, it is difficult for the cover plate to be visually recognized from the outside, and the appearance is prevented from being impaired.

[Brief description of the drawings]

FIG. 1 shows an expansion joint device 20 according to an embodiment of the present invention.
FIG.

FIG. 2 is an enlarged sectional view showing the expansion joint device 20.

FIG. 3 is a schematic view of the expansion joint device 20 showing a state when each of the frames 22 and 23 is relatively displaced, and FIG. 3A shows a state when one of the frames 22 is relatively displaced forward X1. FIG. 3 (2) is a schematic diagram in which one of the frames 22
FIG. 3 is a schematic view showing a state when the relative displacement is performed in FIG.
(3) is a schematic diagram showing a state when the other skeleton 23 is displaced upward Z1 relative to the one skeleton 22.

FIG. 4 is an expansion joint device 6 according to another embodiment of the present invention.
FIG. 9 is a vertical sectional view showing 9.

FIG. 5 is a vertical sectional view showing a conventional expansion joint device 1.

[Explanation of symbols]

 20, 69 Expansion joint device 21 Air gap 22, 23 Body 24 Outer wall surface 25 Hinge 26 Cover plate 27 Upper wall surface 28 Angular displacement axis 29 Rotation axis 30 Guide roller 31 Spring 32 Lower wall 33 Base material 42 Drain plate 53 Wedge member 70 Wedge mounting Force means 71 Take-up reel 72 Cable

Claims (1)

(57) [Claims] An upper frame is provided with two frames vertically adjacent to each other with a space therebetween, and one of the frames disposed above the upper frame is angularly displaced by a hinge at a position retracted from its outer wall surface. The lower end portion of the cover plate is supported on the upper wall surface of the other skeleton extending beyond the outer wall surface of the one skeleton, includes the angular displacement axis of the hinge, and extends along the cover plate. A guide roller is provided that is rotatable about a rotation axis that is shifted to the outdoor side from the plane. An expansion joint device which is biased by a biasing means in a direction in which the displacement axis moves inward with the displacement axis as a center of angular displacement.