JP3136235B2 - Expansion joint structure for entering corner - 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 structure for a corner.

[0002]

2. Description of the Related Art Conventionally, as an expansion joint structure for covering a space between a pair of skeletons, there is conventionally known an expansion joint structure in which a first boss is protruded from one skeleton.
In some cases, a cover and a second cover protruding from the other body are provided, and the first cover and the second cover are overlapped at the interval.

[0003]

However, the surface corresponding to the second frame of the first frame, the roof surface of the second frame lower than the first frame, and the second frame corresponding to the second frame are perpendicular to the surface corresponding to the second frame. In the corner formed with the wall surface to be formed, a gap that opens to the side is formed between the wall surface and the first skeleton, and this gap is formed by the first joint of the conventional joint structure. The second cover could not be covered.

Therefore, in the present invention, the gap between the first and second frames and the gap opening laterally between the wall and the first frame are securely covered at the corners. It is another object of the present invention to provide an in-corner expansion joint structure which can perform the first and second frame changes.

[0005]

In order to achieve the above-mentioned object, a first expansion joint structure for a corner according to the present invention comprises:
A corner formed by a second skeleton corresponding surface of the skeleton, a roof surface of a second skeleton lower than the first skeleton, and a wall surface erected from the roof surface and orthogonal to the second skeleton corresponding surface. The expansion joint structure for a corner provided in the section, wherein the first frame 1
A first horizontal cover for covering the space between the first and second frames from above, and a horizontal extension plate disposed on the second frame below the first cover. A second cover having a portion is provided, and a rising wall substantially parallel to the width direction of the interval portion is erected at an inner end in the longitudinal direction of the first cover, and further, between the rising wall and the wall surface. A first swinging vertical wall covering a side opening of a first gap formed in the first frame is pivotally connected to the second frame side, and the wall surface, the first swinging vertical wall, the first cover, and the first A second swinging vertical wall covering a side opening of a second gap surrounded by the second cover;
It is pivotally attached to the skeleton side.

Further, a second corner expansion joint structure according to the present invention is characterized in that the surface corresponding to the second frame of the first frame, the roof surface of the second frame lower than the first frame, and the top surface of the roof frame. And an expansion joint structure for a corner provided at a corner formed with the wall surface orthogonal to the surface corresponding to the second frame, wherein the first frame includes a first frame and a second frame. A horizontal first cover for covering the interval portion from above, and a second cover having a horizontal extending plate portion provided below the first cover on the second frame; and A lateral opening of a gap formed between the first skeleton and the wall surface is covered with a vertical wall member, and further, on the back side of the vertical wall member, the first skeleton is provided. A first auxiliary wall piece parallel to a plane perpendicular to the width direction of the gap portion is attached to the side, and the second auxiliary body piece is attached to the second frame side. A second auxiliary wall piece parallel to the width direction of the partition is attached, and the first and second auxiliary wall pieces are connected by a water stop plate and a prevention band arranged along the vertical direction. .

[0007] The third expansion joint structure for a corner according to the present invention comprises a surface corresponding to the second skeleton of the first skeleton, a top surface of the second skeleton lower than the first skeleton, and an erect surface from the top surface of the roof. And an expansion joint structure for a corner provided at a corner formed with the wall surface orthogonal to the surface corresponding to the second frame, wherein the first frame includes a first frame and a second frame. A horizontal first cover for covering the interval portion from above, and a second cover having a horizontal extending plate portion provided below the first cover on the second frame; and A vertical wall member covering a side opening of a gap formed between the first skeleton and the wall surface, and further comprising a second cover on a back surface side of the vertical wall member. A dish-shaped water receiving portion is provided on the upper surface of the device, and a drain pipe is connected to and connected to the dish-shaped water receiving portion.

[0008]

The gap between the first and second skeletons can be covered with the first and second covers, and the gap formed between the wall surface and the first skeleton (the first gap and the first gap). The side opening of the second gap can be covered with vertical wall members (first swing vertical wall and second swing vertical wall).

Since the first cover is provided on the first body and the second cover is provided on the second body, even if the first body and the second body fluctuate in the direction of approaching / separating from each other, the first cover is provided. -The second cover can follow this change. And the first
The oscillating vertical wall and the second oscillating vertical wall are pivotally attached to the second skeleton side, and can swing and follow the above-mentioned fluctuations, respectively, around the pivotal joints on the second skeleton side.

[0010] Further, in the apparatus provided with the water stoppage plate and the fire protection zone, it is possible to prevent the leakage of rainwater and the spread of fire.

[0011] Even if rainwater or the like infiltrates the back side of the vertical wall member, the rainwater is received by the dish-shaped water receiving portion, and the rainwater that has entered the water receiving portion is supplied to the outside via a drain pipe. Is discharged to

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.

FIG. 1, FIG. 2 and FIG. 3 show an expansion joint structure for a corner according to the present invention. This structure comprises a surface 2 corresponding to a second frame of a first frame 1 and a second frame lower than the first frame 1. It is provided at the corner 6 formed by the roof surface 4 of the second frame 3 and the wall surface 5 erected from the roof surface 4 and orthogonal to the second frame corresponding surface 2.

That is, the first and second frames 1, 1
A first horizontal cover 8 is provided to cover the gap 7 between the first and second frames 3 from above, and the first horizontal cover 8 is provided on the second frame 3.
Is provided with a second cover 9 having a horizontally extending plate portion 9a disposed at a position below the first cover 9a.

The first cover 8 comprises a first member 8a and a second member 8b, and the first member 8a is slightly inclined downward toward the second frame 3 as shown in FIG. One part 10
And, a hanging piece portion 11 hanging from the tip of the inclined piece portion 10,
The inclined piece 10 includes an upright piece 12 erected from the base end of the inclined piece 10 and an inclined piece 13 protruding from the upright piece 12 toward the first frame 1. The attached mounting piece 14 is the first frame 1
Is fixed to the fixing member 15.

The second member 8b includes a horizontal piece 16 and an upright piece 17 erected from the tip of the horizontal piece 16;
The base end of the horizontal piece 16 is fixed to the fixing member 15 of the first frame 1.

A connecting piece 18 having an L-shaped cross section is formed on the hanging piece 11 of the first member 8a, and a connecting piece 19 having an L-shaped cross section is formed on the standing piece 17 of the second member 8b. Is formed, and the connecting piece 18
And the rising portion of the connecting piece 19 are connected. And in the horizontal groove 20 formed by the connecting pieces 18 and 19,
Caulking material 21 is interposed. The connecting pieces 18 and 19 are attached to the reinforcing member 99 via fixing members such as screws.

At the inner end of the first cover 8 in the longitudinal direction, a rising wall 22 substantially parallel to the width direction of the spacing portion 7 is integrally formed as shown in FIG. That is, the first cover 8 and the rising wall 22 are integrated by welding or the like.

As shown in FIG. 3, the rising wall 22 includes a vertical wall portion 22a parallel to the width direction of the interval portion 7, and a stepped wall portion 22b connected to the vertical wall portion 22a. Staircase wall 22
b is the first, second, and third vertical portions 2 parallel to the vertical wall portion 22a.
3, 24, 25, a first connecting portion 26 connecting the vertical wall portion 22a and the first vertical portion 23, a second connecting portion 27 connecting the first vertical portion 23 and the second vertical portion 24, A third connecting portion connecting the second vertical portion and the third vertical portion;

Next, as shown in FIG. 2, the second cover 9 comprises a horizontal extending plate portion 9a and a hanging piece portion 9b hanging from the horizontal extending plate portion 9a. One part 9b
Are the first, second and third vertical pieces 29, 30, and 31, and the first and second vertical pieces.
A first inclined piece 32 connecting the vertical pieces 29, 30 and the second vertical piece;
30 and a second inclined piece 33 connecting the third vertical piece 31.

A reinforcing plate 34 is erected on the edge of the second frame 3 on the side of the space 7, and a horizontal extending plate portion of the second cover 9 is provided on the upper horizontal portion 34 a of the reinforcing plate 34. 9a. The reinforcing plate 34 is attached to a reinforcing member 35 made of an angle material fixed to the roof surface 4 of the second frame 3.

The third vertical piece 31 of the second cover 9 is fixed to a mounting piece 36 on the roof surface 4 of the second frame 3 with a fixing tool such as a screw.

By the way, between the first cover 8 and the second cover 9, a primary watertight packing 37 and a secondary watertight packing 37 are provided.
38 and are interposed.

The packing 37 for the primary water stop is a square cylindrical portion 37a.
And a tongue portion 37c connected to the upper end of the square tubular portion 37a via a horizontal plate portion 37b.
The cover 8 is attached to the second member 8b with a fixing tool such as a screw.

The secondary water-stopping packing 38 comprises a square tubular part 38a and a pair of holding pieces 38b, 38b hanging from the square tubular part 38a, between the holding pieces 38b, 38b. ,
The rising piece 39 of the horizontal extending plate portion 9a of the second cover 9 is interposed. Then, the holding pieces 38b, 38b and the rising piece 39 are integrated by bolt / nut coupling or the like.

That is, the primary waterproof packing 37 is attached to the first cover 8, and the secondary waterproof packing 38 is attached to the second cover 9.
To reliably prevent infiltration of rainwater or the like into the space 7 from between the first cover 8 and the second cover 9. The caulking material 21 is provided at the corner between the inner end face of the primary water stopping packing 37 and the second member 8b of the first cover 8.

A mounting plate 40 is fixed to the upper end of the second frame corresponding surface 2 of the first frame 1.
A fire protection zone 41 is attached to the reinforcing plate 34 on the skeleton 3 side.
Further, holding pieces 42, 42 are attached to the reinforcing plate 34 and the mounting plate 40, and a water blocking plate 43 is attached to the holding pieces 42, 42.

By the way, as shown in FIGS. 1 and 6, the first cover 8 has an inner end corresponding to the rising wall 22 as shown in FIGS.
A protruding portion 44 protruding toward the second skeleton 3 is provided. In addition, as shown in FIG.
The secondary watertight packing 38 extends to the projecting portion 44 of the cover 8, and a first bent portion 45 bent at a right angle to the second frame 3 side.
And a second bent portion bent at a right angle from the first bent portion 45
46, and the end face of the primary water-stop packing 37 is in contact with the first bent portion 45.

Thus, between the wall surface 5 of the second frame 3 and the first frame 1, there is formed a gap 47 opening laterally, that is, on the first and second cover sides. The opening 47a of the gap 47 is covered with a vertical wall member 48.

That is, the vertical wall member 48 is provided with the above-described rising wall.
22 and a first member interposed between the rising wall 22 and the wall surface 5.
A swing vertical wall 49 and a second swing vertical wall 50 disposed below the first swing vertical wall 49 are provided.

The first swing vertical wall 49 is, as shown in FIG.
It covers a side opening portion 51a of a first gap 51 formed between the rising wall 22 and the wall surface 5, and includes a main body 49a made of a flat plate, and a first main body 1 side of the main body 49a. And a bent piece portion 49b at the end, and a reinforcing member 52 is attached to the back surface of the main body 49a.

The bent piece 49b is composed of an inclined piece 53 facing the second connecting portion 27 of the rising wall 22 and a mounting piece 54 connected to the inclined piece 53. , Reinforcement members
One end of 52 is attached. A packing 55 having a substantially U-shaped cross section is attached to the inclined piece 53.

The first swinging vertical wall 49 is pivotally connected to the second frame 3. That is, a hinge member 56 is attached to the end of the main body 49a on the second frame 3 side, and swings about the shaft of the hinge member 56 as indicated by arrows A and B.

The hinge member 56 has one attachment piece 56a attached to the reinforcing member 52 and the other attachment piece 56b attached to the second frame 3.
Attached to the fixing member 57 on the side. The fixing member 57 is made of a plurality of angle members and the like, and is a holding frame body for holding the cubic 58.
Mounted on 59 ,.

Further, the first swing vertical wall 49 is pulled by the spring mechanism 60 so as to always swing in the direction of arrow B. That is, the resilient mechanism 60 includes a coil spring 60a, a covering body 60b for covering the coil spring 60a, and a mounting piece 60c for mounting the resilient mechanism 60 to the fixing member 57. The coil spring 60a has one end thereof. 61 is locked to the reinforcing member 52,
The other end 62 is attached to a screw shaft 63 attached to the attachment piece 60c. Therefore, the nut member 64 screwed to the screw shaft 63
Is screwed forward and backward by the coil spring 60a.
The tensile force of the swing vertical wall 49 can be adjusted.

A receiving plate 65 is attached to the second vertical portion 24 of the rising wall 22, and the mounting piece 54 of the first swing vertical wall 49 abuts on the receiving plate 65. In addition, the main body 49 of the first swing vertical wall 49
A vertical frame member 66 is interposed between a and the ridge 58, and the caulking material 21 is interposed between the vertical frame member 66 and the ridge 58.

As shown in FIG. 4, the second oscillating vertical wall 50 is surrounded by the wall 5, the first oscillating vertical wall 49, the first cover 8, and the second cover 9. Side opening of gap 67
67a, which is a cover for covering the body 50a,
And a bent piece 50b on the first body 1 side of the main body 50a, and a reinforcing member 69 is attached to the back surface of the main body 50a.

The bent piece portion 50b is composed of an inclined piece 72 facing the inclined face 71 of the end face 70 of the first cover 8, and a mounting piece 73 connected to the inclined piece 72. The one end of the reinforcing member 69 is attached thereto. And on the inclined piece 72,
A packing 74 having a substantially U-shaped cross section is attached.

The second swinging vertical wall 50 is pivotally connected to the second frame 3. That is, a hinge member 75 is attached to the end of the main body 50a on the second body 3 side, and swings around the shaft of the hinge member 75 as indicated by arrows A and B.

The hinge member 75 has one mounting piece 75a mounted on the reinforcing member 69 and the other mounting piece 75b mounted on the second frame 3.
It is attached to the fixing member 76 on the side. The fixing member 76 is
It is made of a plurality of angle members and attached to the holding frame 59.

The second swing vertical wall 50 is pulled by a resilient member 77 so as to always swing in the direction of arrow B. That is, the resilient member 77 is formed of a coil spring, and one end hook portion 77a thereof is engaged with the reinforcing member 69, and the other end hook portion 77a is hooked.
77 b is engaged with a mounting piece 78 mounted on the fixing member 76.

A receiving plate 80 is provided on the stepped surface 79 of the end surface 70 of the first cover 8, and the mounting piece 73 of the second swing vertical wall 50 comes into contact with the receiving plate 80.

Between the first and second oscillating vertical walls 49 and 50 and the vertical frame member 66, a square tubular packing 81 is interposed.

That is, the packing 81 is attached to the holding piece 82 of the vertical frame member 66.
And the main body 49a of the first and second swing vertical walls 49, 50
The packing 81 is pressed by end bent pieces 88 and 89 of 50a.

As shown in FIG. 5, a packing 85 is provided between the first swing vertical wall 49 and the second swing vertical wall 50.
A packing member 86 is interposed between the second swing vertical wall 50 and the second cover 9.

The packing 85 is a packing 37 for the primary water stoppage.
And has the same cross-sectional shape as that of the first swing vertical wall 49. Further, the packing member 86 is provided with the primary watertight packing 37.
A first member 86a having the same cross-sectional shape as that of the first member 86a, and a second member 86b having a flat plate shape. The first member 86a is attached to the second swing vertical wall 50, and the second member 86b is Attached to the top of

Thus, as shown in FIG. 3, the vertical wall member 48 (the rising wall 22, the first swinging vertical wall 49, and the second swinging vertical wall 49).
Consists of 50. 1), the first auxiliary wall piece 90 is attached to the first skeleton 1 side, and the second auxiliary wall piece 91 is formed on the second skeleton 3 side.

The first auxiliary wall pieces 90 are arranged in parallel to a plane orthogonal to the width direction of the spacing portion 7, and
A first member 90a and a second member 90b forming a flat rectangular cylinder
And And a fixing member fixed to the first skeleton 1.
The first auxiliary wall piece 90 is attached to the first skeleton 1 via 93. Note that the fixing member 93 is made of a plurality of angle members.

A mounting piece 92 is mounted on the second member 90b of the first auxiliary wall piece 90, and a third vertical portion 25 of the rising wall 22 is mounted on the tip of the mounting piece 92.

The second auxiliary wall piece 91 is provided along the width direction of the gap 7 and includes a first member 91a and a second member 91b which form a flat rectangular cylinder when combined. The mounting member protruding from the holding frame 59 of the second frame 3
It is attached to the second frame 3 via 94.

The mounting member 94 is a main body made of an angle material.
94a, an auxiliary piece 94b fixed to the end of the main body 94a,
94c, one end attachment piece 95 of the second member 91b of the second auxiliary wall piece 91 is attached to one auxiliary piece part 94b, and the second auxiliary wall piece 91 of the second auxiliary wall piece 91 is attached to the other auxiliary piece part 94c. The other end mounting piece 96 of the two members 91b is mounted.

The first and second auxiliary wall pieces 90 and 91 are connected to a water stop plate 97 and a fire protection zone 98. That is, this water stop plate 97
The fire protection zone 98 is provided along the vertical direction, that is, along the vertical direction.

As shown in FIG.
As shown in FIG. 1, a dish-shaped water receiving section 100 is provided. That is, the rising wall 101 is provided on the upper surface of the second cover 9 on the inner side in the longitudinal direction.
The rising wall 101 and the upper surface of the inner end of the second cover 9 in the longitudinal direction surrounded by the rising wall 101 form a dish-shaped water receiving portion 100.

A water drain pipe 102 is connected to the dish-shaped water receiving portion 100. That is, the drain pipe 102
The one end opening 102a opens into the water receiving part 100, and the other end opening 102b opens above the roof surface 4 of the second frame 3 as shown in FIGS. .

Therefore, if rainwater or the like accumulates in the dish-shaped water receiving portion 100, the rainwater can be drained to the roof surface 4 through the drain pipe 102. The rainwater drained to the roof surface 4 is drained to the outside by a drainage channel (not shown) provided on the roof surface 4.

The height of the rising wall 101 for forming the dish-shaped water receiving portion 100 is sufficiently smaller than the distance between the first and second covers 8 and 9.

By the way, the wall 5 erected on the second frame 3
As shown in FIG. 1, the pallet is formed of a cubic 58, a drainer 103, a blind 104, a glass plate 105, and the like.

Therefore, according to the expansion joint structure for an in-corner constructed as described above, even if the first skeleton 1 and the second skeleton 3 are displaced so as to approach and separate from each other, the first cover 8 is not required.
The horizontal extending plate portion 9a of the second cover 9 is disposed at a lower position of the second cover 9 and sufficiently follows the displacement thereof, and the first swing vertical wall 49 swings around the second frame 3 side. Then, the second swing vertical wall 50 swings about the second frame 3 side, and can sufficiently follow the displacement thereof.

That is, even if the first and second frames 1 and 3 are displaced, they are formed between the first and second frames 1 and 3 and between the wall 5 and the first frame 1. The side opening 47a of the gap 47 can be reliably covered.

The upper opening of the gap 7 is covered with a water stop plate 43 and a fire protection zone 41 along the longitudinal direction thereof, and is disposed vertically in the gap 7. The water stop plate 97 and the fire protection zone 98 are provided, and it is possible to reliably prevent rainwater from entering the gap 7 and to prevent fire spread.

[0061]

Since the present invention is configured as described above, the following effects can be obtained.

It is possible to sufficiently follow the fluctuations of the first and second frames 1 and 3, and to reliably cover the upper opening of the gap 7 and the side opening 47 a of the gap 47. be able to.

The water blocking plate 97 and the fire prevention zone 98 can reliably prevent rainwater leakage and fire spread.

Since the water blocking plate 97 and the fire protection zone 98 are attached to the first auxiliary wall piece 90 and the second auxiliary wall piece 91, they can be easily attached and the width dimension can be made relatively small, resulting in high cost. Does not.

Even if rainwater enters the inside of the vertical wall member 48, it can be received by the dish-shaped water receiving portion 100, and the rainwater and the like received by the dish-water receiving portion 100 can be drained by a drain pipe. The drain water is drained to the outside through 102, and rainwater does not accumulate inside the vertical wall member 48.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing an embodiment of the present invention.

FIG. 2 is a sectional side view.

FIG. 3 is a sectional plan view of a main part.

FIG. 4 is a cross-sectional plan view of a main part.

FIG. 5 is a sectional front view of a main part.

FIG. 6 is a plan view of a main part.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 first skeleton 2 second skeleton-corresponding surface 3 second skeleton 4 rooftop surface 5 wall surface 6 corner 7 interval 8 horizontal first cover 9 second cover 9a horizontal extending plate 22 rising wall 47 gap 47a Side opening 48 Vertical wall member 49 First swing vertical wall 50 Second swing vertical wall 51 First gap 51a Side opening 67 Second gap 67a Side opening 90 First auxiliary wall piece 91 Second Auxiliary wall piece 97 Water stop plate 98 Fire protection zone 100 Dish-shaped water receiving part 102 Drainage pipe

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho-62-126403 (JP, U) Japanese Utility Model Sho-64-49503 (JP, U) Japanese Utility Model Hei 2-39004 (JP, U) Japanese Utility Model Sho-58 89505 (JP, U) Japanese Utility Model 1-86603 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) E04B 1/62

Claims (3)

(57) [Claims] 1. A second skeleton corresponding surface 2 of a first skeleton 1, a roof surface 4 of a second skeleton 3 lower than the first skeleton 1, and a roof surface 4 of the second skeleton 3.
Wall surface 5 standing upright and perpendicular to the second skeleton corresponding surface 2
And an expansion joint structure for a corner provided at the corner 6 formed by the above, wherein the first frame 1 covers the gap 7 between the first and second frames 1 and 3 from above. Horizontal first
A cover 8 is provided, and a second cover 9 having a horizontal extending plate portion 9a disposed below the first cover 8 is provided on the second body 3 and the first cover 8 A rising wall 22 substantially parallel to the width direction of the gap 7 is erected at the inner end in the longitudinal direction, and a side opening of a first gap 51 formed between the rising wall 22 and the wall 5. A first swinging vertical wall 49 covering the portion 51a is pivotally attached to the second skeleton 3 side, and the wall surface 5, the first swinging vertical wall 49, the first cover 8, and the second cover 9 are connected to each other. Side opening 67 of the second gap 67 enclosed
The expansion joint structure for a corner, wherein a second swinging vertical wall 50 covering a is pivotally attached to the second frame 3 side. 2. A second skeleton corresponding surface 2 of the first skeleton 1, a roof surface 4 of the second skeleton 3 lower than the first skeleton 1, and the roof surface 4
Wall surface 5 standing upright and perpendicular to the second skeleton corresponding surface 2
And an expansion joint structure for a corner provided at the corner 6 formed by the above, wherein the first frame 1 covers the gap 7 between the first and second frames 1 and 3 from above. Horizontal first
A cover 8 is provided, and a second cover 9 having a horizontal extending plate portion 9a disposed below the first cover 8 is provided on the second body 3, and the second body 3 is provided with the first body 1. Side opening 47a of a gap 47 formed between the wall 5
Is covered with a vertical wall member 48, and further, on the back side of the vertical wall member 48, a first auxiliary member parallel to a plane orthogonal to the width direction of the gap 7 is provided on the first frame 1 side. A wall piece 90 is attached, and a second auxiliary wall piece 91 parallel to the width direction of the spacing section 7 is mounted on the second frame 3 side, and the first and second auxiliary wall pieces 90, 91 are attached in the vertical direction. Water stop board 97 arranged along
And an expansion joint structure for an in-corner, wherein the expansion joint structure is connected by a prevention band 98. 3. A surface 2 corresponding to the second skeleton of the first skeleton 1, a roof surface 4 of the second skeleton 3 lower than the first skeleton 1, and the roof surface 4
Wall surface 5 standing upright and perpendicular to the second skeleton corresponding surface 2
And an expansion joint structure for a corner provided at the corner 6 formed by the above, wherein the first frame 1 covers the gap 7 between the first and second frames 1 and 3 from above. Horizontal first
A cover 8 is provided, and a second cover 9 having a horizontal extending plate portion 9a disposed below the first cover 8 is provided on the second body 3, and the second body 3 is provided with the first body 1. Side opening 47a of a gap 47 formed between the wall 5
Is covered with a vertical wall member 48. Further, on the back side of the vertical wall member 48, a dish-shaped water receiving portion 100 is provided on the upper surface of the second cover 9 and the dish-shaped water receiving portion is provided. An expansion joint structure for an in-corner, wherein a drainage pipe 102 is connected to and connected to 100.