JP2001040826A - Waterproof panel unit for reentrant angle and waterproof execution method at reentrant angle of external floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof panel unit for a reentrant angle in which waterproofing works at the reentrant angle of an external floor can be conducted easily and accurately. SOLUTION: In the waterproof panel unit 50C for the reentrant angle, a heat-insulating material 1, a waster-resistant steel plate 2 with a flat section 21 and a pair of upstanding sections 22, waterproof sheets 3 upwards extended along each upstanding section 22 of the water-resistant steel plate 2, a reinforcing member 7 connecting the upstanding sections 22, a reentrant angle cover 81 integrally formed in a watertight manner so as to be positioned along the corner angle section of the reentrant angle, and a mounting member 82 stuck on the rear of the reentrant angle cover 81 are formed previously and integrally. The waterproof panel unit 50C for the reentrant angle is installed along the reentrant angle of the external floor on an execution field, and the upstanding sections 22 are fixed along retaining walls Q while the retaining walls Q are covered with the waterproof sheet 3 and the reentrant angle cover 81.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exterior floor provided outside a building, such as a balcony, a rooftop floor, an outdoor corridor, etc., which is exposed to wind and rain, particularly for use in waterproofing the interior corner. The present invention relates to a waterproof panel unit and a waterproof construction method at a corner of an external floor using the waterproof panel unit.

[0002]

2. Description of the Related Art Conventionally, in order to waterproof an external floor such as a balcony or a rooftop floor, a plate material is arranged on a structural material of the external floor to form an external floor base, and a mortar layer is formed on the external floor base. To form a drainage gradient, and lay a waterproof sheet on the mortar layer and attach it.

In this case, an outer wall of a building, a handrail wall of a balcony, or the like is usually erected around the outer floor, and an exterior material, an opening frame, and the like are attached to the outer wall of the building and the handrail wall.
Therefore, a waist wall that rises up to the lower end of the exterior material or the opening frame is formed below these building outer walls and handrail walls, and the peripheral edge of the outer floor is continuous with the waist walls. Therefore, the waterproof sheet needs to be extended upward from the peripheral edge of the outer floor and adhered to the upper edge of the waist wall in a watertight manner.

[0004]

However, in the above-mentioned conventional construction method, a specialist is required when laying a waterproof sheet on the mortar layer, and the specialist is mainly involved in the work of mounting the exterior and the like. Since it was necessary to enter the exterior construction site, inconveniences and restrictions on process management were great.

[0005] In addition, it is necessary to perform a plastering operation accurately to form a drainage gradient in the mortar layer, and it is necessary to lay a waterproof sheet flat and without gaps on the entire external floor.
The work itself took considerable effort and time.

Further, at places where the waist wall surrounding the external floor forms an entrance corner or an outgoing corner, such as at the four corners of the external floor and the projecting portion of the building outer wall, the flat waterproof sheet is extended as it is to form the waist wall. Since it is impossible to apply watertight, it is necessary to cut the waterproof sheet appropriately to create corners that can be in close contact with the in and out corners. In addition, depending on construction accuracy, sufficient watertightness may not be ensured.

The present invention has been made in view of such circumstances, and can easily perform waterproofing work on an external floor.
In particular, it is an object of the present invention to provide a corner entry waterproof panel unit capable of improving workability and water tightness at a corner of an external floor, and a waterproof construction method at a corner of an external floor using the unit.

[0008]

A waterproof panel unit for corner entry according to the present invention is a waterproof panel unit for corner entry used for waterproofing a place where two waist walls provided around an external floor form an entry corner. A panel unit, wherein a heat insulating material is formed such that two adjacent sides follow the plane shape of the corner, and a flat portion attached to the heat insulating material and a waist wall side of the two surfaces of the flat portion. A water-resistant steel plate having a pair of rising portions respectively raised from two sides, and a screw hole is formed near an upper edge of each rising portion, and each edge portion of the flat portion of the water-resistant steel plate on the waist wall side. A pair of soft resin waterproof sheets adhered from the vicinity to the lower part of each rising part and extended to above each rising part, and a pair of bent parts formed along the corner of the entering corner. It has an upright portion, and both rising portions of the water-resistant steel plate A pair of waterproof sheets having a reinforcing member fixedly attached thereto, two rising surfaces and one bottom surface formed integrally and watertightly along the corners of the corners; A soft resin-filled corner cover stuck to cover each edge portion and the reinforcing member, and a pair of upright portions bent along the corner portion of the corner, A screw hole is formed in the vicinity of the outer edge of each upright portion, and the vicinity of the corner on the corner portion side of each upright portion is attached to the vicinity of the back corner of the upright portion of the entering corner cover. And a mounting member formed.

That is, the corner entry waterproof panel unit according to the present invention is a corner cover in which a heat-resistant steel sheet and a waterproof sheet are formed integrally and in a watertight manner at discontinuous positions across the corner of the corner. Is formed so that the periphery of the corner can be covered in a water-tight manner by pasting.

According to the waterproofing method of the present invention, the waterproof panel unit for the corner is disposed on the outer floor foundation at the corner, and the heat insulating material is fixed on the exterior floor via an adhesive. At the same time, after each rising portion of the water-resistant steel plate is screw-fixed to the two waist walls forming the corner, the mounting member is screw-fixed to the two waist walls, and then the waterproof sheet and the corner cover are raised. By extending the surface along the waist wall, it is characterized in that the periphery of the corner at the entering corner is covered in a watertight manner.

[0011] This makes it possible to perform the waterproofing work at the corner of the external floor without the troublesome work of processing the edge of the water-resistant steel sheet or the waterproof sheet on the inside corner to the shape of the corner at the site. It can be easily performed in the same manner as the general part. In this way, the workability of the waterproofing work is remarkably improved, and stable workability is ensured.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

First, a description will be given of a waterproof structure in a general portion other than where a waist wall surrounding an external floor forms an entrance corner or an exit corner and a construction method thereof. A waterproof structure in a general portion of an external floor is shown in FIG. As described above, the heat insulating material 1 stuck on the external floor base material P made of the ALC floorboard and the like, the water-resistant steel plate 2 stuck on the surface of the heat insulating material 1, and the water-resistant steel plate 2 stuck on the water-resistant steel plate 2 Tarpaulin 3
And a drainer 4 attached along the upper edge of the waterproof sheet 3.

The heat insulating material 1 is a plate-like body made of expanded polystyrene resin or the like, and is adhered to the external floor substrate P via an adhesive.

The water-resistant steel plate 2 is a steel thin plate having a water-resistant coating made of vinyl chloride or the like formed on the surface or on both sides.
A flat portion 21, which is overlaid on the heat insulating material 1, and a flat portion 2
1 is provided with a rising portion 22 formed by bending one edge portion upward, and the rising portion 22 is applied along the waist wall Q and is screwed to the waist wall Q.

The waterproof sheet 3 is made of a resin such as soft vinyl chloride, and is adhered along the rising portion 22 from near the edge of the flat portion 21 of the waterproof steel plate 2 on the waist wall Q side, and further extends upward. To cover the upper edge of the waist wall Q.

Further, a long draining member 4 is attached to the upper edge of the waist wall Q along the lower end of the exterior material, the opening frame R, and the like. Screws are stopped. Thus, the exterior material, the opening frame R and the lumbar wall Q
Water is stopped at the boundary with

As described above, since most of the waterproof layer on the surface of the outer floor is formed of the water-resistant steel plate 2, the work involved in attaching the waterproof sheet 3 can be greatly reduced.

With respect to this waterproof structure, a heat insulating material 1, a water resistant steel plate 2 and a waterproof sheet 3 are processed and pasted into a predetermined shape in a factory or the like to form a waterproof panel, and the waterproof panel is carried into a construction site. By means of laying, work on the construction site can be made more efficient. 2 and 3 show an embodiment of a waterproof panel.

As the waterproof panel, a waist wall Q surrounding the outer floor is used.
Floor panel 5A for general part arranged along the linear part of
(FIG. 2) and a gutter panel 5B (FIG. 3) arranged below the outer floor for collecting and draining rainwater flowing down on the surface of the floor panel 5A for general use.

The floor panel 5A for a general part is formed by attaching a flat portion 21 of a water-resistant steel plate 2 to a heat insulating material 1 having a rectangular shape in a plan view.
A rising portion 22 is formed on one side of the rising portion 22. Near the upper edge of the rising portion 22, a screw hole 221 for screwing the rising portion 22 to the waist wall Q is formed.
Are provided at intervals in the horizontal direction. Further, the heat insulating material 1 is formed so that its thickness becomes gradually thinner from the rising portion 22 side to the opposite side, thereby giving a drainage gradient to the surface of the waterproof steel plate 2. The waterproof sheet 3 is attached to the flat portion 21 of the waterproof steel plate 2 from the vicinity of the edge on the side of the rising portion 22 to the rising portion 22, and the waterproof sheet 3 extends further upward than the rising portion 22. However, this waterproof sheet 3
It is not adhered to the vicinity of the screw hole 221 near the upper edge of the rising portion 22, and when the extending portion of the waterproof sheet 3 is turned downward, the screw hole 221 provided in the rising portion 22 is exposed, and the screw is stopped as it is. The work can be done.

The gutter panel 5B is formed to be thinner in plane shape than the floor panel 5A for a general part, and a drain groove 23 formed by bending the flat portion 21 of the water-resistant steel plate 2 is provided along the longitudinal direction. Have been. The heat insulating material 1 is adhered to the lower surfaces of the flat part 21 and the drain groove 23. A rising portion 22 is formed at one of the long sides of the water-resistant steel plate 2, and a plurality of screw holes 221 are provided in the vicinity of the upper edge of the rising portion 22 at intervals in the horizontal direction. The waterproof sheet 3 is attached with its lower edge bonded to the lower part of the rising part 22, and extends to above the rising part 22. At the other long side edge of the water-resistant steel plate 2, a joining portion 24 having a substantially L-shaped cross section including a hanging piece 241 and a horizontal piece 242 is formed. A plurality of screw holes 243 for screwing the horizontal piece portion 242 of the joining portion 24 to the external floor base P are provided at intervals.

Referring to FIG. 4, a description will be given of a construction method when waterproofing the general portion of the external floor using the general portion floor panel 5A and the gutter panel 5B.

First, the gutter panel 5B is arranged so that the drain groove 23 is dropped into a concave portion T formed between the external floor base P and the groove receiving member S, and the rising portion 22 is formed on the waist wall Q.
Next, the horizontal piece 242 of the joint 24 is screwed to the external floor base P, respectively. The edge of the gutter panel 5B is stopped by an end member (not shown).

Next, the general-use floor panel 5A is placed on the external floor base P such that the horizontal piece 242 of the gutter panel 5B is pressed by the underwater edge thereof. While being fixed on the floor base P, the rising portion 22 is screwed to the waist wall Q.

When the floor panel 5A for general use and the gutter panel 5B are arranged at predetermined positions in this way, the waterproof sheet 3 attached to each is raised along the waist wall Q, and adhesives, nails, etc. The upper edge part is temporarily fixed to the waist wall Q by using.
Thereby, the head of the screw fixing the rising portion 22 to the waist wall Q is also covered. The height of the waist wall Q varies depending on the type of building, the specifications of the outer wall, and the like. However, if the extension of the waterproof sheet 3 is made slightly longer in advance, the waterproof sheet 3 can be appropriately adjusted to the height of the waist wall Q. By cutting, the waist wall Q
Up to the upper edge.

A joint U having a slight gap between each adjacent general part floor panel 5A and gutter panel 5B.
Are formed, these joints U are sealed using an adhesive tape 61 and a patch belt 62.

The adhesive tape 61 is a water-resistant synthetic paper or cloth tape represented by a kraft tape or the like. A kraft tape having a width of about twice the width of the joint U is stuck on the joint U so as to straddle the adjacent general part floor panel 5A and gutter panel 5B.

The patch belt 62 is a belt-shaped member made of a resin such as soft vinyl chloride, and has a width equal to that of the adhesive tape 61.
It is formed wider than before. Patch belt 62
The back surface has adhesive surfaces formed on both side edges except for a central portion corresponding to the width of the adhesive tape 61. The non-adhesive surface of the central portion of the patch belt 62 is
The adhesive surfaces of both side edges are adhered to the surfaces of the floor panel 5A for general use and the gutter panel 5B adjacent to each other.

The adhesive tape 61 and the patch belt 62
It is adhered so as to continue from the surface of the water-resistant steel plate 2 to the upper part of the waterproof sheet 3 temporarily fixed along the waist wall Q. Thus, the joints U between the general part floor panels 5A and the gutter panels 5B are sealed in a watertight manner, and even when the general part floor panels 5A and the gutter panels 5B move horizontally with respect to each other.
The displacement of the space between the joints U can be absorbed.

From the surface of the external floor to the upper edge of the waist wall Q,
Once the waterproof steel sheet 2, the waterproof sheet 3, and the patch belt 62 are covered in a water-tight manner, the draining member 4 shown in FIG. 1 is attached along the upper edge of the waist wall Q, and the upper edge of the waterproof sheet 3 is removed. Fix it to the waist wall Q by pressing it. Finally, a sealing 41 is provided between the upper edge of the draining member 4 and the lower end of the exterior material or the opening frame R. Thus, the boundary between the exterior material or the opening frame R and the waist wall Q is also stopped.

As described above, the waterproof panel (general part floor panel 5A, gutter panel 5B) formed by processing and bonding the heat insulating material 1, the water-resistant steel plate 2 and the waterproof sheet 3 into a predetermined shape in advance is provided on the external floor. By mounting and fixing, the troublesome plastering work and the attaching work of the waterproof sheet 3 at the construction site become unnecessary, and the waterproofing work of the external floor can be performed efficiently and accurately. Since the waterproof sheet 3 is made of a soft resin that can be easily bent, even if the waterproof sheet 3 is attached to the waterproof steel sheet 2 in advance, there is little problem in terms of transportation and storage.

The present invention is for efficiently and accurately constructing a waterproof structure which is continuous with the general portion at a location where a waist wall Q surrounding an external floor forms a corner. Hereinafter, the embodiment will be described with reference to FIGS.

The waterproof structure at the corners of the external floor includes a floor panel for corners 5C (FIG. 7), which is a waterproof panel prepared according to the shape of the corners, and a corner portion of the floor panel for corners 5C. Is formed using a corner entry waterproof panel unit 50C (FIG. 8) composed of a reinforcement member 7 for reinforcing the base member, and a corner entry waterproof accessory 8 which is attached to the reinforcement member 7 in an overlapping manner. .

The floor panel 5C for the corner is, similarly to the floor panel 5A for the general part, a heat insulating material 1, a water-resistant steel plate 2 bonded to the surface of the heat insulating material 1, and a water-resistant steel plate 2 bonded to the surface of the water-resistant steel plate 2. And is fixed on the external floor base P with one corner thereof in contact with the two waist walls Q forming the corners. The materials of the heat insulating material 1, the water-resistant steel plate 2, and the waterproof sheet 3 are the same as described above.

The heat insulating material 1 is formed so that two sides adjacent to each other across one corner conform to the plane shape of the corner, and is directed diagonally from the corner, or from one side of the corner to the opposite side. , A suitable drainage gradient is provided. This insulation 1
Are bonded on the external floor base P via an adhesive.

The water-resistant steel plate 2 includes a flat portion 21 stuck on the heat insulating material 1 and a pair of rising portions 22 respectively raised upward from two sides of the flat portion 21 on the waist wall Q side. I have. Since each of the rising portions 22 is formed by bending a flat water-resistant steel plate 2 having a corner on the corner side of the corner, the portion facing the corner of the corner is not formed. It is continuous. A screw hole 2 is provided near the upper edge of each rising portion 22.
21 are provided at intervals in the horizontal direction, and each of the rising portions 22 is
It is screwed to.

The waterproof sheet 3 is made of a flat portion 21 of the waterproof steel plate 2.
From the vicinity of the edge on the side of the waist wall Q along each rising portion 22, and extends above the upper edge of each rising portion 22. Therefore, also in each of the waterproof sheets 3, the portion facing the corner of the entering corner is discontinuous. Each of the waterproof sheets 3 has a lower edge portion formed in advance of the flat portion 2 of the waterproof steel plate 2.
1 and is bonded only to the lower part of each rising portion 22.
By turning over the upper part, the rising part 22 can be screwed to the waist wall Q. Each tarpaulin 3
It is cut in accordance with the height of the waist wall Q and is extended upward to cover the rising portion 22 and the head of the screw fixing the same to the waist wall Q.

The reinforcing member 7 is a member formed by bending a resin-coated steel plate similar to the water-resistant steel plate 2, and has a pair of upright portions 71 which are bent along the corners of the entering corners and are continuous. And a horizontal portion 72 projecting horizontally from the lower edge of each upright portion 71 toward the inside of the entry corner. The edges on the corner side of each horizontal portion 72 are cut obliquely with respect to the lower edge of each upright portion 71 so as not to overlap each other. The reinforcing member 7 is a flat portion 2 of the waterproof steel plate 2 of the corner panel 5C.
The first and both rising portions 22 are welded together. Thereby, the right and left rising portions 22 of the water-resistant steel plate 2 formed discontinuously with each other are structurally connected along the corners of the entering corners, and the upright state of each rising portion 22 is stably maintained, and In addition, it is possible to prevent the water-resistant steel plate 2 from being deformed or damaged when stress is concentrated around the corner.

It is sufficient that the reinforcing member 7 has at least a pair of upright portions 71 that can connect the right and left rising portions 22. The presence or absence of the horizontal portion 72 and the shape thereof are not particularly limited.

The cornering waterproof part 8 is made of a resin-coated steel plate attached to the back of the cornering cover 81 integrally and three-dimensionally formed by injection molding a resin such as soft vinyl chloride. And a mounting member 82 made of stainless steel.

The entering corner cover 81 includes two rising surfaces 811 formed along the corners of the entering corners, and a bottom surface 812 integrally continuous with the lower edges thereof. Face 81
1 and the bottom surface portion 812 are formed in a watertight manner without any gap therebetween. The upright surface portion 811 and the bottom surface portion 812 cover the reinforcing member 7, and are formed in such a size that the width of both outer edges extends over the right and left waterproof sheets 3 of the floor panel for corners 5 </ b> C. . In addition, the height of the upright portion 811 is formed to be substantially the same as the extension height of the waterproof sheet 3 of the floor panel for corners 5C.

The mounting member 82 has a pair of upright portions 821 which are bent and continuous along the corners of the entering corners, and a screw hole 822 is formed near the outer edge of each upright portion 821. Is provided. Each of the mounting members 82 is
The vicinity of the edge on the side of the corner portion 1 is the rising surface portion 8 of the corner cover 81.
11 is attached in advance to the vicinity of the corner on the back surface of the back cover 11 so that the mounting member 82 can be screwed to the waist wall Q by turning both edges of the rising surface 811 of the corner cover 81 forward. I have. By screwing the mounting member 82 to two waist walls Q sandwiching the corner of the corner, the corner cover 81 is attracted to the corner of the waist wall Q. And the corner cover 81
Is extended, the mounting member 82 is covered behind the corner cover 81. Both outer edges of the upright portion 811 are put on the edges of the entrance corners of the respective waterproof sheets 3 extended on both sides of the corners, respectively, and the respective waterproof sheets 3 and the water-resistant steel plate are put through an adhesive. 2 is adhered.

As described above, the heat-resistant steel sheet 2 and the waterproof sheet 3 adhered to the surface thereof are integrally and watertightly formed at the discontinuity at the corners of the corners.
By adhering 1, the waterproof surface without a gap is integrally formed, and the periphery of the corner is covered in a watertight manner. The corner cover 81 is screwed to the lumbar wall Q via an attachment member 82 attached to the rear surface thereof, and is adhered to the waterproof sheet 3 via an adhesive applied to an edge of the rear surface. As a result, it is securely held along the corner of the inside corner, and its attachment is easy. Further, the attachment state of each member around the corner portion is strengthened by the reinforcing member 7 connecting the both rising portions 22 of the waterproof steel plate 2 and the attachment member 82 attached to the back surface of the corner cover 81.

Waterproof panel unit for corners 50C of the present invention
Is a member in which a corner panel 5C, a reinforcing member 7, and a corner waterproof part 8 are integrally formed in a factory or the like in advance. The reinforcing member 7 is welded over the right and left rising portions 22 of the water-resistant steel plate 2. Further, the cornering waterproof accessory 8 is attached to the waterproof steel plate 2 via an adhesive applied to the back surface of the cornering cover 81.
The flat portion 21 and the edge of the waterproof sheet 3 on the entering corner side are overlapped and adhered.

Then, the mounting / adhering work of each member at the construction site is reduced by the construction method in which the integrally formed waterproof panel unit for corners 50C, which is formed in advance, is carried into the site and installed at the corner of the external floor. Thus, workability can be improved. Even in this case, the waterproof sheet 3 or the corner cover 8
Since 1 is made of a soft resin, these can be appropriately folded. Therefore, even if the attachment member 82 is attached to the back surface of the corner cover 81 having a three-dimensional shape, there is little trouble in terms of transportation and storage.

The waterproof construction method using the corner entry waterproof panel unit 50C is as follows.

First, the corner waterproof panel unit 50C is placed on the external floor base P along the corner. The heat insulating material 1 is adhered to the external floor substrate P via an adhesive, and the waterproof sheet 3 attached to the surface of the water-resistant steel plate 2 is turned to the front, so that the two waist walls Q forming the corners are waterproof. Each rising portion 22 of the steel plate 2 is screwed.

Next, the cornering waterproof part 8 is applied to the corner of the corner, and both edges of the upright surface 811 of the corner cover 81 are turned to the front, and the mounting member 82 is screwed to the waist wall Q. Stop it.

Then, the waterproof sheet 3 and the corner cover 81
Are raised along the waist wall Q, and the upper edges thereof are cut to align with the height of the waist wall Q, and then temporarily fixed to each waist wall Q using an adhesive, a nail, or the like. .

The waterproof panel unit 50C for the corner and the floor panel 5A and the gutter panel 5B for the general part arranged in the general part.
The joint U is sealed by using the adhesive tape 61 and the patch belt 62 as described above.

Finally, the draining member 4 is attached along the upper edge of the waist wall Q and fixed so as to be continuous with the general portion.
Sealing 41 is applied. At this time, an in-corner drainer (not shown) bent in accordance with the shape may be separately prepared and attached to the in-corner corner.

[0053]

As described above, a corner cover integrally and watertightly formed at a discontinuous portion of a heat-resistant steel sheet and a waterproof sheet at a corner of the corner is previously bonded. By using the waterproof panel unit for the water-resistant steel sheet or waterproof sheet, it is not necessary to perform complicated work such as processing the on-site edge of the inside corner to the shape of the inside corner, and it is possible to use The waterproofing work can be easily performed in the same manner as the general part. In this way, the workability of the waterproofing work is remarkably improved, and stable workability is ensured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a waterproof structure in a general portion of an external floor.

FIG. 2 is a perspective view showing a configuration of a floor panel for a general part used for a waterproof structure of the general part.

FIG. 3 is a perspective view showing a configuration of a gutter panel used for a waterproof structure of the general part.

FIG. 4 is a perspective view showing a construction state when performing waterproofing work on the general part using the floor panel and the gutter panel for the general part.

FIG. 5 is an exploded perspective view showing an embodiment of a waterproof structure at a corner of an external floor.

FIG. 6 is a longitudinal sectional view of the waterproof structure of FIG.

FIG. 7 is a perspective view showing a configuration of a floor panel for a corner used in the waterproof structure of FIG. 5;

FIG. 8 is a perspective view showing an embodiment of a corner entry waterproof panel unit of the present invention.

[Explanation of symbols]

 P External floor base Q Waist wall 1 Heat insulating material 2 Water resistant steel plate 21 Flat part 22 Standing part 221 Screw hole in rising part 3 Waterproof sheet 50C Waterproof panel unit for corner entry 7 Reinforcement member 71 Upright part of reinforcement member 81 Corner cover 811 erect Surface part 812 Bottom part 82 Mounting member 821 Upright part of mounting member 822 Screw hole of mounting member

Claims (2)

[Claims] 1. A corner entry waterproof panel unit used for waterproofing a place where two waist walls provided around an outer floor form an entry corner, wherein two adjacent sides are planes of the entry corner. A heat insulating material formed so as to conform to the shape, and a pair of rising portions respectively raised from two sides of the flat portion adhered on the heat insulating material and the two flat sides of the waist wall. A water-resistant steel plate having a screw hole formed in the vicinity of the upper edge of each rising portion; and a portion of the water-resistant steel plate from the vicinity of each edge of the flat portion on the waist wall side to the lower portion of each rising portion. A pair of soft resin waterproof sheets extending to above the portion, and a pair of upright portions bent along the corners of the inset corners, and fixed over both rising portions of the water-resistant steel plate. Along the corner of the corner It has two raised surfaces and one bottom surface integrally and watertightly formed as described above, and is adhered so as to cover each edge of the pair of waterproof sheets on the inner corner side and the reinforcing member. And a pair of uprights bent along the corners of the corners, and screw holes are respectively formed near the outer edges of the uprights. And an attachment member in which the vicinity of the edge on the corner portion side of each upright portion is attached near the corner portion on the back surface of the upright portion of the corner cover. Waterproof panel unit. 2. The corner entry waterproof panel unit according to claim 1, wherein the corner entry waterproof panel unit is arranged on the outside floor foundation at the corner, and the heat insulating material is fixed on the exterior floor foundation via an adhesive, and the interior corner is formed. After fixing each rising part of the water-resistant steel plate to the waist wall of the surface with screws, the fixing member is screw-fixed to the waist wall of the two surfaces, and then the erect portions of the waterproof sheet and the corner cover are extended along the waist wall. A method for waterproofing at a corner of an external floor, wherein the corner around the corner is water-tightly covered.