JP5242012B2 - Drain device - Google Patents

Description

The present invention relates to a vertical pulling device and a horizontal pulling drain device installed on a horizontal portion such as a rooftop floor surface.

There is known a deck plate base heat insulating roof construction method in which a roof is formed by laying a heat insulating plate on a deck plate and further waterproofing the heat insulating plate.

Since the roof formed by this construction method is a substantially flat land roof surrounded by parapets, a roof drain for rainwater drainage is installed on the roof.

Conventionally, such a roof drain is shown in FIG.
The drain main body 1 includes a circular flange portion 2 and a drain pipe portion 4 coupled downward so as to surround a drain hole 3 opened at the center of the flange portion 2. 1 is fixed on the deck plate 6 by a rectangular fixing bracket 5 extending outward from the rear surface of the edge of the flange portion 2. Note that the fixing bracket 5 is fixed to the flange portion 2 by a fixture 7.

On the upper surface of the flange portion 2, a waterproof layer presser 10 that holds the edge portion of the waterproof sheet layer 9 formed on the deck plate 6 via the heat insulating layer 8 is screwed to the flange portion 2. A drain cover 11 having a large number of water passage gaps is disposed on the layer presser 10, and a collar portion 12 at the lower end thereof is screwed to the waterproof layer presser 10.

In addition, the following documents exist in relation to the above.
JP 2004-197512 A JP2003-321907 JP 2003-113664 A JP2002-276097 JP-A-11-81580 JP-A-11-172863

However, in the above prior art shown in FIG. 8, the flange portion 2 of the drain main body 1 is placed on the fixing bracket 5, and a step is inevitably generated, so that water tends to accumulate in the step portion. In addition to poor drainage, the waterproof layer is likely to deteriorate. Such inconvenience is eliminated in the case where the outer heat insulating layer 8 is formed as shown in FIG. 8, but in this case, the end of the outer heat insulating layer 8 abuts on the outer peripheral edge of the flange portion 2 or extends to the vicinity thereof. I have to take the structure to make it happen. However, with such a configuration, the end of the waterproof sheet layer 9 will fit directly into the flange portion 2 without being in close contact with the underlying deck plate 6, maintaining appropriate water tightness and making it difficult to perform efficient construction. Become.
The invention of the present application maintains the waterproof layer surface smoothly at the drain periphery and realizes smooth drainage by allowing the waterproof layer to be in close contact with the base as much as necessary, maintaining and strengthening waterproof performance around the drain and construction It is intended to improve the performance.

The present invention is a drain device mounting structure constructed in an opening formed in a roof base comprising an outer heat insulating layer and a waterproof layer affixed to the surface of the outer heat insulating layer, and the drain device includes a pipe portion. The drain body has a drain cover that is attached to the upper part of the drain body with a waterproof layer presser provided continuously to the outer periphery of the lower end, and is connected to the drain pipe in the opening of the roof base. The drain body in which the flange portion is formed on the outer periphery of the opening end of the pipe portion is joined to the roof base so that the end edge is separated from the opening periphery by a predetermined distance from the periphery of the opening of the roof base. and a central opening which is formed in the center of the pan is formed to protrude from the lower end of the formed from the periphery of the hole corresponding to the opening portion having a circular cross section downwardly extending portion of the roof bed to the hole center of the saucer While being supported at a predetermined position in the opening in the roof bed by a disc-shaped support member, the continuous surface and the surface of the saucer of the flange portion is fitted the flange portion in the hole formed in the pan The end of the outer heat insulating layer that forms a surface and faces the opening of the roof base is fitted to the edge of the tray so as to surround the outer periphery of the tray, and the end of the waterproof layer is the opening of the pipe portion. It is stretched to the outer peripheral edge and is sandwiched and fixed between the flange portion and the waterproof layer presser, and the waterproof layer is fixed to the entire surface of the tray that is bonded and fixed to the roof base around the flange portion, so that it is stably attached to the roof base. to be secured, further drain system mounting structure forming a heat insulating layer surface by spraying in advance the heat insulating material in the the pan back side, tries to solve the above problems by providing Is shall.

Also, in the drain device mounting structure of paragraph 0007, the tray is formed in a square shape, the extension dimension from the flange end, that is, the distance between the flange outer periphery and the tray outer periphery is 100 mm, and the waterproof layer is a flange. As a result of being fixedly bonded to the saucer over the entire circumference of 100 mm around the part, it may be configured to be firmly fixed to the roof base via the saucer over the circumference of the flange part around 100 mm. .

Furthermore, in the drain device mounting structure according to any one of paragraphs 0007 and 0008, a heat insulating material is blown to the outer surface of the tray, the support member, and the tube body to form a heat insulating layer, and the tray is surrounded by the outer periphery of the tray. A drain device mounting structure characterized in that a heat insulating layer continuous with an end portion of the outer heat insulating layer stored in conformity with an edge is formed up to a support member.

The invention of the present application is also provided on a wall surface disposed at a corner portion where an outer heat insulating layer, a roof base provided with a waterproof layer attached to the surface of the outer heat insulating layer, and a wall surface provided with the waterproof layer and formed in a vertical direction intersect. A drain device mounting structure for horizontally draining a drainage pipe to be formed, wherein the drain device has a drain body having a flange portion on an outer periphery of an opening end of a pipe portion connected to the drainage pipe, and a drain body The flange portion is formed in a substantially L-shaped cross section by a vertical edge portion formed on the outer periphery of the open end of the tube portion and a horizontal edge portion formed integrally therewith, and with the attachment device constituted by a horizontal pan portion joined affixed to the vertical pan portion and the roof under the ground, which is fixed to the wall, each of said vertical edges and horizontal edges of the flange portion of the drain body Ri with said horizontal pan portion and the vertical pan portion causes fitted as a surface of the flange portion and the saucer portion continuous to the device, the ends of the external insulation layer extending in the drain pipe direction roof under the ground the The position in contact with the outer periphery of the horizontal saucer is the terminal position, and this end position fits the edge of the horizontal saucer so that it surrounds the outer periphery of the horizontal saucer, while each of the waterproof layer on the roof base and the wall surface. The end portion is sandwiched and fixed by a waterproof layer presser , and the waterproof layer is fixed to the entire surface of the horizontal tray that is bonded and fixed to the roof base around the flange portion of the roof base, so that it is stably fixed to the roof base. Furthermore, a drain device mounting structure having a structure in which a heat insulating material is sprayed in advance on the back surface of the horizontal tray to form a heat insulating layer surface is provided to solve the above conventional problems. It is those intoxicated to.

In the drain device mounting structure according to paragraph 0010, the horizontal tray portion is formed in a square shape, and the extension dimension of the flange portion from the horizontal edge end, that is, the distance between the flange portion outer peripheral end and the tray outer peripheral end is 100 mm. As a result, the waterproof layer is bonded and fixed to the saucer over the entire circumference of the flange portion around 100 mm . As a result, the waterproof layer is firmly fixed to the roof base through the saucer over the circumference of the flange portion around 100 mm. It may become the composition which is done.

Furthermore, in the drain device mounting structure according to paragraph 0010 or 0011 above, a heat insulating material is sprayed on the back surface of the continuous flat surface formed by the horizontal edge portion of the flange portion so as to surround the outer periphery of the horizontal tray portion. In some cases, a heat insulating layer continuous with the end portion of the outer heat insulating layer stored in conformity with the edge of the tray portion is formed up to the continuous flat surface .

Due to the above-described configuration and action, the present invention has the following effects.
1. Since the flow path from the waterproof layer to the drain hole is formed on a flat surface, there is no stagnation of water around the drain, smooth drainage is performed, and the fear of deterioration of the waterproof layer can be eliminated.
2. In forming the outer heat insulating layer on the drain attachment surface, the waterproof layer can be fixed to the attachment surface (base) with a sufficient area around the drain, so that the water tightness around the drain can be ensured.
3. Since the start end of the heat insulating layer around the drain can be set at a sufficient distance from the drain body, workability and construction accuracy are also improved.

The present invention can be applied to both so-called vertical pulling and horizontal pulling in a drain device.
The vertical drain device is attached to a drain body having a flange portion on the outer periphery of an opening end of a pipe portion connected to a drain pipe formed in communication with a base (floor surface) opening portion and an upper portion of the drain body. A drain cover and a drain body attachment device are provided, and the attachment device is constituted by a tray that contacts and surrounds the flange portion end edge of the drain body to form a continuous surface with the surface of the flange portion. The tray is formed of a substantially rectangular metal plate having a through-hole having the same shape as the outer periphery of the flange portion at the center, and the flange portion is fitted into the through-hole.
And the surface of a flange part and the surface of a saucer are comprised so that it may become a continuous flat surface. The flange portion and the tray may be fixed by screws, but if the flange portion end edge and the through-hole end edge of the tray that contacts and surrounds the flange portion are welded, the watertightness of the both becomes firm.
Further, a support member is provided on the back surface of the tray that is fixed to the base (floor surface), and the drain main body is attached and fixed to the support member through a screw hole formed on the back surface of the flange portion.

Further, a waterproof layer holder is continuously provided on the outer periphery of the lower end of the drain cover, and the waterproof layer end is sandwiched and fixed between the waterproof layer holder and the flange portion of the drain body. And when forming a heat insulation layer in a foundation | substrate (floor surface), the complicated operation | work which forms a heat insulation layer in a drain main body at a construction site can be avoided by spraying a heat insulating material beforehand on a saucer back surface.

In addition, a so-called horizontal pull type drain device that is disposed at a corner portion where a horizontal ground plane and a vertical wall surface intersect, and drains the drain pipe formed on the wall surface in the horizontal direction, A drain main body having a flange portion on the outer periphery of the open end of the pipe portion connected to the drain pipe, and a drain body attaching device, wherein the flange portion is a vertical edge formed on the outer periphery of the open end of the pipe portion And a horizontal edge formed integrally therewith, the cross section is substantially L-shaped, and the attachment device of the drain body is composed of a vertical saucer fixed to the wall surface and a horizontal saucer fixed to the ground surface. The The vertical saucer portion and the horizontal saucer portion fixed to the base surface are formed of a metal plate, and the vertical edge portion of the flange portion is fitted through so that the respective vertical edges of the flange portion are continuous. The horizontal edge portion of the flange portion is fitted through the saucer portion so that the respective surfaces thereof are continuous.

The mounting device fixed to the drain device construction site is screwed through a screw hole formed on the back surface of the flange portion, or the flange portion edge and the mounting device edge that contacts and surrounds the flange portion edge. You may make it weld-connect between. Further, a waterproof layer press is interposed between the outer peripheral edge of the lower end of the drain cover attached to the flange portion and the flange portion, and between the waterproof layer press and the flange portion of the drain body by the screw. The end of the waterproof layer is clamped and fixed. When a heat insulating layer is formed on the base (floor surface), a heat insulating material is sprayed in advance on the back surface of the mounting device (each tray portion) to insulate the drain body at the construction site. Avoid the cumbersome task of forming layers.

An embodiment of the present invention will be described below. FIG. 1 is a partially cutaway longitudinal sectional view showing a longitudinal drain device and a drainage structure according to one embodiment of the present invention.
In the figure, D is a drain device comprising a drain body 21, a drain cover 22 attached to the upper portion of the drain body, and a drain body mounting device 23. The drain main body 21 has a flange portion 25 on the outer periphery of the open end K of a pipe portion 24 connected to a drain pipe (not shown), and is formed of a steel material.

The attachment device 23 includes a tray 26 that abuts on and surrounds the edge of the flange portion 25 of the drain body 21 to form a continuous flat surface with the surface of the flange portion 25. The tray 26 fixed to the deck plate P as a base is formed of a substantially rectangular metal plate having a through hole having the same shape as the outer periphery of the flange portion 25 at the center as shown in FIG. The flange portion 25 is adapted to be fitted into this through hole.

A support member 27 is provided on the back surface of the tray 26, and the drain body 21 is attached to the support member 27 by screwing through a screw hole formed on the back surface of the flange portion 25. As described above, the flange portion 25 is attached. And the surface of the tray 26 are fixed so as to form a continuous flat surface. The drain main body 21 and the tray 26 may be fixed by welding between the end edge of the flange portion 25 and the through hole of the tray 26 that contacts and surrounds the edge instead of screw fixing. In the case of this welding fixation, it is possible to expect a reduction in work man-hours, improvement in continuous flatness, enhancement of water tightness, and the like compared with screw fixation. In this embodiment, the extension dimension from the end of the flange portion 25 of the tray 26 is formed to be about 100 mm.

Further, in FIG. 1, 28 is a waterproof layer retainer continuously provided on the outer periphery of the lower end of the drain cover 22, and an end portion of a later-described waterproof layer 30 is provided between the waterproof layer retainer 28 and the flange portion 24 of the drain body 21. It is designed to pinch and fix.

FIG. 1 shows an example in which the drain device D is constructed on the deck plate P having the outer heat insulating layer as described above, and the outer heat insulating layer 31 is laid on the deck plate P. The waterproof layer 30 is covering. The end portion of the outer heat insulating layer 30 is formed so as to coincide with the end edge of the tray 26. Therefore, the waterproof layer 30 is formed between the end edge of the flange portion 25 and the outer end edge of the tray 26 (the distance is as described above). Is about 100 mm) to the surface of the tray 26. Thereby, waterproof construction around the drain device is facilitated, construction accuracy is improved, and waterproof performance around the drain device can be ensured.

FIG. 2 is a perspective view showing a related configuration of the drain main body 21 and the attachment device 23. The flange portion 25 of the drain body 21 is provided at the center portion of the tray 26 and is fitted into a through-hole portion having the same diameter as the outer edge of the flange portion 25 to form a surface in which the surfaces of the flange portion 25 and the tray 26 are continuous. N, N, and N are bolts for fixing the flange portion 25 to a support member 27 described later.

FIG. 3 is a perspective view showing the back side of FIG. In the figure, reference numeral 27 denotes the above-mentioned support member. This support member 27 forms a cylindrical body as shown in the figure, the upper opening is connected and fixed to the opening of the tray 26, and the tube portion of the drain main body 21 is attached to the bottom. 24 is fitted, and the flange portion 25 is configured to be substantially housed in the support member 27. In addition, a heat insulating material may be sprayed in advance on the outer surfaces of the tray 26, the support member 27, and the tube body 24. As a result, the troublesomeness required when forming a heat insulating layer around the drain device at the construction site. Work becomes unnecessary.
That is, FIG. 4 is a partial cross-sectional side view of the drain main body 21 in which such a heat insulating layer is formed and the attachment device 23 for housing the drain main body 21. In the figure, H1 is a heat insulating layer formed of a known heat insulating material on the entire back surface. Conventionally, insulation work was sprayed from the bottom using a spraying device at the construction site, but by forming the heat insulating layer H1 in advance in this way, in thickness, fixability etc. A high-quality heat insulating layer can be obtained, and work using a spraying device is not required in a narrow construction site, so that construction efficiency can be improved and construction cost can be reduced.

FIG. 5 is a partially cutaway longitudinal sectional view showing a so-called horizontal pulling type drain device according to the present invention and a drainage structure using the drain device.
D1 is a so-called horizontal pulling type drain device, which is disposed in a corner portion where a horizontal ground plane (deck plate P) and a vertical wall surface intersect and is formed in a horizontal direction on a drain pipe formed on the wall surface. It is for draining. The drain device D1 includes a drain main body 31, a drain cover 32 attached to the drain main body 31, and an attachment device 33 for the drain main body 31. The drain main body 31 has a flange portion 35 on the outer periphery of the open end K of the pipe portion 34 connected to the drain pipe (not shown).

The flange portion 35 is formed in a substantially L-shaped cross section by a vertical edge portion 35a formed on the outer periphery of the open end K of the tube portion 34 and a horizontal edge portion 35b formed integrally therewith.
The attachment device 33 includes a vertical tray portion 33a fixed to the wall surface and a horizontal tray portion 33b fixed to the deck plate P which is a base surface. The vertical tray portion 33a and the horizontal tray portion 33b fixed to the base surface are formed of a metal plate. Reference numeral 33c denotes a support member welded and fixed to the back surfaces of the vertical tray portion 33a and the horizontal tray portion 33b.

And the horizontal edge part 35b of the flange part 35 is penetrated by the horizontal saucer part 33b so that each surface may continue. In this embodiment, the horizontal tray portion 33b is formed to extend approximately 100 mm from the horizontal edge portion 35b.

The attachment device 33 fixed to the lower ground (deck plate P) is screwed through a screw hole formed on the back surface of the flange portion 35. A waterproof layer retainer 36 is interposed between the lower peripheral edge 32a of the drain cover 32 attached to the flange portion 35 and the horizontal edge 35b of the flange portion 35. The waterproof layer retainer 36 is provided by the screw. The end of the waterproof layer 37 is sandwiched between the flange portion 35 of the drain main body 31 and fixed.

FIG. 5 shows an example in which the drain device D1 is constructed on the deck plate P on which the outer heat insulating layer 38 is formed, as shown in the figure. The outer heat insulating layer 38 is laid on the deck plate P, and this outer heat insulating layer 38 is provided. The layer 38 is covered with a waterproof layer 37. The end portion of the outer heat insulating layer 38 is formed so as to coincide with the end edge of the horizontal saucer portion 33b. Therefore, the waterproof layer 37 has the horizontal edge portion 35b end edge of the flange portion 35 and the outer end edge of the horizontal saucer portion 33b. (The distance is 100 mm as described above) and is fixed to the surface of the horizontal saucer 33b. As a result, waterproof construction around the drain device is facilitated, construction accuracy is improved, and waterproof performance around the drain device can be ensured.

FIG. 6 is a perspective view showing a related configuration of the drain main body 31 and the attachment device 33. The horizontal edge portion 35b of the flange portion 35 of the drain body 31 is fitted into a through-hole portion having the same shape as the outer edge of the horizontal edge portion 35b provided at the center portion of the horizontal saucer portion 33b, and the horizontal edge portion 35b and the horizontal saucer portion 33b. These surfaces form a continuous surface. The fixing device 33 and the flange portion 35 may be fixed by screwing through a screw hole (not shown) formed on the back surface of the flange portion 35, or the edge of the flange portion 35 (horizontal with the vertical edge portion 35a). The edge 35b) may be welded to the edge of the attachment device 33 (the vertical tray 33a and the horizontal tray 33b) that abuts and surrounds the edge 35b).
The latter welding can be expected to reduce the number of work steps, improve the continuous flatness, enhance the water tightness, etc., compared to screw fixing.

In FIG. 6, a heat insulating material may be sprayed in advance on the back surface of the continuous flat surface formed by the horizontal tray portion 33b and the horizontal edge portion 35b of the flange portion 35. The complicated work required when forming the heat insulation layer around the apparatus is not required. That is, as described above in the case of the longitudinal drawing according to FIG. 4, conventionally, at the construction site, the insulation material was sprayed from the lower side using a spraying device, but the heat insulation layer was formed in advance. By doing so, a high-quality heat insulating layer can be obtained in terms of thickness, fixability, and the like, and an operation using a spraying device is not required in a narrow construction site, so that construction efficiency can be improved and construction cost can be reduced.

FIG. 7 is a perspective view showing the back side of FIG. In the figure, 33c is the above-mentioned support member, and this support member 33c forms a frame body having an L-shaped cross section as shown in the drawing so as to accommodate and fix the vertical edge 35a of the flange portion 35. It has become.

BRIEF DESCRIPTION OF THE DRAWINGS It is a partially notched longitudinal cross-sectional view which shows the vertical drain apparatus which concerns on one Example of this invention, and the drainage structure by this. 3 is a perspective view showing a related configuration of a drain main body 21 and an attachment device 23. FIG. It is a perspective view which shows the back surface side of FIG. It is the partial cross section side view of the drain main body 21 in which the heat insulation layer was formed previously, and the attachment apparatus 23 which accommodates this. FIG. 2 is a partially cutaway longitudinal sectional view showing a so-called horizontal pulling type drain device according to the present invention and a drainage structure using the drain device. 4 is a perspective view showing a related configuration of a drain main body 31 and an attachment device 33. FIG. It is a perspective view which shows the back surface side of FIG. It is a partially cutaway longitudinal cross-sectional view showing a conventional example.

D, D1. . . . . . . . . . . . . Drain device K.I. . . . . . . . . . . . . . . . Opening P.P. . . . . . . . . . . . . . . . Deck plate (base)
H1. . . . . . . . . . . . . . . Heat insulation layer 21. . . . . . . . . . . . . . . Drain body 22. . . . . . . . . . . . . . . Drain cover 23. . . . . . . . . . . . . . . Mounting device 24. . . . . . . . . . . . . . . Pipe part 25. . . . . . . . . . . . . . . Flange portion 26. . . . . . . . . . . . . . . Saucer 27. . . . . . . . . . . . . . . Support member 28. . . . . . . . . . . . . . . Waterproof layer presser 30. . . . . . . . . . . . . . . Waterproof layer 31. . . . . . . . . . . . . . . Outer heat insulating layer 32. . . . . . . . . . . . . . . Drain cover 33. . . . . . . . . . . . . . . Mounting device 33a. . . . . . . . . . . . . . Vertical saucer 33b. . . . . . . . . . . . . . Horizontal saucer 33c. . . . . . . . . . . . . . Support member 34. . . . . . . . . . . . . . . Pipe part 35. . . . . . . . . . . . . . . Drain body 35a. . . . . . . . . . . . . . Vertical edge 35b. . . . . . . . . . . . . . Horizontal edge 36. . . . . . . . . . . . . . . Waterproof layer presser 37. . . . . . . . . . . . . . . Waterproof layer 38. . . . . . . . . . . . . . . Outer insulation layer

Claims (6)

A drain device mounting structure constructed in an opening formed in a roof base comprising an outer heat insulating layer and a waterproof layer affixed to the surface of the outer heat insulating layer, the drain device comprising a drain body having a pipe portion, An opening of the pipe part connected to a drain pipe in the opening part of the roof base, comprising a drain cover attached to the upper part of the drain body with a waterproof layer presser provided continuously to the outer peripheral edge of the lower end The drain body having a flange portion formed on the outer periphery of the end includes a tray and a center of the tray that are joined and constructed on the roof base so that the edge is separated from the peripheral edge of the opening by a predetermined distance at the periphery of the opening of the roof base. A disk-shaped support having a central opening formed from the lower end of a hanging part having a circular cross section formed from the periphery of the hole corresponding to the opening of the roof base and formed in the center of the hole. While being supported at a predetermined position in the opening in the roof bed by a member, the said holes being formed on the saucer surface of the surface and the pan of the flange portion is fitted the flange portion forms a continuous surface In addition, the end of the outer heat insulating layer facing the opening of the roof base fits in the edge of the tray so as to surround the outer periphery of the tray, and the end of the waterproof layer extends to the outer periphery of the opening of the pipe It is formed and fixed between the flange portion and the waterproof layer presser, and the waterproof layer is fixed to the entire surface of the tray that is bonded and fixed to the roof base around the flange portion so as to be stably fixed to the roof base. to the drain device mounting structure, characterized in that further said to the pan back surface formed in advance by blowing insulation insulation layer surface. 2. The drain device mounting structure according to claim 1, wherein the tray is formed in a square shape, the extension dimension from the flange end, i.e., the distance between the flange outer periphery and the tray outer periphery is 100 mm, and the waterproof layer is the flange portion. As a result of being fixedly bonded to the saucer over the entire circumference of 100 mm around the periphery, the roof portion is firmly fixed via the saucer over the circumference of the flange portion over the circumference of 100 mm. Drain device mounting structure. 3. The drain device mounting structure according to claim 1 or 2, wherein a heat insulating material is sprayed on the outer surface of the tray, the support member, and the tubular body to form a heat insulating layer, and the outer edge of the tray is surrounded by the heat insulating layer. A drain device mounting structure characterized in that a heat insulating layer continuous with an end portion of the outer heat insulating layer stored in conformity with is formed up to the support member. A drain pipe formed on the wall surface provided at the corner where the outer base layer and the roof base provided with a waterproof layer affixed to the surface of the outer heat insulating layer intersect with the vertical wall surface provided with the waterproof layer. A drain device mounting structure for horizontally draining the drain device, the drain device comprising a drain body having a flange portion on an outer periphery of an opening end of a pipe portion connected to the drain pipe, and a drain body mounting device. The flange portion is formed in a substantially L-shaped cross section by a vertical edge portion formed on the outer periphery of the open end of the tube portion and a horizontal edge portion formed integrally therewith, and the attachment device of the drain body is formed on the wall surface. together comprise a horizontal pan portion joined affixed to the vertical pan portion and the roof under the ground to be fixed, prior to each of said vertical edges and horizontal edges of the flange portion in the drain body mounting device Causes fitted so that the flange portion and the saucer portion surface of said horizontal pan portion and the vertical saucer section successive end portions of the outer heat insulating layer extending in the drain pipe direction roof under ground outer periphery of the horizontal pan portion The position that touches the terminal is the terminal position, and this terminal position fits the edge of the horizontal saucer part so that it surrounds the outer periphery of the horizontal saucer part. The waterproof layer is fixed to the roof base by being firmly fixed to the roof base by being fixed to the entire surface of the horizontal tray that is fixedly held by the presser and is bonded and fixed to the roof base around the flange portion of the roof base. A drain device mounting structure in which a heat insulating layer is formed in advance by spraying a heat insulating material. 5. The drain device mounting structure according to claim 4, wherein the horizontal tray portion is formed in a square shape, and the extension dimension of the flange portion from the horizontal edge end, that is, the distance between the flange portion outer peripheral end and the tray outer peripheral end is 100 mm. As a result, the waterproof layer is bonded and fixed to the tray around the flange portion over the entire circumference of 100 mm . As a result, the waterproof layer is firmly fixed to the roof base via the tray around the flange portion over the circumference of 100 mm. A drain device mounting structure characterized by being made to do so. 6. The drain device mounting structure according to claim 4 or 5, wherein a heat insulating material is sprayed on the back surface of the continuous flat surface formed by the horizontal edge portion of the flange portion so as to surround the outer periphery of the horizontal tray portion. A drain device mounting structure characterized in that a heat insulating layer continuous with an end portion of the outer heat insulating layer stored in conformity with an edge of the tray portion is formed up to the continuous flat surface.

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