JPH0218169Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a drainage fitting, ie, a roof drain, for flat roofs, balconies, etc.

[Prior Art] Conventional roof drains of this type are generally made of cast iron, and have a structure as schematically shown in FIG. 5. That is, 2 in the figure is the main body of this roof drain, which is buried integrally in the roof 1 made of concrete, for example. This roof drain main body 2 has a dish shape, and a drain pipe 3 is connected to the lower part thereof.
The periphery of the roof drain body 2 is located approximately on the same plane as the upper surface of the roof 1, and the upper surfaces of the roof 1 and the roof drain body 2 are covered with asphalt, a waterproof sheet, or a waterproof layer covered with protective mortar on the asphalt. 4 will be constructed. Also,
A waterproof layer holding member 4 is stacked on the upper surface of the roof drain main body 2, and this waterproof layer holding member 4 is secured by a plurality of stud bolts 6 protruding from the main body 2 and nuts 7 screwed onto these stud bolts. The waterproof layer 4 is clamped between the main body 2 and the waterproof layer 4 to prevent the waterproof layer 4 from shifting. Further, a strainer 8 is fitted over the roof drain main body 2 and is configured to remove dust and the like.

However, such conventional roof drains are entirely made of cast iron, and their thermal expansion is different from that of concrete, and cast iron is highly brittle, so cracks occur due to differences in thermal expansion, leading to water leakage. There was a problem that caused this.

In addition, in this conventional roof drain, when the waterproof layer deteriorates and loses its elasticity, the grip between the roof drain body and the waterproof layer holding member becomes loose, and the repeated thermal expansion and contraction of this waterproof layer causes There were problems such as the waterproof layer of the lever being displaced and the end of the waterproof layer getting into the drain pipe, causing the drain pipe to become clogged.

[Problems to be solved by the invention] This invention has no cracks in the roof drain body,
Another object of the present invention is to provide a roof drain that can reliably hold a waterproof layer and reliably prevent clogging of drain pipes due to displacement of the waterproof layer.

[Means for solving the problems and their effects] In the present invention, a roof drain body is formed of a stainless steel plate, a non-slip member with multiple holes is attached to the top surface of the roof drain body, and a non-slip member with multiple holes is attached to the top surface of the roof drain body. The waterproof layer to be installed is integrated with this anti-slip member, and the waterproof layer holding member is formed of a stainless steel plate, and this waterproof layer holding member is attached to the roof drain with bolts, and the waterproof layer holding member and the roof drain main body are attached. A waterproof layer is sandwiched between the two. Therefore, these roof drain bodies, waterproof layer pressing members, etc. have elasticity and absorb differences in thermal expansion, etc., so that cracks and the like do not occur. In addition, even if this waterproof layer deteriorates and loses its elasticity, the elasticity of the waterproof layer pressing member can maintain the pressure on this waterproof layer, and further, the waterproof layer is integrated with the anti-slip member, and The waterproof layer is reliably held and its displacement is reliably prevented.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4.

12 in the figure is a roof drain body, which is buried in the concrete roof 11. The roof drain main body 12 is press-molded from a stainless steel plate, and has a conical dish-shaped portion 12a at the periphery and a stepped receiving recess 12b at the center. Further, a drainage hole is formed in the center of the roof drain body 12, and a drainage pipe is connected thereto. Further, in the center of the roof drain main body 12, there is provided a retirer member 23 that surrounds the drainage hole and projects downward. This reducer member 23 is formed from a stainless steel plate, and has a truncated conical shape with a smaller diameter at the lower end. This reducer member 23 is welded to the bottom surface of the roof drain main body 12. In addition, the roof drain body 12 mentioned above
A flange portion 12d is protruded from the peripheral edge of the drainage hole, and this flange portion 12d is fitted into the inner circumferential surface of the upper end portion of the retirer member 23. Further, a fitting flange portion 24 having an L-shaped cross section is integrally formed at the upper end portion of this retirer member 23, and this fitting flange portion 24 is used to support the roof drain main body 12 when it is attached. It is configured to fit into the outer peripheral edge of the upper end of the cylindrical spacer member 25, position the roof drain main body 12 concentrically with the spacer 25, and provide reinforcement. The roof drain main body 12 is constructed such that its outer peripheral edge is located on the same plane as the upper surface of the roof 11, and a waterproof layer 14 such as asphalt or a waterproof sheet is applied to these upper surfaces. Then, the dish-shaped portion 12a of this roof drain main body 12
An anti-slip member 19 is attached to the upper surface of the holder. This anti-slip member 19 is made by punching out a stainless steel plate, that is, punching metal, into an annular dish shape in which a large number of holes 30 are formed. A stepped portion 19a is formed to match. Further, the above-mentioned hole 30 is formed so that its edge protrudes upward, as shown in FIG.
This anti-slip member 19 is tightly attached to the upper surface of the dish-shaped portion 12a of the roof drain main body 12,
It is attached by spot welding, etc. The waterproof layer 14 is filled into the holes 30 of the anti-slip member 19 and integrated with the anti-slip member 19, so that the waterproof layer 14 is prevented from shifting. In addition, a plurality of protrusions 2 are provided on the inner peripheral edge of the dish-shaped portion 12a of the roof drain main body 12.
0 is formed along the circumferential direction. Moreover, an annular waterproof layer pressing member 15 is stacked on top of the roof drain main body 12. This waterproof layer pressing member 15 is formed by punching out a stainless steel plate into an annular shape, and its outer diameter is formed to approximately match the diameter of the stepped portion 12c of the roof drain body 12. Further, a plurality of stud bolts 16 are provided protruding from the bottom surface of the receiving recess 12b of the roof drain main body 12. These stud bolts 16 pass through holes formed in the inner peripheral edge of the waterproof layer pressing member 15, and these stud bolts 16
A nut 16 is screwed into the tip of each of the two. By tightening these nuts 17, the waterproof layer 14 is sandwiched between the waterproof layer pressing member 15 and the roof drain main body 12, thereby preventing the waterproof layer 14 from shifting. In this case, the waterproof layer pressing member 15 is elastically deformed by tightening the nut 17, and its elastic force pinches the waterproof layer 14, causing the waterproof layer 14 to deteriorate and lose its elasticity. The structure is such that this clamping pressure does not loosen even if the In addition, this waterproof layer pressing member 15
Since the diameters of the stepped portion 12c of the roof drain 12 and the stepped portion 12c of the roof drain 12 are formed to be approximately equal, the waterproof layer 14 is compressed in a bent state between the edge of the waterproof layer pressing member 15 and this stepped portion 12c, and the waterproof layer 14 The structure is such that displacement of the layer 14 is more reliably prevented. Further, a strainer 18 is further stacked on this waterproof layer pressing member 15, and the above-mentioned waterproof layer pressing member 1
It is attached by a bolt 21 protruding from 5 and a cap nut 22 screwed into the bolt.

Further, the surfaces of the roof drain body 12, the waterproof layer pressing member 15, the strainer 18, and other members are colored so as to absorb sunlight. This coloring is achieved by forming an oxide film of a predetermined thickness on the surface of stainless steel, and coloring occurs due to the interference of light in this film. A so-called selective absorption film is formed to suppress long-wavelength infrared radiation from these heated components, and when these components are heated by sunlight to as high a temperature as possible, and when sunlight is irradiated in winter, It is designed to quickly melt adhering snow and ice.

Next, construction of such a roof drain will be explained with reference to FIG. First, a temporary fixing bolt 41 is erected from the roof formwork 40, and the roof drain body 12 is attached to the formwork 40 with this bolt as the center.
It is placed on top and supported by a cylindrical spacer 25.
Then, a band-shaped temporary fixing jig 44 with a hole formed in the center is inserted into this temporary fixing bolt 41, and both ends of this temporary fixing jig 44 are brought into contact with the bottom surface of the receiving recess 12b of the roof drain main body 12. Let me, butterfly nuts 43
This roof drain main body 12 is fixed to this formwork 40 by tightening with. In this case, the outer peripheral surface of the upper end of the spacer 25 fits into the fitting flange portion 24 of the retirer member 23 of the roof drain body 12, and the spacer 25 and the roof drain body 12 are automatically positioned concentrically.

Then, in this state, concrete for the roof 11 is poured. After the concrete has solidified, the formwork 40 is removed, a waterproof layer 14 is applied thereon, and the waterproof layer pressing member 15 and strainer 18 are attached thereon. In this case, a waterproof layer 14 made of asphalt or the like applied to the upper surface of the roof drain body 12 is filled into the numerous holes 30 of the anti-slip member 19, and the waterproof layer 14 and the anti-slip member 19 are integrated. , displacement of this waterproof layer 14 is completely prevented. In addition, the above spacer 2
The drain pipe 13 is inserted into the annular space between the drain pipe 5 and the retirer member 23. In this case, this spacer 2
5 and the roof drain main body 12 are the fitting flange part 2
4, the drainage pipe 13 is reliably prevented from becoming uninsertable.

Note that the present invention is not limited to the above embodiments. For example, the above-mentioned anti-slip member is not necessarily limited to punched metal, but may be made of so-called expanded metal, wire mesh, or a large number of cut-and-raised pieces. Any material, such as a thin metal plate, may be used as long as it has a large number of holes for filling and integrating the waterproof layer. Moreover, this anti-slip member is not limited to an annular integral member, and a plurality of anti-slip members may be attached to the upper surface of the roof drain main body.

Moreover, it is not always necessary to form a stepped portion on the dish-shaped portion of the roof drain main body.

[Effects of the invention] As described above, in the present invention, a non-slip member with a large number of holes is attached to the top surface of the dish-shaped portion of the roof drain main body, so that the waterproof layer is filled into the holes of this non-slip member. Since it is integrated, this waterproof layer does not shift, and there are effects such as reliably preventing this waterproof layer from being pushed out into the drain hole and causing clogging of the drain hole.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of one embodiment of the present invention, Fig. 2 is a perspective view of the anti-slip member, and Fig. 3 is a -
4 is a sectional view showing the construction state of the roof drain main body, and FIG. 5 is a longitudinal sectional view of a conventional roof drain. 12...Roof drain main body, 12a...Dish-shaped part, 12c...Step part, 14...Waterproof layer, 15...
Waterproof layer pressing member, 19... Anti-slip member, 19a
...Stepped section, 30...hole.

Claims (1)

[Scope of utility model registration request] A dish-shaped roof drain body made by press-molding a stainless steel plate, and a waterproof layer made of a plate-shaped material attached to the top surface of the roof drain body and formed with many holes, are filled in these holes. A roof drain characterized by comprising: an anti-slip member that is integrated with the waterproof layer; and a waterproof layer holding member made of a stainless steel plate that is attached to the roof drain body with bolts and that holds the waterproof layer between the roof drain body and the roof drain body. .