JP2018184760A - Lateral roof drain repair method and repaired lateral roof drain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lateral roof drain repair method and a repaired lateral roof drain that can substantially prevent the diameter reduction of the lateral roof drain after repair.SOLUTION: First, a hollow thermal expansion tube 10 adapted to an inner diameter d0 of an existing sleeve pipe 5 is inserted into the sleeve pipe 5, is heated and expanded, and is crimped to an inner surface of the sleeve pipe 5. Next, the level of an S-type socket 14 is adjusted with respect to a level difference h between a rooftop waterproof sheet 9a and the sleeve pipe 5, and an outer connecting portion 14a of the S-type socket 14 is adhered to an inner end 10b of the thermal expansion tube 10. Next, a tube portion 16a of a unit tube 16 is adhered to an inner connecting portion 14b of the S-type socket 14, and a flange portion 16b of the unit tube 16 is welded to rooftop waterproof sheets 9a, 9c.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a method for repairing a horizontal roof drain that does not reduce its diameter, and a horizontal roof drain that has been repaired by this method.

The roof drain is provided on the roof of a building or the like and drains rainwater introduced from the roof or the like into a drain pipe (drain pipe) extending to the vicinity of the roof in the building.
The roof of the building is waterproofed, and the drain is renovated to maintain its waterproof performance.

The roof drain can be roughly classified into a vertical roof drain and a horizontal roof drain.
A method for repairing a horizontal roof drain is disclosed in Patent Document 1, for example.

JP 2014-101463 A

FIG. 1 is a cross-sectional view showing an example of a horizontal drain before renovation.
In this figure, 1 is a roof top surface, 2 is a roof wall of the roof, 3 is a drain port, 4 is a drain pipe installed outside the housing wall 2, and 5 is connected to the drain pipe 4 through the housing wall 2. A sleeve tube, 6 is a drain strainer attached to the drain, 7a is a heat insulating material covering the roof top surface 1, and 7c is a waterproof sheet (asphalt waterproof).
The space between the housing wall 2 and the sleeve tube 5 is sealed with, for example, polyurethane sealing.
In FIG. 1, in order to provide a water gradient, a level difference h of 20 to 30 mm is provided from the waterproof sheet 7c to the roof drain hardware (sleeve tube 5).

FIG. 2 is an explanatory diagram of a conventional horizontal roof drain repair method.
In this figure, 8 is a flexible pipe, and 9a and 9b are waterproof sheets (for example, PVC waterproof sheets). The flexible pipe 8 has a flange 8b attached to the end face of the flexible hollow pipe 8a.
In the conventional horizontal roof drain repair method, the flexible pipe 8 is inserted until the drain pipe 4 is lowered in order to cope with the level difference h between the waterproof sheet 7 c and the sleeve pipe 5.

However, the conventional horizontal roof drain repair method has the following problems.
The flexible hollow tube 8a is, for example, a flexible tube in which hard vinyl chloride or the like wound spirally is coated with soft vinyl chloride or the like, and has a thickness corresponding to the hard vinyl chloride or the like wound spirally. Therefore, the flexible pipe 8 needs to have a smaller diameter than the existing sleeve pipe 5.

For example, when the diameter of the existing sleeve pipe 5 is 75φ or 50φ, the diameter of the flexible pipe 8 needs to be 50φ or 32φ which is approximately two sizes smaller. In extreme cases, it was necessary to construct the flexible pipe 8 with a diameter of 32φ with respect to the diameter of the sleeve pipe 5 of 75φ.
As a result, there is a problem that the drain is easily clogged in the flexible pipe 8.
Hereinafter, the fact that the effective diameter of the roof drain is reduced (thinned) is referred to as “reduced diameter”.

  Conventionally, the diameter of the roof drain is based on the “Air Conditioning and Sanitation Engineering Society Supply and Drainage Sanitation Equipment Standards / Summary (SHASE-S206-2009)”, and the maximum rainfall per hour is 100 mm / h. The area is calculated. Therefore, if the caliber becomes smaller, it becomes impossible to cope with guerrilla heavy rain.

  The present invention has been developed to solve the above-described problems. That is, an object of the present invention is to provide a horizontal roof drain repair method and a modified horizontal roof drain that can substantially prevent the diameter of the horizontal roof drain after the repair.

According to the present invention, (A) a hollow thermal expansion tube that conforms to the inner diameter of an existing sleeve tube is heated and expanded by inserting the outer end portion thereof into the sleeve tube, and the inner surface of the sleeve tube is expanded. A thermal expansion tube crimping process for crimping;
(B) Adjusting the level of the S-type socket whose axis is offset with respect to the level difference between the rooftop waterproof sheet and the sleeve tube, and connecting the outer connection portion of the S-type socket to the inner end of the thermal expansion tube A socket bonding process for bonding;
(C) a unit roof welding method comprising: a unit pipe welding step of bonding a pipe portion of a unit pipe having a flange portion to an inner connection portion of the S-type socket, and welding the flange portion to the rooftop waterproof sheet. Is provided.

  Moreover, according to this invention, the horizontal roof drain improved by said horizontal roof drain repair method is provided.

  According to the present invention, a hollow thermal expansion tube is inserted into an existing sleeve tube, heated and expanded, and crimped to the inner surface of the sleeve tube, so that the inner surface of the thermal expansion tube has a diameter close to the inner surface of the sleeve tube. The diameter can be increased, and the diameter of the horizontal roof drain after the repair can be substantially prevented.

  Also, the outer connection part of the S-type socket is bonded to the inner end of the thermal expansion pipe, the pipe part of the unit pipe is bonded to the inner connection part of the S-type socket, and the collar part of the unit pipe is welded to the rooftop waterproof sheet To do. Thereby, it is possible to reliably prevent rainwater from entering the portion other than the horizontal roof drain from the rooftop waterproof sheet.

It is sectional drawing which shows an example of the horizontal drain before repair. It is explanatory drawing of the conventional horizontal roof drain repair method. It is a whole flowchart of the horizontal roof drain repair method by this invention. It is explanatory drawing of a thermal expansion pipe crimping process. It is explanatory drawing of a socket adhesion process. It is explanatory drawing of a unit pipe welding process.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

FIG. 3 is an overall flow diagram of the horizontal roof drain repair method according to the present invention.
In this figure, the horizontal roof drain repair method includes a thermal expansion tube crimping step S1, a socket bonding step S2, and a unit tube welding step S3.

FIG. 4 is an explanatory diagram of the thermal expansion tube crimping step S1.
In FIG. 3 and FIG. 4 (A), before the thermal expansion tube crimping step S1, roof waterproof sheets 9a and 9b are applied around the drainage opening of the existing horizontal roof drain in step S0.
In this example, the rooftop waterproof sheet 9a is constructed on the heat insulating material 7a and the waterproof sheet 7c on the rooftop surface 1, and the rooftop waterproof sheet 9b is constructed on the top surface and the inner surface of the frame wall 2 via the heat insulating material 7b. Yes.

  In the thermal expansion tube crimping step S1, the hollow thermal expansion tube 10 that matches the inner diameter d0 of the existing sleeve tube 5 is heated and expanded by inserting the outer end portion 10a into the sleeve tube 5, and the sleeve tube 5 is expanded. Crimp to the inner surface 5b.

FIG. 4B is a cross-sectional view and a side view of the thermal expansion tube 10.
The entire thermal expansion tube 10 is made of a thermal expansion resin that can be softened and expanded by heating with hot air.
The thermal expansion resin may be, for example, soft or hard polyvinyl chloride (PVC). Polyvinyl chloride can be softened by, for example, heating with hot air at 60 to 100 ° C. and can be thermally expanded. The coefficient of thermal expansion is, for example, 60 to 80 × 10 ⁻⁶ / K.
The thermal expansion tube 10 is not limited to polyvinyl chloride, and may be polyethylene, polypropylene, polyester, or the like as long as it is softened and expanded by warm air heating.

The outer diameter of the thermal expansion tube 10 is preferably smaller than the inner diameter d0 of the existing sleeve tube 5, for example, preferably 0.5 to 2 mm smaller than the inner diameter d0 of the sleeve tube 5.
Further, the thickness of the thermal expansion tube 10 is preferably waterproof and wear-resistant as long as the thermal expansion tube 10 is heat-expanded and adhered to the inner surface 5b of the sleeve tube 5 in the thermal expansion tube crimping step S1, for example, 1 to 3 mm. It is good to be.

In FIG. 3, the thermal expansion tube crimping step S1 includes steps (steps) S11 to S14.
In step S11, the thermal expansion tube 10 is inserted into the sleeve tube 5 while leaving its inner end portion 10b.
In this step (process), an adhesive is applied between the thermal expansion tube 10 and the existing sleeve tube 5. As the adhesive, it is preferable to use a silicon-based adhesive because of its adhesiveness, adhesion, and safety.

  In step S12, the hollow cylindrical caliber holding jig 12 is fitted and attached to the outer surface of the inner end 10b of the thermal expansion tube 10.

FIG. 4C is a cross-sectional view and a side view of the aperture holding jig 12.
The aperture holding jig 12 has a hollow cylindrical shape and has an inner diameter d2 corresponding to the inner diameter d1 of the outer connection portion 14a of the S-type socket 14 (see FIG. 5).

In step S13, the thermal expansion tube 10 is expanded from the inside by heating.
At this time, it is preferable to heat the inside of the thermal expansion tube 10 with a hot air machine (dryer).

FIG. 4D is an explanatory diagram of step S14.
In step S14, after the thermal expansion tube 10 is heated and expanded, the tube rubber packer 13 is inserted into the thermal expansion tube 10, the tube rubber packer 13 is expanded by air pressure, and the outer surface of the thermal expansion tube 10 is removed. The sleeve tube 5 is pressed against the inner surface 5b of the sleeve tube 5 for pressure bonding.
The pressure bonding time may be, for example, about 60 to 90 seconds, and the pressure bonding pressure may be, for example, about 0.1 to 0.2 MPa.

In step S14, the thermal expansion tube 10 is heated and pressure-bonded to the inner surface 5b of the sleeve tube 5 to a length that covers the connection portion (right end portion in the figure) of the existing sleeve tube 5. This length may be minimal.
Further, in this step (process), the outer diameter of the inner end portion 10 b at the time of thermal expansion of the thermal expansion tube 10 is corrected by the diameter holding jig 12. The corrected outer diameter of the thermal expansion tube 10 by the diameter holding jig 12 is slightly smaller than the inner diameter d1 of the inner connection portion 14b of the S-type socket 14, and is, for example, −0.5 to −1.0 mm. Good.

  Through the above-described thermal expansion tube crimping step S1, the thermal expansion tube 10 can be heated and expanded to be crimped to the inner surface of the sleeve tube 5. The inner surface of the thermal expansion tube 10 is expanded to a diameter close to the inner surface of the sleeve tube 5. can do. In this case, the inner diameter of the thermal expansion tube 10 is, for example, twice the inner diameter d0 of the sleeve tube 5−the thickness of the thermal expansion tube 10.

  In step S11, an adhesive is applied, and in step S14, the tube rubber packer 13 is expanded, and the outer surface of the thermal expansion tube 10 is brought into close contact with the inner surface 5b of the sleeve tube 5, so that the thermal expansion tube 10 is pressed. Can be joined to the inner surface 5b of the sleeve tube 5 in a watertight and firm manner.

  In step S12, the aperture holding jig 12 is fitted and attached to the outer surface of the inner end portion 10b of the thermal expansion tube 10, and in step S14, the outer end portion 10b of the thermal expansion tube 10 is thermally expanded. Since the diameter is corrected, the outer diameter of the inner end portion 10b of the thermal expansion tube 10 cured after cooling can be corrected to an appropriate size.

FIG. 5 is an explanatory diagram of the socket bonding step S2.
3 and 5A, in the socket bonding step S2, the level of the S-type socket 14 whose axis is offset is adjusted with respect to the level difference h between the rooftop waterproof sheet 9a and the sleeve tube 5. Further, the outer connection portion 14a (the left end in the drawing) of the S-type socket 14 is bonded to the inner end portion 10b (the right end portion in the drawing) of the thermal expansion tube 10.

FIG. 5B is a cross-sectional view and a side view of the S-type socket 14.
In this figure, the outer connection portion 14a and the inner connection portion 14b of the S-type socket 14 are cylindrical with the same inner diameter d1, and their axes are parallel to each other and spaced apart by an offset amount e.
The offset amount e is preferably larger than the level difference h between the rooftop waterproof sheet 9a and the sleeve tube 5.

In FIG. 3, the socket bonding step S2 includes steps (steps) S21 and S22.
In step S21, the inner connection portion 14b is rotated around the outer connection portion 14a of the S-type socket 14 to adjust the level with the rooftop waterproof sheet 9a.
In step S22, the outer connection portion 14a of the S-type socket 14 is bonded to the inner end portion 10b of the thermal expansion tube 10.

  Even if the level difference h between the rooftop waterproof sheet 9a and the sleeve tube 5 is different due to the steps S21 and S22 described above, the outer connection portion 14a of the S-type socket 14 is connected to the inner end portion 10b of the thermal expansion tube 10. And the inner side connection part 14b of the S-type socket 14 can be set in the optimal position with respect to the rooftop waterproof sheet 9a.

FIG. 6 is an explanatory diagram of the unit tube welding step S3.
3 and 6A, in the unit tube welding step S3, the tube portion 16a of the unit tube 16 is bonded to the inner connection portion 14b of the S-type socket 14, and the flange portion 16b of the unit tube 16 is attached to the rooftop waterproof sheet. It welds to 9a, 9c.
In this example, the roof waterproof sheet 9b is provided with an opening around the S-type socket 14 in order to secure a working space for the thermal expansion tube crimping step S1 and the socket bonding step S2. The rooftop waterproof sheet 9c is welded to the inside of the rooftop waterproof sheet 9b in order to close the opening.

FIG. 6B is a cross-sectional view and a side view of the unit tube 16.
In this figure, the unit tube 16 has a tube portion 16a and a flange portion 16b.
The tube portion 16a has a hollow cylindrical shape, and has an outer diameter d3 corresponding to the inner diameter d1 of the inner connection portion 14b of the S-type socket 14.
The collar part 16b is a hollow disk part provided in the edge part of the pipe part 16a.

The unit tube 16 may be made of a material that can be bonded to the S-type socket 14 and can be welded to the rooftop waterproof sheets 9a and 9c, and is made of, for example, polyvinyl chloride, polyethylene, polypropylene, polyester, or the like.
It is preferable that the pipe part 16a has waterproofness and mechanical strength, and it is good that the thickness is 1-3 mm.
The collar portion 16b is preferably foldable along the rooftop waterproof sheets 9a and 9c, and the thickness thereof is preferably, for example, 1 to 3 mm.

In FIG. 3, the unit tube welding step S3 includes steps (steps) S31 and S32.
In step S31, the tube portion 16a of the unit tube 16 is inserted into the inner connection portion 14b of the S-type socket 14, and the space therebetween is bonded.
In step S32, the flange portion 16b of the unit pipe 16 is welded to the rooftop waterproof sheets 9a and 9c. It is preferable that the flange portion 16b is bent at the broken line portion in FIG. 6B and set so that the tube portion 16a is close to the rooftop waterproof sheet 9a.

  By the unit pipe welding step S3 described above, the pipe portion 16a of the unit pipe 16 is bonded to the S-type socket 14, and the collar portion 16b of the unit pipe 16 is welded to the rooftop waterproof sheets 9a and 9c. Intrusion of rainwater from the waterproof sheets 9a, 9c can be reliably prevented.

  According to the above-described embodiment of the present invention, the hollow thermal expansion tube 10 is inserted into the existing sleeve tube 5 to be heated and expanded, and is crimped to the inner surface 5 b of the sleeve tube 5. Can be expanded to a diameter close to the inner surface 5b of the sleeve tube 5, and the diameter of the horizontal roof drain after the repair can be substantially prevented.

In this case, the inner diameter of the modified horizontal roof drain is “the inner diameter d0 of the sleeve tube 5−twice the wall thickness of the thermal expansion tube 10” inside the sleeve tube 5, and “S The inner diameter d1 of the inner connection portion 14b of the mold socket 14-twice the wall thickness of the tube portion 16a ".
In the above-described embodiment, the inner diameters d0 and d1 are substantially the same, and the wall thickness of the thermal expansion tube 10 and the tube portion 16a is, for example, 1 to 3 mm.

  Further, the outer connection portion 14 a of the S-type socket 14 is bonded to the inner end portion 10 b of the thermal expansion tube 10, and the tube portion 16 a of the unit tube 16 is bonded to the inner connection portion 14 b of the S-type socket 14. The flange portion 16b is welded to the rooftop waterproof sheets 9a, 9b, 9c. Thereby, the intrusion of rainwater from the rooftop waterproof sheets 9a, 9b, 9c to portions other than the horizontal roof drain can be reliably prevented.

  Note that the scope of the present invention is not limited to the above-described embodiments, is shown by the description of the scope of claims, and further includes all modifications within the meaning and scope equivalent to the description of the scope of claims.

h Level difference, e Offset amount, 1 Roof top surface, 2 Building wall, 3 Drain port,
4 drain tube, 5 sleeve tube, 5b inner surface, 6 drain strainer,
7a, 7b insulation, 7c waterproof sheet (asphalt waterproof), 8 flexible piping,
8a flexible hollow tube, 8b flange, 9a, 9b, 9c rooftop waterproof sheet,
10 thermal expansion tube, 10a outer end, 10b inner end, 12 caliber holding jig,
13 Tube rubber packer, 14 S type socket, 14a Outer connection part,
14b inner connection part, 16 unit pipe, 16a pipe part, 16b collar part

Claims (9)

(A) A thermal expansion tube crimping that heats and expands a hollow thermal expansion tube that matches the inner diameter of an existing sleeve tube by inserting the outer end of the hollow thermal expansion tube into the sleeve tube, and crimps the inner surface of the sleeve tube Process,
(B) Adjusting the level of the S-type socket whose axis is offset with respect to the level difference between the rooftop waterproof sheet and the sleeve tube, and connecting the outer connection portion of the S-type socket to the inner end of the thermal expansion tube A socket bonding process for bonding;
(C) a unit roof welding method comprising: a unit pipe welding step of bonding a pipe portion of a unit pipe having a flange portion to an inner connection portion of the S-type socket, and welding the flange portion to the rooftop waterproof sheet. .   In the thermal expansion tube crimping step, the thermal expansion tube is inserted into the sleeve tube leaving its inner end, and the thermal expansion tube is heated from the inside to expand, and the outer surface of the thermal expansion tube is The horizontal roof drain repair method according to claim 1, wherein the sleeve pipe is brought into close contact with the inner surface of the sleeve pipe and is crimped.   In the thermal expansion tube crimping step, after the thermal expansion tube is heated and expanded from the inside, a tube rubber packer is inserted into the thermal expansion tube, the tube rubber packer is expanded by air pressure, and the heat expansion tube is expanded. The horizontal roof drain repair method according to claim 1, wherein the outer surface of the expansion tube is brought into close contact with the inner surface of the sleeve tube and crimped.   In the thermal expansion tube crimping step, a hollow cylindrical caliber holding jig having an inner diameter corresponding to the inner diameter of the outer connection portion of the S-type socket is fitted to the outer surface of the inner end portion of the thermal expansion tube. The horizontal roof drain repair method according to claim 1, wherein the outer diameter of the inner end portion during thermal expansion of the thermal expansion pipe is corrected.   The horizontal roof drain repair method according to claim 1, wherein in the socket adhering step, the inner connection portion is rotated around the outer connection portion of the S-type socket to adjust the level with the rooftop waterproof sheet.   The horizontal roof drain repair method according to claim 1, wherein the roof waterproof sheet is constructed around the drainage port of an existing horizontal roof drain before the thermal expansion pipe crimping step.   The horizontal roof drain repair method according to claim 1, wherein, in the thermal expansion tube crimping step, the thermal expansion tube is heat-bonded to an inner surface of the sleeve tube to a length that covers a connection portion of the existing sleeve tube.   The horizontal roof drain repair method according to claim 1, wherein the thermal expansion pipe is entirely made of a thermal expansion resin that can be softened and expanded by heating with hot air.   A horizontal roof drain repaired by the horizontal roof drain repair method according to claim 1.

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