JP2010209611A - Roof drain unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roof drain unit improving flow of discharge water and preventing the water from staying. <P>SOLUTION: The roof drain unit is used for a drainage pipe arranged on a sidewall of a roof of a building where a waterproof sheet is laid. The roof drain unit includes: a drain body comprising a vertical part having a drain cylinder arranged at the substantially center part and a horizontal part arranged below the vertical part in a manner of projecting in the direction opposite to that of the drain cylinder, and formed into a substantially L-letter shape as a whole; and a hose having a bellows-like form at least on the outer peripheral surface and inserted into the drainage pipe in the state of being joined to the drain cylinder. A dropping-in part is provided near the drain cylinder in the horizontal part of the drain body. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a roof drain unit for connecting to a rainwater drain pipe disposed on a roof of a building and provided vertically along the building frame.

  2. Description of the Related Art Conventionally, for example, a roof drain provided for drainage on the roof of a building such as a building is provided to connect to a rainwater drain pipe provided vertically along the building frame.

  For example, Patent Document 1 listed below discloses a horizontal drain having a drain rod formed of a material that can be deformed so as to conform to the base shape, and a flexible hose joined to the drain rod. Further, when stainless steel band fastening is used for fixing the drain rod, a stainless steel pipe is fitted inside the drain rod pipe so that the drain rod is not crushed. However, in the case of the drain having the above-described structure, there is a problem that the stainless steel pipe becomes a step and becomes a resistance when draining, and the drainage stays.

  Further, Patent Document 2 below discloses a roof drain in which a step portion is provided on the lower surface portion of the roof drain to improve the flow of drainage. However, in the roof drain having the above configuration, the drain pipe portion itself forms a step that obstructs the flow of drainage (see FIG. 3), and there is a problem that the waste water stays at the step portion.

JP-A-7-76908 Japanese Utility Model Publication No. 6-73221

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a roof drain unit that improves the flow of drainage and prevents the occurrence of stagnation.

  The inventors of the present application have examined a roof drain unit in order to solve the conventional problems. As a result, the inventors have found that the above problems can be solved by adopting the following configuration, and have completed the present invention.

  That is, the roof drain unit according to the present invention is a roof drain unit used for a drain pipe provided on a side wall on a roof of a building in which a waterproof sheet is laid in order to solve the above-described problem, and a drain tube is provided at a substantially central portion. A drain body having a vertical portion provided in a vertical direction and a horizontal portion projecting in a direction opposite to the drainage pipe at a lower portion of the vertical portion, and a generally L-shaped drain body, and at least the outer peripheral surface is bellows-shaped And a hose inserted into the drain pipe in a state of being joined to the drain cylinder, and a drop portion is provided near the drain cylinder in the horizontal portion of the drain body. And

  According to the said structure, by providing a dropping part in the drain pipe vicinity in the horizontal part of a drain main body, waste_water | drain can be discharged toward a drain pipe, without receiving resistance. As a result, it is possible to prevent the drainage from staying in the vicinity of the drain tube.

  In addition, if the drainage flows directly from the drain tube of the drain body into the drain pipe provided on the side wall, the drainage may flow around the outlet portion of the drain tube and back flow. However, as in the present invention, by connecting a hose whose outer peripheral surface is bellows to the drain cylinder of the drain main body, the drainage flows in the hose. As a result, it is possible to prevent drainage from flowing back to the lower side of the drain tube and backflow, and as a result, efficient drainage is possible.

  In the above configuration, it is preferable that a step portion is provided in a horizontal portion of the drain body so that the waterproof sheet is placed on the horizontal portion of the drain body so as to be flush with the waterproof sheet. This makes drainage even better.

  In the above configuration, the pitch interval of the bellows-shaped bent portion in the hose is larger in the range of 5 to 25 mm than the other portions, and the diameter of the core material is narrow in the range of 1 to 5 mm. Is preferred. Thereby, for example, even when the drain pipe is bent, the hose inserted therein can be bent according to its shape, and as a result, it can be drained without staying. .

  According to the present invention, it is possible to prevent the drainage from staying in the vicinity of the drain tube by providing the dropping portion in the vicinity of the drain tube of the drain body. Furthermore, a hose having at least an inner peripheral surface is joined to the drain tube, and this hose is inserted into a drain pipe provided on the side wall, so that it is efficient while preventing backflow. Allows drainage.

It is a disassembled perspective view which shows the roof drain unit of this invention typically. It is sectional drawing which shows the said roof drain unit typically. It is a cross-sectional schematic diagram which shows the junction part of the drain tube and hose in the said roof drain unit.

  The roof drain unit of the present invention will be described below with reference to FIGS. However, parts that are not necessary for the description are omitted, and some parts are illustrated by being enlarged or reduced for easy explanation.

  FIG. 1 is an exploded perspective view schematically showing a roof drain unit of the present invention. FIG. 2 is a cross-sectional view schematically showing the roof drain unit. As shown in FIG. 1, a roof drain unit 10 is used for a drain pipe 11 provided on a side wall 4 on a roof of a building laid with a waterproof sheet, and includes a drain main body 1 and a hose 2.

  The drain main body 1 includes a vertical portion 5 provided with a drain tube 7 and a horizontal portion 6 projecting in a direction opposite to the drain tube 7 at a lower portion of the vertical portion 5, and is configured in a substantially L shape as a whole. ing.

  The drain tube 7 is provided at a substantially central portion of the vertical portion 5. The shape of the opening part of the drain tube 7 is not specifically limited, For example, a substantially circular shape, a substantially rectangular shape, etc. can be illustrated. Further, the size of the opening portion of the drain tube 7 is not particularly limited, and can be appropriately set according to the size of the hose 2. Specifically, for example, when the opening is circular, the diameter is preferably within a range of 40 to 400 mm. However, since the drain cylinder 7 is fitted by being inserted into the hose 2, it is preferably smaller than the hose 2. A configuration in which the hose 2 is inserted into the drain tube 7 is not preferable because the hose 2 may become an obstacle that hinders the flow of drainage at the joint. Moreover, although the length of the drain tube 7 is not specifically limited, Generally, it is preferable to exist in the range of 100-1000 mm from the opening part, and it is more preferable to exist in the range of 150-500 mm.

  In addition, a drop portion 8 is provided near the drain tube 7 in the horizontal portion 6. The dropping of the dropping unit 8 is not particularly limited, but is preferably within a range of 1 to 10 mm from the viewpoint of preventing the drainage from staying. Moreover, it is preferable that the thickness of the dropping part 8 exists in the range of 0.5-3 mm, for example. Moreover, it is preferable that there is no level | step difference between the dropping part 8 and the drain cylinder 7, and it is provided continuously and has a structure which does not disturb the flow of drainage.

  The constituent material of the drain body 1 is not particularly limited, and examples thereof include EPDM (ethylene propylene diene rubber). Moreover, although the thickness of a drain main body is not specifically limited, From a viewpoint of reducing the level | step difference with respect to the side wall 4 and the foundation | substrate 9, it is preferable to exist in the range of 1.0-2.0 mm.

  The hose 2 has a bellows shape at least on the outer peripheral surface thereof. Further, it is preferable that the pitch interval of the bellows-shaped bent portion is larger in the range of 5 to 25 mm than the other portions, and the diameter of the core material is narrower in the range of 1 to 5 mm than the other portions. . Thereby, also in the elbow part where the drain pipe 11 is bent, the hose 2 can be bent according to the shape, and as a result, drainage without staying is enabled. In addition, although the pitch interval of the part which is not bent is not specifically limited, Usually, it exists in the range of 10-12 mm. Moreover, the diameter of the core material of the part which is not bent is in the range of 1-5 mm.

  The hose 2 is inserted into a drain pipe 11 provided on the side wall 4. When drainage is directly flowed into the drain pipe from the drain cylinder 7, the drainage may flow back into a gap formed between the drain cylinder 7 and the drain pipe 11. In the present invention, the hose 2 is joined to the drain tube 7 to prevent the backflow from occurring and to improve drainage. About the junction part, it is preferable that the hose 2 is not bellows-shaped.

  It does not specifically limit as a constituent material of the hose 2, For example, a soft vinyl chloride resin can be illustrated. Since the hose mainly composed of soft vinyl chloride resin is excellent in flexibility and flexibility, the hose 2 can be easily inserted even when the drain pipe 11 is bent. Moreover, it does not specifically limit as a constituent material of the core material of the hose 2, A conventionally well-known thing is employable.

  The shape of the tip of the hose 2 (the side not joined to the drain tube 7) is not particularly limited because the hose 2 has a bendable structure inside the drain pipe 11.

  As shown in FIG. 2, an expansion sheet 12 is provided between the drain body 1 and the base 9. In addition, the upper portion 14 of the extension sheet 12 in the drain body 1 is designed so that its thickness is thinner than the thickness of the drop portion 8. The thickness of the upper portion 14 is preferably in the range of 0.5 to 5 mm, for example. Examples of the expansion sheet 12 include those made of butyl rubber (non-vulcanized), for example.

  A part of the horizontal portion 6 in the drain body 1 is covered with a waterproof sheet 13. The portion covered with the waterproof sheet 13 is provided with a step 15 so that the waterproof sheet and the upper portion 14 are flush with each other. Thereby, while improving the storing property of the drain main body 1 with respect to the roof of the building in which the waterproof sheet 13 is laid, drainage is made more favorable. The thickness of the step portion 15 is designed to be thinner than the thickness of the drop portion 8. Specifically, for example, it is preferably within a range of 0.5 to 3 mm. In addition, the thickness of the upper portion 14 is preferably substantially equal to the sum of the thickness of the step portion 15 and the thickness of the waterproof sheet 13.

  The drain tube 7 and the hose 2 are joined by inserting the drain tube 7 into the hose 2 and using an adhesive 21 at the contact portion (see FIG. 3). Further, as shown in the figure, the hose 2 and the drain tube 7 are fixed by, for example, a heat-shrinkable band 22. At the time of fixing with the band 22, it is preferable to insert a mold inside the drain tube 7 to prevent the shape of the drain tube 7 from being broken due to thermal contraction of the band 22. By performing such joining, high water tightness is obtained at the joint between the drain tube 7 and the hose 2, and leakage at the joint can be prevented. The adhesive 21 is not particularly limited, and examples thereof include chloroprene rubber.

  The roof drain unit 10 is preferably provided with a strainer 3 supported by the drain body 1. Examples of the strainer 3 include those formed by bending a sheet metal into a U shape so that the side surface shape is a right triangle. Moreover, it is preferable that a plurality of openings 23 having a predetermined shape are provided on the three surfaces of the strainer 3.

DESCRIPTION OF SYMBOLS 1 Drain body 2 Hose 3 Strainer 4 Side wall 5 Vertical part 6 Horizontal part 7 Drain tube 8 Drop part 9 Base 10 Roof drain unit 11 Drain pipe 12 Sheet for extension 13 Waterproof sheet 15 Step part 21 Adhesive 22 Band 23 Opening part

Claims (3)

A roof drain unit used for a drain pipe provided on a side wall of a roof of a building laid with a waterproof sheet,
A drain main body comprising a vertical portion provided with a drain tube at a substantially central portion, and a horizontal portion projecting in a direction opposite to the drain tube at a lower portion of the vertical portion, and the entire body is configured in a substantially L shape,
At least the outer peripheral surface is bellows, and has a hose inserted into the drain pipe in a state of being joined to the drain cylinder,
A roof drain unit, wherein a drop portion is provided in the vicinity of the drain tube in the horizontal portion of the drain body.   The step part is provided in the part in which the said waterproof sheet is mounted in the horizontal part of the said drain main body so that it may become flush with this waterproof sheet. Roof drain unit. The bellows-shaped bent portion of the hose has a pitch interval larger than that of other portions within a range of 5 to 25 mm, and a diameter of a core material is narrow within a range of 1 to 5 mm. The roof drain unit according to 1 or 2.