JP2015045157A - Waterproof structure of drain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof construction of a drain, having no joint due to adhesive part, improved in workability for water-proofing, having weathering resistance, and excellent in adhesion with an existing section, since a drain cylindrical body part and a flange are integrally molded.SOLUTION: Using a urethane drain member made by integrally molding a drain cylinder body part a flange made by extending an end of the drain cylinder body outward at a right angle or an angle close to it with a urethane resin, the drain cylinder body is inserted into an existing drain pipe in an existing drain outlet, and the flange is adhered on the circumference of the drain outlet by the urethane resin backfilling around the existing drain outlet while the upper part of the flange is covered by a urethane waterproof material.

Description

  The present invention relates to a drain waterproof structure in a waterproof construction such as repair work and repair work on a rooftop of a building or a veranda in a drain shim system.

  In recent years, as a waterproofing method for rooftops, balconies, corridors and the like of buildings such as apartment buildings, a waterproofing method using a polyurethane-based waterproofing film has been widely adopted. This waterproof construction method applies polyurethane-based resin directly to the construction site, so compared to the sheet waterproof construction method using molded sheets made of vinyl chloride resin, etc. There are many achievements in renovation work.

  By the way, in the renovation work for rooftops, balconies, corridors, etc., the existing drains made of metal or the like installed at the drain outlet at the time of new construction are often aged. In this case, if the polyurethane film waterproof material is applied directly with the existing drain remaining, cracks will occur at the joint between the drain and the waterproof material layer due to the difference in thermal expansion coefficient between the metal drain and the polyurethane film waterproof material. There is a risk of water leaking due to the intrusion of water into the building housing.

  Therefore, when a polyurethane film waterproofing material is applied directly with the existing drain left, the joint surface must be reinforced with glass cloth or the like for the purpose of improving crack resistance. Since the waterproof material does not have sufficient adhesive strength with metal, a dedicated primer is required.

The following patent document describes a drain cover that can be coated so as to conform to the shape of the ground around the drain outlet, has sufficient adhesion to the waterproof layer, and can maintain waterproof performance for a long period of time, and a polyurethane-based coating waterproof using the drain cover 4 and 5, the existing drain 30 fixed to the base 60 by the anchor bolt 40 is subjected to a renovation work using the drain cover 10 as shown in FIGS. A drain pipe 50 is connected to the existing drain 30.
Japanese Patent No. 3839694

  The drain cover 10 includes a flexible hose 11 and a flanged sheet 12 made of a flexible polyurethane resin and attached to the opening edge of one end thereof in a flange shape.

  The opening edge portion 11 a at one end of the flexible hose 11 and the opening edge portion 12 a of the flange-like sheet 12 are joined by the joining portion 13.

  As a joining method, conventionally known joining methods such as adhesives, heat welding or solvent welding can be used, and among these, solvent welding is preferred.

  The other end of the flexible hose 11 is inserted into the drain outlet, and the flange-like sheet 12 covers the peripheral edge of the drain outlet and is arranged so as to guide the drainage into the drain outlet. The polyurethane-based coating film waterproofing layer 20 is formed by applying a polyurethane-based coating film waterproofing material over the base 60.

  According to Patent Document 1, the flange-like sheet 12 is made of a flexible polyurethane resin. As a result, it can be easily covered following the shape of the base surface to be installed, and further, since it is the same kind of material as the polyurethane-based waterproofing material coated on the flange-like sheet 12 in a later step, it is bonded. The flange-like sheet 12 and the waterproof layer are integrated, and high waterproof performance can be obtained.

  However, the thing of the said patent document 1 is what consists of two members with the other end of the flexible hose 11 inserted in the inside of a drain outlet, and the flange-shaped sheet | seat 12, and both need to adhere | attach and an adhesion part is attached to an adhesion part. Occurs. As a result, as shown in FIG. 4, the opening edge of the flange-like sheet 12 bends downward and protrudes.

  Although the flange-like sheet 12 can enhance the airtightness with the base 60 and the like, when the drain cover 10 is placed on the existing drain 30 as it is, it is not bonded at the joint with the flexible hose 11. There may be gaps.

  The object of the present invention is to eliminate the inconvenience of the above-mentioned conventional example, and the drainage cylinder part of the urethane drain cover member and the flange are integrally formed of urethane resin, so there is no joint by the adhesive part, and the workability in waterproofing is improved. And it is providing a waterproof structure of a drain which is weatherproof and favorable also about the adhesion | attachment with the existing part.

  In order to achieve the above object, the present invention according to claim 1 is formed by integrally molding a drainage cylinder portion and a flange having an end portion of the drainage cylinder extending at a right angle or close to the outside with urethane resin. Using the urethane drain cover member, insert the drain cylinder of the urethane drain cover member into the drain pipe in the existing drain, adhere the flange of the urethane drain cover member with urethane resin on the existing drain, and The gist is that it can be pressed with a urethane waterproof material.

  According to the first aspect of the present invention, as the urethane drain cover member, the drainage cylinder part and the flange that extends the end part of the drainage cylinder at a right angle or close to the outside are made of urethane resin. Since it is integrally molded, there are no joints due to seams, it is easy to manufacture, and no bending or protrusion occurs. Moreover, because it is made of pure urethane, it is slow in UV degradation and has weather resistance.

  In addition, since the top of the flange is pressed with a urethane waterproof material, it is familiar with the urethane waterproof material used as the presser, and there is no influence of deterioration between materials.

  The gist of the present invention described in claim 2 is that the urethane waterproof material is a molded urethane sheet.

  According to the second aspect of the present invention, since the presser on the flange is a molded urethane sheet, it is only necessary to lay this on, and since the flange can be easily and quickly constructed, and the flange is in a sheet form, Suitable waterproofing is obtained.

  The gist of the present invention described in claim 3 is that the urethane waterproof material is a sprayed urethane waterproof material.

  According to the third aspect of the present invention, it is possible to press with the same sprayed urethane waterproof material as before, and the flange is familiar with the urethane waterproof material that serves as the presser.

  The gist of the present invention is that the drain mat is laid under the flange of the urethane drain cover member, and the end of the drain mat is connected to the gap between the existing drain pipe and the drain cylinder.

  According to the present invention described in claim 4, the flow of free water can be secured by forming a gap between the existing drain pipe and the drain cylinder, and the waterproof free water can be drained by laying the drain mat. Become.

  As described above, the waterproof structure of the drain of the present invention is formed by integrally molding the drain cylinder part and the flange of the urethane drain cover member with urethane resin, so there is no joint by the adhesive part, and the workability in waterproofing is improved. And it has a weather resistance and is favorable also about adhesion | attachment with the existing part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal side view showing a first embodiment of the drain waterproof structure according to the present invention, and shows a case where renovation work is applied to an existing drain 30 to which a drain pipe 50 is connected as in the conventional example.

  In the figure, reference numeral 17 denotes a concrete frame (underground) such as a rooftop or a veranda floor. Asphalt waterproofing 6 is applied as an existing material, and a heat insulating material 5 is provided. FIG. 1 shows a case where there is a waterproof presser concrete 4.

  Existing drain is generally made of metal such as cast iron, and consists of drain body and parts such as strainer and waterproof layer presser, etc., but removes the strainer and waterproof layer presser and other parts without removing the drain body. Use it as it is. There are various shapes for the drain body, and if the screw that secures the parts such as the waterproof layer retainer or the strainer protrudes and is embedded on the surface, remove the protrusion or remove it, or remove the protrusion. If there are other large irregularities, scrape with a sander if necessary.

  The present invention is a urethane drain formed by integrally molding a portion of the drainage cylinder 2 and a flange 3 extending from the end of the drainage cylinder 2 at a right angle or close to the outside with urethane resin as shown in FIG. The cover member 1 is used.

This urethane drain cover member 1 is made of pure urethane for spraying (for example, registered trademark Cosmic RIM · S100, S200 of Uplex Co., Ltd.), and the flange 3 and the drainage cylinder 2 part are manufactured by integral molding in advance at the factory. To do. The stock solution properties and coating film properties of these Cosmic RIM · S100 and S200 are shown in Table 1 below.

As can be seen from Table 1, in the tensile performance test specified in JIS A 6021, the tensile strength is 12 N / mm ² or more and the elongation at break is 380% or more. Here, the tensile performance test specified in JIS A 6021 is a dumbbell-shaped No. 3 shape, which is the tensile strength when the specimen is pulled at a tensile speed of 500 mm / min until the specimen breaks and the elongation at break. is there.

  If the standard dimensions do not fit, the flange 3 and the drainage cylinder 2 are stretched according to the site dimensions. As shown in the figure, the flange 3 can be round or square and can be cut according to the size of the site.

  The urethane thickness of the urethane drain cover member 1 is set to approximately 2 mm in order to ensure weather resistance.

  The outer diameter of the drainage portion is about 4 mm smaller than the inner diameter of the existing drainage pipe 50 in order to ensure free water flow. In addition, the insertion length of the drainage part is lowered to below the joint between the existing drain and the trough to improve the water stoppage, so 100 mm is standard.

  The drain cylinder 2 was inserted into the existing drain pipe 50 in the existing drain 30, and the flange 3 of the urethane drain cover member 1 was bonded onto the existing drain 30 using the urethane resin 7 as an adhesive.

  The urethane resin 7 can use a one-component polyurethane sealant, and as a non-bleed type without a plasticizer, the product name “Auton Non-Bleed Qick” (room temperature curing type) of Auto Chemical Industry Co., Ltd. or The product name “Super Sealant TF2000” is suitable.

  In the figure, reference numeral 16 denotes mortar, which may be existing. The urethane resin 7 is filled as an extending portion of the mortar 16 and constitutes a bed portion on which the flange 3 of the urethane drain cover member 1 is placed together with the mortar 16.

  Further, the upper side of the flange 3 of the urethane drain cover member 1 is pressed by a urethane waterproof material 8. A molded urethane sheet is used for the urethane waterproof material 8, and its end is overlapped with the flange 3. As the molded urethane sheet, a factory-made sheet using the same pure urethane for spraying as the urethane drain cover member 1 (for example, registered trademark Cosmic RIM · S100, S200 of Uplex Co., Ltd.) can be used.

  In the figure, 14 is a strainer, but a strainer slip stopper 15 made of urethane material is installed later.

  As another embodiment, a sprayed urethane waterproof material may be used as the urethane waterproof material 8. In this case, registered trademark Cosmic RIM · S100 and S200 of Uplex Co., Ltd. can be used similarly.

  A drainage mat 9 made of nonwoven fabric or the like is laid under the urethane resin 7 below the flange 3 of the urethane drain cover member 1, and the end of the drainage mat 9 is connected to the gap between the existing drainage pipe 50 and the drainage cylinder 2. You may do it. A CA mat G (a self-adhesive mat with a ventilation layer) can be used as the drain mat 9, thereby allowing drainage of waterproof free water.

  FIG. 2 shows the case of exposure waterproofing, and the strainer 14 has an insertion fixing leg 14a as a sandwiching type strainer.

  In both the first embodiment of FIG. 1 and the second embodiment of FIG. 2, the flange 3 of the urethane drain cover member 1 and the urethane waterproof material 8 require a certain amount of overlap for waterproofing. Extend to the level difference accordingly.

It is a vertical side view which shows 1st Embodiment of the waterproof structure of the drain of this invention. It is a vertical side view which shows 2nd Embodiment of the waterproof structure of the drain of this invention. It is a perspective view of the urethane drain cover member 1 used by this invention. It is a vertical side view which shows a prior art example. It is (a) top view which shows a prior art example, (b) AA 'sectional drawing.

DESCRIPTION OF SYMBOLS 1 Urethane drain cover member 2 Drain cylinder 3 Flange 4 Waterproof retainer concrete 5 Heat insulating material 6 Asphalt waterproof 7 Urethane resin 8 Urethane waterproof material 9 Drain mat 10 Drain cover 11 Flexible hose 11a Opening edge part 12 Flange-shaped sheet 12a Opening edge part 12b Opening 13 Joint 14 Strainer 14a Insertion fixing leg 15 Strainer slip prevention 16 Mortar 17 Frame concrete (underground)
20 Polyurethane-based waterproofing layer 30 Existing drain 40 Anchor bolt 50 Drain pipe 60 Base

In order to achieve the above object, the present invention according to claim 1 is formed by integrally molding a drainage cylinder portion and a flange having an end portion of the drainage cylinder extending at a right angle or close to the outside with urethane resin. Use a urethane drain cover member, insert the drain cylinder of the urethane drain cover member into the drain pipe in the existing drain down below the joint between the existing drain and the trough, and insert the urethane with urethane resin on the existing drain The gist is to adhere the flange of the drain cover member and to press the upper side of the flange with a urethane waterproof material.

Claims (4)

  Using a urethane drain cover member formed integrally with a drain cylinder body and a flange having an end portion of the drain cylinder extending at a right angle or close to the outside with urethane resin, and draining the urethane drain cover member A drainage waterproof structure characterized in that a cylinder is inserted into a drain pipe in an existing drain, the flange of the urethane drain cover member is bonded to the existing drain with urethane resin, and the upper side of the flange is pressed with a urethane waterproof material. .   The drain waterproof structure according to claim 1, wherein the urethane waterproof material is a molded urethane sheet, and an end of the urethane waterproof material is superimposed on a flange of the urethane drain cover member.   The drain waterproof structure according to claim 1, wherein the urethane waterproof material is a sprayed urethane waterproof material.   4. The drain waterproof structure according to claim 1, wherein a drainage mat is laid under the flange of the urethane drain cover member, and an end of the drainage mat is connected to a gap between the existing drainage pipe and the drainage cylinder.

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