JP2009024488A - Waterproof structure around drain - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof structure around a drain capable of firmly joining a backing and a drain member and installable easily. <P>SOLUTION: This waterproof structure around a drain comprises a sheet metal 10 having a through hole 10a corresponding to the drain 3 and having one surface coated with a fusing layer 15 and a rubber drain member 11 having a tubular part 11a and a joining part 11b extending from the tubular part 11a. The sheet metal 10 is secured to the outer surface of a building structure in which the drain 3 is formed. The tubular part 11a of the drain member 11 is inserted into the drain 3 through the through-hole 10a of the sheet metal 10. The joined part 11b of the drain member 11 is thermally fused to the sheet metal 10 through the fusing layer 15. A rubber waterproof sheet 12 is joined to the surface of the joined part 11b of the drain member 11 on the opposite side of the sheet metal 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a waterproof structure around a drain for covering the periphery of a drain formed on a rooftop of a building structure with a waterproof sheet.

  On the roof of a building structure such as a building, a waterproof treatment is generally performed by covering a base made of concrete or the like with a waterproof sheet. By the way, the drainage for draining the water accumulated on the roof is usually provided on the base of the roof, and the drain inlet is chamfered in a tapered shape so that the surrounding water can easily flow. ing. When covering the periphery of such a drain with a waterproof sheet, it has been necessary to devise so that water does not enter between the base and the waterproof sheet.

  Conventionally, a method of adhering and fixing a waterproof sheet to the tapered chamfered portion of the drain via a sealing material has been employed. However, the waterproof sheet may cause poor adhesion due to unevenness of the base, and water leaks between the waterproof sheet and the base, requiring skill in the work.

  Therefore, a waterproof structure using a drain material made of a soft material such as a rubber material or a resin material having a cylindrical portion inserted into the drain and a flange portion extending from the cylindrical portion along the surface of the base has been proposed. (For example, see Patent Documents 1 and 2). In this waterproof structure, the collar portion is fixed to the base with the cylindrical portion of the drain material being inserted into the drain, and a waterproof sheet provided with a hole corresponding to the drain is joined to the surface of the collar portion. . According to this structure, the diameter of the hole provided in the waterproof sheet can be made larger than the inner diameter of the drain within a range in which the waterproof sheet can be joined to the surface of the buttock of the drain material. Even if it deviates slightly, water leakage does not occur. Therefore, even a relatively unskilled worker can perform waterproofing around the drain well. In addition, since the drain material has the cylindrical portion inserted into the drain, the cylindrical portion also has an effect that water on the waterproof sheet can be smoothly discharged to the drain.

Japanese Utility Model Publication No. 6-73221 JP 2001-193228 A

  However, in practice, the shape of the inlet of the drain provided on the base varies, and the size and angle of chamfering are not constant. Therefore, if chamfering is large, fill the chamfered portion with an injection material such as resin mortar to flatten the base, and then install the sealing material, and then place the draining material on top of it to attach the draining material to the adhesive, etc. Fixing with is done. However, the work of filling the chamfered portion with an injection material requires a certain level of skill, and if the injection amount of the injection material is insufficient and the flatness of the base is low, the drain material and the base are not bonded properly. It will be enough. In that case, there is a possibility that the drain material may be peeled off together with the waterproof sheet due to the generation of a negative pressure due to a strong wind or the like at the time of the typhoon or the blowing in the drain. In addition, when a rooftop that has deteriorated over time is repaired, the undulations of the base are also large, and therefore, particularly insufficient bonding between the base and the drain material is likely to occur.

  An object of the present invention is to provide a waterproof structure around a drain that can firmly bond a base and a drain material and can be easily installed.

Means for Solving the Problems and Effects of the Invention

The waterproof structure around the drain of the first invention is a waterproof structure around the drain for covering the drain formed on the outer surface of the building structure with a rubber waterproof sheet,
A metal plate that has a through-hole corresponding to the drain and is fixed to the outer surface of the building structure in which one surface is covered with a first fusion layer and the drain is formed on the other surface; A rubber drain material having a cylindrical portion inserted into the drain through a through-hole, and a joint portion protruding from the cylindrical portion and thermally fused to the metal plate via the first fusion layer; The waterproof sheet is joined to the surface of the drain material joining portion opposite to the metal plate.

  In this waterproof structure around the drain, the drain material joining portion is connected to the metal plate via the first fusion layer covering one surface of the metal plate in a state where the cylinder portion of the drain material is inserted into the drain. It is heat-sealed. The drain plate is firmly joined to the base by fixing the metal plate to the base on the other surface. Furthermore, the periphery of the drain is covered with the waterproof sheet by bonding the waterproof sheet to the joint portion of the drain material. According to this structure, since the drain material is firmly joined to the base via the metal plate fixed to the base by screws, bolts, etc., it is prevented that the drain material is peeled off together with the waterproof sheet by strong winds or the like. The Moreover, the joining part of a metal plate and a drain material can be easily joined by the heat sealing | fusion via a melt | fusion layer, and workability | operativity is also favorable.

  Furthermore, since the metal plate is fixed to the base with screws or the like, unlike the case where the rubber drain material is directly joined to the base, the injection material is injected unless the base is uneven. Thus, the work of flattening the base is unnecessary, and a series of waterproofing work is simplified. Further, even when performing the flattening operation of the base, since a very high flatness is not required, the operation is easy and a skilled technique is unnecessary.

  Here, the joint portion of the drain material and one joint surface of the waterproof sheet are covered with a second fusion layer, and the joint portion and the waterproof sheet are heat-sealed via the second fusion layer. (Second invention). In this case, since the rubber waterproof sheet and the joining portion of the drain material can be easily joined by thermal fusion via the fusion layer, workability on site is good.

  Moreover, as said 1st melt | fusion layer which coat | covers a metal plate, what consists of ethylene ethyl acrylate (EEA) resin can be used (3rd invention).

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view around a drain on a building roof. As shown in FIG. 1, a drainage 3 (drainage hole) for discharging water accumulated on the rooftop is formed on the bottom surface 2 made of concrete on the bottom surface 5 of the rooftop of the building 1 so as to extend downward. Yes. Normally, the upper end portion of the drain 3 is chamfered so that the surrounding water can easily flow into the drain 3, and as shown in FIG. The drain 3 is made of metal, resin, or the like, and is inserted with a pipe 4 having a flange 4a along the tapered shape of the upper end portion of the drain 3.

  Next, a waterproof structure around the drain for covering the drain 3 with a rubber waterproof sheet 12 will be described. As shown in FIG. 1, the waterproof structure around the drain according to the present embodiment includes a metal plate 10 fixed to the base 2 of the roof bottom surface 5 on which the drain 3 is formed, a cylindrical portion 11 a, and a joint portion 11 b. And a rubber drain material 11. And in the state where drain material 11 was joined to the upper surface of metal plate 10 fixed to base 2, further, rubber waterproof sheet 12 covering bottom surface 5 on the roof is joined to this drain material 11, The drain is covered with a waterproof sheet 12 to be waterproof.

  2A is a plan view of the metal plate 10, and FIG. 2B is a cross-sectional view taken along line BB in FIG. As shown in FIGS. 1 and 2, the metal plate 10 is a plate member having a substantially square planar shape. A through hole 10 a having a diameter substantially equal to the inner diameter of the drain 3 (the inner diameter of the pipe 4 inserted into the drain 3) is formed in the central portion of the metal plate 10 corresponding to the drain 3. Further, a plurality of (for example, eight) screw holes 10b through which a plurality of screws 13 (see FIG. 1) are respectively inserted are formed in the outer edge portion of the metal plate 10. And the metal plate 10 is firmly fixed to the base | substrate 2 of the roof bottom face 5 in the lower surface of FIG. 1 by the some screw | thread 13 penetrated by these some screw holes 10b. Instead of the screw 13, other mechanical joining means such as a bolt may be used.

  As this metal plate 10, what consists of various metal materials, such as iron, carbon steel, stainless steel, aluminum, can be used. However, since the metal plate 10 is installed in an environment where water is present, a material having corrosion resistance, for example, a steel plate whose surface is subjected to corrosion resistance treatment such as plating or painting, a stainless steel plate having high corrosion resistance, or It is preferable to be formed of an aluminum plate or the like.

  One surface (the upper surface in FIG. 1) of the metal plate 10 is covered with a fusion layer 15 (first fusion layer) for joining the drain material 11 described below by thermal fusion. The fusion layer 15 is a layer made of a thermoplastic material such as a resin film made of a thermoplastic resin. Examples of the thermoplastic resin that can be used as the fusing layer 15 include ethylene ethyl acrylate (EEA) resin, polyethylene (PE) resin, polypropylene (PP) resin, ethylene vinyl acetate (EVA) resin, and thermoplastic rubber (TPR). Can be suitably used. Furthermore, it is preferable to use a thermoplastic resin having a melting point in the range of 80 to 160 ° C. When the melting point of the thermoplastic resin constituting the fusing layer 15 is within the above range, the fusing layer 15 does not soften even when the temperature becomes high such as in summer, and on the other hand, a general heating means such as hot air is used. Since the fusion layer 15 can be sufficiently melted, occurrence of poor fusion can be prevented.

  The drain material 11 includes a cylindrical portion 11a inserted into the drain 3, and a joint portion 11b projecting outward from one end of the cylindrical portion 11a (a radial direction perpendicular to the axial direction of the cylindrical portion 11a). The tube portion 11a and the joint portion 11b are integrally formed of a rubber material.

  The cylindrical portion 11 a has an outer diameter that is substantially equal to the inner diameter of the pipe 4 in the drain 3. And by inserting this cylinder part 11a in the drain 3, the water on the waterproof sheet 12 is discharged | emitted smoothly to the drain 3 via the cylinder part 11a.

  The joining portion 11b projects in an annular shape from the end of the cylindrical portion 11a, and the lower surface of the joining portion 11b in FIG. 1 is joined to the upper surface of the metal plate 10 by thermal fusion via the fusion layer 15. Further, the upper surface (surface opposite to the metal plate 10: the surface bonded to the waterproof sheet 12) of the bonding portion 11 b in FIG. 1 is covered with a bonding layer 16 (second bonding layer) made of a thermoplastic resin film. The upper surface of the joining portion 11b and the rubber waterproof sheet 12 are joined by thermal fusion via the fusion layer 16. As the fusion layer 16, for example, ethylene ethyl acrylate (EEA) resin, polyethylene (PE) resin, polypropylene (PP) resin, ethylene vinyl acetate (EVA) resin, and thermoplastic rubber (TPR) can be suitably used. .

  Further, for the same reason as the fusion layer 15 (first fusion layer), it is preferable to use a thermoplastic resin having a melting point in the range of 80 to 160 ° C. for the fusion layer 16. Furthermore, the thickness of the fusion layer 16 is preferably in the range of 30 to 300 μm. When the thickness of the fusion layer 16 is within the above range, the molten resin can enter even if there is a pattern such as a canvas pattern on the surface of the waterproof sheet 12, and sufficient fusion strength can be obtained. Moreover, when the thickness of the fusion | melting layer 15 is too large, it will become easy to generate | occur | produce the curvature by the difference in the thermal expansion coefficient with the waterproof sheet 12, but generation | occurrence | production of curvature can be suppressed by making thickness into the said range.

  The waterproof sheet 12 that covers the base 2 of the rooftop bottom surface 5 is a water-resistant sheet made of vulcanized rubber, and a hole for pouring water accumulated on the waterproof sheet 12 into the drain 3 is provided in the waterproof sheet 12. 12a is formed. However, it is not particularly necessary to accurately form the hole 12a so that the hole diameter is substantially the same as the inner diameter of the drain 3. That is, the diameter of the hole 12a is made sufficiently larger than the inner diameter of the drain 3 so long as the peripheral portion of the hole 12a of the waterproof sheet 12 is within a range that can be joined to the upper surface of the drain material 11 so as to surround the drain 3. However, the water on the waterproof sheet 12 does not leak between the waterproof sheet 12 and the base 2. Therefore, the hole processing to the waterproof sheet 12 becomes easy. In addition, as the waterproof sheet 12, what consists of ethylene propylene rubber, butyl rubber, etc. can be used.

  Next, a waterproof process around the drain using the metal plate 10 and the drain material 11 described above will be described.

  First, after passing through the cylindrical portion 11 a of the drain material 11 through the through hole 10 a of the metal plate 10, the lower surface of the joint portion 11 b of the drain material 11 is attached to the upper surface of the metal plate 10 covered with the fusion layer 15. The metal plate 10 and the drain material 11 are integrated with each other by thermal fusion.

  Next, the cylindrical portion 11 a of the drain material 11 is inserted into the drain 3 and the metal plate 10 is installed on the base 2. Then, the screws 13 are inserted into the screw holes 10 b of the metal plate 10, and the metal plate 10 is fixed to the base 2 with a plurality of screws 13. Thereby, the drain material 11 can be firmly fixed to the base 2 via the metal plate 10. In addition, as in the conventional method, an injection material such as resin mortar is injected into the tapered portion of the drain 3 (upper surface of the flange 4a of the pipe 4) and the uneven portion of the deteriorated base 2 surface, The operation of flattening the base 2 is basically unnecessary. In addition, when the chamfered portion of the drain 3 is considerably large, or when the base 2 is deteriorated so much that the unevenness is large, the base 2 may be flattened to stabilize the posture of the metal plate 10. Even in cases, high flatness is not necessary.

  Note that the above-described joining of the metal plate 10 and the drain material 11 and the fixing of the metal plate 10 to the base 2 may be reversed, and the metal plate 10 is fixed to the base 2 before the metal. The drain material 11 may be joined to the plate 10 by heat fusion.

  Finally, after forming a hole 12 a in the waterproof sheet 12, the waterproof sheet 12 is stacked on the upper surface of the joint portion 11 b of the drain material 11, and the peripheral portion of the hole 12 a of the waterproof sheet 12 is thermally fused via the fusion layer 16. Join by wearing. Thereby, the periphery of the drain 3 is covered with the waterproof sheet 12.

  In the waterproof structure around the drain according to the present embodiment, the drain material 11 is joined to the base 2 through the metal plate 10 that can be firmly fixed to the base 2 with screws 13 or the like. Peeling with the waterproof sheet 12 is prevented. In addition, since the metal plate 10 is fixed to the base 2 with screws 13 or the like, unlike the case where the rubber drain material 11 is directly bonded to the base 2, the base material 2 is injected by injecting an injection material. The flattening operation can be omitted, and a series of waterproofing processes are simplified. Further, even when the base 2 is flattened, the flatness is not so high, so that the work is easy and no skill is required.

  Further, the metal plate 10 and the joint portion 11 b of the drain material 11 can be easily joined by heat fusion via the fusion layer 15. Furthermore, the rubber waterproof sheet 12 and the joint portion 11 b of the drain material 11 can be easily joined by thermal fusion via the fusion layer 16. Therefore, workability on site is good.

  Various modifications can be made to the above-described embodiment without departing from the spirit of the present invention. In the following description of the modified embodiment, the same reference numerals are given to those having the same configuration as that of the above-described embodiment, and the description thereof is omitted as appropriate.

  For example, in the said embodiment, although the melt | fusion layer 16 (2nd melt | fusion layer) is formed in the upper surface of the junction part 11b of the drain material 11, the back surface (drain material 11) of the part surrounding the hole 12a of the waterproof sheet 12 is formed. The fusion layer 16 may be formed on the bonding surface.

  The rubber waterproof sheet 12 and the joint portion 11b of the rubber drain material 11 may be joined by an adhesive instead of heat fusion by the fusion layer 16.

  Moreover, although the said embodiment is an example which applied this invention with respect to the drain extended below from the bottom face of a rooftop, it is also possible to apply this invention with respect to the drain extended in a horizontal direction. As shown in FIG. 3, a rising portion 30 is often provided on the outer periphery of the roof of a building such as a building. In such a case, the drain 3 may be formed so as to extend in a substantially horizontal direction from the inner side surface 31 of the rising portion 30 to the outside.

  The waterproof structure of the present invention can also be applied to such a horizontally extending drain 3. First, the metal plate 10 whose surface is covered with the fusion layer 15 is fixed to the base 2 at the inner side surface 31 and the bottom surface 5 of the rising portion 30 in a state of being bent at a substantially right angle. Next, after the cylindrical portion 11 a of the drain material 11 is inserted into the drain 3 through the through hole 10 a of the metal plate 10, the joint portion 11 b of the drain material 11 is thermally fused to the surface of the metal plate 10 via the fusion layer 15. Joined by wearing. Further, the waterproof waterproof sheet 12 made of rubber is bonded to the surface of the joint portion 11b by heat fusion or adhesion using an adhesive, so that the drain is covered with the waterproof sheet 12 and waterproofed.

It is sectional drawing of the waterproof structure of the drain periphery on a building roof. It is a figure which shows a metal plate, (a) is a top view of a metal plate, (b) is the BB sectional drawing of (a). It is sectional drawing of the waterproof structure of the drain periphery on the building roof in the case where the drain extended horizontally is provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 3 Drain 10 Metal plate 10a Through-hole 11 Drain material 11a Tube part 11b Joint part 12 Waterproof sheet 15 Fusing layer (1st fusing layer)
16 Fusion layer (second fusion layer)

Claims (3)

A waterproof structure around the drain for covering the periphery of the drain formed on the outer surface of the building structure with a rubber waterproof sheet,
A metal plate having a through-hole corresponding to the drain and one surface of which is covered with a first fusion layer and fixed on the outer surface of the building structure in which the drain is formed on the other surface;
A rubber part having a cylindrical part inserted into the drain through a through hole of the metal plate, and a joint part protruding from the cylindrical part and thermally fused to the metal plate via the first fusion layer. With a drain material of
The waterproof structure around the drain, wherein the waterproof sheet is bonded to a surface of the drain material joining portion opposite to the metal plate. The joining portion of the drain material and one joining surface of the waterproof sheet are covered with a second fusion layer,
The waterproof structure around the drain according to claim 1, wherein the joint portion and the waterproof sheet are heat-sealed via the second fusion layer. The waterproof structure around the drain according to claim 1, wherein the first fusion layer is made of ethylene ethyl acrylate resin.

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