Rainwater drain repair components, rainwater drain repair method, repaired rainwater drain structure, repair drain components, and rainwater drain repair component set

Abstract

To provide a rainwater drain port repair member 1 used for repairing a rainwater drain port by fitting a repair drain member 17 to a rainwater drain port 13 of a roof floor and the like of a building via an adhesive agent 18, without the need for being collected after repair, allowing an adhesion without considering a setting time of the adhesive agent and capable of being fitted flexibly relative to the variation of inside diameters of existing drains.SOLUTION: A rainwater drain port repair member comprises a cylindrical part 2 and a slit 3 provided at a position of 25-90% of an axial direction length of the cylindrical part from one end to the other end of the cylindrical part. The cylindrical part 2 is made of resin or metal, an outside diameter of the cylindrical part 2 is larger than an inside diameter of a cylindrical part 17a of a repair drain member, and the cylindrical part 2 is harder than the cylindrical part of the repair drain member. By fitting the cylindrical part 2 to the cylindrical part of the repair drain member, the cylindrical part of the repair drain member is pressure-welded to a cylindrical part 15a of an existing drain member 15 so that the existing drain member and the repair drain member are adhered.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a stormwater drain repair component, a stormwater drain repair method, a repaired stormwater drain structure, a repair drain member, and a stormwater drain repair component set. More specifically, the present invention relates to a stormwater drain repair component, a repair drain member, and a stormwater drain repair component set used to repair stormwater drains such as existing drains or overflow pipes installed on the roof of a building, a stormwater drain repair method using the same, and a repaired stormwater drain structure repaired using the same. [Background technology]

[0002] When a waterproof sheet is installed on the roof of a building, drains and overflow pipes are installed as outlets for rainwater. Drains and overflow pipes are often equipped with strainer caps to prevent clogging.

[0003] Waterproof sheets deteriorate over time, so they are repaired after several years have passed. At this time, there are two methods: laying a new waterproof sheet for repair on top of the existing one and removing the existing drain and overflow pipes and replacing them with new ones, or inserting repair parts such as a flange and drain pipe combination from above and joining them to the existing drain or overflow pipe with sealing or other methods without removing them.

[0004] When inserting the renovation part from above, in order to reduce the reduction in drainage performance caused by reducing the inner diameter of the drain outlet, the renovation part is structured so as to have only the flange part without a drain pipe, and the renovation part is glued from the inner surface of the drain pipe of the existing drain or overflow pipe to the flange part.

[0005] In order to adhere a repair component to the inner surface of an existing drain or overflow pipe, there is a method in which adhesive is applied to the inner surface of the drain pipe, the repair component is inserted, and a special expansion tool is used to continuously press the repair component against the inner surface of the drain pipe, and after the adhesive has hardened, the expansion tool is removed (Patent Document 1). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 8-93153 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the method of Patent Document 1 requires the worker to prepare an expansion jig, which incurs the cost of purchasing the expansion jig. Furthermore, because the expansion jig must be finally retrieved, the work cannot be completed until the adhesive hardens, which increases the construction time. Furthermore, the time it takes for the adhesive to harden is affected by the work environment, such as temperature. If the pressure is not applied for a sufficient period of time, the adhesive strength will be insufficient, and if it is applied for an excessive period of time, the construction time will be longer than necessary.

[0008] Therefore, the inventor invented a repair component that can achieve adhesion without the need to retrieve the expansion tool and without considering the curing time of the adhesive, and the applicant filed a patent application for the invention (Patent Application No. 2020-183609). One of the inventions described in Patent Application No. 2020-183609 is a renovation member that is fitted into a renovation drain member to press the renovation drain member against the existing drain member and bond the existing drain member and renovation drain member together, and has a cylindrical portion and a flange portion, with the cylindrical portion covered with an elastic material. Another invention described in Patent Application No. 2020-183609 is a renovation member that is fitted into a renovation drain member to press the renovation drain member against the existing drain member and bond the existing drain member and renovation drain member together, and has a cylindrical portion and a flange portion, with the cylindrical portion being tapered.

[0009] However, the former repair component, in which the cylindrical portion is covered with an elastic body, is designed to be pressed with the elastic body, but the thickness of the elastic body narrows the drainage channel, reducing the amount of drainage. Also, during production, there is a process of gluing the elastic body, which increases costs. The latter repair member, which has a tapered cylindrical section, is crimped only at the taper, but it cannot accommodate variations in the inner diameter of existing drains. Also, the dimensions are very strict. Furthermore, both the former and latter repair members have flanges, which limit the insertion allowance and require precise dimensions. The present invention provides a repair component that solves these problems. [Means for solving the problem]

[0010] The first invention relates to an existing sheet waterproofing structure in which an existing waterproof sheet is laid on the surface of a building roof, veranda or balcony, excluding the rainwater drain outlet, and an existing drain member having a first tubular portion and a first flange portion protruding from the outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet, and the method comprises preparing a repair drain member having a second tubular portion and a second flange portion protruding from the outer periphery of one end of the second tubular portion, applying adhesive to the inner circumferential surface of the first tubular portion of the existing drain member or the outer circumferential surface of the second tubular portion of the repair drain member, and fitting the second tubular portion of the repair drain member into the first tubular portion of the existing drain member, The rainwater drain outlet repair member has a third cylindrical portion and a slit provided from one end of the third cylindrical portion toward the other end to a position that is 25 to 90% of the axial length of the third cylindrical portion, the third cylindrical portion being made of resin or metal, the outer diameter of the third cylindrical portion being larger than the inner diameter of the second cylindrical portion of the repair drain member, and the third cylindrical portion being harder than the second cylindrical portion of the repair drain member, The third cylindrical portion of the rainwater drain outlet renovation member is fitted into the second cylindrical portion of the renovation drain member from the end with the slit, thereby pressing the second cylindrical portion of the renovation drain member against the first cylindrical portion of the existing drain member, thereby bonding the existing drain member and the renovation drain member together.

[0011] The second invention of this case is a method for repairing a rainwater drain in an existing sheet waterproofing structure in which an existing waterproof sheet is laid on the surface of a building roof, veranda or balcony, excluding the rainwater drain outlet, and an existing drain member having a first tubular portion and a first flange portion protruding from the outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet, the method comprising: preparing a repair drain member having a second tubular portion and a second flange portion protruding from the outer periphery of one end of the second tubular portion; applying adhesive to the inner circumferential surface of the first tubular portion of the existing drain member or the outer circumferential surface of the second tubular portion of the repair drain member; and fitting the second tubular portion of the repair drain member into the first tubular portion of the existing drain member; The rainwater drain outlet repair method includes preparing a rainwater drain outlet repair member having a third cylindrical portion and a slit provided from one end of the third cylindrical portion to a position 25 to 90% of the axial length of the third cylindrical portion, and fitting the third cylindrical portion of the rainwater drain outlet repair member into the second cylindrical portion of the repair drain member from the end where the slit is provided, The third cylindrical portion of the rainwater drain outlet repair member is made of resin or metal, the outer diameter of the third cylindrical portion is larger than the inner diameter of the second cylindrical portion of the repair drain member, and the third cylindrical portion is harder than the second cylindrical portion of the repair drain member; The third cylindrical portion of the rainwater drain outlet renovation member is fitted into the second cylindrical portion of the renovation drain member, thereby pressing the second cylindrical portion of the renovation drain member against the first cylindrical portion of the existing drain member, thereby bonding the existing drain member and the renovation drain member together.

[0012] The third invention of this case is a repaired rainwater drain structure in which an existing waterproof sheet is laid on the surface of the roof, veranda or balcony of a building, except for the rainwater drain outlet, and an existing drain member having a first cylindrical portion and a first flange portion protruding from the outer periphery of one end of the first cylindrical portion is provided at the rainwater drain outlet, and a second cylindrical portion of a repaired drain member having a second cylindrical portion and a second flange portion protruding from the outer periphery of one end of the second cylindrical portion is fitted into the first cylindrical portion of the existing drain member, and the inner peripheral surface of the first cylindrical portion of the existing drain member and the outer peripheral surface of the second cylindrical portion of the repaired drain member are joined via an adhesive, The renovated stormwater drain structure includes a stormwater drain renovation member fitted into the second tubular portion of the renovated drain member, and the stormwater drain renovation member has a third tubular portion and a slit extending from one end of the third tubular portion toward the other end to a position 25 to 90% of the axial length of the third tubular portion, the third tubular portion being made of resin or metal, the outer diameter of the third tubular portion being larger than the inner diameter of the second tubular portion of the renovated drain member, and the third tubular portion being harder than the second tubular portion of the renovated drain member, and the stormwater drain renovation member functions to press the second tubular portion of the renovated drain member against the first tubular portion of the existing drain member.

[0013] The fourth invention relates to an existing sheet waterproofing structure in which an existing waterproof sheet is laid on the surface of a building roof, veranda or balcony except for the rainwater drain outlet, and an existing drain member having a first tubular portion and a first flange portion protruding from the outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet, and a repair drain member having a second tubular portion and a second flange portion protruding from the outer periphery of one end of the second tubular portion is prepared, adhesive is applied to the inner circumferential surface of the first tubular portion of the existing drain member or the outer circumferential surface of the second tubular portion of the repair drain member, the second tubular portion of the repair drain member is fitted into the first tubular portion of the existing drain member, and further a third tubular portion made of resin or metal is attached to the third tubular portion. a stormwater drain outlet repair component having a third cylindrical portion and a slit provided from one end of the third cylindrical portion to a position 25 to 90% of the axial length of the third cylindrical portion, wherein the outer diameter of the third cylindrical portion is larger than the inner diameter of the end opposite to the end having the second flange portion of the second cylindrical portion of the repair drain member, and the third cylindrical portion is harder than the second cylindrical portion of the repair drain member; the stormwater drain outlet repair component is fitted into the second cylindrical portion of the repair drain member from the end where the slit is provided in the third cylindrical portion, thereby pressing the second cylindrical portion of the repair drain member against the first cylindrical portion of the existing drain member and bonding the existing drain member and the repair drain member together; The second cylindrical portion is characterized in that the inner diameter thereof tapers from the end having the second flange portion to the other end.

[0014] The fifth invention of the present invention is a set of rainwater drainage outlet repair components including the rainwater drainage outlet repair component of the first invention of the present invention and the repair drain component of the fourth invention of the present invention.

[0015] The present invention includes the following embodiments. [1] In an existing sheet waterproofing structure in which an existing waterproof sheet is laid on the surface of the roof, veranda or balcony of a building, excluding the rainwater drain outlet, and an existing drain member having a first tubular portion and a first flange portion protruding from the outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet, a rainwater drain outlet repair member is provided, which has a second tubular portion and a second flange portion protruding from the outer periphery of one end of the second tubular portion, and an adhesive is applied to the inner surface of the first tubular portion of the existing drain member or the outer periphery of the second tubular portion of the repair drain member, and the second tubular portion of the repair drain member is fitted into the first tubular portion of the existing drain member, The rainwater drain outlet repair member has a third cylindrical portion and a slit provided from one end of the third cylindrical portion toward the other end to a position that is 25 to 90% of the axial length of the third cylindrical portion, the third cylindrical portion being made of resin or metal, the outer diameter of the third cylindrical portion being larger than the inner diameter of the second cylindrical portion of the repair drain member, and the third cylindrical portion being harder than the second cylindrical portion of the repair drain member, A rainwater drain outlet renovation component in which the third cylindrical portion of the rainwater drain outlet renovation component is fitted into the second cylindrical portion of the renovation drain component from the end with the slit, thereby pressing the second cylindrical portion of the renovation drain component against the first cylindrical portion of the existing drain component and bonding the existing drain component and the renovation drain component together. [2] A rainwater drain repair component according to [1], wherein the third cylindrical portion of the rainwater drain repair component has at least two slits. [3] A rainwater drainage outlet renovation component as described in [2], in which the slits are arranged symmetrically with respect to the central axis of the third cylindrical portion. [4] The rainwater drainage outlet repair member according to any one of [1] to [3], wherein the slit is provided parallel to the central axis of the third cylindrical portion. [5] A rainwater drainage outlet repair member according to any one of [1] to [4], wherein the width of the slit is 1 to 10 mm. [6] The rainwater drainage outlet repair member according to any one of [1] to [5], wherein the third cylindrical portion is made of polyvinyl chloride resin, polycarbonate, polypropylene, aluminum or stainless steel. [7] A rainwater drainage outlet repair member according to any one of [1] to [6], wherein the thickness of the third cylindrical portion of the rainwater drainage outlet repair member is 1 to 5 mm. [8] A rainwater drain repair member according to any one of [1] to [7], further comprising a strainer portion for preventing clogging.

[0016] [9] In an existing sheet waterproofing structure in which an existing waterproof sheet is laid on the surface of the roof, veranda or balcony of a building, excluding the rainwater drain outlet, and an existing drain member having a first tubular portion and a first flange portion protruding from the outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet, a method for repairing a rainwater drain outlet is provided by preparing a repair drain member having a second tubular portion and a second flange portion protruding from the outer periphery of one end of the second tubular portion, applying adhesive to the inner surface of the first tubular portion of the existing drain member or the outer periphery of the second tubular portion of the repair drain member, and fitting the second tubular portion of the repair drain member into the first tubular portion of the existing drain member, The rainwater drain outlet repair method includes preparing a rainwater drain outlet repair member having a third cylindrical portion and a slit provided from one end of the third cylindrical portion to a position 25 to 90% of the axial length of the third cylindrical portion, and fitting the third cylindrical portion of the rainwater drain outlet repair member into the second cylindrical portion of the repair drain member from the end where the slit is provided, The third cylindrical portion of the rainwater drain outlet repair member is made of resin or metal, the outer diameter of the third cylindrical portion is larger than the inner diameter of the second cylindrical portion of the repair drain member, and the third cylindrical portion is harder than the second cylindrical portion of the repair drain member; A method for repairing a rainwater drain outlet, in which the third cylindrical portion of a rainwater drain outlet repair member is fitted into the second cylindrical portion of the repair drain member, thereby pressing the second cylindrical portion of the repair drain member against the first cylindrical portion of the existing drain member, and bonding the existing drain member and the repair drain member together.

[10] A method for repairing a rainwater drainage outlet described in [9], wherein the third cylindrical portion of the rainwater drainage outlet repair component has at least two slits, the slits are arranged symmetrically with respect to the central axis of the third cylindrical portion, the slits are arranged parallel to the central axis of the third cylindrical portion, and the width of the slits is 1 to 10 mm.

[11] A method for repairing a rainwater drain outlet described in [9] or

[10] , wherein the outer diameter of the third cylindrical portion of the rainwater drain outlet repair member is 0.1 to 5 mm larger than the inner diameter of the second cylindrical portion of the repair drain member.

[12] A method for renovating a rainwater drain outlet described in any of [9] to

[11] , wherein the length of the third tubular portion of the rainwater drain outlet renovation member is the same as or longer than the length of the second tubular portion of the renovation drain member.

[13] A method for repairing a rainwater drain outlet according to any one of [9] to

[12] , wherein the repair drain member is made of soft polyvinyl chloride resin.

[14] A method for renovating a rainwater drain outlet described in any of [9] to

[13] , wherein the inner diameter of the second cylindrical portion of the renovated drain member tapers from the end having the second flange portion to the other end, and the magnitude of the taper of the inner diameter of the second cylindrical portion is greater than 0 and less than 5 / 100.

[15] A method for renovating a stormwater drain according to any one of [9] to

[14] , wherein the stormwater drain is an inlet of a drain or an overflow pipe.

[16] A method for renovating a rainwater drain outlet described in any of [9] to

[15] , in which a renovation waterproof sheet is laid except for the rainwater drain outlet before applying adhesive to the inner surface of the first cylindrical part of the existing drain member or the outer surface of the second cylindrical part of the renovated drain member.

[0017]

[17] An existing sheet waterproofing structure in which an existing waterproof sheet is laid on the surface of the roof, veranda or balcony of a building, except for the rainwater drain outlet, and an existing drain member having a first tubular portion and a first flange portion protruding from the outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet, in which a second tubular portion of a renovated drain member having a second tubular portion and a second flange portion protruding from the outer periphery of one end of the second tubular portion is fitted into the first tubular portion of the existing drain member, and the inner surface of the first tubular portion of the existing drain member and the outer periphery of the second tubular portion of the renovated drain member are joined via an adhesive, is a renovated rainwater drain outlet structure, The renovated stormwater drain structure includes a stormwater drain renovation member fitted into the second tubular portion of the renovation drain member, the stormwater drain renovation member having a third tubular portion and a slit extending from one end of the third tubular portion toward the other end to a position 25 to 90% of the axial length of the third tubular portion, the third tubular portion being made of resin or metal, the outer diameter of the third tubular portion being larger than the inner diameter of the second tubular portion of the renovation drain member, and the third tubular portion being harder than the second tubular portion of the renovation drain member, and the stormwater drain renovation member functions to press the second tubular portion of the renovation drain member against the first tubular portion of the existing drain member.

[0018]

[18] In an existing sheet waterproofing structure in which an existing waterproof sheet is laid on the surface of the roof, veranda or balcony of a building, excluding the rainwater drain outlet, and an existing drain member having a first tubular portion and a first flange portion protruding from the outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet, a modified drain member having a second tubular portion and a second flange portion protruding from the outer periphery of one end of the second tubular portion is prepared, adhesive is applied to the inner surface of the first tubular portion of the existing drain member or the outer periphery of the second tubular portion of the modified drain member, the second tubular portion of the modified drain member is fitted into the first tubular portion of the existing drain member, and a third tubular portion made of resin or metal is further provided. a stormwater drain outlet repair component having a slit provided from one end to a position that is 25 to 90% of the axial length of the third cylindrical portion, wherein the outer diameter of the third cylindrical portion is larger than the inner diameter of the end opposite to the end having the second flange portion of the second cylindrical portion of the repair drain member, and the third cylindrical portion is harder than the second cylindrical portion of the repair drain member; the stormwater drain outlet repair component is fitted into the second cylindrical portion of the repair drain member from the end where the slit is provided in the third cylindrical portion, thereby pressing the second cylindrical portion of the repair drain member against the first cylindrical portion of the existing drain member and bonding the existing drain member and the repair drain member together; A modified drain member, wherein the inner diameter of the second cylindrical portion tapers from the end having the second flange portion toward the other end.

[19] The modified drain member described in

[18] , wherein the taper of the inner diameter of the second cylindrical portion is greater than 0 and less than 5 / 100.

[0019]

[20] A rainwater drain repair component set including a rainwater drain repair component according to any one of [1] to [8] and a repair drain component according to

[18] or

[19] . [Effects of the Invention]

[0020] According to the present invention, the stormwater drain repair component can be finished in the inserted state, and there is no need to retrieve the stormwater drain repair component after the adhesive has hardened, which shortens the construction period and prevents a shortage of crimping time. Furthermore, the stormwater drain repair component of the present invention can be flexibly fitted to existing drains with variations in the inner diameter. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a front cross-sectional view and a bottom view of a stormwater drainage outlet repair member of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of the improved storm water drain structure of the present invention. [Figure 3] FIG. 3 is a plan view and a cross-sectional view of a stormwater drainage outlet repair member according to another embodiment of the present invention. [Figure 4] FIG. 4 is a plan view and a cross-sectional view of the modified drain member of the present invention. [Figure 5] FIG. 5 is a diagram showing a state in which the rainwater drain outlet repair member is fitted into the repair drain member. DETAILED DESCRIPTION OF THE INVENTION

[0022] The present invention will be described in detail below with reference to the drawings, but the present invention is not limited to those shown in the drawings. FIG. 1 is a front cross-sectional view and a bottom view of a stormwater drainage outlet repair member of the present invention, where FIG. 1(a) is a front cross-sectional view taken along line II, and FIG. 1(b) is a bottom view. FIG. 2 is a cross-sectional view of the improved storm water drain structure of the present invention.

[0023] The rainwater drain outlet repair member 1 of the first invention is a rainwater drain outlet repair member 1 used in a rainwater drain outlet repair method in an existing sheet waterproofing structure in which an existing waterproof sheet 14 is laid on the surface 12 of a building roof, veranda or balcony, excluding the rainwater drain outlet 13, and an existing drain member 15 having a first tubular portion 15a and a first flange portion 15b protruding from the outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet 13, by preparing a repair drain member 17 having a second tubular portion 17a and a second flange portion 17b protruding from the outer periphery of one end of the second tubular portion, applying adhesive 18 to the inner surface of the first tubular portion 15a of the existing drain member or the outer periphery of the second tubular portion 17a of the repair drain member, and fitting the second tubular portion 17a of the repair drain member into the first tubular portion 15a of the existing drain member, The rainwater drain outlet repair member 1 has a third cylindrical portion 2 and a slit 3 provided from one end of the third cylindrical portion toward the other end to a position corresponding to 25 to 90% of the axial length of the third cylindrical portion, the third cylindrical portion 2 being made of resin or metal, the outer diameter D1 of the third cylindrical portion 2 being larger than the inner diameter of the second cylindrical portion 17a of the repair drain member, and the third cylindrical portion 2 being harder than the second cylindrical portion 17a of the repair drain member, The third cylindrical portion 2 of the rainwater drain outlet renovation member is fitted into the second cylindrical portion 17a of the renovation drain member from the end 4 where the slit 3 is provided, thereby pressing the second cylindrical portion 17a of the renovation drain member against the first cylindrical portion 15a of the existing drain member, thereby bonding the existing drain member 15 and the renovation drain member 17 together.

[0024] Although a repair waterproof sheet 16 is laid on the repaired stormwater drainage outlet structure 11 in FIG. 2, the repair waterproof sheet 16 does not necessarily have to be laid.

[0025] The rainwater drainage outlet repair member 1 has a slit 3. By having the slit, it can be flexibly fitted to accommodate variations in the inner diameter of the first cylindrical portion 15a of the existing drain member. The slit 3 is provided from one end of the third cylindrical portion 2 to the other end to a position that is 25 to 90% of the axial length of the third cylindrical portion 2. The slit 3 is preferably provided to a position that is 50 to 90% of the axial length of the third cylindrical portion, and more preferably to a position that is 80 to 90% of the axial length of the third cylindrical portion. By keeping the slit length within the above range, the strength of the rainwater drainage outlet improvement member can be maintained while accommodating a wide range of variations in the inner diameter of the first cylindrical portion 15a of the existing drain member. The width of the slit is preferably 1 to 10 mm, more preferably 1 to 6 mm, and even more preferably 1 to 3 mm. By keeping the width of the slit within the above range, the strength of the rainwater drainage outlet repair member can be maintained while accommodating a wide range of variations in the inner diameter of the first cylindrical portion 15a of the existing drain member.

[0026] The third cylindrical portion 2 of the rainwater drainage outlet repair member 1 preferably has at least two slits, more preferably has 2 to 8 slits, and even more preferably has 3 or 4 slits. The slits 3 are preferably provided symmetrically with respect to the central axis of the third cylindrical portion 2. The slit 3 is preferably provided parallel to the central axis of the third cylindrical portion 2 .

[0027] The third cylindrical portion 2 of the rainwater drainage outlet repair member 1 is made of resin or metal. The resin constituting the third cylindrical portion 2 may be a thermoplastic resin or a thermosetting resin, but is preferably a thermoplastic resin. Examples of the thermoplastic resin constituting the third cylindrical portion 2 include vinyl chloride resin (hard vinyl chloride resin or soft vinyl chloride resin), polycarbonate, polypropylene, etc., but is preferably hard vinyl chloride resin. Examples of metals that can be used to form the third cylindrical portion 2 include aluminum and stainless steel, with aluminum being preferred.

[0028] The cross section perpendicular to the axial direction of the third cylindrical portion 2 of the rainwater drainage outlet repair member 1 preferably has a circular shape. The outer diameter of the third cylindrical portion 2 of the rainwater drainage outlet repair member 1 is not limited, but is preferably 69 to 77 mm, more preferably 69 to 76 mm, and even more preferably 69 to 75 mm.

[0029] The axial length L1 of the third cylindrical portion 2 of the rainwater drainage outlet repair member 1 is not limited, but is preferably 20 to 50 mm, more preferably 25 to 40 mm, and even more preferably 30 to 35 mm.

[0030] The thickness of the third cylindrical portion 2 of the rainwater drainage outlet repair member 1 is not limited, but is preferably 1 to 3 mm, more preferably 1.5 to 2.5 mm, and even more preferably 1.8 to 2.2 mm.

[0031] The rainwater drainage outlet repair member 1 may further have a third flange portion protruding from the outer periphery of one end of the third cylindrical portion 2, but it is preferable that it does not have a third flange portion. The presence of a flange limits the insertion allowance and requires that the dimensions be exact. The absence of a flange allows the stormwater drain outlet repair component 1 to be fitted deep into the second cylindrical portion of the repair drain component. If the second cylindrical portion of the repair drain component is tapered, the deeper it is fitted, the stronger the taper of the second cylindrical portion of the repair drain component becomes, and even if the inner diameter of the first cylindrical portion of the existing drain component varies widely, the second cylindrical portion of the repair drain component can be pressed against the first cylindrical portion of the existing drain component.

[0032] The outer diameter of the third cylindrical portion 2 of the stormwater drainage outlet repair member 1 may be tapered from the end without the slits to the end with the slits, but does not have to be tapered. When the stormwater drainage outlet repair member is manufactured by injection molding, it is preferable that the third cylindrical portion 2 be tapered. If the outer diameter of the third cylindrical portion 2 of the rainwater drainage outlet repair member 1 is tapered, the magnitude of the taper is preferably more than 0 and not more than 5 / 100, more preferably 1 / 100 to 4 / 100, and even more preferably 1 / 100 to 2 / 100. The magnitude of the taper of the outer diameter of the third cylindrical portion 2 refers to the difference between the outer diameter of the end 5 where no slit is provided and the outer diameter of the end 4 where the slit is provided, divided by the axial length L1 of the third cylindrical portion 2.

[0033] The rainwater drainage outlet repair component may further have a strainer portion to prevent clogging. FIG. 3 is a plan view and a cross-sectional view of another embodiment of the stormwater drainage outlet repair member of the present invention, where FIG. 3(a) is a plan view and FIG. 3(b) is a cross-sectional view taken along line II-II. The stormwater drainage outlet repair component 1' in Figure 3 has a strainer portion 6 to prevent clogging. The stormwater drainage outlet repair component 1' in Figure 3 is the same as the stormwater drainage outlet repair component 1 in Figure 1, except that it has a strainer portion 6 to prevent clogging. The shape of the strainer portion 6 is not limited as long as it has a clogging prevention function. The strainer portion 6 may be attached to the third cylindrical portion 2 either permanently or removably. The material constituting the strainer portion 6 is not limited, but is preferably a resin or a metal. Examples of resins include hard vinyl chloride resin, polycarbonate, polypropylene, etc., with hard vinyl chloride resin being preferred. Examples of metals include aluminum and stainless steel, with aluminum being preferred. The material constituting the strainer portion 6 may be the same as or different from the material constituting the third cylindrical portion 2. Preferably, the strainer portion 6 is integrally formed with the third cylindrical portion 2 as shown in FIG. By providing a strainer function to the rainwater drainage outlet repair component, it can be used as a replacement for existing strainer caps, eliminating the costs of the special extension tool required for the method of Patent Document 1.

[0034] There are no particular limitations on the method for manufacturing the stormwater drainage outlet repair member, but the stormwater drainage outlet repair member can be manufactured by injection molding the material that constitutes the stormwater drainage outlet repair member. When the rainwater drainage outlet repair component has a strainer portion, the third cylindrical portion and the strainer portion may be manufactured separately or may be integrally molded.

[0035] The rainwater drain outlet repair method of the second invention is a rainwater drain outlet repair method in an existing sheet waterproofing structure in which an existing waterproof sheet 14 is laid on the surface 12 of a building roof, veranda or balcony, excluding the rainwater drain outlet 13, and an existing drain member 15 having a first tubular portion 15a and a first flange portion 15b protruding from the outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet 13, the method comprising: preparing a repair drain member 17 having a second tubular portion 17a and a second flange portion 17b protruding from the outer periphery of one end of the second tubular portion; applying adhesive 18 to the inner surface of the first tubular portion 15a of the existing drain member 15 or the outer periphery of the second tubular portion 17a of the repair drain member 17; and fitting the second tubular portion 17a of the repair drain member 17 into the first tubular portion 15a of the existing drain member 15; The rainwater drainage outlet repair method includes preparing a rainwater drainage outlet repair member 1 having a third cylindrical portion 2 and a slit 3 provided from one end of the third cylindrical portion to a position 25 to 90% of the axial length of the third cylindrical portion, and fitting the third cylindrical portion 2 of the rainwater drainage outlet repair member 1 into the second cylindrical portion 17a of the repair drain member 17 from the end 4 where the slit is provided, The third cylindrical portion 2 of the rainwater drain outlet repair member 1 is made of resin or metal, the outer diameter D1 of the third cylindrical portion 2 is larger than the inner diameter of the second cylindrical portion 17a of the repair drain member 17, and the third cylindrical portion 2 is harder than the second cylindrical portion 17a of the repair drain member 17. The third cylindrical portion 2 of the rainwater drain outlet renovation member 1 is fitted into the second cylindrical portion 17a of the renovation drain member 17, thereby pressing the second cylindrical portion 17a of the renovation drain member 17 against the first cylindrical portion 15a of the existing drain member 15, thereby bonding the existing drain member 15 and the renovation drain member 17 together.

[0036] The outer diameter D1 of the third cylindrical portion 2 of the stormwater drain outlet repair member 1 is larger than the inner diameter of the second cylindrical portion 17a of the repair drain member 17. Because the outer diameter D1 of the third cylindrical portion 2 is larger than the inner diameter D of the second cylindrical portion 17a of the repair drain member, when the third cylindrical portion 2 of the stormwater drain outlet repair member is fitted into the second cylindrical portion 17a of the repair drain member, the second cylindrical portion 17a of the repair drain member is pressed against the first cylindrical portion 15a of the existing drain member, and the existing drain member 15 and the repair drain member 17 can be effectively bonded together. If the outer diameter of the third tubular portion 2 of the rainwater drain outlet renovation member 1 tapers from the end without slits to the end with slits, the outer diameter of the end without slits of the third tubular portion 2 (i.e., the maximum outer diameter of the third tubular portion 2) must be larger than the inner diameter of the second tubular portion 17a of the renovation drain member 17. In addition, when the inner diameter of the second cylindrical portion 17a of the repair drain member 17 is tapered from the end having the second flange portion to the other end, the outer diameter D1 of the third cylindrical portion 2 of the rainwater drain outlet repair member 1 is the inner diameter D of the end 17d opposite to the end having the second flange portion of the second cylindrical portion 17a of the repair drain member 17. 17D (i.e., the minimum value of the inner diameter of the second cylindrical portion 17a). In addition, when the outer diameter of the third cylindrical portion 2 of the rainwater drain outlet repair member 1 is tapered from the end where the slit is not provided to the end where the slit is provided, and the inner diameter of the second cylindrical portion 17a of the repair drain member 17 is tapered from the end where the second flange portion is provided to the other end, the outer diameter of the end where the slit is not provided of the third cylindrical portion 2 (i.e., the maximum value of the outer diameter of the third cylindrical portion 2) is smaller than the inner diameter D of the end 17d opposite to the end where the second flange portion of the second cylindrical portion 17a of the repair drain member 17 is provided. 17D (i.e., the minimum value of the inner diameter of the second cylindrical portion 17a). In other words, the maximum value of the outer diameter of the third cylindrical portion 2 of the rainwater drainage outlet repair member 1 needs to be larger than the minimum value of the inner diameter of the second cylindrical portion 17a of the repair drain member 17.

[0037] The difference between the outer diameter D1 of the third cylindrical portion 2 of the rainwater drain outlet renovation member 1 and the inner diameter of the second cylindrical portion 17a of the renovation drain member 17 is not limited as long as, when the third cylindrical portion 2 of the rainwater drain outlet renovation member is fitted into the second cylindrical portion 17a of the renovation drain member, the second cylindrical portion 17a of the renovation drain member can be pressed against the first cylindrical portion 15a of the existing drain member, and the existing drain member 15 and the renovation drain member 17 can be bonded together; however, the outer diameter D1 of the third cylindrical portion 2 of the rainwater drain outlet renovation member 1 is preferably 0.1 to 5 mm larger than the inner diameter of the second cylindrical portion 17a of the renovation drain member 17, more preferably 0.5 to 4 mm larger, and even more preferably 1 to 3 mm larger. When the inner diameter of the second cylindrical portion 17a of the repair drain member 17 is tapered from the end having the second flange portion to the other end, the outer diameter D1 of the third cylindrical portion 2 of the rainwater drain outlet repair member 1 is the inner diameter D of the end opposite to the end having the second flange portion of the second cylindrical portion 17a of the repair drain member 17. 17D It is preferably 1 to 5 mm larger, more preferably 1 to 3 mm larger, and even more preferably 1.3 to 2.5 mm larger than the above.

[0038] The third cylindrical portion 2 of the stormwater drain outlet renovation member is harder than the second cylindrical portion 17a of the renovation drain member. Because the third cylindrical portion 2 of the stormwater drain outlet renovation member is harder than the second cylindrical portion 17a of the renovation drain member, when the third cylindrical portion 2 of the stormwater drain outlet renovation member is fitted into the second cylindrical portion 17a of the renovation drain member, the second cylindrical portion 17a of the renovation drain member is pressed against the first cylindrical portion 15a of the existing drain member, effectively bonding the existing drain member 15 and the renovation drain member 17. The hardness of the third cylindrical portion 2 and the second cylindrical portion 17a of the renovation drain member is measured using a durometer. A preferred combination of the material constituting the third cylindrical portion 2 and the material constituting the second cylindrical portion 17a of the repair drain member is that the third cylindrical portion 2 is made of hard polyvinyl chloride resin and the second cylindrical portion 17a of the repair drain member is made of soft polyvinyl chloride resin.

[0039] The length L1 of the third cylindrical portion 2 of the rainwater drain outlet repair member 1 is equal to the length L of the second cylindrical portion 17a of the repair drain member 17. 17 or the length L of the second cylindrical portion 17a 17 It is preferable that the length L1 of the third cylindrical portion 2 of the rainwater drain outlet repair member 1 is longer than the length L of the second cylindrical portion 17a of the repair drain member 17. 17 or the length L of the second cylindrical portion 17a 17 By making the length longer than the above, the area over which the second cylindrical portion 17a of the modified drain member 17 is pressed against the first cylindrical portion 15a of the existing drain member can be maximized, thereby providing more reliable waterproofing. The length L1 of the third cylindrical portion 2 of the rainwater drain outlet repair member 1 is equal to the length L of the second cylindrical portion 17a of the repair drain member 17. 17 It is preferably 0 to 15 mm longer, more preferably 0 to 10 mm longer, and even more preferably 1 to 5 mm longer than the above.

[0040] A known existing drain member can be used as the existing drain member 15. The existing drain member 15 has a first cylindrical portion 15a and a first flange portion 15b protruding from the outer periphery of one end of the first cylindrical portion. The material constituting the first cylindrical portion 15a and the first flange portion 15b is not limited, but examples thereof include hard vinyl chloride resin, soft vinyl chloride resin, and metal, with soft vinyl chloride resin being particularly preferred.

[0041] The inner diameter of the first cylindrical portion 15a of the existing drain member 15 is preferably 40 to 78 mm, more preferably 51 to 78 mm, and even more preferably 76 to 78 mm. The outer diameter of the first cylindrical portion 15a of the existing drain member 15 is preferably 48 to 90 mm, more preferably 60 to 90 mm, and even more preferably 89 to 90 mm. The thickness of the first cylindrical portion 15a of the existing drain member 15 is preferably 1 to 6 mm, more preferably 1 to 3 mm, and even more preferably 1 to 2 mm. The outer diameter of the first flange portion 15b of the existing drain member 15 is preferably 140 to 280 mm, more preferably 200 to 250 mm, and even more preferably 220 to 250 mm.

[0042] Before applying adhesive 18 to the inner surface of the first cylindrical portion 15a of the existing drain member 15 or the outer surface of the second cylindrical portion 17a of the renovated drain member 17, it is preferable to lay a renovation waterproof sheet 16 except for the rainwater drain outlet 13.

[0043] The existing waterproof sheet 14 and the repair waterproof sheet 16 can be any known material, including, but not limited to, a soft vinyl chloride resin sheet, a vulcanized rubber sheet, etc. Among these, a soft vinyl chloride resin sheet is preferred.

[0044] An adhesive is applied to the inner peripheral surface of the first cylindrical portion 15a of the existing drain member 15 or the outer peripheral surface of the second cylindrical portion 17a of the modified drain member 17. Examples of adhesives include, but are not limited to, adhesives for PVC pipes and modified silicones, with PVC pipe adhesives being particularly preferred.

[0045] The repair drain member 17 may be a known one, but it is preferable to use the repair drain member of the fourth aspect of the present invention described below.

[0046] The repaired rainwater drain structure 11 of the third invention is an existing sheet waterproofing structure in which an existing waterproof sheet 14 is laid on the surface 12 of the roof, veranda or balcony of a building, except for the rainwater drain outlet 13, and an existing drain member 15 having a first tubular portion 15a and a first flange portion 15b protruding from the outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet 13, and a second tubular portion 17a of a repaired drain member 17 having a second tubular portion 17a and a second flange portion 17b protruding from the outer periphery of one end of the second tubular portion is fitted into the first tubular portion 15a of the existing drain member 15, and the inner surface of the first tubular portion 15a of the existing drain member 15 and the outer periphery of the second tubular portion 17a of the repaired drain member 17 are joined via an adhesive 18, The repaired stormwater drain structure 11 includes a stormwater drain repair member 1 fitted into the second tubular portion 17a of the repaired drain member 17, and the stormwater drain repair member 1 has a third tubular portion 2 and a slit 3 provided from one end of the third tubular portion toward the other end to a position 25 to 90% of the axial length of the third tubular portion, the third tubular portion 2 being made of resin or metal, the outer diameter of the third tubular portion 2 being larger than the inner diameter of the second tubular portion 17a of the repaired drain member 17, the third tubular portion 2 being harder than the second tubular portion 17a of the repaired drain member 17, and the stormwater drain repair member 1 functions to press the second tubular portion 17a of the repaired drain member 17 against the first tubular portion 15a of the existing drain member 15.

[0047] FIG. 2 shows an example of a repaired storm water drain structure 11 of the present invention. In Figure 2, 19 is a drainage pipe. The storm water outlet 13 is preferably the inlet of a drain or overflow pipe. Although the repaired waterproof sheet 16 is laid on the repaired stormwater drainage outlet structure 11 in FIG. 2, the repaired waterproof sheet 16 does not necessarily have to be laid.

[0048] FIG. 4 is a plan view and a cross-sectional view of the improved drain member of the fourth invention, where FIG. 4(a) is a plan view and FIG. 4(b) is a cross-sectional view taken along line III-III. The fourth invention of the present invention relates to an existing sheet waterproofing structure in which an existing waterproof sheet 14 is laid on the surface 12 of a building roof, veranda or balcony, excluding a rainwater drain outlet 13, and an existing drain member 15 having a first cylindrical portion 15a and a first flange portion 15b protruding from the outer periphery of one end of the first cylindrical portion is provided at the rainwater drain outlet 13. In this existing sheet waterproofing structure, a repair drain member 17 having a second cylindrical portion 17a and a second flange portion 17b protruding from the outer periphery of one end of the second cylindrical portion is prepared, and the inner periphery of the first cylindrical portion 15a of the existing drain member 15 is provided. Alternatively, a rainwater drain outlet repair component (1) is provided in which adhesive (18) is applied to the outer peripheral surface of the second cylindrical portion (17a) of the repair drain component (17), the second cylindrical portion (17a) of the repair drain component is fitted into the first cylindrical portion (15a) of the existing drain component, and further, the rainwater drain outlet repair component (1) has a third cylindrical portion (2) made of resin or metal and a slit (3) provided from one end of the third cylindrical portion to a position of 25 to 90% of the axial length of the third cylindrical portion, and the outer diameter (D1) of the third cylindrical portion (2) is equal to or greater than the inner diameter (D) of the end (17d) of the second cylindrical portion (17a) of the repair drain component (17) opposite to the end having the second flange portion. 17D a rainwater drain outlet repair member (17) for use in a rainwater drain outlet repair method, the rainwater drain outlet repair member having a size larger than that of the third cylindrical portion (2) and a third cylindrical portion (2) harder than the second cylindrical portion (17a) of the repair drain member (17) is fitted into the second cylindrical portion (17a) of the repair drain member from the end (4) where the slit (3) of the third cylindrical portion (2) is provided, thereby pressing the second cylindrical portion (17a) of the repair drain member against the first cylindrical portion (15a) of the existing drain member, and bonding the existing drain member (15) and the repair drain member (17), The second cylindrical portion 17a is characterized in that its inner diameter tapers from an end 17c having the second flange portion 17b to the other end 17d.

[0049] The repair drain member 17 has a second cylindrical portion 17a and a second flange portion 17b protruding from the outer periphery of one end of the second cylindrical portion, and the inner diameter of the second cylindrical portion 17a tapers from the end 17c having the second flange portion 17b toward the other end 17d. By tapering the inner diameter of the second tubular portion 17a so that it narrows from the end 17c having the second flange portion 17b toward the other end 17d, the deeper the third tubular portion 2 of the stormwater drain outlet renovation member 1 is fitted into the second tubular portion 17a of the renovation drain member 17, the more strongly the taper of the second tubular portion of the renovation drain member becomes, and even if the inner diameter of the first tubular portion of the existing drain member varies widely, the second tubular portion of the renovation drain member can be pressed against the first tubular portion of the existing drain member. The degree of taper of the inner diameter of the second cylindrical portion 17a of the repair drain member 17 is preferably more than 0 and not more than 5 / 100, more preferably 1 / 100 to 4 / 100, and even more preferably 1 / 100 to 2 / 100. The size of the taper of the inner diameter of the second cylindrical portion 17a is the inner diameter D of the end 17c of the second cylindrical portion 17a on the second flange portion 17b side. 17C and the inner diameter D of the end 17d of the second cylindrical portion 17a opposite to the second flange portion 17b side. 17D The difference between these is the axial length L of the second cylindrical portion 17a. 17 The value obtained by dividing by

[0050] The inner diameter D of the end 17c of the second flange portion 17b side of the second cylindrical portion 17a of the repair drain member 17 17C is preferably 37 to 76 mm, more preferably 47 to 76 mm, and even more preferably 74 to 76 mm. The inner diameter D of the end 17d of the second cylindrical portion 17a of the repair drain member 17 opposite to the second flange portion 17b side 17D is preferably 34 to 75 mm, more preferably 44 to 75 mm, and even more preferably 71 to 75 mm.

[0051] The outer diameter of the second cylindrical portion 17a of the modified drain member 17 is smaller than or the same as the inner diameter of the first cylindrical portion 15a of the existing drain member 15, and is preferably 40 to 79 mm, more preferably 50 to 77 mm, and even more preferably 73 to 74 mm. The thickness of the second cylindrical portion 17a of the repair drain member 17 is preferably 0.5 to 3 mm, more preferably 0.5 to 2 mm, and even more preferably 1 to 2 mm. The outer diameter of the second flange portion 17b of the repair drain member 17 is preferably 140 to 280 mm, more preferably 200 to 250 mm, and even more preferably 220 to 250 mm.

[0052] The materials constituting the second cylindrical portion 17a and the second flange portion 17b of the repair drain member 17 are not limited, but include soft vinyl chloride resin, EPDM, urethane resin, etc., of which soft vinyl chloride resin is preferable. The materials constituting the second cylindrical portion 17a and the second flange portion 17b may be the same or different.

[0053] The method for manufacturing the repaired drain member is not limited, but the repaired drain member can be manufactured by injection molding the material that constitutes the repaired drain member. The second cylindrical portion 17a and the second flange portion 17b may be manufactured separately or may be integrally formed.

[0054] The fifth invention of the present invention is a set of rainwater drainage outlet repair components including the rainwater drainage outlet repair component of the first invention of the present invention and the repair drain component of the fourth invention of the present invention. The outer diameter D1 of the third cylindrical portion 2 of the rainwater drain outlet repair member 1 is equal to the inner diameter D of the end 17d opposite to the end having the second flange portion of the second cylindrical portion 17a of the repair drain member 17. 17D and the third cylindrical portion 2 of the rainwater drain outlet repair member 1 is harder than the second cylindrical portion 17a of the repair drain member 17. The length L1 of the third cylindrical portion 2 of the rainwater drain outlet repair member 1 is preferably equal to or shorter than the length L of the second cylindrical portion 17a of the repair drain member 17. 17or the length L of the second cylindrical portion 17a 17 longer than.

[0055] FIG. 5 shows the state in which the rainwater drain outlet repair member 1 is fitted into the repair drain member 17. FIG. 5(a) shows a state in which the inner diameter of the existing drain member 15 is as expected, and the upper end of the storm water drain outlet repair member 1 and the upper end of the repair drain member 17 are aligned. Figure 5(b) shows a case where the inner diameter of the existing drain member 15 is narrower than expected, and the rainwater drain outlet renovation member 1 does not fit completely into the renovation drain member 17, with part of the rainwater drain outlet renovation member 1 protruding from the renovation drain member 17. FIG. 5(c) shows a state in which the inner diameter of the existing drain member 15 is wider than expected, and the stormwater drain outlet repair member 1 is deeply embedded in the repair drain member 17.

[0056] The rainwater drainage outlet repair member 1 of the present invention has a slit, so that it can be flexibly fitted to existing drain members 15 with variations in inner diameter. Furthermore, by eliminating the flange portion, the rainwater drainage outlet repair member 1 can be fitted deep into the repair drain member 17. Because the second cylindrical portion of the repair drain member 17 is tapered, the deeper the rainwater drain outlet repair member 1 is inserted, the more strongly the taper of the second cylindrical portion of the repair drain member 17 becomes, and even if the variation in the inner diameter of the existing drain member 15 is on the wide side, the repair drain member 17 can be crimped to the existing drain member 15. [Industrial Applicability]

[0057] The rainwater drainage outlet repair member of the present invention can be suitably used for repairing rainwater drainage outlets installed on the roof, veranda or balcony of a building. [Explanation of symbols]

[0058] 1. Rainwater drain repair materials 2. Third cylindrical section 3 slits 4 Slitted edge 5 End without slit 6 Strainer section 11 Repaired stormwater drainage structure 12. Surfaces of building roofs, verandas or balconies 13 Rainwater drain 14 Existing waterproof sheet 15 Existing drain member 15a First cylindrical portion 15b first flange portion 16 Repair waterproof sheet 17 Repair drain material 17a Second cylindrical portion 17b Second flange portion 18 Adhesive 19 Drain pipe

Claims

1. In an existing sheet waterproofing structure in which an existing waterproof sheet is laid on the surface of a building roof, veranda or balcony, excluding the rainwater drain outlet, and an existing drain member having a first tubular portion and a first flange portion protruding from the outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet, a rainwater drain outlet repair member is provided, the rainwater drain outlet repair member being used in a rainwater drain outlet repair method by preparing a repair drain member having a second tubular portion and a second flange portion protruding from the outer periphery of one end of the second tubular portion, applying adhesive to the inner surface of the first tubular portion of the existing drain member or the outer periphery of the second tubular portion of the repair drain member, and fitting the second tubular portion of the repair drain member into the first tubular portion of the existing drain member, The rainwater drain outlet repair member has a third cylindrical portion and a slit provided from one end of the third cylindrical portion toward the other end to a position that is 25 to 90% of the axial length of the third cylindrical portion, the third cylindrical portion being made of resin or metal, the outer diameter of the third cylindrical portion being larger than the inner diameter of the second cylindrical portion of the repair drain member, and the third cylindrical portion being harder than the second cylindrical portion of the repair drain member; A rainwater drain outlet renovation component in which the third cylindrical portion of the rainwater drain outlet renovation component is fitted into the second cylindrical portion of the renovation drain component from the end with the slit, thereby pressing the second cylindrical portion of the renovation drain component against the first cylindrical portion of the existing drain component and bonding the existing drain component and the renovation drain component together.

2. The stormwater drainage outlet repair component according to claim 1 , wherein the third cylindrical portion of the stormwater drainage outlet repair component has at least two slits.

3. 3. The rainwater drainage outlet repair member according to claim 2, wherein the slits are provided symmetrically with respect to the central axis of the third cylindrical portion.

4. The rainwater drainage outlet repair member according to any one of claims 1 to 3, wherein the slit is provided parallel to the central axis of the third cylindrical portion.

5. The rainwater drainage outlet repair member according to any one of claims 1 to 4, wherein the slit width is 1 to 10 mm.

6. The rainwater drainage outlet repair member according to any one of claims 1 to 5, wherein the third cylindrical portion is made of polyvinyl chloride resin, polycarbonate, polypropylene, aluminum or stainless steel.

7. The rainwater drainage outlet repair member according to any one of claims 1 to 6, wherein the thickness of the third cylindrical portion of the rainwater drainage outlet repair member is 1 to 5 mm.

8. The rainwater drainage outlet repair member according to any one of claims 1 to 7, further comprising a strainer portion for preventing clogging.

9. In an existing sheet waterproofing structure in which an existing waterproof sheet is laid on the surface of a building roof, veranda or balcony, excluding the rainwater drain outlet, and an existing drain member having a first cylindrical portion and a first flange portion protruding from the outer periphery of one end of the first cylindrical portion is provided at the rainwater drain outlet, a rainwater drain outlet repair method is provided, which comprises preparing a repair drain member having a second cylindrical portion and a second flange portion protruding from the outer periphery of one end of the second cylindrical portion, applying adhesive to the inner surface of the first cylindrical portion of the existing drain member or the outer periphery of the second cylindrical portion of the repair drain member, and fitting the second cylindrical portion of the repair drain member into the first cylindrical portion of the existing drain member, The rainwater drain outlet repair method includes preparing a rainwater drain outlet repair member having a third cylindrical portion and a slit provided from one end of the third cylindrical portion to a position 25 to 90% of the axial length of the third cylindrical portion, and fitting the third cylindrical portion of the rainwater drain outlet repair member into the second cylindrical portion of the repair drain member from the end provided with the slit, The third cylindrical portion of the rainwater drain outlet repair member is made of resin or metal, the outer diameter of the third cylindrical portion is larger than the inner diameter of the second cylindrical portion of the repair drain member, and the third cylindrical portion is harder than the second cylindrical portion of the repair drain member; A method for repairing a rainwater drain outlet, comprising fitting a third cylindrical portion of a rainwater drain outlet repair member into a second cylindrical portion of a repair drain member, thereby pressing the second cylindrical portion of the repair drain member against the first cylindrical portion of the existing drain member, and bonding the existing drain member and the repair drain member together.

10. The third cylindrical portion of the rainwater drainage outlet repair member has at least two slits, the slits are arranged symmetrically with respect to the central axis of the third cylindrical portion, the slits are arranged parallel to the central axis of the third cylindrical portion, and the width of the slits is 1 to 10 mm. The rainwater drainage outlet repair method according to claim 9.

11. The rainwater drainage outlet repair method according to claim 9 or 10, wherein the outer diameter of the third cylindrical portion of the rainwater drainage outlet repair member is 0.1 to 5 mm larger than the inner diameter of the second cylindrical portion of the repair drain member.

12. The length of the third cylindrical portion of the rainwater drain outlet renovation member is the same as or longer than the length of the second cylindrical portion of the renovation drain member. A rainwater drain outlet renovation method according to any one of claims 9 to 11.

13. The rainwater drain outlet repair method according to any one of claims 9 to 12, wherein the repair drain member is made of soft vinyl chloride resin.

14. The inner diameter of the second cylindrical portion of the repair drain member has a taper that tapers from the end having the second flange portion toward the other end, and the taper of the inner diameter of the second cylindrical portion is greater than 0 and less than 5 / 100. The rainwater drain repair method according to any one of claims 9 to 13.

15. The stormwater drain outlet repair method according to any one of claims 9 to 14, wherein the stormwater drain outlet is an inlet of a drain or overflow pipe.

16. A rainwater drain outlet renovation method according to any one of claims 9 to 15, wherein a renovation waterproof sheet is laid except for the rainwater drain outlet before applying adhesive to the inner surface of the first cylindrical portion of the existing drain member or the outer surface of the second cylindrical portion of the renovation drain member.

17. A repaired rainwater drain structure in which an existing waterproof sheet is laid on the surface of the roof, veranda or balcony of a building, except for the rainwater drain outlet, and an existing drain member having a first cylindrical portion and a first flange portion protruding from the outer periphery of one end of the first cylindrical portion is provided at the rainwater drain outlet, and a second cylindrical portion of a repaired drain member having a second cylindrical portion and a second flange portion protruding from the outer periphery of one end of the second cylindrical portion is fitted into the first cylindrical portion of the existing drain member, and the inner surface of the first cylindrical portion of the existing drain member and the outer periphery of the second cylindrical portion of the repaired drain member are joined via an adhesive, The renovated stormwater drain structure includes a stormwater drain renovation member fitted into the second cylindrical portion of the renovated drain member, the stormwater drain renovation member having a third cylindrical portion and a slit provided from one end of the third cylindrical portion toward the other end to a position that is 25 to 90% of the axial length of the third cylindrical portion, the third cylindrical portion being made of resin or metal, the outer diameter of the third cylindrical portion being larger than the inner diameter of the second cylindrical portion of the renovated drain member, and the third cylindrical portion being harder than the second cylindrical portion of the renovated drain member, and the stormwater drain renovation member functions to press the second cylindrical portion of the renovated drain member against the first cylindrical portion of the existing drain member.

18. A rainwater drainage outlet renovation component set comprising a rainwater drainage outlet renovation component and a renovation drain component according to any one of claims 1 to 8, wherein the renovation drain component has a second cylindrical portion and a second flange portion protruding from the outer periphery of one end of the second cylindrical portion, and the inner diameter of the second cylindrical portion tapers from the end having the second flange portion toward the other end.

19. A set of rainwater drainage outlet renovation components as described in claim 18, wherein the taper of the inner diameter of the second cylindrical portion is greater than 0 and less than 5 / 100.

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