JP7578461B2 - Rainwater drainage outlet repair component, rainwater drainage outlet repair method, and repaired rainwater drainage outlet structure - Google Patents

Description

The present invention relates to a rainwater drain repair component, a rainwater drain repair method, and a repaired rainwater drain structure. More specifically, the present invention relates to a rainwater drain repair component used to repair rainwater drains such as existing drains or overflow pipes installed on the roof of a building, a rainwater drain repair method using the same, and a repaired rainwater drain structure repaired using the same.

When a waterproof sheet is installed on the roof of a building, a drain or overflow pipe is installed to drain rainwater. In addition, drains and overflow pipes are often equipped with strainer caps to prevent clogging.

Waterproof sheets deteriorate over time, so they are repaired after several years have passed. In this case, a new waterproof sheet for repair is laid over the existing one, and the existing drain and overflow pipes are removed and replaced with new ones, or the existing ones are left untouched, and repair parts such as a flange and drainage pipe are inserted from above, and joined to the existing drain or overflow pipe by sealing, etc.

When inserting the repair parts from above, in order to reduce the decrease in drainage performance caused by reducing the inner diameter of the drain outlet, the repair parts are structured with only the flange section without a drain pipe, and the repair parts are glued from the inner surface of the drain pipe of the existing drain or overflow pipe to the flange section.

To bond 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 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 pipe, and the expansion tool is then removed after the adhesive has hardened (Patent Document 1).

Japanese Patent Application Publication No. 8-93153

However, the method of Patent Document 1 requires the worker to prepare an expansion tool, which incurs the cost of purchasing the expansion tool. In addition, since the expansion tool must be finally collected, the work cannot be completed until the adhesive hardens, and the construction period depends on this. Furthermore, since the time it takes for the adhesive to harden depends on the work environment, such as temperature, if the pressure bonding time is insufficient, the adhesiveness will be insufficient, and if it is excessive, it will take more construction time than necessary.
Therefore, an object of the present invention is to provide a repair component that can achieve adhesion without the need to retrieve the expansion tool and without taking into account the curing time of the adhesive.

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 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, the rainwater drain outlet repair member being used in a rainwater drain outlet repair method, which comprises laying a repaired waterproof sheet except for the rainwater drain outlet, preparing a repaired 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 an adhesive to the inner peripheral surface of the first tubular portion of the existing drain member or the outer periphery of the second tubular portion of the repaired drain member, and fitting the second tubular portion of the repaired drain member into the first tubular portion of the existing drain member,
The storm water drain outlet repair component has a third cylindrical portion and a third flange portion protruding from the outer periphery of one end of the third cylindrical portion, the third cylindrical portion being composed of an inner layer made of resin or metal and an outer layer made of foam, rubber or a thermoplastic elastomer, the outer diameter of the inner layer being smaller than the inner diameter of the second cylindrical portion of the repair drain member and the outer diameter of the outer layer being larger than the inner diameter of the second cylindrical portion of the repair drain member, the inner layer of the third cylindrical portion of the storm water drain outlet repair component being harder than the second cylindrical portion of the repair drain member,
The method is characterized in that by fitting the third cylindrical portion of the storm water drain outlet renovation member into the second cylindrical portion of the renovation drain member, the second cylindrical portion of the renovation drain member is pressed against the first cylindrical portion of the existing drain member, thereby bonding the existing drain member and the renovation drain member.

The second 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, the method comprising laying a repaired waterproof sheet except for the rainwater drain outlet, preparing a repaired 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 an 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 repaired drain member, and fitting the second tubular portion of the repaired 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 third flange portion protruding from an outer periphery of one end 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,
the third tubular portion of the storm water drain outlet renovation member comprises an inner layer made of resin or metal and an outer layer made of foam, rubber or thermoplastic elastomer, the outer diameter of the inner layer is smaller than the inner diameter of the second tubular portion of the renovation drain member, the outer diameter of the outer layer is larger than the inner diameter of the second tubular portion of the renovation drain member, the inner layer of the third tubular portion of the storm water drain outlet renovation member is harder than the second tubular portion of the renovation drain member,
The method is characterized in that by fitting the third cylindrical portion of the storm water drain outlet renovation member into the second cylindrical portion of the renovation drain member, the second cylindrical portion of the renovation drain member is pressed against the first cylindrical portion of the existing drain member, thereby bonding the existing drain member and the renovation drain member.

The third invention relates to a repaired rainwater drain 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 repaired waterproof sheet is laid on the existing sheet waterproof structure, except for the rainwater drain outlet, and a second tubular portion of a repaired 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 repaired drain member are joined via an adhesive,
The repaired storm drain structure includes a storm drain repair member fitted into the second tubular portion of the repair drain member, the storm drain repair member having a third tubular portion and a third flange portion protruding from the outer periphery of one end of the third tubular portion, the third tubular portion consisting of an inner layer made of resin or metal and an outer layer made of foam, rubber or thermoplastic elastomer, the outer diameter of the inner layer is smaller than the inner diameter of the second tubular portion of the repair drain member and the outer diameter of the outer layer is larger than the inner diameter of the second tubular portion of the repair drain member, the inner layer of the third tubular portion of the storm drain repair member is harder than the second tubular portion of the repair drain member, and the storm drain repair member functions to press the second tubular portion of the repair drain member against the first tubular portion of the existing drain member.

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, the rainwater drain outlet repair member being used in a rainwater drain outlet repair method, which comprises laying a repaired waterproof sheet except for the rainwater drain outlet, preparing a repaired drain member having a fourth tubular portion and a fourth flange portion protruding from the outer periphery of one end of the fourth tubular portion, applying an adhesive to the inner circumferential surface of the first tubular portion of the existing drain member or the outer circumferential surface of the fourth tubular portion of the repaired drain member, and fitting the fourth tubular portion of the repaired drain member into the first tubular portion of the existing drain member,
The storm water drain outlet repair member has a fifth cylindrical portion and a fifth flange portion protruding from an outer periphery of one end of the fifth cylindrical portion, the fifth cylindrical portion being made of resin or metal, the outer diameter of the fifth cylindrical portion being larger than the inner diameter of the fourth cylindrical portion of the repair drain member, and the fifth cylindrical portion of the storm water drain outlet repair member being harder than the fourth cylindrical portion of the repair drain member,
The fifth cylindrical portion of the storm water drain outlet renovation member is fitted into the fourth cylindrical portion of the renovation drain member, thereby pressing the fourth 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.

The fifth invention is a rainwater drain repair method for 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, the method comprising laying a repaired waterproof sheet except for the rainwater drain outlet, preparing a repaired drain member having a fourth tubular portion and a fourth flange portion protruding from the outer periphery of one end of the fourth tubular portion, applying an adhesive to the inner peripheral surface of the first tubular portion of the existing drain member or the outer periphery of the fourth tubular portion of the repaired drain member, and fitting the fourth tubular portion of the repaired drain member into the first tubular portion of the existing drain member,
The rainwater drain repair method includes preparing a rainwater drain repair member having a fifth cylindrical portion and a fifth flange portion protruding from an outer periphery of one end of the fifth cylindrical portion, and fitting the fifth cylindrical portion of the rainwater drain repair member into the fourth cylindrical portion of the repair drain member,
The fifth cylindrical portion of the rainwater drain outlet repair member is made of resin or metal, the outer diameter of the fifth cylindrical portion is larger than the inner diameter of the fourth cylindrical portion of the repair drain member, and the fifth cylindrical portion of the rainwater drain outlet repair member is harder than the fourth cylindrical portion of the repair drain member;
The fifth cylindrical portion of the storm water drain outlet renovation member is fitted into the fourth cylindrical portion of the renovation drain member, thereby pressing the fourth 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.

The sixth invention relates to a repaired rainwater drain 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 repaired waterproof sheet is laid on the existing sheet waterproof structure, except for the rainwater drain outlet, and a fourth tubular portion of a repaired drain member having a fourth tubular portion and a fourth flange portion protruding from the outer periphery of one end of the fourth 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 fourth tubular portion of the repaired drain member are joined via an adhesive,
The renovated storm drain structure includes a storm drain renovation member fitted into the fourth cylindrical portion of the renovation drain member, the storm drain renovation member having a fifth cylindrical portion and a fifth flange portion protruding from the outer periphery of one end of the fifth cylindrical portion, the fifth cylindrical portion being made of resin or metal, the outer diameter of the fifth cylindrical portion being larger than the inner diameter of the fourth cylindrical portion of the renovation drain member, the fifth cylindrical portion of the storm drain renovation member being harder than the fourth cylindrical portion of the renovation drain member, and the storm drain renovation member functions to press the fourth cylindrical portion of the renovation drain member against the first cylindrical portion of the existing drain member.

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 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, a rainwater drain outlet repair member is used in a rainwater drain outlet repair method by laying a repaired waterproof sheet except for the rainwater drain outlet, preparing a repaired 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 an 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 repaired drain member, and fitting the second tubular portion of the repaired drain member into the first tubular portion of the existing drain member,
The storm water drain outlet repair component has a third cylindrical portion and a third flange portion protruding from the outer periphery of one end of the third cylindrical portion, the third cylindrical portion being composed of an inner layer made of resin or metal and an outer layer made of foam, rubber or a thermoplastic elastomer, the outer diameter of the inner layer being smaller than the inner diameter of the second cylindrical portion of the repair drain member and the outer diameter of the outer layer being larger than the inner diameter of the second cylindrical portion of the repair drain member, the inner layer of the third cylindrical portion of the storm water drain outlet repair component being harder than the second cylindrical portion of the repair drain member,
A storm drain outlet renovation component in which the third cylindrical portion of the storm drain outlet renovation component 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.
[2] A rainwater drain repair component according to [1], wherein the foam, rubber or thermoplastic elastomer has a 25% compressive strength of 0.02 to 2 MPa.
[3] A storm water drain repair component as described in [1] or [2], wherein the thickness of the outer layer of the third cylindrical portion of the storm water drain repair component is 1 to 10 mm.
[4] A rainwater drain repair component described in any one of [1] to [3], wherein the inner layer and the third flange of the third tubular portion of the rainwater drain repair component are made of polyvinyl chloride resin, polycarbonate, polypropylene or metal.
[5] A storm drain repair component described in any of [1] to [4], wherein the outer layer of the third tubular portion of the storm drain repair component is longer in the axial direction of the tubular portion than the inner layer.
[6] The rainwater drain repair component according to any one of [1] to [5], further having a strainer portion for preventing clogging.

[7] In 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, a method for repairing a rainwater drain outlet is provided by laying a repaired waterproof sheet except for the rainwater drain outlet, preparing a repaired 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 an 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 repaired drain member, and fitting the second tubular portion of the repaired 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 third flange portion protruding from an outer periphery of one end 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,
the third tubular portion of the storm water drain outlet renovation member comprises an inner layer made of resin or metal and an outer layer made of foam, rubber or thermoplastic elastomer, the outer diameter of the inner layer is smaller than the inner diameter of the second tubular portion of the renovation drain member, the outer diameter of the outer layer is larger than the inner diameter of the second tubular portion of the renovation drain member, the inner layer of the third tubular portion of the storm water drain outlet renovation member is harder than the second tubular portion of the renovation drain member,
A storm water drain renovating method comprising fitting a third cylindrical portion of a storm water drain renovating member into a second cylindrical portion of a renovated drain member, thereby pressing the second cylindrical portion of the renovated drain member against the first cylindrical portion of the existing drain member, and bonding the existing drain member and the renovated drain member.
[8] A storm drain renovation method as described in [7], wherein the thickness of the outer layer of the third tubular portion of the storm drain renovation member is 1 to 10 mm, and the outer diameter of the outer layer is 0.1 to 4 mm larger than the inner diameter of the second tubular portion of the renovation drain member.
[9] A method for renovating a storm water drain outlet according to [7] or [8], wherein the renovated drain member is made of soft polyvinyl chloride resin.
[10] The storm water drain renovating method according to any one of [7] to [9], wherein the storm water drain is an inlet of a drain or an overflow pipe.

[11] A repaired rainwater drain 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, in which a renovated waterproof sheet is laid on the existing sheet waterproof structure, except for the rainwater drain outlet, and a second tubular portion of a repaired 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 repaired drain member are joined via an adhesive,
The repaired storm drain structure includes a storm drain repair member fitted into the second cylindrical portion of the repair drain member, the storm drain repair member having a third cylindrical portion and a third flange portion protruding from an outer periphery of one end of the third cylindrical portion, the third cylindrical portion consisting of an inner layer made of resin or metal and an outer layer made of foam, rubber or thermoplastic elastomer, the outer diameter of the inner layer is smaller than the inner diameter of the second cylindrical portion of the repair drain member and the outer diameter of the outer layer is larger than the inner diameter of the second cylindrical portion of the repair drain member, the inner layer of the third cylindrical portion of the storm drain repair member is harder than the second cylindrical portion of the repair drain member, and the storm drain repair member functions to press the second cylindrical portion of the repair drain member against the first cylindrical portion of the existing drain member.

[12] In 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, a rainwater drain outlet repair member is used in a rainwater drain outlet repair method by laying a repaired waterproof sheet except for the rainwater drain outlet, preparing a repaired drain member having a fourth tubular portion and a fourth flange portion protruding from the outer periphery of one end of the fourth tubular portion, applying an adhesive to the inner surface of the first tubular portion of the existing drain member or the outer periphery of the fourth tubular portion of the repaired drain member, and fitting the fourth tubular portion of the repaired drain member into the first tubular portion of the existing drain member,
The storm water drain outlet repair member has a fifth cylindrical portion and a fifth flange portion protruding from an outer periphery of one end of the fifth cylindrical portion, the fifth cylindrical portion being made of resin or metal, the outer diameter of the fifth cylindrical portion being larger than the inner diameter of the fourth cylindrical portion of the repair drain member, and the fifth cylindrical portion of the storm water drain outlet repair member being harder than the fourth cylindrical portion of the repair drain member,
A storm drain outlet renovation component in which the fifth cylindrical portion of the storm drain outlet renovation component is fitted into the fourth cylindrical portion of the renovation drain member, thereby pressing the fourth 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.
[13] A storm drain outlet renovation component as described in [12], wherein the outer diameter of the fifth tubular portion of the storm drain outlet renovation component is tapered so as to become narrower from the fifth flange portion side, and the taper magnitude of the outer diameter of the fifth tubular portion is greater than 0 and not greater than 5/100, and the inner diameter of the fourth tubular portion of the renovation drain member is tapered so as to become narrower from the fourth flange portion side, and the taper magnitude of the inner diameter of the fourth tubular portion is greater than 0 and not greater than 5/100.
[14] A storm water drain repair component as described in [12] or [13], wherein the outer diameter of the fifth cylindrical portion of the storm water drain repair component is 0.1 to 0.5 mm larger than the inner diameter of the fourth cylindrical portion of the repair drain member.

[15] In 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, a method for repairing a rainwater drain outlet is provided by laying a repaired waterproof sheet except for the rainwater drain outlet, preparing a repaired drain member having a fourth tubular portion and a fourth flange portion protruding from the outer periphery of one end of the fourth tubular portion, applying an adhesive to the inner surface of the first tubular portion of the existing drain member or the outer periphery of the fourth tubular portion of the repaired drain member, and fitting the fourth tubular portion of the repaired drain member into the first tubular portion of the existing drain member,
The rainwater drain repair method includes preparing a rainwater drain repair member having a fifth cylindrical portion and a fifth flange portion protruding from an outer periphery of one end of the fifth cylindrical portion, and fitting the fifth cylindrical portion of the rainwater drain repair member into the fourth cylindrical portion of the repair drain member,
The fifth cylindrical portion of the rainwater drain outlet repair member is made of resin or metal, the outer diameter of the fifth cylindrical portion is larger than the inner diameter of the fourth cylindrical portion of the repair drain member, and the fifth cylindrical portion of the rainwater drain outlet repair member is harder than the fourth cylindrical portion of the repair drain member;
A storm water drain renovating method comprising: fitting a fifth cylindrical portion of a storm water drain renovating member into a fourth cylindrical portion of a renovated drain member, thereby pressing the fourth cylindrical portion of the renovated drain member against the first cylindrical portion of an existing drain member, and bonding the existing drain member and the renovated drain member together.

[16] A repaired rainwater drain structure in which an existing waterproof sheet is laid on the surface of a 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 renovated waterproof sheet is laid on the existing sheet waterproof structure, except for the rainwater drain outlet, and a fourth tubular portion of a repaired drain member having a fourth tubular portion and a fourth flange portion protruding from the outer periphery of one end of the fourth 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 fourth tubular portion of the repaired drain member are joined via an adhesive,
The renovated storm drain structure includes a storm drain renovation member fitted into the fourth cylindrical portion of the renovation drain member, the storm drain renovation member having a fifth cylindrical portion and a fifth flange portion protruding from an outer periphery of one end of the fifth cylindrical portion, the fifth cylindrical portion being made of resin or metal, the outer diameter of the fifth cylindrical portion being larger than the inner diameter of the fourth cylindrical portion of the renovation drain member, the fifth cylindrical portion of the storm drain renovation member being harder than the fourth cylindrical portion of the renovation drain member, and the storm drain renovation member functions to press the fourth cylindrical portion of the renovation drain member against the first cylindrical portion of the existing drain member.

According to the present invention, the finished state can be achieved with the repair parts inserted, and there is no need to retrieve the repair parts after the adhesive has hardened, which shortens the construction period and ensures that there is no shortage of pressure bonding time.

FIG. 1 is a plan view and a cross-sectional view of a storm water drainage outlet repair component of the present invention. FIG. 2 is a cross-sectional view of the improved storm drain structure of the present invention. FIG. 3 is a plan view and a cross-sectional view of a storm water drainage outlet repair component according to another embodiment of the present invention. FIG. 4 is a cross-sectional view of a renovated storm drain structure including a storm drain renovation member according to yet another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings, but the present invention is not limited to those shown in the drawings.
Fig. 1 is a plan view and a cross-sectional view of the storm water drainage outlet repair member of the present invention, Fig. 1(a) is a plan view, Fig. 1(b) is a cross-sectional view taken along line II. Fig. 2 is a cross-sectional view of the repaired storm water drainage outlet structure of the present invention.

The rainwater drain outlet repair member 1 of the present 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 a surface 12 of a roof, veranda or balcony of a building, except for a rainwater drain outlet 13, and an existing drain member 15 having a first tubular portion 15a and a first flange portion 15b protruding from an outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet 13, the rainwater drain outlet repair member 1 is used in a rainwater drain outlet repair method in which a repair waterproof sheet 16 is laid except for the rainwater drain outlet 13, a repair drain member 17 having a second tubular portion 17a and a second flange portion 17b protruding from an outer periphery of one end of the second tubular portion is prepared, an adhesive 18 is applied 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 the second tubular portion 17a of the repair drain member is fitted into the first tubular portion 15a of the existing drain member,
The storm water drainage outlet repair member 1 has a third cylindrical portion 2 and a third flange portion 3 protruding from the outer periphery of one end of the third cylindrical portion, the third cylindrical portion 2 is composed of an inner layer 4 made of resin or metal and an outer layer 5 made of foam, rubber or a thermoplastic elastomer, the outer diameter of the inner layer 4 is smaller than the inner diameter of the second cylindrical portion 17a of the repair drain member, the outer diameter of the outer layer 5 is larger than the inner diameter of the second cylindrical portion 17a of the repair drain member, the inner layer 4 of the third cylindrical portion of the storm water drainage outlet repair member is harder than the second cylindrical portion 17a of the repair drain member,
The method is characterized in that by fitting the third tubular portion 2 of the storm water drain outlet renovation member into the second tubular portion 17a of the renovation drain member, the second tubular portion 17a of the renovation drain member is pressed against the first tubular portion 15a of the existing drain member, and the existing drain member 15 and the renovation drain member 17 are bonded together.

Since the outer diameter of the outer layer 5 is larger than the inner diameter of the second cylindrical portion 17a of the renovated drain member, when the third cylindrical portion 2 of the storm water drain outlet renovation member is fitted into the second cylindrical portion 17a of the renovated drain member, the second cylindrical portion 17a of the renovated drain member is pressed against the first cylindrical portion 15a of the existing drain member, effectively bonding the existing drain member 15 and the renovated drain member 17.

The storm water drainage outlet repair component 1 has a third tubular portion 2 and a third flange portion 3. The third flange portion 3 is provided to protrude from the outer periphery of one end of the third tubular portion. The third tubular portion 2 is made of an inner layer 4 and an outer layer 5. The inner layer 4 is made of resin or metal. The outer layer 5 is made of foam, rubber or thermoplastic elastomer.
The cross section perpendicular to the axial direction of the third cylindrical portion 2 preferably has a circular shape. The third flange portion 3 preferably has a circular shape.

The material constituting the third flange portion 3 is preferably a resin or a metal. The material constituting the third flange portion 3 may be the same as or different from the material constituting the inner layer 4. Preferably, the inner layer 4 and the third flange portion 3 are integrally molded from the same material.
The resin constituting the inner layer 4 and the third flange portion 3 may be a thermoplastic resin or a thermosetting resin, but is preferably a thermoplastic resin. Examples of the thermoplastic resin constituting the inner layer 4 and the third flange portion 3 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 constituting the inner layer 4 and the third flange portion 3 include aluminum and stainless steel, with aluminum being preferred.

The inner layer 4 of the third cylindrical portion of the rainwater drain outlet repair member is harder than the second cylindrical portion 17a of the repair drain member. Since the inner layer 4 of the third cylindrical portion of the rainwater drain outlet repair member is harder than the second cylindrical portion 17a of the repair drain member, when the third cylindrical portion 2 of the rainwater 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 can be pressed against the first cylindrical portion 15a of the existing drain member, effectively bonding the existing drain member 15 and the repair drain member 17. The hardness of the inner layer 4 and the second cylindrical portion 17a of the repair drain member is measured using a durometer. A preferred combination of the material constituting the inner layer 4 and the material constituting the second cylindrical portion 17a of the repair drain member is that the inner layer 4 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.

The foam, rubber or thermoplastic elastomer constituting the outer layer 5 preferably has a 25% compressive strength of 0.02 to 2 MPa, more preferably has a 25% compressive strength of 0.02 to 0.3 MPa, and further preferably has a 25% compressive strength of 0.03 to 0.2 MPa. By having a compressive strength in this range, when the third tubular portion 2 of the storm water drain outlet repair member is fitted into the second tubular portion 17a of the repair drain member, the second tubular portion 17a of the repair drain member can be pressed against the first tubular portion 15a of the existing drain member, and the existing drain member 15 and the repair drain member 17 can be effectively bonded to each other.
The compressive strength is measured in accordance with JIS Z 0235.
The foam constituting the outer layer 5 is not limited as long as it has the above-mentioned compressive strength, but examples thereof include foamed polyethylene, foamed polystyrene, foamed ethylene propylene diene rubber (foamed EPDM), etc. Among these, foamed polyethylene is preferable.
The rubber constituting the outer layer 5 is not limited as long as it has the above-mentioned compressive strength, but examples thereof include ethylene propylene diene rubber (EPDM), urethane rubber, nitrile butadiene rubber, etc. Among these, EPDM is preferable.
The thermoplastic elastomer constituting the outer layer 5 is not limited as long as it has the above-mentioned compressive strength, and examples of the thermoplastic elastomer include styrene-based thermoplastic elastomers, polyester-based thermoplastic elastomers, vinyl chloride-based thermoplastic elastomers, etc. Among these, vinyl chloride-based thermoplastic elastomers are preferred.

The thickness of the outer layer 5 of the third tubular portion of the storm drain outlet repair member is not limited as long as the second tubular portion 17a of the repair drain member can be pressed against the first tubular portion 15a of the existing drain member to bond the existing drain member 15 and the repair drain member 17 when the third tubular portion 2 of the storm drain outlet repair member is fitted into the second tubular portion 17a of the repair drain member, but is preferably 1 to 10 mm, more preferably 1 to 5 mm, and even more preferably 1 to 2 mm.

The outer diameter of the outer layer 5 is larger than the inner diameter of the second cylindrical portion of the repair drain member. The difference between the outer diameter of the outer layer 5 and the inner diameter of the second cylindrical portion of the repair drain member is not limited as long as the second cylindrical portion 17a of the repair drain member can be pressed against the first cylindrical portion 15a of the existing drain member to bond the existing drain member 15 and the repair drain member 17 when the third cylindrical portion 2 of the storm water drain outlet repair member is fitted into the second cylindrical portion 17a of the repair drain member, but the outer diameter of the outer layer 5 is preferably 0.1 to 4 mm larger, more preferably 0.1 to 3 mm larger, and even more preferably 0.1 to 2 mm larger than the inner diameter of the second cylindrical portion 17a of the repair drain member 17.
The outer diameter of the outer layer 5 depends on the inner diameter of the second cylindrical portion of the repaired drain member, but is, for example, 69 to 77 mm, preferably 69 to 76 mm, and more preferably 69 to 75 mm.

The outer diameter of the inner layer 4 is smaller than the inner diameter of the second cylindrical portion 17a of the repair drain member. Since the outer diameter of the inner layer 4 is smaller than the inner diameter of the second cylindrical portion 17a of the repair drain member, the third cylindrical portion 2 of the storm water drain outlet repair member can be fitted into the second cylindrical portion 17a of the repair drain member. The difference between the outer diameter of the outer layer 5 and the inner diameter of the second cylindrical portion of the repair drain member is not limited, but is preferably 0.1 to 4 mm, more preferably 0.1 to 3 mm, and even more preferably 0.1 to 2 mm.
The outer diameter of the inner layer 4 depends on the inner diameter of the second cylindrical portion of the repair drain member, but is, for example, 30 to 75 mm, preferably 60 to 73 mm, and more preferably 68 to 73 mm.
The thickness of the inner layer 4 is not limited, but is preferably 0.5 to 3 mm, more preferably 0.5 to 2 mm, and further preferably 1 to 2 mm.

The axial lengths of the tubular parts of the outer layer 5 and the inner layer 4 may be the same as shown in FIG. 1(b) or may be different as shown in FIG. 3(b). Preferably, the outer layer 5 of the third tubular part of the inner layer storm water drainage outlet repair member is longer in the axial direction of the tubular part than the inner layer 4. By having the outer layer 5 of the third tubular part of the inner layer storm water drainage outlet repair member longer in the axial direction of the tubular part than the inner layer 4, it becomes easier to fit the third tubular part of the storm water drainage outlet repair member into the second tubular part of the repair drain member.

The outer diameter of the third flange portion 3 of the storm water drainage outlet repair component is not limited, but is preferably 77 to 100 mm, more preferably 80 to 90 mm, and even more preferably 80 to 85 mm.

The method for manufacturing the storm water drainage outlet repair component 1 is not limited, but it can be manufactured as follows.
The inner layer 4 and the third flange 3 of the third tubular portion of the storm water drainage outlet repair member are produced by injection molding a material constituting the inner layer 4 and the third flange 3. Separately, a cylindrical object made of foam, rubber or thermoplastic elastomer is produced by a known method to form the outer layer 5 of the third tubular portion of the storm water drainage outlet repair member.

The modified 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. The material constituting the second cylindrical portion 17a and the second flange portion 17b is not limited, but examples include soft polyvinyl chloride resin, EPDM, and urethane resin, and among these, soft polyvinyl chloride resin is preferable.

The inner diameter of the second cylindrical portion 17a of the repair drain member 17 is preferably 36 to 75 mm, more preferably 69 to 73 mm, and even more preferably 69 to 70 mm.
The outer diameter of the second cylindrical portion 17a of the modified drain member 17 is smaller than the inner diameter of the first cylindrical portion 15a of the existing drain member 15, and is preferably 40 to 79 mm, and 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.

A known existing drain member 15 can be used. 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 materials constituting the first cylindrical portion 15a and the first flange portion 15b are not limited, but include hard polyvinyl chloride resin, soft polyvinyl chloride resin, metal, etc., and among these, soft polyvinyl chloride resin is preferable.

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 further 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 further 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 further preferably 220 to 250 mm.

The existing waterproof sheet 14 and the revised waterproof sheet 16 can be any known material, and examples include, but are not limited to, a soft polyvinyl chloride resin sheet and a vulcanized rubber sheet. Of these, a soft polyvinyl chloride resin sheet is preferred.

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, PVC piping adhesives and modified silicones, with PVC piping adhesives being preferred.

The storm water drain 13 is preferably the inlet of a drain or overflow pipe.

Fig. 3 is a plan view and a cross-sectional view of another embodiment of the rainwater drain repair member of the present invention, Fig. 3(a) is a plan view, and Fig. 3(b) is a cross-sectional view taken along line II-II. The rainwater drain repair member 1 of Fig. 3 has a strainer portion 6 for preventing clogging. The rainwater drain repair member of Fig. 3 is the same as the rainwater drain repair member of Fig. 1, except that it has a strainer portion 6 for preventing 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 flange portion 3 or the third cylindrical portion 2 in a non-removable manner or in a removably manner.
The material constituting the strainer portion 6 is not limited, but is preferably a thermoplastic resin or a metal. Examples of the thermoplastic resin include rigid polyvinyl chloride resin, polycarbonate, polypropylene, etc., with rigid polyvinyl chloride resin being preferred. Examples of the metal include stainless steel and aluminum, with aluminum being preferred. The material constituting the strainer portion 6 may be the same as or different from the material constituting the third flange portion 3 or the third tubular portion 2.
Preferably, as shown in FIG. 3, the strainer portion 6 is integrally formed with the third flange portion 3 and the third cylindrical portion 2.
By providing a strainer function to the storm water drain 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.

The second 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 except for a rainwater drain 13, and an existing drain member 15 having a first tubular portion 15a and a first flange portion 15b protruding from an outer periphery of one end of the first tubular portion is provided at the rainwater drain 13, the method comprising laying a repaired waterproof sheet 16 except for the rainwater drain 13, preparing a repaired drain member 17 having a second tubular portion 17a and a second flange portion 17b protruding from an 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 repaired drain member 17, and fitting the second tubular portion 17a of the repaired 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 third flange portion 3 protruding from an outer periphery of one end 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,
The third cylindrical portion 2 of the storm water drainage outlet renovation member 1 is composed of an inner layer 4 made of resin or metal and an outer layer 5 made of foam, rubber or thermoplastic elastomer, the outer diameter of the inner layer 4 is smaller than the inner diameter of the second cylindrical portion 17a of the renovation drain member 17, the outer diameter of the outer layer 5 is larger than the inner diameter of the second cylindrical portion 17a of the renovation drain member 17, the inner layer 4 of the third cylindrical portion 2 of the storm water drainage outlet renovation member 1 is harder than the second cylindrical portion 17a of the renovation drain member 17,
The method is characterized in that by fitting the third cylindrical portion 2 of the storm water drain outlet renovation member 1 into the second cylindrical portion 17a of the renovation drain member 17, the second cylindrical portion 17a of the renovation drain member 17 is pressed against the first cylindrical portion 15a of the existing drain member 15, and the existing drain member 15 and the renovation drain member 17 are bonded together.

The third invention relates to a repaired rainwater drain structure 11, in which an existing waterproof sheet 14 is laid on the surface 12 of a building roof, veranda or balcony, except for a rainwater drain 13, and an existing drain member 15 having a first tubular portion 15a and a first flange portion 15b protruding from an outer periphery of one end of the first tubular portion is provided at the rainwater drain 13, and a repaired waterproof sheet 16 is laid on the existing sheet waterproof structure, except for the rainwater drain 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 an 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 storm water drain structure 11 includes a storm water drain repair member 1 fitted into the second cylindrical portion 17a of the repaired drain member 17. The storm water drain repair member 1 has a third cylindrical portion 2 and a third flange portion 3 protruding from one end outer periphery of the third cylindrical portion. The third cylindrical portion 2 is made of an inner layer 4 made of resin or metal and an outer layer 5 made of foam, rubber or thermoplastic elastomer. The outer diameter of the inner layer 4 is 10 mm or more than the outer diameter of the repaired drain member 17. the outer diameter of the outer layer 5 is smaller than the inner diameter of the second tubular portion 17a of the repair drain member 17, the inner layer 4 of the third tubular portion 2 of the storm water drain outlet repair member 1 is harder than the second tubular portion 17a of the repair drain member 17, and the storm water drain outlet repair member 1 functions to press the second tubular portion 17a of the repair drain member 17 against the first tubular portion 15a of the existing drain member 15.

Figure 2 shows an example of a modified storm water drain structure of the present invention. In Figure 2, 19 is a drain pipe.

FIG. 4 is a cross-sectional view of a renovated storm drain structure 21 including a storm drain renovation member 22 according to yet another embodiment of the present invention.
The fourth invention relates to 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 a rainwater drainage 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 drainage outlet 13, in which a modified waterproof sheet 16 is laid except for the rainwater drainage outlet 13, and a fourth tubular portion 25a and a fourth a fourth flange portion 25b protruding from an outer periphery of one end of a cylindrical portion of a repair drain member 25; an adhesive 18 is applied to an inner periphery of a first cylindrical portion 15a of an existing drain member 15 or an outer periphery of a fourth cylindrical portion 25a of the repair drain member 25; and the fourth cylindrical portion 25a of the repair drain member 25 is fitted into the first cylindrical portion 15a of the existing drain member,
The storm water drainage outlet repair member 22 has a fifth cylindrical portion 23 and a fifth flange portion 24 protruding from the outer periphery of one end of the fifth cylindrical portion, the fifth cylindrical portion 23 is made of resin or metal, the outer diameter of the fifth cylindrical portion 23 is larger than the inner diameter of the fourth cylindrical portion 25a of the repair drain member, and the fifth cylindrical portion 23 of the storm water drainage outlet repair member is harder than the fourth cylindrical portion 25a of the repair drain member,
The method is characterized in that by fitting the fifth cylindrical portion 23 of the storm water drain outlet renovation member into the fourth cylindrical portion 25a of the renovation drain member, the fourth cylindrical portion 25a of the renovation drain member is pressed against the first cylindrical portion 15a of the existing drain member, and the existing drain member 15 and the renovation drain member 25 are bonded together.
Since the outer diameter of the fifth tubular portion 23 is larger than the inner diameter of the fourth tubular portion 25a of the renovation drain member, when the fifth tubular portion 23 of the storm water drain outlet renovation member is fitted into the fourth tubular portion 25a of the renovation drain member, the fourth tubular portion 25a of the renovation drain member can be pressed against the first tubular portion 15a of the existing drain member, thereby adhering the existing drain member 15 and the renovation drain member 25.

The outer diameter of the fifth cylindrical portion 23 of the storm water drainage outlet repair member is preferably tapered so as to become narrower from the side of the fifth flange portion 24. The magnitude of the taper of the outer diameter of the fifth cylindrical portion 23 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 fifth cylindrical portion 23 refers to the difference between the outer diameter _D1 of the end of the fifth cylindrical portion 23 on the fifth flange portion 24 side and the outer diameter _D2 of the end of the fifth cylindrical portion 23 opposite the fifth flange portion 24 side, divided by the axial length _L1 of the fifth cylindrical portion 23.
The inner diameter of the fourth cylindrical portion 25a of the repair drain member is preferably tapered so as to become narrower from the fourth flange portion 25b side. The degree of taper of the inner diameter of the fourth cylindrical portion 25a 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 inner diameter of the fourth cylindrical portion 25a refers to the difference between the inner diameter _D3 of the end of the fourth cylindrical portion 25a facing the fourth flange portion 25b and the inner diameter _D4 of the end of the fourth cylindrical portion 25a opposite to the fourth flange portion 25b, divided by the axial length _L2 of the fourth cylindrical portion 25a .
The taper may be provided on both the fifth cylindrical portion 23 of the storm water drain outlet renovation member and the fourth cylindrical portion 25a of the renovation drain member, or on either one of them.
By having the fifth cylindrical portion 23 and/or the fourth cylindrical portion 25a tapered, the storm water drainage outlet repair member can be securely fitted into the fourth cylindrical portion 25a without getting caught.

The outer diameter of the fifth cylindrical portion 23 of the storm water drain outlet renovation member is preferably 0.1 to 0.5 mm larger, more preferably 0.2 to 0.4 mm larger, and even more preferably 0.2 to 0.3 mm larger than the inner diameter of the fourth cylindrical portion 25a of the renovation drain member.
When the outer diameter of the fifth tubular portion 23 of the storm drain outlet renovation member or the inner diameter of the fourth tubular portion 25a of the renovation drain member is tapered, the difference between the outer diameter of the fifth tubular portion 23 of the storm drain outlet renovation member and the inner diameter of the fourth tubular portion 25a of the renovation drain member refers to the difference at the corresponding position when the fifth tubular portion 23 of the storm drain outlet renovation member is fitted into the fourth tubular portion 25a of the renovation drain member.

The storm water drain repair member 22 of the fourth invention is the same as the storm water drain repair member 1 of the first invention, except that the fifth cylindrical portion 23 does not have an outer layer, the fifth cylindrical portion 23 or the fourth cylindrical portion 25a is tapered, and there is a difference between the outer diameter of the cylindrical portion of the storm water drain repair member and the inner diameter of the cylindrical portion of the repair drain member.

The fifth invention is a rainwater drain repair method for 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 except for a rainwater drain 13, and an existing drain member 15 having a first tubular portion 15a and a first flange portion 15b protruding from an outer periphery of one end of the first tubular portion is provided at the rainwater drain 13, the method comprising: laying a repaired waterproof sheet 16 except for the rainwater drain 13; preparing a repaired drain member 25 having a fourth tubular portion 25a and a fourth flange portion 25b protruding from an outer periphery of one end of the fourth 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 fourth tubular portion 25a of the repaired drain member; and fitting the fourth tubular portion 25a of the repaired drain member into the first tubular portion 15a of the existing drain member;
The rainwater drainage outlet repair method includes preparing a rainwater drainage outlet repair member 22 having a fifth cylindrical portion 23 and a fifth flange portion 24 protruding from an outer periphery of one end of the fifth cylindrical portion, and fitting the fifth cylindrical portion 23 of the rainwater drainage outlet repair member into the fourth cylindrical portion 25a of the repair drain member,
The fifth cylindrical portion 23 of the rainwater drain outlet repair member is made of resin or metal, the outer diameter of the fifth cylindrical portion 23 is larger than the inner diameter of the fourth cylindrical portion 25a of the repair drain member, and the fifth cylindrical portion 23 of the rainwater drain outlet repair member is harder than the fourth cylindrical portion 25a of the repair drain member;
The method is characterized in that by fitting the fifth cylindrical portion 23 of the storm water drain outlet renovation member into the fourth cylindrical portion 25a of the renovation drain member, the fourth cylindrical portion 25a of the renovation drain member is pressed against the first cylindrical portion 15a of the existing drain member, and the existing drain member 15 and the renovation drain member 25 are bonded together.

The storm water drain repair method of the fifth invention is the same as the storm water drain repair method of the second invention, except that the fifth cylindrical portion 23 does not have an outer layer, the fifth cylindrical portion 23 or the fourth cylindrical portion 25a is tapered, and there is a difference between the outer diameter of the cylindrical portion of the storm water drain repair member and the inner diameter of the cylindrical portion of the repair drain member.

The sixth invention relates to a repaired rainwater drain structure 21, in which an existing waterproof sheet 14 is laid on the surface 12 of a building roof, veranda or balcony, except for a rainwater drain 13, and an existing drain member 15 having a first tubular portion 15a and a first flange portion 15b protruding from an outer periphery of one end of the first tubular portion is provided at the rainwater drain 13, and a repaired waterproof sheet 16 is laid on the existing sheet waterproof structure, except for the rainwater drain 13, and a fourth tubular portion 25a of a repaired drain member 25 having a fourth tubular portion 25a and a fourth flange portion 25b protruding from an outer periphery of one end of the fourth tubular portion is fitted into the first tubular portion 15a of the existing drain member, and the inner peripheral surface of the first tubular portion 15a of the existing drain member and the outer peripheral surface of the fourth tubular portion 25a of the repaired drain member are joined via an adhesive 18,
The renovated storm drain outlet structure 21 includes a storm drain outlet renovation member 22 fitted into the fourth cylindrical portion 25a of the renovation drain member, and the storm drain outlet renovation member 22 has a fifth cylindrical portion 23 and a fifth flange portion 24 protruding from the outer periphery of one end of the fifth cylindrical portion, the fifth cylindrical portion 23 is made of resin or metal, the outer diameter of the fifth cylindrical portion 23 is larger than the inner diameter of the fourth cylindrical portion 25a of the renovation drain member, the fifth cylindrical portion 23 of the storm drain outlet renovation member is harder than the fourth cylindrical portion 25a of the renovation drain member, and the storm drain outlet renovation member 22 functions to press the fourth cylindrical portion 25a of the renovation drain member against the first cylindrical portion 15a of the existing drain member.

The renovated storm water drain structure 21 of the sixth invention is the same as the renovated storm water drain structure 11 of the third invention, except that the fifth cylindrical portion 23 does not have an outer layer, the fifth cylindrical portion 23 or the fourth cylindrical portion 25a is tapered, and there is a difference between the outer diameter of the cylindrical portion of the storm water drain renovation member and the inner diameter of the cylindrical portion of the renovation drain member.

The rainwater drain repair component of the present invention can be suitably used to repair rainwater drains installed on the roof, veranda or balcony of a building.

LIST OF SYMBOLS 1 Rainwater drain renovating member 2 Third tubular portion 3 Third flange portion 4 Inner layer 5 Outer layer 6 Strainer portion 11 Renovated rainwater drain structure 12 Surface of building roof, veranda or balcony 13 Rainwater drain 14 Existing waterproof sheet 15 Existing drain member 15a First tubular portion 15b First flange portion 16 Renovated waterproof sheet 17 Renovated drain member 17a Second tubular portion 17b Second flange portion 18 Adhesive 19 Drain pipe 21 Renovated rainwater drain structure 22 Rainwater drain renovating member 23 Fifth tubular portion 24 Fifth flange portion 25 Renovated drain member 25a Fourth tubular portion 25b Fourth flange portion

Claims (16)

A rainwater drain repair member for use in 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, the rainwater drain outlet repair member being used in a rainwater drain outlet repair method by laying a repaired waterproof sheet except for the rainwater drain outlet, preparing a repaired 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 an 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 repaired drain member, and fitting the second tubular portion of the repaired drain member into the first tubular portion of the existing drain member,
The storm water drain outlet repair component has a third cylindrical portion and a third flange portion protruding from an outer periphery of one end of the third cylindrical portion, the third cylindrical portion being composed of an inner layer made of resin or metal and an outer layer made of foam, rubber or thermoplastic elastomer, the outer diameter of the inner layer being smaller than the inner diameter of the second cylindrical portion of the repair drain member, and the outer diameter of the outer layer being larger than the inner diameter of the second cylindrical portion of the repair drain member ,
A storm drain outlet renovation component in which the third cylindrical portion of the storm drain outlet renovation component 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. The storm water drain repair component according to claim 1, wherein the foam, rubber or thermoplastic elastomer has a 25% compressive strength of 0.02 to 2 MPa. The rainwater drain repair component according to claim 1 or 2, wherein the thickness of the outer layer of the third cylindrical portion of the rainwater drain repair component is 1 to 10 mm. The rainwater drain repair component according to any one of claims 1 to 3, wherein the inner layer of the third cylindrical portion and the third flange portion of the rainwater drain repair component are made of rigid polyvinyl chloride resin, polycarbonate, polypropylene or metal. The rainwater drain repair component according to any one of claims 1 to 4, wherein the outer layer of the third cylindrical portion of the rainwater drain repair component is longer in the axial direction of the cylindrical portion than the inner layer. The rainwater drain repair component according to any one of claims 1 to 5, further comprising a strainer section for preventing clogging. 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 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 an outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet, the method comprising: laying a repaired waterproof sheet except for the rainwater drain outlet, preparing a repaired drain member having a second tubular portion and a second flange portion protruding from an outer periphery of one end of the second tubular portion, applying an adhesive to an inner surface of the first tubular portion of the existing drain member or an outer periphery of the second tubular portion of the repaired drain member, and fitting the second tubular portion of the repaired 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 third flange portion protruding from an outer periphery of one end 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,
the third tubular portion of the storm water drain outlet renovation member comprises an inner layer made of resin or metal and an outer layer made of foam, rubber or thermoplastic elastomer, the outer diameter of the inner layer is smaller than the inner diameter of the second tubular portion of the renovation drain member, the outer diameter of the outer layer is larger than the inner diameter of the second tubular portion of the renovation drain member, the inner layer of the third tubular portion of the storm water drain outlet renovation member is harder than the second tubular portion of the renovation drain member,
A storm water drain renovating method comprising fitting a third cylindrical portion of a storm water drain renovating member into a second cylindrical portion of a renovated drain member, thereby pressing the second cylindrical portion of the renovated drain member against the first cylindrical portion of the existing drain member, and bonding the existing drain member and the renovated drain member. The storm water drain repair method according to claim 7, wherein the thickness of the outer layer of the third cylindrical portion of the storm water drain repair member is 1 to 10 mm, and the outer diameter of the outer layer is 0.1 to 4 mm larger than the inner diameter of the second cylindrical portion of the repair drain member. The method for repairing a storm water drain according to claim 7 or 8, wherein the repair drain member is made of soft polyvinyl chloride resin. The method for repairing a storm water drain according to any one of claims 7 to 9, wherein the storm water drain is an inlet of a drain or an overflow pipe. A repaired rainwater drain structure in which an existing waterproof sheet is laid on the surface of a 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, and a renovated waterproof sheet is laid on the existing sheet waterproof structure, except for the rainwater drain outlet, and a second tubular portion of a repaired 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 repaired drain member are joined via an adhesive,
The repaired storm drain structure includes a storm drain repair member fitted into the second cylindrical portion of the repair drain member, the storm drain repair member having a third cylindrical portion and a third flange portion protruding from an outer periphery of one end of the third cylindrical portion, the third cylindrical portion consisting of an inner layer made of resin or metal and an outer layer made of foam, rubber or thermoplastic elastomer, the outer diameter of the inner layer is smaller than the inner diameter of the second cylindrical portion of the repair drain member and the outer diameter of the outer layer is larger than the inner diameter of the second cylindrical portion of the repair drain member, the inner layer of the third cylindrical portion of the storm drain repair member is harder than the second cylindrical portion of the repair drain member, and the storm drain repair member functions to press the second cylindrical portion of the repair drain member against the first cylindrical portion of the existing drain member. A rainwater drain repair member for use in a rainwater drain repair method in 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, the rainwater drain outlet repair member being used in a rainwater drain outlet repair method in which a repaired waterproof sheet is laid except for the rainwater drain outlet, a repaired drain member having a fourth tubular portion and a fourth flange portion protruding from the outer periphery of one end of the fourth tubular portion is prepared, an adhesive is applied to the inner surface of the first tubular portion of the existing drain member or the outer periphery of the fourth tubular portion of the repaired drain member, and the fourth tubular portion of the repaired drain member is fitted into the first tubular portion of the existing drain member,
The rainwater drainage outlet repair member has a fifth cylindrical portion and a fifth flange portion protruding radially outward from an outer periphery of one end of the fifth cylindrical portion, the fifth cylindrical portion being made of resin or metal, and the outer diameter of the fifth cylindrical portion being larger than the inner diameter of the fourth cylindrical portion of the repair drain member ,
A storm drain outlet renovation component in which the fifth cylindrical portion of the storm drain outlet renovation component is fitted into the fourth cylindrical portion of the renovation drain member, thereby pressing the fourth 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. The rainwater drain repair member according to claim 12, wherein the outer diameter of the fifth cylindrical portion of the rainwater drain repair member is tapered from the fifth flange portion side, and the taper of the outer diameter of the fifth cylindrical portion is greater than 0 and less than 5/100, and the inner diameter of the fourth cylindrical portion of the repair drain member is tapered from the fourth flange portion side, and the taper of the inner diameter of the fourth cylindrical portion is greater than 0 and less than 5/100. The rainwater drain repair component according to claim 12 or 13, wherein the outer diameter of the fifth cylindrical portion of the rainwater drain repair component is 0.1 to 0.5 mm larger than the inner diameter of the fourth cylindrical portion of the repair drain member. 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 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 an outer periphery of one end of the first tubular portion is provided at the rainwater drain outlet, the method comprising: laying a repaired waterproof sheet except for the rainwater drain outlet; preparing a repaired drain member having a fourth tubular portion and a fourth flange portion protruding from an outer periphery of one end of the fourth tubular portion; applying an adhesive to an inner surface of the first tubular portion of the existing drain member or an outer periphery of the fourth tubular portion of the repaired drain member; and fitting the fourth tubular portion of the repaired drain member into the first tubular portion of the existing drain member,
The rainwater drain repair method includes preparing a rainwater drain repair member having a fifth cylindrical portion and a fifth flange portion protruding radially outward from an outer periphery of one end of the fifth cylindrical portion, and fitting the fifth cylindrical portion of the rainwater drain repair member into the fourth cylindrical portion of the repair drain member,
The fifth cylindrical portion of the rainwater drain outlet repair member is made of resin or metal, the outer diameter of the fifth cylindrical portion is larger than the inner diameter of the fourth cylindrical portion of the repair drain member, and the fifth cylindrical portion of the rainwater drain outlet repair member is harder than the fourth cylindrical portion of the repair drain member;
A storm water drain renovating method comprising: fitting a fifth cylindrical portion of a storm water drain renovating member into a fourth cylindrical portion of a renovated drain member, thereby pressing the fourth cylindrical portion of the renovated drain member against the first cylindrical portion of an existing drain member, and bonding the existing drain member and the renovated drain member together. A repaired rainwater drain structure in which an existing waterproof sheet is laid on the surface of a 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, and a renovated waterproof sheet is laid on the existing sheet waterproof structure, except for the rainwater drain outlet, and a fourth tubular portion of a repaired drain member having a fourth tubular portion and a fourth flange portion protruding from the outer periphery of one end of the fourth 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 fourth tubular portion of the repaired drain member are joined via an adhesive,
The renovated storm drain structure includes a storm drain renovation member fitted into the fourth cylindrical portion of the renovation drain member, the storm drain renovation member having a fifth cylindrical portion and a fifth flange portion protruding radially outward from an outer periphery of one end of the fifth cylindrical portion, the fifth cylindrical portion being made of resin or metal, the outer diameter of the fifth cylindrical portion being larger than the inner diameter of the fourth cylindrical portion of the renovation drain member, the fifth cylindrical portion of the storm drain renovation member being harder than the fourth cylindrical portion of the renovation drain member, and the storm drain renovation member functions to press the fourth cylindrical portion of the renovation drain member against the first cylindrical portion of the existing drain member.

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