JP7435977B2 - How to repair inner traps and existing drain traps - Google Patents

Description

The present invention relates to a resin inner trap used for repairing an existing drain trap, and a method for repairing an existing drain trap using the inner trap.

Patent Document 1 describes a technique related to a method for repairing a drain trap installed on the floor of a building. FIG. 13 shows an existing drainage trap 100 repaired by the repair method described in Patent Document 1. In the repair method described in Patent Document 1, after the bell-shaped water sealing cap 102 of the existing drainage trap 100 is removed, the inside of the existing drainage trap 100, that is, the inner wall surface and bottom surface of the housing part 104, and the The inside and outside of the tube section 106 are cleaned. Here, since the existing drain trap 100 is made of cast iron, a large amount of rust has adhered to it due to long-term use (several decades). Furthermore, the existing drain trap 100 has a vertical pipe section 106 that constitutes a water sealing section inside the housing section 104, and therefore has a complicated shape. For this reason, when cleaning the inside of the existing drainage trap 100, sandblasting or the like is generally used to remove rust. After the inside of the existing drain trap 100 is cleaned, anticorrosive paint is applied to the inner wall surface and bottom of the housing section 104, and the outside of the vertical pipe section 106, and as shown in FIG. A cylindrical rubber covering material 108 is placed on the inside and outside of 106.

Japanese Patent Application Publication No. 2006-118329

In the drain trap repair method described above, sandblasting is used to remove rust from the inside of the existing drain trap 100. Here, since sandblasting is a method of spraying sand, which is an abrasive material, at high pressure inside the existing drainage trap 100, it takes time and effort to prevent sand, rust, etc. from scattering outside. Furthermore, the vertical pipe portion 106 of the existing drain trap 100 becomes thin due to the removal of rust, so even if it is covered with a rubber covering material 108, its durability is low.

The present invention has been made to solve the above-mentioned problems, and the technical problem of the present invention is to facilitate the repair work of existing drain traps and to improve the durability of the existing drain traps after repair. It is to aim for it.

The above problems are solved by each invention. A first invention provides an existing housing part having a bottomed cylindrical shape that is buried in a floor slab of a building and receives drainage on the floor surface through an opening at the upper end, and a water sealing part provided coaxially inside the existing housing part. A bell-shaped water sealing cap is provided on the pre-installed pipe portion to be covered with a flow path secured, and the pre-installed pipe portion is provided coaxially with the pre-installed pipe portion under the bottom of the existing housing portion. , a resin inner trap used for repairing an existing drain trap, which is a bottomed cylinder with an open upper end, and is equipped with an existing lower end connection part that connects the already established pipe part and a drain pipe on a lower floor. a shaped housing part; a cylindrical vertical pipe part that is provided coaxially inside the housing part to form a water sealing part, and is covered with a bell-shaped water sealing cap while securing a flow path; The housing section is provided coaxially with the vertical pipe section under the bottom of the housing section in communication with the vertical pipe section, and includes a lower end connecting section that connects the vertical pipe section and a drain pipe on the lower floor . The outer diameter of the pipe section is set to a value equal to the outer diameter of the drain pipe on the lower floor that is inserted into the lower end connection section, and the housing section is connected to the existing pipe section of the existing drain trap. It is configured such that it can be stored in the existing housing part through the opening at the upper end in a state in which the existing lower end connecting part is removed.

According to the present invention, the housing part of the inner trap is configured such that it can be stored in the existing housing part from the opening at the upper end with the existing drain pipe part and the existing lower end connection part of the existing drainage trap removed. Therefore, the existing drain trap can be repaired by removing the existing pipe section, the existing lower end connecting section, etc. of the existing drain trap, and setting the inner trap of the present invention in the existing housing section. Here, as a method for removing the existing pipe part and the existing lower end connection part of the existing drainage trap, for example, a cylindrical hole saw (diamond hole saw) that forms a through hole in the floor slab of the building is used. That is, by passing a cylindrical hole saw coaxially inside the existing housing part of the existing drain trap and drilling a through hole in the floor slab at the bottom of the existing housing part, the existing drain pipe part and the existing lower end of the existing drain trap are cut through. Connections can be removed at the same time. After opening the through hole, the inner trap of the present invention is set and fixed in the existing housing portion of the existing drain trap, thereby completing the repair of the existing drain trap. Therefore, compared to methods such as repairing the inside of an existing drainage trap by sandblasting, the effort required to repair the existing drainage trap is significantly reduced. Additionally, since the inner trap is newly installed and made of resin, its durability is improved compared to the method of coating the metal after sandblasting.

According to the second invention, hard vinyl chloride is used as the resin, and the outer diameter of the housing portion is set smaller than the inner diameter of the existing housing portion of the existing drain trap. Therefore, the inner trap can be reliably housed inside the existing housing portion of the existing drain trap. Furthermore, by using hard vinyl chloride for the inner trap, it is resistant to corrosion and improves the durability of the inner trap.

an existing housing part having a bottomed cylindrical shape that is buried in a floor slab of a building and receives drainage water on the floor surface through an opening at the upper end; and a water seal part that is coaxially provided inside the existing housing part to form a water sealing part; A bell-shaped water-sealing cap is provided on the pre-installed pipe portion to be covered with a flow path secured, and is provided coaxially with the pre-installed pipe portion under the bottom of the existing housing portion. An inner trap made of resin used for repairing an existing drain trap, comprising a bottomed cylindrical housing part with an open top end, and an existing lower end connection part for connecting a drain pipe on a lower floor. A water sealing part is coaxially provided inside the housing part, and includes a cylindrical vertical pipe part that is covered with a bell-shaped water sealing cap while securing a flow path, and a bottom part of the housing part. The housing part is provided coaxially in communication with the vertical pipe part on the lower side, and includes a lower end connecting part that connects the vertical pipe part and the drainage pipe on the lower floor, and the housing part is connected to the existing drainage pipe. The trap is configured such that it can be stored in the existing housing section through the opening at the upper end with the existing pipe section and the existing lower end connection section removed, and the resin is made of soft vinyl chloride. , the outer diameter of the housing part is set larger than the inner diameter of the existing housing part of the existing drain trap, and the housing part is elastically deformed inward in the radial direction to be housed in the existing housing part. It is the composition.

According to the fourth invention, the outer diameter of the vertical pipe portion is set to a value equal to the outer diameter of the drain pipe inserted into the lower end connecting portion.

A fifth invention is a method for repairing an existing drainage trap using the inner trap according to any one of claims 1 to 4 , wherein a bell-shaped After the preparation process of removing the water sealing cap, a cylindrical hole saw having an inner diameter larger than the outer diameter of the existing lower end connection part of the existing drain trap is coaxially placed inside the existing housing part of the existing drain trap. After the hole saw setting step of inserting and the hole saw setting step, the cylindrical hole saw is driven to rotate, and the bottom of the existing housing part of the existing drain trap and the floor slab overlapping the bottom are cut into a circular planar shape to form a through hole. After the through hole forming step, an adhesive setting step of setting an adhesive on the inner wall surface of the existing housing of the existing drainage trap; After the adhesive setting step, the inner trap is attached to the existing housing. The method includes a trap fixing step of storing the inner trap in an existing housing portion and bonding an outer circumferential surface of the housing portion of the inner trap to an inner wall surface of the existing housing of the existing drain trap.

According to the sixth invention , an epoxy clay-like adhesive is used as the adhesive. Therefore, the inner trap made of resin can be firmly adhered to the inner wall surface and bottom of the existing housing portion of the existing drain trap made of cast iron.

According to the present invention, repair work for an existing drain trap can be facilitated, and durability of the existing drain trap after repair can be improved.

FIG. 2 is a longitudinal cross-sectional view of an inner trap according to an embodiment of the present invention. FIG. 2 is a longitudinal cross-sectional view showing a state in which an existing drainage trap is repaired using the inner trap according to the present embodiment. FIG. 2 is a vertical cross-sectional view showing an existing drainage trap buried in a floor slab of a building. FIG. 3 is a vertical cross-sectional view showing one step of repair work for an existing drainage trap. FIG. 3 is a vertical cross-sectional view showing one step of repair work for an existing drainage trap. FIG. 3 is a vertical cross-sectional view showing one step of repair work for an existing drainage trap. FIG. 3 is a vertical cross-sectional view showing one step of repair work for an existing drainage trap. FIG. 3 is a vertical cross-sectional view showing one step of repair work for an existing drainage trap. FIG. 2 is a vertical cross-sectional view showing how the drain pipe on the lower floor is connected to the existing drain trap after repair. It is a longitudinal cross-sectional view showing a modification of the inner trap. FIG. 7 is a vertical cross-sectional view showing a modification example of the use of the existing drainage trap after repair. It is a longitudinal cross-sectional view showing an example of modification of repair work of an existing drainage trap. FIG. 2 is a longitudinal cross-sectional view showing an existing drainage trap repaired using a conventional repair method.

[Embodiment 1]
Hereinafter, based on FIGS. 1 to 12, a resin inner trap 20 used for repairing an existing drain trap 10 according to Embodiment 1 of the present invention, and a method for repairing an existing drain trap 10 using the inner trap 20 will be described. I will explain about it. Here, the existing drain trap 10 according to the present embodiment is a cast iron drain trap used on the floor of a bathroom in an apartment complex.

<About the existing drainage trap 10>
Based on FIG. 3, the installation state of the existing drainage trap 10 will be explained. The existing drain trap 10 is a cast iron trap that guides water on the floor F of a bathroom in an apartment complex to a drain pipe on the lower floor, and as shown in FIG. There is. The structure is such that the water stored in the water sealing part W of the existing drain trap 10 prevents the odor from the drain pipe on the lower floor from flowing into the bathroom. The existing drain trap 10 includes a cylindrical upper housing part 13, a bottomed cylindrical lower housing part 14 provided under the upper housing part 13, and a disc-shaped lower housing part 14 that covers the upper end of the upper housing part 13. It includes an annular strainer support part 12 in which a strainer 11 is set.

As shown in FIG. 3, the lower housing part 14 is formed in a size that allows the lower part of the upper housing part 13 to be coaxially accommodated therein. In the upper part of the lower housing part 14, a plurality of female screw holes (numbers omitted) are formed in the circumferential direction to penetrate the side wall of the lower housing part 14 in the radial direction, and a fixing bolt is inserted into each female screw hole. 14s are screwed together. As a result, the lower part of the upper housing part 13 is housed in the lower housing part 14, and after adjusting the insertion dimension of the upper housing part 13 into the lower housing part 14, the fixing bolt 14s is tightened. The upper housing portion 13 can be fixed in place. Further, the lower housing portion 14 is provided with a water collection flange 14f formed to protrude outward in the radial direction below the fixing bolt 14s. Further, on the side wall of the lower housing part 14, an oblique passage 14x (so-called water drain hole) is formed above the water collecting flange 14f to guide water collected by the water collecting flange 14f into the lower housing part 14. .

As shown in FIG. 3, a vertical pipe portion 16 is provided on the bottom portion 14b of the lower housing portion 14, coaxially with the lower housing portion 14. The vertical pipe portion 16 is a vertical pipe for forming a water sealing portion W inside the lower housing portion 14, and water is stored in the water sealing portion W up to the upper end position of the vertical pipe portion 16 (see FIG. (See dotted line in Figure 3). A bell-shaped water-sealing cap 18 (so-called "dog") is placed over the vertical pipe portion 16 to ensure a flow path R. Further, a lower end connecting portion 17 is formed coaxially with the vertical pipe portion 16 under the bottom portion 14b of the lower housing portion 14. A lower floor drain pipe (not shown) is connected to the lower end connection portion 17 of the existing drain trap 10. As a result, the wastewater in the bathroom flows through the strainer 11 into the upper housing part 13 and the lower housing part 14, and then flows through the water sealing part W and the flow path R between the water sealing cap 18 and the vertical pipe part 16. It is guided inside the vertical pipe section 16. Then, the waste water in the vertical pipe section 16 flows into the drain pipe on the lower floor.

<About installing the drain trap 10>
In installing the drain trap 10, as shown in FIG. 3, the lower housing part 14 is first housed in the penetration part KSH of the floor slab KS, and the water collection flange 14f of the lower housing part 14 is set on the upper surface of the floor slab KS. be done. In this state, the upper surface of the floor slab KS and the upper surface of the water collection flange 14f are covered with the waterproof sheet S. Next, a presser mortar MS is poured onto the waterproof sheet S, and the drain trap 10 is buried in the presser mortar MS up to the vicinity of the strainer support portion 12. Then, the floor surface F of the bathroom is completed by laying tiles T on the surface of the holding mortar MS, and the upper surface of the strainer 11 of the drain trap 10 becomes flush with the floor surface F. When water leaks over time from the joints of the tiles T or cracks in the holding mortar MS due to use of the bathroom, the water is collected in the center by the water collection flange 14f of the drain trap 10, and is collected in the diagonal passage of the lower housing part 14. 14x leads to the inside of the lower housing part 14.

<About the inner trap 20 used for repairing the existing drainage trap 10>
As shown in FIGS. 1 and 2, the inner trap 20 is a portion of the existing drain trap 10 excluding the strainer support portion 12, the upper housing portion 13, and the lower housing portion 14, that is, the inner side of the existing drain trap 10. This is a component for updating all. The inner trap 20 is made of hard vinyl chloride, and, as shown in FIG. 1, includes a bottomed cylindrical housing portion 22 with an opening 22u at the upper end. The outer diameter of the housing part 22 is set to be slightly smaller than the inner diameter of the upper housing part 13 of the existing drain trap 10. That is, in order to secure the volume inside the housing part 22 while the outer diameter of the housing part 22 is limited, the wall thickness of the side wall of the housing part 22 is set smaller than that of other parts. Further, the axial length dimension (height dimension) of the housing section 22 is set to a value approximately equal to the dimension from the top surface of the bottom section 14b of the lower housing section 14 of the existing drainage trap 10 to the upper end of the upper housing section 13. ing.

As shown in FIG. 1, the inner trap 20 includes a vertical pipe section 24 that is provided coaxially with the housing section 22 so as to rise from the bottom 22b of the housing section 22. The vertical pipe portion 24 is a vertical pipe for forming a water sealing portion W inside the housing portion 22, and is fitted with a bell-shaped water sealing cap 18 while securing a flow path. Further, the inner trap 20 includes a lower end connecting portion 26 coaxially formed in a position below the bottom portion 22b of the housing portion 22 and communicating with the vertical pipe portion 16. As shown in FIG. 9, the lower end connecting portion 26 is a socket for connecting the vertical pipe portion 24 of the inner trap 20 and the drain pipe 5 on the lower floor. Here, the outer diameter of the vertical pipe portion 24 is set to a value equal to the outer diameter of the vertical pipe 5s of the drain pipe 5 inserted into the lower end connecting portion 26.

<About the procedure for repairing the existing drain trap 10 using the inner trap 20>
When repairing the existing drain trap 10, as shown in FIG. 3, the disk-shaped strainer 11 is first removed, and then the water sealing cap 18 is removed. Note that the strainer 11 and the water sealing cap 18 are reused after cleaning, if reusable. Next, as shown in FIG. 4, a cylindrical hole saw 30 (diamond hole saw) forming a through hole H (see FIG. 5, etc.) in the floor slab KS is connected to the upper housing part 13 and the lower housing part 14 of the existing drain trap 10. set coaxially. Here, the outer diameter of the cylindrical hole saw 30 is set smaller than the outer diameter of the inner trap 20. Further, the inner diameter of the cylindrical hole saw 30 is set larger than the outer diameter of the lower end connecting portion 17 of the existing drain trap 10. The cylindrical hole saw 30 is inserted into the upper housing part 13 and the lower housing part 14 of the existing drain trap 10. Then, by rotationally driving the cylindrical hole saw 30, as shown in FIGS. 4 and 5, the bottom 14b of the lower housing part 14 and the floor slab KS overlapping the bottom 14b are cut into a circular planar shape, and the through hole is cut into a circular shape. H is formed. As a result, as shown in FIG. 6, the vertical pipe portion 16 and lower end connecting portion 17 of the existing drain trap 10 are removed together with the inner portion of the through hole H.

Next, as shown in FIG. 6, an epoxy clay-like adhesive B is set in a ring shape on the upper surface of the remaining portion of the bottom portion 14b of the lower housing portion 14 of the existing drainage trap 10. Further, adhesive B is set in a ring shape on the inner wall surface of the upper housing part 13 and at the boundary between the lower end of the upper housing part 13 and the lower housing part 14 . In this state, as shown in FIGS. 6 to 8, the inner trap 20 is inserted into the upper housing part 13 and the lower housing part 14 from the upper end opening of the existing drain trap 10. As a result, as shown in FIG. 8, the lower corner portion of the bottom portion 22b of the housing portion 22 of the inner trap 20 is fixed to the remaining upper surface of the bottom portion 14b of the lower housing portion 14 and the lower part of the inner wall surface of the lower housing portion 14 using the adhesive B. be done. Further, the outer peripheral surface of the housing portion 22 of the inner trap 20 is similarly fixed to the inner wall surface of the upper housing portion 13 and the upper portion of the inner wall surface of the lower housing portion 14 using adhesive B. When the inner trap 20 is fixed to the upper housing part 13 and the lower housing part 14 of the existing drainage trap 10 in this way, the water sealing cap 18 is placed over the vertical pipe part 24 of the inner trap 20. Furthermore, the strainer 11 is set on the strainer support portion 12 of the existing drainage trap 10, and the repair of the existing drainage trap 10 is completed.

When the repair of the existing drain trap 10 is completed, as shown in FIG. 9, the drain pipe 5 on the lower floor is constructed. That is, the vertical pipe 5s constituting the drain pipe 5 on the lower floor is inserted and connected to the lower end connecting portion 26 of the inner trap 20 of the existing drain trap 10. Next, the lower end portion of the vertical pipe 5s is connected to the horizontal portion of the drain pipe 5 supported by the hanging support fitting 36 via the elbow joint 5e. After construction of the drain pipe 5 on the lower floor, mortar MD is filled from below inside the through hole H of the floor slab KS, and the lower end opening of the through hole H is closed with the closing plate 34, completing the piping work. .

<Correspondence of terms between the existing drainage trap according to this embodiment and the existing drainage trap according to the present invention>
The upper housing part 13 and the lower housing part 14 of the existing drain trap 10 according to the present embodiment correspond to the existing housing part of the present invention, the vertical pipe part 16 corresponds to the existing pipe part of the present invention, and the lower end connecting part 17 corresponds to the existing lower end connection portion of the present invention.

<About the advantages of the inner trap 20 according to this embodiment>
Inner trap 20 according to this embodiment, after removing vertical pipe part 16 (existing installed pipe part) and lower end connecting part 17 (existing lower end connecting part) of existing drain trap 10, upper housing part 13, lower housing part It is configured so that it can be set within 14 seconds. Here, the cylindrical hole saw 30 can be used as a method for removing the vertical pipe portion 16 (existing vertical pipe portion) and the lower end connecting portion 17 (existing lower end connecting portion) of the existing drain trap 10. That is, by coaxially passing the cylindrical hole saw 30 inside the upper housing part 13 and the lower housing part 14 of the existing drainage trap 10, and opening the through hole H in the floor slab KS at the position of the bottom part 14b of the lower housing part 14, The vertical pipe portion 16 (existing vertical pipe portion) and lower end connecting portion 17 (existing lower end connecting portion) of the existing drain trap 10 can be removed. After opening the through hole H, the inner trap 20 is inserted from above into the upper housing part 13 and the lower housing part 14 of the existing drain trap 10 and fixed, thereby completing the repair of the existing drain trap 10. Therefore, compared to methods such as repairing the inside of the existing drainage trap 10 by sandblasting, the effort required to repair the existing drainage trap 10 is significantly reduced. Furthermore, since the inner trap 20 is newly installed and made of resin, its durability is improved compared to a method in which the inner trap 20 is coated with metal after sandblasting.

Furthermore, since the inner trap 20 is made of hard vinyl chloride, it is resistant to corrosion and has high durability. Further, the outer diameter of the housing portion 22 of the inner trap 20 is set smaller than the inner diameter of the upper housing portion 13 and the lower housing portion 14 of the existing drain trap 10. Therefore, the inner trap 20 can be reliably housed inside the upper housing part 13 and the lower housing part 14 of the existing drain trap 10.

<Example of change>
Here, the present invention is not limited to the above-described embodiments, and modifications can be made within the scope of the invention. For example, in this embodiment, an example is shown in which hard vinyl chloride is used as the material for the inner trap 20. However, it is also possible to use soft vinyl chloride as the material for the inner trap 20 and to set the outer diameter of the housing portion 22 of the inner trap 20 to be larger than the inner diameter of the upper housing portion 13 of the existing drain trap 10. As a result, the housing part 22 of the inner trap 20 is elastically deformed inward in the radial direction and inserted into the upper housing part 13 and the lower housing part 14 of the existing drain trap 10, so that the housing part 22 of the inner trap 20 and the existing The gap between the upper housing part 13 and the lower housing part 14 of the drain trap 10 can be reduced. Further, it is also possible to use soft vinyl chloride only for the side wall of the housing portion 22 of the inner trap 20.

In addition, in this embodiment, as shown in FIG. 1, the wall thickness of the side wall of the housing portion 22 of the inner trap 20 is set smaller than other parts, and the outer diameter of the vertical pipe portion 24 is set to be smaller than that of the lower end connecting portion. An example is shown in which the outer diameter is set to be equal to the outer diameter dimension of the vertical pipe 5s of the drain pipe 5 inserted into the drain pipe 26. However, as shown in FIG. 10, it is also possible to set the outer diameter of the vertical pipe portion 24 of the inner trap 20 to be smaller than the outer diameter of the vertical pipe 5s of the drain pipe 5 inserted into the lower end connecting portion 26. be. Thereby, the outer diameter of the water sealing cap 18 that covers the vertical pipe portion 24 of the inner trap 20 can also be reduced. As a result, even if the wall thickness of the side wall of the housing section 22 of the inner trap 20 is the same as that of other parts, a sufficient flow path can be secured between the inner wall surface of the housing section 22 and the water sealing cap 18.

Moreover, in this embodiment, as shown in FIG. 9, an example is shown in which the existing drain trap 10 in the bathroom is used as the drain trap in the bathroom as it is even after repair. However, by making the outer diameter of the vertical pipe portion 24 of the inner trap 20 equal to the outer diameter of the vertical pipe 5s of the drain pipe 5, as shown in FIG. Can be used as a fitting. That is, when a unit bath (not shown) is installed in the old bathroom, by connecting the drain pipe 7 of the unit bath to the vertical pipe part 24 of the inner trap 20 with the straight joint 25, the drainage from the unit bath can be routed to the lower floor. It becomes possible to lead to the drain pipe 5. Further, as shown in FIG. 12, a through hole approximately equal to the diameter of the upper housing part 13 is formed inside the lower housing 14 using a large diameter cylindrical hole saw 30, and a large diameter inner trap is formed accordingly. A configuration in which 20 is set is also possible.

5... Drain pipe 10... Existing drain trap 13... Upper housing part (existing housing part)
14...Lower housing part (existing housing part)
14b...Bottom part 16...Vertical pipe part (already established pipe part)
17...Lower end connection part (existing lower end connection part)
18... Water sealing cap 20... Inner trap 22... Housing part 22u... Opening 22b... Bottom part 24... Vertical pipe part 26... Lower end connection part 30. ... Cylindrical hole saw F ... Floor surface H ... Through hole KS ... Floor slab R ... Channel W ... Water sealing part

Claims (6)

an existing housing part having a bottomed cylindrical shape that is buried in a floor slab of a building and receives drainage water on the floor surface through an opening at the upper end; and a water seal part that is coaxially provided inside the existing housing part to form a water sealing part; A bell-shaped water-sealing cap is provided on the pre-installed pipe portion to be covered with a flow path secured, and is provided coaxially with the pre-installed pipe portion under the bottom of the existing housing portion. A resin inner trap used for repairing an existing drain trap, comprising:
a bottomed cylindrical housing portion with an open top;
a cylindrical vertical pipe part that is provided coaxially inside the housing part to form a water sealing part, and is covered with a bell-shaped water sealing cap while securing a flow path;
It is provided coaxially with the vertical pipe section under the bottom of the housing section, and includes a lower end connecting section that connects the vertical pipe section and a drain pipe on a lower floor;
The outer diameter of the vertical pipe portion is set to a value equal to the outer diameter of the drain pipe on the lower floor that is inserted into the lower end connection portion,
The inner trap is configured such that the housing part can be stored in the existing housing part from the opening at the upper end in a state in which the existing drain pipe part and the existing lower end connecting part of the existing drainage trap are removed. The inner trap according to claim 1,
Hard vinyl chloride is used for the resin,
An inner trap, wherein the outer diameter of the housing portion is set to be smaller than the inner diameter of the existing housing portion of the existing drain trap. an existing housing part having a bottomed cylindrical shape that is buried in a floor slab of a building and receives drainage water on the floor surface through an opening at the upper end; and a water seal part that is coaxially provided inside the existing housing part to form a water sealing part; A bell-shaped water-sealing cap is provided on the pre-installed pipe portion to be covered with a flow path secured, and is provided coaxially with the pre-installed pipe portion under the bottom of the existing housing portion. A resin inner trap used for repairing an existing drain trap, comprising:
a bottomed cylindrical housing portion with an open top;
a cylindrical vertical pipe part that is provided coaxially inside the housing part to form a water sealing part, and is covered with a bell-shaped water sealing cap while securing a flow path;
It is provided coaxially with the vertical pipe section under the bottom of the housing section, and includes a lower end connecting section that connects the vertical pipe section and a drain pipe on a lower floor;
The housing part is configured to be able to be housed in the existing housing part from the opening at the upper end in a state where the existing drain pipe part and the existing lower end connection part of the existing drain trap are removed,
Soft vinyl chloride is used for the resin,
The outer diameter of the housing part is set larger than the inner diameter of the existing housing part of the existing drain trap, and the housing part is elastically deformed inward in the radial direction to be housed in the existing housing part. An inner trap. The inner trap according to claim 3 ,
In the inner trap, the outer diameter of the vertical pipe portion is set to be equal to the outer diameter of the drain pipe on the lower floor that is inserted into the lower end connection portion. A method for repairing an existing drainage trap using the inner trap according to any one of claims 1 to 4, comprising:
a preparation step of removing a bell-shaped water sealing cap placed over the already installed pipe portion of the existing drainage trap;
After the preparation step, a hole saw setting step of coaxially inserting a cylindrical hole saw having an inner diameter larger than an outer diameter of the existing lower end connection portion of the existing drain trap into the existing housing portion of the existing drain trap;
After the hole saw setting step, the cylindrical hole saw is rotationally driven to cut the bottom of the existing housing portion of the existing drain trap and the floor slab overlapping the bottom into a circular planar shape to form a through hole. a forming process;
After the through hole forming step, an adhesive setting step of setting an adhesive on the inner wall surface of the existing housing of the existing drain trap;
After the adhesive setting step, a trap fixing step of storing the inner trap in the existing housing portion of the existing drain trap and bonding the outer peripheral surface of the housing portion of the inner trap to the inner wall surface of the existing housing of the existing drain trap. and,
A method for repairing an existing drainage trap. A method for repairing an existing drainage trap according to claim 5, comprising:
A method for repairing an existing drainage trap, in which an epoxy clay-like adhesive is used as the adhesive.

Images