JP2015021319A - Renovation method of floor drain trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new renovation method of a floor drain trap, capable of repairing and renovating easily and surely even if an inside surface shape is complicated.SOLUTION: The new renovation method of a floor drain trap includes: a cutting step of cutting a straight pipe section 50, which extends from a drain trap body 10 embedded in a floor part to an under floor while penetrating through the floor part, at a prescribed position; a reproduction member fitting step of inserting a cylindrical thermoplastic reproduction member 200 from a cut part side of the straight pipe section 50 or from a rise-up part side of the trap body 10 into the straight pipe section 50, and holding the reproduction member 200 in a state that a tip of the reproduction member 200 protrudes from the rise-up part; a reproduction member heating/adhesion step of thermally expanding the reproduction member 200 to adhere it onto the inner faces of the rise-up part of the drain trap 10, the straight pipe section 50, and connection parts thereof; and a reproduction member end treatment step of treating the tip and the bottom edge of the reproduction member 200.

Description

  The present invention relates to a method for regenerating a floor drain trap installed on a floor surface of a bathroom or a washing place.

  In such a floor drain trap, when the sealing portion connected to the drain pipe is corroded or damaged, the sealing function by water is impaired, and malodors and bacteria flow backward from the sewage pipe side into the room, so that the indoor environment is remarkably deteriorated. If the floor drain trap does not function sufficiently in this way, it is necessary to replace the floor drain trap with a new one, but the existing drain trap is installed so that its body is buried on the floor. Since there are many cases, it is necessary to hang concrete and recycle waterproofing work, which requires a large amount of work.

  For this reason, it is desirable to repair and regenerate the part that has become non-functional rather than to replace the entire drain trap, and various repair / regeneration methods have been proposed. For example, in Patent Literature 1 below, a cloth material impregnated with a curable resin is attached to the inner surface of a trap or a pipe, and the drained trap or the drain pipe is regenerated by curing the impregnated curable resin.

  However, this construction method is difficult to apply to cases where the sealing portion of the drain trap is severely damaged such that the sealing portion is corroded and broken and the sealing effect is lost. Therefore, for example, in Patent Document 2 below, the entire rising portion of the corroded / damaged water-sealed portion is cut off and removed from the root by an electric cutter, and then the inside of the drain trap is cleaned and rust-proofed. A repair member formed of a cylindrical body is attached so as to be inserted into a drain pipe, and a rising portion or the like is regenerated.

JP 2004-316404 A JP 2012-117237 A

  However, the conventional drain trap repairing method as described above takes time and effort because the corroded or damaged rising portion is cut off from the root by an electric cutter. In addition, since a plastic cylinder with a stopper having a smaller diameter than this is inserted into the drain pipe from above the drain trap, there may be a large gap between the cylinder and the straight pipe portion.

  In other words, the inner surface shape (hole diameter) of the connecting part with the rising part of the existing drain trap and the straight pipe part of the drain outlet is often complicated and not constant, so a plastic cylinder inserted from the trap body side The diameter of must be matched to the smallest hole diameter on the inner surface. Therefore, it is considered that a large gap is generated between the plastic cylinder and the straight pipe portion, and corrosion proceeds from here.

  It is also conceivable to apply an adhesive to the outer surface of the plastic cylinder or the inner surface of the connecting portion with the straight pipe portion to fill the gap or to cut the inner surface to make the inner diameter uniform. Neither method is sufficient, and it takes a lot of trouble.

  Accordingly, the present invention has been devised to solve these problems, and its purpose is to provide a novel method for regenerating a floor drain trap that can be easily and reliably repaired and regenerated even if the inner surface shape is complex. It is to provide.

  In order to solve the above-mentioned problem, the first invention includes a straight pipe section cutting step of cutting a straight pipe section extending through the floor section and extending under the floor from a trap body embedded in the floor section at a predetermined position, Regeneration in which a tubular regenerative member made of a thermoplastic resin is inserted into the straight pipe from the cutting part side or the rising part side of the trap body, and the front end of the regenerating member protrudes from the rising part A member mounting step, a regeneration member heating and adhesion step in which the regeneration member is heated and expanded to closely contact the inner surface of the straight pipe portion and the rising portion and their connecting portions, and a regeneration member end for processing the leading end and the bottom end of the regeneration member A floor drain trap regeneration method characterized by comprising a partial treatment step.

  According to such a regeneration method, the thermoplastic regeneration member inserted into the straight pipe portion is heated and expanded so as to be brought into close contact with the inner face of the straight pipe portion, the rising portion, and the connecting portion thereof. Even if the shape is complicated, these parts can be completely covered and protected by this reproducing member with almost no gap.

  A second invention is a regeneration method for a floor drain trap according to the first invention, wherein the regeneration member is made of a plastic pipe that has been processed in advance from the rising portion of the trap body to the inner diameter of the straight pipe portion. As described above, if the plastic pipe previously processed according to the inner diameter of the straight pipe portion from the rising portion of the trap body is used as the regenerating member, the straight pipe portion and the drainage can be obtained by heating in a short time while maintaining a uniform thickness. It can be easily and reliably brought into close contact with the rising portions of the traps and the inner surfaces of the connecting portions. In addition, since plastic has excellent corrosion resistance and oil resistance, it can be protected over a long period of time.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the regeneration member end portion treatment step is performed from the inside to the outside so as to cover the bottom end portion of the straight pipe portion after the lower end of the regeneration member is heated and softened. This is a method for reclaiming floor drainage traps that includes reversing. By performing such a rewinding treatment, not only the inner surface of the straight pipe portion but also the cut end portion of the straight pipe portion which is easily corroded can be easily and reliably protected.

  According to a fourth aspect of the present invention, in the first to fourth aspects of the present invention, the regeneration member end portion treatment step is performed by heating and softening the upper end of the regeneration member and then rolling up from the inside to the outside so as to cover the upper end portion of the rising portion. This is a method for reclaiming floor drainage traps that includes reversing. By performing such a fluffing process, not only the inner surface of the rising portion but also the leading end portion of the rising portion that easily corrodes can be easily and reliably protected.

  According to a fifth aspect of the present invention, in the first to fourth aspects of the invention, in the regeneration member end portion processing step, when a part or all of the rising portion is missing, the height of the upper end of the regeneration member is the rising portion. This is a method for regenerating a floor drain trap, which includes a process of placing a putty around the regenerating member so as to fill a deficient portion of the rising portion after being processed or adjusted so as to substantially match the original height.

  By performing such putty process, even if a part or all of the rising part is missing, it can be easily repaired and reproduced without removing the part.

  According to the regeneration method of the present invention, the thermoplastic regeneration member inserted into the straight pipe portion is heated and expanded so as to be in close contact with the straight pipe portion and the rising portion of the drain trap and the inner surface of the connection portion thereof. Even if the shape of the inner surface is complicated, it is possible to cover and protect these portions almost completely without any gaps by this reproducing member.

It is sectional drawing which shows an example of the existing floor drain trap 100 to which this invention construction method is applied. It is sectional drawing which shows an example of the aged trap main body. It is a flowchart figure which shows the flow of a process of this invention construction method. 4 is a cross-sectional view showing an example of cutting the straight pipe portion 50 of the floor drain trap 100. FIG. It is a conceptual diagram which shows the grinding | polishing process inside the floor drain trap 100. FIG. It is explanatory drawing which shows the attachment process of the reproduction | regeneration member 200 to the floor drain trap 100. FIG. It is a perspective view which shows an example of the reproduction | regeneration member 200. FIG. It is explanatory drawing which heat-processes the reproduction | regeneration member 200 with a hot air. 4 is a cross-sectional view showing a state in which the reproduction member 200 is in close contact with the inner surface of the straight pipe portion 50 and the like. FIG. FIG. 5 is a conceptual diagram showing a lower end processing step of the reproduction member 200. FIG. 4 is a conceptual diagram showing a regeneration process of a rising portion 30. It is sectional drawing which shows an example of the floor drain trap 100 which the reproduction | regeneration processing was complete | finished. FIG. 5 is a conceptual diagram showing an upper end portion processing step of the reproduction member 200.

  Next, the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an example of an existing floor drain trap 100 to which the method of the present invention can be applied. As shown in the figure, this floor drain trap 100 is installed so as to be embedded in a concrete floor 110 constituting a floor surface of a bathroom or a washing place, and collects water flowing on the waterproof layer 120 on the floor surface. It is made to flow through the drain pipe 130.

  The floor drain trap 100 is formed of a metal casting or the like, and has a bowl-shaped trap body 10 that is open at the top, a drain port 20 that is formed so as to penetrate the center of the trap body 10, and A cylindrical rising portion 30 provided at the edge of the drain port 20, a housing 40 attached to cover the rising portion 30 from above, and a screw to the drain port 20 so as to be continuous with the rising portion 30. It is mainly comprised from the straight pipe part 50 screwed together by this and extended below this.

  The trap body 10 has an upper end that is substantially the same height as or lower than the floor surface, and is installed so that all of the water that has flowed down into the drainage channel 120 flows into the trap body 10. A mesh-shaped eye plate 80 is detachably attached to the opening of the trap body 10. The rising portion 30 is formed of a cylindrical body that extends upward from a drain port 20 formed in the center of the trap body 10, and the height thereof is at least lower than the upper end portion of the trap body 10.

  The casing 40 is formed in a bowl shape whose diameter is sufficiently larger than the diameter of the rising portion 30, and is attached so as to cover the upper end portion of the rising portion 30 with the opening portion facing downward. A plurality of ribs 41 extending radially in the center of the casing 40 are provided on the inner side of the casing 40 in the circumferential direction, and a predetermined gap is always formed around the rising portion 30 when attached to the rising portion 30. It has come to be. In the figure, reference numeral 42 denotes a knob for attaching and detaching the housing 40. The housing 40 and the rising portion 30 constitute a sealed portion.

  The straight pipe portion 50 is detachably screwed with the upper end of the straight pipe portion 50 with a screw, and the lower end portion extends vertically downward from the drain outlet 20 of the trap body 10 so as to penetrate the concrete floor 110. The drain port 20 and the drain pipe 130 are connected to each other. Further, as shown in the drawing, since the inner diameter of the straight pipe portion 50 is different from the inner diameter of the drain port 20 and the inner diameter of the rising portion 30, a tapered step portion 60 is formed at the connecting portion.

  And, in the existing floor drain trap 100 having such a configuration, when the amount of water flowing into the trap body 10 increases and the height reaches the upper end of the rising portion 30, it overflows. It flows into the rising part 30, passes through the straight pipe part 50, flows into the drain pipe 130 and is drained. At this time, the opening of the rising portion 30 is always in a state of being blocked by water accumulated in the housing 40 and the trap body 10 (water seal). Does not flow back into the room from the rising portion 30.

  The existing floor drain trap 100 having such a configuration generally undergoes corrosion due to rust or the like when 10 to several decades have passed since installation, and in the worst case, as shown in FIG. A part may be lost and the water sealing function may be lost. Further, the threaded portion of the straight pipe portion 50 is corroded to form a gap S, and a part of the drainage may leak from the gap S.

  Therefore, the construction method of the present invention is a method of regenerating the floor drain trap 100 when the floor drain trap 100 is in such a state, or by performing the repair described below before that. And FIG. 3 shows an example of the flow of the processing process of this invention construction method, and FIG. 4 thru | or FIG. 13 shows the concept of each of these processing processes. The method of the present invention will be described below with reference to these drawings.

  First, as shown in step S100 of FIG. 3, after a blue sheet or the like is laid on the floor in the bathroom where the floor drain trap 100 to be treated is provided and the area around the floor drain trap 100 is cured, After removing the housing 40, the water accumulated in the trap body 10 is sucked up with a dropper or the like, and the inside of the trap body 10 is wiped clean with a waste cloth.

  Next, as shown in step S <b> 102 and FIG. 4, the drain pipe 130 is exposed from below the floor or downstairs, and then the straight pipe portion 50 is cut horizontally from the connection portion of the drain pipe 130 to remove the drain pipe 130. Next, as shown in step S104 and FIG. 5, the inside of the trap body 10 and the inner surfaces of the rising portion 30 and the straight pipe portion 50 are polished to scrape away corroded portions such as rust. This polishing operation is performed carefully using a polishing apparatus 70 such as a flathead screwdriver, a rod sander, or an HD tool.

  Next, as shown in step S <b> 106 and FIG. 6, the tubular regeneration member 200 is inserted into the straight pipe portion 50 from the cut portion side of the straight pipe portion 50 and attached. The reproduction member 200 is formed of a thermoplastic plastic pipe or the like. In the present embodiment, as shown in FIG. 7, the regeneration member 200 has a large shape having a large diameter portion 210, a small diameter portion 220, and a tapered portion 230. That is, the inner surface shape of the rising portion 30 and the straight pipe portion 50 is substantially similar. The regeneration member 200 may be inserted from the opening (upper end) side of the rising portion 30.

  The recycled member 200 is formed of a thermoplastic resin (polymer), and has a property of expanding in the radial direction (large in diameter) when heat is applied, and has a property of maintaining the shape as it is after cooling after heating. ing. When attaching the regenerating member 200, it is desirable to dry the inside sufficiently by sending hot air into the straight pipe portion 50 in advance.

  Then, as shown in the next step S108 and FIG. 8, the upper and lower ends of the regenerating member 200 are maintained so that the upper end of the reproducing member 200 protrudes from the tip of the rising portion 30 by a predetermined amount (for example, several mm to several cm). Hot air of several hundred degrees Celsius is sent into the regenerating member 200 from either one. Then, the regenerating member 200 is deformed so as to expand and firmly adheres to the inner surfaces of the rising portion 30 and the straight pipe portion 50 as shown in FIG.

  Thereafter, as shown in steps S110 and S112, the end portion of the reproduction member 200 is processed. Specifically, first, as shown in FIGS. 10 (A) and 10 (B), the lower end portion of the reproduction member 200 exposed from the lower end portion of the straight pipe portion 50 is heated and softened at a stretch by 180 ° outward by hand. The lower end portion of the straight pipe portion 50 is covered by reversing it so that it is raised. Thereafter, as shown in FIG. 3C, a portion of the straight pipe portion 50 that is beaten on the outside is scraped with a grinder or the like to remove the protrusion.

  Next, as shown in FIG. 11 (A), when the protruding amount of the upper end portion of the reproducing member 200 is large, the upper end position is made substantially the same as the original height of the rising portion 30 by cutting the upper end. Then, the upper end is heated and plastically processed into a trumpet shape so as to spread outward slightly as shown in FIG. Thereafter, as shown in FIG. 3C, the rising portion 30 that has been lost by placing the epoxy resin P around the reproduction member 200 is regenerated so as to have the original shape so as to fill the missing portion of the rising portion 30. .

  When the epoxy resin P is sufficiently dried, a coating agent such as an epoxy resin is applied to the surface (inside) of the trap body 10 as shown in the next step S114 and FIG. A protective layer C is formed. When this protective layer C is sufficiently dried, the housing 40 is set on the rising portion 30 as shown in FIG. 12, and then water is allowed to flow as shown in step S116 to perform a trap function test. And if this inspection is passed, as shown in the last step S118, the drain pipe 130 is connected to the straight pipe section 50, and the work is completed by removing the installation of the eye plate 80, curing, and the like.

  According to such a method for regenerating a floor drain trap according to the present invention, a regeneration member 200 made of a thermoplastic plastic pipe processed in advance in accordance with the inner diameter of the rising portion 30 or the straight pipe portion 50 is used. Since the straight pipe part 50 and the rising part 30 are attached so as to be in close contact with the inner surfaces of the connecting parts, even if the inner surface shape is complicated, the reproducing member 200 completely removes the parts without any gaps. Can be covered and protected. In addition, by processing the plastic pipe in advance according to the inner diameter of the rising portion 30 and the straight pipe portion 50, the plastic pipe can be expanded and brought into close contact by heating in a short time while maintaining a uniform thickness. Furthermore, since the plastic (polymer) has excellent corrosion resistance, oil resistance, etc., it can maintain these functions over a long period of time and protect them.

  In addition, by subjecting the cut end portion of the straight pipe portion 50 to rewinding by the regenerating member 200, not only the inner surface of the straight pipe portion 50 but also the cut end portion of the straight pipe portion 50 that is easily corroded can be protected easily and reliably. be able to. Further, since the putty is formed around the reproducing member 200 so as to fill the missing portion of the rising portion 30, even if a part or all of the rising portion 30 is missing, it remains without being removed. It can be easily repaired and regenerated using the part effectively.

  Further, when there is no large defect in the rising portion 30 as described above, the portion protruding from the upper end of the rising portion 30 of the regenerating member 200 is heated as in the lower end portion of the straight pipe portion 50 as shown in FIG. After being softened, the portion is inverted (flipped) 180 ° downward so as to be turned outward. Thereby, not only the straight pipe part 50 but also the upper end part of the rising part 30 can be easily and reliably protected.

DESCRIPTION OF SYMBOLS 100 ... Drain trap 110 ... Floor 120 ... Drain channel 130 ... Drain pipe 200 ... Regeneration member 10 ... Trap main body 20 ... Drain port 30 ... Rising part 40 ... Housing 41 ... Rib 42 ... Knob part 50 ... Straight pipe part 60 ... Step Part 70: Polishing device 80 ... Eye plate C ... Protective layer P ... Epoxy resin

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the regeneration member end portion treating step is a brim that extends from the inside to the outside so as to cover the top end portion of the rising portion after heat softening the top end of the regeneration member. This is a method for reclaiming floor drainage traps that includes return processing. By performing such a fluffing process, not only the inner surface of the rising portion but also the leading end portion of the rising portion that easily corrodes can be easily and reliably protected.

Claims (5)

A straight pipe section cutting step of cutting a straight pipe section extending through the floor section from the trap body embedded in the floor section and extending under the floor at a predetermined position;
A cylindrical regenerative member made of thermoplastic resin is inserted into the straight pipe portion from the cutting portion side or the trap body rising portion side, and held in a state where the tip of the regenerating member protrudes from the rising portion. A regenerative member mounting step;
A regenerative member heating adhesion process in which the regenerative member is heated and expanded to closely contact the inner surface of the straight pipe portion and the rising portion and their connection parts;
A regeneration member end portion treating step for treating a front end and a lower end of the regeneration member.   2. The method for regenerating a floor drain trap according to claim 1, wherein the regeneration member is made of a plastic pipe that has been processed in advance from the rising portion of the trap body to the inner diameter of the straight pipe portion.   3. The floor according to claim 1, wherein the regeneration member end treatment step includes a flaking process that is performed from the inside to the outside so as to cover the bottom end of the straight pipe portion after heating and softening the bottom end of the regeneration member. Wastewater trap recycling method.   5. The reclaiming member end portion processing step includes a rewinding process in which the upper end of the regenerating member is heated and softened and then rolled up from the inside to the outside so as to cover the upper end portion of the rising portion. Regeneration method of floor drain trap as described.   In the regenerating member end processing step, when a part or all of the rising portion is missing, the height of the upper end of the regenerating member is processed or adjusted so as to substantially match the original height of the rising portion. The method for regenerating a floor drain trap according to any one of claims 1 to 4, further comprising a process of assembling a resin around the regenerating member so as to fill a missing portion of the rising portion.

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