Water drainage piping device

Abstract

To provide a drain piping device capable of coping with even the case where the thickness of the rising part of a foundation is different.SOLUTION: In a drain piping device 11 that communicates the space enclosed by a rising part 3 of a foundation concrete 1 of a building with the exterior of the foundation concrete 1, the lengths between both end openings of the drain piping device 11, that is, the lengths from an inflow port 13A as one end opening of an inner sleeve pipe 11B to an outflow port 13B as the other end opening of an outer sleeve pipe 11A can be changed according to the thicknesses of the rising part 3, making it possible to accommodate vertical tops with different foundation thicknesses without preparing multiple types of drainage pipes of different lengths.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a water drainage piping device for draining water accumulated in the foundation of a building to the outside. [Background technology]

[0002] Conventionally, it has been proposed to install a drainage pipe that passes through the rising part of a foundation formed by a slab foundation method or the like, so that when water accumulates in the space surrounded by the rising part of the foundation, the water can be discharged to the outside through the drainage pipe (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-207499 [Patent Document 2] Japanese Patent Application Publication No. 2020-66941 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, the thickness of the rising part of the foundation is 120 mm or more, but it can be 150 mm, 160 mm, or even thicker depending on the housing manufacturer and the specifications of the house. For this reason, it is necessary to manufacture drainage pipes of a length that corresponds to each thickness, and if the thickness of the rising part of the foundation is too large for the length of the existing drainage pipe, it is necessary to process the existing length of drainage pipe on site.

[0005] The present invention has been made in view of the above-mentioned problems, and has as its object to provide a drainage piping device that can be adapted to different thicknesses of the rising part of the foundation. [Means for solving the problem]

[0006] In order to solve the above problem, the drainage piping device of claim 1 of the present invention is as follows: A drainage piping device that connects a space surrounded by the rising part of a building foundation with the outside of the foundation, The length between the openings at both ends of the drainage piping device can be changed depending on the thickness of the rising portion. the law of nature, A closing member for closing the external opening is attached to the opening, and the closing member has an engaging portion that engages with the inner surface of the pipe and a sealing member that contacts the inner surface of the pipe, and when the engaging portion is engaged, the sealing member contacts the inner surface of the pipe over a predetermined range on the external opening side beyond the range where it engages with the inner surface of the pipe. It is characterized by the following. According to this feature, the length between the openings at both ends of the drainage piping device can be changed depending on the thickness of the rising part of the foundation, so that it is possible to accommodate rising parts of foundations of different thicknesses without having to prepare multiple types of drainage piping of different lengths. In addition, this feature can prevent pests from entering through the exterior opening and can also prevent the closure of the exterior opening by the closure member from being easily released. Furthermore, this feature can prevent the exterior surface of the foundation from being decoratively treated, and by increasing the thickness from the exterior opening to the exterior surface of the foundation or the decorative surface when decoratively treated, the sealing member can come into contact with the inner surface of the pipe even if the engaging portion of the closure member cannot be engaged all the way. Claims of the invention 2 The drainage piping device of claim 1 The water drainage piping device according to the closure member includes a flange; The flange has an outer diameter larger than the outer diameter of the outer opening, and has an inclined surface that is inclined toward the attachment direction to the outer opening so that the flange becomes thinner from the center side to the outer edge side. It is characterized by the following. This feature improves the design when the closure member is attached, and also improves the design because when the closure member is attached, the flange portion overlaps the outer surface of the foundation around the external opening or the decorative surface if decorative treatment has been applied. Claims of the invention 3 The drainage piping device of claim 1 or 2 The water drainage piping device according to When the pipe is placed at a predetermined angle, the end face of the external opening is vertical. It is characterized by the following. According to this feature, when the pipe body is installed with a predetermined angle inclination, the outer surface of the foundation and the end face of the exterior opening can be aligned. Claims of the invention 4 The drainage piping device of claim 1 to 3 The water drainage piping device according to any one of the above, The tube is provided with an elastic member or a non-vulcanized member containing an anti-termite agent on the outer circumferential surface of the tube. It is characterized by the following. According to this feature, no gaps are formed between the concrete foundation and the pipe body, preventing the intrusion of pests and the like through the gaps and enhancing the anti-termite effect.

[0007] Claims of the invention 5 The drainage piping device of claim 1 to 4 The water drainage piping device according to any one of the above, It consists of multiple pipes that overlap each other, The length between the openings at both ends of the drainage piping device can be changed by changing the overlapping range of the pipes. It is characterized by the following. According to this feature, the length between the openings at both ends of the drainage piping device can be changed by changing the overlapping range of the pipe bodies.

[0008] Claims of the invention 6 The drainage piping device of claim 1 to 4 The water drainage piping device according to any one of the above, It consists of multiple tubes, The length between the openings at both ends of the drainage piping device can be changed by connecting the pipes together. It is characterized by the following. According to this feature, by connecting the pipe bodies together, the length between the openings at both ends of the drainage piping device can be changed. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view showing an underfloor drainage structure using a drainage piping device according to a first embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view showing the configuration of the drainage piping device. [Figure 3] FIG. 2 is an exploded perspective view showing the internal structure of the drainage piping device excluding the cover member. [Figure 4] FIG. 3 is a cross-sectional view showing the internal structure of the drainage piping device. [Figure 5] 10 is an enlarged cross-sectional view showing the engagement between the recessed groove of the outer sleeve pipe and the ridge of the inner sleeve pipe. FIG. [Figure 6] 10(a) and 10(b) are cross-sectional views showing an example of changing the overlap length dimension. [Figure 7] 1(a) to 1(c) are diagrams showing an example of construction of an underfloor drainage structure using a drainage piping device. [Figure 8] 1A is a cross-sectional view showing a state in which the cover member is attached to the outer sleeve tube, and FIG. 1B is a cross-sectional view showing a state in which the cover member is attached to the outer sleeve tube after decorative treatment. [Figure 9] FIG. 10 is a vertical cross-sectional view showing the internal structure of a drainage piping device according to a first modified example of the present invention. [Figure 10] FIG. 10 is an exploded perspective view showing the configuration of a drainage piping device according to a second embodiment of the present invention. [Figure 11] FIG. 11 is a cross-sectional view showing the internal structure of the drainage piping device of FIG. [Figure 12] 10(a) to 10(c) are cross-sectional views showing an example in which the length of the drainage path is changed. [Figure 13] 1A is a cross-sectional view showing a state in which the cover member is attached to the outer sleeve tube, and FIG. 1B is a cross-sectional view showing a state in which the cover member is attached to the outer sleeve tube after decorative treatment. [Figure 14] 10(a) is a cross-sectional view showing a state in which a lid member according to a second modified example of the present invention is attached to a main tube, and FIG. 10(b) is a cross-sectional view showing a state in which the lid member is attached to a main tube after decorative treatment. [Figure 15] (a) is a cross-sectional view showing the state in which an engagement pipe as variant 3 of the present invention is connected to a main pipe, (b) is a cross-sectional view showing the state in which an engagement pipe as variant 4 of the present invention is connected to a main pipe, and (c) is a cross-sectional view showing the state in which an engagement pipe as variant 5 of the present invention is connected to a main pipe. [Figure 16] FIG. 6(a) is a perspective view showing the configuration of a drainage piping device as a sixth modified example of the present invention, and FIGS. 6(b) and 6(c) are cross-sectional views showing the state in which the length of the drainage path is changed by changing the engagement mode of the engagement pipe. [Figure 17] (a) is a cross-sectional view showing the configuration of a water drain piping device as modified example 7 of the present invention, and (b) and (c) are cross-sectional views showing the state in which the engagement mode of the engagement pipe is changed to change the length dimension of the drainage path. [Figure 18] 10(a) and 10(b) are vertical cross-sectional views showing modified shapes of the drainage piping device. [Figure 19] FIG. 10 is a diagram showing the drainage piping device installed with a slope. DETAILED DESCRIPTION OF THE INVENTION

[0010] [Form 1] Form 1 is a drainage piping device that connects a space surrounded by a rising part of a building foundation with the outside of the foundation, The length between the openings at both ends of the drain pipe device can be changed depending on the thickness of the rising portion. It is characterized by the following. According to this feature, the length between the openings at both ends of the drainage piping device can be changed depending on the thickness of the rising part of the foundation, so that it is possible to accommodate rising parts of foundations of different thicknesses without having to prepare multiple types of drainage piping of different lengths.

[0011] [Form 2] A second aspect is the drainage piping device according to the first aspect, It consists of multiple pipes that overlap each other, The length between the openings at both ends of the drainage piping device can be changed by changing the overlapping range of the pipes. It is characterized by the following. According to this feature, the length between the openings at both ends of the drainage piping device can be changed by changing the overlapping range of the pipe bodies.

[0012] [Form 3] A third aspect is the drainage piping device according to the first aspect, The overlapping range can be changed by sliding one tube relative to the other. It is characterized by the following. According to this feature, the overlapping range can be changed with a simple operation.

[0013] [Form 4] A fourth aspect is the drainage piping device according to the third aspect, a locking portion that can lock the one pipe body to the other pipe body, The locking portion includes a plurality of locking portions with different overlapping ranges. It is characterized by the following. According to this feature, by engaging one pipe body with the other pipe body at an engaging portion that corresponds to the thickness of the raised portion of the foundation, it is possible to prevent misalignment between the one pipe body and the other pipe body.

[0014] [Form 5] A fifth aspect is the drainage piping device according to the fourth aspect, The locking portion has a locking force in a direction to increase the overlapping range that is greater than a locking force in a direction to decrease the overlapping range. It is characterized by the following. This feature makes it possible to prevent the length from becoming shorter than the set length during construction.

[0015] [Form 6] A sixth aspect is the drainage piping device according to the second aspect, One tube is screwed onto the other tube, The overlapping range can be changed by rotating one of the pipes relative to the other pipe. It is characterized by the following. According to this feature, the overlapping range can be changed with a simple operation.

[0016] [Form 7] A seventh aspect is the drainage piping device according to any one of the second to sixth aspects, A finger hook is provided on at least one end of the one tube body or the other tube body. It is characterized by the following. This feature makes it easy to change the overlapping range.

[0017] [Form 8] Aspect 8 is the water drainage piping device according to aspect 1, It consists of multiple tubes, The length between the openings at both ends of the drainage piping device can be changed by connecting the pipes together. It is characterized by the following. According to this feature, by connecting the pipe bodies together, the length between the openings at both ends of the drainage piping device can be changed.

[0018] [Form 9] A ninth aspect is the drainage piping device according to the eighth aspect, The plurality of pipe bodies include a main pipe and a connecting pipe, The connecting pipe can be connected to the main pipe. It is characterized by the following. According to this feature, by connecting the connecting pipe to the main pipe, the length between the openings at both ends of the drain pipe device can be changed.

[0019] [Form 10] A tenth aspect is the drainage piping device according to the ninth aspect, The connecting pipe can be connected to the connecting pipe. It is characterized by the following. According to this feature, not only can a connecting pipe be connected to the main pipe, but also a connecting pipe can be connected to another connecting pipe, thereby making it possible to accommodate three or more different lengths.

[0020] [Form 11] An eleventh aspect of the present invention is a drainage piping device according to any one of the second to tenth aspects, An elastic member or a non-vulcanized member is provided on the outer peripheral surface of the tube body. It is characterized by the following. According to this feature, no gaps are formed between the concrete foundation and the pipe body, and it is possible to prevent the intrusion of pests and the like through the gaps.

[0021] [Form 12] A twelfth aspect is the drainage piping device according to the eleventh aspect, The elastic member or the non-vulcanized member contains an anti-termite agent. It is characterized by the following. This feature can enhance the anti-termite effect.

[0022] [Form 13] A thirteenth aspect is the drainage piping device according to the eleventh or twelfth aspect, The elastic member or the non-vulcanized member is provided so as to cover at least the outer end portion or the vicinity of the outer end portion of the outer peripheral surface of the tube body. It is characterized by the following. This feature effectively prevents the intrusion of pests and the like.

[0023] [Form 14] A fourteenth aspect is the drainage piping device according to the thirteenth aspect, The elastic member or the non-vulcanized member is a first member and a second member having a lower hardness than the first member; The first member is provided at or near the outer end of the outer peripheral surface of the tube, and the second member is provided on the inner side of the first member. It is characterized by the following. According to this feature, by providing a first member having a relatively high hardness at or near the outer end, it is possible to prevent the elastic member or non-vulcanized member from leaking out, while by providing a second member having a relatively low hardness further inward than the first member, it is possible to reliably prevent gaps from occurring between the foundation concrete and the pipe body.

[0024] [Form 15] A fifteenth aspect is the drainage piping device according to any one of the first to fourteenth aspects, A closing member is attached to the exterior opening to close the opening. It is characterized by the following. This feature makes it possible to prevent pests and the like from entering through the exterior opening.

[0025] [Form 16] A sixteenth aspect is the drainage piping device according to the fifteenth aspect, the closure member includes a flange; The flange has an inclined surface that is inclined toward the mounting direction to the exterior opening so that the flange becomes thinner from the center side to the outer edge side. It is characterized by the following. This feature improves the design when the closing member is attached.

[0026] [Form 17] A seventeenth aspect is the drainage piping device according to the fifteenth or sixteenth aspect, the closure member includes a flange; The outer diameter of the flange is larger than the outer diameter of the outer opening. It is characterized by the following. According to this feature, when the closure member is attached, the flange portion overlaps the outer surface of the foundation around the exterior opening or the decorative surface if decorative treatment is applied, thereby improving the design.

[0027] [Form 18] Aspect 18 is the drainage piping device according to any one of aspects 15 to 17, The closing member has a threaded portion that is threadedly engaged with the inner circumferential surface of the pipe. It is characterized by the following. According to this feature, it is possible to prevent the exterior opening from being easily unclosed by the closing member.

[0028] [Form 19] A nineteenth aspect is the drainage piping device according to the eighteenth aspect, the closing member includes a sealing member that contacts the inner circumferential surface of the pipe; When the threaded portion is screwed, the sealing member contacts the inner peripheral surface of the pipe over a predetermined range closer to the outer opening than the range where the sealing member is screwed onto the inner peripheral surface of the pipe. It is characterized by the following. According to this feature, a decorative treatment is applied to the outer surface of the foundation, and the thickness from the external opening to the outer surface of the foundation or the decorative surface when decorative treatment is applied is increased, so that the sealing member can come into contact with the inner surface of the pipe even if the threaded portion of the closure member cannot be threaded all the way in.

[0029] [Form 20] A 20th aspect is the drainage piping device according to the 18th aspect, the closing member includes a sealing member that contacts the inner circumferential surface of the pipe; When the threaded portion is screwed, the sealing member contacts the inner peripheral surface of the pipe over a predetermined range inside the range where the sealing member is screwed onto the inner peripheral surface of the pipe. It is characterized by the following. According to this feature, a decorative treatment is applied to the outer surface of the foundation, and the thickness from the external opening to the outer surface of the foundation or the decorative surface when decorative treatment is applied is increased, so that the sealing member can come into contact with the inner surface of the pipe even if the threaded portion of the closure member cannot be threaded all the way in.

[0030] [Form 21] A twenty-first aspect is the drainage piping device according to any one of the first to twenty aspects, When the pipe is placed at a predetermined angle, the end face of the external opening is vertical. It is characterized by the following. According to this feature, when the pipe body is installed with a predetermined angle inclination, the outer surface of the foundation and the end face of the exterior opening can be aligned.

[0031] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the drainage piping device according to the present invention will be described based on examples. [Example]

[0032] A drainage piping device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 8. FIG. 1 is a cross-sectional view showing an underfloor drainage structure using the drainage piping device according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view showing the configuration of the drainage piping device. FIG. 3 is an exploded perspective view showing the internal structure of the drainage piping device excluding the cover member. FIG. 4 is a cross-sectional view showing the internal structure of the drainage piping device. FIG. 5 is an enlarged cross-sectional view showing the engagement between the recessed groove portion of the outer sleeve pipe and the protruding rib portion of the inner sleeve pipe. FIGS. 6(a) and 6(b) are cross-sectional views showing an example of changing the overlap length dimension. FIG. 7(a) to 7(c) are diagrams showing an example of construction of an underfloor drainage structure using the drainage piping device. FIG. 8(a) is a cross-sectional view showing a state in which the cover member is attached to the outer sleeve pipe, and FIG. 8(b) is a cross-sectional view showing a state in which the cover member is attached to the outer sleeve pipe after decorative treatment.

[0033] [Configuration of the water drainage piping device 11] As shown in FIG. 1 , the concrete foundation 1 (foundation) of this embodiment, which serves as the underfloor structure of a building such as a house, is primarily composed of reinforcement and concrete and is a so-called slab foundation consisting of a base concrete portion 2 (floor slab) and a rising portion 3 erected on the periphery of the base concrete portion 2. Multiple reinforcing bars (not shown) are arranged crisscrossing each other both vertically and horizontally within the base concrete portion 2 and the rising portion 3. Because the rising portion 3 is frame-shaped around the periphery of the base concrete portion 2 in a plan view, water may accumulate in the space enclosed by the rising portion 3 due to, for example, rainfall during construction of the house or flooding under the floor caused by heavy rainfall after construction. An underfloor drainage structure 10 is provided as a drainage path for draining water accumulated in the space enclosed by the rising portion 3 out of the concrete foundation 1.

[0034] As shown in Fig. 1, the underfloor drainage structure 10 has a drain pipe device 11 that communicates the space surrounded by the upright portion 3 of the building's foundation concrete 1 with the outside of the foundation concrete 1, and a lid member 12. The drain pipe device 11 is for draining the water accumulated in the space surrounded by the upright portion 3 to the outside of the foundation concrete 1. It has an inlet 13A facing the inside of the foundation among the two open ends in the pipe axis direction, and an outlet 13B communicating with this inlet 13A and facing the outside of the foundation. The water inside the foundation accumulated in the space surrounded by the upright portion 3 flows into the inside of the drain pipe device 11 from the inlet 13A and flows out to the outside of the foundation from the outlet 13B. When not draining using the drain pipe device 11, the outlet 13B is closed by the lid member 12 to prevent the entry of water, pests such as termites, small animals, dust, garbage, etc. into the foundation concrete 1.

[0035] As shown in Figs. 2 to 4, the drain pipe device 11 has, for example, an outer sleeve pipe 11A (pipe body) formed in a cylindrical shape from a polyvinyl chloride resin material (PVC) or the like, an inner sleeve pipe 11B (pipe body) formed in a cylindrical shape from a polyethylene resin material (PE) or the like, and ant-proof sheets 11C, 11C' wound around the outer peripheral surface of the outer sleeve pipe 11A.

[0036] The length of the outer sleeve pipe 11A in the pipe axis direction is set to a predetermined length dimension L1 (for example, L1 = 120 mm), and the length of the inner sleeve pipe 11B in the pipe axis direction is set to a predetermined length dimension L2 (for example, L1 = 120 mm). Also, the outer diameter dimension L7 of the inner sleeve pipe 11B is made shorter than the inner diameter dimension L5 of the outer sleeve pipe 11A (L7 < L5), so that the inner sleeve pipe 11B can be inserted into the outer sleeve pipe 11A. By changing the overlapping dimension L3 (overlapping range) in which the inner sleeve pipe 11B slides in the pipe axis direction with respect to the outer sleeve pipe 11A and overlaps (duplicates), the overall length dimension of the drain pipe device 11, that is, the drainage path length dimension L4 from the inlet 13A to the outlet 13B, can be gradually changed to an arbitrary length dimension longer than the length dimension L1.

[0037] An expanded diameter section 21 having larger inner and outer diameters than the other sections is formed at the end of the outer sleeve pipe 11A on the outlet 13B side, and the cover member 12 can be inserted from the expanded diameter section 21 side. In addition, a plurality of (ten in this embodiment) annular groove sections 22 perpendicular to the pipe axis are formed on the inner peripheral surface of the outer sleeve pipe 11A at predetermined intervals L20 (for example, L20 = 10 mm) from the open end on the inlet 13A side.

[0038] One end of the inner sleeve pipe 11B is insertable into the outer sleeve pipe 11A, and the other end has an inlet 13A. The outer peripheral surface of the inner sleeve pipe 11B is provided with a plurality of (ten in this embodiment) annular ridges 32 perpendicular to the pipe axis, spaced at a predetermined interval L20 (e.g., L20 = 10 mm) from the open end opposite the outlet 13B. The outer diameter L8 of the ridges 32 is slightly longer than the inner diameter L5 of the outer sleeve pipe 11A (L8 > L5). Elastic deformation of the ridges 32 allows insertion into the outer sleeve pipe 11A, and the ridges 32 are fitted into and locked in the recessed grooves 22, restricting axial movement of the inner sleeve pipe 11B relative to the outer sleeve pipe 11A.

[0039] 5, the groove 22 and the ridge 32 are formed so that their longitudinal cross section along the pipe axis direction has a substantially triangular shape, and the tip of the ridge 32 as the locking portion fits into and is locked into the groove 22 as the locked portion. In the locked state, when an external force exceeding the locking force is applied in the pipe axis direction, the tip of the ridge 32 elastically deforms and deviates from the groove 22, becoming slidable in the pipe axis direction.

[0040] In addition, the convex rib portion 32 has an inclined surface 32A on the inlet 13A side and an inclined surface 32B on the outlet 13B side, and is formed so that the inclination angle θ2 of the inclined surface 32B with respect to a line parallel to the tube axis connecting the lower end of the inclined surface 32A and the lower end of the inclined surface 32B is larger than the inclination angle θ1 of the inclined surface 32A with respect to a line parallel to the tube axis (θ2>θ1).

[0041] In other words, since the inclination angle of inclined surface 32B relative to the pipe axis is larger than that of inclined surface 32A, the retaining force when inclined surface 32B abuts against the inner surface of recessed groove portion 22 when pushing the inner sleeve pipe 11B into the outer sleeve pipe 11A is greater than the retaining force when inclined surface 32A engages with the inner surface of recessed groove portion 22 when pulling the inner sleeve pipe 11B out of the outer sleeve pipe 11A. This structure makes it possible to prevent the length from being shorter than the set length during installation.

[0042] In this embodiment, an example has been given in which the overlap dimension L3 can be changed by changing the number of locking means that are simultaneously locked, among the multiple locking means consisting of multiple ridge portions 32 formed on the outer peripheral surface of the inner sleeve pipe 11B and multiple groove portions 22 formed on the inner peripheral surface of the outer sleeve pipe 11A. However, the present invention is not limited to this, and the overlap dimension L3 may be changed by locking one of the multiple groove portions 22 formed on the inner peripheral surface of the outer sleeve pipe 11A with one of the multiple ridge portions 32 formed on the outer peripheral surface of the inner sleeve pipe 11B, or by locking one of the multiple ridge portions 32 formed on the outer peripheral surface of the inner sleeve pipe 11B with one groove portion 22 formed on the inner peripheral surface of the outer sleeve pipe 11A.

[0043] In addition, a sealing member may be provided at the end of the inner sleeve pipe 11B on the outlet 13B side so that it adheres tightly to the inner surface of the outer sleeve pipe 11A.This makes it possible to prevent water from seeping into the concrete through the gap between the outer sleeve pipe 11A and the inner sleeve pipe 11B after the foundation is constructed.

[0044] Furthermore, a flange 33 is formed on the outer peripheral surface of the inner sleeve pipe 11B at the end on the inlet 13A side, protruding outward as a finger hook. The outer diameter L9 of the flange 33 is longer than the outer diameter L6 of the outer sleeve pipe 11A (L9>L6), so that even when the flange 33 approaches the end of the outer sleeve pipe 11A, the flange 33 protrudes outward from the outer peripheral surface of the outer sleeve pipe 11A, making it easy to hook a finger on the flange 33.

[0045] In this embodiment, the finger hook is formed on the outer peripheral surface of the inner sleeve pipe 11B in an annular shape by the flange 33. However, the present invention is not limited to this, and the finger hook may be formed only on a part of the circumference of the inner sleeve pipe 11B. Also, the finger hook may be formed near the end, not at the end.

[0046] The anti-termite sheets 11C and 11C' are formed by impregnating an elastic member or a non-vulcanized member with an anti-termite agent and forming them into a sheet-like product of a predetermined thickness (e.g., 2 to 5 mm), and examples thereof include reclaimed butyl rubber. Reclaimed butyl rubber may be used alone, or reclaimed butyl rubber mixed with one or more of natural rubber, synthetic rubber, thermoplastic elastomer, etc. Furthermore, the elastic member or non-vulcanized member may be appropriately blended with reinforcing agents, fillers, plasticizers, softeners, antioxidants, adhesives, processing aids, colorants, crosslinking agents, crosslinking aids, etc.

[0047] Furthermore, the anti-termite sheet 11C' as the first member has a higher hardness than the anti-termite sheet 11C as the second member, and is provided at the end on the outlet 13B side (external end), while the anti-termite sheet 11C is provided closer to the inlet 13A side (internal side) than the anti-termite sheet 11C'. While the present embodiment illustrates a configuration in which the anti-termite sheet 11C' provided at the end on the outlet 13B side is harder than the anti-termite sheet 11C on the inlet 13A side, the present invention is not limited thereto, and the anti-termite sheets 11C and 11C' may have the same or substantially the same hardness. Furthermore, the anti-termite sheets 11C and 11C' may be formed separately or integrally formed by two-color molding or the like. Furthermore, as long as they are provided at least at the end on the outlet 13B side (external end) or near the end on the outlet 13B side (near the external end) on the outer peripheral surface of the outer sleeve pipe 11A, they need not be provided elsewhere.

[0048] The lid member 12 is composed of a cylindrical portion 40 having an outer diameter dimension L10 shorter than the inner diameter dimension L5' of the enlarged diameter portion 21 of the outer sleeve tube 11A (L10 < L5'), and a disc-shaped lid plate 41 provided so as to close one end opening of the cylindrical portion 40. An annular guide portion 42 that can be inserted into the enlarged diameter portion 21 of the outer sleeve tube 11A and cannot be inserted deeper than the enlarged diameter portion 21 protrudes from the outer peripheral surface of the cylindrical portion 40, and a seal member 43 made of a rubber material or the like is fitted into a concave groove formed on the outer peripheral surface of the guide portion 42.

[0049] Therefore, when the cylindrical portion 40 is inserted into the outlet 13B of the outer sleeve tube 11A and the guide portion 42 is positioned within the enlarged diameter portion 21, the seal member 43 is pressed against the inner peripheral surface of the enlarged diameter portion 21, so that the outlet 13B is closed in a water-sealed state by the lid member 12.

[0050] Also, the outer diameter dimension L11 of the lid plate 41 is made longer than the outer diameter dimension L6' of the enlarged diameter portion 21 of the outer sleeve tube 11A (L11 > L6'), so that when the lid plate 41 abuts against the end face around the outlet 13B of the outer sleeve tube 11A and the outlet 13B is closed, the flange portion 41A of the lid plate 41 is arranged to protrude outside the outer peripheral surface of the outer sleeve tube 11A. Further, an inclined surface 41B that is thinner from the center side to the outside and inclined toward the outlet 13B side is formed on the outer peripheral edge portion of the lid plate 41.

[0051] A recess 44 having a rectangular opening is formed at a substantially central position on the outer surface of the lid plate 41. By fitting a tool such as a driver into the recess 44 and pulling out the lid member 12 in the tube axis direction, the lid member 12 can be removed from the outer sleeve tube 11A.

[0052] Note that the lid member 12 has a structure that is attached by being inserted into the outer sleeve tube 11A, but it may also have a structure in which the lid member 像 12 is screwed and attached into the outer sleeve tube 11A as in Example 2 described later.

[0053] As shown in Figures 6(a) and (b), the drainage piping device 11 configured in this manner allows the inner sleeve pipe 11B to be inserted from the opening on the opposite side of the outlet 13B in the outer sleeve pipe 11A, and by sliding the inner sleeve pipe 11B in the axial direction relative to the outer sleeve pipe 11A to change the overlapping dimension L3, the overall length of the drainage piping device 11, i.e., the drainage path length dimension L4 from the inlet 13A to the outlet 13B, can be changed to any length dimension longer than the length dimension L1.

[0054] Specifically, as shown in Figure 6(a), when almost the entire inner sleeve pipe 11B is inserted into the outer sleeve pipe 11A, the overlap dimension L3 is long, and therefore the drainage path length dimension L4 is short. On the other hand, as shown in Figure 6(b), when only a part of the inner sleeve pipe 11B is inserted into the outer sleeve pipe 11A, the overlap dimension L3 is short, and therefore the drainage path length dimension L4 is long. Therefore, the drainage path length dimension L4 can be changed to match the thickness dimension of the rising portion 3.

[0055] Furthermore, when the inner sleeve pipe 11B is slid relative to the outer sleeve pipe 11A in the pipe axis direction, the ridge portions 32 fit into and engage the recessed groove portions 22, so that after changing the drainage path length dimension L4 to the desired value, the desired drainage path length dimension L4 is maintained without the need to restrict the axial movement of the inner sleeve pipe 11B relative to the outer sleeve pipe 11A using adhesives, screws, etc., thereby preventing displacement of the inner sleeve pipe 11B relative to the outer sleeve pipe 11A. Furthermore, since the locked state can be released by applying an external force in the pipe axis direction that is greater than the locking force while the lock is in place, the length can be easily changed.

[0056] In this embodiment, the length of the outer sleeve pipe 11A is 120 mm, and the outer sleeve pipe 11A has ten grooves 22 and the inner sleeve pipe 11B has ten ridges 32 spaced 10 mm apart. The drainage path length L4 can be varied within a range of 120 to 220 mm (plus the thickness of the flange 33). However, the intervals between the grooves 22 and the ridges 32 may be set to a value other than 10 mm (e.g., 1 mm, 2 mm, 5 mm, 15 mm, etc.), and the number of grooves 22 and ridges 32 may be set to a number other than 10 (e.g., 2, 5, 15, etc.). Furthermore, the range within which the drainage path length L4 can be varied is not limited to 120 to 220 mm (plus the thickness of the flange 33). The outer sleeve pipe 11A and the inner sleeve pipe 11B may have different lengths, allowing the drainage path length L4 to be varied within a range other than 120 to 220 mm (plus the thickness of the flange 33).

[0057] [Example of construction of underfloor drainage structure 10 using drainage piping device 11] Next, an example of construction of the underfloor drainage structure 10 using the drainage piping device 11 will be described with reference to FIGS.

[0058] First, as shown in FIG. 7(a), reinforcing bars (not shown) are placed in the areas where concrete will be poured to form the base concrete portion 2 and the rising portion 3. An outer formwork FA is also installed to form the outer surface of the rising portion 3. As described above, the drainage piping device 11 to be used is set in advance to a drainage path length L4 that corresponds to the thickness of the rising portion 3 to be constructed by sliding the inner sleeve pipe 11B relative to the outer sleeve pipe 11A in the pipe axial direction to change the overlap dimension L3. The cover member 12 is removed from the outer sleeve pipe 11A.

[0059] Next, as shown in Figure 7(b), the concrete base 2 is poured. Before the concrete base 2 hardens, the drainage piping device 11 is placed in place. For example, by pressing the drainage piping device 11 against the concrete base 2, the lower part of the drainage piping device 11 can be installed so that it is embedded in the concrete base 2. By pressing the lower surface of the drainage piping device 11 against the concrete base 2 before it hardens, air can be efficiently removed from between the lower surface of the drainage piping device 11 and the concrete base 2.

[0060] Furthermore, when the lower surface of the drainage piping device 11 is pressed against the unhardened concrete base 2, the lower end of the inlet 13A of the inner sleeve pipe 11B is positioned at the same height as or slightly below the upper surface of the concrete base 2, making it easier for water that accumulates on the upper surface of the concrete base 2 to flow into the inlet 13A. The end face of the outer sleeve pipe 11A on the outlet 13B side is pressed against the inner surface of the outer formwork FA to prevent concrete from entering between the inner surface and the end face of the formwork FA. A water collection channel or guide path may be installed separately or formed on the concrete surface to facilitate the flow of water into the inlet 13A.

[0061] Furthermore, in the water drainage piping device 11, the inclination angle θ2 of the inclined surface 32B of the convex bar portion 32 is greater than the inclination angle θ1 of the inclined surface 32A (θ2>θ1), and therefore the locking force in the sliding direction in which the overlapping dimension L3 is the longer dimension is greater than the locking force in the sliding direction in which the overlapping dimension L3 is the shorter dimension.In other words, the locking force that restricts the sliding movement of the inner sleeve pipe 11B in the insertion direction is greater than the locking force that restricts the sliding movement in the removal direction.Therefore, it is possible to prevent the water drainage piping device 11 from becoming shorter than the set length due to the application of external forces, such as contact when installing the formwork FB, between the time when the water drainage piping device 11 is placed in the pre-hardening base concrete portion 2 and the time when the concrete hardens.

[0062] In addition, since the lower part of the flange portion 33 of the inner sleeve pipe 11B is installed so as to be embedded in the concrete, when the concrete of the base concrete portion 2 hardens and the concrete of the rising portion 3 is poured, the inner sleeve pipe 11B is prevented from shifting in position in the pipe axis direction, for example, by being pushed by the flowing concrete.

[0063] Although not shown, a pair of protruding seats for fixing to the upper surface of the concrete base 2 may be provided on both sides of the pipe axis at the lower part of the outer circumferential surface of the outer sleeve pipe 11A, or piles to be buried in the concrete base 2 may be provided at the lower part of the outer circumferential surface of the outer sleeve pipe 11A to prevent the drainage piping device 11 from rolling in the circumferential direction. Furthermore, the support surfaces of the outer sleeve pipe 11A at the pair of seats may be formed slightly inclined, which makes it easier to tilt the drainage piping device 11 downward from the inside to the outside of the rising part 3 and promotes drainage.

[0064] Next, as shown in Figure 7(c), the inner formwork FB is installed. At this time, the inner surface of the inner formwork FB is pressed against the end face of the inner sleeve pipe 11B on the inlet 13A side to prevent concrete from entering between the inner surface and the end face of the formwork FB. This causes the drainage piping device 11 to be sandwiched between the formworks FA and FB on both sides of the pipe axis. Note that an O-ring or the like may be provided on the abutting surface of the flange portion 33 with the formwork FB to prevent concrete from entering. Thereafter, concrete is poured into the rising portion 3.

[0065] After the concrete in the rising portion 3 has hardened, the formwork FA and FB are removed, and an underfloor drainage structure 10 is formed in which the drainage piping device 11 is arranged to penetrate the rising portion 3 in the thickness direction.

[0066] When the underfloor drainage structure 10 is configured, the inlet 13A is positioned approximately flush with the inner surface of the rising portion 3, and the outlet 13B is positioned approximately flush with the outer surface of the rising portion 3. In addition, by positioning the lower end of the inlet 13A at the same height as or slightly below the upper surface of the concrete base portion 2, water that accumulates on the upper surface of the concrete base portion 2 can easily flow into the inlet 13A.

[0067] Water that flows into the interior from the inlet 13A is guided inside the drainage piping device 11 toward the outlet 13B, and then flows out of the foundation from the outlet 13B. Furthermore, by inserting the inner sleeve pipe 11B inside the outer sleeve pipe 11A so that they overlap, the lower part of the inner circumferential surface of the inner sleeve pipe 11B is higher than the lower part of the inner circumferential surface of the outer sleeve pipe 11A, so that water that flows into the interior from the inlet 13A is smoothly guided from the inner sleeve pipe 11B to the outer sleeve pipe 11A. Note that the outer sleeve pipe 11A and the inner sleeve pipe 11B may be overlapped so that the outer sleeve pipe 11A is inserted inside the inner sleeve pipe 11B.

[0068] Furthermore, by placing anti-termite sheets 11C, 11C' containing an anti-termite agent on the outer peripheral surface of the outer sleeve pipe 11A, no gaps are formed between the concrete and the outer sleeve pipe 11A, preventing the intrusion of pests such as termites, dust, garbage, etc. through the gaps and enhancing the anti-termite effect against termites.

[0069] Furthermore, by providing anti-termite sheet 11C' so as to cover at least the end of the outer peripheral surface of outer sleeve pipe 11A on the outlet 13B side, it is possible to effectively prevent termite invasion. Furthermore, since anti-termite sheet 11C' is harder than anti-termite sheet 11C, it is possible to prevent anti-termite sheet 11C' from flowing out, while by providing anti-termite sheet 11C, which has a relatively lower hardness, closer to the inlet 13A side than anti-termite sheet 11C', it is possible to reliably prevent gaps from occurring between the concrete and the outer peripheral surface of outer sleeve pipe 11A.

[0070] As shown in Figure 8(a), the convex rib portion 32 of the inner sleeve pipe 11B that is not engaged with the concave groove portion 22 is exposed on the outer surface, thereby effectively preventing the inner sleeve pipe 11B from coming off the rising portion 3 after the concrete has hardened.

[0071] 8(a), by attaching the cover member 12 to the outlet 13B after the concrete in the rising portion 3 has hardened, it is possible to prevent termites from entering through the outlet 13B. With the cover member 12 attached, the flange 41A of the cover plate 41 overlaps the surface of the concrete that extends further outward from the end face of the outer sleeve pipe 11A around the outlet 13B, thereby concealing the boundary between the end face of the outer sleeve pipe 11A around the outlet 13B and the surface of the concrete, thereby improving the design.

[0072] In addition, an inclined surface 41B is formed on the outer peripheral edge of the cover plate 41, sloping toward the outlet 13B so that the thickness becomes thinner from the center to the outside, making the boundary between the cover member 12 and the concrete surface less noticeable and improving the design when the outlet 13B is closed with the cover member 12.

[0073] Furthermore, as shown in Figure 8(b), after the concrete of the rising portion 3 has hardened, a coating film portion 5 may be formed on the outer surface (surface) of the base concrete portion 2 and the rising portion 3 by applying a decorative treatment such as applying mortar or the like.

[0074] In this case, the cover plate 41 of the cover member 12 is positioned on the surface side of the coating film portion 5, so that the cover plate 41 is separated from the end face of the outer sleeve tube 11A, but the sealing member 43 abuts against the inner surface of the expanded diameter portion 21, so that the water-sealed state of the outlet 13B is maintained.

[0075] In addition, in this embodiment, an example is given of a form in which the drainage path length dimension L4 can be changed by changing the overlapping range between the outer sleeve pipe 11A and the inner sleeve pipe 11B, but the present invention is not limited to this, and the drainage path length dimension L4 may also be changed by overlapping three or more pipe bodies with each other.

[0076] In addition, in this embodiment, an outlet is formed at one end of the outer sleeve pipe 11A and an inlet is formed at the other end of the inner sleeve pipe 11B, but it is also possible to have an inlet formed at one end of the outer sleeve pipe 11A and an outlet formed at the other end of the inner sleeve pipe 11B.

[0077] [Variation 1] Next, a drainage piping device 11 according to a first modified example of the present invention will be described with reference to Fig. 9. Fig. 9 is a vertical cross-sectional view showing the internal structure of the drainage piping device according to the first modified example of the present invention.

[0078] In the first embodiment, a configuration was exemplified in which the ridge portion 32 serving as an engagement portion formed on the outer peripheral surface of the inner sleeve pipe 11B is engaged with the recessed groove portion 22 formed on the inner peripheral surface of the outer sleeve pipe 11A, thereby allowing the inner sleeve pipe 11B to slide in the pipe axis direction relative to the outer sleeve pipe 11A and restricting the axial sliding movement of the inner sleeve pipe 11B relative to the outer sleeve pipe 11A. However, the present invention is not limited to this. For example, as shown in FIG. 9 , a female thread portion 25 may be formed helically on the inner peripheral surface of the outer sleeve pipe 11A, and a male thread portion 35 may be formed helically on the outer peripheral surface of the inner sleeve pipe 11B, and the inner sleeve pipe 11B may be rotated around the pipe axis to thread the male thread portion 35 into the female thread portion 25. In this manner, the inner sleeve pipe 11B is allowed to slide in the pipe axis direction relative to the outer sleeve pipe 11A, and the axial sliding movement of the inner sleeve pipe 11B relative to the outer sleeve pipe 11A is restricted.

[0079] In this case, by rotating the inner sleeve pipe 11B forward or backward around the pipe axis to change the overlap dimension L3 (overlap range), the overall length L4 of the drainage piping device 11 can be continuously changed to a length dimension longer than the length dimension L1. In this case, the length can be changed by the simple operation of rotating the inner sleeve pipe 11B around the pipe axis, and the changed length dimension can be maintained. Note that a helical male thread may be formed on the inner peripheral surface of the outer sleeve pipe 11A, and a helical female thread may be formed on the outer peripheral surface of the inner sleeve pipe 11B.

[0080] Although not shown, the inner sleeve pipe 11B may be configured to be slidable in the axial direction while the outer peripheral surface of the inner sleeve pipe 11B is in contact with the inner peripheral surface of the outer sleeve pipe 11A. In such a configuration, a seal member may be provided at the end of the inner sleeve pipe 11B on the outlet 13B side so as to be in close contact with the inner peripheral surface of the outer sleeve pipe 11A. This prevents water from seeping into the concrete through the gap between the outer sleeve pipe 11A and the inner sleeve pipe 11B after the foundation is constructed. [Example]

[0081] A drainage piping device according to a second embodiment of the present invention will be described with reference to Figures 10 to 13. Figure 10 is an exploded perspective view showing the configuration of the drainage piping device according to the second embodiment of the present invention. Figure 11 is a cross-sectional view showing the internal structure of the drainage piping device of Figure 10. Figure 12 includes cross-sectional views (a) to (c) showing an example of changing the length of the drainage path. Figure 13 includes cross-sectional views (a) and (b) showing the state in which the cover member is attached to the outer sleeve pipe after decorative treatment. In the following description, like components and parts to those of the first embodiment will be designated by like reference numerals and detailed description thereof will be omitted.

[0082] [Configuration of water drainage piping device 11] As shown in Figures 10 and 11, the drainage piping device 51 of this embodiment used in the underfloor drainage structure 10 has a main pipe 51A (pipe body) formed in a cylindrical shape from, for example, polyvinyl chloride resin material (PVC) or the like, a plurality of connecting pipes 51B (pipe bodies) formed in an approximately square cylindrical shape from, for example, polyvinyl chloride resin material (PVC) or the like and which can be connected (joined) by engaging with the main pipe 51A, and an approximately square cylindrical spacer member 51C which can be attached to the end face of the connecting pipe 51B.

[0083] The length of the main tube 51A in the axial direction is a predetermined length dimension L51 (e.g., L51 = 120 mm), and the length of each of the multiple connecting tubes 51B in the axial direction is a predetermined length dimension L52 (e.g., L52 = 20 mm). In other words, the length L51 of the main tube 51A in the axial direction is longer than the length L52 of each of the connecting tubes 51B in the axial direction (L51 > L52).

[0084] Main pipe 51A is composed of cylindrical portion 52, expanded diameter portion 21 formed on the outlet 13B side of cylindrical portion 52, and connected portion 53 formed on the end of cylindrical portion 52 opposite outlet 13B and to which connecting pipe 51B can be connected. Connected portion 53 is substantially rectangular tubular and formed integrally with cylindrical portion 52, and on the end face opposite outlet 13B, groove-like engaging recess 55 into which engaging protrusion 57 (described later) can be inserted is formed in the shape of a substantially rectangular frame when viewed from the inlet 13A side.

[0085] Connecting pipe 51B is composed of an extension 56 having the same inner and outer diameters as connected part 53 of main pipe 51A, an engaging protrusion 57 protruding in the pipe axial direction from one end surface of extension 56 and insertable into engaging recess 55 of connected part 53, and an engaging recess 58 formed on the other end surface of extension 56 and into which engaging protrusion 57 can be inserted. Engaging recess 58 is formed in a substantially rectangular frame shape when viewed from the inlet 13A side, and has the same shape as engaging recess 55 of main pipe 51A.

[0086] In addition, a sealing member may be provided on at least a portion of the engaging protrusion 57 of the connecting pipe 51B to tightly fit with the engaging recess 53 or the engaging recess 58. This makes it possible to prevent water from seeping into the concrete through the gap between the outer sleeve pipe 11A and the inner sleeve pipe 11B after the foundation is constructed.

[0087] These connecting pipes 51B are formed so that multiple pipes can be connected (joined) in the tube axial direction, and the length of the extension portion 56 of each connecting pipe 51B in the tube axial direction is an extension dimension L53 (for example, L53 = 10 mm). Note that the extension dimension L53 is not limited to the above and can be changed in various ways. Furthermore, there may be multiple connecting pipes 51B with different extension dimensions L53 (for example, L53 = 1 mm, 2 mm, 5 mm, 15 mm, etc.).

[0088] Spacer member 51C consists of a square frame member of the same shape as engaging protrusion 57 of connecting pipe 51B, and when inserted into engaging recess 58, the end face of spacer member 51C and the end face of connecting pipe 51B facing engaging recess 58 are approximately flush with each other.Furthermore, when inserted into engaging recess 55 of main pipe 51A, the end face of spacer member 51C and the end face of connecting pipe 51B facing engaging recess 58 are also approximately flush with each other.

[0089] In this embodiment, a female thread portion 61 is formed spirally near the inlet 13A side of the expanded diameter portion 21 on the inner surface of the main tube 51A, and a male thread portion 62 is formed spirally on the outer surface of the tubular portion 40 of the cover member 12 near the inlet 13A side of the sealing member 43.Therefore, the cover member 12 can be removed from the main tube 51A by inserting a general-purpose tool such as a screwdriver into the recess 44 of the cover plate 41 and pulling the cover member 12 toward the front while rotating it circumferentially around the tube axis.

[0090] Although the cover member 12 is configured to be attached by screwing it into the main body tube 51A, it may also be configured to be attached by inserting the cover member 12 into the main body tube 51A as in the first embodiment described above.

[0091] The drainage piping device 51 configured in this manner can be gradually changed to any length dimension longer than the length dimension L51 by connecting (connecting) a connecting pipe 51B to the end face of the main pipe 51A on the inlet 13A side, or by engaging and connecting another connecting pipe 51B to the connecting pipe 51B, so that the overall length dimension of the drainage piping device 51, i.e., the drainage path length dimension L54 from the inlet 13A to the outlet 13B, can be gradually changed to any length dimension longer than the length dimension L51.

[0092] Specifically, as shown in Figure 12(a), connecting pipe 51B arranged on the inlet 13A side of main pipe 51A is connected to main pipe 51A so that engaging protrusion 57 of connecting pipe 51B fits into and engages with engaging recess 55 of main pipe 51A, as shown in Figure 12(b), thereby extending drainage path length L54 of drainage piping device 51 in the pipe axial direction by extension dimension L53. Next, another connecting pipe 51B arranged further on the inlet 13A side of connecting pipe 51B engaged with main pipe 51A is engaged with main pipe 51A so that engaging protrusion 57 of connecting pipe 51B fits into engaging recess 55 of main pipe 51A, as shown in Figure 12(c), thereby extending drainage path length L54 of drainage piping device 51 in the pipe axial direction by twice extension dimension L53.

[0093] When the drainage path length dimension L54 shown in Figure 12(c) is set, fitting spacer member 51C into engagement recess 58 of connecting pipe 51B closest to the end makes the end face of connecting pipe 51B closest to the end flat. The opening of connecting pipe 51B closest to the end, to which spacer member 51C is attached, functions as outlet 13B of drainage piping device 51 (see Figure 13(c)). Note that when only main pipe 51A is used and connecting pipe 51B is not used, fitting spacer member 51C into engagement recess 58 of connecting pipe 51B makes the end face of main pipe 51A flat, and the opening of main pipe 51A functions as outlet 13B of drainage piping device 51.

[0094] In the drainage piping device 51 of Example 2 configured as described above, by connecting (connecting) a connecting pipe 51B to the end face of the main pipe 51A on the side of the inlet 13A, or by connecting another connecting pipe 51B to the connecting pipe 51B, and repeating this process, the overall length of the drainage piping device 51, i.e., the drainage path length L54 from the inlet 13A to the outlet 13B, can be changed to a desired length depending on the number of connecting pipes 51B connected, and therefore the length can be changed in advance to a length that corresponds to the thickness of the rising portion 3 to be constructed. Note that the length L51 of the main pipe 51 is 120 mm, and by connecting connecting pipes 51B, the drainage path length L4 can be changed to 120 mm or more. However, the length L51 of the main pipe 51 may be set to another length (e.g., 50 mm, 100 mm, 150 mm, etc.), and the drainage path length L4 may be changed to a length less than 120 mm or a length greater than 120 mm. In addition, instead of using connecting pipes 51B of a fixed size, multiple types of connecting pipes 51B with different length dimensions L53 may be combined to change the drainage path length dimension L4, so as to accommodate various thicknesses of the rising portion 3.

[0095] Then, by installing the drainage piping device 51 in which the drainage path length dimension L54 is set to the desired length dimension in the same manner as described in Figures 7 and 8 of Example 1, an underfloor drainage structure 10 such as that shown in Figure 13(a) or Figure 13(b) can be constructed.

[0096] Furthermore, when the male threaded portion 62 is screwed into the female threaded portion 61, the sealing member 43 adheres closely to the inner surface of the pipe over a predetermined range on the outlet 13B side of the threaded range between the male threaded portion 62 and the female threaded portion 61. Therefore, as shown in Figure 13(b), by applying a decorative treatment to the surface of the foundation concrete 1 and increasing the thickness from the outlet 13B to the surface of the foundation concrete 1, even if the threaded portion of the cover member 12 cannot be screwed all the way in, the sealing member 43 can be made to adhere closely to the inner surface of the pipe, thereby maintaining a watertight state.

[0097] [Variation 2] Next, a drainage piping device 51 and a lid member 12 according to a second modification of the present invention will be described with reference to Fig. 14. Fig. 14(a) is a cross-sectional view showing a state in which the lid member according to the second modification of the present invention is attached to a main body pipe, and Fig. 14(b) is a cross-sectional view showing a state in which the lid member is attached to the main body pipe after decorative treatment.

[0098] In the above-mentioned Example 2, the sealing member 43 of the cover member 12 is exemplified as being provided at a position where it is in close contact with the inner circumferential surface of the pipe over a predetermined range closer to the outlet 13B than the threaded range between the male thread portion 62 and the female thread portion 61 when the male thread portion 62 is threaded into the female thread portion 61. However, the present invention is not limited to this. For example, as shown in Figure 14(a), the female thread portion 61 may be formed spirally in the expanded diameter portion 21 on the inner circumferential surface of the main pipe 51A of this modified example, and the male thread portion 62 may be formed spirally at a position closer to the outlet 13B than the sealing member 43 on the outer circumferential surface of the tubular portion 40 of the cover member 12.

[0099] By doing this, as shown in Figure 14(b), a decorative finish is applied to the surface of the foundation concrete 1, and the thickness from the outlet 13B to the surface of the foundation concrete 1 is increased, so that even if the threaded portion of the cover member 12 cannot be threaded all the way in, the sealing member 43 can be made to adhere tightly to the inner surface of the pipe, thereby maintaining a water-tight state.

[0100] As shown in Figure 14(b), a female thread portion 61 is formed on the inner surface of the enlarged diameter portion 21, and a male thread portion 62 is formed on the outer surface of the enlarged diameter portion formed on the tubular portion 40, thereby preventing the sealing member 43 from adhering to the female thread portion 61 when the cover member 12 is inserted into the outlet 13B, but the female thread portion 61 does not necessarily have to be formed on the inner surface of the enlarged diameter portion 21.

[0101] [Variations 3 to 5] Next, drainage piping devices 51 according to modifications 3 to 5 of the present invention will be described with reference to Fig. 15. Fig. 15(a) is a cross-sectional view showing a state in which an engagement pipe according to modification 3 of the present invention is connected to a main pipe, (b) is a cross-sectional view showing a state in which an engagement pipe according to modification 4 of the present invention is connected to a main pipe, and (c) is a cross-sectional view showing a state in which an engagement pipe according to modification 5 of the present invention is connected to a main pipe.

[0102] In the above-mentioned Example 2, an example was given of a form in which the spacer member 51C is fitted into the engagement recess 58 of the connecting pipe 51B that is connected to the main pipe 51A closest to the inlet 13A, i.e., the connecting pipe 51B that forms the inlet 13A of the drainage piping device 51, but the present invention is not limited to this, and for example, as in Modified Example 3 shown in Figure 15(a), the connecting pipe 51B that forms the inlet 13A of the drainage piping device 51 may have a different function, shape, etc. from the connecting pipe 51B that is connected closer to the outlet 13B than the connecting pipe 51B.

[0103] Specifically, the connecting pipe 51B that forms the inlet 13A of the drainage piping device 51 may be formed, for example, so that the outer and inner surfaces of the extension portion 56 expand outward toward the inlet 13A so that the diameter of the inlet 13A is expanded, and by doing so, water that has accumulated on the upper surface of the base concrete portion 2 can be smoothly guided into the interior of the drainage piping device 51.

[0104] Furthermore, in the above-mentioned Example 2, an example was given of a configuration in which an engaging protrusion 57 is formed on one end surface of the extension portion 56 and an engaging recess 58 into which the engaging protrusion 57 can be inserted is formed on the other end surface of the extension portion 56, but the present invention is not limited to this. For example, as in Modified Example 4 shown in Figure 15(b), a step 70 into which the engaging protrusion 57 can engage may be formed on the inner surface of the end of the connected portion 53 with which the connecting pipe 51B engages, and a step 71 as an engaged portion into which the engaging protrusion 57 or the spacer member 51C can engage may be formed on the inner surface of the extension portion 56 of each connecting pipe 51B.

[0105] Furthermore, as shown in variant example 5 in Figure 15(c), a step portion 72 with which the engaging protrusion 57 can engage may be formed on the outer peripheral surface of the end of the connected portion 53 with which the connecting pipe 51B engages, and a step portion 73 as an engaged portion with which the engaging protrusion 57 or the spacer member 51C can engage may be formed on the outer peripheral surface of the extension portion 56 of each connecting pipe 51B.

[0106] [Variation 6] Next, a drainage piping device according to a sixth modified example of the present invention will be described with reference to Fig. 16. Fig. 16(a) is a perspective view showing the configuration of the drainage piping device according to the sixth modified example of the present invention, and (b) and (c) are cross-sectional views showing a state in which the length of the drainage path has been changed by changing the engagement mode of the engagement pipe.

[0107] In the above-mentioned Example 2 and Variations 2 to 5, an example was given in which the length dimension of the drainage path can be changed by engaging another engaging pipe with the engaging pipe engaged with the main pipe 51A and increasing or decreasing the number of engaging pipes, but the present invention is not limited to this, and the length dimension of the drainage path can also be changed by changing the engagement mode of the connecting pipe 51B with the main pipe 51A, as shown in Figure 16(a).

[0108] 16(a), for example, a stepped portion 80 having a substantially rectangular frame shape is formed on the inner circumferential surface of the connected portion 53 of the main tube 51A, and engaging recesses 81A-81C are formed at a predetermined length in the pipe axial direction on three of the four sides 80A-80C of the stepped portion 80. The engaging protrusion 57 of the connecting tube 51B is provided in a rectangular frame shape on the end surface of the extension portion 56 so as to be insertable into the inner circumferential surface of the connected portion 53, and engaging protrusions 57A-57C that can engage with the engaging recesses 81A-81C are provided on three of the four sides of the engaging protrusion 57. The protruding lengths of the engaging protrusions 57A-57C in the pipe axial direction are longer in the order of engaging protrusions 57A, 57B, and 57C (protruding length 57A<57B<57C). On the other hand, the engaging recesses 81A to 81C are formed so that the engaging protrusion 57C, which has the longest protruding length, can be fitted therein.

[0109] As shown in Figure 16(b), when connecting pipe 51B is connected to connected portion 53 so that engaging protrusion 57A engages with engaging recess 81A, engaging protrusion 57B engages with engaging recess 81B, and engaging protrusion 57C engages with engaging recess 81C, the tip surface of engaging protrusion 57 abuts against side portion 80D of connected portion 53, and extension dimension L53 becomes the length dimension of extension portion 56 in the pipe axial direction.

[0110] Furthermore, as shown in Figure 16(c), when connecting pipe 51B is connected to connected portion 53 so that engaging protrusion 57A engages with engaging recess 81B and engaging protrusion 57B engages with engaging recess 81C, the longest engaging protrusion 57C abuts against side portion 80D, so that none of engaging protrusions 57A to 57C engages with engaging recesses 81A to 81C, and extension dimension L53 is the sum of the length dimension of extension portion 56 in the pipe axial direction and the protruding dimension of engaging protrusion 57C, and is therefore the longest.

[0111] Although not specifically shown, when connecting pipe 51B is connected to connected portion 53 so that engaging protrusion 57A engages with engaging recess 81C and engaging protrusion 57C engages with engaging recess 81A, engaging protrusion 57B abuts against side portion 80D, so that no engaging protrusions engage with engaging recess 81B, and extension dimension L53 becomes the sum of the length of extension portion 56 in the tube axial direction and the protruding dimension of engaging protrusion 57B. Also, when connecting pipe 51B is connected to connected portion 53 so that engaging protrusion 57B engages with engaging recess 81A and engaging protrusion 57C engages with engaging recess 81B, engaging protrusion 57A abuts against side portion 80D, so that no engaging protrusions engage with engaging recess 81C, and extension dimension L53 becomes the sum of the length of extension portion 56 in the tube axial direction and the protruding dimension of engaging protrusion 57A.

[0112] In this way, the length of the drainage path may be changed in multiple ways by changing the engagement mode of connecting pipe 51B with main pipe 51A. In this case, without preparing multiple connecting pipes 51B, the extension dimension L53 can be changed in four ways simply by rotating connecting pipe 51B by a predetermined angle around the pipe axis. In this modified example, each of the three engaging protrusions can be selectively engaged with each of the three engaging recesses, but each of three or more engaging protrusions may be selectively engaged with each of three or more engaging recesses.

[0113] Furthermore, after connecting the connecting pipe 51B of this modified example to the main pipe 51A, one or more connecting pipes 51B of Example 2 may be further connected to the end of the connecting pipe 51B of this modified example, thereby further increasing the length of the drainage path.

[0114] [Variation 7] Next, a drainage piping device according to a seventh modification of the present invention will be described with reference to Fig. 17. Fig. 17(a) is a cross-sectional view showing the configuration of the drainage piping device according to the seventh modification of the present invention, and (b) and (c) are cross-sectional views showing a state in which the length of the drainage path has been changed by changing the engagement mode of the engagement pipe.

[0115] 17(a), the outer sleeve pipe 11A of this modified example has an engagement groove 90 formed on its inner circumferential surface on the inlet 13A side. The engagement groove 90 has a guide portion 90A extending in the pipe axial direction from the end on the inlet 13A side toward the outlet 13B, and engagement portions 90B to 90F extending circumferentially from different positions along the longitudinal direction of the guide portion 90A. Meanwhile, the inner sleeve pipe 11B has an insertion portion 91 that can be inserted into the outer sleeve pipe 11A, and an engagement protrusion 92 that can engage with the engagement groove 90 protrudes outward from the outer circumferential surface of the insertion portion 91 near the end on the outlet 13B side.

[0116] In the drain piping device 11 of this modified example configured as above, as shown in Figure 17(b), with the engaging protrusion 92 aligned with the engaging groove 90, the insertion portion 91 is inserted into the outer sleeve pipe 11A, and the engaging protrusion 92 is slid along the guide portion 90A, and then when it reaches the engaging portion 90F formed closest to the outlet 13B, the inner sleeve pipe 11B is rotated about the pipe axis, whereby the engaging protrusion 92 engages with the engaging portion 90F, restricting the sliding movement of the inner sleeve pipe 11B in the pipe axis direction and achieving the shortest length of the drain path.

[0117] Furthermore, as shown in Figure 17(c), when the inner sleeve tube 11B is rotated around the tube axis when the engaging protrusion 92 reaches the engaging portion 90C, the engaging protrusion 92 engages with the engaging portion 90C, restricting the sliding movement of the inner sleeve tube 11B in the tube axis direction, and the portion not inserted into the outer sleeve tube 11A becomes an extension dimension L3', and the length dimension of the drainage path is longer by the extension dimension L3' than the state shown in Figure 17(B).

[0118] In this way, the length of the drainage path may be changed by changing the engagement mode of the inner sleeve pipe 11B with the outer sleeve pipe 11A. In this case, the length of the drainage path can be changed in stages without preparing multiple pipes, by simply inserting the inner sleeve pipe 11B into the outer sleeve pipe 11A to a predetermined depth and then rotating it by a predetermined angle around the pipe axis. Note that the number of engagement portions 90B to 90F can be changed in various ways and is not limited to five as described above.

[0119] Furthermore, in the drainage piping device 11 of Example 1 and the drainage piping device 51 of Example 2 and Modifications 1 to 6, the cross-sectional shape perpendicular to the pipe axis of the pipe bodies such as the outer sleeve pipe 11A (pipe body), the inner sleeve pipe 11B (pipe body), and the cylindrical portion 52 of the main pipe 51A was basically formed to be annular or approximately annular, but the longitudinal cross-sectional shape perpendicular to the pipe axis may be formed to be approximately rectangular frame-like as shown in Figure 18(a), or may be formed to be non-annular or non-rectangular frame-like as shown in Figure 18(b). In other words, any shape may be used as long as it is annular.

[0120] Furthermore, as shown in Figures 18(a) and (b), the lower part is formed flat, which improves stability when placing the drainage piping device 11 on the semi-hardened base concrete part 2, as explained in Figure 7(b).

[0121] Furthermore, for the drainage piping device 11 described in Example 1 as shown in Figure 19(a) and the drainage piping device 51 described in Example 2 as shown in Figure 19(b), the pipe axis of at least a part of the pipe body of the drainage piping device 11 (dotted line in Figure 19) can be arranged so as to slope gently downward from the inlet 13A to the outlet 13B, so that water flowing in from the inlet 13A can be suitably guided to the outlet 13B.

[0122] Furthermore, as shown in Figures 19(a) and (b), the outer sleeve pipe 11A and the main pipe 51A are configured so that the pipe axis of other parts is bent relative to the pipe axis of the expanded diameter section 21, but the drainage piping device 11 of Example 1 and the drainage piping device 51 of Example 2 and Modifications 1 to 6 may be arranged so that the pipe axis slopes gently downward from the inlet 13A to the outlet 13B, and the inlet 13A and the outlet 13B may be arranged at an angle to the pipe axis (for example, see the inlet 13A in Figure 19(a)).

[0123] In this way, when the drainage piping device 11, 51 is placed at a predetermined angle of inclination, the end face of the outlet 13B becomes vertical (see Figure 19), so that when the drainage piping device 11, 51 is installed at a predetermined angle of inclination, the outer surface of the foundation and the end face of the outlet 13B can be aligned.

[0124] Furthermore, in Example 2 and Modifications 2 to 6, an embodiment has been described in which the drainage path length L54 can be changed by connecting a connecting pipe 51B to a main pipe 51A and then engaging another connecting pipe 51B, but the present invention is not limited to this, and the drainage path length L54 may be changed by connecting (connecting) multiple pipes in the pipe axis direction regardless of the type of main pipe 51A or connecting pipe 51B. In other words, the drainage path length L54 may be changed by connecting (connecting) multiple connecting pipes 51B in the pipe axis direction in accordance with the thickness of the rising portion 3, without using a main pipe 51A.

[0125] [Actions and Effects] As described above, the drainage piping device 11 in the first embodiment of the present invention is a drainage piping device 11 that connects the space surrounded by the rising portion 3 of the foundation concrete 1 of a building with the outside of the foundation concrete 1, and the length between both end openings of the drainage piping device 11, that is, from the inlet 13A, which is one end opening of the inner sleeve pipe 11B, to the outlet 13B, which is the other end opening of the outer sleeve pipe 11A, can be changed according to the thickness of the rising portion 3. In this way, the length between both end openings of the drainage piping device 11 can be changed according to the thickness of the rising portion 3 of the foundation, so that it is possible to accommodate rising portions of foundations of different thicknesses without having to prepare multiple types of drainage pipes of different lengths.

[0126] Furthermore, the pipe is made up of multiple overlapping pipes (outer sleeve pipe 11A and inner sleeve pipe 11B), and the overlapping range (overlap dimension L3) between the outer sleeve pipe 11A and the inner sleeve pipe 11B can be changed. By changing the overlapping range between the outer sleeve pipe 11A and the inner sleeve pipe 11B in this way, the length from the inlet 13A to the outlet 13B can be changed.

[0127] The overlapping range (overlap dimension L3) can be changed by sliding the inner sleeve tube 11B, which is one of the tubes, relative to the outer sleeve tube 11A, so the overlapping range can be changed with a simple operation.

[0128] The outer sleeve pipe 11A and the inner sleeve pipe 11B are also provided with ridges 32 as locking portions that can lock together, and the locking portions include a plurality of ridges 32 with different overlapping ranges. In this way, by locking the outer sleeve pipe 11A and the inner sleeve pipe 11B together using the ridges 32 that correspond to the thickness of the rising portion 3, it is possible to prevent misalignment between the outer sleeve pipe 11A and the inner sleeve pipe 11B.

[0129] Furthermore, the engaging force of the convex rib portion 32 in the sliding direction that increases the overlap range (overlap dimension L3) is greater than the engaging force in the sliding direction that decreases the overlap range, thereby preventing the length from becoming shorter than the set length during installation.

[0130] Furthermore, in the drainage piping device 11 of variant example 1, the inner sleeve tube 11B is screwed onto the outer sleeve tube 11A, and the overlapping range (overlap dimension L3) can be changed by rotating the inner sleeve tube 11B relative to the outer sleeve tube 11A, so that the overlapping range can be changed with a simple operation.

[0131] Furthermore, by providing a flange portion 33 as a finger hook at the end of the inner sleeve tube 11B that does not overlap with the outer sleeve tube 11A, the overlapping range can be easily changed.

[0132] Furthermore, the drainage piping device 51 of the second embodiment is a drainage piping device 51 that connects the space surrounded by the rising portion 3 of the foundation concrete 1 of a building with the outside of the foundation concrete 1, and is composed of multiple pipe bodies including a main pipe 51A and a connecting pipe 51B, and the length from the inlet 13A to the outlet 13B can be changed by connecting the pipe bodies together, for example, by connecting the main pipe 51A and the connecting pipe 51B or by connecting the connecting pipes 51B together, depending on the thickness of the rising portion 3. In this way, the length between the openings at both ends of the drainage piping device 51 can be changed depending on the thickness of the rising portion 3 of the foundation, so that it is possible to accommodate rising portions of foundations of different thicknesses without having to prepare multiple types of drainage pipes of different lengths.

[0133] Furthermore, the multiple tube bodies include a main tube 51A and a connecting tube 51B, and it is possible to connect the connecting tube 51B to the main tube 51A, and also to connect the connecting tube 51B to the connecting tube 51B. This makes it possible not only to connect the connecting tube 51B to the main tube 51A, but also to connect further connecting tubes 51B to the connecting tube 51B, thereby making it possible to accommodate three or more different lengths.

[0134] Furthermore, by providing anti-termite sheets 11C, 11C' as elastic or non-vulcanized members on the outer surfaces of the outer sleeve pipe 11A and the main pipe 51A, gaps are not formed between the concrete of the rising portion 3 and the outer sleeve pipe 11A or the main pipe 51A, preventing the intrusion of pests such as termites, dust, debris, etc. through the gaps.

[0135] Furthermore, the anti-termite sheets 11C and 11C' contain an anti-termite agent, thereby enhancing the anti-termite effect against termites.

[0136] Furthermore, the anti-termite sheets 11C, 11C' are arranged to cover at least the end (external end) on the outlet 13B side or the vicinity of the end (near the external end) on the outlet 13B side of the outer surface of the outer sleeve pipe 11A or the main pipe 51A, thereby effectively preventing the intrusion of pests such as termites, dust, debris, etc.

[0137] Furthermore, the anti-termite sheets 11C, 11C' include anti-termite sheet 11C' as a first component and anti-termite sheet 11C having a lower hardness than anti-termite sheet 11C, and anti-termite sheet 11C' is provided on the outer surface of the outer sleeve pipe 11A or main pipe 51A at the end on the outlet 13B side (external end) or near the end on the outlet 13B side (near the external end). By providing anti-termite sheet 11C with a relatively higher hardness closer to the inlet 13A side (internal side) than anti-termite sheet 11C', it is possible to prevent the anti-termite sheet from flowing out, while by providing anti-termite sheet 11C with a relatively lower hardness closer to the inlet 13A side than anti-termite sheet 11C', it is possible to reliably prevent gaps from occurring between the foundation concrete and the outer sleeve pipe 11A or main pipe 51A.

[0138] Furthermore, a cover member 12 is attached to the outlet 13B as a closing member for closing the outlet 13B, thereby preventing the intrusion of pests, small animals, dust, garbage, and the like through the outlet 13B.

[0139] In addition, the cover member 12 has a flange portion 41A on its outer peripheral edge, and the flange portion 41A has an inclined surface 41B that slopes in the direction of attachment to the outlet 13B so that it becomes thinner from the center to the outer edge. This makes the boundary between the cover member 12 and the outer surface of the foundation or the decorative surface when decorative treatment is applied less noticeable, improving the design when the cover member 12 is attached to the outlet 13B.

[0140] Furthermore, since the outer diameter of the flange portion 41A is larger than the outer diameter of the outlet 13B, when the cover member 12 is attached to the outlet 13B, the flange portion 41A overlaps with the outer surface of the foundation around the outlet 13B or the decorative surface when decorative treatment is applied, thereby concealing the boundary between the outlet 13B and the outer surface of the foundation or the decorative surface when decorative treatment is applied, thereby improving the design.

[0141] In addition, the cover member 12 has a male thread portion 62 as a threaded portion that screws into the female thread portion 61 formed on the inner surface of the pipe, thereby preventing the cover member 12 from easily unblocking the outlet port 13B.

[0142] In addition, the cover member 12 is provided with a sealing member 43 that fits tightly against the inner surface of the pipe, and when the male threaded portion 62 is screwed into the female threaded portion 61, the sealing member 43 fits tightly against the inner surface of the pipe over a predetermined range closer to the outlet 13B than the range where it screws into the inner surface of the pipe (see Figure 13).This gives a decorative finish to the outer surface of the base, and increases the thickness from the outlet 13B to the outer surface of the base, so that the sealing member 43 can fit tightly against the inner surface of the pipe even when the male threaded portion 62 of the cover member 12 cannot be screwed all the way in.

[0143] Although Examples 1 and 2 and Modifications 1 to 7 of the present invention have been described above with reference to the drawings, the specific configurations are not limited to these Examples, and modifications and additions that do not deviate from the gist of the present invention are also included in the present invention. [Explanation of symbols]

[0144] 1. Foundation concrete 2. Concrete base 3. Rising section 10 Underfloor drainage structure 11 Drainage piping device 11A Outer sleeve pipe (pipe body) 11B Inner sleeve pipe (pipe body) 12 Lid member 13A Inlet 13B Outlet 51 Water drainage piping device 51A Main tube (tube body) 51B Connecting pipe (pipe body)

Claims

1. A drainage piping device that connects a space surrounded by the rising part of a building foundation with the outside of the foundation, The length between the openings at both ends of the drainage piping device can be changed depending on the thickness of the rising portion, A closing member for closing the external opening is attached to the opening, and the closing member has an engaging portion that engages with the inner surface of the pipe and a sealing member that contacts the inner surface of the pipe, and when the engaging portion is engaged, the sealing member contacts the inner surface of the pipe over a predetermined range on the external opening side beyond the range where it engages with the inner surface of the pipe. A water drainage piping device characterized by the above.

2. the closure member includes a flange; The flange has an outer diameter larger than the outer diameter of the outer opening, and has an inclined surface that is inclined toward the attachment direction to the outer opening so that the flange becomes thinner from the center side to the outer edge side. The drainage piping device according to claim 1 .

3. When the pipe is placed at a predetermined angle, the end face of the external opening is vertical.

3. The drainage piping device according to claim 1 or 2.

4. The tube is provided with an elastic member or a non-vulcanized member containing an anti-termite agent on the outer circumferential surface of the tube.

4. The drainage piping device according to claim 1, wherein the drainage piping device is a water drainage pipe.

5. It consists of multiple pipes that overlap each other, The length between the openings at both ends of the drainage piping device can be changed by changing the overlapping range of the pipes.

5. The drainage piping device according to claim 1.

6. It consists of multiple tubes, The length between the openings at both ends of the drainage piping device can be changed by connecting the pipes together.

5. The drainage piping device according to claim 1.

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