Foundation Penetration Sleeve

Abstract

To easily provide a drainage gradient to a pipe installed on a foundation, thereby making it difficult for water to accumulate in the pipe.SOLUTION: A foundation penetrating sleeve 1 includes a cylindrical member 2, an outdoor-side annular packing 3 provided on the cylindrical member 2, and an indoor-side annular packing 4 provided on the cylindrical member 2. The center of an outdoor-side hole 3c formed in the outdoor-side annular packing 3 and into which a pipe 200 is inserted is positioned lower than the center of an indoor-side hole 4c formed in the indoor-side annular packing 4 and into which the pipe 200 is inserted.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a foundation penetration sleeve that is installed to penetrate the foundation of, for example, a building, and a drainage structure using the foundation penetration sleeve. [Background technology]

[0002] In some cases, through-holes are formed in the foundation of a building to allow piping to pass from the outside to the inside of the building or vice versa. When forming these through-holes, void pipes made of paper tubular members or tubular members made of resin, metal, or ceramics as disclosed in Patent Document 1 are used.

[0003] When forming a foundation through-hole using the above-mentioned tubular member, first, the tubular member is fixed to reinforcing bars before pouring the concrete that will form the foundation. Then, formwork is installed so as to close the indoor opening and outdoor opening of the tubular member. Concrete is poured into the installed formwork, and after the concrete has hardened, the formwork is removed. Then, if a void pipe is used, the void pipe is removed, but if the foundation penetration sleeve of Patent Document 1 is used, the tubular member is left in place. The tubular member is provided with an outdoor-side annular gasket and an indoor-side annular gasket. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-52282 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, Patent Document 1 assumes that the foundation-penetrating sleeve is installed horizontally. When the foundation-penetrating sleeve is installed horizontally, the outdoor-side annular gasket and the indoor-side annular gasket are installed at the same height, and as a result, the holes in the outdoor-side annular gasket and the indoor-side annular gasket are also installed at the same height. Therefore, the piping inserted through the holes in the outdoor-side annular gasket and the holes in the indoor-side annular gasket are also installed horizontally. When the piping is installed horizontally, no slope for drainage is provided, making it difficult for water to drain from the piping, and there is a possibility that water may accumulate in the piping. This poses a problem: attempting to set a drainage slope after installation requires additional work.

[0006] The present disclosure has been made in consideration of such points, and its purpose is to make it easy to impart a drainage gradient to pipes installed in foundations, thereby making it less likely for water to accumulate within the pipes. [Means for solving the problem]

[0007] To achieve the above object, one aspect of the present disclosure can be based on a foundation penetration sleeve for forming a through hole for passing a pipe through the foundation of, for example, various buildings. The foundation penetration sleeve includes a tubular member extending in the thickness direction of the foundation and having the through hole, an outdoor-side annular gasket provided on the periphery of an outdoor-side opening of the tubular member and abutting against the inner surface of an outdoor formwork, and an indoor-side annular gasket provided on the periphery of an indoor-side opening of the tubular member and abutting against the inner surface of an indoor formwork. The center of the outdoor-side hole formed in the outdoor-side annular gasket and into which the pipe is inserted is positioned below the center of the indoor-side hole formed in the indoor-side annular gasket and into which the pipe is inserted.

[0008] With this configuration, once the foundation penetration sleeve is installed in the foundation, the pipes are inserted into the holes in the outdoor annular packing and the indoor annular packing to complete the installation. Because the height of the center of the outdoor hole where the pipe is inserted is lower than the height of the center of the indoor hole, the pipe is inclined so that the outdoor side is lower than the indoor side, and this inclination angle of the pipe creates a drainage gradient. Therefore, water that flows into the pipe from the indoor side of the foundation is smoothly drained to the outdoor side.

[0009] The outdoor annular packing may also include an outdoor annular portion extending circumferentially along the outdoor side of the outer peripheral surface of the tubular member, and an annular outdoor cover portion extending radially inward from the outdoor end of the outdoor annular portion. In this case, the outdoor hole may be a circular hole surrounded by the inner peripheral edge of the outdoor cover portion, and the center of the outdoor hole may be positioned below the radial center of the tubular member. With this configuration, a drainage gradient can be imparted to the piping by the shape of the outdoor annular packing, making it easy to obtain a structure that is less likely to produce accumulated water in the piping.

[0010] The indoor-side annular gasket may also include an indoor-side annular portion extending circumferentially along the indoor side of the outer circumferential surface of the tubular member, and an annular indoor-side covering portion extending radially inward from the indoor-side end of the indoor-side annular portion. In this case, the indoor-side hole may be a circular hole surrounded by the inner periphery of the indoor-side covering portion, and the center of the indoor-side hole may be positioned above the radial center of the tubular member. With this configuration, a drainage gradient can be imparted to the piping by the shape of the indoor-side annular gasket, making it easy to obtain a structure that is less likely to produce accumulated water in the piping.

[0011] The cylindrical member can be installed so that its center line is horizontal. With this configuration, the installation work can be simplified because the cylindrical member only needs to be installed horizontally at the site.

[0012] The outdoor annular packing and the indoor annular packing may be made of an elastic material containing an anti-termite component. With this configuration, the anti-termite material is interposed between the tubular member and the foundation, thereby achieving a high anti-termite effect.

[0013] In another aspect of the present disclosure, a drainage structure can be provided that includes a pipe for draining water from the indoor side of the foundation to the outdoor side, and a foundation penetration sleeve for forming a through hole in the foundation through which the pipe passes. In this case, too, the center of the outdoor side hole in the outdoor side annular packing is positioned lower than the center of the indoor side hole in the indoor side annular packing, so that a drainage gradient can be easily imparted to the pipe. [Effects of the Invention]

[0014] As explained above, since the height of the center of the outdoor hole of the foundation-penetrating sleeve is set lower than the height of the center of the indoor hole, simply by installing the foundation-penetrating sleeve on the foundation and inserting the pipes into the outdoor hole and the indoor hole, a drainage gradient can be easily created, making it difficult for water to accumulate in the pipes. Therefore, there is no need to perform the work of creating a drainage gradient after installing the foundation-penetrating sleeve. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a cross-sectional view of a foundation showing an example of a drainage structure using a foundation penetration sleeve according to an embodiment of the present invention. [Figure 2] FIG. 2 is a side view of the foundation through-sleeve. [Figure 3] FIG. 3 is a longitudinal cross-sectional view of a foundation through-sleeve. [Figure 4] FIG. 4 is a cross-sectional view of the indoor annular packing. [Figure 5] FIG. 5 is a view of the indoor-side annular packing from the indoor side. [Figure 6] FIG. 6 is a cross-sectional view of the outdoor-side annular packing. [Figure 7] FIG. 7 is a view of the outdoor-side annular packing from the outdoor side. [Figure 8]FIG. 8 is a diagram showing the state in which the foundation penetration sleeve is fixed to the reinforcing bar and the formwork is installed. [Figure 9] FIG. 9 is a view corresponding to FIG. 3 according to the first modification of the embodiment. [Figure 10] FIG. 10 is a view corresponding to FIG. 3 according to the second modification of the embodiment. [Figure 11] FIG. 11 is a view corresponding to FIG. 1 according to the third modification of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the present invention, its applications, or its uses.

[0017] FIG. 1 is a cross-sectional view showing an example of a foundation 100 in which a foundation through-hole 10 is formed using a foundation through-hole sleeve 1 according to an embodiment of the present invention. In FIG. 1, reference numeral 300 indicates a base plate made of, for example, concrete. The portion indicated by reference numeral 300 may be the ground. The foundation 100 is a foundation for a building such as a house, office, or warehouse. The foundation 100 has an outdoor side (left side of FIG. 1) facing the outdoors and an indoor side (right side of FIG. 1) facing the indoors. The thickness of the foundation 100 can be set to any thickness to suit the building, etc., and the height of the foundation 100 can also be set to any height to suit the building, etc.

[0018] The foundation penetration hole 10 formed by the foundation penetration sleeve 1 is a hole for passing, for example, a drainage pipe 200 from the indoor side to the outdoor side or from the outdoor side to the indoor side. The pipe 200 can be, for example, a PVC pipe made of polyvinyl chloride, but is not limited to this. It can also be a bendable pipe such as a hose, or a pipe through which electrical wiring or communication lines pass. This is because water can also flow into pipes through which electrical wiring or communication lines pass. The diameter of the foundation penetration hole 10 can be set to match the diameter of the pipe 200 that will pass through it, and is generally set to be sufficiently larger than the diameter of the pipe 200.

[0019] The foundation 100 has a plurality of main reinforcements 400 extending in the vertical direction and a plurality of distribution reinforcements 401 extending in the horizontal direction. The plurality of main reinforcements 400 are provided at intervals from one another in the direction in which the foundation 100 extends. The plurality of distribution reinforcements 401 extend horizontally to connect the main reinforcements 400, and are provided at intervals from one another in the up-down direction. The main reinforcements 400 and distribution reinforcements 401 are so-called reinforcing bars.

[0020] The foundation 100 also has a concrete portion 403 that protrudes upward from the base plate 300. Main reinforcement bars 400 and distribution reinforcement bars 401 are embedded inside the concrete portion 403. The thickness direction of the foundation 100 is the left-right direction in FIG.

[0021] (Configuration of foundation penetration sleeve 1) As shown in Figures 2 and 3, the foundation penetration sleeve 1 includes a tubular member 2 extending in the thickness direction of the foundation 100 and having a through-hole 10, an outdoor-side annular gasket 3, an indoor-side annular gasket 4, and an anti-termite material 5. The tubular member 2 can be a circular tubular member made of, for example, a hard resin or metal material, and is installed so that its center line is horizontal. The tubular member 2 only needs to be rigid enough not to deform due to the weight or flow pressure of the concrete when it is poured, as described below, and can be made of, for example, a PVC pipe made of polyvinyl chloride. The anti-termite material 5 may be omitted.

[0022] 1, the length of the cylindrical member 2 is set so that the cylindrical member 2 extends from near the outdoor surface of the foundation 100 to near the indoor surface. The diameter of the cylindrical member 2 is the same from the indoor side to the outdoor side. The thickness of the cylindrical member 2 can be, for example, several millimeters or more.

[0023] The opening located on the outdoor side of the cylindrical member 2 is the outdoor opening (one end opening) 2a. On the other hand, the opening located on the indoor side of the cylindrical member 2 is the indoor opening (the other end opening) 2b. The outdoor opening 2a and the indoor opening 2b are circular and have the same diameter.

[0024] The middle portion of the tubular member 2 in the center line direction is the fixed portion 2c that is fixed to the reinforcing bars 401 (shown in FIG. 1 ) of the foundation 100. The fixed portion 2c may include the central portion in the center line direction of the tubular member 2, or may be a portion that deviates from the central portion toward the indoor side, or may be a portion that deviates from the central portion toward the outdoor side. The fixed portion 2c may also be a predetermined area that extends in the center line direction, and part of this area can be fixed to the reinforcing bars 401.

[0025] A fixing device 410 can be used to fix the fixed part 2c to the distribution reinforcement 401. The fixing device 410 has an upper engaging part 410a that engages with the distribution reinforcement 401 and a ring-shaped part 410b formed to surround the outer circumferential surface of the fixed part 2c. The ring-shaped part 410b can fix the fixed part 2c to the fixed part 2c by tightening the outer circumferential surface of the fixed part 2c. The upper part of the ring-shaped part 410b is integrated with the lower part of the upper engaging part 410a. The upper engaging part 410a may be configured to be fastened to the distribution reinforcement 401. The fixing device 410 can be configured, for example, from a bundling wire such as copper wire, or it may be configured from a sheet metal member.

[0026] 4 and 5 show the indoor-side annular gasket 4 alone. Also, FIGS. 6 and 7 show the outdoor-side annular gasket 3 alone. The indoor-side annular gasket 4 is provided on the periphery of the indoor-side opening 2b in the tubular member 2 as shown in FIG. 2, and is a component that abuts against the inner surface of the indoor-side formwork 450 (shown in FIG. 8). Examples of materials that can be used to form the indoor-side annular gasket 4 include elastic materials made of rubber such as ethylene propylene rubber (EPT) or thermoplastic elastomer. The elastic material contains an anti-termite component. The anti-termite component is a component that prevents ants from invading from outdoors and is a conventionally well-known component. Furthermore, a conventionally well-known method can be used to incorporate the anti-termite component into the elastic material.

[0027] The indoor-side annular packing 4 includes a plate-shaped indoor-side annular portion 4a that extends in a circular direction along the indoor-side opening 2b side of the outer circumferential surface of the tubular member 2, and an annular indoor-side covering portion 4b that extends radially inward from the indoor-side end of the indoor-side annular portion 4a and covers the radially outer portion of the indoor-side opening 2b. The indoor-side side of the tubular member 2 fits inside the indoor-side annular portion 4a, and the indoor-side annular packing 4 can be attached to the tubular member 2 by fitting the indoor-side side of the tubular member 2 inside the indoor-side annular portion 4a. In this attached state, the inner surface of the indoor-side annular packing 4 and the outer circumferential surface of the tubular member 2 are in close contact with each other, ensuring watertightness. The radial center of the indoor-side annular packing 4 (the center line of the indoor-side annular packing 4) and the center line of the tubular member 2 coincide with each other.

[0028] 1, the indoor side annular portion 4a is a portion that is buried in the concrete portion 403. The concrete portion 403 contacts the radially outer side of the indoor side annular portion 4a, while the tubular member 2 contacts the radially inner side of the indoor side annular portion 4a. Therefore, the indoor side annular portion 4a is sandwiched between the concrete portion 403 and the tubular member 2 in the thickness direction.

[0029] 4 and 5, the indoor-side covering portion 4b is annular, and the circular hole surrounded by the inner periphery of the indoor-side covering portion 4b is the indoor-side hole 4c. The indoor-side hole 4c communicates with the indoor side of the through-hole 10 formed inside the tubular member 2. The diameter of the indoor-side hole 4c is set smaller than the outer diameter of the piping 200, so that the outer surface of the piping 200 comes into contact with the inner surface of the indoor-side covering portion 4b, i.e., the inner surface of the indoor-side hole 4c. This allows the indoor-side annular gasket 4 to seal between the piping 200 and the tubular member 2.

[0030] The tip (inner peripheral edge) of the indoor covering portion 4b in the extension direction forms the inner peripheral surface of the indoor-side hole 4c. As shown in FIG. 4, the tip of the indoor covering portion 4b in the extension direction is provided with a protrusion 4d that protrudes radially inward and extends continuously in the circumferential direction. A plurality of protrusions 4d can be provided so as to be aligned in the center line direction of the indoor annular packing 4, but only one protrusion 4d may be provided. The portion that contacts the outer peripheral surface of the piping 200 may be only the tip of the protrusion 4d. Because the protrusion 4d is made of an elastic material, it can elastically deform to fit along the outer peripheral surface of the piping 200 while in contact with the outer peripheral surface, thereby eliminating any gap between the outer peripheral surface of the piping 200 and the protrusion 4d around the entire circumference.

[0031] The indoor side annular portion 4a is formed with an annular indoor side protruding portion 4e that protrudes outdoors in the direction of the centerline and abuts against the inner surface of the outdoor side formwork 450. The indoor side protruding portion 4e is continuous in the circumferential direction of the indoor side annular portion 4a and elastically deforms when abutting against the inner surface of the indoor side formwork 450, eliminating the gap between the indoor side formwork 450 and the inner surface of the indoor side formwork 450 over the entire circumference.

[0032] The portion of the indoor side annular packing 4 that is embedded in the concrete portion 403 is provided with inlet holes 4f through which concrete flows during pouring. Specifically, a plurality of inlet holes 4f are provided in the indoor side annular portion 4a of the indoor side annular packing 4 at intervals from one another in the circumferential direction of the indoor side annular packing 4. Each inlet hole 4f is formed to open on the outer circumferential surface of the indoor side annular portion 4a. The inlet holes 4f also penetrate the indoor side annular portion 4a in its radial direction. Note that the inlet holes 4f do not have to penetrate the indoor side annular portion 4a, and the inlet holes 4f may be constituted by blind holes formed in the outer circumferential surface of the indoor side annular portion 4a.

[0033] 4 and 5 show an example in which four inlet holes 4f are provided. In this case, a total of four inlet holes 4f are provided at 90° intervals at the top, bottom, and both sides of the indoor annular portion 4a. The multiple inlet holes 4f do not have to be provided at equal intervals, and may be provided at unequal intervals. The number of inlet holes 4f may be one or any multiple number. Furthermore, the inlet hole 4f may be provided at the top, bottom, or both sides of the indoor annular portion 4a, or at an obliquely upper or lower portion of the indoor annular portion 4a.

[0034] As shown in Figure 3, the shape of the inlet holes 4f is circular. The inner diameter of the inlet holes 4f is set to, for example, 10 mm or more, or 15 mm or more. This makes it easier for concrete to flow into the inlet holes 4f during pouring. The shape of the inlet holes 4f is not limited to circular, but may be elliptical or polygonal. All of the inlet holes 4f may have the same shape, or may have different shapes.

[0035] As shown in Fig. 3, the outdoor-side annular packing 3 is provided on the periphery of the outdoor-side opening 2a of the cylindrical member 2, and is a member that abuts against the inner surface of the outdoor formwork 451 shown in Fig. 8. The material that constitutes the outdoor-side annular packing 3 can be the same as the material that constitutes the indoor-side annular packing 4, but the materials may be different. Furthermore, the indoor-side annular packing 4 and the outdoor-side annular packing 3 may be made of the same material or different materials.

[0036] The outdoor-side annular packing 3 includes an outdoor-side annular portion 3a that extends in a circle in the circumferential direction along the outdoor-side opening 2a side of the outer circumferential surface of the tubular member 2, and an annular outdoor-side cover portion 3b that extends radially inward from the indoor-outside end of the outdoor-side annular portion 3a and covers the radially outer portion of the outdoor-side opening 2a. The outdoor side of the tubular member 2 fits inside the outdoor-side annular portion 3a, and the outdoor-side annular packing 3 can be attached to the tubular member 2 by fitting the outdoor side of the tubular member 2 inside the outdoor-side annular portion 3a. In this attached state, the inner surface of the outdoor-side annular packing 3 and the outer circumferential surface of the tubular member 2 are in close contact, ensuring watertightness.

[0037] The outdoor-side cover portion 3b has an annular shape, and a circular hole surrounded by the inner peripheral edge of the outdoor-side cover portion 3b is the outdoor-side hole 3c. The outdoor-side hole 3c communicates with the outdoor side of the through-hole 10 formed inside the tubular member 2. As shown in FIG. 1 , the diameter of the outdoor-side hole 3c is set smaller than the outer diameter of the pipe 200, so that the outer peripheral surface of the pipe 200 comes into contact with the outdoor-side cover portion 3b. This allows the outdoor-side annular packing 3 to seal between the pipe 200 and the tubular member 2. The tip of the outdoor-side cover portion 3b in the extension direction forms the inner peripheral surface of the outdoor-side hole 3c and is made of an elastic material. Therefore, it can elastically deform to fit along the outer peripheral surface of the pipe 200 while in contact with the outer peripheral surface, eliminating any gaps.

[0038] The outdoor annular portion 3a is formed with a ring-shaped outdoor protruding portion 3e that protrudes outdoors in the direction of the centerline and abuts against the inner surface of the outdoor formwork 451. The outdoor protruding portion 3e is continuous in the circumferential direction of the outdoor annular portion 3a, and elastically deforms when it abuts against the inner surface of the outdoor formwork 451, eliminating any gap between it and the inner surface of the outdoor formwork 451. The outdoor annular portion 3a is provided with inlet holes 3f similar to the inlet holes 4f of the indoor annular portion 4a.

[0039] As shown in FIG. 2, the anti-termite material 5 is a conventionally known material made of a sheet of butyl rubber containing an anti-termite component. An example of butyl rubber containing an anti-termite component is disclosed in Japanese Patent No. 5537061. The thickness of the anti-termite material 5 can be set to, for example, approximately 3 mm, and the width of the anti-termite material 5 can be set to approximately 100 mm. The anti-termite material 5 is provided so as to surround the outer surface of the tubular member 2, tightly adhering to the outer surface of the tubular member 2 without any gaps, and is embedded in the foundation 100 as shown in FIG. 1 so that no gaps are formed between the anti-termite material 5 and the concrete. This prevents outdoor ants from invading indoors through the gap between the foundation-penetrating sleeve 1 and the foundation 100.

[0040] The anti-termite material 5 is provided in the middle of the cylindrical member 2 in the center line direction, but is not limited to this and may be provided offset in one direction in the center line direction from the fixed portion 2c of the cylindrical member 2. By offsetting the anti-termite material 5 toward the indoor side from the fixed portion 2c, it is possible to prevent the anti-termite material 5 from getting in the way when fixing the fixed portion 2c to the reinforcing bars 401. The anti-termite material 5 may also be offset toward the outdoor side from the fixed portion 2c.

[0041] The shapes of the outdoor-side annular packing 3 and the indoor-side annular packing 4 are not limited to those described above, and the tip end of the outdoor-side cover part 3b of the outdoor-side annular packing 3 may be formed thinner than the base end, which makes it easier to deform along the outer circumferential surface of the piping 200.

[0042] The point indicated by the symbol A in Fig. 5 is the radial center of the indoor-side annular portion 4a, which becomes the radial center of the tubular member 2 when the indoor-side annular packing 4 is attached to the tubular member 2. On the other hand, the point indicated by the symbol B in Fig. 5 is the radial center of the indoor-side hole 4c. In this way, the center B of the indoor-side hole 4c is positioned above the radial center of the tubular member 2. The eccentricity E of the radial center B of the indoor-side hole 4c relative to the radial center A of the indoor-side annular portion 4a can be set in the range of, for example, 1 mm to 10 mm, but is not limited to this range.

[0043] The point indicated by the symbol C in Fig. 7 is the radial center of the outdoor-side annular portion 3a, and becomes the radial center of the cylindrical member 2 when the outdoor-side annular packing 3 is attached to the cylindrical member 2. On the other hand, the point indicated by the symbol D in Fig. 7 is the radial center of the outdoor-side hole 3c. In this way, the center D of the outdoor-side hole 3c is positioned below the radial center of the cylindrical member 2.

[0044] When the cylindrical member 2 is installed horizontally with the indoor-side annular packing 4 and the outdoor-side annular packing 3 attached to it, the radial center A of the indoor-side annular portion 4a and the radial center C of the outdoor-side annular portion 3a are positioned at the same height. Meanwhile, the radial center D of the outdoor-side hole 3c is positioned lower than the radial center B of the indoor-side hole 4c. The eccentricity F of the radial center D of the outdoor-side hole 3c relative to the radial center C of the outdoor-side annular portion 3a can be set, for example, in the range of 1 mm to 10 mm, but is not limited to this range. The eccentricity E and the eccentricity F may be the same or different.

[0045] The outdoor-side annular packing 3 and the indoor-side annular packing 4 can be common components, and the component described as the outdoor-side annular packing 3 can be attached to the indoor side and used, and the component described as the indoor-side annular packing 4 can be attached to the outdoor side and used. As shown in FIG. 5 , the indoor-side covering portion 4b of the indoor-side annular packing 4 has an upper marker portion 40 at the top of its indoor-side surface and a lower marker portion 41 at the bottom. The upper marker portion 40 indicates that the side on which the upper marker portion 40 is provided is the upper side when the indoor-side annular packing 4 is attached to the indoor side of the tubular member 2. The lower marker portion 41 indicates that the side on which the lower marker portion 41 is provided is the upper side when the indoor-side annular packing 4 is attached to the outdoor side. Only one of the upper marker portion 40 and the lower marker portion 41 may be provided. Alternatively, the upper marker portion 40 and the lower marker portion 41 may be provided on the outer circumferential surface of the indoor-side annular portion 4a. By providing the markings 40, 41 on the outer peripheral surface of the indoor side annular portion 4a, it is possible to visually check from above during installation whether the indoor side annular packing 4 is facing in the correct direction.

[0046] As shown in FIG. 7 , the outdoor-side cover portion 3b of the outdoor-side annular packing 3 has an upper marker portion 30 at the top of its outdoor-side surface and a lower marker portion 31 at the bottom. The upper marker portion 30 indicates that the side where the upper marker portion 30 is provided is the upper side when the outdoor-side annular packing 3 is attached to the outdoor side of the tubular member 2. The lower marker portion 31 indicates that the side where the lower marker portion 31 is provided is the upper side when the outdoor-side annular packing 3 is attached to the indoor side. Only one of the upper marker portion 30 and the lower marker portion 31 may be provided. Alternatively, the upper marker portion 30 and the lower marker portion 31 may be provided on the outer peripheral surface of the outdoor-side annular portion 3a. By providing the marker portions 30 and 31 on the outer peripheral surface of the outdoor-side annular portion 3a, it is possible to visually check from above whether the orientation of the outdoor-side annular packing 3 is correct during installation.

[0047] The upper marker portion 40, the lower marker portion 41, the upper marker portion 30, and the lower marker portion 31 may be configured with, for example, any one of letters, symbols, pictures, colors, etc., or may be configured with any two or more of these in combination. That is, it is sufficient that each marker portion 40, 41, 30, 31 is configured in a form that allows for discrimination of, for example, top, bottom, outside, inside, etc. Since providing each marker portion 40, 41, 30, 31 in a position that can be seen even after the concrete has been poured makes inspection easier, it is preferable to provide it on the indoor-side covering portion 4b and the outdoor-side covering portion 3b.

[0048] (Construction instructions) Next, we will explain the construction procedure for the foundation 100 using the foundation-penetrating sleeve 1 configured as described above. First, as shown in Figure 2, the foundation-penetrating sleeve 1 is prepared. Because the tubular member 2, outdoor-side annular packing 3, and indoor-side annular packing 4 that make up the foundation-penetrating sleeve 1 are separate components, the outdoor-side annular packing 3 and indoor-side annular packing 4 are assembled and integrated into the tubular member 2. At this time, the outdoor side of the tubular member 2 is fitted inside the outdoor-side annular portion 3a of the outdoor-side annular packing 3. However, because the outdoor-side annular portion 3a has an inlet hole 3f and is a lightened portion, only a small force is required to deform the outdoor-side annular portion 3a. This allows the outdoor-side annular packing 3 to be easily assembled to the tubular member 2.

[0049] 8, the main reinforcement 400 and the distribution reinforcement 401 are installed, and the foundation-penetrating sleeve 1 is fixed to the distribution reinforcement 401 using a fixing device 410. When the foundation-penetrating sleeve 1 is fixed to the distribution reinforcement 401, the center line of the tubular member 2 is horizontal.

[0050] After the foundation penetrating sleeve 1 is fixed to the reinforcing bars 401, the indoor formwork 450 and the outdoor formwork 451 are installed. The inner surface of the indoor formwork 450 abuts against the indoor side protruding portion 4e of the indoor side annular packing 4. The indoor side protruding portion 4e elastically deforms to fit along the inner surface of the indoor formwork 450, eliminating any gap between the inner surface of the indoor side formwork 450 and the indoor side annular packing 4. The indoor side formwork 450 and the outdoor side formwork 451 can be installed in any order.

[0051] The inner surface of the outdoor formwork 451 abuts against the outdoor protruding portion 3e of the outdoor annular packing 3. The outdoor protruding portion 3e elastically deforms to fit along the inner surface of the outdoor formwork 451, eliminating any gap between the inner surface of the outdoor formwork 451 and the outdoor annular packing 3.

[0052] Next, concrete is poured between the outdoor formwork 450 and the indoor formwork 451 and allowed to flow. Because the foundation-penetrating sleeve 1 is fixed to the reinforcing bars 401, displacement of the foundation-penetrating sleeve 1 due to the flow pressure of the concrete is suppressed. Furthermore, because the tubular member 2 has sufficient rigidity, it is not deformed by the weight or flow pressure of the concrete. Furthermore, because there are no gaps between the inner surface of the indoor formwork 450 and the indoor annular gasket 4, or between the inner surface of the outdoor formwork 451 and the outdoor annular gasket 3, concrete is less likely to seep into the tubular member 2. Furthermore, the poured concrete flows into the inlet holes 4f of the indoor annular gasket 4. Since the inlet holes 4f penetrate the indoor annular portion 4a, the concrete that flows into the inlet holes 4f reaches the outer surface of the tubular member 2. Concrete also flows into the inlet holes 3f of the outdoor annular gasket 3.

[0053] After the concrete has hardened, the indoor formwork 450 and the outdoor formwork 451 are removed to obtain the foundation 100 with the foundation penetration sleeve 1 embedded therein. Because it is difficult for concrete to enter the interior of the tubular member 2, the formation of the through hole 10 is not hindered, and the intended through hole 10 can be obtained. The concrete that has flowed into the inlet holes 3f, 4f hardens inside the inlet holes 3f, 4f.

[0054] Thereafter, as shown in FIG. 1 , the piping 200 is passed through the through-hole 10. At this time, when passing the piping 200 from the indoor side to the outdoor side, as indicated by the white arrow 500 in FIG. 1 , the piping 200 is first inserted into the hole 4c of the indoor-side annular packing 4. At this time, frictional force acts between the inner circumferential surface of the hole 4c of the indoor-side annular packing 4 and the outer circumferential surface of the piping 200. However, since the concrete that has flowed into the inlet hole 4f of the indoor-side annular packing 4 has solidified inside the inlet hole 4f, the solidified concrete in the inlet hole 4f acts like an anchor, fixing the indoor-side annular packing 4 to the concrete portion 403. This holds the indoor-side annular packing 4 in a predetermined position, so that the indoor-side annular packing 4 will not fall off even if the piping 200 presses the indoor-side annular packing 4 strongly toward the outdoor side.

[0055] When the pipe 200 is inserted into the hole 4c of the indoor-side annular packing 4 and then into the hole 3c of the outdoor-side annular packing 3, a frictional force acts between the inner peripheral surface of the hole 3c of the outdoor-side annular packing 3 and the outer peripheral surface of the pipe 200. At this time, since the inner peripheral surface of the hole 3c of the outdoor-side annular packing 3 is made to tightly adhere to the outer peripheral surface of the pipe 200 to prevent water from entering from the outside, the outdoor-side annular packing 3 is pressed strongly toward the outdoor side.

[0056] In this embodiment, the concrete that has flowed into the inlet 3f of the outdoor-side annular packing 3 solidifies inside the inlet 3f, and the solidified concrete inside the inlet 3f acts like an anchor, fixing the outdoor-side annular packing 3 to the concrete part 403. This holds the outdoor-side annular packing 3 in place, so that even if the outdoor-side annular packing 3 is pressed strongly toward the outdoor side by the piping 200, the outdoor-side annular packing 3 will not fall off. Note that the insertion direction of the piping 200 may be reversed, and the piping may be inserted from the outdoor side.

[0057] Furthermore, the outdoor-side annular packing 3 and the indoor-side annular packing 4 have anti-termite properties, which can enhance the effect of preventing ant invasion.

[0058] When the pipe 200 is inserted into the indoor hole 3c and the outdoor hole 4c, the center D of the outdoor hole 4c is positioned lower than the center B of the indoor hole 4c, so the pipe 200 is installed at an incline so that it is positioned lower as it approaches the outdoor side. The inclination angle of the pipe 200 creates a drainage slope that allows indoor water to be drained outdoors. Therefore, water that flows into the pipe 200 from the indoor side of the foundation 100 is smoothly drained to the outdoor side.

[0059] A drainage structure 600 (shown in FIG. 1) according to the present invention includes a pipe 200 and a foundation-penetrating sleeve 1. In addition to the pipe 200 and the foundation-penetrating sleeve 1, the drainage structure 600 may include any one or more of a foundation 100, a base plate 300, main reinforcement 400, reinforcing bars 401, and fixing devices 410.

[0060] (Variation) 9 shows a foundation-penetrating sleeve 1 according to a first modified example of the embodiment. In this first modified example, the radial center of the outdoor-side annular portion 3a of the outdoor-side annular packing 3 and the radial center of the outdoor-side hole 3c are at the same height. The center of the indoor-side hole 4c is positioned higher than the radial center of the indoor-side annular portion 4a, so when the piping 200 is inserted, the piping 200 is tilted downward as it approaches the outdoor side.

[0061] 10 shows a foundation-penetrating sleeve 1 according to a second modification of the embodiment. In this second modification, the radial center of the indoor-side annular portion 4a of the indoor-side annular packing 4 and the radial center of the indoor-side hole 4c are at the same height. The center of the outdoor-side hole 4c is positioned lower than the radial center of the outdoor-side annular portion 3a, so when the piping 200 is inserted, the piping 200 is tilted downward as it moves toward the outdoor side.

[0062] FIG. 11 shows a foundation-penetrating sleeve 1 according to a third modification of the embodiment. The indoor-side annular gasket 4 of this third modification has an annular flange portion 4h that protrudes radially and extends continuously in the circumferential direction. The flange portion 4h has an inlet hole 4g through which concrete can flow, formed to pass through in the thickness direction. The outdoor-side annular gasket 3 has an annular flange portion 3h that protrudes radially and extends continuously in the circumferential direction. The flange portion 3h has an inlet hole 3g through which concrete can flow, formed to pass through in the thickness direction. A flange portion may be provided on only one of the outdoor-side annular gasket 3 and the indoor-side annular gasket 4.

[0063] The above-described embodiments are merely examples in all respects and should not be construed as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention. [Industrial Applicability]

[0064] As described above, the foundation penetration sleeve and drainage structure according to the present disclosure can be used, for example, in the foundations of various buildings. [Explanation of symbols]

[0065] 1 Foundation penetration sleeve 2. Cylindrical member 3 Outdoor side annular packing 3a Outdoor circular section 3b Outdoor cover 3c Outdoor hole 4 Indoor annular packing 4a Indoor circular section 4b Indoor covering part 4c Indoor hole 200 Piping 600 Drainage structure

Claims

1. A foundation penetration sleeve for forming a through hole through which piping passes in a foundation, a cylindrical member extending in the thickness direction of the foundation and having the through hole; an outdoor-side annular gasket provided on a peripheral edge of the outdoor-side opening of the cylindrical member and abutting against an inner surface of the outdoor-side formwork; an indoor-side annular packing provided on the periphery of the indoor-side opening of the cylindrical member and abutting against the inner surface of the indoor-side formwork, the center of an outdoor-side hole formed in the outdoor-side annular packing and into which the piping is inserted is positioned lower than the center of an indoor-side hole formed in the indoor-side annular packing and into which the piping is inserted; the outdoor-side annular packing includes an outdoor-side annular portion extending circumferentially along the outdoor side of the outer peripheral surface of the tubular member, and an annular outdoor-side cover portion extending radially inward from an outdoor-side end of the outdoor-side annular portion, The circular hole surrounded by the inner peripheral edge of the outdoor-side cover part is the outdoor-side hole, A foundation-penetrating sleeve, wherein the center of the outdoor hole is positioned below the radial center of the tubular member.

2. The foundation penetration sleeve according to claim 1, the indoor-side annular gasket includes an indoor-side annular portion extending circumferentially along the indoor-side side of the outer peripheral surface of the tubular member, and an annular indoor-side covering portion extending radially inward from an indoor-side end of the indoor-side annular portion, The circular hole surrounded by the inner peripheral edge of the indoor side covering part is the indoor side hole, A foundation-penetrating sleeve, wherein the center of the indoor hole is positioned above the radial center of the tubular member.

3. The foundation penetration sleeve according to claim 1, The tubular member is a foundation-penetrating sleeve that is installed so that the center line of the tubular member is horizontal.

4. The foundation penetration sleeve according to claim 1, The foundation penetration sleeve, wherein the outdoor annular gasket and the indoor annular gasket are made of an elastic material containing an anti-termite component.

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