Water cut-off structure and water cut-off method of through hole

Abstract

To provide a water cut-off structure of a through hole which can inhibit deterioration of sealing materials to maintain water cut-off performance.SOLUTION: A water cut-off structure of a through hole includes: a resin socket which is inserted into a through hole of a hollow panel from one side in a plate thickness direction and has a first flange at a base end part; and a resin pipe which is inserted into the through hole from the other side in the plate thickness direction and in which at least a tip is inserted into the socket and a second flange is formed at a base end part. The socket and the pipe are adhered to each other and a piping is inserted into the socket and the pipe. First back-up materials are disposed in a first gap between the first flange and the hollow panel and a second gap between the second flange and the hollow panel. First sealing materials respectively fill the radial outer side of the first back-up materials. Second back-up materials are disposed in a third gap between the piping at one side in the plate thickness direction and the socket and a fourth gap between the piping at the other side in the plate thickness direction and the pipe. Second sealing materials respectively fill the outer side in the plate thickness direction of the second back-up materials.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a water stop structure and a water stop method for a through hole penetrating the outer wall of a building in the plate thickness direction, and particularly to a structure in which the outer wall is composed of a hollow panel and a pipe is inserted into the through hole.

Background Art

[0002] Patent Document 1 below discloses a water stop structure that constitutes the outer wall of a building with an extruded cement board and suppresses the intrusion of water through the joint of the extruded cement board.

[0003] By the way, there are cases where a through hole is opened in a hollow panel such as an extruded cement board to penetrate in the plate thickness direction, and a metal pipe such as a water supply pipe is inserted into the through hole. In this case, it is necessary to stop the water so that rainwater from the outdoor side or rainwater from the hollow part of the hollow panel does not enter the indoor side through the through hole.

[0004] In the conventional water stop structure, a sealing material is formed in the gap between the through hole and the hollow panel on the outdoor side and the indoor side of the hollow panel.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, since the conventional water stop structure is a two-sided seal (triangle seal), the sealing material deteriorates in a relatively short period (for example, several years), and as a result, there is a problem that the water stop ability decreases in a relatively short period.

[0007] The present disclosure has been made in view of the above-described problems. An object of the present disclosure is to provide a water stop structure and a water stop method for a through hole capable of suppressing deterioration of a sealing material and maintaining a water stop ability.

Means for Solving the Problems

[0008] To solve the above problems, a first aspect of the present disclosure relates to a water stop structure for a through hole penetrating an outer wall of a building in the plate thickness direction. The outer wall is composed of a hollow panel, and a pipe is inserted through the through hole. The water stop structure includes a resin socket inserted into the through hole from one side in the plate thickness direction and having a first flange at the base end on one side in the plate thickness direction, and a resin pipe inserted into the through hole from the other side in the plate thickness direction, at least the tip of which is inserted into the socket and having a second flange at the base end on the other side in the plate thickness direction. The socket and the pipe inserted into the socket are adhered to each other, and a pipe is inserted into the interior of the adhered socket and pipe. The water stop structure includes a first backup material, a first sealing material, a second backup material, and a second sealing material. The first backup material is disposed in a first gap between the first flange and the hollow panel and a second gap between the second flange and the hollow panel, respectively. The first sealing material is filled on the radially outer side of the first backup material in the first gap and the second gap, respectively. The second backup material is disposed in a third gap between a portion of the pipe on one side in the plate thickness direction and the socket and a fourth gap between a portion of the pipe on the other side in the plate thickness direction and the pipe, respectively. The second sealing material is filled on the outer side in the plate thickness direction of the second backup material in the third gap and the fourth gap, respectively.

[0009] A second aspect further has the following features in addition to the first aspect. The first flange is welded to the base end of the socket, and the second flange is welded to the base end of the pipe.

[0010] To solve the above problems, a third aspect of the present disclosure relates to a method for water stoppage of a through-hole penetrating the outer wall of a building in the plate thickness direction. The outer wall is composed of a hollow panel, and a pipe is inserted into the through-hole. The water stoppage method includes a step of inserting, from one side in the plate thickness direction, a resin socket having a first flange at the base end on one side in the plate thickness direction into the through-hole; a step of inserting, from the other side in the plate thickness direction, a resin pipe having a second flange at the base end on the other side in the plate thickness direction into the through-hole such that at least the tip of the pipe is inserted into the socket; a step of adhering the socket and the pipe inserted into the socket to each other; a step of providing a first backup material in a first gap between the first flange and the hollow panel and a second gap between the second flange and the hollow panel, respectively; a step of filling a first sealing material on the radially outer side of the first backup material in the first gap and the second gap, respectively; a step of providing a second backup material in a third gap between a portion on one side in the plate thickness direction of the pipe and the socket and a fourth gap between a portion on the other side in the plate thickness direction of the pipe and the pipe, respectively; and a step of filling a second sealing material on the plate thickness direction outer side of the second backup material in the third gap and the fourth gap, respectively.

[0011] A fourth aspect further has the following features in addition to the third aspect. The water stoppage method further includes a step of adjusting the length of the pipe so that a predetermined first gap and second gap are formed in a state where the pipe is inserted into the socket.

Advantages of the Invention

[0012] According to the present disclosure, by adhering the overlapping portions of the socket and the pipe to each other, it is possible to prevent rainwater flowing through the hollow portion from entering the inside of the socket and the pipe. Further, by filling the first sealing material through the first backup material in the first gap and the second gap, and filling the second sealing material through the second backup material in the third gap and the fourth gap, it is possible to prevent rainwater from the outdoor side and rainwater flowing through the hollow portion of the hollow panel from entering the indoor side through the through-hole. Moreover, since both the first sealing material and the second sealing material form a three-sided seal (square seal), these first sealing material and second sealing material do not deteriorate in a relatively short period of time, and as a result, the water-stopping ability can be maintained.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. However, when referring to numbers such as the number, quantity, amount, range, etc. of each element in the embodiments shown below, unless otherwise specified or clearly specified to that number in principle, this disclosure is not limited to the mentioned number. Further, the structures and the like described in the embodiments shown below are not necessarily essential to this disclosure, unless otherwise specified or clearly specified to that in principle.

[0015] FIG. 1 is a cross-sectional view schematically showing a water stop structure of a through hole according to an embodiment. FIG. 2(a) is a side view showing the socket 2 shown in FIG. 1, and FIG. 2(b) is a side view showing the pipe 3 shown in FIG. 1.

[0016] As shown in FIG. 1, the hollow panel 1 constitutes an outer wall of a building (not shown), and a through hole (through hole) 10 penetrating in the plate thickness direction is formed in the hollow panel 1. The hollow panel 1 has a hollow portion 11 extending vertically inside. As the hollow panel 1, for example, an extruded cement panel (ECP: Extruded Cement Panel), a resin-made hollow panel, or the like can be used. A metal pipe 4 is inserted into the through hole 10, that is, into the socket 2 and the pipe 3 described later that are inserted into the through hole 10. The pipe 4 is, for example, a water supply pipe communicating with a water heater (not shown) installed outdoors.

[0017] The socket 2 has a cylindrical socket body 21 inserted into the through hole 10 from one side in the plate thickness direction, and a first flange 22 provided at the base end portion on one side in the plate thickness direction of the socket body 21. A rib portion 23 protruding radially inward is formed on the inner surface of the middle portion of the socket body 21.

[0018] The pipe 3 has a cylindrical pipe body 31 inserted into the through hole 10 from the other side in the plate thickness direction, and a second flange 32 provided at the base end portion on the other side in the plate thickness direction of the pipe body 31. The outer diameter of the pipe body 31 is set smaller than the inner diameter of the socket body 21. Thereby, at least the tip portion of the pipe body 31 is inserted into the socket body 21, and the tip portion of the socket body 31 abuts against the rib portion 23. Thereby, the pipe 3 is positioned in the plate thickness direction. The length L in the plate thickness direction of the pipe body 31 is cut and adjusted at the construction site so that a predetermined first gap S1 and a second gap S2 (described later) are formed in a state where the tip portion of the pipe body 31 abuts against the rib portion 23. In addition, the pipe body 31 may be cut in advance so that a gap slightly larger than these gaps S1 and S2 is formed, and adjusted at the construction site. The socket 2 and the pipe 3 are made of resin, for example, made of vinyl chloride. A first flange 22 is pre-welded over the entire circumference at the base end portion of the socket body 21. Similarly, a second flange 32 is pre-welded over the entire circumference at the base end portion of the pipe body 31. The socket body 21 and the pipe body 31 installed in the socket body 21, that is, the overlapping portion of the socket body 21 and the pipe body 31 are adhered to each other by an adhesive (not shown). A pipe 4 is inserted into the adhered socket 2 and pipe 3. As the socket body 21 and the pipe body 31, commercially available products (VU / DV joints, pipes) for connecting two pipe bodies can be used. Since the socket 2 and the pipe 3 can be obtained only by welding the flanges 22 and 32 to this commercially available product, detailed description is omitted here.

[0019] A first backup material 51 is respectively disposed in a first gap S1 between the first flange 22 and the hollow panel 1 and a second gap S2 between the second flange 32 and the hollow panel 1. The first backup material 51 is used for forming the base of the first sealing material 61 described later and adjusting the joint depth in the vertical direction. Since a known one can be used as the first backup material 51, detailed description thereof is omitted here. A first sealing material 61 is respectively filled outside the first backup material 51 in the radial direction of the first gap S1 and the second gap S2. Since the filled first sealing material 61 contacts the first flange 22 or the second flange 32, the hollow panel 1, and the first backup material 51, three-sided sealing (square sealing) is realized. By disposing the first backup material 51, it is possible to prevent the first sealing material 61 from flowing into the hollow portion 11 through the gap between the through hole 10 formed in the hollow panel 1, the socket 2, and the pipe 3, and to reduce the filling amount of the first sealing material 61 to shorten the curing time.

[0020] A second backup material 52 is disposed in a third gap S3 between one side portion of the pipe 4 in the plate thickness direction and the socket 2 and a fourth gap S4 between the other side portion of the pipe 4 in the plate thickness direction and the pipe 3. The second backup material 52 is used for forming the base of the second sealing material 62 described later and adjusting the joint depth in the plate thickness direction. A second sealing material 62 is respectively filled outside the second backup material 52 in the plate thickness direction of the third gap S3 and the fourth gap S4. Since the filled second sealing material 62 contacts the socket 2 or the pipe 3, the pipe 4, and the second backup material 52, three-sided sealing (square sealing) is realized. By disposing the second backup material 52, it is possible to prevent liquid leakage even when the diameter of the pipe 4 is small and the third gap S3 is wide, and to reduce the filling amount of the second sealing material 62 to shorten the curing time.

[0021] Next, a method for stopping water leakage through the through hole will be described. First, as shown in FIG. 2, a socket 2 having a first flange 22 and a pipe 3 having a second flange 32 are prepared.

[0022] At the construction site, the pipe body 31 is cut to a predetermined length L so that a predetermined first gap S1 and a second gap S2 are formed in a state where the pipe body 31 is inserted into the socket body 21. After cutting, an adhesive (not shown) is applied to the overlapping portion of the socket body 21 and the pipe body 31. The socket 2 coated with the adhesive is inserted into the through hole 10 from one side in the plate thickness direction, and the pipe 3 coated with the adhesive is inserted into the through hole 10 from the other side in the plate thickness direction, so that the pipe body 31 is inserted into the socket body 21. When the tip of the pipe body 31 abuts against the rib portion 23, the pipe 3 is positioned with respect to the socket 2. When the adhesive is cured in this state, the socket 2 and the pipe 3 are adhered to each other. Here, if the center lines of the socket body 21 and the pipe body 31 are displaced vertically from the center line of the through hole 10, the socket 2 and the pipe 3 may abut against the edge of the through hole 10, and rainwater flowing through the hollow portion 11 of the hollow panel 1 may reach the second gap S2 through the socket 2 and the pipe 3. Therefore, it is preferable to position the socket 2 and the pipe 3 in the vertical direction so that the center lines of the socket body 21 and the pipe body 31 coincide with the center line of the through hole 10.

[0023] First backup materials 51 are respectively provided in the first gap S1 between the first flange 22 and the hollow panel 1 and the second gap S2 between the second flange 32 and the hollow panel 1. Next, first sealing materials 61 are respectively filled outside the first backup materials 51 in the radial direction in the first gap S1 and the second gap S2. At this time, if the first gap S1 and the second gap S2 are set to be equal, the curing times of the first sealing materials 61 filled in both gaps S1 and S2 can be made equal, which is advantageous.

[0024] After inserting the pipe 4 into the socket 2 and the pipe 3, a second backup material 52 is provided in a third gap S3 between a portion on one side in the plate thickness direction of the pipe 4 and the socket 2, and a fourth gap S4 between a portion on the other side in the plate thickness direction of the pipe 4 and the pipe 3, respectively. Next, a second sealing material 62 is filled on the outer side in the plate thickness direction of the second backup material 52 in the third gap S3 and the fourth gap S4, respectively. At this time, if the position of the second backup material 52 is set so that the filling amounts of the second sealing material 62 filled in both gaps S3 and S4 are equal, the curing times of the second sealing material 62 filled in both gaps S1 and S2 can be made equal, which is advantageous.

[0025] Note that the first flange 22 exposed outdoors may be covered with lacquering, the illustration of which is omitted. If it is not covered with lacquering, a weather-resistant paint may be applied to the first flange 22 of the socket 2, or a weather-resistant film may be attached thereto. In this case, it is not necessary to apply a weather-resistant paint or attach a weather-resistant film to the second flange 32 of the pipe 3 located indoors.

[0026] As described above, according to the present embodiment, by adhering the overlapping portions of the socket 2 and the pipe 3 to each other, it is possible to prevent rainwater flowing through the hollow portion 11 from entering the inside of the socket 2 and the pipe 3. Further, the first sealing material 61 is filled in the first gap S1 and the second gap S2 via the first backup material 51, and the second sealing material 62 is filled in the third gap S3 and the fourth gap S4 via the second backup material 52, so that rainwater from the outdoor side and rainwater flowing through the hollow portion of the hollow panel do not enter the indoor side through the through hole, and water can be stopped. Moreover, since both the first sealing material 61 and the second sealing material 62 constitute a three-sided seal (square seal), these first sealing material 61 and second sealing material 62 do not deteriorate in a relatively short period of time, and as a result, the water-stopping ability can be maintained.

[0027] As described above, the embodiments of the present disclosure have been explained. However, the present disclosure is not limited to the above-described embodiments, and various modifications can be made and implemented without departing from the spirit of the present disclosure. In the above embodiment, the tip of the socket 2 extends to directly below the hollow portion 11, but as in the modification shown in FIG. 3, it may extend to a position beyond the hollow portion 11. According to this, since the tip of the socket body 21 is not located directly below the hollow portion 11, the amount of rainwater flowing from the hollow portion 11 into the adhesive portion between the socket 2 and the pipe 3 can be reduced, which is advantageous.

[0028] In the above embodiment, the second backup material 52 is provided after inserting the pipe 4, but the second backup material 52 can also be wound around predetermined positions of the pipe 4 before inserting the pipe 4. In this case, as the second backup material 52, a commercially available product in which an adhesive layer and a release paper are laminated on one surface is used, and it is preferable to provide the second backup material 52 with the adhesive layer exposed by peeling the release paper facing the pipe 4 side.

Explanation of Reference Numerals

[0029] 1... Hollow panel, outer wall, 10... Through hole, 11... Hollow portion, 2... Socket, 21... Socket body, 22... First flange, 23... Rib portion, 3... Pipe, 31... Pipe body, 32... Second flange, 4... Pipe, 51... First backup material, 52... Second backup material, 61... First sealing material, 62... Second sealing material, S1... First gap, S2... Second gap, S3... Third gap, S4... Fourth gap

Claims

1. A water stop structure for a through-hole penetrating the outer wall of a building in the plate thickness direction, wherein the outer wall is composed of a hollow panel and a pipe is inserted into the through-hole, a resin socket inserted into the through-hole from one side in the plate thickness direction and having a first flange at the base end on one side in the plate thickness direction; a resin pipe inserted into the through-hole from the other side in the plate thickness direction, at least the tip of which is inserted into the socket, and having a second flange at the base end on the other side in the plate thickness direction, and the socket and the pipe inserted into the socket are adhered to each other, and the pipe is inserted into the interiors of the adhered socket and pipe, the water stop structure comprising: a first backup material respectively disposed in a first gap between the first flange and the hollow panel and a second gap between the second flange and the hollow panel; a first sealing material respectively filled on the radially outer sides of the first backup material in the first gap and the second gap; a second backup material respectively disposed in a third gap between a portion of the pipe on one side in the plate thickness direction and the socket and a fourth gap between a portion of the pipe on the other side in the plate thickness direction and the pipe; a second sealing material respectively filled on the radially outer sides of the second backup material in the third gap and the fourth gap; A water stop structure for a through-hole comprising the above.

2. The water stop structure for a through-hole according to claim 1, wherein the first flange is welded to the base end of the socket, and the second flange is welded to the base end of the pipe.

3. A method for stopping water in a through-hole penetrating the outer wall of a building in the plate thickness direction, wherein the outer wall is composed of a hollow panel and a pipe is inserted into the through-hole, a step of inserting a resin socket having a first flange at the base end on one side in the plate thickness direction into the through-hole from one side in the plate thickness direction; a step of inserting a resin pipe having a second flange at the base end on the other side in the plate thickness direction into the through-hole from the other side in the plate thickness direction such that at least the tip of the pipe is inserted into the socket; a step of adhering the socket and the pipe inserted into the socket to each other; a step of respectively providing a first backup material in a first gap between the first flange and the hollow panel and a second gap between the second flange and the hollow panel; A step of filling a first sealing material on the radially outer side of the first backup material in the first gap and the second gap, respectively; A step of providing a second backup material in a third gap between a portion on one side in the plate thickness direction of the pipe and the socket, and a fourth gap between a portion on the other side in the plate thickness direction of the pipe and the pipe, respectively; A step of filling a second sealing material on the outer side in the plate thickness direction of the second backup material in the third gap and the fourth gap, respectively; A method for water stoppage of a through hole including the above steps.

4. The method for water stoppage of a through hole according to claim 3, further including a step of adjusting the length of the pipe so that a predetermined first gap and a second gap are formed between the second flange and the hollow panel with the pipe inserted into the socket.

Images