JP2009102929A - Foundation penetrating piping structure, sheath pipe used for the same, and drain pipe removing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foundation penetrating piping structure facilitating inspection and repair because piping construction can be performed without cutting reinforcement arrangement provided in a concrete foundation of a building. <P>SOLUTION: A sheath pipe 1 integrally formed with a vertical sheath pipe part 1a and a horizontal sheath pipe part 1b allowing the insertion of a 90° elbow joint 2 is embedded in an underfloor part B of the building. The 90° elbow joint 2 formed to be breakable is held in a lower part of the vertical sheath pipe part 1a of the sheath pipe 1. An upstream vertical drain pipe 3 is connected to an upstream connection port 2b of the 90° elbow joint 2, and a downstream horizontal drain pipe 4 is connected to a downstream connection port 2c. Since the sheath pipe 1 has the vertical sheath pipe part 1a vertically erected from the horizontal sheath pipe part 1b, it can be piped if the spacing of reinforcement arrangement is larger than the outer diameter of the sheath pipe 1. The inspection and repair of a piping part which penetrates the foundation B can be carried out by breaking the 90° elbow joint 2 held in the lower part of the vertical sheath pipe part 1a and then pulling out the upstream vertical drain pipe 3 and the downstream horizontal drain pipe 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pipe structure that penetrates the foundation of a building, and it is easy to inspect and repair the pipeline without damaging the foundation. It relates to a removal method.

  Conventionally, as a piping structure that penetrates the foundation of a building, a structure as shown in FIG. 11 is known. This piping structure is provided with reinforcing bars 6 for reinforcing the concrete foundation B, and before the concrete foundation B of the building is placed, the vertical structure on the upstream side connected to water facilities such as a wash basin, a bathroom and a kitchen in advance. After connecting the drainage pipe 3 and the downstream side drainage pipe 4 via the 90 ° joint 8 and placing the concrete foundation B of the building, the downstream side drainage pipe 4 is connected via the 90 ° joints 8 and 8. It is connected to an outdoor drain pipe 11.

  However, in the above piping structure, after the upstream vertical drain pipe 3, the 90 ° elbow joint 8, and the downstream horizontal drain pipe 4 are piped, concrete is poured directly from above to embed, so once the concrete is After the placement, in order to inspect and repair the drain pipe or change the piping, it is necessary to break the concrete foundation B, so the construction becomes large and the strength of the building may be reduced.

  From such a situation, as shown in FIG. 12, there is a drain pipe structure in which a pipe body 100 having an opening inside and outside a building is embedded in a concrete foundation B, and a flexible pipe 101 is inserted into the pipe body 100. Proposed (Patent Document 1). Similarly to the drain pipe structure, the downstream end of the pipe penetrates below the ground surface at the outside of the building, and the upstream end of the pipe penetrates into the interior of the building. A small-diameter pipe having a diameter smaller than that of the pipe body is removably inserted into the pipe body, the downstream end of the small-diameter pipe is connected to the drainage channel, and the drainage facility of the building is connected to the upstream end of the small-diameter pipe. A method for forming a connected drainage channel has also been proposed (Patent Document 2).

Since the drain pipe piping structure is such that the flexible pipe 101 is inserted into the pipe body 100 embedded in the concrete foundation B, the concrete foundation B is broken even if the concrete is once placed like the conventional piping structure. Since the flexible pipe 101 can be inserted and removed without inspecting, the drain pipe can be inspected and repaired.
JP 2002-054203 A JP 2002-115294 A

  However, since the drain pipe piping structure uses the flexible pipe 101 to connect the upstream drain pipe 9 and the downstream lateral drain pipe 4 connected to water facilities such as a wash basin, a bathroom, and a kitchen, It is necessary to raise the tube 100 obliquely upward toward the inside of the building. Although it is possible to raise the flexible pipe 101 in the vertical direction, it is necessary to make the radius of curvature of the flexible pipe 101 very large in order to make such a rise, and if a large radius of curvature is ensured, the flexible pipe 101 Since the lower end of 101 becomes a very deep position, extra excavation work increases and the workability becomes very poor. Under such circumstances, the tubular body 100 is usually raised obliquely upward toward the inside of the building. However, when the tubular body 100 is obliquely raised upward, as shown in FIG. Since the width L of the rising portion becomes larger than D, as shown in FIG. 12, even when the interval between the reinforcing bar 6 and the reinforcing bar 6 is considerably larger than the outer diameter D of the tubular body 100, it interferes with the reinforcing bar 6. May end up. In that case, piping work cannot be performed unless the interposing bar arrangement 6 is cut, and the strength of the building may be reduced. The drain pipe structure that reduces the strength of the building in this way is not preferable in view of the “Housing Quality Assurance Promotion Law” enforced in June 2000. Furthermore, since the pipe body 100 is inclined toward the inside of the house, as shown in FIG. 14, when there is a water facility such as a wash basin near the concrete foundation B, the upstream drain pipe 9 and the flexible pipe Since 101 cannot be directly connected, it has been necessary to connect the drain pipe around the inside of the house once through the 90 ° joints 8 and 8. For this reason, the drainage pipes have been handled extensively and the number of connection work has increased, so the workability has been poor.

  The present invention has been made in view of the above problems, and the problem to be solved is that piping construction is possible without cutting a reinforcing bar provided to reinforce a concrete foundation of a building. An object of the present invention is to provide a basic through-pipe structure that can be easily inspected and repaired without breakage and can be changed, and a method for removing a sheath pipe and a drain pipe used therefor.

  In order to achieve the above object, the basic through-pipe structure according to the present invention embeds a sheath pipe formed integrally with a length, a pipe section and a horizontal section and a pipe section into which a 90 ° elbow joint can be inserted, under the floor of the building, A 90 ° elbow joint that can be broken, cut, or separated is housed in the length of the sheath tube or in the lower part of the pipe part, and the upstream vertical drain pipe is connected to the upstream connection port of the 90 ° elbow joint. The downstream drainage pipe is connected to the downstream connection port of the 90 ° elbow joint.

  In the basic through-pipe structure of the present invention, a notch for breaking is provided on at least the upper surface of the curved portion of the 90 ° elbow joint, or a cutting tool is used to cut at least the lower surface of the curved portion of the 90 ° elbow joint. A basic through-pipe structure in which a concave groove for guiding is provided is preferable. The 90 ° elbow joint is also preferably a basic through-pipe structure in which the upstream joint half and the downstream joint half are separable at the curved portion and are joined in a watertight manner. The elbow joint is provided with a flange at a joint portion between the upstream joint half and the downstream joint half, and a ring-opening ring having a concave groove for accommodating the flange formed on the inner peripheral surface is attached to the flange. A basic through-pipe structure in which both ends of the ring-opening ring are held by detachable pinching members that sandwich the protrusions provided at both ends of the ring-opening ring is preferable. In addition, the 90 ° elbow joint joins the upstream joint half and the downstream joint half so that they can be opened and closed by the hinge part on the lower surface side, and either the upstream side or the downstream side on the upper surface side. A basic through-pipe structure in which the engaging portion formed on one joint half is releasably engaged with the engaged portion formed on the other half is also preferable. In particular, in the basic through-pipe structure described above, it is preferable that the 90 ° elbow joint is a part of the curved portion formed of a flexible body.

  On the other hand, the sheath pipe of the present invention used in the basic through-pipe structure described above is a sheath pipe used in the basic through-pipe structure, and the sheath pipe has a length or pipe having a size capable of inserting the 90 ° elbow joint. And the horizontal section and the pipe section are formed integrally, and the cross-sectional shape of the vertical section and the space of the pipe section is a front rear circular shape.

  The drainage pipe removal method of the present invention is the above-described basic through-pipe structure, in which the 90 ° elbow joint is broken, cut or separated, and the upstream vertical drainage pipe and the downstream lateral drainage are separated. The tube is pulled out from the sheath tube.

  In the method for removing a drain pipe of the present invention, in a basic through-pipe structure in which a notch for breaking is provided on at least the upper surface of the curved part of the 90 ° elbow joint, a breaking tool is inserted from the vertical or upper end opening of the pipe part. Then, it is preferable to break the 90 ° elbow joint by applying its tip to a notch, and pull out the upstream vertical drain pipe and the downstream horizontal drain pipe from the sheath pipe. Further, in a basic through-pipe structure in which a guide groove for cutting with a cutting tool is provided on at least the lower surface of the curved part of the 90 ° elbow joint, the cutting tool is inserted from the vertical or upper end opening of the pipe part. In addition, a method of removing the drain pipe by cutting the 90 ° elbow joint from the guide groove and pulling the upstream vertical drain pipe and the downstream horizontal drain pipe from the sheath pipe is also preferable, the 90 ° elbow joint is In the basic through-pipe structure where the joint half on the upstream side and the joint half on the downstream side are separable at the curved portion and are joined in a watertight manner, a separation jig is inserted from the vertical or upper end opening of the pipe part. A method of removing the drain pipe is also preferred in which the 90 ° elbow joint is separated into an upstream joint half and a downstream joint half, and the upstream vertical drain pipe and the downstream horizontal drain pipe are pulled out from the sheath pipe.

  In the basic through-pipe structure of the present invention, the sheath pipe is composed of a horizontal side or pipe part and a vertical pipe part standing vertically from the side or the pipe part. If it is larger than the outer diameter, piping can be performed without cutting the reinforcing bar. Therefore, unlike the conventional drainage pipe piping structure, there is no fear of reducing the strength of the concrete foundation of the building. In addition, since the radius of curvature can be reduced to a normal 90 ° joint or a large bend pipe, there is no need to dig deep into the ground, and the vertical drainage pipe on the upstream side is erected vertically. Even if there is a water facility such as a wash basin near the concrete foundation as in the case of the drain pipe piping structure, there is no difficulty in handling the drain pipe, connecting the drain pipe once inside the house. In addition, inspection / repair of the pipe part that penetrates the concrete foundation, or change of the pipe, after breaking or cutting or separating the 90 ° elbow joint accommodated in the vertical or lower part of the pipe part, upstream from the sheath pipe This can be done by pulling out the vertical drainage pipe and the horizontal drainage pipe on the downstream side, so there is no need to break the concrete foundation and there is no fear of reducing the strength of the building as in the conventional piping structure. The present invention is characterized in that a 90 ° elbow joint can be broken, cut, or separated at a specific site. With such a 90 ° elbow joint, an upstream vertical drain pipe and a downstream horizontal drain pipe are provided. Can be easily pulled out of the sheath tube. However, if it is a 90 ° elbow joint that breaks, cuts, or separates at an unspecified site, the 90 ° elbow joint that is destroyed when the upstream vertical drain pipe and the downstream horizontal drain pipe are pulled out from the sheath pipe. May get caught and may not pull out of the sheath.

  In the basic through-pipe structure in which a notch for breaking is provided on at least the upper surface of the curved part of the 90 ° elbow joint, the tip of the breaking tool such as a bar is locked to the notch for breaking. Even if it is struck, the 90 ° elbow joint can be easily broken because the breaking tool is greatly reduced from being displaced or detached. This notch may be provided on the entire circumference of the curved portion. In the case of such a 90 ° elbow joint, the 90 ° elbow joint is surely broken and separated at the notch portion, so that the vertical drainage pipe on the upstream side The downstream side drainage pipe can be easily pulled out from the sheath pipe.

  In addition, the basic through-pipe structure in which a groove for guide for cutting with a cutting tool is provided on at least the lower surface of the curved portion of the 90 ° elbow joint, for example, a wire saw is inserted into the groove for guide By pulling the saw up and down from above, the 90 ° elbow joint can be cut easily and reliably at the groove, and the vertical drainage pipe on the upstream side and the horizontal drainage pipe on the downstream side are separated from the sheath pipe. Can be pulled out.

  Furthermore, the basic through-pipe structure in which the 90 ° elbow joint is water-tightly joined so that the upstream joint half and the downstream joint half can be separated at the curved portion is a breaker or a cutting tool. The upstream joint half and the downstream joint half can be separated without using tools.

  In particular, the 90 ° elbow joint includes a ring-opening ring in which a flange is provided at a joint portion between an upstream joint half and a downstream joint half, and a concave groove that accommodates the flange is formed on the inner peripheral surface. The basic through-pipe structure is a detachable clamping member that is attached to the flange and sandwiches the protrusions provided at both ends of the ring opening ring and that holds both ends of the ring opening ring. Since the upstream half of the joint and the downstream half of the joint can be separated simply by removing them from the protrusions provided on the part, the separation work becomes easier.

  In addition, the 90 ° elbow joint joins the upstream joint half and the downstream joint half so that they can be opened and closed by the hinge part on the lower surface side, and either the upstream side or the downstream side on the upper surface side. The basic through-pipe structure in which the engaging portion formed on one joint half is releasably engaged with the engaged portion formed on the other is also the relationship between the engaging portion and the engaged portion. By simply releasing the combined state, the upstream joint half and the downstream joint half can be separated.

  Furthermore, the basic through-pipe structure in which the 90 ° elbow joint of any of the above-described basic through-pipe structures is formed by forming a part of the curved portion with a flexible body is highly likely to be damaged during an earthquake or the like. ° Part of the elbow joint's curved part is made of an elastic flexible body to reduce earthquake vibrations and shocks when connecting pipes, and drainage piped to 90 ° elbow joints and foundation through-pipe structures. The breakage of the tube, in particular the breakage of the 90 ° elbow joint, or the breakage of the part to be cut or separated can be greatly reduced.

  On the other hand, it is a sheath pipe used in any of the above-mentioned basic through-piping structures, and the sheath pipe is integrally formed with a length and a pipe section and a lateral section and a pipe section of such a size that the 90 ° elbow joint can be inserted. The sheath and pipe having a vertical cross-sectional shape in the vertical direction and the space of the pipe part are 90 degrees by changing the vertical cross-sectional shape of the vertical direction and the space in the pipe part to a front rear circular shape. The elbow joint can be easily accommodated in the vertical length and the pipe portion, and can be easily taken out from the vertical length and the pipe portion after the 90 ° elbow joint is broken, cut, or separated.

  On the other hand, in any of the basic through-piping structures described above, the 90 ° elbow joint is broken, cut, or separated, and the drainage pipe is removed by pulling the upstream vertical drainage pipe and the downstream horizontal drainage pipe from the sheath pipe. As for the method, the 90 ° elbow joint is broken, cut, or separated into two parts on the upstream side and downstream side by the above method, and the vertical drain pipe on the upstream side from the sheath pipe and the horizontal drain pipe on the downstream side. By pulling out the pipe, it is possible to inspect and repair the pipeline or change the piping.

  In particular, in a basic through-pipe structure in which a notch for breaking is provided on at least the upper surface of the curved part of the 90 ° elbow joint, a breaking tool is inserted from the vertical or upper end opening of the pipe part, and the tip is applied to the notch. To break the 90 ° elbow joint, pull the upstream vertical drain pipe and the downstream horizontal drain pipe from the sheath pipe, and remove the drain pipe by inserting a destructive tool such as a bar from the vertical or top opening of the pipe section. When the tip is applied to the notch and a load is applied from above with a hammer or the like, force is concentrated on the notch portion, so that the 90 ° elbow joint can be broken into two parts with the notch portion as a boundary. Therefore, by pulling out the broken 90 ° elbow joint and the upstream vertical drain pipe and downstream side drain pipe connected to the 90 ° elbow joint from the sheath pipe, The piping can be changed more easily.

  In addition, in a basic through-pipe structure in which a guide groove for cutting with a cutting tool is provided on at least the lower surface of the curved part of the 90 ° elbow joint, the cutting tool is inserted from the vertical or upper end opening of the pipe part. Cut the 90 ° elbow joint from the guide groove, pull the upstream vertical drain pipe and the downstream horizontal drain pipe from the sheath pipe, and also remove the drain pipe inserted into the guide groove 90 ° elbow joint can be easily cut with a tool (such as a wire saw), 90 ° elbow joint from the sheath tube, upstream vertical drain pipe connected to the 90 ° elbow joint, and downstream horizontal drain pipe It is possible to easily inspect and repair the inside of the pipe line or change the pipe.

  Furthermore, in the basic through-pipe structure in which the 90 ° elbow joint is a water-tight joint in which the joint half on the upstream side and the joint half on the downstream side are separable at the curved portion, A 90 ° elbow joint is separated into an upstream joint half and a downstream joint half, and the upstream vertical drain pipe and the downstream horizontal drain pipe are sheathed. The method of removing the drain pipe that is pulled out from the pipe is also separated with the separating jig into the upstream joint half and the downstream joint half, and after pulling out from the sheath pipe, the inside of the pipe can be easily inspected and repaired. Or piping can be changed.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  1 is a cross-sectional view of a main part showing a basic through-piping structure according to an embodiment of the present invention, FIG. 2 is a perspective view showing a sheath tube used in the same piping structure, FIG. 3 is a plan view of the sheath tube, and FIG. FIG. 5 is a perspective view showing a 90 ° elbow joint used in the piping structure, and FIG. 6 is a sectional view of the joint.

  As shown in FIG. 1, the foundation through-pipe structure of the present invention is a pipe structure that penetrates a concrete foundation B of a building, and includes a sheath pipe 1, a 90 ° elbow joint 2, and an upstream vertical drain pipe 3. , And the downstream side drainage pipe 4.

As shown in FIGS. 2 and 4, the sheath tube 1 is integrally formed with a horizontal side or tube portion 1 b and a vertical or tube portion 1 a erected vertically from the side or tube portion 1 b (however, The sheath tube 1 is a product obtained by forming the sheath tube 1 in a divided state from the standpoint of productivity, moldability, etc., and does not exclude those formed integrally). As shown in FIG. The cross-sectional shape of the space of the tube portion 1a is formed to be a front rear circular shape. The length and the length L1 of the pipe portion 1a are preferably formed to be shorter than the length L2 of the 90 ° elbow joint 2 described later. If the 90 ° elbow joint 2 is not inclined, the length and the pipe portion It is formed in such a size that it cannot be inserted into 1a. As described above, the vertical cross section of the space of the pipe portion 1a is not circular but the front rear circular shape, so that the 90 ° elbow joint 2 can be easily accommodated in the vertical or pipe portion 1a, and the 90 ° elbow joint. After 2 is destroyed, it can be easily pulled out from the length or the tube portion 1a. In addition, by forming the length and the length L1 of the pipe portion 1a as short as possible, it becomes possible to install even in a place where the interval between the reinforcing bar 6 and the reinforcing bar 6 is narrow, and the opening area can be reduced. Strength reduction can be prevented.
In addition, as for the cross-sectional shape of the length and the space of the pipe portion 1a, it is desirable that the rectangular portion is directed to the outside (downstream side) of the building for the convenience of piping.

The side and pipe portion 1b is a cylinder having an inner diameter sufficient to allow the downstream side drainage pipe 5 to be inserted therein, and a connection for connecting the length adjusting void pipe 5 shown in FIG. A port 1c is formed, and a convex portion 1d for attaching a 90 ° elbow joint 2 described later is formed on the upstream side of the connection port 1c, as shown in FIG. As described above, when the length adjusting void tube 5 can be connected to the side or the tube portion 1b, the left and right lengths can be arbitrarily set by cutting the void tube 5. It is not necessary to form the pipe 1 in accordance with the size of the concrete foundation B at the construction site (however, without using the void pipe, the size of the sheath pipe should be matched to the size of the concrete foundation at the construction site. Not excluded).
In addition, when the height of the concrete foundation B is higher than the height and the pipe 1, the height adjustment may be performed by connecting a height adjustment void pipe (not shown) to the pipe portion 1a.

  The sheath 1 having the above-described configuration is not particularly limited in terms of dimensions, materials, etc., but the length and length L1 of the tube portion 1a are 100 mm to 250 mm, the height is 200 mm to 300 mm, and the width and the inner diameter of the tube portion 1b are the same. The thing of 60 mm-120 mm is used suitably. In view of strength, durability, and moldability, it is desirable to use a synthetic resin, and a hard vinyl chloride resin is particularly preferably used.

  As shown in FIGS. 5 and 6, the 90 ° elbow joint 2 accommodated in the length of the sheath tube 1 and the lower portion of the tube portion 1a includes a curved portion 2a and an upstream side formed at the upper end of the curved portion 2a. The upper connecting port 2b for connecting the vertical drainage pipe 3 and the lower connecting port 2c for connecting the downstream side drainage pipe 4 formed at the lower end of the curved portion 2a have a substantially L-shaped cross section. The bending portion 2a is a flexible body by a joint. In this way, by forming the curved portion 2a of the 90 ° elbow joint, which is highly likely to be damaged by an earthquake, with an elastic flexible body, the vibration of the earthquake and the impact at the time of pipe connection are reduced, and the 90 ° elbow joint is reduced. 2 is greatly reduced, and damage to the vertical drainage pipe 3 on the upstream side connected to the 90 ° elbow joint 2 and the horizontal drainage pipe 4 on the downstream side can be prevented.

In the vicinity of the lower connection port 2c of the curved portion 2a, as shown in FIG. 5 and FIG. 6, a protrusion 2f of a protrusion is provided over the entire circumferential direction, and the protrusion 2f of the protrusion and the lower connection opening The 90 ° elbow joint 2 is accommodated in the sheath tube 1 by fitting the projection 1d provided on the bottom surface of the sheath 1 and the lower surface of the tube portion 1b into the fitting groove 2d formed between the sheath tube 2c and the fitting tube 2c. . When the 90 ° elbow joint 2 is housed in the sheath pipe 1 in this way, it can be attached without wobbling, so that it becomes easy to connect the upstream vertical drain pipe 3 and the downstream horizontal drain pipe 4 to the 90 ° elbow joint 2.
The convex portion 1d does not need to be formed integrally with the sheath tube 1 and may be provided on the lateral surface or the lower surface of the tube portion 1b as a separate member. In the drawing, the fitting groove 2d is provided in a circumferential shape, but it is also preferable to provide it in a hole shape. Thus, if it provides in hole shape, rotation of the 90 degree elbow joint 2 can also be prevented. Further, as described above, the hole-like wobble / rotation prevention is not only formed between the protrusion 2f of the ridge and the lower connection port 2c, but may be provided on the lower surface of the curved portion 2a (not shown). ).

Further, as shown in FIG. 6, a notch 2e for breaking the 90 ° elbow joint 2 with a breaking tool (not shown) is provided on the upper surface of the curved portion 2a. The notch 2e is formed by forming a thin portion having a substantially inverted triangle shape on the upper surface of the curved portion 2a, and the 90 ° elbow joint 2 is broken into two parts with the notch 2e as a boundary. The thickness of the thin portion of the notch 2e is preferably formed to be thicker than the average thickness of the 90 ° elbow joint 2, particularly the thickness of the curved portion 2a. By doing so, the notch 2e is not easily broken by an impact applied to the 90 ° elbow joint 2 at the time of earthquake or pipe connection, and can be broken only when trying to break using a breaking tool.
Although various types of destruction tools can be considered, the use of a rod or bar with a sharp tip makes it easier to break the 90 ° elbow joint 2. In addition, the notch 2e may be provided over the entire circumferential direction of the curved portion 2a, but the strength of the 90 ° elbow joint 2 is reduced by providing it only on the upper surface of the curved portion 2a as in this embodiment. This is preferable because there is not.

  The 90 ° elbow joint 2 configured as described above is not particularly limited in material, but is preferably formed of a synthetic resin in view of strength, durability, and moldability. Those made of are preferably used. When the bending portion 2a is formed of a flexible body, a soft synthetic resin such as various elastomers, a soft vinyl chloride resin, or rubber may be used as the material. In addition, the entire bending portion 2a does not need to be formed of a flexible body, and at least a part of the bending portion 2a may be formed on the entire circumference of the bending portion 2a. Furthermore, it goes without saying that the flexible body of the bending portion 2a may be integrally formed, or may be integrated as a part of the 90 ° elbow joint 2 after another member is formed of the flexible body.

  The upstream vertical drain pipe 3 connected to the upper connection port 2b of the 90 ° elbow joint 2 and the downstream horizontal drain pipe 4 connected to the lower connection port 2c of the 90 ° elbow joint 2 are made of vinyl chloride resin. A PVC pipe having a nominal diameter of 50 mm to 100 mm is preferably used. Therefore, the 90 ° elbow joint 2 having a diameter of 50 mm to 100 mm is often used in accordance with the upstream vertical drain pipe 3 and the downstream horizontal drain pipe 4.

  Next, a construction example of a basic through-piping structure composed of the above members will be described.

  First, the external form of the concrete foundation B of a building is formed with a concrete formwork (not shown), and the reinforcement 6 for reinforcing the concrete foundation B is provided therein. And as shown in FIG. 1, the sheath pipe | tube 1 mentioned above is installed between the bar arrangement 6 and the bar arrangement 6, and the length adjustment is carried out to the side of the sheath pipe 1 or the connection port 1c of the pipe part 1b front-end | tip. The void tube 5 is inserted and connected. At this time, the connection portion between the connection port 1c and the void tube 5 is water-stopped by, for example, winding a tape from the outside, and the other end of the void tube 5 is also water-stopped using a tape or the like. By doing so, it is possible to prevent the concrete sheath from entering the pipe when the concrete is placed later. If necessary, a height adjusting void tube is connected to the length of the sheath tube 1 or the tube portion 1a. It is preferable that the height of the void pipe is adjusted so that the cast concrete does not easily enter the sheath pipe 1 so that it protrudes slightly from the solid foundation portion of the concrete foundation B. The process at that time is the same as when the connection port 1c and the void tube 5 are connected.

  Next, concrete is placed in the concrete formwork to form the concrete foundation B of the building.

  When the sheath tube 1 is embedded in the concrete foundation B by the above procedure, the 90 ° elbow joint 2 described above is then housed in the sheath tube 1 from the length of the sheath tube 1 or the tube portion 1a. At this time, since the length and the length L1 of the pipe portion 1a are shorter than the length L2 of the 90 ° elbow joint 2, it is necessary to insert it obliquely. In this manner, the 90 ° elbow joint 2 is inserted in a state where it is inclined obliquely to the vertical portion or the tube portion 1a, and the fitting groove 1d of the 90 ° elbow joint 2 is fitted into the convex portion 1d provided on the sheath tube 1. After fixing so as not to move, the vertical drainage pipe 3 on the upstream side is connected to the upper connection port 2b of the 90 ° elbow joint 2, and the horizontal drainage pipe 4 on the downstream side is connected to the lower connection port 2c. Then, the upstream vertical drain pipe 3 is connected to a 90 ° joint 8, and the 90 ° joint 8 is connected to an upstream drain pipe 9 connected to water facilities (not shown) such as a wash basin, a bathroom, and a kitchen. . Further, the lower end of the downstream side drainage pipe 4 is connected to the outdoor drainage pipe 11. In this construction example, two 90 ° joints 8 and a short tube 12 connecting the 90 ° joints 8 are interposed between the outdoor drain pipe 11 and the downstream side drain pipe 4. Finally, the construction of the basic through piping structure is completed by connecting the outdoor drain pipe 11 and the drainage basin 10.

  In the basic through-pipe structure as described above, if the interval between the bar arrangement 6 and the bar arrangement 6 is larger than the length of the sheath 1 or the length L1 and the width of the tube portion 1a and the outer diameter of the tube portion 1b, the reinforcement 6 Therefore, there is no fear of reducing the strength of the concrete foundation B of the building as in the conventional drainage pipe structure. Further, since the radius of curvature of the sheath tube 1 can be suppressed to a level of a normal 90 ° joint or a large bent tube, it is not necessary to excavate the ground deeply. Since the vertical drainage pipe 3 on the upstream side is erected vertically with respect to the ground, even if there are water facilities such as a wash basin near the concrete foundation B as in the conventional drainage pipe piping structure, it is once residential Since it is not necessary to connect the drainage pipe around the inside, it is easy to work.

  Next, a method for removing the upstream vertical drain pipe 3 and the downstream horizontal drain pipe 4 for inspecting / repairing the inside of the pipe line of the basic through-piping structure or changing the pipe will be described.

  First, the upstream vertical drain pipe 3 is cut from the connecting portion with the 90 ° joint 8 and the downstream horizontal drain pipe 4 protruding from the concrete foundation B is cut (however, the above cutting operation is not performed). May be good). Next, the 90 ° elbow joint 2 is broken with a breaking tool such as a bar and separated into an upstream side and a downstream side. To break the 90 ° elbow joint 2, insert a breaking tool such as a bar from the top or the top opening of the pipe portion 1 a, and hit the bar with a hammer from above while applying the tip of the bar to the notch 2 e. Can do. When the 90 ° elbow joint 2 is broken and separated into the upstream side and the downstream side, the vertical side and the upstream side of the broken 90 ° elbow joint 2 are pulled out from the upper opening of the pipe portion 1a, and the side port and the connection port of the pipe portion 1b. By pulling the downstream side of the 90 ° elbow joint 2 from 1c, the removal work of the vertical drainage pipe 3 on the upstream side and the horizontal drainage pipe 4 on the downstream side is completed, and inspection and repair in the pipe line of the basic through-pipe structure, Alternatively, the piping can be changed.

  The drainage pipe removal method as described above is performed by separating the 90 ° elbow joint 2 accommodated in the vertical part or the lower part of the pipe part 2a up and down with the notch 2e as a boundary, and the upstream vertical drainage pipe 3 and the downstream side. Since it can be done simply by pulling out the horizontal drainage pipe 4, in order to inspect and repair the piping part that penetrates the concrete foundation B, or to change the piping, the concrete foundation B is used like a conventional piping structure. There is no need to break it and there is no worry of reducing the strength of the building.

  FIG. 7 is a cross-sectional view showing a 90 ° elbow joint used in a basic through pipe structure according to another embodiment of the present invention.

The 90 ° elbow joint 20 used in the basic through-pipe structure of this embodiment is a guide groove for cutting with a cutting tool (not shown) instead of the notch 2e provided in the 90 ° elbow joint 2 described above. 2g is provided. As shown in FIG. 7, the guide groove 2g has a concave cross-sectional shape provided slightly upstream from the above-described protrusion 2f of the ridge, and extends over the entire circumferential direction of the curved portion 2a. Is provided.
The guide concave groove 2g functions as long as it is provided at least on the lower surface side of the curved portion 2a, preferably about half the height of the curved portion 2a. Moreover, it is preferable that the guide groove 2g is a groove having a substantially inverted trapezoidal cross section or a rounded bottom.
The other structure of the 90 ° elbow joint 2 used in this basic through-pipe structure is the same as the basic through-pipe structure of the embodiment shown in FIGS. 1 to 6 described above, and this 90 ° elbow joint 20 is used. The construction procedure of the basic through piping structure is the same as the construction procedure of the basic through piping structure using the 90 ° elbow joint 2 shown in FIG.

The 90 ° elbow joint 20 inserts a cutting tool (such as a wire-shaped saw) from the length of the sheath tube 1 or the upper opening of the tube portion 1a and fits into the guide groove 2g, and the cutting tools are alternately turned up and down. It can be easily cut by pulling on.
The removal method of the upstream vertical drain pipe 3 and the downstream horizontal drain pipe 4 of the basic through-pipe structure using the 90 ° elbow joint 20 is a method of separating the 90 ° elbow joint 20 into the upstream side and the downstream side. However, only the method for removing the drain pipe using the 90 ° elbow joint 2 described above is the same as the method for removing the drain pipe.

  The method for removing the drain pipe of the basic through-pipe structure using the 90 ° elbow joint 20 as described above is also easy to move the 90 ° elbow joint 20 up and down by using the cutting tool, with the groove 2g for the guide as a boundary. Therefore, it is easy to inspect and repair the piping portion penetrating the concrete foundation B or change the piping.

  FIG. 8 is a cross-sectional view showing a 90 ° elbow joint used in a basic through pipe structure according to still another embodiment of the present invention, and FIG. 9 shows a ring opening ring and a clamping member used for connecting the 90 ° elbow joint shown in FIG. FIG.

  As shown in FIG. 8, the 90 ° elbow joint 21 used in the basic through-pipe structure of this embodiment is a two-part joint composed of an upstream joint half 21a and a downstream joint half 21b. Two waterproof packings 21f and 21f are attached to the lower end portion of the joint half 21a on the side, and a flange 21c is provided. Further, an insertion port 21e for inserting the lower end portion of the upstream coupling half 21a is provided at the upper end of the downstream coupling half 21b, and a flange 21d is provided at the tip of the insertion port 21e. Yes. After the upstream joint half 21a and the downstream joint half 21b are inserted into the insertion port 21e of the downstream joint half 21b and temporarily fixed, Are joined by the ring-opening ring 7 and the clamping member 7b.

That is, as shown in FIGS. 8 and 9, the ring-opening ring 7 is a ring in which a concave groove is formed on the inner peripheral surface, a part of the ring is cut, and both ends can be opened. Protrusions 7a and 7a are provided on the portions, respectively. The concave groove of the ring-opening ring 7 is fitted into the flange 21c of the joint half 21a on the upstream side and the flange 21d of the joint half 21b on the downstream side which are temporarily fixed. When the protrusions 7a and 7a are sandwiched and held by the sandwiching member 7b having a substantially concave cross section, the upstream joint half 21a and the downstream joint half 21b can be reliably joined.
The other structure of the 90 ° elbow joint 21 used in this basic through-pipe structure is the same as the basic through-pipe structure of the embodiment shown in FIGS. 1 to 6 described above, and this 90 ° elbow joint 21 is used. As described above, the construction procedure of the basic through-piping structure is the same as that shown in FIG. 1 except that the upstream joint half 21a and the downstream joint half 21b are joined to complete one 90 ° elbow joint 21. Since it is the same as the construction procedure of the basic through-pipe structure using the 90 ° elbow joint 2 shown in FIG.

The 90 ° elbow joint 21 inserts a separation jig (for example, a simple rod) from the length of the sheath tube 1 or the upper opening of the tube portion 1a, and the clamping member 7b is inclined downward at the tip of the separation jig. Alternatively, the clamping member 7b is detached from the protrusions 7a, 7a of the ring-opening ring 7 simply by pushing obliquely upward, so that the upstream joint half 21a and the downstream joint half 21b can be easily separated. However, if the clamping member 7b is mistakenly removed, problems such as water leakage occur, so that a stopper (not shown) for preventing movement of the clamping member 7b or the ring opening ring 7 is provided so that the clamping member 7b can be pushed only in one direction. May be formed.
In the foundation through-pipe structure using the 90 ° elbow joint 21, the removal method of the upstream vertical drain pipe 3 and the downstream horizontal drain pipe 4 is the same as the above-described removal method of the two examples. In contrast to the destruction or cutting of the 90 ° elbow joint 20, in the present embodiment, the separation is performed by separating the upstream joint half 21a and the downstream joint half 21b. Since the other removal method is the same, description is abbreviate | omitted.

  The method for removing the drain pipe of the basic through-pipe structure using the 90 ° elbow joint 21 as described above requires extra labor for joining the upstream joint half 21a and the downstream joint half 21b. On the other hand, by using a separation jig, the 90 ° elbow joint 21 can be separated into the upstream side and the downstream side with a single touch, and the inspection and repair of the piping part that penetrates the concrete foundation B can be easily performed or the piping can be changed. There is an advantage that can be.

  FIG. 10 is a cross-sectional view showing a 90 ° elbow joint used in a basic through pipe structure according to still another embodiment of the present invention.

As shown in FIG. 10, the 90 ° elbow joint 22 used in the basic through-pipe structure of this embodiment is also similar to the 90 ° elbow joint 21 described above, and the upstream joint half 22a and the downstream joint half. An insertion port 22e for inserting the lower end of the upstream coupling half 22a is provided at the upper end of the downstream coupling half 22b, and the distal end of the insertion port 22e. Is provided with a flange 22d. On the other hand, two waterproof packings 22f and 22f are attached to the lower end portion of the upstream joint half 22a as well as the 90 ° elbow joint 21 described above. A hinge portion 22c is provided on the lower surface side of the lower end portion of the upstream joint half 22a, and a return-preventing claw is formed on the upper surface side at the tip engaged with the flange 22d of the downstream joint half 22b. An engaging portion 22g is provided. The upstream joint half 22a and the downstream joint half 22b are joined to each other by a hinge portion 22c provided on the upstream joint half 22a so that the upstream joint half 22a can be opened and closed. The engaging portion 22g provided on the upper surface side is securely attached by engaging with the flange 22d of the joint half 22b on the downstream side. As long as the structure of the hinge part 22c is detachable, a known structure can be adopted. Further, it is preferable that a bag-shaped receiving portion (not shown) is formed on the upper portion of the engaging portion 22g so as to easily receive a separation jig described later.
The upstream joint half 22a may be provided with a flange 22d, and the downstream joint half 22b may be provided with a hinge portion 22c and an engaging portion 22g.
The other structure of the 90 ° elbow joint 22 used for this basic through-pipe structure is the same as the basic through-pipe structure of the embodiment shown in FIGS. 8 and 9 described above, and this 90 ° elbow joint 22 is used. The construction procedure of the basic through-piping structure is as described above except that the 90 ° elbow joint 22 is assembled by engaging the engaging portion 22g and the flange 22d as the engaged portion to assemble the 90 ° elbow joint 22. Since it is the same as the construction procedure of the foundation penetration piping structure using the elbow joint 2, description is abbreviate | omitted.

The 90 ° elbow joint 22 also has a separation jig inserted from the length of the sheath pipe 1 or the upper opening of the pipe portion 1a, and at the tip of the separation jig, above the engagement portion 22g of the upstream joint half 22a. By simply pressing the part, the return prevention claw is removed from the flange 22d, and the engagement state between the upstream joint half 22a and the downstream joint half 22b is released. 22a and the downstream joint half 22b can be separated.
The upstream vertical drain pipe 3 and the downstream horizontal drain pipe 4 in the foundation through-pipe structure using the 90 ° elbow joint 22 are removed by the upstream joint half 22a and the downstream joint half 22b. Since the other removal methods are the same as those of the 90 ° elbow joint 21 described above, except for the separation method, the description is omitted.

  The method for removing the drain pipe of the basic through-pipe structure using the 90 ° elbow joint 22 as described above requires a molding technique to provide the engaging portion 22g in the upstream joint half 22a. As with the elbow joint 21, it is possible to easily inspect and repair the pipe portion penetrating the concrete foundation B or change the pipe by separating the upstream side and the downstream side with a single touch.

It is principal part sectional drawing which shows the basic through piping structure which concerns on one Embodiment of this invention. It is a perspective view which shows the sheath pipe | tube used for the same piping structure. It is a top view of the same sheath. It is sectional drawing of the same sheath. It is a perspective view which shows the 90 degree elbow joint used for the same piping structure. It is sectional drawing of the joint. It is sectional drawing which shows the 90 degree elbow joint used for the basic through-piping structure which concerns on other embodiment of this invention. It is sectional drawing which shows the 90 degree elbow joint used for the basic through-piping structure which concerns on other embodiment of this invention. It is a front view which shows the ring-opening ring and clamping member used for connection of the 90 degree elbow joint shown in FIG. It is sectional drawing which shows the 90 degree elbow joint used for the basic through-piping structure which concerns on other embodiment of this invention. It is a schematic sectional drawing which shows the conventional drain pipe piping structure. It is a schematic principal part sectional drawing which shows the other conventional drainage pipe piping structure. It is sectional drawing which shows the tubular body used in the piping structure of FIG. It is a top view which shows the piping structure of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheath pipe 1a Vertical length and pipe part 1b Horizontal length and pipe part 1c Connection port 1d Convex part 2,20,21,22 90 degree elbow joint 2a Bending part 2b Upper connection port 2c Lower connection port 2d Fitting groove 2e Notch 2f Convex 2g Guide concave groove 21a, 22a Upstream joint half 21b, 22b Downstream joint half 21c Upstream joint half flange 21d Downstream joint half flange 22c Hinge portion 22d Downstream side 22g engaging part 3 upstream vertical drain pipe 4 downstream horizontal drain pipe 5 void pipe 6 reinforcing bar 7 ring opening ring 7a protrusion 7b clamping member B concrete foundation

Claims (12)

  Saddle pipes that are formed by integrating the vertical and horizontal sections and pipe sections into which 90 ° elbow joints can be inserted are buried under the floor of the building, and broken or cut at the bottom of the above-mentioned sheath pipes and pipe sections, or A 90 ° elbow joint that can be separated is accommodated, an upstream vertical drain pipe is connected to the upstream connection port of the 90 ° elbow joint, and a downstream horizontal drain pipe is connected to the downstream connection port of the 90 ° elbow joint. Basic through-piping structure characterized by connecting   The basic through-pipe structure according to claim 1, wherein a notch for breaking is provided on at least the upper surface of the curved portion of the 90 ° elbow joint.   The basic through-pipe structure according to claim 1, wherein a guide groove for cutting with a cutting tool is provided on at least the lower surface of the curved portion of the 90 ° elbow joint.   The foundation according to claim 1, wherein the 90 ° elbow joint is formed by water-tightly joining a joint half on the upstream side and a joint half on the downstream side so as to be separable at a curved portion. Through piping structure.   The 90 ° elbow joint is provided with a ring-opening ring in which a flange is provided at a joint portion between the upstream joint half and the downstream joint half, and a concave groove for accommodating the flange is formed on the inner peripheral surface. 5. The basic through-pipe structure according to claim 4, wherein both ends of the ring-opening ring are held by detachable pinching members which are attached and detachably sandwiching protrusions provided at both ends of the ring-opening ring.   The 90 ° elbow joint joins the upstream joint half and the downstream joint half so that they can be opened and closed at the hinge portion on the lower surface side, and either the upstream side or the downstream side on the upper surface side. The basic through-pipe structure according to claim 4, wherein the engaging portion formed in the joint half is releasably engaged with the engaged portion formed on the other half.   The basic through-piping structure according to any one of claims 1 to 6, wherein the 90 ° elbow joint is formed by forming a part of the curved portion with a flexible body.   A sheath pipe used in the basic through-piping structure according to any one of claims 1 to 7, wherein the sheath pipe has a length and a pipe portion of a size capable of inserting the 90 ° elbow joint, and a transverse sheath. A sheath tube used in a basic through-pipe structure characterized in that a tube portion is integrally formed, and the cross-sectional shape of the length and space of the tube portion is a front rear circular shape.   The basic through-pipe structure according to any one of claims 1 to 7, wherein the 90 ° elbow joint is broken, cut, or separated, and the upstream vertical drain pipe and the downstream horizontal drain pipe are sheathed. A method for removing a drain pipe, wherein the drain pipe is pulled out from the pipe.   3. The basic through-pipe structure according to claim 2, wherein a breaking tool is inserted from the top or the upper end opening of the pipe portion, the tip is applied to the notch to break the 90 ° elbow joint, and the upstream vertical drain pipe and the downstream The method for removing a drain pipe according to claim 9, wherein the side drain pipe on the side is pulled out from the sheath pipe.   4. The basic through-pipe structure according to claim 3, wherein a cutting tool is inserted from the top or the upper end opening of the pipe portion, the 90 ° elbow joint is cut from the groove portion for guide, and the upstream vertical drain pipe and the downstream The method for removing a drain pipe according to claim 9, wherein the side drain pipe on the side is pulled out from the sheath pipe.   5. The basic through-pipe structure according to claim 4, wherein a 90 ° elbow joint is separated into a joint half on the upstream side and a joint half on the downstream side by inserting a separating jig from the vertical or upper end opening of the pipe portion. The method for removing a drain pipe according to claim 9, wherein the vertical drain pipe on the upstream side and the horizontal drain pipe on the downstream side are pulled out from the sheath pipe.

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