JP2012246709A - Sheath pipe for drain tube, sheath pipe component, and piping structure of drain tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheath pipe which allows a drain tube in a concrete structure to be easily and efficiently renewed using general-purpose piping components.SOLUTION: A sheath pipe 1 for a drain tube having a connection opening 14 for connecting to a horizontal sheath pipe 2 on a side wall 12 is installed passing through a concrete structure 7. The connection opening 14 is arranged above the bottom 13 of the vertical sheath pipe 1. The bottom 13 of the vertical sheath pipe 1 is provided with a protrusion 15. The vertical sheath pipe 1 accommodates an elbow joint 4 which is supported by the protrusion 15. A clearance D is provided between the lower part of the elbow joint 4 and the bottom 13 of the vertical sheath pipe 1 for a cutting tool to be moved back and forth.

Description

  The present invention relates to a technique for updating a drain pipe installed through a concrete structure part of a building to connect an indoor drain pipe and an outdoor drain pipe of the building without breaking the concrete structure part, The present invention relates to a structure of a sheath tube that accommodates and protects the drainage pipe that is installed through.

Conventional drainage pipes in kitchens, baths, toilets, etc. of buildings are laid directly in the concrete structure part of the building, and the concrete structure part has to be broken in order to renew the drainage pipe.
In view of the actual situation, in order to facilitate the renewal of the drainage pipe, a sheath pipe for the drainage pipe is installed in the concrete structure part, and when the drainage pipe is renewed, the inside of the sheath pipe is not destroyed without breaking the concrete structure part. A construction method has been proposed in which only the drainage pipe is renewed (see, for example, Patent Document 1).
Moreover, when installing the sheath pipe for drainage pipes in a concrete structure part, the piping structure which prevents the shift | offset | difference of the fixed position of the said sheath pipe by the pouring of concrete is proposed (for example, refer patent document 2).

JP 2009-102929 A JP 2009-127227 A

In the former method of the prior art, it is necessary to cut the drain pipe when the drain pipe is renewed. In order to cut the drain pipe, a cutting tool such as a saw or a cutter is applied to the outer peripheral surface of the drain pipe. There is a practical problem that a sufficient space for the operation cannot be secured and the cutting operation of the drain pipe is extremely difficult.
Further, the drainage horizontal pipe connected to the outdoor drainage pipe needs to be provided with a predetermined drainage gradient of about 1/50 or 1/100 in order to prevent the drainage from staying in the drainage pipe. In the horizontal sheath pipe, the horizontal sheath pipe is installed horizontally, and a sealing material is provided between the horizontal drain pipe and the lateral sheath pipe to ensure watertightness from the outside. Since it is provided so as to hold the drainage horizontal drawing pipe accommodated therein, there has been a construction problem that it is difficult to accurately install the drainage horizontal drawing pipe in a predetermined drainage gradient in the horizontal sheath pipe.

The latter piping structure in the prior art is formed by providing a sheath-like pipe fixing part on the outer peripheral surface of the side part to accommodate the drain pipe, and directly engaging the pipe fixing part with the reinforcing bar, Alternatively, the sheath tube is supported by the reinforcement bar through a wire, but the bottom part of the sheath tube is not fixed, so the sheath pipe is pushed against the concrete that flows when the concrete is placed. It was easy to move from the initial fixed position. If the sheath tube is displaced and fixed, the position of the drainage pipe accommodated in this will also shift, making it difficult to connect to the indoor and outdoor drainage pipes, or ensuring that the drainage pipe has an adequate gradient and will not drain. It was necessary to take measures to prevent the sheath tube from moving when placing concrete, as it could cause a situation where it would stay.
Moreover, in the concrete structure part, when the drainage pipe and the sheath pipe are installed through, it is determined that the distance (cover) to the bar arrangement is 40 mm or more, but the drainage pipe in the piping structure is accommodated. Since the sheath pipe is inevitably formed with an outer diameter larger than that of the drain pipe, the distance from the bar arrangement is often close when the concrete structure is penetrated, and the sheath pipe is not sufficiently fixed. As described above, when the concrete is placed, the sheath tube moves and is installed closer to the bar arrangement than the above distance, which may cause the bar arrangement to corrode.
Furthermore, in the said piping structure, all the members used for piping, such as a drainage vertical pipe, a drainage horizontal drawing pipe, and an elbow joint accommodated in this, must be shape | molded as an exclusive member with a sheath pipe, and member cost becomes expensive. Therefore, there was a practical problem that the initial construction cost and the construction cost when renewing the drain pipe increased.

  In view of such a problem of the prior art, the present invention has an object to enable easy and efficient renewal work of a drain pipe in a concrete structure part using a general-purpose piping member. To do.

  In order to solve the above-mentioned problems, the present invention includes a longitudinal sheath pipe that can accommodate a drainage vertical pipe and an elbow joint, and a lateral sheath pipe connection port that accommodates a drainage horizontal pulling pipe on its side surface, together with the lateral sheath pipe A drain pipe sheath pipe installed through the concrete structure, wherein the connection port is provided upward from the bottom of the vertical sheath pipe, and the elbow joint is accommodated in the vertical sheath pipe, It is provided so that a predetermined space | interval may be ensured between the vertical sheath pipe bottom parts.

In the sheath pipe for drainage pipe of the present invention, in the above-described configuration, the protrusion that supports the drainage horizontal pulling pipe that is accommodated in the elbow joint or the transverse sheath pipe that is accommodated in the longitudinal sheath pipe and is inserted into the connection port from below is the longitudinal sheath. It is provided at the bottom of the tube.
Further, in the above configuration, a connection port is provided so that an axis passing through the center of the connection port is inclined downward and intersects with an axis passing through the center of the upper end opening and the bottom of the vertical sheath tube, and connected to the connection port. A horizontal sheath pipe and a drainage horizontal pulling pipe housed in the horizontal sheath pipe and having an end connected to an elbow joint are configured to be installed in parallel with a predetermined drainage gradient.
Furthermore, the said structure WHEREIN: The guide piece for fixing to a concrete structure is provided in the outer surface of the lower end part of a longitudinal sheath pipe, It is characterized by the above-mentioned.

Moreover, the sheath tube structure of the present invention is characterized by comprising a sheath tube for a drain pipe having the above-described configuration and a transverse sheath tube connected to the sheath tube.
Furthermore, the drain pipe structure of the present invention includes a drain pipe sheath tube and a transverse sheath pipe having the above-described configuration that penetrate through a concrete structure, and a drain vertical pipe, an elbow joint, and a drain horizontal draw pipe that are accommodated in the both sheath pipes. The drainage pipe is connected by connecting the pipes.

According to the sheath pipe for the drain pipe of the present invention, the drain pipe is provided so that a predetermined interval is secured between the lower part of the elbow joint of the elbow joint housed in the longitudinal sheath pipe and the bottom portion of the longitudinal sheath pipe. When renewing the pipe, insert a cutting tool from the upper end opening and push the cutting tool up and down within the space with the cutting tool applied to the outer peripheral surface of the elbow joint or drainage horizontal pulling pipe. The drain pipe accommodated in the pipe can be easily cut.
In addition, the projection provided on the bottom of the longitudinal sheath pipe supports the elbow joint and the drainage horizontal pulling pipe from below, and the connection port to which the transverse sheath pipe is connected is inclined downward from the side surface of the longitudinal sheath pipe. As long as a horizontal sheath pipe is connected to the connection port and the end of the drainage horizontal pipe accommodated in the horizontal sheath pipe is connected to the elbow joint, the drainage horizontal pipe is installed at a predetermined drainage gradient. By connecting the drainage horizontal pipe to the elbow joint, the drainage horizontal pipe is set to the specified drainage gradient, so adjustment work to give the drainage horizontal gradient to the drainage horizontal pipe becomes unnecessary, and the construction work is greatly reduced. The time can be shortened and the occurrence of drainage pool in the drainpipe can be suppressed.
Further, since the sheath pipe for drainage pipe of the present invention has a guide piece for fixing to the concrete structure portion, anchor bolts or the like are driven into the guide piece so that the sheath pipe is firmly attached to the mounting surface of the concrete structure portion. The fixing position of the sheath tube does not move even when pressed by the flowing concrete at the time of placing the concrete, and the separation distance from the reinforcing bar can be properly maintained. Even if pushed by flowing concrete, the sheath tube does not move and can be firmly fixed to the original mounting surface, so there is no need to re-install or modify the sheath tube, and it is accommodated in the sheath tube. It is possible to connect the indoor and outdoor drain pipes reliably and watertightly through the drain pipe.
Furthermore, the pipe structure of the sheath pipe structure and the drain pipe of the present invention is formed by forming only the drain pipe sheath pipe having the above-described configuration capable of accommodating the drain vertical pipe and the elbow joint as a dedicated member, and the other constituent members are general-purpose. Since a member can be used, it can be installed at a low construction cost and the drainage pipe can be updated.

It is principal part sectional drawing of the concrete structure part which shows the piping structure of the drain pipe of one Embodiment of this invention. It is the principal part top view of FIG. 1, Comprising: It is the figure which fractured | ruptured and showed the principal part of the sheath pipe | tube and the drain pipe accommodated in this. It is the front view, top view, and side view of a longitudinal sheath pipe. It is the figure which showed the longitudinal cross-section of the longitudinal sheath pipe. (A)-(C) are the figures for demonstrating the construction process of the piping structure of a drain pipe. (A)-(C) are the figures for demonstrating the construction process of the piping structure of the drain pipe following FIG.

A preferred embodiment of the present invention will be described with reference to the drawings.
1 and 2 show a piping structure of a drain pipe according to an embodiment of the present invention, which is obtained by attaching a longitudinal sheath pipe 1 and a transverse sheath pipe 2 on a foundation mounting surface 7a of a concrete structure portion 7 in advance. Then, by placing concrete and forming the concrete structure portion 7, the longitudinal sheath tube 1 and the transverse sheath tube 2 are installed through the concrete structure portion 7, and the longitudinal sheath tube 1 and the transverse sheath tube 2 The drainage vertical pipe 3 and the elbow joint 4 and the drainage horizontal pipe 5 are accommodated and connected to each other, and then indoor and outdoor drainage pipes (not shown) are respectively connected to the ends of the drainage vertical pipe 3 and the drainage horizontal pipe 5. It connects and constitutes a drain pipe.
In the figure, reference numeral 6 denotes a waterproof packing installed at the ends of the transverse sheath pipe 2 and the drainage horizontal drawing pipe 5, and 8 denotes a reinforcing bar arranged in a lattice structure in the concrete structure part 6.

As shown in FIGS. 3 and 4, the longitudinal sheath 1 is formed into a vertically long bottomed cylindrical shape using a synthetic resin material such as vinyl chloride resin.
Specifically, the vertical sheath pipe 1 is formed to have a size capable of accommodating the drainage vertical pipe 3 and the elbow joint 4, for example, the upper end opening 11 has an opening dimension of about 150 mm on all sides and a height of about 400 mm. On the side surface 12, a cylindrical connection port 14 is fitted at the position spaced apart from the bottom 13 upward by a predetermined distance. In a state in which the joint 4 is accommodated, a predetermined distance D is provided between the lower end portion of the elbow joint 4 and the bottom sheath tube 1 bottom portion 13 (see FIG. 1).
The space D secured between the lower portion of the elbow joint 4 and the bottom portion 13 of the vertical sheath pipe 1 is used to separate the connection portion of the elbow joint 4 and the drainage horizontal pulling pipe 5 when the drainage pipe is updated. It is a space for allowing the cutting tool to be pushed up and down in a state where the cutting tool is inserted into the longitudinal sheath tube 1 and pressed against the connecting portion, and this space is secured at least 10 mm in the height direction. If so, the cutting tool can be pushed and pulled. On the other hand, if this space is too large, the depth of concrete pouring becomes deep and this is not economically preferable. That is, the distance D between the lower part of the elbow joint 4 and the bottom 13 of the longitudinal sheath 1 is preferably in the range of 10 mm to 400 mm, more preferably in the range of 15 mm to 300 mm, and still more preferably in the range of 20 mm to 200 mm. It is better to be in the range.

The connection port 14 is a cylindrical portion that protrudes from the side surface 12 of the longitudinal sheath tube 1 with an appropriate width, and is formed in a shape in which the end portion of the lateral sheath tube 2 is joined by being externally fitted or internally fitted. . The shape of the connection port may be a receiving port or an insertion port, and the length of the receiving port or the insertion port may be any length that allows the transverse sheath tube 2 to be connected to a predetermined gradient.
As shown in FIG. 4, the connection port 14 has a horizontal line at the intersection of the axis B passing through the center of the connection port 14 with respect to the axis A passing through the center of the connection port 14 with respect to the axis A passing through the center of the upper end opening 11 and the bottom 13 of the longitudinal sheath 1. The connection port 14 is provided so as to protrude downwardly from the side surface 12 of the longitudinal sheath tube 1 at an intersection angle α between H and the axis B, and by connecting the transverse sheath tube 2 to the connection port 14 The drainage gradient of the transverse sheath 2 is set to the inclination angle α.
By providing the connection port 14 with being inclined downward with respect to the vertical axis of the longitudinal sheath 1, the drainage gradient set in the transverse sheath 2 connected to the connection port 14 is 1/100 or more. Is preferable, and if it is 1/50 or more, it is more preferable. The upper limit of the drainage gradient is not particularly regulated by law, but is preferably 1/10 or less in the gradient of the drainage pipe of a building. For example, in the case of detached drainage, if the pipe diameter is 75A or less, the drainage gradient is often 1/50, so the drainage gradient of the transverse sheath pipe may be 1/50.

On the inner surface of the bottom portion 13 of the longitudinal sheath tube 1, a projection 15 is provided at an appropriate height so as to be adjacent to the connection port 14 and support the lower part of the outer peripheral surface of the elbow joint 4 or the drainage horizontal pulling tube 5. is there.
The protruding height of the projection 15 is set so that the drainage horizontal pulling pipe 5 is installed at a predetermined drainage gradient in a state where the elbow joint 4 or the drainage horizontal pulling pipe 5 is placed on the upper end thereof. It is preferable that the upper end of the projection 15 is provided in a shape along the curved surfaces of the outer peripheral lower portions of both members so that the elbow joint 4 or the drainage horizontal pipe 5 is securely held at the upper end of the projection 15. It is preferable.

Further, a guide piece 16 provided with a groove portion 16a with which a fixture 9 such as an anchor bolt is engaged is integrally projected on the left and right side portions and the rear portion of the outer periphery of the lower end portion of the vertical sheath tube 1.
Furthermore, when both sides of the longitudinal sheath tube 1 are wound with a wire around the longitudinal sheath tube 1 and the wire is bound to the reinforcing bar 8 to fix the longitudinal sheath tube 1, the wire can be easily wound. A plurality of ridges 17 for suppressing movement are provided in a row.

The pipe structure of the present embodiment is such that only the vertical sheath pipe 1 is molded as a dedicated member, and other constituent members such as the horizontal sheath pipe 2, the drainage vertical pipe 3, the elbow joint 4, the drainage horizontal draw pipe 5, etc. Is constructed using general-purpose products.
Hereinafter, the construction procedure will be described with reference to FIGS.

First, as shown in FIG. 5A, on the foundation mounting surface 7a of the concrete structure portion 7, the longitudinal sheath pipe 1 is borrowed at the planned installation position, and the pipe length of the transverse sheath pipe 2 is measured. At this time, the level SL is placed on the upper end opening 11 of the longitudinal sheath tube 1 and it is confirmed that the longitudinal sheath tube 1 is installed so that the upper end opening 11 is horizontal. adjust. When the pipe length of the transverse sheath tube 2 exceeds 1 m, the drainage gradient cannot be secured, and therefore the longitudinal sheath tube 1 is raised with a cover plate or the like.
Next, as shown in FIG. 5B, the vertical sheath 1 is fixed by driving the fixing tool 9 from the groove 16a of the guide piece 16 to the foundation mounting surface 7a. If necessary, a wire is wound around the circumferential surface of the longitudinal sheath tube 1 and bound to the reinforcing bar 8 to strengthen the fixation. When the longitudinal sheath 1 is fixed, the end of the transverse sheath 2 is bonded and fixed to the connection port 14.
Then, as shown in FIG. 3C, the opening portions of the longitudinal sheath tube 1 and the transverse sheath tube 2 are closed with a curing tape T or the like.

If the vertical sheath tube 1 and the transverse sheath tube 2 are fixed on the foundation mounting surface 7a, concrete is cast to form the concrete structure portion 7, and after the concrete is cast, as shown in FIG. 6 (A). The excess part 11a at the upper end of the longitudinal sheath 1 is cut off with a cutting tool. Then, the drainage horizontal draw pipe 5 is inserted from the opening of the horizontal sheath pipe 2, and the end circumferential surface of the drainage horizontal draw pipe 5 projecting into the vertical sheath pipe 1 from the end opening 11 side of the vertical sheath pipe 1. Operate and apply adhesive.
Next, as shown in FIG. 2B, one end of the elbow joint 4 is adhesively bonded to the lower end of the drainage vertical pipe 3, and an adhesive is applied to the inner peripheral surface of the other end of the elbow joint 4. The elbow joint 4 and the drainage horizontal pulling pipe are inserted into the vertical sheath pipe 1 through the end opening 11 and the outer periphery lower part of the elbow joint 4 abuts the upper end of the projection 15 projecting from the bottom 13. 5 and adhesively bonded.
In addition, if the elbow joint 4 is transparent or semi-transparent, it is possible to visually check the connection site with the drainage horizontal draw pipe 5 even in a narrow work space in the vertical sheath pipe 1, It is preferable because water leakage due to insufficient insertion can be prevented.
Then, as shown in FIG. 2C, the waterproof packing 6 is pushed into the gap between the end portions of the horizontal sheath pipe 2 and the drainage horizontal pulling pipe 5 and finished with a sealing material or the like as necessary. Thus, the installation of the pipe members accommodated in the longitudinal sheath tube 1, the transverse sheath tube 2 and the both sheath tubes is completed.

According to the piping structure of the drain pipe of the present embodiment configured as described above, the vertical sheath pipe 1 is fixed by hitting the fixing tool 9 to the guide piece 16 on the foundation mounting surface 7a of the concrete structure portion 7. The installation position does not move at the time of placing, and the longitudinal sheath tube 1 and the transverse sheath tube 2 can be securely fixed and installed at the initial planned installation positions.
Further, since the gap D is provided between the lower portion of the elbow joint 4 and the bottom portion 13 of the vertical sheath pipe 1 in the vertical sheath pipe 1, the vertical sheath pipe 1 is used when the drain pipe is updated. The cutting tool is inserted from the upper end opening 11 of the, and the connecting part of the elbow joint 4 and the drainage horizontal pulling pipe 5 is moved into the gap D by moving the cutting tool up and down to push and pull the cutting tool. It can be easily cut, and the water distribution pipe can be updated easily and efficiently.
Further, the connecting portion of the drainage horizontal pulling tube 5 to the elbow joint 4 is supported at a predetermined height by the projection 15 provided on the bottom portion 13 of the vertical sheath tube 1, and the connection port 14 is connected to the side surface of the vertical sheath tube 1. Since the horizontal sheath pipe 2 is connected to the connection port 14 and the drainage horizontal pulling pipe 5 accommodated in the horizontal sheath pipe 2 is connected to the elbow joint 4, the horizontal drainage of the drainage is provided. Since the pipe 5 is installed in parallel with the transverse sheath pipe 2 at a predetermined drainage gradient, adjustment work for providing the drainage gradient becomes unnecessary, and generation of a drainage pool in the drainage pipe can be suppressed. is there. In addition, the said parallel means the state which the horizontal sheath pipe 2 and the drainage horizontal draw pipe 5 are substantially parallel, and after construction is performed by the above-mentioned construction procedure etc., the state where drainage cannot be stored in the drainage horizontal draw pipe 5 Say.

In addition, the illustrated piping structure of the drain pipe and the form of the constituent members constituting the drain pipe are examples, and the present invention is not limited to these forms, and can also be constructed by procedures other than the illustrated construction procedure. .
In the illustrated piping structure, the sheath tube structure of the present invention is constituted by the longitudinal sheath tube 1 formed into a dedicated product and the transverse sheath tube 2 which is a general-purpose product. 2. For example, a combination with a transverse sheath pipe formed according to a construction place of the pipe may be used. Moreover, you may comprise the piping structure of this invention using steel piping materials other than the synthetic resin piping materials.

DESCRIPTION OF SYMBOLS 1 Vertical sheath pipe, 11 End part opening, 12 Side surface, 13 Bottom part, 14 Connection port, 15 Protrusion part, 16 Guide piece, 17 Convex strip, 2 Horizontal sheath pipe, 3 Drainage vertical pipe, 4 Elbow joint, 5 Drainage horizontal pulling Pipe, 6 Waterproof packing, 7 Concrete structure, 7a Foundation mounting surface, 8 Reinforcement, 9 Fastener, SL level, T curing tape

Claims (6)

For drainage pipes that have a longitudinal sheath pipe that can accommodate drainage vertical pipes and elbow joints, and a lateral sheath pipe connection port that accommodates a drainage horizontal pulling pipe on the side surface, and is installed through the concrete structure part with the transverse sheath pipe A sheath tube,
The connection port is provided above the bottom portion of the longitudinal sheath tube, and a predetermined gap is secured between the lower end portion of the elbow joint and the bottom portion of the longitudinal sheath tube in a state where the elbow joint is accommodated in the longitudinal sheath tube. A sheath pipe for a drain pipe characterized by being provided in   The projection part which supports the drainage horizontal drawing pipe accommodated in the elbow joint accommodated in a longitudinal sheath pipe or a transverse sheath pipe, and is penetrated by the connection port from the downward direction is provided in the bottom part of a longitudinal sheath pipe. Sheath pipe for drainage pipe.   A connection port is provided so that an axis passing through the center of the connection port is inclined downward and intersects with an axis passing through the upper end opening and the center of the bottom of the longitudinal sheath tube, and the transverse sheath tube connected to the connection port and the horizontal The drainage pipe according to claim 1 or 2, wherein the drainage horizontal pipe accommodated in the sheath pipe and connected to an elbow joint at an end thereof is installed in parallel with a predetermined drainage gradient. Sheath tube.   The sheath pipe for drainage pipes according to any one of claims 1 to 3, wherein a guide piece for fixing to a concrete structure is provided on the outer surface of the lower end of the longitudinal sheath pipe.   The sheath pipe structure which consists of a sheath pipe for drainage pipes in any one of Claims 1-4, and a transverse sheath pipe. A drainage pipe sheath tube and a transverse sheath pipe according to any one of claims 1 to 4 are installed through a concrete structure, and a drainage vertical pipe, an elbow joint, and a drainage horizontal pipe that are accommodated in both sheath pipes are connected. A drainage pipe piping structure characterized by piping a drainage pipe.

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