JP2012007390A - Construction method of drainpipe to be buried in foundation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method of a drainpipe to be buried in foundation, capable of easily mounting an inner pipe in a sleeve pipe.SOLUTION: A drainpipe 2 to be buried in foundation comprises a sleeve pipe 10 and an inner pipe 20, of which body parts 11 and 21 have approximately the same bending radii S10 and S11, respectively. In a state that the inner pipe 20 is mounted in the sleeve pipe 10 buried in a foundation 1 of a building in a penetration state, a pipe axis L1 of the sleeve pipe 10 and a pipe axis L2 of the inner pipe 20, or a pipe axis of the circular arcuate body part 11 and a pipe axis of the circular body part 21, approximately coincide to each other. In order to insert the inner pipe 20 into the sleeve pipe 10 buried in foundation 1 of a building, after a downstream pipe end 20A of the inner pipe 20 is inserted into an upstream pipe end 10B of the sleeve pipe 10, the inner pipe 20 is rotated around an axis in the insertion direction of the inner pipe 20, so as to reach a position where the pipe axis L1 of the body part 11 of the sleeve pipe 10 and the pipe axis L2 of the body part 21 of the inner pipe 20 approximately coincide to each other through the insertion into the sleeve pipe 10.

Description

  The present invention relates to a drainage pipe for buried in a foundation of a building.

Drainage pipes that have been embedded in the foundation of the building in such a way that drainage from drainage facilities such as toilets, vanities, bathrooms, downpipe (roof drain pipes), or water collection tanks that have been placed in buildings There is provided a drainage structure that is adapted to be discharged to the outside through the door.
Further, as the drainage pipe, one constituted by a sheath pipe embedded in the foundation and an inner pipe mounted in the sheath pipe has been proposed (for example, see Patent Document 1). In this way, when the drainage pipe embedded in the foundation in a penetrating manner is constituted by a sheath pipe and an inner pipe, the inner pipe can be detached from the sheath pipe, so that the inner pipe is not damaged without damaging the foundation. Inspection and replacement can be easily performed.

JP 2008-150889 A (FIG. 2)

  However, in the configuration of Patent Document 1, the flexible pipe joint as the inner pipe is formed of a straight tube-shaped molded body, and the operator attaches the flexible pipe joint when installing the flexible pipe joint in the sheath pipe. There is a problem that workability is not good because it is necessary to forcibly bend the wire along the sheath.

  In addition, as described above, the flexible pipe joint has a straight pipe shape, and there is a limit to the angle range in which the flexible pipe joint can be bent. As a result, the shape of the sheath pipe is restricted, and the rising portion of the foundation and the indoor side opening of the sheath pipe are limited. There is also a problem that it is difficult to compact the drainage pipe around the foundation of the building.

  Then, an object of this invention is to provide the construction method of the drainage pipe for foundation burying which can solve the said problem.

  The present invention is a construction of a drainage pipe for foundation burying comprising a substantially C-shaped sheath tube in a side view embedded in a foundation of a building and a substantially C-shaped inner tube in a side view mounted in the sheath tube. The sheath tube and the inner tube have a main body portion whose outer shape is curved in an arc shape, and the bending radii of the main body portions of the sheath tube and the inner tube are set to be substantially the same. And the tube axis of the body portion of the sheath tube and the tube shaft of the body portion of the inner tube are substantially in a state where the inner tube is mounted in the sheath tube embedded in the foundation of the building in a penetrating manner. The tube is formed of a molded body having a curved pipe shape that matches, and the downstream pipe end of the inner pipe is inserted into the sheath pipe embedded in the foundation of the building. The tube axis of the main body portion of the sheath tube and the tube axis of the main body portion of the inner tube are rotated while the inner tube is rotated about the insertion direction of the inner tube. A method of constructing foundation buried drainage pipe, characterized in that gradually inserted into matching the sheath tube to the position.

  When the inner tube and the sheath tube have the above shapes, the operator can slide the inner tube into the sheath tube so as to draw an arc along the sheath tube without forcibly bending the inner tube. . Further, when trying to insert the inner tube into the sheath tube, even if an obstacle such as a wall rising from the foundation may interfere with the inner tube, the inner tube is appropriately avoided to avoid the obstacle. And the inner tube can be inserted into the sheath tube to an appropriate position while rotating about the insertion direction of the inner tube. Therefore, in the construction method of the drainage pipe for foundation burying, it is not necessary to give an excessive force to the inner pipe, so that workability is very good.

  In the above configuration, when the wall rising from the foundation is obstructive when inserting the inner tube, when the downstream tube end of the inner tube is inserted into the upstream tube end of the sheath tube, the body portion of the inner tube What is necessary is just to make it the direction of an upstream edge part differ from the direction of the downstream edge part of the main-body part in this sheath pipe.

  Further, the inner pipe is provided with straight pipe-shaped receiving portions at the upstream end portion and the downstream end portion of the main body portion, respectively, and the main body portion is provided on the outer peripheral surface of the main body portion. A plurality of annular protrusions that are formed along the circumferential direction of the inner tube and that protrude outwardly are formed at intervals along the tube axis direction of the inner tube. The portion is preferably located in a region on the tube axis side of the main body portion with respect to the outermost arc of the inner tube formed by connecting the tips of the annular convex portions of the main body portion in a side view.

  Here, the annular convex portion reduces the contact area between the sheath tube and the inner tube during a detachment operation such as when the inner tube is inserted into the sheath tube or when the inner tube is removed from the sheath tube. The frictional resistance generated between the sheath tube and the inner tube is reduced, but the size and shape of the receiving portion are arranged in a region closer to the tube axis of the main body than the outermost arc of the inner tube. By setting as described above, the inner tube can move smoothly and easily without being caught in the sheath tube.

  Further, after the inner pipe is inserted into the sheath pipe, when the downstream seal ring is interposed in the gap between the downstream pipe end of the inner pipe and the downstream pipe end of the sheath pipe, To move the inner pipe downstream to project the downstream pipe end of the inner pipe from the downstream pipe end of the sheath pipe, and then to the downstream pipe end of the projected inner pipe. The inner pipe is moved upstream in the sheath pipe while the downstream seal ring is fitted to the outer periphery, and the gap between the downstream pipe end of the sheath pipe and the downstream pipe end of the inner pipe is A downstream seal ring may be interposed.

  In the above configuration, since the inner tube can be easily moved along the tube axis direction in the sheath tube, the downstream seal ring can be easily attached by appropriately moving the downstream tube end of the inner tube. be able to.

  The construction method of the drainage pipe for foundation embedding according to the present invention has an effect that workability is extremely good because it is not necessary to apply an excessive force to the inner pipe when the inner pipe is inserted into the sheath pipe. When inserting the inner tube into the sheath tube, the direction of the inner tube can be changed as appropriate to perform an insertion operation without being obstructed by surrounding obstacles.

Longitudinal section of foundation buried drain pipe a) is a longitudinal sectional view of the sheath tube, and b) is a longitudinal sectional view of the inner tube. It is a figure explaining the process which inserts an inner pipe | tube in a sheath pipe, an upper stage is a perspective view, a middle stage is a top view, and a lower stage is a side view. It is a figure explaining the process which inserts an inner pipe | tube in a sheath pipe, an upper stage is a perspective view, a middle stage is a top view, and a lower stage is a side view. It is a figure explaining the process which inserts an inner pipe | tube in a sheath pipe, an upper stage is a perspective view, a middle stage is a top view, and a lower stage is a side view. It is a figure explaining the process which inserts an inner pipe | tube in a sheath pipe, an upper stage is a perspective view, a middle stage is a top view, and a lower stage is a side view. It is a figure explaining the process which inserts an inner pipe | tube in a sheath pipe, an upper stage is a perspective view, a middle stage is a top view, and a lower stage is a side view. Explanatory drawing which shows the state at the time of attaching a downstream seal ring

The construction method of the foundation burying drainage pipe 2 used by being buried in the foundation 1 of the building will be described with reference to FIG.
As shown in FIG. 1, the foundation burying drain pipe 2 includes a sheath pipe 10 embedded in the foundation 1. As shown in FIG. 2 a, the sheath tube 10 is formed of a molded body having a circular cross section, a non-concave shape on the inner and outer peripheral surfaces, and a substantially C-shaped curved tube shape in side view. A main body portion 11 (arc portion) curved in an arc shape, an upstream straight pipe portion 12B extending from an upstream end portion 11B of the main body portion 11, and a downstream end portion 11A of the main body portion 11 are extended. A downstream straight pipe portion 12A. In the sheath tube 10, when embedded in the foundation 1, the downstream pipe end portion 10 </ b> A opens in a substantially horizontal direction on the outdoor side, and the upstream pipe end portion 10 </ b> B is connected to the foundation 1. Open on the floor side substantially vertically upward.

  For example, the sheath tube 10 is preferably formed of a hard vinyl chloride resin material.

  In the sheath tube 5 in this embodiment, the inner diameter S1 shown in FIG. 2a is set to 129.2 mm, the outer diameter S2 is set to 135 mm, and the bending radius S10 of the main body 11 in the sheath tube 10 is set to 300 mm. ing. The axial length S3 of the upstream straight pipe portion 12B is set to 57 mm, the axial length S4 of the downstream straight pipe portion 12A is set to 57 mm, and the total axial length S5 of the tube axis L1 of the sheath pipe 5 is set to 585 mm. Has been.

  As shown in FIG. 1, the foundation burying drainage pipe 2 includes an inner pipe 20 mounted in the sheath pipe 10. As shown in FIG. 2b, the inner tube 20 is formed of a molded body having a circular cross section, a non-concave shape on the inner peripheral surface, and a curved tube shape having a substantially C-shaped side view that can be deformed in cross section.

  The inner tube 20 will be described in more detail. The inner tube 20 has a main body portion 21 (arc portion) that is curved in an arc shape, and a straight pipe shape provided at an end portion 21B on the upstream side of the main body portion 21. It has an upstream receiving port 22B and a straight pipe-shaped downstream receiving port 22A provided at an end 21A on the downstream side of the main body 21.

  The main body portion 21 of the inner pipe 20 is preferably formed of a synthetic rubber such as styrene-butadiene rubber (SBR), a thermoplastic elastomer, or a soft vinyl chloride resin material. , 22B is preferably formed of, for example, a hard vinyl chloride resin material.

  In the inner tube 20 in this embodiment, the inner diameter S6 shown in FIG. 2b is set to 107 mm and the outer diameter is set to 114 mm, and the bending radius S11 of the main body portion 21 in the inner tube 20 is the same as that of the sheath tube 10. The bending radius S10 of the main body 11 is set to the same value. Further, the axial length S8 in the upstream receiving portion 22B is set to 50 mm, the axial length S9 in the downstream receiving portion 22A is set to 50 mm, the axial length S5 of the tube axis L1 in the sheath tube 10 and the inner tube 20 The axial length of the tube axis L2 is set to be substantially the same.

  Further, on the outer peripheral surface of the main body portion 21 of the inner tube 20, an annular convex portion 23 is formed which is configured by fitting an annular ring body along the circumferential direction of the main body portion 21. The annular convex portion 23 protrudes outward with respect to the outer peripheral surface of the main body portion 21, and a plurality of the annular convex portions 23 are formed at intervals along the tube axis direction of the main body portion 21 of the inner tube 20. The annular projecting portion 23 is formed by the sheath tube 10 and the inner tube 20 during the detachment operation such as when the inner tube 20 is inserted into the sheath tube 10 or when the inner tube 20 is extracted from the sheath tube 10. The frictional resistance generated between the sheath tube 10 and the inner tube 20 is reduced by reducing the contact area.

  As shown in FIG. 2b, the receiving portions 22A and 22B of the inner tube 20 in a side view state are connected to the tips of the annular convex portions 23 of the main body portion 21 in a side view state. It is set so as to be located in a region closer to the tube axis L2 than the inner tube outermost arc k.

Next, the construction method of the above-mentioned foundation embedding drain pipe 2 will be described in detail with reference to FIGS. 3 to 7 (in order from a to e).
First, the sheath tube 10 is embedded in the foundation 1, and the downstream tube end portion 20A of the inner tube 20 is inserted into the upstream tube end portion 10B of the embedded sheath tube 10 as shown in FIG. At this time, in order to avoid interference between the wall (not shown) rising on the foundation 1 and the inner tube 20, the direction m2 of the upstream end 21B of the main body 21 in the inner tube 20 and the sheath tube 10 The direction m1 of the downstream end portion 11B of the main body portion 11 is set differently.

  Next, as shown in FIGS. 4 to 6, the inner tube 20 is rotated in the sheath tube 10 around the insertion direction of the inner tube 20 (clockwise in plan view in FIGS. 4 to 6). ) Without forcibly bending the inner tube 20, the sheath tube 10 is moved to a position where the tube axis L1 of the sheath tube 10 and the tube axis L2 of the inner tube 20 substantially coincide (see FIGS. 1 and 7). Insert it so that it slides into 10.

  Next, as shown in FIGS. 1 and 8, in a state where the inner tube 20 is inserted into the sheath tube 10, the downstream tube end portion 20 </ b> A of the inner tube 20 and the downstream tube end of the sheath tube 10. A downstream seal ring 30A is interposed in the gap G1 with the portion 10A, and an upstream seal ring is provided in the gap between the upstream tube end 20B of the inner tube 20 and the upstream tube end 10B of the sheath tube 10. 30B is interposed.

Here, a specific mounting method of the downstream seal ring 30A will be described. As shown in FIG. 8, the inner tube 20 inserted into the sheath tube 10 is moved downstream in the sheath tube 10. (FIG. 8 a), the downstream tube end 20 </ b> A of the inner tube 20 is projected from the downstream tube end 10 </ b> A of the sheath tube 10. Then, while fitting the downstream seal ring 30A on the outer periphery of the downstream pipe end 20A of the protruded inner pipe 20 (FIG. 8b), the inner pipe 20 is pushed into the sheath pipe 10 and again the downstream pipe. The end 20A is disposed in the sheath tube 10, and the downstream seal ring 30A is interposed in the gap G1 (FIG. 8c).
Thereby, the watertightness between the sheath pipe 10 and the inner pipe 20 is ensured, and the construction of the foundation burying drain pipe 2 is completed.

  In the above construction completion state, as shown in FIG. 1, the tube axis L1 of the sheath tube 10 and the tube axis L2 of the inner tube 20 coincide with each other, thereby at least the main body of the sheath tube 10 The tube axis of the portion 11 and the tube axis of the main body portion 21 of the inner tube 20 are in agreement. In addition, the interval between the inner tube 20 and the sheath tube 20 (clearance between the inner peripheral surface of the sheath tube 20 and the tip of the annular convex portion 23 of the inner tube 20) T in the construction completion state shown in FIG. It is set to be 1 mm or more.

  The downstream side of the foundation burying drain pipe 2 can be communicated with, for example, a drainage basin (not shown) buried outdoors. On the other hand, the upstream side can be communicated with a drainage facility (not shown) such as a toilet. Further, in the upstream pipe end portion 10B of the sheath pipe 10, the drainage equipment is connected via the extension sheath pipe 40 by connecting a separate extension sheath pipe 40 so as to be detachable. Can be communicated to.

In the construction completion state, the inner tube 20 is arranged in the sheath tube 10 while maintaining the bent tube shape as a molded body, and the inner peripheral surface of the inner tube 20 is formed with unevenness that prevents drainage. It is hard to be done.
Further, in the above construction method, as shown in FIGS. 3 to 7, it can be easily inserted into the sheath tube 10 only by applying a light insertion force to the inner tube 20, and the downstream side seal ring 30A is interposed between the gaps. Can be easily attached to G1.

  As shown in FIG. 1, a contact step 31 protruding outward is formed on the outer peripheral surface of the downstream seal ring 30A, and the downstream seal ring 30A is connected to the inner tube 20 and the In a state of being interposed between the sheath tube 10, the corresponding stepped portion 31 comes into contact with the tube mouth edge of the downstream tube end portion 10 </ b> A of the sheath tube 10. Therefore, the downstream seal ring 30A does not enter the inside of the sheath tube 10 at the time of mounting.

  Further, the pipe wall of the downstream pipe end portion 10 of the sheath pipe 10 is set in a taper shape extending to the outdoor side, and the downstream seal ring 30A is located upstream of the installed downstream seal ring 30A. The narrow gap part G2 set to a dimension narrower than the thickness of is formed. That is, in the above configuration, since the downstream seal ring 30A cannot pass through the narrow gap portion G2, the downstream seal ring 30A does not enter the sheath tube 10 too much.

  By the way, when an operator checks the foundation burying drain pipe 2 in order to prevent water leakage, the inner pipe 20 is moved slightly downstream in the sheath pipe 10, and the downstream of the sheath pipe 10 is moved. The downstream seal ring 30A can be removed while the downstream tube end 20A of the inner tube 20 protrudes from the side tube end 10A. In this way, the above-described foundation burying drainage pipe 2 can easily perform the attaching / detaching operation of the downstream seal ring 30A.

The present invention is not limited to the above-described embodiments, and can be appropriately changed in design without departing from the gist of the present invention.
For example, the inner tube 20 is a molded body of a synthetic rubber such as styrene-butadiene rubber (SBR), a thermoplastic elastomer, or a soft vinyl chloride resin material. Instead, the inner tube 20 is a molded body of a hard vinyl chloride resin material. May be.

DESCRIPTION OF SYMBOLS 1 Foundation 2 Drainage pipe 10 for foundation burial 10 Sheath pipe 10A Downstream side pipe end part 10B Upstream side pipe end part 11 Main part (arc part)
11A, 11B Main body end 20 Inner pipe 20A Downstream pipe end 20B Upstream pipe end 21 Main body (arc portion)
21A, 21B End portions 22A, 22B of main body portion Receiving portion 23 Annular convex portion 30A Downstream seal ring k Inner tube outermost arcs L1, L2 Pipe axes S10, S11 Bending radius m1 Downstream end portion of main body portion in sheath tube Direction m2 Direction of the upstream end of the main body in the inner pipe

Claims (4)

A method for constructing a drainage pipe for foundation burying comprising a substantially C-shaped sheath pipe in a side view embedded in a foundation of a building and a substantially C-shaped inner pipe in a side view mounted in the sheath pipe. ,
The sheath tube and the inner tube are
It has a main body whose outer shape is curved in an arc shape,
The bending radii of the main body portions of the sheath tube and the inner tube are set to be substantially the same,
In addition, the tube axis of the main body portion of the sheath tube and the tube axis of the main body portion of the inner tube substantially coincide with each other in a state in which the inner tube is mounted in the sheath tube embedded in the base of the building in a penetrating manner. It is composed of a molded body that is shaped like a curved pipe,
In order to insert the inner pipe into the sheath pipe embedded in the foundation of the building, the downstream pipe end of the inner pipe is inserted into the upstream pipe end of the sheath pipe, and then the inner pipe is inserted into the inner pipe. The tube is inserted into the sheath tube until the tube axis of the main body portion of the sheath tube and the tube shaft of the main body portion of the inner tube substantially coincide with each other while rotating about the insertion direction of the sheath tube. Construction method for buried drainage pipes.   When the downstream pipe end of the inner pipe is inserted into the upstream pipe end of the sheath pipe, the direction of the upstream end of the main body section in the inner pipe and the downstream end of the main body section in the sheath pipe The construction method of the drainage pipe for foundation embedding according to claim 1, wherein the direction of the part is different. The inner tube is
Straight pipe-shaped receiving portions are respectively provided at the upstream end and the downstream end of the main body,
In addition, a plurality of annular convex portions that are formed along the circumferential direction of the main body portion and project outward are formed on the outer peripheral surface of the main body portion at intervals along the tube axis direction of the inner tube. And
When viewed from the side, the receiving portion of the inner tube is connected to the tip of each annular convex portion of the main body in a side view and is closer to the tube axis of the main body than the outermost arc of the inner tube. The construction method of the drainage pipe for foundation embedding according to claim 1 or 2 which is located in the field. After the inner tube is inserted into the sheath tube, the downstream seal ring is interposed in the gap between the downstream tube end of the inner tube and the downstream tube end of the sheath tube.
The inner pipe is moved downstream in the sheath pipe to project the downstream pipe end of the inner pipe from the downstream pipe end of the sheath pipe, and then the downstream pipe of the projected inner pipe A gap between the downstream tube end of the sheath tube and the downstream tube end of the inner tube while moving the inner tube upstream in the sheath tube while fitting the downstream seal ring to the outer periphery of the end portion The construction method of the drainage pipe for foundation embedding according to any one of claims 1 to 3, wherein the downstream seal ring is interposed in the foundation.