JP2013002211A - Drain piping structure of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain piping structure of a building, in which drain water flows down smoothly, dirt and sediment are prevented from being clogged, and maintenance is simply performed, and which is inexpensive.SOLUTION: A drain piping structure passes through a base concrete 13 of a building underfloor and discharges drain water from a drainage facility inside a building to the outside of the building. An outer straight pipe 15 is provided so as to penetrate the base concrete 13, and an inner straight pipe 12 is inserted into the outer straight pipe 15. One or two or more come-off preventing means 18, 20 are interposed between the outer straight pipe 15 and the inner straight pipe 12, a drain 14A connected with the drainage facility inside the building is connected to the inner end of the inner straight pipe 12, and a drain 14B outside the building is connected to the outer end of the inner straight pipe 12.

Description

  The present invention relates to a drain pipe structure for discharging drainage from a drainage facility inside a building to the outside of the building.

  In the conventional drainage pipe piping structure, as shown in FIG. 7, a sheath pipe 15, which is an outer pipe, is provided through the underfloor foundation concrete layer 13 of the building 2, and an inner pipe is provided inside the sheath pipe 15. A certain bellows-type flexible tube 12 is inserted, and the inner drain pipe 24A and the outer drain pipe 24B are connected to the inner end and the outer end of the flexible pipe 12 through pipe connecting joints 26 and 27, respectively. Configuration is adopted.

JP 2008-150889 A

  In the above-described conventional configuration, the sheath tube 15 that is the outer tube is a curved tube, and thus the inner tube is correspondingly formed as a bellows-type flexible tube 12 that can be bent. In this case, the drainage performance of the drainage is deteriorated, and there is a risk that clogging of dust, earth and sand, etc. occurs in the flexible tube 12.

As a means for solving the above-described conventional problems, the present invention is a drain pipe structure for discharging drainage from a drainage facility inside a building to the outside of the building through the foundation concrete layer under the building floor, An outer straight pipe is penetrated through the foundation concrete layer, and an inner straight pipe is inserted into the outer straight pipe. Between the outer straight pipe and the inner straight pipe, 1 One or two or more retaining prevention means are interposed, and an inner end of the inner straight pipe is connected to a drain pipe connected to a drainage facility inside the building, and an outer end of the inner straight pipe Is provided with a drainage pipe piping structure for a building, characterized in that the drainage pipe outside the building is connected.
For example, the retaining means for preventing the connection between the outer straight pipe and the inner straight pipe is recessed on the inner peripheral surface of the outer straight pipe or the outer peripheral surface of the inner straight pipe so as to extend in the circumferential direction. Or two or more locking grooves, and one or more locking protrusions protruding from the outer peripheral surface of the inner straight pipe or the inner peripheral surface of the outer straight pipe. One end of the stop groove is opened, and the other end is closed. In this case, an opening of the locking groove is formed on the inner peripheral surface of the outer straight pipe or the outer peripheral face of the inner straight pipe. It is desirable that the protrusion is formed so as to have a guide edge connected to one end of the outer periphery, and that the locking groove is formed by bulging the peripheral wall of the outer straight pipe outward. Is desirable.
Further, the retaining means for preventing the outer straight pipe and the inner straight pipe from coming off is an internal thread portion formed on the inner peripheral surface of the outer straight pipe or the outer peripheral surface of the inner straight pipe, and the outer periphery of the inner straight pipe. And a male screw part formed on the inner peripheral surface of the outer straight pipe and screwed into the female screw part.

[Action]
In the present invention, in the drain pipe structure for draining the waste water from the inside of the building to the outside of the building, the outside straight pipe 15 penetrating the foundation concrete 13 under the floor of the building 2 is a straight pipe, corresponding to this. Since the inner straight pipe 12 inserted into the outer straight pipe 15 and connected to the drain pipe 14A inside and outside the building is also a straight pipe, the drainage can flow smoothly, and dirt, earth and sand can be clogged. Hard to occur.
In addition, a complicated forming method is employed for manufacturing the flexible tube, but a straight tube can be manufactured by a simple forming method.
Furthermore, when the outer tube is a bent tube, a flexible tube inserted into the bent tube has a certain amount of space between the inner periphery of the bent tube and the outer periphery of the flexible tube so as to bend easily in the bent tube. Although it is necessary to provide a margin, in the present invention, since the outer tube and the inner tube are both straight pipes, such a margin is not required, so that the outer tube can be reduced in outer dimensions. Since the thickness of the foundation concrete 13 in the outer pipe penetration portion can be increased by that amount, the strength of the foundation concrete 13 is improved.
In the present invention, one or more retaining means are interposed between the outer straight pipe 15 and the inner straight pipe 12, and the inner straight pipe 12 is the outer straight pipe. 15 is prevented from coming off, that is, its movement in the axial direction is suppressed, so that it is easy to attach pipe connection joints 16 and 17 for connecting the inner drain pipe 14A to the inner and outer ends of the inner straight pipe 12. become.
Further, the retaining means includes one or more locking grooves 18 recessed in the inner peripheral surface of the outer straight tube 15 or the outer peripheral surface of the inner straight tube 12, and the inner straight tube. With one or two or more locking projections 20 projecting from the outer peripheral surface or the inner peripheral surface of the outer straight pipe 15, one end of the locking groove 18 is opened and the other end is closed. The locking protrusions 20 and 20 are fitted into the locking grooves 18 and 18, and the locking protrusions 20 and 20 are brought into contact with the closed ends 18 </ b> A of the locking grooves 18 and 18 to prevent the locking protrusions (claims). Item 2), the inner peripheral surface of the outer straight tube 15 or the outer peripheral surface of the inner straight tube 12 so as to have a guide edge 19A connected to the open end 18A, which is one end of the locking grooves 18, 18. When the projecting portions 19 are formed on the inner straight tube 12, the inner straight tube 12 is inserted into the outer straight tube 15. Since the locking protrusions 20 and 20 are guided to the opening end 18A of the locking groove 18 by the guide edge 19A of the protrusion 19, the operation of fitting the locking protrusions 20 and 20 into the locking groove 18 is performed. (Claim 3).
Further, if the locking groove 18 is formed by bulging the peripheral wall of the outer straight pipe 15 outward, the uneven stepped portion due to the formation of the locking groove 18 is the outer periphery of the outer straight pipe 15. Since the step portion is hooked on the foundation concrete 13, the axial displacement of the outer straight pipe 15 with respect to the foundation concrete 13 can be suppressed. For example, the outer straight pipe 15 Since the wobbling or the like of the outer straight pipe 15 when the inner straight pipe 12 is inserted can be suppressed, the insertion work of the inner straight pipe 12 is facilitated (claim 4).
Further, the inner straight pipe 12 is also formed by forming a female screw portion 21 on the inner periphery of the outer straight pipe 15 and screwing a male screw portion 22 formed on the outer periphery of the inner straight pipe 12 to the female screw portion 21. The outer straight pipe 15 is prevented from coming off (Claim 5).

〔effect〕
In the present invention, since the straight pipe is used for both the outer pipe and the inner pipe in the drain pipe structure of the building, the drainage of the drainage is smoothly performed and clogging is less likely to occur in the pipe. In addition, since the straight pipe is manufactured much easier than the bent pipe or the flexible pipe, it is provided at a low cost.

Sectional drawing which shows the piping structure of this embodiment. (A), (b) is the front view and sectional drawing which show an outside straight pipe, (c) is a front view which shows an inside straight pipe. The expanded view which shows the internal peripheral surface shape of an outside straight pipe. The expanded view which shows the internal peripheral surface shape of the outer side straight pipe of another form. (A), (b) is the front view and sectional drawing which show the outside straight pipe of another form (A) is sectional drawing which shows the outer side straight pipe of another form, (b) is a front view which shows the inner side straight pipe of another form. Sectional drawing which shows the conventional piping structure.

The present invention will be described with reference to an embodiment shown in FIGS.
As shown in FIG. 1, an outer straight pipe 15 that is a sheath pipe is provided through the foundation concrete 13 under the floor of the building 2. An inner straight pipe 12 is inserted into the outer straight pipe 15. The inner straight pipe 12 is connected to a drain pipe 14A inside the building and a drain pipe 14B outside the building via pipe connecting joints 16 and 17 at the inner and outer ends of the outer straight pipe 15, respectively.
As shown in FIGS. 2 (a) and 2 (b), two locking grooves 18 and 18 are recessed at predetermined locations on the inner peripheral surface of the outer straight pipe 15 so as to extend in the circumferential direction. Has been. The locking grooves 18 and 18 have an open end 18A as one open end and a closed end 18B as the other closed end. V-shaped projecting portions 19 and 19 are formed in the building groove (18) and the building interior side (upstream side). The protrusions 19 and 19 are formed so that both side edges thereof are guide edges 19A and 19A, and the guide edges 19A and 19A are connected to the opening ends 18A and 18A of the locking grooves 18 and 18, respectively.
The locking grooves 18, 18 are formed by expanding the peripheral wall of the outer straight pipe 15 outward. By forming the locking grooves 18 and 18 with the peripheral wall of the outer straight pipe 15 bulging outward, an uneven step is formed on the outer peripheral surface of the outer straight pipe 15. When 15 is about to be displaced in the axial direction with respect to the foundation concrete 13, the stepped portion is caught on the foundation concrete 13, and such a displacement is suppressed.
The protrusions 19 and 19 are formed by expanding the peripheral wall of the outer straight pipe 15 inward, and the projections 19 and 19 are uneven on the outer peripheral surface of the outer straight pipe 15 in the same manner as the locking grooves 18 and 18. By forming the stepped portion, the positional deviation in the axial direction of the outer straight pipe 15 with respect to the basic concrete 13 is suppressed.
As shown in FIG. 2 (c), two opposing locking projections 20 and 20 project from the outer peripheral surface of the inner straight pipe 12 at predetermined locations. These locking projections 20 and 20 are formed in a circular shape in plan view (see FIG. 1).

The locking grooves 18 and 18 and the protrusions 19 and 19 are not limited to be formed by expanding the peripheral wall of the outer straight pipe 15. For example, the engaging grooves 18 and 18 and the protrusions 19 and 19 are related to the inner peripheral surface of the outer straight pipe 15. The stop grooves 18 and 18 may be recessed, or the protrusions 19 and 19 may be protruded.
The locking grooves 18 and 18 are recessed in the inner peripheral surface of the outer straight pipe 15, and the locking protrusions 20 and 20 are not limited to be protruded from the outer peripheral surface of the inner straight pipe 12. A locking projection as described above may be provided on the inner peripheral surface of the inner straight pipe 12, and a locking groove as described above may be provided in the outer peripheral surface of the inner straight pipe 12.

In the above configuration, the inner straight pipe 12 is inserted into the outer straight pipe 15 penetrating the foundation concrete 13 from the upstream side. In the insertion operation of the inner straight pipe 12, the inner straight pipe 12 is a straight pipe (straight-shaped pipe), and the outer straight pipe 15 is also a straight pipe. And there is no need to force it in, so the insertion work is greatly simplified.
Further, as described above, on the outer peripheral surface of the outer straight pipe 15, uneven step portions are formed by forming the locking grooves 18, 18, and the outer straight pipe 15 is inserted when the inner straight pipe 12 is inserted. Even if it is about to be displaced in the axial direction, the stepped portion is caught on the foundation concrete 13 to prevent the displacement, so that the outer straight pipe 15 is firmly fixed to the foundation concrete 13 and the insertion work is ensured. It can be carried out.
Further, in the case of a normal curved pipe, it is necessary to widen the gap between the inner peripheral surface of the outer straight pipe 15 and the outer peripheral face of the inner straight pipe 12 in order to prevent catching in insertion work. The outer straight pipe 15 and the inner straight pipe 12, which are straight pipes, are hardly caught by the insertion work, so that the gap can be reduced. As a result, since the outer diameter of the outer straight pipe 15 can be reduced, the cover thickness of the foundation concrete 13 can be increased, and the strength of the foundation concrete 13 can be improved.

FIG. 3 is a development view showing a state in which the peripheral wall of the outer straight pipe 15 is developed in a plane and viewed from the inner peripheral surface. In the process of inserting the inner straight pipe 12, the locking projection 20 of the inner straight pipe 12 abuts on the guide edge 19A of the protrusion 19 of the outer straight pipe 15 (position A). When the inner straight pipe 12 is further inserted into the outer straight pipe 15 as indicated by an arrow α, the locking projection 20 of the inner straight pipe 12 is guided to the guide edge of the protrusion 19 of the outer straight pipe 15. Guided by 19A in the direction indicated by arrow β, reaches the opening end 18A of the locking groove 18 (position B). In this state, the inner straight pipe 12 is rotated in the direction indicated by the arrow γ to bring the locking projection 20 to the closed end 18B of the locking groove 18 (position C).
The protrusions 19 are formed in a substantially isosceles triangle shape. The length of the bottom of the protrusion 19 is set to πr, where r is the radius of the outer straight pipe 15, that is, one half of the circumference of the outer straight pipe 15. Therefore, as shown by a two-dot chain line in FIG. 3, the locking projection 20 is located at any position with respect to the protruding portion 19 as long as the inner straight pipe 12 is inserted into the outer straight pipe 15. Even if there is, it is always guided by the guide edge 19 </ b> A and reaches the opening end 18 </ b> A of the locking groove 18.

In the state of the position C, the inner straight pipe 12 is prevented from coming off from the outer straight pipe 15 and is restricted from moving in the axial direction. Further, the inner straight pipe 12 is restricted from rotating with respect to the outer straight pipe 15 in a predetermined direction (the direction opposite to the arrow γ and the direction opposite to the rotation direction in the insertion process of the inner straight pipe 12). Therefore, the insertion and fixing of the inner straight pipe 12 with respect to the outer straight pipe 15 simply inserts the inner straight pipe 12 into the outer straight pipe 15 and stops the inner straight pipe 12 without the need for visual observation or the like. This is done simply and reliably by simply rotating the lens.
14A (upstream drainage pipe) and 14B (downstream drainage pipe) are connected to both ends of the inner straight pipe 12 after being inserted into the outer straight pipe 15 via pipe connection joints 16 and 17. Are connected to each other (see FIG. 1).
In the connection work of these pipe connection joints 16 and 17, since the inner straight pipe 12 is in a state in which movement in the axial direction is restricted, the inner straight pipe 12 may be wobbled or rotated carelessly. Therefore, the connection work is very easy. Further, the outer straight pipe 15 through which the inner straight pipe 12 is inserted and fixed is also firmly fixed to the foundation concrete 13 by the uneven step portions formed by the formation of the locking grooves 18, 18. Connection work of the connection joints 16 and 17 can be performed reliably.

In the above configuration, the outer straight pipe 15 and the inner straight pipe 12 that are straight pipes can be formed by a very simple molding method such as extrusion molding or blow molding, and the manufacturing cost, parts cost, etc. are low. Can be.
Moreover, if it is a normal curved pipe, since the flow-down performance will be reduced at the curved portion, it will cause clogging, etc., but the inner straight pipe 12 which is a straight pipe is very excellent in the flow-down performance. , Troubles such as clogging are less likely to occur.
Furthermore, although the above configuration is a very simple configuration, it has excellent flow-down performance, so that it is excellent in maintainability.

The present invention is not limited to the configuration described above, and may be modified as follows.
As shown in FIGS. 4, 5 </ b> A, and 5 </ b> B, the protrusions 19 and 19 may be linear ones extending in the circumferential direction of the outer straight pipe 15. In this case, when the inner straight pipe 12 is inserted into the outer straight pipe 15 as indicated by an arrow α, the locking projection 20 of the inner straight pipe 12 is moved to the protrusion 19 of the outer straight pipe 15. Abutting on the guide edge 19A (position A), the insertion of the inner straight pipe 12 is temporarily stopped. When the inner straight pipe 12 is rotated in the direction indicated by the arrow β from this state and pushed into the outer straight pipe 15 as indicated by the arrow γ, the locking projection 20 of the inner straight pipe 12 is engaged with the engagement. Reaching the open end 18A of the stop groove 18 (position B), the insertion of the inner straight pipe 12 stops again. In this state, the inner straight pipe 12 is rotated in the direction indicated by the arrow δ so that the locking projection 20 reaches the closed end 18B of the locking groove 18 (position C). Restricted movement to
As shown in FIG. 6, a female screw portion 21 may be provided on the inner peripheral surface of the outer straight tube 15, and a male screw portion 22 that is screwed with the female screw portion 21 may be provided on the outer peripheral surface of the inner straight tube 12. . Thus, even if the inner straight pipe 12 is screwed into the outer straight pipe 15 and the male screw part 22 is screwed into the female screw part 21, the inner straight pipe 12 is connected to the outer straight pipe 15. Movement in the axial direction is restricted.

  In the drain pipe structure according to the present invention, the drainage can be smoothly carried out and the clogging of dust and earth and sand can be prevented, so that the maintenance can be simplified and the use of the straight pipe can be provided at a low cost. There is industrial applicability.

12 Inner straight pipe 15 Outer straight pipe 18 Locking groove 19 Protruding portion 19A Guide edge 20 Locking protrusion

Claims (5)

A drain pipe structure that penetrates the foundation concrete layer under the building floor and discharges the waste water from the drainage equipment inside the building to the outside of the building,
In the foundation concrete layer, an outer straight pipe is provided,
The inside straight pipe is inserted inside the outside straight pipe,
One or more retaining means are interposed between the outer straight pipe and the inner straight pipe,
A drainage pipe connected to the drainage equipment inside the building is connected to the inner end of the inner straight pipe.
A drain pipe structure for a building, wherein a drain pipe outside the building is connected to an outer end of the inner straight pipe. The means for preventing the outer straight pipe and the inner straight pipe from coming off are:
One or more locking grooves recessed to extend in the circumferential direction on the inner peripheral surface of the outer straight pipe or the outer peripheral surface of the inner straight pipe;
One or more locking protrusions projecting from the outer peripheral surface of the inner straight pipe or the inner peripheral surface of the outer straight pipe;
The drain pipe structure for a building according to claim 1, wherein one end of the locking groove is opened and the other end is closed. The protrusion part is formed in the inner peripheral surface of the said outer side straight pipe, or the outer peripheral surface of the said inner side straight pipe so that it may have a guide edge connected to the end by which the said locking groove is opened. The drainage pipe piping structure of the building. The drainage pipe piping structure for a building according to claim 2 or 3, wherein the locking groove is formed by bulging the peripheral wall of the outer straight pipe outward. The retaining means for preventing the outer straight pipe and the inner straight pipe from coming off is
An internal thread formed on the inner peripheral surface of the outer straight pipe or the outer peripheral surface of the inner straight pipe; and
A male screw part formed on the outer peripheral surface of the inner straight pipe or the inner peripheral surface of the outer straight pipe, and screwed into the female screw part;
The building drain pipe structure according to claim 1, comprising:

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