JP2015068139A - Piping unit and piping construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain effects on improvement in workability by eliminating cutting and removal of a floor material for installation or pipe change.SOLUTION: There is provided a piping unit that includes a straight pipe member 10 having a flow passage formed vertically and includes a straight pipe part 2 for letting drain water flow down, and an elbow 4 connected to a downstream side of the straight pipe member 10 and changing the flow passage of the drain water from a vertical direction to a horizontal direction, a connection socket 3 of the straight pipe member 10 and the elbow 4 being connected detachably in a non-fixed state with a rubber ring interposed.

Description

  The present invention relates to a piping unit and a piping construction method.

Conventionally, a building such as a detached house or a condominium is provided with a drainage piping structure such as a toilet or a bathroom on each floor as described in Patent Document 1.
As such a toilet piping structure, in the underfloor space, a straight pipe portion extending vertically downward from the toilet drain and a curved pipe connected to the lower end of the straight pipe portion are integrally bonded and fixed. A horizontal pipe extending in a substantially horizontal direction with a predetermined drainage gradient is connected to the downstream end of the bent pipe.

JP 2003-342984 A

However, in the conventional piping structure, when the toilet bowl is changed to a new one, the curved pipe provided in the underfloor space and the straight pipe member are bonded and fixed, so the straight pipe member is cut on the floor material. Remove the toilet bowl. And since the cut straight pipe member is integrated with the curved pipe under the floor by bonding, the curved pipe and the straight pipe member are cut and removed after removing the straight pipe member under the floor and the floor material around the curved pipe connecting portion. There is a problem that it takes time and effort to work.
In addition, when renovating the entire floor and installing a new flooring and toilet, the flooring is usually installed and toilets and other equipment are carried into the toilet room, but the straight pipe and curved pipe are integrated. Since the flooring must be constructed after connecting the pipe joint and the horizontal pipe, the equipment cannot be carried in until the pipe joint and the horizontal pipe are installed. There was a problem that it took, and there was room for improvement in that respect.

  The present invention has been made in view of the above-described problems. A pipe unit and a pipe construction method capable of improving workability by eliminating the cutting and removal of flooring during installation or modification. The purpose is to provide.

  In order to achieve the above object, in the piping unit according to the present invention, the flow path is formed in the vertical direction, the straight pipe member having a straight pipe portion for flowing down the drainage, and connected to the downstream side of the straight pipe member, A curved pipe that changes the flow path of the drainage from the vertical direction to the horizontal direction, and the straight pipe member and the curved pipe are connected in a non-fixed state and detachably through a rubber ring having a water-stopping property. It is characterized by having.

  Further, in the pipe construction method according to the present invention, the flow path is formed in the vertical direction, the straight pipe member having a straight pipe portion for allowing the drainage to flow down, and connected to the downstream side of the straight pipe member, the drainage flow path A curved pipe that changes the horizontal direction from the vertical direction, and the curved pipe is connected to a horizontal pipe that extends in a horizontal direction in an underfloor space below a flooring of a building, and the curved pipe is connected to the curved pipe A piping construction method of a piping unit in which a straight pipe member is installed through the floor material, wherein the straight pipe member is detached from the curved pipe in the underfloor space, and the straight pipe member is disposed above the floor material. And a step of drawing another straight pipe member through the floor material and connecting the curved pipe to the curved pipe in a non-fixed state through a rubber ring having a water-stopping property.

  In the present invention, since the straight pipe member is connected to the curved pipe in a non-fixed state, only the straight pipe member can be easily detached, and another straight pipe member is not fixed to the curved pipe. It can be easily connected simply by fitting in the state. Therefore, when the toilet bowl is replaced by renovation, etc., the floor material is cut and removed and then integrated by bonding, as in the case where the curved pipe and the straight pipe member provided in the underfloor space are bonded and fixed. Since the labor and time-consuming work of taking out and replacing the entire bent pipe and the straight pipe member becomes unnecessary, it is possible to improve the construction efficiency.

  Further, in the piping unit according to the present invention, the flow path is formed in the vertical direction, the straight pipe member having a straight pipe part for flowing down the drainage, and connected to the downstream side of the straight pipe member, A curved pipe that changes from the vertical direction to the horizontal direction, and the straight pipe member has a spiral shape in which an upstream end is connected to the straight pipe and a downstream end is connected to the curved pipe. A connecting socket with blades is provided, and the straight pipe part and the connecting socket are detachably connected in a non-fixed state via a rubber ring having water-stopping property.

  Further, in the pipe construction method according to the present invention, the flow path is formed in the vertical direction, the straight pipe member having a straight pipe portion for allowing the drainage to flow down, and connected to the downstream side of the straight pipe member, the drainage flow path A curved pipe that changes the vertical pipe from the vertical direction to the horizontal pipe, and the straight pipe member has an upstream end connected to the straight pipe and a downstream end connected to the curved pipe. A connecting socket with blades is provided, and the curved pipe is connected to a horizontal pipe extending in a horizontal direction in an underfloor space below the floor of the building, and the connecting socket is connected to the curved pipe, A piping construction method of a piping unit in which the straight pipe portion connected to a connection socket is installed through the floor material, wherein the straight pipe portion is detached from the connection socket in the underfloor space, and the straight pipe A process of pulling out the part above the flooring and another straight pipe part to the flooring Is characterized by comprising a step of connecting the non-stuck through the rubber ring having a water-stopping in the connection socket is communicated, the.

 In the present invention, since the connection socket 3 is connected to the curved pipe in a non-adhered state, only the connection socket or only the straight pipe portion and the connection socket can be easily detached. It can be easily connected to the bent pipe simply by fitting it in a non-fixed state. Therefore, when the toilet is replaced by remodeling, etc., the bent material provided in the underfloor space and the connection socket are bonded and fixed. Since the labor and time-consuming work of taking out and replacing the entire pipe and the straight pipe member are unnecessary, it is possible to improve the construction efficiency.

  Further, in the piping unit according to the present invention, a positioning mark indicating the horizontal flow path side of the curved pipe is provided at the upstream end of the downstream piping that constitutes the connecting portion via the rubber ring. It is preferable.

  By comprising in this way, the horizontal flow path direction of a curved pipe can be confirmed by visually observing the positioning mark of the said downstream piping arrange | positioned in underfloor space from the top of a flooring. Therefore, even when the upstream pipe connected to the downstream pipe is provided with a member for guiding the drainage direction such as a blade member, the position of the blade member can be positioned without mistake by matching the direction of the curved pipe. .

  According to the piping unit and the piping construction method of the present invention, it is possible to improve the workability by eliminating the cutting and removal of the floor material at the time of installation or when changing the pipe.

It is a principal part longitudinal cross-sectional view which shows the state which installed the piping unit by the 1st Embodiment of this invention in underfloor space. It is a perspective view which shows the structure of a straight pipe part. It is a partially transparent perspective view which shows the structure of a connection socket. It is a perspective view which shows the structure of an elbow. It is a perspective view which shows the connection state of a piping unit, Comprising: It is the figure which connected the connection socket to the elbow. It is a top view which shows the structure of the positioning mark provided in the elbow. (A)-(d) is a figure which shows the installation process of the piping unit of this Embodiment. (A)-(c) is a figure which shows the replacement | exchange process of the piping unit of this Embodiment. It is a perspective view which shows the other connection state of a piping unit, Comprising: It is the figure which connected the connection socket to the elbow. It is a perspective view which shows the structure of the elbow by 2nd Embodiment. It is a perspective view which shows the state which connected the straight pipe member to the elbow shown in FIG. It is the figure which looked at the state which connected the connection socket to the elbow from the top, (a) is the figure of the state where the spiral blade is not hitting the drainage, (b) is the figure of the state where the spiral blade is hitting the drainage is there. It is a top view for demonstrating the positioning method of a connection socket, Comprising: (a) is a figure of the state before positioning a spiral blade, (b) is a figure of the state after positioning a spiral blade. It is a perspective view which shows the connection state of another piping unit.

  Hereinafter, a piping unit and a piping construction method according to an embodiment of the present invention will be described in detail based on the drawings.

(First embodiment)
The piping unit 1 of this Embodiment shown in FIG. 1 has taken the case of the drainage system applied to the drainage of toilets, such as a detached house.
As shown in FIG. 1, the toilet drainage system in which the piping unit 1 of the present embodiment is used is a toilet 6 installed on the flooring 5 and an underfloor space R between the flooring 5 and the foundation 7. The toilet pipe unit 1 is installed and connected to a horizontal pipe 8 extending in a substantially horizontal direction with a predetermined drainage gradient.

The toilet 6 to which the piping unit 1 of the present embodiment is applied includes a toilet main body 61 and a trap 62 for storing sealed water that blocks the space between the toilet main body 61 and the piping unit 1. Then, the toilet 6 is made to flow wash water (drainage) after its use, so that solids and the like present in the toilet body 61 flow together with the wash water and pass through the trap 62.
The trap 62 includes a valley-like turn portion 62a that curves in a valley shape, and a mountain-like turn portion 62b that curves in a mountain shape.

The piping unit 1 is disposed below the floor material 5 on which the toilet 6 is installed, and has a straight pipe portion 2 connected to an upper socket 63 attached to a trap 62 and a downstream end of the straight pipe portion 2. And a elbow (curved pipe) 4 connected to the downstream end of the connection socket 3. The straight pipe portion 2 and the connection socket 3 constitute a straight pipe member 10.
The horizontal drawing pipe 8 described above is connected to the elbow 4 and extends in the horizontal direction with a predetermined drainage gradient. Note that a downstream side of the horizontal pipe 8 is connected to a drainage basin (not shown) installed outside the foundation 7 via a drainage header (not shown).

  As shown in FIG. 2, the straight pipe portion 2 is formed by a cylindrical pipe formed by an injection molding method and extending linearly.

  As shown in FIG. 3, the connection socket 3 includes a large-diameter cylindrical portion 31 on the upper side and a small-diameter cylindrical portion 32 on the lower side, and the flow path of the piping unit 1 is drained inside the small-diameter cylindrical portion 32. A spiral blade 33 is provided to prevent negative pressure from being applied to the space upstream of the blocked portion by being blocked. In the connection socket 3, the straight tube portion 2 is fitted and connected to the upper end side end portion of the large diameter cylindrical portion 31, and the elbow 4 is externally connected to the lower end side end portion of the small diameter cylindrical portion 32.

  The spiral blade 33 is a plate-like member having a curved shape along the inner peripheral surface of the connection socket 3 in plan view. The outer peripheral surface 33a of the spiral blade 33 extends around a part of the spiral along the inner peripheral surface of the connection socket 3 with the axis 3c of the connection socket 3 as the center. Further, the upper surface 33b of the spiral blade 33 has a rectifying surface that receives a part of the drainage and regulates the downward flow of the drainage in a state where the connection socket 3 is attached to the straight pipe portion 2 and guides it in a predetermined direction. It is formed to become. The formation range of the spiral blade 33 is set to a half pitch to a half pitch of the virtual spiral shape formed on the inner peripheral surface of the connection socket 3. The spiral blade 33 prevents the turbulent flow of the drainage so as not to block the inside of the piping unit. Therefore, it is possible to prevent the negative pressure from being generated inside the piping unit, thereby preventing a decrease in the sealing water. There is an effect that can be. In particular, even when a piping unit is installed in a water-saving toilet or a narrow underfloor space, there is an effect that a high drainage function or fluid transfer performance can be obtained, and a reduction in sealing water can be prevented.

  In addition, a protrusion 34 having a circular cross section protruding outward in the radial direction is provided on the outer peripheral surface of the small diameter cylindrical portion 32 of the connection socket 3. The formation position of the protrusion 34 is the spiral start position of the spiral blade 33 in the circumferential direction of the outer surface, and is disposed at a position that is at an appropriate height from the downstream end.

  As shown in FIG. 4, the elbow 4 is a pipe joint that connects the connection socket 3 and the horizontal draw pipe 8 (see FIG. 1) arranged at an angle of approximately 90 degrees. In the elbow 4, a wall portion that receives the drainage substantially opposite to the flow direction of the drainage flowing down from the straight pipe member 10 is a curved portion 41 that is curved and changes the drainage flow path. The elbow 4 has a diameter larger than that of the bending portion 41 on the upstream side and the downstream side of the bending portion 41. A small-diameter cylindrical portion 32 of the connection socket 3 is fitted and connected to the upstream side enlarged diameter portion 42, and a horizontal pipe 8 is fitted and connected to the downstream side enlarged diameter portion 43.

  In addition, a rubber ring 45 having water-stopping properties is provided along the circumferential direction of the elbow 4 on the inner surface of the upstream side enlarged diameter portion 42 of the elbow 4. That is, the connection socket 3 is detachably connected to the elbow 4 through the rubber ring 45 in a non-fixed state. As the rubber ring 45, an O-ring, packing or the like can be used.

  A concave cutout 44 for fitting the projection 34 of the connection socket 3 is formed at the upper end of the upstream diameter-increased portion 42 of the elbow 4. By fitting the protrusion 34 into the notch 44, the connection socket 3 and the elbow 4 are positioned in the circumferential direction around the axis 3c (see FIG. 5).

  Further, as shown in FIG. 6, a positioning mark P indicating the horizontal flow path side (direction of the horizontal draw pipe 8) of the elbow 4 is provided at the upstream end of the elbow 4. As the positioning mark P, it is possible to use a display written with ink, a seal, a protrusion, a recess, or the like.

  As shown in FIG. 1, the piping unit 1 configured in this way is connected to each other, that is, between the upper socket 63 and the straight pipe part 2, between the straight pipe part 2 and the connection socket 3, and between the connection socket 3 and the elbow 4. The elbow 4 and the horizontal drawing tube 8 are connected to each other by an adhesive.

  As shown in FIG. 5, the connection procedure of the piping unit 1 is as follows. First, after connecting the connection socket 3 to the elbow 4 connected to the horizontal pipe 8, the straight pipe portion 2 is connected to the connection socket 3. Connecting. Alternatively, the connection socket 3 is connected to the downstream end of the straight pipe portion 2 in advance and integrated, and the integrated connection socket 3 is connected to the elbow 4 connected to the horizontal pipe 8. It is also possible to use a procedure (see FIG. 9).

Next, a method of installing the piping unit 1 in the underfloor space R will be described based on the drawings.
In order to install the piping unit 1 having the straight pipe portion 2, the connection socket 3, and the elbow 4 having the above-described configuration in the underfloor space R, first, the horizontal drawing pipe 8 shown in FIG. The flooring 5 shown in (b) is installed. And as shown in FIG.7 (b), while inserting the elbow 4 from the downstream edge part side from the through-hole 5a opened in the flooring 5, and connecting it to the horizontal drawing pipe 8, an upstream edge part is made. Adhere and fix in the state of facing upward.

  And the bending direction of the elbow 4 is confirmed and the connection socket 3 is connected as shown in FIG.5 and FIG.7 (c). At this time, by fitting the projection 34 of the connection socket 3 into the notch 44 of the elbow 4, the connection socket 3 is fitted to the elbow 4 so that the spiral blade 33 (see FIG. 3) faces the bending direction in the circumferential direction. Can be fixed together. At this time, an adhesive is applied to the outer peripheral surface of the small diameter cylindrical portion 32 of the connection socket 3 so that the elbow 4 and the connection socket 3 are firmly fixed.

Next, as shown in FIGS. 5 and 7 (d), the straight pipe portion 2 is connected to the upstream end portion of the connection socket 3 through the through hole 5 a of the flooring 5. At this time, an adhesive is applied to the outer peripheral surface of the straight pipe portion 2 so that the connection socket 3 and the straight pipe portion 2 are firmly fixed. Thereby, as shown in FIG. 1, the toilet 6 is installed so that the straight pipe part 2 may be fitted to the upper socket 63 provided in the outlet of the toilet 6, and the construction is completed.
In this state, the spiral blade 33 in the connection socket 3 is discharged from the toilet 6 and flows down vertically by the straight pipe portion 2 at the straightening surface of the spiral blade 33, and the flow along the shape of the straightening surface is received. Thus, the flow path can be changed. Therefore, the drainage can be smoothly guided to the curved portion 41 of the elbow 4 by changing the flow path along the inner peripheral surface of the connection socket 3 according to the shape of the rectifying surface of the spiral blade 33 and starting to turn. In other words, it is possible to avoid the occurrence of turbulent flow or stagnation of the wastewater within the elbow 4, to allow the wastewater to flow down smoothly and at high speed, and to enhance the transport function of the wastewater and fluid.

Next, a construction method when changing the toilet 6 will be described with reference to the drawings.
Here, as shown in FIG. 1, when the toilet 6 is reformed, in the piping unit 1 including the straight pipe portion 2, the connection socket 3, and the elbow 4 installed in the underfloor space R, the straight pipe member 10 ( The construction procedure for exchanging the straight pipe portion 2 and the connection socket 3) will be described.

First, as shown to Fig.8 (a), the upper part from the flooring 5 of the straight pipe part 2 is cut | disconnected by the cut surface N, and the toilet bowl 6 is removed with the cut straight pipe part 2. FIG. Next, as shown in FIG. 8B, since the connection between the elbow 4 and the connection socket 3 is in a non-adhered state, the straight pipe member 10 can be pulled up from above the flooring 5 and separated from the elbow 4. .
Thereafter, as shown in FIGS. 8C and 9, another newly installed straight pipe portion 2 and the connection socket 3 are connected in advance with an adhesive, and this new straight pipe member 10 </ b> A is used as a flooring material. 5 is inserted into the through hole 5a from above the flooring 5 and fitted into the receiving port of the elbow 4 in the underfloor space R. Thereby, it can change to a new piping unit, Furthermore, a new toilet is attached to the upstream edge part of the straight pipe member 10A, and construction by renovation is completed.

Next, the operation of the piping unit according to the present embodiment will be described.
In the present embodiment, since the connection socket 3 is connected to the elbow 4 in a non-adhered state, only the connection socket 3 or only the straight pipe portion 2 and the connection socket 3 can be easily detached. It is possible to easily connect another connecting socket 3 simply by fitting it to the elbow 4 in a non-fixed state.
Therefore, when the toilet bowl is replaced by renovation or the like, the floor material 5 is cut and removed and then integrated by bonding as in the case where the elbow provided in the underfloor space R and the connection socket are bonded and fixed. Since the labor and time-consuming work of taking out and replacing the entire elbow and straight pipe member is not required, the construction efficiency can be improved.
Further, even when the floor and the toilet are newly installed by remodeling the floor, the floor material 5 is installed after the floor material 5 is installed by connecting only the elbow 4 to the horizontal pipe 8 in advance. 5 can be easily connected to the elbow 4 in a non-fixed state only by connecting the connection socket 3 or the straight pipe portion 2 and the connection socket 3 together.

  Further, a positioning mark P indicating the horizontal flow path side of the elbow 4 is provided at the upstream end (receiving port) of the downstream pipe (elbow 4 here) constituting the connecting portion via the rubber ring 45. Therefore, the horizontal flow path direction of the elbow 4 can be confirmed by visually observing the positioning mark P of the elbow 4 from above the flooring 5. Therefore, since the spiral blade 33 is provided in the connection socket 3 connected to the elbow 4, the position of the spiral blade 33 can be positioned without making a mistake according to the direction of the elbow 4.

  With the piping unit and the piping construction method configured as described above, it is possible to improve workability by eliminating the cutting and removal of the flooring 5 at the time of installation or pipe change.

  Next, other embodiments according to the piping unit and the piping construction method of the present invention will be described with reference to the accompanying drawings. A description of the configuration different from that of the first embodiment will be given by omitting the description.

(Second Embodiment)
The piping unit 1A according to the second embodiment shown in FIG. 10 can be selectively positioned at a predetermined position around the axis 3c (see FIG. 12) with respect to the elbow 4A. The position of the spiral blade 33 to be formed can be freely changed to a desired position. The elbow 4A according to the second embodiment has a configuration in which a plurality of (in this case, eight) cutout portions 44 are provided at a pitch of 45 degrees in the circumferential direction at the receiving port 4a at the upstream end. The protrusion 34 of the connection socket 3 can be selectively fitted into each of the notches 44.

  In this case, as shown in FIGS. 12A and 12B, the connection socket 3 can be positioned at an arbitrary rotation angle with respect to the receiving port 4 a of the elbow 4. Here, FIG. 12A shows the connection socket 3 in a position where the spiral blade 33 does not contact the drainage W. FIG. 12 (b) shows the connection socket 3 in a position where the spiral blade 33 is in contact with the drainage W.

  Specifically, as shown in FIG. 13 (a), the drainage W flowing down in the straight pipe portion 2 and the connection socket 3 by the position of the elbow 4A with respect to the toilet 6 (reference numerals F1, F2, F3, F4). The position in the pipe cross section has changed. For example, the drainage W flows at the position on the toilet socket 6 side of the connection socket 3 at the position of the reference socket F1, and the drainage W flows at the position of the connection socket 3 away from the toilet bowl 6 at the position of the reference socket F2. The positions F1, F2, F3, and F4 of the elbow 4A shown in FIGS. 13 (a) and 13 (b) indicate the positions shifted by 90 ° at the rotational positions around the toilet bowl 6, respectively.

  And in this Embodiment, as shown in FIG.13 (b), the rotation angle from which the spiral blade 33 becomes a suitable position according to the position of the waste_water | drain W in the position F1, F2, F3, F4 of each elbow 4A, Thus, the connection socket 3 can be connected to the elbow 4A. For example, in the case of the position F4, most of the waste water W that does not hit the spiral blade 33 in FIG. Although there is a possibility that a water film is formed in the opening and negative pressure is generated inside the piping unit to cause a decrease in sealing water, the spiral blade 33 is positioned so as to hit the drainage W as shown in FIG. This can be prevented.

  As mentioned above, although embodiment of the piping unit and piping construction method by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.

  For example, in the above-described embodiment, the rubber ring 45 is provided at the connection portion between the connection socket 3 and the elbow 4, but the present invention is not limited to this connection portion. For example, a rubber ring may be provided at the connection portion between the straight pipe portion 2 and the connection socket 3 and connected in a non-fixed state. Further, the means for connection in a non-adhered state is not limited to the rubber ring, and for example, a fitting structure or a screw structure in which the inner surface of the socket 3 and the outer surface of the elbow 4 are engaged with each other may be used. It may be a structure.

  Moreover, in this Embodiment, although the straight pipe member 10 is made into the member which consists of the straight pipe part 2 and the connection socket 3, as shown in FIG. 14, the straight pipe member 10 is the structure which abbreviate | omitted the connection socket 3. It is also possible to employ one constituted only by the straight pipe portion 2A. A spiral blade 21 is provided on the inner surface of the straight pipe portion 2A. In this case, the downstream end portion of the straight pipe portion 2A is connected to the upstream end portion (receiving port) of the elbow 4.

Moreover, in this Embodiment, although the positioning mark P which shows the horizontal flow path side is provided in the upstream edge part of the elbow 4, it is not limited to this.
For example, when connecting the connection socket 3 to the elbow 4 in advance before connecting the straight pipe portion 2, positioning that indicates the horizontal flow path side of the elbow 4 at the upstream end of the connection socket 3. A mark P may be provided.
Further, the positioning mark P indicating the horizontal flow path side may be provided inside the curved portion of the elbow 4. In this case, the horizontal flow path direction is provided even after the straight pipe portion 2 and the connection socket 3 are provided. Can be confirmed.

  Furthermore, in the second embodiment, the circumferential interval of the notches 44 is 45 degrees, but the pitch is not limited to this, and a smaller pitch, for example, a 10 degree pitch, etc. It is also possible to set to.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

1 Piping unit 2 Straight pipe part 3 Connection socket 4 Elbow (curved pipe)
5 Floor material 6 Toilet bowl 8 Horizontally drawn pipe 10 Straight pipe member 33 Spiral blade (blade member)
34 Protrusion 41 Curved portion 44 Notch 45 Rubber wheel P Positioning mark R Underfloor space

Claims (5)

A straight pipe member having a straight pipe portion in which the flow path is formed in the vertical direction and allows the drainage to flow down;
A curved pipe connected to the downstream side of the straight pipe member and changing the flow path of the drainage from the vertical direction to the horizontal direction;
With
The piping unit, wherein the straight pipe member and the curved pipe are detachably connected in a non-fixed state via a rubber ring having water-stopping properties. A straight pipe member having a straight pipe portion in which the flow path is formed in the vertical direction and allows the drainage to flow down;
A curved pipe connected to the downstream side of the straight pipe member and changing the flow path of the drainage from the vertical direction to the horizontal direction;
With
The straight pipe member is provided with a connection socket with a spiral blade, the upstream end of which is connected to the straight pipe and the downstream end is connected to the curved pipe.
The piping unit, wherein the straight pipe portion and the connection socket are detachably connected in a non-fixed state via a rubber ring having water-stopping properties.   The positioning mark which shows the flow path side of the horizontal direction of the said curved pipe is provided in the upstream edge part of the downstream piping which comprises the connection part via the said rubber ring, The 1 or 2 characterized by the above-mentioned. The piping unit described in 1. A straight pipe member having a straight pipe portion in which the flow path is formed in the vertical direction and allows the drainage to flow down;
A curved pipe connected to the downstream side of the straight pipe member and changing the flow path of the drainage from the vertical direction to the horizontal direction,
A pipe unit in which the curved pipe is connected to a horizontal pipe extending horizontally in an underfloor space below a flooring of a building, and the straight pipe member connected to the curved pipe is installed through the flooring. A piping construction method,
Detaching the straight pipe member from the curved pipe in the underfloor space, and drawing the straight pipe member upward from the floor material;
Connecting another straight pipe member to the floor material and connecting to the curved pipe in a non-fixed state via a rubber ring having water-stopping property;
A piping construction method characterized by comprising: A straight pipe member having a straight pipe portion in which the flow path is formed in the vertical direction and allows the drainage to flow down;
A curved pipe connected to the downstream side of the straight pipe member and changing the flow path of the drainage from the vertical direction to the horizontal direction,
The straight pipe member is provided with a connection socket with a spiral blade, the upstream end of which is connected to the straight pipe and the downstream end is connected to the curved pipe.
The curved pipe is connected to a horizontal pipe extending horizontally in an underfloor space below the floor of the building, the connection socket is connected to the curved pipe, and the straight pipe portion connected to the connection socket includes A piping construction method of a piping unit installed through the floor material,
Detaching the straight pipe part from the connection socket in the underfloor space, and drawing the straight pipe part upward from the floor material;
A step of passing another straight pipe portion through the flooring and connecting to the connection socket in a non-adhering state via a rubber ring having water-stopping property;
A piping construction method characterized by comprising:

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