JP5719180B2 - Piping method - Google Patents

Description

  The present invention relates to a pipe construction method used when connecting a hot water supply terminal of a dwelling unit water supply pipe and a water supply terminal of a dwelling unit water supply pipe to a water meter unit and a water heater provided outside the dwelling unit.

Conventionally, the plumbing procedure as described below connects the dwelling water supply pipe and the dwelling hot water supply pipe of each dwelling unit to the water meter unit provided outside the dwelling unit (see Patent Document 1) and the water heater. It is like that.
(1) As shown in FIG. 17, while connecting the dwelling unit water supply piping 100 and the dwelling unit hot water supply piping 200 to the equipment in each dwelling unit, the water supply terminal 110 of the dwelling unit water supply piping 100 and the hot water supply terminal of the dwelling unit hot water supply piping 200 210 is pulled out of the dwelling unit such as the meter box MB.
(2) As shown in FIG. 18, after connecting the water supply terminal 110 and the hot water supply terminal 210 facing the inside of the meter box MB to the hose 410 of the water pressure test pump 400 via the branch joint 300 dedicated to the water pressure test, The test pump 400 is operated to supply pressurized water, and water leakage from the connection between the pipe and equipment in the dwelling unit due to poor construction of the dwelling water supply pipe 100 and the dwelling hot water supply pipe 200, the connection part between the pipes, etc. Check for presence.
(3) As shown in FIG. 19, the water meter unit 500 is installed in the meter box MB, and the primary side 510 of the water meter unit 500 and the branch portion 610 of the water supply pipe 600 are connected. In addition, a first joint 700 having a branch portion 710 is connected to the secondary side 520 of the water meter unit 500.
(4) As shown in FIG. 20, the cinder concrete C is placed between the soils of the meter box MB, and the leg portions 550 of the water meter unit 500 are embedded in the cinder concrete C. Moreover, the drawer hole H of the dwelling unit water supply piping 100 and the dwelling unit hot water supply piping 200 is also embed | buried at this time.
(5) As shown in FIG. 21, the water heater 800 is attached in the meter box MB, and the branch joint 300 is detached from the dwelling unit water supply pipe 100 and the dwelling unit hot water supply pipe 200.
(6) As shown in FIG. 22, the dwelling unit water supply pipe 100 is connected to 710 of the first joint 700, and the primary pipe 810 of the water heater 800 is connected via the first joint 700.
(7) As shown in FIG. 22, the hot water supply terminal 210 of the dwelling unit hot water supply pipe 200 and the secondary side pipe 820 of the water heater 800 are connected. Note that the secondary side pipe 820 of the water heater 800 may be connected directly to the hot water terminal 210 and the water heater 800 or may be connected via a second joint.
(8) As shown in FIG. 23, a water meter 540 is attached instead of the temporary pipe 530 of the water meter unit 500.

JP 2004-204481 A

By the way, in a multi-story apartment building, since it is necessary to carry out the water pressure test of several dwelling unit hot water supply pipes and dwelling unit water supply pipes per day, it is necessary to speed up the water pressure test work.
Therefore, a large number of branch joints 300 are prepared, and a worker different from the worker who performs the water pressure test previously connects the water supply terminal 110 and the hot water supply terminal 210 of the dwelling unit that performs the water pressure test to the branch joint 300 in advance. By doing so, when the water pressure test operator completes the water pressure test of one dwelling unit, the connection between the hose 410 of the water pressure test pump 400 and the branch joint 300 is released, and the water pressure test pump 400 is connected. The water pressure test can be speeded up by repeating the water pressure test by transporting the hose 410 to the branch box 300 connected to the water supply terminal 110 and the hot water supply terminal 210 of the next dwelling unit. Can be achieved.

  However, since the branch joint 300 is completely unnecessary after the completion of the water pressure test, it is useless to prepare a large number of branch joints 300 as described above, and there is a problem that the construction cost is increased.

  In view of the above circumstances, an object of the present invention is to provide a piping construction method that can perform a hydraulic pressure test and reduce the construction cost without separately preparing a branch joint for a hydraulic pressure test.

  In order to achieve the above object, the pipe construction method according to the present invention includes a water supply terminal in a dwelling unit and a hot water supply in a dwelling unit via a water supply terminal of a dwelling unit water supply pipe drawn out of the dwelling unit and a hot water supply terminal of a dwelling unit hot water supply pipe. After performing a water pressure test process for supplying pressurized water to the piping, the first terminal and the water supply terminal, the secondary side piping of the water meter unit installed outside the dwelling unit, and the primary side piping of the water heater A pipe construction method for connecting the hot water supply terminal and a secondary side pipe of a water heater installed outside a dwelling unit through a second joint, wherein the water supply terminal is connected to the first joint. , Connecting the hot water supply terminal to the second joint, and connecting the secondary pipe of the water meter unit of the first joint to the secondary joint of the water heater of the second joint Separable from connection port to which side piping is connected The pressurized water is supplied from the connection port connected to the primary side piping of the water heater of the first joint, and the water pressure test step is performed.

In the present invention, the dwelling unit water supply pipe and the dwelling unit water supply pipe are not particularly limited, but a main pipe provided with a hot water supply terminal or a water supply terminal is connected to a header joint or the like provided under the floor in the dwelling unit, and the branch pipe After branching, the branch pipe is generally connected to equipment in the dwelling unit.
In the pipe construction method of the present invention, it is preferable that the first joint and the second joint include a connection mechanism that can separate the connection ports in the axial direction in a non-rotating state.
In the present invention, the connection mechanism that is separable in a non-rotating state is not particularly limited, and examples thereof include a connection mechanism using a fastener clip and a connection mechanism such as Sekisui Chemical Co., Ltd. trade name ESRON PEX header. .

Moreover, in the case of the piping construction method of the present invention, the first joint and the second joint can be connected to each other via the connection mechanism that can separate the connection ports in the axial direction in a non-rotating state as described above. After the water pressure test process is completed, the first joint and the second joint are separated, and the second joint is connected to the secondary side of the water heater with the hot water supply terminal connected to the second joint. as well as connected to a pipe, in a state of connecting the water supply terminal to the first joint, it is preferable to connect the first joint to the secondary side piping of the water meter unit.

Furthermore, in the case of the pipe construction method of the present invention, in the water pressure test, the length from the wall surface of the water supply terminal to the connection end of the secondary pipe of the water meter unit installed outside the dwelling unit is set as the connection length. You may make it leave.
In addition, the water supply terminal is connected to the first joint via the third joint, and the first joint and the third joint can be separated from each other in the axial direction in a non-rotating state. And a hot water supply terminal connected to the second joint through the fourth joint, and the second joint and the fourth joint are connected to each other in the axial direction. It is good also as a structure provided with the connection mechanism which can be isolate | separated in a non-rotation state.

In the construction method of the present invention, the pipe material used for the dwelling water supply pipe and dwelling hot water supply pipe is not particularly limited, but for example, a cross-linked polyethylene pipe, a resin pipe such as a polybutene pipe, an intermediate layer made of metal such as aluminum, etc. And a composite pipe (for example, trade name Super Estrometax manufactured by Sekisui Chemical Co., Ltd.) in which an inner layer and an outer layer are formed of a flexible resin such as polyethylene.
As the water pressure test pump, a commercially available pump that has been conventionally used can be used.

  The pipe construction method according to the present invention is a water pressure test for supplying pressurized water to a water supply pipe in a dwelling unit and a hot water supply pipe in a dwelling unit via a water supply terminal of a dwelling unit water supply pipe drawn out of the dwelling unit and a hot water supply terminal of a dwelling unit hot water supply pipe. After performing the process, while connecting the water supply terminal and the secondary side pipe of the water meter unit installed outside the dwelling unit and the primary side pipe of the water heater through the first joint, A pipe construction method for connecting the hot water supply terminal and a secondary side pipe of a water heater installed outside a dwelling unit via a joint, wherein the water supply terminal is connected to the first joint, and the second A connection port to which the hot water terminal is connected to a joint and to which a secondary pipe of a water meter unit of the first joint is connected and a secondary pipe of a water heater of a second joint is connected And the separable connection of the first joint Since pressurized water is supplied from the connection port connected to the primary pipe of the water heater, the water pressure test process is performed, so there is no need to prepare a branch joint for the water pressure test separately, and the water pressure test can be performed. Cost can be reduced.

It is a model diagram explaining 1 process of 1st Embodiment of the piping construction method concerning this invention. It is explanatory drawing which represents typically the state at the time of the water pressure test which is a post process of FIG. FIG. 3 is an explanatory diagram schematically showing a post-process of FIG. 2. FIG. 4 is an explanatory diagram schematically showing a post-process of FIG. 3. FIG. 5 is an explanatory diagram schematically showing a post-process of FIG. 4. It is a principal part front view explaining the state which connected each joint at the time of the water pressure test of FIG. 2, the water supply terminal, the hot water supply terminal, and the hose of the pump for water pressure tests. It is sectional drawing of FIG. It is a front view which decomposes | disassembles and demonstrates each joint and fastener clip used at the time of the water pressure test of FIG. It is sectional drawing showing the pipe connection structure of the cheese of the state of FIG.4 and FIG.5. FIG. 6 is a cross-sectional view showing a pipe connection structure of the elbow in the state of FIGS. 4 and 5. It is 2nd Embodiment of the piping construction method concerning this invention, Comprising: It is a principal part front view explaining the piping structure at the time of the water pressure test. It is sectional drawing of FIG. It is a front view which decomposes | disassembles and demonstrates each joint used at the time of the water pressure test of FIG. It is the figure which looked at the cheese shown in FIGS. 11-13 from the pipe-axis direction of the main pipe part. It is the figure which looked at the nipple joint shown in FIGS. 11-13 from the pipe-axis direction of the joint main body. It is 2nd Embodiment of the piping construction method concerning this invention, Comprising: It is sectional drawing showing the piping structure at the time of completion of construction of the cheese which is the 1st coupling. It is explanatory drawing which represents 1 process of the conventional piping construction method typically. FIG. 18 is an explanatory diagram schematically illustrating a post-process of FIG. 17. FIG. 19 is an explanatory diagram schematically illustrating a post-process of FIG. 18. FIG. 20 is an explanatory diagram schematically illustrating a post-process of FIG. 19. FIG. 21 is an explanatory diagram schematically illustrating a post-process of FIG. 20. FIG. 22 is an explanatory diagram schematically illustrating a post-process of FIG. 21. FIG. 23 is an explanatory diagram schematically illustrating a post-process of FIG. 22.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
1 to 5 schematically show the first embodiment of the pipe construction method of the present invention in the order of the steps.

This piping construction method is constructed as follows, for example.
(1) As shown in FIG. 1, the dwelling unit water supply pipe 100 and the dwelling unit hot water supply pipe 200 are piped in the dwelling unit, and the water supply terminal 110 and the hot water supply terminal 210 are placed in the meter box MB outside the dwelling unit. Pull it out.

(2) As shown in FIG. 2, the water meter unit 500 attached to the water meter position is installed in the soil (floor slab surface) of the meter box MB and fixed with anchor bolts or the like as necessary.
As shown in FIG. 9, the end of the secondary pipe 520 of the water meter unit 500 is set as a receiving port 521 into which a later-described cheese 1a outlet (nipple portion) 13 is fitted, and the end is not at the tip. A flange portion 522 that constitutes a part of a connection mechanism that can be separated in a rotating state projects outward, and an annular groove 523 is provided along the flange portion 522.
This structure may be formed by connecting the joint provided with the receiving port 521, the flange portion 522, and the annular groove 523 to the end of the existing water meter unit secondary side pipe having a screw connection structure. Absent.

(3) As shown in FIG. 2, the primary side pipe 510 of the water meter unit 500 and the branch portion 610 of the water supply pipe 600 are connected via a connecting pipe 630 with a valve 620 interposed.
The connecting pipe 630 includes, for example, a resin pipe such as a cross-linked polyethylene pipe, a polybutene pipe and a vinyl chloride resin pipe, an intermediate layer made of metal such as aluminum, and an inner layer and an outer layer are flexible resins such as polyethylene. Metal pipes such as composite pipes, lining steel pipes, stainless steel pipes, and stainless steel flexible pipes are used.

(4) As shown in FIG. 2, the cheese 1a that is the first joint and the elbow 2a that is the second joint are connected.
That is, as shown in FIGS. 6 to 8, the cheese 1 a extends from the main pipe part 11, the branch part 12 branched from the intermediate part of the main pipe part 11, and one end of the main pipe part 11. And a provided outlet 13.
The main pipe part 11 is provided with flange parts 14 and 14 that form part of a connection mechanism that protrudes outward and can be separated in a non-rotating state at both ends in the pipe axis direction, and is annular along the flange parts 14 and 14. Grooves 14a and 14a are provided.
The main body 11 has a receiving port 11c at the end opposite to the insertion port 13.
The branching portion 12 is a receiving port 12a having the same size as the receiving port 11c of the main tube unit 11, and is a flange portion 14 that forms a part of a connecting mechanism that protrudes outward at the tip and can be separated in a non-rotating state. And an annular groove 14 a is provided along the flange portion 14.
The differential port 13 is sized to fit into the receiving port 11c, and an O-ring 13b is fitted into two annular grooves 13a provided in the periphery.
On the other hand, the elbow 2a is formed with receiving ports 21 and 21 having both sides of the same size as the receiving port 11c of the main pipe portion 11, and a part of a connecting mechanism that protrudes outward at both ends and can be separated in a non-rotating state. The flange portions 22 and 22 are provided, and annular grooves 22 a and 22 a are provided along the flange portions 22 and 22.
And as shown in FIG. 7, the cheese 1a and the elbow 2a fit the gap 13 of the cheese 1a in the one receiving port 21 of the elbow 2a, and as shown in FIG.6 and FIG.7, the flange part 14 is shown. And the flange portion 22 are substantially in contact with each other.
Arrange the clip body 31 of the fastener clip 3 constituting the remaining part of the connection mechanism separable in a non-rotating state so as to straddle the end of the main pipe 11 of the cheese 1a and the end of the elbow 2a. The clip main body 31 is pushed in the direction of the central axis of the main pipe section 11 starting from two guide sections 31a (shown only on one side in the figure) 31a, and both flange sections 14 and 22 are inside the locking holes 31b. Insert until fitted. In this state, the flange portions 14 and 22 are locked by the inner wall surface of the locking hole 31b, and the cheese 1a and the elbow 2a are connected in a retaining state.
The clip main body 31 is prevented from falling off by being engaged with the engaging portions 32a of the stoppers 32 at the tips of both guide portions 31a.
The clip main body 31 and the stopper 32 are formed by punching and bending a metal material such as a stainless steel plate or engineering plastics.

(5) Due to cutting or the like, the length of the water supply terminal 110 drawn from the dwelling unit wall W is slightly longer than the length that reaches the receiving port 521 that is the connection port of the secondary pipe 520 of the water meter unit 500. Then, the water supply terminal 110 is connected to the one-touch connection part 41 of the one-touch joint (for example, Sekisui Chemical Co., Ltd. product name Eslocatit fastener male adapter) 4a which is a third joint.
In addition, as shown in FIG. 7, when the water supply terminal 110 is inserted to the predetermined position of the one-touch connection part 41, the one-touch connection part 41 will be pressed by the pipe end surface at the diameter expansion piece (not shown) provided inside. The diameter-reducing ring 41a that has been separated and expanded by the diameter-expanding piece is reduced in diameter, and the tube end portion is tightened between the nozzle portion 41b to prevent slippage and water stop.

(6) The difference port 42 of the one-touch joint 4a having the same shape as the above-mentioned difference port 13 is inserted into the receiving port 12a of the branch portion 12 until the flange portion 43 of the one-touch joint 4a substantially contacts the flange portion 14 of the branch portion 12. After being inserted, the one-touch joint 4a is connected to the branch portion 12 of the cheese 1a in a retaining state using the fastener clip 3 in the same manner as described above. That is, the water supply terminal 110 is connected to the branch part 12 of the cheese 1a through the one-touch joint 4a.

(7) As shown in FIG. 7, the hot water supply terminal 210 is connected to the one-touch connection part 41 of the one-touch joint 4 a as the fourth joint of the same type as the water supply terminal 110, and the flange part 43 is connected to the flange part 22. After the insertion port 42 is inserted into the other receiving port 21 of the elbow 2a so as to almost contact, the fastener clip 3 is used to connect the one-touch joint 4a to the elbow 2a in a retaining state in the same manner as described above. That is, the hot water supply terminal 210 is connected to the elbow 2a through the one-touch joint 4a.

(8) An existing screw conversion fastener joint (for example, a trade name fastener female screw nipple manufactured by Sekisui Chemical Co., Ltd.) 5a having a fastener connection mechanism on a male screw cylinder 411 provided at the tip of a hose 410 of an existing water pressure test pump The female screw cylinder portion 51 is screw-connected.
Then, after inserting the insertion port 52 having the same shape as the insertion port 13 into the receiving port 11 of the cheese 1a so that the flange portion 53 substantially contacts the flange portion 14, the fastener clip 3 is used in the same manner as described above. The screw conversion fastener joint 5a is connected to the elbow 2a in a retaining state.
That is, in this state, the water pressure test pump 400, the dwelling unit water supply pipe 100, and the dwelling unit hot water supply pipe 200 are connected to each other through the cheese 1a and the elbow 2a.

(9) Pressurized water is fed into the dwelling unit water supply pipe 100 and the dwelling unit hot water supply pipe 200 using the water pressure test pump 400, and the presence or absence of water leakage from the pipe connection part and equipment in the dwelling unit is examined.

(10) After completion of the water pressure test, the fastener clip 3 is removed, the connection between the screw conversion fastener joint 5a and the cheese 1a is released, and the connection between the cheese 1a and the elbow 2a is released.

(11) As shown in FIG. 3 and FIG. 9, the outlet 13 of the main pipe section 11 is provided in the secondary pipe 520 of the water meter unit 500 with the water supply terminal 110 connected to the branch section 12 of the cheese 1 a. The flange portion 14 and the flange portion 522 are fitted to the receiving port 521, and the fastener clip 3 is attached in the same manner as described above, and the secondary pipe 520 of the cheese 1a and the water meter unit 500 is attached. Fix the connection.

(12) As shown in FIG. 3 and FIG. 9, the terminal of the primary side pipe 810 of the water heater 800 is connected to the one-touch connection portion 41 of the same one-touch joint 4a as described above, and the outlet 42 of the one-touch joint 4a is cheese. The flange portion 14 and the flange portion 43 are fitted to the receiving port 11c of the main pipe portion 11a so that the flange portion 14 and the flange portion 43 are substantially in contact with each other, and the fastener clip 3 is attached in the same manner as described above, and the primary side is connected via the one-touch joint 4a The pipe 810 is connected and fixed to the cheese 1a.

(13) As shown in FIGS. 4 and 10, the terminal of the secondary side pipe 820 of the water heater 800 is connected to the one-touch connection portion 41 of the same one-touch joint 4a as described above with one-touch connection, and the outlet 42 of the one-touch joint 4a is connected. The flange portion 14 and the lunge portion 43 are fitted to the receiving port 21 of the cheese 2a of the elbow 2a so that the flange portion 14 and the lunge portion 43 are substantially in contact with each other, and the fastener clip 3 is attached in the same manner as described above, The pipe 820 is connected and fixed to the elbow 2a.

(14) As shown in FIG. 4, the cinder concrete C is placed between the soils of the meter box MB, and the leg portions 550 of the water meter unit 500 are embedded in the cinder concrete C. Moreover, the drawer hole H of the dwelling unit water supply piping 100 and the dwelling unit hot water supply piping 200 is also embed | buried at this time.

(15) As shown in FIG. 5, after completion of the construction, the temporary pipe 530 of the water meter unit 500 is replaced with a water meter 540.

The steps (6) to (8) may be performed at the same time even if the order is changed.
Further, the steps (11) to (14) may be performed simultaneously even if the order is changed.

  As described above, this piping construction method does not use the dedicated branch joint 300 that has been used at the time of the conventional water pressure test, but the water supply terminal 110 of the cheese 1a and the dwelling water supply pipe 100 and the secondary side of the water meter unit 500. The cheese 1a used to connect the pipe 520 and the primary side pipe 810 of the water heater 800, and the hot water supply terminal 210 of the dwelling unit hot water supply pipe 200 and the secondary side pipe 820 of the water heater 800 are used. Since the water pressure test is performed using the elbow 2a, the branch joint 300 becomes unnecessary, and the construction cost can be reduced.

Moreover, the elbow 2a and the cheese 1a are fastener-connected, that is, the main pipe 11 of the cheese 1a is not rotated around its tube axis, and the elbow 2a and the cheese 1a are connected and disconnected. Since it can be performed, without disconnecting the hot water supply terminal 210 connected to the elbow 2a and the water supply terminal 110 connected to the cheese 1a during the water pressure test, the secondary pipe 520 of the cheese 1a and the water meter unit 500 and While being able to connect with the primary side piping 810 of the water heater 800, the elbow 2a and the secondary side piping 820 of the water heater 800 can be connected.
That is, the number of construction steps can be reduced.

Prior to the water pressure test, the length of the water supply terminal 110 is drawn from the dwelling unit wall surface W in advance so that it is slightly longer than the length that reaches the receiving port 521 of the secondary pipe 520 of the water meter unit 500. Since the adjustment is made, after the water pressure test is completed, the connection between the cheese 1a and the elbow 2a is released, and the water outlet terminal is inserted into the receiving port 521 of the secondary side pipe 520 from above. Even if the lower end of 110 is buried in the cinder concrete C and the degree of freedom is small, it is not necessary to adjust the length of the water supply terminal 110 again.
Therefore, the cheese 1a and the secondary side pipe 520 can be easily connected.

Furthermore, if the construction steps (1) to (7) are performed in parallel in other dwelling units on the same floor, the minimum required number of hydraulic test pumps 400 are prepared on each floor, and the water pressure test is performed. If this is the case, the water pressure test pump 400 can be successively carried to the next dwelling unit and the water pressure test can be carried out quickly and sequentially.
That is, the piping construction can be performed quickly without preparing a large number of water pressure test pumps 400.

  In addition, since the water supply terminal 110 is connected to the cheese 1a and the hot water supply terminal 210 is connected to the elbow 2a via the one-touch joint 4a that can be connected to the fastener, for example, the dwelling water supply pipe 100 or the dwelling water supply pipe 200 is replaced. Even when it is necessary to perform the replacement, the replacement work can be easily performed, and the water pressure test can be performed again without replacing the cheese 1a and the esbo 2a.

FIGS. 11 and 12 show a second embodiment of the pipe construction method of the present invention, which shows the pipe structure at the time of the water pressure test. -
That is, in this piping construction method, as shown in FIG. 11 and FIG. 12, a cheese 1b having a connection mechanism such as Sekisui Chemical Co., Ltd. trade name ESLON PEX header is used as the first joint. As the joint, an elbow 2b having a connection mechanism such as a product name ESLON PEX header of Sekisui Chemical Co., Ltd. is used.

That is, the cheese 1b is a male in which the inside of the cylinder is a receiving port 17a into which a differential port (nipple portion) 61 of both nipple joints 6 described later is fitted to both ends of the main pipe portion 15 and the tip of the branching portion 16. A screw cylinder portion 17 is provided.
The male thread cylinder portion 17 has a double thread structure.

Moreover, the main pipe part 15 and the branch part 16 are each provided with the flange part 18 in the base end part of the said external thread cylinder part 17, as shown in FIG.13 and FIG.14.
The flange portion 18 includes an elliptical flange main body portion 18a and two locking projections 18b provided symmetrically at symmetrical positions.

The locking projection 18b has a locking surface 18c that faces in a direction opposite to the screwing direction (clockwise in FIG. 14) of the male threaded cylinder portion 17 into a cap nut portion 62 of a nipple joint 6 described later. At a position deviated by about 45 degrees from the major axis of the ellipse.
Further, the locking projection 18b gradually moves from the tip of the locking surface 18c (the side far from the center axis of the flange main body 18a) toward the screwing direction of the male screw cylinder 17 (counterclockwise direction in FIG. 14). Is provided with a tapered surface 18d provided so as to approach the flange body 18a and be flush with the flange body 18a at the end.

  As shown in FIG. 12, the elbow 2 b includes a male screw cylinder portion 25 having the same shape as the male screw cylinder portion 17 and a flange portion 26 at both ends.

The cheese 1b and the elbow 2b are connected to the cheese 1b through a nipple joint 6 that forms part of a connection mechanism that can be separated in a non-rotating state without rotating around the tube axis of the main pipe portion 15. Connected and disconnected.
That is, the nipple joint 6 includes a joint body 61 and two cap nut parts 62.

As shown in FIGS. 12 and 13, the joint main body 61 has a nipple shape having a differential opening 63 on both sides.
As shown in FIG. 12, the outlet 63 is sized to fit into the receiving port 17a, and an O-ring 63b is fitted into one annular groove 63a provided in the periphery.

As shown in FIGS. 11 to 13 and 15, the cap nut portion 62 includes a cap nut main body portion 66 and two detent portions 67.
As shown in FIG. 15, the cap nut main body portion 66 includes a female screw cylinder portion 66 a, and is not removable from the joint main body 61 and is rotatable so that the open end of the female screw cylinder portion 66 a faces the tip of the differential port 63. It is attached to.

As shown in FIG. 15, the female screw cylinder portion 66a is provided with two spiral grooves provided with their start ends shifted by 180 degrees on the inner peripheral surface of approximately one pitch (360 degrees). 17 can be screwed into the spiral groove.
The two detents 67 are provided point-symmetrically with the center axis of the cap nut body 66 as the center of symmetry, and include a movable part 67a and an extending part 67b.

The movable portion 67a has an arc shape having an inner diameter slightly larger than the outer peripheral surface of the cap nut main body portion 66, and one end is concentrically formed with the wall surface of the cap nut main body portion 66 and the outer wall surface of the cap nut main body portion 66. It is fixed to become. In addition, the movable portion 67a is fixed when a gap having a substantially uniform width is formed between the outer surface of the cap nut body portion 66 and a force is applied in the radial direction of the cap nut body portion 66 in an unloaded state. It is designed to be elastically deformed in the direction in which force is applied around the part.
The extending portion 67b is provided so as to extend from the open end of the movable portion 67a in parallel with the central axis of the cap nut main body portion 66 and outward from the end edge of the cap nut main body portion 66.

Then, as shown in FIG. 12, the nipple joint 6 has one outlet 63 fitted into one receiving port 17a of the main pipe portion 15 of the cheese 1b, and the cap nut portion 66 is connected to the male screw cylinder portion 17. By tightening, the main pipe portion 15 of the cheese 1b can be connected and fixed to the cheese 1b while keeping the non-rotating state around the pipe axis.
That is, as the cap nut portion 66 is tightened, the female screw tube portion 66a is screwed into the male screw tube portion 17, and the extending portion 67b rotates along the tapered surface 18d, so that the movable portion 67a is moved. When the extending portion 67b gets over the locking projection 18b, the movable portion 67a returns to the tube axis direction due to the elastic restoring force, and the extending portion 67b is brought into contact with the locking surface 18c. The cheese 1b and the nipple joint 6 are connected and fixed.

On the other hand, the nipple joint 6 in the connected state as described above pushes and extends the extending portion 67b outward, while screwing the cap nut portion 66 with the spiral groove of the male screw cylindrical portion 17 and the female screw cylindrical portion 66a. If it rotates to the direction to cancel | release, screwing with the spiral groove of the external thread cylinder part 17 and the internal thread cylinder part 66a can be cancelled | released.
And if it is made to pull out the nipple joint 6 in the pipe-axis direction of the outlet 63 so that it may move away from the receiving port 17a of the cheese 1b after the said cancellation | release, the pipe of the main part 15 of the cheese 1b from the cheese 1b It can be detached while maintaining a non-rotating state around the axis. That is, the cheese 1b does not rotate around the tube axis of the main pipe portion 15.

  In addition, as shown in FIG. 12, the nipple joint 6 has the other outlet 63 fitted into the receiving port 25 a of the elbow 2 b and the other cap nut portion 66 is screwed into the male threaded cylinder portion 25. It can be connected and fixed to the elbow 2b in the same manner as the cheese 1b, and the screw nut 66 is released from the threaded groove of the male screw cylinder part 17 and the female screw cylinder part 66a while pushing the extending part 67b outward. If it rotates in the direction, it can be detached from the elbow 2b.

And in the piping construction method of this embodiment, at the time of water pressure test implementation, as shown in FIG.11 and FIG.12, after connecting the cheese 1b and the elbow 2b via the nipple joint 6, the water supply terminal 110 is 3rd. The hot water terminal 210 is connected to the elbow 2b via the one-touch joint 4b as the fourth joint, and the hose 410 of the hydraulic test pump 400. Is connected to the main pipe portion 15 of the cheese 1b through the screw conversion joint 5b.
That is, the one-touch joint 4 b includes a joint body 45 and a cap nut portion 46 having the same structure as the cap nut portion 66.
The joint body 45 includes a one-touch connecting portion 47 having a structure similar to that of the one-touch joint 4 a and a port 48 having a structure similar to that of the port 63.

Then, after the water supply terminal 110 is connected to the one-touch connecting portion 47, the water outlet terminal 110 is fitted to the receiving port 17a of the branching portion 16, and then the cap nut portion 46 is rotated in the tightening direction. It is connected to the branch part 16 of the cheese 1b through the joint 4b.
The hot water supply terminal 21 is connected to the one-touch connecting portion 47, and after the fitting port 48 is fitted to the other receiving port 25a of the elbow 2b, the cap nut portion 46 is rotated in the tightening direction, thereby the one-touch joint. It is connected to the elbow 2b through 4b.

On the other hand, the screw conversion joint 5 b includes a joint body 55 and a cap nut portion 56 having the same structure as the cap nut portion 66.
The joint body 55 includes a female screw cylinder portion 57 and an outlet 58 having the same structure as the outlet 63.
The hose 410 is inserted into the other receiving port 17a of the main pipe portion 15 of the cheese 1b with the male screw tube portion 411 at the tip thereof screw-connected to the female screw tube portion 57. The bag nut 46 is connected to the cheese 1b by rotating it in the tightening direction.

In this piping construction method, the piping structure shown in FIGS. 11 and 12 is used, and a water pressure test is performed in the same manner as in the first embodiment. After the water pressure test is completed, as shown in FIG. 6 is removed, the connection between the cheese 1b and the elbow 2b is released, and the screw conversion joint 5b is removed from the cheese 1b.
In addition, the male screw cylinder portion 524 provided at the tip of the secondary pipe 520 of the existing water meter unit has a screw conversion joint 5c having the same shape as the above-described screw conversion joint 5b so that the differential 58 side faces upward. Connect to the screw.

Then, after the connection port 17a of the cheese 1b that has been disconnected from the nipple joint 6 as described above is connected to the receiving port 17a of the thread conversion joint 5c, the screw conversion is performed. By rotating the female screw cylinder portion 56 of the joint 5c in the tightening direction and connecting the screw conversion joint 5c and the cheese 1b, the cheese 1b is connected to the secondary pipe of the water meter unit as shown in FIG. The connection is fixed to 520.
Moreover, as shown in FIG. 16, the primary side piping 810 of the water heater 800 is connected and fixed to the receiving port 27a on the side where the connection with the screw conversion joint 5b of the cheese 1b is released, as shown in FIG. The
Further, although not shown, the secondary side pipe 820 of the water heater 800 is connected and fixed to the receiving port 25a to which the nipple joint 6 of the elbow 2b is connected via the one-touch joint 4b.

The construction method according to the present invention is not limited to the above embodiment. For example, in the above embodiment, the water meter unit is fixed at a predetermined position in the meter box before the water pressure test is performed, but the water meter unit may be installed after the water pressure test is performed.
In the above embodiment, the water supply terminal, the hot water supply terminal, the primary side pipe of the water heater and the secondary side pipe of the water heater are each connected to the elbow or cheese via the joint having the one-touch connection part, but the one-touch connection A joint having a caulking connection structure may be used instead of the joint having a portion.

  In the above embodiment, the cheese that is the first joint and the elbow that is the second joint are provided with the connection mechanism that can separate the connection ports in the axial direction in a non-rotating state. When separating the first joint and the second joint, when connecting the first joint and the water meter unit, when connecting the second joint and the secondary pipe of the water heater, and the first A method of separating the water supply terminal from the first joint and then separating the water heater terminal from the second joint after completion of the water pressure test when connecting the joint to the primary pipe of the water heater. As a result, the connection structure between the first joint and the second joint may be a screw connection structure.

1a, 1b cheese (first joint)
11, 15 Main section 12, 16 Branch section 13 Outlet (connection port)
14 Flange (connection mechanism separable in non-rotating state)
17 Male thread cylinder 18 Flange 11c Receiving port (connection port)
2a, 2b Elbow (second joint)
22 Flange (connection mechanism separable in non-rotating state)
25a Reception port (connection port)
3 Fastener clip (connection mechanism separable in non-rotating state)
31 clip body 32 stopper 4a (third joint or fourth joint)
4b (third joint or fourth joint)
43 Flange (connection mechanism separable in non-rotating state)
46 female thread cylinder (connecting mechanism 5a separable in a non-rotating state 5a thread converting fastener joint 5b thread transforming fastener joint 53 flange (connecting mechanism separable in a non-rotating state)
56 Female thread cylinder (connection mechanism separable in non-rotating state)
6 Nipple joint (connection mechanism separable in non-rotating state)
61 Joint body 62 Female thread cylinder (connection mechanism separable in a non-rotating state)
63 Water outlet 100 Dwelling water supply pipe 110 Water supply terminal 200 Dwelling hot water supply pipe 210 Hot water supply terminal 400 Water pressure test pump 500 Water meter unit 520 Secondary side pipe (secondary side pipe of water meter unit)
800 Water heater 810 Primary side piping (Primary side piping of water heater 800)
820 Secondary piping (secondary piping of water heater 800)
MB meter box (outside the house)
W Dwelling unit wall surface

Claims (6)

After carrying out a water pressure test process for supplying pressurized water to the water supply pipe in the dwelling unit and the hot water supply pipe in the dwelling unit through the water supply terminal of the water supply pipe in the dwelling unit drawn out of the dwelling unit and the hot water supply terminal of the dwelling unit hot water supply pipe,
While connecting the water supply terminal and the secondary side pipe of the water meter unit installed outside the dwelling unit and the primary side pipe of the water heater through the first joint,
A piping construction method for connecting the hot water supply terminal and a secondary side pipe of a water heater installed outside a dwelling through a second joint,
A connection port to which the water supply terminal is connected to the first joint, the hot water supply terminal is connected to the second joint, and a secondary side pipe of a water meter unit of the first joint is connected; A connection port to which the secondary pipe of the water heater of the second joint is connected to be separable, and pressurized water is supplied from the connection port connected to the primary pipe of the water heater of the first joint. A piping construction method characterized by carrying out a water pressure test process.   The piping construction method according to claim 1, wherein the first joint and the second joint are provided with a connection mechanism capable of separating the connection ports in the axial direction in a non-rotating state. After pressure test process completed, a first joint, a second joint is separated, in a state of connecting the hot-water supply terminal to the second joint, together with connecting the second joint to the secondary pipe of the water heater , while connected to the water supply terminal to the first joint, the pipe construction method according to claim 2 for connecting the first joint to the secondary pipe of the water meter unit.
  4. The water pressure test according to claim 2 or 3, wherein the length of the water supply terminal from the wall surface of the dwelling unit is set to the connection length of the secondary pipe of the water meter unit installed outside the dwelling unit. Piping method.   The water supply terminal is connected to the first joint via the third joint, and the first joint and the third joint are separable from each other in the axial direction in a non-rotating state. The piping construction method according to any one of claims 1 to 4, comprising a mechanism.   The hot water supply terminal is connected to the second joint through the fourth joint, and the second joint and the fourth joint are separable from each other in the axial direction in a non-rotating state. The pipe construction method according to any one of claims 1 to 5, wherein the joint includes a mechanism.

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