JPH0747859B2 - Piping structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a piping structure constructed by a sheath pipe method.

<Prior art> In indoor piping work, a sheath pipe is arranged along a predetermined piping route during the construction work of a building, and a water pipe (water supply / hot water supply) is installed in the sheath pipe at the time of construction work of the building. , Cold and hot water for cooling and heating, etc.), so-called sheath pipe method may be applied.

Also, for water supply / hot water supply to scattered points, especially for water supply / hot water supply in hotels, buildings or large-scale houses, directly connect water supply / hot water supply pipes to the respective water supply / water supply locations from the water supply or hot water supply header. A header construction method that can guarantee a sufficient amount of water supply / hot water supply may be applied regardless of the distance between the water supply / hot water supply locations even during simultaneous water supply. In particular, this header construction method is a sheath pipe header construction method that uses the sheath pipe construction method. Is being actively adopted.

FIG. 6 shows a conventional piping structure using the sheath pipe header method. In FIG. 6, reference numeral 1'denotes a water supply / hot water supply header. Reference numeral 61 'denotes a water faucet device connection box for connecting a water faucet or other devices, for example, a water faucet box, which is attached to the back surface of the wall panel 51' at each water supply / hot water supply location. Reference numeral 3'denotes a sheath pipe arranged from the header 1'to each box for connecting faucet equipment 61 ', and both ends thereof are raised. On the side of the box 61', its upper end is connected to the bottom of the box 61 '. I am doing it. 4'is each sheath tube 3 '
It is a water pipe inserted in the inside, one end of each water pipe 4'is connected to each branch port 11 'of the header 1', and the other end is each box 6
1 ', and the other end thereof is connected to a curran 63' or a device (for example, a water heater, a heating and cooling device) outside the box through a joint 62 '.

<Problems to be Solved> In the above piping structure, most of the sheath pipe is embedded in the slab, but both ends are arranged on the slab. Thus, after arranging the sheath pipe during the construction work of the building, both ends of the sheath pipe are left on the floor slab surface until the water pipe is drawn in during the facility work in the building. During that time, it often becomes an obstacle to construction. Especially when the water / hot water supply destination is a unit bath, it may be necessary to pass the sheath pipe directly under the waterproof pan of the unit bath.In this case, the length of the sheath pipe part laid on the slab becomes considerably long. ,
The above obstacles are serious.

Therefore, only the slab-embedded sheath pipe portion is arranged at the time of the above-mentioned skeleton construction, and the slab upper sheath pipe portion is laid at the time of the water pipe construction at the time of facility construction, and the slab upper sheath pipe portion thus laid is It is meaningful to connect to the existing slab-buried sheath tube portion.

By the way, in the piping structure by the above-mentioned sheath pipe construction method, even if a water leak occurs in the water pipe, the leak can be received by the sheath pipe, and eventually it can be guided to the rising end portion of the sheath pipe. If the drain pan is attached to the above, the water leak can be treated without any problems, and the interior material of the building can be protected from the water leak.

However, if the connection between the above-mentioned slab-embedded sheath pipe portion and the slab-overlaid sheath pipe portion is performed in the same manner as the connection of a normal pipe / wiring duct, safe water reception by the sheath pipe cannot be guaranteed, and The advantage of the piping structure against the above-mentioned water leakage accident cannot be guaranteed.

An object of the present invention is to facilitate connection between a slab-embedded sheath pipe part and a slab-embedded sheath pipe part while facilitating construction site work while maintaining the water leakage resistance of the pipe structure by the sheath pipe construction method. is there.

<Means for Solving the Problem> The piping structure according to the present invention has a configuration in which the sheath pipe is watertightly connected by a joint in the middle in the pipe formed by inserting the water passage pipe into the sheath pipe. is there.

<Description of Embodiments> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view showing an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a water supply header, which has branch ports 11, ... And is installed in a piping space in a building. Reference numeral 2 denotes a water supply connection pipe, which connects the header 1 and a main pipe (not shown). Reference numeral 3 denotes a sheath pipe, which is composed of a slab burying portion 31 and slab upper laying portions 32 and 33. The slab burying portion 31 is arranged at the time of construction of the building frame, and the slab upper laying portions 32 and 33 are water pipe construction units. It will be installed in equipment work such as bus assembly work. For this sheath pipe, a corrugated plastic pipe in which ring-shaped concave portions and ring-shaped convex portions are alternately provided on the pipe wall can be used.
Reference numeral 41 denotes a connecting portion between the slab-embedded sheath pipe portion 31 and the header-side slab-arranged sheath pipe portion 32, which has a watertight structure. 5
Is a unit bath. Reference numeral 42 denotes a connecting portion between the sheath pipe portion 31 disposed on the slab and the slab-embedded sheath pipe portion 33 on the unit bath side, which has a watertight structure. 61 is a faucet box fixed to the back surface of the wall panel of the unit bath 5.
The slab-arranged sheath pipe portion 33 is erected toward, and the erected end is watertightly connected to the faucet box 61. 7 is sheath tube 3
It is a water pipe that has been drawn inside, and the water pipe end on the header side
70 is erected together with the sheath pipe portion 32, and the upper end of the water pipe end portion 70 is connected to the branch port 11 of the header 1. 8 is a sheath tube part
It is a drain pan attached to the upper end of 32. The end 71 of the water pipe 7 on the bus unit side is housed in a faucet box 61, and a curran 63 is connected to this water pipe end via an elbow joint 62. Reference numeral 64 is a box cover, 65 is a lock nut screwed onto the tip of the joint 62, and 66 is a spacer. By fastening the cap nut 65, the faucet box 61 is fixed to the wall panel 51 of the unit bath 5.

FIG. 2A is an explanatory view showing the structure of the sheath pipe connecting portions 41, 42.

In FIG. 2A, reference numeral 43 denotes a joint main body, which has an annular protrusion 431 at the center of the inner surface of the cylindrical body, and screw grooves 432 are formed at both ends of the outer surface. Reference numerals 30 and 30 denote corrugated sheath tube ends, which are inserted into the joint body 43 until they come into contact with the annular protrusion 431. The inner diameter of the annular protrusion 431 is substantially equal to the inner diameter of the corrugated sheath tube 3. 44 and 45 are elastic packings, which are mounted in a compressed state between the ring-shaped recess of the corrugated sheath tube end 30 and the inner surface of the joint body 43. 46 and 46 are cap nuts screwed to the end of the joint body, and 47 is a retainer housed in the cap nut, and is a tapered C-shaped ring (front view in FIG. 2B, FIG. 2C).
2B) is used to press the taper C-shaped ring 47 against the inner peripheral edge 433 of the end face of the joint body by tightening the cap nut 46, and the radial direction at the press-contacted portion. The ring 47 is reduced in diameter by a component force and is retained in the ring-shaped groove of the corrugated sheath tube end 30.

In FIG. 2A, it is preferable that, of the packings 44, 45 mounted on each corrugated sheath tube end 30, the hardness of the inner packing 44 is higher than the hardness of the other packing 45.
Thus, the back end of the sheath tube end portion 30 can be stably supported on the joint body 43 by the high hardness packing 44.
Since the taper C-shaped ring 47 sandwiching 44 and the soft packing 45 supports the sheath tube on the joint body 43 over the entire circumference, when the moment acts on the sheath tube, the sheath tube has a certain degree of rigidity so that the joint body has some rigidity. Hard packing 44 even if you try to lean inside
Due to the stable two-point support state between the taper C-shaped ring 47 and the taper C-shaped ring 47, the inclination can be well prevented. Therefore, the thickness of the gap between the joint body 43 and the corrugated sheath tube end 30 can always be kept constant, and the sealability of the packings 44, 45, especially the soft packing 45, can be well ensured. In order to assemble the connection part shown in FIG. 2A, after inserting the cap nut 46 into each corrugated sheath tube, the tapered C-shaped ring 47 is provided with a ring-shaped recess at a predetermined position (usually 3 to 5 from the corrugated sheath tube tip).
The soft packing 45 and the hard packing 44 are fitted into the ring-shaped recesses (usually the first and third to fourth ring-shaped recesses) at predetermined positions, respectively, and then the packing etc. The corrugated sheath pipe may be press-fitted into the joint body 43 so that the tip of the sheath pipe is brought into contact with the annular protrusion 431 of the joint body 43, and then the cap nut 46 may be tightened.

FIG. 3A shows another example of the sheath pipe connection structure used in the present invention, in which the corrugated sheath pipe ends 30, 30 are provided with a hard packing 44, a soft packing 45, and FIGS. 3A and 3C (see FIG. Figure 3B
C-rings 47 shown in C-C cross-section) are mounted at respective predetermined positions, and then the ends of the sheathed corrugated sheath tubes with packing or the like are packed into the joint body 43 and the C-shaped locking rings. Pressed against the elastic force of 47, each C type locking ring 47
, Are fitted into the respective holes 433, ... At the end of the joint body.

FIG. 4A is an explanatory view showing another example of the sheath pipe connection structure used in the present invention, and FIG. 4B is bb in FIG. 4A.
In the cross-sectional view, the left and right slits 444, at a predetermined interval (usually one peak of the wave of the corrugated sheath tube), at each end of the joint body 43,
444 and upper and lower slits 445, 445 are perforated in different directions by 90 °, and each corrugated sheath tube end portion 30 equipped with the hard packing 44 and the soft packing 45 is press-fitted into the joint body 43, and the above-mentioned upper and lower slits 444, 444 and U-shaped clasps 47, 47 are attached to 445, 445, and both U-shaped sides of each clasp 47 are locked in the ring-shaped recess of the corrugated sheath tube. In this case, since the corrugated sheath tube end is supported from all sides by the fasteners 47, 47 on the joint body 43, the support state of the corrugated sheath tube end by the fastener is stable in this case as well. .

In the above, the fitting body 43 is made of vinyl chloride, polypropylene, polyethylene, polycarbonate, etc.
Metals such as brass and stainless steel, hard plastics such as polycarbonate and ERP can be used for each. O-rings, for example, can be used for the packings 44 and 45.
Any hollow can be used, and as the material, not only rubber but also plastic having excellent elasticity can be used.

A watertight connection is also used to connect the faucet box (made of plastic such as vinyl chloride) and the sheath pipe. In FIG. 1, between the sheath pipe insertion tube portion 611 and the sheath pipe 3 of the faucet box 61. May be connected in the same manner as in FIGS. 2A, 3A and 4A. FIG. 5 shows the sheath pipe insertion tube portion 61 of the water faucet box 61.
An example of a watertight connection structure between 1 and the sheath tube 3 is shown, 44 is a hard packing, 45 is a soft packing, and 47, 47 are fasteners.

<Effects of the Invention> The piping structure according to the present invention has the configuration as described above,
Even if the sheath pipe is connected in the middle, the connecting part has a watertight structure by packing, so even if a water leak occurs in the water pipe in the sheath pipe, the leak is received by the sheath pipe and the rising sheath The leak can be led to the pipe end, and the leak can be treated without damaging the interior material of the building with a drain pan or the like. Moreover, since the sheath pipe is connected using the joint, the sheath pipe can be connected at a desired position and length. Furthermore, only the slab-embedded sheath tube portion can be placed during the construction work of the building, and the sheath tube portion laid over the slab can be placed during equipment work such as water pipe construction. After that, until the equipment construction, it is possible to smoothly proceed with the construction work in which obstacles on the floor slab are well removed.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention, FIG. 2A is a longitudinal sectional view showing an example of a sheath pipe connecting portion used in the present invention, and FIG. 2B is a retainer in FIG. 2A. Front view,
2C is a cross-sectional view taken along the line CC of FIG. 2A, FIG. 3A is a cross-sectional view showing another example of the sheath pipe connecting portion used in the present invention, and FIG. 3B is shown in FIG. 3A. The front view which shows an anchor, FIG. 3C is sectional drawing in the CC line | wire of FIG. 3B, FIG. 4A is a partial cross section which shows another example of the sheath pipe connection part used in this invention. 4B is a cross-sectional view taken along line bb in FIG. 4A, and FIG. 5 is a cross-sectional view showing an example of a connecting portion between the faucet box and the sheath pipe used in the present invention. FIG. 6 is an explanatory view showing a conventional example. 3 ... Sheath pipe, 31 ... Slab buried sheath pipe part, 32, 33 ... Slab arrangement sheath pipe part, 4 ... Water pipe, 43 ... Joint body, 44 ...
… Hard packing, 45 …… soft packing, 47 …… stop fastener.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor ▲ Takahashi Ryuji Takahashi 1-2-7 Moto Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Masaharu Yata Shinei-cho, Naka-ku, Nagoya-shi, Aichi 2-14 Kashima Construction Co., Ltd., Nagoya Branch (72) Inventor Hisao Kondo 2-14 Shineicho, Naka-ku, Nagoya, Aichi Prefecture 2-14 Kashima Construction Co., Ltd., Nagoya Branch (72) Inventor ▲ Taka ▼ Noriaki Aichi Nagoya 2-14 Shin-eicho, Naka-ku, Kashima Construction Co., Ltd., Nagoya Branch (72) Inventor Hozu, Hirohiro 3-135, 1-107, Moritaka, Moriyama-ku, Nagoya-shi, Aichi Prefecture Inventor Shigeru Ando Moriyama-shi, Shiga Prefecture 82 280 Harimatacho (72) Inventor Akihiko Sato 214 Hachiya, Ritto-cho, Kurita-gun, Shiga Prefecture (72) Inventor Kuniaki Onishi 2-11-30 Nishishibukawa, Kusatsu City, Shiga Prefecture Reference 56 -69891 (JP, A)

Claims (4)

[Claims] 1. A pipe structure in which a water pipe is inserted into a sheath pipe, wherein the sheath pipe is connected in a watertight manner by a joint midway. 2. A pipe in which a water pipe is inserted into a sheath pipe having slab upper laid portions on both sides of the slab buried portion, wherein the sheath pipe is between the slab embedded sheath pipe portion and each slab upper laid sheath pipe portion. Piping structure characterized by being watertightly connected by a joint. 3. The corrugated pipe according to claim 1 or 2, wherein a corrugated pipe having ring-shaped concave portions and ring-shaped convex portions alternately formed on the pipe wall is used as the sheath pipe. For such connection, each corrugated sheath tube end is inserted into each of both ends of the joint body, and several packings are mounted between the ring-shaped recess of each corrugated sheath tube end and the joint body. A piping structure characterized in that a connecting structure is used at both ends of the joint body, in which fasteners that engage with the ring-shaped recesses of the corrugated sheath pipe end are attached. 4. The packing according to claim 3, wherein there are two packings mounted between the ring-shaped recess at each corrugated sheath tube end and the joint body, and the inner packing of these packings is the other packing. A pipe structure having a hardness higher than that of the present invention, and the clasp is configured to support each corrugated sheath tube end portion on the joint main body over the entire circumference or at least four sides.