JP2006225989A - Back piping implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a back piping implement which can eliminate a need for processing upon each construction work and can be installed easily in a narrower space. <P>SOLUTION: A faucet connecting metal piece 20 for connecting a crank pipe 18 for fitting a faucet, and a water supplying pipe connecting metal piece 21 for connecting a water supplying pipe 16 are connected to each other by a connecting pipe 22 made of a flexible synthetic resin. The connecting metal pieces 20, 21 are respectively provided with connecting cylindrical parts 29, 42 for externally fitting end parts of the connecting pipe 22, and a plurality of protruding linear parts 30 are provided on the outer peripheries. The end parts of the connecting pipe 22 are externally fitted to the connecting cylindrical parts 29, 42, respectively, and sleeves 31 are externally fitted further to the outer peripheries and are tightened up. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a back piping device for supplying water or hot water to a faucet of a bathroom, a wash basin, a sink, a toilet or the like.

  Conventionally, for example, an assembly bathroom (unit bath) is constructed by assembling members such as a waterproof pan, a bathtub, a wall, and a ceiling, and a hot water / water mixing faucet, for example, is installed on the inner surface (inside the bathroom) of the waterproof pan. . The hot / cold water faucet is connected and supported via a crank pipe to a pair of faucet connection fittings arranged on the back side (outside the bathroom) of the side wall. Furthermore, a water supply pipe connected to the water pipe is connected to one of the water faucet connection fittings, and a hot water supply pipe connected to the water heater is connected to the other. At this time, one water faucet connection metal fitting and the water supply pipe, and the other water faucet connection metal fitting and the hot water supply pipe are connected to each other via a back piping.

  Conventionally, a copper pipe has been generally used as the back pipe. When manufacturing the back pipe with copper pipe, cut the copper pipe at the construction site according to the positional relationship between the position of the end of the already installed water supply pipe or hot water pipe and the planned installation position of the pair of faucet connection fittings And it was bent. Therefore, it is necessary to manufacture a dedicated back pipe for each construction, and the installation cost is high due to the labor cost. Also, since the installation position of the hot and cold water mixing faucet varies depending on the size and variation of the bathroom, the dimensions of the manufactured back piping often do not match the actual installation position. Further, the back pipe made of a copper pipe cannot absorb errors because the copper pipe is not flexible. For this reason, the manufactured back piping may not be actually installed.

In order to solve such a problem, for example, back piping as disclosed in Patent Documents 1 to 4 has also been proposed. In this back pipe, a water faucet connection joint (corresponding to a water pipe connection fitting) installed on the back side of the side wall portion of the waterproof pan and the end of the water pipe are connected by a flexible synthetic resin pipe. Further, the water faucet connection joint includes a push-lock type connection portion, and an end portion of the synthetic resin pipe into which the support sleeve is inserted is connected to the connection portion with one touch. Therefore, according to this back piping, a synthetic resin pipe having a predetermined length is prepared in advance, and is appropriately selected according to the bathroom under construction, so that processing at each construction site becomes unnecessary. The push-lock type connecting portion is a well-known mechanism including a grab ring, a synthetic resin washer, and an O-ring.
JP-A-8-260529 (pages 1 to 4, FIGS. 1 to 3) JP-A-8-260530 (pages 1 to 4, FIGS. 1 to 3) JP-A-8-260531 (pages 1 to 4, FIGS. 1 and 2) JP-A-8-302765 (1st page to 5th page, FIG. 2 and 7 to 9)

  By the way, since the clearance gap between the outer surface of the side wall part of the waterproofing pan of an assembly-type bathroom and the inner wall of the house where this bathroom is installed is usually small, a faucet connection joint is often installed in a narrow space. On the other hand, the faucet connection joint of the above-mentioned back pipe is provided with a complicated push-lock type connection portion, and therefore has a larger diameter than the connection portion when a conventional copper pipe is used. For this reason, the back piping of each of the above-mentioned patent documents has a problem of poor installation in a narrow space.

  Moreover, the connection between the synthetic resin pipe and the faucet connection joint at the construction site requires specialized knowledge and skills, and can only be performed by a qualified piping company, and is poor in workability. there were.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose of the invention is to provide a back piping device that can eliminate the processing for each construction and can be easily installed in a narrower space.

  In order to achieve the above object, according to the first aspect of the present invention, a faucet connection fitting to which a faucet is connected and a water supply pipe connection fitting to which an external water supply pipe is connected are connected by a connecting pipe. It is a back piping device, and the connecting pipe is made of a synthetic resin having flexibility, and each connecting fitting is provided with a connecting tube portion to which an end of the connecting tube is fitted, and the connecting tube An engaging portion is provided on the outer peripheral surface of each portion, and an end portion of the connection pipe is externally fitted to a connection cylinder portion of each connection fitting, and a sleeve is further externally fitted to the outer periphery of the connection pipe and tightened. And

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, a heat insulating material is wound around the connecting pipe, and an end portion of the heat insulating material and the sleeve are covered with a covering tube. .

  According to a third aspect of the present invention, in the invention according to the first or second aspect of the present invention, a crank pipe interposed between the faucet and the faucet connecting bracket is integrated. Features.

(Function)
According to the first aspect of the present invention, the water faucet connection fitting to which the water faucet is connected and the water supply pipe connection fitting to which the external water supply pipe is connected are made of a flexible synthetic resin. Connected by. Then, each connection fitting and each end of the connection pipe are connected by a simple and reliable connection method in which the end of the connection pipe is fitted on each connection fitting and the sleeve is further fitted on the outer periphery thereof. . Accordingly, the positional relationship between the faucet connection fitting and the water supply pipe connection fitting can be freely changed to some extent, and the maximum outer diameter of the connection portion between each connection fitting and the end of the connecting pipe is further reduced.

  According to invention of Claim 2, the temperature change of the water or hot water which passes a connecting pipe is suppressed by the heat insulating material wound around the connecting pipe. The heat insulating material contracts in the length direction of the connecting pipe as the temperature decreases. At this time, the heat-shrinkable tube that covers the end portion of the heat insulating material and the sleeve covers and conceals the gap generated between the end portion of the heat insulating material and the sleeve from the outside. For this reason, even if a heat insulating material shrinks, a feeling of quality does not fall.

  According to invention of Claim 3, since the crank pipe is integrated with the faucet connection metal fitting, the work man-hour at a construction site can be reduced.

  According to the present invention, since the sleeve is further fitted on the outer periphery of the end of the connecting pipe that is fitted on the connecting tube of the water faucet fitting and the water supply pipe fitting, the conventional push lock type connecting portion is used. In comparison, the maximum diameter of the connecting portion becomes smaller. For this reason, the process for every construction can be made unnecessary, and it can be installed in a narrower space.

(First embodiment)
Next, a first embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIGS. 2 and 3, the back piping tool 10 of this embodiment is installed on the back side of the side wall 13 on the washing place side in the assembly bathroom 11. And the back piping tool 10 connects the water supply pipe 16 and the hot water supply pipe 17 installed in the lower side of the floor part 15 to the mixing faucet 14 provided in the side wall part 13. The back piping 10 is installed between the mixing faucet 14 and the water supply pipe 16 and between the mixing faucet 14 and the hot water supply pipe 17. A crank pipe 18 is interposed between the mixing faucet 14 and each back piping 10. In this embodiment, the mixing faucet 14 and both crank pipes 18 constitute a faucet. In addition, the back piping tool 10 of this embodiment can also connect the mixing faucet 14 provided in the side wall part 13 on the bathtub side, the water supply pipe 16 and the hot water supply pipe 17. Moreover, the single water tap provided in the side wall part 13 of the washing place side or the bathtub side and the water supply pipe 16 can also be connected.

  As shown in FIGS. 4 and 5, each back piping tool 10 includes a faucet connector 20 fixed to the side wall portion 13 on the upper side of the floor portion 15, and a lower side of the floor portion 15 with respect to the side wall portion 13. It is comprised from the water supply pipe connection metal fitting 21 fixed by (3), and the connecting pipe 22 which connects the water tap connection metal fitting 20 and the water supply pipe connection metal fitting 21. FIG. The connecting tube 22 is made of a synthetic resin having flexibility.

  As shown in FIGS. 1 and 4, the faucet connection fitting 20 includes a faucet connection portion 23 inserted into the bathroom side through a through hole 13 a provided in the side wall portion 13, and a base end of the faucet connection portion 23. A connecting pipe connecting portion 24 extending downward from the side is provided, and a flange portion 25 is provided between the faucet connecting portion 23 and the connecting pipe connecting portion 24. The faucet connection fitting 20 is attached to the side wall portion 13 by sandwiching the side wall portion 13 between the fastening ring 26 screwed into the external thread portion 23 a on the outer peripheral surface of the faucet connection portion 23 and the flange portion 25. It is fixed. A packing 27 is interposed between the tightening ring 26 and the side wall portion 13.

  Inside the faucet connection portion 23, there is provided a female screw portion 28 that opens into the bathroom and forms a water channel, and a male screw portion 18a of the crank tube 18 is screwed into the female screw portion 28. Thereby, the faucet connection fitting 20 and the crank tube 18 are connected and the water channels of both are connected.

  The connecting tube connecting portion 24 is provided with a connecting tube portion 29 that forms a water channel 29a connected to the female screw portion 28 of the faucet connecting portion 23, and an end portion of the connecting tube 22 is externally fitted to the connecting tube portion 29. Yes. On the outer peripheral surface of the connecting tube portion 29, a plurality of ridge portions 30 are provided as engaging portions extending in the circumferential direction. The connecting tube portion 29 is fitted with the end portion of the connecting pipe 22 and the sleeve 31 is further fitted on the outer periphery thereof. As a result, the end portion of the connecting pipe 22 is connected to the connecting tube portion 29 of the connecting pipe connecting portion 24, and the two water channels are connected to each other. Further, a cover means having an inner diameter larger than the inner diameter of the sleeve 31 and an escape ring 32 as an annular body are fitted on the proximal end side of the connecting cylinder portion 29. The escape ring 32 is sandwiched between a step surface 33 provided at the proximal end of the connection cylinder portion 29 and the end surface of the sleeve 31. Then, the surplus portion 34 generated on the distal end side (the upper end side in FIG. 1) of the end portion of the connecting tube 22 is fastened to the outer peripheral surface of the connection tube portion 29 by the escape ring 32 fitted on the connection tube portion 29. It is also hidden from the outside.

  As shown in FIGS. 1 and 4, the water supply pipe connection fitting 21 includes a water supply pipe connection part 35 inserted into the lower space of the floor part 15 from the through hole 13 b of the side wall part 13, and the water supply pipe connection part 35. And a connecting pipe connecting portion 36 extending upward from the base end side, and a flange portion 37 is provided between the water supply pipe connecting portion 35 and the connecting pipe connecting portion 36. The water supply pipe connection fitting 21 is attached to the side wall part 13 by sandwiching the side wall part 13 between the tightening nut 38 screwed into the male thread part 35 a on the outer peripheral surface of the water supply pipe connection part 35 and the flange part 37. It is fixed. A packing 39 is interposed between the tightening nut 38 and the side wall portion 13.

  The water supply pipe connecting portion 35 is provided with a water channel 35 b that opens to the lower side of the floor portion 15. Then, a tightening nut 40 is screwed into the male thread portion 35a of the water supply pipe connecting portion 35, and the end face of the water supply pipe 16 is pressed against the end face side of the water supply pipe connecting portion 35 via the packing 41 by the tightening nut 40. ing. Thereby, the water supply pipe 16 is connected to the water supply pipe connection part 35, and both water channels are connected.

  The connecting pipe connecting portion 36 has the same configuration as that of the connecting pipe connecting portion 24 of the faucet connecting metal fitting 20, and the lower end portion of the connecting pipe 22 is connected to the connecting tube portion 42 (corresponding to the connecting tube portion 29). The sleeve 31 is further fitted on the outer periphery thereof. Thereby, the lower end part of the connection pipe 22 is connected to the connection pipe connection part 36 of the water supply pipe connection fitting 21, and both the water channels are connected to each other. Further, the escape ring 32 is fitted on the proximal end side of the connection cylinder portion 42, and the excess portion 34 generated on the distal end side (lower end side in FIG. 1) of the end portion of the connecting pipe 22 by the escape ring 32. Is fastened to the outer peripheral surface of the connecting tube portion 42 and is covered and hidden from the outside.

  The connecting pipe 22 is a cross-linked polyethylene pipe or a polybutene pipe defined by Japanese Industrial Standards. A heat insulating material 43 made of, for example, urethane foam is wound around the connecting pipe 22. Each end portion of the heat insulating material 43 and the sleeve 31 are formed between the end portion of the heat insulating material 43 and the sleeve 31 when the heat insulating material 43 contracts in the length direction of the connecting tube 22 as the temperature decreases. A heat shrinkable tube 44 is covered as a covering tube for covering the gap from the outside.

Next, a manufacturing method of the present embodiment configured as described above will be described. Here, a method for manufacturing the back piping device 10 in a factory will be described.
First, the connecting pipe 22 having an inner diameter smaller than the outer diameter of each of the connecting pipe connecting portions 24 and 36 of the faucet connecting metal fitting 20 or the water supply pipe connecting metal fitting 21 is cut into a predetermined length. Two sleeves 31 and two escape rings 32 are fitted. At this time, the inner diameter of the sleeve 31 is slightly larger than the outer diameter of the connecting pipe 22, and the sleeve 31 can move relative to the connecting pipe 22 in the length direction. Next, as shown in FIG. 6 (a), each end portion of the connecting pipe 22 is expanded to such an extent that it can be externally fitted to the connecting pipe connecting portions 24 and 36 of the faucet connecting fitting 20 or the water supply pipe connecting fitting 21. Let

  Next, the end portions of the connecting pipe 22 are fitted on the connecting tube portions 29 and 42 of the connecting pipe connecting portions 24 and 36, respectively. At this time, the end portion of the connecting pipe 22 is fitted onto the connecting tube portions 29 and 42 until the end surface of the connecting tube 22 contacts the stepped surface 33 of the connecting tube portions 29 and 42. Next, the sleeve 31 is moved together with the relief ring 32 to the connection tube portions 29 and 42 side, and the sleeve 31 is further fitted onto the outer periphery of the end portion of the connecting tube 22 that is fitted onto the connection tube portions 29 and 42. At this time, the sleeve 31 and the escape ring 32 are forcibly moved to the base end side of the connecting tube portions 29 and 42 until the end face of the escape ring 32 contacts the stepped surface 33. As a result, the end portion of the connecting tube 22 that is externally fitted to the connection tube portions 29 and 42 is tightened between the outer peripheral surface of the connection tube portions 29 and 42 and the inner peripheral surface of the sleeve 31. Then, the protrusions 30 of the connecting tube portions 29 and 42 bite into the inner peripheral surface of the end portion of the connecting tube 22, and the end portions of the connecting tube 22 are mechanically connected to the connecting tube portions 29 and 42. At this time, a surplus portion 34 is generated on the distal end side of the end portion of the connecting pipe 22 due to the end portion being compressed by the sleeve 31. The surplus portion 34 is pressed against the outer peripheral surfaces of the connecting tube portions 29 and 42 by the inner peripheral surface of the escape ring 32 having a larger inner diameter than the sleeve 31 and is covered and hidden from the outside.

  Finally, after the heat insulating material 43 is wound around the outer peripheral surface of the connecting tube 22, each end of the heat insulating material 43 and the sleeve 31 are covered with a heat shrinkable tube 44. Then, the heat shrinkable tube 44 is heated and brought into close contact with the heat insulating material 43 and each sleeve 31.

  The back piping tool 10 of this embodiment configured as described above is installed between the outer surface of the side wall 13 of the assembly-type bathroom 11 and the inner wall of the house where the assembly-type bathroom 11 is installed. In this back piping tool 10, the end portions of the connecting pipe 22 are connected to the connecting tube portions 29 and 42 of the connection fittings 20 and 21 by a simple and reliable method in which the sleeve 31 is tightened. For this reason, the maximum outer diameter of each connection portion between each of the connection fittings 20 and 21 and the connecting pipe 22 is smaller than the maximum outer diameter of the push-lock type connection portion of the prior art. Therefore, this back piping tool 10 can be easily installed also in a narrow gap between the outer surface of the side wall 13 of the assembled bathroom 11 and the inner wall of the house where the assembled bathroom 11 is installed. In the state where the back piping 10 is installed, as shown in FIG. 4, the sleeve 31 and the escape ring 32 are in contact with the outer surface of the side wall portion 13, and the side portion 13 side portion of the heat insulating material 43 is crushed. It is in a state.

  Moreover, according to this embodiment, since the faucet connecting fitting 20 and the water supply pipe connecting fitting 21 are connected by the flexible connecting pipe 22, the faucet connection is different from the conventional copper pipe. Even if there is some variation in the positional relationship between the installation position of the metal fitting 20 and the installation position of the water supply pipe connection metal fitting 21, it can be easily installed. That is, unlike the conventional copper pipe, it is necessary to cut the connecting pipe 22 according to the size of the assembled bathroom 11, the position of the faucet in the bathroom 11, and the installation position of the water supply pipe 16 and the hot water supply pipe 17. There is no. Instead, a plurality of back piping fixtures 10 having different lengths of the connecting pipes 22 are prepared in advance, and depending on the positional relationship between the installation positions of the connection fittings 20 and 21 and the installation positions of the water supply pipe 16 and the hot water supply pipe 17. The back piping tool 10 having an appropriate length may be selected. Therefore, processing for each construction is unnecessary, and the manufacturing cost of the back piping tool 10 can be reduced.

  Further, a relief ring 32 is fitted to the distal end side of the end portion of the connecting pipe 22, and the surplus portion 34 generated on the distal end side of the end portion due to the outer fit of the sleeve 31 is removed by the relief ring 32 to connect the connecting cylinder portion 29, It was pressed against the outer peripheral surface of 42 and covered from the outside. For this reason, since the surplus part 34 produced at the end of the connecting pipe 22 is not visible from the outside, the quality is improved.

  Further, since each end portion of the heat insulating material 43 and the sleeve 31 are covered with the heat shrinkable tube 44 from the outside, the heat insulating material 43 contracts when the temperature in winter is low, and a gap is formed between the end portion and the sleeve 31. Even if you can, the gap is not visible from the outside. For this reason, a feeling of quality can be improved further.

(Second Embodiment)
Next, a second embodiment embodying the present invention will be described with reference to FIGS. In this embodiment, only the faucet connection fitting 50 in which the crank pipe 18 is integrated with the faucet connection fitting 20 is provided in place of the faucet connection fitting 20 of the back piping member 10 of the first embodiment. However, only the faucet connection fitting 50 will be described in detail.

  As shown in FIG. 8, the faucet connection fitting 50 of this embodiment includes a faucet connection part 51 inserted through the through hole 13a, a crank part 52 as a crank tube to which the mixed faucet 14 is connected, And a connecting pipe connecting portion 24 extending downward from the base end side of the plug connecting portion 51. A water passage is provided in the faucet connection portion 51, and a known flow rate adjustment valve 53 that is adjusted on the crank portion 52 side is disposed in the water passage.

  Unlike the first embodiment, in order to install the back piping device 10 configured as described above on the side wall portion 13 of the assembly-type bathroom 11, the faucet connection fitting 50 in a state where the connecting pipe 22 is not connected is provided on the side wall portion. 13 is inserted through the through-hole 13a from the inner surface (bathroom side). Next, the upper end part of the connecting pipe 22 is connected to the connecting tube part 29 of the connecting pipe connecting part 24 that has come out of the side wall part 13 in the same manner as in the first embodiment. The water supply pipe connection fitting 21 is inserted into the through hole 13b from the outer surface side of the side wall part 13 and fixed to the side wall part 13 with the connecting pipe 22 being connected.

  Next, as shown in FIG. 9, a pair of substantially cylindrical packings 54 a and 54 b that are halved are fitted from above and below into a portion that protrudes from the through hole 13 a to the bathroom side in the faucet connection portion 51. The packings 54a and 54b are composed of trunk portions 55a and 55b that are externally fitted to the faucet connection portion 51, and flanges 56a and 56b provided at the ends of the trunk portions 55a and 55b. Next, the body portions 55a and 55b of the packings 54a and 54b are pushed into the through hole 13a.

  Next, a pair of substantially disc-shaped washers 57a and 57b divided in half are fitted from the top and bottom to the protruding portion of the faucet connection portion 51. And both packings 54a and 54b and both washers 57a and 57b are fixed to the side wall part 13 with screws 58a and 58b. Finally, the flange 59 that has been externally fitted to the faucet connecting portion 51 is moved to a position where it abuts against the washers 57a and 57b, and the screws 58a and 58b are covered with the flange 59 from the outside.

  This embodiment configured as described above also has the same effect as the first embodiment, and the crank portion 52 is integrated with the faucet connection fitting 50, so that the number of work steps at the construction site is reduced. can do.

(Modification)
In addition, this embodiment can also be changed and embodied as follows.
As shown in FIGS. 7A and 7B, the annular portion 60 corresponding to the escape ring 32 is integrally provided on the base end side of the connecting tube portions 29 and 42. Then, the sleeve 31 externally fitted to the connection tube portions 29 and 42 is moved to the proximal end side of the connection tube portions 29 and 42 until the end surface of the sleeve 31 comes into contact with the end surface of the annular portion 60. At this time, the surplus portion 34 generated on the distal end side of the end portion of the connecting tube 22 by fitting the sleeve 31 is inserted into the circumferential groove 61 between the annular portion 60 and the outer peripheral surfaces of the connecting tube portions 29 and 42. To house. At this time, the surplus portion 34 may not fill the circumferential groove 61.

A configuration in which the escape ring 32 is integrated with the sleeve 31 may be adopted.
-As an engaging part, it is good also as a structure which provided the circumferential groove replaced with the protrusion part 30 in the outer peripheral surface of each connection cylinder part 29 and 42. As shown in FIG.

As the covering tube, instead of the heat shrinkable tube 44, a tube made of vinyl chloride that expands by heating and shrinks when returning to room temperature may be used.
-You may embody this invention in the back piping fixture for supplying water to a bathroom, a sink, a sink, and a toilet faucet built in a house.

The longitudinal cross-sectional view which shows the back piping tool of 1st Embodiment. The perspective view which shows the back piping fixture installed in the assembly-type bathroom. The perspective view which similarly shows a back piping tool. The partial longitudinal cross-sectional view which shows the back piping tool to which the faucet and the water supply pipe were connected. The perspective view which shows a back piping tool. (A) is a longitudinal cross-sectional view which shows the principal part of the back piping tool at the time of manufacture, (b) is a longitudinal cross-sectional view which similarly shows the principal part of a back piping tool. (A), (b) is a longitudinal cross-sectional view which shows the modification of a connection structure with the connection pipe of a connection cylinder part. The longitudinal cross-sectional view which shows the back piping tool of 2nd Embodiment. Similarly disassembled perspective view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Back piping tool, 14 ... Mixing faucet which comprises water faucet, 16 ... Water supply pipe, 17 ... Hot water supply pipe, 18 ... Crank pipe which comprises water faucet, 20 ... Water faucet connection metal fitting, 21 ... Water supply pipe connection metal fitting , 22 ... connecting pipe, 29 ... connecting cylinder part, 30 ... ridge part as engaging part, 31 ... sleeve, 42 ... connecting cylinder part, 43 ... heat insulating material, 44 ... heat shrinkable tube as a covering tube, 50 ... faucet connector, 52 ... crank part as a crank tube.

Claims (3)

A back plumbing fixture in which a faucet connection fitting to which a faucet is connected and a water supply pipe connection fitting to which a water supply pipe from outside is connected by a connecting pipe,
The connecting pipe is made of flexible synthetic resin,
Each of the connection fittings is provided with a connection cylinder part to which an end of the connecting pipe is fitted,
An engaging part is provided on the outer peripheral surface of the connecting cylinder part,
A back piping device, wherein an end portion of the connection pipe is externally fitted to a connection cylinder portion of each connection fitting, and a sleeve is further externally fitted to the outer periphery of the connection pipe and tightened.   The back piping device according to claim 1, wherein a heat insulating material is wound around the connecting pipe, and an end portion of the heat insulating material and the sleeve are covered with a covering tube.   The back piping tool according to claim 1 or 2, wherein a crank pipe interposed between the water faucet connection fitting and the water faucet is integrated.

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