JP2006348659A - Routing structure of hot water supply piping for bathtub in prefabricated bath, and waterproof sleeve for use in the routing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a routing structure of hot water supply piping, dispensing with bisecting heat resistant pipes for hot water supply and an outer pipe at a wall part of a waterproof pan to carry out piping construction well, and eliminating a possibility of water leakage from a waterproof pan to the outside. <P>SOLUTION: A piping through-hole 8 is formed in a bottom wall part 13a of the waterproof pan 1 to distribute the heat resistant pipes 6, 6 inserted through the outer pipe 5 and extended from the water heater 3 side, up to the bathtub 2 side. A waterproof sleeve 7 for holding liquid-tightness between the outer peripheral surface of the outer pipe 5 and the inner peripheral surface of the through-hole 8 in the inserted state of the outer pipe 5 is mounted in the through-hole 8, and the waterproof sleeve 7 is provided with a cylindrical elastic bushing 76 for holding liquid-tightness between the outer peripheral surface of the outer pipe 5 and the waterproof sleeve 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hot water pipe piping structure and a waterproof sleeve used for hot water pipes, which are applied to installation work of a unit bath in which a washing area and a bathtub recess are integrally formed on a waterproof pan.

  In general, when installing a unit bath, in order to supply hot water from a water heater outside the waterproof pan to the bathtub installed inside the waterproof pan, a pair of heat-resistant pipes for hot water supply inserted into the outer tube, Piping is routed from the hot water supply side to the circulation adapter of the bathtub.

  In this type of conventional piping routing structure, the heat-resistant pipe is divided into an outer routing portion of the waterproof pan and an outer routing portion of the waterproof pan, and both are connected by the sidewall of the waterproof pan. This technique is known (for example, see Patent Document 1).

  The specific configuration will be described with reference to FIGS.

  In FIG. 5, a bathtub 102 is installed inside the waterproof pan 101, and a water heater 103 is installed outside the waterproof pan 101.

  Reference numerals 104 and 104 denote a pair of internal heat-resistant pipes that are inserted into an inner exterior pipe 105 called a sheath pipe and are routed inside the side wall portion 101a of the waterproof pan 101, and 106 and 106 are external exterior pipes. 107 is a pair of external heat-resistant tubes that are inserted into 107 and routed outside the side wall portion 101a of the waterproof pan 101.

  As shown in FIG. 6, the inner heat resistant pipe 104 and the outer heat resistant pipe 106 that are divided into two parts with the side wall 101 a of the waterproof pan 101 as a boundary are connected to the side wall 101 a of the waterproof pan 101 as a reinforcing metal fitting. They are connected by joint members 109 and 109 fixed via 108.

That is, the internal heat resistant pipes 104, 104 routed from the circulation adapter 102a in the bathtub 102 are connected to the joint members 109, 109, while the external heat resistant pipes 106, 106 routed from the water heater 103 are the joints. By being connected to the members 109, 109, the internal heat resistant tube 104 and the external heat resistant tube 106 are substantially connected. In the figure, reference numerals 110 and 111 denote joint covers.
Japanese Patent Laid-Open No. 9-4250

  However, according to the above-described prior art, the heat-resistant pipe for hot water supply is divided into the internal heat-resistant pipe 104 and the external heat-resistant pipe 106 with the side wall 101a of the waterproof pan 101 as a boundary, and is in a so-called “edge cutting” state. As a matter of course, the outer tube is also in an “edge cut” state that is divided into an inner outer tube 105 and an outer outer tube 107 with the side wall 101 a of the waterproof pan 101 as a boundary.

  In such an “edge cutting” state, when the piping is routed, the operation of connecting the internal heat-resistant tubes 104 and 104 and the external heat-resistant tubes 106 and 106 to the joint members 109 and 109 is involved. Therefore, piping work will be troublesome.

  In addition, if there is a connection portion between the internal heat-resistant pipes 104 and 104 and the external heat-resistant pipes 106 and 106, for example, when a water leak occurs on the inner surface of the bottom wall of the waterproof pan 101, the water level reaches the connection portion. If it goes up, there is a risk of water leaking from the connecting part.

  The present invention has been made in view of the above circumstances, and it is not necessary to divide the heat-resistant pipe for hot water supply and the exterior pipe into two parts at the wall of the waterproof pan. It is an object of the present invention to provide a hot water supply piping routing structure for a bathtub and a waterproof sleeve used in the routing structure that can eliminate the fear of the problem.

The above problem is solved by the following means.
(1) For bathtubs for hot water supply from a hot water heater arranged outside the waterproof pan of the unit bath in which a washing place and a recess for bathtubs are formed to a bathtub arranged in the recess through a heat-resistant pipe for hot water supply In the hot water supply pipe routing structure, the wall portion of the waterproof pan is formed with a through-hole for piping for routing the heat-resistant pipe extending from the hot water heater side to the bathtub side through the exterior pipe. Is mounted with a waterproof sleeve that holds liquid tightly between the outer peripheral surface of the outer tube and the inner peripheral surface of the through-hole in the inserted state of the outer tube, and the waterproof sleeve is an outer periphery of the outer tube. A tubular hot water supply pipe routing structure, characterized in that a cylindrical elastic bushing that holds liquid tightly between surfaces is provided.
(2) The waterproof sleeve has an annular flange that faces the outer surface of the wall portion of the waterproof pan, and a sleeve base that is fitted into the through hole from the outside of the wall portion, and the wall portion of the waterproof pan. Between the outer surface of the sleeve base and the flange of the sleeve base, and is formed on the outer peripheral surface of the inner end of the sleeve base and the first annular packing that is fitted on the inner end of the sleeve base. A nut that is screwed into a male thread portion, and a second annular packing that is interposed between the nut and the inner surface of the wall portion of the waterproof pan, and is fitted onto the inner end portion of the sleeve base, The cylindrical elastic bushing has a base end portion that is externally fixed to the inner end portion of the sleeve base, and a tip end portion that is formed in a tapered shape so as to be in close contact with the outer peripheral surface of the outer tube (1) The hot water supply piping structure for bathtubs as described in 1.
(3) A sleeve base having an annular flange facing the outer surface of the wall portion of the waterproof pan of the unit bath, and an outer surface of the wall portion of the waterproof pan, the sleeve base being fitted into the through hole from the outside of the wall portion A first annular packing that is interposed between the sleeve base and the outer end of the sleeve base, and a male screw formed on the outer peripheral surface of the inner end of the sleeve base. A nut that is screwed together, and a second annular packing that is interposed between the nut and the inner surface of the wall of the waterproof pan, and is fitted on the inner end of the sleeve base. Waterproof sleeve.
(4) The cylindrical elastic bushing is formed in a tapered shape so that a base end portion thereof is fitted and fixed to an inner end portion of the sleeve base, and a distal end portion thereof is in close contact with the outer peripheral surface of the outer tube. The waterproof sleeve according to the preceding item (3).

  According to the invention described in the preceding item (1), if a through hole for piping is formed in the wall portion of the waterproof pan and a waterproof sleeve is attached to the through hole in piping construction, hot water inserted through the outer tube The heat-resistant pipe for use can be continuously piped between the water heater and the bathtub by inserting the heat-resistant pipe together with the outer pipe into the waterproof sleeve.

  In other words, it is not necessary to divide the outer tube and the heat-resistant pipe for hot water supply into the inside and the outside of the wall part of the waterproof pan, so that there is no so-called “edge cutting”, so connection using a conventional joint member is possible. No piping process is required, and piping work is accomplished neatly.

  Further, since the use of the waterproof sleeve keeps the space between the outer peripheral surface of the outer tube and the inner peripheral surface of the through hole liquid-tight, for example, water leakage that accumulates on the inner surface of the bottom wall of the waterproof pan occurs. Even in this case, the water can be prevented from leaking outside through the gap between the outer peripheral surface of the outer tube and the inner peripheral surface of the through hole.

  Further, the cylindrical male bushing provided in the waterproof sleeve keeps the space between the outer peripheral surface of the outer tube and the outer peripheral surface of the outer tube, so that water drops between the outer peripheral surface of the outer tube and the inner peripheral surface of the sleeve base body. Intrusion of water can be prevented, and water leakage from this part to the outside is effectively prevented.

  According to the invention described in (2) above, the inner end of the sleeve base is fitted into the through-hole from the outside of the wall of the waterproof pan, and the inside of the sleeve base that protrudes to the inside of the wall of the waterproof pan. If the nut is screwed onto the male threaded portion at the end, the waterproof sleeve can be easily attached to the through hole, and the first and second annular packings assembled at the time of attachment are tightened by the nut, A liquid-tight structure between the outer peripheral surface of the pipe and the inner peripheral surface of the through hole is achieved easily and reliably.

  Further, since the tapered tip of the cylindrical elastic bushing is elastically adhered to the outer peripheral surface of the outer tube, a liquid-tight structure between the outer peripheral surface of the outer tube and the outer tube is easily achieved in an appropriate state. The

According to the invention described in (3), the effect described in the first half of the previous item (2) is achieved. According to the invention described in (4), the effect described in the latter half of the previous item (2) is achieved.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a partially broken perspective view showing a unit bath to which a hot water supply pipe routing structure for a bathtub according to an embodiment of the present invention is applied.

  In FIG. 1, the unit bath includes a waterproof pan 1, a bathtub 2, a hot water heater 3, and a hot water supply piping section 4 from the hot water heater 3 to the bathtub 2.

  The waterproof pan 1 is formed by integrally forming a washing place 12 and a recess 13 for installing a bathtub that is stepped down from the washing place 12 with a synthetic resin or the like, and is supported by a plurality of pedestal members 11. It is installed on F.

  The bathtub 2 is installed in the recess 13, and the side wall 2 a of the bathtub 2 is equipped with a circulation adapter 21.

  The water heater 3 is attached to a predetermined location outside the waterproof pan 1, for example, the outer surface of the side wall portion 13 b of the waterproof pan 1, and supplies the generated hot water into the bathtub 2 via the pipe portion 4. It has become. In addition, the hot water heater 3 can be recharged.

  The pipe section 4 includes an outer tube 5 made of a synthetic resin called a sheath tube, a pair of heat-resistant tubes (also referred to as a pair tube) 6 and 6 inserted into the outer tube 5, and a waterproof pan 1. It consists of a waterproof sleeve 7 for piping attached to a wall portion, for example, the bottom wall portion 13 a of the recess 13.

  One end sides of both heat-resistant tubes 6 and 6 are connected to a predetermined output port of the water heater 3, and the other end sides are connected to the circulation adapter 21.

  The waterproof sleeve 7 is attached to a through hole 8 formed in the bottom wall portion 13 a of the recess 13.

  Next, the structure of the waterproof sleeve 7 will be described with reference to FIGS.

2 to 4, the waterproof sleeve 7 includes a cylindrical sleeve base 71, and
A first annular packing 72, a nut 73, a second annular packing 74, an annular sheet member 75, a cylindrical elastic bushing 76, and a fastening band 77 are provided.

  The sleeve base 71 is integrally formed with an annular flange 71a at the base end, and its inner end 71c is fitted into the through-hole 8 from the bottom surface side of the bottom wall 13a of the recess 13 to be waterproof. It comes out in bread 1. On the outer peripheral surface of the inner end portion 71c of the sleeve base 71, a male screw portion 71b is formed on the side closer to the collar portion.

  The inner diameter of the sleeve base 71 is set slightly larger than the outer diameter of the outer tube 5 so that the outer tube 5 can be inserted therethrough.

  The first annular packing 72 is interposed between the flange portion 71a of the sleeve base 71 and the outer surface of the bottom wall portion 13a, and is fitted on the inner end portion 71c of the sleeve base 71. .

  The nut 73 has a female screw portion 73a that is screwed into the male screw portion 71b, and sandwiches the bottom wall portion 13a with the sleeve base 71.

  An annular washer portion 73b is integrally formed on the lower end side of the nut 73 in order to uniformly press the entire circumference of the annular sheet 75.

  The second annular packing 74 is interposed between the nut 73 and the inner surface of the bottom wall portion 13a and is fitted on the inner end portion 71c of the sleeve base 71.

  The annular sheet member 75 is interposed between the second annular packing 74 and the nut 73 and is fitted on the inner end 71 c of the sleeve base 71.

  The elastic bushing 76 is formed into a substantially cylindrical shape with rubber or the like, and is fitted on the distal end side of the inner end portion 71c of the sleeve base 71 so as to be fitted. The distal end portion 76 b of the elastic bushing 76 is formed in a tapered shape so as to be in close contact with the outer peripheral surface of the outer tube 5 inserted through the sleeve base 71.

  The fastening band 77 is for fastening the base end portion 76a of the elastic bushing 76 to the inner end portion 71c of the sleeve base 71, and is made of, for example, an insulation lock tie. Of course, if the base end portion 76a of the elastic bushing 76 can be in close contact with the inner end portion 71c of the sleeve base 71 with a strong elastic force, the fastening band 77 can be omitted.

  Next, a piping routing procedure for the pair of heat-resistant tubes 6 and 6 and the outer tube 5 will be described.

  In the actual routing operation, the waterproof sleeve 7 is attached to the through-hole 8 of the waterproof pan 1.

  In that case, first, the first annular packing 72 is externally fitted to the inner end portion 71 c of the sleeve base 71, and then the inner end portion 71 c of the sleeve base 71 is connected to the outside of the bottom wall portion 13 of the waterproof pan 1. The state of being fitted into the through hole 8 is maintained.

  As a method of fitting the inner end portion 71c of the sleeve base 71 into the through hole 8 from the outside of the bottom wall portion 13 of the waterproof pan 1, for example, when the waterproof pan 1 is installed on the floor F, the through hole A string (not shown) hung from 8 is tied to the sleeve base 71, and the sleeve base 71 is pulled up via the string in the installed state of the waterproof pan 1, and its inner end 71c is connected to the through hole. 8 is inserted. For this purpose, the sleeve base 71 is preferably formed with a hole 71d through which a string can be tied.

  Thereafter, the second annular packing 74 and the annular sheet member 75 are sequentially fitted on the inner end portion 71c of the sleeve base 71 protruding to the inner surface side of the bottom wall portion 13 of the waterproof pan 1, The nut 73 is screwed into the male thread 71b of the sleeve base 71 and tightened.

  As a result, the bottom wall portion 13 a of the waterproof pan 1 is sandwiched between the flange portion 71 a of the sleeve base 71 and the nut 73, and the sleeve base 71 is attached to the bottom wall portion 13 a of the waterproof pan 1.

  The elastic bushing 76 is attached by fitting the base end portion 76a of the elastic bushing 76 to the inner end portion 71c of the sleeve base 71. Further, by tightening the base end portion 76a of the elastic bushing 76 using the tightening band 77, the elastic bushing 76 is secured in a more firm state.

  In this state, the sleeve base 71 is connected from the outside of the bottom wall portion 13a of the waterproof pan 1 to the drawing end side of the outer tube 5 through which the heat-resistant tubes 6 and 6 are inserted and drawn from the water heater 3 side. The elastic bushing 76 is further inserted, and then the elastic bushing 76 is drawn to a predetermined position of the bathtub 2.

  And if each edge part of the said one pair of heat-resistant pipes 6 and 6 is connected to the circulation adapter 21 in the said bathtub 2, piping piping work will be completed.

  In this way, if the waterproof sleeve 7 is attached to the through hole 8 formed in the bottom wall portion 13a of the waterproof pan 1, the waterproof sleeve 7 is used to connect the pair of heat-resistant tubes 6 and 6 and the 1 The outer tube 5 through which the pair of heat-resistant tubes 6 and 6 are inserted can be drawn through the bottom wall portion 13a of the waterproof pan 1.

  That is, it is not necessary to “edge-cut” the heat-resistant pipes 6 and 6 and the outer pipe 5 on the inner side and the outer side with the bottom wall portion 13a of the waterproof pan 1 as a boundary, and the piping from the water heater 3 side to the bathtub 2 side is eliminated. Rotation is continuous and piping can be done quickly.

  Further, the bottom wall portion 13a of the waterproof pan 1 does not have a connection portion between the pair of heat-resistant tubes 6 and 6, and the outer tube 5 also penetrates the bottom wall portion 13a through the waterproof sleeve 7. Even if water accumulates on the inner surface of the bottom wall portion 13a of the waterproof pan 1 due to water leakage or the like, the possibility of the water leaking to the outside from the penetration portion of the outer tube 5 is eliminated.

  Specifically, the first annular packing 72 is interposed between the outer surface of the bottom wall portion 13 a of the waterproof pan 1 and the flange portion 71 a of the sleeve base 71, while the bottom of the waterproof pan 1 is Since the second annular packing 72 is interposed between the inner surface of the wall portion 13 a and the nut 73, the liquid tightness between the inner peripheral surface of the through hole 8 and the outer peripheral surface of the outer tube 5. Even when water is collected on the inner surface side of the bottom wall portion 13a of the waterproof pan 1, this water leaks to the outside through the gap between the inner peripheral surface of the through hole 8 and the outer peripheral surface of the outer tube 5. Is surely prevented.

  In addition, since the distal end portion 76b of the elastic bushing 76 fitted on the inner end portion 71c of the sleeve base 71 is formed in a tapered shape and is brought into close contact with the outer peripheral surface of the outer tube 5, the inner periphery of the elastic bushing 76 is Water droplets are prevented from entering between the surface and the outer peripheral surface of the outer tube 5. This can effectively prevent water leakage from the gap between the outer peripheral surface of the outer tube 5 and the inner peripheral surface of the sleeve base 71.

  In the above-described embodiment, the example in which the through-hole 8 to which the waterproof sleeve 7 is attached is provided in the bottom wall portion 13a of the waterproof pan 1, but the formation site of the through-hole 8 is limited to the bottom wall portion 13a. It is also possible to provide not the thing but the side wall part 13b of the waterproof pan 1. FIG.

  Further, the waterproof sleeve 7 is not limited to the configuration of the above embodiment, and various deformation structures can be adopted as long as the above-described liquid-tight function can be maintained.

It is a partially broken perspective view which shows the unit bath to which the drawing structure of the hot water supply piping for bathtubs concerning embodiment of this invention was applied. It is a disassembled perspective view which shows the waterproof sleeve similarly used for the drawing structure of the hot water supply piping for bathtubs. It is a perspective view which similarly shows the use condition of a waterproof sleeve. It is sectional drawing which similarly shows the use condition of a waterproof sleeve. It is a partially broken perspective view which shows the unit bath to which the conventional piping structure of the hot water supply piping for bathtubs was applied. It is explanatory drawing of the piping connection part in a prior art example.

Explanation of symbols

1 .... Waterproof pan 2 .... Ttub 3 .... Water heater 4 .... Pipe for hot water supply 5 .... Exterior Tube 6,6 ... Heat-resistant tube 7 .... Waterproof sleeve 8 .... Penetration hole 12 .... Washing area 13 .... Recess for bath 13a: Wall (bottom wall)
71 ······· Sleeve base 71a ··· Sleeve 71b · · · Sleeve base male thread portion 71c · · · Sleeve base end portion First annular packing 73... Nut 73 a... Internal thread 74... Second annular packing 76... Cylindrical elastic bushing 76 a. Base end portion of cylindrical elastic bushing 76b ... Tip end portion of cylindrical elastic bushing

Claims (4)

A hot water supply pipe for a bathtub for supplying hot water from a water heater disposed outside a waterproof pan of a unit bath in which a washing place and a recess for a bathtub are formed to a bathtub disposed in the recess through a heat-resistant pipe for hot water supply In the routing structure,
The wall portion in the waterproof pan is formed with a through-hole for piping for routing the heat-resistant pipe extending from the water heater side to the bathtub side, which is inserted into the outer pipe.
The through-hole is equipped with a waterproof sleeve that holds the space between the outer peripheral surface of the outer tube and the inner peripheral surface of the through-hole in the inserted state of the outer tube,
The water proof sleeve is provided with a cylindrical elastic bushing that is liquid-tightly maintained between the outer tube and the outer peripheral surface of the outer tube. The waterproof sleeve is
A sleeve base that has an annular flange facing the outer surface of the wall portion of the waterproof pan, and is fitted into the through hole from the outside of the wall portion;
A first annular packing that is interposed between the outer surface of the wall portion of the waterproof pan and the flange portion of the sleeve base and is fitted on the inner end of the sleeve base;
A nut that is screwed into a male thread formed on the outer peripheral surface of the inner end of the sleeve base;
A second annular packing interposed between the nut and the inner surface of the wall portion of the waterproof pan and fitted to the inner end of the sleeve base;
With
2. The cylindrical elastic bushing is tapered so that a base end portion thereof is fitted and fixed to an inner end portion of the sleeve base and a distal end portion thereof is in close contact with the outer peripheral surface of the outer tube. The hot water supply piping structure for bathtubs as described in 1. A sleeve base that has an annular flange facing the outer surface of the wall of the waterproof pan of the unit bath, and is fitted into the through-hole from the outside of the wall;
A first annular packing that is interposed between the outer surface of the wall portion of the waterproof pan and the flange portion of the sleeve base and is fitted on the inner end of the sleeve base;
A nut that is screwed into a male thread formed on the outer peripheral surface of the inner end of the sleeve base;
A second annular packing interposed between the nut and the inner surface of the wall portion of the waterproof pan and fitted to the inner end of the sleeve base;
A waterproof sleeve comprising a cylindrical elastic bushing having a base end portion fitted and fixed to an inner end portion of the sleeve base. The waterproof sleeve according to claim 3, wherein the cylindrical elastic bushing is formed in a tapered shape so that a tip end portion thereof is in close contact with an outer peripheral surface of the outer tube.

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