JP2007255119A - Pipe connecting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe connecting structure capable of reducing cost, by dispensing with a large stand, by reducing quantity of fixing tools for fixing a pipe, by improving pipe strength, while surely preventing water leakage from a pipe connecting part. <P>SOLUTION: A water supply pipe system 5 supplies water to a toilet bowl 1 from a flush valve 2. The pipes 44, 56 and 57 are made of a steel pipe with ends in the longitudinal direction threaded with steel pipe threads. A connecting part of the pipe 44 and the flush valve 2 is connected by a union joint 43 and an adapter 41 with the steel pipe threads threaded. A connecting part of the pipe 44 and the pipe 56 is connected by a 90-degree elbow 55 with steel pipe threads threaded. A connecting part of the pipe 56 and the pipe 57 is connected by a union joint 61 and an adapter 59 with steel pipe threads threaded. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pipe connection structure.

  When washing the toilet bowl, the wash water can be supplied from the flush valve to the toilet bowl through a pipe. Thus, FIG. 7 shows an example of a conventional pipe connection structure for supplying the water supplied through the pipe from the flush valve to the toilet.

  In FIG. 7, 1 is a toilet bowl, 2 is a flush valve, 3 is a stop valve, 4 is a water supply pipe system for supplying water to the flash valve 2 via the stop valve 3, and 5 is water supply from the flash valve 2 to the toilet 1 A water supply pipe system 6 is a frame for supporting the flash valve 2, the stop valve 3, and the water supply pipe systems 4 and 5.

  As shown in the sectional view of FIG. 8, a female screw 8 is screwed on the inner periphery of a short tubular inlet portion 7 formed vertically at the lower end of the stop valve 3, and a nipple 9 is screwed on the female screw 8. Are combined. Further, the nipple 9 and the pipe 10 disposed vertically below the nipple 9 are connected by a joint 13 screwed to the nipple 9 and male threads 11 and 12 on the outer periphery of the pipe 10.

  The short tubular outlet portion 14 of the stop valve 3 is fitted with a pipe 15 extending horizontally and having a tip connected to the flash valve 2. A male screw 16 is screwed on the outer periphery of the outlet portion 14, and a cap nut 17 is screwed to the male screw 16. Further, a packing 18 that is externally fitted to the pipe 15 is interposed between the distal end portion of the outlet portion 14 and the inner hole step portion of the cap nut 17.

  Thus, the water supply pipe system 4 includes the pipe 10, the joint 13, the nipple 9, the stop valve 3, and the pipe 15.

  As shown in the cross-sectional view of FIG. 9, a male screw 20 is formed on the outer periphery of the short tubular outlet portion 19 formed at the lower end of the flash bulb 2, and the upper end of a pipe 21 extending downward is formed at the outlet portion 19. Is fitted. Further, a cap nut 22 is screwed onto the male screw 20 of the outlet part 19 so as to be fitted on the outer periphery of the pipe part 21 on the outlet part 19 side. Between the lower end portion of the outlet portion 19 and the inner hole step portion of the cap nut 22, a packing 23 externally fitted to the cap nut 22 is interposed.

  As shown in the cross-sectional view of FIG. 10, the lower end side of the pipe 21 is fitted into the pipe 24 whose middle part is narrowed so that the lower end extends to the vicinity of the narrowed part of the pipe 24. A male screw 25 is screwed on the outer periphery of the upper end of the pipe 24, and a cap nut 26 is screwed to the male screw 25. Further, a packing 27 fitted on the pipe 21 is interposed between the upper end of the pipe 24 and the inner hole step portion of the cap nut 26.

  As shown in FIG. 10, the pipes 21 and 24 are connected not by fitting the pipe 21 into the pipe 24, extending to the throttle portion, and fixing with the cap nut 26, but as shown in FIG. 11. A flange 28 is formed at the lower end of the pipe 21, a packing 27 is interposed between the upper end of the pipe 24 and the lower face of the pipe 28, and a cap nut 26 is screwed onto the male screw 25 of the pipe 24 to connect the pipes 21, 24. In some cases, they are linked.

  The pipe 24 bends in the middle part and extends horizontally toward the toilet 1, and as shown in the cross-sectional view of FIG. 12, the tip side is connected to the horizontal part of the pipe 29 in which the middle part is squeezed. Is internally fitted so as to extend to the vicinity of the throttle portion of the pipe 29. Further, a male screw 30 is screwed on the outer periphery of the pipe 24 side end of the pipe 29, and a cap nut 31 is screwed to the male screw 30. Further, a packing 32 externally fitted to the pipe 24 is interposed between the end of the pipe 29 and the inner hole step of the cap nut 31.

  As shown in FIG. 12, the pipes 24 and 29 are connected to the pipe 29 by extending the pipe 24 to the vicinity of the throttle portion and fixed by the cap nut 31, as shown in FIG. 13. A flange 33 is formed at the end of the pipe 24, the packing 32 is interposed between the end of the pipe 29 and the end face of the pipe 33, and the cap nut 31 is screwed into the male screw 30 of the pipe 29. 24 and 29 may be connected.

  The pipe 29 connected to the pipe 24 extends horizontally, bends at the upper part of the toilet 1 and faces downward, and its lower end is located above the toilet 1 as shown in the sectional view of FIG. It is fitted in a short tubular inlet 34 that protrudes toward the bottom. A male screw 35 is screwed on the outer periphery of the upper end of the inlet portion 34, and a cap nut 36 is screwed to the male screw 35. Further, a packing 37 that is externally fitted to the pipe 29 is interposed between the upper end portion of the inlet portion 34 and the inner hole step portion of the cap nut 36. Thus, the water supply pipe system 5 is formed by the pipes 21, 24, and 29.

  In the vicinity of the toilet 1 of the pipe 29, a partition wall having a deck mounted on a light iron partition or a special frame to shield the flash valve 2, the stop valve 3, the water supply pipe systems 4, 5 and the mount 6 38 is provided, and a cap 39 is attached to a portion where the pipe 29 penetrates the partition wall 38. In the figure, reference numeral 40 denotes a fixing jig for fixing the pipes 10, 21, 24, 29 to the mount 6.

There exists patent document 1 as a prior art document of a toilet unit. The toilet unit of this patent document 1 is for storing the stop cock and the extra length of the water supply hose in the unit to improve the design, and has a hot water washing toilet seat inside the water supply / drainage pipe In the toilet unit in which the toilet is stored, a stop cock for a cleaning toilet seat is provided in the unit.
JP 2002-302990 A

  In the conventional pipe connection structure shown in the above figure, a cap nut is used to connect the pipe. Therefore, in the case of a piping structure that uses a cap nut, piping is usually made in a place that can be easily seen by people in order to cope with water leakage, but recently, a partition wall has been provided from the viewpoint of aesthetics. Pipes, flush valves, stop valves, mounts, etc. are shielded from human eyes.

  On the other hand, in the conventional pipe connection structure, in the pipe structures shown in FIGS. 9, 10, 12, and 14, the pipe is provided only by friction, and the cap nut has few screw parts in all cases. When the flash valve is used, the cap nut loosens due to the accumulation of vibrations and earthquakes, and water leakage always occurs from the connection. Therefore, if there is a place where the piping is visible, it will be immediately noticed when water leaks, so it can be stopped by replacing parts such as packing or tightening the cap nuts. Since it is shielded by the partition wall, if there is water leakage, it will not be noticed unless the water leaks under the partition wall or downstairs.

  Also, since the pipe applied to the cap nut is made of a copper alloy of about 1 mm, there is not much strength at the connection part. Therefore, it is necessary to provide a fixing jig at short intervals so that the pipe does not bend. , Fixing jigs and construction work increase, resulting in increased costs.

  In addition, since there is no work space in the partition wall, the partition wall and frame must be disassembled during the repair work, so the work takes time, and therefore the repair work is performed in a short period due to water leakage etc. Increases the wasted time when the toilet cannot be used.

  In the case of the toilet unit of Patent Document 1, the pipe connection structure is different from the conventional one shown in FIGS. 7 to 14 and is not directly related.

  In view of such circumstances, the present invention is capable of reliably preventing water leakage from the pipe connection portion, and improving the pipe strength to reduce the number of fixing jigs for fixing the pipe and to eliminate the need for a large mount. Thus, the purpose of the present invention is to provide a pipe connection structure capable of reducing the cost.

  The pipe connection structure according to claim 1 is a water supply pipe system for supplying water from a flush valve to a toilet. The pipe through which the water is circulated is made of a steel pipe with a steel pipe threaded at the end in the longitudinal direction. Are connected by a joint means subjected to threading for a steel pipe.

  In the pipe connection structure according to claim 2, the connecting portions of the pipes adjacent to each other in the longitudinal direction are connected by joint means subjected to steel pipe threading. In the pipe connection structure according to claim 3, the joint means includes: It is at least one of a combination of an adapter and a union joint, an elbow, or a combination of an adapter and a tubular joint.

  According to the pipe connection structure of the first to third aspects of the present invention, even if there is a pile of vibration or an earthquake when using the flash valve, the pipe connection part does not loosen and reliably prevents water leakage. Therefore, it is not necessary to dismantle the partition walls and mounts for renovation against water leakage, and the piping is made of steel pipe and has higher strength than copper alloy, so there is no need to install many fixing jigs. In addition, a large gantry is not required. As a result, various excellent effects can be achieved, such as equipment being simplified, installation man-hours being reduced, and cost reduction being possible.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIGS. 1-6 is an example of the form which implements this invention, In the figure, the same code | symbol is attached | subjected to the thing same as what is shown in FIGS. In the following description, the screws screwed into the pipes and joints of the water supply systems 4 and 5 are all steel pipe screws (tapered screws).
Thus, in the illustrated example, the water supply pipe system 4 on the inlet side of the flash valve 2 has the same configuration as the conventional one shown in FIG. 7, but the water supply pipe system 5 from the flash valve 2 to the toilet 1 is shown. Is different from the conventional one.

  That is, as shown in the cross-sectional view of FIG. 2, an adapter 41 is screwed into the male screw 20 at the outlet 19 at the lower end of the flash bulb 2, and the lower end of the outlet 19 of the flash bulb 2 and the inner hole of the adapter 41. An annular packing 42 is interposed between the two. A union joint 43 is connected to the lower end of the adapter 41, and a pipe 44 made of a steel pipe extending downward is connected to the lower end of the union joint 43.

  The union joint 43 includes a union rod 46 screwed to a male screw 45 screwed to the lower end of the adapter 41, a union screw 48 screwed to a male screw 47 screwed to the upper periphery of the pipe 44, and an upper end side. A hook nut-like union nut 50 that engages with the outer peripheral step portion of the union rod 46 and has a lower end screwed into the male screw 49 on the upper end side of the union screw 48, and the upper end surface of the union screw 48 and the union rod 46, an annular packing 51 interposed between the lower surface 46 and the union nut 50 is turned to easily and quickly connect the pipe 44 to the outlet portion 19 of the flash valve 2, or to the outlet portion. It can be made to detach from 19.

  The outlet 19 of the flash valve 2 and the pipe 44 may be connected without using the union joint 43 shown in FIG. That is, as shown in the sectional view of FIG. 3, the outlet portion 19 of the flash valve 2 and the pipe 44 can be screw-connected by a tubular joint 52, and as shown in FIG. 4, An adapter 54 having a flange 53 formed at an intermediate portion in the height direction may be screwed onto the male screw 20, and the lower end of the adapter 54 and the upper end of the pipe 44 may be screw-connected by a tubular joint 52. In the case of FIG. 4, a packing 42 is interposed between the lower end of the outlet portion 19 and the inner hole step portion of the adapter 54.

  As shown in the cross-sectional view of FIG. 5, a 90-degree elbow 55 is screwed to the lower end of the pipe 44, and a steel pipe pipe 56 is horizontally screw-connected to the 90-degree elbow 55.

  From the pipe 56 side to the toilet 1, it extends horizontally from the pipe 56 side and is bent downward at a right angle so that the lower end of the vertical portion is in the entrance 34 of the toilet 1 as in the conventional example of FIG. A pipe 57 made of steel pipe screwed on the male screw 35 is provided. Thus, a male screw 58 is screwed on the outer periphery of the pipe 56 side end of the pipe 57, and an adapter 59 is screwed onto the male screw 58 as shown in the cross-sectional view of FIG. An annular packing 60 is interposed between the horizontal end of the pipe 57 and the inner hole step of the adapter 59.

  Further, a union joint 61 is connected to the pipe 56, and an adapter 59 is connected to the union joint 61. That is, the union joint 61 includes a union screw 63 that is screwed to the outer periphery of the end portion of the pipe 56 on the adapter 59 side and a male screw 64 that is screwed to the outer periphery of the end portion of the adapter 59 on the pipe 56 side. The screwed nut ユ ニ 65 and the flange portion on the adapter 59 side are locked to the outer peripheral step portion of the union rod 65, and the pipe 56 side end portion is screwed to the male screw 66 on the outer periphery of the union screw 63. And an annular packing 68 interposed between the end of the union screw 63 and the end of the union rod 65. By turning the union nut 67, it is easy and quick. The pipe 56 can be connected to or removed from the adapter 59.

  In the figure, reference numeral 69 denotes a bracket that is erected from the floor and supports the pipe 56, and 70 is a U bolt that fixes the pipe 56 to the bracket 69.

Next, the operation of the above-described embodiment will be described.
By operating the flush valve 2, water is supplied to the toilet 1 through the water supply pipe system 4, the flash valve 2, and the water supply pipe system 5, and the toilet 1 is washed. In the water supply pipe system 5, the pipes 44, 56, 57 are not inserted into opposite pipes and fixed with cap nuts as in the prior art, but the union joints 43, 61, 90 ° elbow 55, tubular joint 52, etc. Therefore, it is possible to connect firmly and firmly, and the pipes 44, 56, and 57 are made of steel pipe.

  For this reason, even if there is an accumulation of vibration or an earthquake when the flash valve 2 is used, the connection portions of the pipes 44, 56, and 57 are not loosened, and water leakage can be reliably prevented. Therefore, even if the water supply pipe systems 4 and 5 are shielded by the partition wall 38, it is not necessary to disassemble the partition wall 38 or the gantry, and the pipes 44, 56, and 57 are made of steel pipe and have higher strength than the copper alloy. Therefore, it is not necessary to provide a large number of fixing jigs, and a large gantry is not required. As a result, the equipment is simplified, the number of installation steps is reduced, and the cost can be reduced.

  Note that the pipe connection structure of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

It is a front view of an example of an embodiment of a pipe connection structure of the present invention. It is an expanded sectional view of the II section of FIG. It is an expanded sectional view which shows the other example of the II section of FIG. It is an expanded sectional view which shows the other example of the II section of FIG. It is an expanded sectional view of the V section of FIG. It is an expanded sectional view of the VI section of FIG. It is a front view of an example of the conventional piping connection structure. It is an expanded sectional view of the VIII part of FIG. It is an expanded sectional view of the IX part of FIG. It is an expanded sectional view of the X section of FIG. It is an expanded sectional view which shows the other example of the X section of FIG. It is an expanded sectional view of the XII part of FIG. It is an expanded sectional view which shows the other example of the XII part of FIG. It is an expanded sectional view of the XIV part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toilet bowl 2 Flash valve 5 Water supply pipe system 41 Adapter (joint means)
43 Union joint (joint means)
44 Piping 52 Tubular joint (joint means)
54 Adapter (joint means)
55 90 degree elbow (joint means)
56 Piping 57 Piping 59 Adapter (joint means)
61 Union joint (joint means)

Claims (3)

  In the water supply pipe system that supplies water from the flush valve to the toilet, the pipe through which the water supply circulates is made of steel pipe with steel pipe threaded at the end in the longitudinal direction, and the pipe and flush valve are joints with threaded steel pipe. Piping connection structure characterized by being connected by means.   The pipe connection structure according to claim 1, wherein the connecting portions of the pipes adjacent to each other in the longitudinal direction are connected by joint means subjected to steel pipe threading.   The pipe connection structure according to claim 1 or 2, wherein the joint means is at least one of a combination of an adapter and a union joint, an elbow, or a combination of an adapter and a tubular joint.

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