JP2012127135A - Drainage structure of toilet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage structure of a toilet, in which wastewater discharged from a toilet bowl and wastewater discharged from a hand wash basin are merged together in a downstream location so as to flow down into sewers, and which can surely prevent backflow of a malodor and the like from the sewers, without use of seal water having the risk of seal destruction or the ejection of the wastewater over a drain pipe for the hand wash basin.SOLUTION: In a drainage structure of a toilet, a drainage channel for a toilet bowl, which allows the flow-down of wastewater discharged from the toilet bowl, and a drainage channel for a hand wash basin, which allows the flow-down of wastewater discharged from the hand wash basin installed in the toilet, are merged together in a downstream location so as to discharge the wastewater into sewers. A membrane-type self-sealing trap is formed on the drainage channel for the hand wash basin.

Description

  The present invention relates to a toilet drainage structure, and more particularly, to a toilet drainage structure in which drainage discharged from a toilet bowl and drainage discharged from a hand-washer are merged downstream to flow down into sewage.

  Conventionally, as shown in FIG. 7, as a drainage structure of a toilet, a drainage channel for discharging drainage from the toilet 100 is connected to a drainage pipe 101 embedded in the toilet floor, and is separated from the toilet 100. A toilet drainage structure 104 is known in which a drainage pipe 103 for a handwasher that flows down drainage discharged from a handwasher 102 formed at a position joins the drainage pipe 101 (for example, Patent Document 1 and Patent Document 2). . In the toilet drainage structure 104, a trap 106 for storing a certain amount of sealed water is formed in the toilet bowl to suppress backflow of odors from sewage, and the handwasher drain pipe 103 is also U-shaped. A curved U-shaped trap 105 is formed.

  Since the drainage structure 104 of the toilet thus formed discharges both the drainage from the toilet 100 and the drainage from the handwasher 102 to the same drainage pipe 101, it is necessary to separately lay a drainage pipe for the handwasher on the building side. Since there is no, installation cost can be reduced.

JP 2000-248603 A JP 2003-313925 A

  By the way, since the waste water from the toilet 100 needs to make filth flow down to the sewage, it is stored in the water stored in the storage tank 107 installed above the back of the toilet 100 and the trap 106 formed in the toilet. The sealed water is vigorously discharged to the drain pipe 101 side. When drainage is discharged from the toilet 100 to the drainage pipe 101 side, a strong pressure is generated in the drainage pipe 101, and the drainage pipe 103 for the hand-washer connected to the drainage pipe 101 is also in the reverse flow direction. High pressure will be applied. When the handwasher drain pipe 103 is pressurized in the reverse flow direction, pressure is applied to the U-shaped trap 105 formed on the path of the handwasher drain pipe 103 from the downstream side. There is a possibility that the sealed water stored in the squirt may be ejected to the handwasher 102 side.

  Moreover, in many flush toilets, siphon phenomenon is generated downstream by drainage discharged from the toilet 100, and filth is discharged by the suction force. However, not only the toilet 100 but also the drainage pipe side 103 for the hand-washer. Negative pressure due to the siphon phenomenon is applied. And the negative pressure attracted | sucked downstream is also applied to the U-shaped trap 105 formed on the path | route of the drain pipe 103 for hand-washing machines, and the sealed water stored in this U-shaped trap 105 is downstream. , And there is a risk that the U-shaped trap 105 may be broken due to insufficient sealing water.

  Therefore, the present invention is a toilet drainage structure in which wastewater discharged from a toilet bowl and wastewater discharged from a handwasher are merged downstream to flow down into sewage, An object of the present invention is to provide a toilet drainage structure that can reliably prevent backflow such as odor from sewage without using sealed water that may be broken.

  In order to achieve the above-mentioned object, the toilet drainage structure according to claim 1 is a toilet drainage channel for flowing down drainage discharged from a toilet and drainage discharged from a hand-washer installed in the toilet. And a drainage structure for a toilet that drains the handwasher drain flow path downstream and discharges it into the sewage, wherein a membrane-type self-sealing trap is formed on the drainage flow path for the handwasher.

  Here, the “membrane-type self-sealing trap” is formed in a cylindrical shape with an open upstream side, and two plate-like valve bodies that are continuous from the upstream side and contact each other on the downstream side. When the drainage flows from the upstream side, the trap body is formed by the formed elastic body, and the two valve bodies on the downstream side of the trap are elastically deformed and opened in the direction away from each other due to the pressure of the drainage. Wastewater can be discharged to the downstream side, and when the odor rises from the downstream side, the odor can be blocked by two valve bodies that are continuously formed from the upstream side and contact each other. It is.

  The toilet drainage structure according to claim 2, wherein the self-sealing trap is formed in a horizontal flow path portion provided substantially horizontally in a part of the drainage flow path for the handwasher. Is a pair of upper and lower plates having a cylindrical base end portion on the upstream side and an elastic plate formed continuously from the base end portion on the downstream side, the tips of which are openably and closably contacted. The valve bodies are characterized in that the tips contacting each other are formed below the center in the vertical direction.

  In the toilet drainage structure according to claim 3, unevenness capable of specifying the vertical direction to be fitted to each other is formed on the inner peripheral surface of the drain pipe forming the horizontal flow path portion and the outer surface of the self-sealing trap. It is characterized by that.

  According to the toilet drainage structure of the first aspect, since the membrane-type self-sealing trap is formed on the drainage channel for the hand-washer, it is not necessary to provide a conventional trap for storing the sealing water. This membrane-type self-sealing trap does not hinder the flow of drainage when drainage flows from the upstream to the downstream side. Even if a high pressure is applied in the reverse flow direction, the valve body is closed more firmly using the pressure, so that odor and drainage can be reliably prevented from flowing back to the hand-washer side. Even if a siphon phenomenon occurs on the downstream side and is sucked, the valve bodies of the self-sealing trap are merely separated from each other and air flows only from the upstream side to the downstream side. Are in contact with each other to prevent backflow of odors from the downstream side, so that there is no possibility of breaking like a conventional trap in which sealed water is stored.

  According to the toilet drainage structure according to claim 2, a horizontal flow path portion is formed in the drainage flow path for the hand-washer, and a self-sealing trap is formed in the horizontal flow path portion. Since the tips of the pair of valve bodies that are in contact with each other are formed below the center in the vertical direction, when there is drainage on the upstream side, the valve bodies tend to separate and open, and the upstream side of the self-sealing trap It is possible to suppress the drainage from staying.

  According to the toilet drainage structure according to claim 3, the inner and outer peripheral surfaces of the drainage pipe that forms the horizontal flow path portion and the outer surface of the self-sealing trap are formed with unevenness that can specify the vertical direction to be fitted to each other. Therefore, the self-sealing trap cannot be installed upside down. Therefore, it is possible to suppress the occurrence of problems that cause the self-sealing trap to be upside down during construction.

The perspective view explaining the whole drainage structure of a toilet. A partially omitted cross-sectional view illustrating the structure of a toilet body. (A) is a front view explaining the shape of the self-sealing trap, (B) is a side view explaining the shape of the self-sealing trap, (C) is a rear view explaining the shape of the self-sealing trap, and (D) is the shape of the self-sealing trap. FIG. (A) is sectional drawing which shows the state which the self-sealing trap installed on the drainage flow path for hand-washing machines closed, (B) is sectional drawing which shows the state which the self-sealing trap installed on the drainage flow path for hand-washing machines opened. A front view, a side view, and a perspective view illustrating a self-sealing trap in which a valve body is formed by bending in a circular arc shape whose center swells downward so as to follow the shape of the inner peripheral surface of the drain pipe that forms the horizontal flow path portion. . It is formed to be curved so that the center swells downward along the shape of the inner peripheral surface of the drain pipe that forms the horizontal flow path part, and it is formed in an arc shape so that the tip becomes narrower in the downstream direction. The top view and perspective view explaining the made self-sealing trap. The perspective view explaining the drainage structure of the conventional toilet.

  Hereinafter, the best embodiment of the toilet drainage structure 1 of the present invention will be described with reference to the drawings. As shown in FIG. 1, the toilet drainage structure 1 of the present embodiment is laid in a toilet provided with a Western-style toilet 2 and a hand-washer 3 formed at a position away from the Western-style toilet 2. . In addition, although this embodiment demonstrates using the western style toilet bowl 2, the toilet drainage structure 1 of this invention can be used also in the toilet in which the Japanese style toilet bowl was installed, for example.

  As shown in FIGS. 1 and 2, the western-style toilet 2 includes a toilet seat 4, a water storage tank 5, a lid 6, and a toilet body 7. A trap 9 is formed to prevent intrusion of odors, insects and the like from the toilet, and a toilet drain channel 11 communicating with a drain pipe 10 embedded in the toilet floor is formed downstream of the trap 9. . The hand-washing device 3 includes a faucet 12, a lever 13 for controlling the water discharge, and a sink 14 for receiving water from the faucet 12. Although not shown, a drain outlet is formed at the bottom of the sink 14. In addition, the drainage pipe 16 that forms the drainage flow path 15 for the hand-washer is communicated.

  The drainage pipe 16 that forms the drainage flow path 15 for the hand-washer is formed by connecting a plurality of pipes 19 and 20, and extends substantially vertically downward from the drainage port of the sink 14. A horizontal flow path portion 17 that is curved and extends in a substantially horizontal direction is formed, and the drain pipe 16 extends further to the western style toilet 2 along the toilet wall, and is formed in the toilet body 7. 11 has joined. A membrane-type self-sealing trap 18 is provided at an intermediate position of the horizontal flow path portion 17 as shown in FIGS. The self-sealing trap 18 is installed at a connection portion between the upstream pipe 19 and the downstream pipe 20 of the drain pipe 16 that forms the horizontal flow path portion 17. When constructing the toilet drainage structure 1 of the present embodiment, the base end 21 of the self-sealing trap 18 is inserted into the end of the upstream tube 19 and fixed, and then the downstream tube is connected to the upstream tube 19. The self-sealing trap 18 is installed in the horizontal flow path portion 17 by externally fitting and fixing the body 20.

  As shown in FIG. 3, the self-sealing trap 18 is formed of an elastic resin, and forms a base end portion 21 whose upstream end is open, and the downstream end is the base end. A pair of upper and lower valve bodies 22 formed in a plate shape in which side portions that continuously narrow from the portion 21 toward the distal end side are closed to each other are formed. The pair of upper and lower valve bodies 22 are formed such that the lower valve body 22b is substantially horizontal and the upper valve body 22a is positioned so that the tip thereof is located below the center of the self-sealing trap 18 in the vertical direction. The upper and lower valve bodies 22 are in contact with each other at the tip ends.

  Thus, in the self-sealing trap 18 of the present embodiment, the tip of the pair of upper and lower valve bodies 22 is positioned below, and the lower valve body 22b is formed substantially horizontally, so that the horizontal direction extends in the horizontal direction. Even if it is installed in the flow path portion 17, the amount of drainage flowing down from the upstream side can be reduced by the lower valve body 22 b, and the drainage can be prevented from staying upstream of the self-sealing trap 18.

  Further, as shown in FIGS. 3 and 4, the self-sealing trap 18 is formed with a convex portion 23 protruding above the base end portion 21, and is an upper portion of the inner peripheral surface of the end portion of the upstream tube body 19. In addition, a recess 24 that fits into the protrusion 23 is formed. If the upper and lower sides of the upstream pipe body 19 are specified in this way, the upper and lower sides of the self-sealing trap 18 are also specified by fitting the convex portion 23 into the concave portion 24. It is possible to suppress the occurrence of a problem that makes a mistake in the upper and lower sides. In the present embodiment, the convex portion 23 is formed on the upper portion of the base end portion 21 and the concave portion 24 is formed on the inner peripheral surface of the end portion of the upstream tube 19. The position of the recess 24 is not limited to this. The convex part 23 and the concave part 24 may be respectively formed on the side part and may be formed on the lower part. This is because the vertical direction of the self-sealing trap 18 can be specified if it is formed at positions corresponding to each other. Moreover, the recessed part 24 may be formed in the self-sealing trap 18 side, and the convex part 23 may be formed in the inner peripheral surface of the edge part of the upstream pipe body 19. FIG. Further, the position of the convex portion 23 or the concave portion 24 is not limited to the inner peripheral surface of the end portion of the upstream tube 19, and may be formed on the inner peripheral surface of the end portion of the downstream tube 20, for example.

  The self-sealing trap 18 maintains a state where the tips of the two valve bodies 22 are in close contact with each other as shown in FIG. 4A when pressure is not applied or when pressure is applied from the downstream side. , Restrict the movement of odor and other fluids upstream. On the other hand, when pressure is applied to the self-sealing trap 18 from the upstream side, as shown in FIG. 4B, pressure is applied to the inside of the two valve bodies 22 continuous from the inside of the base end portion 21, The two valve bodies 22 are elastically deformed so as to be separated from each other, and an interval through which the fluid can pass is generated between the two valve bodies 22.

  In this embodiment, the shape of the drain pipe 16 forming the horizontal flow path portion 17 is cylindrical, but for example, a drain pipe 16 formed in a polygonal cylindrical shape can be used. In this case, the shape of the base end portion 21 of the self-sealing trap 18 can also be a polygonal shape in accordance with the shape of the drain pipe 16.

  Further, the shape of the self-sealing trap 18 is not limited to this. For example, as shown in FIG. 5, the center of the pair of upper and lower valve bodies 22 of the self-sealing trap 18 swells downward so as to follow the shape of the inner peripheral surface of the drain pipe 16 that forms the horizontal flow path portion 17. It may be formed to be curved in an arc shape. When formed in this manner, the lowest position of the lower valve body 22b is close to the lowest position of the inner peripheral surface of the drain pipe 16, and the drainage flowing from the upstream side is this lower valve body 22b. It is possible to more effectively prevent staying at the upstream side of the self-sealing trap 18.

  Moreover, the shape of the self-sealing trap 18 is such that, for example, as shown in FIG. It may be formed to be curved so as to swell, and may be formed in an arc shape so that the tip becomes narrower in the downstream direction. If the pair of upper and lower valve bodies 22 are bent along the inner peripheral surface of the drain pipe 16, the lower valve body 22b is in close contact with the inner peripheral face of the drain pipe 16, and is less likely to be elastically deformed. When the valve body 22 is lifted up and the valve body 22 is separated and when the upper valve body 22a is lowered and the valve body 22 comes into contact, the side part fixed to the lower valve body 22b does not move, The valve body 22a is difficult to lift and lower. Therefore, as described above, the ends of the pair of upper and lower valve bodies 22 are formed in an arc shape so as to become narrower in the downstream direction, whereby the side portions near the ends of the pair of upper and lower valve bodies 22 are fixed to each other. Since the upper valve body 22a is not hindered from being elastically deformed, the problem of the upper valve body 22a being difficult to lift and lowering can be alleviated.

  As described above, according to the toilet drainage structure 1 of the present embodiment, it is not necessary to provide a conventional trap that stores sealed water, so that it is excellent in maintainability. In addition, the membrane-type self-sealing trap 18 uses the pressure even when a high pressure is applied to the hand-washing drainage flow path 15 in the reverse flow direction when the drainage is discharged from the western toilet 2 to the drainage pipe 10 side. Thus, the valve body 22 can be closed more firmly, so that odor and drainage can be reliably prevented from flowing back to the hand-washer 3 side. Further, even when siphon phenomenon occurs on the downstream side and the air in the handwasher drain flow path 15 is sucked, the valve elements 22 of the self-sealing trap 18 are simply separated from each other, and air is supplied from the upstream side to the downstream side. When the siphon phenomenon converges, the valve bodies 22 come into contact with each other again, so that backflow of odors from the downstream can be prevented, and there is a risk of breaking like a conventional trap in which sealed water is stored. Nor.

  And the self-sealing trap 18 is installed in the horizontal flow-path part 17 of the drainage flow path 15 for hand-washing machines, The front-end | tip which contact | abuts the valve body 22 of this self-sealing trap 18 is formed below the center of an up-down direction. Therefore, when there is drainage on the upstream side, the valve bodies 22 are likely to open apart from each other, and the drainage can be prevented from staying on the upstream side of the self-sealing trap 18. In many cases, the hand-washer 3 is installed away from the toilet bowl 2, and in such a case, a long horizontal channel portion 17 is installed in the drainage channel 15 for the hand-washer. Since there is a case where it is desired to install a trap in the flow path unit 17, the self-sealing trap 18 can be installed in an appropriate place in such a case. Moreover, since the unevenness | corrugation which mutually fits is formed in the inner peripheral surface of the drain pipe 16 which forms the horizontal flow-path part 17, and the outer surface of the self-sealing trap 18, the upper and lower sides of the self-sealing trap 18 are mistaken in the case of construction. There is no fear.

  The embodiment of the present invention is not limited to the present embodiment, and it is needless to say that the embodiment can be appropriately changed without departing from the scope of the idea of the present invention.

  As described above, the toilet drainage structure 1 according to the present invention is a toilet drainage structure 1 in which the drainage discharged from the toilet bowl and the drainage discharged from the hand basin 3 are merged downstream to flow down into sewage. Can be suitably used.

1 Toilet drainage structure 2 Western style toilet (toilet)
3 Washing Machine 11 Toilet Drain Channel 15 Hand Wash Drain Channel 17 Horizontal Channel 18 Self-sealing Trap 21 Base End 22 Valve Element 23 Convex (Convex)
24 Concave (concave)

Claims (3)

Toilet that drains wastewater discharged from a toilet bowl and drains drained from a hand-washer installed in the toilet together with a drainage channel for hand-washing that flows downstream into the toilet The drainage structure of
A toilet drainage structure in which a membrane-type self-sealing trap is formed on the drainage channel for hand-washing. The hand-washing drainage channel is such that the self-sealing trap is formed in a horizontal channel part provided substantially horizontally in a part thereof,
The self-sealing trap has a cylindrical base end portion formed on the upstream side and an elastic plate formed continuously from the base end portion on the downstream side. The toilet drainage structure according to claim 1, wherein a pair of upper and lower valve bodies in contact with each other is formed, and the valve bodies have tips that contact each other formed below the center in the vertical direction. The unevenness | corrugation which can identify the up-down direction fitted mutually is formed in the inner peripheral surface of the drain pipe which forms the said horizontal flow-path part, and the outer surface of the said self-sealing trap. Toilet drainage structure.

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