JP5720014B2 - Self-sealing drain trap - Google Patents

Description

  The present invention relates to a self-sealing drain trap that prevents backflow of odors and the like from downstream without requiring sealing water, and more particularly to a self-sealing drain trap installed in a drain pipe that is piped substantially horizontally.

  For drainage pipes that communicate with drains of drainage equipment such as washing machines, washstands, sinks, bathrooms, etc., and drain the drainage from these drainage equipment into the sewer, part of the pipe is bent into a U-shape, etc. A drain trap is formed. Then, by storing a part of the drainage as sealed water in this drain trap, odors, insects, small animals, etc. that flow backward from the downstream are blocked, so that they do not enter the indoor side through the drain port.

  By the way, in such a drain trap that stores the sealed water, when the drainage equipment is not used for a long time, such as when the drainage equipment is not used for a long time, or when the waste water stays in the drain trap together with the sealed water. When the sealing water is sucked up by capillary action, the sealing water stored in the drain trap evaporates and breaks, and the function as the drain trap may not be performed. In addition, when drainage flows down the drainage pipe downstream from the drainage trap, the sealed water in the drainage trap is sucked downstream and broken due to the siphon phenomenon generated by this drainage flow. There is a possibility that the function of can not be performed.

  In addition, when the drainage pipe has a structure in which drainage paths from two or more drainage ports are merged downstream, when drainage is exhausted from one drainage port, it is provided on the other drainage port side. There is a possibility that pressure is applied to the drainage trap, and the sealed water flows backward to the other drainage port and overflows. In addition, depending on the amount of drainage from one drainage port, the sealing water on the other drainage port side may be pulled downstream and broken or when the drainage discharged from one drainage port passes through the drainage pipe May generate unpleasant noise from the other drainage port to the indoor side.

  Accordingly, various self-sealing drain traps 100 using check valves called membranes have been proposed in order to overcome the above-described problems of drain traps for storing sealed water (for example, Patent Document 1 and Patent Document 1). 2). This self-sealing drain trap 100 is formed of, for example, a resin having elasticity as shown in FIG. 7, and is formed with a tubular body 101 having an open end on the upstream side and an end on the downstream side. The portion has a shape in which the tips of a pair of valve bodies 102 that are formed so as to continuously flatten from the cylindrical body 101 and whose side portions are closed are overlapped. As a result, when no external force is applied and when pressure is applied from the downstream side, as shown in FIG. 7A, the state where the tip of the valve body 102 is overlapped is maintained, and the odor from the downstream side is maintained. When the wastewater flows in from the upstream side, as shown in FIG. 7B, the tip of the valve body 102 is separated and the wastewater can flow down to the downstream side.

JP 2010-7358 A Japanese Patent Application Laid-Open No. 2004-124531

  By the way, the self-sealing drain trap 100 installed in the drain pipe may be installed in the drain pipe laid in a substantially horizontal direction from the viewpoint of functionality and space saving. In such a case, if the pair of valve bodies 102 of the self-sealing drain trap 100 are arranged on the left and right when viewed from the tip, the left and right valve bodies 102 are more likely to open more than necessary on the lower side where the water pressure is concentrated. On the upper side, which is relatively low, the left and right valve bodies 102 are difficult to open. Therefore, the upper and lower opening balance is deteriorated, and there is a possibility that performance as designed cannot be exhibited.

  Therefore, in the case where the self-sealing drain trap 100 is installed in a substantially horizontal drain pipe, the pair of valve bodies 102 of the self-sealing drain trap 100 is arranged with one valve body 102 on the lower side and the other valve body 102 on the upper side. When arranged, the lower valve body 102 obstructs the flow of drainage, so that the drainage and a part of the foreign matter contained in the drainage stay on the upstream side of the lower valve body 102, which is unsanitary and self-sealing. There was a possibility of deteriorating the performance of the drain trap 100.

  Therefore, an object of the present invention is to provide a self-sealing drain trap that can be opened in a well-balanced manner and can suppress the retention of drainage or the like upstream thereof.

In order to achieve the above object, the self-sealing drain trap according to claim 1 is a self-sealing drain trap installed in a drain pipe piped substantially horizontally, and is formed in a tubular shape on the upstream side. A pair of upper and lower valve bodies formed in a continuous shape from the body, the cylindrical body, and the tip of which is in contact with each other, and the side surfaces of the pair of upper and lower valve bodies swelled gently A side wall body that is substantially curved and is formed so as to be smoothly constricted from the tubular body toward the tip of the valve body, and an upper and lower specific structure that specifies the vertical direction, The valve body is characterized in that its tip is positioned below the center in the vertical direction.

  The self-sealing drain trap according to claim 2 is characterized in that the upper and lower specific structure is formed in a shape that fits into a concave portion or a convex portion formed on an inner peripheral surface of the drain pipe.

  The self-sealing drain trap according to claim 3 is characterized in that the upper and lower specific structure is a rib formed to extend upward from an upper valve body of the pair of valve bodies.

  The self-sealing drain trap according to claim 4, wherein the drain pipe is a cylindrical pipe, and the pair of valve bodies are formed to bulge downward along an inner peripheral surface of the drain pipe. Yes.

  The self-sealing drain trap according to claim 5 is characterized in that the pair of valve bodies are formed to be tapered in the distal direction.

  According to the self-sealing drain trap according to claim 1, since the tip of the pair of valve bodies is formed so as to be located below the center in the vertical direction of the self-sealing drain trap, the lower valve body is drained. Hindering the flow of water, and it is possible to suppress the sewage and a part of the foreign matter contained in the sewage from staying upstream of the lower valve body. Moreover, since this self-sealing drain trap has a vertical specifying structure that specifies the vertical direction, it is possible to prevent the vertical direction from being erroneously attached when the self-sealing drain trap is attached to the drain pipe.

  According to the self-sealing drain trap according to claim 2, when the self-sealing drain trap is mounted, the upper and lower specific structure is formed in a shape that fits into a concave portion or a convex portion formed on the inner peripheral surface of the drain pipe. Naturally, a self-sealing drain trap can be installed in the correct vertical direction.

  According to the self-sealing drain trap according to claim 3, since the upper and lower specific structure is a rib formed extending upward from the upper valve body among the pair of valve bodies, the self-sealing type is the same as in claim 2. When the drain trap is attached, the self-sealing drain trap can be attached in the correct vertical direction, and the upper valve element can be reinforced by the ribs, so that the valve element can be prevented from being unnecessarily deformed by an external force.

  According to the self-sealing drain trap according to claim 4, the drain pipe is a cylindrical pipe, and the pair of valve bodies are formed to bulge downward along the inner peripheral surface of the drain pipe. The lowest position of the lower valve body is close to the lowest position of the inner peripheral surface of the drainage pipe, and the drainage flowing from the upstream side is blocked by the lower valve body, so that self-sealing drainage It is possible to more effectively prevent staying at the upstream side of the trap.

  According to the self-sealing drain trap according to claim 5, since the pair of valve bodies are tapered toward the distal direction, the pair of valve bodies are curved along the inner peripheral surface of the drain pipe. In this case, the problem that the upper valve body is difficult to elastically deform can be alleviated. That is, the lower valve body is intimately contacted with the inner peripheral surface of the drainage pipe and is not easily elastically deformed. When the upper valve body is lifted and the valve body is separated, the upper valve body is lowered and the valve body comes into contact. At this time, since the side part fixed to the lower valve body does not move, the upper valve body is difficult to lift and lower, but the tips of the pair of valve bodies taper toward the downstream direction. Because it is formed, the side parts near the tip of the pair of valve bodies are not fixed to each other, so the elastic deformation of the upper valve body is not hindered and the upper valve body is difficult to lift and fall can do.

(A) is the front view which shows the external appearance structure of the self-sealing drain trap of this embodiment, (B) is a left view, (C) is a rear view, (D) is sectional drawing seen from the right side. The figure explaining the operation | work which attaches a self-sealing drain trap between the upstream pipe body and downstream pipe body which comprise drainage piping. (A) is a diagram showing the action of the self-sealing drain trap when odors flow backward from the downstream to the upstream when a self-sealing drain trap is attached to the drain pipe, and (B) is the drainage from the upstream The figure which shows the effect | action of a self-sealing drain trap. A front view, a side view, and a perspective view illustrating a self-sealing drain trap in which a valve body is formed by bending in a circular arc shape whose center swells downward along the shape of an inner peripheral surface of a tubular body. A self-sealing drain trap formed in a curved shape so that the center swells downward along the shape of the inner peripheral surface of the tube body and in a circular arc shape so that the tip becomes narrower in the downstream direction. The top view and perspective view explaining. Front view for explaining a self-sealing drain trap in which a rib as a specific structure is formed upward from the upper valve body, a side view, and a cross section viewed from the front in a state where the self-sealing drain trap is attached to the pipe body Figure. The figure which shows operation | movement of the conventional self-sealing drain trap.

  Hereinafter, the best embodiment of the self-sealing drain trap 1 of the present invention will be described with reference to the drawings. The self-sealing drain trap 1 in the present embodiment is not shown, but is connected to drains of drainage devices such as washing machines, washstands, sinks, bathrooms, etc., and drains that drain wastewater discharged from these drainage devices to the sewer. It is installed in the drainage pipe 2 formed substantially horizontally on the path of the pipe 2. As shown in FIG. 1, the self-sealing drain trap 1 includes a cylindrical body 10 formed in a cylindrical shape, a pair of valve bodies 11 formed continuously from the cylindrical body 10, and tips of which are in contact with each other, The upper and lower specific structure 12 provided in the upper part of the outer peripheral surface of the cylindrical body 10 is formed of an elastic resin.

  The cylindrical body 10 is formed in a cylindrical shape whose outer diameter is substantially equal to the inner diameter of the drainage pipe 2. In addition, the shape of the cylindrical body 10 of the present invention is not limited to a cylindrical shape, and may be a polygonal cylindrical shape according to the cross-sectional shape of the drainage pipe 2. Of the pair of valve bodies 11, the upper valve body 11 a is formed to be inclined downward from the upper part of the cylindrical body 10 toward the distal end, and the vicinity of the cylindrical body 10 has a steep slope. It is formed to be curved so as to approach the horizontal as it approaches the tip. Further, the lower valve body 11b is formed so as to be inclined upward from the lower part of the cylindrical body 10 toward the distal end with a gentle inclination compared to the upper valve body 11a, and the vicinity of the cylindrical body 10 is formed. It has a steep slope and is curved so as to approach the horizontal as it approaches the tip. The upper valve body 11a and the lower valve body 11b are formed such that the side portions are closed by the side wall body 13. The upper valve body 11a and the lower valve body 11b are in contact with each other with no external force applied. Further, the width of the pair of valve bodies 11 is formed so as to be closer to the distal end, and the distal ends of the pair of valve bodies 11 are located below the center of the cylindrical body 10. The upper and lower specific structure 12 is a rectangular parallelepiped integrally formed so as to protrude from the upper part of the cylindrical body 10, and is fitted to the fitting portion 20 formed on the inner peripheral surface of the drain pipe 2.

  The upper and lower specific structure 12 of the present invention is not limited to a rectangular parallelepiped protrusion. For example, a worker who attaches the self-sealing drain trap 1 such as the shape, color, pattern, or character of protrusions and grooves formed on the cylindrical body 10 or the pair of valve bodies 11 recognizes the vertical direction of the self-sealing drain trap 1. Anything that can be done. In this way, the installation operator of the self-sealing drain trap 1 recognizes the vertical direction of the self-sealing drain trap 1, so that when the self-sealing drain trap 1 is attached to the drain pipe 2, it is possible to prevent incorrect mounting in the vertical direction. it can.

  The drainage pipe 2 for mounting the self-sealing drain trap 1 is formed by connecting a plurality of drainage pipes 2 such as straight pipes and elbow pipes to form a drainage flow path through which drainage flows, and at least a part thereof is substantially omitted. Piped horizontally. The mounting position of the self-sealing drain trap 1 is preferably a position where the drain pipe 2 is piped substantially horizontally, and is a position where the upstream pipe body 2a and the downstream pipe body 2b are connected. A recessed fitting portion 20 is formed on the inner peripheral surface of the downstream end of the upstream tubular body 2a so as to be fitted to the upper and lower specific structure 12 of the self-sealing drain trap 1. When the self-sealing drain trap 1 is attached, as shown in FIG. 2 (A), the connection between the upstream pipe 2a and the downstream pipe 2b is released. And as shown in FIG.2 (B), the self-sealing drain trap 1 is attached to the edge part of the upstream pipe body 2a. Specifically, the cylindrical body 10 of the self-sealing drain trap 1 is inserted toward the end of the upstream pipe 2a. At this time, the upper and lower specific structure 12 that is integrally formed so as to protrude to the upper part of the outer peripheral surface of the cylindrical body 10 is fitted to the fitting portion 20 that is formed on the inner peripheral surface of the end of the upstream tube 2a. And fix. And as shown in FIG.2 (C), the downstream pipe 2b is externally fitted and connected to the upstream pipe 2a to which the upper and lower specific structure 12 is attached, and the mounting operation of the self-sealing drain trap 1 is completed. As described above, by attaching the self-sealing drain trap 1 by fitting the upper / lower specific structure 12 to the fitting portion 20, it is possible to reliably prevent the self-sealing drain trap 1 from being mistaken in the vertical direction.

  When the upper and lower specific structure 12 is replaced by a notch or groove formed in a part of the cylindrical body instead of a rectangular parallelepiped projection, a fitting portion formed on the inner peripheral surface of the upstream side tubular body 2a By projecting to the inner peripheral side and forming a projection that fits into a notch or groove formed in the cylindrical body, it is possible to reliably prevent the self-sealing drain trap 1 from being mistaken in the vertical direction as described above.

  As shown in FIG. 3 (A), the drainage pipe 2 to which the self-sealing drain trap 1 is attached in this way allows odors, pests, small animals, etc. from entering the upstream side by the closed valve body 11. Can be prevented. In particular, when pressure is applied from the downstream side, the pressure is applied to the surface exposed to the downstream side of the pair of valve bodies 11, thereby bringing the pair of valve bodies 11 closer together. Even when the drainage flows backward, the self-sealing drain trap 1 can surely stop the drainage of the drainage.

  Further, when drainage flows from the upstream side, the tips of the pair of valve bodies 11 are separated from each other to form a gap, and the drainage can flow downstream by passing through the gap. In particular, since the tips of the pair of valve bodies 11 are located below the center of the cylindrical body 10, the lower valve body 11b can be prevented from obstructing the flow of drainage, and self-sealing drainage. It is possible to suppress the drainage from staying upstream of the trap 1 as much as possible.

  The shape of the self-sealing drain trap 1 is not limited to that of the present embodiment, and various shapes of the self-sealing drain trap 1 can be used as the self-sealing drain trap 1 of the present invention. For example, as shown in FIG. 4, the shape of the pair of valve bodies 11 of the self-sealing drain trap 1 is formed by curving into an arc shape whose center swells downward along the shape of the inner peripheral surface of the drain pipe 2. May be. If formed in this way, the lowest position of the lower valve body 11b will be close to the lowest position on the inner peripheral surface of the drainage pipe 2, and the drainage that has flowed from the upstream side will become the lower valve body 11b. It is possible to more effectively prevent staying at the upstream side of the self-sealing drain trap 1.

  Further, the shape of the self-sealing drain trap 1 is, for example, as shown in FIG. 5, formed by curving so that the center of the pair of valve bodies 11 swells downward along the shape of the inner peripheral surface of the drain pipe 2. In addition, it may be formed in an arc shape so that the tip becomes narrower in the downstream direction. When the pair of valve bodies 11 are curved along the inner peripheral surface of the drainage pipe 2, the lower valve body 11b is in close contact with the inner peripheral surface of the drainage pipe 2 and hardly elastically deforms, and the upper valve body 11a. When the valve body 11 is lifted and the valve bodies 11 are separated from each other and when the upper valve body 11a is lowered and the valve bodies 11 come into contact with each other, the side wall body 13 fixed to the lower valve body 11b does not move. The upper valve body 11a is difficult to lift and lower. Therefore, as described above, the distal ends of the pair of valve bodies 11 are formed in an arc shape so as to become narrower in the downstream direction, so that the distal ends of the pair of valve bodies 11 formed in the arc shape have sidewalls. Since the body 13 is not formed, the elastic deformation of the upper valve body 11a is not hindered, and it is possible to alleviate the problem that the upper valve body 11a is difficult to lift and fall.

  For example, as shown in FIG. 6, the upper and lower specific structure 12 may be a rib 12 a formed to extend upward from the upper valve body 11 a. That is, a rib 12a formed like a wall is formed within a predetermined range from the tubular body 10 side of the upper valve body 11a, and a rib is formed on the inner peripheral surface of the drain pipe 2 to which the self-sealing drain trap 1 is attached. The groove-shaped fitting part 20 which pinches | interposes the upper end of 12a may be formed. If comprised in this way, by fitting the upper end of the rib 12a to the fitting part 20, it can prevent inevitably making a mistake in the up-and-down direction of the self-sealing drain trap 1, and by providing the rib 12a Since the upper valve body 11a can be prevented from elastically deforming into an unexpected shape, the self-sealing drain trap 1 can exhibit the performance as planned.

  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 self-sealing drain trap 1 according to the present invention can be suitably used as a drain trap attached to a drain pipe 2 that is horizontally piped.

DESCRIPTION OF SYMBOLS 1 Self-sealing drain trap 2 Drain piping 10 Tubular body 11 Valve body 12 Vertical specific structure 20 Fitting part 12a Rib

Claims (5)

It is a self-sealing drain trap installed in a drain pipe piped approximately horizontally,
A cylindrical body formed on the upstream side;
A pair of upper and lower valve bodies formed continuously from the cylindrical body and formed into an elastic plate whose tips abut each other;
A side wall body that has a substantially curved shape that gently swells so as to close the side surfaces of the pair of upper and lower valve bodies, and that is formed so as to be smoothly constricted from the cylindrical body toward the tip of the valve body;
And a vertical identification structure that identifies the vertical direction,
The self-sealing drain trap, wherein the pair of valve bodies are formed such that their tips are located below the center in the vertical direction.   The self-sealing drain trap according to claim 1, wherein the upper and lower specific structure is formed in a shape that fits into a fitting portion formed on an inner peripheral surface of the drain pipe.   The self-sealing drain trap according to claim 2, wherein the upper and lower specific structure is a rib formed to extend upward from an upper valve body of the pair of valve bodies.   4. The drain pipe according to claim 1, wherein the drain pipe is a cylindrical pipe, and the pair of valve bodies are formed to bulge downward along an inner peripheral surface of the drain pipe. Self-sealing drain trap as described.   5. The self-sealing drain trap according to claim 4, wherein the pair of valve bodies are tapered toward a distal direction.

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