JP5499284B2 - Self-sealing trap - Google Patents

Description

  The present invention relates to a self-sealing trap for drainage piping, and more particularly to a self-sealing trap intended to improve the functionality of a self-sealing trap.

  Conventionally, there are various household appliances that generate wastewater by use, such as washing machine waterproof pans, bathrooms, washstands, sinks, etc. (hereinafter, equipment that generates wastewater by such use is called “drainage equipment”). Are known. These drainage devices are usually provided with drainage piping in order to treat wastewater generated by use to the sewage side. These drainage pipes are used by changing the pipe structure as needed.

  By the way, since the wastewater is usually discharged to the sewage side, simply connecting the drainage outlet, which is the drainage inlet of the drainage equipment, directly to the sewage with the drainage pipe, odors and pests flow backward from the sewage side, It will enter the indoor side from the drain. In order to prevent this, a member called a drain trap that prevents backflow of odors and pests is disposed in the drain pipe. As this drain trap, for example, there is a sealed trap with a trap function to prevent back flow of odors and pests by providing a drainage reservoir called sealed water inside and sealing the drainage flow path. It is common. However, since this sealed trap uses water drainage to seal water, there is a problem that causes a phenomenon called breakage that causes the seal water to evaporate and lose the trap function unless drainage equipment is used for a long time. is there.

Therefore, a drain trap called a self-sealing trap that does not use drainage has been proposed.
The example shown in FIG. 5 is an example of this. The drain pipe is made of a flexible material having a substantially cylindrical shape, and the opposing surfaces of the intermediate portion of the cylindrical body are inclined. Thus, the self-sealing trap is configured such that one end of the cylindrical body is open and the inner surfaces of the other end are in contact with each other, and the cylindrical body is closed when no load is applied when drainage does not flow inside.
When using this self-sealing trap, the circular end of the self-sealing trap is connected to the end of the drain pipe from the drain outlet in the drain pipe, and the downstream side is piped toward the sewage side.

In the state where drainage equipment is not used and drainage does not occur, the closed end side (hereinafter referred to as “downstream side”) of the self-sealing trap is closed, so that backflow of odors and pests is prevented. For this reason, odors and pests do not enter from the sewage on the downstream side to the indoor side.
In addition, when drainage equipment is used and drainage flows into the drainage outlet, drainage flows from the upper circular opening (hereinafter referred to as the “upstream side”) of the self-sealing trap, the drainage collects inside, and the weight of the water Due to the water pressure generated by the load, the downstream end with elasticity is opened so that it can be pushed open, and the drainage is discharged from the inside. And no backflow of pests). When the drainage equipment has been used and the drainage inside the self-contained trap has sufficiently flowed out, the downstream end is closed again by elasticity, returning to a state where odors and pests are prevented from flowing back. No odor or pest invasion occurs.
Since the downstream end is only in either the closed state or the drained state, odors and pests are prevented from entering the indoor side from the sewage side, and the trap function effect by the self-sealing trap can be obtained. it can.

JP-A-11-172736

However, the above conventional example has the following problems.
As described above, since the self-sealing traps are in contact with each other and the openings face each other, the opening is closed. However, slight distortion caused by subtle shrinkage or the like caused by heat or the like during molding is unavoidable, and accurate matching / contact is difficult. Further, since the downstream end is configured to make the cylindrical body flat and contact, the bottom view of the self-sealing trap, as shown in FIG. An opening portion with a small arc that does not inevitably come into contact is formed in the folded portion of the substantially O-shape that becomes the both ends of the abutting surface and is deformed into a flat shape, and an odor reverse flow is generated from this portion. It was. In addition, when the drainage reaches the final stage, the lower end opening is closed due to a decrease in water pressure due to the weight of the water being reduced, even if some drainage remains inside. From the opening due to the distortion of the contact surface and the small opening S due to the small arcs at both ends of the contact surface, the drainage water remaining inside may spill and drop, resulting in the noise of “potapota”.
In order to solve this, Japanese Utility Model Publication No. 60-24788 and the like improve the abutment performance by bending the downstream side end portion into an arc shape when viewed from the side as in the conventional example shown in FIG. Self-sealing traps have been proposed to prevent backflow, but this structure has made it easier to prevent backflow of odors and water leakage during small amounts of drainage. The trap must have enough water to enter the trap, and the arc shape must be linear due to its weight. Even if the drainage flows, the drainage does not start until the arc reaches a straight line. If the amount of drainage is not sufficient, There was a problem that the responsiveness when draining the wastewater was not good, such as remaining in the water.
The present invention has been devised in view of the above problems, and provides a self-sealing trap having high sealing performance when no load is applied and having good responsiveness of an opening during drainage.

The present invention according to claim 1 is made of a material having flexibility in a substantially cylindrical shape,
By providing an inclination between the opposing surfaces of the intermediate part of the cylinder,
A self-sealing trap that treats the drainage of drainage equipment that is configured so that one end of the cylindrical body is open and the inner surfaces of the other ends are in contact with each other and the cylindrical body is closed when there is no load,
The self-sealing trap is characterized in that, by providing a concave groove on the surface of the cylindrical body, a protrusion that contacts the opposite surface is provided on the inner surface of the cylindrical body .

  The present invention described in claim 2 is characterized in that the protrusion is provided in the vicinity of the closed end portion of the cylindrical body along the closed end portion. It is a trap.

  The present invention according to claim 3 is the self-sealing trap according to paragraph 0008, wherein the protrusion is provided in the vicinity of the side end of the inclined surface 6 along the axial direction of the cylindrical body. is there.

  In the self-sealing trap, the downstream end portion of the folded portion 3 provided along the axial direction is bonded to the self-sealing trap in a state where the opposing surfaces in the vicinity of the folded portion 3 are in contact with each other. The self-sealing trap according to any one of paragraphs 0008 to 0010, wherein

  In the present invention according to claim 5, the self-sealing trap is made of a rubber material, and after the primary vulcanization of the self-sealing trap, the protrusion has a groove on the surface of the self-sealing trap before secondary vulcanization. The self-sealing trap according to any one of paragraphs 0008 to 0011, wherein the self-sealing trap is formed by providing a protrusion on the inner surface.

In the first aspect of the present invention, since the protrusion is provided on the inner surface of the cylindrical body and the contact is made by the protrusion, even if some distortion occurs on the contact surface, the protrusion portion Since it strongly abuts against the opposite surface, airtightness and watertightness can be secured without hindrance, and odor backflow and water leakage can be prevented. Further, since the tip does not form a side-view circular arc shape as shown in FIG. 7, it can be easily opened even with a small amount of drainage, and the responsiveness to the opening to drainage is improved compared to the conventional example of FIG. .
In the present invention according to claim 2, by providing the protrusion along the downstream end portion to be closed, the air tightness with respect to the end portion on the downstream side to be particularly closed can be increased. .
In this invention of Claim 3, the contact property of the axial direction both ends of a cylinder improves by providing the said protrusion in the axial direction vicinity of a cylindrical body along the axial direction of a cylinder, Airtightness increases, and it is possible to make it difficult for odor backflow from the end portion to occur.
In the present invention according to claim 4, the downstream end of the bent portion provided along the axial direction is bonded in a state in which a part of the opposing surfaces including the bent end is in contact with each other. The contact property of both ends in the axial direction of the cylinder is improved, airtightness is increased, and odor backflow and water leakage from the end can be made difficult to occur.
In this invention of Claim 5, one of the manufacturing methods of the said protrusion can be clarified.

It is a front view of the self-sealing trap of this invention. It is sectional drawing of the side surface direction of the Example of FIG. FIG. 2 is a bottom view of the embodiment of FIG. 1 with a lower end closed. It is a bottom view of the state of the Example of FIG. 1 in the state which the lower end opened. It is sectional drawing of the side surface direction of the conventional self-sealing trap. FIG. 6 is a bottom view of the conventional example of FIG. 5 with the lower end closed. It is sectional drawing of the side surface direction of another conventional self-sealing trap.

Embodiments of the present invention will be described below with reference to the drawings.
The self-sealing trap 1 according to the embodiment of the present invention shown in FIGS. 1 to 4 is made of a silicon rubber material that is a rubber material, and is configured to have flexibility as a whole.
The shape is substantially cylindrical, and by providing an inclination between the opposing surfaces of the intermediate part of the cylindrical part, one end of the cylinder opens and the inner surfaces of the other end come into contact with each other. It is comprised so that a cylinder may be obstruct | occluded. Hereinafter, in accordance with the mode of piping, the end portion that remains open is the upstream side, and the other end portion that is normally closed and opened at the time of draining is the downstream side.
In the self-sealing trap 1 of this embodiment, as is apparent from FIG. 1 and the like, on the inner surface side of the inclined surface of the self-sealing trap 1 and on one of the opposed inclined surface 6 and the continuous lower surface, In the vicinity of the downstream end 5, the lower end protrusion 2 a that is a protrusion along the downstream end 5 is also a protrusion 2 near both ends of the inclined surface along the axial direction of the cylindrical body. Each side ridge 2b of the book is provided.
When the self-sealing trap 1 is molded by heating and vulcanizing the rubber material from the rubber material, after forming a rough shape such as a cylindrical shape or a closed structure of the downstream end portion 5 by the inclined surface 6 by primary vulcanization. Before the secondary vulcanization, a concave groove is provided on the surface of the self-sealing trap 1, and a protrusion is projected on the inner surface by the concave groove, and then the secondary vulcanization is performed.
For this reason, a concave groove is formed on the surface side of the self-sealing trap 1 at a position corresponding to the protrusion on the inner surface.
In addition, such arrangement | positioning of a protrusion is on the lower end side protrusion 2a or the side side protrusion 2b by a front view, until most of the waste_water | drain from the upstream opening 7 reaches the downstream end part 5. FIG. It is arranged for the purpose of passing through.
Further, the closed portion of the downstream end portion 5 of this embodiment has a substantially O-shaped flat shape as shown in FIG. 3 when viewed from the bottom of the self-sealing trap 1 (viewed in the direction of arrow A in FIG. 1). From the substantially O-shaped folded portion 3 deformed into a flat shape to the portion reaching the side ridge 2b, the opposing surfaces are bonded to each other by heat fusion. .

  The self-sealing trap 1 described above is arranged and piped so that the upstream opening is connected to a pipe P to which a trap function is to be added, and the downstream end 5 is opened toward a discharge side pipe such as a sewage side pipe. This completes the construction of the drainage pipe.

In the self-sealing trap 1 configured as described above and the drainage pipe in which the self-sealing trap 1 is constructed, first, drainage does not occur in the drainage pipe, and the lower end of the self-sealing trap 1 is closed (such as gravity or drainage). First, the case of an unweighted state in which the pressure of the wastewater flow does not act will be described. In the unweighted state, as described in paragraph 0015, the inner surface of the inclined surface 6 of the self-sealing trap 1 has a lower end protrusion 2a along the end in the vicinity of the downstream end 5 of the cylindrical body. Further, along the axial direction of the cylindrical body, two side ridges 2b are respectively provided in the vicinity of both side ends of the inclined surface. The side surface protrusion 2b is formed by the inclined surface 6 and the lower portion thereof in contact with the opposing surfaces. Since the protrusion protrudes toward the opposing surface side, the force concentrates more than when the surfaces simply contact each other, the contact pressure is strong, the contact is made in a line contact state, and the conventional self-sealing trap 1 by the surface contact is used. Compared with high airtightness. In addition, this strong pressure can ensure airtightness and watertightness without any problems even if there is some distortion on the opposing contact surfaces.
In addition, the self-sealing trap 1 shown in FIG. 1 is the surface side of the self-sealing trap 1, and the ditch | groove corresponding to a protrusion is shown. Here, the groove corresponding to the lower side protrusion 2a is defined as the lower end side groove 4a, and the groove corresponding to the side protrusion 2b is defined as the side groove 4b. The ridges are provided on the inner surface side. In the said Example, the airtight property and the water-tightness of the downstream end part 5 vicinity of the downstream end part 5 of the downstream side edge 5 by the lower end side protrusion 2a are improved, respectively.
Further, the closed portion of the downstream end portion 5 of this embodiment has a substantially O-shaped flat shape as shown in FIG. 3 when viewed from the bottom of the self-sealing trap 1 (viewed in the direction of arrow A in FIG. 1). Since the opposing surfaces in the vicinity of the folded portion of the substantially O-shape that has been deformed into a flat shape are bonded to each other by fusion by heat, it is substantially similar to the conventional self-sealing trap 1. Since a small opening due to an arc does not occur in the folded portion of the O-shape, the airtightness and watertightness are further improved as compared with the conventional example.
In this way, in the unweighted state where gravity such as drainage or pressure of the drainage flow does not act, the lower end of the self-sealing trap 1 is blocked, and odors and pests from downstream sewage etc. flow backward to the indoor side. It never happens.

  Next, even when a small amount of drainage is generated in the drain pipe, if the amount is not so large that the downstream end 5 is opened, the downstream end 5 is maintained in a closed state. In this case, the watertightness is also improved by each device for improving the airtightness described in the paragraph 0017, and a phenomenon that water drops spill from the downstream end portion 5 does not occur.

  Next, when a large amount of drainage is generated to open the downstream end 5 in the drainage pipe, the downstream end 5 closed by the water pressure of the drainage accumulated in the self-sealing trap 1 is shown in FIG. The internal drainage is discharged. Even in this case, in the embodiment of the present invention, as in the conventional example of FIG. 7, a device for improving the water tightness by limiting the flexibility, such as making the downstream end portion 5 an arc shape when viewed from the side, is used. Since this is not performed, the downstream end 5 of the self-sealing trap 1 smoothly opens following the water pressure accumulated inside, and the waste water flowing inside can be discharged downstream.

  The embodiments of the present invention are as described above. However, the present invention is not limited to the above-described embodiments, and can be freely changed without departing from the scope of the present invention. For example, in the embodiment of the present invention, the lower end protrusion 2a and the side protrusion 2b are combined and provided in the self-sealing trap 1, but the present invention is not limited to the above embodiment, for example, the lower end protrusion By providing only the strip 2a, the airtightness and watertightness can be made higher than those of the conventional self-sealing trap 1.

DESCRIPTION OF SYMBOLS 1 Self-sealing trap 2a Lower end side protrusion 2b Side side protrusion 3 Folding part 4a Lower end side groove 4b Side side groove 5 Downstream end 6 Inclined surface 7 Upstream opening P Piping S Small opening

Claims (5)

It is made of a flexible material made into a substantially cylindrical shape,
By providing an inclination between the opposing surfaces of the intermediate part of the cylinder,
A self-sealing trap that treats the drainage of drainage equipment that is configured so that one end of the cylindrical body is open and the inner surfaces of the other ends are in contact with each other and the cylindrical body is closed when there is no load,
A self-sealing trap, characterized in that, by providing a concave groove on the surface of the cylindrical body, a protrusion that contacts the opposite surface is provided on the inner surface of the cylindrical body . The above protrusion is
In the vicinity of the closed end of the cylindrical body, it is provided along the closed end,
The self-sealing trap according to claim 1. The above protrusion is
It is provided in the vicinity of the side end of the inclined surface 6 along the axial direction of the cylindrical body,
The self-sealing trap according to claim 1. In the above self-sealing trap,
The downstream end portion of the folded portion 3 provided along the axial direction is bonded together with the opposing surfaces in the vicinity of the folded portion 3 being in contact with each other.
The self-sealing trap according to any one of claims 1 to 3. The self-sealing trap is made of rubber material,
After the above ridges have primarily vulcanized the self-sealing trap 1,
Before performing secondary vulcanization, the self-sealing trap 1 is provided with a groove on the surface and is formed by projecting a ridge on the inner surface,
The self-sealing trap according to any one of claims 1 to 4.

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