JPH0516888U - Drain pipe opening structure - Google Patents

Abstract

(57) [Abstract] [Purpose] No need for troublesome operations to open and close the lid, and there is no intrusion of rainwater or the like into the drainage pipe through the lid, and no odor or the like leaking out of the drainage pipe. Providing the opening structure of the drainage pipeline. [Arrangement] An annular shape that is compressed by the corners of the stepped portion 2 of the inner peripheral wall 1 of the main body side receiving frame a when the lid b is inserted into and placed on the main body side receiving frame a to close the opening A of the drainage pipeline. The synthetic resin lid b having the elastic seal ring 8 and the synthetic resin molding ring 7 that abuts on the lower peripheral wall portion 3 continuing below the inner peripheral wall step corner portion and guides and regulates the insertion position of the lid. A configuration characterized by having.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lid structure for an opening of a drainage pipe, such as a drainage pipe for sewage or rainwater, or a cleaning port for a drainage pipe.

[0002]

[Prior Art]

 Conventionally, in the case of an opening of a drainage pipe of this type, for example, a drainage basin, in the case of a large and heavy lid, the lid weight is used to attach it to the receiving frame on the main body side, and when the lid is opened, it is a lifting device. It was configured to use etc. And for small drainage troughs etc. used on private land, the one with the lid screwed into the receiving frame on the main body side, or the one-touch type that can be opened and closed by simply pressing and fitting the lid without using special tools etc. Things are widespread. The present invention relates to a lid structure such as a drain and a cleaning port as in the above one-touch type.

FIG. 3 is a cross-sectional view of a main part showing the structure of the cleaning port of a conventional one-touch type drainage basin, in which the opening A has a main body side receiving frame a made of vinyl chloride and a lid b also made of vinyl chloride. Is inserted and closed.

The main body side receiving frame a is continued to an upper peripheral wall portion 1 having a slight inclination for inserting a lid b, a step portion 2 supporting the lid b, and a lower peripheral wall portion 3 receiving a seal ring.

The lid b is placed on the stepped portion 2 of the body-side receiving frame a and is housed in the upper peripheral wall portion 1, and the lower surface 5 of the lid body 4 has a smaller diameter than the lid body 4. Attaching the seal ring of the cylindrical surface 6 continues.

A molded seal ring 7 made of polyethylene is mounted on the seal ring mounting cylindrical surface 6, and when the lid b is inserted into the main body side receiving frame a, the molded seal ring 7 is below the main body side receiving frame a. It is configured to contact the peripheral wall portion 3. The cross section of the molded seal ring 7 is J-shaped as shown in the figure, and it is designed to retain rainwater that has entered and prevent falling, and at the same time maintain and improve the seal elasticity.

[0007]

[Problems to be solved by the device]

 However, in the above-mentioned conventional example, although the structure is simple, the molded seal ring 7 and the lower peripheral wall portion 3 are contaminated, etc., and enter through the gap between the upper peripheral wall portion 1 of the main body side receiving frame a and the lid main body portion 4. It is difficult to completely shut off rainwater and the like with the molded seal ring 7, and there is also a problem that the odor from the drain pipe side leaks to the outside.

This invention was made in order to solve the above-mentioned problems of the prior art, does not require a troublesome operation to open and close the lid, and moreover rainwater and the like enter the drainage pipeline from the lid. The purpose is to provide an opening structure for the drainage pipeline that does not allow odors to leak outside from the drainage pipeline.

[0009]

[Means for Solving the Problems]

 Therefore, the opening structure of the drainage pipe according to the present invention is such that when the lid is inserted and placed on the main body side receiving frame and the opening of the drainage pipe is closed, the stepped corner portion of the inner peripheral wall of the main body side receiving frame is closed. Made of synthetic resin, which is attached with an annular elastic seal ring that is compressed by a synthetic resin and a synthetic resin molding ring that abuts the lower peripheral wall portion that continues below the step of the inner peripheral wall and guides and regulates the insertion position of the lid. The above-mentioned object is to be achieved by the structure characterized by including the lid.

[0010]

[Action]

 With the above configuration, when the lid is inserted and placed on the body-side receiving frame and the opening of the drainage pipe is closed, the annular elastic seal ring attached to the lid has the inner peripheral wall step corner portion of the body-side receiving frame. The synthetic resin molding ring mounted on the lid exerts an elastic sealing effect by being pressed by the bottom surface of the receiving frame on the main body side to guide and regulate the insertion position of the lid, and the lid is careless. Prevent it from opening.

[0011]

【Example】

 Hereinafter, the structure of the opening (cleaning opening) of the drainage pipe according to the present invention will be described by way of examples. FIG. 1 is a sectional view of an essential part of an embodiment of the present invention, showing a state in which a lid is inserted and placed. FIG. 2 is an enlarged cross-sectional view of the main part immediately before the lid is placed. The same or corresponding parts as those in the conventional example are designated by the same reference numerals.

The opening structure of the drainage pipe according to the present invention is configured such that the opening A is closed by inserting and placing a vinyl chloride lid b on the main body side receiving frame a made of vinyl chloride. There is.

The main body side receiving frame a is connected to an upper peripheral wall portion 1 having a slight slope for inserting a lid b, a step portion 2 supporting the lid b, and a lower peripheral wall portion 3 having a diameter smaller than that of the upper peripheral wall portion 1. ing. The diameter of the lower peripheral wall portion 3 changes midway, and the upper half portion 3a has a smaller diameter than the lower half portion 3b.

The lid b is placed on the stepped portion 2 of the main body side receiving frame a and is housed in the upper peripheral wall portion 1, and the lower surface 5 of the lid main body 4 has a smaller diameter than the lid main body 4. The engagement ring mounting circular cylinder surface 6 continues.

A groove is cut at the upper end of the molding ring mounting cylindrical surface 6 connected to the lower surface 5, and a rubber ring-shaped elastic seal ring 8 is mounted. A molding ring 7 made of polyethylene and having a J-shaped cross section is mounted on the lower half of the cylindrical surface 6 on which the molding ring is mounted. Reference numeral 9 is a rising pipe connected to the upper end of the main body (not shown) of the drainage pipe.

When the lid b having the above structure is inserted into the body-side receiving frame a, the molding ring 7 first contacts the small-diameter upper half portion 3a of the lower peripheral wall portion 3 so that the lid b is positioned at the center of the body-side receiving frame a. Then, the molding ring 7 advances to the lower half portion 3b of the lower peripheral wall portion 3 and expands in diameter with the insertion of the lid b, and keeps contact with the lower half portion 3b.

When the lid b is placed, the elastic seal ring 8 is compressed by the corner portion where the step portion 2 and the lower peripheral wall portion 3 in the main body side receiving frame a intersect, and the main body side receiving frame a is covered with the lid b. To completely seal and seal. The cross-sectional shape of the elastic seal ring 8 is a quadrangle whose surface compressed by the corners of the main body side receiving frame a is slanted as shown in FIG. It is not limited to the shape of.

With the above-mentioned configuration, the elastic seal ring 8 tends to leak rainwater or the like that enters from the gap between the upper peripheral wall portion 1 of the main body side receiving frame a and the lid main body portion 4 or the drain pipe line to the outside. Odor can be completely prevented. Further, the molding ring 7 allows the lid b to be correctly positioned at the center of the main body side receiving frame a, and the sealing action is also increased. Further, the diameter of the lower peripheral wall portion 3 of the main body side receiving frame a changes in the middle, the upper half portion 3a has a smaller diameter than the lower half portion 3b, and the elasticity of the molding ring 7 causes the lid b to open carelessly. Can be prevented. In addition, opening and closing the lid does not require a troublesome operation.

[0019]

[Effect of the device]

 As described above, according to the present invention, when the lid is inserted into and placed on the body-side receiving frame and the opening of the drainage pipe is closed, the annular elastic seal ring attached to the lid has the body-side receiving frame. It exhibits elastic sealing effect by being compressed by the stepped corners of the inner peripheral wall of the, and the synthetic resin molding ring attached to the lid contacts the lower peripheral wall of the main frame to guide and regulate the insertion position of the lid. And prevent the lid from opening accidentally.

That is, it is not necessary to open and close the lid to perform a troublesome operation, and moreover, rainwater or the like does not enter the drainage pipe through the lid, and the drainage pipe does not leak odor or the like to the outside. An opening structure can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment.

FIG. 2 is an enlarged cross-sectional view of an essential part of one embodiment.

FIG. 3 is a sectional view of a main part of a conventional drainage system.

[Explanation of symbols]

 A Opening a Main body side receiving frame b Lid 1 Upper peripheral wall 2 Stepped portion 3 Lower stepped portion 4 Lid body 5 Lower surface 6 Molding ring mounting cylindrical surface 7 Molding ring 8 Elastic seal ring

Claims (1)

[Scope of utility model registration request] 1. An annular elastic seal ring which is compressed by an inner peripheral wall step corner portion of a main body side receiving frame when a lid is inserted into and placed on the main body side receiving frame to close an opening of a drainage pipeline. A drainage pipe comprising a synthetic resin lid equipped with a synthetic resin molding ring that abuts a lower peripheral wall portion that continues below the inner peripheral wall step corner portion and guides and regulates the insertion position of the lid. Opening structure.