JPH0756384Y2 - Cleaning device for drainage pipe - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Industrial field of application) The present invention relates to a drainage pipe cleaning device for cleaning or inspecting a drainage pipe, and is particularly installed in a place where concrete is poured. Regarding what is done.

(Prior Art) A drainage pipe in a drainage pipe installed in a residential land is provided with a cleaning port for cleaning or inspection, and the cleaning port is closed by a lid so as to be openable and closable. It has become.

Conventionally, drainage basins installed in residential areas are made of concrete or polypropylene, and the diameter of the cleaning port lid is 300 m.
It was m. However, recently, a large number of small-sized vinyl chloride resin drainage basins called invert basins have come to be used in order to prevent intrusion of unknown water or to save space. The cleaning port of this invert basin has a diameter of 100 or 150 mm, and there are various lid structures for closing the cleaning port.

As such a cleaning port device, the one described in Japanese Utility Model Laid-Open No. 63-41649 is conventionally known.
In the cleaning port device described in this publication, a lid receiving part is formed in a stepped shape on the inner peripheral side of the upper opening end of a cleaning port body formed of a synthetic resin in a cylindrical shape, and the lid receiving part is composited. A disk-shaped lid body is detachably fitted with a resin. In order to prevent sand or soil from entering, the structure is such that the diameter of the lid body receiving portion of the cleaning port body and the diameter of the lid body are almost equal to each other. Almost no gap is formed between the outer peripheral surface. This structure is not limited to the cleaning port device described in the above publication, but is generally conventional. For deodorization, for example, a rubber O-ring, which is pressed against the lid body receiving portion of the cleaning port body, is fitted to the lid body. The O ring is the inner peripheral surface of the lid body receiving portion. Is arranged at a position one step lower than the flange on the upper surface of the lid, which is in contact with the inner peripheral side.

By the way, the drainage basin as described above is usually installed on the back side of a building, but is also installed on a place such as a parking lot where concrete is struck. However, recently, as the material of the cleaning port main body and the lid is mostly synthetic resin, especially vinyl chloride resin as described above, when the outer peripheral side of the cleaning port body is hit with concrete, the following problems occur. It was happening.

That is, in summer when the temperature rises, the cleaning mouth body and lid made of synthetic resin try to expand, but especially the outer peripheral surface of the cleaning mouth body is held in contact with hard concrete, so the cleaning mouth is The main body is prevented from expanding, and only the lid body expands. As a result, the fitting between the main body of the cleaning opening and the lid may become tight, and opening and closing of the lid may be difficult.

(Problems to be Solved by the Invention) As described above, in the conventional drain pipe cleaning port device in which the cleaning port body and the lid body are made of synthetic resin, the lid body receiving portion and the lid body on the inner peripheral side of the cleaning port body are provided. Since and had the same diameter, there was a problem that when concrete was struck on the outer peripheral side of the cleaning port body, opening and closing of the lid might be difficult in the summer and the like.

The present invention is intended to solve such a problem, and in the case where concrete is struck on the outer peripheral side of the synthetic resin cleaning port body in which the synthetic resin lid is fitted on the inner peripheral side. Even if it exists, it is an object of the present invention to provide a drain port cleaning port device that can always open and close the lid and prevent sand or soil from entering between the cover and the cleaning port body.

[Constitution of device]

(Means for Solving the Problem) In order to achieve the above object, the present invention provides a cleaning port main body made of a synthetic resin and formed in a cylindrical shape having a lid receiving portion on the inner peripheral side of an opening end, A lid body made of a synthetic resin that is detachably fitted to the lid body receiving portion of the cleaning port body to openably close the opening end, and the lid body and the lid body receiving portion of the cleaning port body relative to each other. In a drainage pipe cleaning device provided with, for example, a rubber ring body having elasticity that is provided on at least one of the facing surfaces and is press-contacted to the other surface, a peripheral surface of the lid and the cleaning body A relatively large gap is formed over the entire inner peripheral surface of the lid receiving portion, and an elastic material interposed in the gap is integrally formed with the ring body.

(Operation) In the drainage port cleaning device of the present invention, the lid body is normally fitted to the lid receiving portion on the inner peripheral side of the cleaning port body to close the opening end of the cleaning port body. At this time, the elastic ring body provided on at least one of the surfaces of the lid body and the lid body receiving portion facing each other is pressed against the other side, so that intrusion of rainwater and leakage of malodor are prevented. When cleaning or inspecting the drain pipe, the lid is removed from the lid receiving portion to open the opening end of the cleaning port body. By the way, when concrete is struck on the outer peripheral side of the cleaning port main body, when the temperature rises in summer or the like, the lid body expands, but the cleaning port main body is pressed by the concrete and expansion is prevented. At this time, the elastic material interposed in the entire gap between the outer peripheral surface of the lid body and the inner peripheral surface of the lid body receiving portion of the cleaning port body is pushed and elastically contracted by the expanded lid body. .
The presence of the gap prevents the lid body from being tightly fitted to the cleaning port body and prevents the lid body from being difficult to open and close. Moreover, the elastic material interposed in the gap prevents clogging of sand or soil between the lid and the cleaning port body.

(Embodiment) Hereinafter, the construction of an embodiment of the cleaning device for a drain pipe of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a connection port for a drainage basin in a drainage pipe buried in the ground, and the connection port 1 has a cylindrical shape with open upper and lower end surfaces. In addition, 2 is concrete hit on the ground surface.

Reference numeral 11 denotes a cleaning port body, which is made of synthetic resin such as vinyl chloride resin and is integrally formed into a substantially cylindrical shape with its upper and lower end surfaces opened. And this cleaning body 11
A lid receiving portion 12 is formed on the inner peripheral side over the entire circumference at the upper open end of the, and a flange 13 is formed on the outer peripheral side. An annular fitting step portion 14 is formed on the inner peripheral side of the flange 13. This fitting step portion 14 is
It forms an upper part of the lid receiving portion 12, has a horizontal bottom surface and an inner peripheral surface rising from the outer peripheral edge of the bottom surface, and has a substantially L-shaped cross section. Also, this mating step
A plurality of engaging protrusions 15 arranged in the circumferential direction are formed on the inner peripheral surface of the cleaning port main body 11 adjacent to the lower part of the cleaning port main body 11. These engaging ridges 15 are respectively inclined in the same direction,
It has a threaded shape as a whole, and has stepped locking portions (not shown) facing the same direction on the lower surface.

Reference numeral 21 is a lid, and the lid 21 is integrally molded of a synthetic resin such as acrylonitrile / butadiene / styrene resin into a substantially disc shape.
It is removably fitted into the inside of the cleaning port body 11 so as to openably and closably close the upper opening end of the cleaning port body 11. Further, the lid body 21 has a flange 22 fitted on the fitting step portion 14 of the cleaning port main body 11 on the upper surface portion, and this flange 21
The portion below 22 is the lid receiving portion 12 of the cleaning port body 11.
It is a cylindrical portion 23 inserted in the lower part of the.

The outer diameter of the lid body 21 is generally the same as that of the cleaning port body.
It is smaller than the inner diameter of the lid receiving portion 12 of 11 and has a relatively large gap 24 between the outer peripheral surface of the lid 21 and the inner peripheral surface of the lid receiving portion 12 of the cleaning port body 11. Are formed. The width of the gap 24 is about 2 to 3 mm when the outer diameter of the lid body 21 is about 100 to 150 mm.

Further, on the lower portion of the outer peripheral surface of the cylindrical portion 23, there are formed engagement protrusions 25 that are engageably and disengageably engaged with the engagement protrusions 15 of the cleaning port body 11 by the rotation of the lid body 21. There is. further,
A linear concave groove 26 is formed on the upper surface side of the lid body 21, and continuous recesses 27 are formed at both ends of the concave groove 26.

An annular fitting groove 28 is formed on the outer peripheral surface of the lid 21 and below the flange 22 over the entire circumference. An O-ring 31 as an annular ring body is fitted in the fitting groove 28. The O-ring 31 is made of an elastomer resin or the like and has elasticity,
The lid 21 is pressed against the inner peripheral edge of the bottom surface of the fitting step portion 14 so as to be freely contactable and separable.

An intervening piece 32, which is a short cylindrical elastic material, is formed integrally with the O-ring 31 so as to extend upward.
The intervening piece 32 is fitted into the upper portion of the gap 24 between the lid body 21 and the cleaning port body 11 to fill the upper portion of the gap 24. The intervening piece 32 reaches the upper surface of the lid body 21.

Then, when installing the drainage basin, the cleaning body
A portion of the 11 below the flange 13 is fitted to the outer peripheral side of the connection port 1 of the drainage basin. Further, concrete 2 is struck so as to wind around the connection port 1 and the outer peripheral surface of the cleaning port body 11.

Next, the operation of the above embodiment will be described.

Normally, the lid body 21 is fitted into the lid body receiving portion 12 of the cleaning port body 11 to close the upper opening end of the cleaning port body 11. Lid 21
In order to close, the lid 21 is placed on the cleaning port body 11 and a tool is inserted into the groove 26 of the lid 21, or both the recesses 27
The lid 21 is rotated in one direction by inserting a fingertip into. Then, the respective engagement protrusions 25 of the lid 21 will be
While sliding on each of the slanted engaging projections 15, the lid body 21 descends, and each engaging projection 25 is guided to the lower side of each adjacent engaging projection 15. The abutment portions on the lower surface of the strip 15 are brought into contact with each other. As a result, the lid 21 is securely locked to the cleaning port body 11.

In this state, the O-ring 31 of the lid 21 is pressed against the bottom surface of the fitting stepped portion 14 of the cleaning port body 11 and tightened by the screw action of the engagement between the engagement protrusion 15 and the engagement protrusion 25. The airtightness between the cleaning port main body 11 and the lid 21 is reliably maintained. This prevents leakage of bad odors and intrusion of rainwater from the inside of the cleaning port body 11.

When the drain pipe is cleaned or inspected, the lid body 21 is removed from the lid body receiving portion 12 of the cleaning port body 11 to open the upper opening end of the cleaning port body 11. To open the lid 21,
First, the lid 21 is rotated in the direction opposite to that when it is closed. Then, while the engaging protrusions 25 of the lid 21 slide along the inclined engaging protrusions 15 of the cleaning port body 11, the lid 21 rises, but the engaging protrusions 25 engage with each other. If the lid 21 is lifted while being detached from the lower side of the ridge 15,
21 is detached from the cleaning port body 11.

By the way, for example, when the temperature rises in summer,
The lid 21 expands, but the cleaning port body 11 is pressed down by the hard concrete 2, so expansion is prevented. However, there is a gap 24 between the outer peripheral surface of the lid body 21 and the inner peripheral surface of the lid body receiving portion 12 of the cleaning port body 11, and the gap 24 serves as a relief for the expansion of the lid body 21. , Lid
There is no tight fitting between 21 and the cleaning port body 11, and opening and closing of the lid 21 does not become difficult. That is, the lid 21 can always be easily opened and closed regardless of the temperature,
Confrontation is improved. Further, when the lid body 21 is expanded by heat, the intervening piece 32 is elastically contracted by being pushed by the lid body 21, and when the lid body 21 is contracted due to a decrease in temperature, the intervening piece 32 is elastically extended. Since the intervening piece 32 has elasticity in this way, it does not tightly fit the lid body 21 and does not hinder the opening and closing of the lid body 21.

Then, in the gap 24 between the lid body 21 and the cleaning port body 11, an intervening piece
Since 32 is interposed, sand or soil does not enter and get clogged between the lid body 21 and the cleaning port body 11.

Further, according to the above configuration, since the interposition piece 32 is integrated with the O-ring 31, the number of parts can be reduced, the structure is simple, the assembly is easy, and the cost can be reduced.

Although the O-ring 31 having the intervening piece 32 is attached to the lid 21 in the above embodiment, the O-ring having the intervening piece may be attached to the cleaning port body.

Further, it is of course possible to install the drain pipe cleaning port device in a place where concrete cannot be hit.

Furthermore, the cleaning port main body may be one that is fitted to the inner peripheral side of the connection port of the drainage basin.

[Effect of device]

According to the present invention, a gap is formed between the outer peripheral surface of the lid made of synthetic resin and the inner peripheral surface of the lid receiving portion of the cleaning port body made of synthetic resin. Since the elastic material is integrally formed with the ring body provided on at least one of the opposing surfaces of the lid and the lid receiving portion and pressed against the other, concrete is struck on the outer peripheral side of the cleaning port body. When the temperature rises in summer, concrete prevents expansion of the cleaning port body, and even if only the lid body expands, the gap between the cleaning port body and the lid body is tight due to the gap. And the lid can always be easily opened and closed. In addition, since the elastic material is interposed between the lid and the cleaning opening, it is possible to prevent sand or soil from entering the gap between the lid and the cleaning opening and clogging it.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the drainage pipe cleaning port device of the present invention, FIG. 2 is a plan view of the same, and FIG. 1 is a sectional view taken along line I--I of FIG. 11 …… Cleaning opening body, 12 …… Lid body receiving part, 21 …… Lid body, 24
…… Gap, 31 …… O ring as ring body, 32 …… Interposed piece that is an elastic material.

Claims (1)

[Scope of utility model registration request] 1. A cleaning port main body made of a synthetic resin and formed in a cylindrical shape having a lid receiving part on the inner peripheral side of an opening end, and a lid receiving part of the cleaning port main body detachably fitted. And a lid made of synthetic resin for opening and closing the opening end, and provided on at least one of the surfaces of the lid and the lid receiving portion of the cleaning port body facing each other so as to be separable from the other. And a ring body having elasticity to be pressed against each other, and a gap is formed between the outer peripheral surface of the lid body and the inner peripheral surface of the lid body receiving portion of the cleaning port body, and the space is interposed in the gap. A drain port cleaning port device, characterized in that an elastic material is formed integrally with the ring body.