JP4345053B2 - Centering member for drainage mass etc. - Google Patents

Description

This invention is provided to inspect the inside of a drain pipe or a sewer pipe when installing a drainage mass that discharges rainwater or domestic sewage or a manhole provided in the middle of a sewer pipe buried under a road. The present invention relates to a centering member in a drainage mass or the like in which a rising pipe and a pedestal arranged on the outer peripheral portion of the rising pipe and supporting an inspection lid can be reliably arranged on a concentric circle.

  A riser pipe connected to a drainage pipe or a sewer pipe buried in the ground, a manhole, etc. (hereinafter collectively referred to as “drainage mass etc.”), and an outer periphery near the upper end of the riser pipe As a means for smoothly opening and closing the opening / closing lid attached to the upper end opening of the riser pipe and the inspection lid arranged flush with the road surface. For example, there exists Unexamined-Japanese-Patent No. 10-204905 (patent document 1).

  The sewage inspection port protective lid device proposed in Patent Document 1 has a lower end communicating with a sewage pipe line, a closed lid provided at the upper end opening so as to be freely opened and closed, and molded with a synthetic resin. A support pedestal that is installed at an upper position of the riser pipe and has a fitting hole that is loosely fitted to the upper outer peripheral surface of the riser pipe, and an inspection lid that is supported on the support pedestal. A lid receiving frame that can be freely opened and closed, and a plurality of protrusions projecting from the inner peripheral surface of the fitting hole of the support pedestal with the tip facing the upper outer peripheral surface of the riser with a gap It is.

In Japanese Utility Model Publication No. 6-34084 (Patent Document 2), the lower end of the riser pipe is connected to the upper receiving port of the drainage main body, and a pedestal ring is provided on the side of the upper end of the riser pipe. In the drainage where the lower end portion of the protective cylinder is placed and the manhole cover is provided at the upper end portion of the protective cylinder so as to be openable and closable, between the inner peripheral surface of the pedestal ring and the outer peripheral surface of the upper end portion of the riser pipe, A drainage basin has been proposed in which protrusions for preventing misalignment that almost reach the other surface from one surface are interposed at a plurality of locations.
JP-A-10-204905 (Claims, FIG. 3) Japanese Utility Model Publication No. 06-034084 (Utility Model Registration Request, FIGS. 2 and 7)

Among these known means, the invention described in Patent Document 1 has the advantage that the center of the riser pipe and the center of the pedestal can be easily aligned, but on the inner peripheral surface of the fitting hole of the support pedestal, A plurality of projecting portions whose front ends are opposed to the upper outer peripheral surface of the riser with a gap are provided.
Therefore, in actual use, when the gap between the outer peripheral surface of the riser pipe and the protrusion of the support pedestal is small, or when the tip of the protrusion comes into contact with the outer peripheral surface of the riser pipe, the protrusion protrudes into the fitting hole of the support pedestal. By separating the provided projection with a tool such as a cutter knife, the fitting hole of the support pedestal is prevented from coming into contact with the riser pipe, thereby preventing unexpected pressure from acting on the riser pipe. It is always necessary to do this work.

In addition, the drainage basin described in Patent Document 2 includes a plurality of misalignment prevention protrusions that substantially reach from one surface to the other surface between the inner peripheral surface of the pedestal ring and the outer peripheral surface of the upper end of the riser pipe. It is interposed at the place.
As a means for this, pedestal rings having different shapes are disclosed in FIGS. 2, 4, and 7, but the protrusions shown in FIGS. 2 and 4 are not sufficient to support the riser and are displaced. There is a risk. Further, in the pedestal ring shown in FIG. 7, the riser pipe may be crushed by the pedestal ring.

In view of the present situation, the present invention can ensure that the pedestal is arranged concentrically on the outer periphery of the riser pipe when the pedestal is arranged on the upper outer periphery of the riser pipe. Is intended to provide a centering member in a drainage mass or the like that is not misaligned or damaged.

The centering member in the drainage mass or the like according to claim 1 of the present invention,
While forming the ring main body having the required diameter and thickness with an elastic material,
The inner periphery of the ring main body has a plurality of inner protrusions that contact the outer periphery of the riser constituting the drainage mass, and the outer periphery is positioned substantially at the center between the inner protrusions. A plurality of outer protrusions that contact the inner periphery of the pedestal,
Each is characterized by being formed.

The invention according to claim 2 of the present invention is
In the centering member in the drainage mass or the like according to claim 1,
The ring main body is
It is made of foamed polyethylene, and the inner and outer protrusions are integrally molded.

The invention according to claim 3 of the present invention is
In the centering member in the drainage mass or the like according to claim 1,
The inner and outer protrusions are
Each of them is arranged at equal intervals.

The centering member in the drainage mass and the like of the present invention comprises a drainage mass and the like on the inner peripheral part of the ring main body having a required diameter and thickness made of an elastic material, and an outer peripheral part of the riser pipe to be centered A plurality of abutting inner protrusions are integrally formed on the outer peripheral portion thereof, and a plurality of outer protrusions abutting on the inner peripheral portion of the pedestal that is disposed on the outer peripheral portion of the riser pipe and is to be centered are integrated. The riser, the ring main body and the pedestal are securely arranged on a concentric circle by an extremely simple and easy means of fitting the ring main body to the outer periphery of the riser pipe and then mounting the pedestal on the ring main body. Can do.
Further, the riser pipe can be prevented from being inadvertently deformed, and the lid for closing the riser pipe opening and the inspection lid attached to the protective cylinder can be smoothly opened and closed.

  In particular, in the present invention, the outer protrusion is formed so as to be positioned at the center between the adjacent inner protrusions, so that even if any load acts on the pedestal, it is formed between the inner protrusions. Since the recess serves as an escape allowance for deformation of the ring main body, there is no possibility that the riser is deformed.

In addition, the plurality of inner protrusions formed on the ring main body are formed such that the diameter formed at the tip of each inner protrusion contacting the outer peripheral portion of the riser is slightly smaller than the outer diameter of the riser. The diameter of the outer protruding portion formed at the tip of each outer protruding portion that comes into contact with the inner peripheral portion of the pedestal is larger than the minimum inner diameter of the pedestal, so that a plurality of diameters can be formed by one ring main body. It can be applied to different pedestals.

Hereinafter, an example of a centering member in a drainage mass or the like of the present invention will be described in detail with reference to the accompanying drawings.
1 is a plan view of a centering member in a drainage mass or the like of the present invention, FIG. 2 is a central longitudinal sectional view in FIG. 1, FIG. 3 is an explanatory view of a method of mounting on a riser pipe, and FIG. It is an expanded sectional view which notched.

  As shown in FIGS. 1 and 2, the centering member 1 in the drainage mass or the like of the present invention forms the ring main body 2 with an elastic material having a required diameter and thickness, for example, a synthetic resin material such as foamed polyethylene. A plurality of inner protrusions 3 (four in FIG. 1) that contact the outer peripheral portion 5a of the rising pipe 5 shown in FIGS. 3 and 4 are provided on the inner peripheral portion of the ring main body 2. A plurality of outer protrusions (four in FIG. 1) 4 that are in contact with the inner periphery 7b of the base 7 shown in FIGS. 3 and 4 are integrally formed on the outer periphery. is there.

  In the inner protrusion 3, the tip surfaces 3 a contacting the outer peripheral portion 5 a of the riser 5 form a virtual circle A, and the diameter of the virtual circle A is larger than the outer diameter of the riser 5. More preferably, the number is set to an even number so that two or more are equally spaced and can be opposed on a line passing through the center.

  Further, in the outer protrusion 4, the front end surfaces 4 a contacting the inner peripheral portion 7 b of the pedestal 7 form a virtual circle B, and the diameter of the virtual circle B is slightly larger than the inner diameter 7 b of the pedestal 7. In order to be larger and to be positioned at substantially the center between the adjacent inner protruding portions 3 and 3, in other words, to be positioned at approximately the center of the recess 3b formed between the inner protruding portions 3 and 3. Is formed.

  In addition, the riser pipe 5 in FIG. 3 is a sewage pipe having a lower end (not shown) formed of a vinyl chloride resin pipe buried in the ground through a drainage mass or the like. The upper end opening is opened at a position below the ground surface R such as a road surface.

The pedestal 7 is formed with a fitting hole 7a having an outer diameter larger than the outer diameter of the riser pipe 5. The fitting hole 7a is formed in a reduced diameter toward the lower end, and is formed on the upper surface side thereof. A cylindrical protective cylinder 8 is mounted and fixed.
In this protective cylinder 8, a receiving edge 10 for holding an inspection lid 9 formed of a casting or the like so as to be openable and closable is projected in an annular shape on the upper inner peripheral portion. The inspection lid 9 is connected to the protective cylinder 8 by a chain 11.

  In the figure, reference numeral 6 denotes a lid attached to the upper opening of the riser pipe 5, and X denotes the surface of the excavated soil backfilled to the vicinity of the upper part of the riser pipe 5.

As shown in FIG. 3, the centering member 1 having the above-described configuration is configured such that the ring main body 2 is fitted into the upper outer peripheral portion of the rising pipe 5 protruding vertically from the surface X of the excavated soil.
The inner diameter of the ring main body 2, specifically, the diameter of the virtual circle A formed by the tip surfaces of the plurality of inner protrusions 3 protruding from the inner periphery is larger than the outer diameter of the riser 5. However, the centering member 1 is deformed due to the elastic body, and is placed on the surface X of the excavated soil while being in contact with the rising pipe 5.

Next, while visually observing the ring main body 2, the fitting hole 7 a of the base 7 is fitted from above the rising pipe 5, and the outer peripheral portion of the ring main body 2, specifically, the distal end surface 4 a of the outer protruding portion 4 and the above-mentioned fitting. The base 7 is further pressed in the direction X of the surface of the excavated soil in a state where the joint holes 7a are in contact with each other evenly.
At that time, the outer diameter of the ring main body 2, that is, the diameter of the virtual circle B formed between the front end surfaces 4 a of the outer protrusions is slightly larger than the inner diameter 7 b of the pedestal 7. Therefore, the outer protrusion 4 is located at the center of the inner protrusions 3, 3, and the outer protrusions 4, 4.
Therefore, the inner protrusions 3, 3... Formed on the inner periphery of the ring main body 2 are in close contact with the outer periphery of the riser 5, and at the same time, formed between the adjacent inner protrusions 3, 3. The recess 3b moves to the riser 5 side, and the base 7 and the ring main body 2 can be arranged concentrically around the axis of the riser 5.

  Thus, when the pedestal 7 is concentrically arranged and fixed on the outer peripheral portion of the riser pipe 5 on the surface X of the excavated soil using the ring main body 2, the protective cylinder 8 is fixed to the surface of the pedestal 7 according to a conventional method. The ground surface R is formed by flowing asphalt or the like so as to be flush with the surface of the inspection lid 9 attached to the protective cylinder 8.

In the above embodiment, the number of the inner protrusions 3 formed on the ring main body 2 is four, but may be five.
In any case, if the outer protruding portion 4 is formed on the outer peripheral portion located substantially at the center of the adjacent inner protruding portions 3 and 3, a predetermined effect can be obtained.

The material of the centering member 1 is preferably foamed polyethylene due to its elasticity and recyclability, but may be foamed polystyrene or urethane foam.
Further, the ring main body 2, the inner ridge portion 3 and the outer ridge portion 4 may be formed separately, and the centering member 1 may be formed in combination.

Further, the arrangement of the centering member 1 is such that after the pedestal 7 of the riser pipe 5 is extrapolated and temporarily installed, the centering member 1 is deformed and fitted into the gap between the riser pipe 5 and the pedestal 7. The axis of the pedestal 7 may be aligned.

FIG. 1 is a plan view of a centering member in a drainage mass or the like of the present invention. FIG. 2 is a central longitudinal sectional view in FIG. FIG. 3 is an explanatory view of a method of mounting on the riser pipe. FIG. 4 is an enlarged sectional view with a part cut away showing a use state.

DESCRIPTION OF SYMBOLS 1 Centering member 2 Ring main body 3 Inner protruding part 3a End surface of inner protruding part 3b Recessed part 4 Outer protruding part 4a End surface of outer protruding part 5 Rise pipe 7 Base 7a Fitting hole A, B Virtual circle

Claims (3)

While forming a ring main body having a required diameter and thickness with an elastic material ,
A plurality of inner ridges that are in contact with the outer peripheral portion of the riser pipe that constitutes the drainage mass are disposed on the inner peripheral portion of the ring main body, and the outer peripheral portion is positioned at a substantially central portion between the inner ridge portions. A centering member in a drainage mass or the like, wherein a plurality of outer ridges that contact the inner periphery of the pedestal are formed respectively. The ring main body is
2. The centering member in the drainage mass or the like according to claim 1, wherein the centering member is made of polyethylene foam, and the inner projecting portion and the outer projecting portion are integrally molded. The inner ridge and the outer ridge are
The centering member in the drainage mass or the like according to claim 1, wherein the centering members are arranged at equal intervals.

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