JP2002275925A - Cover body of manhole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover body of a manhole capable of paving the surface of the cover body set on the drain pipe line manhole embedded in the roadway with a roadway paving material such as concrete, asphalt or the like, at the same time, preventing the slip of a vehicle by providing an architectural design pattern having durability to the cover body and preventing the slip of the vehicle by eliminating puddles on the cover body because of its permeability. SOLUTION: For the cover body of the manhole constituted by filling a recess section of the metal made-cover body having the recess section consisting of the bottom plate and the peripheral frame body thereof with the roadway paving material, and the architectural design pattern consisting of a compression resistive member rising from the bottom plate to the approximately same height as that of the frame body is provided to the recess of the cover body. The roadway paving material has permeability, and a through-hole located in a position leading to the inside of the manhole is made in the bottom plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole cover installed in a drainway manhole buried under a roadway so as to be flush with the roadway surface.

[0002]

2. Description of the Related Art In a drainage pipe for draining wastewater or rainwater, an inspection hole is provided for checking and maintaining the drainage state of the pipe and the condition of the pipe. Mounting pipes for inflowing drainage are buried in the main pipes, and manholes are installed in these drainage main pipes or mounting pipes. The manhole is provided with a cover directly at the upper end of the manhole, or a protective hat having a cover around the upper end of the manhole, and the vehicle passes over these covers. In order to receive the load of the loaded vehicle, the protective hat has a base ring made of concrete or the like disposed around the upper end of the riser pipe, and a receiving frame made of cast iron or the like having a lid is placed on the base ring.

Conventionally, this lid is often made of cast iron.
Designs such as a city mark that manages drainage pipes and uneven patterns to prevent slipping on the surface were used to indicate the design pattern.However, on rainy days, etc., rainwater etc. Once there, the wheels slipped over the manhole cover, which was dangerous. So recently,
By making the concave part of the metal lid main body having the concave part composed of the bottom plate and the surrounding frame body filled with the road paving material such as concrete or asphalt, the traveling state is the same as the road surface. A lid that prevents slipping on a lid of a vehicle manhole is also used.

[0004] In addition, when water accumulates on the road, there is a danger of slipping or the like for vehicles running at high speed. Therefore, recently, there is a pavement road which is not formed with puddles, which is paved with a road pavement material such as asphalt material or concrete material having water permeability.

[0005]

As described above, in the case of a manhole cover having the same material layer as the road pavement material on its surface, it is difficult to provide a design pattern or the like on concrete or asphalt. A lid having a design pattern such as a mark cannot be obtained. Further, even if the concrete surface or the asphalt surface is provided with irregularities such as a design pattern, there is a drawback that the corners of the projections of the irregularities are immediately worn due to the passage of the vehicle, and the design pattern cannot be recognized. It is also conceivable that the road surface is paved with a water-permeable road pavement material, and the recess of the metal lid body is also filled with a manhole cover filled with the water-permeable road pavement material. However, since there is no through hole in the bottom plate of the conventional metal lid body, when the amount of rainfall exceeds a certain amount, the rainwater accumulated in the concave portion of the metal lid body forms a water pool on the surface of the lid body, and at a high speed. There is a danger such as slippage for a running vehicle.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems in the cover of a manhole installed on a road surface, and the manhole according to the first aspect of the present invention. Is a manhole cover in which a concave portion of a metal lid body having a concave portion formed of a bottom plate and a peripheral frame member is filled with a road pavement material. A manhole cover is provided with a design pattern made of a compression-resistant material rising at the same height. According to a second aspect, the design pattern is formed integrally with the concave bottom plate of the lid body,
According to a third aspect of the present invention, the connected design pattern is provided on the concave bottom plate of the lid body.

The manhole cover according to the fourth aspect of the present invention is a manhole cover in which a recessed portion of a metal cover body having a bottom plate and a frame around the bottom plate is filled with a road pavement material. The manhole cover is characterized in that the road pavement material has water permeability and the bottom plate is provided with a through hole at a position communicating with the inside of the manhole.
According to a fifth aspect of the present invention, in the manhole cover according to the fourth aspect, a design pattern made of a compression-resistant material that rises from the bottom plate to substantially the same height as the frame is provided in the concave portion of the lid body. In the sixth aspect, the design pattern is formed integrally with the concave bottom plate of the lid body.
Has a connected design pattern installed on a concave bottom plate of a lid body.

[0008] In the manhole cover according to the present invention, the design pattern made of a compression-resistant material is disposed in a concave portion of the metal cover body and forms the design pattern at the upper end surface thereof. It is sufficient if it has substantially the same height as that of the vehicle and has a compressive strength enough to withstand the load even when the loaded vehicle passes over it. The design pattern may be formed integrally with the bottom plate of the lid main body, or may be a design pattern connected to the lid main body and separately provided on the bottom plate. If the lid body and the design pattern are separate, the lid body can be manufactured by combining any design pattern with the lid body, so it is not necessary to make the lid body according to the difference in the design pattern, Mass production of
An inexpensive lid can be provided. The compression-resistant material is preferably a metal such as a casting or iron, but may be another metal or a stone. In the case where the design pattern is not continuous but is discontinuous, it is preferable to connect and integrate the respective patterns. For integration, it is preferable to weld or bond on a thin plate.

In the invention according to claim 4, the road pavement material filled in the concave portion of the metal lid main body has water permeability, and the bottom plate is provided with a through hole at a position communicating with the manhole. . The size and number of the through-holes are determined so that the rainwater soaked in the water-permeable road pavement material in the cover body concave portion falls into the manhole through the bottom plate. For example, in the case of a lid having a diameter of 600 mm, a diameter of 10 mm
It is sufficient that about 20 holes are provided so as to be evenly arranged. If the holes are large, the road pavement material may be broken by the weight of the vehicle, and the strength of the lid body may be reduced. If a wire mesh or the like is applied to the through holes, leakage of the road pavement material when injected can be prevented.

[0010] In the manhole cover having the water-permeable road pavement material, the road pavement material may be provided with a design pattern made of a compression-resistant material that rises substantially at the same height as the frame from the bottom plate. .

[0011] The cover of the present invention is formed by filling a road pavement material into a concave portion excluding a design pattern portion of a metal cover main body formed with a design pattern integrally or on a bottom plate, and squeezing the material.
The road pavement material can be cured and easily manufactured.

[0012]

In the manhole cover constructed as described above, a manhole cover in which a road paving material is filled in a recess of a metal cover body having a recess formed by a bottom plate and a frame around the bottom plate. In the concave portion of the lid body, since a design pattern made of compression-resistant material that rises from the bottom plate to almost the same height as the frame body is provided, the entire road can be made a road surface unified with road pavement material, and Design patterns can be easily formed. Further, in a manhole cover in which a road paving material is filled in a concave portion of a metal lid body having a concave portion formed of a bottom plate and a peripheral frame, the road paving material has water permeability, and the bottom plate has a manhole. Since the through hole is provided at a position communicating with the inside, rain penetrates through the permeable road pavement material and flows down into the manhole from the through hole provided in the bottom plate. Therefore, there is no water pool on the surface of the cover of the manhole, and no slip occurs even when the vehicle passes.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. FIG. 1 shows an example of a manhole cover according to the present invention, wherein (a) is a plan view and (b) is a cross-sectional view. In the figure, 1 is a lid body made of cast iron,
And a frame body 12 to form a concave portion 13 opening upward. Reference numeral 2 denotes a design pattern that rises integrally from the bottom plate 12 of the lid body 1, and the upper surface 21 is formed at substantially the same height as the upper surface of the frame 12 of the lid body 1. Reference numeral 3 denotes a road pavement material in which a recess 13 excluding the design pattern 2 is filled with a road pavement material, compacted and hardened. Road pavement material 3
Is substantially the same as the upper surface 21 of the design pattern 2, and the design pattern 2 is formed by exposing the upper surface 21 to the surface of the road pavement material 3.

FIG. 2 is a sectional view showing another example of the manhole cover according to the present invention. FIG. 2 shows an example in which the design pattern 2a is formed separately from the lid main body 1a. The individual design patterns are respectively connected to the metal plate body 22a to be integrally formed, and the design pattern 2a is formed on the entire upper surface 21a. In order to form the design pattern 2a in which the metal plate 22a and the individual design patterns are integrated, even if the integrated design pattern 2a is manufactured by mold molding, the individual design patterns are welded to the metal plate 22a. Alternatively, the design pattern 2a may be manufactured by bonding. Such a design pattern 2a is
It is placed on the bottom plate 11a of the metal lid main body 1a in which the recess 13a is formed by the bottom plate 11a and the frame 12a, and the recess 13a
The gap between the design patterns 2a is filled with a road pavement material 3a to form a manhole cover.

FIG. 3 shows an embodiment of the manhole cover according to the present invention, wherein (a) is a plan view,
(B) is a sectional view. In FIG. 3, the metal lid main body 1b is
A concave portion 13b is formed by the bottom plate 11b and the frame 12b, and a through hole 14b is provided in the bottom plate 11b. Through hole 1
4b is preferably provided such that holes smaller than 10 mm are evenly distributed over the entire surface of the bottom plate 11b. Reference numeral 3b denotes a road pavement material made of concrete or asphalt having water permeability, and is filled in the recess 13b of the metal lid main body 1b. When used as a cover of a manhole buried under a roadway, rainwater flows down into the manhole through the permeable road pavement material 3b and the through hole 14b of the bottom plate 11b, and no water pools are generated on the roadway surface.

FIG. 4 is a sectional view showing an embodiment corresponding to claim 7 of the manhole cover according to the present invention. In the embodiment shown in FIG. 3, a design pattern 2c is provided. The design pattern 2c is similar to the design pattern 2a shown in FIG. 2, and includes a bottom plate 11c of the metal lid main body 1c and a frame body 12c.
c, the design pattern 2c is placed in the concave portion 13c, and the space inside the concave portion 13c is filled with the road paving material 3c. 14c is a through hole. In this case, if the design pattern 2c has a closed shape such as a circle, the design pattern 2c
Since water accumulates in c, and eventually water accumulates on the lid, it is preferable to provide a through hole in the metal plate 22c in the closed design pattern 2c.

[0017]

Since the present invention is configured as described above, it has the following effects.

Since a design pattern made of a compression-resistant material that rises from the bottom plate to substantially the same height as the frame body is provided in the concave portion of the lid body, the entire road can be made a uniform road surface with a road pavement material. A strong design pattern can be easily formed. In the case where the road pavement material has water permeability and the bottom plate is provided with a through hole at a position communicating with the manhole, rain penetrates through the water permeable road pavement material and the through hole provided in the bottom plate. From the manhole. Therefore, there is no water pool on the surface of the cover of the manhole, and no slip occurs even when the vehicle passes.

[0019]

[Brief description of the drawings]

FIG. 1 shows an example of a manhole cover according to the present invention;
(A) is a plan view, and (B) is a sectional view.

FIG. 2 is a sectional view showing another example of the manhole cover of the present invention.

FIG. 3 shows an embodiment of the manhole cover according to claim 4 of the present invention, wherein (a) is a plan view and (b) is a cross-sectional view.

FIG. 4 is a sectional view showing an embodiment of the manhole cover according to the present invention, which corresponds to claim 7;

[Explanation of symbols]

 1, 1a, 1b, 1c Metal lid body 11, 11a, 11b, 11c Bottom plate 12, 12a, 12b, 12c Frame body 13, 13a, 13b, 13c Concave portion 2, 2a, 2b, 2c Design pattern 21, 21a Design Upper surface of pattern 22a, 22c Metal plate 3, 3a, 3b, 3c Road pavement material 14b, 14c Through hole

Claims (7)

[Claims] 1. A manhole cover in which a road paving material is filled in a concave portion of a metal lid body having a concave portion formed of a bottom plate and a frame around the bottom plate. A manhole cover characterized by being provided with a design pattern made of a compression-resistant material rising at the same height. 2. The manhole cover according to claim 1, wherein the design pattern is formed integrally with the concave bottom plate of the cover body. 3. The manhole cover according to claim 1, wherein the connected design pattern is provided on a concave bottom plate of the cover body. 4. A manhole cover in which a concave portion of a metal lid main body having a concave portion composed of a bottom plate and a peripheral frame body is filled with a road paving material, wherein the road paving material has water permeability, A manhole cover, wherein a through hole is provided at a position leading to the inside of the manhole. 5. The manhole cover according to claim 4, wherein a design pattern made of a compression-resistant material rising from the bottom plate to substantially the same height as the frame is provided in the recess of the cover main body. 6. The manhole cover according to claim 5, wherein the design pattern is formed integrally with the concave bottom plate of the cover body. 7. The manhole cover according to claim 5, wherein the connected design pattern is provided on a concave bottom plate of the cover main body.