JPH0745641Y2 - Manhole cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a cable embedded in an underground portion of a road, a manhole cover connected to an underground groove of a gas or water pipe.

[Outline of device]

In the manhole cover of the present invention, the upper surface of the manhole cover made of iron is bonded with the resin containing rice husk powder to crushed stone, silica stone, etc., and covered with the formed road mat to form a surface similar to the road surface. It acts as a non-slip for pedestrians and vehicles, and it can add noise resistance to the iron manhole and at the same time prevent noise generation.

Further, the road mat mounted on the manhole cover is provided with an opening penetrating from the upper surface to the lower surface, and by pouring a resin of a different color into the opening, a mark can be attached to identify the manhole.

[Conventional technology]

A large number of underground trenches with gas, water and sewage, telephone cables, etc., are formed on the roadway or residential road.
A manhole is formed in this subterranean ditch for access from the road surface for repair and inspection.

An iron lid is usually fitted in such a manhole, but when the lid gets wet, it becomes extremely slippery, and therefore, a slip-resistant groove pattern is usually engraved on the surface of the lid.

[Problems to be solved by the invention]

However, such a manhole cover is also a factor that causes a traffic accident due to slippage because the cover surface is heavily worn when exposed to a road with a large amount of traffic, and slips easily especially in rainy weather. ing.

Further, when an iron manhole is exposed on the road, there is a problem that a vehicle passing on the manhole often causes noise to deteriorate the town environment.

[Means for solving problems]

The present invention has been made in consideration of such problems,
A road mat made of a resin layer containing rice husk powder on the upper surface of an iron manhole lid, and a wear-resistant layer formed by bonding crushed stone and silica sand with the resin containing rice husk powder on the road surface mat is mounted and bonded. Then, the level difference with the paved road on which the manhole is installed is corrected, and the function of preventing slippage and noise is added.

[Action]

Since the rice husk powder is an ultrafine powder whose main component is cellulose, it has a particularly good affinity for thermoplastics and has an extremely good processability.

Therefore, it can be easily formed into a mat shape along the shape of the manhole cover.

Further, the road surface mat is provided with an opening that penetrates from the upper surface to the lower surface at the time of manufacture, and a mark of different colors can be easily added by pouring a resin of a different color into this opening.

〔Example〕

FIG. 1 shows a side view of the manhole cover of the present invention, in which 1 is a manhole, 1A is a manhole frame (cover receiving part), and 3 is a manhole cover. Reference numeral 4 denotes a road surface mat attached to the upper surface of the manhole cover 3, and this road surface mat 4 uses a resin containing rice husk powder as a binder as described later.

In addition, 5 shows an asphalt pavement surface.

2 (a) and 2 (b) are road mats 4 used in the present invention.
An embodiment of the present invention is shown in a side view and a top view. The road mat 4 has a buffer layer 4A having a thickness of about 1 to 3 mm formed of a resin layer mixed with rice husk powder on the lower surface, and the upper layer portion thereof is Is a wear-resistant layer 4B having a thickness of 10 to 20 mm and further containing crushed stone and silica sand. In addition, 4C shows an insertion hole of a jig which is inserted when the manhole cover is lifted.

This road mat 4 is an MMA-based resin (acrylic resin-based paving material) in a form that is approximately the same size as the outer shape of the manhole cover.
(1), aggregate No. 7 (4-5) silica sand No. 5 (1) silica sand No. 8 (0.5) and rice husk powder (0.05-0.1) are mixed to a thickness of 10-
Pour to a thickness of 20 mm to form the wear resistant layer 4, and then pour a mixture of rice husk powder (0.1 to 0.2) into the MMA resin (1) to a thickness of 1 to 3 mm on the wear resistant layer. It is formed as a buffer layer.

{The inside of () shows an example of a weight ratio} The road surface mat 4 thus formed can be cured in a few hours and taken out from the mold.

The taken out road mat 4 is punched out according to the individual manhole cover, and the insertion hole 4C is punched out. Then, it is transported to the work site and mounted and attached on the manhole cover 3 as shown in FIG.

The molded road surface mat 4 is flexible and fits well on the surface of the manhole cover 3.

Also, since the surface of the wear resistant layer 4B is made porous,
The anti-slip effect is great, and the aggregate of the wear resistant layer 4B is MM
Since the A resin is strongly bonded to each other through the rice husk, the porous aggregate does not come off.

Similarly, the MMA-based resin that will be the buffer layer 4A also forms a strong layer with excellent elasticity and resilience due to the intimate binding force with the rice husk powder, so it has an appropriate elasticity for pedestrians and vehicles. It can give high soundproofing.

It is also conceivable to use urethane resin, epoxy resin or the like in addition to the MMA resin.

Needless to say, it can be applied to a rectangular manhole as shown in FIG.

In addition, if the unevenness that forms the surface pattern of the manhole cover is formed on the bottom surface of the mold for manufacturing the road mat, the adhesion between the buffer layer 4A and the manhole cover 3 is further improved, and the road mat is fixed even after the manhole is performed. Sexuality improves.

FIG. 4 shows another embodiment of the road mat which constitutes the manhole cover of the present invention, and the same parts as those in FIG. 2 are designated by the same symbols.

In the case of this embodiment, the company name or mark 4D for managing the manhole is added to the road mat 4.

This company name or the portion of the mark 4D is colored differently from the road mat 4, and as shown in the partial cross-sectional view of FIG. 4, the lower surface of the road mat (the buffer layer may be removed) ) Is formed to have the same color.

That is, when the road mat is manufactured by pouring or the like, the mold is fixed to the part of the company name or the mark 4D to form the opening. Then, the MMA resin dyed in a different color is poured into this opening later, and a company name or a mark is attached.

Therefore, the manhole cover according to this embodiment has an advantage that the company name or the mark portion is not erased even when the surface thereof is worn by a vehicle or a pedestrian.

[Effect of device]

As explained above, the manhole cover of the present invention is a road surface mat made of a wear-resistant layer in which a resin containing rice husk powder is used as a buffer layer on the upper surface of an iron manhole cover, and crushed stone and silica sand are bonded with the resin containing rice husk powder. Since it is configured to cover, the upper portion of the manhole is abrasion-resistant, and at the same time, noise is prevented by providing appropriate elasticity and resilience. or,
Even if it gets wet with rain, it has an anti-slip effect, so it has the effect of suppressing the occurrence of traffic accidents.

Furthermore, the utilization of rice husks, which has been a waste material in the past, makes it possible to reuse resources, and at the same time, it is possible to reduce the cost because it is cheap.

In addition, by forming an opening that penetrates from the upper surface to the lower surface of the road surface mat, and by pouring a resin of a different color into this opening, add a marker that does not disappear even when the surface is worn, to the manhole cover. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a side view showing the construction of a manhole cover of the present invention, FIGS. 2 (a) and 2 (b) are sectional views and a top view of a manhole cover showing an embodiment of the present invention, and FIG. 3 is another view of the present invention. FIG. 4 is a perspective view showing an embodiment, and FIG. 4 is an explanatory view showing still another embodiment of the present invention. In the figure, 1 is a manhole, 2 is a manhole frame, 3 is a manhole cover, 4 is a manhole cover, 4A is a buffer layer, 4B is a wear resistant layer, and 4D is a mark.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toshitake Matsuda 1-16-10 Dogenzaka, Shibuya-ku, Tokyo Inside Japan Ocean Submarine Electric Cable Co., Ltd. (72) Masahiro Furukawa 1-1-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corp. (72) Inventor Shoroku Ito 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corp. (56) Bibliography Sho 61-15345 (JP, U) Showa 57-60944 (JP, U) Actually opened Showa 48-79166 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. A road surface mat having a two-layer structure comprising a rice husk powder-containing resin as a buffer layer and a wear-resistant layer formed by combining crushed stone and silica sand with the rice husk powder-containing resin as an upper layer, and bonding the road surface mat to a manhole cover. Manhole cover to be. 2. The road mat has a sign attached to the surface thereof, and the sign is formed by pouring a resin of a different color into an opening penetrating from the upper surface to the lower surface of the road mat. Manhole cover according to claim (1) of the new model registration claim.