JPS583890Y2 - manhole cover - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a manhole cover, and more particularly to a manhole cover provided with means for preventing earth and sand from entering into a hand balancing hole formed in the iron cover.

In the past, as seen in Utility Model Publication No. 41-11333, there was an idea to insert a padding into the hand hook engagement hole to prevent dirt from entering, but in the conventional structure, the padding was made of hard rubber, which prevented the hand hook from being secured. When putting it into the hole, it was necessary to remove the filling.

Therefore, there is a drawback that it is time-consuming and the filling may be lost.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a manhole cover that overcomes the above-mentioned drawbacks of the conventional manhole cover and allows easy work without losing the filling.

Therefore, in the present invention, a hand-balance retaining hole 2 is formed in the lid body 1, and a sponge-like material 3 that prevents the intrusion of earth and sand, etc., has flexibility to easily deform and resilience to restore. It is characterized in that a locking portion is provided at the opening of the retaining hole 2 to prevent the sponge-like material 3 from being easily pulled out.

In the figure, reference numeral 4 denotes a hand hook locking piece as a locking portion for preventing pull-out, which is provided opposite to the hand hook engaging hole 2 in the first embodiment, and a stepped portion 4' is formed thereon.

5 indicates a lid frame. Further, in the second embodiment (Figs. 4 and 5), the hand balance hole 2 is formed into a cross-sectional shape, and in the third embodiment (Figs. 6 and 7), it is semicircular. The cross section shows a shape in which a locking rod 6 as a locking portion is passed over the hand balance hole 2.

Each of the sponge-like members 3 has a shape that fits each hand balance hole 2 as shown in FIGS. 8A to 8C.

In particular, C has a thin hard piece 7 pasted on the top surface, which does not pose any problem in use and increases its robustness.

Since the present invention is based on the above structure, under normal conditions, the sponge-like material 3 filled in the hand balance support hole 2 can prevent earth and sand from entering the hand balance support hole 2. .

When opening the lid body 1 using a hand catch, there is no need to remove the filling as in the past, and it is very easy to open the lid body 1 by pushing the hand catch against the sponge-like material 3. Since it can be deformed, the lid body 1 can be operated by pushing it into the retaining hole 2 and locking it.

Also, if you remove the hand fishing, the sponge material 3 will be restored to its original state.
It acts to prevent the intrusion of earth and sand.

Therefore, according to the present invention, when removing and closing the lid by hand, there is no need to think about removing and attaching the filling material as in the conventional method, and the work can be done quickly and smoothly since the filling material can be handled as if there were no sponge material 3. We will improve the practical effect.

[Brief explanation of drawings]

The drawings show an embodiment of the manhole cover according to the present invention. Fig. 1 is a plan view of the first embodiment, Fig. 2 is a plan view of the main part, and Fig. 3 is a vertical sectional view, and Fig. Fig. 4 is a plan view of the main part of the second embodiment, Fig. 5 is a sectional view of the same as above, Fig. 6 is a plan view of the main part of the third embodiment, Fig. 7 is a sectional view of the same, and Fig. 8 is the same as the present invention. FIG. 2 is a perspective view of a sponge-like material used for a manhole cover. 1... Lid body, 2... Hand balance engagement hole, 3
... Sponge-like material to prevent earth and sand intrusion, 4...
・Latching piece.

Claims (1)

[Scope of utility model registration request] A hand-balance retaining hole 2 is formed in the lid body 1, and a sponge-like material 3 for preventing the intrusion of earth and sand, which has flexibility to easily deform and resilience to restore, is embedded in the hand-balance engaging hole 2. A manhole cover characterized in that a locking part is provided at the opening of the retaining hole 2 to prevent the sponge-like material 3 from being easily pulled out.