JP2001152473A - Hinge for manhole lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge for the lid of a manhole of which the installation place is not restricted and the freedom of the opened position can be increased. SOLUTION: One end of a wire 9 having an arbitrary length is attached to a hinge body 7 provided with a hook 7a engaging with an engaging part 5a of a receive frame 5 of a projected shaft 8 to pivot to the manhole lid 4 and the receive frame 5 of the manhole lid for a manhole lid, and a stopper 10 is fixed to the other end of the wire 9 by a U-shaped bolt 11 and a nut 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge for a manhole cover such as a manhole for water supply and sewerage and a water tank for firefighting.

[0002]

2. Description of the Related Art As is well known, a manhole for water supply and sewerage and a manhole cover for a fire fighting water tank are connected to a hook 1 as shown in FIG. A hinge 3 provided with a stop portion 2 is hinged to a manhole cover 4, and the locking portion 2 of the hinge 3 is engaged with an annular stopper 6 provided on an inner wall of a manhole cover receiving frame 5.

However, in this structure, in order to completely open the manhole cover 4, the manhole cover 4 is pulled up to the ground as shown in FIG. It must be rotated 180 degrees horizontally as an axis, so at least a space around the manhole is needed to rotate the lid, such as a manhole for fire prevention water tanks, etc. There are many inconveniences when installing it near a wall, etc., and the installation place is also limited.
In addition, the structure of the hinge of the manhole cover installed in the place as described above is complicated due to the installation conditions, and the cost is high.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a hinge for a manhole cover in which the installation location of the manhole is not restricted and the degree of freedom of the opening position of the manhole cover can be increased. Things.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a lower portion of a main body provided with a hook portion which engages with an engagement portion provided on an inner wall of a manhole cover receiving frame. And a manhole cover hinge in which a connecting cable of any length provided with a weight / stopper at the end is attached in a tail shape.

[0006]

FIG. 3 is a partially cut-away side view of one embodiment of the present invention. Reference numeral 7 denotes a projection shaft 8 provided on both sides pivotally attached to a manhole cover 4 as in the prior art, and a manhole cover receiving frame. A hinge body provided with a hook 7a which engages with an engaging portion 5a provided on the inner wall of the body 5;
The stainless steel wire 10 is a weight and stopper which is attached to the lower end of the wire 9 with a U-shaped bolt 11 and nut 12 in a cross shape.

The main body 7 is pivotally attached to the manhole cover 4 in the same manner as in the prior art, and the wire 9 and the stopper 10 are inserted into the annular stopper 6 as shown in FIG.

When the manhole cover 4 with the hinge according to the present invention is opened, the opposite side of the hinge mounting position of the manhole cover 4 is reversed from the hinge direction by using an opening tool as in the prior art. The hook 7a and the engaging portion 5a
The main body 7 is pulled up together with the manhole cover 4 and the stopper 10 is engaged with the annular stopper 6 to limit the moving range. However, the manhole cover 4 can be freely moved within the length of the wire 9. You can move. Therefore, there is no need to provide a space for placing a sufficient manhole cover on the hinge mounting side, and the degree of freedom of manhole setting conditions is increased.

When the manhole cover 4 is closed, the wire 9 has rigidity so that the annular stopper 6 can be smoothly closed.
It slides down inside and can be closed without any trouble.

FIG. 4 shows another embodiment of the present invention.
A projecting shaft 8 is provided on both sides, and a chain 13 of an arbitrary length is connected to the main body 7 provided with a hook 7a. Things. The weight of the stopper 14 is preferably such that the chain 13 is automatically pulled down when the lid is closed.

[0011]

As described above, according to the present invention, the degree of freedom of the opening position of the manhole cover is increased, and the installation position of the manhole is not affected by the means for opening the cover. Further, there is a benefit that the easiness of opening and closing the existing manhole cover can be improved only by replacing the hinge body with the existing hinge.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing the structure of a conventional hinge and its use state.

FIG. 2 is a plan view showing an open state of a manhole cover when a conventional hinge is used.

FIG. 3 is a partial cross-sectional view of one embodiment of the present invention.

FIG. 4 is a side view of a different embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hook part 2 Cross-shaped locking part 3 Hinge 4 Manhole cover 5 Manhole cover receiving frame 6 Annular stopper 7 Hinge body 8 Projection shaft 9 Wire 10 Stopper 11 U-shaped bolt 12 Nut 13 Chain 14 Stopper

Claims (1)

[Claims] 1. A connecting cable of an arbitrary length provided with a weight / stopper at an end thereof is attached to a lower portion of a main body provided with a hook portion engaging with an engaging portion provided on an inner wall of a manhole cover receiving frame in a tail shape. A hinge for a manhole cover, characterized in that: