JP2001348899A - Bar cover for manhole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manhole having excellent airtightness. SOLUTION: A blocking cover 2 is mounted to a locking body 4, and the locking body 4 is provided with a rotary shaft 1 so as to be laterally movable. In this structure, an error caused by circular arcs described by the rotating movement of the locking body 4 and the rotating movement of the blocking cover 2 can be canceled. The blocking cover 2 is rotated in the circular arc around the rotary shaft 1. The lateral movement of the blocking cover 2 by the movement error portion results in the rotation of the blocking cover 2 in an apparent design position in spite of the circular arc to nullify the clearance of the blocking cover.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The manhole burl cover of the present invention is mounted on a manhole often seen on the road, and is framed on the ground cover of a structure buried underground, such as water and sewage, gas, electricity, and telephone. Use together with. When confidentiality of a manhole is required, the fixed lid type as shown in FIG. That is, the closing lid 2 turns in an arc. Therefore, if the rotating shaft 1 can move freely in the horizontal direction even when it turns into an arc, the position of the closing lid 2 has apparently moved, and a manhole with good blocking properties can be made.

[0002]

2. Description of the Related Art Many conventional manhole cover closures are closed by leverage utilizing weights as shown in FIG. 2, but it is structurally impossible to eliminate the gap between closure cover 2. It is. According to the present invention, since the rotating shaft 1 of the lock body 4 is moved in the lateral direction and the arc error of the closing lid 2 can be apparently canceled, a closing lid with no gap can be realized.

[0003]

SUMMARY OF THE INVENTION Manholes have been installed for maintenance of underground structures, have been locked so that they cannot be opened without permission, and have evolved into safe manholes. The need for higher quality and confidential manholes has led to the need for confidential manhole holes. Therefore, a device that can keep the burl hole confidential while having a simple structure is needed.

[0004]

[Operation] The lock body 4 rotates in an arc around the rotation shaft 1. If the closing lid 2 moves sideways by the moved error, the closing lid 2 will apparently rotate the design position while having an arc shape. This is important and is essential to eliminate gaps in the closure lid. This is characterized in that it can be moved in the lateral direction of the rotating shaft 1. The same effect can be obtained with either a weight type or a spring type with these bodies, forcibly moving them with something like a gear, getting entangled like a spring,
Although it is possible to move the camshaft or the like decentered, these are included in the present invention. The structure is simple and can be used for conventional manholes.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows a conventional closing lid and lock using a weight for easy understanding. The present invention will be described in an easy-to-understand manner, and is a description of the relationship between the closing lid 2 and the lock body 4 and the structure of the engagement receiver 8 of the frame 7. It is possible to explain the gap created by the closing lid 2 because it turns in an arc around the fixed shaft 3. When the cover of the manhole of FIG. 1 is attached, the closing cover 2 and the lock body 4 are moved by the movement of the dedicated bar. Although there is already an object in which the rotating shaft 1 can move downward, this structure is different because it moves sideways and apparently moves the closing lid 2.

[0006]

EFFECTS OF THE INVENTION Obstruction lids with gaps are sand mud, pebbles and rainwater,
In addition, it is possible to inject a volatile liquid through a gap with malicious intent, and there is a possibility of odor leakage and explosion. Infiltration of industrial waste etc. is also possible, and a closed lid with no gap is required.
In the case of sewage, the cost of purification treatment is high, and excess unknown water becomes a problem. It is a manhole bur lid that can be expected to be effective in these problems. Still further, the lock body 4 can be locked with a dedicated key or the like, and in that case, a device for preventing illegal dumping is also possible. Although not shown here, it is needless to say that a material with good obstruction can easily prevent illegal dumping.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram drawn in an easy-to-understand manner, showing that the lock body 4 and the closing lid 2 move while the burl 10 moves. The important thing was that it was possible to open and close and lock it without any gaps. I have refrained from showing the accompanying but hard-to-see objects. The bar operation proceeds from the top left to the bottom, but the center on the right is 9
An angle different by 0 degrees will be described. The lower right explains the moment you pry up. Pulling it up in that state will open the manhole cover. There are various types of closure lids, but corresponding ones can be made, so they can be used for most manholes. Since no manufacturing cost is required, the quality of the manhole can be improved.

FIG. 2 is a view for explaining a conventional structure.
Explain that there is a gap problem.

[Explanation of symbols]

1 Rotation axis. 2 Closure lid. 3 Fixed axis.
4 Lock body. 5 Spring. 6 nails.
7 frames. 8 Engage receiving. 9 Lid.
10 bar.

Claims (1)

[Claims] An obstruction cover is attached to a lock body, and a rotation shaft is provided on the lock body so that the lock body can be freely moved in a lateral direction. With this structure, it is possible to cancel an error caused by the circular movement of the rotation movement of the lock body 4 and the rotation movement of the closing lid 2, and it is possible to make a manhole with good blocking properties. A device having this structure is called a manhole cover, and provides a simple yet high-performance manhole.