JPH05280066A - Manhole cover for construction - Google Patents

Abstract

PURPOSE:To allow traffic of vehicles and the like and set a construction area as small as possible, even when a manhole positioned on the lane of a road and the like is extended over the construction area. CONSTITUTION:In a cover main body 2 consisting of a plate body with which the opening part of a manhole can be closed, freely, a part of the cover main body 2 is cut off, the separated plate 3 which is cut off is rotationally movably connected to the cover main body 2 through a hinge 4 or the like. Further, the separated plate 3 is constituted so as to have good gas permeability through the upper and lower sides in some case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole cover capable of closing an opening of a construction manhole.

[0002]

2. Description of the Related Art At an underground line construction site, a manhole 30 may be located above a central lane 32 of two lanes on one side of a road 31, as shown in FIG.
Often it will be necessary to open the lid. In this case, when the lid of the manhole 30 is opened, the construction area 33 straddles the two lanes on one side and all the two lanes on one side are closed, or the central separating strip 34 is scraped to secure one lane. It is being appreciated.

[0003]

However, it is extremely inconvenient for one side to be closed during the construction period, which may hinder the passage of general vehicles. Further, it takes a great deal of labor and enormous cost to secure the lane of a certain width by cutting the central separating strip 35.

The present invention has been made in view of these points, and even when a manhole located on a lane or the like extends over a construction area, a vehicle or the like can pass therethrough,
An object of the present invention is to solve the above-mentioned problems by providing a construction manhole cover that can make a construction area as small as possible.

[0005]

SUMMARY OF THE INVENTION Therefore, according to the present invention, in a lid body composed of a plate body capable of closing an opening of a manhole, a part of the lid body is cut off, and the separated separation plate is hinged or hinged. It is rotatably connected to. Further, a part of the lid main body is cut out, and a separation plate having substantially the same shape and size as the cutout is rotatably connected to the lid main body by a hinge or a hinge. In some cases, the configuration may be improved.

[0006]

This manhole cover is fitted in the opening of the manhole that extends over the construction area, and the separating plate is rotated to stand up with respect to the main body of the cover to partially open the opening of the manhole. Insert a ventilation duct from a blower installed on the ground, an appropriate electric wire, a communication cable, etc. into the manhole. At this time, it is possible to cover the openings as much as possible by putting the above-mentioned separation plate on the outer periphery of these air ducts and the like.

On the other hand, the lid body is fitted in a part of the opening of the manhole and has a surface substantially the same as the road surface, so that a vehicle or the like can pass over it. Further, in the case where the separating plate is provided in a ventilation duct or the like so as to cover the opening, even if an appropriate fallen object due to an impact is applied to the separating plate when a vehicle or the like passes near the lid body, A falling object hits and it is difficult for the falling object to fall into the manhole.

Further, in the case where the separating plate is constructed to have good air permeability, even if the separating plate covers the opening of the manhole, the manhole does not become oxygen deficient because of the air permeability.
Furthermore, the inside can be seen through from the inside worker and the outside from the outside.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

A lid body 2 made of a semi-circular steel plate is fixed to approximately half of the inside of the steel annular frame body 1, and a semi-circular lattice-like frame body is provided to the other half of the frame body 1. Fit the separation plate 3 consisting of
The separating plate 3 and the lid main body 2 are connected by a hinge 4 provided at an appropriate position on the edge where they are in contact with each other, and the separating plate 3 is rotatable with respect to the lid main body 2.

A lattice-shaped reinforcing frame 5 is provided on the back surface of the lid body 2.
, And the reinforcing pieces 6 are obliquely provided from both sides of the connecting edge of the lid main body 2 with the separating plate 3 toward the frame body 1. On each of these reinforcing pieces 6, a part of the separating plate 3 is attached. Is formed. Further, a through hole 7 for an electric wire or the like is provided in the center of the separating plate 3. Further, a threaded hole 8 for an eyebolt for lifting is provided at a central portion of the lid body 2 with a gap.

In the case of this embodiment, as shown in FIG. 4, when the manhole 9 is located above the center lane 11 of the two lanes on one side of the road 10, the manhole 9 is opened and a worker or the like opens the manhole. After entering, the construction manhole cover of the above embodiment is fitted into the opening of the manhole 9. Then, the separation plate 3 is rotated to open a part of the opening, and the blower duct 12 is inserted into the manhole 9 from that portion as shown in FIG. 5, and the separation plate 3 is provided on the outer periphery of the blower duct 12. Leave it with a free end.

By locating the portion of the lid main body 2 on another lane which is not the construction area as shown in FIG. 4, the construction area 13 is limited to one lane and does not reach the other lanes. Moreover, a vehicle or the like can pass over the lid body 2.

Even if there is a fallen object in the manhole 9 due to the passage of these vehicles or the like, if the separating plate 3 is inclined as described above so as to cover the opening as much as possible, the separating plate 3 will be covered. This falling object hits and does not fall into the manhole 9. Further, in the case of this embodiment, since the separating plate 3 is composed of the lattice-shaped frame body, the air permeability is good, and even if the separating plate 3 covers the opening, the manhole 9 is unlikely to become oxygen deficient. Moreover, the inside and outside of the separating plate 3 can be seen through, which is convenient.

Further, in the above embodiment, the circular plate is divided into two, one is the lid main body 2 and the other is the separating plate 3, and the separating plate 3 made of the plate is connected to the lid main body 2. good.

[0032]

By fitting the manhole cover of the present invention into the opening of the manhole under construction, the separating plate is rotated and opened with respect to the cover body, and a ventilation duct or the like is inserted into the manhole from this partial opening. It can be inserted and a vehicle etc. can pass over the lid body. Therefore, if this manhole cover is used for a manhole under construction, the construction area can be narrowed and the obstruction of traffic such as vehicles can be minimized.

If the separating plate is erected with respect to the lid body, it serves as a fence for a vehicle passing over the lid body and can prevent passage of some openings. In addition, if the separation plate is tilted so that part of the opening is covered as much as possible,
It is safe because the falling objects from the outside hit the separation plate and the falling objects do not fall into the manhole.

Further, in the case where the separating plate is constructed to have good air permeability, even if the separating plate covers the opening of the manhole, the manhole does not become oxygen deficient because of its air permeability, and further There is an effect that the outside can be seen from the operator and the inside can be seen from the outside.

[Brief description of drawings]

FIG. 1 is a perspective view of a manhole cover of the present invention.

FIG. 2 is a perspective view of the manhole cover according to the present invention in which a separation plate is opened.

FIG. 3 is a bottom view of the manhole cover of the present invention.

FIG. 4 is a sectional view showing a usage state of the manhole cover of the present invention.

FIG. 5 is a plan view of a road under construction using the manhole cover of the present invention.

[Figure 6] Plan view of a conventional road under construction

[Explanation of symbols]

 1 Frame 2 Lid body 3 Separation plate 4 Hinge

Claims (2)

[Claims] 1. A lid body composed of a plate body capable of closing an opening of a manhole, wherein a part of the lid body is cut off, and the separating plate is rotatably connected to the lid body by a hinge or a hinge. A characteristic manhole cover for construction. 2. A lid main body comprising a plate body capable of closing an opening of a manhole, wherein a part of the lid main body is cut out, and a separation plate having substantially the same shape and size as the cutout is hinged or hinged to the lid main body. A manhole cover for construction, characterized by being rotatably connected to each other and having a structure in which the upper and lower surfaces of the separating plate have good air permeability.