JPH0885966A - Lid for underground structure - Google Patents

Abstract

PURPOSE: To allow specified operations to be done upon opening lids of any construction by furnishing a plurality of gratings mating with respective lids between sash members, wherein each grating has openings not admitting penetration of the lid. CONSTITUTION: A lid 1 is split in four segments in the longitudinal direction of a rectangle and placed on a frame F around an opening O. Aux. members 2a-2c are installed removably on the frame F under the place where the lids S1-S4 are joined with one another, and gratings 3a-3d are furnished under the respective lid segments. Longitudinal members 5a-5c are installed parallel so that the openings O are divided at equal intervals, and the size of the opening of each grating is determined so that the lid segment does not drop. In performing the operations, the lid segments are opened, and the gratings are removed, and if necessary, the aux. members are removed. After finishing, the aux. members are set on the frame, and the gratings are set on the frame and aux. members, and the lids are placed on the frame. At the time all lids should not necessarily be opened. for example at maintenance or inspection, it may also be accepted that the applicable lid(s) is opened and the corresponding grating is removed to admit coming-in and going-out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid for an underground structure used for an underground structure such as a common groove when an electric wire or a gas pipe is laid underground.

[0002]

2. Description of the Related Art FIG. 4 is a plan view of a conventional underground structure lid (hereinafter referred to as lid) 20 provided in a common ditch, and FIG. 5 is an enlarged sectional view taken along line CC of FIG. It is provided on the road surface G in the form of a rectangle having a longitudinal direction of about 2 m and a width direction of about 60 cm.

The lid 20 is divided into four pieces in a direction orthogonal to the longitudinal direction in a frame F provided around an opening O provided in the upper wall of the common groove, and the lid body S has a substantially square shape.
1 to S4 are mounted. Each lid S
1 to S4 (S1 is omitted in FIG. 4) are made of cast iron each having a concave portion in the central portion, and each concave portion is filled with a filling material B such as a brick that matches the surrounding road surface G. .

Reference numeral 21 in the drawing denotes a lattice member, and each lid S
Five cauldrons 22a to 22e, which are placed below 1 to S4 and on the frame F, are provided at the boundary portions of the lids S1 to S4 and at the left and right ends, and these cauldrons. It is composed of three longitudinal members 23a to 23c provided between them.

Each of the longitudinal members 23a to 23c has an opening O.
Are provided so as to be parallel to each other so as to be divided into substantially equal intervals. Then, at least the size of the openings of the grid member 21 (the openings formed by the respective rod members 22a to 22e and the long members 23a to 23c) is at least one of the lids S1 to S4.
Is designed not to fall.

In the lid 20 having the above-mentioned structure, when the lid 20 is opened to perform the installation work or maintenance inspection of the electric wire or the like, first, the keyholes S'and S'provided in the lids S1 to S4 are not shown. A key rod is inserted to open each lid S1 to S2, and then the lattice member 21 is removed to perform a predetermined work. After the work is completed, the grid member 21 is set on the frame F, and then the lids S1 to S4 are placed on the frame F and hermetically sealed.

[0007]

However, the above-mentioned conventional lid has a drawback that it is difficult to work because it has one lattice member for a plurality of lids.

For example, unlike when performing work such as laying an electric wire in a common groove, even when an operator goes in and out just for maintenance, it is necessary to remove all the lids and then remove the lattice member. Is.

In order to solve such a drawback, it is conceivable to omit the lattice member. However, if this lattice member is omitted, since the filling material such as bricks is filled, the weight thereof is about 100 kg. If the covering lid falls, it may cause accidental damage to structures such as electric wires and gas pipes. Therefore, this lattice member is an indispensable member.

Further, since the lattice member is large in size and extends over a plurality of lids, it is inconvenient for a plurality of workers to handle it.

Therefore, the present invention has been made to solve the above-mentioned drawbacks, and an object thereof is to provide a lid capable of improving workability.

[0012]

In order to achieve the above-mentioned object, a lid according to the present invention has a longitudinal shape corresponding to the peripheral shape of a rectangular opening provided on the upper wall of an underground structure such as a common groove. A frame composed of a directional member and a width direction member, a plurality of lids sectioned along the longitudinal direction of the rectangle and placed on the frame so as to cover the opening, and each of the lids is the frame. An auxiliary member bridged from one longitudinal member of the frame to the other longitudinal member below the respective lids when they are placed on each other, and one widthwise member of the frame. A plurality of grid members that are provided between the auxiliary members or between the auxiliary members and that have openings of a size that does not allow the lids to penetrate, and that are provided corresponding to the respective lids. Is characterized by. In addition, the auxiliary member is provided so as to be detachable.

[0013]

In the above structure, the lattice members corresponding to the respective lids are provided below the respective lids.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view of a lid 1 according to one embodiment, and FIG. 2 is a plan view of FIG.
3 is an enlarged sectional view taken along line AA of FIG. 3, and FIG. 3 is an enlarged sectional view taken along line BB of FIG. In addition, the same components as those of the above-described conventional device will be described with the same reference numerals.

The lid 1 is provided on the road surface G in the form of a rectangle having a longitudinal direction of about 2 m and a width of about 60 cm, for example.
Then, the lid 1 is divided into four pieces along the longitudinal direction of the rectangle (direction orthogonal to the longitudinal direction of the rectangle) in the frame F provided around the opening O provided in the upper wall of the common groove. Then, the lids S1 to S4 having a substantially square shape are mounted. Each lid S1 to S4 (S in FIG. 1
1 is omitted) is made of cast iron having a concave portion at the center thereof, and each concave portion is filled with a filling material B such as brick that matches the surrounding road surface G.

In the figure, 2a to 2c are auxiliary members,
The lids S1 to S4 are detachably provided on a lower frame F which is joined to each other. The auxiliary member 2b at the central portion is screwed by a screw 2b '. of course,
The other auxiliary members 2a and 2c may also be screwed.

In the figure, 3a to 3d are lattice members, which are provided below the lids S1 to S4 and corresponding to the lids S1 to S4, respectively. That is, the lattice members 3a located on both sides are the frame F and the auxiliary member 2a.
The grid member 3d is placed on the frame F and the auxiliary member 3d, respectively. The lattice member 3b located on the right side of the two lattice members 3b and 3c in the center is the auxiliary member 2a and the auxiliary member 2b.
The lattice member 3c located on the upper side and on the left side is placed and provided between the auxiliary member 2b and the auxiliary member 2c, respectively.

Each of the grid members 3a to 3d has a rod material 4a and 4b on both sides, and is composed of three longitudinal members 5a to 5c provided between the rod materials 4a and 4b, respectively.

The longitudinal members 5a to 5c are provided so as to be parallel to each other so as to divide the opening O into substantially equal intervals. And at least each of the lattice members 3a to 3d
The size of the openings (openings formed by the respective rod members 4a and 4b and the longitudinal members 5a to 5c) is determined so that the respective lids S1 to S4 do not fall.

In the lid 1 having the above structure, the lid 1 is opened,
For example, when installing electric wires, first, each lid S
Key bars (not shown) are inserted into the keyholes S'and S'provided in 1 to S4 to open the respective lids S1 to S4, and then the respective lattice members 3a to 3d are removed, and the auxiliary member 2a as required. ~
2c is removed and a predetermined work is performed. After the work is completed, the auxiliary members 2a to 2c are set on the frame F, then the lattice members 3a to 3d are set on the frame F and the auxiliary members 2a to 2c, and then the lids S1 to S4 are set. Place on frame F and seal.

When it is not necessary to open all the lids as in the case of maintenance and inspection, for example, only the lid S1 or the lids S1 and S2 are opened, and then the lattice member 3a or the lattice member 3a. , 3b can be removed to enter the common groove.

As described above, in the lid 1 according to this embodiment, the worker or the article can be put in and out without opening all the lids S1 to S4, so that the workability can be improved and the lattice member can be used. Since 3a to 3d are also downsized, there is a feature that they are easy to handle. Moreover, the auxiliary member 2a-
Since 2c is removable, there is an advantage that large articles can be easily put in and out.

In the above embodiment, the number of lids is four, but it may be five or more, or two or three.

[0024]

The lid according to the present invention includes a frame composed of a longitudinal member and a width member corresponding to the peripheral shape of a rectangular opening provided on the upper wall of an underground structure such as a common ditch, A plurality of lids that are sectioned along the longitudinal direction of the rectangle and are placed on the frame so as to cover the opening, and the lids when the lids are placed on the frame are mutually The auxiliary member that is bridged from one longitudinal member of the frame to the other longitudinal member of the frame, and between the one widthwise member of the frame and the auxiliary member, or between the auxiliary members. And a plurality of grid members provided corresponding to the respective lids, each of which has an opening of a size that does not allow the lids to penetrate therethrough, and therefore any lid does not have to be opened. Open and close workers and articles in and out Can, it is possible to improve the workability. Further, when the auxiliary member is detachably provided, it is convenient for the entry and exit of large articles.

[Brief description of drawings]

FIG. 1 is a plan view of a lid according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view taken along line BB of FIG.

FIG. 4 is a plan view of a conventional lid.

5 is an enlarged cross-sectional view taken along line CC of FIG.

[Explanation of symbols]

 1 Underground structure lid (lid) 2a to 2c Auxiliary member 3a to 3d Lid body 4a to 4b Rod material 5a to 5c Longitudinal material S1 to S4 Lid body G Road surface O Opening B Filling material (brick)

Claims (2)

[Claims] 1. A frame comprising a longitudinal member and a width member corresponding to the peripheral shape of a rectangular opening provided on the upper wall of an underground structure such as a common ditch, and along the longitudinal direction of the rectangle. A plurality of lids placed on the frame so as to cover the opening, and below the joints between the lids when the lids are placed on the frame. An auxiliary member bridged from one longitudinal member of the frame to the other longitudinal member, and placed between one widthwise member of the frame and the auxiliary member or between the auxiliary members, and their lids And a plurality of lattice members respectively provided corresponding to the respective lids, each of which has an opening of a size that does not penetrate through the lid for underground structure. 2. The lid for an underground structure according to claim 1, wherein the auxiliary member is detachably provided.