JPH079036U - Underground box for underground power line - Google Patents

Abstract

(57) [Abstract] [Purpose] A reinforced plastic material-made obturator mounted on the side wall can be opened by an opening tool to ensure insertion and attachment to the end of the underground pipe. [Structure] On a peripheral side wall of an embedding box body 1 to be buried in the ground, a closing board 2 made of a thin reinforced plastic material that can be opened by an opening tool T such as a hole saw is provided. On the surface of the closing board 2, a dimension display line 4 for displaying the opening position of the connection port 3 to be opened corresponding to the underground pipe P to be connected,
Opening center display point 5 indicating the center position of the connection port 3 to be opened
Is displayed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is based on the improvement of the knockout part that is the connection port with the underground pipe in the buried box such as manholes and handholes that are buried in the ground for the entry and branching of underground power lines. The buried box for medium power lines.

[0002]

[Prior art]

 Buried boxes such as manholes and handholes are connected to underground pipes that guide the cables, and lead in, branch, etc. of the cables. The buried box itself has a bottomed tubular shape with an upper opening, and has a substantially rectangular or circular shape when viewed from the top, and a side wall is provided with a connecting portion for connecting a buried pipe. In addition, the connection part is formed to be slightly thinner than the side wall itself, and the necessary part is crushed with a predetermined size corresponding to the connection position with the underground buried pipe and the diameter of the underground buried pipe. It has a knockout structure, and the gap after connection is filled with putty.

[0003]

[Problems to be solved by the device]

 However, in the conventional knockout structure, even if the entire area where the underground pipe is connected is made thin, it is necessary to use a heavy tool such as a concrete drill to crush and open it. . Moreover, the connection port formed by crushing opening cannot be opened exactly in accordance with the diameter and size of the underground pipe to be connected, and the outer part may be partially broken or the inner part remains. It is something that has been done. For this reason, it may be difficult to insert the end of the underground pipe into the opening part properly, and eventually moisture in the soil or sand or sand may enter the box. It was.

Therefore, the present invention has been devised in view of the existing circumstances as described above, in which the connection portion itself formed by partitioning the side wall is formed as a closing plate made of reinforced plastics. The knockout part, which is a connection port, can be obtained as a tightly shaped part by forming an opening with a specified puncture tool at the required obturator site, and the end of the underground buried pipe can be obtained. It is an object of the present invention to provide a buried box for an underground electric line, which can be securely inserted and securely fixed.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, according to the present invention, a closing plate 2 made of a reinforced plastic material, in which a connection port 3 can be opened, is provided on a peripheral side wall of a buried box body 1 buried in the ground. It is characterized by having done.

Further, on the surface of the closing board 2, there are at least an appropriate number of dimension display lines 4 along the vertical direction and the horizontal direction or an open / close center display point 5 indicating the center position of the connection port 3 to be opened. It can be configured by displaying the difference.

[0007]

[Action]

 In the buried box for an underground electric line according to the present invention, the closing board 2 arranged on the surrounding side wall of the buried box body 1 withstands earth pressure when the buried box body 1 is buried, and the buried box. The connection state between the main body 1 and the underground conduit P is maintained.

The closing board 2 itself is opened by the opening device T to form a connection port 3 having a predetermined diameter corresponding to the connection of the underground wiring conduit P, and the underground wiring conduit P is formed. Make sure to connect with.

The dimensional display line 4 and the center of puncture display point 5 on the surface of the closing board 2 serve as a mark of the piercing position of the connection port 3 to be pierced so that the connection port 3 with the underground conduit P can be supported. .

[0010]

【Example】

 BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. In the drawings, reference numeral 1 indicates an underground buried pipe P for an underground power line which is laid in the ground, and an underground cable. It is a buried box body such as a manhole or handhole that is buried in the ground by connecting it for the entry of cables, branching, etc. In the illustrated example, the buried box body 1 itself is formed by arranging front, rear, left and right side walls on the periphery of a bottom side wall having a substantially rectangular shape in plan view, and is formed in a substantially rectangular parallelepiped shape with an upper opening (Fig. 1)), of course, the buried box body 1 itself may be formed in a cylindrical shape or another shape. Further, by forming the burying box body 1 itself in a taper shape in which the bottom is slightly smaller than the top, it is possible to facilitate excavation at the installation site and improve the efficiency of burial work. .

On the peripheral side wall of the burying box body 1, a thin reinforced plastic (FRP) closing plate 2 for connecting the underground burying pipe P is disposed so as to be exposed. The closing board 2 is formed thinner than the wall thickness of the peripheral side wall as shown in the figure, and the peripheral edge thereof is embedded in the peripheral side wall itself (see FIG. 2), so that the center of each peripheral side wall is Although not shown in the drawings, it may be offset so as to be flush with the outer surface or inner surface of the peripheral side wall.

The closing plate 2 itself has a connection port 3 for directly connecting the underground pipe P which is opened by a predetermined opening / closing tool T such as a so-called hole saw. The opening diameter of the puncture tool T corresponds to the diameter and shape of the underground buried pipe P. Therefore, a proper number of dimension indicating lines 4 along the vertical and horizontal directions are formed on the surface of the closing board 2 as ridges or grooves to be displayed in a streak shape, or the central position of the connection port 3 to be opened. The point-shaped open / drilled center display point 5 indicating “” is displayed in a concave shape. It is sufficient that at least one of these dimensional display line 4 and open / close center display point 5 is displayed, and the open / close center position of the connection port 3 for connecting the underground buried pipe P is clearly indicated in advance. As long as it is a thing, it is not necessary to have the stripe shape or the dot shape as shown in the drawing, and it can be appropriately changed to a circular shape or another shape.

Next, to explain an example of use of the burying box according to the present invention, when burying in a predetermined installation place, the connection port 3 is opened corresponding to the connection site in the underground burying pipe P to be connected. At the time of puncturing, the connection port 3 having a predetermined shape is opened by the piercing tool T with the dimension indicating line 4 or the puncturing center indicating point 5 on the surface of the obturator 2 as a mark (see FIG. 1). Next, the end of the underground pipe P is inserted into the opened connection port 3 and is filled with putty material or the like that closes the gap, or a bushing or the like fitted in the connection port 3 is interposed. Then, it is inserted and fixed.

[0014]

[Effect of device]

 The present invention is configured as described above. Therefore, by opening a predetermined position of the closing board 2 arranged on the peripheral side wall of the buried box body 1 with the opening / closing tool T, the underground buried pipe P is opened. The connection port 3 to be connected can be formed, the end of the underground pipe P can be securely inserted and mounted, and this P can be firmly fixed.

That is, this is because, in the present invention, the closing plate 2 made of a reinforced plastic material that can be opened is disposed on the peripheral side wall of the buried box body 1, whereby the necessary closing plate 2 is obtained. This is because the knockout portion, which is the connection port 3, can be opened and formed at a site with a predetermined piercing tool T.

Further, since the dimension display line 4 and the opening / drilling center display point 5 are displayed on the surface of the closing board 2, these 4 and 5 serve as marks of the opening / closing position where the connection port 3 should be opened. Therefore, the position of the underground conduit P to be connected can be easily adjusted. In particular, the dimension display line 4 allows the pipeline interval of the underground buried pipe P to be easily selected at the site, and is combined with the fact that the piercing tool T such as a lightweight hole saw is used for piercing. Since the gauge plate eliminates the need for the center punch of the drill, the working time can be greatly reduced.

The connection port 3 that is opened in the obturator 2 has a clean peripheral edge by being opened by the opening device T, and the appearance of the connection port 3 formed with an opening is improved. Moreover, since the closing plate 2 itself is made of a reinforced plastic material that can be easily opened and closed, the opening and closing work can be easily performed, and the closing plate 2 can be formed into a precise circular shape. Therefore, a fixed state is ensured when the gap between the end of the underground buried pipe P inserted and mounted in the connection port 3 is filled and blocked with putty material or the like, and infiltration of moisture in the soil into the interior of the buried box main body 1, It is also effective in preventing the intrusion of earth and sand. Further, since it is sufficient that the closing board 2 itself is formed in a thin shape, after the connection port 3 is opened, the underground buried pipe P can be easily connected to the closing board 2 through the existing bushing and removed. Can be attached.

Not only that, but since the closing board 2 itself is made of a reinforced plastic material, there is no fear that it will be broken by earth pressure or the like even if it is buried in the ground as it is. By adjusting the opening diameter by using, the connection port 3 of different size can be formed, and it can be used for various situations at the pipe connection site corresponding to the diameter P of the underground pipe to be connected, and surrounding unnecessary openings. There is also an advantage that it need not be formed on the side wall.

[Brief description of drawings]

FIG. 1 is a perspective view of an entire box.

FIG. 2 is a sectional view of a main part.

[Explanation of symbols]

 P Underground buried pipe T Opening tool 1 Buried box body 2 Closure board 3 Connection port 4 Dimension display line 5 Opening / drilling center display point

Claims (3)

[Scope of utility model registration request] 1. A buried box for an underground power line, characterized in that a closing plate made of a reinforced plastic material is provided on a peripheral side wall of a buried box body to be buried in the ground so that a connection port can be opened. 2. The buried box for an underground electric line according to claim 1, wherein an appropriate number of dimension indicating lines extending in the vertical direction and the horizontal direction are displayed on the surface of the closing board. 3. The open / close center display point indicating the center position of the connection opening to be opened is displayed on the surface of the obturator.
Underground box for underground power line described.