JPH0732601Y2 - Underground box for underground power line - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial field of application] This invention is for the introduction of underground power lines.
The present invention relates to an underground box for underground electric lines, which has an improved knockout portion which is a connection port with an underground tube for an underground box such as a manhole or a handhole to be buried underground for branching or other purposes.

[0002]

2. Description of the Related Art Buried boxes such as manholes and handholes are connected to underground pipes for guiding cables to guide and branch cables. The burial 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 an underground burial pipe. Further, the connecting portion is formed to be slightly thinner than the side wall itself, and the necessary portion is crushed and opened in a predetermined size corresponding to the connecting 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 or the like.

[0003]

However, in the conventional knock-out structure connecting portion, the entire portion to which the underground buried pipe is connected is thinly formed. The pipe cannot be opened exactly according to the diameter and size of the middle buried pipe, and the outer part is partially broken or the inner part is left. As a result, it may be difficult to fit the end of the underground pipe into the opening part properly, which may result in the infiltration of moisture in the soil or the intrusion of earth and sand into the box. .

Therefore, the present invention has been devised in view of various existing circumstances as described above, and a knockout which is a connection port formed by crushing and opening at a connection portion partitioned and formed on the side wall. The purpose of the present invention is to provide a buried box for an underground power line in which the end portion can be obtained as a well-defined shape, and the end of the underground buried pipe can be securely inserted and fixed. To do.

[0005]

In order to achieve the above-mentioned object, according to the present invention, a ground to be connected is formed in a connecting portion 2 defined by a peripheral side wall of a buried box body 1 buried in the ground. A loop-shaped strip-shaped crushing guide groove 3 is formed along the outer edge of the area to be crushed and opened corresponding to the middle buried pipe P,
The area surrounded by the crushing guide groove 3 is characterized as a knockout portion 4.

The crushing guide groove 3 can be constructed to have a substantially V-shaped cross section, and another small knockout portion 4 can be formed in an array inside the knockout portion 4.

[0007]

In the buried box for an underground electric line according to the present invention, the loop-line-shaped crushing guide groove 3 formed in the connection portion 2 surrounds the knockout portion 4 and the inside of the knockout portion 4. It separates from the outside of this.

When the knockout portion 4 is crushed and opened, and the crushing action from the inside of the knockout portion 4 tries to extend outward from the center side of the knockout portion 4, the crushing guide groove 3 stops the crushing action of extending outwardly. Only the inside of the knockout portion 4 surrounded by the fracture guide groove 3 is opened.

The fracturing guide groove 3 having a substantially V-shaped cross section divides the inside and outside of the knockout portion 4 into a neat section, cleans the outer edge of the knockout section 4, and makes the appearance of the connection opening with the fracture opening good.

The plurality of knockout parts 4 of different sizes are
Allows selection corresponding to the underground pipe P to be connected,
Unnecessary openings are not formed in the peripheral side wall.

[0011]

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 underground power lines which is laid in the ground. , A buried box body such as a manhole or a handhole that is buried in the ground by connecting it for the entry, branching, etc. of cables that will be underground power lines. The buried box main body 1 itself in the illustrated example is also one in which front, rear, left and right side walls are erected on the periphery of a bottom side wall having a substantially rectangular plane shape, and is formed in a substantially rectangular parallelepiped shape of the upper opening (FIG. Of course, the buried box body 1 itself may be formed in a cylindrical shape or another shape. Further, by forming the burying box main body 1 itself in a tapered shape in which the bottom is slightly smaller than the top, it is possible to facilitate excavation and dropping at the installation site and improve the efficiency of the burying work.

On the peripheral side wall of the buried box body 1, a thin-walled connecting portion 2 for connecting the underground buried pipe P is defined. The connecting portion 2 is formed on the peripheral side wall as shown in the drawing. Although it is formed by denting the outer surface side, although not shown, it may be formed by denting the inner surface side.

Then, in the connecting portion 2, the diameter of the underground buried pipe P is provided at a portion where the underground buried pipe P is directly connected,
According to the shape, forming a crush guide groove 3 in the form of a loop line along the outer edge of the area to be crushed (knock out),
The area surrounded by the crushing guide groove 3 serves as a knockout portion 4. The crushing guide groove 3 defines a knockout portion 4 which is an area to be crushed and opened corresponding to the underground buried pipe P to be connected and an area which is left unopened and is connected to the underground buried pipe P. The loop line has a circular shape corresponding to the outer edge of the opening shape.
The knockout parts 4 themselves are arranged in the connection part 2 in a plurality of numbers corresponding to the number of underground pipes P to be connected.

Further, as shown in FIG. 1, the crushing guide groove 3 itself is formed in a substantially V-shape in cross section, so that it can exactly correspond to the outer edge line of the opening area to be crushed and the appearance of the crushing edge. To be good. Of course, this crush guide groove 3
The cross-sectional shape of is not limited to this illustrated example, and may be a U-shape, a square U-shape or the like.

Further, the crushing guide groove 3 is formed as a loop line corresponding to the maximum diameter of the underground buried pipe P to be connected, as shown in FIG. The crushing guide groove 3 itself is not limited to being formed on the outer surface side of the peripheral side wall in the recessed connecting portion 2, but should be formed on the inner surface side of the peripheral side wall which is a flat surface, and on both inner and outer surfaces. It is also possible to form it, and the point is that it is sufficient if it is formed on at least one of the inner and outer surfaces of the connection portion 2 corresponding to the crushing edge of the site to be crushed and opened.

The embodiment shown in FIG. 3 is an example in which a plurality of knockout portions 4 are arranged and formed so as to interfere with each other. For example, concentric circles are formed inside the large diameter knockout portion 4. In this manner, another knockout portion 4 having a small diameter is formed, or a plurality of knockout portions 4 having small diameters and different diameters are formed inside the large diameter knockout portion 4. Although not shown, the respective crushing guide grooves 3 forming the plurality of knockout portions 4 may be in a form in which the respective loop filaments intersect with each other depending on the arrangement form of the knockout portions 4, These can be appropriately selected and formed depending on the size and shape of the diameter of the underground buried pipe P, the position to be connected, and the like.

Next, an example of use of the burying box of the present invention will be described. When burying in a predetermined installation place, a predetermined loop of the connecting portion 2 corresponding to a connection site in the underground burying pipe P to be connected. The inside area of the knockout portion 4 surrounded by the crushing guide groove 3 of the filament is crushed and opened by a hammer or other striking tool. At this time, underground pipe P
Knockout part 4 of appropriate size according to the caliber of
And crush all or part of the inside surrounded by the crushing guide groove 3. Then, the end portion of the underground buried pipe P is inserted into the crushed opening, and a putty material for closing a gap or the like is filled and fixed.

[0018]

The present invention is constructed as described above, and for this reason, the knockout portion 4 formed by the crushing opening is crushed and guided in the connecting portion 2 defined by the peripheral side wall of the buried box body 1. It can be obtained as a tight predetermined shape having a contour line along the groove 3, so that the end portion of the underground buried pipe P can be securely inserted and fixed, and this P can be firmly fixed.

That is, in the present invention, this is a loop line shape along the outer edge of the area to be crushed and opened corresponding to the underground buried pipe P in the connecting portion 2 of the peripheral side wall of the buried box body 1. The crushing guide groove 3 is formed.
This is because the area surrounded by is the knockout portion 4, and when the inside of the knockout portion 4 is crushed, the crushing action does not extend outward due to the crushing guide groove 3, and only the inside of the knockout portion 4 can be opened. Is. Further, the fracturing guide groove 3 formed in the connecting portion 2 in a groove shape indicates the region of the knockout portion 4 to be opened for fracturing, and the pipe line position is clarified, so that the work can be efficiently performed. it can.

Further, since the crushing guide groove 3 has a substantially V-shaped cross section, when the inside of the knockout part 4 is crushed, the rim of the knockout part 4 which is the outer edge to be crushed is made clear, and an opening is formed. Improve the appearance of the connection port. Therefore, a fixed state is ensured when the space between the end of the underground buried pipe P inserted and mounted in the connection port is filled and blocked with putty material or the like, and infiltration of moisture in the soil into the interior of the buried box body 1 It is also effective in preventing other intrusions.

Not only that, but when a plurality of knockout parts 4 of different sizes are arranged by another small knockout part 4 formed inside the knockout part 4, those knockout parts 4 corresponding to the underground buried pipe P to be connected are arranged. Any one of the above is selected, and there is an advantage that various situations at the pipe connection site can be dealt with, and that unnecessary openings are not formed in the peripheral side wall.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part.

FIG. 2 is a perspective view of the entire box.

FIG. 3 is a perspective view of a main part in another embodiment.

[Explanation of symbols]

P underground pipe 1 buried box body 2 connection part 3 crush guide groove 4 knockout part

Claims (3)

[Scope of utility model registration request] 1. A loop filament along an outer edge of a region to be crushed and opened corresponding to an underground pipe to be connected, in a connecting portion defined on a peripheral side wall of a buried box main body to be buried in the ground. An underground power line buried box, characterized in that a crushing guide groove is formed, and an area surrounded by the crushing guide groove is used as a knockout portion. 2. The buried box for an underground electric line according to claim 1, wherein the crushing guide groove has a substantially V-shaped cross section. 3. The buried box for an underground electric line according to claim 1, wherein another small knockout portion is formed in an array inside the knockout portion.