JPH0541520B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a manhole tube provided around a pipe connected to an underground tank.

[Prior Art] As is well known, manhole pipes are installed around the points where various types of piping connected to an underground tank, such as oil supply pipes, oil supply pipes, measuring rod insertion pipes, etc., rise from the underground tank. It is being The top of this manhole tube is covered with a lid, and the lid is removed when inspecting the oil amount detection piping in the underground tank, inspecting the underground tank, etc.

The structure of conventional manhole tubes is that thin steel plates are formed into a cylindrical or rectangular tube shape in a factory, the joints are welded or riveted, and then transported and installed at a location where an underground tank is buried. I have to.

During processing, it is difficult to weld thin steel plates, and riveting them is troublesome.Furthermore, their large shape requires considerable transportation costs, and they are difficult to store and handle.

For example, the manhole described in Publication of Utility Model Publication No. 54-33128 does not have pipes passing through it, so it is sufficient to simply install the manhole, but manholes installed in positions where pipes must pass through are difficult to assemble and transport. Have difficulty.

[Problems to be Solved] Therefore, an object of the present invention is to provide a manhole tube structure that can be easily installed even in a position where a pipe penetrates, and is easy to transport and handle.

[Means for Solving the Problems] According to the present invention, in the structure of a manhole tube provided around a pipe connected to an underground tank, it is made up of a plurality of divided pieces, and the adjacent side edges of each piece are 180 mm wide. The piece is bent at an angle of 180 degrees and joined to both side edges by a joint trail bent at an angle of 180 degrees, and the piece is formed with a cutout from the bottom at a portion through which the pipe passes, and the cutout is A backing plate is welded to the inside.

[Function] Therefore, the divided pieces can be easily formed by press working, and since they are stacked to form a small shape, they are easy to store and transport, and are inexpensive and easy to handle. Then, assembly and integration can be easily performed by connecting the divided pieces with joint rails.

Since a notch is provided in advance at the place where the pipe penetrates, after assembly, the notch is aligned with the position of the pipe, the pipe is hung down, and the plate is welded and fixed from the inside.

Therefore, according to the present invention, transportation, assembly, and installation are easy, and workability is improved.

[Examples] Examples of the present invention will be described below with reference to the drawings.

In FIG. 1, a cylindrical manhole tube 1 is
It is divided into a plurality of (two in the illustrated example) pieces 2 and 3 each having a semicircular cross section, and opposing side edges of the pieces 2 and 3 are connected and integrated by a joint rail 4. Piece 2 also includes each piping, for example the oil supply pipe 1.
A notch 2c is formed downward from the penetration position shown by the chain line in FIG. 1 (FIG. 4).

In Fig. 2, the opposing side edges of pieces 2 and 3 have bent portions 2 bent by 180°, respectively.
a, 3a are formed. On the other hand, bent portions 4a, 4a are formed on both side edges of the joint rail 4, which are bent 180° and fitted between the bent portions 2a, 3a. The pieces 2 and 3 are connected and integrated by the bent portions 4a and 4a of the joint rail 4 that fit into the bent portions 2a and 3a.

In FIG. 3, the contact plate 5 is formed to have an arcuate cross section that engages with the inner surface of the piece 2, and a notch 5a is formed upward from the penetration position indicated by the chain line, and the lower edge is the lower edge of the piece 2. It is formed flush with the part.

When installing manhole pipe 1, underground tank 1
After burying 0 and connecting the oil supply pipe 11, oil supply pipe 12, and measuring stick insertion pipe 13, assemble the manhole pipe 1, align each notch with each pipe, hang it down, and weld the cover plate 5 from the inside. Fix it. Next, concrete 14 is placed on the bottom, and a reinforcing rim 15 is attached to the opening edge of the manhole tube 1. Next, rim 1
A rubber seal ring 16 is fitted to the inner peripheral edge of 5,
Place the lid 17 over the seal ring 16. Next, the periphery of the manhole tube 1 is backfilled with dry sand 18 up to the vicinity of the opening edge, and finally, concrete 19 is poured up to the upper edge of the rim 15 to complete the construction.

FIG. 5 shows the cross-sectional shape of the rubber seal ring 16. The top portion is formed in a semicircular shape, and a circular annular hollow portion 16a is formed inside the top portion. Therefore, when the lid 17 is placed over the hollow portion 16a, the rubber seal ring 16 is easily deformed as shown by the chain line, improving the sealing performance with the lid 17.

Figures 6 and 7 show another embodiment of the present invention, in which a rectangular manhole tube 1A is formed into two flat pieces 2A, 2A, and the two side edges are bent at right angles. This is an example in which the piece is divided into four pieces 3A, 3A, a notch 2c is formed in the piece, and the contact plate 5A with the notch 5c is formed into a flat plate shape.

[Effects of the Invention] Since the present invention is configured as described above, it can be easily divided into pieces and processed, and can be stacked to form a small shape, making it easy to store and transport with ease. In addition, it can be easily connected and integrated using a joint trail and installed on site.

Further, by using the notch portion with a backing plate, the portion through which the pipe passes can be easily processed, and the installation work is easy.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is an enlarged cross-sectional view around the joint trail, Figure 3 is a perspective view of the plate, Figure 4 is a longitudinal cross-sectional view showing the installed state, Figure 5 is a cross-sectional front view of the rubber seal ring,
FIG. 6 is a perspective view showing another embodiment of the present invention;
The figure is a plan view of the plate. 1, 1A...manhole tube, 2, 3, 2A, 3
A...Peace, 4...Joint trail, 2c,
2c...Notch, 5,5A...Plate, 11...Oil supply pipe, 15...Brim, 16...Rubber seal ring, 16a...Empty part, 17...Lid.

Claims (1)

[Claims] 1. In the structure of a manhole pipe installed around a pipe connected to an underground tank, it is made up of multiple pieces, with the adjacent side edges of each piece bent 180 degrees, and the edges on both sides bent 180 degrees. They are connected by a bent joint rail, and the piece has a cutout from the bottom where the pipe passes through, and a backing plate is welded to the inside of the cutout. Characteristic structure of manhole tube.