JPH0736667B2 - Steel plate U-shaped trough and its installation method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a U-shaped groove type trough as a buried electric wire cable protector and its installation method.

[0002]

2. Description of the Related Art In a conventional trough, as shown in FIG. 3, a main body (a) made of concrete and having a substantially U-shaped cross section is fitted into a groove (c) formed in the ground surface (b), and the upper surface is ground surface (b). A cover (d) having substantially the same surface as the above is covered, and a high voltage cable (e), a low voltage cable (f), an internal and external communication cable and the like (g) are inserted inside.

[0003]

However, this concrete trough is heavy in weight, difficult to carry, and poor in workability in a narrow space.

[0004]

Therefore, according to the present invention, the trough body is made of a steel plate so as to reduce the weight and improve the workability of transportation.
The assembling work at the site is easy, and load receiving materials are provided on both sides of the trough body. When the opening of the trough body is closed by the lid body, the load receiving materials support both sides of the lid body.

That is, a first aspect of the present invention is a trough having a U-shaped cross section as an electric wire protector embedded in a groove drilled in the ground surface, wherein an outer longitudinal portion of a constant length made of corrugated steel plate is formed in the groove. Insert two plates facing each other at regular intervals, insert a trough body made of corrugated steel plate with a substantially U-shaped cross section between them, and fold both upper ends of the trough body outward. The tips of the bent edges formed by abutting against each other are fixed to the outer vertical plates, and the gaps between these outer vertical plates and the side plates below the bent edges of the trough body and the bottom plate and groove bottom of the trough body. A U-shaped trough made of steel plate in which concrete is filled in a gap between the trough and a load receiving member, and the opening of the trough body is closed by placing both sides of the lid on the bent edges on both sides of the trough body. .

According to a second aspect of the present invention, two outer vertical plates each having a certain length and made of corrugated steel plates are inserted into the ground from the ground surface while facing each other at regular intervals and the ground between them. By digging a groove on the ground surface, and inserting a trough body made of corrugated steel plate with a substantially U-shaped cross section between these outer vertical plates,
The ends of the bent edges formed by bending the upper ends of both sides of the trough body outward are brought into contact with and fixed to the outer vertical plates, and the outer circumferences below the bent edges of the outer vertical plates and the trough body. A U-shaped steel plate made by pouring concrete into the gap between and to solidify to form a load receiving material, and placing both sides of the lid on the bent edges on both sides of the trough body to close the opening of the trough body. It is a method of installing a groove type trough.

[0007]

The load receiving member made of concrete is filled between the trough body made of corrugated steel plate and the outer vertical plate, and the strength is extremely high. Further, the trough body made of corrugated steel plate and the outer vertical plate form a mold when the concrete is poured. Also, insert various cables into the trough body,
The lid is put over this. As a result, the load of the vehicle or the like passing over the trough is mainly received by the lid body and the load receiving member, so that no direct load is applied to the trough body.

[0008]

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

FIG. 1 is a cross-sectional view showing the structure of the invention of claim 1, and 15 and 15 are outer vertical plates of a constant length, which are corrugated steel plates in which corrugated uneven lines are formed at right angles to the longitudinal direction. The outer vertical plates 15 and 15 are buried in the soil so that they are opposed to each other at a constant distance from the ground surface 5.

Reference numeral 16 is a trough body having a constant length and having a U-shaped cross section, which is placed in a groove 17 for discharging soil between the outer vertical plates 15 and 15. The trough body 16 is made of corrugated steel plate, Corrugated ridges and grooves are formed at right angles to the longitudinal direction of the trough body 16. Further, bent edges 16a, 16a bent outward in the horizontal direction are provided at upper edges of both sides of the opening 18 of the trough body 16.

Reference numeral 19 denotes an outer peripheral concrete layer filled in a gap between the outer edges of the trough body 16 and the outer edges of the bent edges 16a, 16a and below the trough body 16, and 20 denotes the bent edges 16a, 16a of the trough body 16. It is a concrete lid body that is placed on both sides to close the opening 18 of the trough body 16. Reference numeral 21 is a high voltage cable that is inserted into the trough body 1, and 22 is a low voltage cable.

In this embodiment, the peripheral concrete layer 19
Serves as a load receiving material, and the outer peripheral concrete layer 19 of the trough body 16 mainly receives the vehicle load passing on the trough. Therefore, even if the trough body 16 is made of a steel plate, it can sufficiently withstand.

Moreover, since the trough body 16 is made of corrugated steel sheet and is integrated with the outer peripheral concrete layer 19, the trough body 16 has high strength and can sufficiently withstand the load of a heavy vehicle or the like. However, the trough body 16 may be a flat steel plate as long as it has a certain strength, and does not necessarily have to be a corrugated steel plate.

Next, FIG. 2 shows an installation method according to the invention of claim 2. As shown in FIG. 2 (A), first, the outer vertical plates 15, 15 are opposed to each other at a constant interval and the soil is applied from the ground surface 5. Buried inside. Next, as shown in (B), only the earth and sand between the outer vertical plates 15, 15 is discharged to form the groove 17. Then, as shown in (C), the trough body 16 is inserted into the groove 17 and the trough body 16 is inserted.
The tip ends of the bent edges 16a bent outward from the upper ends of both sides are fixed to the outer vertical plates 15. Further, as shown in (D), the trough body 1 below the outer vertical plate 15 and the bent edge 16a.
Between the outer circumference of 6 and concrete is poured from a gap or a hole provided appropriately to solidify it, an outer concrete layer 19 is provided, and the lid 20 is placed on each of the bent edges 16a on both sides in the groove 17, The opening 18 of the trough body 16 is closed.

In the case of digging the groove 17 from the ground surface 5 in the case of this embodiment, the two outer vertical plates 15 and 15 which are previously inserted in the soil at a distance form a curb, and the soil between them is dug. Since it is good, it does not excavate extra soil and does not excavate soil, so workability is extremely good.

In the above-mentioned embodiment, the two outer vertical plates 15 are inserted from the ground surface 5 into the ground. However, if the ground to be excavated is hard, a groove is first drilled in the ground surface 5 instead of this. Two outer vertical plates 15 may be inserted in the groove.

Before the step shown in FIG. 1C, a concrete layer is provided on the bottom of the groove 17, and then the trough body 16 is placed on the upper surface of the concrete layer, and the side plate of the trough body 16 and the outer vertical plate 15 are placed.
In some cases, concrete is filled in between. Although not shown in the drawings, drainage holes may be appropriately provided in these embodiments.

Although the lid 20 is made of concrete in the above embodiment, it is not limited to this material and may be any suitable material.

Further, in the above embodiment, a lock is provided between the lid body 20 and the trough body 16 so that the operator only needs the lid body 20 when repairing.
It is also possible to put the key inside through a hole drilled in the lid 20 from the outside so that the lock can be opened so that the lid 20 cannot be opened unnecessarily at all times.

[0020]

The present invention has the above-mentioned structure and has the following features.
Since the trough body is made of corrugated steel sheet in the invention of the above item 1, the trough body is lightweight and is extremely easy to carry and handle. Further, a load receiving material made of a concrete layer provided on both sides of the trough body mainly receives the load of a vehicle passing over the trough, so that the trough body is not directly subjected to the load. Therefore, even if the trough body or the outer vertical plate is a thin steel plate, the inside is filled with the concrete load receiving material, so that the trough can sufficiently withstand the above load.

Further, since the steel plate and the concrete are integrated as described above, the weight is large, and the steel plate does not float up due to vibration such as traffic of the vehicle. Moreover, it is possible to easily cope with a heavy load on a passing vehicle by adjusting the width of the bent edges at the upper edges of both sides of the trough body made of corrugated steel sheet.

According to the second aspect of the invention, when the upper end of the outer vertical plate near the ground surface becomes a curb and a groove is to be drilled on site, the outer vertical plate can be used as a guide for digging earth and sand more than necessary. You don't have to open a lot. The outer vertical plate and the trough main body form a mold into which concrete is poured during assembling at the site, and also serve as the constituent members as they are, so that the work is extremely easy to bury.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

2 (A), (B), (C) and (C) are sectional views showing an installation procedure in an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a conventional example.

Front page continued (72) Inventor Kanji Yamada 5-2-1 Ebara, Shinagawa-ku, Tokyo Inside Saneisha Co., Ltd. (72) Inventor Tetsuzo Hirose 5-46 Kogocho, Yokosuka City, Kanagawa Prefecture (72) Invention Person Yasuko Kobori 3-10-14 Aoba, Sagamihara City, Kanagawa Prefecture (72) Inventor Kenichi Tsunami 661-1 Higashibeppu, Kumagaya City, Saitama Prefecture (72) Katsuyoshi Hayakawa 2-19 Nishinarashino Town, Funabashi City, Chiba Prefecture

Claims (2)

[Claims] 1. A trough having a U-shaped cross section as an electric wire protector buried in a groove formed in the ground surface, wherein two outer vertical plates of a constant length made of corrugated steel plates are mutually fixed in the groove. The trough body made of corrugated steel plate with a substantially U-shaped cross section is inserted between them, and the tops of both sides of the trough body are bent outward so that the tips of the bent edges are formed. A load receiving member made of concrete is provided in the gap between each outer vertical plate and the outer vertical plates and the outer periphery of the trough body below the bent edge of the trough body. A U-shaped grooved trough made of steel plate, characterized in that both sides of the lid are placed on the curved edges to close the opening of the trough body. 2. Two outer vertical plates having a constant length and made of corrugated steel plates are inserted into the ground from the ground surface while facing each other at a constant interval, and the ground between them is dug to the ground surface. A trough body made of corrugated steel plate having a substantially U-shaped cross section is inserted between these outer vertical plates, and the upper ends of both sides of the trough body are bent outward to form the ends of the bent edges. Abutting and fixing to the outer vertical plates, concrete is poured into the gap between each of these outer vertical plates and the outer periphery below the bent edge of the trough body to solidify, and the load receiving material is formed by these, and the trough A method of installing a U-shaped trough made of steel plate, characterized in that both sides of the lid are placed on the bent edges on both sides of the body to close the opening of the trough body.