JPH0214259Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a trough used for underground and above-ground wiring of power lines, communication lines, etc.

(Prior art) Conventionally, concrete troughs and plastic troughs have been known as troughs for underground and above-ground wiring, but although the former has excellent strength, it is heavy and short, so it is difficult to install it underground. The latter requires a lot of labor to construct, and although it is easy to bury because it is lightweight and long, it has the problem of being inferior in strength. Therefore, when using it for so-called above-ground wiring where the trough is buried underground and the cover is exposed above the ground, such as in a campus, a concrete trough is used in areas where there is a lot of traffic such as people and motorcycles. In places where trough transportation vehicles such as troughs cannot get close to the installation location, it is desirable to use different troughs depending on the installation location, such as using plastic troughs. However, even if a concrete trough and a plastic trough have the same internal space, their wall thicknesses differ and their external shapes are significantly different, making it impossible to connect them as is. Therefore, conventionally, concrete troughs and plastic troughs have been used separately, and it has been difficult to use them separately as described above.

(Problems to be solved by the invention) The present invention solves the above-mentioned conventional problems and provides a trough that can be partially used as a concrete trough or a plastic trough depending on the installation location. It was completed with the purpose of

(Means for solving the problem) The present invention provides a concrete trough in which a concrete trough body is covered with a concrete trough cover, and the cross section of the internal space is approximately the same as that of the concrete trough, but the external shape is smaller. A plastic trough with a plastic trough cover attached to a plastic trough body is connected by a connecting trough with a connecting trough cover attached to the connecting trough body, and the connecting trough body is , one end thereof is formed into a connecting part having a recessed part in which the insertion protrusion protruding from the end face fits into the joint end face having the same shape as the end face part of the concrete trough main body, and the other end is formed into the connecting part having the same shape as the end face part of the concrete trough main body. The connecting part is formed into a step-like connecting part into which the insertion part formed at the end of the plastic trough body fits, and the connecting trough cover has one end in contact with the end face part of the concrete trough cover. A plastic trough cover having an eave part formed at a connecting part with a concrete trough cover having a joint end surface that comes into contact with the concrete trough cover, and the other end of which is engaged with a step part formed at an end of the plastic trough cover. It is characterized in that it is formed in the connection part of the.

(Example) Next, an example of the present invention will be described in detail based on the drawings.

In the first embodiment shown in FIGS. 1 and 2,
1 is a concrete trough body 2 with a U-shaped cross section and a concrete trough cover 3 that is covered with it.
4 is a plastic trough whose internal space is approximately the same in cross section as the concrete trough 1 but smaller in external shape, and the plastic trough 4 is a plastic trough with a U-shaped cross section. It consists of a main body 5 and a plastic cover 6 that is attached to the main body 5. Reference numeral 7 designates a connecting trough made of the same plastic material as the plastic trough 4, and the connecting trough 7 consists of a connecting trough body 8 and a connecting trough cover 9 covered therewith. One end of the connecting trough body 8 of the connecting trough 7 is an end face portion 2a of the concrete trough body 2.
The joint end surface 10a is formed with a flange having the same external shape, and the joint end surface 10a is provided with a recess 10b into which an insertion portion 2b protruding from the end surface 2a of the concrete trough body 2 can be fitted. The connecting part 10 is formed in a connecting part 10 with the concrete trough main body, and the other end is formed into a step-shaped connecting part 12 into which an insertion part 11 formed at one end of the plastic trough main body 5 can be fitted. It is something that Reference numeral 13 denotes a locking portion consisting of an engaging hole transparently provided in the connecting portion 12 of the connecting trough body 8 as required;
The locking portion 13 is fitted with a convex locking portion 14 provided on the insertion portion 11 of the plastic trough body 5 to prevent front and rear separation. In addition, a connecting trough cover 9 that is attached to the connecting trough body 8
is formed into a connecting part 15 having an end face part 15a hanging down like a leg plate, one end of which comes into contact with the end face part of the concrete trough cover 3 that is covered with the concrete trough body 2, and the other end is made of plastic. A connecting portion 16 with a plastic trough cover has an eaves portion 16a that engages with a step 6a provided at the end of the plastic trough cover 6 that is attached to the plastic trough body 5.

Next, the second embodiment shown in FIGS. 3 and 4 is as follows.
In the first embodiment, the connecting trough 7 is made of plastic, which is the same material as the plastic trough 4, but is made of resin mortar, and its wall thickness,
The cross-sectional shape is approximately the same as that of the concrete trough 1, and the connecting portion 10 of the connecting trough body 8 with the end of the concrete trough body 2 is the connecting end surface 1.
A concave portion 10b is provided directly in the connecting trough cover 9, and the structure of the connecting portion 15 that comes into contact with the end surface of the concrete trough cover 3 of the connecting trough cover 9 is substantially the same as in the first embodiment. The connecting part 12 with the plastic trough body 5 is also roughly the same as in the above embodiment, but the locking part 13 is not an engagement hole but a notch. It has a shape that simply fits into the convex locking portion 14 of the plastic trough body 5. In addition, the connecting trough cover 9
The connecting part 15 is made of concrete trough cover 3.
The connecting part 16 of the connecting trough cover 9 has an eave part 16 on its end face.
a so that it can engage with a step 6a provided at one end of the plastic cover 6.

(Function) In a device constructed in this way, the solid concrete trough 1, which has almost the same cross-sectional shape of the internal space but has a large outer diameter due to its thick wall, is placed at a location where a large load is applied due to its thin wall and insufficient strength. However, the plastic troughs 4, which are cheap and easy to handle, are buried in the ground so that they are not subject to large loads and are connected using connecting troughs 7, and cables such as power lines and communication lines are laid inside. However, one end of the connecting trough body 8 is fitted with an insertion part 2b protruding from the end face 2a of the concrete trough body 2 into a joint end face 10a having the same shape as the end face 2a of the concrete trough body 2. The connecting part 10 is formed with a recess 10b that can be fitted into the connecting part 10, and the connecting part 12 is shaped like a step into which an insertion part 11 formed at one end of the plastic trough main body 5 can fit at the other end. Since the concrete trough 1 and the plastic trough 4 have different sizes, one end of the connecting trough body 8 is tightly connected to the connecting part 11 with the end of the concrete trough body 2. Then, the other end of the connecting trough body 8 is tightly connected to the connecting part 11 of the plastic trough body 5 with the connecting part 12, and the concrete trough body 2 and the concrete trough body 2 having different external sizes are connected. The plastic trough body 5 can be accurately and easily connected and integrated with the connecting trough body 8. The connecting trough cover 9 that is attached to the connecting trough body 8 has one end formed into a connecting portion 15 that comes into contact with the end surface of the concrete trough cover 3 that covers the concrete trough body 2, and the other end. Since the connecting part 16 is formed with an eaves part 16a that engages with a step part 6a received at the end of the plastic trough cover 6 that is attached to the plastic trough body 5, the external size is different. Even though the concrete trough cover 3 and the plastic trough cover 6 are connected, rainwater does not enter the interior through the connection part, and the connecting trough cover 9 is connected to the concrete trough cover 3 and the plastic trough cover 6. It can be connected closely to the cover 6. As described above, according to the present invention, the concrete trough 1 and the plastic trough 4 can be easily connected, so that parts can be used freely depending on the installation location.

(Effects of the invention) As is clear from the above explanation, the invention has the following effects:
Since the concrete trough and the plastic trough, which have different external sizes, are tightly connected by the connecting trough, the characteristics of the concrete trough can be utilized to reduce the amount of traffic of people, motorcycles, etc. in the premises. Concrete troughs are installed in areas where there is a large amount of troughs, and plastic troughs are installed in areas where trough transport vehicles such as trucks cannot get close to the installation location, allowing for the installation of troughs that can be used appropriately depending on the installation location. . In addition,
Such a trough can be used not only when constructing a new trough, but also when adding to an existing trough, and has great practical value as it eliminates the problems of conventional troughs.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing the first embodiment of the present invention, Fig. 2 is a partially cutaway exploded perspective view thereof, and Fig. 3 is a partially cutaway side view showing the first embodiment of the present invention.
The figure is a partially cutaway side view showing a second embodiment of the present invention, and FIG. 4 is a partially cutaway exploded perspective view thereof. 2: Concrete trough body, 2a: End face part, 2b: Insertion part, 3: Concrete trough cover, 5: Plastic trough body, 6: Plastic trough cover, 6a: Step part, 8: Connection trough body , 9: Connection trough cover, 10:
Connection portion, 10a: Joint end surface, 10b: Recessed portion, 1
1: Insertion part, 12: Connection part, 15: Connection part,
15a: End surface portion, 16: Connection portion, 16a: Eaves portion.

Claims (1)

[Scope of utility model registration request] A concrete trough 1 is constructed by covering a concrete trough body 2 with a concrete trough cover 3, and a plastic trough body 5 is constructed of a plastic trough body 5, which has a cross section of an internal space that is approximately the same as that of the concrete trough 1, but has a smaller external shape. A plastic trough 4 covered with a cover 6 is connected to a connecting trough body 8 by a connecting trough 7 covered with a connecting trough cover 9, and the connecting trough body 8 has one end thereof. is a joint end surface 10a having the same shape as the end surface portion 2a of the concrete trough body 2.
The connecting part 10 is formed with a recess 10b into which the insertion protrusion 2b protruding from the end face part 2a is fitted, and the other end is formed at the end of the plastic trough body 5. The connecting trough cover 9 has a joining end surface 15a whose one end is brought into contact with the end surface of the concrete trough cover 9. For connection with a plastic trough cover, which has an eave part 16a formed in a connection part 15 with a concrete trough cover and whose other end is engaged with a step part 6a formed at the end of the plastic trough cover 6. A trough formed in the portion 16.