JPH0747943Y2 - Connecting device for trough body in concrete cable trough - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a connecting device for a trough body in a concrete cable trough.

[0002]

2. Description of the Related Art Conventionally, cable troughs of this type have been installed and laid along the railroad cables for signals, communications, electric power, etc., to protect them from sunlight, the atmosphere, wind, rain, and rats.

As shown in FIG. 7, the structure of the trough main body 10 in the conventional concrete cable trough is such that one end face is in the lower half on both left and right inner side walls for fitting and the inner bottom face side is about half its thickness. U-shaped recess receiving groove 11 that is recessed to some extent
And a ridge 1 that fits the concave receiving groove 11 on the opposite end face.
2 is provided and engaged at the time of installation at the site.

[0004]

As described in the above-mentioned conventional section, when the connecting portion is provided by the same member, the concave groove and the ridge must have a certain width in terms of strength. , Was unable to make a thin concrete cable trough.

In recent years, due to lack of manpower, the work of transporting heavy goods has been particularly shunned. Also, due to the situation of the site where the concrete trough is installed, light weight has become socially required.

The present invention has been made based on such a request.

[0007]

In a trough body of a concrete cable trough provided with a trough body and a lid body, at least a pair of mounting holes on the left and right of both front and rear end surfaces of the trough body are connected to each other at an axis line corresponding to each other. The concrete is characterized in that the main body is connected by tapping a connecting pin into this mounting hole.
It is in the connection device of the trough body in the cable trough.

The mounting hole of the trough body may have a tapered conical shape with a tapered hole diameter, and a connecting pin may be driven and crimped.

The connecting pin may be formed in a double-headed conical shape with both ends tapered, and the central portion may be formed to have the thickest large diameter.

The connecting pin may be formed in a double-headed conical shape with both ends being tapered, and the central part may be formed in the shape of the thickest disk, and the connecting twill may be radially radiated from both sides thereof. is there.

For the material of the connecting pin, it is preferable to use a synthetic resin material such as engineering plastic having good strength and slipperiness.

[0012]

Since the present invention is constructed as described above,
In construction, the installation position where the trough body 2 is arranged in a row is secured, and the adjacent ones are sequentially shifted to connect the end faces. First, the connecting pin 5 is driven into the mounting hole 4 on the front side, and then The adjacent one is displaced, and the attachment hole 4 of the rear trough body 2 is aligned with the connecting pin 5 at the end of the displacement, and the displacement is fitted. Although not shown in the drawing, after tens to hundreds of meters have been installed in the field, a cable is laid, and the lid 3 is connected and closed at the upper end of the cable to complete the process.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. 1 is a concrete cable trough, and the cable trough 1 is provided from a trough body 2 and a lid 3 of the invention. The trough body 2 of the present invention has a trough shape as shown in the figure, and the front and rear end surfaces of the body 2, that is, the connecting corners 2 between the left and right side wall portions 2a and the bottom wall portion 2b.
A pair of mounting holes 4 and 4c are formed in the end faces of c and 2c so as to coincide with each other when they face each other and have corresponding axes, and the connecting pin 5 is driven into the mounting holes 4 to connect the trough body 2. is there.

Although the mounting holes 4 and 4 are provided in the connection corner portions 2c and 2c in the illustrated embodiment, the positions and the number thereof are not limited.

The connecting pins 5 are driven in half into the mounting holes 4 of the main body 2 to connect the adjacent main bodies 2 and 2.

The type and shape of the connecting pin 5 are arbitrary, but as an example, the details thereof will be described with reference to FIGS. 5 and 6, as shown in the side view of FIG. It has a conical shape, and the central portion is formed with a large diameter 6.

It should be noted that on the premise of the above-mentioned connecting pin 5, that is, even if both ends are formed in a tapered double-headed conical shape, and then the central portion is formed into the thickest disc-shaped portion 6a, both ends are formed. It is also possible to radially raise the bonding twill 7 to obtain the structure shown in FIG.

As a material for the connecting pin 5, a synthetic resin material such as engineering plastic having good strength and slipperiness is used.

The mounting hole 4 of the connecting pin 5 of the trough body 2 is
The connecting pin 5 is formed to have a slightly smaller diameter and is press-fitted by being driven. At the time of this driving, when the joining twill 7 is provided in a portion that cannot be absorbed by compression, it can be released to the valley between the joining twill 7 and the joining twill 7. The large diameter 6 at the center of the connecting pin 5 and the disk-shaped portion 6a seal the mouth end of the mounting hole 4 and waterproof it.

In this embodiment, the cover plate 3 is provided with the same overall length as the trough body 2, and both sides of the lower surface are formed to have a low thinness in conformity with the upper end surface of the body 2, and the front and rear end surfaces have the main body. The mounting holes 8, 8 of the same connecting pin 5 as 2 are opened with the axes corresponding to each other.

[0021]

[Effect] Since the present invention is as described above, mounting holes for connecting pins can be easily provided on the front and rear end faces of the main body when manufacturing the mold, and the connecting pins can be attached to the main body during construction. Insert the other half of the connecting pin easily by driving it into the mounting hole at one end and placing half of it protruding, then sliding the new body and pushing it into the mounting hole at the opposite end where it has not been driven. Since it can be press-fitted and fixed to an appropriate degree, there is no need to provide an engaging protrusion and an engaging groove on the main body as in the past, and therefore, the manufacturing mold is simple,
Further, the wall thickness of the side wall and the bottom wall can be reduced, and the total weight can be reduced by 30 to 50%.

Further, since only a small diameter pin is driven for connection, the connection work can be performed easily, and even if the wall thickness is made thin, the strength of the main body is not impaired, and the connection pin is strong. The main body is connected with various strength and crimping force.

[Brief description of drawings]

FIG. 1 is an end view of a concrete cable trough including a trough body of the present invention.

FIG. 2 is an end view of one end of the invented trough body.

FIG. 3 is a vertical sectional side view of a main part of the trough body.

FIG. 4 is a side view showing an embodiment of a connecting pin that connects the trough bodies.

FIG. 5 is a side view showing another embodiment of the connecting pin.

FIG. 6 is an explanatory diagram of the order of connecting and laying the trough bodies.

FIG. 7 is a vertical sectional side view of a main part of a conventional trough body.

[Explanation of symbols]

 1 Concrete / Cable Trough 2 Trough Main Body 2a Side Wall 2b Bottom Wall 2c Connection Corner 3 Lid 4 Mounting Hole 5 Connecting Pin 6 Large Diameter 6a Disk-shaped 7 Joining Tail 8 Mounting Hole

Claims (5)

[Scope of utility model registration request] 1. A concrete cable trough 1 provided with a trough body 2 and a lid body 3, at least a pair of mounting holes 4 on the left and right of both front and rear end surfaces of the trough body 2,
Connecting the trough main body in the concrete cable trough, characterized in that the trough main body 2 is connected to the mounting holes 4 and 4 by inserting the connecting pin 5 into the mounting holes 4 and 4. apparatus. 2. The connecting device for a trough body in a concrete cable trough according to claim 1, wherein the mounting holes 4 and 4 have a tapered conical shape with a tapered hole diameter, and the connecting pin 5 is driven and crimped. 3. The cable trough main body in the concrete cable trough according to claim 1 or 2, wherein the connecting pin 5 has a double-sided conical shape with tapered ends and a large diameter 6 at the central portion. Connecting device. 4. The connecting pin 5 is formed in a disk-shaped portion 6a having the thickest central portion and a double-headed conical shape with both ends tapered, and a connecting twill 7 is radially raised from both sides thereof. A connecting device for a trough body in the concrete cable trough according to claim 1 or 2. 5. The synthetic resin material having good strength and slippage, such as engineering plastic, is used as the material of the connecting pin 5, wherein the synthetic resin material has good strength and slipperiness.
Alternatively, the connection device for the trough body in the concrete cable trough according to claim 4.