JP2862826B2 - Concrete underground wiring groove - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete underground wiring groove having a plurality of wiring holes through which electric cables and optical cables are inserted.

[0002]

2. Description of the Related Art In recent years, underground wiring of electric wire cables and optical cables has been improved by using a concrete underground wiring groove buried underground.

The above-mentioned concrete underground wiring groove is composed of a concrete wiring block having a plurality of short pillar-shaped wiring holes penetrating therethrough. Communication is performed, a wiring cable such as the above-mentioned electric cable is inserted into the communication wiring hole, and wiring is performed to a user through a concrete wiring box interposed at a key point.

[0004]

However, in the above-mentioned concrete underground wiring groove, when the wiring cable is inserted into the wiring hole, it frequently sticks to make it difficult to insert the cable, or the cable is forced to be reinserted, and the cable is reinserted. There was a problem that the drawing work was troublesome.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and a low friction sheet is attached to the inner peripheral surface of each wiring hole penetrating through the concrete wiring block. In addition, the cable can be inserted smoothly and quickly.

In addition, the inner peripheral concrete surface of the wiring hole is provided with a moisture-proof and anti-bacterial effect.

The above-mentioned concrete low-friction sheet is formed by forming the concrete wiring block as a half-section block bisecting the diameter of the wiring hole and affixing a low-friction sheet to a half-section inner circumferential concrete surface of each half-hole. Are closed so that the low friction sheet can be easily affixed annularly in the wiring hole.

In addition, the above low friction sheet is continuously adhered to the half inner circumferential concrete surface of the half cut wiring hole and the divided concrete surface (overlapping surface), and both low friction sheets are laminated on the inner circumferential concrete of the wiring hole by stacking half cut blocks. The low friction sheets are arranged so as to overlap with each other on the divided concrete surfaces, and the joints in the wiring holes of the low friction sheets are soundly covered with the sheets.

Further, an anchor structure such as a raised layer or a non-woven fabric layer which bites on the inner surface of the concrete surface of the wiring hole is formed on the surface of the low friction sheet to which the low friction sheet is adhered, thereby effectively preventing peeling when the cable is inserted. .

Further, a plurality of ribs extending from one end to the other end of the wiring hole are juxtaposed on the surface of the low friction sheet extending from one end to the other end of the wiring hole at intervals in the circumferential direction to reduce the cable contact area and reduce the friction. Increase.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIG.
This will be described in detail with reference to FIGS.

Numeral 1 is a short-pillar-shaped concrete wiring block having a quadrangular column shape. The wiring block 1 has a plurality of wiring holes 2 penetrating from one end surface to the other end surface of the wiring block 1 and is shown in FIGS. As shown, they are arranged side by side in a double row, or in a single row.

As shown in FIG.
A large number of wiring boxes are buried in the ground such as roads while abutting each other to communicate with the wiring holes 2, and the wiring cables 3 are inserted into the communication wiring holes 2. ), The branch wiring to the user is performed.

The inner peripheral surface of the wiring hole 2 is a concrete ground surface and is a thin and long path. A long cable that must be flexible and thin must be inserted into the cable, and when the cable is inserted, the cable is jammed, resulting in excessive work and labor.

According to the present invention, when the low friction sheet 4 is stuck to the inner peripheral concrete surface of the wiring hole 2 and a large number of the low friction sheets 4 are buried in a series as shown in FIG. The connection is made by the wiring path formed by the low friction sheet 4.

As described above, the wiring cable 3 can be inserted very smoothly and quickly into the wiring holes 2..., And is a simple and effective means for improving the problems in the concrete wiring block 1. is there.

The concrete wiring block 1 is shown in FIG.
As shown in FIG. 3, the wiring hole 2 is formed by stacking half blocks 1a which are divided in the axial direction from the position where the diameter of the wiring hole 2 is divided into upper and lower parts.

Therefore, each half block 1a has a semicircular half-shaped wiring hole 2a, and a low friction sheet 4a is attached to each of the inner peripheral concrete surfaces of the half-shaped wiring hole 2a.
The low friction sheet 4a is closed by the polymerization of the half-cut blocks 1a, and is arranged in an annular shape.

As shown in FIG. 9, the half block 1a uses a molding die 5 in which molding portions 2a 'having a semi-spherical cross section are juxtaposed.
It can be manufactured by installing a low friction sheet 4a so as to cover the surface of the wiring hole forming portion 2a ', then driving in concrete, curing and releasing the mold.

In the case of a wiring block 1 in which a plurality of wiring holes 2 are arranged side by side in double rows, the uppermost and lowermost half-cut blocks 1a have the half-cut wiring holes 2a only on one side. However, since the middle half block 1a has the half wiring holes 2a on both opposing surfaces,
In order to form this, as shown in FIG. 10, a pair of dies 5 having a wiring hole forming portion 2a 'having the same hemispherical cross section as shown in FIG.
Are placed facing each other, a low-friction sheet 4a is placed so as to cover the surface of the molding portion 2a 'of each mold 5, and then concrete is poured between the two molds 5 to be cured and then released.

In any case, the low-friction sheet 4a is firmly bonded to the wiring block side by the adhesiveness of concrete and is released from the mold.

The halved blocks 1a can be superimposed on each other, and the wiring blocks can be manufactured by bonding or bolting, and the circular low-friction sheet 4a can be used to form a circular wiring hole 2 on the inner peripheral concrete surface in an annular shape. The routing state can be easily formed.

In order to strengthen the connection between the low friction sheet 4 and the inner concrete surface of the wiring hole 2, the surface of the low friction sheet 4a to which the low friction sheet 4a is attached is an anchor having a brushed layer or a nonwoven fabric layer 6, as shown in FIG. 7A. Structure. Alternatively, as shown in FIG. 7B, the low-friction sheet is formed from a synthetic resin sheet in which a large number of projections 8 are integrally formed on the surface on the sticking side of the low-friction sheet 4a, thereby forming the anchor structure. The protrusion 8 has a locking portion 9 at its tip to enhance the coupling effect with concrete.

The low friction sheet 4a firmly bites the surface layer of the half inner circumferential concrete surface of the half wiring hole 2a with the raised layer or the nonwoven fabric layer 6.

As another example, as shown in FIGS. 5 and 6, a rib 7 extending from one end to the other end of the wiring hole 2 is formed on the surface of the low friction sheet 4 in contact with the wiring cable 3. Plural units are arranged at intervals in the direction.

FIG. 5 shows an example in which the ribs 7 are arranged at a relatively high density. For example, the ribs 7 having a triangular cross section are formed in a circular saw blade shape or a gear shape in the circumferential direction, and the ridge lines of the triangular ribs 7 are connected to the wiring cable. 3 is inserted as a sliding surface.
The ribs 7 are juxtaposed at relatively coarse intervals. For example, the surface of each rib 7 is formed into a flat surface or an arc shape concentric with the wiring hole 2, and the wiring cable 3 is guided as a sliding surface on this surface. . Each of the ribs 7 reduces the contact area between the low friction sheet 4 and the distribution cable 3 to reduce friction.

Next, another example of the structure for attaching the low friction sheet 4 will be described with reference to FIG.

As described above, the concrete wiring block 1 is divided at a position where the diameter of the wiring hole 2 is bisected, and is formed by each divided half block 1a. The half wiring hole 2a of each half block 1a is formed. Adhere continuously from the concrete surface to the split concrete surface.

That is, one low-friction sheet 4a is continuously adhered to each of the above surfaces, and the half-cut block 2a is overlapped to close the half-cut wiring hole 2a and the low-friction sheet 4a to form a circular wiring hole 2. At the same time, the inner peripheral concrete surface of the wiring hole 2 is annularly distributed by the low friction sheet 4.

At the same time, the wing-shaped pieces projecting from the portion of the low friction sheet 4a attached to the wiring holes 2a on the overlapping surface of the cut block 1a by an arbitrary size are overlapped with each other.

As shown in FIG. 2 and the like, when the low friction sheet 4a is applied only to the inner peripheral concrete surface of the half-cut wiring hole 2a, a gap is formed at the joint, and the concrete surface is exposed or the cable is inserted. At times, it is supposed to induce the curl from the edge.
, The joint in the wiring hole 2 is covered with the sheet 4a soundly and substantially seamlessly, and the resistance factor when the wiring cable 3 is inserted is removed.

As shown in FIG. 11, the half block 1a is a mold 5 in which a half wiring hole forming portion 2a 'having a hemispherical cross section is juxtaposed.
Is used, a low friction sheet 4a is provided so as to cover the whole of the forming part 2a ', and then the concrete is poured to form.

Also in the above embodiment, as shown in FIG.
The rib 7 as shown in FIGS. 5 and 6 can be formed on the cable contact side surface.

The low friction sheet 4a is a half-cut block 1a.
Although the case where it is attached over the entire width of the overlapped surface is shown in the drawing, this is attached from the half-cut wiring hole 2a to a part of the overlapped surface so that the joint can be covered soundly.

The low-friction sheet is formed of a synthetic resin sheet or a metal sheet expected to have a shielding effect of a cable or a paper sheet having a smooth inner surface, a synthetic resin pipe, a porcelain pipe, etc., and has a laminated structure. Do not hinder. As a suitable example, a synthetic resin sheet represented by a polypropylene sheet is used. This polypropylene sheet has a smooth surface and relatively good compatibility with concrete, and is effective as a slip sheet covering the inner peripheral concrete surface of the wiring hole for inserting a cable. It is also effective as a moisture proof and rat proof (antibacterial) measure in the concrete wiring groove.

[0036]

According to the present invention, the work of inserting a wiring cable into the above-mentioned wiring hole can be performed in an underground wiring groove in which a plurality of concrete wiring blocks having a plurality of wiring holes are joined to form a communication wiring hole. The structure for attaching the low-friction sheet enables smooth and quick operation, and the above-mentioned problem of the underground wiring groove made of concrete can be appropriately solved by simple means.

Further, by adhering a low friction sheet to the inner peripheral concrete surface of the wiring hole, moisture from the inside of the concrete is shut off, an antibacterial action against mold and the like can be expected, and the wiring cable is maintained healthy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a concrete underground wiring groove.

FIG. 2 is a cross-sectional view of the concrete underground wiring groove.

FIG. 3 is a longitudinal sectional view of the concrete underground wiring groove.

FIG. 4 is a cross-sectional view showing another example of a structure for attaching a low friction sheet in the wiring groove.

FIG. 5 is a cross-sectional view illustrating the structure of the cable contact side surface of the wiring groove.

FIG. 6 is a cross-sectional view showing the other example.

FIG. 7 is an enlarged cross-sectional view of a main part illustrating the structure of the surface of the wiring groove on the sticking side with the concrete surface.

FIG. 8 is a sectional view showing a state in which the wiring groove is buried underground.

FIG. 9 is a cross-sectional view showing an example of concrete molding of a half-cut block forming the wiring groove.

FIG. 10 is a cross-sectional view showing another example.

FIG. 11 is a transverse sectional view showing an example of concrete molding of the half-cut block in FIG.

DESCRIPTION OF SYMBOLS 1 Concrete wiring block 1a Half cut block 2 Wiring hole 2a Half cut wiring hole 2a 'Wiring hole forming part 3 Wiring cable 4, 4a Low friction sheet 5 Mold 6 Brushed layer or nonwoven fabric layer 7 Rib 8 Projection 9 Stop

Claims (5)

(57) [Claims] In a concrete underground wiring groove in which a plurality of wiring holes penetrating from one end surface to the other end surface in a short pillar-shaped concrete wiring block, wiring is carried out on an inner peripheral concrete surface of the wiring hole. Underground wiring groove made of concrete, characterized by attaching a low-friction sheet that imparts slipperiness when cables are inserted. 2. The concrete wiring block is formed of half-cut blocks divided at a position where the diameter of the wiring hole is bisected in the axial direction, and the low-friction is applied to a half inner circumferential concrete surface of each half-cut wiring hole of each half block. 2. The concrete underground wiring groove according to claim 1, wherein each of the sheets is attached. 3. The concrete wiring block is formed of a half block divided at a position where the diameter of the wiring hole is bisected in the axial direction, and the low friction sheet is connected to a half inner circumferential concrete of the half wiring hole of each half block. 2. A concrete underground wiring groove according to claim 1, wherein the groove is continuously attached from the surface to the divided concrete surface (overlapping surface of the half-cut block). 4. The concrete ground according to claim 1, wherein said attaching surface of said low friction sheet forms an anchor structure which bites into a surface layer of an inner peripheral concrete surface of said wiring hole. Middle wiring groove. 5. A plurality of ribs extending from one end to the other end of the wiring hole are arranged on the surface of the cable contacting side of the low friction sheet at intervals in the circumferential direction.
2. The concrete underground wiring groove according to 2, 3, or 4.