JPH0431787Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to hand holes and side holes for installing road equipment through which cables are passed between cable boxes buried in sidewalks, etc. and equipment installed on the road. It is.

<Conventional technology> In recent years, so-called cable box systems, in which cable boxes are buried along sidewalks and cables such as power cables and communication cables are laid inside the cable boxes, have become popular in order to place emphasis on streetscapes. . This cable box system requires hand holes and side holes for installing road equipment through which cables are passed between the cable box buried in the sidewalk and the equipment installed on the ground. The length of the side hole must be suitable for each site, as the distance from the cable box to the roadside equipment installation varies depending on the site. Furthermore, the cable through hole on the side of the cable box does not necessarily form a straight line due to the relationship between the position of the cable through hole and the installation position of the equipment. For this reason, conventionally, hand holes and side holes having lengths and shapes suitable for the site have been constructed by directly pouring concrete at the site.

<Problem that the invention aims to solve> Every time roadside equipment was installed, concrete was poured on-site and hand holes and side holes were constructed with a length and shape that suited the site. It requires a lot of time and effort to assemble the concrete and curing the concrete, which is not very efficient.

<Means for solving the problem> The present invention was proposed in view of the above, and consists of a bottomed concrete cylindrical handhole with an upper opening on the upper surface and a side opening on the lower side. A small diameter opening having an outer diameter that can fit into the side opening of the hand hole is formed at one end, and a large diameter opening having an inner diameter equal to the outer diameter of the small diameter opening plus an adjustment allowance at the other end. A tunnel-like side hole is formed by connecting a plurality of short cylindrical concrete side blocks each having a diameter opening with the small diameter opening of the adjacent side block positioned within the large diameter opening. The small-diameter opening of the side block located at one end of the side hole is fitted into the side opening of the hand hole, thereby forming a hand hole and a side hole for installing on-road equipment.

<Function> The length can be adjusted to suit the site by increasing or decreasing the number of side blocks to be connected or by increasing or decreasing the amount of overlap between the small-diameter opening and the large-diameter opening of adjacent side blocks. Furthermore, by adjusting the lateral positions of the small-diameter opening and the large-diameter opening of adjacent side blocks, it can be bent and installed in a desired direction.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

Cable box system (CAB system)
As shown in Figure 1, a U-shaped cable box 1 is buried along the sidewalk, power cables 2, communication cables 3, etc. are laid inside the cable box 1, and other circuits installed on the ground are connected. To connect to equipment 4 such as a power supply or transformer, take out the cable from the cable through hole 5 made on the side of the cable box 1, pass the cable through the tunnel-shaped side hole 6 and into the hand hole 7, and connect it to the equipment on the ground. Connect with 4.

The hand hole 7 according to the present invention has a bottomed cylindrical shape made of concrete, and has a rectangular upper opening 8 on the stepped upper surface where the roadside equipment 4 is installed, and a slightly bulging side opening 8 on the lower side. A horizontally long rectangular side opening 9 is provided, and at the periphery of the top opening 8 there is a female threaded portion 1 for fixing the device 4 or screwing a hanging bolt 10.
1 is inserted.

On the other hand, the side hole 6 is formed by connecting a plurality of horizontally rectangular concrete short cylindrical side blocks 12 in a tunnel shape. Side block 12 is
A horizontally long rectangular small-diameter opening 13 having an outer diameter that can fit into the side opening 9 of the hand hole 7 is formed at one end, and the other end has a size equal to the outer diameter of the small-diameter opening 13 plus an adjustment allowance. a large diameter opening 14 having an inner diameter of
A sealing material 1 made of an elastic material such as urethane sponge is provided at the outer step where the base end of the large diameter opening 14 and the base end of the small diameter opening 13 connect.
5 is attached to the top surface and left and right side surfaces, and the top surface of the large diameter opening 14 has a female threaded portion 16 into which the hanging bolt 10 is screwed.
is inserted.

The large diameter opening 14 of the side block 12a disposed on the side of the cable box 1 has a connection frame 1.
Install 7. As shown in FIG. 6, the connecting frame 17 has a flange portion 19 formed at one end opening edge of a short cylinder portion 18 having a horizontally long rectangular shape, and a mounting hole 20 formed in the flange portion 19. As shown in FIG. Therefore, this connection frame 1
7 to the large-diameter opening 14 of the side block 12, the flange portion 19 is brought into contact with the side block 12 with the short cylindrical portion 18 facing outward, and the bolt is inserted into the mounting hole 20 to secure it. can. Note that the large diameter opening 14 of the side block 12a to which the connection frame 17 is attached has a female threaded portion 2 on the tip surface.
Insert 1.

To install the hand hole 7 and side hole 6 having the above-mentioned configuration, first screw the hanging bolt 10 into the female threaded part 16 of the side block 12a to which the connecting frame 17 is attached, and hang the wire on the hanging bolt 10. It is suspended by a crane or the like and lowered into a pre-dug trench, with the connection frame 17 facing the cable box 1 side. Then, as shown in Figure 7,
The short cylindrical portion 18 of the connection frame 17 is fitted into the cable through hole 5 of the cable box 1 and fixed with bolts 22. Note that a sealing material 15 made of urethane sponge or the like is packed between the side surface of the cable box 1 and the connection frame 17 to prevent the intrusion of earth and sand.

Next, move the second side block 12b to the first side block 12b.
To connect to the second side block 12a, suspend it in the groove in the same manner as described above, and as shown in FIG.
4b facing the small diameter opening 13a of the first side block 12a, and
By advancing b, the small diameter opening 13 of the first side block 12a is inserted into the large diameter opening 14b.
Fit a. When the two side blocks 12a and 12b are connected in this way, an adjustment margin d exists over four circumferences between the small diameter opening 13a of the first side block 12a and the second large diameter opening 14b. The second side block 12b can be moved and adjusted in the vertical and horizontal directions within the range of this adjustment allowance d. Furthermore, when the second side block 12b is moved back and forth, the overlapping length between the large diameter opening 14b of the side block 12b and the small diameter opening 13a of the first side block 12a changes, and both side blocks 12a, The length of the side hole 6 formed by 12b can be adjusted.

The third and subsequent side blocks 12c are installed one after another while adjusting their front, rear, left and right positions, similarly to the second side block 12b. By connecting and installing a plurality of side blocks 12a, 12b, 12c, . . . in this manner, it is possible to construct a tunnel-like side hole 6 having a length and shape (curvature) suitable for the site. Incidentally, by increasing or decreasing the number of side blocks 12, the total length of the side hole 6 can be largely adjusted.

Finally, the hand hole 7 is suspended in the groove, the small diameter opening 13d of the side block 12d is fitted into the side opening 9, and the groove is backfilled with earth and sand.

Even if the side holes 6 are covered with earth and sand, the end surfaces of the large-diameter openings 14 of each side block 12 are pressed against the sealing material 15, so that the earth and sand can be prevented from entering the side holes 6. can. Note that even if rainwater or the like penetrates the sealing material 15 and enters the side hole 6 to some extent, the side hole 6
Since there is a gap in the lower surface of the inside, water is drained underground from this gap and does not accumulate in the side hole 6.

<Effects of the invention> As explained above, according to the invention, there is no need to place concrete on site, so installation can be done more quickly and easily than before, significantly improving work efficiency. can.

In addition, the length can be adjusted as appropriate by increasing or decreasing the number of side blocks to be connected, or by increasing or decreasing the amount of overlap between the small diameter opening and the large diameter opening of adjacent side blocks. By adjusting the horizontal position of the small-diameter opening and large-diameter opening of the matching side block, it can be bent in the desired direction and installed, making it suitable for any site conditions, making it a versatile product. Rich in sex.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a perspective view showing the outline of the cable box system, Fig. 2 is a sectional view of the hand hole and side hole, and Fig. 3 A is a part of the hand hole. cutaway front view,
Figure 3B is a plan view of the hand hole, Figure 4A is a front view of the side block, Figure 4B is a side view of the side block shown in Figure 4A, and Figure 4C is Figure 4A.
FIG. 5A is a partially cutaway plan view of the side block shown in FIG.
5B is a side view of the side block shown in FIG. 5A, FIG. 5C is a partially cutaway plan view of the side block shown in FIG. 5A, FIG. 6A is a front view of the connecting frame,
Figure B is a side view of the connection frame, and Figure 7 is a sectional view showing the state of connection between the connection frame and the cable box. In the figure, 1 is a cable box, 4 is a device to be installed on the road, 5 is a cable through hole, 6 is a side hole, 7 is a hand hole, 8 is a top opening, 9 is a side opening, 12 is a side block, 13 14 is a small diameter opening, 15 is a sealing material, 17
is a connecting frame.

Claims (1)

[Scope of Claim for Utility Model Registration] A hand hole in the form of a cylinder with a bottom made of concrete is formed by opening an upper surface opening on the upper surface and a side opening at the lower side of the side surface, and fitting the hand hole into the side opening of the hand hole. A short cylindrical side made of concrete with a small diameter opening at one end having an outer diameter to obtain, and a large diameter opening at the other end having an inner diameter equal to the outer diameter of the small diameter opening plus an adjustment allowance. A tunnel-shaped side hole is formed by connecting a plurality of blocks with the small diameter opening of the adjacent side block located within the large diameter opening, and the small diameter opening of the side block located at one end of the side hole. A hand hole and a side hole for installing on-road equipment in a cable box system, characterized in that the hand hole and side hole are fitted into the side opening of the hand hole.