JP3971787B2 - Outdoor communication cable installation device to utility pole - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device for installing a house-side outdoor communication cable (lead wire) on a utility pole.
[0002]
[Prior art]
Conventionally, in order to install the outdoor communication cable on the house side to the utility pole, using a ladder or an aerial work platform, etc., the outdoor communication cable is fastened to the head of the utility pole with a retainer and connected to the overhead cable. It was done in.
[0003]
[Problems to be solved by the invention]
However, working at high places on the top of the utility pole is dangerous and causes work efficiency to decrease.
[0004]
The objective of this invention is providing the apparatus used for the installation method of the outdoor communication cable to a utility pole which can perform the operation | work which installs the outdoor communication cable of a house side to a utility pole safely and efficiently on the ground.
[0005]
[Means for Solving the Problems]
The apparatus for installing an outdoor communication cable on a utility pole of the present invention includes a lifting pipe 4 attached to the utility pole 1 along the vertical direction thereof, and a lifting cap 5 passed through the upper portion of the utility pole 1. The pull-up cap 5 includes a cylindrical cap body 7 that is passed through the utility pole 1 and upper and lower flanges 9 and 10 that project radially outward from the entire circumference of the cap body 7. Under the upper flange 9, a through hole 12 is formed in a part of the lower flange 10 with an upward and downward penetrating round shape. The lower surface of the flange 9 facing the through hole 12 is a slope that faces upward in the radial direction of the flange 9. The cross-sectional shape of the lower collar 10 is formed as an upward convex partial arc. The upper end of the pull-up tube 4 is connected to the lower end of the through hole 12 in a continuous manner. The outdoor communication cable 3 on the side of the house is connected to the aerial cable 2 in the terminal box 6 whose terminal is passed through the pull-up pipe 4 from the through-hole 12 and installed near the lower end of the pull-up pipe 4. It is characterized by being.
[0006]
The cross-sectional shape of the upper flange 9 is formed in a partially convex partial arc shape. A concave groove 11 is formed over the entire circumference of the base portion of the upper surface of the flange 10 with the cap body 7, and the concave groove 11 continues to the through hole 12 while drawing a curved surface. The pull-up cap 5 is formed of two-divided half caps 5a and 5b. The half rings 15a and 15b constituting the two-part type fastening ring 15 are integrally coupled to the upper and lower end surfaces of the half caps 5a and 5b, respectively. The pull-up cap 5 is fixed by fastening the half caps 5 a and 5 b with the electric pole 1 between them, and then winding the half rings 15 a and 15 b around the electric pole 1 with a bendable band 17.
[0007]
[Action]
According to the installation method using the apparatus having the above-described configuration, all of the wiring work, the temporary knotting work, and the connection work with the overhead cable 2 can be performed on the ground.
[0008]
According to the apparatus having the above-described configuration, in order to pass the outdoor communication cable 3 through the pull-up pipe 4, first, on the ground, the lead-through operation is performed by passing the flexible through-line 20 from the lower end of the pull-up pipe 4. The tip of 20 can be led out from the through hole 12 of the pull-up cap 5 and bent downward to reach the ground while self-reversing. Next, the tip of the communication line 20 that reaches the ground can be drawn down to the lower end of the pull-up pipe 4 by temporarily connecting the terminal of the outdoor communication cable 3 on the house side and then pulling back the communication line 20. . Thereafter, the terminal of the outdoor communication cable 3 can be disconnected from the temporary connection 20 and connected to the aerial cable 2 in the terminal box 6.
[0009]
The outdoor communication cable 3 can be drawn into the through-hole 12 from any direction 360 degrees on the flange 10 of the pull-up cap 5.
The outdoor communication cable 3 can be protected from scratches and disconnections by being drawn into the inside of the upwardly widened opening portion with a rounded through hole 12.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a front view showing a state after the outdoor communication cable is installed on the utility pole, and FIG. 2 is a front view showing a state in the middle of installing the outdoor communication cable on the utility pole. In FIG. 1, 1 is a utility pole, 2 is an aerial cable such as a copper wire cable or an optical cable spanned between the utility poles 1 and 3, 3 is an outdoor communication cable drawn into the house side, and 4 is a vertical connection to the utility pole 1 A pull-up pipe attached along 5 is a pull-up cap attached to the upper part of the utility pole 1, and 6 is a terminal box detachably installed at a location near the ground below the utility pole 1.
[0011]
As shown in FIGS. 3 to 5, the pull-up cap 5 is entirely made of aluminum, plastic, or the like, and integrally projects from the entire circumference of the cylindrical cap body 7 outward in the radial direction. It has upper and lower ridges 9 and 10. The cross-sectional shape of the lower flange 10 is formed as an upward convex partial arc, and a concave groove 11 having an arc-shaped cross section is formed over the entire circumference at the base of the upper surface of the flange 10 with the cap body 7. Yes. Further, an upwardly expanding through-hole 12 is formed at one location in the circumferential direction of the flange 10 so as to penetrate vertically. As shown in FIG. 5, the upper opening 12 a of the through hole 12 is formed with a curvature radius r of at least 30 mm, and the curvature radius of the outdoor communication cable 3 that bends at the top of the through hole 12 is ensured to be 30 mm or more. . The cross-sectional shape of the upper flange 9 is formed as a partially convex partial arc.
[0012]
The pull-up cap 5 can be attached to the upper portion of the utility pole 1 from the side thereof, and is formed by the half caps 5a and 5b so that the utility pole 1 can be attached even when the thickness of the utility pole 1 is different. In this case, as shown in FIG. 3, the dowel 13 is fitted on one mating surface so that the half caps 5a and 5b can be aligned with each other, and the hole 14 in which the dowel 13 is fitted on the other mating surface, respectively. Provide. Further, as shown in FIGS. 3 and 4, the half rings 15a and 15b constituting the split ring 15 are integrally coupled to the upper and lower end surfaces of the half caps 5a and 5b with screws 16, respectively. To do.
[0013]
In the pull-up cap 5 constructed as described above, the half caps 5a and 5b are fitted on the top of the utility pole 1 so that the utility pole 1 is sandwiched, and then the half rings 15a and 15b are bent with metal against the utility pole 1 as shown in FIG. It is fixed by tightening with a flexible band 17.
The upper end portion of the pull-up tube 4 made of a vinyl chloride resin tube or the like is connected to the lower portion of the through-hole 12 of the pull-up cap 5 so that the lower end of the pull-up tube 4 faces the terminal box 6. When attaching the pull-up cap 5 and the pull-up tube 4, the overhead cable 2 is inserted through the through-hole 12 of the pull-up cap 5 and passed through the pull-up tube 4, and then the connection terminal plate 19 in the terminal box 6. Connected to.
[0014]
In this way, when the lifting cap 5 and the lifting pipe 4 are attached to the utility pole 1 in advance at a high place, the utility pole 1 is used when the outdoor communication cable 3 is subsequently drawn into a house around the utility pole 1. All of the above work can be done on the ground without working at high places. For such ground work, a flexible wire 20 is prepared as shown in FIG. Then, on the ground, by performing a line work of pushing the through line 20 into the pull-up pipe 4 from the lower end thereof, the tip of the through-line 20 passes through the pull-up pipe 4 and the through hole 12 of the pull-up cap 5. And then it reaches the ground while self-reversing downward due to its bending action. The tip of the ground communication line 20 is temporarily connected to the terminal of the outdoor communication cable 3 on the house side. Next, after the connection line 20 is pulled back until the terminal of the outdoor communication cable 3 passes through the through hole 12 of the pull-up cap 5 and comes out to the lower end of the pull-up pipe 4, the temporary connection between the terminal of the outdoor communication cable 3 and the connection line 20 is performed. Solve the knot. Finally, the terminal box 6 is removed, the terminal of the outdoor communication cable 3 is fastened with a retainer (not shown), connected to the overhead cable 2, and the terminal box 6 is attached to complete the operation.
[0015]
When the outdoor communication cable 3 is pulled in, each house is present in every direction around the utility pole 1. Even in such a case, the outdoor communication cable 3 can be drawn into the through hole 12 from any direction of 360 degrees on the flange 10 of the pull-up cap 5. The outdoor communication cable 3 is stably and well introduced into the through-hole 12 without drooping by squeezing in the concave groove 11 until it reaches the through-hole 12 on the trough 10. The outdoor communication cable 3 can be pulled in without being damaged or disconnected by being passed through the upwardly widened opening portion 12a with a rounded through hole 12. The house may be higher than the land of the telephone pole 1. In such a case, the outdoor communication cable 3 may come into contact with the upper flange 9. However, since the flange 9 is formed in a downward convex partial arc, it can be protected from scratches and disconnection.
[0016]
Two or more through holes 12 may be provided in the pull-up cap 5 . In this case, the pull-up tube 4 is connected to each through hole 12 in a continuous manner.
[0017]
【The invention's effect】
According to the present invention, the outdoor communication cable 3 on the house side can be safely and efficiently installed on the utility pole 1 by work on the ground.
[Brief description of the drawings]
FIG. 1 is a front view showing a state after an outdoor communication cable is installed on a utility pole.
FIG. 2 is a front view showing a state in which an outdoor communication cable is installed on a utility pole.
FIG. 3 is a bottom view of the pull-up cap.
4 is an enlarged sectional view taken along line AA in FIG. 3. FIG.
5 is an enlarged sectional view taken along line BB in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Telephone pole 2 Overhead cable 3 Outdoor communication cable 4 Pull-up pipe 5 Pull-up cap 6 Terminal box 7 Cap body 10 鍔 11 Concave groove 12 Through hole 20 Wire

Claims (3)

A lifting pipe (4) attached to the utility pole (1) along the vertical direction thereof, and a lifting cap (5) passed through the upper part of the utility pole (1);
The pull-up cap (5) includes a cylindrical cap body (7) passed through the utility pole (1), and upper and lower hooks (9, 10) projecting radially outward from the entire circumference of the cap body (7). ) And
Below the upper ridge (9), a part of the lower ridge (10) is formed with a through-hole (12) with a vertically penetrating and upwardly extending round shape,
The lower surface of the flange (9) facing the through hole (12) is a slope that faces upward radially outward of the flange (9).
The cross-sectional shape of the lower ridge (10) is formed in an upward convex partial arc,
The upper end of the pull-up pipe (4) is connected to the lower end of the through hole (12) in a continuous manner,
The outdoor communication cable (3) on the house side has a terminal box (6) whose terminal is passed through the pull-up pipe (4) through the through-hole (12) and installed near the lower end of the pull-up pipe (4). A device for installing an outdoor communication cable on a utility pole, characterized in that it is connected to the aerial cable (2) . The cross-sectional shape of the upper ridge (9) is formed in a downward convex partial arc shape,
A concave groove (11) is formed over the entire circumference of the base portion of the upper surface of the flange (10) with the cap body (7), and this concave groove (11) is curved and continues to the through hole (12). The installation device of the outdoor communication cable to the utility pole of Claim 1 . The pull-up cap (5) is formed of a two-divided half cap (5a, 5b),
The half rings (15a and 15b) constituting the split ring (15) are integrally coupled to the upper and lower end surfaces of the half caps (5a and 5b), respectively.
After pulling the cap (5), the half cap (5a, 5b) is put so that the utility pole (1) is sandwiched, and then the half ring (15a, 15b) is wound around the utility pole (1) with a flexible band (17) The installation device of the outdoor communication cable to the utility pole of Claim 1 or 2 fixed by fastening .

Images