JPH058748Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a cable protection structure for a control unit of an electrical device installed on a utility pole.

[Prior Art] Generally, utility poles are provided with detectors such as switches for opening and closing electric lines or current transformers for detecting the voltage or current of electric lines. These switches and detectors are connected via transmission lines to a control unit or indicator installed in the middle of the utility pole, and the control unit can command the on/off operation of the switch, and the switch can indicate the on/off status. A signal for confirming this is input to the control unit, and an electric signal detected from the detector is input to the display.

In recent years, insulated optical fiber cables have been used as signal cables for transmitting signals as described above in order to prevent the effects of lightning surge currents and the like.

[Problems to be solved by the invention] However, the lead wires and transmission lines such as optical fiber cables led out from the switch or detector are bundled to an arbitrary diameter and fixed to utility poles or electrical equipment with vinyl tape or the like. Since the transmission line is only exposed on the side of the control unit or display, the transmission line is exposed to the side surface of the control unit or display. There was a problem in that workers could damage the coating of the transmission line, sometimes causing it to break, resulting in malfunction or inoperability of the opening/closing operation of the switch and the display operation of the display.

Furthermore, since the transmission lines run through exposed sides of the control unit and the electrical equipment, there is also a problem in terms of aesthetics of the pillar installation. In particular, when fiber optic cables are used, due to the nature of the material, it is impossible to bend the cables below a certain curvature, so long fiber optic cables may be located in a loose state near the control unit, causing damage or disconnection. However, this was a serious problem for beautifying the pillars.

Furthermore, when the detector and the display are connected by an optical fiber cable, if you want to disconnect one end of the optical fiber cable from the display and connect the optical fiber cable to another electrical device,
It is necessary to make the optical fiber cable extendable with sufficient margin in advance, but in this case,
Simply winding the cable into a loop and holding it on the surface of the utility pole with vinyl tape, string, or the like poses a problem in that the optical fiber cable is more likely to be damaged or disconnected.

The purpose of this invention is to ensure that transmission lines such as optical fiber cables connected to electrical equipment such as displays or control units are not damaged or disconnected during maintenance and inspection, or even due to wind and rain. It is an object of the present invention to provide a cable protection structure for electrical equipment that can be mounted on a pole and that can improve the beauty of the pole installation.

[Means for Solving the Problems] In order to achieve the above object, this invention provides a control unit that controls electrical equipment such as electric line switches or voltage and current detectors installed on utility poles. A transmission line holder is fixed to the inner surface of a protective case that is attached to the side so that it can be opened and closed, and a transmission line such as an optical fiber cable or a lead wire is wrapped around and held in the transmission line holder. .

[Function] As mentioned above, in this invention, the transmission line is held in the transmission line holder on the inner side of the protective case attached to the side of the control unit, so there is no possibility that the transmission line will be damaged or disconnected by the operator during maintenance inspection. , prevents shaking and damage and deterioration caused by wind and rain, thereby controlling malfunctions and malfunctions of electrical equipment, and
The beautification of pillars will be improved.

[Example] An example embodying this invention will be described below with reference to FIGS. 1 to 3.

As shown in FIG.
is supported horizontally, and high voltage wires 3a, 3b, 3c are supported on the cross arm 2 via support insulators (not shown). Current detectors 4a, 4 are connected to these high voltage lines.
b, 4c are attached, and each detector is connected to a control unit 9, which will be described later, by optical fiber cables 5a, 5b, 5c.

Further, the optical fiber cables 5a to 5c are connected to a protection tube 7 supported by a tightening band 6 on the utility pole.
It is guided downward through the inside. A arm 8 is similarly supported at the middle portion of the utility pole 1, and a control unit 9 is attached to the arm 8. As shown in FIGS. 1 and 2, this control unit 9 includes a main body case 10, a protective case 12 connected to the side surface of the case 10 via a hinge 11 so as to be openable and closable, and an inner part of the protective case 12. A winding drum 13 is provided as a transmission line holder for the optical fiber cable fixed to the side surface, as shown in FIG.
The remaining lengths of the optical fiber cables 5a to 5c are wound around grooves 13a formed on the outer periphery of the winding drum 13.

A low voltage wire 14 is supported on the armrest 8, a lead wire 15 is connected to the low voltage wire 14, and the lead wire enters the protective case 12 and is wound around the outer periphery of the winding drum 13. At the rear, it is connected to the lower surface of the main body case 10. Note that the terminal portions of the optical fiber cables 5a to 5c and the lead wires 15 are
Connecting terminals 16 to 19 are respectively attached to the bottom surface of the main body case 10 to be removably connected.

As shown in FIGS. 1 and 2, the optical fiber cables 5a to 5c and the lead wires 1 are attached to the upper and lower frame plates 12a and 12b of the protective case 12.
Notches 12c and 12d are formed for guiding the protective case 12 into the protective case 12 from above and leading it out from below the protective case 12.
Note that 20 is a handle fixed to the side surface of the protective case 12, and 21 is a lock lever for locking the main case 10 and the protective case 12.

A transmission line 22 is connected to the bottom surface of the main body case 10 by a connecting terminal 23 for transmitting voltage and current signals to a control circuit housed in the main body case 10 to a control device in a substation or business office. , are guided downward along the utility pole 1 by a protection tube 24.

Next, the operation of the table protection device configured as described above will be explained.

After the optical fiber cables 5a to 5c connected to the detectors 4a to 4c pass through the protective tube 7,
After being guided into the protective case 12 of the control unit 9 and wound one or more times in the groove 13a provided on the outer periphery of the winding drum 13 housed in the protective case, The optical fiber cables 5a to 5c and the lead wire 15 passing through the side surface of the main body case 10 are housed in the protective case 12 because they are led out and further connected to the lower surface of the main body case 10 through connection terminals 16 to 19. Therefore,
Damage or disconnection of the optical fiber cables 5a to 5c or lead wires 15 is prevented during installation of utility poles or maintenance and inspection work, and accidents such as malfunction or stoppage of the control circuit in the control unit 9 are prevented. Since a plurality of optical fiber cables and lead wires are not exposed on the side surface of the case 10, the appearance of the pillar installation can be improved.

Further, the optical fiber cable connection terminals 16 to 1
8 from the outlet on the side of the main body case 10, and open the protective case 12 as shown in FIG.
By unwinding the optical fiber cable from the outer periphery of the winding drum 13, the extra length can be pulled out and extended, and by further pulling down the connection terminals 16 to 18 and connecting it to another electrical device, The current signals of the current detectors 4a to 4c can also be easily used for other purposes.

Note that the present invention can also be embodied as follows.

(1) As shown in FIG. 5, an optical fiber cable 5d connected to a switch 31 attached to a utility pole 1,
5e to the control unit 9 side.

(2) As shown in Figs. 6 and 7, a plurality of ring-shaped transmission line holders 25 for holding the optical fiber cables 5a to 5c and the lead wires 15 are supported on the inner surface of the protective case 12.

[Effects of the invention] As detailed above, in the present invention, the extra length of a transmission line such as an optical fiber cable is held by a transmission line holder inside a protective case, so there is no damage or disconnection to the transmission line during pole mounting work. Furthermore, it is possible to prevent damage and deterioration due to wind and rain, and to contribute to the beautification of the pillar installation, as well as to easily remove and retain the extra length as necessary for other purposes. There are effects that can be used.

[Brief description of the drawings]

Figures 1 to 4 show an embodiment of the present invention; Figure 1 is a perspective view with the protective case opened, Figure 2 is a perspective view with the protective case closed, and Figure 3 is a perspective view showing the case mounted on the pillar. A front view showing the state, Figure 4 is a sectional view of the main parts,
FIG. 5 is a front view showing another example of the present invention, FIG. 6 is a perspective view of a main part similarly showing another example, and FIG. 7 is an enlarged sectional view of the transmission line holder shown in FIG. 6. 1...Electric pole, 3a~3c...High voltage line, 4a~4
c... Current detector, 5a-5c... Optical fiber cable, 7... Protection tube, 9... Control unit, 1
0... Main body case, 11... Hinge, 12... Protective case, 13... Winding drum as a transmission line holder, 15... Lead wire, 21... Lock lever.

Claims (1)

[Scope of utility model registration request] A transmission line holder is fixed to the inner surface of a protective case that is resealably attached to the side of a control unit that controls electrical equipment such as electric line switches or voltage and current detectors installed on utility poles. A cable protection structure for electrical equipment, characterized in that a transmission line such as an optical fiber cable or a lead wire is wound and held around the transmission line holder.