JPH0447848Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a retractable lighting tower placed in golf courses, gardens, and other outdoor areas.

(Prior art) Lighting towers placed at golf courses or gardens, etc., need to be stored compactly so as not to spoil the surrounding scenery when not in use. A type lighting tower is used.

In the conventional telescopic lighting tower, as shown in Fig. 3, the distal support columns 2 and 3 are sequentially inserted into the proximal support column 1 so as to be telescopic and retractable, and the proximal support column 1 is attached to the base 4. It is composed of a telescopic column 5 that stands upright in a substantially vertical state, and an illumination light 7 that is attached to the tip of the column 3 on the most distal side of the telescopic column 5 via an illumination light fixture 6. An appropriate telescopic drive device, such as a hydraulic cylinder (not shown), is interposed between each of the telescopic pillars 5. The telescoping lighting tower constructed in this manner is designed to elongate the telescoping support 5 at dusk or at night when illumination is required, and provide illumination with the lighting lamp 7 placed at the tip of the telescoping support 5, and during the daytime when no illumination is required. The telescopic column 5 is reduced in size for compact storage.

Furthermore, power is transmitted to the illuminating lamp 7 attached to the tip of the most distal end of the extensible strut 5 by connecting one end to the illuminating lamp 7, as shown in, for example, Japanese Patent Application Laid-Open No. 137370/1983. A simple power transmission device comprising a power transmission cable and a storage tube that is attached to the side surface of the proximal support column 1 and stores the power transmission cable in a manner that allows the power transmission cable to be extended out regardless of the expansion and contraction movement of the telescopic support column 5. I was getting used to it.

(Problems with the prior art) However, the telescoping lighting tower that uses such a power transmission device to transmit power to the lighting lights 7 has a height above the ground of about 13 m when the telescoping column 5 is fully extended. Moreover, since the power transmission cable connected to the lighting lamp 7 is not supported by a support, the power transmission cable swings when used in strong winds and hits the telescopic column 5, causing the power transmission cable to be damaged. There was a problem that the cable was easily damaged, causing wire breakage and electrical leakage.

The telescoping lighting tower of the present invention provides a new telescoping lighting tower that can always guide and support the power transmission cable that transmits power to the lighting lights regardless of the expansion and contraction movement of the telescoping support, thereby solving the problems of the prior art described above. This is an attempt to resolve the issue.

(Means for Solving the Problems) The present invention is constructed as follows in order to solve the above problems. That is, the distal column is sequentially telescopically inserted into the proximal column to form a telescopic column, a lighting light is attached to the tip of the distal column, and the distal column is telescopically inserted between the base and the proximal column. In a telescoping lighting tower equipped with a tilting cylinder that tilts and drives the support between an upright state where the support is erected approximately vertically and a collapsed state where the support is collapsed approximately horizontally, A power transmission device for transmitting power is constructed by telescopically inserting a plurality of pipes whose tips are fixed to the distal end of each of the distal ends of the telescoping struts and extend in the proximal direction along the telescoping axis of the telescoping struts. a telescoping pipe, a cable guard that fits over the lower end of the telescoping pipe and is attached to one side of the proximal support; The cable is inserted into the telescoping pipe through the opening, pulled out from the proximal opening, turned around in an arc shape within the cable guard, and the other end is fixed to the tip of the proximal support column in an appropriate position. It is something that

(Function) In the telescoping lighting tower of the present invention having the above-described configuration, the power transmission cable for transmitting power to the lighting lamps has its tip fixed to the tip of each end-side pillar of the telescoping pillar. The telescoping pipe, which is made by extending a plurality of pipes extending toward the proximal end along the telescoping axis and telescopically inserting them into each other, always guides and supports the telescoping column regardless of the expansion and contraction movements of the telescoping strut. Therefore, even if a strong wind acts on the telescopic support while the telescopic support is fully extended, the power transmission cable is guided and supported by the extendable pipe, and the pipe restricts the swinging, so the surrounding structure This prevents damage caused by collision with other members.

(Example) Examples of the telescoping lighting tower of the present invention will be described below with reference to FIGS. 1 and 2. Reference numerals 1 to 7 shown in FIG. 1 are the same as those shown in FIG. 3 and explained in the prior art section, so their explanation will be omitted.
Reference numeral 10 denotes a bracket 8 which is a pin and is fixed by protruding from one side of the proximal end of the proximal end support 1.
A bracket 9 is pivotally connected to the base 4 so as to protrude from the base 4 so as to overlap with the bracket 8. Reference numeral 13 denotes a luffing drive device (hereinafter referred to as a tilting cylinder), and its head portion includes a bracket 11 and a pin fixed to the proximal end of the most proximal column 1 so as to protrude from the side surface opposite to the bracket 8. 14, and the tip of the rod is pivotally connected to a bracket 12, which is fixed to the base 4 by protruding from the bracket 11, by a pin 15. When the tilting cylinder 13 is at its maximum contraction,
As shown in FIG. 1, the tilting cylinder 13 is installed so as to stand up substantially vertically, and at this time, the proximal end support 1 (extendable support 5) also stands up substantially vertically. In other words, when the telescoping strut 5 is in an upright state approximately vertically, the tilting cylinder 13 is in the most contracted state. 13 is designed to be compact so that it does not get in the way as much as possible. As the tilting cylinder 13 extends, the distance between the pins 14 and 15 is extended, and the proximal end support 1 (extendable support 5) is rotated around the pin 10 to allow it to fall down. cylinder 1
At the maximum extension of step 3, the proximal end support 1 (extendable support 5)
It is made to lie down in a substantially horizontal state. By making the bracket 8 and the bracket 11 protrude laterally from the basemost support column 1, the distance (moment arm) from the pin 10, which is the rotation fulcrum, to the pin 14 is increased, and the force applied to the tilting cylinder 13 is increased. It is designed so that less is required. A remote control device is attached to each of the illumination lights 7, so that the illumination lights 7 can be freely slightly moved relative to the illumination light fixture 6, and the irradiation direction can be changed from the ground. Reference numeral 16 denotes a hydraulic and lighting control device including an electric hydraulic pressure generator provided on the base 4, which controls the extension and contraction of the telescoping column 5 and the elevation control of the lighting lamp 7. a control device that controls the irradiation direction;
and equipped with safety devices such as breakers. Further, the control device 16 has a built-in timer control device for automatically contracting the telescopic support 5 after a predetermined period of time has elapsed once the telescopic support 5 has been extended. This means that most golf courses, gardens, etc. are illuminated for two to three hours from dusk. There are also dozens of lighting towers, and they are spaced several hundred meters apart, and it would take a lot of time to scale down the telescopic columns 5, so this was automated. Of course, it is also possible to cancel this timer control and use it. Reference numeral 17 denotes a cable for transmitting electric power for driving the hydraulic generator and electric power for the lighting lamp 7. Reference numeral 18 denotes a pipe whose tip end is fixed to the tip end of the column 2 and is arranged parallel to the column 2. 19 has its distal end fixed to the distal end of the distalmost column 3, and
This is a pipe placed parallel to the The inner and outer diameters of the pipe 19 are determined so that the outer diameter of the pipe 19 can be loosely inserted into the inner side of the pipe 18, and the pipe 19
The pipe 19 can be freely inserted and removed. 20
supplies power to the illumination lamp 7 and
It is a cable for transmitting a signal for controlling the direction of irradiation of the lamp, and one end of the cable is connected to the illuminating lamp 7, and after being fixed to the tip of the most distal support column 3, it is installed inside the pipes 19, 18, and is connected to the illumination lamp 7. After being bent into an arc shape and fixed to the distal end of the proximal support column 1, the other end is introduced into the control device 16. This cable 20 becomes as shown in FIG. 1 when the telescopic strut 5 is in the extended state. Then, as the telescopic strut 5 contracts, the pipe 19 is inserted into the pipe 18, and as the pipe 18 descends downward, the arc-shaped bent portion of the cable 20 is let out downward and the telescopic strut 5, the arc-shaped bent portion is positioned at the base end of the most proximal support column 1. Reference numeral 21 denotes a cable guard, which includes a member 22 with a cross-sectional shape fixed to one side of the most proximal support column 1 and a plurality of lattices 23.
It is made up of. As shown in FIG. 2 from the A-A cross section in FIG. It is fastened. The arcuately bent portion of the cable 20 is inserted into this arc-shaped member, and guides the arcuately bent portion of the cable 20 that moves up and down as the telescoping column 5 expands and contracts. It is something to guard against. The opening of the cross-shaped member 22 is provided with grids 23 arranged at regular intervals so that the cable 20 does not fly out. This grid 23
In addition to the above-mentioned purpose, it can also be used as a ladder for simple maintenance of the illumination light 7 when the telescoping support 5 is at its lowest contraction (in addition, the pipes 18 and 19 are telescopic as claimed in the utility model registration claim). It consists of pipes 18 and 19, and cable guard 2.
1 and cable 20 constitute the power transmission device claimed in the utility model registration).

Note that the expansion and contraction method of the telescopic strut 5 in this embodiment is to first extend the strut 2 from the most proximal strut 1, and then extend the strut 2.
A sequential reduction method in which the most proximal support column 3 is extended, and when contracting, the most proximal support column 3 is reduced in the opposite order to the above, or the most proximal support column 1 is expanded by the same amount, and the most proximal support column 3 is expanded by the same amount at the same time. A simultaneous expansion/contraction method is used to expand or contract.

The telescoping lighting tower constructed in this way operates as follows. Now, a case where the lighting lamp 7 is to be replaced will be explained. The hydraulic control device of the control device 16 brings the telescopic column 5 into the most contracted state.
The hydraulic cylinder that extends and retracts the telescoping column 5 is hydraulically locked so that no hydraulic pressure is supplied to it. Next, hydraulic pressure is supplied to the tilting cylinder 13 by the hydraulic control device of the control device 16, and the tilting cylinder 13 is extended to cause the telescopic column 5 to fall down. After the telescopic column 5 is lowered to a height at which the illuminating lamp 7 can be replaced, the hydraulic pressure is locked so that the hydraulic pressure is not supplied to the tilting cylinder 13. Thereafter, the lighting lamp 7 can be safely replaced at a low working height. Conversely, in order to erect the telescopic column 5, the operation opposite to the above may be performed.

In the above embodiment, the purpose of lowering the telescopic column 5 was to replace the lighting lamp 7, but it is also effective for the following purposes. Grease is applied between each strut of the telescopic strut 5 in order to reduce the frictional resistance of the sliding surface, but when the telescopic strut 5 is in an approximately vertical state and in an extended state. Applying grease close to the side surfaces of the most advanced support 3 and support 2 requires the construction of an aerial work vehicle or scaffolding. However, with this method, the telescopic column 5
Since it is fully extended, the work must be done at a high position, which is dangerous. Therefore, in this case as well, it is possible to lower the working height by lowering the telescopic column 5. In this case, if the telescopic pillar 5 is extended while the telescopic pillar 5 is laid down, the force acting on the tilting cylinder 13 will be large, so the mounting part and the tilting cylinder 13 need to be strong. When doing so, the tip of the proximal-most support 1 of the telescopic support 5 may be supported from the ground by a support stand.

(Effects of the invention) Since the invention is constructed and operates as described above, even if strong winds act on the telescoping strut while the telescoping strut is fully extended, the power transmission cable can be used as a telescoping pipe. Guidance is supported,
Since the pipe restricts the swinging, it will not come into contact with surrounding components and cause damage, making it possible to provide a highly reliable telescoping lighting tower.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a telescoping lighting tower according to the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is an explanatory diagram of a conventional telescoping lighting tower. 4...Base, 5...Extendable support, 7...Lighting light,
13...Tilt cylinder (levitation drive device).

Claims (1)

[Scope of Claim for Utility Model Registration] The distal column is telescopically inserted into the proximal column in order to form a telescopic column, and an illumination light is attached to the distal end of the distal column, and the base and base In a telescoping lighting tower in which a tilting cylinder is attached between the end supports to drive the telescopic support to tilt between an upright state where the support is erected substantially vertically and a collapsed state where the support is collapsed substantially horizontally, A power transmission device for transmitting power to the attached illumination lamp is provided by a plurality of pipes whose tips are fixed to the distal end of each distal end side column of the telescopic column and extend in the proximal direction along the telescopic axis of the telescopic column. A telescoping pipe that is telescopically inserted into each other; a cable guard that fits over the lower end of the telescoping pipe and is attached to one side of the proximal support; After being inserted into the telescoping pipe through the opening on the distal end of the telescoping pipe and pulled out from the opening on the proximal end, the cable is reversed in an arc shape within the cable guard, and the other end is fixed at an appropriate position at the distal end of the proximal support. A retractable lighting lamp characterized by being configured with a cable.