JPH0632947Y2 - Lighting equipment for aerial work vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Use The present invention relates to a lighting device for an aerial work vehicle that effectively illuminates a work site using the aerial work vehicle.

(2) Conventional technology In aerial work vehicles used in electrical work, booms are electrically insulated in order to prevent electric shock accidents for workers on the workbench. When working at night with the electric cord, it is necessary to install a floodlight on the vehicle body to illuminate the workbench from the vehicle body, because hanging the electric cord from the vehicle body onto the workbench impairs the insulation performance of the boom. Or
A floodlight and a battery for this floodlight were loaded on the workbench to illuminate the work site.

(3) Problems to be solved by the invention Among the conventional lighting devices for aerial work vehicles, the one that irradiates the workbench with a light projector provided on the vehicle body is a shadow of the workbench or the like. There is a problem that effective lighting cannot be performed on the work site. In addition, lighting that uses a floodlight and a battery loaded on the workbench reduces the illumination time and reduces the loading capacity of the workbench. There was a problem.

(4) Means for Solving the Problems In order to solve the above problems, the present invention provides a work table at the tip of a boom pivotally mounted on a turntable mounted on the vehicle body so as to be rotatable. In an illuminating device for an aerial work vehicle equipped with the pole, which is erected vertically on a turntable and is capable of expanding and contracting upwards, a projector attached to the tip of this pole for radiating light toward the work table, and the work table. And a drive device that expands and contracts the pole according to the calculation result of the calculator so that the projector always illuminates the work site.

(5) Operation With the above configuration, when performing work at night using a work platform for aerial work, by operating the boom to move the workbench to the work position, the calculator raises the height of the workbench. Calculate,
The drive device operates according to the calculation result of the calculator to expand and contract the pole, and the projector mounted at the tip of the pole moves following the workbench so that the projector always illuminates the work site. .

(6) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, an aerial work vehicle is provided with outriggers (2) for supporting the vehicle body (1) on the left and right sides of the vehicle body (1), and a turnable turn is provided on the vehicle body (1). A table (3) was provided, and a base boom (4a), an intermediate boom (4b) and a tip boom (4c) made of an electrically insulating material were sequentially connected to the turntable (3) in a telescopic manner. The base end of the telescopic boom (4) is pivotally supported, and the telescopic boom (4) is telescopically moved by a telescopic device (not shown), and both ends are pivotally attached to the turntable (3) and the base boom (4a). The cylinder (5) is undulated by expansion and contraction, and the workbench (6) is held in equilibrium at the tip of the telescopic boom (4).

A telescopic pole (7) is vertically attached to the turntable (3), and the pole (7) is telescopically extended by a built-in telescopic device (not shown), and a workbench (6) is attached to the tip of the pole (7). ), The projector (8) is attached so as to irradiate the light. The base boom (4a) of the telescopic boom (4) is provided with a first telescopic length detector (9) for detecting the telescopic length of the telescopic boom (4), and the turntable (3) is attached to the telescopic boom (4). ) Is provided with an undulation angle detector (10) for detecting the undulation angle, and the pole (7) is provided with a second extension / contraction length detector (11) for detecting the extension / contraction length of the pole (7). The table (6) is equipped with a control device (12) for controlling the operations of the turntable (3), the telescopic boom (4), the floodlight (8) and the like.

FIG. 2 shows a control circuit for the pole (7), in which the first expansion / contraction length detector (9) and the undulation angle detector (10) are the arithmetic unit (1).
3), the computing unit (13) is connected to the telescopic boom (4).
The height and the undulation angle of the workbench (6) are calculated and output, and the calculator (13) and the second expansion / contraction length detector (11) are connected to the comparator (14) to 14) compares the height of the workbench (6) with the height of the pole (7), calculates the difference, and outputs the difference. This comparator (14) drives the drive unit (1).
6), the driving device (16) causes the projector (8) to constantly illuminate the workbench (6) with a signal from the comparator (14) so that the workbench (6) is illuminated. Following the movement of, the pole (7) is expanded and contracted.

With the above configuration, when performing work by using a work platform at night at night, the control device (12) is operated to turn the turntable (3), and the telescopic boom (4) is telescopically operated and undulated. When the workbench (6) is moved to the work position by operating it, the calculator (13) causes the workbench (6) to move by the signals from the first extension / contraction length detector (9) and the undulation angle detector (10). The height is calculated, and the comparator (1) is calculated based on the signal from the calculator (13) and the signal from the second expansion / contraction length detector (11).
4) compares the height of the workbench (6) with the height of the pole (7) and calculates the difference. The signal from the comparator (14) activates the drive unit (16) to move the pole (7). ) Is expanded and contracted so that the projector (8) always irradiates the work site on the work table (6) with light as shown in FIG. 3, and in this state, the control device (12) is operated. By activating the floodlight (8), the work site is illuminated and night work can be safely performed, and the electrical insulation performance of the tip boom (4c) is maintained. It can also be used for electrical work.

Further, even if the control device (12) is operated during work to change the height of the workbench (6), the calculator (13) always calculates the height of the workbench (6) and the comparator ( 14) compares the height of the workbench (6) with the height of the pole (7), calculates the difference, and actuates the drive unit (16) to expand and contract the pole (7). 8) is the workbench (6)
The light projector (8) constantly irradiates the work site with light.

(7) Effects of the Invention As described above, according to the present invention, the telescopic pole is vertically set up above the turntable, and the floodlight is attached to the tip of the pole according to the height of the workbench. The pole is expanded and contracted so that the projector always irradiates the work site on the workbench with light, so there is no limit to the irradiation time and lighting for aerial work vehicles that does not impair the insulation performance of the boom. A device is provided, and the present invention is effective in improving the efficiency of night work performed using an aerial work vehicle.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a side view showing a traveling state of an aerial work vehicle, FIG. 2 is a block diagram showing a control circuit of a pole, and FIG. 3 is a work of an aerial work vehicle. It is a side view which shows a state. 1 ... Car body, 3 ... Turntable, 4 ... Telescopic boom, 6 ... Workbench, 7 ... Pole, 8 ... Floodlight, 13
…… Calculator, 16 …… Drive device.

Claims (1)

[Scope of utility model registration request] 1. An illuminating device for an aerial work vehicle, comprising a work table at the tip of a boom pivotably mounted on a turntable rotatably mounted on a vehicle body, and is vertically erected vertically on the turntable. A retractable pole, and a projector attached to the tip of this pole to illuminate the workbench with light.
A computing device for computing the height of the workbench, and a drive device for expanding and contracting the pole according to the computation result of the computing device so that the floodlight always illuminates the work site. Lighting equipment for aerial work vehicles.