JPH0547196Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field The present invention relates to an operating device for an aerial work vehicle equipped with a lifting device at the tip of the boom.

(2) Prior Art It has been known for some time that an aerial work vehicle equipped with two work platforms at the tip of the boom includes a lifting device at the tip of the boom.

(3) Problems that the invention aims to solve However, since conventional aerial work vehicles are equipped with operating devices for operating the boom and lifting device only on one work platform, It is said that work efficiency is poor because the lifting equipment cannot be operated, and when a worker works alone, he or she must climb onto a work platform equipped with an operating device. There was a problem.

(4) Means for solving the problem In order to solve the above problem, the present invention has a post that is balanced at the tip of the boom, and a post that is pivoted to the post so that it can swing freely in a horizontal plane. In an aerial work vehicle equipped with a pair of arms, a workbench attached to the tip of each arm so that it can swing freely, and a lifting device attached to the top end of the post, operate the lifting device on each workbench. A control device is provided on the vehicle body to control the operation of the lifting device based on signals from these operating devices.

(5) Effect With the above configuration, no matter which of the operating devices provided on both workbenches is operated, the control device is activated by a signal from the operated operating device, and the lifting device is activated.

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

As shown in FIGS. 2 and 3, in the aerial work vehicle, a turntable 3 is rotatably mounted on a vehicle body 1 supported by outriggers 2, and a base end of a telescoping boom 4 is mounted on the turntable 3. is supported,
The telescopic boom 4 has a built-in telescopic device (not shown)
It expands and contracts, and also rises and falls due to the expansion and contraction of the undulation cylinder 5. A post 6 is pivotally supported at the tip of the telescopic boom 4 so as to be able to swing freely in the vertical direction. Regardless, it is always maintained in an equilibrium state. The base ends of two arms 8 and 9 are pivotally supported on the post 6 so as to be able to swing in the horizontal direction, and each arm 8 and 9 swings independently by drive devices 10 and 11, respectively. Vertical shafts 12, 13 are provided at the ends of each arm 8, 9, and each vertical shaft 12, 13 has a workbench 1, respectively.
6 and 17 are pivotally supported to be able to swing freely in the horizontal direction, and each workbench 16 and 17 swings independently by drive devices 14 and 15, respectively. At the upper end of the post 6, a pivot post 18 is attached to the post 6 so as to be pivotable.
, a bracket 19 pivotably supported by the swing post 18 in a vertical plane, a winch 21 provided at the upper end of the bracket 19 and operated by a hydraulic motor 20, and a sub-boom 22 detachably inserted into the bracket 19. A lifting device 38 consisting of a rope 23 that is wound up and fed out by the winch 21 and a hook 24 that is attached to the tip of the rope 23 is attached. Each of the workbenches 16 and 17 is equipped with operating devices 25 and 26 that operate the hydraulic motor 20 that operates the winch 21 of the lifting device 38, and the turntable 3 is equipped with operating devices 25 and 2.
A control device 27 is provided which operates in response to a signal from 6 to operate the hydraulic motor 20.

FIG. 1 shows the operating circuit of the lifting device, in which operating devices 2 are provided on work platforms 16 and 17, respectively.
Reference numerals 5 and 26 denote a potentiometer lever 2 which is equipped with an operating lever and outputs a signal in proportion to the operation of the operating lever.
8, 29 and these potentiometer levers 28, 2
The turntable 3 is composed of optical transmitters 30 and 31 that convert signals from the turntable 3 into optical signals, respectively.
The control device 27 provided in the optical transmitters 30, 3
1 and an optical receiver 34 connected to the telescopic boom 4 via optical fiber cables 32 and 33,
This optical receiver 34 is connected to both workbenches 16 and 17.
a priority signal discriminator 35 that outputs a signal sent from one of the operating devices 25 with priority when signals are sent from the operating devices 25 and 26 at the same time;
It is comprised of an electromagnetic switching valve 36 which is switched by a signal from the priority signal discriminator 35 and supplies pressure oil discharged from a hydraulic pump 37 to the hydraulic motor 20 to operate the winch 21.

With the above configuration, when a worker on the workbench 16 or 17 operates the lifting device 38, he or she can operate the potentiometer lever 28 of the operating device 25 or the potentiometer lever 29 of the operating device 26. , potentiometer lever 2
8 or the signal output from the potentiometer lever 29 is converted into an optical signal by the optical transmitter 30 or the optical transmitter 31 and sent to the optical receiver 34, and the optical receiver 34 discriminates the sent signal as a priority signal. Vessel 3
5 to the electromagnetic switching valve 36, and the electromagnetic switching valve 3
6 is switched to operate the hydraulic motor 20, and the winch 21 is operated to wind up and let out the rope 23. In addition, workers on both work platforms 16 and 17 can simultaneously operate the potentiometer lever 2.
Even if the potentiometers 8 and 29 are operated, the priority signal discriminator 35 discriminates the signals sent via the optical transmitters 30 and 31 and the optical receiver 34, and the potentiometer lever 28
A signal is sent to the electromagnetic switching valve 36 with priority, and according to the operation of the operating device 25, the electromagnetic switching valve 36 is switched to operate the hydraulic motor 20, and the winch 21 is operated to wind up and let out the rope 23. .

(7) Effects of the invention As described above, in the present invention, since each workbench is equipped with an operating device for operating a lifting device,
An operating device for an aerial work vehicle is provided that allows the lifting device to be operated from either platform,
The present invention is effective in improving the workability of aerial work vehicles.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a circuit diagram showing the operating circuit of the lifting device, FIG. 2 is a side view of the aerial work vehicle, and FIG. 3 is a side view of the work platform of the aerial work vehicle. It is. 4... Telescopic boom, 6... Post, 8, 9...
Arm, 16, 17... Workbench, 25, 26...
Operating device, 27...control device, 38...lifting device.

Claims (1)

[Scope of utility model registration request] A post balanced at the tip of the boom, a pair of arms pivoted to the post so that they can swing freely in a horizontal plane, a workbench that is swingably attached to the tip of each arm, and the top end of the post. In an aerial work vehicle equipped with a lifting device attached to the platform, each work platform is equipped with an operating device for operating the lifting device, and a control device for controlling the operation of the lifting device based on signals from these operating devices is installed on the vehicle body. An operating device for an aerial work vehicle characterized by being provided on the top.