JPS5950600B2 - Crane device for aerial work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a workbench is rotatably provided at the tip of a boom, and arranged so that the center of rotation of the workbench and the center of rotation of a crane device mounted on the boom side are on the same axis. In addition, the crane device and the workbench can be connected and fixed, and by fixing or releasing the workbench and the crane device, the crane device can be rotated together with the workbench, or the crane device alone can be rotated. To provide a crane device for a high-altitude work vehicle that can independently rotate and has excellent workability.

Conventionally, there is a crane device attached to a work platform installed on an aerial work vehicle, but the rotating part of the crane device is fixed to the boom side and is a separate structure from the work platform. It is inconvenient to handle and has poor workability.

The present invention solves the above-mentioned drawbacks, and embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Reference numeral 1 denotes an aerial work vehicle, and a conventionally known boom 2 is mounted on the vehicle frame so as to be extendable, retractable, undulating, and pivotable.

3 is a workbench installed at the tip of the boom 2. When working, it is kept in a horizontal state (position shown by chain lines in Figure 1) by a balance device (not shown), and when traveling, it is in a stored position with the balanced state released. (solid line position in Figure 1).

Further, the workbench 3 is configured to be able to rotate relative to the boom 2 by the operation of a rotation mechanism 4.

On the other hand, a crane device 5 is installed at the tip of the boom 2.

The crane device 5 includes a post outer cylinder 6 fixed to the boom 2 side, a post inner cylinder 7 rotatably supported within the outer cylinder, and a pivot part 9 that pivots freely relative to the inner cylinder 7. A winch bracket 12 is equipped with a winch mechanism 13 and can be fixed to the undulating plate 8 with pins 14. A winch boom 1 is attached to the winch bracket 12 so that its length can be expanded and contracted by connecting a plurality of pin holes 16 and pins 16'.
5, and each of these constituent parts is constructed so that it can be easily assembled and disassembled.

In this embodiment, the undulating plate 8 and the winch bracket 12 are constructed separately so that they can be separated or fixed by inserting and removing the pin 14. However, the separation structure using the pin 14 may be abolished, and both may be integrated in advance to form an undulating bracket.

On the workbench 3, a lever 18 is rotatably pivoted 18' to a bracket 17 fixed near the end thereof, and a connecting pin 19 provided at one end of the lever 18 is attached to the bracket 17. It is inserted into the provided boss 19'.

On the other hand, the flange 20 of the post inner cylinder 7 has a large number of concentric holes 2.
1 is bored, and the connecting pin 19 of the lever 18 is always fitted into this hole 21 by the weight of the lever 18.

Therefore, the workbench 3 and the crane device 5 are integrated through the connecting pin 19, and when the lever 18 is pulled upward against its own weight as shown by the chain line in FIG.
As long as 9 is not pulled out from hole 21, the integral relationship between the two is maintained.

In addition, the reference numeral 22 is an operating lever for operating the rotating mechanism 4, etc. of the workbench 1, and the reference numeral 23 is a pin that connects the post outer cylinder 6 and the post inner cylinder 7 when they are stored.
This allows for free rotation relative to the

Next, the operating state of this device will be explained.

A post inner cylinder 7 is rotatably supported within a post outer cylinder 6 fixed to the boom 2 side, and furthermore, the rotation center of the workbench 3 and the rotation center of the crane device 5 are on the same axis.

Further, the swinging part of the crane device 5 is fixed to the workbench 3 side by a connecting pin 19, and when driving the swinging mechanism 4 with the connecting pin 19 inserted, the crane device 5 and the workbench rotate as one.

When the connecting pin 19 is pulled out against the weight of the lever 18, only the work platform 3 is driven to rotate, and the crane device 5 can be manually rotated to an arbitrary rotation angle, and the connecting pin 19 is pulled out again. When the crane device 5 is inserted and the crane device 5 is fixed, crane work can be performed at that position.

This crane device 5 can be moved to the undulating position by inserting a pin 11 into one of the many holes bored in the undulating plate 8 which is pivoted by a pivot 9 so as to be able to rise and fall with respect to the inner post cylinder 7. can be changed arbitrarily, and winch boom 15
The length of the boom 15 is adjusted by inserting a pin 16' into one of the pin holes 16 drilled in the winch bracket 12, and the winch mechanism 13 attached to the winch bracket 12 is operated.
Crane work can be performed by freely operating the crane device 5 in each direction of extension/contraction, up/down, and rotation.

As described above, the present invention utilizes the rotating mechanism of the workbench to enable simultaneous rotating operation of the crane device.
Not only does it expand the range of operation and significantly improve work efficiency, but each component can be easily assembled and disassembled, reducing the weight of the vehicle and making it easier to handle, increasing work efficiency at heights. It is an extremely excellent and advanced technical invention that has the following effects and benefits the industry.

[Brief explanation of drawings]

The attached drawings show embodiments of the present invention, and Fig. 1 is a schematic diagram of a high-altitude vehicle equipped with this device, Fig. 2 is an overall side view of this device, and Fig. 3 is an enlarged front view of main parts. , FIG. 4 is a partial side view thereof, and FIG. 5 is a partial perspective view of the main part. 1...Work vehicle, 2...Boom, 3...
...Workbench, 4...Swivel mechanism, 5...
... Crane device, 6... Post outer cylinder, 7...
... Post inner cylinder, 8 ... Relief plate, 9
...Central branch, 10...Perforation, 11...
...Pin, 12...Winch bracket,
13...Winch mechanism, 14...Pin, 15...Winch boom, 16...
Pin hole, 17...Bracket, 18...
・Lever, 19... Connection pin, 20...
...Flame, 21...Hole, 22...Operation rod, 23...Pin.

Claims (1)

[Claims] 1. In an aerial work vehicle with a work platform attached to the tip of the boom, the work platform can be rotated with a rotation mechanism relative to the boom, and a crane device is installed on the boom side so that the work platform can rotate freely. 1. A crane device for an aerial work vehicle, characterized in that the crane device and the work platform can be connected to each other so that the crane device and the work platform can be rotated simultaneously with the work platform.