JPH0720151Y2 - Aerial work vehicle - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a tip of a multi-stage boom that is provided on a turntable so as to extend and retract, and a first bucket is attached to the tip of the boom, and the tip of a boom other than the tip boom is attached. The present invention relates to a two-bucket type aerial work vehicle in which an undulating and extendable arm is attached to the arm, and a second bucket is attached to the tip of the arm.

[Prior art]

Currently, as an aerial work vehicle for efficiently performing various work at high places, such as transmission line work, communication line work, installation and replacement work of various signs such as highways, and painting work of buildings etc. Is a so-called two-bucket system in which the base end of an expandable telescopic boom is pivotally supported by a turntable provided on a chassis so that the boom can be raised and lowered and a pair of arms are attached to the tip of the boom, for example, two buckets. Aerial work vehicles have also been developed.

[Problems to be solved by the device]

However, a conventional two-bucket type aerial work vehicle, which has been conventionally developed, includes two vertically mounted support shafts pivotally mounted on the boom head at the tip of the multi-stage boom, which are mounted so as to be capable of turning in substantially the same horizontal plane. Since one bucket is attached to the tip of each arm so that it can swing freely, there is almost no difference in height between the two buckets, so work at heights at approximately the same height can be divided into left and right joint work. If you want to carry out
It can be carried out very efficiently compared to the case of using a one-bucket type aerial work vehicle, but there is a difference in elevation at the aerial work position such as transformer pole work in electric line work. In addition, it is impossible to perform high-altitude work together at the same time. In such high-altitude work, the functions of the two buckets cannot be utilized, so that the upper and lower high-altitude work cannot be performed separately. Or to prepare another aerial work vehicle and carry out aerial work jointly with different heights in different buckets equipped on each aerial work vehicle, Therefore, the work is very complicated,
The work cost is high, and there are various problems such as a large parking space is required when two high-speed work vehicles are introduced to perform work at high heights.

[Means and Actions for Solving Problems]

The present invention has been made in view of the above circumstances, and an object of the present invention is to attach a first bucket to the tip of the tip boom of a multistage boom that is provided on a turntable so as to be undulated and telescopic, Undulations at the tip of the boom,
The present invention is to provide a two-bucket type aerial work vehicle in which a retractable arm is attached and a second bucket is attached to the tip of the arm. For this purpose, a turntable mounted on a chassis and a undulation on the turntable are provided. A multi-stage boom equipped to extend and retract, a first bucket attached to the tip of the tip boom of the multi-stage boom, an arm provided at the tip of a boom other than the tip boom of the multi-stage boom, and a tip of the arm. It is composed of the attached second bucket.

[Action]

Since the above configuration is adopted, it is possible to perform predetermined work quickly and efficiently with one aerial work vehicle when performing work with height differences at the same work site. Therefore, it is possible to significantly reduce the work cost.

〔Example〕

An embodiment of an aerial work vehicle according to the present invention will be described in detail below with reference to FIGS. 1 and 2.

In the figure, reference numeral 1 denotes an aerial work vehicle according to the present invention. The aerial work vehicle 1 has a subframe 1a mounted on a chassis and has a sufficient strength even if various bodywork to be described later are mounted. And is configured to be safe. Reference numeral 2 denotes an outrigger which is provided on the left and right sides of the sub-frame 1a so as to extend in the left-right direction of the sub-frame 1a so that it can be grounded. There is.

Reference numeral 3 denotes a turntable mounted on the front side of the subframe 1a, and the turntable 3 is configured so as to be able to turn left and right by a hydraulic motor (not shown) arranged in the subframe 1a. ing. Reference numeral 4 denotes a multi-stage boom whose base end is rotatably supported on the turntable 3 (in the present embodiment, a boom having a three-stage telescopic structure including a base end boom 4a, an intermediate boom 4b and a tip boom 4c is exemplified). For raising and lowering the multi-stage boom 4, the bottom of the cylinder tube 5a is pivotally attached to the turntable 3 side, and the tip end of the piston rod 5b is pivotally attached to a bracket 4d attached to the lower surface of the proximal boom 4a at substantially the center thereof. It is configured to be performed by expansion and contraction of.

The intermediate boom 4b and the tip boom 4c of the multi-stage boom 4 are also included.
The expansion / contraction is performed by an expansion / contraction cylinder (not shown) built in the multi-stage boom 4.

Reference numeral 6 is a first bucket which is swingably attached to the tip of a first arm 6c which is attached to a vertical support shaft 6b which is attached to a boom head 6a of the tip boom 4c so as to be rotatable in a horizontal plane. The second bucket is attached to the tip of a second arm 7b that is undulated and expandable and retractable on a bracket 7a attached to the tip of the intermediate boom 4b.

The undulation of the second arm 7b is performed by the undulation cylinder 7c arranged between the bracket 7a and the second arm 7b.
The extension / contraction of the arm 7b is configured to be performed by an extension / contraction cylinder (not shown in the figure) built in the second arm 7b.

By the way, when the hoisting operation of the multistage boom 4 of the first bucket 6 is performed, the equilibrium is maintained by the hoisting cylinder 5 of the multistage boom 4.
The first that works in conjunction with the balance cylinder 8
The balance cylinder 8a (disposed between the boom head 6a and the vertical support shaft 6b) performs the balance holding of the second bucket 7 mounted at the tip of the second arm 7b and the second arm 7b. Bracket 7d interposed between the second buckets 7
A second balance cylinder 9 provided on the lower surface (the second balance cylinder 9 is configured to operate the link mechanism 10 disposed between the bracket 7d and the tip of the second arm 7b), and the second balance cylinder. It is configured to be performed by a gravity type control device (not shown in the figure) that controls expansion and contraction of the cylinder 9.

The operation of the aerial work vehicle according to the present invention will be described below based on the above configuration.

That is, when the aerial work vehicle 1 according to the present invention is introduced to an aerial work site such as a power line construction to perform a predetermined aerial work,
First, the aerial work vehicle 1 is parked at the work site, the outriggers 2 mounted on the front, rear, left and right sides of the chassis are projected to fix the aerial work vehicle 1 in a stable manner, and then the worker is placed in the first and second buckets 6 and 7. The buckets 6 and 7 are loaded with various equipment, tools, etc. required for high-altitude work, and the operator on the first bucket 6 operates the upper operation device to set the multi-stage boom 4 to a predetermined position from the boom receiver. When a turning operation is required while undulating or extending to the height of the turntable 3, the turntable 3 is turned to guide both buckets 6 and 7 to the vicinity of the intended work position at a high place.

In the above guiding operation of both buckets 6 and 7, for example, a state in which a worker who is on the first bucket 6 attached to the tip of the tip boom 4c via the first arm 6c immediately enters a predetermined high-altitude work at a high position. Then, the turntable 3 and the multistage boom 4 are guided and operated. When the high-altitude work position of the first bucket 6 is determined in this way, the worker boarding the second bucket 7 attached via the second arm 7b attached to the tip of the intermediate boom 4b next moves to the second bucket 7. The upper operation device provided is operated to guide the second bucket 7 to a predetermined work position at a high place. This guiding operation is performed by the second arm 7b and the bracket 7a.
This is done by operating the undulating cylinder 7c arranged between them.

Incidentally, the equilibrium holding of the bucket 6 at the time of guiding operation of the first bucket 6 is operated by interlocking with a balance cylinder 8 provided side by side with a hoisting cylinder 5 provided between the base end boom 4a of the multistage boom 4 and the turntable 3. First balance cylinder
The balance of the bucket 7 is maintained by the operation of the second bucket 7 during the guiding operation of the second bucket 7 and is linked to the hoisting cylinder 7c arranged between the bracket 7a provided at the tip of the intermediate boom 4b and the second arm 7b. Since the two balance cylinders 8b are held with high precision, the operation of guiding both buckets 6 and 7 to the intended work position at a high place can be performed very easily.

Then, both the buckets 6 and 7 are set to a desired work position at a high place where there is a difference in height, and both workers who board the both buckets 6 and 7 in this set state are, for example, the first
As shown in the figure, it is possible to work on high places with height differences such as pole work of the transformer T at the same time up and down,
It is possible to perform work at a high place on the site having such a height difference very easily, quickly and efficiently.

[Effect of device]

As described in detail above, the present invention provides a turntable mounted on a chassis, a multi-stage boom that is provided on the turntable so as to be undulated and extendable, and a first bucket attached to the tip of the tip boom of the multi-stage boom. Since it is composed of an arm that is provided at the tip of a boom other than the tip boom of the multi-stage boom so that it can be raised and lowered, and a second bucket that is attached to the tip of the arm, work with height differences even at the same work site In carrying out the above, it is possible to perform a predetermined work quickly and efficiently with one aerial work vehicle, and it is possible to greatly reduce the work cost, and various excellent effects are obtained. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an aerial work vehicle according to the present invention, and FIG. 2 is a side view showing a bucket portion of the aerial work vehicle. 1 ... Aerial work vehicle, 1a ... Subframe, 2 ... Outrigger, 3 ... Turntable, 4 ... Multistage boom, 4a ...
… Base boom, 4b …… Middle boom, 4c …… Tip boom,
4d …… Bracket, 5 …… Release cylinder, 5a …… Cylinder tube, 5b …… Piston rod, 6 …… First bucket, 6a …… Boom head, 6b …… Vertical support shaft, 6c …… First arm, 7 …… Second bucket, 7a …… Bracket, 7b
...... Second arm, 7c ...... Release cylinder, 7d ...... Bracket, 8 ...... Balance cylinder, 8a ...... First balance cylinder, 9 ...... Second balance cylinder, 10 ...... Link mechanism, T ...... Transformer.

Claims (1)

[Scope of utility model registration request] 1. A turntable mounted on a chassis, and a multi-stage boom provided on the turntable so as to be capable of undulating and expanding and contracting.
The multistage boom has a first bucket attached to the tip of the boom, a arm that is provided up and down at the tip of a boom other than the tip boom of the multistage boom, and a second bucket attached to the tip of the arm. An aerial work vehicle characterized by that.