JPH0626552Y2 - Work range control device for aerial work vehicles - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a work range control device for an aerial work vehicle, and more particularly, to at least two types of control data for position data detected by a turning position detector of a bucket. By inputting to the control radius selector, the specific control data is selected and input to the comparator, and the comparison with the work radius data of the boom input from the work radius calculator is performed by the comparator. The present invention relates to a work range control device for an aerial work vehicle, which controls the operation of the boom and / or the bucket based on the comparison data obtained by the comparator.

[Prior art]

As shown in FIGS. 4 (a) and 4 (b), the vehicle 20 is set in a stable state in order to determine the regulation range by the work range regulation device (especially the angle regulation device) in the conventional aerial work vehicle 20. On the condition that the bucket 21
The regulation range is determined in the most unfavorable state (or arm), that is, in the state shown by the solid line in FIG.

Therefore, the bucket 21 that can swing freely is attached to the tip of the boom 22.
The aerial work vehicle 20 including
In reality, the restriction angle is determined regardless of the turning position (angle, that is, the state shown by the phantom line in FIG. 7B).

[Problems to be solved by the device]

Therefore, in an aerial work vehicle 20 that is heavy and has a bucket 21 with a long turning portion via an arm, the bucket 21 turns to the inverted side, that is, the position of the imaginary line shown in FIG. In this position, although the bucket 21 is originally in the range where safe operation can be performed without touching the turning regulation, once the regulation works, the bucket 21 cannot be operated unless the regulation state is released. For example, the boom does not go down to the bottom, it is very inconvenient, work efficiency,
There was a problem that it was extremely wasteful in terms of vehicle stability.

[Means for Solving the Purpose and Problem of Invention]

The present invention has been made in view of the above-mentioned problems, and an object thereof is to input the position data detected by the turning position detector of the bucket to a restriction radius selector having at least two kinds of restriction data. By doing so, the specific regulation data is selected and input to the comparator, and the comparator compares it with the boom working radius data input from the working radius calculator, and obtains it with the comparator. In order to provide a work range control device for an aerial work vehicle that restricts the operation of a boom and / or a bucket based on the comparison data, a high work vehicle equipped with a swingable bucket at the tip of the boom is provided. In addition, a boom length detector, a boom hoisting angle detector, and a bucket swing position detector are provided, and the data detected by the boom length detector and the boom hoisting angle detector are stored in a working radius calculator. Force is applied to obtain the working radius of the boom, and the position data detected by the turning position detector of the bucket is input to a regulation radius selector having at least two types of regulation data, and the regulation radius selector performs specific regulation. The data is selected and input to the comparator in the next stage, the comparator compares it with the work radius data of the boom input from the work radius calculator, and the comparison data obtained by the comparator is used. And a drive restricting device for the bucket, so that the operation of the boom and / or the bucket is restricted.

[Action]

Since the above configuration is adopted, when the bucket is located on the boom side (reversing and tilting side), the conventional work range limiting device for aerial work platforms is under regulation, but it is still sufficient. The boom or bucket can be operated with a sufficient margin, and therefore a very wide stability can be obtained. In particular, when the overhang width of the jack was the smallest, the conventional work range control device had a problem that the boom could not be lowered to the bottom and was extremely inconvenient. However, in the present invention, such problems are solved and work efficiency is significantly improved.

〔Example〕

Hereinafter, one embodiment of the work range control device for an aerial work vehicle according to the present invention will be described in detail with reference to FIGS. 1, 2 and 3 (a), (b).

In the figure, 1 is an aerial work vehicle equipped with a work range control device 2 according to the present invention, 3 is a turntable, 4 is a boom, 5 is a hoisting cylinder, 6a and 6b are balance cylinders, and 7 is a telescopic cylinder. , 8 is a bucket, 9 is a boom length detector, 10 is a boom hoisting angle detector, and 11 is a turning position detector of the bucket 8.

By the way, the working range control device 2 receives a predetermined data detected by the boom length detector 9 and the boom hoisting angle detector 10 to obtain a working radius of the boom 4, and a working radius calculator 2a, and the bucket 8 Restriction radius selector 2b for inputting the data detected by the turning position detector 11 and at least two kinds of restriction data (angle I and angle II shown in FIG. 3 (b)) to the restriction radius selector 2b. The regulation data unit 2c and the regulation data unit 2d to be provided, the predetermined regulation data (the data of the angle I or the data of the angle II) selected by the regulation radius selector 2b, and the working radius calculator 2a are input. A comparator 2e that compares the work radius data of the boom 4 and a drive restricting device 2 that restricts the operation of the boom 4 and the bucket 8 based on the comparison data obtained by the comparator 2e.
f and.

Hereinafter, the operation of the work range control device for an aerial work vehicle according to the present invention will be described based on the above configuration.

That is, the work range control device 2 of the aerial work vehicle 1 according to the present invention
Inputs the data detected by the boom length detector 9 and the boom hoisting angle detector 10 to the working radius calculator 2a to obtain the working radius of the boom and the position detected by the turning position detector 11 of the bucket 8. The data is input to the regulation radius selector 2b having at least two types of regulation data (data of a certain fixed range I, II), and the regulation radius selector 2b
Therefore, either one of the specific regulation data (data of a certain fixed range I, II) [that is, this identification is determined by the current turning position (angle) of the bucket 8]. ] Is input to the comparator 2e at the next stage, and the comparator 2e compares the work radius data of the boom input from the work radius calculator 2a with the comparator 2e. Since the comparison data is input to the drive restricting device 2f for the boom 4 and the bucket 8 so as to restrict the operation of the boom 4 and / or the bucket 8, the bucket 8 is located on the boom 4 side (inverted inverting side FIG. 3 (b)). In the direction (I) shown in FIG. 2), the boom 4 to the bucket 8 can be freely operated without restricting the drive restricting device 2f against the boom 4 to the bucket 8 with a sufficient margin. Is obtained. Especially, even when the overhanging width of the jack is minimum, the boom 4 can be stably lowered to the bottom, and the working efficiency is remarkably improved.

[Effect of device]

As described in detail above, the present invention provides a boom length detector, a boom hoisting angle detector, and a bucket swing position detector for an aerial work vehicle equipped with a swingable bucket at the tip of a boom. Is provided, and the data detected by the boom length detector and the boom hoisting angle detector are input to a work radius calculator to obtain the work radius of the boom, and at least the position data detected by the turning position detector of the bucket is obtained. The control radius selector having two kinds of control data is input, and the control radius selector selects specific control data and inputs it to the comparator in the next stage. A comparison is made with the boom working radius data that is input, and the comparison data obtained by the comparator is input to the boom and bucket drive restricting device, so that the operation of the boom and / or bucket is controlled. Since it is configured to control, when the bucket is located on the boom side (reversal inclining side), the conventional work range control device for aerial work platforms is under restriction, but there is still a sufficient margin. It is possible to operate the boom or bucket with the aid of which, therefore, a very wide stability is obtained. In particular, when the overhang width of the jack was the smallest, the conventional work range control device had a problem that the boom could not be lowered to the bottom, which was very inconvenient. However, the present invention solves such problems and has an excellent effect such that work efficiency is significantly improved.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an aerial work vehicle equipped with a work range regulating device according to the present invention, FIG. 2 is a block diagram showing the work range regulating device according to the present invention, and FIG. ) And (b)
Fig. 4 is an explanatory view of the operating condition of an aerial work vehicle controlled by the work range regulating device according to the present invention; Figs. 4 (a) and 4 (b) are operation of the aerial work vehicle controlled by the conventional work range regulating device. It is a situation explanatory view. 1 ... Aerial work vehicle, 2 ... Work range control device, 3 ... Turntable, 4 ... Boom, 5 ... Elevating cylinder,
6a, 6b ... Balance cylinder, 7 ... Telescopic cylinder, 8 ... Bucket, 9 ... Boom length detector, 10
...... Boom hoisting angle detector, 11 ...... Turning position detector, 2
a: Working radius calculator, 2b: Restriction radius selector, 2c
...... Regulation data device, 2d ...... Regulation data device, 2e ...... Comparison device, 2f ...... Drive regulation device.

Claims (1)

[Scope of utility model registration request] 1. An aerial work vehicle equipped with a swingable bucket at the tip of a boom, provided with a boom length detector, a boom hoisting angle detector, and a bucket swing position detector. The data detected by the height detector and boom hoisting angle detector are input to the work radius calculator to obtain the work radius of the boom, and at least two types of position (angle) data detected by the turning position detector of the bucket are obtained. Input to a restriction radius selector having restriction data, select specific restriction data with the restriction radius selector, input to the comparator in the next stage, and input from the working radius calculator with the comparator. The comparison data obtained by the comparator is input to the drive regulation device for the boom and bucket to regulate the operation of the boom and / or bucket. Working range restricting device of aerial work platforms, characterized in.