JPH0637273B2 - Aerial work equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a so-called vertical elevating type aerial work apparatus in which a workbench can be vertically moved up and down by expansion and contraction of a mast.

(Prior Art) Conventionally, in the above-mentioned vertical lifting type work apparatus for high places (so-called work vehicle for high places), a vertically movable mast is erected on a traveling body as a base, and a work platform is vertically mounted on the upper end of this mast. It is configured so that it can rotate around the axis (mast axis).

Compared to the structure in which a workbench is attached to the tip of a flexible arm such as the front attachment of a hydraulic excavator, this vertical lifting type work equipment is compactly stored when not in use (while running). There is an advantage that you can. On the other hand, according to the conventional device, there is a problem that the work range is narrow and the application is limited because the work table does not move horizontally.

On the other hand, in order to expand the work range, it is conceivable to attach a horizontally expandable arm to the upper end of the mast and attach a workbench to the tip of this arm. However, in this case, the width of the workbench must be reduced so that the workbench does not project outside the width of the base when the workbench is stored.Therefore, only one person can work on the workbench. It cannot be used when multiple workers are required to work in a line.

Further, when the communication line is erected along the road, or when the erection is repaired, the workbench needs to be moved laterally in parallel with the road. In this case, the workbench fixed type mentioned above, In both of the configurations using the retractable arm and the telescopic arm, the entire apparatus must be moved by the traveling movement of the traveling body, resulting in poor work efficiency.

(Object of the invention) Therefore, in the present invention, in the configuration using the telescopic arm, the width dimension of the workbench can be increased, and the workbench can be laterally moved easily and quickly regardless of the movement of the base. It is intended to provide an aerial work device that can be used.

(Structure of the Invention) The present invention has the following structure.

(A) A base, an extendable and retractable mast standing on this base, a horizontal arm attached to the upper end of this mast so as to be rotatable around a vertical axis, and a vertical axis at the tip of this arm. A worktable mounted to be rotatable around the arm, an arm rotation mechanism for rotating the arm, and a worktable rotation mechanism for rotating the worktable.

(B) The arm is configured to be expandable and contractable by a fixed arm that also serves as an auxiliary work table, a movable arm that is slidably connected to the fixed arm in the horizontal direction, and a drive unit that slides and drives the movable arm. thing.

(C) A swivel state in which the working table is formed in a rectangle whose depth dimension is less than or equal to the width dimension of the base and whose width dimension is larger than this depth dimension, and whose long sides match the extension and contraction direction of the arm. In order to obtain

With this configuration, even if the width of the workbench is large, the workbench can be kept within the width of the base by rotating the workbench so that the width of the workbench matches the length of the base during storage. It becomes possible. Further, the workbench can be moved laterally linearly by the combination of the swinging and extending / contracting operations of the arm and the swinging operation of the workbench.

(Example) An example of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a traveling body as a base, and a mast 2 is erected vertically on the rear upper surface of the traveling body 1. The mast 2 includes a plurality of mast members 21 ...
It is configured to be expandable and contractible by an expansion / contraction mechanism using a hydraulic cylinder (not shown) as a drive source, and a horizontal arm 3 is attached to the upper end of this mast 2.

The arm 3 includes a rectangular fixed arm 31 that functions as a corridor and an auxiliary work table, and a frame-shaped movable arm 3 that is slidably connected to the fixed arm 31 in the horizontal direction.
2 and a hydraulic cylinder (not shown) that slides and drives the movable arm 32. The fixed arm 31 is not shown at the upper end of the mast 2 at a position displaced from the center of the arm to one side in the length direction. It is mounted rotatably around a vertical axis (mast axis) l ₁ via a slewing bearing. In FIG. 4, reference numeral 4 denotes an arm swivel mechanism that swivels and drives the arm 3, and includes a swivel gear 41 fixed to the fixed arm 31 on the outer periphery of the swivel bearing, and the swivel gear 41.
Meshing with the drive gear 42 consists of a motor (electric motor with reduction gear or hydraulic motor) 43 for rotating the drive gear 42 is fixed to the mast upper end, the arm 3 is a vertical axis l ₁ by the rotation of the motor 43 You can turn around.

At the tip of the arm 3 (the tip of the movable arm 32), a rectangular workbench 5 having a width W dimension longer than the depth d dimension is provided around the vertical axis l ₂ at its center through a swivel bearing (not shown). It is rotatably mounted and is configured to be driven to rotate by the workbench rotation mechanism 6 shown in FIG. Like the arm swivel mechanism 4, the workbench rotation mechanism 6 rotates the drive gear 62 that is fixed to the workbench 5, the drive gear 62 that meshes with the swivel gear 61, and the movable arm 32 that is fixed. It consists of a driving motor 63.

In each figure, 33 is a fixed arm 31 of the arm 3.
Protective fences 51 are provided on the upper surface, and 51 are protective shelves provided on the upper surface of the workbench 5. When stored, the protective shelves 33 of the fixed arm 31 are folded outward as shown in FIG. The protective shelf 51 is folded on the workbench.

1 to 3 show the usage state of the work device at a high place, and FIG. 4 shows the storage state when it is not used. When the work table 5 is used, its long side portion is usually in a state of facing the work object, and when not in use, the width direction thereof coincides with the length direction of the arm 3 by swiveling around the vertical axis l _2. In this state, they are arranged in front of the arm 3 and stored on the traveling body 1 in the traveling body length direction. In this way, the workbench 5
Since the worktable itself can be stored in a state where its width direction coincides with the length direction of the traveling body 1, the width W dimension of this working platform 5 is larger than the width dimension of the traveling body 1, that is, at the time of use. The size can be set to be large so that a plurality of workers can work side by side in the width direction of the work table. In other words, the work table 5 can be sufficiently accommodated within the width of the traveling body in the retracted state while keeping the work table width W large. For this reason, it can be conveniently used for work that requires a plurality of workers to work side by side, such as installation or replacement of communication lines. When a large number of people who cannot work with the workbench 5 alone are working at the same time, the workbench 5 is fixed in a state in which the width direction of the workbench 5 coincides with the lengthwise direction of the fixed arm 31, as shown by the phantom line in FIG. The fixed arm 31 and the workbench 5 can be combined to be used as a workbench.

Further, when using this high-altitude work apparatus, the work range can be expanded by expanding and contracting the arm 3, and the work table 5 can be used.
With the turning operation of the work table 5, the work table 5 can be easily set in the direction or position where the work can be performed most easily. In particular, when it is necessary to move the work table 5 laterally along the overhead wire such as installation or replacement of a communication line, it is not necessary to move the traveling body 1, and as shown in FIG. By combining the expansion and contraction of 3 and the swing operation and the swing operation of the workbench 5, the workbench 5 can be easily moved laterally in a straight line.

By the way, in the above embodiment, the arm 3 is pivotally attached to the upper end of the mast 2. However, the arm 3 is fixed to the upper end of the mast and the mast 2 is pivotally attached to the traveling body 1 about the vertical axis. May be configured to be rotatable. Further, a base having no self-propelling function may be used as the base instead of the traveling body 1 as in the above-mentioned embodiment.

(Effects of the Invention) As described above, when using the high-altitude work apparatus of the present invention, a telescopic arm rotatable about the vertical axis is provided at the upper end of the mast,
Since the workbench is attached to the telescopic arm, the work range can be expanded by extending and retracting the arm.

Moreover, since the workbench is attached to the arm so that it can be swiveled around the vertical axis, (b) Even when the workbench has a large width, the workbench can be swung in the width direction by the swivel function when stored. It can be set so as not to project outside the width of the base in line with the vertical direction. That is, it is possible to increase the capacity of the workbench, and thus it can be conveniently used for work that requires a plurality of workers to work side by side at the same time, such as erection of communication lines or repair work thereof.

(B) In the above work, etc., when the workbench is moved laterally in a straight line, the workbench can be moved by the combination of the extension and contraction and swing operation of the arm and the swivel operation of the workbench. It is possible to make a horizontal straight line movement easily and quickly without having to.

Due to these points, it is possible to expand the applications of the aerial work apparatus and realize the efficiency of various aerial work.

[Brief description of drawings]

FIG. 1 is a perspective view of a use state showing an embodiment of the present invention, FIG.
The figure is the same front view, FIG. 3 is the same plan view, and FIG. 4 is the side view of the same storage state. 1 ... running body as a base, 2 ... mast, 3 ... arm, 31 ... fixed arm, 32 ... movable arm, 4 ...
Arm rotation mechanism, 41 ... Rotation gear of the same mechanism, 42 ...
The drive gear, 43 ... the motor, 5 ... the workbench, 6 ...
Workbench rotation mechanism, 61 ... Rotation gear of the same mechanism, 62 ...
Same drive gear, 63 ... Same motor.

Claims (1)

[Claims] 1. An aerial work apparatus having the following configuration. (A) A base, an extendable and retractable mast standing on this base, a horizontal arm attached to the upper end of this mast so as to be rotatable around a vertical axis, and a vertical axis at the tip of this arm. A worktable mounted to be rotatable around the arm, an arm rotation mechanism for rotating the arm, and a worktable rotation mechanism for rotating the worktable. (B) The arm is configured to be expandable and contractable by a fixed arm that also serves as an auxiliary work table, a movable arm that is slidably connected to the fixed arm in the horizontal direction, and a drive unit that slides and drives the movable arm. thing. (C) A swivel state in which the working table is formed in a rectangle whose depth dimension is less than or equal to the width dimension of the base and whose width dimension is larger than this depth dimension, and whose long sides match the extension and contraction direction of the arm. In order to obtain