JP2922656B2 - Boom type aerial work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boom type aerial work vehicle used for harvesting work in an orchard and various construction works outdoors.

[0002]

2. Description of the Related Art Conventionally, an aerial work vehicle is configured such that an upper boom having a work deck is connected to an upper end of a lower boom which can be raised and lowered by a hydraulic cylinder, and the upper boom is vertically moved by another hydraulic cylinder. Some of them are movable, and others have a working deck connected to the upper end of a main boom that can be extended and retracted by a hydraulic device.

However, in any of the above-mentioned boom type aerial work vehicles, the work deck cannot be vertically moved vertically. Therefore, in recent years, there is an aerial work vehicle in which a pantograph-like elevating device is provided on a traveling vehicle and a work deck is mounted on the elevating device.

[0004]

However, in this case,
Since the traveling trolley portion is configured to be wider than the work deck portion, for example, in the construction of a side wall of a building, the work deck portion cannot be approached to the side wall, and therefore, in this case, There have been problems such as various restrictions on the work location and the complicated lifting device.

[0005]

According to the present invention, a base of a first boom that is inclined rearward on a turntable is pivotally supported on a turntable by a hydraulic cylinder for elevating and lowering.
A boom-type aerial work vehicle, in which a second boom having a working deck provided on an upper side thereof and having a working deck on the upper side is connected to the upper part of the boom via a horizontal pivot, the second boom is connected to the first boom. The first boom, which is longer than the boom, supports a parallel holder on the horizontal pivot shaft, and moves between the parallel holder and the turntable 7 in parallel with the first boom. A parallel link is provided, a second parallel link is provided between the parallel holder and the work deck and moves in parallel with the second boom, and the turntable 7 and the second boom can be swung. The upper end of the second link is located at a position rearward of the parallel holding member mounting position while the base is pivotally supported by the rear portion of the turntable.
In conjunction with the boom, the work deck was raised almost vertically at a certain height and moved to the center of the fuselage at the upper position to provide a boom type aerial work vehicle. Is what you do.

[0006]

When the boom type aerial work vehicle is used in an orchard or the like, the body is moved to a predetermined work position to extend the lifting hydraulic cylinder.

[0007] Then, the first boom rotates upward and operates in the upright state, and accordingly, the interlocking link for the boom holds the rear end of the second boom in a tensioned state. Is in a standing state while rising upward substantially vertically.

The work deck can be raised and lowered almost vertically at a certain height while maintaining a horizontal state by the action of the first parallel link, the parallel holding body and the second parallel link.

When the second boom stands up to the maximum and the work deck is at the highest position, the work deck moves to the center of the machine to stabilize the machine.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the accompanying drawings.

1 and 2 show side views of a boom type aerial work vehicle according to the present invention. In the drawing, reference numeral 1 denotes a traveling device of a boom type aerial work vehicle A, in which an endless footwear 4 is rotatably wound around a driving wheel 2 and a driven wheel 3. Reference numeral 5 denotes a traveling frame, and a swing bearing portion 6 is suspended from a central portion. Reference numeral 7 denotes a turntable to be mounted on the swivel bearing portion 6, and a boom bracket 8 having a triangular side shape protrudes from an upper portion thereof.

Reference numeral 9 denotes a base mounting pin 10 on the traveling frame 5 side and a mounting pin projecting below the turntable 7.
A hydraulic cylinder for rotation provided between the rotary table and the hydraulic cylinder for rotation of the turntable.

Reference numeral 12 denotes a swivel joyton provided below the turntable 7, which is integrally fitted with the swivel bearing 6 to form a swivel portion 6A.

13, the base 13-1 is connected to the boom bracket 8
The second boom 15 is connected to the upper end 13-2 of the first boom via a horizontal pivot shaft 14. Reference numeral 16 denotes a mounting shaft for pivotally connecting the base 13-1 of the first boom 13 to the boom bracket 8. Reference numeral 17 denotes an elevating hydraulic cylinder provided between the turntable 7 and the upper part of the first boom 13, and the first boom 13 can be raised and lowered by the elevating hydraulic cylinder 17. Reference numeral 18 denotes a mounting pin to which the lifting hydraulic cylinder 17 is mounted.

Reference numeral 19 denotes a triangular parallel holding member which is supported on the horizontal pivot shaft 14, and a lower end portion of the parallel holding member 19.
A first parallel link 20 that moves in parallel with the first boom 13 is provided between the turntable 19-1 and the turntable 7 in a bridging manner. 20-1 and 20-2 are mounting pins for the first parallel link 20.

A work deck 21 is connected to the upper end of the second boom 15. The work deck 21 and the upper end 19 of the parallel holder 19 are connected to the work deck 21.
-2 between the second boom 15 and the second
The parallel link 22 is provided in a bridging manner. 23 is a mounting pin for mounting the work deck 21, and 22-1 and 22-2 are mounting pins for the second parallel link 22.

21-1 is a mounting member for the work deck 21;
Reference numeral 24 denotes an interlocking link for the boom that interlocks and connects the rear end mounting portion 7-1 of the turntable 7 and the rear end 15-1 of the second boom 15, and the interlocking link 24 for the boom is swingably mounted. Have been.

Reference numeral 25 denotes a motor mounted on the rear portion of the traveling frame 5, and reference numeral 26 denotes an HST transmission case, which is connected to the drive wheels 2 at a lower portion. 25-1 is a drive pulley on the prime mover 25 side, and 26-1 is a driven pulley on the HST transmission case 26 side.

The prime mover 25 and the HST transmission case 26 are linked by an endless belt 27.

In FIG. 5, reference numeral 30 denotes an outrigger composed of a stowable auxiliary wheel 30-1.
Is connected via a link mechanism 31. Reference numeral 32 denotes an outrigger hydraulic cylinder. When the turntable 7 is turned by the turning hydraulic cylinder 9 and the first boom 13 and the second boom 15 start turning, the outrigger hydraulic cylinder 32 is operated in conjunction therewith. Then, the outrigger 30 is protruded and grounded. 33 is a hydraulic switching valve, 34 is a hydraulic pump, and 35 is a hydraulic oil tank. Reference numeral 36 denotes a battery mounted on the turntable 7.

The auxiliary wheel 30-1 is configured as a spherical rotating body so that the vehicle can easily travel and turn.

The outrigger 30 is automatically protruded and grounded when the turntable 7 rotates and the first boom 13 and the second boom 15 start turning, so that work at high places can be performed safely at all times. Danger prevention is assured.

Further, since the auxiliary wheel 30-1 of the outrigger 30 is a spherical rotating body, the body can run and turn while the outrigger 30 is in contact with the ground, so that work can be performed efficiently. .

The embodiment of the present invention is configured as described above. When carrying out the above-mentioned boom type aerial work vehicle into an orchard and performing aerial work, the vehicle is moved to a predetermined work position by traveling. Then, the lifting hydraulic cylinder 17 is extended.

When the first boom 13 is turned in the upright direction, the link end for the boom 15 holds the rear end of the second boom 15 in a tensioned state. It stands up while rising almost vertically.

The work deck 21 mounted on the tip of the second boom 15 is provided with a first parallel link 20 and a parallel holding member 1.
By the action of 9 and the second parallel link 22, vertical movement is possible while maintaining the horizontal state.

The work deck 21 rises substantially vertically at a certain height. Also, when the second boom 15 is in the maximum standing state, the work deck 21 moves toward the center of the machine to stabilize the machine.

As described above, according to the present invention, the second boom 15
The work deck 21 mounted on the tip of the work can be raised almost vertically at a certain height by the first boom 13 and the second boom 15 and the interlocking link 24 for the boom. Easy, and therefore
High-place work can be performed efficiently.

The work deck 21 moves toward the center of the machine at the highest position, so that when the work deck 21 rises high, the machine is in a stable state.
Therefore, it is possible to prevent the aircraft from tipping over.

Further, since the work deck 21 is located at a position protruding from the traveling device 1, the workability is excellent even when there is an obstacle wall.

In addition, when the first boom 13 and the second boom 15 are lowered, the vehicle height becomes low, and it is easy to travel under branches in an orchard or the like.

[0032]

According to the present invention, the work deck mounted on the tip of the second boom can be raised almost vertically at a certain height by the first boom, the second boom and the link for the boom. The body can be easily positioned in accordance with the location, so that work at high places can be performed efficiently.

Since the working deck moves to the center of the machine at the highest position, the machine is in a stable state when the working deck rises high, and therefore the machine may fall down. Can be prevented.

Further, since the work deck is located at a position protruding from the traveling device, workability is excellent even when there is an obstacle wall.

Moreover, when the first boom and the second boom are lowered, the vehicle height becomes low, and traveling under branches in an orchard or the like is easy.

[Brief description of the drawings]

FIG. 1 is an overall side view of an aerial work vehicle according to the present invention.

FIG. 2 is an overall side view when the boom of the aerial work vehicle is in an upright state.

FIG. 3 is a schematic plan view showing a traveling device of the aerial work vehicle.

FIG. 4 is a partially sectional rear view of the aerial work vehicle;

FIG. 5 is a hydraulic circuit diagram.

[Explanation of symbols]

 7 Turntable 13 1st boom 15 2nd boom 19 Parallel holder 20 1st parallel link 21 Work deck 22 2nd parallel link 24 Interlocking link for boom 24-1 Base 24-2 Upper end

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A01D 46/20 A01D 46/24 B66F 9/06 B66F 11/04

Claims (1)

(57) [Claims] 1. A hydraulic cylinder for raising and lowering a turntable 7 by pivotally supporting a base of a first boom 13 inclined rearward of the body.
A second boom 15 is provided on the upper part of the first boom 13, which is inclined in the forward direction of the fuselage and has a work deck 21 on the upper part thereof via a horizontal support shaft 14. In the aerial work platform, the second boom 15 is connected to the first boom 13
It is configured to be longer, and a parallel holding member 19 is pivotally supported on the horizontal pivot shaft 14, and a parallel movement with respect to the first boom 13 is provided between the parallel holding member 19 and the turntable 7. The first parallel link 20 is provided, and the parallel holding body 19 and the work deck
A second parallel link 22 that moves in parallel with the second boom 15 is provided between the turntable 7 and the turntable 7 and the second boom 15 is linked by a swingable boom interlocking link 24. While the base 24-1 is pivotally supported by the rear of the turntable 7, the upper end 24-2 of the boom interlocking link 24 is interlockingly connected to the second boom 15 at a position rearward of the position where the parallel holder 19 is mounted. A boom type aerial work vehicle, wherein the work deck 21 is configured to be raised almost vertically at a certain height and to be moved closer to the center of the aircraft at an upper position.