JPH04267811A - Boom-type high-ground working vehicle - Google Patents

Abstract

PURPOSE:To provide the title working vehicle designed to lift a working deck nearly vertically and ensure said deck to be moved toward the center of the machine body at the upper end. CONSTITUTION:The objective working vehicle designed to lift a working deck nearly vertically through the first and second booms and an interlocking link for the booms and ensure said deck to be moved toward the center of the machine body at the upper end.

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 in orchards and various outdoor construction works.

0002

[Prior Art] Conventionally, in an aerial work vehicle, an upper boom having a working deck is connected to the upper end of a lower boom that can be raised and lowered freely by a hydraulic cylinder, and the upper boom is raised and lowered by another hydraulic cylinder. There are some that move, and others that have a working deck connected to the upper end of a main boom that can be extended and retracted using a hydraulic system.

However, in all of the boom-type aerial work vehicles mentioned above, the work deck cannot be vertically moved up and down. Therefore, in recent years, there are aerial work vehicles in which a pantograph-like lifting device is provided on a traveling platform and a working deck is placed on the top of the lifting device.

0004

[Problem to be solved by the invention] However, in this case,
Since the traveling trolley part is configured to be wider than the working deck part, for example, when working on the side wall of a building, the working deck part cannot be brought close to the side wall. This method has problems such as the work area is restricted in various ways and the elevating device is complicated.

[0005]

[Means for Solving the Problems] The present invention has the base of a first boom that is tilted toward the rear of the aircraft body pivotably mounted on a turntable so that it can be raised and lowered freely by a hydraulic cylinder for raising and lowering.
In a boom-type aerial work vehicle, in which a second boom, which is inclined toward the front of the machine and has a working deck at the top, is connected to the upper part of the boom via a horizontal support shaft, the second boom is connected to the first boom. The first boom is configured to be longer than the boom, and a parallel support body is pivotally supported on the horizontal pivot shaft, and between the parallel support body and the turntable 7 there is a first boom that moves parallel to the first boom. In addition to providing a parallel link, a second parallel link that moves parallel to the second boom is provided between the parallel holding body and the working deck, and furthermore, the turntable 7 and the second boom can be rocked. The boom interlocking link has its base pivoted to the rear of the turntable, and its upper end connected to the second link at a position rearward from the parallel support body mounting position.
It is an object of the present invention to provide a boom-type aerial work vehicle, characterized in that the above-mentioned working deck is connected to the boom and raised almost vertically up to a certain height, and is moved toward the center of the machine at the upper position. It is something to do.

[0006]

[Operation] When using the boom-type aerial work vehicle in an orchard or the like, the machine is moved to a predetermined work position and the lifting hydraulic cylinder is extended.

[0007] Then, the first boom rotates upward and operates in an upright state, and along with this, the boom interlocking link holds the rear end of the second boom in a tensioned state. The tip of the holder is in an upright state while rising upward substantially vertically.

[0008] The working deck can be raised and lowered almost vertically up to a certain height while maintaining a horizontal state through the actions of the first parallel link, the parallel holding body, and the second parallel link.

Furthermore, when the second boom is raised to its maximum position and the working deck is at its highest position, the working deck moves toward the center of the machine to stabilize the machine.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments shown in the accompanying drawings.

FIGS. 1 and 2 show side views of a boom type aerial work vehicle according to the present invention. 1 in the figure is a traveling device of a boom type aerial work vehicle A, in which endless footwear 4 is rotatably wrapped around a driving wheel 2 and a driven wheel 3. Reference numeral 5 denotes a traveling frame, in which a swing bearing portion 6 is vertically provided in the center portion. Reference numeral 7 denotes a turntable placed on the rotary bearing section 6, and a boom bracket 8 having a triangular side surface shape is protruded from the upper part.

Reference numeral 9 denotes a swinging hydraulic cylinder provided between the base mounting pin 10 on the traveling frame 5 side and the mounting pin 11 protruding from the lower side of the turntable 7. The tenet table 7 can be freely rotated by the telescopic operation of the numeral 9.

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

A first boom 13 has a base 13-1 pivotally supported on the boom bracket 8, and a second boom 15 is connected to an upper end 13-2 via a horizontal pivot shaft 14. 16
connects the base 13-1 of the first boom 13 to the boom bracket 8.
It is a mounting shaft that pivots on the 17 is a lifting hydraulic cylinder provided between the turntable 7 and the upper part of the first boom 13, and the lifting hydraulic cylinder 17 lifts the first boom 13.
It can rise and fall freely. 18 is a lifting hydraulic cylinder 17
This is the mounting pin for attaching.

Reference numeral 19 denotes a triangular parallel support body pivotally supported on the horizontal support shaft 14, and between the lower end 19-1 of the parallel support body 19 and the turntable 7, there is a A first parallel link 20 that moves parallel to the first boom 13 is provided in a spanning manner. 20-1 and 20-2 are mounting pins of the first parallel link 20.

Reference numeral 21 denotes a working deck connected to the upper end of the second boom 15, and between the working deck 21 and the upper end 19-2 of the parallel support body 19, there is provided a working deck that moves parallel to the second boom 15. A second parallel link 22 is provided in a spanning manner. 23 is a mounting pin for attaching the working deck 21; 22
-1 and 22-2 are attachment pins of the second parallel link 22.

Further, 21-1 is a mounting member for the working deck 21, and 24 is a rear end mounting portion 7-1 of the turntable 7.
This is a boom interlocking link that interlocks and connects the rear end portion 15-1 of the second boom 15, and the boom interlocking link 24 is swingably attached.

Further, 25 is a prime mover mounted on the rear part of the running frame 5, and 26 is an HST transmission case, which is connected to the drive wheel 2 at the lower part. 25-1 is the drive pulley on the prime mover 25 side, 26-1 is the HST mission case 26
This is the driven pulley on the side.

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

Further, in FIG. 5, reference numeral 30 denotes an outrigger composed of a retractable auxiliary wheel 30-1, which is connected to the front part of the traveling frame 5 via a link mechanism 31. 32 is a hydraulic cylinder for outriggers, and when the turntable 7 is rotated by the hydraulic cylinder 9 for swinging and the first boom 13 and second boom 15 begin to swing, the hydraulic cylinder 32 for outriggers is operated in conjunction with this. Then, the outrigger 30 is projected and grounded. Note that 33 is a hydraulic switching valve, 34 is a hydraulic pump, and 35 is a hydraulic oil tank. Further, 36 is a battery placed on the turntable 7.

The above-mentioned auxiliary wheels 30-1 are configured as spherical rotating bodies, thereby making it easier for the aircraft to travel and turn.

The outrigger 30 is connected to the first boom 13 and the second boom 1 by the rotation of the turntable 7.
When the robot 5 starts turning, it automatically protrudes and touches the ground, so work at heights can be performed safely at all times and dangers are definitely prevented.

[0023] Also, the auxiliary wheel 30- of the outrigger 30
By making 1 a spherical rotating body, the machine can run and turn with the outriggers 30 in contact with the ground, and work can be carried out efficiently.

The embodiment of the present invention is constructed as described above, and when carrying the boom-type aerial work vehicle into an orchard to perform high-altitude work, the vehicle must be moved to a predetermined work position. Then, the lifting hydraulic cylinder 17 is extended.

When the first boom 13 is rotated in the upright direction, the boom interlocking link 24 holds the rear end of the second boom 15 in tension, so that the tip end of the second boom 15 moves upward. It rises almost vertically to a standing state.

Further, the working deck 21 attached to the tip of the second boom 15 can be moved up and down while maintaining a horizontal state by the action of the first parallel link 20, the parallel holding body 19, and the second parallel link 22. be.

The working deck 21 rises almost vertically until it reaches a certain height. Furthermore, when the second boom 15 is in its maximum upright position, the working deck 21 moves toward the center of the machine to stabilize the machine.

As described above, according to the present invention, the second boom 1
The work deck 21 attached to the tip of the first boom 1
3 and the second boom 15 and the boom interlocking link 24, the machine can be raised almost vertically to a certain height, making it easy to position the machine according to the work area, and therefore work at heights efficiently. It is something that can be done.

Furthermore, since the working deck 21 moves toward the center of the aircraft at its highest position, when the working deck 21 rises high, the aircraft will be in a stable state, and therefore the aircraft will not fall. This is something that can be prevented from happening.

Furthermore, since the working deck 21 is located in a protruding position with respect to the traveling device 1, the workability is excellent even when there is an obstacle wall.

[0031] Moreover, the first boom 13 and the second boom 1
When the vehicle is lowered, the vehicle height becomes lower, making it easier to drive under branches in orchards, etc.

[0032]

[Effects of the Invention] In the present invention, the working deck attached to the tip of the second boom can be raised almost vertically to a certain height by the first boom, the second boom, and the boom interlocking link. The machine body can be easily positioned according to the location, and therefore work at heights can be performed efficiently.

[0033] Furthermore, since the working deck moves towards the center of the aircraft at its highest position, when the working deck is raised high, the aircraft will be in a stable state, thus preventing the aircraft from tipping over. can be prevented.

Furthermore, since the working deck is located in a protruding position relative to the traveling device, the workability is excellent even when there is an obstacle wall.

Moreover, when the first and second booms are lowered, the vehicle height becomes lower, making it easier to drive under branches in orchards and the like.

[Brief explanation of the drawing]

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

FIG. 2 is an overall side view of the aerial work vehicle when the boom 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] The hydraulic circuit diagram.

[Explanation of symbols]

7 Turntable 13 First boom 15 Second boom 19 Parallel holding body 20 First parallel link 21 Work deck 22 Second parallel link 24 Interlocking link for boom 24-1 Base 24-2 Upper end

Claims (1)

[Claims] Claim 1: The base of a first boom 13 tilting toward the rear of the machine is pivoted on a turntable 7 so that it can be raised and lowered freely by a lifting hydraulic cylinder 17. Work deck 2 on top tilted in direction
In a boom-type aerial work vehicle in which a second boom 15 including a second boom 15 and a second boom 15 are connected via a horizontal pivot shaft 14, the second boom 15
is configured to be longer than the first boom 13, and a parallel support body 19 is pivotally supported on the horizontal pivot shaft 14, so that the parallel support body 1
A first parallel link 20 that moves parallel to the first boom 13 is provided between the turntable 9 and the turntable 7;
A second parallel link 22 that moves parallel to the second boom 15 is provided between the parallel support body 19 and the working deck 21, and further allows the turntable 7 and the second boom 15 to swing. They are connected by a boom interlocking link 24, and the boom interlocking link 24 has a base 24-1 pivotally supported on the rear of the turntable 7, and an upper end 24-2 located at a rear position relative to the mounting position of the parallel support body 19. A boom-type aerial work vehicle characterized in that the working deck 21 is connected in conjunction with the second boom 15 to raise the working deck 21 almost vertically to a certain height and move it toward the center of the machine at the upper position. .