KR102263228B1 - High place operation car with dual control system - Google Patents

Abstract

The present invention relates to an orchard vehicle equipped with a dual control system to enable selective operation from each of a driver seat and an upper control unit during work on an aerial work platform. The present invention implements a novel dual control system capable of performing parallel control related to steering control of an aerial work platform, such as performing steering control in a driver seat below while adopting a hydraulic system using an HST pump below during work on the aerial work platform and also performing steering control with a joystick provided on the aerial work platform after conversion into electric signals through a controller on the aerial work platform and a proportional control solenoid valve on a vehicle body. Therefore, the orchard vehicle equipped with the dual control system can improve the efficiency of work using the aerial work platform. The orchard vehicle includes the vehicle body with the driver seat, the aerial work platform with a control panel, and a lifter supporting the aerial work platform.

Description

High place operation car with dual control system

The present invention relates to a work vehicle for fruit trees equipped with a dual control system, and more particularly, to a work vehicle for fruit trees equipped with a dual control system capable of selectively operating from a driver's seat and an upper control unit when working on a high work platform.

A typical fruit tree work vehicle has a loading stand installed at the tip of the boom and is used for transporting goods to high-rise apartments or buildings. In some cases, a basket is installed at the tip of the boom and a worker is loaded onto the basket to get on the street trees, street lights and traffic lights. It is used extensively for maintenance for repairing or repairing power poles, and also for repair work on utility poles.

This orchard work vehicle is a type of mobile crane in which a base frame is installed on a freight vehicle such as a truck, and a rotary table is mounted on the base frame, which has good mobility and can rotate, bend, and expand the rotary table. It is very usefully used for high-altitude work such as external scaffolding work, telecommunication facility temporary construction and maintenance work, bridge inspection and repair work, and external painting work of large ships.

Usually, a working vehicle for fruit trees has a number of booms built-in and a boom assembled in a folding type is installed on the vehicle, and this boom is made to be stretched or contracted in an antenna type, and a workbench for a worker is installed at the top end of the workbench. made of a structure that becomes

That is, since the work car for fruit trees is operated at a high place, it has a structure in which a work table is installed at the tip of the boom that is expanded and contracted on the rotary table so that workers or work items can be safely and conveniently loaded.

In addition, the boom on which the workbench is installed can be extended and contracted, and in the rotary table to which the boom is connected, it is possible to move while raising/lowering and turning left/right of the boom, so that the operator on the workbench performs work at a convenient location. .

However, the existing overwater work vehicle applies a hydraulic system using a general HST (HydroStatic Transmission) pump when working at a high work platform, and operates the high work platform with the joystick of the lower driver's seat. Communication between workers is not smooth, so there are disadvantages such as delay in work time and concern about safety accidents, which lowers work efficiency.

Unexamined Patent Publication No. 10-1993-0000373 Laid-open Patent Publication No. 10-2017-0082853 Laid-open Patent Publication No. 10-2019-0017837 Laid-Open Patent Publication No. 10-2019-0017839

Therefore, the present invention has been devised in consideration of such a point, and it is possible to control steering from the driver's seat below while adopting a hydraulic system using the HST-PUMP at the lower part when working at a high-place workbench, as well as a proportional control solenoid on the body side. By implementing a new dual control system that can perform parallel control related to the steering control of the aerial platform, such as converting it into an electrical signal through the valve and the controller on the aerial platform side, and controlling the steering with the joystick equipped in the aerial platform. , an object of the present invention is to provide an overwater work vehicle equipped with a dual control system that can improve the efficiency of work using an aerial platform.

In addition, another object of the present invention is to reduce the step difference between the main workbench and the auxiliary workbench by implementing a new auxiliary workbench storage method that minimizes the width of the main workbench frame of the aerial workbench and allows the auxiliary workbench to be accommodated in an avoidance space created in the space below the main workbench. In short, it is to provide an overwater work vehicle equipped with a dual control system that can protect the safety of the worker as much as possible, such as preventing the worker's feet from being caught.

In addition, another object of the present invention is to locate the load support section of the auxiliary workbench at the inner end of the auxiliary workbench, and implement a new auxiliary workbench support method that supports up and down using the frame and bearings of the main workbench, thereby providing the auxiliary workbench. It is to provide a work vehicle for fruit trees equipped with a dual control system that can ensure smooth and stable operation of the auxiliary workbench according to the optimization of the load point of the machine.

In order to achieve the above object, an orchard work vehicle equipped with a dual control system provided by the present invention has the following characteristics.

The fruit planting work car equipped with the dual control system is equipped with a driver's seat, a vehicle body that can be driven using caterpillars or wheels, and an operation panel, and is controlled up and down and left and right with an operator on board, as well as fruit harvesting. It has a structure including a high work platform consisting of a main work table and left and right auxiliary work tables, and a lifter supporting the high work platform, while adopting a hydraulic system using the HST-PUMP at the bottom when working at the high work platform, while adopting the driver's seat of the vehicle body In addition to being able to steer control the aerial platform through operation at the aerial platform, it is also converted into an electrical signal through a number of proportional control solenoid valves on the main body side and the controller on the aerial platform side, and then the joystick installed on the operation panel of the aerial platform is operated. It is also characterized by being able to control the steering of the aerial platform.

Here, a pest control device may be mounted on the vehicle body in place of the aerial work platform, and the control unit may be steered and steered using the joystick of the driver's seat through the hydraulic system using the HST-PUMP at the lower part during the operation of the pest control unit.

In a preferred embodiment, a space for accommodating the left and right auxiliary work tables is formed just below the footrest of the main work platform of the aerial work platform, and the left auxiliary work table and the right auxiliary work table are arranged while maintaining the same height on the space part, The left and right auxiliary work tables are installed in a structure that can be stored and withdrawn from the left and right on the same horizontal line while being supported by a plurality of main rollers installed on the main work table, so that the main work table side and the left and right auxiliary work tables are separated from the previous three-layer structure. However, as a two-story structure is achieved, the height difference between the main workbench and the left and right auxiliary workbenches can be minimized.

Here, the left and right auxiliary work tables of the high-place work bench are supported by the auxiliary work table arms and roller brackets extending in the horizontal direction toward the rear end on the lower surface of the left and right auxiliary work tables, and are installed in a structure in rolling contact with the bottom of the frame of the main work table. It may include at least one or more sub-rollers supporting the load of the left and right auxiliary workbenches.

In addition, it is preferable that the sub rollers respectively provided on the left and right auxiliary work tables are arranged in a misalignment with each other and cross each other during storage and withdrawal of the left and right auxiliary work tables to avoid interference with each other.

The working vehicle for fruit trees equipped with the dual control system provided by the present invention has the following effects.

First, when working at an aerial platform, not only can the steering control of the aerial platform be controlled from the driver's seat at the bottom, but also the aerial platform steering control can be performed from the upper platform, so it is possible to directly reflect the active steering behavior of the operator. It has the effect of improving the efficiency of the work used.

Second, by reducing the step difference between the main workbench and the auxiliary workbench by optimally designing the storage space of the auxiliary workbench formed in the space under the main workbench of the high-place workbench, it is possible to reduce the compression accident in which a part of the body such as the worker's feet is caught, There is an effect of maximally protecting the safety of workers, such as reducing various accidents that may occur when moving between the main workbench and the auxiliary workbench.

Third, by locating the load support section of the auxiliary workbench at the inner end of the auxiliary workbench and applying a new auxiliary workbench support method that supports the auxiliary workbench up and down using bearings in contact with the frame of the main workbench, It has the effect of securing the smooth and stable operation of the auxiliary workbench according to the optimization of the load point.

1 is a perspective view showing a working vehicle for fruit trees equipped with a dual control system according to an embodiment of the present invention;
2 is a photograph showing an operation panel, a proportional control solenoid valve, and a controller of an overwater work vehicle equipped with a dual control system according to an embodiment of the present invention;
3 is a circuit diagram of an orchard working vehicle equipped with a dual control system according to an embodiment of the present invention;
4 to 7 are schematic diagrams of an orchard work vehicle equipped with a dual control system according to an embodiment of the present invention;
8 is a perspective view showing a state in which a pest control device is mounted instead of a high work platform in an orchard work vehicle equipped with a dual control system according to an embodiment of the present invention;
9 to 14 are perspective views showing a high-place workbench in an orchard work vehicle equipped with a dual control system according to an embodiment of the present invention;

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a working vehicle for fruit trees equipped with a dual control system according to an embodiment of the present invention, and FIG. 2 is a control panel and proportional control of the working vehicle for fruit trees equipped with a dual control system according to an embodiment of the present invention. It is a picture showing the solenoid valve and controller.

As shown in FIGS. 1 and 2 , the fruit-bearing work vehicle is a vehicle body 10 that can be driven using caterpillars or wheels, and an operator rides on it to control up and down and left and right running, as well as to perform work such as fruit harvesting. It rotates the entire lifter 16 including the high-place work platform 15, the lifter 16 supporting the high-place work platform 15, and the high-place work platform 15 by 90° left and right within a total of 180°. It includes a constant speed turning device (not shown) and the like.

Here, the vehicle body 11 is equipped with a driver's seat 10, and the driver riding in the driver's seat 10 operates the joystick 19b installed on one side of the driver's seat to control the vehicle body's running as well as the high-altitude workbench 15. steering control becomes possible.

In particular, the working vehicle for overwatering can selectively steer and control the aerial platform 15 by a driver riding on the driver's seat 10 or by a worker riding on the aerial platform 15, and also controls the vehicle body 11 to run. It is equipped with a dual control system capable of parallel control.

That is, a general overwater work vehicle is a hydraulic system using a conventional HST-PUMP and uses the joystick 19b in the driver's seat 10 of the vehicle body 11 to steer and control the aerial work platform 15, but provided in the present invention The overwater work car can steer and control the aerial work platform 15 from the driver's seat 10 of the vehicle body 11 while adopting a hydraulic system using the HST-PUMP at the bottom when working at the high work platform, and also the high work platform 15. It is possible to control the steering of the aerial platform 15 even in a state of being on board, and it is possible to control the driving of the vehicle body 11 while riding on the aerial platform 15 .

To this end, a plurality of proportional control solenoid valves 17 are installed on the vehicle body 11 side, and the proportional control solenoid valve 17 installed in this way is electrically connected to the controller 18 side installed on the high work platform 15 side. In addition to being connected to the proportional control solenoid valve 17 at this time, the operation can be controlled by the controller 18 .

In addition, the operation panel 12 is installed on the aerial platform 18, and the operation panel 12 at this time has an emergency switch 28, a power switch 29, a horn switch 30, an emergency lowering switch 31, and a starter. Switch (32), up/down switch (33), work light switch (34), choke switch (35), auxiliary work platform extension switches (36a, 36b), etc. as well as a joystick for steering operation of the aerial platform (15) 19a) is provided, and each switch and joystick 19a of the operation panel 12 are electrically connected to the controller 18 located below the operation panel 12 .

Therefore, after converting the hydraulic system using the HST-PUMP on the lower part into an electrical signal through the proportional control solenoid valve 17 and the controller 18 when working at the high work platform, it is installed on the operation panel 12 on the high work platform 15. Through manipulation of the joystick 19a, not only steering control of the aerial platform 15 but also driving control of the vehicle body 11 can be performed .

Looking at this in more detail, FIG. 3 is a circuit diagram of an orchard working vehicle equipped with a dual control system according to an embodiment of the present invention, and FIGS. 4 to 7 are for an orchard with a dual control system according to an embodiment of the present invention. It is a schematic diagram of the work vehicle.

Here, reference numeral 17 is a proportional control solenoid valve, 19a and 19b are a joystick, 38 is a main shuttle block, 39 is an HST pump, 40 is a lift cylinder, 41 is a solenoid valve, 42 is a shuttle block, 43 is a hydraulic motor, 44 is a hydraulic pressure Each tank is indicated.

As shown in FIGS. 3 to 7, the joystick 19a of the operation panel 12 on the main workbench 13, that is, the electric joystick, is operated in a forward (↑) or backward (↓) direction when working on a high-place workbench. Then, the electric signal is transmitted to the controller 18, the controller 18 at this time opens the forward port or the reverse port of the proportional control solenoid valve (17).

Accordingly, the vehicle moves forward or backward by the hydraulic pressure moving the hydraulic motors 43a and 43b forward or backward through the forward port and the reverse port of the HST pump 39 .

And, when the joystick 19a is operated in the left (←) or right (→) direction even when changing the direction, an electric signal is transmitted to the controller 18, and the controller 18 at this time controls the proportional control solenoid valve 17 ) will open the left turn port or right turn port.

Accordingly, the vehicle is rotated left or right by turning the hydraulic motors 43a and 43b left and right through the left rotation port and the right rotation port of the HST pump 39 .

8 is a perspective view illustrating a state in which a pest control device is mounted instead of a high work platform in an orchard work vehicle equipped with a dual control system according to an embodiment of the present invention.

As shown in FIG. 8 , here it shows a state in which the control device 20 is mounted on the vehicle body 11 in place of the high-altitude work platform 15 .

That is, it is possible to remove the aerial work platform 15 from the vehicle body 11 and mount the pest control device 20 in its place, and the joystick of the driver's seat 10 through the hydraulic system using the HST-PUMP at the lower part during the pest control operation. By using (19b), it is possible to control the steering control of the control device 20 as well as driving the vehicle.

For example, it is possible to drive and steer the control device 20 using the joystick 19b of the driver's seat 10 , that is, a hydraulic joystick.

By applying the driving and steering system using the dual control system to the working vehicle for overwatering in this way, the joystick 19b is pushed in the forward direction (↑) from the driver's seat 10 of the vehicle body 11 during the control system operation, the joystick 19b ) The hydraulic pressure from the lower forward port (forward RH, forward LH) is transferred to the forward port (forward RH, forward LH) of the HST pump 39 through the main shuttle block 38, and again to the left and right hydraulic motors ( The hydraulic pressure is transmitted to the forward ports of 43a and 43b) to move the vehicle forward.

In the case of reverse, if the joystick 19b is pushed in the reverse direction (↓), it passes through the reverse port (reverse RH, reverse LH) under the joystick 19b again through the main shuttle block 38 and the reverse port of the HST pump 39 (reverse RH, reverse LH), and then the hydraulic pressure is transferred to the reverse ports of the hydraulic motors 43a and 43b on the left and right, so that the vehicle moves backward .

When turning left, if the joystick (19b) is pushed in the left direction (←), the forward port (forward RH) and reverse port (reverse LH) under the joystick 19b are opened, and the HST pump (39) goes through the main shuttle block (38). is transmitted to the forward port (forward RH) and backward port (reverse LH) of the hydraulic motor 43b on the right side to move forward, and the hydraulic motor 43a on the left side to move backward, causing the vehicle to turn left.

When turning right, if the joystick (19b) is pushed in the right direction (→), the reverse port (reverse RH) and forward port (forward LH) under the joystick (19b) are opened, and the HST pump (39) goes through the main shuttle block (38). is transmitted to the reverse port (reverse RH) and forward port (forward LH) of the hydraulic motor 43b on the right side, and the hydraulic motor 43a on the left side moves forward, causing the vehicle to turn right .

By applying the steering system using the dual control system to the working vehicle for overwatering in this way, parallel control that can be operated from the driver's seat 10 of the vehicle body 11 when working with a pest control system and on the high working platform 15 when working with a high work platform In the end, it can be used as a pest control at the control period through the conversion of equipment used using the detachable structure of the pest control device 20 and the high work platform 15, as well as the advantage of being able to use it as a high work table at the harvest time. have.

9 to 14 are perspective views illustrating a high-altitude workbench in an overwater work vehicle equipped with a dual control system according to an embodiment of the present invention.

As shown in FIGS. 9 to 14 , the high-altitude work platform 15 is a space for a worker to board, and is controlled up and down and left and right, and has a structure capable of performing work such as fruit harvesting.

The high-altitude workbench 15 includes a main workbench 13 including a frame 26 in the form of a square plate and a footrest 21 covering the upper surface of the frame 26, and the left and right sides of the main workbench 13 at this time. It is composed of a left auxiliary workbench 14a and a right auxiliary workbench 14b that can be accommodated and withdrawn while being slide-coupled to both sides.

In addition, an operation panel 12 is installed on one side of the main work surface 13 of the high-place work surface 15 at a height of about the worker's waist, and a controller 18 of a dual control system is installed at the lower portion of the operation panel 12 installed in this way. is installed

Accordingly, when the auxiliary work table extension switches 36a and 36b on the operation panel 12 are operated, the left and right auxiliary work tables 14a and 14b housed in the bottom of the main work table 13 are operated by known actuators (not shown). ), the entire working space can be expanded, and the left and right auxiliary work tables 14a and 14b can be accommodated again through the operation of the auxiliary work bench extension switches 36a and 36b. there will be

In particular, a space 22 for accommodating the left and right auxiliary work tables 14a and 14b is formed just below the footrest 21 on the main work surface 13 of the high-place work platform 15, and the space formed in this way Within 22, the left auxiliary workbench 14a and the right auxiliary workbench 14b can be arranged while maintaining the same height.

That is, the left auxiliary workbench 14a and the right auxiliary workbench 14b take a horizontal posture at the same height and are arranged up and down in parallel with the frame 26 and the footrest 21 at the bottom of the space 22. layer structure can be achieved.

In this way, the height difference between the main workbench 13 and the left and right auxiliary workbenches 14a and 14b can be minimized according to the two-layer structure of the main workbench 13 side and the left and right auxiliary workbenches 14a and 14b, and eventually the operator When moving between the workbench and the auxiliary workbench, it is possible to reduce the number of accidents that may occur due to being caught in the jaws, thereby preventing safety accidents for workers.

As an example, in the past, the left and right auxiliary work tables were manufactured in a three-layer structure under the main work table, so that the height difference between the main work table and the auxiliary work table was formed as high as about 40 to 85 mm, and the worker frequently trips here. However, in the present invention, by applying a structure in which the minimum section that can avoid interference when the auxiliary workbench is stored in the space under the main workbench by minimizing the width of the main workbench frame, the main workbench and the auxiliary workbench are applied. The height difference between the workbenches can be minimized to about 16mm, and consequently, accidents that can occur when moving between the main workbench and the auxiliary workbench can be reduced, such as reducing the compression accident in which parts of the body such as the worker's feet are caught.

The left and right auxiliary work tables 14a and 14b are installed in a slidable structure while being supported by a plurality of main rollers 23 installed on the main work table 13 .

To this end, a plurality of freely rotatable main rollers 23 are installed at the left and right ends of the main work table 13 , and the main rollers 23 installed in this way are spaced at predetermined intervals along the front and rear direction of the frame of the main work table 13 . It serves to support the bottom surface of the left and right auxiliary work tables 14a and 14b that are stored and drawn out in a slide type while maintaining the .

For example, the main roller 23 is formed to protrude from the bottom surface of the left and right auxiliary work tables 14a and 14b so that it can support the left and right auxiliary work tables 14a and 14b while in contact with the bottom surface of the auxiliary work table arm 24. .

At this time, the auxiliary workbench arms 24 formed on the left and right auxiliary workbenches 14a and 14b have a length that extends further to the rear than the rear ends of the left and right auxiliary workbenches 14a and 14b, and as a result, the left and right auxiliary workbenches When the 14a and 14b are completely accommodated in the space 22 below the main work table 13, the end of the auxiliary work table arm 24 at this time, for example, the end at which the sub roller 27 is installed. can be located at the left and right ends of the main work table 13 (eg, the end of the sub work table arm of the left sub work table is the right end of the main work table, and the end of the sub work table arm of the right sub work table is the left end of the main work table) .

In particular, in order to optimize the load points of the left and right auxiliary work tables 14a and 14b, the left and right auxiliary work tables 14a and 14b include at least one or more sub rollers 27 .

To this end, at the bottom of the left and right auxiliary work benches (14a, 14b), at least two or more rows of parallel auxiliary workbenches extending horizontally toward the rear end of the auxiliary workbench while being arranged at regular intervals along the width direction of the auxiliary workbench in parallel along the front and rear directions of the auxiliary workbench A work table arm 24 is formed, and a sub roller 27 supported by a roller bracket 25 is installed at an end of each auxiliary work table arm 24 thus formed.

At this time, the sub roller 27 can make rolling contact with the frame 26 of the main workbench 13 , that is, the lower face of the frame 26 arranged in parallel with the lower face of the auxiliary workbench arm 24 .

In addition, the sub rollers 27 provided on the left auxiliary work bench 14a and the right auxiliary work bench 14b, respectively, are misaligned with each other along the width direction of the auxiliary work bench, and when storing and withdrawing the left and right auxiliary work tables 14a and 14b Interference with each other can be avoided by intersecting with each other.

That is, when the left and right auxiliary work tables 14a and 14b are received and taken out, the sub rollers 27a of the left auxiliary work table 14a and the sub rollers 27b of the right auxiliary work tables 14b pass each other while passing each other. It is possible to roll from one end of the main work table 13 to the other end.

In addition, a stopper 37 is installed on the frame 26 of the main workbench 13, and the stopper 37 at this time restricts the progress of the sub-roller 27 while limiting the left and right auxiliary workbenches 14a and 14b. It plays a role in regulating the withdrawal location.

Accordingly, when the left and right auxiliary work tables 14a and 14b are drawn out to the maximum, the sub roller 27 moves to a predetermined point on the bottom surface of the frame 26 of the main work table 13, for example, the main work table 13. It is possible to exert an appropriate bearing force against the load applied from top to bottom on the left and right auxiliary work tables 14a and 14b while in contact with the bottom of the frame 26, which is about the middle of the inner section of the .

By locating the load support section of the auxiliary workbench at the inner end of the auxiliary workbench and applying a structure that supports up and down using the frame and sub rollers of the main workbench, the load supporting section of the auxiliary workbench is optimized to make the auxiliary workbench more smoothly. and stable storage and withdrawal operations can be secured, and the worker can work safely and stably, such as being able to maintain a solid support state of the auxiliary workbench even when pulling out the auxiliary workbench and stepping on it.

As described above, the present invention adopts a hydraulic system and a dual control system using HST-PUMP, so that steering control can be performed from the driver's seat below, as well as an electrical signal through a proportional control solenoid valve on the body side and a controller on the high work platform side. By providing a new steering system that enables parallel control in relation to the steering control of the aerial workbench as well as the control system at the height of the platform, such as steering control with the joystick equipped on the aerial platform, the efficiency of work using the aerial platform can be improved. It can be improved, and it is possible to change the use of a pesticide and an aerial workbench during control or harvesting, thereby increasing the utilization of equipment.

10: driver's seat
11: vehicle body
12: operation panel
13 : main workbench
14a, 14b: auxiliary workbench
15: aerial work platform
16 : lifter
17: proportional control solenoid valve
18: controller
19a, 19b : Joystick
20: control device
21 : scaffold
22: space part
23 : main roller
24: auxiliary work table arm
25 : roller bracket
26 : frame
27: sub roller
28: emergency switch
29: power switch
30: horn switch
31: emergency lowering switch
32: start switch
33: up / down switch
34: work light switch
35: choke switch
36a, 36b : auxiliary workbench extension switch
37: stopper
38 : Main Shuttle Block
39: HST pump
40: lift cylinder
41: solenoid valve
42 : Shuttle Block
43a, 43b: hydraulic motor
44: hydraulic tank

Claims (5)

It is equipped with a driver's seat 10, a vehicle body 11 that can be driven using caterpillars or wheels, and an operation panel 12, and an operator is boarded and controlled vertically and horizontally, as well as fruit harvesting. and a high work platform (15) comprising a main work table (13) and left and right auxiliary work tables (14a, 14b), and a lifter (16) supporting the aerial work platform (15),
By adopting a hydraulic system using the HST-PUMP at the bottom when working on the high platform, it is possible to steer and control the high platform 15 through operation from the driver's seat 10 of the vehicle body 11, as well as a number of After conversion into an electrical signal through the proportional control solenoid valve 17 and the controller 18 on the aerial platform side, the aerial platform 15 is also operated through the operation of the joystick 19a installed on the operation panel 12 of the aerial platform 15. ) to be able to control the steering,
A space 22 for accommodating the left and right auxiliary work tables 14a and 14b is formed just below the footrest 21 on the main work surface 13 of the high work platform 15, and on the space 22, the left The auxiliary work table 14a and the right auxiliary work table 14b are arranged while maintaining the same height, and the left and right auxiliary work tables 14a and 14b are formed by a plurality of main rollers 23 installed on the main work table 13. It is installed in a structure that can be stored and withdrawn from side to side on the same horizontal line while being supported,
The lower surface of the left and right auxiliary work tables 14a and 14b are supported by the auxiliary work table arms 24 and roller brackets 25 extending in the horizontal direction toward the rear end, and the frame 26 of the main work table 13. It includes at least one sub-roller 27 that supports the load of the left and right auxiliary work tables 14a and 14b while being installed in a structure in rolling contact with the bottom surface,
The sub rollers 27 provided on the left auxiliary workbench 14a and the right auxiliary workbench 14b, respectively, are misaligned with each other and intersect each other when receiving and withdrawing the left and right auxiliary workbenches 14a and 14b to prevent interference with each other. However, when the left and right auxiliary work tables 14a and 14b are stored and taken out, the sub rollers 27a of the left auxiliary work table 14a and the sub rollers 27b of the right auxiliary work tables 14b are A fruit tree with a dual control system, characterized in that it can roll from one end to the other end of the main work table (13) while passing each other.
The method according to claim 1,
A pest control device 20 may be mounted on the vehicle body 11 in place of the aerial work platform 15, and the joystick 19b of the driver's seat 10 is used through the hydraulic system using the HST-PUMP at the lower part during the control operation. A work car for fruit trees equipped with a dual control system, characterized in that it is possible to steer and control the control device 20 by doing so.
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