JP2002096996A - Highlift working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively wire connecting cable, and to prevent the connecting cable from accidentally being cut and damaged due to rise and fall of a workbench that makes the connecting cable dangle and pulls the connecting cable. SOLUTION: In this highlift working vehicle, the workbench capable of rising and falling is provided on a vehicle body, the workbench is raised and lowered through a rise and fall strip element, and a tool to be operated provided on the vehicle body side is operated by an operating tool provided on the workbench side. The connecting cable for connecting the operating tool side and the tool to be operated side is held along the rise and fall strip element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial work vehicle used in, for example, an orchard.

[0002]

2. Description of the Related Art Conventionally, an aerial work vehicle that performs work at a high place is provided with a worktable that can be raised and lowered on a vehicle body, and the worktable is raised and lowered via a lifting chain wound around a sprocket. There is an operating tool provided on the workbench side that operates an operated tool provided on the vehicle body side via a connection cable. In this type of conventional aerial work vehicle, the operating tool on the worktable side is used. Since the operating tool and the operated tool on the vehicle body move relative to each other by elevating and lowering the work table, how to arrange a connection cable for connecting the operating tool and the operated tool becomes a problem.

[0003] In this case, there is a method in which a dedicated chain having a storage function of a connection cable is used as an elevating chain for raising and lowering the work table, the connection cable is stored in the dedicated chain, and the connection cable is wired. Further, a connection cable for connecting the operation tool side and the operated tool side is hooked on a sprocket around which an elevating chain is wound, and the connection cable is placed between the operation tool side and the operated tool side. There is a method of wiring.

[0004]

However, in the method of storing the connection cables in the dedicated chain and wiring the connection cables, there is a problem that the dedicated chain is expensive and the manufacturing cost is high. Further, in the case of a method in which the connection cable is hooked on a sprocket around which the elevating chain is wound, and the connection cable is wired between the operation tool side and the operated tool side, the connection cable cannot be held in the middle. There is a possibility that the connection cable is cut or damaged due to the connection cable fluctuating or being pulled by the raising and lowering operation of the work table.

SUMMARY OF THE INVENTION In view of the above problems, the present invention allows connection cables to be routed at low cost, and the connection cables are unexpectedly cut or damaged due to the connection cables fluctuating or being pulled when the workbench is raised or lowered. It is possible to prevent it from being done.

[0006]

The technical means of the present invention for solving the above-mentioned problems is to provide a worktable 11 which can be moved up and down on a vehicle body 2 and to move the worktable 11 up and down through a lifting cable.
In an aerial work vehicle in which an operating tool provided on the vehicle body 2 is operated by an operating tool provided on the workbench 11 side, a connecting cable for connecting the operating tool side and the operated tool side is connected to a lifting cable. The point is that the connection cable is connected to the lifting cable at a plurality of locations at intervals so as to be held along the body.

Another technical means of the present invention is that the operated device is constituted by an electric device electrically operated by the operating device, and the connection cable electrically connects the operating device side and the operated device side. And an electric cable 61 or an electric harness. Other technical means of the present invention include:
The operating tool is configured by a device that is mechanically operated by the operating tool, and the connection cable is configured by a push-pull cable or a wire that interlocks and connects the operating tool side and the operated tool side. . Another technical means of the present invention is a push-pull cable, wherein the operated device is configured by a device mechanically operated by the operating device, and the connection cable interlocks and connects the operating device side and the operated device side. Or it is constituted by a wire.

[0008] Another technical means of the present invention is that the elevating rope is a hoisting chain 3 wound around a sprocket 29.
5, a plurality of attachment pieces 63 are protruded from the link 35a of the elevating chain 35 at intervals, and a plurality of connecting members 65 holding the electric cable 61 are attached to the attachment pieces 63 at intervals. It is in the point. Another technical means of the present invention is that the elevating rope body is constituted by an elevating chain 35 wound around a sprocket 29, and a plurality of mounting pieces 63 project from a link 35a of the elevating chain 35 at intervals. In addition, a plurality of connecting members 65 for holding the electric cable 61 are attached to the attachment piece 63 at intervals.

Another technical means of the present invention is that the work table 11 is moved up and down via the elevating chain 35 by moving the sprocket 29 up and down.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 5 to 8, reference numeral 1 denotes an aerial work vehicle. The aerial work vehicle 1 includes a pair of left and right front wheels 5.
L, 5R (drive wheels) and one rear wheel 6 (wheel) have a vehicle body 2 supported so as to be able to run. This car body 2
As shown in FIG. 9, it has a pair of left and right main frame members 3. The left and right main frame members 3 have a wide left-right space on the front part 3a side and a rear part 3b.
The left-right gap is narrower, and the middle part 3c is formed so that the left-right gap gradually narrows toward the rear, and is formed to be one step higher on the rear part 3b side.

A support bracket 4 is provided on the front end side of each of the left and right main frame members 3, and front wheels 5L and 5R are supported by the support bracket 4 so as to be rotatable around a left-right axis. The raised portions on the rear portion 3b side of the left and right main frame members 3 are connected by a left-right support member 7, and a support bracket 8 is attached to the left-right central portion of the support member 7. A rear wheel 6 is rotatably supported on the left and right directions around an axis in the left-right direction.

The support bracket 8 is attached to the support member 7 so as to be rotatable around a vertical axis, and the rear wheel 6 is a caster wheel. The rear side of the front part 3a of the left and right main frame members 3 and the middle part in the front-rear direction of the intermediate part 3c are connected by a pair of front and rear connection members 9,10. A worktable 11 in the form of a bucket on which a worker can ride is provided on the vehicle body 2.
A lifting device 12 for raising and lowering the work table 11, motors 13L and 13R for driving the left and right front wheels 5L and 5R,
Two batteries 14 serving as power supplies for electric equipment mounted on the aerial work vehicle 1, a hydraulic pump 15 for driving the lifting / lowering device 12, and an alternator 1 for charging the battery 14
6 and an engine 17 for driving the hydraulic pump 15 and the alternator 16 are provided.

The battery 14 is mounted via a mounting plate on a connecting member 10 for connecting the middle part 3c of the left and right main frame members 3 to the middle part in the front-rear direction.
The hydraulic pump 15 and the alternator 16 are arranged side by side on the rear side of the battery 14 and mounted on a support 55 provided on the vehicle body 2. Further, the hydraulic pump 15 and the alternator 16 are linked to an output shaft of the engine 17 via a winding transmission mechanism 56. The work table 11 is disposed at a substantially central portion between the left and right front wheels 5L and 5R, and can be moved up and down in a substantially linear manner in a vertical direction (vertical direction) by an elevating device 12.

Accordingly, the work platform 11 is moved below the target position by moving the aerial work vehicle 1 in a state where the work table 11 is at the lowermost position, and the work table 11 is moved by the elevating device 12.
, The position can be accurately positioned at the target position, and there is no need to move and correct the position of the vehicle body 2, thereby improving workability. In addition, since the position of the center of gravity in the horizontal direction does not change even when the work table 11 is moved up and down, the stability is good. The work table 11 includes left and right front wheels 5L and 5R.
Since it is located at the approximate center of the center and at a position close to the turning center or the turning center, the worker is not swung at the time of turning, and can turn at a relatively high speed.

The workbench 11 is provided with a guard 24. The guard 24 is provided at a lower rear pivot portion 24a.
Are supported by the worktable 11 via a bracket (not shown) so as to be rotatable around the left-right axis, and the front part of the guard 24 is provided on supports 25 provided on the left and right sides of the front part of the worktable 11. It is placed on. Further, a control box 36 is provided on the workbench 11, and the control box 36 has a controller (control device) for controlling electric devices mounted on the aerial work vehicle 1, as shown in FIGS. ) 48 is incorporated,
A lift elevating switch 37 for remotely operating the elevating device 12,
A speed changeover switch 42 for switching the maximum traveling speed, a joystick lever 43 for steering, a key switch 44 for starting the engine 17, a charge lamp 45, an overload indicator 50, an alarm buzzer 49 and the like are provided.

The elevating device 12 is arranged on the rear side of the worktable 11 and is a connecting member 9 for connecting the front portions 3a of the left and right main frame members 3.
Is erected on a support plate 18 fixed at the center in the left-right direction. The lifting device 12 is mainly composed of a pair of left and right fixed masts 20, a pair of left and right movable masts 21, and a hydraulic cylinder (actuator) 22, as shown in FIGS. The left and right fixed masts 20 are formed from a channel steel or the like, and are arranged in the up-down direction so that the open portions face each other. The left and right fixed masts 20 are supported and connected by a U-shaped support 23 which is fixed upright on the support plate 18 in a plan view.

The left and right movable masts 21 are formed of a channel steel or the like, and are arranged vertically so that the open portions are opposed to each other between the left and right fixed masts 20. The top ends are connected. A fixed mast 2 is provided outside the left and right movable masts 21 in the left-right direction.
A movable body 27 such as a shoe or a roller provided movably in the up and down direction is mounted via a support shaft 28 in the inside of the movable mast 21. The fixed mast 20 is used as a guide to be movable in the vertical direction.

A movable body 31 such as a shoe or a roller is provided in the left and right movable masts 21 so as to be vertically movable. A movable body 33 is attached to the movable body 31 via a support shaft 32. Thereby, the movable body 33 is vertically movable by using the movable mast 21 as a guide, and the worktable 11 is fixedly attached to the movable body 33 (therefore, the worktable 11 is attached to the movable mast 21). It is movable vertically as a guide). The hydraulic cylinder 22 is disposed vertically between the left and right movable masts 21 so that a piston rod 22a projects upward. The lower end of the cylinder tube 22b is fixed to the support plate 18 and the upper end of the cylinder tube 22b. The side is U
It is supported by the support body 23 via a character fitting 34.

The piston rod 2 of the hydraulic cylinder 22
A sprocket 29 is attached to the distal end of 2a so as to be rotatable around a left-right axis, and a piston rod 22a is connected to the movable mast 21 side. One end of the elevating chain 35 hung on the sprocket 29 is engaged with the worktable 11 (movable body 33), and the other end is engaged with the support 23. Therefore, when the piston rod 22a of the hydraulic cylinder 22 is protruded upward, the movable mast 21 rises by the same amount as the amount of extension of the piston rod 22a, and the work table 11
It increases twice as much as the elongation of 2a.

By vertically tilting the elevating device 12 with respect to the vertical direction, the elevating direction of the worktable 11 may be slightly tilted with respect to the vertical direction (for example, by tilting the worktable 11 forward by 10 to 15 °). This makes it possible to move up and down along the tree shape. In addition, the lifting device 12 has an advantage that the projected area of the entire lifting device 12 with respect to the horizontal plane is smaller than that of the pantograph-type lifting device, so that it is less likely to be an obstacle during tree work. Also, when the work table 11 is directly mounted on the fixed mast 20 so as to be able to move up and down, a high fixed mast 2 can be obtained.
0 is required, but the movable mast 21
Is attached to the movable mast 21 so that the worktable 1
1 is mounted so as to be movable up and down, and the movable mast 21 is moved up and down by a hydraulic cylinder 22 to thereby guide the work table 11 (the fixed mast 20 and the movable mast 2).
1), the guide device is less likely to be caught on a branch or the like when traveling in an orchard or the like.

The lift operation of the lift valve 53a and the lift down valve 53b, which are electromagnetic valves for controlling the hydraulic cylinder 22 so that the piston rod 22a moves up, down, and down, is controlled by the lift up / down switch 37 of the control box 36. I can do it.
In the illustrated example, the motors 13L and 13R are DC motors that are PWM-controlled by the motor controller 51 (or may be electric motors such as AC motors or hydraulic motors), and correspond to the left and right front wheels 5L and 5R. The left and right front wheels 5L, 5R are independently driven to rotate forward and backward independently.

The left and right motors 13L, 13R are mounted on transmission cases 38 disposed on both left and right sides of the lifting device 12, respectively.
The transmission members 38 are attached to and fixed to support plates 39 fixed on both left and right sides of the connection member 9 for connecting the transmission members 13a and 13b. A transmission shaft 40 to which power is transmitted via a mechanism is provided to protrude outward in the left-right direction. Power is transmitted from the transmission shaft 40 to the axles 41 of the front wheels 5L, 5R via a transmission mechanism 30 such as a hoisting chain winding transmission mechanism, and the front wheels 5L, 5R are configured to be rotationally driven by the motors 13L, 13R. ing.

The rotational power from the engine 17 is transmitted to the front wheels 5L, 5L by power transmission devices such as gear transmission and belt transmission.
The mechanical drive for transmitting the rotational power from the engine 17 to the front wheels 5L and 5R may be used to control the vehicle speed and the rotational direction. Although a transmission is required, the drive system becomes complicated, and the vehicle speed is proportional to the engine speed (the same applies to driving via a hydraulic device), so that accurate speed control is difficult. By driving the front wheels 5L and 5R with the DC motors 13L and 13R as in the embodiment, forward and reverse rotations can be freely performed, and accurate speed control can be performed by detecting the motor rotation speed by the encoder 52. These controls are performed by the controller 4
8, the drive system can be simplified because a complicated speed change mechanism is not required.

In mechanical drive, the position of the operation unit also changes as the work table 11 moves up and down, so that a remote control method from the operation unit to the drive control unit can be restricted or complicated. Although an apparatus is required, in the case of the example shown in the drawing, the operation unit provided on the work table 11 and the drive control unit are connected by an electric harness, and the electric harness is flexible, so that the electric harness can be used when handling from a wire. There are few restrictions, and the remote control of the above-described multistage telescopic elevating device 12 becomes possible. In addition, since the battery 14, which is the power source for the motors 13L and 13R, is charged by the alternator 16, it is not necessary to move the battery 14 to a commercial power source and charge it as in a normal electric vehicle.

The output of the engine 17 is controlled by the front wheels 5L, 5L.
As for the transmission to the R, the engine 17 needs to have a large output. However, as shown in the example of FIG. 1, the driving force of the traveling system is obtained from the DC motors 13L and 13R.
Since the engine output can be small and the engine 17 is used at a constant rotational speed, an improvement in durability can be expected. Further, in the aerial work vehicle 1, the traveling speed (vehicle speed) is higher than the first speed mode in which the maximum speed is low (for example, 1 km / h) and higher than the first speed mode (for example, 1 km / h).
4km / h) It is possible to switch to the 2nd speed mode,
This mode switching is performed by the speed switch 42 of the control box 36.

The speed changeover switch 42 is constituted by, for example, a momentary illumination switch. The CPU map of the controller is changed so that each time the speed changeover switch 42 is pressed, the first speed mode and the second speed mode are alternately switched. And the switch lamp is turned on in the second speed mode (when the speed changeover switch 42 is ON, the second speed mode is set, and the OF switch is turned on).
The first speed mode is set in the F state). In the aerial work vehicle 1, the joystick lever 43 of the control box 36 allows the aerial work vehicle 1 to move back and forth and change direction (turn).

That is, the joystick lever 43 can be tilted in the forward, backward, left, right and oblique directions from the neutral position in the upwardly protruding state, and the right and left DC motors 13L and 13L are controlled by the inclination angle and the inclination direction of the joystick lever 43.
The rotation speed (output rotation speed) and the rotation direction (forward rotation / reverse rotation) of the 13R are configured to be controlled.
When the joystick lever 43 is tilted forward, it moves forward,
When the joystick lever 43 is tilted backward, it moves backward,
When leaning right while leaning forward, the peripheral speed of the right front wheel 5R becomes slower than the peripheral speed of the left front wheel 5L, turning diagonally forward and forward (turning rightward by forward movement), and leaning forward and left. When leaning forward, the peripheral speed of the left front wheel 5L becomes slower than the peripheral speed of the right front wheel 5R, turning diagonally forward left (turning forward and turning left), and leaning rightward while leaning backward. When the peripheral speed of the right front wheel 5R is lower than the peripheral speed of the left front wheel 5L, the vehicle turns diagonally rightward (turns backward to the right) and leans leftward while leaning rearward to rotate the left front wheel 5L. The peripheral speed is controlled so that the peripheral speed becomes lower than the peripheral speed of the front wheel 5R on the right side, and the vehicle turns diagonally to the left rearward (reversing to the left).

FIGS. 15 and 16 show the relationship between the inclination angle and the inclination direction of the joystick lever 43 and the peripheral velocities of the left and right front wheels 5L and 5R. FIG. 15 shows a CPU map (throttle map) in the first speed mode, and FIG. 16 shows a CPU map (throttle map) in the second speed mode. 15 and 16
In, the vertical axis indicates the inclination angle when the joystick lever 43 is inclined forward from the vertical state,
The horizontal axis indicates the inclination angle when the joystick lever 43 is inclined rightward from the vertical state. In the numerical values in parentheses, the numerical value on the left side indicates the peripheral speed of the left front wheel 5L, and the numerical value on the right side indicates the peripheral speed of the right front wheel 5R, and each unit is km / h. Further, the minus display of the numerical value in parentheses indicates that the joystick lever 43 is rotated in a direction opposite to the direction in which the joystick lever 43 is tilted (in FIG. 15, it is rotated backward).

For example, in the case of (0,0), the left and right front wheels 5
Both the peripheral speeds of L and 5R are stopped at 0 km / h, and in the case of (2, 1), the left front wheel 5L has a peripheral speed of 2 km.
/ H, and the right front wheel 5R moves forward at a peripheral speed of 1 km / h, and in the case of (1, −1), the left front wheel 5L moves at a peripheral speed of 1 k
The vehicle rotates forward at m / h, and the right front wheel 5R rotates backward at a peripheral speed of 1 km / h. 15, the minimum turning in the first speed mode is an interlining turn (in-situ turning) that turns around the central portion between the left and right front wheels 5L and 5R. From FIG. 16, the minimum turning in the second speed mode is performed. The turning is a one-wheel turning around the right front wheel 5R (one of the left and right front wheels).

Therefore, the switching operation of the speed changeover switch 42 limits the turning method at the same time as switching the maximum speed. 15 and FIG. 16, when moving forward, the peripheral speed of the left and right front wheels 5 </ b> L and 5 </ b> R increases as the forward inclination angle of the joystick lever 43 increases, and when turning (or turning), the joystick lever increases. The greater the inclination angle of 43 to the right,
The peripheral speed difference between the left and right front wheels 5L and 5R is controlled to be large. However, in the case of interlining turn, the larger the joystick lever 43 is to the right, the larger the left and right front wheels 5L and 5R are.
The peripheral speeds of L and 5R are controlled to increase.

FIGS. 15 and 16 show the inclination angle when the joystick lever 43 is inclined forward, the inclination angle when the joystick lever 43 is inclined rightward, the peripheral velocities of the left and right front wheels 5L and 5R. However, the relationship between the inclination angles of the joystick lever 43 in other directions and the peripheral speeds of the left and right front wheels 5L and 5R is the same as the relationship shown in FIGS. Illustration is omitted. Also, if the skid steer that brakes one of the left and right front wheels 5L, 5R with a brake is used to turn the road, the road surface will be damaged, but the rotation of the motors 13L, 13R as described above. When the vehicle is turned by controlling the speed, there is an advantage that the slip on the ground contact surface is small and the road surface is not damaged.

In FIGS. 15 and 16, the front wheel 5
The peripheral speeds of L and 5R are stepwise shifts when the joystick lever 43 exceeds a predetermined range of inclination angle, but may be steplessly changed.
An electromagnetic clutch brake 58 (see FIG. 14) is attached to the motors 13L and 13R, and the front wheels 5L and 5R can be braked by the electromagnetic clutch brake 58. The electromagnetic clutch brake 58 is configured to operate only when the joystick lever 43 is neutral.

In the aerial work vehicle 1 of the present embodiment,
Only when the joystick lever 43 is in the neutral position,
When the joystick lever 43 is not at the neutral position, even if the speed switch 42 is operated, the mode is not switched. Also,
As shown in FIG. 6, when the work table 11 is at the lowermost position is detected by a lift switch 47 including a limit switch or other sensor, and when the work table 11 is lifted and the lift switch 47 is turned off, 2 The first speed mode is forcibly set even in the high speed mode.
Further, even if the workbench 11 is lowered and the lift switch 47 is turned on and the workbench 11 is detected,
The mode can be switched by the speed switch 42 without returning to the speed mode.

In the aerial work vehicle 1, the work table 11 can be moved up and down even during traveling, and when traveling in the second speed mode, as described above, the work table 11 enters the first speed mode when it rises. Further, when the aerial work vehicle 1 is traveling on a downhill, by detecting the back electromotive force of the motors 13L and 13R, if it is determined that the aerial work vehicle 1 is accelerating by gravity, the motor controller The speed is reduced by a power generation brake which is a function attached to 51.

When the engine 17 is stopped, the power of the traveling system is cut off. When the key switch 44 is turned off during traveling, the work platform 1 gradually decreases its speed. It is designed to stop. Further, when the front wheels 5L and 5R are locked for a predetermined time (for example, 3 seconds), that is, there is no input from the encoder 52 even though the motor is output (even if one wheel rotates the wheel, If not detected), a continuous sound alarm buzzer 49 is sounded, the overload indicator 50 is turned on, and then the outputs of the motors 13L, 13R are stopped to protect the motors 13L, 13R.

In this case, the main switch is turned off,
When it is turned on again, it returns. The main switch includes a controller 48, a lift raising valve 53a,
The lift down valve 53b, the logic power supply of the motor controller 51, and the primary side of the recoil are turned ON / OFF. When the main switch is off, the engine 17
Stops. When the alternator 16 is abnormal, an intermittent alarm buzzer 49 sounds and the charge lamp 45 is turned on.

In the aerial work vehicle 1, the engine 17 is rotating and the alternator 16 can run only when the alternator 16 is normal. , The speed is gradually reduced to stop. After the key switch 44 is turned on and the main switch is turned on in order to determine whether the indicator lamp has run out, the charge lamp 45, the overload indicator 50, and the speed changeover switch 42 light up for several seconds (one second). ing.

The charge lamp 45 is connected to the engine 17.
Lights up until is started. Also, even when the engine 17 is stopped, if the lift lift switch 37 is operated to the down side, the emergency valve 54 (see FIG. 14) operates,
The worktable 11 can be lowered. The emergency valve 54 does not operate when the engine 17 is driven. When mechanically controlling the traveling of an aerial work platform, elevating and lowering a workbench, etc., a large number of mechanical mechanisms are required. Yes, the number of machine parts and adjustment items decrease.

As shown by a virtual line in FIG.
For example, a mounting table 57 for mounting a container or the like may be provided so as to cover the upper side of the engine 17. Thus,
The operating tools provided on the work table 11 include the lift elevating switch 37, a speed changeover switch 42 for switching the maximum traveling speed, a joystick lever 43 for steering, a key switch 44 for starting the engine 17, and the like. The operated components provided on the second side include a motor controller 51, a lift raising valve 53a, a lift lowering valve 53b, an engine 1
7 and the like, and a lift elevating switch 37 which is an operating tool,
By operating the lift-up valve 53a as the operated tool and the lift-down valve 53b as the operated tool, the speed changeover switch 42 for switching the maximum traveling speed as the operating tool and the joystick lever 43 for steering as the operating tool are operated. The motor controller 51 as the operated tool is operated via the controller 48, and the key switch 44 for starting the engine 17 as the operating tool operates the engine 17 as the operated tool.

A lifting / lowering switch 37 which is an operating tool provided on the workbench 11 side, a speed changeover switch 42 for switching the maximum traveling speed, a joystick lever 43 for steering, a key switch 44 for starting the engine 17, and the like, The motor controller 51, the lift raising valve 53a, the lift lowering valve 53b, the engine 17, and the like, which are the operated tools provided on the second side, are electrically connected by an electric cable (electric harness) 61 shown in FIGS. ing. Therefore, the operated tool is constituted by an electric device electrically operated by the operating tool, and a connection cable connecting the operating tool side and the operated tool side electrically connects the operating tool side and the operated tool side. It is constituted by an electric cable (electric harness) 61 to be electrically connected.

In FIG. 1 to FIG.
A plurality of mounting pieces 63 project from the fifth link 35a at intervals, and a plurality of connecting members 65 for holding the electric cables 61 are mounted on the mounting pieces 63 at intervals.
The mounting piece 63 has a rectangular plate shape and has a mounting hole 6 at the center.
6 are provided. The connecting member 65 is made of a flexible metal plate, a synthetic resin plate, or the like, and is formed in a strip shape having mounting holes 67 at both ends. Connecting member 65
Are bent in an annular shape, and are attached to the mounting piece 6 by a bolt nut 68 inserted into the mounting hole 66 and the mounting hole 67 of the mounting piece 63.
3 and the connecting member 65 is connected to the electric cable 6.
1 to hold the electric cable 61. As a result, the electric cable 61 is connected and fixed at a plurality of locations at intervals with respect to the elevating chain 35,
An electric cable 61 for connecting the operation tool side and the operated tool side is held along the elevating chain 35.

According to the above embodiment, the electric cable 6
1 is connected to the elevating chain 35 at a plurality of locations at intervals and is held along the elevating chain 35, so that the electric cable 61 is an electric cable having the same bending durability as the radius of the sprocket 29. If it is 61,
The same movement as the elevating chain is performed, so that it can stably follow the up-and-down movement of the elevating chain 35.
The electric cable 61 is connected to the hoisting chain 35
And the electric cable 61 does not slack, and it is possible to prevent the electric cable 61 from being caught by an obstacle. There is no risk of the cable 61 being unexpectedly cut or damaged.

Further, it is not necessary to use a dedicated chain having a function of accommodating an electric cable as the elevating chain 35 for moving the work table 11 up and down. For example, a chain with an attachment (attachment piece 63) which is commercially available at a low cost is used. And the manufacturing cost is reduced. Further, a special pulley or the like for holding the electric cable 61 becomes unnecessary. FIG. 17 shows another embodiment, in which a connecting member 6 is provided.
5 is curved in an annular shape and is fastened and fixed by a bolt nut 68 inserted into the mounting hole 66 and the mounting hole 67 of the mounting piece 63, whereby an annular portion is formed in the connecting member 65, and a ring portion of the connecting member 65 is formed. The electric cable 61 is inserted. Thus, in a state where the electric cable 61 is held slidably relative to the connecting member 65, the electric cable 61 is connected to the elevating chain 35 at a plurality of locations with an interval, and the operation tool side and the operated member are operated. An electric cable 61 for connecting to the component side is held along the elevating chain 35. Other points are the same as those of the above-described embodiment.

FIG. 18 shows another embodiment, in which the connecting member 6
5 is made of wire, the connecting member 65 is bent in a ring shape, the electric cable 61 is tied by the connecting member 65, and one end of the connecting member 65 is inserted into the mounting hole 66 of the mounting piece 63, and the connecting member 65 is The electric cable 61 is connected to the elevating chain 35 at a plurality of locations at intervals by the connecting member 65 so that the electric cable 61 is held along the elevating chain 35. It has become. Other points are the same as those of the above-described embodiment.

In the above embodiment, the connecting member 65
Is constituted by a band plate material or a wire, and the electric cable 61 is held along the elevating chain 35 using the band plate material or the wire. The connecting member 65 ties the electric cable 61 to the mounting piece 63 of the elevating chain 35,
Thereby, the electric cable 61 may be held along the elevating chain 35, or the connecting member 65 may be formed of a clip, and the electric cable 61 is connected to the mounting piece 63 of the elevating chain 35 by the connecting member 65. Thus, the electric cable 61 may be held along the lifting chain 35.

Further, in the above embodiment, the operated tool is constituted by an electric device electrically operated by the operating tool, and the connection cable for connecting the operating tool and the operated tool is connected to the operating tool. It is composed of an electric cable (electric harness) 61 for electrically connecting the side and the operated tool side,
Instead of this, the operated tool provided on the vehicle body 2 side is constituted by a device mechanically operated by the operating tool on the workbench 11 side, and a connection cable for connecting the operating tool side and the operated tool side is provided. The operating tool side and the operated tool side may be configured by a push-pull cable or a wire for interlocking connection. That is, for example, the operating tool is configured by an operating rod or brake labor for brake operation, the operated tool is configured by a mechanical brake device, and the operating rod or brake lever and the brake device are connected by a push-pull cable or wire. The brake device may be operated by operating the operating lever or the brake lever after the connection.

Further, in the above-described embodiment, the lifting line for raising and lowering the work table 11 is constituted by the lifting chain 35 wound around the sprocket 29. Instead, the lifting line is connected to the lifting wire. Other configurations may be used.

[0048]

According to the present invention, it is not necessary to use a dedicated chain having a cable storage function, and connection cables can be wired at low cost. In addition, there is no possibility that the connection cable is unexpectedly cut or damaged due to the connection cable being wobble or being pulled by the elevation of the work table 11.

[Brief description of the drawings]

FIG. 1 is a plan view of a side view of a lifting device.

FIG. 2 is an exploded perspective view of a chain and an electric cable portion.

FIG. 3 is a front sectional view of an aerial work vehicle of a chain and an electric cable portion.

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

FIG. 5 is a plan view of the aerial work vehicle.

FIG. 6 is a side view of the aerial work vehicle.

FIG. 7 is a front view of the aerial work vehicle.

FIG. 8 is a rear view of the aerial work vehicle.

FIG. 9 is a plan view of the vehicle body.

FIG. 10 is a side view of a work table and a lifting device.

FIG. 11 is a front view of the lifting device.

FIG. 12 is a plan view of a lifting device.

FIG. 13 is a plan view of a control box.

FIG. 14 is a configuration diagram of a control system.

FIG. 15 is a diagram showing a throttle map in a first speed mode.

FIG. 16 is a diagram showing a throttle map in a second speed mode.

FIG. 17 is a front sectional view of a chain and an electric cable portion according to another embodiment.

FIG. 18 is a front sectional view of a chain and an electric cable part according to another embodiment.

[Explanation of symbols]

 2 Body 11 Workbench 17 Engine (operated tool) 29 Sprocket 35 Elevating chain (elevating cable) 61 Electric cable (connection cable) 37 Lift elevating switch (operating tool) 42 Speed switch (operating tool) 43 Joystick lever (operating) 44) Key switch (operating tool) 51 Motor controller (operated tool) 53a Lift up valve (operated tool) 53b Lift down valve (operated tool) 61 Electric cable (connection cable) 63 Mounting piece 65 Connecting member

Claims (5)

[Claims] 1. A worktable (1) which can be moved up and down on a vehicle body (2).
1), the workbench (11) is moved up and down via an elevating rope, and an operating tool provided on the worktable (11) side operates an operated tool provided on the vehicle body (2) side. In the work vehicle, the connection cable is connected to the lifting cable at a plurality of locations so as to hold the connection cable connecting the operating tool side and the operated tool side along the lifting cable. An aerial work vehicle characterized by being used. 2. The electric device according to claim 1, wherein the operated device is an electric device electrically operated by the operating device, and the connection cable electrically connects the operating device side and the operated device side. 2. The aerial work vehicle according to claim 1, wherein the aerial work vehicle is configured by an electric harness. 3. 3. The operating device is constituted by a device mechanically operated by an operating device, and the connection cable is constituted by a push-pull cable or a wire for interlocking connection between the operating device side and the operated device side. The aerial work vehicle according to claim 1, wherein: 4. The hoisting rope body includes a sprocket (29).
The lifting chain (35) is wound around the link (35a) of the lifting chain (35).
3) A plurality of connecting members (65) projecting at intervals and holding the electric cable (61) on the mounting pieces (63).
The aerial work vehicle according to any one of claims 1 to 3, wherein a plurality of are mounted at intervals. 5. The height according to claim 4, wherein the work table (11) is moved up and down via a lifting chain (35) by moving the sprocket (29) up and down. Work vehicle.