JP2546280Y2 - Safety equipment for aerial work vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an aerial work vehicle working in an orchard or the like.

[0002]

2. Description of the Related Art Conventionally, an aerial work vehicle used in an orchard or the like is configured such that a traveling switch for traveling an airframe and an operation switch of a vertical lifting device having a working deck can be operated independently of each other. Have been.

[0003]

However, in the aerial work vehicle described above, the traveling switch and the operation switch for the up-and-down lifting device for moving the working deck up and down are independent of each other. When the running switch is suddenly turned on while the vehicle is raised high, the work deck is greatly shaken, which is dangerous, and the machine has a high center of gravity, which causes problems such as falling down.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a traveling apparatus is operated in an aerial work vehicle in which a traveling platform having a traveling apparatus and an up-and-down elevating apparatus having a work deck on the upper side are connected. A travel switch is provided, and one of the two hydraulic operation switches for operating the up-and-down lifting device is provided on the work deck side, the other is provided on the traveling trolley, and at least one of the hydraulic operation switches is ON. And when two or more of the switches are ON, neither the traveling device nor the up-and-down lifting device is operated. To provide a safety device for aerial work vehicles.

In the present invention, the traveling switch is turned on in the traveling switch and the two hydraulic operation switches.
Also, there is a feature that the hydraulic operation switch is not turned on when the operation is performed.

[0006]

DETAILED 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 are 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 vehicle, 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 on the traveling vehicle 5 side.
10 and a turning hydraulic cylinder provided between the mounting pin 11 protruding below the turntable 7.
Can be turned freely.

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

Reference numeral 13 denotes a base 13-1 which 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.
-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 prime mover mounted on the rear part of the traveling vehicle 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 motor 25 side,
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 formed of an auxiliary wheel 30-1 that can be stored, and is connected to a front portion of the traveling vehicle 5 via a link mechanism 31. Reference numeral 32 denotes an outrigger hydraulic cylinder, and the turntable 7 is rotated by the turning hydraulic cylinder 9 to rotate the first boom 13 and the second boom 13.
When the boom 15 starts turning, the outrigger hydraulic cylinder 32 operates in conjunction therewith, and the outrigger 30 is protruded to contact the ground. 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 travel and turn while the outrigger 30 is in contact with the ground, so that work can be performed efficiently. .

FIG. 6 is an electric circuit diagram, in which reference numeral 40 denotes a charger connected to the battery 36, and reference numeral 41 denotes an input-side controller connected to a hydraulic operating lever or the like. Reference numeral 42 denotes an output-side controller that controls the traveling motor 43. Reference numeral 44 denotes a positive electrode 12V wiring for connecting one battery 36-1 and the output side controller 42, and reference numeral 45 denotes a positive electrode 24V wiring. Reference numeral 46 denotes a wiring connecting the negative electrode of one battery 36-1 and the output-side controller 42, and a breaker 47 is interposed on the way.

Reference numeral 48 denotes a hydraulic operation lever installed on the work deck 21 side, and a right lever switch 49 and a left counter switch 48A, which are hydraulic levers 48A, in a cross lever system.
50, an up switch 51 and a down switch 52 are provided. Numeral 53 denotes a hydraulic operation lever provided on the traveling vehicle 5 side, which is provided with an ascending switch 54 and a descending switch 55, and is linked to the ascending switch 51 and the descending switch 52, respectively.

Reference numeral 56 denotes a hydraulic operation safety switch, and 57 denotes a relay mechanism connected to the left and right turning switches 49 and 50 and the lifting and lowering switches 51 and 52. The right turning relay 58 and the left turning relay 58 are connected.
59, an ascending relay 60, and a descending relay 61 are provided. 62
Is a solenoid valve for turning, 63 is a solenoid valve for lifting and lowering, and 64 and 65 are protection diodes.

A main switch 66 is connected to the input controller 41 and is provided on the work deck 21 side. 67 is a main switch provided on the traveling vehicle 5 side, 68 is a traveling device safety switch, and 69 is a traveling switch for operating the traveling motor 43.

FIG. 7 is a detailed view showing the inside of the input-side controller 41, in which 48A is a work deck.
The hydraulic operation lever 48
It is linked to.

Reference numeral 53A denotes a hydraulic operation switch provided on the traveling trolley 5 side, and is interlocked with the hydraulic operation lever 53. The hydraulic operation switches 48A, 53A and the traveling switch 69 are connected to a relay 72 while being connected to each other via a comparison circuit 70 and an AND circuit 71. The relay contact 73 is turned on when only one of the hydraulic operation switch 48A, the other hydraulic operation switch 53A, and the traveling switch 69 is turned on, and at least two of the switches 48A, 53A, 69 are simultaneously turned on. When ON, the relay contact 73 is turned off.
F, so that neither the traveling device 1 nor the up-and-down elevating device B is operated. Further, with the above configuration, the hydraulic operation switches 48A and 53
The safety device C is configured such that the traveling switch 69 cannot be turned on while A is operating, and the hydraulic operation switches 48A and 53A are not turned on when the traveling switch 69 is turned on.

The traveling device safety switch 68
Is linked to the traveling clutch pedal, and is configured to be turned on when the clutch pedal is depressed.

Since the hydraulic operation switch 48A connected to the hydraulic operation lever 48 is provided with the hydraulic operation safety switch 56, the hydraulic operation switch 48 operates unless the pedal is operated to turn on the hydraulic operation safety switch 56. It does not.

FIG. 8 shows a traveling motor of the traveling device.
FIG. 14 is a flowchart showing a procedure until the 43 rotates.

FIG. 9 is a flowchart showing a procedure for operating the hydraulic operating switch 48A on the work deck 21 to operate the vertical lifting device B and the turning device.

FIG. 10 is a flowchart showing a procedure for operating the hydraulic operating switch 53A on the traveling vehicle 5 side to operate the vertical lifting device B.

The embodiment of the present invention is configured as described above. When the aerial work vehicle A is carried into the orchard and the aerial work is carried out, the main switch 66 provided on the work deck 21 is operated. At the same time, the traveling device safety switch 68 is turned on.

Next, the traveling switch 69 is operated to rotate the traveling motor 43 to move the aircraft to a predetermined working position.

When the turning hydraulic cylinder 9 and the lifting hydraulic cylinder 17 are operated from the work deck 21 side,
After turning on the hydraulic operation safety switch 56, the hydraulic operation lever
By operating the hydraulic switch 48A, turning and vertical movement are performed by operating the hydraulic switch 48A.

Further, even if the hydraulic operation switch 53A provided on the traveling carriage 5 is operated, the lifting hydraulic cylinder 17 is operated, and the work deck 21 is operated in the vertical direction.

In this case, the traveling switch 69 is turned on.
Is set so that the hydraulic operation switches 48A and 53A are not turned on. Conversely, when the hydraulic operation switches 48A and 53A are ON, the traveling switch 69 is not ON.

As described above, according to the above-described embodiment, in the aerial work vehicle in which the up-and-down elevating device B having the work deck 21 on the upper part is connected to the traveling vehicle 5 having the traveling device 1, A travel switch 69 for operating the traveling device 1 is provided, and one of the two hydraulic operation switches 48A and 53A for operating the up-and-down elevating device B is provided on the work deck 21 side, and the other is on the traveling cart 5 side. The traveling switch 69 is not turned on when at least one of the hydraulic operation switches 48A and 53A is turned on. Is reliably stopped, so that work at height can be performed safely. Also, if the aircraft is traveling,
Since the vertical lifting device B is stopped, the work deck 21 does not collide with an obstacle and is not damaged.

[0037]

According to the present invention, there is provided a traveling work apparatus for operating a traveling apparatus in an aerial work vehicle in which an up-and-down elevating apparatus having a working deck provided on an upper portion is connected to a traveling vehicle having a traveling apparatus. A switch is provided, and one of the two hydraulic operation switches for operating the up-and-down lifting device is provided on the work deck side, the other is provided on the traveling trolley, and at least one of the hydraulic operation switches is ON. Since the safety device is configured so that the traveling switch is not turned on when the operation is performed, the traveling of the aircraft is surely stopped when the vertical lifting device is operated.

Accordingly, since the hydraulic operation switches for operating the up-and-down elevating device are separately arranged vertically and separately, work at a high place can be efficiently performed and work can be safely performed by the safety device. Moreover, when two or more of the two hydraulic operation switches and the traveling switch are turned on, neither the traveling device nor the up-and-down elevating device is actuated. Even when the above-mentioned switch is turned on, it is possible to prevent an accident from occurring, and it is possible to ensure safety.

Also, in the present invention, since the hydraulic switch is not turned on while the traveling switch is turned on and the machine is traveling, the up-and-down elevating device supporting the work deck is reliably stopped, and the machine is driven. And the work deck can be prevented from colliding with obstacles,
It is always possible to work in a safe state.

[Brief description of the drawings]

FIG. 1 is an overall side view of an aerial work vehicle equipped with the present invention device.

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.

FIG. 6 is an electric circuit diagram of a main part of the present invention.

FIG. 7 is a detailed view of the electric circuit diagram.

FIG. 8 is a flowchart showing a procedure until the traveling motor rotates.

FIG. 9 is a flowchart showing a procedure until a vertical operation device and a turning device are operated by a hydraulic operation switch.

FIG. 10 is a flowchart showing a procedure up to activation of the up-and-down elevating device by a hydraulic operation switch.

[Explanation of symbols]

 B Vertical lifting device 1 Traveling device 5 Traveling trolley 21 Work deck 48A Hydraulic operation switch 53A Hydraulic operation switch 69 Traveling switch

Claims (2)

(57) [Scope of request for utility model registration] A traveling switch for activating a traveling device in a high-altitude work vehicle in which a vertical lifting device having a working deck on the upper side is connected to a traveling vehicle having the traveling device. 69, and one of the two hydraulic operation switches 48A and 53A for operating the vertical lifting device B is provided on the work deck 21 side, the other is provided on the traveling vehicle 5 side, and the hydraulic operation switches 48A and 48A are provided.
When at least one of 53A is turned on, the traveling switch 69 is configured not to be turned on.
Two or more of switches 48A, 58A, 69 are ON
Occasionally, both the traveling device 1 and the vertical lifting device B operate
A safety device for an aerial work vehicle, wherein the safety device is configured not to be mounted. 2. The hydraulic switch 48A, 53A is not turned on when the travel switch 69 is turned on among the travel switch 69 and the two hydraulic operation switches 48A, 53A. 2. The safety device for an aerial work vehicle according to 1.