JPH04122600U - Safety equipment for aerial work vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] To enable safe work at height using a vehicle for working at height. [Structure] Of the two hydraulic operation switches that operate the vertical lifting device, one is installed on the work deck side and the other is installed on the traveling truck side, and when the hydraulic operation switch is ON, the traveling switch is ON. It was configured so that it would not occur.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to safety devices for aerial work vehicles used in places such as orchards. It is.

0002

[Conventional technology]

Conventionally, aerial work vehicles used in orchards, etc. have a running platform that moves the machine. The switch and the operating switch for the vertical lifting device with a working deck are each independently operated. configured for operation.

0003

[Problem that the idea aims to solve]

However, in the above-mentioned aerial work vehicle, the travel switch and work deck are The operation switch for the vertical lifting device that moves downward is independent, so the work device is If you suddenly turn on the travel switch with the vehicle raised high, The deck shakes violently, which is dangerous, and the aircraft's center of gravity is high, so there is a risk of it falling over. Something was happening.

0004

[Means to solve the problem]

The present invention consists of a traveling platform equipped with a traveling device and a working deck on the upper part. In an aerial work vehicle that is equipped with a lowering/elevating device, there is a traveling platform that operates the traveling device. In addition to installing a switch, there are also two hydraulically operated switches that operate the vertical lifting device. One side is installed on the work deck side, the other side is installed on the traveling trolley side, and the same hydraulic operation switch is installed. When at least one of the switches is turned on, the running switch is turned on. We would like to provide a safety device for an aerial work vehicle characterized by a structure that prevents It is something to do.

[0005] In addition, the present invention has the above-mentioned travel switch and two hydraulically operated switches. When the row switch is turned on, the hydraulic operation switch will not be turned on. It also has characteristics.

[0006]

【Example】

The present invention will be described in detail below based on embodiments shown in the accompanying drawings.

[0007] 1 and 2 show side views of a boom type aerial work vehicle according to the present invention. 1 in the diagram is , in the traveling device of the boom type aerial work vehicle A, the endless track bodies 4 are attached to the driving wheels 2 and the driven wheels 3. It is wrapped so that it can rotate freely. Reference numeral 5 denotes a running trolley, which has a swing bearing 6 hanging vertically in the center. Ru. 7 is a turntable placed on the co-swivel bearing part 6, and the side surface shape is triangular at the top. A boom bracket 8 that forms a shape is provided protrudingly.

[0008] In addition, 9 protrudes from the base mounting pin 10 on the side of the traveling trolley 5 and the lower side of the turntable 7. A swing hydraulic cylinder installed between the mounting pin 11 and the mounting pin 11, The turntable 7 can be freely rotated by the expansion and contraction operation of the cylinder 9. .

[0009] 12 is a swivel joint provided on the lower side of the turntable 7, and the swivel joint 12 is 6 to form a rotating portion 6A.

0010 13 is a first boom having a base 13-1 pivoted to the boom bracket 8, and an upper end 13-2. A second boom 15 is connected to the lateral support shaft 14 via a horizontal pivot shaft 14. 16 is the base of the first boom 13 This is a mounting shaft for pivotally mounting 13-1 to the boom bracket 8. 17 is turntable 7 and A hydraulic cylinder for lifting and lowering installed between the upper part of the first boom 13 and the upper part of the first boom 13. The first boom 13 can be raised and lowered by the da 17. 18 is the equipment for the lifting hydraulic cylinder 17. This is the mounting pin for attaching the

[0011] Further, 19 is a triangular parallel support body pivotally supported on the horizontal support shaft 14, which is parallel to the horizontal support shaft 14. Between the lower end 19-1 of the row holder 19 and the turntable 7, there is a A first parallel link 20 that moves in parallel is provided in a spanning manner. 20-1 and 20-2 are the first This is the mounting pin for parallel link 20.

0012 21 is a working deck connected to the upper end of the second boom 15, parallel to the working deck 21. A second parallel boom that moves parallel to the second boom 15 is provided between the upper end portion 19-2 of the holder 19 and the second boom 15. Links 22 are provided in a spanning manner. 23 is a mounting pin for attaching the work deck 21; 22-1 and 22-2 are mounting pins of the second parallel link 22.

[0013] In addition, 21-1 is a mounting member for the work deck 21, and 24 is a rear end mounting member for the turntable 7. A boom interlocking link that interlocks and connects the section 7-1 and the rear end section 15-1 of the second boom 15, The boom interlocking link 24 is swingably attached.

[0014] In addition, 25 is the prime mover mounted on the rear of the traveling truck 5, and 26 is the HST mission case. It is connected to the drive wheel 2 at the bottom. 25-1 is the drive pulley on the motor 25 side, 26-1 is the driven pulley on the HST mission case 26 side.

[0015] The prime mover 25 and HST mission case 26 are interlocked by an endless belt 27. tied together.

[0016] In addition, in Fig. 5, 30 is an outrigger consisting of a retractable auxiliary wheel 30-1. It is connected to the front part of the traveling truck 5 via a link mechanism 31. 32 is outrigger The turntable 7 is rotated by the hydraulic cylinder 9 for turning. When the first boom 13 and second boom 15 start turning, the outrigger moves in conjunction with this. The gar hydraulic cylinder 32 is activated, causing the outrigger 30 to protrude and touch the ground. In addition , 33 is a hydraulic switching valve, 34 is a hydraulic pump, and 35 is a hydraulic oil tank. Also, 36 is a tar This is a battery placed on the digital table 7.

[0017] The above-mentioned auxiliary wheel 30-1 is configured as a spherical rotating body, so that the aircraft can travel and turn easily. is easy.

[0018] When the turntable 7 rotates, the outrigger 30 is moved to the first boom 13. When the second boom 15 starts to rotate, it automatically protrudes and touches the ground, making it easier to work at heights. It can be carried out safely and danger prevention is ensured.

[0019] In addition, by making the auxiliary wheel 30-1 of the outrigger 30 a spherical rotating body, The machine can run and turn with the Rigger 30 on the ground, making work more efficient. It is something that can be done.

[0020] In addition, FIG. 6 is an electrical circuit diagram, where 40 is a charger connected to the battery 36, and 41 is a charger connected to the battery 36. The input side controller is connected to a hydraulic control lever, etc. 42 is the running motor -43 is the output side controller. 44 is one battery 36-1 and output side The wiring for the positive terminal 12V that connects to the controller 42, 45 is the wiring for the positive terminal 24V. It is a line. 46 is connected to the negative pole of one battery 36-1 and the output side controller 42. It is a continuous wiring, and a breaker 47 is interposed in the middle.

[0021] 48 is a hydraulic operating lever installed on the work deck 21 side, and is a cross lever type. In addition, the hydraulic operation switch 48A is a right turn switch 49, a left turn switch 50, A rising switch 51 and a descending switch 52 are provided. Also, 53 is on the traveling trolley 5 side. A hydraulic control lever is provided with a rising switch 54 and a descending switch 55. These are interlocked and connected to the up switch 51 and the down switch 52.

[0022] 56 is the hydraulic operation safety switch, 57 is the left/right rotation switch 49, 50 and the lift switch. The relay system connects to switches 51 and 52, with relay 58 for right turn, relay 59 for left turn, A rising relay 60 and a descending relay 61 are provided. 62 is a turning solenoid valve, 63 is a solenoid valve for lifting and lowering, and 64 and 65 are protection diodes.

[0023] In addition, 66 is the main switch connected to the input side controller 41 and the work deck 21 It is located on the side. 67 is the main switch installed on the traveling trolley 5 side, 68 is the traveling device The safety switch 69 is a running switch that operates the running motor 43. .

[0024] Further, FIG. 7 is a detailed diagram showing the inside of the input side controller 41, and in the figure, 48A is a hydraulic operation switch provided on the working deck 21 side and is connected to the hydraulic operation lever 48. It's moving.

[0025] 53A is a hydraulic operation switch provided on the traveling trolley 5 side, and is connected to the hydraulic operation lever 53. It's linked. The hydraulic operation switches 48A, 53A and the travel switch 69 are are connected to the relay 72 while being connected to each other via the comparison circuit 70 and the AND circuit 71. There is. Then, one hydraulic operation switch 48A and the other hydraulic operation switch 53A When only one of the running switches 69 is turned on, the relay contact 73 turns on and , if two or more of the above switches 48A, 53A, and 69 are ON at the same time, relay contact 73 is configured to be OFF. Moreover, with the above configuration, the vertical lifting device B Travel switch 69 cannot be turned on while hydraulic operation switches 48A and 53A are operating. In addition, when the travel switch 69 is ON, the hydraulic operation switch 48A, 53 Safety device C is configured to prevent A from turning ON.

[0026] Additionally, the safety switch 68 for the traveling device is linked to the traveling clutch pedal. The clutch pedal is configured to be turned on when the clutch pedal is depressed.

[0027] Note that the hydraulic operation switch 48A connected to the hydraulic operation lever 48 is a hydraulic operation safety switch. Since a switch 56 is provided, press the pedal to turn on the hydraulic operation safety switch 56. The hydraulic operation switch 48 will not operate unless operated.

[0028] In addition, Figure 8 shows the procedure until the traveling motor 43 of the traveling device rotates. It is a flowchart figure.

[0029] Figure 9 shows the vertical lifting device operated by hydraulic operation switch 48A on the working deck 21 side. FIG. 3 is a flowchart showing the procedure up to actuation of B and the turning device.

[0030] Figure 10 shows the vertical lifting device B by operating the hydraulic operation switch 53A on the side of the traveling trolley 5. FIG. 3 is a flowchart showing the procedure up to activation of the .

[0031] The embodiment of the present invention is configured as described above, and the above-mentioned aerial work vehicle A is installed inside an orchard. When carrying out work at high places, the main switch 66 installed on the work deck 21 At the same time, turn on the traveling gear safety switch 68.

[0032] Next, operate the travel switch 69 to rotate the travel motor 43 to perform the prescribed work. Move the aircraft to the location.

[0033] Also, from the work deck 21 side, a swing hydraulic cylinder 9 and a lifting hydraulic cylinder 17 are installed. , turn on the hydraulic operation safety switch 56 and then turn the hydraulic operation lever 48. It is operated to rotate and move up and down using the hydraulic operation switch 48A.

[0034] In addition, even if the hydraulic operation switch 53A provided on the traveling trolley 5 side is operated, the lifting hydraulic system will not be activated. When the cylinder 17 operates, the working deck 21 is operated in the vertical direction.

[0035] In this case, when the travel switch 69 is turned on, the hydraulic operation switch The configuration is such that channels 48A and 53A are not turned on. Conversely, hydraulically operated switches When switches 48A and 53A are turned on, the running switch 69 is not turned on. Ru.

[0036] As described above, according to the above embodiment, the upper In an aerial work vehicle in which a vertical lifting device B equipped with a working deck 21 is connected to the , a traveling switch 69 is provided to operate the traveling device 1, and a vertical lifting device B is provided. Of the two hydraulic operation switches 48A and 53A to be activated, place one on the work deck 21 side. One of the hydraulic operation switches 48A and 53A is installed, and the other is installed on the traveling trolley 5 side. The drive switch 69 is configured so that it is not turned on when at least one of the switches is turned on. This ensures that the aircraft will run reliably when the vertical lift device B is activated. Since the machine is stopped, work at height can be carried out safely. Also, if the aircraft is running If the work deck 21 collides with an obstacle, the vertical lifting device B has stopped. There is no possibility of accidental damage.

[0037]

[Effect of the idea]

According to the present invention, a working deck is provided on the top of a traveling vehicle having a traveling device. In an aerial work vehicle that is equipped with a vertical lifting device that operates the In addition to providing a switch for rowing, there are also two hydraulically operated switches that operate the vertical lifting device. One of the two is installed on the work deck side, the other on the traveling trolley side, and the same oil When at least one of the pressure operation switches is turned on, the travel switch Since the safety device is configured to prevent the When the vehicle is in the air, the movement of the aircraft will be reliably stopped.

[0038] Therefore, the hydraulic operation switch that operates the vertical lifting device is divided into upper and lower parts. Work at heights can be done efficiently because of the location of the can be done safely.

[0039] In addition, this invention does not allow the hydraulic operation switch to be activated when the travel switch is turned on and the aircraft is traveling. Since the switch is not turned on, the vertical lifting device that supports the work deck must be properly installed. The aircraft actually stops, the aircraft is easy to move, and the working deck collides with obstacles. This prevents such incidents and allows work to be carried out in a safe manner at all times.

[Brief explanation of drawings]

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

FIG. 6 is an electrical circuit diagram of the main parts of the present invention.

FIG. 7 is a detailed diagram of the electrical circuit diagram.

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

FIG. 9 is a flowchart showing a procedure for operating a vertical lifting device and a turning device using a hydraulic operation switch.

FIG. 10 is a flowchart showing the steps up to operating the vertical lifting device using the hydraulic operation switch.

[Explanation of symbols]

B Vertical lifting device 1 Traveling device 5 Traveling trolley 21 Working deck 48A Hydraulic Operated Switch 53A Hydraulic Operation Switch 69 Travel switch

──────────────────────────────────────────────── ─── Continued from front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location B66F 11/04

Claims (2)

[Scope of utility model registration request] 1. A traveling switch for operating the traveling device 1 in an aerial work vehicle comprising a traveling platform 5 having a traveling device 1 and a vertical lifting device B having a working deck 21 on the upper part. 69, and two hydraulic operation switches 48A, 53A for operating the vertical lifting device B, one of which is provided on the work deck 21 side and the other on the traveling trolley 5 side; 53A. A safety device for an aerial work vehicle, characterized in that a running switch 69 is not turned on when at least one of the switches 53A and 53A is turned on. 2. A claim characterized in that in the running switch 69 and the two hydraulically operated switches 48A, 53A, when the running switch 69 is turned on, the hydraulically operated switches 48A, 53A are not turned on. The safety device for the high-altitude work vehicle described in 1.