Transportation vehicle

Abstract

To provide a system capable of safely operating a drive device such as a dump cylinder of a transportation vehicle.SOLUTION: In order to solve a problem, a transportation vehicle 1 of the present invention includes a drive device 5, a control unit 3, and operation units (33, 34). The drive device 5 moves a member. The control unit 3 actuates upon receiving supply of power from a branched power transmission line 212 branched from a power transmission line 211 of a hazard lamp 21 or a parking light. The control unit 3 includes the operation units (33, 34). The operation units (33, 34) control operation of the drive device 5.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a transport vehicle such as a dump truck, a trailer (transport vehicle) having a dump cylinder attached to its bed, or a trailer (transport vehicle) attached to a tractor. [Background technology]

[0002] Conventionally, there has been a demand for a transport vehicle that allows the lifting and lowering of the loading platform to be remotely controlled, as in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4634473 Summary of the Invention [Problem to be solved by the invention]

[0004] In particular, in transport vehicles equipped with a remote control unit to raise and lower the loading platform, there have been problems such as when an operator puts the remote control unit in their pocket, the switch being accidentally activated, causing the loading platform to move at an unexpected time. Furthermore, even in transport vehicles that are not equipped with a remote control unit, there have been cases where an operator was performing an inspection when another operator accidentally operated the dump cylinder start switch, putting the operator in danger.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a system that can safely operate a drive device such as a dump cylinder of a transport vehicle. [Means for solving the problem]

[0006] In view of the above problems, the present invention has the following configuration. A transport vehicle comprising a drive unit and a control unit, the drive unit for moving members, the control unit for operating by receiving power from a branch power line branching off from a power line for hazard lamps or parking lights, and an operating unit for controlling the operation of the drive unit. Effect of the Invention

[0007] The present invention provides an advantage that a drive device such as a dump cylinder of a transport vehicle can be safely operated. [Brief description of the drawings]

[0008] [Figure 1] Fig. 1 is an explanatory diagram of an embodiment. Fig. 1(A) is a side view of a trailer attached to a tractor. Fig. 1(B) is an explanatory diagram of the driving section of the tractor. Fig. 1(C) is an explanatory diagram of a power supply path to the control section. [Diagram 2] FIG. 2 is a schematic diagram of the control unit. [Diagram 3] FIG. 3 is an explanatory diagram of the remote control unit. [Figure 4] FIG. 4 is a hydraulic circuit diagram of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the same reference numerals in different drawings indicate parts having the same function, and duplicated descriptions in each drawing will be omitted as appropriate.

[0010] (Example) The embodiment is an example of a transport vehicle in which a trailer 2 equipped with a loading platform 22 (member) is attached to a tractor 1. The present invention also includes transport vehicles such as dump trucks in which the tractor 1 and trailer 2 are not separated. The embodiment is merely one example of a transport vehicle.

[0011] (Trailer outline) Fig. 1 is an explanatory diagram of an embodiment. Fig. 1(A) is a side view of a trailer 2 attached to a tractor 1. In this example, the tractor 1 and the trailer 2 together form a transport vehicle. Incidentally, the trailer 2 can be a transport vehicle even if it is not connected to the tractor 1. A trailer 2 is attached to a tractor 1. Hazard lamps 21 are provided in a pair on the left and right sides of the front of the tractor 1, a pair on the left and right sides of the rear of the tractor 1, and a pair on the left and right sides of the rear of the trailer 2. The trailer 2 has a loading platform 22 (member), and a rear gate 23 (member) behind the loading platform 22 (member). Under the base of the trailer 2, a control unit 3 and a drive source 4 accommodating an electric motor 41 (not shown), a hydraulic pump 42 (not shown), and the like are attached.

[0012] (Drive section) 1(B) is an explanatory diagram of the driving section 11 of the tractor 1. The driving section 11 is equipped with a hazard lamp switch 12 or a parking light switch, as well as driving operation devices such as a steering wheel, brake, and accelerator. It is also equipped with a warning light 13 that warns of danger with light and an alarm 14 that warns of danger with sound. The warning light 13 and the alarm 14 will be described in detail later.

[0013] (Power supply to control unit) 1(C) is an explanatory diagram of a power supply path to the control unit 3. The control unit 3 receives power supply from a power transmission line 211 that turns on the hazard lamps 21. The power transmission line 211 branches into a branch power transmission line 212 near the control unit 3. The branch power transmission line 212 has a connection terminal 213 attached thereto, and can be connected to the connection terminal 213 on the side of the control unit 3. In this way, the control unit 3 receives power supply from the power transmission line 211 that turns on the hazard lamps 21. Therefore, the control unit 3 is configured such that power is not supplied unless the hazard lamp switch 12 in the driving unit 11 is pressed.

[0014] The control unit 3 will be described in detail later, but the control unit 3 controls the driving of the drive source 4, the dump cylinder 51 (driving device 5), and the rear gate cylinder 52 (driving device 5). Therefore, the control unit 3 does not function at all unless the hazard lamp 21 is turned on. The control unit 3 functions only when the hazard lamp 21 is turned on and power is supplied from the power transmission line 211.

[0015] (Hazard lights off) The worker starts the inspection work with the hazard lamps 21 turned off. Even if another worker tries to operate the control unit 3 to drive the drive device 5, the control unit 3 will not function, so the worker can work safely.

[0016] (When hazard lights are on) When an operator attempts to operate the dump cylinder 51 (driving device 5), he or she turns on the hazard lamps 21. When the hazard lamps 21 are turned on, the control unit 3 receives power supply from the power transmission line 211 via the branch power transmission line 212, and the dump cylinder 51 (driving device 5) can be operated. As described above, the embodiment can ensure safety.

[0017] (Control unit) 2 is a schematic diagram of the control unit 3. As described above, the control unit 3 has a branch power transmission line 212 equipped with a connection terminal 213 so as to receive power from a power transmission line 211. The main switch 31 is a switch that starts up the control unit 3. The control unit 3 does not start up immediately just by receiving a supply of power from the power transmission line 211. The control unit 3 starts up when the main switch 31 is turned on. When the hazard lamps 21 are off, the control unit 3 does not start up even if the main switch 31 is turned on because there is no power supplied from the power transmission line 211.

[0018] (Operation unit) The embodiment includes two types of operation units, a dump cylinder operation switch 33 (operation unit) and a rear gate operation switch 34 (operation unit) that drive the drive device 5. It goes without saying that the number of operation units increases proportionately as the number of types of drive device 5 increases.

[0019] The dump cylinder operation switch 33 (operation unit) has a neutral position 331 in the middle, which can be used to keep the dump cylinder 51 (drive device 5) from moving. When the dump cylinder operation switch 33 (operation unit) is tilted to the right, it becomes a dump cylinder extended position 332 (bed lift) and the bed 22 (member) starts to rise. When the dump cylinder operation switch 33 (operation unit) is tilted to the left, it becomes a dump cylinder retracted position 333 (bed lowered) and the bed 22 (member) starts to descend. The dump cylinder operation switch 33 (operation unit) is biased by a spring or the like so that it is always in the neutral position 331. Therefore, when the operator releases his / her hand from the dump cylinder operation switch 33 (operation unit), it returns to the neutral position 331 and the ascent or descent stops. Since the dump cylinder 51 (drive device 5) moves only when the worker is constantly operating the dump cylinder operation switch 33 (operation unit), this is extremely safe.

[0020] The rear gate operation switch 34 (operation unit) has the same configuration as the dump cylinder operation switch 33 (operation unit), and the rear gate cylinder 52 (drive device 5) will not move unless an operator operates it manually.

[0021] In the embodiment of Fig. 2, the operating part is a lever-like one for the sake of explanation, but the operating part may also be a push button. There is a rear gate opening button that opens the rear gate 23 (member) and a rear gate cylinder closing button that closes it, and when both buttons are pressed, an open or close signal is sent to the rear gate cylinder 52 (drive device 5). Both buttons incorporate an elastic member such as a spring, and are configured to switch on when pressed with force and return to their original position when released.

[0022] (Antenna, communication unit, communication switch) The communication switch 32 is a switch for communicating with a remote control unit 6 (described later) from an antenna 35 (communication section). When the communication switch 32 is turned on, transmission and reception with the remote control unit 6 is possible. When opening the rear gate 23 (component) to raise the loading platform 22 (component) and unload the loaded grains, etc., a worker may want to check for safety from behind. Conventionally, the only way to operate this is to use the operating part of the control unit 3, and the worker could only operate it from the location of the control unit 3. The remote control unit 6 eliminates this restriction, allowing the worker to operate the drive unit 5 from anywhere. The worker moves to a position where safety can be confirmed and operates the drive unit 5 with the remote control unit 6.

[0023] (Remote Control Unit) FIG. 3 is an explanatory diagram of the remote control unit 6. As shown in FIG. The start switch 61 is of a sliding type, and is turned ON when the protrusion 611 is moved to the left, and is turned OFF when the protrusion 611 is moved to the right. The remote control unit 6 is small enough to fit in the palm of the hand, and can be placed in the worker's pocket. Because the start switch 61 is a sliding switch, unlike a push button switch, it is designed to prevent the start switch 61 from being turned ON unintentionally even when placed in the pocket.

[0024] The remote control unit 6 is equipped with a dump cylinder control switch 62 (control section) and a rear gate cylinder control switch 63 (control section), which are push button switches. As described above, a push button switch incorporates a resilient member such as a spring, and is configured so that when pressed with force, the switch turns on and when released, returns to its original position.

[0025] (multiple safety) Since the remote control unit 6 is stored in the operator's pocket, it is prone to malfunction, such as the push buttons of the dump cylinder control switch 62 (control section) and the rear gate cylinder control switch 63 (control section) being pressed in the pocket.

[0026] The first safety measure is the hazard lamp switch 12 in the driving unit 11. The control unit 3 cannot receive power supply via the power transmission line 211 unless the hazard lamp switch 12 is turned ON.

[0027] The second safety measure is the main switch 31 of the control unit 3. The control unit 3 will not start up unless the main switch 31 is turned on.

[0028] The third safety measure is the communication switch 32 of the control unit 3. Communication with the remote control unit 6 is not possible unless the communication switch 32 is turned on.

[0029] The fourth safety measure is the start switch 61 of the remote control unit 6. Unless the start switch 61 is turned ON, the remote control unit 6 will not function.

[0030] The fifth safety measure lies in the structure of the dump cylinder operation switch 33 (operation section) and the rear gate operation switch 34 (operation section) of the control section 3, and the dump cylinder operation switch 62 (operation section) and the rear gate cylinder operation switch 63 (operation section) of the remote control unit 6. The structure of the operation unit or the steering unit is such that if it is not pressed continuously, it will return to the neutral position 331 and the members such as the loading platform 22 (member) and the tailgate 23 (member) will not move. If you release your hand from the operation unit or the steering unit, the members will immediately stop moving.

[0031] Only after completing all of these operations can the operator operate the robot using the remote control unit 6.

[0032] (The 6th safety net) 1(B) will be described. When the hazard lamp switch 12 is turned OFF while the main switch 31 of the control unit 3 is ON, the warning light 13 lights up to warn the worker. Furthermore, the alarm 14 sounds and a voice prompts the worker to turn OFF the main switch 31 of the control unit 3.

[0033] (Hydraulic circuit) The driving source 4 in the embodiment employs hydraulic pressure. The electric motor 41 receives power from a battery mounted on the trailer 2 or the tractor 1. The electric motor 41 drives the hydraulic pump 42, pressurizes the oil in the hydraulic tank T, and sends hydraulic pressure to the dump cylinder switching valve 44 and the rear gate cylinder switching valve 45. The dump cylinder switching valve 44 and the rear gate cylinder switching valve 45 open a flow path from the hydraulic pump 42 to the dump cylinder 51 (driving device 5) and a flow path from the dump cylinder 51 (driving device 5) back to the hydraulic tank T by moving a solenoid. The dump cylinder switching valve 44 and the rear gate cylinder switching valve 45 are biased by a spring so as to be in the neutral position 331 of the switching valve 42, and always return to the neutral position 331 when the solenoid is not operating. When the switching valve 42 is in the neutral position 331, the oil pressurized by the hydraulic pump 42 is discharged into the hydraulic tank T if the pressure exceeds the set pressure of the relief valve 43. The driving source 4 is not limited to hydraulic power and may be electric power as appropriate.

[0034] When the trailer 2 attached to the tractor 1 is used as a transport vehicle, the drive source 4 and the control unit 3 may be located in the tractor 1.

[0035] The solenoids of the dump cylinder switching valve 44 and the rear gate cylinder switching valve 45 are operated in response to the operation of the dump cylinder operation switch 33 (operation section) and the rear gate operation switch 34 (operation section) of the control section 3. Also, the worker can turn on the communication switch 32 of the control section 3 to perform operations using the remote control unit 6. The worker turns on the start switch 61 in the remote control unit 6 to start up the remote control unit 6. Then, the worker can operate the dump cylinder control switch 62 (control section) and the rear gate cylinder control switch 63 (control section) to operate the solenoids of the dump cylinder switching valve 44 and the rear gate cylinder switching valve 45.

[0036] (Effects of the embodiment) As described above, the embodiment is provided with multiple safety measures, making it possible to prevent accidents from occurring.

[0037] Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention also includes design changes and the like that do not deviate from the gist of the present invention. Furthermore, the above-described embodiments can be combined by utilizing the technologies of each other, so long as there are no particular contradictions or problems in the purpose, configuration, and the like. [Explanation of symbols]

[0038] 1 Tractor 11 Driving Department 12 Hazard lamp switch 13 Warning light 14 Alarm 2 Trailer 21 Hazard lights 211 Power Lines 212 Branch Transmission Line 213 Connection terminal 22 Cargo platform (component) 23 Rear gate (component) 3. Control Unit 31 Main switch 32 Communication Switch 33 Dump cylinder operation switch (operation part) 331 Neutral position 332 Dump cylinder extended position (bed raised) 333 Dump cylinder retracted position (load platform lowered) 34 Rear gate operation switch (operation part) 35 Antenna (Communication section) 4. Power Source 41 Electric motor 42 Hydraulic pump 43 Relief valve 44 Dump cylinder switching valve 45 Rear gate cylinder switching valve 5. Drive unit 51 Dump cylinder (drive unit) 52 Rear gate cylinder (drive unit) 6 Remote Control Unit 61 Start switch 611 Protrusion 62 Dump cylinder control switch (control section) 63 Rear gate cylinder control switch (control section) T Hydraulic Tank

Claims

1. The device includes a drive unit, a control unit, and an operation unit. The driving device moves a member, The control unit is operated by receiving power from a branch power line branched from a power line for a hazard lamp or a parking lamp, and has the operation unit. The transport vehicle, wherein the operating unit operates the operation of the drive device.

2. 2. The transport vehicle according to claim 1, wherein the drive device is a dump cylinder and / or a tailgate.

3. 2. A transport vehicle according to claim 1, wherein the drive unit is hydraulically driven.

4. It also has a remote control unit, 2. The transport vehicle according to claim 1, wherein the remote control unit is provided with a communication section that communicates with the control section, and the operation of the drive device is controlled by operating the operation section of the remote control unit via the control section.

5. 5. The transport vehicle according to claim 4, wherein the control section further comprises a communication switch for turning on / off communication with the remote control unit.

6. The transport vehicle of claim 4, wherein the operating section of the control section and / or the steering section of the remote control unit is provided with an activation switch for operating the drive device, and the drive device is operated by pressing and holding the activation switch.

7. The transport vehicle according to any one of claims 1 to 6, wherein the transport vehicle is a trailer.

8. The transport vehicle according to any one of claims 1 to 6, wherein the transport vehicle is a trailer attached to a tractor.

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