JPH04121999U - Start/stop control device for aerial work equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To easily and reliably start the engine, which is the drive source of an aerial working machine, by operating a switch on either the platform side or the work platform side of the aerial working machine. [Structure] The start/stop control device 10 includes a vehicle body side control alternate switch 1 and a work platform side control alternate switch that are switched between two operating positions to instruct the machine platform and workbench to start and stop the engine EC. 2 are installed respectively, and when either one of these control alternate switches 1 and 2 is switched while the engine EC is stopped, regardless of the operating position of the other, the engine EC is started, and the engine EC is started. When the switching operation is performed while the EC is in operation, the engine EC is configured to be stopped.

Description

[Detailed explanation of the idea]

0001

[Conventional technology]

The present invention relates to an aerial work machine equipped with a work platform that can be raised and lowered, and furthermore, Start/stop control device for starting and stopping the engine, which is the drive source of work equipment. related.

0002

[Industrial application field]

When working in high places such as construction work, for example, place this product on the chassis (machine platform). A system for boarding workers that is raised and lowered by a boom that can be raised, extended, and retracted with respect to the chassis. An aerial work vehicle (aerial work machine) equipped with a platform is often used. By the way, follow Since then, the starting of the engine, which is the drive source of the above-mentioned aerial work vehicle, has been carried out by the vehicle body and the and attached to the work platform, and can be used by workers on the ground and on the work platform. When either the vehicle body side start switch or the work platform side start switch is turned on, The above engine stops are also carried out by the vehicle body and workbench, respectively. Either the vehicle body side stop switch or work platform side stop switch installed on It was supposed to be done by clicking the button.

0003

[Problem that the idea aims to solve]

However, each of the above stop switches is turned on independently, and the switch is turned on independently. If the stop switch that has been turned on is not turned off, either start switch will be turned on. The engine could not be started even if the engine was turned on. For this reason, e.g. At the end of each round of work, the engine was stopped by turning on the stop switch on the vehicle body. However, the worker who forgot this and got on the workbench got down to the ground and looked at the car body. Avoid the hassle of having to turn off the side stop switch and get on the workbench again. There is a problem that it must be done. Also, if you get on the workbench without knowing the previous stop operation, Workers, especially those who are using the aerial work vehicle for the first time, should be careful not to turn off the stop switch on the work platform side. The engine will not start no matter how many times you operate the start switch on the workbench or the workbench. There were cases where it was mistakenly assumed that there was some kind of malfunction in the engine, etc.

0004 This invention was made in view of such circumstances, and it The engine of the aerial work equipment can be easily and reliably activated by operating the switch in any of the cases. The purpose of this invention is to provide a start/stop control device for aerial work equipment that can be started. do.

[0005]

[Means to solve the problem]

In order to achieve the above purpose, the start/stop control device of the present invention is designed to There are two operating positions on the stand to instruct the start and stop of the engine, which is the drive source of the aerial work equipment. The vehicle body side control alternating switch and the workbench side control alternating switch are switched between one of these controlled alternate switches. Either one can operate the switching operation while the engine is stopped, regardless of the operating position of the other. If the engine is switched on, start the engine, and do not operate the switch while the engine is running. The configuration is such that the engine is stopped when this occurs. In addition, the machine and work The engine is operated to instruct the engine to stop, and then automatically returns to its original state. the vehicle body side stop momentary switch and the work platform side stop momentary switch. Each is attached to the workbench and operated to instruct the engine to start. Attach a start switch on the work platform side and operate the aerial work equipment including the engine. supplying the control unit that controls the power necessary for the control unit to operate. It is equipped with a power supply switching means that operates to switch between power supply and cutoff. When either one of the stop momentary switches is operated, the power supply switching means switches to the cut-off side and operates, and when the work platform start switch is operated, the power is turned off. The supply switching means may be configured to switch to the supply side.

[0006]

[Effect]

With the former start/stop control device, when the engine is running, When the stand side control alternating switch is operated, the engine will stop. , the next time the engine is started, it must be activated to stop the engine. any of the two controlled alternate switches The start is performed by switching the control alternating switch. Ru. In addition, with the latter start/stop control device, when the engine is running, Or the power supply can be switched by operating the stop momentary switch on the workbench side. The means switches to the cut-off side and the operation of the control unit stops, but on the other hand, the The stop momentary switch automatically returns to its original state (i.e. power to the control unit When starting the engine next time, , the power supply switching means switches to the supply side simply by operating the workbench side start switch. The control unit, that is, the engine, is started.

[0007]

【Example】

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, an aerial work vehicle (aerial work machine) equipped with a start/stop control device according to the present invention. This will be explained using FIG. This aerial work vehicle 30 has a rear part on the vehicle body 31 that can automatically rotate relative to the vehicle body 31. The swivel table 32 is equipped with a swivel table 32, and on the top of the swivel table 32, there is a block configured to be able to expand and contract. A workbench 35 is attached to the tip of the boom 33 so that it can be raised and lowered. It becomes attached. Note that each operation of the swivel base 32 and boom 33 is carried out by mounting on the vehicle body 31. This is carried out using the hydraulic pressure generated by the mounted hydraulic pump P. Also, the oil The pressure pump P is driven by the engine E, which is the driving source of the aerial work vehicle 30. Engine E has an engine controller that controls the operation of engine E. The power necessary for its operation is supplied from battery B via La EC (see Figures 1 and 2). be done. In addition, each operation control of the swivel base 32 and the boom 33 (i.e., hydraulic pressure supply control) ) is performed in accordance with the operation of the boom controller 38 provided on the workbench 35, The boom controller 38 also receives power for operation from the battery B. . Note that the engine controller EC and the boom controller 38 are defined in claim 2. This corresponds to the "control unit".

[0008] According to the aerial work vehicle 30 configured in this way, the worker on the work platform 35 operates the swivel base 32 and boom 33 through the operation of the boom controller 38 ( Hereinafter, for convenience, the boom 33 is collectively referred to as the operation). 5 and can move to any height.

[0009] By the way, this aerial work vehicle 30 has either a vehicle body 31 side or a work platform 33 side. The engine E can be started or stopped at any time. -Equipped with a stop control device. Hereinafter, the start/stop control device according to claim 1 The starting/stopping control device according to claim 2 is explained in Example 1, and the start/stop control device according to claim 2 is explained in Example 2. I will clarify.

0010 (Example 1) The start/stop control device 10 shown in FIG. , workbench side control alternate switch 2, latching relay 3, and latching It is composed of a relay control relay 4.

[0011] Vehicle side control alternate switch 1 and workbench side control alternate switch 2 are respectively attached to the vehicle body 31 and the workbench 35, and are used to start and stop the engine E. It is operated to switch between two operating positions to instruct. Here, each control alternate Switches 1 and 2 supply power from battery B to the boom controller 38. upper power supply switching parts 1a and 2a for opening and closing the upper power supply line 6 for , in conjunction with the upper power supply switching parts 1a and 2a, the power of battery B is switched on. , opening of the engine power line 7 for supplying to the engine controller EC. It is comprised of engine power changeover switch parts 1b and 2b that perform closing. upper part Between the respective operation position terminals in the power supply changeover switch parts 1a and 2a, that is, the first operation The position terminals 1c and 2c and the second operating position terminals 1d and 2d are connected, respectively. The upper power supply line 6 is electrically connected through any of the connection lines. . On the other hand, the first operation position terminal 1 in the engine power changeover switch parts 1b and 2b e and 2e and second operation position terminals 1f and 2f are connected, respectively, and the above The engine power line 7 is electrically connected through any of the connection lines.

0012 The latching relay 3 is connected to a supply branched from the engine power line 7. The relay coil 3a is separate from the upper power line 6 and engine power line 7. A stop relay coil 3 is installed on an independent power supply line 8 connected to battery B. b, and a switch 3c. Note that the switch 3c is a supply relay. - When the coil 3a is energized, the upper power line 6 and the independent power line 8 are When the stop relay coil 3b is energized, it is located at the supply position to be connected to the relay B. is located at the stop position to cut off both power lines 6 and 8 from battery B. .

[0013] The latching relay control relay 4 is branched from the upper power supply line 6 and connected. a control relay coil 4a that opens and closes the independent power supply line 8, and a switch 4b that opens and closes the independent power supply line 8. Consisting of Note that the switch 4b operates as described above when the control relay coil 4a is de-energized. It is in a closed state to make the vertical power line 8 conductive, and the control relay coil 4a is energized. When this occurs, the power supply line 8 is opened to cut off the power supply line 8.

[0014] In the start/stop control device 10 configured as described above, for example, the vehicle body side control alternator Both the output switch 1 and the workbench side control alternate switch 2 are the first operation. When operated to position (1c, 1e and 2c, 2e), first turn on the engine power lamp. In7 becomes conductive. Therefore, the supply relay coil 3a of the latching relay 3 is excited, and the switching element 3c is located at the supply position. This allows the upper power line 6 is also conductive, the control relay coil 4a is energized, and the switch 4b is opened. The independent power supply line 8 is cut off. For this reason, for stopping the latching relay 3, Relay coil 3b is not excited. In this way, the boom controller 38 and the engine By supplying power from battery B to engine controller EC, When the engine E is started, the operation of the boom 33 can also be controlled. During operation of such an aerial work vehicle 30, the control alternate switches 1 and 2 are is switched to the second operating position (1d, 1f or 2d, 2f). When the engine power line 7 is shut off (this is called a stop operation), the engine power line 7 is cut off, and the The supply relay coil 3a of the ching relay 3 becomes de-energized. Along with this, the top The power supply line 6 is cut off, the control relay coil 4a becomes de-energized, and the switch 4 When c returns to the closed state, the independent power supply line 8 becomes conductive. For this reason, for stopping The relay coil 3b is excited and the switch 3c is switched to the stop position. In this way Power supply to engine controller EC and boom controller 38 is stopped. As a result, the engine E stops and the boom 33 also becomes uncontrollable.

[0015] Next, in order to start the aerial work vehicle 30, the front stop operation must be performed by both control alternators. Regardless of whether the switch 1 or 2 was switched, any control switch All you have to do is switch the alternate switch. Either control alternate switch Even if the switch is switched, the upper power line 6 and the engine power line 7 will not be connected. This is because the switching element 3c can be located on the supply side.

[0016] (Example 2) The start/stop control device 20 shown in FIG. 2 includes a vehicle body side stop momentary switch 21 , the workbench side stop momentary switch 22, and the workbench side start momentary switch 22. It consists of a latch 24 and a latching relay 23.

[0017] Vehicle side stop momentary switch 21 and work platform side stop momentary switch 22 are respectively attached to the vehicle body 31 and the workbench 35, and are used to stop the engine E. A push operation is performed to give an instruction. Here, each stop momentary switch 21, 22 is , an upper power supply for supplying power from battery B to the boom controller 38 The upper power supply switch opens and closes the line 26 (opens when pressed). Interlocked with the switch parts 21a, 22a and the upper power supply switching parts 21a, 22a. Then, each battery B is independently connected to the stop relay control of the latching relay 23. Vehicle side stop power line 2 connected to the power line 23b (this will be described later) 8a and workbench side stop power line 28b (closed during push operation) The stop power changeover switch section 21b and 22b are configured as follows. In addition, As the name suggests, the double stop momentary switch 21 is released from push operation and remains unoperated. When the operating state is reached, it will automatically return to its original state (upper power supply switching sections 21a and 22a). is in the closed state, and the stop power changeover switch portions 21b and 22b are in the open state. state).

[0018] The workbench side starting momentary switch 24 transfers power from battery B to engine E. The engine controller EC controls the operation of the engine. It is provided to open and close the engine power line 27, and when it is pressed, the power line The power supply line 27 is closed to make the power line 7 conductive, and the power supply line 27 is shut off when the power supply line 27 is not operated. automatically returns to the open state to disconnect.

[0019] The latching relay (power supply switching means) 23 is connected to the engine power line 27. The supply relay coil 23a is connected to the supply relay coil 23a branched from the A stop relay cord connected to the source line 28a and the workbench side stop power line 28b. It is composed of a switch 23b and a switch 23c. In addition, the switch 23c is , when the supply relay coil 23a is excited, the upper power supply line 26 and both stops. The power supply lines 28a and 28b are located at the supply position to connect them to battery B, and then stopped. When the relay coil 3b is excited, these power lines 26, 28a, 28b is located at the stop position to disconnect battery B from battery B.

[0020] In the start/stop control device 20 configured as described above, when the engine E is stopped, Then, connect the vehicle body side stop momentary switch 21 and the work platform side stop momentary switch 21. Press the work platform side start momentary switch 24 when both switches 22 are not operated. When operated, the engine power line 27 is made conductive. This allows the latching grille to -23 supply relay coil 23a is energized and switch 23c is placed in the supply position. place Therefore, the upper power supply line 26 is also rendered conductive. Thus the boom control Power from battery B is supplied to controller 38 and engine controller EC. As a result, engine E (height work vehicle 30) is started and the boom is 33 can also be controlled. During operation of such an aerial work vehicle 30, both stop momentary switches 21 , 22 is pushed (stopped), first the upper power supply light is turned off. At the same time, the stop momentary switch that was operated to stop is turned off. The disposed stop power line (28a or 28b) is connected, and the latching relay 3 The supply relay coil 3a is excited, and the switch 23c is switched to the stop position. In this way, power is supplied to the engine controller EC and the boom controller 38. By stopping the supply, the engine E is stopped and the boom 33 is also rendered inoperable. Ru.

[0021] Next, when starting the aerial work vehicle 30, regardless of the front stop operation, The side starting momentary switch 24 may be pressed (starting operation). Each stop mode - Since the mental switches 21 and 22 have returned to their original state after the front stop operation, the upper This is because the switch 23c can be placed in the supply position only by the starting operation. be.

[0022] As described above, the start/stop control devices 10 and 20 as described in Embodiments 1 and 2 are provided. In particular, this allows the operator on the workbench 30 to start the engine E from a stopped state. When operating, the workbench side control alternate in the start/stop control device 10 switch 2 or the work platform side starting momentary switch in the start/stop control device 20. It can be started easily and easily by simply operating the switch 24, unlike conventional It is possible to prevent trouble and suspicion of failure from occurring.

[0023]

[Effect of the idea]

As described above, if the start/stop control device of the present invention is used, the drive source of aerial work equipment can be While the barrel engine is running, the vehicle body side control alternating switch and work platform side control switch Stop the engine by switching one of the alternating switches. On the other hand, the stop operation can be performed by either control alternating switch. Regardless of whether the operation of the By switching, you can reliably start a stopped engine. . Also, while the engine is running, do not use the momentary stop switch on the vehicle body side or the stop switch on the work platform side. Stop the control unit by operating one of the stop momentary switches. The engine can be stopped by operating the platform side start switch. Ensuring that a stopped engine can be started by simply starting the control unit. I can do it. Therefore, it is possible to achieve an aerial work machine that is extremely easy to handle compared to conventional methods. The burden on the worker can be reduced.

[Brief explanation of drawings]

FIG. 1 is an electrical circuit diagram of a start/stop control device according to the present invention.

FIG. 2 is an electrical circuit diagram of a start/stop control device according to the present invention.

FIG. 3 is a perspective view of an aerial work vehicle equipped with the start/stop control device.

[Explanation of symbols]

1 Vehicle side control alternate switch 2 Workbench side control alternate switch 3,23 Latching relay 4 Latching relay control relay 21 Vehicle side stop momentary switch 22 Work platform side stop momentary switch 24 Work platform side starting momentary switch 35 Workbench 38 Boom controller EC engine controller

Claims (2)

[Scope of utility model registration request] Claim 1: A method for starting and stopping an engine, which is the drive source of an aerial working machine, which is equipped with a work platform on the platform that can be raised and lowered with respect to the platform. A stop control device includes a vehicle body side control alternate switch and a work platform side control alternate switch that are attached to the machine base and the work bench, respectively, and are operated to switch between two operation positions to instruct starting and stopping of the engine. Regardless of the operating position of the other one, when either one of these control alternate switches is operated while the engine is stopped, the engine is started, and when the engine is running, 1. A start/stop control device for an aerial work machine, characterized in that the start/stop control device for an aerial work machine is configured to stop the engine when the switching operation is performed. Claim 2: A method for starting and stopping an engine, which is the drive source of an aerial working machine, which is equipped with a work platform on the platform that can be raised and lowered with respect to the platform. A stop control device includes a vehicle body side stop momentary switch and a work platform side stop switch that are respectively attached to the machine base and the work platform and are operated to instruct the engine to stop, and then automatically return to the original state. a momentary switch, a workbench-side start switch that is attached to the workbench and is operated to instruct the start of the engine, and a control unit that controls the operation of the aerial work machine including the engine; and a power supply switching means that operates to switch between supplying and cutting off the power necessary for the operation of the switch, and when either of the stop momentary switches is operated, the power supply switching means is operated. A method for starting and operating an aerial working machine, characterized in that the power supply switching means is configured to switch to the cut-off side and to operate to the cut-off side, and when the work platform side start switch is operated, the power supply switching means to switch to the supply side and operate. Stop control device.