JP2551239Y2 - Battery power supply circuit 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 battery power supply circuit for an aerial work vehicle.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional aerial work vehicle A of this type, which is shown in FIG. The aerial work vehicle A is turned on a vehicle 1 such that the turntable 2 can rotate freely.
A boom 3 pivotally supporting a base end thereof, an up-and-down boom 3, an up-and-down cylinder 4 disposed between the boom 3 and the swivel base 2 to raise and lower the boom 4, and a worker boarding bucket arranged at a tip end of the boom 3. 5 is provided. The boom 3 is composed of a base boom 6, an intermediate boom 7, which is sequentially inserted into the base boom 6, and a leading boom 8, and an appropriate telescopic drive device is provided between the respective booms. , The boom 8 ahead of the intermediate boom 7 can be extended and contracted.

Such an aerial work vehicle A has an engine 9 and a battery 10 mounted on the swivel 2. As shown in FIG. 2 , a start circuit 11 for starting the engine 9 with the power supply of the battery 10 and a power generation circuit 12 for charging the battery 10 with the power of the engine 9 are provided. The power from the battery 10 is supplied to the engine maintenance circuit unit 14 via a key switch 13 (corresponding to the main switch described in the utility model registration claims).
And other power supply circuits 15.

[0004] The engine maintenance circuit section 14
It is an electric circuit portion necessary for rotating the engine 9 and includes other circuits 17 such as an engine stop solenoid 16 and a fuel injection electromagnetic pump. Other power supply circuit section 15, the end of the power supply circuit of the aerial platforms A
A power supply circuit excluding the gin maintenance circuit section 14, which is an upper operation device 18 disposed on the bucket 5, a lower operation device 19 disposed on the swivel 2, and operations from the upper operation device 18 and the lower operation device 19. Upon receiving the signal, a control signal is output to various control devices 21 of the aerial work vehicle A via the controller 20.

The key switch 13 is in the OFF position, ON
There are three positions, a start position and a start position. In the start position, when the hand is released from the switch, the switch is turned on. The key switch 13 is composed of two circuit switches, one of which is set to the ON position and S
Power is supplied from the battery 10 to the engine maintenance circuit section 14 and the other power supply circuit section 5 at the TART position. Another circuit is configured to supply power from the battery 10 to the start circuit 11 for starting the engine 9 at a START position.

The starting circuit 11 includes a starter 22 that rotates the engine 9 and a starter relay 23 that receives a signal from the key switch 13 and supplies power from the battery 10 to the starter 22. Therefore,
When the key switch 13 is set to the START position, the starter 2
2, the engine 9 can be started.

The aerial work vehicle A has a START switch 24 and an engine stop switch 25 on the bucket 5 so that the engine 9 can be started and stopped also from the bucket 5.
It has. That is, when the START switch 24 is operated, the state becomes the same as the state where the key switch 13 is set to the START position. When the engine stop switch 25 is operated, the b contact 27 of the relay 26
Is opened and the battery 10 is connected to the engine stop solenoid 16.
The power supply from is cut off . The engine stop solenoid 16 supplies fuel to the engine 9 by constantly energizing the engine 9 while the engine 9 is rotating. When the energization is stopped, the engine stop solenoid 16 cuts the fuel and stops the rotation of the engine 9. I have.

The aerial work vehicle A thus configured is
It is operated as follows. That is, first, the key switch 13 is moved from the OFF position to the ON position on the swivel base 2 to be in the START position, and the engine 9 is started. When operating the aerial platform vehicle A from the swivel 2, the lower operating device 19 is operated, and when operating on the bucket 5, the upper operating device 18 is operated to operate the aerial platform at each position. This is for operating the car A.

When the engine 9 is stopped on the bucket 5, the engine stop switch 25 is operated to stop the rotation of the engine 9. When the engine 9 is started again, the start switch 24 is operated to operate the engine 9. Start 9 When stopping the engine 9 on the swivel 2, the key switch 13 is operated to the OFF position to stop the engine 9.

[0010]

However, the battery power supply circuit of the aerial work vehicle configured as described above has the following problems. That is, it is assumed that the operation on the bucket 5 becomes longer, and the engine 9 is operated by operating the engine stop switch 25 to stop the operation. At this time, the key switch 13 may be turned off to prevent the battery 10 from discharging.
3, swivel base 2 on the arrangement and what they do we work who are are those that directly carry out the work. Then, the worker who was in the bucket 5 may sometimes be required to take the bucket 5 depending on the content of the work.
In some cases, the worker may move to a higher working position. After that, when the work is completed and descends from the elevated position to the ground, the worker forgets that he / she has moved to the elevated position by the elevated work vehicle A, and descends from another place to the ground and A was sometimes left as it was.

Particularly, in this case, the high-altitude work vehicle A is almost always left overnight. At this time, the aerial work vehicle A was left with the key switch 13 turned on, and the power from the battery 10 was supplied to the engine main body.
Tenth circuit part and other power supply circuit part 15
, The battery 10 is discharged, and even if the user tries to work on the aerial work platform A again, the engine 9
There was a problem that the engine could not be started.

An object of the present invention is to provide a battery power supply circuit for an aerial work vehicle in which the above trouble does not occur.

[0013]

In order to achieve the above object, a battery power supply circuit for an aerial work vehicle according to the present invention comprises:
An aerial work vehicle equipped with a boom that can be raised and lowered on the vehicle and a bucket at the tip of the boom. An engine and a battery are mounted on the vehicle, and a starting circuit and a battery that start the engine with the battery power supply. The power station is equipped with a power generation circuit that uses a power source that generates power by the power of the engine, and supplies power from the battery to each power supply destination of the high work vehicle via a main switch arranged on the vehicle. A battery power supply circuit for a work vehicle ,
In a battery power supply circuit for an aerial work vehicle that enables start and stop operations of an engine from the bucket, an engine maintenance circuit unit and a power supply destination circuit required to rotate the engine from a power supply destination from a battery. And an engine rotation stop detecting means and a control unit for shutting off those circuits when the engine rotation stop detecting means detects the rotation stop of the engine, and when starting the engine from the bucket, the power from the battery is supplied. The engine is supplied to the starting circuit and the engine maintenance circuit, and during the rotation of the engine, power from a battery is supplied to the engine maintenance circuit and other power supply destination circuit via the main switch and the control unit. Characterized in that it is configured to be supplied to

[0014]

In the battery power supply circuit of the aerial work vehicle constructed as described above, when the rotation of the engine is stopped, the engine rotation stop detecting means detects the stop of the rotation of the engine and the circuit of the control unit. Therefore, power from the battery is not supplied to the engine maintenance circuit section and other power supply destination circuit sections. Also, when starting the engine from the bucket,
Power from a battery can be supplied to the starting circuit and the engine maintenance circuit unit regardless of the control unit, and the engine can be started. And once because the engine starts engine stop detecting means and connects the circuit of the control unit does not detect the rotation stop of the engine, the power from the battery engine maintainer
It will be supplied to the Nsu circuit portion and the other power supply destination circuit portion.

Therefore, even if the aerial work vehicle is left for a long time with the engine stopped, the battery can be prevented from being discharged, and the engine can be started whenever necessary. Starting from the bucket can be possible.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In describing an embodiment of the present invention, a case where the present invention is applied to an aerial work vehicle A described in the related art will be described below. Accordingly, the reference numerals 1 to 27 shown and described in FIGS. 2 and 3 in the related art are the same in the following description, and the description is omitted using the same reference numerals.

In FIG. 1, reference numeral 28 denotes an engine stop detecting means, which is connected to a self-generator on the rotating shaft of the engine, and the engine 9 rotates when electricity from the generator is generated by the rotation of the engine 9. A signal is output, and when the engine is stopped, no signal is output to detect that the rotation of the engine is stopped. 29
Is a control unit, which cuts off its circuit when a signal indicating that the engine 9 is stopped is received from the engine stop detecting means 28 (when electricity from the generator is not generated). When the stop signal is not received (when electricity from the generator is generated), the circuit is connected.

The circuit shown in FIG. 1 is partially changed from the circuit shown in FIG. 2 as follows. That is, from the ON position of the key switch 13 to the engine
Maintenance circuit section 14 and other power supply circuit section 1
The point that the control unit 29 is interposed in the connection circuit to the battery 5, and the operation of the START switch 23 causes the battery 10
The power supply from the engine
The difference is that the data is also supplied to the nonce circuit unit 14.

Reference numeral 30 denotes a diode, STAR
When the T switch 24 is operated, the power from the battery 10 is turned off .
When the power is supplied to the engine maintenance circuit unit 14 and the power from the battery 10 is supplied to the engine maintenance circuit unit 14 via the control unit 29 at the time of engine rotation, the starting circuit 11 is not operated.

Reference numeral 31 denotes a diode, which supplies power from the battery 10 to the engine maintenance circuit unit 14 via the control unit 29 at the time of engine rotation.
When the TART switch 24 is operated, the power from the battery 10 is prevented from passing through the START switch 24 and being supplied to the other power supply circuit unit 15.

The battery power supply circuit of the aerial work vehicle according to the present invention configured as described above operates as follows. First, the key switch 13 is moved from the OFF position to the ON position on the swivel base 2 to be in the START position and the engine 9 is started. At this time, the power from the battery 10 passes through the START position of the key switch 13 and the starting circuit 11
Is supplied to the engine maintenance circuit section 14, and the engine 9 starts. When the engine 9 starts, the engine stop detecting means 28 does not detect that the engine is stopped, and the control unit 29 connects the circuit. That is, after the engine 9 is started, the key switch 13 is in the ON position, and the power from the battery 10 is supplied to the control unit 2.
After 9 passes, the power is supplied to the engine maintenance circuit section 14 and the other power supply circuit section 15. And engine 9
Is rotating and the power from the battery 10 is the power generation circuit 1.
Because it is supplied while receiving power supply from 2,
Battery 10 does not discharge.

Next, when operating the aerial work vehicle A from the bucket 5, an operator rides on the bucket 5 and operates the upper operating device 18 on the bucket 5 to operate the aerial work vehicle A. Then, since the work at a high place becomes longer, the engine stop switch 25 is operated from above the bucket 5 and the relay 2 is operated.
It is assumed that the power supply to the engine stop solenoid 16 is cut off via 6 and the engine 9 is stopped. Then, the engine stop detecting means 28 detects that the engine is stopped, and the control unit 29 cuts off the circuit. Power from Yotsute battery 10, while the engine 9 is stopped et
The battery 10 is not discharged even if the aerial work vehicle A is left as it is without being supplied to the engine maintenance circuit unit 14 and the other power supply circuit unit 15.

When the engine 9 is restarted on the bucket 5, by operating the START switch 24,
The power from the battery 10 is supplied to the engine maintenance circuit section 14 and the starting circuit 11, so that the engine 9 can be started again. When the engine 9 is started, the above-described state is established, and thus the description is omitted.

As described above, even if the aerial work vehicle is left with the engine stopped for a long time with the key switch 13 being in the ON position, the battery 1
0 was discharged to prevent that would, not if necessary
In any case, the engine 9 can be started from the bucket 5.

In the above embodiment, the key switch 1
Although 3 is used for two circuits described in the prior art, it may be for one circuit. In the above embodiment, the key switch 13 is used as the main switch described in the utility model registration claims. However, the main switch is a switch that opens and closes the battery 10 and the other power supply circuit unit 15. It may be.

Next, the start switch 24 and the engine stop switch 25 are connected by passing the ON position of the key switch 13 (the start and stop operations of the engine 9 cannot be performed on the bucket unless the key switch 13 is set to the ON position). However, it is also possible to connect directly from the battery 10 (operate directly on the bucket 5 without operating the key switch 13).

Further, in the above-described embodiment, the embodiment in which the self-generator connected to the rotating shaft of the engine 9 is used as the engine stop detection means 28 and the detection can be performed without receiving the power supply from the battery 10 for the detection has been described. It may be detected from a circuit such as a tachometer of the engine 9 or lighting of a charging lamp. In this case, if the engine stop detection means 28 must be supplied with electricity to perform detection, the diodes 30, 31
Engine maintenance circuit unit 14 that receives power supply from
What is necessary is just to be supplied from.

[0028]

[Effect of the Invention] The battery power supply circuit of the aerial work vehicle according to the present invention, which is constructed and operates as described above, can be used even when the aerial work vehicle is left for a long time with the engine stopped rotating.
The battery can be prevented from being discharged, and the engine can be started from the bucket whenever necessary, which is very effective.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a battery power supply circuit of an aerial work vehicle according to the present invention.

FIG. 2 is an explanatory view illustrating a battery power supply circuit of a conventional aerial work vehicle.

FIG. 3 is an explanatory diagram illustrating an example of an aerial work vehicle.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 vehicle 3 boom 5 bucket 9 engine 10 battery 11 starting circuit 12 power generation circuit 13 main switch (key switch) 14 engine maintenance circuit section 15 other power supply circuit section 28 engine rotation stop detection means 29 control section A work platform

Claims (1)

(57) [Scope of request for utility model registration] 1. An aerial work vehicle having a boom that can be raised and lowered on a vehicle and a bucket at the tip of the boom, wherein an engine and a battery are mounted on the vehicle, and the engine is started by a power source of the battery. Power generation that uses a power supply that generates power from the engine by charging the starting circuit and battery
Circuit for supplying power from a battery to each power supply destination of the aerial work vehicle via a main switch disposed on the vehicle, the battery power supply circuit for an aerial work vehicle , wherein the bucket In a battery power supply circuit for an aerial work vehicle that enables starting and stopping operations of the engine from above, an engine maintenance circuit and other power supplies necessary for rotating the engine to supply power from the battery. In addition to the supply circuit section, an engine rotation stop detection unit and a control unit that shuts off those circuits when the engine rotation stop detection unit detects the rotation stop of the engine are provided. The power of the starting circuit and the engine
It is configured to supply power to the maintenance circuit section, and to supply power from the battery to the engine maintenance circuit section and other power supply destination circuit sections via the main switch and the control section during rotation of the engine. Characteristic battery power supply circuit for aerial work vehicles.