JPH0375480B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is capable of displacing a gondola attached to the tip of a swinging, undulating, and telescopic boom, and also provides an outrigger for fixing the vehicle body to the ground. Regarding improvements to the hydraulic equipment operating device for aerial work vehicles that can operate the This invention relates to a boom and outrigger hydraulic operating device for an aerial work vehicle.

[Conventional technology]

Conventionally, the aerial work vehicle 1 shown in FIG. A circuit is provided. The operating procedure is to first stop the aerial work vehicle 1 at a predetermined position, and then extend the outriggers 4 installed on the left and right sides of the front and rear of the vehicle body in the lateral and downward direction of the vehicle body. to stabilize it by fixing it to the ground. Next, a turning motor 5a for moving the gondola 3 attached to the tip of the boom 2,
Hydraulic operating devices 5 such as the undulating cylinder 5b and the telescopic cylinder 5c are operated by command levers 6a, 6b, . . . , 7a, 7b, .

When the gondola 3 reaches the desired position due to the displacement of the boom 2, the movement of the boom 2 is stopped and the gondola 3
Carry out designated high-place work. When the work is completed, the boom 2 is displaced and returned to the home position 8 as shown in the figure, and the outriggers 4 are pulled into the vehicle body, and the vehicle is ready to travel.

Pressure oil supply and discharge valves in the hydraulic circuit for displacing the boom and operating the outriggers are independently provided, although not shown. The supply and discharge valves interposed in the hydraulic circuit of the boom are electromagnetic control valves that supply and discharge pressure oil, or electromagnetic proportional control valves that adjust the supply and discharge and the amount of supply and discharge, and are energized to excite the solenoid. The circuit is designed to be opened only by the operating lever of the boom displacement command lever, regardless of the operating state of the outrigger. As a result, the boom can be displaced regardless of the operation of the telescopic cylinder that operates the outriggers, and the outriggers can also be operated regardless of the state of the boom.

[Problem to be solved by the invention]

Incidentally, there are cases where a worker accidentally pulls in the outriggers without the boom being returned to the home position, or displaces the boom without the outriggers securing the vehicle body. In such a case, the support of the car body by the tires alone cannot support the moment generated by the weight of the boom and gondola, resulting in an extremely dangerous situation such as the car body tipping over.

For example, Japanese Patent Application Laid-open No. 57-198149 describes a safety device that avoids the above-mentioned danger by disabling related operations of the boom when the outriggers are not in the extended state. This includes a first electrical contact that is disconnected when the boom is in the home position, and a second electrical contact that is disconnected when the outrigger is extended beyond a certain amount, in an electrical circuit connected in series. A solenoid valve whose ports are switched by supplying power or stopping power supply from the electric circuit is connected between an outrigger switching valve for outrigger operating hydraulic equipment and a boom switching valve for boom operating hydraulic equipment such as a luffing cylinder. It is interposed in the oil passage.
The above-mentioned solenoid valve has two functional positions, and depending on its switching operation, the functional position supplies pressure oil after passing through the outrigger switching valve to the boom switching valve, and the outrigger switching valve The function position is to discharge the pressure oil after passing through the valve into the oil tank without supplying it to the boom switching valve.

Therefore, when the outrigger operating hydraulic equipment is not fully extended, that is, when the vehicle body is not supported by the outriggers, the second electrical contact is in the connected state, and it is possible to accidentally activate the boom operating hydraulic equipment and cause the boom to When the device is removed from the home position, the first electrical contact becomes connected. Since both electrical contacts are energized, the functional position of the solenoid valve is switched, and the pressure oil passing through the solenoid valve is returned to the tank, so that even if the boom switching valve is operated from now on, the boom will not move at all. This is to prevent danger from occurring due to incorrect operation.

However, since the outrigger switching valve is located upstream of the electromagnetic valve, it is possible to supply pressure oil to the outrigger operating hydraulic equipment even though pressure oil is not supplied to the boom operating hydraulic equipment. Therefore, even when the boom is in a position other than the home position, the outriggers supporting the vehicle body can be retracted. The wheels alone cannot support the car body,
Contains drawbacks that can lead to dangerous situations.

On the other hand, due to its mechanical structure, the second electrical contact does not return from the disconnected state to the connected state unless the outrigger is somewhat reduced from the vehicle body supporting state. As a result, if you accidentally start retracting the outriggers while the boom is away from the home position, that is, when the second electrical contact is still disconnected, no matter how much you operate the boom switching valve, the boom Hydraulic equipment does not operate and safety is maintained. However, once the outrigger has contracted to a certain extent, the second electrical contact becomes connected, at which point the boom actuating hydraulic equipment is activated, creating a dangerous situation similar to that described above. Both of these situations occur because, as described above, even if it is possible to restrict the operation of the boom, there is no means for restricting the operation of the outriggers.

Further, a second electrical contact for detecting the support provided by the outrigger is provided near the grounding portion of the outrigger, and is provided at a location where the intrusion of dust and rainwater on the ground is significant. Therefore, if dust gets caught in the second electrical contact and malfunctions, the probability of failure increases and the outrigger may not function adequately as an operation detection switch. That is, if the switch that detects ground contact remains in the ground contact detection state even though the outriggers are retracted, the outriggers are treated as being in the vehicle body support state, and a situation arises in which the boom is activated.

The present invention was made to solve the above-mentioned problem, and its purpose is that the boom cannot be moved unless the vehicle body is fixed to the ground with the outriggers, but when the boom can be moved, that is, To prevent a vehicle body from overturning by preventing the fixation of a vehicle body by outriggers from being released when a boom is not at the home position, and for this purpose, restricting the operation of the outriggers according to the state of the outriggers. In addition, it is possible to restrict the operation of the outriggers according to the condition of the boom, and the switch that detects the operation of the outriggers is less likely to malfunction at the work site. Hydraulic operation of boom and outriggers in aerial work vehicles, which enables the control operation of hydraulically operated equipment of booms and outriggers to be maintained at a high level at all times, while taking into consideration that the incidence of false signals due to the occurrence of false signals is extremely low. The purpose is to provide equipment.

[Means to solve the problem]

The present invention has a boom operating hydraulic device such as a swing motor, a luffing cylinder, and a telescopic cylinder that displaces a gondola provided at the tip of the boom, and an outrigger operating hydraulic device that operates an outrigger for fixing a vehicle body. Applies to work vehicles.

Its features will be explained with reference to FIG. In order to switch the supply of pressure oil to the boom operating hydraulic circuit 12 or the outrigger operating hydraulic circuit 15, the first function position 10A supplies pressure oil only to the boom operating hydraulic circuit 12, and the first function position 10A supplies pressure oil only to the outrigger operating hydraulic circuit 15. An electromagnetic control valve 10 is provided with a second functional position 10B supplying the second functional position 10B.
A boom detecting means 24 (see FIG. 1) detects that the boom 2 has returned to the home position 8, and a manual switching valve 1 is interposed in the outrigger operating hydraulic circuit 15 to command the outrigger 4 to operate.
9 or 28a to 28d (see FIG. 4), valve operation detection means 27 (see FIG. 5) is installed to detect whether or not the solenoid function position is neutral.

The boom switch LS1 becomes connected when the boom detection means 24 detects that the boom 2 is in the home position 8, and the valve operation detection means 27 detects that the manual switching valve 19 is not in the neutral position. When the boom switch LS1 and outrigger switch LS2 are arranged in series, and both switches LS1 and LS2 are in the connected state, the solenoid control valve 10 is set to the first function. A solenoid energizing circuit 11 is provided for switching from position 10A to second functional position 10B.

〔Effect of the invention〕

According to the present invention, depending on whether or not the boom switch and outrigger switch are connected, hydraulic oil is supplied only to either the boom operating hydraulic circuit or the outrigger operating hydraulic circuit, so that the boom is not in the home position. When the outriggers are prevented from operating. When the outriggers are trying to fix the vehicle to the ground, the boom is blocked from operating.
It is possible to prevent the vehicle from rolling over.

Additionally, when the boom is in a position other than the home position, even if an attempt is made to retract the outriggers that are supporting the vehicle body, the electromagnetic control valve will block oil supply to the outrigger operating hydraulic equipment, allowing only the boom to operate. be done.

On the other hand, if the outrigger is released from the vehicle body support state, the valve operation detection means immediately changes the outrigger switch to the connected state. Therefore, if you accidentally start retracting the outriggers while the boom is away from the home position, pressure oil will be supplied through the solenoid control valve only to operate the boom actuating hydraulic equipment, and then the outriggers will be retracted. No matter how much you try to reduce the size, the outriggers will not release their support to the vehicle body, ensuring safety.

In addition, since the valve operation detection means is interposed in a manual switching valve that commands the outriggers to operate, dust, rainwater, etc. cannot enter the valve operation detection means, which may cause the detection means to malfunction or generate erroneous signals. That will no longer be the case. Therefore, it is possible to avoid a situation where the boom is moved due to generation of an erroneous signal even though the outrigger is in a retracted state.

〔Example〕

The present invention will be described in detail below based on examples thereof.

FIG. 2 is a partial hydraulic circuit diagram including a solenoid energizing circuit 11 of a circuit switching electromagnetic control valve 10 in an embodiment of a boom and outrigger hydraulic actuating device for an aerial work vehicle. This supplies pressure oil to the boom operating hydraulic circuit 12 that drives the boom operating hydraulic equipment 5 such as the swing motor 5a, the luffing cylinder 5b, and the telescopic cylinder 5c shown in FIG. 3, or the outrigger operation shown in FIG. Telescopic cylinders 13a to 13d for left and right extension, which are hydraulic equipment 13,
Pressure oil can be supplied to an outrigger operating hydraulic circuit 15 that drives the vertical telescopic cylinders 14a to 14d.

The electromagnetic control valve 10 that switches the supply of pressure oil to the boom operating hydraulic circuit 12 or the outrigger operating hydraulic circuit 15 is connected to the electromagnetic proportional control valves 16 to 18 of the respective circuits 12 and 15, the outrigger telescopic manual switching valve 19, and the hydraulic pump 20. is established between. This electromagnetic control valve 10 is in a first functional position 10A that supplies pressure oil only to the boom operating hydraulic circuit 12.
and a second function position 10B that supplies pressure oil only to the outrigger operating hydraulic circuit 15. The solenoid energizing circuit 11 for exciting the 10 solenoids 10a of the electromagnetic control valves with electric power from the power source 21 includes a boom switch that operates when it detects that the boom has returned to the home position.
When it is detected that LS1 and the outrigger telescopic manual switching valve 19 interposed in the outrigger hydraulic oil circuit 15 are not in the neutral position but in the functional position for supplying and discharging pressure oil, the outrigger switch LS2 operates.
are arranged in series.

The boom switch LS1 is a normally open contact,
The boom detecting means 24, which is a limit switch provided, for example, on the upper part of the boom receiving support leg 23 of the aerial work vehicle 1 shown in FIG. 1 connects the boom when it returns to the home position. The above-mentioned outrigger switch LS2 is also a normally open contact,
For example, as shown in FIG. 5, the outrigger telescopic manual switching valve 19 is activated by the valve operation detection means 27, which is a limit switch that engages and disengages from the recess 26 at the end of the spool 25 of the outrigger telescopic manual switching valve 19. It is connected when manually switched from the neutral position 19A to the extension side 19B or contraction side 19C shown in FIG. Note that the limit switch 27 is connected to the outrigger telescopic manual switching valve 19.
However, the operation may be made in conjunction with the manual switching valves 28a to 28d (see Fig. 4) that command the left and right and up and down directions provided to operate each outrigger. is a telescopic cylinder 1 which is an outrigger operating hydraulic device 13.
It is only necessary to be able to detect that any one of 3a to 14d is activated.

Incidentally, since the limit switch 27 is attached to any of the above-mentioned switching valves, malfunctions and failures due to intrusion of dust and rainwater are less likely to occur than when the limit switch is installed at or near the ground contact point of the outrigger, for example. , the function as a detection means can be maintained for a long time.

By the way, the boom operation hydraulic circuit 1 shown in FIG.
2 shows an example in which electromagnetic proportional control valves 16 to 18 for supplying and discharging pressure oil and adjusting the amount of supply and discharge thereof are interposed, but in the case where only supply and discharge of pressure oil is required, although not shown in the figure, It is sufficient to provide corresponding electromagnetic control valves for each. The outrigger operating hydraulic circuit 15 shown in FIG. 4 also includes a telescopic manual switching valve 19 for switching between extension and contraction, and four manual switching valves 28 for selecting left/right or vertical operation of each outrigger.
Although the example in which telescopic manual switching valves a to 28d are interposed is shown, if the telescopic manual switching valve 19 is not provided, a manual switching valve for left and right expansion and contraction and a manual switching valve for vertical expansion and contraction for one outrigger (not shown) are provided. A total of eight manual switching valves may be provided. In this case, when at least one of all manual switching valves is switched, the outrigger actuation hydraulic circuit 1
It is sufficient that the supply of pressure oil to the valve 5 is detected, and the outrigger switch LS2 is thereby connected.

According to an embodiment having such a configuration, it can be operated as follows.

With the boom 2 installed on the aerial work vehicle 1 shown in FIG. 1 located at the home position 8, the operator
When the operating lever 19a is pushed, the position is switched from the neutral position 19A to the extension side 19B. As the spool 25 shown in FIG. 5 moves in the direction of the arrow 29, the tip roller 27a of the limit switch 27, which had been engaged with the recess 26, comes off and contracts, causing the limit switch 2
7 is activated. Therefore, the outrigger switch LS2, which is a normally open contact interposed in the solenoid energizing circuit 11 of the electromagnetic control valve 10 shown in FIG. 2, is connected.

On the other hand, as described above, the boom 2 is at the home position 8, and the limit switch 24 attached to the boom support leg 23 is also in the operating state, thereby causing the boom switch of the energizing circuit 11 to be activated.
LS1 is also connected. And the energizing circuit 11
Electric power from the power source 21 is supplied through the solenoid 10a, and the solenoid 10a is excited. Therefore, the electromagnetic control valve 10, which is normally in the first functional position 10A, is switched to the second functional position 10B, making it possible to supply pressure oil to the outrigger operating hydraulic circuit 15 and to the boom operating hydraulic circuit 12. supply is cut off.

In this state, for example, the manual switching valve 2 shown in FIG.
Pull the operating lever 28m of 8b to the neutral position 28A
When switching to function position 28C, hydraulic pump 2
Pressure oil from 0 is supplied to the second functional position 10B of the electromagnetic control valve 10, the functional position 19B of the outrigger telescopic manual switching valve 19, and the functional position 28 of the manual switching valve 28b.
C, and is supplied to the chamber 13A of the left and right extending telescopic cylinder 13b. Then, the piston 13N is moved, and the right front outrigger of the vehicle body extends laterally. After extending the other outriggers by a predetermined amount in this way, when the manual switching valves 28a to 28d are respectively switched to other functional positions 28B, the pressure oil follows the same path to the vertically extending telescopic cylinder 14a.
~14d is supplied to chamber 14A, and the outrigger extends downward.

When the outriggers reach the ground and the vehicle body is stabilized, the vehicle body is fixed on the ground, so each of the manual switching valves 28a to 28d is returned to neutral and the supply of pressure oil is stopped. It goes without saying that in such an operation, the pressure oil discharged from each of the left and right extending telescopic cylinders and the vertical extending telescopic cylinder is returned to the oil tank 30.

Next, the operator
When the switch is returned to the neutral position 19A, the limit switch 2
The tip roller 27a of No. 7 is fitted into the recessed portion 26 of the spool 25 again, and the operation of the limit switch 27 is stopped. As a result, the outrigger switch LD2 of the solenoid energizing circuit 11 is restored, the energization of the circuit 11 is cut off, and the solenoid 1 of the solenoid control valve 10 is turned off.
0a is demagnetized and the valve returns to its first functional position 10A. Therefore, the operation panel 6A shown in FIG.
Alternatively, when the command lever 7A, for example 6b, is tilted in the direction of arrow 31, the former of the limit switches 6M and 6N provided on that lever is connected as shown by the broken line. The solenoid 17a of the electromagnetic proportional control valve 17 interposed in the boom actuating hydraulic circuit 12 is energized by the power of the power source 21, and the valve is switched from the neutral position 17A to the functional position 17B as shown in FIG. Pressure oil from the hydraulic pump 20 is supplied to the luffing cylinder 5b via the first functional position 10A of the electromagnetic control valve 10 and the functional position 17B of the electromagnetic proportional control valve 17, and the boom 2 is raised. Similarly, by operating the other command levers 6a and 6c, the boom 2 can be extended/contracted or rotated, and the gondola 3 can be moved to a desired position.

When the boom 3 is displaced in this way,
Since the limit switch 24 of the boom receiving support leg 23 is not operating, the boom switch LS1 of the solenoid energizing circuit 11 in FIG. 2 is in an open state, and the electromagnetic control valve 10 is held at the first functional position 10A. Even if the operator accidentally operates the operating lever 19a of the outrigger telescopic manual switching valve 19, pressure oil will not be supplied to the outrigger operating hydraulic circuit 15, and the outriggers 4 will remain fixed to the vehicle body. maintain. As a result, it is avoided that the vehicle body falls over due to the moment due to the weight of the gondola 3 and the boom 2 due to an operator's operational error.

When the work on the gondola 3 is completed, operate the above-mentioned command lever as appropriate to close each electromagnetic proportional control valve 1.
The boom 2 can be returned to the home position 8 by energizing predetermined solenoids 6 to 18 and selecting the opening position of each valve. At this time, the limit switch 24 of the boom receiving support leg 23 is activated, and the boom switch of the solenoid energizing circuit 11 is activated.
LS1 is connected. Therefore, when the operator switches the outrigger telescopic manual switching valve 19 from the neutral position 19A to the functional position 19C, which is the contraction side, the limit switch 27 disengages from the recess 26 of the spool 25 and operates as described above, and the outrigger switch LS2 is activated. Connected. Since the electromagnetic control valve 10 is switched to the second functional position 10B, by operating the operating levers 28m of the manual switching valves 28a to 28d in the opposite direction, the left and right extending telescopic cylinders 1
3a to 13d, vertical telescopic cylinder 14a to
14d can be reduced respectively. Note that even if you accidentally operate the command levers 6a to 7d that actuate the boom operation hydraulic equipment 5 while the outrigger 4 is extending or contracting, the supply of pressure oil to the boom operation hydraulic circuit 12 will be interrupted by the electromagnetic control valve 1
Since it is blocked by 0, gondola 3 will not move.

FIG. 6 shows a different embodiment, and is a part of a hydraulic circuit diagram including a solenoid energization circuit 32 for the electromagnetic proportional control valves 16 to 18 in addition to the solenoid energization circuit 11 for the electromagnetic control valve 10 in the previous embodiment. Note that the same reference numerals are given to parts that are not different from those described above, and explanations thereof will be omitted.

What should be noted in this embodiment is that the electromagnetic proportional control valves 16 to 16 are interposed in the boom operation hydraulic circuit 12.
The outrigger 4 is connected to the solenoid energizing circuit 32 of 18.
For example, a switch LS3, which is a normally open contact, is provided, which is activated when the fixation of the vehicle body is detected. This switch is connected by a relay 34 that operates when all normally open contacts r1 to r4 interposed in series in a relay circuit 33 are connected, and each normally open contact has four outriggers (not shown). 4 extends downward to fix the vehicle body, the connection is made by a limit switch that is activated.

According to such a configuration, after the aerial work vehicle 1 is stopped at a predetermined position and before the vehicle body is fixed by the outriggers 4, displacement of the gondola 3 is prevented. That is, if the vehicle body is not fixed by all of the outriggers 4, the normally open contact r1
~r4 is not connected, and the relay 34 is not supplied with power from the power supply 21,
Therefore, the switch LS3 interposed in the solenoid energizing circuit 32 of the electromagnetic proportional control valves 16 to 18 is in an open state.

Even if the operator operates any of the command levers 6a to 7c on the operation panel 6A or 7A, the solenoids 16a to 18b of the electromagnetic proportional control valves 16 to 18 are prevented from being energized. When the solenoid control valve 10 is in the first functional position 10A, pressure oil is supplied to the boom operating hydraulic circuit 12.
Even if the electromagnetic proportional control valves 16 to 18
The hydraulically operated equipment 5 will not operate. In this way, even if the boom is displaced after the worker is stopped in a predetermined position and before the vehicle body is secured with the outriggers, the boom operating hydraulic equipment will not operate, so securing with the outriggers is not necessary. I understand. Other operations are the same as in the previous example.

As can be seen from the above explanation, the boom switch operates when it is detected that the boom has returned to its home position, and the boom switch operates when it is detected that the switching valve interposed in the outrigger operating hydraulic circuit is operating. Depending on whether or not the outrigger switch is connected, the opening function position of the circuit switching solenoid control valve is automatically switched, so that pressure oil is supplied only to either the boom operating hydraulic circuit or the outrigger operating hydraulic circuit. Become. Therefore, even if an operator accidentally operates the outrigger operating hydraulic equipment to reduce the operation when the boom is not in the home position, the electromagnetic control valve will shut off the oil supply to the outrigger operating hydraulic equipment, and the outrigger will not operate. Operation is prevented. The drawbacks that occurred in the prior art are therefore eliminated. Note that at this time, only the operation of the boom is permitted. Further, when the vehicle body is being fixed to the ground using the outriggers, even if the boom operating hydraulic equipment is operated, the boom operation is prevented, thereby preventing the vehicle body from overturning.

In addition, if the state in which the vehicle body is supported by the outriggers is released, the valve operation detection means immediately changes the outrigger switch to the connected state. As a result, if you inadvertently start retracting the outriggers while the boom is away from the home position, pressure oil is supplied through the solenoid control valve only to operate the boom actuating hydraulic equipment; Even if you try to reduce the size, the outriggers will not release their support to the vehicle body, and safety will be maintained. In the conventional technology, the second electrical contact becomes connected when the outrigger is retracted to a certain extent, so if the boom switching valve continues to be operated at that point, the boom operating hydraulic equipment will be activated, resulting in a dangerous situation. However, such a situation can be avoided.

If, for example, the valve operation detection means fails while this safety function is in effect, the outrigger may be retracted, but
If the boom is activated due to a false signal indicating that the vehicle is fixed to the ground by the outriggers, an unfortunate situation can occur. However, since the valve operation detection means is provided in the manual switching valve that commands the operation of the outriggers as described above, compared to the case where the means for detecting the fixation of the vehicle body by the outriggers is provided near the outrigger installation location, The frequency of intrusion of dust, rainwater, etc. is extremely low. Malfunctions and erroneous signals that would occur if such troubles occur are virtually eliminated, ensuring the safety of the car body and making it possible to move the gondola as desired.

[Brief explanation of drawings]

Figure 1 is a front view of a boom equipped with a gondola and an aerial work vehicle equipped with outriggers;
Fig. 2 is a partial hydraulic circuit diagram of an embodiment of the present invention including a solenoid energizing circuit for a solenoid control valve for circuit switching, Fig. 3 is a boom operating hydraulic circuit diagram for driving boom operating hydraulic equipment, and Fig. 4 is a hydraulic circuit diagram of a part of the circuit including a solenoid energizing circuit for a solenoid control valve for circuit switching. Outrigger operation hydraulic circuit diagram, Figure 5 is a diagram of the limit switch installed on the outrigger telescoping manual switching valve, and Figure 6 is a different embodiment. FIG. 2 is a partial hydraulic circuit diagram in which a solenoid energization circuit of an electromagnetic proportional control valve of the circuit is provided. DESCRIPTION OF SYMBOLS 1...Aerial work vehicle, 2...Boom, 3...Gondola, 4...Outrigger, 5...Boom operating hydraulic equipment, 5a...Swivel motor, 5b...Luffing cylinder, 5c...Telescopic cylinder, 8 ... Home position, 10 ... Solenoid control valve, 10A ... First function position, 10B ... Second function position, 11 ... Solenoid energization circuit, 12 ... Boom operation hydraulic circuit, 1
3... Outrigger operating hydraulic equipment, 15... Outrigger operating hydraulic circuit, 19... Outrigger telescopic manual switching valve, 24... Boom detection means, 27... Valve operation detection means, 28a to 28d... Manual switching valve,
LS1...Boom switch, LS2...Outrigger switch.

Claims (1)

[Scope of Claims] 1. Outrigger operating hydraulic equipment that includes boom operating hydraulic equipment such as a swing motor, a luffing cylinder, and a telescoping cylinder that displaces a gondola provided at the tip of the boom, as well as an outrigger that operates an outrigger for fixing the vehicle body. For aerial work vehicles with a solenoid control valve having a second functional position for supplying oil, a boom detection means for detecting when the boom has returned to the home position, and a manual switching interposed in the outrigger operating hydraulic circuit for commanding the outrigger to operate. a valve operation detection means that detects whether the functional position of the valve is neutral in conjunction with the movement of the valve; a boom switch that is brought into a connected state when the boom detection means detects that the boom is in the home position; an outrigger switch that is connected when the valve operation detection means detects that the manual switching valve is not in the neutral position; and the boom switch and outrigger switch are arranged in series, and both switches are connected. A boom and outrigger hydraulic operating device for an aerial work vehicle, sometimes comprising: a solenoid energization circuit for switching the electromagnetic control valve from a first functional position to a second functional position.