JPH1045380A - Operational contradictory error detecting device of work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the detection of an operational contradictory error in abnormal condition by setting a work machine nonoperable area such as a regulating area on the basis of a structure of a work vehicle in itself and a work environment by a work machine nonoperable area setting unit, and preventing an error detector from detecting the operational contradictory error. SOLUTION: A regulating area on the basis of a structure of a work vehicle in itself and a work environment is set in a work machine nonoperable area setting unit 34. In an operational contradictory error detecting device, at engine stopping time, at simultaneous operation time of plural operation levers, at time when a work machine is put in an nonoperable area or the like, an error detector 11 does not detect an operational contradictory error, and detection of the operational contradictory error in a abnormal condition can be avoided. When the operational contradictory error is generated, at ordinary work time except for enging stopping time, simultaneous operation time and time when the work machine is put in a nonoperable area, the error detector 11 detects a contradictory error by respective signals transmitted from first to third comparators 41 to 43, and regulation on the basis of the operational contradictory error is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulically operated working machine mounted on a working vehicle such as an aerial working vehicle or a crane vehicle, and more particularly to operating a valve operating means in such a working machine by a predetermined amount or more. The present invention relates to an operation inconsistency error detection device for a working machine that detects an operation inconsistency error when the working machine does not perform a predetermined operation in spite of the above.

[0002]

2. Description of the Related Art A working machine mounted on an aerial work vehicle or a crane truck is operated by various actuators operated by valve operating means. The valve operating means is a manual operation lever when the valve is for manual operation, and the joystick and the controller correspond to the remote control valve, but in the following description, the operation lever is adopted as the valve operating means. The case will be described.

FIG. 1 shows a crane vehicle as an example of this type of work vehicle. In this crane vehicle, a hydraulically operated work machine 2 is mounted on a vehicle 1. This figure 1
The work machine 2 shown in FIG. 1 is provided with an outrigger 3 provided on a vehicle 1, a swivel base 4 provided on a frame of the vehicle 1, and a telescopic boom 5 mounted on the swivel base 4.

The actuator 9 for operating the work machine 2 includes, for example, a telescopic cylinder for the outrigger 3, a rotary motor for the swivel base 4, an up-and-down cylinder 15 of the telescopic boom 5,
There is a telescopic cylinder 16 of the telescopic boom 5 and the like. The work machine 2 is provided with various detectors 22 for detecting the operation position of the work machine. This work implement operating position detector 22
For example, there are an outrigger overhang length detector, a swivel swing position detector, a boom angle detector 25, a boom length detector 26, a boom load detector 27, and the like.

In the crane truck shown in FIG. 1, various controls are performed by a control device based on data from various working machine operating position detectors 22. The control by the control device includes, for example, an operation range regulation based on the structure of the work vehicle itself, a work range regulation based on the work environment (interference prevention regulation, overturn prevention regulation), and an operation inconsistency error targeted by the present application. There are regulations and so on.

The operation inconsistency error can be detected by an operation inconsistency error detecting device when the working machine does not perform a predetermined operation despite operating the operation lever by a predetermined amount or more. .

That is, a known operation inconsistency error detecting device is:
A detection value from the operation amount detector that detects the operation amount of the operation lever, and a detection value that detects that the work implement is operating (determined based on the detection value from the work implement operation position detector)
When the control device determines that the work implement is not operating despite the operation amount detection value being equal to or greater than the predetermined value, the error detector detects an operation inconsistency error. . When the error detector detects an operation inconsistency error, the error is displayed on a display.

By the way, in this type of working machine 2, a working machine inoperable area where the working machine does not operate even when the operating lever is operated, such as a regulation area based on the structure of the working vehicle itself or a regulation area based on the working environment. There is. That is, as the restricted area based on the structure of the work vehicle itself, for example, the stroke end side operation in the stroke end state of the work machine, the boom lowering operation in the boom rest retracted state, or the work machine or the vehicle itself and the work machine interfere with each other. There is an operation of the work machine to the side to perform. On the other hand, as the regulation area based on the work environment, there are a regulation side operation in the interference regulation state by the control device and a dangerous side operation in the fall prevention regulation state by the control device. In this type of working machine 2, the working machine naturally does not operate in the operation with the engine stopped, and when the plurality of operating levers are simultaneously operated, the actuator with the extremely large load may not operate. is there.

[0009]

However, according to the known operation inconsistency error detecting device, when the operating device corresponding to the operation is not operated while the operation lever is operated for a predetermined amount or more, The error detector detects an operation inconsistency error. Therefore, in the known operation inconsistency error detecting device, the operation in the inoperable range of the working machine listed above,
The error state is detected even when the work machine 2 is not operating and there is no abnormality, such as when the engine is stopped or at the same time as the simultaneous operation. Or interrupt work,
There was a problem that workability deteriorated.

The present invention has been made in view of the above-mentioned conventional problems, and provides an operation inconsistency error detection device for a working machine in which an operation inconsistency error can be detected by an error detector only when an operation inconsistency error actually occurs. It is intended to be.

[0011]

The present invention has the following structure as means for solving the above-mentioned problems.

According to the first aspect of the present invention , an error detector detects an operation inconsistency error when a working machine does not perform a predetermined operation despite operating a valve operating means by a predetermined amount or more. In the operation inconsistency error detection device for the working machine, the operation amount detection value from the operation amount detector for detecting the operation amount of the valve operating means and the operation amount set value previously set in the operation amount setting device. And a first comparator that issues a signal to the error detector when the operation amount detection value exceeds the operation amount set value, and a work implement operation position detector that detects an operation position of the work implement. The actual work machine operation amount obtained based on the work machine operation position detected value is compared with the work machine operation amount set value previously set in the work machine operation amount setting device, and the actual work machine operation amount An error occurs when the work implement A second comparator that emits a signal to the detector, a work implement operating position detection value from the work implement operating position detector is compared with a work implement inoperable area setting value set in the work implement inoperable area setting device. And a third comparator that issues a signal to the error detector when the work implement operating position detected value has not reached the work implement inoperable area set value. The error detector detects an operation inconsistency error only when all the signals from the first, second, and third comparators are input to the error detector.

The operation amount set value set in the operation amount setting device is set to a value corresponding to the operation amount when the valve operating means is operated only to the extent that the work implement starts operating. The first comparator outputs a signal to the error detector when the valve operating means is operated beyond the operation amount set value set in the operation amount setting device. In other words, when the operation amount detection value is smaller than the operation amount set value, no signal is emitted from the first comparator.

The work implement operation amount set value set in the work implement operation amount setting device is set to such an extent that the operation of the work implement can be confirmed via the work implement operation position detector. The second comparator outputs a signal to the error detector when the actual value of the work implement operation amount obtained based on the detection value from the work implement operation position detector is smaller than the work implement operation amount set value. To emit. In other words, if the actual work implement operation amount is larger than the work implement operation amount set value, no signal is issued from the second comparator.

The work machine inoperable area includes, for example, a stroke end side operation in a stroke end state of the work machine, a boom lowering operation in a boom rest retracted state, and a work to a side where the work machine or the vehicle itself interferes with the work machine. Working environment, such as a regulation area based on the structure of the work vehicle itself, such as machine operation, or a regulation side operation in a work range regulation (interference regulation) state by the control device, or a dangerous side operation in a fall prevention regulation state by the control device There are regulatory areas based on The work implement inoperable area setting device sets these work implement inoperable area set values in advance, and the work implement operating position detection value from the work implement operating position detector sets the work implement inoperable area set value. Third when the value is not reached
A signal is emitted from the comparator. In other words,
When the work implement has reached the inoperative range, no signal is output from the third comparator.

According to the first aspect of the present invention, the error detector is activated only when all the signals from the first comparator, the second comparator, and the third comparator are input to the error detector. An operation inconsistency error is detected. In other words, if at least one of the first to third comparators does not transmit a signal, the error detector does not detect an operation inconsistency error.

In this way, the error detector does not detect an operation inconsistency error in the above-mentioned work implement inoperable region, and it is possible to avoid detecting an operation inconsistency error in a non-abnormal state. In the state where the work implement is in the inoperable range, if an operation inconsistency error actually occurs, the work implement is moved to the inoperable range side (for example, interference prevention regulation or fall prevention regulation) by another regulation (for example, interference prevention regulation or fall prevention regulation). Dangerous side)
Can not be operated at the same time, and the safety of work is ensured. Also, in the state where the work implement is in the inoperative range, even if an operation inconsistency error actually occurs, the work implement can be operated to the operable side (safe side) because the error is not detected. However, when the work machine leaves the inoperable area, a signal is instantaneously issued from the third comparator, the error detector detects an operation inconsistency error, and immediately the regulation based on the operation inconsistency error is performed. Become like

According to a second aspect of the present invention, there is provided an error detector for detecting an operation inconsistency error when a working machine does not perform a predetermined operation despite operating a valve operating means by a predetermined amount or more. In the operation inconsistency error detection device for a work machine, the error detector does not detect the operation inconsistency error when the engine is stopped.

That is, when the engine is stopped, the hydraulic pump serving as the drive source of the working machine is also stopped, so that it is not abnormal that the working machine does not operate even if the valve operating means is operated. Ensure that the detector does not detect inconsistency errors.

According to a third aspect of the present invention, an error detector detects an operation inconsistency error when a working machine does not perform a predetermined operation despite operating a valve operating means by a predetermined amount or more. In the operation inconsistency error detection device for a working machine, the error detector does not detect an operation inconsistency error when a plurality of valve operating means are simultaneously operated.

That is, when a plurality of valve operating means are simultaneously operated in the working machine, the actuator on the side with an extremely large load may not operate, and in this case also, there is no abnormality. Not to be detected.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an operation inconsistency error detecting apparatus according to an embodiment of the present invention;
FIG. 1 shows a mobile crane equipped with a boom type crane as a working machine 2.

The crane truck shown in FIG. 1 has a hydraulically operated working machine 2 mounted on a vehicle 1 as described in the section of the prior art. The work machine 2 shown in FIG. 1 is configured such that an outrigger 3 is provided on a vehicle 1, a swivel 4 is provided on a frame of the vehicle 1, and a telescopic boom 5 is mounted on the swivel 4.

The actuator 9 for operating the work machine 2 includes, for example, a telescopic cylinder for the outrigger 3, a rotary motor for the swivel table 4, an up-and-down cylinder 15 of the telescopic boom 5,
There is a telescopic cylinder 16 of the telescopic boom 5 and the like. The work machine 2 is provided with various detectors 22 for detecting the operation position of the work machine. This work implement operating position detector 22
For example, there are an outrigger overhang length detector, a swivel swing position detector, a boom angle detector 25, a boom length detector 26, a boom load detector 27, and the like.

In the crane truck shown in FIG. 1, various controls are performed by the control device based on data from the various working machine operating position detectors 22. The control by the control device includes, for example, an operation range regulation based on the structure of the work vehicle itself, a work range regulation based on the work environment (interference prevention regulation, overturn prevention regulation), and an operation inconsistency error targeted by the present application. There are regulations and so on.

The operation inconsistency error can be detected by the operation inconsistency error detecting device when the working machine does not perform the predetermined operation despite operating the valve operating means by a predetermined amount or more. I have.

In the operation inconsistency error detecting device of this embodiment, as shown in FIG. 2, the control device 10 includes an operation amount setting device 31, a working device operation amount setting device 32, , The work implement inoperable range setting unit 34, the first comparator 41, the second comparator 42, the third comparator 43, the error detector 11, and the display 12. In FIG. 2, reference numeral 6 denotes a hydraulic pump driven by an engine (PTO) 13, 7 denotes an operation lever for operating an operation valve 8, and 9 denotes an actuator for operating a work machine. or,
The operation lever 7, the operation valve 8, and the actuator 9 are provided for each drive portion of the work machine 2, one set each. In the embodiment shown in FIG. 2, the operation valve 8 is of a manual type, and the operation lever 7 is used as the valve operation means. Is the valve operating means. In this embodiment, a case will be described in which an operation lever is employed as the valve operation means.

The operation amount of the operation lever 7 is determined by the operation amount detector 2.
1 can be detected. This manipulated variable detector 2
As 1, a potentiometer is generally employed, and the operation amount of the operation lever 7 is converted into a voltage value and output.

The operation amount setting device 31 has the operation lever 7 in advance.
Is set to a value corresponding to the amount of operation when the driver is operated only to the extent that the drive portion of the work implement 2 starts operating. This operation amount set value is compared with the operation amount detection value from the operation amount detector 21.

The working machine operation amount setting device 32 includes the working machine 2
A value (working machine operation amount set value) is set such that the operation of the swivel table 4 and the telescopic boom 5 can be confirmed via the working machine operation position detector 22. The work implement operation amount set value is compared with the work implement operation amount actual value calculated by the work implement operation amount calculator 33 based on the detection value from the work implement operation position detector 22. Note that the work implement operation amount set value set by the work implement operation amount setting device 32 includes a plurality of operation levers 7.
Can be different from the single operation.

The work machine inoperable area setting device 34 sets a work machine inoperable area set value. That is, this type of work machine 2 has a work machine inoperable area where the work machine 2 does not operate even when the operating lever 7 is operated, and the work machine inoperable area setting value is set to the work machine inoperable area setter 34. Is set to The work machine inoperable area includes a control area based on the structure of the work vehicle itself and a control area based on the work environment. The restricted area based on the structure of the work vehicle itself includes, for example, a stroke end side operation in a stroke end state of the work machine, a boom lowering operation in a boom rest retracted state, and a side where the work machine or the vehicle itself interferes with the work machine. On the other hand, the control area based on the working environment includes the control side operation in the interference control state by the control device and the dangerous side operation in the fall prevention control state (so-called AML control) state by the control device. Etc. Then, the control area based on the structure of the work vehicle itself (the stroke end area of the work machine, the boom rest storage area, etc.) is set in advance in the work machine inoperable area setting unit 34, while the interference control area is set for each work. The work machine inoperable area setting device 34 is set, and the overturn prevention restricted area is set in the work machine inoperable area set device 34 using the overturn prevention regulated value incorporated in the control device 10. The work implement inoperable area set value set in the work implement inoperable area setter 34 is the work implement inoperable area detector 22
Is compared with the work implement operating position detection value from.

The first comparator 41 compares the operation amount detection value (signal A ₁ ) from the operation amount detector 21 with the operation amount set value (signal A ₂ ) set in the operation amount setting unit 31. It is supposed to. Then, the first comparator 41 emits a signal (A ₇ ) to the error detector 11 when the operation amount detection value exceeds the operation amount set value.
In other words, when the operation amount detection value is smaller than the operation amount set value, the signal (A ₇ ) from the first comparator 41 is not transmitted.

The second comparator 42 calculates the actual work machine operation amount (signal A) from the work machine operation amount calculator 33 which is calculated based on the detection value (signal A ₃ ) from the work machine operation position detector 22.
₄ ) is compared with the work implement operation amount set value (signal A ₅ ) set in the work implement operation amount setting device 32. Then, the second comparator 42 emits a signal to the error detector 11 when the actual working machine working amount (signal A ₄ ) is smaller than the working machine working amount set value (signal A ₅ ). I have. In other words, the signal (A ₈ ) from the second comparator 42 is not transmitted when the actual work implement operation amount is larger than the work implement operation amount set value.

The third comparator 43 detects the detected value of the working machine operating position (signal A ₃ ) from the working machine working position detector 22 and the working machine inoperable area set in the working machine inoperable area setting unit 34. The value is compared with a set value (signal A ₆ ). The third comparator 43 determines that the work implement operating position detected value (signal A ₃ ) is the work implement inoperable range set value (signal A ₆ ).
, A signal (A ₉ ) is issued to the error detector 11. In other words, the signal (A ₉ ) is not transmitted from the third comparator 43 when the work implement 2 (the swivel base 4 and the telescopic boom 5 and the like) has reached the inoperative range.

In this operation inconsistency error detecting device, all signals (A ₇ , A ₈ , A ₉ ) from the first comparator 41, the second comparator 42, and the third comparator 43 are used as error detectors. The error detector 11 detects an operation inconsistency error only when it is input to the terminal 11. In other words, under the condition that at least one signal from each of the first to third comparators 41, 42, 43 is not transmitted, the error detector 11 does not detect an operation inconsistency error. .

Also, in the operation inconsistency error detecting device of this embodiment, the engine is stopped and the plurality of operation levers 7 are controlled.
Are simultaneously operated so that the error detector 11 does not detect an operation inconsistency error.

FIG. 3 shows a flowchart of the operation inconsistency error detecting device according to the embodiment of the present invention. Hereinafter, the operation of the operation inconsistency error detecting device will be described with reference to this flowchart. Incidentally, in FIG. 3, as the operation of the work machine 2, the simultaneous operation of the expansion and relief of the telescopic boom 5 (or swivel the swivel deck 4) (step S _2), Fushimi operation of the telescopic boom 5 (step S ₃₎ The extension operation of the telescopic boom 5 (step S ₄ ), the raising operation of the telescopic boom 5 (step S ₅ ), the contracting operation of the telescopic boom 5 (step S ₆ ), and the turning operation of the swivel base 4 (step S 4) ₇ ).

[0038] In FIG. 3, the engine stop state in step S _1, and at the time of simultaneous operation of a plurality of control lever 7 shown in step S _2, the error detector 11 does not detect the actuation inconsistency errors respectively (step S _15). Therefore, the display 12 (FIG. 2) does not display the operation inconsistency error.

[0039] During Fushimi operation of the telescopic boom 5 shown in step S _3, the boom rest storage state (step S _8), the signal A ₉ from the third comparator 43 shown in FIG. 2 are not transmitted, the error detector 11 does not detect the actuation inconsistency error (step S _15). Further, at the time of Fushimi operation of the telescopic boom 5, even if not the boom rest retracted state, when the regulatory operation by interference prevention regulations shown in step S _9, or anti-tip regulatory shown in step S ₁₀ (AML1
For regulating operation by 100% or higher), or in such cases the work machine shown in step S ₁₁ of the stroke end state, since the signal A ₉ from the third comparator 43, respectively is not transmitted, the error detector 11 is actuated contradiction It does not detect an error (step S _15).

[0040] In the time extension operation of the telescopic boom 5 shown in step S _4, in the state of step S ₁₀ or step S _11, similarly to the above error detector 11 does not detect the actuation inconsistency errors respectively (step S ₁₅₎ .

[0041] during start operation of the telescopic boom 5 shown in step S _5, and at the time of contraction operation of the telescopic boom 5 shown in step S _6, in the state of step S _11, respectively in the same manner as described above error detector 11 is actuated contradiction It does not detect an error (step S _15).

[0042] During turning operation of the swivel deck 4 as shown in step S _7, anti-tip regulatory shown in step S ₁₂ (AML1
00% or more) and step S ₁₃
If the regulatory operation by interference prevention regulations shown in the same manner as described above error detector 11 does not detect the actuation inconsistency errors respectively (step S _15).

At the time of various operations on the work machine 2 (steps S ₃ to S ₇ ), the engine is not stopped (step S ₁ ), not simultaneous operation (step S ₂ ), and steps S ₈ to S ₈ are not performed. only when not corresponding to the respective conditions of _13, a state in which the error detector 11 can detect the actuation inconsistency errors as shown in step S _14. Therefore, in the state where the error detector 11 can detect the operation inconsistency error in this manner, the signals (A ₇ , A ₈ , A ₈ , A ₈ ,
When A ₉ ) is transmitted, the error detector 11 detects an operation inconsistency error and displays it on the display 12. When the error detector 11 detects an operation inconsistency error, the operation of the work implement 2 may be prohibited together with the display on the display 12.

In this operation inconsistency error detection device, as described above, the error detector 11 is activated when the engine is stopped, when the plurality of operation levers 7 are simultaneously operated, when the work implement 2 is in the inoperable range, and the like. The inconsistency error is not detected, and the detection of the operation inconsistency error in a normal state can be avoided. Therefore, as is well known, in the case where an operation inconsistency error is detected although it is not abnormal,
The workability is improved because the user does not mistakenly think that the work is abnormal and does not interrupt the work.

When an operation inconsistency error actually occurs, the first to third operations are performed during normal operation except for the above three conditions (when the engine is stopped, during simultaneous operation, and when the work implement is in the inoperable range). Each of the signals (A ₇ , A ₈ , A ₉ ) transmitted from each of the comparators 41, 42, and 43 generates an error detector 11.
Detects an operation inconsistency error, and the regulation based on the operation inconsistency error is performed. If an operation inconsistency error actually occurs in the work machine inoperable area state, the work machine 2 is moved to the inoperable area side (danger side) by another regulation (for example, interference prevention regulation or fall prevention regulation). ) Can not be operated, and the safety of work is ensured. Further, in a state where the work implement 2 is in the inoperable range, even if an operation inconsistency error actually occurs, the work implement 2 can be operated on the safe side because the error is not detected. When the work implement 2 leaves the inoperable area, the signal (A ₉ ) is instantaneously issued from the third comparator 43, and the error detector 11 detects an operation inconsistency error. Regulations based on errors will be enforced.

In this embodiment, the manual operation lever 7 is used as the valve operating means. However, when a remote control valve is used as the valve, a joystick and a controller are used as the valve operating means. You. In this case, the operation inconsistency error detection device of the present invention can be used for checking inconsistency between the drive output to the valve and the change in the output of the operation amount detector, and the operation of the remote control valve can also be checked.

[0047]

In the operation inconsistency error detecting device according to the first aspect of the present invention, a work machine inoperable region such as a regulation region based on the structure of the work vehicle itself or a work environment is set. If the work implement 2 is set in the operating unit 2 and the work implement 2 is in the inoperative range, the error detector 11 does not detect the operation inconsistency error. Can be avoided.
Therefore, as is well known, unlike the case where an operation inconsistency error is detected despite the fact that the operation is not abnormal, it is not necessary to misunderstand that the operation is abnormal or to interrupt the operation, thereby improving the workability. There is.

According to the second aspect of the present invention, when the engine is stopped, the error detector 11 does not detect an operation inconsistency error. Detecting the operation inconsistency error).

Further, according to the third aspect of the present invention, when a plurality of valve operating means 7 are simultaneously operated, the error detector 11 does not detect an operation inconsistency error. There is an effect that can be avoided.

[Brief description of the drawings]

FIG. 1 is a side view of a crane equipped with a working machine.

FIG. 2 is a block diagram of an operation inconsistency error detection device according to an embodiment of the present invention.

FIG. 3 is a flowchart showing an operation of the operation inconsistency error detection device according to the embodiment of the present invention.

[Explanation of symbols]

7 is a valve operating means (operating lever), 9 is an actuator, 10 is a control device, 11 is an error detector, 12 is a display, 21 is an operation amount detector, 22 is a work implement operating position detector, and 31 is an operation amount. Setting device, 32 is a working machine operation amount setting device,
33 is a working machine operation amount calculator, 34 is a working machine inoperable range setting device, 41 is a first comparator, 42 is a second comparator, and 43 is a third comparator.

Claims (3)

[Claims] An operation inconsistency error is detected by an error detector (11) when the work implement (2) does not perform a predetermined operation despite operating the valve operating means (7) by a predetermined amount or more. An operation inconsistency error detection device for a working machine as described above, wherein an operation amount detection value from an operation amount detector (21) for detecting an operation amount of said operation means (7) and an operation amount setting device (3)
A signal (A ₇ ) is issued to the error detector (11) when the operation amount detection value exceeds the operation amount setting value by comparing the operation amount setting value set in 1). First
A comparator (41), and a working machine working amount actual value obtained based on a working machine working position detected value from a working machine working position detector (22) for detecting the working position of the working machine (2), in advance. A work implement operation amount set value set in the work implement operation amount setter (32) is compared with the error detector (11) when the work implement operation amount actual value is smaller than the work implement operation amount set value. ), A second comparator (42) for issuing a signal (A ₈ ), a working machine operating position detected value from the working machine working position detector (22), and a work machine inoperable area setting device (34). By comparing the set value of the work implement inoperable area with the set value of the work implement inoperable area, a signal (11) is sent to the error detector (11) when the detected value of the work implement operating position does not reach the set value of the work implement inoperable area. A
₉ ), and a third comparator (43) that emits all signals (A ₇ , A ₇ ) from the first comparator (41), the second comparator (42), and the third comparator (43). A ₈ , A
₉ ) An operation inconsistency error detecting device for a working machine, wherein the error detector (11) detects an operation inconsistency error only when the error detector (11) is input to the error detector (11). An operation inconsistency error is detected by an error detector (11) when the work implement (2) does not perform a predetermined operation despite operating the valve operating means (7) by a predetermined amount or more. An operation inconsistency error detection device for a working machine, wherein the error detector (11) does not detect an operation inconsistency error when the engine is stopped. . 3. An operation inconsistency error is detected by an error detector (11) when the work implement (2) does not perform a predetermined operation despite operating the valve operating means (7) by a predetermined amount or more. An operation inconsistency error detection device for a working machine as described above, wherein the error detector (11) does not detect an operation inconsistency error when a plurality of operating means (7) are operated simultaneously. Inconsistent operation error detector for work equipment.