JP3409959B2 - Working machine operating device for hydraulic construction machinery - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine operating device for a hydraulic construction machine, and more particularly to a hydraulic construction machine suitable for use in a construction machine such as a hydraulic excavator equipped with an actuator for attachment such as an offset cylinder. Work machine operation device.

[0002]

2. Description of the Related Art Generally, in a hydraulic excavator having an offset mechanism, when the working machine is switched from a working posture in which it is extended forward to a small swinging posture in which the working machine is pulled toward you and held, the offset is performed while preventing spillage of a bucket. Since it is necessary to operate the two operating levers with both hands, turning, boom raising, arm pulling and horizontal holding of the bucket are performed, and at the same time, offset operation is performed by depressing the operating pedal. ing.

Further, recent hydraulic excavators are equipped with a foot-operated accelerator pedal for accelerating an offset operation, as described in, for example, Japanese Unexamined Patent Publication No. 7-238574, and if necessary, this accelerator pedal is used. There has also been proposed a method in which an offset operation or the like is quickly performed by the stepping operation of, and a fine operation is performed while the accelerator pedal is not operated.

FIG. 6 is a side view showing the overall construction of a conventional hydraulic excavator, and FIG. 7 is an explanatory view of the inside of a cab of the hydraulic excavator.

In FIG. 6, 1 is a traveling body, 2 is a driver's cab 3.
Is a revolving superstructure disposed above the traveling body 1, and the traveling body 1 and the revolving body 2 form a main body of the hydraulic excavator. Reference numeral 4 is an offset boom, 5 is an arm rotatably connected to the tip of the boom 4, 6 is a bucket rotatably connected to the tip of the arm 5, and these boom 4, arm 5 and bucket 6 are The working machine 7 is configured. The boom 4 includes a first boom 4a that is rotatably connected to the right side of the operator's cab 3, and a second boom 4c that is connected to the tip of the first boom 4a via a connecting member 4b. There is. Reference numeral 8 is a boom cylinder that drives the first boom 4a, 9 is an offset cylinder that drives the second boom 4c, 10 is an arm cylinder that drives the arm 5, and 11 is a cylinder.
Is a bucket cylinder that drives the bucket 6, and
The boom 4c is laterally translated by the offset cylinder 9 with respect to the first boom 4a.

As shown in FIG. 7, operating levers 12, 13, 14, 15 and an operating pedal 16 and an accelerator pedal 17 are installed near the seat 3a in the cab 3, and these are installed. It is operated by the limbs of the operator. For example, when the operator grips the right operation lever 12 located in front of the seat 3a in the operator's cab 3 with the right hand and appropriately operates in the front-back direction, the boom flow rate control valve (not shown) supplies the boom cylinder 8 with the boom cylinder 8. Since the amount of pressure oil supplied is controlled, the boom 4 rotates. Similarly, when the right operating lever 12 is appropriately operated in the lateral direction, the bucket 6 is rotated by driving the bucket cylinder 11. Similarly,
When the left operation lever 13 located to the left front of the seat 3a is grasped with the left hand and appropriately operated in the front-rear direction, a turning operation is performed, and when the left operation lever 13 is appropriately operated in the lateral direction, an arm operation is performed, When the pair of traveling levers 14 and 15 located in front of the seat 3a are appropriately operated in the front-rear direction, a right traveling operation and a left traveling operation are performed. Further, when the operation pedal 16 located on the right side of the traveling lever 14 is properly depressed in the front-rear direction, the amount of pressure oil supplied from the offset flow control valve (not shown) to the offset cylinder 9 is controlled. The offset operation is performed, and when the accelerator pedal 17 located near the operation pedal 16 is further depressed, the operations of the offset cylinder 9 and the like are accelerated.

[0007]

In the conventional work equipment operating device for a hydraulic excavator described above, the operating pedals 16 and the accelerator pedal 17 are operated by the feet while operating the operating levers 12, 13 with both hands during work. There are cases. For example, when it is predicted that the bucket 6 and the driver's cab 3 interfere with each other when the work machine 7 is switched from the work attitude extended forward to the small turning attitude as shown in FIG. 6, the operator uses both hands to operate the operation levers 12, There is a case where turning the boom, raising the boom, pulling the arm and horizontally holding the bucket are performed by operating 13, and a right offset operation is performed by operating the operation pedal 16. However, in such a stepping operation, the operator must step on the operation pedal 16 while holding his / her body with one foot while sitting on the seat 3a. Therefore, not only the operation is unstable, but also the operation lever 12 is operated by the operator's hand. , 13 compared to the case of handling, there is a problem that the operation feeling is inferior and the fine operation is difficult. Further, when the accelerator pedal 17 is depressed as necessary, it is necessary to switch from the operation pedal 16 to the accelerator pedal 17, and this operation is complicated and inconvenient.

[0008] As an actuator for driving an attachment include, in addition to the offset cylinder 9, and a swing cylinder for scan queued to move the part of the working machine in the horizontal direction, such as telescopic cylinder for extending and contracting the working machine is used In some cases, these swing cylinders, telescopic cylinders, and the like are also operated by a foot-operated operation pedal, so there is a problem similar to the above.

The present invention has been made in view of the circumstances of the prior art as described above, and an object thereof is to provide a hydraulic construction machine capable of improving operability when operating attachments such as offsets provided in a working machine. Is to provide a working machine operating device.

[0010]

In the present invention, first, an actuator for driving an attachment such as an offset is operated by a button type switch, and this switch is used as a grip portion of an operation lever for operating another actuator. It was decided to arrange. In this case, since the ON / OFF signal is output when the switch is operated, this ON / O signal is output.
Actuators that operate according to the FF signal are suddenly started and stopped, and there is a concern that a load will be spilled from the bucket.

Therefore, in the present invention, in addition to the above configuration,
The same actuator can be selectively operated by both the button-type switch and the foot-operated operation pedal operating means .
The ON / OFF output signal is shaped to reduce the shock when the actuator is started and stopped, and when operating with a foot-operated pedal, a control signal corresponding to the operation amount is output to cause the actuator to perform the desired operation. I was able to operate at speed.

In the present invention thus constructed, the button type switch is
When operating the switch, not only the operation pedal is not required to be stepped on, but a stable posture can be maintained, the switch can be easily operated by the hand holding the operation lever, and the shock at the time of starting and stopping the actuator is reduced. While the
During standstill operation by foot-operated pedal, the control signal corresponding to the operation amount is output, it operates the actuator at the desired operating speed according to the pedal operation
In addition, these button switches and foot operated pedals
Since the same actuator can be operated with the
Depending on the type of work, button type switches and foot operated pedals
By selecting and operating, it can be used for a wide variety of work machine applications.
Can respond .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In a working machine operating device for a hydraulic construction machine of the present invention, a main body having a driver's cab, a working machine rotatably provided on the side of the driver's cab of the main body, In a working machine operating device for a hydraulic construction machine, which includes a plurality of actuators that respectively drive respective members constituting the working machine, and a plurality of flow rate control valves that respectively control the flow rates of hydraulic oil supplied to these actuators, an operating lever for operating at least one of the plurality of actuators is disposed in the grip portion of the operating lever, the steering
A button type switch for ON / OFF switching that operates an actuator different from the actuator operated by the working lever, and to reduce the shock at the time of starting and stopping the actuator operated by this switch. The rise and fall conditions of the ON / OFF output signal from the switch
Has a waveform shaping means for performing waveform shaping to smooth waveform change by suppressing a controller for outputting a control signal for controlling the operation of the flow control valve based on the output signal waveform shaping, and the switch Separately provided to operate the actuator operated by the switch,
A foot-operated operation pedal that outputs a signal corresponding to an operation amount as a control signal of the flow rate control valve, and an O by the switch.
By N / OFF control signal and the stepping operation pedal
A selector is provided for selecting one of a control signal corresponding to an operation amount, and the same actuator can be operated by the switch and the foot-operated operation pedal.

The switch may be any switch as long as it can be turned on and off, but it can be turned on by pressing it.
・ Push switch that switches off is preferable.

Further, in order to apply to a hydraulic construction machine equipped with a pilot control circuit, a control signal from the controller is provided in a pilot line for guiding pilot oil to a flow control valve for an actuator operated by the switch. It is preferable to interpose an electromagnetic proportional valve that opens and closes based on the above.

[0016]

Further, it is preferable to provide a foot-operated accelerator pedal for accelerating the operation of the actuator operated by the switch, in order to selectively use the fine operation and the normal operation of the actuator according to the work content.

The actuator operated by the switch may be any actuator that drives attachments such as a swing cylinder and a telescopic cylinder. However, since it is applied to a small swing hydraulic excavator, a part of the working machine is used. An offset cylinder that moves the laterally is preferred.

[0019]

EXAMPLES Examples will be described with reference to the drawings.
FIG. 1 is a hydraulic circuit diagram of a hydraulic excavator including a working machine operating device for a hydraulic construction machine according to a first embodiment of the present invention, and FIG. 2 is a block diagram showing an overall configuration of the working machine operating device shown in FIG. 3 is a characteristic diagram for explaining the correlation between the operating state of the operation button provided in the work implement operating device of FIG. 1 and the control pilot pressure, and FIG. 4 is an explanatory diagram of the inside of the operating room of the hydraulic excavator,
The parts corresponding to those in FIGS. 6 and 7 are given the same reference numerals.

In FIG. 1, reference numeral 18 is a turning motor, 19 is a right traveling motor, 20 is a left traveling motor, 21 and 22 are hydraulic pumps and pilot pumps driven by unillustrated engines, and 23 and 24 are hydraulic pumps 21 respectively. And a boom cylinder 8 and a bucket cylinder 11 serving as a first actuator, and a flow rate control valve that controls the flow rate of the hydraulic oil discharged from the hydraulic pump 21, and 25 is an offset serving as the hydraulic pump 21 and the second actuator. A flow rate control valve 26, which is provided between the hydraulic pump 21 and the cylinder 9, and controls the flow rate of the hydraulic oil discharged from the hydraulic pump 21, is provided between the hydraulic pump 21 and the other actuators 10, 18 to 20, respectively. Pump 2
1, a flow control valve for controlling the flow rate of the hydraulic oil discharged from 1.
27 is a boom control pilot valve, 28 is an arm control pilot valve, 29 is a bucket control pilot valve, 3
0 is a pilot valve for offset control, 31 is a pilot valve for turning control, 32 is a pilot valve for right running control, 33
Is a pilot valve for left travel control.

Each of the pilot valves 27 to 33 is interlocked with the operating levers 12 to 15 and the operating pedal 16, and, for example, when the operator holds the right operating lever 12 with his right hand and appropriately operates it in the front-rear direction, depending on the operation amount. The pilot pressure signal is supplied from the boom control pilot valve 27 to the boom flow rate control valve 23, and the amount of pressure oil supplied to the boom cylinder 8 is controlled based on the pilot pressure signal.
Similarly, when the right operation lever 12 is appropriately operated in the lateral direction, the bucket flow control valve 24 is generated based on the pilot pressure signal output from the bucket control pilot valve 29.
The supply amount of the pressure oil supplied from the to the bucket cylinder 11 is controlled. When the left operation lever 13 is grasped with the left hand and appropriately operated in the front-back direction, a pilot pressure signal corresponding to the operation amount is supplied from the swing control pilot valve 31 to the swing flow control valve 26, and the pilot pressure signal is supplied. The amount of pressure oil supplied to the swing motor 18 is controlled based on the above. Similarly, when the left operation lever 13 is appropriately operated in the lateral direction, the pressure oil supplied from the arm flow control valve 26 to the arm cylinder 10 is changed based on the pilot pressure signal output from the arm control pilot valve 28. The supply is controlled. When the pair of travel levers 14 and 15 are appropriately operated in the front-rear direction, a pilot pressure signal corresponding to the operation amount is transmitted from the right travel control pilot valve 32, the left travel control pilot valve 33 to each travel flow control valve. 26 to the right traveling motor 1 based on the pilot pressure signal.
9. The amount of pressure oil supplied to the left travel motor 20 is controlled.

When the operation pedal 16 is properly depressed in the front-rear direction, a pilot pressure signal corresponding to the operation amount is supplied from the offset control pilot valve 30 to the offset flow control valve 25, and based on the pilot pressure signal. Thus, the amount of pressure oil supplied to the offset cylinder 9 is controlled. Further, when the accelerator pedal 17 located near the operation pedal 16 is depressed, the operation of the offset cylinder 9 and the like is accelerated.

As shown in FIG. 2, the working machine operating apparatus according to the present embodiment includes a pair of operation buttons 34 and 35 for operating the offset cylinder 9 in two opposite directions, that is, an extending direction and a contracting direction, respectively. , The pair of operation buttons 34,
A controller 36 to which 35 is connected, and electromagnetic proportional valves 37 and 38 that open and close according to a control signal output from the controller 36 are provided. The operation buttons 34, 35
Is a push switch for ON / OFF operation,
As shown in FIG. 4, these operation buttons 34 and 35 are arranged on the grip portion 12 a of the right operation lever 12.

The controller 36 also has an input section 39 for inputting output signals from the pair of operation buttons 34, 35.
3, a waveform shaping means 40 for shaping the waveform of the output current from the input section 39 as shown in FIG. 3, and a control signal for controlling the operation of the flow control valve 25 based on the waveform shaped output signal. And an output unit 41 for
As shown in FIG. 1, the right offset solenoid proportional valve 37 connected to the output section 41 has an inlet side connected to the pilot oil supply pipeline 42 and an outlet side connected to the right offset pilot pipeline 43 via a shuttle valve 44. Connected. The left offset electromagnetic proportional valve 38 is connected to the pilot oil supply pipe 42 on the inlet side and is connected to the left offset pilot pipe 45 on the outlet side via another shuttle valve 46. Further, the controller 36 is also connected to a boom raising electromagnetic proportional pressure reducing valve 47, an arm pulling electromagnetic proportional pressure reducing valve 48, an arm pushing electromagnetic proportional pressure valve 49, and a left offset electromagnetic proportional pressure reducing valve 50.

Further, in this embodiment, the operation buttons 34, 3 are
5, a foot-operated operation pedal 16 for operating the offset cylinder 9 is installed in parallel, and a foot-operated accelerator pedal 17 for accelerating the operation of the offset cylinder 9 and the like is also installed in the vicinity of the foot-operated operation pedal 16. ing.

In the first embodiment constructed as described above, when the operator holds the right operation lever 12 with the right hand and appropriately operates it in the front-rear direction or the left-right direction, the boom cylinder 8 or the bucket cylinder 11 is operated in accordance with the operation amount. Operate. Further, by pressing the right operation button 34 with the right finger, the right offset operation signal from the operation button 34 is input to the input section 39 of the controller 36, and the controller 36 causes the waveform shaping means 40 to perform the offset cylinder 9 operation. The waveform of the right offset operation signal is shaped so as to reduce the shock when starting and stopping. Accordingly, the opening degree of the right offset solenoid proportional valve 37 is controlled. Therefore, as shown in FIG. 3, when the operation button 34 is turned on at time t ₁ , the pilot pressure in the right offset pilot conduit 43 is After rising to the intermediate level, it gradually rises at a quadratic curve-like change rate and reaches the maximum (FULL) level at time t ₂ . Next, at time t ₃ , the operation button 34 is turned off.
Then, after the pilot pressure in the right offset pilot conduit 43 falls to the intermediate level, it gradually decreases at a quadratic curve-like change rate and reaches the minimum level at time t ₄ . That is, in order to avoid abrupt changes at the rising and falling of the signal waveform, a smooth waveform change is obtained by suppressing the rising and falling conditions.

While controlling the opening degree of the right offset solenoid proportional valve 37 in this manner, the pilot oil from the pilot oil supply pipe 42 is fed to the right offset solenoid proportional valve 37, the shuttle valve 44 and the right offset pilot pipe. It is supplied to the offset flow control valve 25 via the passage 43. As a result, the flow control valve 25 moves to the right in FIG. 1, so that the offset cylinder 9 extends and the right offset operation is performed.

Similarly, by pressing the left operation button 35 with the right finger, a left offset operation signal from the operation button 35 is input to the controller 36, and the controller 36 controls the left offset electromagnetic proportional signal. Valve 38
Opens. At this time, the pilot oil from the pilot oil supply conduit 42 is passed through the left offset electromagnetic proportional valve 38, the shuttle valve 46 and the left offset pilot conduit 45 while controlling the opening degree of the offset electromagnetic proportional valve 38. To the offset flow control valve 25. As a result, the flow control valve 25 moves to the left in FIG.
The offset cylinder 9 is contracted to perform the left offset operation.

When the offset operation pedal 16 is depressed to perform the right offset operation, a pilot pressure signal corresponding to the operation amount is transmitted from the offset control pilot valve 30 through the shuttle valve 44 and the right offset pilot conduit 43. Is supplied to the offset flow control valve 25,
The amount of pressure oil supplied to the offset cylinder 9 is controlled based on the pilot pressure signal. Similarly, when the left offset operation is performed with the operation pedal 16, a pilot pressure signal corresponding to the operation amount is output from the offset control pilot valve 30 via the shuttle valve 46 and the left offset pilot conduit 45. 25, and the supply amount of the pressure oil supplied to the offset cylinder 9 is controlled based on the pilot pressure signal.

In the above-described first embodiment, the stepping operation of the operation pedal 16 is not necessarily required during the offset operation, and the operation buttons 34 and 35 provided on the grip portion 12a of the right operation lever 12 may be pressed. , The operator sitting on the seat 3a can maintain a stable posture while holding the body with both feet, and in particular, the left and right operation levers 12 and 1 can be held with both hands.
It is possible to remarkably improve the operability when performing an offset operation while operating 3, and to reduce the shock when the offset cylinder 9 is started and stopped, so that it is possible to prevent spilling of a load from the bucket 6 and a jerky feeling.

Further, in the first embodiment, when performing the offset operation while depressing the accelerator pedal 17, the operation buttons 34 and 35 can be pushed by hand, so that the offset operation pedal 16 and the accelerator pedal 17 can be combined. It is possible to improve operability from this point as well, because there is no need for a stepping action. Further, the operation pedal 16 and the operation button 3
Since it is possible to selectively operate either one of 4, 35, it can be used for a wide variety of work machine applications. Furthermore, since the accelerator pedal 17 for accelerating the operation of the offset cylinder 9 and the like is provided in parallel, the fine operation and the normal operation of the offset cylinder 9 can be selectively used according to the work content.

FIG. 5 is a characteristic diagram for explaining a working machine operating device of a hydraulic construction machine according to a second embodiment of the present invention. Although the basic construction of the present embodiment is omitted in the drawing, the above-mentioned FIG. 2 is similar to the first embodiment shown in FIGS. 2 and 4, the configuration of this embodiment will be described with reference to these drawings.

In the working machine operating device according to the second embodiment, compared with the working machine operating device of the first embodiment described above, the waveform shaping means 40 previously stores a control map for setting the pressure at a predetermined time. Is different. That is, as a result of waveform shaping of the output signal from the operation button 34 based on the control map by the waveform shaping means 40 of the controller 36, as shown in FIG. 5, when the operation button 34 is turned on at time t ₁ , After the pilot pressure in the offset pilot pipe line 43 rises to the first intermediate pressure P1, it gradually rises at a linear change rate, reaches the second intermediate pressure P2 at time t ₂ , and then remains linear. The pressure gradually increases at a constant change rate and reaches the maximum (FULL) pressure P3 at time t ₃ . Next, when the operation button 34 is turned off at time t ₄ ,
The pilot pressure in the right offset pilot line 43 gradually decreases at a linear change rate, reaches the third intermediate pressure P4 at time t ₅ , and then gradually decreases at a linear change rate for a time. After setting the first intermediate pressure P1 at t ₆ ,
Fall to the lowest level. That is, in order to avoid abrupt changes at the rising and falling edges of the signal waveform, a smooth waveform change is obtained by suppressing the rising and falling conditions. The same applies when the waveform of the output signal from the left offset operation button 35 is shaped.

In the second embodiment constructed as described above, in addition to the same effect as the first embodiment described above, the operation button 3
The pilot pressure immediately after the operation of 4, 35 is relatively low.
Since the intermediate pressure P1 is set to 0, when adjusting the offset position, for example, when the operation button 34 or 35
By repeating the N operation in a short intermittent manner, the operating speed of the offset cylinder 9 can be suppressed, so-called inching characteristics can be obtained, and the alignment can be easily performed. Further, when the operation buttons 34 and 35 are turned on for a predetermined time or longer, the pilot pressure becomes the maximum pressure P3, so that the operating speed of the offset cylinder 9 can be increased. Despite the output of the ON / OFF signal that changes abruptly when falling, the fine operation and the normal operation can be selectively used by adjusting the ON operation time as described above.

[0035]

As described above, according to the present invention,
Operation of a button-type switch located on the grip of the operating lever
Sometimes, not only the switch can be easily operated by hand gripping the operation lever while maintaining a stable posture, switch
The ON / OFF output signal from the switch can be shaped to reduce the shock at the time of starting and stopping the actuator. On the other hand, at the time of the stepping operation by the foot-operated operation pedal , it can be adjusted according to the operation amount. Since the control signal is output, the actuator can be operated at a desired operation speed according to the pedal operation , and moreover, these button type switches and foot pedals can be operated.
It is possible to operate the same actuator with the
Therefore, depending on the work content, button-type switches and foot-operated
A wide variety of work can be performed by selecting and operating the work pedal.
It can be used for machine applications .

In addition, an electromagnetic proportional valve that opens and closes in response to a control signal from the controller is provided in the pilot line for guiding the pilot oil to the actuator flow control valve operated by the switch, whereby the pilot control circuit is formed. It can be applied to equipped hydraulic construction machines.

[0037]

If a foot-operated accelerator pedal for accelerating the actuator operated by the switch is installed in parallel, the operation speed of the attachments can be selected by selectively operating the foot-operated accelerator pedal. And high-speed operation can be used properly.

When the actuator operated by the switch is an offset cylinder, a part of the working machine can be moved laterally by operating the switch, and the actuator is applied to a small swing hydraulic excavator having an offset cylinder. Can be achieved.

[Brief description of drawings]

FIG. 1 is a hydraulic circuit diagram of a hydraulic excavator including a work implement operating device for a hydraulic construction machine according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing the overall configuration of the work machine operating device of FIG.

3 is a characteristic diagram illustrating a correlation between the operation of an operation button provided in the work machine operation device of FIG. 1 and a control pilot pressure.

FIG. 4 is an explanatory view of the inside of a cab of the hydraulic excavator.

FIG. 5 is a characteristic diagram illustrating a waveform shaping means provided in a work machine operating device for a hydraulic construction machine according to a second embodiment of the present invention.

FIG. 6 is a side view showing the overall configuration of a conventional hydraulic excavator.

FIG. 7 is an explanatory view of the inside of a cab of the hydraulic excavator.

[Explanation of symbols]

3a seat 8 boom cylinders 9 Offset cylinder 11 bucket cylinders 12 Operation lever 12a grip 16 foot pedal 17 Foot-operated accelerator pedal 23-26 Flow control valve 34, 35 operation buttons 36 controller 37, 38 Solenoid proportional valve 39 Input section 40 Waveform shaping means 41 Output section 43 Right offset pilot line 44 Shuttle valve 45 Left offset pilot line 46 Shuttle valve

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsuo Kihara               Hitachi Construction Machinery, 650 Kandamachi, Tsuchiura City, Ibaraki Prefecture               Tsuchiura Factory Co., Ltd. (72) Inventor Toshiaki Nishida               Hitachi Construction Machinery, 650 Kandamachi, Tsuchiura City, Ibaraki Prefecture               Tsuchiura Factory Co., Ltd. (72) Inventor Hiroshi Watanabe               Hitachi Construction Machinery, 650 Kandamachi, Tsuchiura City, Ibaraki Prefecture               Tsuchiura Factory Co., Ltd. (72) Inventor Hiroyuki Adachi               Hitachi Construction Machinery, 650 Kandamachi, Tsuchiura City, Ibaraki Prefecture               Tsuchiura Factory Co., Ltd. (72) Inventor Masakazu Haga               Hitachi Construction Machinery, 650 Kandamachi, Tsuchiura City, Ibaraki Prefecture               Tsuchiura Factory Co., Ltd. (72) Inventor Kazuhiro Shibamori               Hitachi Construction Machinery, 650 Kandamachi, Tsuchiura City, Ibaraki Prefecture               Tsuchiura Factory Co., Ltd.                (56) Reference JP-A-2-108731 (JP, A)                 JP-A-3-293432 (JP, A)                 JP-A-7-292726 (JP, A)                 JP-A-4-41823 (JP, A)                 JP-A-6-146325 (JP, A)                 JP-A-5-180336 (JP, A)                 Actual Development Sho 60-108801 (JP, U)                 Actual Kaihei 6-67273 (JP, U)

Claims (4)

(57) [Claims] 1. A main body having a driver's cab, a working machine rotatably provided on a side of the driver's cab of the main body, and a plurality of actuators for respectively driving respective members constituting the working machine. A working machine operating device for a hydraulic construction machine, comprising: a plurality of flow rate control valves that respectively control the flow rates of hydraulic oil supplied to these actuators; and an operating lever that operates at least one of the plurality of actuators. , Which is installed at the grip of this operating lever and is separate from the actuator operated by this operating lever.
And switch button-type ON · OFF switching operating the actuator, activation of the actuator that is operated by the switch, and the rising degree of the output signal of the ON · OFF from the switch to reduce the stop time of the shock
A controller that has a waveform shaping unit that performs a waveform shaping that suppresses a fall condition to smooth a waveform change, and outputs a control signal that controls the operation of the flow control valve based on the waveform shaped output signal; A foot-operated operation pedal that is provided separately from the switch, operates an actuator operated by the switch, and outputs a signal according to an operation amount as a control signal of the flow rate control valve, and ON / OFF control by the switch A selection unit that selects either one of a signal and a control signal corresponding to an operation amount by the foot-operated pedal, and the same actuator can be operated by the switch and the foot-operated pedal. A work machine operating device for hydraulic construction machinery. 2. The electromagnetic proportional valve which opens and closes based on a control signal from the controller is provided in a pilot line for guiding pilot oil to a flow control valve for an actuator operated by the switch. A working machine operating device for hydraulic construction machines characterized by being installed. 3. A working machine operating device for a hydraulic construction machine according to claim 1 or 2, wherein a foot-operated accelerator pedal for accelerating the operation of the actuator operated by the switch is provided in parallel. 4. The working machine operating device for a hydraulic construction machine according to claim 1, wherein the actuator operated by the switch is an offset cylinder.