JP2005054497A - Operating device for construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operating device for construction machinery capable of quickly changing over the supply and discharge of a pressure oil for hydraulic equipment when the hydraulic equipment on the outside is arranged at a place comparatively remote from the construction machinery. <P>SOLUTION: In the operating device for construction machinery with a hydraulic pump 24, a pressure-oil extraction ports 25a and 25b for supplying and discharging the pressure oil to and from a hand breaker 26, a hydraulic pilot type control valve 38 for external equipment controlling the flow of the pressure oil from the pump 24 to the hand breaker 26, electromagnetic proportional pressure-reducing valves 40A and 40B outputting an operating pilot pressure respectively, an operating device 35 outputting a first electric operating signal V<SB>a</SB>and a controller 36, the operating device 37 for a remote place movably mounted near the hand breaker 26 and outputting a second electric operating signal V<SB>b</SB>is installed. The controller 36 generates a driving signal S<SB>a</SB>or S<SB>b</SB>corresponding to either of the first electric operating signal V<SB>a</SB>or the second electric operating signal V<SB>b</SB>and outputs the signal to the electromagnetic proportional pressure-reducing valves 40A and 40B. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a construction machine capable of supplying and discharging pressure oil discharged from a mounted hydraulic pump to an external hydraulic device, and in particular, operation of a construction machine that operates pressure oil supply and discharge of an external hydraulic device. Relates to the device.

  For example, a hydraulic excavator that is one of construction machines includes a lower traveling body, an upper revolving body that is pivotably provided on the lower traveling body, and a boom, arm, and And an articulated front device including a work tool (for example, a bucket, hereinafter simply referred to as a bucket).

  The lower traveling body, the upper swing body, and the front device constitute a driven member of a hydraulic drive device provided in the hydraulic excavator. This hydraulic drive device generally includes a prime mover such as an engine, a plurality of hydraulic pumps driven by the prime mover, and boom hydraulic cylinders that respectively drive the boom, arm, and bucket with pressure oil discharged from the hydraulic pump, An arm hydraulic cylinder, a bucket hydraulic cylinder, a traveling hydraulic motor that causes the lower traveling body to travel by the pressure oil discharged from the hydraulic pump, and the upper swing body is lowered by the pressure oil discharged from the hydraulic pump A plurality of hydraulic actuators including a turning hydraulic motor for turning the traveling body, and operating means for operating each of the plurality of hydraulic actuators are provided.

  By the way, conventionally, there has been known a hydraulic excavator capable of supplying and discharging pressure oil discharged from the hydraulic pump to an external hydraulic device such as a hand breaker (rock drill) or a compactor (compacter). . For example, this hydraulic excavator includes a hydraulic oil outlet for supplying and discharging pressure oil discharged from the hydraulic pump to an external hydraulic device, and a hydraulic pilot for controlling the flow of pressure oil from the hydraulic pump to the hydraulic device. A control valve with a manual operation lever that generates an operation pilot pressure (hydraulic pilot signal) and outputs the operation pilot pressure (hydraulic pilot signal) to the control valve, the pressure oil outlet and the switching valve with a manual operation lever It is provided in the front part of an upper revolving body (for example, refer to patent documents 1). In this prior art, when the manual operation lever is operated to switch the switching valve to a communication state or a shut-off state, a hydraulic pilot signal is input accordingly, and the control valve is switched to a communication state or a shut-off state, The hydraulic oil supply / discharge of hydraulic equipment is switched.

JP 2002-227240 A (pages 5 and 6; FIGS. 2 and 10)

However, the above prior art has room for further improvement as follows.
For example, when an external hydraulic device is placed and operated at a location relatively away from the hydraulic excavator, the operator first drives the hydraulic excavator engine, then moves to the vicinity of the hydraulic device and is provided in this hydraulic device. Confirm that the operating means is in the OFF state. Thereafter, when the operator moves to the hydraulic excavator and operates the manual operation lever to switch the switching valve to the communication state, the operation pilot pressure from the switching valve is input and the control valve is switched to the communication state. The pressure oil discharged from the hydraulic pump is supplied to and discharged from an external hydraulic device. Then, the worker moves to the vicinity of the hydraulic equipment, and operates the hydraulic equipment by operating the operation means provided in the hydraulic equipment to the ON state.
As described above, in the above-described prior art, since the operator moves between the hydraulic excavator and the external hydraulic device in order to operate the external hydraulic device, the pressure oil supply / discharge of the hydraulic device is slightly switched. There was a problem of taking time.

  An object of the present invention is to provide an operation device for a construction machine that can quickly switch between supply and discharge of hydraulic oil in a hydraulic device when an external hydraulic device is arranged at a relatively remote location from the construction machine. It is in.

  (1) In order to achieve the above object, the present invention provides a hydraulic pump, a pressure oil outlet for supplying and discharging pressure oil discharged from the hydraulic pump to an external hydraulic device, and the hydraulic pump A hydraulic pilot control valve that controls the flow of pressure oil to the hydraulic equipment, an electromagnetic valve that generates a hydraulic pilot signal and outputs the hydraulic pilot signal to the control valve, and a first control valve for operating pressure oil supply / discharge of the hydraulic equipment In an operating device for a construction machine, comprising: a first operating means for outputting one electric operation signal; and a controller for inputting the first electric operation signal from the first operating means. It is provided so that it can move, and it has the 2nd operation means which outputs the 2nd electric operation signal for carrying out remote operation of the pressure oil supply and discharge of the hydraulic equipment to the controller, The controller has the 1st electric operation Signal or the second It generates a drive signal according to one of the electrical operation signal, and outputs the drive signal to the solenoid valve.

  In the present invention, for example, when operating an external hydraulic device disposed at a location relatively distant from the construction machine, the operator first drives the engine of the construction machine, and then the second operating means is used as the hydraulic device. It moves to the vicinity and confirms that the operation means provided in the hydraulic equipment is in the OFF state. Thereafter, when the operator operates the second operating means, a second electric operation signal corresponding to this is input to the controller, a corresponding drive signal is output to the electromagnetic valve, and a hydraulic pilot signal from the electromagnetic valve is input. Then, the control valve is switched to the communication state. As a result, the pressure oil from the hydraulic pump is supplied to and discharged from an external hydraulic device. Then, the operator operates the hydraulic device by operating the operation means provided in the hydraulic device to the ON state.

  In this way, since the second operating means arranged in the vicinity of the external hydraulic equipment is operated, the construction machine and the external hydraulic equipment are not moved back and forth in order to operate the first operating means. Pressure oil supply / discharge can be started quickly. In addition, if the hose connecting the hydraulic equipment and the pressure oil outlet is disconnected or broken during operation, the hydraulic fluid supply / discharge of the hydraulic equipment should be stopped quickly by operating the second operating means. Can do.

  (2) In the above (1), preferably, the second operation means outputs the second electric operation signal via an output wiring connected to the controller.

  (3) In the above (1), and preferably, the second operation means includes a transmitter that transmits the second electric operation signal as a radio signal, and the controller receives the signal from the transmitter. The wireless signal is received by a receiver, and the second electric operation signal from the receiver is input.

  (4) In order to achieve the above object, the present invention also includes a hydraulic pump, a pressure oil outlet for supplying and discharging pressure oil discharged from the hydraulic pump to an external hydraulic device, and the hydraulic pump. A construction machine comprising a hydraulic pilot control valve that controls the flow of pressure oil to the hydraulic equipment, and third operating means that outputs a hydraulic operation signal for operating the pressure oil supply / discharge of the hydraulic equipment. And a fourth operating means that is movably provided in the vicinity of the hydraulic equipment and that outputs an electrical operation signal for remotely operating the hydraulic oil supply / discharge of the hydraulic equipment, and the fourth operating means. A controller that generates a drive signal in response to the electrical operation signal, an electromagnetic valve that generates a hydraulic pilot signal in response to the drive signal from the controller, and the hydraulic operation signal or the electromagnetic signal from the third operating means Valve And selecting means for outputting to the control valve by selecting one of the hydraulic pilot signal.

  (5) In the above (4), preferably, the fourth operation means outputs the electric operation signal via an output wiring connected to the controller.

  (6) In the above (4), and preferably, the fourth operation means includes a transmitter that transmits the electric operation signal as a radio signal, and the controller receives the radio signal from the transmitter. Is received by a receiver, and the electric operation signal from the receiver is input.

  (7) In any one of the above (1) to (6), preferably, the control valve controls a flow rate of pressure oil from the hydraulic pump to the hydraulic device.

  According to the present invention, when an external hydraulic device is disposed at a location relatively distant from the construction machine, the pressure oil supply / discharge of the hydraulic device can be quickly switched.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  A first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a side view showing the entire structure of a small hydraulic excavator (mini excavator) to which the operating device for a construction machine according to the present embodiment is applied, and FIG. 2 is a front view as seen from the direction of arrow II in FIG. It is a figure (however, the below-mentioned front apparatus and blade for earth removal are not shown). Hereinafter, when the operator is seated in the driver's seat with the excavator shown in FIG. 1, the front side (left side in FIG. 1), rear side (right side in FIG. 1), left side (paper surface in FIG. 1). The front side) and the right side (back side toward the paper surface in FIG. 1) are simply referred to as front side, rear side, left side, and right side.

  1 and 2, this hydraulic excavator is a relatively small so-called offset type hydraulic excavator, and is a lower traveling body provided with left and right endless track shoes (crawlers) 1L and 1R as traveling means. 2, an upper swing body 3 that is pivotably mounted on the upper part of the lower traveling body 2, and a pivot frame 4 that forms the basic lower structure of the upper swing body 3. An articulated front device 5, a so-called canopy-type cab 6 provided on the turning frame 4, and an upper cover 7 that covers most of the cab 6 other than the cab 6 on the turning frame 4 are provided.

  The lower traveling body 2 includes a substantially H-shaped track frame 8 and drive wheels 9L and 9R rotatably supported near the rear ends of the left and right sides of the track frame 8 (only 9L is shown in FIG. 1). Left and right traveling hydraulic motors 10L and 10R for driving the drive wheels 9L and 9R (only 10L is shown in FIG. 1), and rotatably supported in the vicinity of the front ends of the left and right sides of the track frame 8, Driven wheels (idlers) 11L, 11R (only 11L shown in FIG. 1) rotated by the driving force of the drive wheels 9L, 9R via the footwear 1L, 1R, and the front side of the track frame 8 can be moved up and down. And a blade 12 for earth removal that moves up and down by a blade hydraulic cylinder (not shown). Further, a swivel bearing (swivel wheel) 13 is disposed in the center of the lower traveling body 2, and a turning hydraulic motor (not shown) for turning the turning frame 4 relative to the lower traveling body 2 in the vicinity of the center of the turning wheel 13. Z) is built-in.

  The front device 5 includes a lower boom 14 that is coupled to the revolving frame 4 so as to be pivotable in a vertical direction (up and down), and an upper boom 15 that is coupled to a front end portion of the lower boom 14 so as to be pivotable in the horizontal direction. An arm cylinder bracket 16 connected to the distal end portion of the upper boom 15 so as to be pivotable in the left-right direction, an arm 17 coupled to the distal end portion of the arm cylinder bracket 16 so as to be pivotable in the vertical direction, and the arm 17 The lower boom 14 together with the bucket 18, which is coupled to the front end portion of the lower boom 14, the stay 19 connecting the lower boom 14 and the arm cylinder bracket 16, the boom hydraulic cylinder 20 that drives the lower boom 14, and the upper boom 15. Is connected to the right and left in a pivotable manner so as to drive the upper boom 15. And da 21, and the arm hydraulic cylinder 22 for driving the arm 17, and a bucket hydraulic cylinder 23 for driving the bucket 18.

  In the front device 5 configured in this manner, when the offset hydraulic cylinder 21 is extended, the upper boom 15 is turned by the stay 19 with the arm cylinder bracket 16 always facing the front of the hydraulic excavator. Yes. That is, the upper boom 15 is turned in the left-right direction with the arm cylinder bracket 16, the arm 17, and the bucket 18 facing forward.

  The upper cover 7 includes an engine (not shown), a fuel tank (not shown) for storing liquid fuel of the engine, and a plurality of hydraulic actuators driven by the engine (specifically, the left and right travels). Driving hydraulic motors 10L, 10R, turning hydraulic motor, blade hydraulic cylinder, boom hydraulic cylinder 20, offset hydraulic cylinder 21, arm hydraulic cylinder 22, bucket hydraulic cylinder 23, etc. A plurality of hydraulic pumps 24 (see FIG. 3 to be described later) for discharging the pressure oil to be discharged and hydraulic oil tanks (not shown) serving as a pressure oil source for these hydraulic pumps 24 are housed.

  The upper swing body 3 (in FIGS. 1 and 2, on the front side of the upper swing body 3) is provided with pressure oil outlets 25 a and 25 b for supplying and discharging the pressure oil from the hydraulic pump 24 to the outside. In addition, for example, a hand breaker 26 is connected to these pressure oil outlets 25a and 25b as external hydraulic equipment via hoses 27a and 27b, so that pressure oil from the hydraulic pump 24 can be supplied and discharged.

  The cab 6 is provided on the left side of the turning frame 4 and includes a seat (driver's seat) 28 on which an operator is seated and a lever stand 29 provided in front of the seat 28.

  On the top of the lever stand 29, left and right traveling manual operation levers 30L and 30R are provided for driving the left and right traveling hydraulic motors 10L and 10R, respectively, so that the hydraulic excavator moves forward or backward. . The left traveling manual operation lever 30L is further moved to the left or right to drive the turning hydraulic motor to turn the upper turning body 3 to the left or right and to the front or rear. The arm hydraulic cylinder 22 is driven and the arm 17 is dumped or clouded, and a cross operation type turning / arm manual operation lever 31L is provided. On the further right side of the right travel manual operation lever 30R, the bucket hydraulic cylinder 23 is driven by operating the left or right side to cause the bucket 18 to cloud or dump, and the boom hydraulic cylinder is operated by operating the front or rear side. A cross-operated bucket / boom manual operation lever 31R for driving 20 and lowering or raising the lower boom 14 is provided. On the right side of the lever stand 29, there is provided a blade manual operation lever 32 for driving the blade hydraulic cylinder and moving the blade 12 for earth removal vertically.

  At the front lower part of the seat 28 on which the operator is seated, an offset operating pedal 33 for driving the offset hydraulic cylinder 21 and turning the upper boom 15 to the left or right, and pressure oil discharged from the hydraulic pump 24 An electric lever type operating device 35 (see FIG. 3 to be described later) provided with an external device operating pedal 34 (see FIG. 3 to be described later) is provided. Further, a controller 36 (see FIG. 3), which will be described later, is housed below the seat 28.

  Here, as a major feature of the present embodiment, a remote operation device 37 for remotely operating the pressure oil supply / discharge of the hand breaker 26 is stored, for example, on the front side of the upper swing body 3 (see FIG. 1). For example, even when the hand breaker 26 is disposed at a position relatively distant from the excavator, the remote operation device 37 can be moved to the vicinity of the hand breaker 26 (for details, refer to FIG. 2 described later).

  FIG. 3 is a block diagram showing detailed functions of the controller 36 related to the electric lever type operating device 35 and the remote operating device 37 together with FIG.

In FIG. 3, the hydraulic pump 24, the pressure oil outlets 25a and 25b for supplying and discharging the pressure oil discharged from the hydraulic pump 24 to the outside, and the pressure oil outlets 25a and 25b are connected to the hose. 27a and 27b, the hand breaker 26, a hydraulic pilot type external device control valve 38 for controlling the flow of pressure oil from the hydraulic pump 24 to the hand breaker 26, and the pressure oil supply / discharge of the hand breaker 26. The electric lever type operating device 35 provided with the external device operating pedal 34 for operating the engine, a pilot pump 39 as a hydraulic source, and a hydraulic pilot signal (secondary pilot based on the discharge pressure of the pilot pump 39) proportional pressure reducing solenoid valve 40A for outputting a pressure) _{P x,} and 40B, and the controller 36, the hand breakers 26 near The remote operation device 37 for remotely operating the pressure oil supply / discharge of the hand breaker 26 is provided.

The operation device 35 includes the operation pedal 34 for external equipment and a potentiometer 41 that detects the displacement of the operation pedal 34. The potentiometer 41 is a first electric device corresponding to the displacement of the operation pedal 34. operation signal and outputs an (operation command signal) V _a to the controller 36. Although not shown, the external device operation pedal 34 may be provided with a displacement fixing means for fixing the displacement.

The remote operation device 37 includes, for example, a push button type operation switch 42a for instructing start of pressure oil supply / discharge of the hand breaker 26, and a push button type stop switch for instructing end of pressure oil supply / discharge of the hand breaker 26. 42b, a rotary operation type dial 42c that instructs to adjust the flow rate of the pressure oil introduced into the hand breaker 26 within a range from a predetermined maximum value to a predetermined minimum value, and a potentiometer that detects the displacement of the dial 42c. Meter (not shown). Then, the input signal from the operation switch 42a or the stop switch 42b and the operation amount signal from the potentiometer according to the displacement of the dial 42c are used as the second electric operation signal _Vb through the output wiring 43 to the controller 36. Is output. Further, the remote operation device 37 can be disposed at a position relatively away from the hydraulic excavator while the output wiring 43 and the like are wound and stored and stored in the upper swing body 3 and the output wiring 43 and the like are extended. (See FIG. 1 and FIG. 2 described above).

The controller 36 includes a power supply unit 45 connected to a battery (power supply) 44, an input unit 46 for inputting _a first electric operation signal Va from the potentiometer 41 of the operation device 35, and a remote operation device 37. a communication port 47 for inputting the second electrical operating signal V _b of the first and second electric operation signals V _a, respectively in a predetermined arithmetic processing (detail based on V _b, see metering table and, a control unit 48 that performs that) for calculating the output target value of the electromagnetic proportional pressure reducing valve which will be described later, one of the first driving signal S _a or the second driving signal S _b generated by the control unit 48 It is comprised with the output part 49 output to solenoid drive part 40Aa, 40Ba of electromagnetic proportional pressure reducing valve 40A, 40B.

Solenoid proportional pressure reducing valves 40A, 40B, based on the first driving signal S _a or the second driving signal S _b from the output unit 49 of the controller 36 and vacuum the primary pilot pressure introduced from the pilot pump 39 A hydraulic pilot signal (secondary pilot pressure) _Px is generated. Then, the generated hydraulic pilot signals P _x a pilot operation portion 38a of the external device control valve 38, and outputs to 38b, thereby adapted to switch the external device control valve 38 to the communicating position 38A or blocking position 38B Yes.

  The hand breaker 26, for example, reciprocates by a switching valve 50 having a manual operation lever 50a, a breaker hydraulic cylinder 51 into which pressure oil is introduced via the switching valve 50, and driving of the breaker hydraulic cylinder 51. A striking rod 52 (see FIGS. 1 and 2 described above) is provided. When the manual operation lever 50a is operated to switch the switching valve 50 to the communication position 50A and the pressure oil from the hydraulic pump 24 is introduced, the breaker hydraulic cylinder 51 is driven and the striking rod 52 is reciprocated. It is supposed to be. Further, when the manual operation lever 50a is operated in the OFF state, the switching valve 50 is switched to the cutoff position 50B, and when the pressure oil from the hydraulic pump 24 is shut off, the striking rod 52 is stopped.

  Next, the control procedure of the controller 36 related to the pressure oil supply / discharge of the hand breaker 26 will be described. FIG. 4 is a flowchart showing the control processing contents (program) of the controller 36.

In FIG. 4, first, at step 100, receives the first electrical operation signal V _a from the operation device 35, the routine proceeds to step 110, predetermined arithmetic processing based on the first electrical operation signals V _a is performed and to generate a first driving signal S _a. Then, the process proceeds to step 120, where the second electric operation signal _Vb from the remote operation device 37 is input, and the process proceeds to step 130, where the operation switch 42a of the remote operation device 37 is finally pressed. (In other words, whether or not the stop switch 42b is pressed after the operation switch 42a is pressed) is determined by signals from the operation switch 42a and the stop switch 42b.

If the operation switch 42a has been pressed last (in other words, after the operation switch 42a has been pressed and the stop switch 42b has not been pressed), the determination at step 130 is satisfied and the routine proceeds to step 140. In step 140, a predetermined calculation process is performed based on the second electrical operation signal V _b, and generates a second driving signal S _b. Then, the process proceeds to step 150, and the larger one of the first and second drive signals S _a and S _b is selected and output to the solenoid drive units 40Aa and 40Ba of the electromagnetic proportional pressure reducing valves 40A and 40B. . When step 150 ends, the process returns to step 100 and the same procedure is repeated.

On the other hand, if the operation switch 42a has not been pressed last (in other words, after the stop switch 42b has been pressed or the operation switch 42a has not been pressed from the beginning), the determination in step 130 is not satisfied, and the process returns to step 160. Move. In step 160, it generates a second driving signal _{S b} as a stop signal (driving current value = 0). Then, the process proceeds to step 150 to select the first drive signal _{S a} large drive current value, and outputs the solenoid proportional pressure reducing valves 40A, 40B of the solenoid driving 40Aa, the 40Ba. When step 150 ends, the process returns to step 100 and the same procedure is repeated.

  In the above, the hand breaker 26 constitutes an external hydraulic device described in each claim, and the external device control valve 38 constitutes a hydraulic pilot control valve described in each claim. The operation device 35 constitutes a first operation means for outputting a first electric operation signal for operating pressure oil supply / discharge of the hydraulic equipment, and the remote operation device 37 can be moved to the vicinity of the hydraulic equipment. And a second operation means for outputting a second electric operation signal for remotely controlling the pressure oil supply / discharge of the hydraulic equipment.

  Next, the operation and effect of this embodiment will be described.

For example, when operating the hand breaker 26 disposed relatively far from the excavator, first, the operator drives the engine of the excavator and then moves the remote operation device 37 to the vicinity of the hand breaker 26. It is confirmed that the operation lever 50a of the hand breaker 26 is in the OFF state. Thereafter, when the operator depresses the operation switch 42a of the remote operation device 37, the second electrical operation signal _Vb from the remote operation device 37 is sent to the controller 36 through steps 100 and 110 in FIG. Is input. Then, the determination in step 130 is satisfied, in step 140, the controller 36 generates a second driving signal _{S b} on the basis of the second electrical operation signal _{V b,} in step 150, the second driving signal _{S b} the electromagnetic proportional pressure reducing valve 40A, and outputs to 40B (in this case, since the operation pedal 34 for external equipment is not operated, the first driving generated based on the first electrical operation signal V _a from the operating device 35 driving current value of the signal _{S a} is zero). In this way, the solenoid proportional pressure reducing valve 40A is driven, hydraulic pilot signals P _x pilot operating unit 38a of the external device control valve 38 that is generated by 40B, is input to 38b, whereby the control valve 38 is the external device The communication position is switched to the communication position 38A, and the pressure oil from the hydraulic pump 24 is introduced into the hand breaker 26. Then, the operator operates the operation lever 50a of the hand breaker 26 to the ON state to operate the hand breaker 26.

  In this way, since the operation switch 42a of the remote operation device 37 disposed in the vicinity of the hand breaker 26 is operated, the hydraulic excavator and the hand breaker 26 are operated to operate the external device operation pedal 34 in the cab 6. The pressure oil supply / discharge of the hand breaker 26 can be started quickly. When adjusting the flow rate of the pressure oil introduced into the hand breaker 26, the flow rate of the pressure oil introduced into the hand breaker 26 can be quickly adjusted by operating the dial 42c of the remote operation device 37.

Also, if the hoses 27a, 27b connecting the hand breaker 26 and the pressure oil outlets 25a, 25b are disconnected or broken during the work, the operator presses the stop switch 42b of the remote operation device 37. 4, the determination of step 130 is not satisfied through steps 100, 110, and 120 of FIG. 4. In step 160, the controller 36 generates the second drive signal S _b as a stop signal (drive current value = 0), in step 150, outputting a second driving signal _{S b} solenoid proportional pressure reducing valve 40A, the 40B (in this case, the drive current value is also zero in the first driving signal _{S a} as described above). In this way, the solenoid proportional pressure reducing valve 40A is driven, hydraulic pilot signals P _x pilot operating unit 38a of the external device control valve 38 that is generated by 40B, is input to 38b, whereby the control valve 38 is the external device The operation is switched to the shut-off position 38B, and the pressure oil from the hydraulic pump 24 is shut off.
In this way, the stop switch 42b of the remote operation device 37 disposed in the vicinity of the hand breaker 26 is operated, so that the pressure oil supply / discharge of the hand breaker 26 can be stopped quickly.

In the first embodiment, the configuration in which the second electric operation signal _Vb from the remote operation device 37 is output to the controller 36 via the output wiring 43 is described as an example, but the present invention is not limited to this. FIG. 5 is a block diagram showing the detailed functions of the controller 36 related to the remote operation device according to the first modification. In addition, the same code | symbol is attached | subjected to the part equivalent to the said 1st Embodiment, and description is abbreviate | omitted.

In this modified example, the remote operation device 53 includes the operation switch 42 a, the stop switch 42 b, the dial 42 c, and the potentiometer, as well as the remote operation device 37. Instead, a transmitter 54 that transmits the second electric operation signal _Vb as a radio signal X is provided. Then, the radio signal X from the transmitter 54 is received by the receiver 55 provided in the hydraulic excavator, and the second electric operation signal _Vb from the receiver 55 is input to the communication port 47 of the controller 36. .

  Also in this modified example configured as described above, as in the first embodiment, when the hand breaker 26 is disposed at a location relatively distant from the hydraulic excavator, the remote operation device 53 disposed in the vicinity of the hand breaker 26 is used. , The pressure oil supply / discharge of the hand breaker 26 can be quickly switched.

A second embodiment of the present invention will be described with reference to FIG.
This embodiment is an embodiment applied to a hydraulic excavator provided with a hydraulic pilot type operating device for operating pressure oil supply / discharge of an external hydraulic device.

  FIG. 6 is a block diagram showing the detailed functions of the controller related to the operation device of the construction machine according to the present embodiment. In addition, the same code | symbol is attached | subjected to the part equivalent to the said 1st Embodiment, and description is abbreviate | omitted.

In the present embodiment, a hydraulic pilot type operating device 57 including an external device operating pedal 56 for operating the pressure oil supply / discharge of the hand breaker 26 is provided in the cab 6. The operation device 57 outputs a pair of the operation pedal 56 and a hydraulic operation signal (secondary pilot pressure) P _y that reduces the primary pilot pressure from the pilot pump 39 according to the displacement of the operation pedal 56. Pressure reducing valves 58a and 58b are provided. Further, hydraulic operation signal lines 59a and 59b are connected to the shuttle valves 60A and 60B from the pressure reducing valves 58a and 58b, respectively.

Controller 61, with the power supply unit 45 connected to the battery 44, and the communication port 47 for inputting the electric operation signal V _b from the remote manipulation device 37, based on the electrical operating signal V _b predetermined and the control unit 48 that performs arithmetic processing, is composed of the above-described output unit 49 for outputting a drive signal _{S b} generated by the control unit 48 the solenoid proportional pressure reducing valves 40A, 40B of the solenoid drive unit 40Aa, to 40Ba ing. Also, hydraulic pilot signal lines 62a and 62b are connected to the shuttle valves 60A and 60B from the electromagnetic proportional pressure reducing valves 40A and 40B, respectively.

Shuttle valve 60A, 60B, the vacuum valve 58a, to select the high-pressure side of the hydraulic pilot signals _{P x} from hydraulic operation signal _{P y} and the solenoid proportional pressure reducing valves 40A, 40B from the 58b, the maximum operation signal conduit 63a, It is output to the pilot operating portions 38a, 38b of the external device control valve 38 via 63b.

  In the present embodiment, the operating device 57 constitutes a third operating means for outputting a hydraulic operation signal for operating the pressure oil supply / discharge of the hydraulic equipment described in each claim, and the remote operating device 37 has each A fourth operating means is provided which is provided so as to be movable in the vicinity of the hydraulic equipment described in the claims, and which outputs an electrical operation signal for remotely operating the hydraulic oil supply / discharge of the hydraulic equipment. The shuttle valves 60A and 60B constitute selection means for selecting either the hydraulic operation signal from the third operation means or the hydraulic pilot signal from the electromagnetic valve and outputting it to the control valve.

In the present embodiment configured as described above, when the operation switch 42a or the stop switch 42b of the remote operation device 37 is operated, the electric operation signal _Vb from the remote operation device 37 is input to the controller 61, and the controller 61 61 generates a drive signal _{S b} on the basis of the electric operation signal _{V b,} and outputs the drive signal _{S b} solenoid proportional pressure reducing valve 40A, the 40B. In this way, the solenoid proportional pressure reducing valve 40A is driven, hydraulic pilot signals _{P x} produced by 40B are hydraulic pilot signal line 62a, 62b, the shuttle valve 60A, 60B, and the maximum operation signal conduit 63a, and 63b To the pilot operating portions 38a and 38b of the external device control valve 38, thereby switching the external device control valve 38 to the communication position 38A or the shut-off position 38B and switching the pressure oil supply / discharge of the hand breaker 26. It has become.

  Accordingly, in this embodiment as well, as in the first embodiment and the first modification example, when the hand breaker 26 is disposed at a location relatively away from the hydraulic excavator, the pressure oil supply / discharge of the hand breaker 26 is switched. Can be done quickly.

In the second embodiment, the configuration in which the electric operation signal _Vb from the remote operation device 37 is output to the controller 61 via the output wiring 43 is described as an example, but the present invention is not limited to this. FIG. 7 is a block diagram showing detailed functions of the controller 61 related to the remote operation device according to the second modification. In addition, the same code | symbol is attached | subjected to the part equivalent to the said 2nd Embodiment, and description is abbreviate | omitted.

In the present modification, as in the first modification, the remote operation device 53 is provided, and the transmitter 54 of the remote operation device 53 transmits the electric operation signal _Vb as a radio signal X. The radio signal X is received by the receiver 55, and the electric operation signal _Vb from the receiver 55 is input to the communication port 47 of the controller 61.

  Also in this modified example configured as described above, as in the case of the second embodiment, when the hand breaker 26 is disposed at a location relatively distant from the excavator, the remote operation device 53 disposed in the vicinity of the hand breaker 26 is used. , The pressure oil supply / discharge of the hand breaker 26 can be quickly switched.

Although not specifically described in the first and second embodiments and the first and second modified examples, for example, the operation device 35 (or 57) and the remote operation device 37 (or 53). ) May provide an appropriate indicator (for example, an indicator lamp, a buzzer, etc.) at an appropriate part to notify the operator whether or not the operation of the pressure oil supply / discharge of the hand breaker 26 is instructed. At this time, the controller 36 (or 61) outputs, for example, a drive signal generated based on the electric operation signals V _a and V _b to the alarm device to drive the alarm device. Thereby, since the operator can confirm the state of the pressure oil supply / discharge of the hand breaker 26, the safety can be further improved.

  In the first and second embodiments and the first and second modified examples, the hand breaker 26 has been described as an example of the external hydraulic device. However, the present invention is not limited to this. For example, a compactor, an auger, A cutter or the like may be used. Further, the remote operation device 37 (or 53) has been described by taking a configuration including a push button type operation switch 42a, a stop switch 42b, and the like as an example. A possible changeover switch or the like may be used. In these cases, the same effect as described above can be obtained.

  In the first and second embodiments and the first and second modified examples, the offset small hydraulic excavator has been described as an application target of the present invention. However, the swing hydraulic excavator, or Needless to say, the present invention may be applied to non-compact medium and large hydraulic excavators.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing the overall structure of a small hydraulic excavator to which a first embodiment of a construction machine operating device according to the present invention is applied. It is the arrow view front view seen from the arrow II direction in FIG. It is a block diagram showing the detailed function of the controller concerning this together with 1st Embodiment of the operating device of the construction machine of this invention. It is a flowchart showing the control processing content of the controller which comprises 1st Embodiment of the operating device of the construction machine of this invention. It is a block diagram showing the detailed function of the controller concerning this with the 1st modification of the operating device of the construction machine of this invention. It is a block diagram showing the detailed function of the controller concerning this with 2nd Embodiment of the operating device of the construction machine of this invention. It is a block diagram showing the detailed function of the controller concerning this with the 2nd modification of the operating device of the construction machine of this invention.

Explanation of symbols

24 Hydraulic pump 25a Pressure oil outlet 25b Pressure oil outlet 26 Hand breaker (External hydraulic equipment)
35 Operating device (first operating means)
36 Controller 37 Remote operation device (second operation means, fourth operation means)
38 Control valve for external equipment (control valve)
40A Electromagnetic proportional pressure reducing valve 40B Electromagnetic proportional pressure reducing valve 43 Output wiring 53 Remote operation device (second operation means, fourth operation means)
54 transmitter 55 receiver 57 operation device (third operation means)
60A shuttle valve (selection means)
60B Shuttle valve (selection means)
61 controller P _x hydraulic pilot signal P _y hydraulic operation signal S _a first drive signal S _b second drive signal V _a first electric operation signal V _b second electric operation signal X radio signal

Claims (7)

A hydraulic pump, a pressure oil outlet for supplying and discharging pressure oil discharged from the hydraulic pump to an external hydraulic device, and a hydraulic pilot type that controls the flow of pressure oil from the hydraulic pump to the hydraulic device A control valve, an electromagnetic valve that generates a hydraulic pilot signal and outputs the hydraulic pilot signal to the control valve, and a first operating means that outputs a first electric operation signal for operating pressure oil supply / discharge of the hydraulic device; In an operating device for a construction machine comprising a controller for inputting the first electric operation signal from the first operating means,
Provided with a second operating means that is movably provided in the vicinity of the hydraulic device, and outputs a second electric operation signal for remotely operating pressure oil supply / discharge of the hydraulic device to the controller;
The controller generates a drive signal in accordance with either the first electric operation signal or the second electric operation signal, and outputs the drive signal to the electromagnetic valve. apparatus.   2. The construction machine operation device according to claim 1, wherein the second operation means outputs the second electric operation signal via an output wiring connected to the controller. .   2. The construction machine operating device according to claim 1, wherein the second operating means includes a transmitter that transmits the second electric operation signal as a radio signal, and the controller includes the transmitter from the transmitter. An operating device for a construction machine, wherein a radio signal is received by a receiver, and the second electric operation signal from the receiver is input. A hydraulic pump, a pressure oil outlet for supplying and discharging pressure oil discharged from the hydraulic pump to an external hydraulic device, and a hydraulic pilot type that controls the flow of pressure oil from the hydraulic pump to the hydraulic device In an operating device for a construction machine, comprising: a control valve; and third operating means for outputting a hydraulic operation signal for operating pressure oil supply / discharge of the hydraulic equipment.
A fourth operating means that is movably provided in the vicinity of the hydraulic device and outputs an electric operation signal for remotely operating the hydraulic oil supply / discharge of the hydraulic device;
A controller that generates a drive signal in response to the electric operation signal from the fourth operation means;
A solenoid valve that generates a hydraulic pilot signal in response to a drive signal from the controller;
An operation device for a construction machine, comprising: selection means for selecting either the hydraulic operation signal from the third operation means or the hydraulic pilot signal from the electromagnetic valve and outputting the selected signal to the control valve. .   5. The construction machine operation device according to claim 4, wherein the fourth operation means outputs the electric operation signal via an output wiring connected to the controller.   5. The construction machine operation device according to claim 4, wherein the fourth operation means includes a transmitter that transmits the electric operation signal as a radio signal, and the controller receives the radio signal from the transmitter. An operation device for a construction machine, which is received by a receiver and receives the electric operation signal from the receiver. The construction machine operating device according to any one of claims 1 to 6, wherein the control valve controls a flow rate of pressure oil from the hydraulic pump to the hydraulic equipment. .

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