WO2019117223A1

WO2019117223A1 - Construction machine

Info

Publication number: WO2019117223A1
Application number: PCT/JP2018/045773
Authority: WO
Inventors: 沢哉野村; 清悟関口; 滝下　竜夫; 湯上　誠之; 圭佑崎坂
Original assignee: 株式会社日立建機ティエラ
Priority date: 2017-12-14
Filing date: 2018-12-12
Publication date: 2019-06-20
Also published as: JP2019105136A; JP7107676B2

Abstract

The present invention provides a construction machine which can be moved when an authentication of a wireless authentication device cannot be obtained while an engine is being driven, and can suppress the degree of danger when a person, who is not skilled in operation of the construction machine, moves the construction machine. A hydraulic shovel according to the present invention is provided with: a start switch which indicates a startup of an engine through an operation of an operator; a wireless authentication device which performs wireless authentication with a portable key carried by the operator; and a vehicle body controller which starts the engine on the basis of the indication of the start switch and the authentication of the wireless authentication device. The vehicle body controller lowers the RPM of the engine to a preset low RPM when the authentication of the wireless authentication device cannot be obtained while the engine is being driven.

Description

Construction machinery

The present invention relates to a construction machine such as a hydraulic shovel, and more particularly to a construction machine provided with a wireless authentication device that performs wireless authentication with a portable key carried by a driver.

Patent Document 1 is a wireless authentication device that performs wireless authentication between a start switch that instructs starting of an engine by a driver's operation and a portable key possessed by the driver, an instruction of the start switch, and a wireless authentication device. Disclosed is a hydraulic shovel provided with a vehicle controller for starting an engine based on authentication.

The hydraulic shovel of Patent Document 1 generates and outputs a pilot pressure based on the discharge pressure of a pilot pump according to the operation of a plurality of control valves that control the flow of pressure oil to a plurality of hydraulic actuators, respectively, and the driver. , And the pilot switching valve provided between the pilot pump and the plurality of hydraulic pilot valves and switched between the supply position and the blocking position, and the lock position by the driver. And a lock switch for detecting the operation position of the lock lever and outputting the detected position to the vehicle controller.

Then, when the lock lever is in the lock position while the engine is being driven, the vehicle controller controls the pilot switching valve to the shut-off position. As a result, since the plurality of hydraulic pilot valves can not generate the pilot pressure, the driving of the plurality of hydraulic actuators is prohibited. On the other hand, when the lock lever is in the unlocking position while the engine is being driven and the authentication of the wireless authentication device is obtained, the vehicle controller controls the pilot switching valve to the supply position. Thereby, since the plurality of hydraulic pilot valves can generate the pilot pressure, driving of the plurality of hydraulic actuators is permitted.

However, even when the lock lever is in the unlocking position while the engine is being driven, the vehicle body controller controls the pilot switching valve to the blocking position if authentication of the wireless authentication device is not obtained. Thus, when the driver holding the portable key leaves the hydraulic shovel while the engine of the hydraulic shovel is driven (in other words, when the portable key is out of the communication range of the wireless authentication device), the hydraulic actuator Driving can be prohibited, and for example, it is possible to prevent another person who is not ready to operate the hydraulic shovel from moving the hydraulic shovel, and the risk thereof can be avoided.

JP, 2016-118033, A

The above prior art has room for improvement as follows. According to Patent Document 1, even when the lock lever is in the unlocking position while the engine is being driven, the driving of the hydraulic actuator is prohibited if the authentication of the wireless authentication device is not obtained. Therefore, even if the battery of the portable key possessed by the driver is exhausted, for example, the authentication of the wireless authentication device can not be obtained, and the hydraulic shovel is stopped. Alternatively, if the driver loses the portable key at a place away from the hydraulic shovel (in other words, outside the communication range of the wireless authentication device), the hydraulic shovel can not be moved. Even in such a situation, it may be necessary to move the hydraulic shovel because, for example, the hydraulic shovel is in the way.

The present invention has been made in view of the above problems, and its object is to operate a construction machine although it can move the construction machine when authentication of the wireless authentication device can not be obtained while the engine is being driven. The purpose is to provide a construction machine that can reduce the degree of risk when another person who is not using it moves the construction machine.

In order to achieve the above object, the present invention provides an engine, a hydraulic pump driven by the engine, a plurality of hydraulic actuators driven by pressure oil discharged from the hydraulic pump, and an operator's operation. A wireless authentication device for performing wireless authentication between a start switch instructing starting of an engine, and a portable key possessed by a driver, and starting the engine based on an instruction of the start switch and authentication of the wireless authentication device In the construction machine provided with a controller, the controller reduces the number of revolutions of the engine to a preset low speed when the authentication of the wireless authentication device can not be obtained while the engine is being driven. Let

According to the present invention, when authentication of the wireless authentication device can not be obtained while the engine is running, the construction machine can be moved, but another person who is not ready to operate the construction machine moves the construction machine. You can reduce the risk of

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view showing the whole structure of the hydraulic shovel in the 1st Embodiment of this invention. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1 and shows the internal structure of the cab of the hydraulic shovel according to the first embodiment of the present invention. It is a figure showing the composition of the drive device of the hydraulic shovel in a 1st embodiment of the present invention. It is a figure showing the composition of the electric circuit of the hydraulic shovel in a 1st embodiment of the present invention. It is a top view showing the communication range of the radio | wireless authentication apparatus in the 1st Embodiment of this invention. It is a flowchart showing the processing procedure of the vehicle body controller in the 1st Embodiment of this invention. It is a flowchart showing the process sequence of the vehicle body controller in the 1st modification of this invention. It is a figure showing the composition of the drive device of the hydraulic shovel in a 2nd embodiment of the present invention. It is a figure showing the composition of the electric circuit of the hydraulic shovel in a 2nd embodiment of the present invention. It is a flowchart showing the process sequence of the vehicle body controller in the 2nd Embodiment of this invention. It is a flowchart showing the process sequence of the vehicle body controller in the 2nd modification of this invention.

Hereinafter, an embodiment of the present invention will be described by taking a hydraulic shovel as an example to which the present invention is applied. 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 the hydraulic shovel in the present embodiment. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1 and shows the internal structure of the cab of the hydraulic shovel in the present embodiment. From the front, the driver's seat on the driver's seat in the driver's cab (left side in FIGS. 1 and 2), rear (right side in FIGS. 1 and 2), left (lower side in FIG. 2), right (figure) 2) The upper side is simply referred to as front side, rear side, left side, right side.

The hydraulic shovel according to the present embodiment is a mini shovel having a mechanical mass of less than 6000 kg and is used, for example, for work in a narrow place such as a city area. This hydraulic shovel includes a self-propelled lower traveling unit 1 and an upper revolving unit 2 rotatably provided on the upper side of the lower traveling unit 1, and the lower traveling unit 1 and the upper revolving unit 2 serve as vehicle bodies. Configured. The upper swing body 2 is swung by a swing motor 3 (see FIG. 3 described later).

The undercarriage 1 includes an H-shaped track frame 4 as viewed from above. A drive wheel 5 and an idler wheel 6 are provided on the left side of the track frame 4, and a crawler belt 7 on the left side is wound around them. The left driving wheel 5 is rotated by the left traveling motor 8 (see FIG. 3 described later), whereby the left crawler belt 7 is driven. Further, although not shown, drive wheels and idle wheels are also provided on the right side of the track frame 4, and the crawler belt on the right side is wound around them. The right drive wheel is rotated by the right travel motor (not shown), which drives the right track.

A working device 9 is connected to the front side of the upper swing body 2. The work device 9 is swingably connected to the swing post 10 in the vertical direction, with the swing post 10 rotatably connected in the lateral direction on the front side of the upper swing body 2 (specifically, the swing frame 17 described later). The boom 11, the arm 12 rotatably connected to the boom 11 in the vertical direction, and the bucket 13 rotatably connected to the arm 12 in the vertical direction are provided. The swing post 10 is rotated by a swing cylinder (not shown). The boom 11, the arm 12 and the bucket 13 are respectively rotated by the boom cylinder 14, the arm cylinder 15 and the bucket cylinder 16.

The upper swing body 2 includes a swing frame 17 forming a foundation structure, a cab type cab 18 provided on the left side of the swing frame 17, a fuel tank and a hydraulic oil tank provided on the right side of the swing frame 17 (see FIG. Not shown), a counterweight 19 provided at the rear end of the swing frame 17, and an exterior cover 21 covering equipment (specifically, the engine 20 etc.) mounted on the swing frame 17.

In the driver's cab 18, a driver's seat 22 on which the driver is seated is provided. Driving operation levers and

pedals

23A and 23B are provided on the front side of the driver's seat 22, and the operation levers and

pedals

23A and 23B instruct the traveling operation of the lower traveling body 1 by the operation of the driver in the front-rear direction. An optional control pedal 24A is provided on the left side of the travel control lever / pedal 23A. A swing control pedal 24B is provided on the right side of the travel control lever / pedal 23B, and the control pedal 24B instructs the operation of the swing post 10 by the driver's left / right operation.

The operation control lever 25A is provided on the left side of the driver's seat 22, and the operation lever 25A instructs the turning operation of the upper swing body 2 by the operation of the driver in the left and right direction, and the operation of the driver in the front and rear direction The operation of the arm 12 is instructed. The operation control lever 25B is provided on the right side of the driver's seat 22, and the operation lever 25B instructs the operation of the bucket 13 by the operation of the driver in the lateral direction, and the operation of the boom 11 is performed by the operation of the driver in the longitudinal direction. Instruct the operation.

On the left side of the driver's seat 22, a lock lever 26 and a lock switch 27 (see FIG. 4 described later) are provided. The lock lever 26 is selectively operated by the driver between the lock position and the lock release position. The lock lever 26 of the present embodiment is a gate lock lever provided at the entrance of the cab 18, and allows the driver to get on and off when operated to the lock position (raised position). It prevents the driver from getting on and off when it is operated to the (descent position). The lock switch 27 detects the operating position of the lock lever 26.

A start switch 28 is provided on the right side of the driver's seat 22 and on the rear side of the operation control lever 25B. The start switch 28 is constituted by, for example, a push switch, and instructs the start or stop of the engine 20 by the operation of the driver and instructs the energization or de-energization of the electric device. A display device (monitor) 29 is provided on the right side of the driver's seat 22 and in front of the operation control lever 25B.

The lower traveling body 1, the upper revolving superstructure 2, the swing post 10, the boom 11, the arm 12, and the bucket 13 described above constitute a driven body driven by a drive device mounted on a hydraulic shovel. FIG. 3 is a diagram showing a configuration related to the traveling motor 8 and the swing motor 3 on the left side as a representative of the configurations of the driving device of the hydraulic shovel in the present embodiment. The other hydraulic actuators other than the traveling motor 8 and the swing motor 3 on the left side are also driven by the pressure oil discharged from the hydraulic pump, and the configuration related to them is substantially the same.

The drive system of the present embodiment includes a hydraulic pump 30 and a pilot pump 31 driven by an engine 20 (motor), a travel control valve 32 for controlling the flow of pressure oil from the hydraulic pump 30 to the travel motor 8, and hydraulic pressure The control valve 33 for turning which controls the flow of the hydraulic fluid from the pump 30 to the turning motor 3, and the

operation devices

34 and 35 which switch

control valves

32 and 33, respectively are provided.

The travel control device 34 includes the control lever pedal 23A described above, a first pressure reducing valve (not shown) that operates in response to the front operation of the control lever pedal 23A, and the rear operation of the control lever pedal 23A. And a second pressure reducing valve (not shown) that operates in response to The first pressure reducing valve generates a pilot pressure corresponding to the front stroke of the control lever and pedal 23A, using the discharge pressure of the pilot pump 31 as an original pressure, and the generated pilot pressure is the right side of the traveling control valve 32 in FIG. Output to the pressure receiver of Thereby, the traveling control valve 32 is switched to the switching position on the right side in FIG. 3 to rotate the traveling motor 8 in one direction.

The second pressure reducing valve generates a pilot pressure corresponding to the rear stroke of the control lever and pedal 23A using the discharge pressure of the pilot pump 31 as an original pressure, and generates the generated pilot pressure in FIG. 3 of the travel control valve 32. Output to the left pressure receiver. As a result, the travel control valve 32 is switched to the left switching position in FIG. 3 to rotate the travel motor 8 in the opposite direction.

The work operating device 35 operates according to the operation lever 25A described above, a third pressure reducing valve (not shown) that operates according to the left operation of the operation lever 25A, and a fourth according to the right operation of the operation lever 25A. And a pressure reducing valve (not shown). The third pressure reducing valve uses the discharge pressure of the pilot pump 31 as a source pressure to generate a pilot pressure corresponding to the left stroke of the control lever 25A, and the generated pilot pressure is received by the pressure on the right side of the turning control valve 33 in FIG. Output to the unit via the pilot line 36A. Thus, the turning control valve 33 is switched to the switching position on the right side in FIG. 3 to rotate the turning motor 3 in one direction. As a result, the upper swing body 2 is turned to the left.

The fourth pressure reducing valve generates the pilot pressure corresponding to the right stroke of the control lever 25A, using the discharge pressure of the pilot pump 31 as the source pressure, and the generated pilot pressure is received on the left side of the turning control valve 33 in FIG. Output to the unit via the pilot line 36B. As a result, the turning control valve 33 is switched to the left switching position in FIG. 3, and the turning motor 3 is rotated in the opposite direction. As a result, the upper swing body 2 is turned to the right.

The discharge line 37 of the pilot pump 31 is provided with a pilot relief valve 38 and a pilot switching valve 39. The pilot relief valve 38 holds the discharge pressure of the pilot pump 31 constant. The pilot switching valve 39 (electromagnetic valve) is switched between the lower supply position in FIG. 2 and the upper cut position in FIG. 2 by the control of a vehicle controller 40 described later.

When the pilot switching valve 39 is in the supply position, the operating

device

34, 35 and other operating devices (not shown) can generate pilot pressure, so that the swing motor 3, the left traveling motor 8, the right traveling motor, The driving of the swing cylinder, the boom cylinder 14, the arm cylinder 15, and the bucket cylinder 16 is permitted. On the other hand, when the pilot switching valve 39 is in the shutoff position, the operating

devices

34, 35 and other operating devices can not generate pilot pressure, so the swing motor 3, left traveling motor 8, right traveling motor, swing The driving of the cylinder, the boom cylinder 14, the arm cylinder 15, and the bucket cylinder 16 is prohibited.

Next, the electric circuit of the hydraulic shovel of the present embodiment will be described. FIG. 4 is a diagram showing the configuration of the electric circuit of the hydraulic shovel in the present embodiment.

The electric circuit according to the present embodiment includes a vehicle controller 40, an engine control unit (hereinafter referred to as an ECU) 41 for controlling the engine 20, and a portable key (authentication key) 42 provided in the cab 18 and possessed by the driver. And a battery 44. The alternator 45 is driven by the engine 20 to generate power and charge the battery 44.

The body controller 40, the ECU 41, and the authentication controller 46 of the wireless authentication device 43 store an arithmetic control unit (for example, a CPU) that executes arithmetic processing and control processing based on a program, and stores the program and the result of the arithmetic processing. It has a storage unit (for example, ROM, RAM) and the like. The vehicle controller 40, the ECU 41, and the authentication controller 46 of the wireless authentication device 43 are communicably connected to each other through the communication line 47 together with the display device 29 described above.

The vehicle controller 40 transmits an instruction of the engine rotational speed to the ECU 41 via the communication line 47. The ECU 41 controls the fuel injection amount of the engine 20 based on the command of the engine speed to control the engine speed. The display device 29 determines whether the engine 20 is in operation based on a signal from the L terminal of the alternator 45, and transmits the determination result to the vehicle controller 40 via the communication line 47.

The authentication controller 46 of the wireless authentication device 43 transmits a request signal at a predetermined cycle via the LF transmission antenna 48. The portable key 42 transmits an ID code to the wireless authentication device 43 in response to a request signal from the wireless authentication device 43. Although not shown, the portable key 42 is a receiver for receiving a request signal, a transmitter for transmitting an ID code, a microcomputer for controlling the receiver and the transmitter, a receiver, a transmitter, and It has a battery for supplying power to a microcomputer and a transponder in which an ID code is set.

When the authentication controller 46 of the wireless authentication device 43 receives a valid ID code from the portable key 42 via the RF receiving antenna 49, it determines that the ID code is correct and does not receive a valid ID code. The determination result is transmitted to the vehicle controller 40 via the communication line 47.

As shown in FIG. 5, the transmission range (LF band) of the LF transmission antenna 48 is smaller than the reception range (RF band) of the RF reception antenna 49. The transmission range of the LF transmission antenna 48 is, for example, about 1 m in diameter, and the reception range of the RF reception antenna 49 is, for example, about 10 m in diameter. The wireless authentication device 43 includes not only the LF transmitting antenna 48 and the RF receiving antenna 49 but also an antenna (not shown) for the transponder. That is, even when the battery of the portable key 42 is exhausted, if the portable key 42 approaches the transponder antenna, the authentication controller 46 can receive the ID code via the transponder antenna.

As a first function, the vehicle body controller 40 performs control of switching the pilot switching valve 39 based on a detection signal from the lock switch 27 (in other words, the operation position of the lock lever 26). In addition, as a second function, based on an instruction signal from the start switch 28 or the like, it is switched to any of “engine stop / non-energized state”, “engine stop / energized state”, and “engine drive / energized state” Take control. In other words, control for starting or stopping the engine 20 and control for energizing or de-energizing the electric device are performed. Further, as the third function, which is the most significant feature of the present embodiment, during the operation of the engine 20, control is performed to change the rotational speed of the engine 20 based on the authentication result from the wireless authentication device 43. The details will be described below.

(1) Switching of Pilot Switching Valve The solenoid section of the pilot switching valve 39 is connected to the battery 44 via the normally open contact of the pilot cut relay 50. The lock switch 27 is opened when the lock lever 26 described above is in the lock position. The lock switch 27 is closed when the lock lever 26 is in the lock release position, and outputs a detection signal (ON signal) to the vehicle controller 40.

When the vehicle controller 40 receives a detection signal from the lock switch 27 (in other words, when the lock lever 26 is in the unlocking position), the coil of the pilot cut relay 50 is energized to close its contacts. Do. As a result, the pilot switching valve 39 is switched to the supply position, and driving of all the hydraulic actuators is permitted. On the other hand, when the detection signal from the lock switch 27 is not input (in other words, when the lock lever 26 is in the lock position), the coil of the pilot cut relay 50 is not energized and the contact is opened. As a result, the pilot switching valve 39 is held at the shutoff position, and the driving of all the hydraulic actuators is prohibited.

(2) Start or stop of the engine, energization or non-energization of electric equipment One end of the starter motor 51 is constantly connected to the battery 44. The other end side of the starter motor 51 is connected to the battery 44 via a normally open contact of the starter relay 52. The first ST input terminal of the ECU 41 is connected to one end side of the coil of the starter relay 52 and is connected to the battery 44 via the contact of the C relay 53. The second ST input terminal of the ECU 41 is connected to the other end of the coil of the starter relay 52.

The vehicle controller 40 applies an electric signal to the first ST input terminal of the ECU 41 by energizing the coil of the C relay 53 to close the contact. The ECU 41 energizes the coil of the starter relay 52 according to the electric signal to close the contact. As a result, the starter motor 51 is driven to start the engine 20.

The IGN input terminal of the ECU 41 is connected to the battery 44 via the normally open contact of the ACC relay 54. The first VB terminal of the ECU 41 is connected to the battery 44 via the normally open contact of the main relay 55. The second VB terminal of the ECU 41 is connected to the battery 44 via the coil of the main relay 55. The vehicle controller 40 and the authentication controller 46 are always connected to the battery 44.

The first electric component 56 (in detail, for example, a part of the display device 29 and an air conditioner, etc.) is connected to the battery 44 through the normally open contact of the ACC relay 54. The second electric component 57 (in detail, for example, a part of the display device 29, a horn, a light, etc.) is always connected to the battery 44.

The vehicle controller 40 energizes the coil of the ACC relay 54 to close the contact thereof, thereby energizing the first electric component 56 and inputting an electrical signal to the IGN input terminal of the ECU 41. The ECU 41 energizes the coil of the main relay 55 according to the electric signal to close the contact. Thus, the ECU 41 is connected to the battery 44 via the main relay 55.

The vehicle body controller 40 controls the C relay 53 and the ACC relay 54 described above based on an instruction signal from the start switch 28 and the like to “engine stop / non-energized state”, “engine stop / energized state”, And switch to either "engine drive / energized state".

The “engine stopped / non-energized state” means the stopped state of the engine 20 and the non-energized state of the ECU 41 and the first electric component 56, and the vehicle controller 40 controls the contacts of the C relay 53 and the contacts of the ACC relay 54. Open. The “engine stopped / energized state” means the stopped state of the engine 20 and the energized state of the ECU 41 and the first electric component 56, the vehicle controller 40 opens the contact of the C relay 53, and the ACC relay 54 Close the contact. “Engine drive / energized state” means the drive state of the engine 20 and the energized state of the first electric component 56 and the ECU 41, and the vehicle controller 40 temporarily activates the contacts of the C relay 53 to start the engine 20. The contact point of the ACC relay 54 is closed.

The vehicle body controller 40 determines whether authentication of the wireless authentication device 43 has been obtained when an instruction signal from the start switch 28 is input in the case of the “engine stop / non-energized state”, and the lock switch It is determined whether the detection signal from 27 is input (in other words, whether the lock lever 26 is in the lock position and prohibits the operation of all the hydraulic actuators). Then, the authentication of the wireless authentication device 43 is obtained, and the detection signal from the lock switch 27 is not input (in other words, the lock lever 26 is in the lock position and the operation of all the hydraulic actuators is prohibited). Switching to the "engine drive / energized state".

(3) Change of Engine Rotational Speed The vehicle body controller 40 performs control of changing the rotational speed of the engine 20 based on the authentication result from the wireless authentication device 43 in the “engine drive / energized state”. The details will be described with reference to FIG. FIG. 6 is a flowchart showing the processing procedure of the vehicle body controller in the present embodiment.

The vehicle body controller 40 sets a normal set rotation speed (specifically, for example, a rotation set variably by a dial or the like within a range of 2300 rpm to 1200 rpm, for example, as a command value of the engine rotation speed to the ECU 41 at the initial driving of the engine 20). The number or the fixed rotation number is transmitted (step S101).

Then, while the engine 20 is being driven, it is determined whether or not the authentication of the wireless authentication device 43 is obtained (in other words, whether the authentication result is a correct authentication) at a predetermined cycle (step S102). For example, when the authentication of the wireless authentication device 43 is obtained, the vehicle controller 40 transmits the set rotation number as a command value of the engine rotation number to the ECU 41 (step S101). In step S101 (or step S103 described later), if there is no change in the engine rotational speed, it is not necessary to transmit the engine rotational speed command.

On the other hand, for example, when the authentication of the wireless authentication device 43 can not be obtained, the vehicle body controller 40 is preset as a command value of the engine rotational speed to the ECU 41 so as to be lower than the set rotational speed of those that can drive the hydraulic actuator. The low speed rotation number (in detail, for example, 1000 rpm) is transmitted (step S103). Thereby, the rotation speed of the engine 20 is reduced to the low speed rotation speed via the ECU 41.

At the same time, the vehicle controller 40 indicates to the display 29 via the communication line 47 that the engine speed is reduced to the low speed, the reason and the engine speed to be restored to the set speed. Send a command to display the return method of. In response to this command, the display device 29 is, for example, “The engine speed is under control because the portable key can not be detected. To release it, return the portable key to within the detection range. Display a message such as "Please perform Immobilization authentication". "Immobilization" means bringing the portable key 42 close to the transponder antenna.

Thereafter, when the authentication of the wireless authentication device 43 is obtained, the vehicle body controller 40 transmits the set rotational speed as a command value of the engine rotational speed to the ECU 41 (step S101). Thereby, the rotation speed of the engine 20 is returned to the set rotation speed via the ECU 41.

As described above, in the present embodiment, when the authentication of the wireless authentication device 43 can not be obtained while the engine 20 is driven, the number of rotations of the engine 20 is reduced to the low number of rotations. Thereby, for example, when the battery of the portable key 42 carried by the driver is exhausted, or at a place where the driver is away from the hydraulic shovel (in other words, outside the communication range of the wireless authentication device 43) Even if you lose it, you can move the hydraulic shovel. On the other hand, when the driver who holds the portable key 42 leaves the hydraulic shovel, even if another person who is not ready to operate the hydraulic shovel moves the hydraulic shovel, the degree of risk can be suppressed. In addition, even when the driver carrying the portable key 42 temporarily gets off the hydraulic shovel and works around the hydraulic shovel that is out of the communication range of the wireless authentication device 43, even if another person moves the hydraulic shovel The risk of contact, etc. can be reduced.

In the first embodiment, the case where the display device 29 has the function of notifying that the number of revolutions of the engine 20 has been reduced to the low number of revolutions has been described by way of example. Therefore, modifications are possible without departing from the spirit and technical concept of the present invention. That is, a notification device (in detail, for example, a lamp, a buzzer, or the like) other than the display device 29 may have a function to notify that the number of rotations of the engine 20 has been reduced to the low speed. Also in such a case, the same effect as described above can be obtained.

Also, in the first embodiment, the vehicle body controller 40 has been described by way of an example where the rotational speed of the engine 20 is reduced to the low speed rotational speed unless authentication of the wireless authentication device 43 is obtained. The present invention is not limited to this, and modifications can be made without departing from the spirit and technical concept of the present invention. A first modification will be described with reference to FIG. FIG. 7 is a flowchart showing the processing procedure of the vehicle body controller in the present modification. In FIG. 7, the same parts as those in FIG. 6 described above carry the same reference numerals, and the description thereof will be omitted as appropriate.

In this modification, the vehicle body controller 40 does not obtain the authentication of the wireless authentication device 43 (in other words, the state in which the number of revolutions of the engine 20 is reduced to the low number of revolutions) 5) It is determined whether the process has been continued (step S104).

If the duration time is less than the predetermined time, the vehicle controller 40 continues the state in which the number of rotations of the engine 20 is reduced to the low number of rotations (step S103). At this time, the display device 29 displays the fact that the number of revolutions of the engine has been reduced to the low number of revolutions, the reason therefor, and a return method for restoring the number of revolutions of the engine to the set number of revolutions. Therefore, for example, if the battery of the portable key 42 held by the driver in the driver's cab 18 is exhausted, the driver can notice the display on the display device 29 and can cope with it. If the duration is less than the predetermined time and authentication of the wireless authentication device 43 is obtained, the vehicle controller 40 transmits the set rotation speed as a command value of the engine rotation speed to the ECU 41 (step S101). Thereby, the rotation speed of the engine 20 is returned to the set rotation speed via the ECU 41.

On the other hand, when the continuation time reaches the predetermined time, the vehicle controller 40 transmits an instruction to stop the engine to the ECU 41 (step S105). As a result, the engine 20 is stopped via the ECU 41. Therefore, another person who is not ready to operate the hydraulic shovel can not move the hydraulic shovel, and the risk can be suppressed.

The second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description will be omitted as appropriate.

FIG. 8 is a diagram showing a configuration of a drive device of a hydraulic shovel in the present embodiment. FIG. 9 is a diagram showing the configuration of the electric circuit of the hydraulic shovel in the present embodiment.

In the present embodiment, as shown in FIG. 8, in the

pilot lines

36A, 36B connected between the operation controller 35 and the turning control valve 33, turning

lock valves

58A, 58B (turning lock devices) are respectively provided. It is provided. The

swing lock valves

58A and 58B are switched between the lower communication position in FIG. 8 and the upper blocking position in FIG. 8 under the control of the vehicle controller 40A.

More specifically, as shown in FIG. 9, the solenoid portions of the

swing lock valves

58A and 58B are connected to the battery 44 through the normally open contacts of the swing cut relay 59. The vehicle body controller 40A holds the

swing lock valves

58A and 58B in the communication position by opening the contacts without energizing the coil of the swing cut relay 59. As a result, since the pilot pressure can be output from the operation operation device 35 to the turning control valve 33, the driving of the turning motor 3 is permitted.

Further, the vehicle body controller 40A switches the turning

lock valves

58A and 58B to the blocking position by energizing the coil of the turning cut relay 59 to close the contact. As a result, since the pilot pressure can not be output from the operation operation device 35 to the turning control valve 33, the driving of the turning motor 3 is prohibited. At this time, if the pilot switching valve 39 is at the lower supply position in FIG. 8, other hydraulic actuators other than the swing motor 3 (specifically, the left traveling motor 8, the right traveling motor, swing cylinder, boom cylinder 14 and arm cylinder 15 and bucket cylinder 16) are permitted.

FIG. 10 is a flowchart showing the processing procedure of the vehicle body controller in the present embodiment.

The vehicle body controller 40A transmits a normal set rotation speed as a command value of the engine rotation speed to the ECU 41 at the initial stage of driving the engine 20 (step S101). Further, the coil of the swing cut relay 59 is not energized and the contact point is opened to hold the

swing lock valves

58A and 58B in the communication position (step S106). Thereby, the driving of the swing motor 3 is permitted.

Then, while driving the engine 20, it is determined at a predetermined cycle whether authentication of the wireless authentication device 43 is obtained (step S102). For example, when the authentication of the wireless authentication device 43 is obtained, the vehicle controller 40A transmits the set rotation speed as a command value of the engine rotation speed to the ECU 41 (step S101). Further, the coil of the swing cut relay 59 is not energized and the contact point is opened to hold the

swing lock valves

On the other hand, when the authentication of the wireless authentication device 43 can not be obtained, for example, the vehicle body controller 40A transmits the low speed rotation number as the command value of the engine rotation speed to the ECU 41 (step S103). Thereby, the rotation speed of the engine 20 is reduced to the low speed rotation speed via the ECU 41. Further, the coil of the swing cut relay 59 is energized to close the contact point, thereby switching the

swing lock valves

58A and 58B to the shut off position (step S107). Thereby, the driving of the swing motor 3 is prohibited.

At the same time, to the display 29 via the communication line 47, the vehicle controller 40A reduces the engine speed to a low speed and prohibits the drive of the swing motor, the reason, and the engine rotation. A number is returned to the set number of revolutions, and a command to display the method of return for permitting driving of the swing motor is transmitted. The display device 29 displays the corresponding message in response to this command.

Thereafter, when the authentication of the wireless authentication device 43 is obtained, the vehicle body controller 40A transmits the set rotation speed as a command value of the engine rotation speed to the ECU 41 (step S101). Thereby, the rotation speed of the engine 20 is returned to the set rotation speed via the ECU 41. Further, the coil of the swing cut relay 59 is not energized and the contact point is opened to hold the

swing lock valves

58A and 58B in the communication position (step S106). Thereby, the drive of the swing motor 3 is permitted (in other words, the inhibition of the drive of the swing motor 3 is released).

Also in this embodiment configured as described above, as in the first embodiment, the hydraulic shovel can be moved when authentication of the wireless authentication device 43 can not be obtained while the engine 20 is being driven, It is possible to suppress the degree of danger when another person who is not involved in the operation of the hydraulic shovel moves the hydraulic shovel.

Further, in the present embodiment, when the authentication of the wireless authentication device 43 can not be obtained while the engine 20 is being driven, not only the rotational speed of the engine 20 is reduced to a low speed, but also the driving of the swing motor 3 is prohibited. As a result, it is possible to further reduce the degree of danger when another person who is not ready to operate the hydraulic shovel moves the hydraulic shovel.

In the second embodiment, it is assumed that the display device 29 has a function of reducing the number of rotations of the engine 20 to a low number of rotations to notify that the driving of the swing motor 3 is prohibited. Although described by way of example, the present invention is not limited to this, and modifications can be made without departing from the spirit and technical concept of the present invention. That is, the function of notifying that the driving of the swing motor 3 is prohibited by reducing the number of rotations of the engine 20 to a low speed number of rotation is a notification device other than the display device 29 (in detail, for example, a lamp or a buzzer Etc) may have. Also in such a case, the same effect as described above can be obtained.

In the second embodiment, the vehicle body controller 40A reduces the rotational speed of the engine 20 to a low rotational speed and controls the

swing lock valves

58A and 58B to the blocking position unless authentication of the wireless authentication device 43 is obtained. Although the case where the user continues the operation is described as an example, the present invention is not limited to this, and modifications are possible without departing from the spirit and technical concept of the present invention. A second modified example of the present invention will be described using FIG. FIG. 11 is a flowchart showing the processing procedure of the vehicle body controller in the present modification. In FIG. 11, parts equivalent to those in FIG. 10 described above carry the same reference numerals, and the description thereof will be omitted as appropriate.

In the present modification, the vehicle controller 40A does not obtain the authentication of the wireless authentication device 43 (in other words, reduces the number of rotations of the engine 20 to a low number of rotations and controls the

swing lock valves

58A and 58B to the blocking position). It is determined whether or not the above state has continued for a predetermined time (for example, 5 minutes) set in advance (step S104).

If the duration time is less than the predetermined time, the vehicle controller 40A reduces the rotational speed of the engine 20 to the low rotational speed and continues the control of the

swing lock valves

58A and 58B in the shutoff position (steps S103 and S107). . At this time, the display device 29 reduces the engine rotational speed to a low speed rotational speed and prohibits driving of the swing motor, the reason thereof, and the engine rotational speed to return to the set rotational speed. Display the return method for permitting driving. Therefore, for example, if the battery of the portable key 42 held by the driver in the driver's cab 18 is exhausted, the driver can notice the display on the display device 29 and can cope with it. If the duration time is less than the predetermined time and authentication of the wireless authentication device 43 is obtained, the vehicle controller 40A transmits the set rotation speed as a command value of the engine rotation speed to the ECU 41 (step S101). Thereby, the rotation speed of the engine 20 is returned to the set rotation speed via the ECU 41.

On the other hand, when the continuation time reaches the predetermined time, the vehicle controller 40A transmits an instruction to stop the engine to the ECU 41 (step S105). As a result, the engine 20 is stopped via the ECU 41. Therefore, another person who is not ready to operate the hydraulic shovel can not move the hydraulic shovel, and the risk can be suppressed.

In the second embodiment, the case where the

swing lock valves

58A and 58B are respectively provided in the

pilot lines

36A and 36B connected between the operation operation device 35 and the swing control valve 33 has been described as an example. However, the present invention is not limited to this, and modifications can be made without departing from the spirit and technical concept of the present invention. That is, for example, a swing lock valve may be provided in an oil path connected between the swing control valve 33 and the swing motor 3 or the hydraulic pump 30. Also in such a case, the same effect as described above can be obtained.

Further, in the second embodiment, the configuration in which the operating device 35 or the like generates the pilot pressure according to the stroke of the operating member and outputs it to the control valve has been described as an example, but the present invention is not limited thereto. Modifications are possible without departing from the spirit and technical concept of the invention. That is, the operating device detects the stroke of the operating member and outputs it to the vehicle controller, and the vehicle controller generates a control signal according to the stroke of the operating member and outputs it to the electromagnetic proportional pressure reducing valve, and the electromagnetic proportional pressure reducing valve The pilot pressure may be generated and output to the control valve according to the above. Then, instead of the

swing lock valves

58A and 58B, the vehicle controller may switch between enabling and disabling the drive of the swing motor by performing processing for enabling or disabling the control signal for swing. Also in such a case, the same effect as described above can be obtained.

In the second embodiment, when the authentication of the wireless authentication device 43 can not be obtained while the engine 20 is being driven, the vehicle body controller 40A reduces the rotational speed of the engine 20 to a low speed rotational speed, and Although the case where control is performed so as to prohibit driving only 3 has been described as an example, the present invention is not limited to this, and modifications can be made without departing from the spirit and technical concept of the present invention. That is, the vehicle body controller may control not only the swing motor 3 but also the operation of other hydraulic actuators other than the traveling motor, for example. Also in such a case, the same effect as described above can be obtained.

In addition, although the case where this invention was applied to the hydraulic shovel provided with the lower traveling body 1, the upper revolving superstructure 2, and the turning motor 3 was demonstrated to the example above, it is not restricted to this. That is, for example, the present invention (in detail, for example, the first embodiment or the like) with respect to the lower traveling body, the upper swing body, and another construction machine (in detail, for example, a wheel loader etc.) The first modification may be applied.

DESCRIPTION OF SYMBOLS 1 lower traveling body 2 upper revolving unit 3 revolving motor 8 traveling motor 14 boom cylinder 15 arm cylinder 16 bucket cylinder 20 engine 28 start switch 29 display device 30

hydraulic pump

40, 40A vehicle controller 42 portable key 43

wireless authentication device

58A, 58B revolving Lock valve (swing lock device)

Claims

An engine, a hydraulic pump driven by the engine, a plurality of hydraulic actuators driven by pressure oil discharged from the hydraulic pump, a start switch instructing the start of the engine by the operation of the driver, the driver A construction machine comprising: a wireless authentication device that performs wireless authentication with a portable key possessed by the mobile phone; and a controller that starts the engine based on an instruction of the activation switch and authentication of the wireless authentication device.
The construction machine, wherein the controller reduces the number of revolutions of the engine to a preset low speed when the authentication of the wireless authentication device can not be obtained while the engine is being driven.
In the construction machine according to claim 1,
The construction machine according to claim 1, wherein the controller stops the engine when a state in which the number of revolutions of the engine is reduced to the low speed continues for a predetermined time.
In the construction machine according to claim 2,
The controller restores the number of revolutions of the engine to the set number of revolutions when authentication of the wireless authentication device is obtained within the predetermined time with the number of revolutions of the engine reduced to the low number of revolutions. Construction machinery characterized by
In the construction machine according to claim 3,
Furthermore, it has a display device.
The controller displays on the display device that the number of revolutions of the engine has been reduced to the low number of revolutions, the reason therefor, and a method of restoring the number of revolutions of the engine to the set number of revolutions. Construction machines characterized by
In the construction machine according to claim 1,
A lower traveling body, an upper revolving body pivotably provided on the upper side of the lower traveling body, a revolving motor included in the plurality of hydraulic actuators for revolving the upper revolving body, permission for driving the revolving motor And a swivel lock device to switch between prohibition and
The controller reduces the number of revolutions of the engine to the low speed and prohibits the driving of the swing motor when authentication of the wireless authentication device can not be obtained while the engine is being driven. A construction machine that controls the swing lock device.
In the construction machine according to claim 5,
The controller reduces the rotational speed of the engine to the low speed rotational speed, and controls the swing lock device so as to inhibit the drive of the swing motor when the state continues for a predetermined time set in advance. Construction equipment characterized by stopping.
In the construction machine according to claim 6,
The controller reduces the rotational speed of the engine to the low speed rotational speed, and controls the swing lock device to prohibit driving of the swing motor. Authentication of the wireless authentication device is performed within the predetermined time. Is obtained, the rotation speed of the engine is returned to the set rotation speed, and the swing lock device is controlled to release the inhibition of the drive of the swing motor.
In the construction machine according to claim 7,
Furthermore, it has a display device.
The controller indicates that the rotation speed of the engine is reduced to the low speed rotation speed to prohibit the driving of the swing motor, the reason thereof, and the rotation speed of the engine are returned to the set rotation speed to perform the rotation A construction machine characterized by displaying a return method for permitting driving of a motor on the display device.