JP2018016985A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction machine capable of detecting an abnormality of an electric operation lever device to control a front work device before starting an engine, in addition to realizing the reduction of cost for authentication means and the simplification of authentication operation.SOLUTION: A controller 5 generates control pattern strings including at least one control pattern based on neutral holding operation, in which operation levers 4a and 4b are held in a neutral position, and on full lever operation, in which the operation levers are turned to the maximum to any one of forward, backward, right and left directions, which were executed between the start of the controller and the start of an engine 33. When the control pattern strings match predetermined control patterns previously registered in a memory 5c, a relay 9 switching connection and interruption between a key switch 2 and a starter motor 8 becomes a connection state, which enables the engine to be started.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a construction machine including an electric operation lever device for operating a front working device.

  Some conventional construction machines are configured to prohibit the operation of an actuator by a person other than a regular operator for the purpose of preventing theft. For example, Patent Documents 1 and 2 disclose such construction machines.

  Patent Document 1 states that “the solenoid valve 23 of the anti-theft device 20 is installed in the pilot primary pressure pipe 3 between the pilot hydraulic pump 1 and the pilot valve device 4. The numeric keypad 21a of the key input device 21 is in the order of the code number. If not pressed, the unlocking electronic circuit 22K does not generate an unlocking signal, and the solenoid valve 23 shuts off the pilot primary pressure pipe 3. Therefore, the pilot primary pressure from the pilot hydraulic pump 1 is shut off, Even if the manual lever 4c of the pilot valve device 4 is operated, no pilot secondary pressure is generated, the main control valve 6 is not moved, the hydraulic cylinder 8 is not moved, and the hydraulic machine cannot be moved. " (See summary).

  On the other hand, Patent Document 2 states that “a controller 11 has a vehicle starter switch 12, a fuel injection engine 14 that can be started by an engine key 13 inserted into the starter switch 12, and a dial that can select a plurality of accelerator positions. The accelerator 11 is connected to the monitor 16 that can display the accelerator position selected by the dial accelerator 15 as a digital value, and the one-touch low idle switch 17 that determines the digital value displayed on the monitor 16. The controller 11 The fuel injection control circuit 18 is unlocked with the combination of a plurality of digital numerical values selected by the dial accelerator 15 and displayed on the monitor 16 and determined by the one-touch low idle switch 17 as a personal identification number. It has an unlocking circuit 19 ”(see abstract).

JP-A-9-50584 JP 2006-27459 A

  The anti-theft device for a hydraulic machine described in Patent Document 1 requires a key input device as an input device for authentication in addition to a normal operation device, which causes a problem of increasing costs.

  In the vehicle antitheft device described in Patent Document 2, a digital numerical value is displayed on a monitor by an operation switch capable of selecting a plurality of accelerator positions by digital numerical values, and the digital numerical values are determined by other switch operations. Since it is necessary to input a personal identification number by repeating selection, display, and determination of a numerical value a plurality of times, there is a problem that the authentication operation becomes complicated.

  On the other hand, in a hydraulic excavator in which the hydraulic operating lever device for operating the front working device is replaced with an electric operating lever device, if the engine is started with the electric operating lever device broken, the operating amount of the operating lever is reduced. Since the corresponding electric signal is not output from the electric operation lever device, the front working device may operate against the intention of the operator.

  The present invention has been made in view of the above problems, and an object of the present invention is to reduce the cost of the authentication means and simplify the authentication operation and to provide an electric operation lever device for operating the front work device. An object of the present invention is to provide a construction machine capable of detecting an abnormality before starting an engine.

  In order to solve the above problems, the present invention provides a lower traveling body, an upper revolving body provided on the upper portion of the lower traveling body so as to be capable of swiveling in the left-right direction, and a front traveling portion of the upper revolving body. A movable front work device, an engine, a hydraulic pump driven by the engine, a hydraulic actuator supplied with pressure oil from the hydraulic pump to drive the front work device, and a neutral when not operated An electric operation lever device that has an operation lever that can be operated in a plurality of operation directions from a position and outputs an electric signal according to the operation direction and operation amount of the operation lever, and is output from the electric operation lever device In a construction machine comprising a control device that converts an electrical signal into an operation signal for the hydraulic actuator, the control device is activated until the engine is started. An operation pattern sequence including at least one operation pattern based on a neutral holding operation for holding the executed operation lever in the neutral position and a full lever operation for operating the operation lever in any one of the plurality of operation directions to the maximum. And when the operation pattern sequence matches a predetermined operation pattern sequence registered in advance, the engine can be started.

  According to the present invention, the cost of the authentication unit can be reduced by using the operation lever of the existing electric operation lever device for the authentication operation. Further, by generating the operation pattern sequence based on the neutral holding operation and the full lever operation of the operation lever, the authentication operation can be simplified. Furthermore, the operation position of the operation lever is determined based on the electric signal output from the electric operation lever device during the neutral holding operation of the operation lever and during the full lever operation. When the electric operating lever device is not outputting a signal, the authentication is not permitted and the engine cannot be started. Therefore, the abnormality of the electric operating lever device can be detected before starting the engine.

It is a figure showing the schematic structure of the hydraulic excavator as an example of the construction machine concerning one embodiment of the present invention. It is a figure which shows the structure of the engine starting system mounted in the hydraulic shovel shown in FIG. It is a figure which shows the example of a transition of the authentication screen displayed on a monitor during execution of authentication operation. It is a figure which shows the relationship between the lever operation amount of the front-back (left-right) direction of an operation lever, and the front-back (left-right) voltage output from an electric operation lever apparatus. It is a flowchart which shows the process which determines each operation position of the left and right operation lever performed by the controller in authentication mode. It is a flowchart which shows the authentication process performed by the controller in authentication mode. It is a figure which shows the operation pattern data which memorize | stores each operation position of a left and right operation lever. It is a figure which shows each operation position of the left and right operation lever in the authentication operation shown in FIG. 3 in time series. It is a flowchart which shows the transfer process from the authentication mode performed by the controller in authentication mode to registration mode. It is a flowchart which shows the registration process of the authentication pattern sequence performed by the controller in registration mode.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same part and the overlapping description is abbreviate | omitted suitably.

  FIG. 1 is a diagram showing a schematic configuration of a hydraulic excavator as an example of a construction machine according to the present invention.

  In FIG. 1, a hydraulic excavator 10 is rotated in a vertical direction at a lower traveling body 20, an upper revolving body 30 provided on an upper portion of the lower traveling body 20 so as to be pivotable in the left-right direction, and a front portion of the upper revolving body 30. And a front working device 40 provided in a possible manner.

  The lower traveling body 20 includes left and right crawler frames 21, left and right crawlers 22 mounted on the left and right crawler frames 21, and left and right traveling hydraulic motors 23 that independently drive the left and right crawlers 22, respectively. (All shown on the left only).

  The upper swing body 30 includes a swing frame 31 as a support structure. On the swing frame 31, a hydraulic pump 32 that supplies pressure oil to each hydraulic actuator, an engine 33 that drives the hydraulic pump 32, and a lower traveling body. A turning device 34 for turning the upper turning body 30 with respect to 20 and a turning hydraulic motor (not shown) for driving the turning device 34 are mounted. A cab 35 provided on the front left side of the swivel frame 31 includes left and right electric operation lever devices 3a and 3b (shown in FIG. 2) for operating the front work device 40 and the swivel device 34, and a hydraulic excavator. A monitor 6 (shown in FIG. 2) for displaying various types of information is installed.

  The front working device 40 includes a boom 41 attached to the front portion of the upper swing body 30 so as to be rotatable in the vertical direction, an arm 42 attached to the tip of the boom 41 so as to be rotatable, and a front end of the arm 42. And has a bucket 43 movably attached thereto. The boom 41 performs a boom raising / lowering operation by expanding and contracting the boom cylinder 44. The arm 42 performs an arm pull (arm cloud) / arm push (arm dump) operation by extending and contracting the arm cylinder 45. The bucket 43 performs a bucket excavation (bucket cloud) / bucket discharge (bucket dump) operation by expansion and contraction of the bucket cylinder 46.

  In the ISO standard operation method, the front operation of the left operation lever 4a corresponds to the arm dumping operation, the rear operation corresponds to the arm cloud operation, the left operation corresponds to the left turning operation, and the right operation corresponds to the right turning operation. The front operation of the right operation lever 4b corresponds to the boom lowering operation, the rear operation corresponds to the boom raising operation, the left operation corresponds to the bucket cloud operation, and the right operation corresponds to the bucket dump operation.

  FIG. 2 is a diagram showing a configuration of an engine start system mounted on the hydraulic excavator shown in FIG.

  In FIG. 2, the engine start system 100 displays various information of a key switch 2 into which the engine key 1 is inserted, left and right electric operation lever devices 3a and 3b, a controller 5 for performing various controls, and a hydraulic excavator 10. And a starter motor 8 for starting the engine 33 (shown in FIG. 1), and a relay 9 for switching between connection and disconnection of the key switch 2 and the starter motor 8.

  The key switch 2 outputs an on signal when the engine key 1 is operated to the on position, and outputs a start signal when the engine key 1 is operated to the start position.

  The ON signal output from the key switch 2 is input to the controller 5. When an ON signal is input from the key switch 2, the controller 5 starts in a mode for accepting an operator's authentication operation (hereinafter referred to as “authentication mode”).

  The start signal output from the key switch 2 is input to the starter motor 8 via the relay 9. The relay 9 maintains a non-connected state while the engine start permission signal input from the controller 5 is off, and enters a connected state when the engine start permission signal is turned on. Thus, until the engine start permission signal output from the controller 5 is turned on, the start signal output from the key switch 2 is interrupted by the relay 9 and is not transmitted to the starter motor 8, and therefore the engine 33 cannot be started. Become.

  The left and right electric operation lever devices 3a and 3b have left and right operation levers 4a and 4b that return to the neutral position when not operated, respectively, and the left and right operation levers 4a and 4b are operated in the front-rear direction (tilt angle). And a voltage (hereinafter referred to as “left / right output voltage”) corresponding to the operation amount (tilt angle) in the left-right direction are output. The front and rear (left and right) output voltages output from the left and right electric operation lever devices 3a and 3b are input to the A / D converter 5a of the controller 5 and converted into voltage values.

  The controller 5 operates in the authentication mode from the start until the engine 33 is started, and operates in the normal mode after the engine 33 is started.

  The controller 5 in the authentication mode performs the neutral holding operation for holding the left and right operation levers 4a and 4b performed before starting the engine 33 in the neutral position and the left and right operation levers 4a and 4b in either the front, rear, left or right direction. A sequence of operation patterns (hereinafter referred to as “input pattern sequence”) is generated based on the full lever operation that operates to the maximum extent, and the input pattern sequence is registered in advance in the memory 5c (hereinafter referred to as “authentication pattern”). If it coincides with the "column"), the engine start permission signal is turned on.

  On the other hand, the controller 5 in the normal mode receives the voltage values of the front and rear (left and right) output voltages input from the left and right electric operation lever devices 3a and 3b converted by the A / D converter 5a by the calculator 5b. It converts into the operation speed of an actuator (boom cylinder 44, arm cylinder 45, bucket cylinder 46, and turning hydraulic motor), and outputs an actuator operation signal according to each operation speed. Thereby, the operating speed of each actuator is controlled according to the operation amount of the left and right operation levers 4a and 4b in the front-rear and left-right directions.

  The monitor 6 displays an authentication screen 7 when the controller 5 is in the authentication mode. The lever position display field 7a of the authentication screen 7 displays the operation positions of the left and right operation levers 4a and 4b, and the pattern input number display field 7b has a number corresponding to the number of operation patterns whose input has been confirmed. "Is displayed. Thereby, the operator can perform the authentication operation while confirming the operation pattern performed by the operator. In addition, the operator confirms that the actual operation positions of the left and right operation levers 4a and 4b match the operation positions displayed in the lever position display field 7a, whereby the left and right electric operation lever devices 4a and 4a, It can be confirmed that the front and rear (left and right) output voltages are normally output from 4b. The monitor 6 displays a screen (not shown) for displaying various information of the excavator 10 when the controller 5 is in the normal mode.

  FIG. 3 is a diagram illustrating a transition example of the authentication screen 7 displayed on the monitor 6 during execution of the authentication operation. Hereinafter, each screen will be described.

  The screen M1 shows the state of the authentication screen 7 immediately after the engine key 1 inserted in the key switch 2 is operated to the ON position and the controller 5 is activated in the authentication mode. In the screen M1, the left and right operation levers 4a and 4b are in a neutral position by a black circle on the cross line, and that the operation pattern input number is 0 is indicated by a blank in the pattern input number display field 7b. . As shown in the screen M1, the authentication operation starts when the number of operation pattern inputs is 0 and the left and right operation levers 4a and 4b are in the neutral position.

  In the screen M2, as the first operation pattern (hereinafter referred to as “first pattern”), the combination of the rearward full lever operation of the left operation lever 4a and the non-operation of the right operation lever 4b is being executed. The state of the authentication screen 7 is shown. After execution of the first pattern, as shown in the screen M3, when the left operation lever 4a is returned to the neutral position and the left and right operation levers 4a and 4b are held at the neutral position for a predetermined time, the input of the first pattern is confirmed, and the pattern The first “*” is displayed in the input number display field 7b, and the next operation pattern is awaiting execution.

  In the screen M4, as the second operation pattern (hereinafter referred to as “second pattern”), the combination of the full operation of the left operation lever 4a in the right direction and the non-operation of the right operation lever 4b is being executed. The state of the authentication screen 7 is shown. After execution of the second pattern, as shown in the screen M5, when the left operating lever 4a is returned to the neutral position and held at the neutral position for a predetermined time, the input of the second pattern is confirmed, and two are displayed in the pattern input number display field 7b. The eye “*” is displayed, and the next operation pattern is awaiting execution.

  The screen M6 executes a combination of a right full lever operation of the left operation lever 4a and a left full lever operation of the right operation lever 4b as a third operation pattern (hereinafter referred to as "third pattern"). The state of the authentication screen 7 in the middle is shown. After execution of the third pattern, as shown in the screen M5, when the left and right operation levers 4a and 4b are returned to the neutral position and held at the neutral position for a predetermined time, the input of the third pattern is confirmed, and the pattern input number display field 7b The third “*” is displayed on the screen, and the next operation pattern is awaiting execution.

  On the screen M8, as a special operation pattern (hereinafter referred to as “end pattern”) for notifying the end of input of the operation pattern, a full lever operation (in random order) of the left operation lever 4a and front / rear left / right of the right operation lever 4b. The state of the authentication screen 7 in the middle of executing the combination with the direction full lever operation (in no particular order) is shown. After execution of the end pattern, as shown in the screen M9, when the left and right operation levers 4a and 4b are returned to the neutral position and held at the neutral position for a predetermined time, the authentication operation is completed, and the input pattern comprising the first to third patterns It is determined whether or not the sequence matches the authentication pattern sequence registered in advance in the memory 5c.

  FIG. 4 is a diagram illustrating the relationship between the lever operation amount in the front / rear (left / right) direction of the operation lever 4a (4b) and the front / rear (left / right) output voltage output from the electric operation lever device 3a (3b).

  When the operation lever 4a (4b) is in the neutral position (non-operation position), the front / rear (left / right) output voltage is 2.5V.

  When the operation lever 4a (4b) is operated backward (leftward), the front / rear (left / right) output voltage changes between 2.5V and 0.5V (minimum output voltage), and the operation lever 4a (4b) is moved. When operated in the forward direction (right direction), the front / rear (left / right) output voltage changes from 2.5V to 4.5V (maximum output voltage).

  The controller 5 in the authentication mode determines the operation position of the operation lever 4a (4b) as follows in consideration of the play of the operation lever 4a (4b) and the like.

  When the front / rear (left / right) output voltage is not less than the voltage Vl2 obtained by subtracting the predetermined margin from 2.5V and not more than the voltage Vh2 obtained by adding the predetermined margin to 2.5V, the operation lever 4a (4b) is in the neutral position. Consider it.

  When the front / rear (left / right) output voltage is equal to or less than the voltage Vl1 obtained by adding a predetermined margin to the minimum output voltage (0.5V), the operation lever 4a (4b) is in the rear (leftward) full lever operation position. I reckon.

  When the front / rear (left / right) output voltage is equal to or higher than the voltage Vh1 obtained by subtracting a predetermined margin from the maximum output voltage (4.5V), the operation lever 4a (4b) is in the full lever operation position in the forward direction (right direction). I reckon.

  When the front / rear (left / right) output voltage does not correspond to any of the above, the operation lever 4a (4b) is considered to be in an indefinite position.

  Hereinafter, the full lever operation in the front / rear and left / right directions is referred to as “front full operation”, “rear full operation”, “left full operation”, and “right full operation”, and the operation position of the operation lever 4a (4b) at each operation These are referred to as “front full position”, “rear full position”, “left full position”, and “right full position”, respectively.

  FIG. 5 is a flowchart showing a process of determining the operation position of the operation lever 4a (4b) executed by the controller 5 in the authentication mode (hereinafter referred to as “operation position determination process”). Hereinafter, each step will be described.

  First, it is determined whether or not the operation lever 4a (4b) is in the rear (left) full position (that is, whether the output voltage before and after (left and right) the operation lever 4a (4b) is Vl1 or less) (step) S101).

  If it is determined in step S101 that the front / rear (left / right) output voltage is Vl1 or less (YES), the operation position determination result of the operation lever 4a (4b) is set to the rear (left) full position (step S102), and the operation position is determined. End the process.

  If it is determined in step S101 that the front / rear (left / right) output voltage is greater than NO (NO), whether or not the operation lever 4a (4b) is in the front (right) full position (that is, the operation lever 4a (4b) It is determined whether or not the front and rear (left and right) output voltage is Vh1 or more (step S103).

  If it is determined in step S103 that the front / rear (left / right) output voltage is Vh1 or more (YES), the operation position determination result of the operation lever 4a (4b) is set to the front (right) full position (step S104), and the operation position determination is performed. End the process.

  If it is determined in step S103 that the front / rear (left / right) output voltage is less than Vh1 (NO), whether or not the operation lever 4a (4b) is in the neutral position (that is, the front / rear (left / right) output voltage is Vl2 or more and It is determined whether or not Vh2 or less (step S105).

  When it is determined in step S105 that the front / rear (left / right) output voltage is Vl2 or more and Vh2 or less (YES), the operation position determination result of the operation lever 4a (4b) is set to the neutral position (step S106), and the operation position determination process is performed. Exit.

  If it is determined in step S105 that the front / rear (left / right) output voltage is less than Vl2 or greater than Vh2 (NO), the operation position determination result of the operation lever 4a (4b) is set to an indefinite position (step S107), and the operation position determination process is performed. finish.

  FIG. 6 is a flowchart showing an authentication process executed by the controller 5 in the authentication mode. Hereinafter, each step will be described.

  First, an operation position determination process (shown in FIG. 5) is executed for each of the left and right operation levers 4a and 4b (step S201).

  Following step S201, the determination result of step S201 is stored as operation pattern data (step S202). Specifically, as shown in FIG. 7A, the operation pattern data is composed of 8 bits, the presence or absence of the front full operation of the right operation lever 4b is set to bit 0 (least significant bit), and the right operation lever 4b Presence of left full operation to bit 1, Presence of full operation of right operation lever 4b to bit 2, Presence of right full operation of right operation lever 4b to bit 3, Presence of full operation of left operation lever 4a In bit 4, whether the left operation lever 4a is fully operated to the left in bit 5, whether the left operation lever 4a is fully operated in the bit is in bit 6, and whether the left operation lever 4a is fully operated in the right is bit 7 (maximum Each is stored in the upper bits). In this case, as shown in FIG. 7B, the first pattern (combination of full operation after the left operation lever 4a and non-operation of the right operation lever 4b) is 01000000 in binary notation (0x40 in hexadecimal notation). Thus, the second pattern (the combination of the full right operation of the left operation lever 4a and the non-operation of the right operation lever 4b) is 10000000 (0x80), and the third pattern (the full right operation of the left operation lever 4a and the right operation lever 4b). Of the left full operation) is 10000010 (0x82), and the end pattern (combination of full left / right full operation of the left operation lever 4a and full operation of the right / left / right operation lever 4b) is 11111111 (0xFF). . By digitizing the operation pattern in this way, it is possible to determine whether or not the input pattern sequence matches the authentication pattern sequence.

  Subsequent to step S202, it is determined whether or not the input of the operation pattern is confirmed (that is, whether or not the left and right operation levers 4a and 4b are held at the neutral position for a predetermined time (for example, 1 second)) (step S203).

  If it is determined in step S203 that the input of the operation pattern has been confirmed (YES), whether or not the input of the operation pattern has ended (that is, the operation pattern whose input has been confirmed in step S203 matches the end pattern (0xFF)). Whether or not) (step S204).

  If it is determined in step S204 that the input of the operation pattern has not ended (NO), whether or not the operation pattern whose input has been confirmed in step S203 is valid (that is, the operation pattern is the left and right operation levers 4a and 4b). Whether or not it includes a full lever operation of any one of front, rear, left and right (other than 0x00) is determined (step S205).

  If it is determined in step S205 that the operation pattern is not valid (NO), the process returns to step S201.

  If it is determined in step S205 that the operation pattern is valid (YES), the operation pattern is added to the input pattern sequence (step S206), and one “*” is added to the pattern input number display field 7b ( Step S207) and return to Step S201.

  If it is determined in step S204 that the input of the operation pattern has been completed (YES), it is determined whether or not the input pattern sequence matches the authentication pattern sequence registered in advance in the memory 5c (step S208).

  If it is determined in step S208 that the input pattern string does not match the authentication pattern string (NO), the input pattern string is cleared (step S210) and the pattern input number display field 7b is cleared (step S111). Return to S101. As a result, if the authentication fails, the authentication operation can be restarted from the beginning.

  If it is determined in step S208 that the input pattern string matches the authentication pattern string (YES), the engine start permission signal is turned on (step S209), and the authentication process is terminated. As a result, the relay 9 is connected, and the start signal output from the key switch 2 is transmitted to the starter motor 8, so that the engine 33 can be started.

  FIG. 8 is a diagram showing the operation positions of the left and right operation levers 4a and 4b in the authentication operation shown in FIG. 3 in time series.

  In FIG. 8, a section T0 is in a state of waiting for execution of an operation pattern immediately after the controller 5 starts the authentication process, and the left and right operation levers 4a and 4b are in neutral positions.

  In the section T0 (execution waiting state), when the backward operation of the left operation lever 4a is entered, the state shifts to the state in which the first pattern is being executed (section T1). After the left operating lever 4a is fully operated afterward, when the left operating lever 4a is returned to the neutral position, it shifts to a confirmation waiting state (section T2). When the left and right operation levers 4a and 4b are held at the neutral position for a predetermined time, the input of the second pattern (0x80) is confirmed, and the process shifts to the execution waiting state (section T3) for the next operation pattern. Here, even if the left and right operation levers 4a and 4b are operated in half in either the front, rear, left or right direction during the section T1 (the state in which the first pattern is being executed), it is not reflected in the operation pattern data. In the section T2 (waiting for confirmation), when the left and right operation levers 4a and 4b are operated in either the front, rear, left, or right directions, the waiting for confirmation (section T2) is canceled and the first pattern is being executed. The state (section T1) is considered to be continuing.

  When an operation in the right direction of the left operation lever 4a is entered in the section T3 (waiting for execution), the state shifts to a state in which the second pattern is being executed (section T4). When the left operating lever 4a is fully operated to the right and then returned to the neutral position, it shifts to a confirmation waiting state (section T5). When the left and right operation levers 4a and 4b are held at the neutral position for a predetermined time, the input of the second pattern (0x80) is confirmed, and the process shifts to the execution waiting state (section T6) for the next operation pattern.

  In the section T6 (execution waiting state), when the right operation of the left operation lever 4a is entered, the state shifts to the third pattern execution state (section T7). When the left operating lever 4a is fully operated to the right and the right operating lever 4b is fully operated to the left and then returned to the neutral position, the state shifts to the confirmation waiting state (section T8). When the left and right control levers 4a and 4b are held at the neutral position for a predetermined time, the input of the third pattern (0x82) is confirmed, and the process shifts to the next operation pattern waiting state (section T9). In the section T7, the operation pattern data is the same even if the left and right operation levers 4a and 4b are operated in reverse order.

  In the section T9 (execution waiting state), when the forward operation of the left and right operation levers 4a and 4b is entered, the state shifts to a state in which the fourth pattern is being executed (section T10). After the left and right control levers 4a and 4b are operated in front full operation, left full operation, rear full operation, and right full operation (in no particular order) and then returned to the neutral position, the operation pattern waiting state (section T11) is entered. To do. When the left and right control levers 4a and 4b are held at the neutral position for a predetermined time, the input of the fourth pattern (0xFF) is confirmed, and the authentication operation is ended when the fourth pattern matches the end pattern (0xFF). .

  Next, a procedure for registering (updating) the authentication pattern sequence will be described. The registration (update) of the authentication pattern sequence is performed after a special operation is performed after authentication is permitted and before the engine is started, and the mode is changed from the authentication mode to a mode for registering the authentication pattern sequence (hereinafter referred to as “registration mode”). Do.

  FIG. 9 is a flowchart showing a transition process from the authentication mode to the registration mode (hereinafter referred to as “registration mode transition process”) executed by the controller 5 in the authentication mode. Hereinafter, each step will be described.

  First, it is determined whether or not the engine 33 is stopped (step S301).

  If it is determined in step S301 that the engine 33 is stopped (YES), whether or not the left and right operation levers 4a and 4b are at the predetermined operation positions (in the example shown in FIG. 9, the left operation lever 4a is It is determined whether it is in the right full position and the right operation lever 4b is in the left full position (step S303).

  If it is determined in step S303 that the left and right operation levers 4a and 4b are at the predetermined operation positions (YES), the left and right operation levers 4a and 4b are at the predetermined operation positions for a predetermined time (in the example shown in FIG. 9). It is determined whether or not it is held for 10 seconds (step S304).

  If it is determined in step S304 that the left and right operation levers 4a and 4b are not held at the predetermined operation positions for a predetermined time (NO), the registration mode transition process is terminated without shifting to the registration mode.

  If it is determined in step S304 that the left and right operation levers 4a and 4b are held at the predetermined operation positions for a predetermined time (YES), the process shifts to the registration mode (step S305), and the registration mode transfer process is terminated.

  When it is determined in step S301 that the engine 33 is not stopped (NO), the mode is shifted to the normal mode regardless of which mode is currently in (step S302), and the registration mode shift process is terminated. Thereby, when the engine 33 is started during the authentication pattern registration process, the mode is forcibly returned to the normal mode.

  The registration mode transition process shown in FIG. 9 is merely an example, and various predetermined operation positions in step S303 and predetermined times in step S304 can be selected.

  FIG. 10 is a flowchart showing an authentication pattern string registration process (hereinafter referred to as “authentication pattern string registration process”) executed by the controller 5 in the registration mode. Hereinafter, each step will be described.

  10, steps S401 to S407 are steps for generating an input pattern sequence from the operation positions of the left and right operation levers 4a and 4b, and are the same as steps S201 to S207 of the authentication process shown in FIG. These descriptions are omitted.

  If it is determined in step S404 that the input has been completed (YES), it is determined whether or not the input pattern string is generated for the first time (step S408).

  If it is determined in step S408 that the input pattern string is generated for the first time (YES), the input pattern string is stored as a provisional authentication pattern string (step S409), and the process returns to step S401.

  When it is determined in step S408 that the input pattern sequence is not generated for the first time (NO) (that is, when it is determined that the input pattern sequence is generated for the second time), the input pattern sequence is It is determined whether or not the temporary authentication pattern string matches (step S410).

  If it is determined in step S410 that the input pattern sequence does not match the provisional authentication pattern sequence (NO), the authentication pattern sequence is not registered in the memory 5c, and the normal mode is entered (step S412), and then the authentication pattern sequence registration is performed. End the process.

  If it is determined in step S410 that the input pattern string and the provisional authentication pattern string match (YES), the provisional authentication pattern string is registered as an authentication pattern in the memory 5c (step S411), and after shifting to the normal mode ( Step S412), the authentication pattern sequence registration process is terminated. In this way, the input pattern string that is desired to be registered as the authentication pattern string is generated twice, and by confirming that both match, the input pattern string that is not intended by the operator is prevented from being registered as the authentication pattern string. be able to. Also, the authentication strength can be freely adjusted by increasing or decreasing the number of operation patterns constituting the authentication pattern sequence.

  According to the present embodiment, the cost of the authentication means can be reduced by using the left and right operation levers 4a and 4b of the existing left and right electric operation lever devices 3a and 3b for the authentication operation. Further, by generating an operation pattern sequence based on the neutral holding operation and the full lever operation on the left and right operation levers 4a and 4b, the authentication operation can be simplified. Further, the left and right operation levers 4a and 4b are operated based on the front and rear (left and right) output voltages output from the left and right electric operation lever devices 3a and 3b during the neutral holding operation and the full lever operation of the left and right operation levers 4a and 4b. By determining the position, authentication is permitted when the left and right electric control lever devices 3a and 3b are not outputting the front and rear (left and right) output voltages corresponding to the operation direction and operation amount of the left and right operation levers 4a and 4b. Since the engine 33 cannot be started, an abnormality in the left and right electric operation lever devices 3a and 3b can be detected before the engine is started.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to above-described embodiment, Various modifications are included. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described.

  DESCRIPTION OF SYMBOLS 1 ... Engine key, 2 ... Key switch, 3a, 3b ... Left and right electric operation lever device, 4a ... Left operation lever, 4b ... Right operation lever, 5 ... Controller (control device), 5a ... A / D converter, 5b ... Calculator, 5c ... Memory, 6 ... Monitor (display device), 7 ... Authentication screen, 7a ... Lever position display column, 7b ... Pattern input number display column, 8 ... Starter motor, 9 ... Relay, 10 ... Hydraulic excavator , 20 ... Lower traveling body, 21 ... Crawler frame, 22 ... Crawler, 23 ... Traveling hydraulic motor, 30 ... Upper turning body, 31 ... Turning frame, 32 ... Hydraulic pump, 33 ... Engine, 34 ... Swivel device, 35 ... Operation 40, front working device, 41 ... boom, 42 ... arm, 43 ... bucket, 44 ... boom cylinder, 45 ... arm cylinder, 46 ... bucket cylinder.

Claims (4)

A lower traveling body,
An upper swing body provided on the upper portion of the lower traveling body so as to be pivotable in the left-right direction;
A front working device provided at the front of the upper swing body so as to be rotatable in the vertical direction;
Engine,
A hydraulic pump driven by the engine;
A hydraulic actuator that is supplied with pressure oil from the hydraulic pump and drives the front working device;
An electric operation lever device having an operation lever operable in a plurality of operation directions from a neutral position during non-operation, and outputting an electric signal corresponding to the operation direction and operation amount of the operation lever;
In a construction machine comprising a control device that converts an electric signal output from the electric operation lever device into an operation signal of the hydraulic actuator,
The control device includes a neutral holding operation for holding the operation lever in the neutral position, which is executed from when the engine is started to when the engine is started, and a maximum of the operation lever in any of the plurality of operation directions. An operation pattern sequence including at least one operation pattern is generated based on a full lever operation that is limited, and the engine can be started when the operation pattern sequence matches a predetermined operation pattern sequence registered in advance. A construction machine characterized by being configured as described above. The construction machine according to claim 1,
The controller is
A section from when the engine is started until the engine is started is divided into a first section in which the neutral holding operation does not continue for a predetermined time and a second section in which the neutral holding operation continues for a predetermined time,
In the first section, when the operating lever is operated in full lever in any one of the plurality of operating directions, and the operating lever is not operated in full other in the other operating directions, the first lever An operation pattern consisting of a combination of operation directions in which the operation lever is fully operated in one section is added to the operation pattern row,
The operation lever is configured to determine whether or not the operation pattern sequence matches the predetermined operation pattern sequence when the operation lever is fully operated in all of the plurality of operation directions in the first section. Construction machinery characterized by being. The construction machine according to claim 1,
A construction machine further comprising a display device for displaying an operation position of the operation lever before starting the engine. A lower traveling body,
An upper swing body provided on the upper portion of the lower traveling body so as to be pivotable in the left-right direction;
A front working device provided at the front of the upper swing body so as to be rotatable in the vertical direction;
Engine,
A hydraulic pump driven by the engine;
A hydraulic actuator that is supplied with pressure oil from the hydraulic pump and drives the front working device;
An electric operation lever device having an operation lever operable in a plurality of operation directions from a neutral position during non-operation, and outputting an electric signal corresponding to the operation direction and operation amount of the operation lever;
In an engine start method for a construction machine, comprising a control device that converts an electric signal output from the electric operation lever device into an operation signal of the hydraulic actuator,
A neutral holding operation for holding the operation lever in the neutral position, which is executed between the start of the control device and the start of the engine, and the operation lever in any one of the plurality of operation directions are maximized. An operation pattern sequence including at least one operation pattern is generated based on a full lever operation to be operated, and the engine can be started when the operation pattern sequence matches a predetermined operation pattern sequence registered in advance. An engine starting method for a construction machine.

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