JP2016022915A - Service car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a service car, operability of which can be enhanced at the time of authentication processing of an engine starting lock function.SOLUTION: A control apparatus transfers a liquid crystal display part to an authentication screen, in which first to n-th (n is an integer of 2 or more) display frames according to the number of digits of storage authentication information are displayed, according to an operation of a key member from an Off-position to an ON-position. Symbols inputted by an input operation member in the authentication screen are displayed on the first to n-th display frames respectively, and it is determined whether input authentication information defined by the symbols displayed on the first to n-th display frames is coincident with the storage authentication information or not.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a working vehicle having an engine start lock function that permits engine start only when input authentication information matches stored authentication information.

  It has been conventionally proposed to provide an engine start lock function in a vehicle such as a work vehicle.

  For example, in Patent Document 1 below, the number of operations of the key member at the start position is used as input authentication information, and engine start is permitted only when the input authentication information matches the stored authentication information stored in advance. A vehicle configured as described above is disclosed.

  The configuration described in Patent Document 1 uses the number of operations of the existing key member to the start position as input authentication information, and is useful in that an engine start lock function can be obtained without requiring an additional member. However, since authentication is performed based on the number of operations to the start position of a single key member, there is a limit in terms of safety (number of combinations of authentication information).

  Further, since the number of operations to the start position of the key member is used as the input authentication information, the operator has more than the number of times the key member is stored as the storage authentication information due to some operation mistake, and the start position If this operation is performed, the input authentication information cannot be corrected, and as a result, it is necessary to restart the authentication work from the beginning.

  In Patent Document 2 below, stored authentication information in which the input authentication information is stored in advance using the number of operations of the first switch that can be operated manually and the number of operations of the second switch that can be operated manually as input authentication information. A work vehicle is disclosed that is configured to allow the engine to start only if it matches.

  The configuration described in Patent Document 2 uses the number of operations of the two switches, the first and second switches, as input authentication information, and uses the number of operations of the key member, which is a single operation member, as input authentication. Compared to the configuration described in Patent Document 1 used as information, safety (the number of combinations of authentication information) can be improved.

  However, even in the configuration described in Patent Document 2, the number of times the switch is operated is used as input authentication information. Therefore, the operator can use the first or second switch as storage authentication information due to some operation error. If the operation is performed more than the stored number of times, the input authentication information cannot be corrected, and as a result, it is necessary to start the authentication work from the beginning.

JP 2005-255134 A JP 2013-028190 A

  The present invention has been made in view of such a conventional technique, and is a working vehicle having an engine start lock function that permits engine start only when input authentication information matches stored authentication information. The purpose is to provide a working vehicle capable of improving the operability of the old age.

  In order to achieve the above object, the present invention responds to the operation of the key member at the start position only when the input authentication information input via the input operation member matches the stored authentication information stored in advance. A work vehicle having an engine start lock function that permits engine start by a starter motor, comprising: an input operation member for inputting the input authentication information; a display means having a liquid crystal display; and a control device, The control device displays the liquid crystal display unit in accordance with the operation of the key member from the off position to the on position, for the first to nth (n is an integer of 2 or more) according to the number of digits of the stored authentication information. The display is shifted to an authentication screen on which a frame is displayed, and a symbol input by the input operation member on the authentication screen is displayed on each of the first to nth display frames, and the first to nth display frames are displayed. The input authentication information bounded by the indicated symbols to provide a determined working vehicle whether matches in the storage credentials.

The stored authentication information may be formed by a symbol in which each digit is selected from a predetermined symbol group.
In this case, the input operation member can perform a first operation rotated around an axis and a second operation pressed in the axial direction, and the control device displays the first display frame on the authentication screen. When the input operation state is enabled, the symbols of the symbol group are sequentially displayed on the first display frame in response to the first operation on the input operation member, and the second operation on the input operation member is performed. While the displayed symbol is displayed in the first display frame, the same processing is repeated until the nth display frame, with the next display frame being in an input enabled state, and the input to the nth display frame. After the second operation on the operation member, it may be configured to determine whether or not the input authentication information matches the stored authentication information.

  Preferably, the control device displays a confirmation icon and a return icon on the authentication screen in addition to the first to nth display frames, and performs a second operation on the input operation member with respect to the nth display frame. In response, a state in which the confirmation icon and the return icon can be selected by a first operation on the input operation member and an icon being selected can be determined by a second operation on the input operation member is displayed. When the icon is determined and operated, it is determined whether or not the input authentication information currently displayed in the display frame matches the stored authentication information. When the return icon is determined and operated, the input authentication information is determined. May be configured to transition to a re-enterable state.

  Preferably, the control device switches the liquid crystal display unit to an engine start lock function switching screen when an artificial operation is performed after it is determined that the input authentication information matches the stored authentication information on the authentication screen. The authentication process similar to the authentication process on the authentication screen can be performed on the engine start lock function switching screen, and the input authentication information input on the engine start lock function switching screen matches the stored authentication information. In some cases, it is possible to enable the artificial selection of whether the engine start restriction function is valid or invalid.

  According to the work vehicle according to the present invention, the control device changes the liquid crystal display unit according to the operation of the key member from the off position to the on position, and the first to nth (n is the number n) corresponding to the number of digits of the stored authentication information. (An integer of 2 or more) is transferred to an authentication screen on which a display frame is displayed, and a symbol input by the input operation member on the authentication screen is displayed on each of the first to nth display frames. Since it is configured to determine whether or not the input authentication information defined by the symbol displayed in the nth display frame matches the stored authentication information, the authentication process in the engine start lock function Operability can be improved.

FIG. 1 is a perspective view of a working vehicle according to an embodiment of the present invention. FIG. 2 is a rear view of the working vehicle. FIG. 3 is a schematic diagram of transmission of the working vehicle. FIG. 4 is a control block diagram of the working vehicle. FIG. 5 is a control flow of the engine start control mode. FIG. 6 is a schematic diagram of an example of an authentication screen in the liquid crystal display unit. FIG. 7 is a control flow of an engine start lock function switching subroutine.

Hereinafter, preferred embodiments of a working vehicle according to the present invention will be described with reference to the accompanying drawings.
1 to 3 show a perspective view, a rear view, and a transmission schematic diagram of the working vehicle 1 according to the present embodiment, respectively.

As shown in FIGS. 1-3, the said working vehicle 1 which concerns on this Embodiment has comprised the form of the tractor.
Specifically, as shown in FIGS. 1 to 3, the working vehicle 1 includes a vehicle frame 10, a driver seat 15 supported by the vehicle frame 10, an engine 50 supported by the vehicle frame 10, and left and right A pair of front wheels 20F, a pair of left and right rear wheels 20R, a traveling system transmission structure 60 that transmits rotational power from the engine 50 to driving wheels, a PTO shaft 95 that outputs rotational power to the outside, and the engine 50, a PTO transmission structure 80 that transmits the rotational power from 50 to the PTO shaft 95, and a control device 100.

  As shown in FIG. 3, in the present embodiment, the traveling system transmission structure 60 acts as a hydraulic continuously variable transmission (HST) 61, a forward / reverse switching device 62, and a sub-transmission device that act as a main transmission. A gear type multi-stage transmission 63 is provided.

As shown in FIG. 3, the HST 61 is configured to continuously change the rotational power from the engine 50 input via the main clutch 51.
Note that reference numerals 52 and 53 in FIG. 3 denote a charge pump and an auxiliary pump that are driven by the rotational power from the engine 50 input via the main clutch 51.

  The forward / reverse switching device 62 is configured to switch and output the rotational direction of the rotational power operatively transmitted from the HST 61.

  Specifically, the forward / reverse switching device 62 is in a forward state in which the rotational power from the HST 61 is output to the drive wheel as rotational power in the normal rotation direction (forward direction), and the rotational power from the HST 61 is in the reverse direction ( The vehicle is configured to be able to selectively take a reverse state in which the rotational power in the reverse direction) is output toward the drive wheel and a neutral state in which power transmission from the HST 61 to the drive wheel is interrupted.

  The gear type multi-stage transmission 63 is disposed on the downstream side in the transmission direction of the forward / reverse switching device 62, and multi-speeds the rotational power input via the forward / reverse switching device 62 to change the traveling system. This is transmitted to the output shaft 65.

  Further, in the present embodiment, as shown in FIG. 3, the traveling system transmission structure 60 is further different from the pair of rear wheels 20R that act as the main drive wheels by the rotational power of the traveling system output shaft 65. The main drive wheel side differential gear device 66 that transmits the motion, the sub drive wheel drive device 70 that inputs the rotational power of the traveling system output shaft 65, and the rotational power from the sub drive wheel drive device 70 acts as a sub drive wheel. And a pair of left and right brake devices 75L and 75R capable of applying a braking force to the pair of left and right main drive wheels, respectively. . In FIG. 3, only the left brake device 75L is shown.

  In the sub drive wheel drive device 70, the sub drive wheel (the front wheel 20F in the present embodiment) is changed to the main drive wheel (the present embodiment) in response to an artificial operation to the sub drive wheel drive switching operation member 145. The rear wheels 20R), a four-speed constant speed state in which the rotational power of the traveling system output shaft 65 is output to the sub drive wheels so as to be always driven at a constant speed, and the vehicle turning angle is a predetermined angle or less. In this case, when the sub drive wheel is driven at the same speed as the main drive wheel and the turning angle exceeds a predetermined angle, the sub drive wheel is faster than the main drive wheel (for example, about double speed). It is possible to selectively take a 4-drive turning speed increasing state in which the rotational power of the traveling system output shaft 65 is output to the sub drive wheels so as to be driven and a 2-drive state in which the sub drive wheels are not driven. It is configured.

  The pair of brake devices 75L and 75R can individually take a brake operation state and a brake release state in accordance with a manual operation to a pair of brake operation members (not shown) that are manually operated. .

Next, the PTO transmission structure 80 will be described.
As shown in FIG. 3, in the present embodiment, the PTO transmission structure 80 includes a PTO clutch device 81 and a PTO transmission device 82.

The PTO clutch device 81 is configured to selectively transmit or cut off rotational power from the engine 50 input via the main clutch 51.
The PTO transmission device 82 is configured to change the rotational power from the engine 50 input via the PTO clutch device 81 and output it to the PTO shaft 95.

FIG. 4 shows a block diagram of the control device 100.
As shown in FIG. 4, in the present embodiment, the control device 100 includes a plurality of controllers such as a main machine controller 101, an engine controller 102, and a meter controller 103.

  Corresponding sensors and actuators are electrically connected to the plurality of controllers 101, 102, and 103, respectively, and the plurality of controllers 101, 102, and 103 are electrically connected to each other via a CAN communication bus 105. Has been.

  Each of the controllers 101, 102, and 103 stores a calculation unit (hereinafter referred to as a CPU) including a control calculation unit that executes calculation processing based on signals input from the various sensors and the like, a control program, control data, and the like. ROM, an EEPROM in which setting values are stored without being lost even when the power is turned off, and an EEPROM in which the setting values can be rewritten, a RAM that temporarily holds data generated during calculation by the calculation unit, etc. Including a storage unit.

The working vehicle 1 further includes a display device having a liquid crystal display unit.
The display device includes, for example, a meter panel 400 (see FIG. 4) disposed in front of the driver seat 15 and a sub-display 450 (see FIG. 4) disposed on the side of the driver seat 15. obtain.

The meter panel 400 functions as, for example, a tachometer that displays the rotational speed of the engine 50, a plurality of display lamps that display whether or not various control modes included in the work vehicle 1 are activated, and the liquid crystal display unit. And a liquid crystal display unit.
The sub display 450 may include a liquid crystal display unit that functions as the liquid crystal display unit.

  Here, the engine start lock function provided in the working vehicle 1 according to the present embodiment will be described.

  The engine start lock function is used only when the input authentication information input via the input operation member 480 (see FIG. 4) matches the stored authentication information stored in advance. The starter motor 55 (see FIG. 4) is allowed to start the engine 50 (see FIG. 4) according to the operation to the start position.

That is, in a work vehicle that does not have the engine start lock function, when the key member is positioned at the start position, the starter motor is activated to start the engine.
The engine start lock function applies a restriction by password authentication to the engine start.

  Specifically, the control device 100 activates an engine start control mode in response to an operation of the key member 110 from an off position to an on position.

  FIG. 5 shows a control flow in the engine start control mode.

First, the control device 100 determines whether or not the engine start lock function is enabled (step S1).
That is, in the present embodiment, it is possible to artificially switch between enabling and disabling the engine start lock function.
This switching operation of the engine start lock function will be described later.

  If YES in step S1, that is, if the engine start lock function is enabled, the control device 100 shifts the liquid crystal display unit to the authentication screen (step S2).

FIG. 6 shows a schematic diagram of an example of the authentication screen 455.
The control device 100 stores n-digit (n is an integer of 2 or more) storage authentication information in advance, and the control device 100 displays on the authentication screen 455 a number corresponding to the number of digits of the storage authentication information. The 1st to nth display frames are displayed.

  In the example shown in FIG. 6, the stored authentication information has four digits, and accordingly, four display frames from first to 4460 (1) to 460 (4) are displayed.

  The storage authentication information can be stored in a storage unit of the control device 100, for example, an EEPROM that is not lost and can be rewritten even when the power is turned off.

Next, the control device 100 performs an input authentication information input process using the input operation member 480 on the authentication screen 455 (step S3).
Specifically, the control device 100 performs the above-described operation on each of the first to nth display frames (first to fourth display frames 460 (1) to 460 (4) in the example of FIG. 6). A symbol input by the input operation member 480 is displayed.

  The control device 100 receives the input authentication information confirmation command (step S4), and performs an authentication process to determine whether or not the input authentication information matches the stored authentication information.

According to such a configuration, even if an input error of the input authentication information occurs, only the input error symbol among the symbols input to the first to nth display frames may be input again.
Therefore, the operability during the authentication process can be improved as compared with the conventional configuration in which the number of operations of any operation member is used as the input authentication information.

  The control device 100 can handle an artificial operation on any operation member in a state where symbols are input in all of the first to nth display frames as the confirmation command, or Completion of symbol input to all of the first to nth display frames can be handled as the confirmation command.

The input operation member 480 for inputting the input authentication information can take various forms.
In the present embodiment, as the input operation member 480, an operation member capable of performing a first operation rotated around an axis and a second operation pressed in the axial direction is used.
In addition, the code | symbol 480a in FIG. 4 is a sensor which detects the operation condition of the said input operation member.

In the present embodiment, the storage authentication information may be formed by symbols in which each of n digits is selected from a predetermined symbol group.
The predetermined symbol group includes, for example, 0 to 9 English letters A to F.

  In such a configuration, the control device 100 may be configured to perform the following process as the process of step S3.

  That is, the control device 100 makes the first display frame 460 (1) ready for input in a state where the liquid crystal display unit has been shifted to the authentication screen 455, and performs a first operation on the input operation member 480. In accordance with (rotation operation), the symbols of the symbol group (0 to 9 and A to F in the above example) are displayed in order on the first display frame 460 (1), and the input operation member 480 is displayed. The symbol displayed at the time when the second operation (pressing operation) is performed is provisionally determined as the symbol input to the first display frame 460 (1).

  The control device 100 performs the same processing by setting the next display frame 460 (2) in an input enabled state, and the same processing is performed up to the final nth display frame (the fourth display frame 460 (4) in the illustrated example). The above process is repeated, and a symbol is provisionally determined for each of the first to nth display frames.

  In this case, the confirmation process of the input authentication information in the step S4 may be configured to be performed using the input operation member 480 in which the first operation and the second operation are possible.

  That is, as shown in FIG. 6, the control device 100 displays the first to nth display frames (first to fourth display frames 460 (1) to 460 (4 in the illustrated example) on the authentication screen 455. In addition to)), a confirmation icon 465 and a return icon 466 can be displayed.

  Then, the control device 100 performs a second operation on the input operation member 480 with respect to the final n-th display frame (fourth display frame 460 (4) in the illustrated example). When the symbols for all of the first to nth display frames (first to fourth display frames 460 (1) to 460 (4) in the illustrated example) are provisionally determined, The confirmation icon 465 and the return icon 466 can be selected by one operation, and the selected icon can be determined by the second operation on the input operation member 480, and the determination operation of the confirmation icon 465 is used as the confirmation command. Can be handled.

  When the determination operation of the return icon 466 is performed, symbol input to the first to nth display frames (first to fourth display frames 460 (1) to 460 (4) in the illustrated example). Returned to processing.

  If YES in step S5, that is, if the input authentication information matches the stored authentication information, the control device 100 issues an engine start permission flag (step S7).

  For example, the control device 100 can notify the operator that the engine start is permitted by moving the liquid crystal display unit from the authentication screen 455 to a standard screen (not shown). It is also possible to display a permission notice on the authentication screen 455 and then shift to the standard screen.

  In this state, in response to an operation of the key member 480 to the start position by the operator, the operation of the starter motor 55 is permitted and the engine 50 is started.

  On the other hand, if NO in step S5, that is, if the input authentication information does not match the stored authentication information, the control device 100 can perform error processing.

  In the present embodiment, as the error process, the control device 100 starts the engine 50 for a predetermined period when the number of mismatches in the authentication process in step S5 exceeds a predetermined number of times continuously. Configured to prohibit.

  Specifically, in the case of NO in step S5, the control device 100 increases the number of authentication processes by one (step S11), and the number of authentication processes after increasing the count is equal to or less than a predetermined number. It is determined whether or not there is (step S12).

  In the case of NO in step S12, that is, when the number of inconsistent authentication processes exceeds a predetermined number, the control device 100 prohibits the authentication operation for a predetermined period, and thereby, for a predetermined period. The engine 50 is configured to be prohibited from starting.

  In this case, if the answer is yes in step S5, that is, if the input authentication information matches the stored authentication information, the control device 100 performs a process of returning the count to zero. (Step S6).

Of course, other processing can be performed as the error processing.
For example, instead of or in addition to the start prohibition process of the engine 50 over a predetermined period, the control device 100 can display an error on the liquid crystal display unit in the case of NO in the step S5. .

  In the present embodiment, as a result of the coincidence determination in the authentication process in step S5, in the state where the engine start permission flag is output, the engine start lock function is switched between valid / invalid. Can be selected manually.

Specifically, when the engine start lock function switching command is input in the state where the engine start permission flag is output (YES in step S8), the control device 100 is an engine start lock function switching subroutine. (Step S9).
The engine start lock function switching command can be generated by, for example, a dedicated operation member or a predetermined operation of the input operation member 480.

  FIG. 7 shows a control flow of the engine start lock function switching subroutine.

  When receiving the engine start lock function switching command (YES in step S8 in FIG. 5), the control device 100 shifts the liquid crystal display unit to an engine start lock function switching screen (not shown).

  The control device 100 performs an authentication process similar to that in the authentication screen using the switching screen.

That is, the control device 100 causes the switching screen to display the first to nth display frames corresponding to the number of digits of the stored authentication information.
The control device 100 performs input authentication information input processing by the input operation member 480 on the switching screen (step S22).

  The control device 100 receives the input authentication information confirmation command (step S23), and performs an authentication process as to whether or not the input authentication information matches the stored authentication information (step S24).

  In the case of NO in step S24, the control device 100 can display an error on the liquid crystal display unit and end the subroutine.

  On the other hand, in the case of YES in step S24, the control device 100 determines whether or not to enable the engine start lock function based on the artificial command signal (step S25), and enables the engine start lock function. Enable or disable processing.

  That is, if NO in step S25, that is, if an artificial command signal for invalidating the engine start lock function is input, the control device 100 invalidates the engine start lock function (step S41), and the subroutine Exit.

  If YES in step S25, that is, if an artificial command signal for enabling the engine start lock function is input, the control device 100 enables the engine start lock function (step S26).

  In the present embodiment, the stored authentication information can be changed while the engine start lock function is enabled.

  Specifically, on the downstream side of the processing step from step S26, the control device 100 determines whether or not the stored authentication information needs to be changed based on an artificial command signal (step S27).

If NO in step S27, that is, if it is not necessary to change the stored authentication information, the control device 100 ends the subroutine.
In this case, the stored authentication information stored at that time is valid as it is.

  In the case of YES in step S27, that is, when the storage authentication information needs to be changed, the control device 100, after inputting new storage authentication information (step S28) and confirming it (step S29), The new storage authentication information is updated and stored in a storage unit of the control device 100, for example, an EEPROM that is not lost even when the power is turned off and is rewritable.

  The input of new stored authentication information can be performed by the same method as the input authentication information input on the authentication screen or the switching screen.

1 Working vehicle 50 Engine 55 Starter motor 100 Control device 110 Key member 400 Meter panel (display means)
450 Sub-display (display means)
455 Authentication screen 460 Display frame 465 Confirmation icon 466 Return icon 480 Input operation member

Claims (4)

An engine start lock that allows the starter motor to start the engine in response to an operation to the start position of the key member only when the input authentication information input via the input operation member matches the stored authentication information stored in advance. A working vehicle with functions,
An input operation member for inputting the input authentication information, a display unit having a liquid crystal display unit, and a control device;
The controller controls the liquid crystal display unit according to the operation of the key member from the off position to the on position, for the first to nth (n is an integer of 2 or more) according to the number of digits of the stored authentication information. A transition is made to an authentication screen on which a display frame is displayed, a symbol input by the input operation member on the authentication screen is displayed on each of the first to nth display frames, and the first to nth display frames are displayed. A work vehicle characterized in that it is determined whether or not the input authentication information defined by the symbol displayed on the screen matches the stored authentication information. The storage authentication information is formed by symbols each digit selected from a predetermined symbol group,
The input operation member is capable of a first operation rotated about an axis and a second operation pressed in the axial direction,
In the authentication screen, the control device makes the first display frame ready for input, and sequentially displays the symbols of the symbol group in the first display frame in response to a first operation on the input operation member. The same processing is performed with the next display frame being ready for input while the symbol displayed at the time when the second operation is performed on the input operation member is displayed on the first display frame. To the nth display frame, and after the second operation on the input operation member for the nth display frame, it is determined whether or not the input authentication information matches the stored authentication information. The working vehicle according to claim 1.   The control device displays a confirmation icon and a return icon on the authentication screen in addition to the first to nth display frames, and according to a second operation to the input operation member for the nth display frame. A state in which the confirmation icon and the return icon can be selected by the first operation on the input operation member, and the selected icon can be determined by the second operation on the input operation member, and the confirmation icon is determined. When operated, it is determined whether or not the input authentication information currently displayed in the display frame matches the stored authentication information. When the return icon is determined, the input authentication information is re-input. The working vehicle according to claim 2, wherein the working vehicle is shifted to a possible state.   When it is determined that the input authentication information matches the stored authentication information on the authentication screen, the control device causes the liquid crystal display unit to shift to the engine start lock function switching screen when an artificial operation is performed. The authentication process similar to the authentication process on the authentication screen is enabled also on the engine start lock function switching screen, and when the input authentication information input on the engine start lock function switching screen matches the stored authentication information, 4. The work vehicle according to claim 2, wherein the engine start restriction function can be selected manually or invalid.

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