JP6393924B2 - Work vehicle - Google Patents

Description

The present invention relates to a work vehicle, and more particularly to a work vehicle including a display with an input setting device .

  2. Description of the Related Art Conventionally, there has been known a work vehicle capable of leveling the surface of a farm field by using a laser leveler (see Patent Document 1). Such a work vehicle appropriately adjusts the height position of the work machine using the laser beam emitted horizontally as a reference plane.

  By the way, such a work vehicle can set the tolerance | permissible_range with respect to a reference plane, and the deviation | shift amount of a tolerance | permissible_range regarding the height position of a working machine.

  Further, if the operator can confirm that the height position of the work machine is within the allowable range and the state where the height position is outside the allowable range, the operator can grasp the work status. In a conventional work vehicle, such a state is simply displayed with a simple display. On the other hand, there has been a demand for a work vehicle that allows an operator to more easily grasp the work situation.

JP-A-8-54232

  An object of the present invention is to provide a work vehicle in which an operator can easily grasp the work situation of leveling a farm field.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

According to a first aspect of the present invention, there is provided a work vehicle capable of adjusting a height position of a work machine using a laser beam emitted horizontally as a reference plane, and a display with an input setting device is provided in the vicinity of a driver seat of the work vehicle. And a screen showing a state where the height position of the work machine is within an allowable range set with respect to the reference plane and a state outside the allowable range are displayed on the display, On the setting screen, a slide bar indicating the allowable range width and the allowable range deviation amount with respect to the reference plane is displayed, and the allowable range width and the deviation amount can be set by the input setting device, respectively. When increasing the width of the allowable range, the upper limit value moves upward and the lower limit value moves downward, and when decreasing the width of the allowable range, the upper limit value moves downward and the lower limit value There is to move upward.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, the display displays a screen representing a state where the height position of the work machine is within the allowable range set with respect to the reference plane and a state where the height position is outside the allowable range. . Thereby, the operator can grasp | ascertain easily the work condition which leveles a farm field.

  The display also displays a screen for setting the allowable range. Thereby, since the operator can set the allowable range while looking at the screen, such an operation becomes easy.

  Further, the display displays a screen for setting the deviation amount of the allowable range. Accordingly, the operator can set the deviation amount within the allowable range while looking at the screen, so that the operation becomes easy.

It is an external appearance perspective view of a tractor. It is the figure seen from the arrow X of FIG. It is the figure seen from the arrow Y of FIG. It is the figure seen from the arrow Z of FIG. It is a figure which shows the link mechanism of a tractor. It is a figure which shows the height automatic control of a rotary. It is a figure which shows the inclination automatic control of a rotary. It is a figure which shows the tractor which drive | works a farm field. It is a figure which shows the driver's seat of a tractor, and its periphery. It is a figure which shows an operator's visual field. It is a figure which shows the information network of a tractor. It is a figure which shows a display. It is a figure which shows the control system regarding a display. It is a figure which shows the screen displayed on the display. It is a figure which shows the screen displayed on the display. It is a figure which shows the screen displayed on the display. It is a figure which shows the screen displayed on the display. It is a figure which shows the screen displayed on the display. It is a figure which shows the screen displayed on the display. It is a figure which shows the screen displayed on the display.

  The technical idea of the present invention can be applied to any work vehicle. Below, it demonstrates using the tractor which is a typical work vehicle.

  First, the tractor 1 will be briefly described.

  FIG. 1 shows a tractor 1. 2 is a view as seen from the arrow X in FIG. 1, and FIG. 3 is a view as seen from the arrow Y in FIG. FIG. 4 is a view seen from the arrow Z in FIG. In the figure, the front-rear direction, the left-right direction, and the vertical direction of the tractor 1 are shown.

  The tractor 1 mainly includes a frame 11, an engine 12, a transmission 13, a front axle 14, and a rear axle 15. Further, the tractor 1 includes a cabin 16. The cabin 16 has a cockpit inside, and an accelerator pedal 162 and a shift lever 163 are arranged in addition to the driver's seat 161 (see FIG. 9).

  The frame 11 forms a skeleton at the front portion of the tractor 1. The frame 11 constitutes the chassis of the tractor 1 together with the transmission 13 and the rear axle 15. The engine 12 described below is supported by the frame 11.

  The engine 12 converts thermal energy obtained by burning fuel into kinetic energy. That is, the engine 12 generates rotational power by burning fuel. The engine 12 is connected to an engine control device (not shown). When the operator operates the accelerator pedal 162 (see FIG. 9), the engine control device changes the operating state of the engine 12 according to the operation. Further, the engine 12 is provided with an exhaust purification device 12E. The exhaust purification device 12E oxidizes particulates, carbon monoxide, hydrocarbons, etc. contained in the exhaust.

  The transmission 13 transmits the rotational power of the engine 12 to the front axle 14 and the rear axle 15. The rotational power of the engine 12 is input to the transmission 13 via a coupling mechanism. The transmission 13 is provided with a continuously variable transmission (not shown). When the operator operates the shift lever 163 (see FIG. 9), the continuously variable transmission changes the operating state of the transmission 13 according to the operation.

  The front axle 14 transmits the rotational power of the engine 12 to the front tire 141. The rotational power of the engine 12 is input to the front axle 14 via the transmission 13. The front axle 14 is provided with a steering device (not shown). When the operator operates the handle 164 (see FIG. 9), the steering device changes the steering angle of the front tire 141 according to the operation.

  The rear axle 15 transmits the rotational power of the engine 12 to the rear tire 151. The rotational power of the engine 12 is input to the rear axle 15 via the transmission 13. The rear axle 15 is provided with a PTO output device (not shown). When the operator operates the PTO switch 165 (see FIG. 9), the PTO output device transmits rotational power to the working machine to be pulled according to the operation. The rear axle 15 is provided with a link mechanism 35 (see FIG. 5).

  Next, the link mechanism 35 of the tractor 1 will be described.

  FIG. 5 shows the link mechanism 35 of the tractor 1. In the following, it is assumed that the rotary 10 is attached to the link mechanism 35. FIG. 6 shows automatic height control of the rotary 10. FIG. 7 shows the automatic tilt control of the rotary 10.

  The link mechanism 35 can realize automatic height control and tilt automatic control of the rotary 10. The link mechanism 35 includes a top bracket 351 and a top link 352. The link mechanism 35 includes a lower bracket 353 and a lower link 354. Further, the link mechanism 35 includes a lift arm 355, an elevating actuator 356, a lift link 357, and a tilting actuator 358.

  The top bracket 351 is attached to the rear part of the rear axle 15. The top bracket 351 has a hinge portion in which two plates that are parallel to each other are welded. The hinge part is provided with a pin hole penetrating the two plates in the horizontal direction.

  The top link 352 is attached to the hinge portion of the top bracket 351. The top link 352 is rotatably connected around the pin P1 by inserting the pin P1 in a state where the pin hole of the clevis attached to the base end portion and the pin hole of the top bracket 351 are overlapped. ing. Further, the top link 352 is rotatable around the pin (not shown) by inserting a pin with the pin hole of the clevis attached to the tip and the pin hole of the rotary 10 being overlapped. It is connected to.

  The lower bracket 353 is attached to the lower portion of the rear axle 15. The lower bracket 353 has a hinge portion in which two plates that are parallel to each other are welded. The hinge part is provided with a pin hole penetrating the two plates in the horizontal direction.

  The lower link 354 is attached to the hinge portion of the lower bracket 353. The lower link 354 is rotatably connected around the pin P2 by inserting the pin P2 in a state where the pin hole provided in the base end portion and the pin hole of the lower bracket 353 are overlapped. Further, the lower link 354 is connected to a rod (not shown) of the rotary 10 so that the hook attached to the tip is pivoted about the rod.

  The lift arm 355 is attached to the side portion of the rear axle 15. The lift arm 355 is rotatably connected around the pin P3 by fitting the pin P3 of the rear axle 15 into a pin hole provided at the base end. The lift arm 355 has a clevis formed at the tip, and a universal joint 355J is attached to the clevis.

  The lifting actuator 356 is attached to the center of the lift arm 355. The lift actuator 356 is rotatably connected around the pin P4 by inserting the pin P4 in a state where the pin hole of the clevis attached to the cylinder and the pin hole of the lift arm 355 are overlapped. Yes. Further, the lifting actuator 356 is rotatable about the pin P5 when the pin P5 is inserted in a state where the pin hole of the clevis attached to the piston rod and the pin hole of the lower bracket 353 are overlapped. It is connected.

  The lift link 357 is attached to the left lift arm 355 and the lower link 354. The lift link 357 is rotatably connected around the pin P6 by inserting the pin P6 with the pin hole of the clevis attached to the base end portion and the pin hole of the universal joint 355J being overlapped. ing. Further, the lift link 357 is rotatably connected around the pin P7 by inserting the pin P7 in a state where the pin hole of the clevis attached to the tip and the pin hole of the lower link 354 are overlapped. ing.

  The tilting actuator 358 is attached to the right lift arm 355 and the lower link 354. The tilting actuator 358 is rotatably connected around the pin P8 by inserting the pin P8 in a state where the pin hole of the clevis attached to the cylinder and the pin hole of the universal joint 355J are overlapped. Yes. Further, the tilting actuator 358 is rotatably connected around the pin P9 by inserting the pin P9 with the pin hole of the clevis attached to the piston rod and the pin hole of the lower link 354 being overlapped. Has been.

  With such a structure, when the piston rod of the lifting actuator 356 is slid and pushed out (when the lifting actuator 356 extends), the lift arm 355 rotates upward. Then, since the lift arm 355 pulls up the left and right lower links 354 via the lift link 357 and the tilting actuator 358, the height of the rotary 10 increases (see arrow Ra in FIG. 6A). Therefore, if this operation is realized in a situation where the rotary 10 is depressed, the tilling depth is maintained in a constant state.

  Conversely, when the piston rod of the lifting actuator 356 is slid and pulled (when the lifting actuator 356 contracts), the lift arm 355 rotates downward. Then, since the lift arm 355 pushes down the left and right lower links 354 via the lift link 357 and the tilting actuator 358, the height of the rotary 10 is lowered (see arrow Rb in FIG. 6B). Therefore, if this operation is realized in a situation where the rotary 10 is lifted, the tilling depth is maintained in a constant state.

  In addition, when the piston rod of the tilting actuator 358 is slid and pushed out (when the tilting actuator 358 is extended), only the right lower link 354 to which the tilting actuator 358 is attached rotates downward. Become. Then, while the left lower link 354 is maintained as it is, the right lower link 354 is pushed down, so that the rotary 10 is tilted downward (see arrow Rc in FIG. 7A). Therefore, if this operation is realized while the tractor 1 is tilted to the left, the rotary 10 is maintained in a horizontal state.

  On the contrary, when the piston rod of the tilting actuator 358 is slid and pulled (when the tilting actuator 358 contracts), only the right lower link 354 to which the tilting actuator 358 is attached rotates upward. Become. Then, while the lower link 354 on the left side is maintained as it is, the lower link 354 on the right side is pulled up, so that the rotary 10 is inclined upward (see the arrow Rd in FIG. 7B). Therefore, if this operation is realized while the tractor 1 is tilted to the right, the rotary 10 is maintained in a horizontal state.

  Next, the tractor 1 that uses the rotary 10 to level the field will be described.

  FIG. 8 shows the tractor 1 traveling in the field.

  A rotary 10 is attached to the tractor 1 via a link mechanism 35. The tractor 1 can move the rotary 10 up and down by operating the lifting actuator 356.

  Laser light L is emitted by a laser oscillator 63. The laser oscillator 63 is installed outside the field, for example, on the ridge R. At this time, the laser oscillator 63 needs to be installed so that the laser beam can be emitted horizontally. Here, a surface formed by the horizontally emitted laser light is defined as “reference surface H”.

  The laser light L is detected by a laser receiver 65. The laser receiver 65 is attached to the support column 64 of the rotary 10. The control device 3, which will be described later, operates the lifting actuator 356 based on a signal from the laser receiver 65 (see FIG. 13). With such a configuration, the tractor 1 can appropriately adjust the height position of the rotary 10 with the laser beam L as the reference plane H.

  Next, the cockpit of the tractor 1 will be described.

  FIG. 9 shows the driver seat 161 and its surroundings. FIG. 10 shows the field of view of the operator.

  As described above, the cabin 16 has a cockpit inside, and an accelerator pedal 162 and a shift lever 163 are arranged in addition to the driver's seat 161. A brake pedal 166, a clutch pedal 167, a reverser lever 168, a speed dial 169, an instrument panel 170, a control panel 171 and the like are disposed around the driver seat 161. The operator can operate the tractor 1 by operating the accelerator pedal 162 and the shift lever 163 while sitting on the driver's seat 161.

  Further, the tractor 1 includes the display 2 in the vicinity of the driver seat 161. The display 2 is disposed on the right front side of the driver seat 161 so that the operator can operate with the right hand. Hereinafter, the information network of the tractor 1 will be briefly described, and the display 2 and a control system related to the display 2 will be described.

  FIG. 11 shows an information network of the tractor 1. FIG. 12 shows the display 2. FIG. 13 shows a control system related to the display 2.

  The tractor 1 is provided with information networks in various places so that the maximum performance can be exhibited. Specifically, in addition to the engine 12, the transmission 13, the instrument panel 170, the control panel 171, and the display 2 constitute a controller area network (CAN) that can share information with each other.

  In the tractor 1, the display 2 is disposed on the side console (see FIGS. 9 and 10). The display 2 has a liquid crystal panel 21, an encoder dial 22, and an enter button 23. The display 2 has five command buttons 24, 25, 26, 27, and 28. Each button has a built-in backlight 29 that uses an LED (Light Emitting Diode) or the like as a light source.

  The liquid crystal panel 21 is provided in the center of the front surface of the display 2. The liquid crystal panel 21 can display a predetermined screen based on an instruction from the control device 3. For example, the liquid crystal panel 21 can display the opening screen S1 based on an instruction from the control device 3 (see FIG. 14). The liquid crystal panel 21 can display other screens based on instructions from the control device 3 (see FIGS. 15 to 20). The liquid crystal panel 21 may be a so-called touch panel.

  The encoder dial 22 is provided on the right side of the upper surface of the display 2. The encoder dial 22 can transmit the operator's intention to scroll the tab or traverse the highlight to the control device 3 when selecting the element displayed on the liquid crystal panel 21. For example, the encoder dial 22 can transmit the operator's intention to scroll the tab to the control device 3 when selecting the displayed numbers or English characters (see FIG. 15). The encoder dial 22 can transmit the operator's intention to traverse the highlight to the control device 3 when selecting the displayed icon (see FIGS. 16 and 17).

  The enter button 23 is provided integrally with the encoder dial 22. The enter button 23 can transmit to the control device 3 the operator's intention that one of the elements displayed on the liquid crystal panel 21 has been determined. For example, the enter button 23 can transmit the operator's intention to the effect of determining one of the displayed numbers or English characters to the control device 3 (see FIG. 15). Moreover, the enter button 23 can transmit the operator's intention to the effect that the one icon has been determined among the displayed icons to the control device 3 (see FIGS. 16 and 17). In the display 2, the enter button 23 has a structure in which the encoder dial 22 itself is pushed, but may have a structure in which a push button is provided on the upper end surface of the encoder dial 22.

  The command buttons 24, 25, and 26 are provided on the upper front portion of the display 2. The command buttons 24, 25, and 26 can transmit an operator's intention to switch to another screen to the control device 3 when a predetermined screen is displayed on the liquid crystal panel 21. For example, the command buttons 24 and 25 transmit the operator's intention to switch to the shortcut screen (the screen arbitrarily set by the operator) to the control device 3 when the home screens S3 and S4 are displayed on the liquid crystal panel 21. (See FIGS. 16 and 17). The command button 26 indicates to the control device 3 the operator's intention to switch to the home screens S3 and S4 when the laser screen S5, the ON grade width screen S6 or the offset position screen S7 is displayed on the liquid crystal panel 21. Can be transmitted (see FIGS. 18 to 20).

  A command button 27 is also provided at the upper front of the display 2. Specifically, it is provided at a position adjacent to the command button 26. As with the enter button 23, the command button 27 can transmit the operator's intention to the effect that the one element has been determined to the control device 3. For example, the command button 27 can transmit the operator's intention to the effect of determining one of the displayed numbers or English characters to the control device 3 (see FIG. 15). Further, the command button 27 can transmit the operator's intention to the effect that the one of the displayed icons has been determined to the control device 3 (see FIGS. 16 and 17). Further, the command button 27 can transmit the operator's intention to store the setting items to the control device 3 (see FIGS. 19 and 20).

  A command button 28 is also provided at the upper front of the display 2. Specifically, it is provided at a position adjacent to the command button 27. The command button 28 can transmit the operator's intention to return to the previous screen to the control device 3 when a predetermined screen is displayed on the liquid crystal panel 21. For example, the command button 28 can transmit the operator's intention to return to the home screen S3 to the control device 3 when another home screen S4 is displayed on the liquid crystal panel 21 (see FIG. 17). Further, the command button 28 can transmit the operator's intention to return to the laser screen S5 to the control device 3 when the ON grade width screen S6 or the offset position screen S7 is displayed on the liquid crystal panel 21 (FIG. 19, FIG. 20).

  The control device 3 includes a processing unit 30 and a storage unit 31. The processing unit 30 includes a microcomputer such as a CPU (Central Processing Unit).

  The storage unit 31 includes a memory such as a ROM (Random Access Read Only Memory) that cannot be rewritten, a volatile memory such as a RAM (Random Access Memory), a hard disk drive, and a flash memory. Information such as programs and maps is stored in the storage unit 31. The processing unit 30 can execute a program stored in the ROM after reading the program on the RAM.

  The processing unit 30 recognizes the height position of the laser light L detected by the laser receiver 65. The processing unit 30 calculates the operation amount of the lifting actuator 356 based on the information on the height position of the laser light L and the information stored in the storage unit 31. The control device 3 operates the lifting actuator 356 based on the calculation result. In this way, the control device 3 adjusts the height position of the rotary 10 by operating the lifting actuator 356.

  Hereinafter, an operation method for setting an allowable range (an ON-grade width Gw (see FIG. 19) described later) and a deviation amount (an offset position Os (see FIG. 20) described later) of the allowable range with respect to the reference plane H will be described below. Will be described.

  14 to 20 show screens displayed on the display 2. However, each figure shows only a part necessary for the description of the present embodiment.

  First, an opening screen S1 is displayed on the display 2 (see FIG. 14). On the opening screen S1, a symbol mark Sm is displayed near the center. The symbol mark Sm is a design symbolizing the supplier manufacturer. The symbol mark Sm floats on a black background image and gives a strong impression to the operator.

  Next, the lock release screen S2 is displayed on the display 2 (see FIG. 15). On the unlock screen S2, scroll boxes Sb1, Sb2, Sb3, and Sb4 for inputting the password are displayed in a horizontal row. Any one of the scroll boxes Sb1, Sb2, Sb3, and Sb4 is highlighted (refer to part H in the figure). The scroll boxes Sb1, Sb2, Sb3, and Sb4 can scroll numbers from 0 to 9 or English letters from A to F. The operator can select a number or alphabet by turning the encoder dial 22 and press the enter button 23 to determine.

  In the unlock screen S2, it is possible to select numbers or letters by pressing the command buttons 25 and 26 and to determine by pressing the command button 27. The decision can also be canceled by pressing the command button 28. In addition, if the password is wrong, a message to that effect is displayed. On the unlock screen S2, a dialog box Db1 in which the name of the operator is written and a dialog box Db2 in which the work schedule is written are displayed. The operator can grasp his / her work schedule from these dialog boxes Db1 and Db2.

  Next, the home screen S3 is displayed on the display 2 (see FIG. 16). On the home screen S3, icons Ia1, Ia2, Ia3, Ia4,... Ia8 for selecting menus are displayed in two upper and lower rows. One of the selected icons Ia1, Ia2, Ia3, Ia4,... Ia8 is highlighted (refer to the portion H in the figure). The highlight is traversed according to the rotation of the encoder dial 22. The operator can select the desired icon (any one of Ia1, Ia2, Ia3, Ia4... Ia8) by turning the encoder dial 22 and press the enter button 23 to determine.

  On the home screen S3, it is possible to select an icon (any one of Ia1, Ia2, Ia3, Ia4... Ia8) by pressing a command button (any one of 24, 25, 26, 27, and 28). Although not possible, it can be determined by pressing the command button 27. Further, when the command button 28 is pressed, the screen can return to the unlock screen S2. In addition, when the button Ba1 marked "Previous page" or the button Ba2 marked "Next page" is selected and determined, the screen is switched to another home screen S4. Icons that cannot be selected are grayed out (see part G in the figure).

  Here, the button Ba2 labeled “next page” is selected and determined.

  Next, another home screen S4 is displayed on the display 2 (see FIG. 17). On the home screen S4, icons Ib1, Ib2, Ib3, Ib4... Ib8 for selecting menus are displayed in two columns on the left and right. One of the selected icons Ib1, Ib2, Ib3, Ib4,... Ib8 is highlighted (see the H part in the figure). The highlight is traversed according to the rotation of the encoder dial 22. The operator can determine by selecting a desired icon (any one of Ib1, Ib2, Ib3, Ib4... Ib8) by turning the encoder dial 22, and pressing the enter button.

  On the home screen S4, it is possible to select an icon (any one of Ib1, Ib2, Ib3, Ib4, ... Ib8) by pressing a command button (any one of 24, 25, 26, 27, and 28). Although not possible, it can be determined by pressing the command button 27. Further, when the command button 28 is pressed, the screen can return to the unlock screen S2. In addition, when the button Bb1 marked “Previous page” or the button Bb2 marked “Next page” is selected and determined, the screen is switched to the home screen S3. Icons that cannot be selected are grayed out (not shown).

  Here, the icon Ib2 labeled “Laser” is selected and determined.

  A laser screen S5 is displayed on the display 2 (see FIG. 18). In the laser screen S5, a dialog box Db3 is displayed near the center. In the dialog box Db3, the value of the height position of the rotary 10 with respect to the reference plane H (the unit is millimeter (mm)) is written. The symbol “+” indicates that the height position of the rotary 10 is above the reference plane H, and the symbol “−” indicates that the height position of the rotary 10 is below the reference plane H. It shows that.

  In the laser screen S5, a dialog box Db4 is displayed. In the dialog box Db4, the notation "No receiver connected", "Lost laser light", "Laser control is paused" and "Laser control is OFF" depending on the situation Displayed.

  Further, the instruction image IP is displayed on the laser screen S5. The instruction image IP is lit or blinks according to a change in the height position of the rotary 10. The instruction image IP includes instruction parts Pa, Pb, and Pc. The instruction part Pa is a straight line part in the instruction image IP. The instruction part Pb is a downward arrow part in the instruction image IP. The instruction portion Pc is an upward arrow portion in the instruction image IP. The instruction units Pa, Pb, and Pc are turned on or blinked in a plurality of patterns. This will be described later.

  On the laser screen S5, two more icons Ic1 and Ic2 are displayed so as to be selectable. The icons Ic1 and Ic2 are highlighted so that it can be seen that they are selected. The highlight is traversed according to the rotation of the encoder dial 22. When the icon Ic1 marked “sensitivity setting” is selected and determined, a screen for setting the ON grade width Gw is displayed. When the icon Ic2 marked “offset position” is selected and determined, a screen for setting the offset position Os is displayed.

  In the following, a case where the icon Ic1 is selected and determined will be described.

  An ON grade width screen S6 is displayed on the display 2 (see FIG. 19). The ON grade width screen S6 is a screen for setting an allowable range.

  On the ON grade width screen S6, a slide bar P1, an indicator SP1, and a dialog box Db5 are displayed.

  From the lower end to the upper end of the slide bar P1, the range of light received by the laser receiver 65 (range in the vertical direction) is shown. The indicator SP1 indicates an allowable range with respect to the reference plane H from the lower end to the upper end. In the present application, such an allowable range is referred to as “ON grade width”. The ON grade width is Gw shown in FIG. On the other hand, the deviation amount of the allowable range, that is, the vertical deviation of the allowable range with respect to the reference plane H is referred to as “offset position”. The offset position is Os shown in FIG. The arrow B represents the reference plane H and points to the center of the slide bar P1.

  The operator scrolls and selects the value of the ON grade width by turning the encoder dial 22. When the encoder dial 22 is rotated clockwise, the value of the ON grade width increases, and when the encoder dial 22 is rotated counterclockwise, the value of the ON grade width decreases.

  On the ON grade width screen S6, the ON grade width can be set every ± 5 mm. The set value is displayed in the dialog box Db5. In this figure, “± 5 mm” is displayed, and the ON grade width has a range of ± 5 mm from the reference plane H. That is, the allowable range of the height position of the rotary 10 is 10 mm.

  In addition, at the bottom of the ON grade width screen S6, as the explanation about the value written in the dialog box Db5, “larger is insensitive, smaller is more sensitive”, “standard is ± 5 mm”, “adjustable from ± 1 to 20 mm” Is displayed.

  In the ON grade width screen S6, the indicator SP1 is enlarged or reduced as the ON grade width is increased or decreased. When the ON grade width increases, the upper limit of the indicator SP1 moves upward and the lower limit moves downward. On the contrary, when the value of the ON grade width decreases, the upper limit of the indicator SP1 moves downward and the lower limit moves upward.

  The operator can set the ON grade width by pressing the enter button 23 after confirming that the desired value is written in the dialog box Db5. The standard of the ON grade width is ± 5 mm. The ON grade width can be set in the range of ± 1 mm to ± 20 mm.

  In the ON grade width screen S6, the value of the ON grade width cannot be selected by pressing a command button (any one of 24, 25, 26, 27, and 28), but by pressing the command button 27, Can be determined. On the ON grade width screen S6, when the command button 28 is pressed, the screen can return to the laser screen S5.

  Next, a case where the icon Ic2 is selected and determined on the laser screen S5 will be described.

  An offset position screen S7 is displayed on the display 2 (see FIG. 20). The offset position screen S7 is a screen for setting the offset position value.

  On the offset position screen S7, a slide bar P2, an indicator SP2, and a dialog box Db6 are displayed.

  From the lower end to the upper end, the slide bar P2 indicates the range of light received by the laser receiver 65 (the range in the vertical direction). This is the same as the slide bar P1 in the ON grade width screen S6. The indicator SP2 indicates an allowable range with respect to the reference plane H from the lower end to the upper end. This is also the same as the indicator SP1 in the ON grade width screen S6. An arrow B represents the reference plane H and points to the center of the slide bar P2.

  In the figure, a two-dot chain line HO is shown as a line segment indicating the offset position. This two-dot chain line HO is located at the center of the indicator SP2 in the vertical direction.

  The operator scrolls and selects the offset position value by turning the encoder dial 22. When the encoder dial 22 is rotated clockwise, the value of the offset position is increased, and when the encoder dial 22 is rotated counterclockwise, the value of the offset position is decreased.

  In the offset position screen S7, the value of the offset position can be adjusted every ± 1 mm. The set value is displayed in the dialog box Db6. In this figure, “+5 mm” is displayed, and the center of the ON grade width is shifted from the reference plane H by “+5 mm”. That is, the deviation amount of the allowable range is +5 mm.

  Further, in the lower part of the offset position screen S7, notations such as “standard is 0 mm” and “adjustable from −50 to +50 mm” are displayed as explanations regarding values described in the dialog box Db6.

  In addition, on the offset position screen S7, the position of the indicator SP2 moves as the value of the offset position increases or decreases. When the value of the offset position increases, the indicator SP2 moves upward. On the contrary, when the value of the offset position decreases, the indicator SP2 moves downward.

  The operator can set the value of the offset position by pressing the enter button 23 after confirming that the desired value is written in the dialog box Db6. The standard offset position is ± 0 mm, and the offset position can be set in a range of −50 mm or more and +50 mm or less.

  On the offset position screen S7, the value of the offset position cannot be selected by pressing a command button (any one of 24, 25, 26, 27, and 28), but is determined by pressing the command button 27. I can. On the offset position screen S7, when the command button 28 is pressed, the screen can return to the laser screen S5.

  As described above, the instruction image IP including the instruction portions Pa, Pb, and Pc is displayed on the laser screen S5. When the indicator Pa is lit, the height position of the rotary 10 with respect to the reference surface H is in a state where it falls within the ON grade width. When the indicator Pb blinks, the height position of the rotary 10 protrudes upward from the ON grade width. When the instruction part Pc blinks, the height position of the rotary 10 protrudes downward from the range of the ON grade width.

  Such a laser leveler technique can be applied to a harrow, a leveler, a scraper and the like in addition to the rotary 10.

1 Tractor (work vehicle)
2 Display 3 Control device 10 Rotary (work machine)
B Arrow (mark indicating the reference plane)
Gw ON grade width (allowable range)
H Reference plane Os Offset position (tolerance deviation)
S5 Laser screen S6 ON grade width screen S7 Offset position screen SP1 Indicator (frame indicating the allowable range)
SP2 indicator (frame indicating the allowable range)

Claims (1)

In a work vehicle that can adjust the height position of the work machine using the laser beam emitted horizontally as a reference plane,
A display with an input setting device is provided in the vicinity of the driver's seat of the work vehicle,
On the display, a screen representing a state where the height position of the work machine is within an allowable range set with respect to the reference plane and a state outside the allowable range is displayed,
On the setting screen, on the setting screen, a slide bar indicating a width of an allowable range with respect to the reference plane and a deviation amount of the allowable range is displayed.
The allowable range width and the deviation amount can be set by the input setting device, respectively.
When increasing the width of the allowable range, the upper limit value moves upward and the lower limit value moves downward,
A work vehicle characterized in that when the width of the allowable range is reduced, the upper limit value moves downward and the lower limit value moves upward .