Display device and agricultural machine

Abstract

To provide a remote control operation device from which a position of a work part can be readily confirmed.SOLUTION: A remote control operation device is used for a mowing work machine including a work part capable of changing a position thereof. The remote control operation device includes a display part 111 for displaying confirmation displays 140, 170 for confirming a position of the work part. The confirmation displays 140, 170 include diagrams 151, 181 whose shape changes in accordance with changes of the position of the work part 6 and whose color changes when the work part reaches a prescribed position.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a display device and an agricultural machine. [Background technology]

[0002] BACKGROUND ART Conventionally, an agricultural work machine such as that described in Patent Document 1 below is known.

[0003] This conventional agricultural implement is a mowing machine that is connected to the rear of a vehicle such as a tractor, and is equipped with a position-adjustable working unit that moves forward as the vehicle moves and performs the specified task of mowing the grass. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-268685 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the above-mentioned conventional agricultural work machines, when an operator riding in a traveling vehicle wants to check the position of the working part, the operator needs to directly visually check the working part, which can be difficult to do.

[0006] Therefore, one object of the embodiments of the present invention is to provide a display device and an agricultural work machine that allow the position of the work unit to be easily confirmed. [Means for solving the problem]

[0007] A display device according to an embodiment of the present invention is a display device used in an agricultural machine equipped with a repositionable working unit, and is equipped with a display unit that displays a confirmation display for confirming the position of the working unit, and the confirmation display has a graphic that changes shape in response to changes in the position of the working unit.

[0008] In addition, a display device according to an embodiment of the present invention is a display device used in an agricultural machine equipped with a position-changeable working unit, and is equipped with a display unit that displays a confirmation display for confirming the position of the working unit, and the confirmation display has a graphic that changes shape in response to a change in the position of the working unit and changes color when the working unit reaches a predetermined position.

[0009] Furthermore, the agricultural work machine according to an embodiment of the present invention is an agricultural work machine that is used by being connected to a traveling vehicle, and is equipped with a working unit that can be moved to a different position, and the display device that has a display unit that displays a confirmation display for confirming the position of the working unit. [Effects of the Invention]

[0010] According to the embodiment of the present invention, the position of the working unit can be easily confirmed. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a side view of a brush cutter according to an embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 2 is a block diagram of a control system for the same brush cutter. [Figure 6] FIG. 2 is a front view of the remote control device of the same brush cutting machine. [Figure 7] 3 is a diagram showing a screen displayed on a display unit of the remote control operation device. FIG. [Figure 8] 10 is an explanatory diagram of the case where a manual offset button of the remote control operation device is operated. FIG. [Figure 9] 10 is an explanatory diagram of the case where the manual storage button of the remote control operation device is operated. FIG. [Figure 10] 10 is an explanatory diagram of the case where the manual upward rotation button of the remote control operation device is operated. FIG. [Figure 11] 10 is an explanatory diagram of the case where the manual downward rotation button of the remote control operation device is operated. FIG. [Figure 12] 10 is an explanatory diagram of the case where the automatic offset button of the remote control operation device is operated. FIG. [Figure 13] 10 is an explanatory diagram of the case where the automatic storage button of the remote control operation device is operated. FIG. [Figure 14] 10 is an explanatory diagram of the case where the automatic level button of the remote control operation device is operated. FIG. [Figure 15] 10 is an explanatory diagram of the case where the automatic driving button (automatic driving posture button) of the remote control operation device is operated. FIG. [Figure 16] FIG. 10 is a plan view of a ridge coating machine according to another embodiment of the present invention. [Figure 17] FIG. 2 is a front view of the remote control operating device of the same furrow coating machine. [Figure 18] 3 is a diagram showing a screen displayed on a display unit of the remote control operation device. FIG. [Figure 19] FIG. 10 is a schematic plan view of a tiller according to yet another embodiment of the present invention. [Figure 20] FIG. 2 is a front view of the remote control operating device of the same tiller. [Figure 21] 3 is a diagram showing a screen displayed on a display unit of the remote control operation device. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] An embodiment of the present invention will be described with reference to FIGS.

[0013] In the drawing, reference numeral 1 denotes a grass cutting machine, which is an agricultural work machine, and this grass cutting machine 1 is a flail mower that is connected (mounted) to the rear of a tractor 2, which is a traveling vehicle.

[0014] That is, the mowing machine 1 is detachably connected to the rear of the tractor 2, and moves forward (in the direction of travel) as the tractor 2 travels, while performing predetermined work, i.e., mowing work (agricultural work).

[0015] More specifically, the grass cutting implement 1 is connected to a three-point linkage (agricultural implement lifting device) at the rear of the tractor 2, and moves forward as the tractor 2 travels forward, cutting and shredding the grass to be cut (for example, weeds, straw, second ears of wheat, green manure, etc.). The grass cutting implement 1 is an offset implement that can be offset to the side of the tractor 2, i.e., to the right, for example.

[0016] As shown in Figures 1 to 5, the brush cutting machine 1 comprises an attachment section 5 that is detachably connected (attached) to the three-point link section at the rear of the tractor 2, a working section (brush cutting working section) 6 that can be changed between a stored state and an offset state (position can be changed left and right) and can be changed between a horizontal position and an inclined position (position can be changed up and down), and that mainly performs brush cutting work in a desired offset state (for example, a maximum offset state where it is positioned at the maximum offset position), and a connecting section (offset mechanism section) 7 that connects the front and rear attachment sections 5 and the working section 6.

[0017] The grass cutting machine 1 also includes a remote control operation device (a display device for agricultural machines) 8 that allows a worker (operator) on the tractor 2 to remotely operate the working unit 6, a drive unit 12 that moves the working unit 6 to change its position (state, attitude), a first detection unit 13 that detects the offset amount (amount of movement in the left-right direction) of the working unit 6 relative to the tractor 2, a second detection unit 14 that detects the attitude angle (amount of rotation in the up-down direction) of the working unit 6 relative to the tractor 2, and a control unit (control box) 15 that controls the drive unit 12 based on information (signals) from the first detection unit 13, the second detection unit 14 and the remote control operation device 8. Additionally, the grass cutting machine 1 includes a sound generation unit 10 that, under the control of the control unit 15, generates a sound (warning sound, etc.) to alert people around the working unit 6 that the position of the working unit 6 is being changed.

[0018] The drive unit 12 has a first cylinder (offset cylinder) 16, which is an extendable and retractable first drive means for offsetting the working unit 6 to move left and right relative to the mounting unit 5, and a second cylinder (tilt cylinder) 17, which is an extendable and retractable second drive means for changing the posture of the working unit 6 to rotate up and down about a rotation center axis (rotation fulcrum) 11 in the front-to-rear direction relative to the connecting unit 7. The cylinders 16 and 17 are, for example, electric hydraulic cylinders. The detection units (sensors) 13 and 14 are, for example, potentiometers. The sound generation unit 10 is, for example, a buzzer.

[0019] Furthermore, the mowing machine 1 is equipped with a power transmission unit 18 that transmits power from the tractor 2, and the working unit 6 performs the mowing work based on the power from this power transmission unit 18. That is, for example, the working body 51 of the working unit 6 performs the mowing work while rotating in a predetermined up-cut direction (the direction of the arrow shown in FIG. 1) based on the power from the power transmission unit 18.

[0020] Here, the working unit 6 is capable of mowing not only in the offset state, but also in a stored state where it is stored in the rear of the tractor 2. The stored state is a state where the working unit 6 is located in a stored position at the rear of the tractor 2 (a position where substantially the entire working unit 6 is stored within the width of the tractor 2). The offset state is a state where the working unit 6 is located in an offset position that is shifted to the right from the stored position at the rear of the tractor 2 by a desired offset amount (movement amount).

[0021] The working unit 6 can move left and right relative to the tractor 2 (mounting unit) between the storage position and the maximum offset position by extending and retracting the first cylinder 16, and can be positioned at either of these positions or at any position between them.

[0022] In addition, the working unit 6 can perform grass cutting work in either a horizontal position along the horizontal left-right direction or an upward or downward inclined position (an upward inclined position with the left low and the right high, or a downward inclined position with the left high and the right low).

[0023] The working unit 6 can be rotated up and down around the longitudinal pivot axis 11 relative to the tractor 2 (mounting unit) by extending and retracting the second cylinder 17 between the maximum upward tilt position (the highest position where the right end of the working unit is located) and the maximum downward tilt position (the lowest position where the right end of the working unit is located), and can be positioned at either of these positions and any position between them (including a horizontal position corresponding to a horizontal posture).

[0024] In addition, an operator sitting in the driver's seat of the tractor 2 can rotate the working unit 6 vertically around the rotation center axis 11 between the maximum upward tilt position and the maximum downward tilt position (including the horizontal position) by operating the remote control operating device 8 to extend and retract the second cylinder 17, regardless of whether the tractor is in the stored state or the offset state (see Figures 10 and 11).

[0025] The maximum inclination angle α upward from the horizontal direction shown in Figure 10(c) is, for example, 70°, and the maximum inclination angle β downward from the horizontal direction shown in Figure 11(c) is, for example, 55°, but these inclination angles α and β are not limited to the angles shown in the figures and may be other angles, for example, both may be the same angle.

[0026] The mounting unit 5 has a hitch frame 21, which is a mounting frame, and this hitch frame 21 is provided with a three-point connection unit 22 that is detachably connected to a three-point link unit at the rear of the tractor 2. The three-point connection unit 22 has a top mast 24 that holds a top pin 23, and a pair of left and right lower arms 26 that hold lower pins 25.

[0027] The hitch frame 21 is also provided with an input shaft holder 29 that rotatably holds an input shaft 28 that receives power from the tractor 2. The input shaft 28 is connected to the PTO shaft of the tractor 2 via a joint, and inputs power from the PTO shaft to the brush cutter 1. Furthermore, an arm attachment portion 30 is provided on the right side of the hitch frame 21.

[0028] The connecting portion 7 has two pivoting arms (parallel links) 41 whose front ends are rotatably attached to the arm mounting portion 30 via axes 46, and the rear ends of each connecting arm 41 are rotatably attached to the arm mounting member 42 via axes 47.

[0029] Furthermore, a rotation central axis (rotation fulcrum) 11 in the front-to-rear direction is fixed to the arm attachment member (fulcrum frame) 42, and this rotation central axis 11 is held by a bearing member 31 of the working unit 6, and this bearing member 31 is rotatable about the rotation central axis 11. In other words, the working unit 6 is rotatable in the up-and-down direction about the round rotation central axis (central axis portion) 11 fixed to the arm attachment member (arm attachment portion) 42 of the connecting unit 7.

[0030] The second detector 14 detects the rotation angle of the bearing member 31 relative to the rotation center axis 11 of the connecting part 7, in other words, the vertical rotation angle of the working part 6 relative to the mounting part 5, and transmits this information to the control part 15. The first detector 13 detects the horizontal rotation angle of the connecting arm 41 relative to the mounting part 5, and transmits this information to the control part 15.

[0031] 4, the bearing member 31 is attached to a bearing mount 35 of the working unit 6 by means of attachment means 34, for example, consisting of a bolt 32 and a nut 33. The bearing member 31 has a cylindrical bearing sleeve portion 36, into which the pivot shaft 11 is inserted, and a plate 37 is attached to the rear end of the pivot shaft 11 by a bolt 38, and the plate 37 has a pin 39.

[0032] The pin 39 is inserted into a hole 14b in a lever 14a of a potentiometer, which is the second detection unit 14. A support base 40 that supports the potentiometer, which is the second detection unit 14, is attached to a bearing mount 35 with bolts 20. The bearing mount 35 is fixed to the top surface of a cover body 75 of the working unit 6.

[0033] The arm mounting member 42 also has a cylinder mounting portion 43, and the tip end of the rod 17a of the second cylinder 17 is rotatably mounted to this cylinder mounting portion 43 via a headed pin 44 welded to a plate 66 that is bolted to the cylinder mounting portion 43. The base end of the cylinder body 17b of the second cylinder 17 is rotatably mounted to a cylinder mounting base 48 via a headed pin 45 welded to a plate 67 that is bolted to the cylinder mounting base 48. The cylinder mounting base 48 is bolted to the top surface of a cover body 75 of the working unit 6.

[0034] The rotation center shaft 11, bearing member 31, bearing mount 35, plate 37, support base 40, second detection unit 14, etc. constitute a rotation center portion 19 (the peripheral portion including the rotation center shaft).

[0035] The working unit 6 has a working body (grass-cutting working body) 51, which is a working means that performs grass-cutting work (the work of cutting and shredding grass growing on the work surface) while rotating in a predetermined up-cut direction (the direction of the arrow shown in Figure 1) based on power from the power transmission unit 18 that transmits power from the tractor 2 side, a cover means 52 that covers this working body 51, a gauge roller 50 which is a ground contact wheel arranged behind the working body 51, and a scraper 49 that removes deposits (soil, etc.) that have adhered to this gauge roller 50.

[0036] The working unit 6 also has a pulley case 53, which is a first transmission case body that houses a plurality of pulleys 56, 57, 58 and a belt 59, etc., and a gear case (transmission case) 54, which is a second transmission case body that houses a plurality of gears (not shown), etc.

[0037] The belt 59 in the pulley case 53 is wound around a drive pulley 56, a driven pulley 57, and a tension pulley 58, and the tension pulley 58 is biased by a tension spring 60, which serves as a biasing body. The biasing force of the tension spring 60 can be adjusted by a tension bolt 55.

[0038] An intermediate input shaft 61 is rotatably held by the gear case 54, and a power transmission means 62 that transmits power from the input shaft 28 is connected to the intermediate input shaft 61. The power input to the intermediate input shaft 61 from the power transmission means 62 is then transmitted to the working body 51, and as a result, the working body 51 is driven to rotate in a predetermined direction, that is, an up-cut direction, to perform grass cutting work.

[0039] The working body 51 has a rotating shaft 71 that is elongated in the left-right direction, and a plurality of working claws, or grass-cutting claws 74, that are detachably attached to a claw mounting portion 72 of the rotating shaft 71 via mounting members 73 and rotate in an up-cut direction to perform grass-cutting work.

[0040] The cover means 52 has a cover body 75 that is elongated in the left-right direction and is approximately plate-shaped, covering the upper side of the working body 51, and left and right cover side plates 76 that cover the lateral sides of the working body 51, and the rotation shaft 71 of the working body 51 is rotatably supported by these two cover side plates 76.

[0041] Furthermore, a lower side plate 77 is detachably provided at the bottom of each of the left and right cover side plates 76. A pulley case 53 is fixed to the outer surface of the left cover side plate 76. An elastic plate 78 and a cylinder cover member 79 are provided at the front end of the cover body 75.

[0042] On the other hand, the brush cutting machine 1 is equipped with a confirmation means 81 that allows an operator riding on the tractor 2 to directly visually confirm the posture of the working part 6 (the posture angle relative to the horizontal direction perpendicular to the direction of travel) from the tractor 2 side.

[0043] The confirmation means 81 has a cover function that covers the upper side (upper part) of the rotation central axis 11, which is the rotation center of the working unit 6, and is arranged in the vicinity of the rotation central axis 11 so as to cover the upper side of the rotation central axis 11. In other words, the confirmation means 81 is arranged in the vicinity of the rotation central part 19 that includes the rotation central axis 11, and also has a cover function that covers the rotation central part 19.

[0044] Specifically, the confirmation means 81 has a rear cover member 83 which is a first member (rotating member) that rotates around the rotation center axis 11 together with the working unit 6 when the working unit 6 rotates based on the expansion and contraction of the second cylinder 17, and a front cover member 84 which is a second member (non-rotating member) that does not rotate when the working unit 6 rotates based on the expansion and contraction of the second cylinder 17.

[0045] The rear cover member (bearing cover) 83 is attached to the bearing mounting base 35 of the working unit 6 with a screw 85, which is an attachment tool, and the front cover member (fulcrum cover) 84 is attached to the arm mounting member 42 of the connecting unit 7 with a screw 86, which is an attachment tool. These front and rear cover members 83, 84 are arranged close to each other and facing each other, with a small gap 87 between the two cover members 83, 84.

[0046] The front cover member 84 has a cover plate portion 91 that is a substantially arc-shaped plate centered on the rotation central shaft 11, and a concave surface 92 that is recessed downward is formed on the upper surface of this cover plate portion 91. A reference mark (indicator mark) 93 that can be seen by an operator riding on the tractor 2 is provided in the center of the concave surface 92.

[0047] The reference mark 93 is a sticker (a sheet-like member with an adhesive surface on the back) formed in a triangular shape, such as an isosceles triangle with its apex pointing backward (or an arrow shape, for example). The sticker can be attached to a concave surface using the adhesive surface on the back, so the attachment position can be finely adjusted.

[0048] Furthermore, a plurality of screw holes 95 are formed in the front cover member 84, and screws 86 are threaded through the screw holes 95 into female threaded portions 96 of the arm attachment member 42. The front cover member 84 has a substantially semicircular front plate portion 97, and this front plate portion 97 has cutout portions 98 formed therein for wiring.

[0049] The rear cover member 83 has a cover plate portion 101 that is substantially arc-shaped and centered on the central axis of rotation 11, and a substantially semicircular arc-shaped surface (inclined surface) 102 that is centered on the central axis of rotation 11 and slopes downward toward the front is formed on the front end side of the upper surface of this cover plate portion 101. The arc-shaped surface 102 is provided with a plurality of marks (indicated marks that are scales for measuring posture angles) 103 to 107 that are visible to the operator riding on the tractor 2, for example, 14 marks that are aligned at intervals in the arc direction (longitudinal direction) of the arc-shaped surface 102.

[0050] That is, one marker 103 for the horizontal position, one marker 104 for the maximum upward tilt position, one marker 105 for the maximum downward tilt position, six intermediate markers 106 for the upward tilt position, and five intermediate markers 107 for the downward tilt position are arranged side by side on the arc-shaped surface 102 of the rear cover member 83.

[0051] Here, when the working unit 6 is in a horizontal position, the horizontal posture mark 103 is located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in a horizontal position.

[0052] The mark 104 for the maximum upward tilt posture is located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in the maximum upward tilt posture in which it is positioned at the maximum upward tilt position (highest raised position).

[0053] The mark 105 for the maximum downward tilt posture is located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in the maximum downward tilt posture in which it is positioned at the maximum downward tilt position (lowest position).

[0054] The intermediate marks 106 for the upward tilt position are provided at equal intervals (for example, 10° intervals) on the arc-shaped surface 102 in the portion between the mark 103 for the horizontal position and the mark 104 for the maximum upward tilt position, and are located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in an intermediate upward tilt position at an intermediate position (for example, 10°, 20°, etc.) between the horizontal position and the maximum upward tilt position.

[0055] The intermediate marks 107 for the downward tilt position are provided at equal intervals (for example, 10° intervals) on the arc-shaped surface 102 in the portion between the mark 103 for the horizontal position and the mark 105 for the maximum downward tilt position, and are located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in an intermediate downward tilt position at an intermediate position (for example, 10°, 20°, etc.) between the horizontal position and the maximum downward tilt position.

[0056] Each of the plurality of marks 103 to 107 is made up of a sticker (a sheet-like member having an adhesive surface on the back side) formed in, for example, an elongated, approximately elliptical shape (it may also be, for example, a perfect circle or a rectangle), and each of these stickers can be attached to the arc-shaped surface 102 using the adhesive surface on the back side, so that the attachment position can be finely adjusted. Note that the marks 103 to 107 do not have to be made up of individual stickers, and for example, the marks 103 to 107 may be displayed by printing or the like on the surface of a single strip-shaped sticker (a sheet-like member having an adhesive surface on the back side) that can be attached along the arc-shaped surface 102.

[0057] A plurality of screw holes 109 are formed in the rear cover member 83, and the screws 85 are threaded through the screw holes 109 into the female threads 110 of the bearing mount 35.

[0058] 6 is a front view of a remote control operation device 8, which is a display device for the mower, used in the mower 1. This remote control operation device 8 is arranged, for example, near the driver's seat of the tractor 2, and is capable of wireless (or wired) communication with a control unit 15 of the mower 1 (which may be the control unit of the tractor 2).

[0059] As shown in Figure 6, the remote control operation device 8 has a display unit 111 that displays predetermined information based on information (signals) from the control unit 15, and an operation unit 112 that is pressed and operated by a worker (operator) sitting in the driver's seat of the tractor 2.

[0060] The display unit 111 is, for example, a liquid crystal color display provided at the top of the front side of the device body 113. The operation unit 112 is, for example, made up of a plurality of push buttons (switches) provided in a distributed manner on the front side of the device body 113.

[0061] Here, the operation unit 112 has a power button 116 , a decision button 117 , a display switching button (screen switching button) 118 , a mode switching button 119 , and a setting button 120 .

[0062] The display switching button 118 is a button for switching to one of an offset confirmation screen (for example, the screen shown in FIG. 7(a)) for checking (displaying) the left-right position (offset amount) of the working unit 6 and an attitude angle confirmation screen (for example, the screen shown in FIG. 7(b)) for checking (displaying) the up-down position (attitude angle) of the working unit 6.

[0063] The mode switching button 119 is a button for switching to either a manual mode or an automatic mode. The setting button 120 is a button for switching to a setting mode for performing various settings, and for example, in the setting mode, it may be possible to set in advance the attitude angle (traveling position) of the working unit 6 in the stored state when an automatic travel button 129 (described later) is operated (when traveling on public roads).

[0064] The operation unit 112 also has a manual offset button (manual right movement button) 121, a manual storage button (manual left movement button) 122, a manual upward rotation button 123, and a manual downward rotation button .

[0065] The manual offset button 121 is a button for moving the working unit 6 to the right (offset operation) in manual mode. The manual storage button 122 is a button for moving the working unit 6 to the left (storage operation) in manual mode. The manual rotate up button 123 is a button for rotating the working unit 6 upward in manual mode. The manual rotate down button 124 is a button for rotating the working unit 6 downward in manual mode.

[0066] The working unit 6 operates and its current position changes only while the manual buttons 121-124 are pressed by the operator. Therefore, for example, to change the position of the working unit 6 from the retracted position to the maximum offset position in manual mode, the operator must press and hold the manual offset button 121, and the same applies to the other buttons 122-124. On the other hand, for example, in automatic mode, pressing the manual buttons 121-124 allows fine adjustment of the position of the working unit 6. That is, for example, after the working unit 6 has automatically moved to the maximum offset position, pressing the manual retraction button 122 can shift the position of the working unit 6 slightly to the left.

[0067] Furthermore, the operation unit 112 has an automatic offset button (automatic right movement button) 126, an automatic storage button (automatic left movement button) 127, an automatic level button 128, and an automatic travel button 129.

[0068] The automatic offset button 126 is a button for moving the working unit 6 to the right to the maximum offset position (offset operation) in automatic mode. The automatic storage button 127 is a button for moving the working unit 6 to the left to the storage position (storage operation) in automatic mode. The automatic level button 128 is a button for rotating the working unit 6 to a horizontal position in automatic mode. The automatic travel button 129 is a button for changing the position of the working unit 6 to a travel position (a preset position suitable for travel on public roads) in automatic mode.

[0069] A single push of these automatic buttons 126-129 by the worker automatically moves working unit 6 to a predetermined position, changing its current position. In other words, with a single push of a button by the worker, control unit 15 controls drive unit 12 based on detection information from detection units 13 and 14, causing working unit 6 to automatically perform a predetermined operation (change of position). Therefore, unlike manual buttons 121-124, the worker does not need to hold down automatic buttons 126-129.

[0070] 7A and 7B are diagrams showing screens (screen displays) displayed on the display unit 111 of the remote control operating device 8. The screen shown in Fig. 7A is a confirmation screen (first confirmation screen) for displaying an offset amount to confirm the left-right position of the working unit 6, and the screen shown in Fig. 7B is a confirmation screen (another confirmation screen different from the first confirmation screen) for displaying an attitude angle to confirm the up-down position of the working unit 6.

[0071] The screen shown in FIG. 7(a) has a first display portion 131 that displays a mode display 135, a radio wave status display 136, and a remaining battery level display 137, a second display portion 132 that displays a movement-related display 138 related to the left-right movement of the working unit 6, and a third display portion 133 that displays a confirmation display 140 for checking the current left-right position of the working unit 6 (position in the left-right direction).

[0072] The background colors of the first display portion 131 and the second display portion 132 are, for example, white, and the background color of the third display portion 133 is, for example, black. Note that these colors are merely examples, and other colors may also be used (the same applies in the following description).

[0073] The mode display 135 has characters (e.g., black characters such as "NORMAL", "AUTO", etc.) 141 indicating the current mode and a quadrangular figure 142 with a certain shape. The quadrangular figure 142 is displayed, for example, in blue in the case of the manual mode and in red in the case of the automatic mode.

[0074] The movement-related display (operation-related display) 138 has characters (e.g., black characters such as "SLIDE", "TAKE OUT", "INSERT", "RUN", etc.) 143 indicating the current operation of the working unit 6, the character "OUT" 144 indicating the movement direction of the working unit 6 and a triangular figure 145 with a certain shape located immediately beside it, and the character "IN" 146 indicating the movement direction of the working unit 6 and a triangular figure 147 with a certain shape located immediately beside it.

[0075] The character "OUT" 144 and the triangular figure (this figure alone may also be used) 145 are displayed, for example, in gray when the working unit 6 cannot move to the right side (when it is located at the maximum offset position), and in black (a color more prominent than the color when movement is impossible, for example, a darker color, etc. is preferable) when the working unit 6 can move to the right side.

[0076] The character "IN" 146 and the triangular figure (this figure alone may also be used) 147 are displayed, for example, in gray when the working unit 6 cannot move to the left side (when it is located at the storage position), and in black (a color more prominent than the color when movement is impossible, for example, a darker color, etc. is preferable) when the working unit 6 can move to the left side.

[0077] The confirmation display (confirmation display for checking left-right position) 140 has a figure 151 whose shape changes in response to a change in position due to left-right movement of the working unit 6 (a change in the left-right position of the working unit 6 based on the extension and contraction of the first cylinder 16), and a scale 152 whose shape does not change in response to a change in the position of the working unit 6.

[0078] Figure 151 consists of an area that is entirely filled with a predetermined display color (for example, a single color such as blue or green), and is a rectangular shape-changing figure that gradually changes shape to correspond to the current position of the working unit 6 (the actual current state of the working unit) simultaneously (including approximately simultaneously; the same applies below) with the left-right movement of the working unit 6 (change in left-right position).

[0079] More specifically, graphic 151 for confirming left-right position has a fixed side 155 located near the left end of third display portion 133, a movable side 156 that moves left and right on the screen simultaneously with the left-right movement of working unit 6 so as to approach and move away from fixed side 155, an upper elastic side 157 connecting the upper ends of fixed side 155 and movable side 156, and a lower elastic side 158 connecting the lower ends of fixed side 155 and movable side 156. Therefore, graphic 151 is made up of an area surrounded by these four sides 155 to 158, and graphic 151 changes not only its shape but also its overall color.

[0080] 7(a), the figure 151 in its most expanded state, i.e., when its area is at its maximum, is a horizontally long strip-like rectangle having approximately the same size as the third display portion 133. Also, the figure 151 in its most contracted state, i.e., when its area is at its minimum, is a vertically long bar-like rectangle, and the moving side 156, which is the right side of this vertically long bar-like figure 151, starts moving simultaneously with the start of movement of the working unit 6 in the stored state (this includes cases where there is a time lag and the moving side starts moving with a slight delay, etc.).

[0081] As will be described later, the graphic 151 is displayed in different ways when the working unit 6 is located at a predetermined position and when it is located at a position other than the predetermined position.

[0082] The scale 152 also has a plurality of scale lines 160 arranged at equal intervals in the left-right direction below the third display portion 133. In other words, the scale 152 is made up of a plurality of linear scale lines 160 of a predetermined width positioned along the up-down direction. Each scale line 160 is displayed in white, for example, so as to overlap the figure 151.

[0083] The screen shown in FIG. 7(b) has a first display portion 161 that displays a mode display 165, a radio wave status display 166, and a remaining battery level display 167, a second display portion 162 that displays a rotation-related display 168 related to the up-and-down rotation of the working unit 6, and a third display portion 163 that displays a confirmation display 170 for checking the current up-and-down position of the working unit 6 (position in the up-and-down direction).

[0084] The background color of the first display portion 161 and the second display portion 162 is, for example, white, and the background color of the third display portion 163 is, for example, black.

[0085] The mode display 165 has characters 171 indicating the current mode (for example, black characters such as "NORMAL" or "AUTO") and a fixed rectangular graphic 172. The rectangular graphic 172 is displayed in blue, for example, in the manual mode, and in red, for example, in the automatic mode.

[0086] The rotation-related display (operation-related display) 168 has characters (for example, black characters such as "tilt," "level," or "run") 173 indicating the current operation of the working unit 6, the character "up" 174 indicating the rotation direction of the working unit 6 and a triangular figure 175 of a fixed shape located immediately next to it, and the character "down" 176 indicating the rotation direction of the working unit 6 and a triangular figure 177 of a fixed shape located immediately next to it.

[0087] The character "up" 174 and the triangular figure (or just this figure) 175 are displayed, for example, in gray when the working part 6 cannot be rotated upward (when it is in the maximum upward tilt position), and are displayed, for example, in black (a color that is more noticeable than the color when the working part 6 cannot be rotated, such as a dark color, is preferable) when the working part 6 can be rotated downward.

[0088] Furthermore, the character "down" 176 and the triangular figure (or just this figure) 177 are displayed, for example, in gray when the working unit 6 cannot be rotated downward (when it is in the maximum downward tilt position), and are displayed, for example, in black (a color that is more noticeable than the color when the working unit 6 cannot be rotated, such as a dark color, is preferable) when the working unit 6 can be rotated downward.

[0089] The confirmation display (confirmation display for checking the vertical position) 170 has a figure 181 whose shape changes in response to a change in position due to the vertical rotation of the working unit 6 (a change in the vertical position of the working unit 6 based on the extension and contraction of the second cylinder 17), a scale 182 whose shape does not change in response to a change in the position of the working unit 6, and a marker portion 183 whose shape does not change in response to a change in the position of the working unit 6.

[0090] The figure 181 is made up of an area that is entirely filled with a predetermined display color (for example, a single color such as blue or green), and is a shape-changing figure that is mainly a rectangle (it may become a triangle depending on the tilt angle of the working unit 6) whose shape gradually changes to correspond to the current position of the working unit 6 (the actual current state of the working unit) as the working unit 6 rotates up and down (changes in up and down position).

[0091] More specifically, the graphic 181 for confirming the vertical position has a rotation side 184 that rotates around a rotation center point P on the screen at the same time as the working unit 6 rotates in the vertical direction.

[0092] Therefore, this figure 181 consists of an area of ​​the third display portion 163 located below the horizontal rotation edge 184 when the working unit 6 is in a horizontal position, an area of ​​the third display portion 163 located to the right of the left-low, right-high inclined rotation edge 184 when the working unit 6 is in an upward inclined position, and an area of ​​the third display portion 163 located to the left of the left-high, right-low inclined rotation edge 184 when the working unit 6 is in a downward inclined position, and the figure 181 changes in shape as well as its overall color.

[0093] 7(b), a rectangular figure 181 in the shape of a horizontal strip, indicated by a solid line, corresponds to the working unit 6 in the horizontal position. Therefore, a rotation side 184, which is the upper side of this rectangular figure 181, coincides with and overlaps with the horizontal position marker line 186, and therefore starts to rotate simultaneously with the start of rotation of the working unit 6 in the horizontal position, although it is not displayed in this state (this includes cases where a time lag occurs and the rotation side starts to rotate slightly later).

[0094] As will be described later, the graphic 181 is displayed in different ways when the working unit 6 is located at a predetermined position and when it is located at a position other than the predetermined position.

[0095] The marker portion 183 also has a marker line 186 for a horizontal position that coincides with the horizontal rotation edge 184 when the working unit 6 is in a horizontal position where it is in a horizontal position, a marker line 187 for a maximum upward tilt position that coincides with the left-low, right-high inclined rotation edge 184 when the working unit 6 is in a maximum upward tilt position where it is in a maximum upward tilt position, and a marker line 188 for a maximum downward tilt position that coincides with the left-high, right-low inclined rotation edge 184 when the working unit 6 is in a maximum downward tilt position where it is in a maximum downward tilt position.

[0096] The intersection of these three mark lines 186 to 188 is the rotation center point P, and when the working unit 6 rotates, the length of the rotation side 184 changes as it rotates around the rotation center point P. Furthermore, the three straight mark lines 186 to 188 that make up the mark unit 183 are not limited to the continuous lines shown in the figure, and may be, for example, dotted lines.

[0097] The marker line 186 for the horizontal position is a thin line of a predetermined width that is positioned along the horizontal direction, i.e., the left-right direction, and extends from the left end to the right end of the third display portion 163. The marker line 187 for the maximum upward tilt position is a thin line of a predetermined width that is positioned along the tilt direction of left-low and right-high, and extends from the rotation center point P to the upper end of the third display portion 163. The marker line 188 for the maximum downward tilt position is a thin line of a predetermined width that is positioned along the tilt direction of left-high and right-low, and extends from the rotation center point P to the lower end of the third display portion 163. Each of the marker lines 186 to 188 is displayed in white, for example, so as to overlap the figure 181.

[0098] Furthermore, the scale 182 has a plurality of upper scale lines 189 arranged at equal intervals on an imaginary circle K centered on the rotation center point P in a portion of the right part of the third display portion 163 located between the horizontal position marker line 186 and the maximum upward tilt position marker line 187, and a plurality of lower scale lines 190 arranged at equal intervals on an imaginary circle K centered on the rotation center point P in a portion of the right part of the third display portion 163 located between the horizontal position marker line 186 and the maximum downward tilt position marker line 188.

[0099] That is, the scale 182 is made up of a plurality of linear scale lines 189, 190 of a predetermined width positioned along the radial direction of an imaginary circle K whose center is the rotation center point P (approximately the center of the third display portion 163). Each of the scale lines 189, 190 is displayed in white, for example, so as to overlap the figure 181.

[0100] In short, as shown in FIG. 7(b), these multiple (e.g., eight) scale lines 189, 190 are displayed in white, spaced apart and aligned in the circumferential direction of an imaginary circle K centered on the rotation center point P, when viewed from the front of the screen.

[0101] In the example shown in Figure 7(b), the angle θ1 formed by the two marking lines 186, 187 is not the same as the maximum upward inclination angle α (e.g., 70°) of the working unit 6, and the angle θ2 (θ1 = θ2) formed by the two marking lines 186, 188 is not the same as the maximum downward inclination angle β (e.g., 55°) of the working unit 6, but they may be made to correspond to the actual maximum inclination angle of the working unit 6, for example, by making θ1 = α and θ2 = β.

[0102] 7(b), the multiple scale lines 189, 190 aligned on the imaginary circle K are evenly spaced and therefore do not correspond to the actual tilt angle of the working unit 6. However, they may be spaced at 10° intervals, for example, to correspond to the actual tilt angle of the working unit 6. In this case, for example, an angle display indicating the current tilt angle of the working unit 6 (e.g., "+10°," "-10°," etc.) may be added near the corresponding scale line 189, 190. Furthermore, for example, an angle display indicating the current tilt angle of the working unit 6 (e.g., a numerical value within the range of "-55° to +70°") may be displayed in the third display portion 163.

[0103] Next, a case where an operator operates a predetermined button on the remote control operation device 8 will be described with reference to Figures 8 to 15. In each of Figures 8 to 15, the upper part shows the state of the brush cutting machine 1, and the lower part shows the display screen of the display unit 111.

[0104] FIG. 8 is an explanatory diagram of the case where the manual offset button 121 of the remote control operation device 8 is operated.

[0105] The mowing machine 1 shown in FIG. 8( a ) is in a state where the working unit 6 is in a horizontal position and located at the storage position behind the tractor 2 .

[0106] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG. 8(a).

[0107] That is, for example, as shown in the figure, in the first display portion 131, the word "NORMAL" 141 is displayed lit in black, and a square graphic 142 is displayed lit in blue.

[0108] In addition, in the second display portion 132, the character 143 for "slide" is displayed lit in black, the character 144 for "exit" and a triangular figure 145 are displayed lit in black, and the character 146 for "enter" and a triangular figure 147 are displayed lit in gray.

[0109] Furthermore, in the third display portion 133, the most contracted figure 151 is displayed lit in blue, and the scale 152 is displayed lit in white.

[0110] When the operator on the tractor 2 presses and holds the manual offset button 121, the working unit 6, which is in a horizontal position, first moves to the right as shown in Figure 8(b), and the sound generating unit 10 generates a sound (for example, a warning sound such as "beep, beep, beep").

[0111] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG. 8(b).

[0112] That is, for example, as shown in the figure, in the first display portion 131, the word "NORMAL" 141 is displayed lit in black, and a square graphic 142 is displayed lit in blue.

[0113] In addition, in the second display portion 132, the character 143 for "slide" is displayed lit in black, the character 144 for "exit" and a triangular figure 145 are displayed lit in black, and the character 146 for "enter" and a triangular figure 147 are also displayed lit in black.

[0114] Furthermore, in the third display portion 133, a figure 151 that has changed shape in response to the movement of the working unit 6 and is stretched is displayed lit in blue, and a scale 152 is displayed lit in white.

[0115] That is, the figure 151 displayed on the third display portion 133 has an area that increases corresponding to the movement amount of the working unit 6 as the moving side 156 moves rightward in accordance with the movement of the working unit 6. When the long-press operation of the manual offset button 121 is canceled midway, the movement of the working unit 6 and the shape change of the figure 151 stop at that midway position, and the sound generation unit 10 stops generating sound.

[0116] Subsequently, as shown in FIG. 8(c), when the working unit 6 in the horizontal posture moves rightward to the maximum offset position (the movable limit position which is the optimal position for mowing work), the sound generation unit 10 stops generating sound.

[0117] At this time, a screen as shown in FIG. 8(c) is displayed on the display portion 111 of the remote control operation device 8.

[0118] That is, for example, as shown in the drawing, on the first display portion 131, the character 141 of "NORMAL" is lit and displayed in black, and the square figure 142 is lit and displayed in blue.

[0119] Also, on the second display portion 132, the character 143 of "SLIDE" is lit and displayed in black, the characters 144 of "OUT" and the triangular figure 145 are lit and displayed in gray, and the characters 146 of "IN" and the triangular figure 147 are lit and displayed in black.

[0120] Furthermore, on the third display portion 133, the figure 151 in the most extended state with its shape changing according to the movement of the working unit 6 is blinking and displayed in green, and the scale 152 is lit and displayed in white. Note that the gray characters 144 of "OUT" and the triangular figure 145 may blink and display together with the figure 151, or the entire third display portion 133 may blink and display.

[0121] Then, when the worker on the tractor 2 sees the blinking green graphic 151 whose display mode has changed and confirms (recognizes) that the working unit 6 has reached the maximum offset position, he or she releases the long press on the manual offset button 121. Then, the blinking display (flashing green) of the green graphic 151 changes to a lit display (lit green).

[0122] In this way, the display mode of the graphic 151 differs between when the working unit 6 is located at the maximum offset position, which is a predetermined position, and when the working unit 6 is located at a position other than the maximum offset position.

[0123] That is, this figure 151 is displayed in one display mode, i.e., a display mode in which it lights up in one color, blue (blue light), for example, until the working unit 6 reaches the maximum offset position, and when the working unit 6 reaches the maximum offset position, it is displayed in another display mode different from the one display mode, i.e., a display mode in which it flashes in a color, green, for example, different from the one color (green flashing).

[0124] The timing at which the sound generating unit 10 stops generating sound is not limited to the point at which the working unit 6 in the horizontal position described above reaches the maximum offset position, but may also be the point at which the operator releases the long press on the manual offset button 121, for example.

[0125] FIG. 9 is an explanatory diagram of the case where the manual storage button 122 of the remote control operation device 8 is operated.

[0126] The mowing machine 1 shown in FIG. 9(a) is positioned so that the working unit 6 is in a horizontal position and at the maximum offset position, protruding further to the right than the tractor 2.

[0127] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG. 9(a).

[0128] That is, for example, as shown in the figure, in the first display portion 131, the word "NORMAL" 141 is displayed lit in black, and a square graphic 142 is displayed lit in blue.

[0129] In addition, in the second display portion 132, the character 143 for "slide" is displayed lit in black, the character 144 for "exit" and a triangular figure 145 are displayed lit in gray, and the character 146 for "enter" and a triangular figure 147 are displayed lit in black.

[0130] Furthermore, in the third display portion 133, the figure 151 in the most extended state is displayed lit in green, and the scale 152 is displayed lit in white.

[0131] When the operator on the tractor 2 presses and holds the manual storage button 122, the working unit 6, which is in a horizontal position, first moves to the left as shown in Figure 9(b), and the sound generating unit 10 generates a sound (for example, a warning sound such as "beep, beep, beep").

[0132] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG. 9(b).

[0133] That is, for example, as shown in the figure, in the first display portion 131, the word "NORMAL" 141 is displayed lit in black, and a square graphic 142 is displayed lit in blue.

[0134] In addition, in the second display portion 132, the character 143 for "slide" is displayed lit in black, the character 144 for "exit" and a triangular figure 145 are displayed lit in black, and the character 146 for "enter" and a triangular figure 147 are also displayed lit in black.

[0135] Furthermore, in the third display portion 133, a figure 151 that has changed shape in response to the movement of the working unit 6 and is in a contracted state is displayed lit in blue, and a scale 152 is displayed lit in white.

[0136] That is, the moving side 156 of the graphic 151 displayed in the third display portion 133 moves leftward in response to the movement of the working unit 6, and the area of ​​the graphic 151 decreases in accordance with the amount of movement of the working unit 6. When the long press operation of the manual storage button 122 is released midway, the movement of the working unit 6 and the change in shape of the graphic 151 stop at that midway point, and the sound generating unit 10 stops generating sound.

[0137] Next, as shown in FIG. 9(c), when the working unit 6 in the horizontal position moves leftward to the storage position (the limit of movement position suitable for driving on public roads), the sound generating unit 10 stops generating sound.

[0138] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG. 9(c).

[0139] That is, for example, as shown in the figure, in the first display portion 131, the word "NORMAL" 141 is displayed lit in black, and a square graphic 142 is displayed lit in blue.

[0140] In addition, in the second display portion 132, the character 143 for "slide" is displayed lit in black, the character 144 for "exit" and a triangular figure 145 are displayed lit in black, and the character 146 for "enter" and a triangular figure 147 are displayed lit in gray.

[0141] Furthermore, in the third display portion 133, a figure 151 whose shape changes in response to the movement of the working unit 6 and is in its most contracted state is displayed flashing in blue, and a scale 152 is displayed lit in white. Note that a gray "ON" character 146 and a triangular figure 147 may be displayed flashing together with the figure 151, or the entire third display portion 133 may be displayed flashing.

[0142] Then, when the worker on tractor 2 sees the blinking display of blue graphic 151 that has changed in display mode and confirms (recognizes) that working unit 6 has reached the storage position, he or she releases the long press on manual storage button 122. Then, the blinking display (blue blinking) of blue graphic 151 changes to a lit display (blue lit).

[0143] In this way, the display mode of the graphic 151 differs depending on whether the working unit 6 is in the storage position, which is a predetermined position, or in a position other than the storage position.

[0144] That is, this figure 151 is displayed in one display mode, i.e., a display mode in which it lights up in blue (blue light), until the working unit 6 reaches the storage position, and when the working unit 6 reaches the storage position, it is displayed in another display mode different from the one display mode, i.e., a display mode in which it flashes in blue (blue flashing).

[0145] The timing at which the sound generating unit 10 stops generating sound is not limited to the time when the working unit 6 in the horizontal position described above reaches the storage position, but may be, for example, the time when the operator releases the long press on the manual storage button 122.

[0146] FIG. 10 is an explanatory diagram of the case where the manual upward rotation button 123 of the remote control operation device 8 is operated.

[0147] The mowing machine 1 shown in FIG. 10(a) is positioned so that the working unit 6 is in a horizontal position and at the maximum offset position, protruding further to the right than the tractor 2.

[0148] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in Fig. 10(a). Note that this screen is the screen that appears when the display switching button 118 is operated before the manual upward rotation button 123 is operated. However, even if, for example, the manual upward rotation button 123 is operated with the screen shown in Fig. 9(a) displayed without operating the display switching button 118, the screen automatically switches from the confirmation screen for displaying the offset amount shown in Fig. 9(a) to the confirmation screen for displaying the attitude angle shown in Fig. 10(a). Note that the same is true in reverse, where the confirmation screen for displaying the attitude angle automatically switches to the confirmation screen for displaying the offset amount.

[0149] That is, for example, as shown in the figure, in the first display portion 161, the word "NORMAL" 171 is displayed lit in black, and a square graphic 172 is displayed lit in blue.

[0150] In addition, in the second display portion 162, the character 173 for "tilt" is displayed lit in black, the character 174 for "up" and a triangular figure 175 are displayed lit in black, and the character 176 for "down" and a triangular figure 177 are also displayed lit in black.

[0151] Furthermore, in the third display portion 163, the figure 181 in a state where the rotation side 184 coincides with the horizontal attitude mark line 186 is displayed lit in green, and the scale 182 is displayed lit in white.

[0152] When the worker on the tractor 2 presses and holds the manual upward rotation button 123, the working unit 6 in the maximum offset state first rotates upward as shown in Figure 10(b), and the sound generating unit 10 generates a sound (for example, a warning sound such as "beep, beep, beep").

[0153] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG. 10(b).

[0154] That is, for example, as shown in the figure, in the first display portion 161, the word "NORMAL" 171 is displayed lit in black, and a square graphic 172 is displayed lit in blue.

[0155] In addition, in the second display portion 162, the character 173 for "tilt" is displayed lit in black, the character 174 for "up" and a triangular figure 175 are displayed lit in black, and the character 176 for "down" and a triangular figure 177 are also displayed lit in black.

[0156] Furthermore, in the third display portion 163, a figure 181 whose shape changes in response to the rotation of the working unit 6 and whose rotation side 184 coincides with the scale line 189 is displayed lit in blue, and the scale 182 is displayed lit in white.

[0157] That is, the shape of the graphic 181 displayed in the third display portion 163 changes as the rotation side 184 rotates counterclockwise around the rotation center point P in response to the rotation of the working unit 6. When the long press operation of the manual upward rotation button 123 is released midway, the rotation of the working unit 6 and the change in shape of the graphic 181 stop at that midway point, and the sound generating unit 10 stops generating sound.

[0158] Subsequently, as shown in FIG. 10(c), when the working unit 6 in the maximum offset state rotates upward to the maximum upward tilt position (movable limit position), the sound generating unit 10 stops generating sound.

[0159] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG. 10(c).

[0160] That is, for example, as shown in the figure, in the first display portion 161, the word "NORMAL" 171 is displayed lit in black, and a square graphic 172 is displayed lit in blue.

[0161] In addition, in the second display portion 162, the character 173 for "slant" is displayed lit in black, the character 174 for "up" and a triangular figure 175 are displayed lit in gray, and the character 176 for "down" and a triangular figure 177 are displayed lit in black.

[0162] Furthermore, in the third display portion 163, a figure 181 whose shape changes in response to the rotation of the working unit 6 and whose rotation side 184 coincides with a mark line 187 for the maximum upward tilt posture is displayed flashing in blue, and a scale 182 is displayed lit in white. Note that a gray character "up" 174 and a triangular figure 175 may be displayed flashing together with the figure 181, or the entire third display portion 163 may be displayed flashing.

[0163] Then, when the worker on the tractor 2 sees the blinking display of the blue graphic 181 that has changed in display mode and confirms (recognizes) that the working unit 6 has reached the maximum upward tilt position, he or she releases the long press on the manual upward rotation button 123. Then, the blinking display (blue blinking) of the blue graphic 181 changes to a lit display (blue lit).

[0164] In this way, the display mode of the graphic 181 differs between when the working unit 6 is in the maximum upward tilt position, which is a predetermined position, and when it is in a position other than the maximum upward tilt position.

[0165] That is, this figure 181 is displayed in one display mode, i.e., a display mode in which it lights up in blue (blue light), until the working unit 6 reaches the maximum upward tilt position, and when the working unit 6 reaches the maximum upward tilt position, it is displayed in another display mode different from the one display mode, i.e., a display mode in which it flashes in blue (blue flashing).

[0166] The timing at which the sound generating unit 10 stops generating sound is not limited to the time when the working unit 6 in the maximum offset state described above reaches the maximum upward tilt position, but may also be, for example, the time when the operator releases the long press on the manual upward rotation button 123.

[0167] FIG. 11 is an explanatory diagram of the case where the manual downward rotation button 124 of the remote control operation device 8 is operated.

[0168] The mowing machine 1 shown in FIG. 11(a) is positioned so that the working unit 6 is in a horizontal position and at the maximum offset position, protruding further to the right than the tractor 2.

[0169] At this time, the screen shown in Fig. 11(a), for example, is displayed on the display unit 111 of the remote control operating device 8. Note that, like the screen shown in Fig. 10(a) above, this screen is the screen that appears when the display switching button 118 is operated before the manual downward rotation button 124 is operated, but even if, for example, the manual downward rotation button 124 is operated with the screen shown in Fig. 9(a) displayed without operating the display switching button 118, the screen will automatically switch from the screen shown in Fig. 9(a) to the screen shown in Fig. 11(a).

[0170] That is, for example, as shown in the figure, in the first display portion 161, the word "NORMAL" 171 is displayed lit in black, and a square graphic 172 is displayed lit in blue.

[0171] In addition, in the second display portion 162, the character 173 for "tilt" is displayed lit in black, the character 174 for "up" and a triangular figure 175 are displayed lit in black, and the character 176 for "down" and a triangular figure 177 are also displayed lit in black.

[0172] Furthermore, in the third display portion 163, the figure 181 in a state where the rotation side 184 coincides with the horizontal attitude mark line 186 is displayed lit in green, and the scale 182 is displayed lit in white.

[0173] When the operator on the tractor 2 presses and holds the manual downward rotation button 124, the working unit 6 in the maximum offset state first rotates downward as shown in FIG. 11(b), and the sound generating unit 10 generates a sound (for example, a warning sound such as "beep, beep, beep").

[0174] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG. 11(b).

[0175] That is, for example, as shown in the figure, in the first display portion 161, the word "NORMAL" 171 is displayed lit in black, and a square graphic 172 is displayed lit in blue.

[0176] In addition, in the second display portion 162, the character 173 for "tilt" is displayed lit in black, the character 174 for "up" and a triangular figure 175 are displayed lit in black, and the character 176 for "down" and a triangular figure 177 are also displayed lit in black.

[0177] Furthermore, in the third display portion 163, a figure 181 whose shape changes in response to the rotation of the working unit 6 and whose rotation side 184 coincides with the scale line 190 is displayed lit in blue, and the scale 182 is displayed lit in white.

[0178] That is, the shape of the graphic 181 displayed in the third display portion 163 changes as the rotation side 184 rotates clockwise around the rotation center point P in response to the rotation of the working unit 6. When the long press operation of the manual lower rotation button 124 is released midway, the rotation of the working unit 6 and the change in shape of the graphic 181 stop at that midway point, and the sound generating unit 10 stops generating sound.

[0179] Subsequently, as shown in FIG. 11(c), when the working unit 6 in the maximum offset state rotates downward to the maximum downward tilt position (movable limit position), the sound generating unit 10 stops generating sound.

[0180] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG. 11(c).

[0181] That is, for example, as shown in the figure, in the first display portion 161, the word "NORMAL" 171 is displayed lit in black, and a square graphic 172 is displayed lit in blue.

[0182] In addition, in the second display portion 162, the character 173 for "tilt" is displayed lit in black, the character 174 for "up" and a triangular figure 175 are displayed lit in black, and the character 176 for "down" and a triangular figure 177 are displayed lit in gray.

[0183] Furthermore, in the third display portion 163, a figure 181 whose shape changes in response to the rotation of the working unit 6 and whose rotation side 184 coincides with a mark line 188 for the maximum downward tilt posture is displayed flashing in blue, and a scale 182 is displayed lit in white. Note that a gray character "down" 176 and a triangular figure 177 may be displayed flashing together with the figure 181, or the entire third display portion 163 may be displayed flashing.

[0184] Then, when the worker on the tractor 2 sees the blinking display of the blue graphic 181 that has changed in display mode and confirms (recognizes) that the working unit 6 has reached the maximum downward tilt position, he or she releases the long press on the manual downward rotation button 124. Then, the blinking display (blue blinking) of the blue graphic 181 changes to a lit display (blue lit).

[0185] In this way, the display mode of the graphic 181 differs between when the working unit 6 is in the maximum downward tilt position, which is a predetermined position, and when it is in a position other than the maximum downward tilt position.

[0186] That is, this figure 181 is displayed in one display mode, i.e., a display mode in which it lights up in blue (blue light), until the working unit 6 reaches the maximum downward tilt position, and when the working unit 6 reaches the maximum downward tilt position, it is displayed in another display mode different from the one display mode, i.e., a display mode in which it flashes in blue (blue flashing).

[0187] The timing at which the sound generating unit 10 stops generating sound is not limited to the time when the working unit 6 in the maximum offset state described above reaches the maximum downward tilt position, but may also be the time when the operator releases the long press on the manual downward rotation button 124, for example.

[0188] FIG. 12 is an explanatory diagram of the case where the automatic offset button 126 of the remote control operation device 8 is operated.

[0189] The mowing machine 1 shown in FIG. 12( a ) has the working unit 6 in a horizontal position at the rear of the tractor 2 in a storage position.

[0190] At this time, the screen shown in Fig. 12(a), for example, is displayed on the display unit 111 of the remote control operation device 8. Note that this screen is the screen that appears when the mode switching button 119 is operated to switch to the automatic mode before operating the automatic offset button 126. In other words, when operating the automatic buttons 126 to 129, it is necessary to operate the mode switching button 119 in advance to switch to the automatic mode.

[0191] That is, for example, as shown in the figure, in the first display portion 131, the word "AUTO" 141 is displayed lit in black, and a rectangular figure 142 is displayed lit in red.

[0192] In addition, in the second display portion 132, the character 143 for "slide" is displayed lit in black, the character 144 for "exit" and a triangular figure 145 are displayed lit in black, and the character 146 for "enter" and a triangular figure 147 are displayed lit in gray.

[0193] Furthermore, in the third display portion 133, the most contracted figure 151 is displayed lit in blue, and the scale 152 is displayed lit in white.

[0194] When the worker on the tractor 2 presses the automatic offset button 126 once, the working unit 6, which is in a horizontal position, first moves to the right as shown in Figure 12(b), and the sound generating unit 10 generates a sound (for example, a warning sound such as "beep, beep, beep").

[0195] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG. 12(b).

[0196] That is, for example, as shown in the figure, in the first display portion 131, the word "AUTO" 141 is displayed lit in black, and a rectangular figure 142 is displayed lit in red.

[0197] Additionally, in the second display portion 132, the character string 143 for "put out" is displayed lit in black, and a rotation motion display 191 is displayed in red. This rotation motion display 191 is an operation display that indicates that the working unit 6 is in operation, for example, by one of a plurality of red rectangular figures 192 positioned radially going out in a circular motion.

[0198] Furthermore, in the third display portion 133, a figure 151 that has changed shape in response to the movement of the working unit 6 and is stretched is displayed lit in blue, and a scale 152 is displayed lit in white.

[0199] That is, the area of ​​the graphic 151 displayed in the third display portion 133 increases in accordance with the amount of movement of the working unit 6 as the moving side 156 moves to the right in response to the movement of the working unit 6.

[0200] 12(c), when the working unit 6 in the horizontal position moves to the right to the maximum offset position (the movable limit position that is the optimum position for mowing), the sound generated by the sound generating unit 10 changes. For example, the intermittent warning sound of "beep, beep, beep" (the first sound) changes to a continuous warning sound of "beep--" (a different sound from the first sound), and this continuous warning sound stops after a predetermined time has elapsed (for example, after a few seconds).

[0201] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG.

[0202] That is, for example, as shown in the figure, in the first display portion 131, the word "AUTO" 141 is displayed lit in black, and a rectangular figure 142 is displayed lit in red.

[0203] In addition, the second display portion 132 displays the word "submit" 143 in a lit black color, and the word "complete" 193 in a lit black color. The word "complete" 193 is, for example, a white character displayed in a blue rectangular shape 194.

[0204] Furthermore, in the third display portion 133, a figure 151 whose shape changes in response to the movement of the working unit 6 and is in its most extended state is displayed lit in green, and the scale 152 is displayed lit in white. As in the manual mode, the figure 151 may be displayed flashing in green, and in this case, the black character "put out" 143 may be displayed flashing together with the figure 151, or the entire third display portion 133 may be displayed flashing.

[0205] In this way, even in the automatic mode, the graphic 151 is displayed differently when the working unit 6 is located at the maximum offset position, which is a predetermined position, and when it is located at a position other than the maximum offset position.

[0206] That is, this figure 151 is displayed in one display mode, i.e., a display mode in which it is lit in one color, blue (blue light), until the working unit 6 reaches the maximum offset position, and when the working unit 6 reaches the maximum offset position, it is displayed in another display mode different from the one display mode, i.e., a display mode in which it is lit in a color, for example, green (green light), which is different from the one color.

[0207] FIG. 13 is an explanatory diagram of the case where the automatic storage button 127 of the remote control operation device 8 is operated.

[0208] The mowing machine 1 shown in FIG. 13(a) is positioned so that the working unit 6 is in a horizontal position and at the maximum offset position, protruding further to the right than the tractor 2.

[0209] At this time, the screen shown in Fig. 13(a), for example, is displayed on the display unit 111 of the remote control operation device 8. Note that this screen, like the screen shown in Fig. 12(a) above, is the screen that appears when the mode switching button 119 is operated to switch to the automatic mode before the automatic storage button 127 is operated.

[0210] That is, for example, as shown in the figure, in the first display portion 131, the word "AUTO" 141 is displayed lit in black, and a rectangular figure 142 is displayed lit in red.

[0211] In addition, in the second display portion 132, the character 143 for "slide" is displayed lit in black, the character 144 for "exit" and a triangular figure 145 are displayed lit in gray, and the character 146 for "enter" and a triangular figure 147 are displayed lit in black.

[0212] Furthermore, in the third display portion 133, the figure 151 in the most extended state is displayed lit in green, and the scale 152 is displayed lit in white.

[0213] When the worker on the tractor 2 presses the automatic storage button 127 once, the working unit 6 in the horizontal position first moves to the left as shown in Figure 13(b), and the sound generating unit 10 generates a sound (for example, a warning sound such as "beep, beep, beep").

[0214] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG. 13(b).

[0215] That is, for example, as shown in the figure, in the first display portion 131, the word "AUTO" 141 is displayed lit in black, and a rectangular figure 142 is displayed lit in red.

[0216] In addition, in the second display portion 132, the character "Enter" 143 is displayed in black and lit, and the rotation motion display 191 is displayed in red.

[0217] Furthermore, in the third display portion 133, a figure 151 that has changed shape in response to the movement of the working unit 6 and is in a contracted state is displayed lit in blue, and a scale 152 is displayed lit in white.

[0218] That is, the area of ​​the graphic 151 displayed in the third display portion 133 decreases in accordance with the amount of movement of the working unit 6 as the moving side 156 moves leftward in response to the movement of the working unit 6 .

[0219] 13(c), when the working unit 6 in the horizontal position moves leftward to the storage position, the sound generated by the sound generating unit 10 changes. For example, the intermittent warning sound of "beep, beep, beep" (the first sound) changes to a continuous warning sound of "beep--" (a different sound from the first sound), and this continuous warning sound stops after a predetermined time has elapsed (for example, after a few seconds).

[0220] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG.

[0221] That is, for example, as shown in the figure, in the first display portion 131, the word "AUTO" 141 is displayed lit in black, and a rectangular figure 142 is displayed lit in red.

[0222] In addition, the second display portion 132 displays the word "Enter" 143 in a lit black color, and the word "Complete" 193 in a lit black color. The word "Complete" 193 is, for example, a white character displayed in a blue rectangular shape 194.

[0223] Furthermore, in the third display portion 133, a figure 151 whose shape changes in response to the movement of the working unit 6 and is in its most contracted state is displayed lit in blue, and a scale 152 is displayed lit in white.

[0224] As in the manual mode, the figure 151 may be displayed flashing in blue, and in this case, the black character "Enter" 143 may be displayed flashing together with the figure 151, or the entire third display portion 133 may be displayed flashing. When the figure 151 is displayed flashing in blue in this way, even in the automatic mode, the display state differs between when the working unit 6 is in the storage position, which is the predetermined position, and when it is in a position other than the storage position.

[0225] FIG. 14 is an explanatory diagram of the case where the automatic level button 128 of the remote control operation device 8 is operated.

[0226] The brush cutter 1 shown in FIG. 14(a) has the working unit 6 in the maximum downward tilt position at the maximum offset position, protruding to the right of the tractor 2. At this time, the screen shown in Fig. 14(a), for example, is displayed on the display unit 111 of the remote control operation device 8. Note that this screen is the screen that appears when the mode switching button 119 is operated to switch to the automatic mode before the automatic level button 128 is operated.

[0227] That is, for example, as shown in the figure, in the first display portion 161, the word "AUTO" 171 is displayed lit in black, and a rectangular figure 172 is displayed lit in red.

[0228] In addition, in the second display portion 162, the character 173 for "tilt" is displayed lit in black, the character 174 for "up" and a triangular figure 175 are displayed lit in black, and the character 176 for "down" and a triangular figure 177 are displayed lit in gray.

[0229] Furthermore, in the third display portion 163, the figure 181 in a state where the rotation side 184 coincides with the mark line 188 for the maximum downward tilt posture is displayed lit in blue, and the scale 182 is displayed lit in white.

[0230] Then, when the worker on the tractor 2 presses the automatic leveling button 128 once, the working unit 6 in the maximum offset state first rotates upward as shown in Figure 14(b), and the sound generating unit 10 generates a sound (for example, a warning sound such as "beep, beep, beep").

[0231] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG.

[0232] That is, for example, as shown in the figure, in the first display portion 161, the word "AUTO" 171 is displayed lit in black, and a rectangular figure 172 is displayed lit in red.

[0233] Additionally, in the second display portion 162, the word "horizontal" 173 is displayed lit in black, and a reciprocating motion display 196 is displayed in red. This reciprocating motion display 196 is an in-operation display that indicates that the working unit 6 is rotating (in operation), for example, by sequentially turning off one of a plurality of red circular figures 197 lined up in the left-right direction in a reciprocating manner. Note that instead of this reciprocating motion display 196, the above-mentioned rotation motion display 191 may be displayed in red in the second display portion 162.

[0234] Furthermore, in the third display portion 163, a figure 181 whose shape changes in response to the rotation of the working unit 6 and whose rotation side 184 coincides with the scale line 190 is displayed lit in blue, and the scale 182 is displayed lit in white.

[0235] That is, the shape of the graphic 181 displayed in the third display portion 163 changes as the rotation side 184 rotates counterclockwise around the rotation center point P in response to the rotation of the working unit 6.

[0236] 14(c), when the working unit 6 in the maximum offset state rotates upward to a horizontal position, the sound generated by the sound generating unit 10 changes. For example, the intermittent warning sound of "beep, beep, beep" (the first sound) changes to a continuous warning sound of "beep--" (a different sound from the first sound), and this continuous warning sound stops after a predetermined time has elapsed (for example, after a few seconds).

[0237] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG.

[0238] That is, for example, as shown in the figure, in the first display portion 161, the word "AUTO" 171 is displayed lit in black, and a rectangular figure 172 is displayed lit in red.

[0239] Additionally, in the second display portion 162, the word "horizontal" 173 is displayed in black and illuminated, and the word "completed" 193 is displayed in black and illuminated. The word "completed" 193 is, for example, a white character displayed in a blue rectangular shape 194.

[0240] Furthermore, in the third display portion 163, a figure 181 whose shape changes in response to the rotation of the working unit 6 and whose rotation side 184 coincides with the horizontal position mark line 186 is displayed lit in green, and the scale 182 is displayed lit in white. Note that, as in the manual mode, the figure 181 may be displayed in a flashing green color, and in this case, the black word "horizontal" 173 may be displayed flashing together with the figure 181, or the entire third display portion 163 may be displayed in a flashing color.

[0241] In this way, even in the automatic mode, the graphic 181 is displayed differently when the working unit 6 is in the predetermined horizontal position and when it is in a position other than the horizontal position.

[0242] That is, this figure 181 is displayed in one display mode, i.e., a display mode in which it is lit in one color, blue (blue light), until the working unit 6 reaches a horizontal position, and when the working unit 6 reaches a horizontal position, it is displayed in another display mode different from the one display mode, i.e., a display mode in which it is lit in a color, for example, green (green light), which is a color different from the one color.

[0243] FIG. 15 is an explanatory diagram of a case where the automatic travel button 129 of the remote control operation device 8 is operated.

[0244] The mowing machine 1 shown in FIG. 15(a) is in an upwardly inclined position with the working unit 6 at the maximum offset position and protruding to the right of the tractor 2.

[0245] 15(a), for example, is displayed on the display unit 111 of the remote control operation device 8. Note that this screen is the screen that appears when the mode switching button 119 is operated to switch to the automatic mode before the automatic level button 129 is operated.

[0246] That is, for example, as shown in the figure, in the first display portion 161, the word "AUTO" 171 is displayed lit in black, and a rectangular figure 172 is displayed lit in red.

[0247] In addition, in the second display portion 162, the character 173 for "tilt" is displayed lit in black, the character 174 for "up" and a triangular figure 175 are displayed lit in black, and the character 176 for "down" and a triangular figure 177 are displayed lit in black.

[0248] Furthermore, in the third display portion 163, the figure 181 in a state in which the rotation side 184 coincides with the scale line 189 is displayed lit in blue, and the scale 182 is displayed lit in white.

[0249] Then, when the worker on the tractor 2 presses the automatic driving button 129 once, first, as shown in Figure 15(b), the sound generating unit 10 generates a sound (for example, a warning sound such as "beep, beep, beep"), and the working unit 6 starts moving to the left.

[0250] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG. 15(b).

[0251] That is, for example, as shown in the figure, the first display portion 131 displays the word "AUTO" 141 lit in black and the square figure 142 lit in red. Also, the second display portion 132 displays the word "DRIVE" 143 lit in black and the rotation motion display 191 in red. Furthermore, the third display portion 133 displays the figure 151 in its most extended state lit in green and the scale 152 lit in white.

[0252] Then, when working unit 6 starts to move leftward, as shown in FIG. 15(c), graphic 151 changes to a blue lighting display and changes shape so as to gradually shrink in response to the movement of working unit 6.

[0253] Next, when the working unit 6 reaches the storage position, as shown in Figure 15(d), the confirmation screen for offsetting automatically switches to the confirmation screen for posture, and the working unit 6 starts to rotate downward (rotating the working unit to a horizontal position).

[0254] 15(e), when the working unit 6 in the stored state is rotated downward to a horizontal position, the sound generated by the sound generating unit 10 changes. For example, the intermittent warning sound of "beep, beep, beep" (the first sound) changes to a continuous warning sound of "beep--" (a different sound from the first sound), and this continuous warning sound stops after a predetermined time has elapsed (for example, after a few seconds).

[0255] At this time, the display unit 111 of the remote control operation device 8 displays, for example, a screen as shown in FIG.

[0256] That is, for example, as shown in the figure, in the first display portion 161, the word "AUTO" 171 is displayed lit in black, and a rectangular figure 172 is displayed lit in red.

[0257] In addition, the second display portion 162 displays the word "RUN" 173 in a lit black color, and the word "COMPLETE" 193 in a lit black color. The word "COMPLETE" 193 is, for example, a white character displayed in a blue rectangular shape 194.

[0258] Furthermore, in the third display portion 163, a figure 181 whose shape changes in response to the rotation of the working unit 6 and whose rotation side 184 is aligned with the horizontal attitude mark line 186 is displayed lit in green, and the scale 182 is displayed lit in white. Note that, as in the manual mode, the figure 181 may be displayed flashing in green, and in this case, the black word "travel" 173 may be displayed flashing together with the figure 181, or the entire third display portion 163 may be displayed flashing.

[0259] In this way, even in the automatic mode, the graphic 181 is displayed differently when the working unit 6 is in the predetermined horizontal position and when it is in a position other than the horizontal position.

[0260] In other words, this figure 181 is displayed in one display mode, i.e., a display mode in which it is lit in one color, blue (blue light), for example, until the working unit 6 in the stored state reaches the traveling position, which is a horizontal position, and when the working unit 6 in the stored state reaches the traveling position, which is a horizontal position, it is displayed in another display mode different from the one display mode, i.e., a display mode in which it is lit in a color, green, for example, different from the one color (green light).

[0261] For example, if the travel position is set to the maximum upward tilt position rather than the horizontal position, the working unit 6 in the stored state rotates to the maximum upward tilt position, as shown in Figure 15(e'), and a corresponding figure 181 is displayed on the display unit 111 of the remote control operating device 8.

[0262] As described above, such a brush cutting machine 1 is equipped with a working unit 6 that can be repositioned left and right and up and down, a drive unit 12 for repositioning the working unit 6, a control unit 15 for controlling the drive unit 12, and a remote control operation device 8 equipped with a display unit 111 that displays predetermined information including confirmation displays 140, 170, etc. for checking the position of the working unit 6 (current working status, etc.) based on information (signals) from the control unit 15.Therefore, for example, an operator riding on a tractor 2 can easily and accurately check the position of the working unit 6 (current position, such as offset position or tilt position) simply by visually checking the figures 151, 181, etc. of the confirmation displays 140, 170 displayed on the display unit 111 of the remote control operation device 8 in his or her hand, without directly looking at the working unit 6.

[0263] Furthermore, the shapes 151, 181 of the confirmation displays 140, 170 change in shape simultaneously with the movement of the working unit 6 over the entire range of its position change in response to the change in position of the working unit 6, making it possible to confirm the position of the working unit 6 even more easily and accurately.

[0264] Moreover, in particular, the confirmation display 170 for checking the horizontal posture of the working unit 6 has, in addition to the scale 182, a horizontal posture marker line 186 that coincides with the rotation edge 184 when the working unit 6 is in a horizontal posture, a maximum upward tilt posture marker line 187 that coincides with the rotation edge 184 when the working unit 6 is in a maximum upward tilt posture, and a maximum downward tilt posture marker line 188 that coincides with the rotation edge 184 when the working unit 6 is in a maximum downward tilt posture, so that the worker can easily check the posture of the working unit 6 just by glancing at the confirmation display 170.

[0265] Furthermore, even if an abnormality such as a malfunction occurs in the display unit 111 of the remote control operation device 8, the worker on the tractor 2 can easily check the attitude angle of the working unit 6 from the tractor 2 side by looking at the confirmation means 81.

[0266] Next, another embodiment of the present invention will be described with reference to FIGS.

[0267] The agricultural implement shown in Figure 16 is a ridge painting machine 1a, which is detachably connected to the rear of a tractor 2 and moves forward (in the direction of travel) as the tractor 2 travels, performing the designated task of painting ridges.

[0268] The offset work machine, ridge painting machine 1a, is equipped with an attachment section 201 that is detachably connected (attached) to the three-point link section at the rear of tractor 2, a working section 202 that can be changed between a stored state and an offset state and performs ridge painting work in the desired offset state, and a connecting section (offset mechanism section) 203 that connects the front and rear attachment sections 201 and working section 202.

[0269] The working unit 202 has an embankment body (cultivation unit) 205 that rotates in a predetermined direction to till the rice field surface and ridges (original ridges) and pile up the soil, and a ridge formation body (disk unit) 206 that rotates in a predetermined direction to compact the soil mounded by the embankment body 205 and form a ridge (new ridge), and water can be supplied to this ridge formation body 206 by a sprinkler device 207.

[0270] The working unit 202 can move left and right by extending and contracting the first cylinder 211 for offsetting, thereby changing the left and right position of the working unit 202. The embankment body 205 can rotate up and down by extending and contracting the second cylinder 212 for tillage depth, thereby changing the tillage depth position (vertical position) of the embankment body 205.

[0271] In addition, the furrow coating machine 1a is equipped with a control unit 215 that controls the first and second cylinders (driving means) 211, 212, etc. based on information from the first and second sensors (e.g., potentiometers) 213, 214, etc., and this control unit 215 is provided with a sound generating unit (e.g., buzzer) 216.

[0272] Furthermore, the ridge coating machine 1a is provided with, for example, a remote control operation device 220 shown in FIG. 17 as a display device capable of communicating with the control unit (which may be the control unit of the tractor 2) 215.

[0273] As shown in FIG. 17, the remote control operation device 220 includes a display unit 221 that displays predetermined information based on information (signals) from the control unit 215, and an operation unit 222 that is pressed and operated by a worker (operator) sitting in the driver's seat of the tractor 2.

[0274] The display unit 221 is, for example, a liquid crystal color display provided at the top of the front side of the device body 223. The operation unit 222 is, for example, made up of a plurality of push buttons (switches) provided in a dispersed manner on the front side of the device body 223.

[0275] Here, the operation unit 222 has a power button 226 , a decision button 227 , a display switching button (screen switching button) 228 , a mode switching button 229 , and a setting button 230 .

[0276] The display switching button 228 is a button for switching to one of an offset confirmation screen (for example, the screens shown in FIGS. 18(a) and (b)) for checking the left-right position (offset amount) of the working unit 202, a tillage depth confirmation screen (for example, the screen shown in FIG. 18(c)) for checking the tillage depth position (tillage depth amount) of the embankment body 205, and a water sprinkling confirmation screen for checking the amount of water sprinkled by the water sprinkler device 207. The setting button 230 is a button for switching to a setting mode for making various settings, and in the setting mode, for example, it is possible to preset the offset amount, tillage depth amount, water sprinkling amount, etc. as setting values.

[0277] The operation unit 222 also has buttons related to the working unit 202, such as an "out" button 231, an "in" button 232, a "shallow" button 233, a "deep" button 234, a "store" button 235, a "before work" button 236, and an "after work" button 237. The operation unit 222 also has buttons 238 to 240 related to the sprinkler device 207.

[0278] Next, Fig. 18 is a diagram showing screens displayed on the display unit 221 of the remote control operation device 220. The screens shown in Fig. 18(a) and (b) are confirmation screens for offset, and the screen shown in Fig. 18(c) is a confirmation screen for tillage depth.

[0279] The screens shown in Figures 18(a) and (b) have a first display portion 241 that displays a mode display 245, a radio wave status display 246, and a battery remaining amount display 247, a second display portion 242 that displays a movement-related display 248 related to the left-right movement of the working unit 202, and a third display portion 243 that displays a confirmation display 250 for checking the current left-right position (position in the left-right direction) of the working unit 202.

[0280] The background color of the first display portion 241 is, for example, gray, and the background color of the second display portion 242 and the third display portion 243 is, for example, white.

[0281] The mode display 245 has characters 251 indicating the current mode (for example, black characters such as "NORMAL" or "AUTO") and a fixed rectangular graphic 252. The rectangular graphic 252 is displayed in blue, for example, in the manual mode, and in red, for example, in the automatic mode.

[0282] The movement-related display (action-related display) 248 has a triangular figure 255, which is a fixed shape indicating the movement direction of the working unit 202, and a triangular figure 257, which is a fixed shape indicating the movement direction of the working unit 202. Note that the word "offset" 253 is located between the two figures 255 and 257.

[0283] The right triangular figure 255 is displayed, for example, in gray when the working unit 202 cannot move to the right (when it is located at the maximum offset position), and is displayed, for example, in black (a color that is more noticeable than the color when the working unit 202 cannot move, such as a dark color, is preferable) when the working unit 202 can move to the right.

[0284] Furthermore, the triangular figure 257 on the left side is displayed, for example, in gray when the working unit 202 cannot be moved to the left side (when it is located in the storage position), and is displayed, for example, in black (a color that is more noticeable than the color when the working unit 202 cannot be moved, such as a dark color, is preferable) when the working unit 202 can be moved to the left side.

[0285] The confirmation display 250 has a figure 261 whose shape changes in response to a change in position due to left-right movement of the working unit 202 (a change in the left-right position of the working unit due to the extension and contraction of the first cylinder 211), a scale 262 whose shape does not change in response to a change in position of the working unit 202, and numbers 263 corresponding to this scale 262.

[0286] The confirmation display 250 also has a rectangular figure 264, which has a fixed shape indicating the current setting value, and a vertically elongated bar-shaped figure 265, which has a fixed shape indicating that the working unit 202 is located in a position where work is not possible (no work area).

[0287] The vertically elongated bar-shaped figure 265 is always lit in red, for example, and when the working unit 202 during an offset operation moves to a position where it can work, for example, a blue figure 261 appears and extends to the right from the red figure 265.

[0288] More specifically, for example, when the working unit 202 is located in the storage position and the screen shown in Figure 18(b) is displayed on the display unit 221, if the worker on the tractor 2 presses and holds the "Before Work" button 236, the working unit 202 will move to the right to the offset position corresponding to the set value, and the sound generating unit 216 will generate a sound during this movement.

[0289] Then, when the working unit 202 leaves the work-prohibited area, a blue figure 261 appears, as shown in FIG. 18(a), and this figure 261 is displayed extending to the right from the red figure 265 to the position of the figure 264 indicating the set value.

[0290] Thereafter, the offset position of working unit 202 can be fine-tuned by operating "out" button 231 or "in" button 232, and moving side 260 of figure 261 moves in response to this fine adjustment. In automatic mode, by pressing "before work" button 236 once, working unit 202 operates in the same way and the same screen is displayed on display unit 221.

[0291] On the other hand, the screen shown in Figure 18(c) has a first display portion 271 that displays a mode display 275, a radio wave status display 276, and a battery remaining capacity display 277, a second display portion 272 that displays a rotation-related display 278 related to the vertical rotation of the embankment body 205, and a third display portion 273 that displays a confirmation display 280 for checking the tillage depth position, which is the current vertical position of the embankment body 205.

[0292] The background color of the first display portion 271 is, for example, gray, and the background color of the second display portion 272 and the third display portion 273 is, for example, white.

[0293] The mode display 275 has characters 281 indicating the current mode (for example, black characters such as "NORMAL" or "AUTO") and a fixed rectangular graphic 282. The rectangular graphic 282 is displayed in blue, for example, when in manual mode, and in red, for example, when in automatic mode.

[0294] The rotation-related display (action-related display) 278 has a triangular figure 285, which is a fixed shape indicating the rotation direction of the embankment body 205, and a triangular figure 287, which is a fixed shape indicating the rotation direction of the embankment body 205. Note that between the two figures 285 and 287, the character 283 for "plowing depth" is positioned.

[0295] The triangular figure 285 on the right side is displayed, for example, in gray when the embankment 205 cannot be rotated downward, and is displayed, for example, in black when the embankment 205 can be rotated downward (a color that stands out more than the color when the embankment 205 cannot be moved, such as a dark color, is preferable).

[0296] In addition, the triangular figure 287 on the left side is displayed, for example, in gray when the embankment body 205 cannot be rotated upward, and is displayed, for example, in black when the embankment body 205 can be rotated upward (a color that stands out more than the color when the embankment body 205 cannot be moved, such as a dark color, is preferable).

[0297] The confirmation display 280 has a figure 291 whose shape changes in response to a change in position due to the vertical rotation of the embankment body 205 (a change in the vertical position of the embankment body based on the expansion and contraction of the second cylinder 212), a scale 292 whose shape does not change in response to a change in the position of the embankment body 205, a number 293 corresponding to this scale 292, and a rectangular figure 294 of a fixed shape that indicates the current setting value.

[0298] Then, for example, when the "Deep" button 234 is pressed and held, the embankment 205 is lowered to the tillage depth position corresponding to the set value, and as shown in Figure 18(c), a blue figure 291 is displayed extending to the right to the position of the figure 294 indicating the set value.

[0299] Thereafter, by operating the "shallow" button 233 or the "deep" button 234, the tilling depth position of the embankment 205 can be finely adjusted, and the moving edge 290 of the graphic 291 moves in accordance with this fine adjustment.

[0300] Therefore, with this ridge application machine 1a, as with the above-mentioned mowing machine 1, an operator riding, for example, on a tractor 2 can easily and accurately confirm the position of the working part 202 and the embankment body 205 simply by visually checking the figures 261, 291, etc. of the confirmation displays 250, 280 displayed on the display unit 221 of the remote control operating device 220 at hand, without having to look directly at the working part 6.

[0301] Next, still another embodiment of the present invention will be described with reference to FIGS.

[0302] Fig. 19 shows a plowshare 1b, an agricultural work machine, which is detachably connected to the rear of a tractor 2 and performs a predetermined task, plowing (land leveling), while moving forward (in the direction of travel) as the tractor 2 travels. The plowshare 1b can perform soil-pulling work by switching from a plowing state to a soil-pulling state.

[0303] The tiller 1b is detachably connected (mounted) to the three-point link at the rear of the tractor 2 and is equipped with a central working unit 301 which performs the tilling work, and left and right extension working units 302 which are rotatable in the vertical direction around axes 303 on both the left and right ends of the central working unit 301 and which can be changed into an unfolded state (open state) or a folded state (closed state) by this rotation, and which perform the tilling work in the unfolded state.

[0304] The central working unit 301 is made up of, for example, a central tilling body and a central soil leveling body, and has a central leveling plate 304 at its rear lower end. The extended working unit 302 is made up of, for example, an extended tilling body and an extended soil leveling body, and has an extended leveling plate 305 at its rear lower end. An extended rake 306 that can be changed between an unfolded state (open state) and a folded state (closed state) is rotatably provided at the outer end of the extended leveling plate 305.

[0305] The extension working unit 302 and the extension rake 306 can be opened and closed (positions can be changed) by the operation of a drive unit (not shown) controlled by a control unit 308. The control unit 308 is provided with a sound generating unit (e.g., a buzzer) 309.

[0306] Furthermore, the tiller 1b is provided with, for example, a remote control operation device 310 shown in FIG. 20 as a display device capable of communicating with the control unit (which may be the control unit of the tractor 2) 308.

[0307] As shown in Figure 20, the remote control operation device 310 has a display unit 311 that displays predetermined information based on information (signals) from the control unit 308, and an operation unit 312 that is pressed and operated by a worker (operator) sitting in the driver's seat of the tractor 2.

[0308] The display unit 311 is, for example, a liquid crystal color display provided at the top of the front side of the device body 313. The operation unit 312 is, for example, made up of a plurality of push buttons (switches) provided in a distributed manner on the front side of the device body 313.

[0309] Here, the operation unit 312 has a power button 316 , a decision button 317 , a display switching button (screen switching button) 318 , a mode switching button 319 , and a setting button 320 .

[0310] The display switching button 318 is a button for switching to one of an attitude angle confirmation screen (for example, the screen shown in FIG. 21(a)) for checking the vertical position (attitude angle) of the extension working unit 302 and a tillage depth confirmation screen (for example, the screen shown in FIG. 21(b)) for checking the tillage depth position (tillage depth amount) of the working units 301, 302. The setting button 320 is a button for switching to a setting mode for performing various settings. For example, in the setting mode, it is possible to set in advance the reference position of the tillage depth amount as a setting value. In addition, it is also possible to set the reference position of the tillage depth amount as a setting value by pressing and holding the enter button 317 while the tillage depth confirmation screen is displayed.

[0311] The operation unit 312 also has buttons related to the work units 301 and 302, such as a "close" button 321, an "open" button 322, a "pressure ON" button 323, a "pressure OFF" button 324, a "select right" button 325, and a "select left" button 326. The operation unit 312 also has buttons 327 to 330 related to the extension rake 306, and buttons 331 and 332 for switching between the plowing and soil-pulling states.

[0312] Next, Fig. 21 is a diagram showing screens displayed on the display unit 311 of the remote control operating device 310. The screen shown in Fig. 21(a) is a confirmation screen for the attitude angle, and the screen shown in Fig. 21(b) is a confirmation screen for the tilling depth.

[0313] The screen shown in Figure 21(a) has a first display portion 341 that displays a mode display 345, a radio wave status display 346, and a battery remaining capacity display 347, a second display portion 342 that displays a confirmation display 350 for checking the vertical position (posture angle) of the extension working section 302, and a third display portion 343 that displays a schematic diagram 349 showing the current state of the tiller 1b.

[0314] The background color of the first display portion 341 is, for example, gray, and the background colors of the second display portion 342 and the third display portion 343 are, for example, white.

[0315] The mode display 345 has characters 351 indicating the current mode (for example, black characters such as "NORMAL" or "AUTO") and a fixed rectangular graphic 352. The rectangular graphic 352 is displayed in blue, for example, in the manual mode, and in red, for example, in the automatic mode.

[0316] The schematic diagram 349 has a figure 353 that schematically shows the central working section 301, a figure 354 that schematically shows the extension working section 302, and a figure 355 that schematically shows the extension rake 306.

[0317] When the corresponding extension working unit 302 rotates upward and enters the folded state, the figures 354 and 355 are reduced in size and displayed on the figure (the shape-changed figure that has become a fan shape) 361. Also, as shown by the two-dot chain line in Figure 21(a), when the corresponding extension rake 306 enters the unfolded state, the figure 355 is displayed next to the figure 354 that has changed to a square shape on the third display portion 343.

[0318] The confirmation display 350 has a figure 361 whose shape changes in response to a change in position due to the vertical rotation of the extension working unit 302, a scale 362 whose shape does not change in response to a change in position of the extension working unit 302, and characters 363 that indicate the state of the extension working unit 302.

[0319] For example, if the "close" button 321 is pressed and held after the "select right" button 325 is operated, the right extension work unit 302 rotates to the folding position, and as shown in FIG. 21(a), the blue figure 361 changes shape to a fan shape in response to the rotation. At this time, the corresponding figures 354 and 355 on the right side rotate on the screen together with the rotation side 360 ​​of the figure 361. In the automatic mode, pressing the "close" button 321 once causes the right extension work unit 302 to operate in the same way, and the same screen is displayed on the display unit 311.

[0320] On the other hand, the screen shown in Figure 21 (b) has a first display portion 371 that displays a mode display 375, a radio wave status display 376, and a battery remaining capacity display 377, a second display portion 372 that displays the characters "Early" 378 and "Deep" 379, and a third display portion 373 that displays a confirmation display 380 for checking the current tillage depth position (tillage depth amount) of the working parts 301, 302.

[0321] The background color of the first display portion 371 is, for example, gray, the background color of the second display portion 372 is, for example, white, and the background color of the third display portion 373 is, for example, black.

[0322] The mode display 375 has characters 381 indicating the current mode (for example, black characters such as "NORMAL" or "AUTO") and a fixed rectangular graphic 382. The rectangular graphic 382 is displayed in blue, for example, in the manual mode, and in red, for example, in the automatic mode.

[0323] The confirmation display 380 has a figure 391 whose shape changes in response to a change in position due to the raising and lowering of the working parts 301, 302 (raising and lowering of the entire agricultural work machine) based on the operation of the hydraulic three-point linkage of the tractor 2, a scale 392 whose shape does not change in response to a change in position of the working parts 301, 302, and numbers 393 corresponding to this scale 392.

[0324] Then, when a detector such as an inclination sensor detects that working units 301, 302 have risen from their reference positions based on the operation of the three-point linkage by, for example, operating a control lever, blue figure 391 is displayed extending to the right, as shown in Figure 21(b). In other words, as the positions of working units 301, 302 change, moving edge 390 of blue figure 391 moves on the screen.

[0325] Therefore, in this tiller 1b, as in the above-mentioned mowing machine 1, an operator riding on, for example, the tractor 2 can easily and accurately confirm the position of the working parts 301, 302 simply by visually checking the figures 361, 391, etc. of the confirmation displays 350, 380 displayed on the display unit 311 of the remote control operating device 310 at hand, without having to look directly at the working parts 301, 302.

[0326] In all of the above-mentioned embodiments, the confirmation display for checking the current position displayed on the display unit has at least a figure whose shape changes in response to a change in the position of the working unit and a scale whose shape does not change in response to a change in the position of the working unit, but this is not limited to this, and it may also be, for example, a display consisting only of a figure whose shape changes in response to a change in the position of the working unit and whose color changes when the working unit reaches a predetermined position.

[0327] Furthermore, in any of the embodiments, it is preferable that the confirmation display graphic be configured to have a different display mode when the working unit is located at a predetermined position and when it is located at a position other than the predetermined position, that is, for example, be configured to be displayed in one color until the working unit reaches the predetermined position, and then be displayed in a flashing color different from the one color when the working unit reaches the predetermined position, but this is not limited to this, and the different display modes may be, for example, reverse display, enlarged display, highlighted display, etc., and are arbitrary.

[0328] Furthermore, agricultural machines equipped with position-adjustable working units are not limited to the above-mentioned mowing machines, ridgers, and harrows, but may also be any machine, such as a rotary, spreader, harvester, etc.

[0329] In addition, the display device such as a remote control operation device used in the agricultural machinery may be equipped with a touch panel display unit (touch panel unit) that can be operated by touch by the worker, or may be a terminal device such as a color LCD monitor installed on the tractor or a mobile terminal (smartphone) with a specified app downloaded.

[0330] Although several embodiments and modifications of the present invention have been described, it is also possible to combine the embodiments and modifications as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0331] 1. Grass cutting machine, which is an agricultural machine 1a Agricultural machinery: a ridge-painting machine 1b Agricultural machinery: a plow 2 Tractor as a traveling vehicle 6 Working section 8 Remote control operation device as a display device 111 Display section 140,170 confirmation display 151,181 shapes 156 Moving Edge 184 Rotating edge 186 Horizontal position marking line 187 Marking line for maximum upward tilt position 188 Marking line for maximum downward tilt posture 202 Working Section 220 Remote control device as a display device 221 Display section 250,280 confirmation display 260,290 moving side 261,291 figures 301 Central Working Section (Working Section) 302 Extension work section (work section) 310 Remote control operation device as a display device 311 Display section 350,380 confirmation display 360 Rotating edge 361,391 shapes 390 Moving Side

Claims

1. A display device used in an agricultural work machine having a position-changeable working unit, a display unit that displays a confirmation display for confirming the position of the working unit; The confirmation display has a graphic that changes shape in response to a change in the position of the working unit. A display device characterized by:

2. A display device used in an agricultural work machine having a position-changeable working unit, a display unit that displays a confirmation display for confirming the position of the working unit; The confirmation display has a graphic that changes shape in response to a change in the position of the working unit and changes color when the working unit reaches a predetermined position. A display device characterized by:

3. The confirmation display graphic is displayed in different ways depending on whether the working unit is located at a predetermined position or not.

3. The display device according to claim 1 or 2.

4. The confirmation display shape is The display is in one display mode until the working unit reaches the predetermined position, When the working unit reaches the predetermined position, the working unit is displayed in a different display mode from the one display mode.

3. The display device according to claim 1 or 2.

5. The confirmation display shape is The light will be in one color until the workpiece reaches the designated position. When the working unit reaches the predetermined position, the color different from the one color is flashed.

3. The display device according to claim 1 or 2.

6. The figure of the confirmation display has a moving side that moves in accordance with the movement of the working unit that can move in the left and right direction.

3. The display device according to claim 1 or 2.

7. The figure of the confirmation display has a rotation side that rotates in accordance with the rotation of the working unit that can rotate in the vertical direction.

3. The display device according to claim 1 or 2.

8. The confirmation display is a mark line for a horizontal position that coincides with the rotation side when the working unit is in a horizontal position; a mark line for a maximum upward tilt position that coincides with the rotation side when the working unit is in a maximum upward tilt position and is positioned at a maximum upward tilt position; a mark line for a maximum downward tilt position that coincides with the rotation side when the working unit is in a maximum downward tilt position; 8. The display device according to claim 7.

9. The rotation side of the confirmation mark changes its length while rotating around the intersection of three lines consisting of the horizontal position mark line, the maximum upward tilt position mark line, and the maximum downward tilt position mark line.

9. The display device according to claim 8.

10. The display is When the position of the working unit is changed by moving it in the left or right direction, a confirmation display is displayed to confirm the left or right position of the working unit; When the position of the working unit is changed by rotating it up or down, a confirmation display is displayed to confirm the up or down position of the working unit.

3. The display device according to claim 1 or 2.

11. An agricultural work machine used by being coupled to a traveling vehicle, A positionable working unit; 3. The display device according to claim 1, further comprising a display unit that displays a confirmation display for confirming the position of the working unit. An agricultural machine characterized by comprising:

12. The display device is a remote control device for remotely operating the working unit.

12. The agricultural implement according to claim 11.

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