JP2015160596A - work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display operation information of a work vehicle by effectively using a given electronic display space.SOLUTION: In the work vehicle, a meter panel 27 and a switching operation tool 130 are provided in an operation part formed in a traveling vehicle body using an internal combustion engine as a power source, and a multi-functional display area 9 is disposed in the meter panel 27. The work vehicle includes a display switch part 56 for selectably displaying a coolant temperature in the internal combustion engine and a function state other than the coolant temperature in the multi-functional display area 9 based on an operation with respect to the switching operation tool 130.

Description

  The present invention relates to a work vehicle that uses an internal combustion engine as a drive source and displays operation information on a meter panel.

  In order to satisfy the demand for more economical operation of work vehicles, not only the rated output of an internal combustion engine such as a gasoline engine mounted on the work vehicle is reduced, but also fuel consumption must be considered when driving by the driver. Has been. For such a lean operation of the work vehicle, it is important that the driver can grasp driving information such as the remaining fuel amount, cooling water temperature and hydraulic pressure in a timely manner.

  For example, in a work vehicle according to Patent Document 1, a meter panel provided at a lower front position of a steering wheel includes a tachometer, a fuel meter that displays a remaining amount of fuel, a water temperature meter that displays a temperature of engine cooling water, and A liquid crystal display unit is arranged. The liquid crystal display section includes a segment-type main shift speed display area for displaying the shift speed of the main transmission, a segment-type sub shift display area for displaying the shift speed of the sub-transmission, and a forward / reverse switching device. A segment-type forward / backward display area for displaying the character in the state, a segment-type height display area for displaying the vertical swing angle of the lift arm as the height of the work device, and a segment-type information display area are arranged. . In the information display area, various information such as the total operating time of the engine, the operating time after reset, and the instantaneous fuel consumption are selectively displayed in characters. This meter panel is convenient because it displays almost all the information needed to drive a work vehicle, but is therefore useful for the meter panel, such as in the area around a steering wheel where space is limited. The inconvenience arises that considerable space must be allocated.

  The display device for a work vehicle according to Patent Document 2 includes a liquid crystal display screen having a plurality of display locations, and an engine water temperature display gauge, a hydraulic oil temperature display gauge, and a fuel remaining amount display gauge are assigned to each display location. It has been. Here, when some abnormality occurs in the work vehicle, for example, when the voltage of the battery decreases, the hydraulic oil temperature display gauge is in a non-display state, and a battery warning mark is lit on the display location. The information on the abnormality that occurred is displayed instead of the constantly displayed information, so that the display screen is used effectively. However, the fuel remaining amount display gauge and the engine water temperature display gauge that occupy a large display space are always displayed. Therefore, effective use of the liquid crystal display screen is still insufficient.

JP 2010-172267 A (FIGS. 2, 3, and 4) JP 2012-72653 A (FIGS. 1 and 2)

  In view of the above circumstances, it is desired to display driving information on a work vehicle by effectively using a given display space.

  A work vehicle according to the present invention includes a traveling vehicle body using an internal combustion engine as a power source, a driving unit formed in the traveling vehicle body, a meter panel provided in the driving unit, and a switching operation tool provided in the driving unit. And a multifunction display area arranged on the meter panel, and a coolant temperature in the internal combustion engine and a functional state other than the coolant temperature are selected in the multifunction display area based on an operation on the switching operation tool. And a display switching unit for displaying automatically.

  In this configuration, the coolant temperature in the internal combustion engine and the functional state other than the coolant temperature can be selectively displayed in the multi-function display area assigned to the meter panel. Furthermore, the display content displayed in the multi-function display area can be selected from a plurality of display contents based on an operation on the switching operation tool. Limited display on the meter panel by assigning a multi-function display area that can selectively display multiple function status information including at least the coolant temperature to the meter panel that has a limited area used for display Space can be used effectively.

  The coolant temperature and other functional states (for example, engine oil pressure, battery charge, remaining fuel level, etc.) fluctuate within a predetermined range, so that the fluctuation can be visually recognized. Is advantageous in a stepwise display form such as a graph. Accordingly, in one of the preferred embodiments of the present invention, the multi-function display area includes a plurality of electronic display fixing segments that are commonly used when displaying the coolant temperature and the function state in stages. ing. Thereby, the function state displayed in the multi-function display area can be grasped as the current position within a predetermined range that can be taken. At that time, if marks indicating the upper and lower limits of the coolant temperature and the functional state are provided around both ends of the plurality of electronic display fixing segments in the meter panel, the plurality of electronic display fixing segments are stepwise. Since the range that can be taken by the function state displayed in is clearly indicated, the function state can be easily grasped. In the multi-function display area, a plurality of functional states including the coolant temperature are selectively displayed. Therefore, in order to clarify the upper limit and the lower limit of the functional state that is selected and displayed, in one of the preferred embodiments of the present invention, marks indicating the upper limit and the lower limit of the functional state that is the display target are symbols. The electronic display fixed segment is displayed so that display / non-display control is possible, and marks indicating the upper and lower limits of the coolant temperature are always displayed on the meter panel.

  As the coolant temperature rises and falls as time passes, it becomes a problem when the coolant temperature rises. For this reason, it is convenient to turn on the corresponding segment earlier when the liquid temperature rises and turn off the light later when the liquid temperature falls. Therefore, in one of the preferred embodiments of the present invention, in the stage display of the coolant temperature, the display trigger temperature of each stage displayed when the temperature rises is not displayed when the temperature falls. It is set lower than the stage hidden trigger temperature.

  A typical function state that frequently fluctuates to a certain level that needs to be alerted to the driver is the coolant temperature. Therefore, it is important for the work vehicle to raise the temperature of the coolant, and to alert the driver with a form other than the display form that is always performed. In particular, this is necessary in such a form that the coolant temperature and other functional states are selectively displayed in the multi-function display area. For this reason, in one of the preferred embodiments of the present invention, a state abnormality notification that issues a coolant temperature warning when the coolant temperature is abnormal and performs a function state abnormality warning when a function state other than the coolant temperature is abnormal. Department is provided. Furthermore, if the meter panel is intended to be used efficiently, a warning regarding a function state other than the coolant temperature is provided by flashing the electronic display fixed segment, and the coolant temperature warning is disposed on the meter panel. This is preferably done by a warning light.

  In particular, if the remaining fuel amount of the internal combustion engine is adopted as a functional state other than the coolant temperature, which can be selectively displayed in a multi-function display area, a display conventionally assigned for displaying the remaining fuel amount is used. The area can be used to indicate the state of the coolant temperature, which is meaningful for the effective use of a given electronic display space.

  The switching operation tool used for selecting whether the multifunction display area is set to the coolant temperature or to a function state other than the coolant temperature according to the driver's intention is often operated during driving. For this reason, in a preferred embodiment of the present invention, the operating unit is formed in the operating cabin, the meter panel is arranged on the upper part of the operating cabin, and the switching operation tool is arranged on the control device. In consideration of the operability and space saving of the switching operation tool, it is advantageous to configure the switching operation tool with a switch rather than with a lever. Further, each time the switch is operated, the operation becomes easy when the display mode is switched. For this reason, in one preferred embodiment of the present invention, the switching operation tool is a momentary switch, and every time the momentary switch is operated, the multi-function display area includes the coolant temperature and the coolant temperature other than the coolant temperature. The function state is selectively displayed.

It is a schematic diagram explaining the fundamental structure regarding the information display in a meter panel in this invention. It is a left view of the combine which is one of the specific embodiment of the working vehicle by this invention. It is a top view which shows the whole combine. It is a right view which shows the whole combine. It is a front view which shows an operation part. It is a top view which shows an operation part. It is a side view which shows an operation part. It is a side view which shows arrangement | positioning of an upper headlamp and a meter panel. It is a top view which shows an operation panel. It is the perspective view which looked at the field in which the meter panel and the sun visor were provided from the cabin inside. It is a front view of a meter panel, (a) shows the whole meter panel, (b) expands and shows the multifunctional display area of a meter panel. It is a vertical side view which shows the lower back area | region of the driving | running | working part provided with the control apparatus. It is a functional block diagram of the control unit which displays information on a multifunction display area. It is a time chart figure which shows an example of the information display in a multifunctional display area. It is a time chart figure which shows an example of the information display in a multifunctional display area. It is a side view of the combine for rice and wheat which is another one of the specific embodiments of the work vehicle by the present invention.

  Before describing a specific embodiment of the working machine according to the present invention, a basic configuration characterizing the present invention will be described with reference to FIG. FIG. 1 illustrates the basic principle of information display in the multi-function display area 9 provided on the meter panel 27 provided in the work vehicle. The meter panel 27 of the work vehicle generally includes an operating time of an internal combustion engine (diesel engine, gas engine, gasoline engine, etc .: hereinafter referred to as an engine), engine speed, travel distance, direction indication, fuel remaining amount. , Digital display or analog display such as engine coolant temperature (coolant temperature), traveling speed, work machine speed, and other warnings such as battery warning light, brake warning light, hydraulic pressure warning light, fuel level warning light, etc. An indicator light section is arranged. However, since the space provided for the meter panel 27 is limited, it is difficult to assign the display of all information deemed necessary for the driver to the display surface of the meter panel 27. For this reason, in the work vehicle of the present invention, the multi-function display area 9 is allocated to one place of the meter panel 27, and a flat panel such as a liquid crystal panel or an organic panel occupies most of the area.

  In the example of FIG. 1, in the multifunction display area 9 in the present invention, as a function state (state of the specific function unit) other than the coolant temperature, which is selectively displayed as the engine coolant temperature (coolant temperature), The remaining amount of fuel in the engine is used. Although not illustrated here, as other functional states, the engine hydraulic pressure, the traveling speed, the work machine speed, etc. are adopted as the functional states that are selectively displayed in the multi-function display area 9 as the coolant temperature. May be. Further, functional states other than the remaining amount of fuel and the coolant temperature may be added as those that can be selectively displayed in the multi-function display area 9. That is, the function states displayed in the multi-function display area 9 are not limited to two.

  The operation state data including detection signals from the fuel remaining amount sensor for detecting the remaining amount of fuel and the coolant temperature sensor for detecting the temperature of the coolant are used for displaying the fuel remaining amount and the coolant temperature in the multi-function display area 9. The display control signal (display data) is generated through the display control signal generator 54.

  The display switching unit 56 for controlling the display of the remaining amount of fuel in place of the coolant temperature in the multi-function display area 9 and the display of the coolant temperature in place of the remaining amount of fuel is provided in a switching operation tool 130 by the driver. Operation input data generated by the operation is input. As the switching operation tool 130, an appropriate one is selected from a lever type, a button type, a dial type, and the like, but a momentary switch type push button is preferable. If the momentary switch is employed, the display of the coolant temperature and the remaining fuel amount is switched each time the button is pushed, so that a quick operation is possible. Further, if a mode in which a momentary switch is provided in the grip of the other operation lever or the operation dial is adopted, there is an advantage that display switching can be performed while performing other operations. The display switching unit 56 instructs the display control signal generation unit 54 of state information to be displayed in the multi-function display area 9 based on the received operation input data.

  Furthermore, when the evaluation unit 52 to which the operation state data is given is provided, the evaluation unit 52 can determine whether or not the state of the specific functional unit is abnormal from the operation state data. For example, based on the detection signal from the temperature sensor that detects the coolant temperature, which is one of the operating state data, and the detection signal from the fuel remaining amount sensor, the evaluation unit 52 determines whether the coolant temperature is approaching the dangerous temperature. Alternatively, it is determined whether or not the remaining amount of fuel is below a predetermined amount. The evaluation unit 52 instructs the display control signal generation unit 54 to display the remaining fuel amount so that the remaining fuel amount is forcibly displayed in the multi-function display area 9 when the remaining fuel amount is below a predetermined amount. Can be given.

  When it is determined from the received operation state data that the state of the functional unit that is the evaluation target is abnormal, the evaluation unit 52 sends the evaluation result to the state abnormality notification unit 53, and the abnormality of the functional unit that is the evaluation target To let you know. As a form of this notification, there are an auditory warning including a warning sound or warning sound from a buzzer or a speaker, and a visual warning including lighting or blinking of a warning or display of a warning message.

  In the example of FIG. 1, the display of the remaining fuel amount and the coolant temperature uses an electronic display fixed segment that can display the current state step by step like a horizontal bar graph. However, an arc scale or a linear scale is used. Other electronic display forms such as a meter display may be employed. Here, the remaining fuel index (characters representing the fuel tank and remaining fuel) can be displayed and controlled, that is, can be turned on or off, but the coolant temperature index (liquid temperature illustration or The pictograph indicating the liquid temperature is permanently displayed by marking on the panel surface, attaching a printing sticker, or mounting a translucent or transparent printing board with a backlight. When displaying the remaining fuel amount, the remaining fuel indicator is turned on. Since the indicator display that is controlled to light up gives a stronger stimulus than the display such as printing, the presence of the coolant temperature indicator fades when the fuel remaining amount indicator is lit. Can be easily recognized. Conversely, when displaying the coolant temperature, the remaining fuel index is turned off. As a result, the remaining fuel index becomes difficult to see, and the driver can easily recognize from the coolant temperature index that the display information is the coolant temperature.

  The warning light flashes when the coolant temperature or the remaining fuel level reaches a dangerous level. The form of the warning light may be dedicated, or at least a part of the electronic display fixed segment may blink. This warning may be canceled after the elapse of a predetermined time, or may be canceled by other operation input, for example, operation of the switching operation tool 130.

  Next, one specific embodiment of the work vehicle according to the present invention will be described with reference to the drawings. 2 is a left side view of a corn combine that is an example of a work vehicle, FIG. 3 is a plan view, and FIG. 4 is a right side view. The combine includes a traveling vehicle body configured to self-propelled by a pair of left and right driveable front wheels 1 and a pair of left and right steerable rear wheels 2, and a harvesting device 6 connected to a front portion of the traveling vehicle body. The harvest collection tank 7 provided at the rear part of the traveling vehicle body, the transfer device 8 provided over the rear part of the harvesting device 6 and the upper part of the harvest collection tank 7, and the part between the front and rear wheels of the traveling vehicle body can be raised and lowered freely. And a supported shredding device 80. Furthermore, this combine employ | adopts the basic principle regarding the driving | running state display in a panel meter demonstrated using FIG.

  The engine 4 is provided between the front wheel 1 and the rear wheel 2, and outputs the driving force of each of the front wheel 1, the harvesting device 6, and the transport device 8. The driving unit 3 is provided in the front part of the vehicle body and is covered with the driving cabin 30. The harvesting device 6 is moved up and down by the lifting cylinder 5 into a lowering work state in which the tip end side of the divider 11 is lowered near the farm scene and an ascending non-working state in which the tip end side of the divider 11 is raised from the farm scene.

  When the traveling vehicle body travels while the harvesting device 6 is in the descending work state, the harvesting device 6 harvests the corn (the part in which the seeds are connected in a rod shape to form a tuft) of the corn plant body. The corn harvested by the harvesting device 6 is transported to the rear side of the traveling vehicle body by the transport device 8, and the corn from the transport device 8 is collected in the harvest collection tank 7 and stored there. The harvesting device 6 leaves the stalks obtained by harvesting the corn out of the corn plants in the field. The shredding device 80 shreds the stalks left in the field by the harvesting device 6 and releases them to the field. The conveying device 8 is disposed so as to pass below the operation cabin 30.

  As shown in FIG. 3, the harvesting device 6 is provided in three rows of harvesting paths 12 and on the rear side of the harvesting path 12 so as to be driven to rotate, and conveys corn from each harvesting path 12 in the lateral direction of the traveling vehicle body. The rotating auger 14 gathered in front of the conveying device 8 and a scraper blade 15 which is provided so as to be integrally rotatable at a portion between the left and right spiral conveying plates 14a of the rotating auger 14 and rakes corn into the inlet of the conveying device 8. And. Each harvesting path 12 is provided with an endless rotating harvesting chain 16 provided on both sides so as to be driven to rotate, and provided below the endless rotating harvesting chain 16 so as to be able to be driven to rotate about an axial center in the front-rear direction of the traveling vehicle body. The harvesting roll 16a is provided, and the endless rotating harvesting chain 16 and the harvesting roll 16a are used to move the corn plant fed from the divider 11 backward while harvesting the corn out of the corn plant from the stem culm. To do.

  As is apparent from FIGS. 2, 3, and 4, the harvest collection tank (hereinafter abbreviated as a collection tank) 7 is a lifting cylinder 17 (FIG. 3) connected to the front and rear tank columns 18 and the collection tank 7. Thus, the swinging posture can be switched between the storage posture and the discharging posture around the swinging shaft center facing the traveling vehicle body. When the collection tank 7 is switched to the storage posture, the corn inlet / outlet 7a provided at the upper end of the collection tank 7 is located below the discharge port of the conveying device 8 and upwards of the traveling vehicle body, and the corn fed from the conveying device 8 is Collect and store. When the recovery tank 7 is switched to the discharge posture, the corn entrance / exit 7a turns to the left side outward of the traveling vehicle body, and the stored corn is discharged from the corn entrance / exit 7a to the left lateral outside of the traveling vehicle body by natural fall.

  As can be understood from FIGS. 2 to 5, the driving cabin 30 includes a cabin frame 40 (FIG. 5) supported by a driving unit support frame 10 a provided at a front portion of the vehicle body frame 10 constituting the traveling vehicle body, and a cabin. A front wall portion 31 supported by the frame 40, left and right lateral wall portions 32, a rear wall portion 33, a floor portion 34, and a roof portion 35 are provided.

  As shown in FIG. 5, the windshield 31a is supported by a lower frame 41 extending horizontally and a pair of left and right vertical frames 42 extending vertically. A cabin frame 40 is constructed by the lower frame 41 and the vertical frame 42. The lower frame 41 is provided on the lower side of the front end side of the driving cabin 30 in the lateral direction of the traveling vehicle body, and is supported by the vertical frame 42. The horizontally oriented lower frame 41 is supported vertically on the traveling vehicle body at both lateral ends on the front end side of the driving cabin 30.

  As shown in FIGS. 2 and 5, a pair of left and right upper headlamps 46 and a pair of left and right work lights 47 are provided on the upper end side of the front portion of the operation cabin 30. Work lights 47 are also provided on both sides of the upper end of the driving cabin 30. Four lower headlamps 48 are provided on the lower end side of the front portion of the operation cabin 30. As shown in FIG. 6, a rear work lamp 49 is provided at the rear of the driving cabin 30.

  The driving unit 3 will be described with reference to FIGS. 5 and 6. FIG. 5 is a front view showing the driving unit 3. FIG. 6 is a plan view showing the operation unit 3. As shown in FIG. 5 and FIG. 6, the driving unit 3 includes a driving seat 20 provided in the center of the driving cabin 30 in the lateral direction of the traveling vehicle body, and a side panel provided on the right side of the driving seat 20. 21, a control tower 22 provided in front of the driver's seat 20, a steering wheel 23 supported by the control tower 22, a driver seat 20, and a passage portion 24 provided in front of the side panel 21. A brake pedal 25 and an accelerator pedal 26 are provided on the right side of the control tower 22. In front of the driver's seat 20, a meter panel 27 and a sun visor 28 are disposed above the passage portion 24. A pair of left and right footrests 29 are provided in front of the driver seat 20.

  The steering wheel 23 supported by the control tower 22 can be rotated by the control tower 22 via a handle shaft (not shown). The steering wheel 23 is linked to an operation valve of a steering cylinder incorporated in the steering mechanism of the pair of left and right rear wheels 2. When the steering wheel 23 is rotated, the steering cylinder is driven and the left and right rear wheels 2 are steered.

  As shown in FIGS. 5 and 7, a main transmission operation tool 75, an accelerator operation tool 76, an auxiliary transmission operation tool 77, and a work clutch operation tool 78 are arranged on the side panel 21. The main transmission operation tool 75 and the accelerator operation tool 76 are disposed in the vehicle body front side region 21F (part near the front end) of the side panel 21. The main transmission operating tool 75 is provided in a portion near the driver seat in the vehicle body front side region 21F of the side panel 21, and the accelerator operation tool 76 is the main transmission operation tool 75 in the vehicle body front side region 21F of the side panel 21. Is disposed in a region opposite to the side where the driver seat 20 is located.

  The sub-transmission operation tool 77 and the work clutch operation tool 78 are disposed in a portion of the side panel 21 that is located behind the main transmission operation tool 75. The auxiliary transmission operation tool 77 and the work clutch operation tool 78 are disposed in the vehicle body rear side region 21 </ b> R in the side panel 21. The work clutch operating tool 78 is disposed in a portion of the side panel 21 in the vehicle body rear side region 21R opposite to the side where the driver seat 20 is located with respect to the auxiliary transmission operating tool 77.

  The main transmission operation tool 75 is linked to a transmission operation unit of a continuously variable transmission provided in the front wheel drive device 82 (see FIG. 4). The main transmission operating tool 75 is guided by a lever guide provided in the inside of the side case 70 and the side panel 21 and is operated to swing in the longitudinal direction of the traveling vehicle body, thereby changing the speed of the continuously variable transmission. The pair of left and right front wheels 1, 1 are switched between a forward side and a reverse side, and are operated to drive, and the forward and backward drive speeds of the pair of left and right front wheels 1, 1 are steplessly changed.

  As shown in FIG. 7, the upper surface of the vehicle body rear side region 21R of the side panel 21 where the work clutch operating tool 78 is provided is set higher than the upper surface of the vehicle body front side region 21F. The work clutch operating tool 78 is configured such that the grip portion 78a is positioned above the traveling vehicle body front side region 21F of the side panel 21 when the swing operation is performed on the vehicle body front side.

  As shown in FIGS. 5 and 6, the pair of left and right footrests 29 are arranged so as to be located one by one on both lateral sides of the control tower 22. The left and right footrests 29 are used when the driver seated on the driver's seat 20 takes a forward bending posture, thereby making it easier to take a forward bending posture by applying a strut. The left and right footrests 29 are configured by rod members formed in a U-shape that opens downward.

  As shown in FIGS. 7 and 9, an operation panel 120 is provided on the upper portion of the control tower 22. The operation panel 120 is provided with a switch group including a main switch 121, a horn switch 122, a direction indicator lamp switch 123, and a headlamp switch 124. An extension 120a extending to the vicinity of the lower part of the outer periphery of the steering wheel 23 in a top view is provided at a portion of the driving panel 120 opposite to the side where the main transmission operating tool 75 is located with respect to the handle shaft 23a. It is provided. A direction indicator lamp switch 123 and a headlamp switch 124 are provided in the extending portion 120a. Further, a switching operation tool 130 configured as a momentary switch in this embodiment is provided on the side opposite to the horn switch 122.

  The main switch 121 is operated by inserting an engine key to drive the engine starter device and start the engine 4. The direction indicator lamp switch 123 and the headlamp switch 124 are configured by combination switches. When the direction indicator lamp switch 123 is switched by a swing operation of the operation lever 123a, the direction indicator lamp corresponding to the operation direction of the operation lever 123a is turned on among the left and right direction indicator lights.

  As shown in FIGS. 8 and 10, the sun visor 28 is provided inside the upper end portion of the front wall portion 31 and supported by the upper frame 43. The sun visor 28 can be switched between a lowered use posture and a raised storage posture by swinging up and down around the axis of the support shaft 28a. A meter panel 27 is provided in the upper end region of the front wall portion 31 of the operation cabin 30 in the operation cabin.

  The meter panel 27 is located above the upper end of the windshield 31 a that constitutes the front wall portion 31 of the operation cabin 30. The meter panel 27 is biased to the right lateral outer side of the traveling vehicle body with respect to the lateral center C of the driving cabin 30. The direction in which the meter panel 27 is deviated from the traveling vehicle lateral center C (see FIG. 5) of the driving cabin 30 is deviated from the traveling vehicle lateral center C of the driving cabin 30. The direction is opposite to the direction. The meter panel 27 is biased toward the side where the main transmission operating tool 75 of the driving seat 20 is located with respect to the center C of the driving cabin 30 in the lateral direction of the traveling vehicle body.

  FIG. 11 is a front view of the meter panel 27. 11A shows the entire meter panel 27, and FIG. 11B shows an enlarged area of the liquid crystal display unit 90. The meter panel 27 includes a liquid crystal display unit 90 that occupies most of the multifunction display area 9 of the present invention, and a liquid temperature indicator region 91 that is a part above the multifunction display area 9, and further includes an engine. A rotation meter portion 92 for displaying the number of rotations of 4, a warning lamp area 93 for warning of abnormality in the engine operating state, and direction indication lamps 94 and 95 are also arranged. In addition, since the meter panel 27 is disposed at a position that can be visually recognized by the driver's upper eyes using the driver's seat 20, the arc-shaped scale frame 92 a and the pointer 92 b constituting the rotation meter unit 92 are seated on the driver's seat 20. It has a three-dimensional shape that has a facing surface facing the driver.

  The liquid crystal display unit 90 is arranged in accordance with the opening so as to be retracted from the opening provided on the panel surface of the meter panel 27. In other words, the liquid crystal display surface of the liquid crystal display unit 90 is deeper than the panel surface, so that the liquid crystal display surface is partially behind the panel surface, and the difficulty in viewing due to reflection of external light is improved. .

  The liquid crystal display unit 90 is divided into two upper and lower regions. In the upper display area, an identification mark for the remaining amount of fuel (here, an illustration of a gas station refueling machine) 101, an identification mark for representing an empty state of fuel (here, the letter “E”) 102, and the state in stages Five segments 103 to 107 having different heights for identification, and identification marks (herein, the letter “F”) 108 indicating fuel fullness are arranged side by side in this order. Display control such as blinking is possible. In the lower display area, an engine operating time identification mark 111, an engine operating time 4 digits + a segment 112 to be displayed at the first decimal place, and an identification mark (in this case, the English letter “HR”) 113 Are arranged side by side in this order.

  Furthermore, the liquid temperature index area 91 is located immediately adjacent to the upper end of the liquid crystal display unit 90, that is, immediately above the upper display area, and permanently indicates an index related to the engine coolant temperature. The liquid temperature indicator area 91 includes an identification mark (English letter “C” here) 911 indicating a low temperature of the engine coolant, a liquid temperature scale bar 912, a mark (here red label) 913 indicating an abnormality of the coolant, engine An identification mark (in this case, an English letter “H”) 914 indicating the high temperature of the coolant is provided in this order in the form of a print sticker or a stamp. As another embodiment, the liquid temperature indicator region 91 is made of a transparent or translucent material, and at least a part of the identification mark 911, the liquid temperature scale bar 912, the mark 913, and the identification mark 914 provided thereon can be controlled to be lit. It may be made to emerge with a simple backlight.

  As is clear from FIG. 11B, an identification mark 101 indicating the remaining amount of fuel and an identification mark 102 indicating the low temperature of the engine coolant are positioned immediately above the identification mark 102 indicating the empty state of the fuel, and the state is stepwise. The mark 913 which is a red label representing the abnormality of the liquid temperature scale bar 912 and the cooling liquid is positioned directly above the five fixed segment groups 103 to 107 having different heights for identification as shown in FIG. An identification mark 914 indicating the high temperature of the coolant is located immediately above the mark 108. Therefore, the five segments 103 to 107 having different heights constituting the fixed segment group in the upper display area of the liquid crystal display unit 90 can be used as the stage display liquid crystal segment indicating the state of the coolant.

  Actually, when the fixed segment groups 103 to 107 are used as the stage display liquid crystal segments indicating the state of the coolant, the remaining fuel identification mark 101, the fuel empty identification mark 102, and the fuel full state are displayed. All the identification marks 108 to be displayed are turned off. Thereby, the lit segments 103 to 107 appear to indicate the liquid temperature state of the coolant. That is, the segments 103 to 107 of the liquid crystal display unit 90 can display the states of the two functional units.

  A decrease in the remaining amount of fuel is an event that should be noted, while an increase in the liquid temperature is an event that should be noted. In consideration of this, the remaining fuel level identifying mark 101 for the segments 103 to 107 for stage display and the mark 913 expressing the abnormality of the coolant are arranged. That is, the fuel remaining amount identification mark 101 is positioned on the extension in the decreasing direction of the segments 103 to 107, and more specifically, the identification mark 101 is an identification representing the empty state of the fuel on the segment 103 side indicating the minimum level. It is located with the mark 102 in between. On the other hand, the mark 913 which is a red label expressing the abnormality of the coolant is located near the increasing direction region of the segments 103 to 107, that is, almost directly above the segment 107 indicating the highest level of the liquid temperature. . This is an ergonomic arrangement in order to make the driver more aware of the decrease in the remaining fuel and the increase in the liquid temperature.

  Further, the warning light area 93 includes a liquid temperature warning light 93a for issuing a warning about the engine coolant temperature, a battery warning light 93b for giving a warning about charging of the battery, and a hydraulic pressure warning light 93c for giving a warning about hydraulic pressure. They are arranged side by side.

  Since the fluctuation of the remaining amount of fuel is a monotonous phenomenon that decreases with time, only the specific segment 103 to 107 corresponding to the threshold value set for each display stage is compared with the measured value of the remaining amount. Control to turn on is used. Further, in the stepwise display of the liquid temperature of the cooling liquid that increases and decreases with the passage of time, it is used in the threshold value for lighting each segment 103 to 107 used in the increasing direction of the liquid temperature and in the decreasing direction of the liquid temperature. Display control having a so-called hysteris, which is different from the threshold value for lighting each of the segments 103 to 107, is employed. Specifically, the display trigger temperature of each stage displayed when the temperature rises is set lower than the non-display trigger temperature of each stage that is hidden when the temperature falls. For example, in the middle segment 105, when the measured liquid temperature exceeds 80 ° C. (rising threshold) when the temperature rises, a lighting command for the segment 105 is triggered, and when the temperature falls, the measured liquid temperature becomes 75 ° (falling threshold). ), A turn-off command for the segment 105 is triggered. As a result, the segments 103 to 107 are turned on at an earlier timing when the temperature rises in question, and are turned off at a later timing when the temperature falls.

  The lighting control of the liquid temperature warning lamp 93a arranged in the warning lamp area 93 is as follows. Although the liquid temperature warning threshold value for the engine coolant temperature is set, in this embodiment, as the liquid temperature warning threshold value, the ON threshold value used when the warning is ON and the OFF threshold value used when the warning is OFF Is set, and the ON threshold value is lower than the OFF threshold value. Of course, as another embodiment, the ON threshold value may be the same as the OFF threshold value. When the liquid temperature rises and exceeds the ON threshold value, the liquid temperature warning lamp 93a flashes or lights up and a warning buzzer is also emitted. In the basic control flow, when the liquid temperature subsequently falls and falls below the OFF threshold, the liquid temperature warning lamp 93a is turned off and the warning buzzer stops sounding. In this embodiment, The liquid temperature warning lamp 93a is turned off and the warning buzzer is stopped using a delay function. That is, after the liquid temperature falls below the OFF threshold, the liquid temperature warning lamp 93a is turned off and the warning buzzer is stopped for a predetermined delay time (about 1 to several seconds). Furthermore, when the liquid temperature fluctuates up and down within the delay time, the delay of the predetermined delay time is started again when the liquid temperature falls below the OFF threshold again. Note that this delay control may be employed only for either the extinction control of the liquid temperature warning lamp 93a or the stop control of the warning buzzer.

  As shown in FIGS. 5 and 6, a control box CB is provided on the side case 70 opposite to the side where the driver seat 20 is located. Specifically, as shown in FIG. 12, the control box CB is supported by a support base 38 a at a corner portion 38 formed by the floor portion 34 and the rear wall portion 33, and inside the operation portion of the control box CB. This area is covered with a cover 38b. The support base 38a on which the control box CB is placed is connected to the floor surface 34a and the rear wall 33 with both bent end portions connected by connecting screws. Since the mounting posture of the support base 38a is an inclined posture that becomes higher toward the rear end side, the control box CB is also attached in an inclined posture.

  The control box CB contains electronic control equipment that handles control-related input / output signals. The electronic control device particularly related to the present invention is the control unit 5A that executes display control of the liquid crystal display unit 90 of the meter panel 27. A functional block diagram of the control unit 5A is shown in FIG. The control unit 5A can exchange data with other control units through the in-vehicle LAN. Here, the control unit 5A is connected to, for example, the sensor / switch ECU 5B via an in-vehicle LAN. The sensor switch ECU 5B has a function of processing signals received from various sensors and various switch buttons and sending them to other control units through the in-vehicle LAN. Examples of the sensor connected to the sensor switch ECU 5B include a sensor that measures the remaining amount of fuel in the fuel tank, a sensor that measures battery capacity, a sensor that measures engine oil pressure, and a sensor that measures the temperature of engine coolant. It is done. Further, as the switch button, only the switching operation tool 130 which is a momentary switch for switching the contents displayed by the fixed segment groups 103 to 107 of the liquid crystal display unit 90 is shown in the functional block diagram of FIG.

  Furthermore, the control unit 5A is connected to the meter panel 27 via a display-related device driver 5C, and controls various displays on the meter panel 27. The control unit 5A includes a state detection data processing unit 51, an evaluation unit 52, a state abnormality notification unit 53, a display control signal generation unit 54, an operation input data processing unit 55, and a display switching unit as functional units particularly related to the present invention. 56 etc. are constructed.

  The state detection data processing unit 51 receives a signal sent from the sensor or switch via the sensor / switch ECU 5B or converts it into data that can be handled in the control unit 5A, and changes the operation state of this combine. It has the function to output as the state detection data shown. The evaluation unit 52 evaluates the current driving state based on the state detection data output from the state detection data processing unit 51, and outputs the evaluation result. Based on the evaluation result output from the evaluation unit 52, the state abnormality notification unit 53 performs a warning for notifying the occurrence of this abnormality when an abnormality is detected in a specific driving state. Such warnings include fuel level warnings, engine oil pressure warnings, coolant temperature warnings, battery warnings, and the like. In this embodiment, both visual warning and auditory warning are adopted as warning notification forms. Therefore, a warning display command unit 53a that outputs a warning lamp lighting command and a warning message display command, a buzzer sound and a voice A warning sound command unit 53b that issues a message output command is provided.

  The display control signal generation unit 54 generates display control signals for controlling various displays on the meter panel 27 and lighting control of warning lights and illumination lamps, and outputs them to the corresponding devices via the device driver 5C. In this embodiment, the upper display area of the liquid crystal display unit 90 is configured as a multi-function display area in which the state of either the fuel remaining amount or the coolant temperature is displayed in stages. The control signal for displaying information on the remaining amount of fuel (first display form) and the control signal for displaying information on the coolant temperature (second display form) are selectively displayed on the upper display area of the liquid crystal display unit 90. Output to. Switching from one display state to the other display state of these two display forms is performed in response to a display switching command output from the display switching unit 56.

  One event for the display switching unit 56 to output a display switching command is an operation of the switching operation tool 130. Therefore, a signal generated by operating the switching operation tool 130 is sent to the operation input data processing unit 55 via the sensor switch ECU 5B. The operation input data processing unit 55 has a function of converting operation signals generated by various operation tools into data that can be handled in the control unit 5A, and outputting the data as operation input data. If the received operation signal is based on the operation of the switching operation tool 130, the operation input data processing unit 55 gives operation input data indicating that the switching operation tool 130 has been operated to the display switching unit 56.

  One of the events for the display switching unit 56 to output a display switching command is that the remaining amount of fuel falls below a predetermined amount. This is detected by the evaluation unit 52. When the remaining amount of fuel falls below a predetermined amount, data indicating the shortage of the remaining amount of fuel is provided from the evaluation unit 52 to the display switching unit 56 and the state abnormality notification unit 53. In response to this, the display switching unit 56 gives the display control signal generation unit 54 a command to display the remaining fuel amount in the upper display area of the liquid crystal display unit 90. Thereby, when the information on the coolant temperature is displayed in the upper display area of the liquid crystal display unit 90 at that time, the information on the remaining amount of fuel is forcibly displayed instead of the information on the coolant temperature. At the same time, the remaining fuel level warning is notified by the function of the state abnormality notification unit 53.

Next, an example of the display pattern in the liquid crystal display unit 90, particularly the upper display area thereof, controlled by the control unit 5A will be described with reference to the time charts of FIGS.
FIG. 14 shows display control after the main switch 121 is turned ON and display control after the switching operation tool 130 is operated. First, when the main switch 121 is turned on at time t1, after the initial processing is performed, the information on the remaining amount of fuel is displayed in the upper display area of the liquid crystal display unit 90 as the first display state, and the liquid crystal display In the upper display area of the unit 90, the engine operating time is displayed. As schematically shown in FIG. 14, in the first display state, the fuel remaining amount identification mark 101, the fuel empty state identification mark 102, and the fuel full state identification mark 108 are all lit. In addition, since the segments 103 to 107 display the current fuel remaining state, the segments 103, 104, and 105 are turned on and 106 and 107 are turned off in the example of FIG. From this display state, it is confirmed that the remaining amount of fuel is sufficient. Thereafter, when the switching operation tool 130 is operated at time t2, more specifically, since the switching operation tool 130 is a momentary switch, the upper display area of the liquid crystal display unit 90 indicates the remaining amount of fuel when it is turned off. A transition is made from the first display state for displaying information to the second display state for displaying information on the coolant temperature. In the second display state, the fuel remaining amount identification mark 101, the fuel empty state identification mark 102, and the fuel full state identification mark 108 are all turned off, and the segments 103 to 107 have the current coolant temperature. In the example of FIG. 14, only the segment 103 is lit, and the segment 104, the segment 105, the segment 106, and the segment 107 are unlit. In this display state, the driver sees the segment 103, the identification mark 911 “C”, the liquid temperature scale bar 912, the mark 913, and the identification mark 914 “H”. Confirmed to be at a low level. Furthermore, when the switching operation tool 130 is operated again at time t3, the upper display area of the liquid crystal display unit 90 displays the fuel remaining amount information from the second display state in which the coolant temperature information is displayed. Transition to the display state. Thus, every time the switching operation tool 130 is operated (t2, t3, t4...), The upper display area of the liquid crystal display unit 90 repeats the information display of the remaining fuel amount and the information of the coolant temperature. It is.

  FIG. 15 shows the display control when the evaluation unit 52 detects that the remaining fuel amount has fallen below the predetermined amount in the display process shown in FIG. As the display control after the main switch 121 is turned ON, the information display of the fuel remaining amount and the information display of the coolant temperature are repeated by operating the switching operation tool 130. However, in the middle of the display of the coolant temperature information, here, at time t21, when an evaluation result indicating that the remaining amount of fuel has fallen below the predetermined amount is output, automatically, that is, the switching operation tool 130 Without an operation, the upper display area of the liquid crystal display unit 90 shifts from the second display state in which the coolant temperature information is displayed to the first display state in which the fuel remaining amount information is displayed. Further, the remaining fuel level identifying mark 101 and the first segment 103 of the fixed segment group blink as a warning of insufficient fuel level. Of course, the remaining fuel level warning mark 101, the “E” identification mark 102, the segments 103 to 107, and the “F” identification mark 108, or any one selected from them, are displayed. You may employ | adopt the form which blinks. At the same time, an alarm buzzer is sounded. This alarm buzzer is sounded for a preset time in the timer and then stops at time t22. However, the warning display regarding the shortage of the remaining fuel with blinking described above continues regardless of the elapse of the set time of the timer. This warning display is switched to the coolant temperature information display by operating the switching operation tool 130 (time t23). Of course, only the flashing for warning may be set to normal lighting after the set time of the timer, and the information on the remaining fuel level for warning is also displayed as the coolant temperature information after the set time of the timer. It may be switched.

  In this embodiment, the evaluation result that the coolant temperature exceeds the predetermined temperature during the execution of the display control in which the information display of the remaining fuel amount and the coolant temperature information display are repeated by the operation of the switching operation tool 130 is performed. Is output as a warning, but the upper display area of the liquid crystal display unit 90 maintains the current display.

[Another embodiment]
(1) In the above-described embodiment, information related to the remaining amount of fuel is displayed on the liquid crystal display unit 90 of the meter panel 27, and an index related to the engine coolant temperature is provided just above the liquid crystal display unit 90 with a seal or the like. The state is displayed on the segments 103 to 107 of the liquid crystal display unit 90 in combination with the remaining amount of fuel. Instead, information related to the engine coolant temperature is displayed on the liquid crystal display unit 90 of the meter panel 27, an index relating to the remaining amount of fuel is provided by a seal or the like immediately above the liquid crystal display unit 90, and the remaining fuel amount is displayed on the liquid crystal display. A configuration may be adopted in which the segments 103 to 107 of the unit 90 are displayed in combination with the liquid temperature.

(2) In the embodiment described above, the liquid temperature index region 91 in which the index related to the engine coolant temperature is formed is arranged adjacent to the upper end of the liquid crystal display section 90. In the case of being displayed in the lower display area, the liquid temperature indicator area 91 is disposed adjacent to the lower end of the liquid crystal display unit 90. When there is a margin part around the remaining fuel amount display area of the liquid crystal display unit 90, the liquid temperature indicator area 91 may be arranged in the margin part. Furthermore, if the margin is within the range of the liquid crystal display unit 90, the liquid temperature index can be displayed on the liquid crystal.

(3) FIG. 16 is a side view of a rice / wheat combine that employs the meter panel 27 having the multi-function display area 9 as described above, although it has a different harvesting structure from the corn combine. In this combine, cereals such as rice and wheat obtained by harvesting planted cereals by the harvesting device 6 are transported by the transporting device 8 from the harvesting device 6 to the threshing device 141, and the grains obtained by the threshing process are cereal grains. It is stored in the grain tank 142. Since the combine travels in the daytime while operating the work device in the vast field, it is necessary to pay attention to the remaining fuel and the coolant temperature, which is a preferred application example of the work vehicle according to the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used for a harvester that harvests various crops such as carrots, sugar cane, and soybeans as well as a harvester that harvests corn, rice, and wheat.

4: Engine (internal combustion engine)
27: Meter panel 5A: Control unit 5B: Sensor / switch control unit 5C: Device driver 51: State detection data processing unit 52: Evaluation unit 53: State abnormality notification unit 54: Display control signal generation unit 56: Display switching unit 9: Multifunctional display area 90: Liquid crystal display 91: Liquid temperature indicator area 911: Identification mark 912: Liquid temperature scale bar 913: Mark indicating cooling liquid abnormality 914: Identification mark 93: Warning light area 93a: Liquid temperature warning light 93c : Hydraulic warning light 101: Identification mark 102: Identification marks 103 to 107: Segment 108: Identification mark 130: Switching operation tool

Claims (10)

A traveling vehicle body powered by an internal combustion engine;
A driving part formed on the traveling vehicle body;
A meter panel provided in the operating section;
A switching operation tool provided in the driving unit;
A multi-function display area arranged on the meter panel;
A display switching unit that selectively displays the coolant temperature in the internal combustion engine and a functional state other than the coolant temperature in the multi-function display area based on an operation on the switching operation tool;
Work vehicle equipped with.   2. The work vehicle according to claim 1, wherein the multi-function display area includes a plurality of electronic display fixing segments that are commonly used when displaying the coolant temperature and the functional state in stages.   The display trigger temperature of each stage displayed when the temperature rises in the stage display of the coolant temperature is set lower than the non-display trigger temperature of each stage that is hidden when the temperature falls. The work vehicle described.   The work vehicle according to claim 2 or 3, wherein marks indicating upper and lower limits of the coolant temperature and the functional state are provided around both ends of the plurality of electronic display fixing segments in the meter panel.   Marks indicating the upper and lower limits of the functional state are displayed so that display / non-display control is possible by the electronic display fixed segment for sign, and marks indicating the upper and lower limits of the coolant temperature are always displayed on the meter panel. The work vehicle according to any one of claims 2 to 4.   6. A state abnormality notifying unit is provided that issues a cooling temperature warning when the cooling liquid temperature is abnormal and performs a functional state abnormality warning when a functional state other than the cooling liquid temperature is abnormal. Work vehicle as described in the paragraph.   The work vehicle according to claim 6, wherein the functional state abnormality warning is performed by blinking of the electronic display fixed segment, and the coolant temperature warning is performed by a warning lamp disposed on the meter panel.   The work vehicle according to any one of claims 1 to 7, wherein the functional state other than the coolant temperature is a remaining fuel amount of the internal combustion engine.   The operation according to any one of claims 1 to 8, wherein the driving unit is formed in a driving cabin, the meter panel is arranged in an upper part of the driving cabin, and the switching operation tool is arranged in a control device. car.   The switching operation tool is a momentary switch, and each time the momentary switch is operated, the coolant temperature and the function state are selectively displayed in the multi-function display area. Work vehicle as described in the paragraph.

Images