JP6465130B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle.

It is known that a conventional seedling transplanter is provided with a fertilizer application device for spraying fertilizer and the like (see, for example, Patent Document 1).

  In the fertilizer application shown in Patent Document 1, an operator manually turns a feed amount adjustment handle provided to manually adjust a set amount of fertilizer supplied from a fertilizer hopper in advance, and a drive-side swing rod And the structure which changes the rotation speed of a delivery drive shaft and changes the feed amount of a fertilizer by changing the angle of the counter arm which connects a feed input arm together. The driving force of this fertilizer is obtained from the planting transmission clutch. When the fertilizer clutch that cuts off the driving force from the planting transmission clutch is cut, the driving of the fertilizer can be stopped.

JP 2006-166820 A

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  An object of this invention is to provide the work vehicle which can detect the depth of a farm field and can detect a fertilizer density | concentration accurately.

In order to solve the above-mentioned problem, a fertilizer concentration detection sensor (1110) for detecting the fertilizer concentration in the field by a pair of left and right electrode plates (1100) disposed on the traveling vehicle body (2),
A pair of left and right depth detection sensors (1140) for detecting the depth of a field, a storage hopper (60L, 60R) for storing fertilizer, and the fertilizer supplied from the storage hopper , disposed on the traveling vehicle body (2). A feeding device (61, 300) that feeds out a set amount, a fertilization amount adjusting device (400) that adjusts a fertilizing amount fed out from the feeding device, and a fertilizer that sets the fertilizing amount for the fertilizing amount adjusting device An amount setting device (200, 210), and a fertilization amount adjustment motor (410) driven based on an instruction from the fertilization amount setting device (200, 210) ,
Based on the detection result of the fertilizer concentration detection sensor (1110) and the detection result of the depth detection sensor (1140), the fertilizer application amount adjustment motor (410) is operated.
The left and right pair of depth detection sensors (1140) are arranged on the front side and the outside of the left and right front wheels (10) of the traveling vehicle body (2), respectively.
The electrode plate (1100) is attached to the left and right front wheels (10),
A foil cap (1115) is provided on the outside of the front wheel (10), and a part of the inner peripheral edge of the tire (1112) of the front wheel (10 ) is provided between the electrode plate (1100) and the spoke (1114) . The working vehicle is characterized in that insulating extension members (1112a, 1112b) are provided in an inner gap and an outer gap between the spoke (1114) and the foil cap (1115), respectively .

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  Further, the invention of claim 2 is provided with a fertilizer device (100) for supplying fertilizer to the traveling vehicle body (2), and the fertilizer device (100) swings at a swing fulcrum (360) to apply fertilizer. And a fertilizer application amount adjusting device (400) for changing the fertilizer application amount by changing the position of the swing fulcrum (360), and the fertilizer application amount is controlled by the swing fulcrum (360). 2. The work vehicle according to claim 1, wherein the fertilizer supply of the fertilizer applying device (100) is stopped when the fertilizer is moved to the end on the decreasing side.

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According to the invention of claim 1, for example, by accurately detecting the fertilizer concentration in the field based on the fertilizer concentration detected by the fertilizer concentration detection sensor (1110) and the depth detected by the ultrasonic sensor (114), The swinging fulcrum pin (360) can be moved to automatically change the fertilization amount in accordance with the field conditions.
Further, for example, by arranging the pair of left and right depth detection sensors (1140) on the front side and the outside of the left and right front wheels, mud that the left and right front wheels (10) jump up is less likely to be applied, so that the depth detection of the field can be performed. Appropriately performed, the amount of fertilization from the fertilizer application device (100) becomes appropriate, and poor growth of crops is prevented.
Further, the insulation between the front wheel (10) and the electrode plate (1100) can be configured at low cost. Further, when entering the farm, some mud may enter from the gap between the electrode plates 1100 and the mud remains between the foil cap 1115, but since the insulator is provided on the back surface 1102b, the electrode plate 1100 Misdetection due to can be prevented.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the operation of the fertilizer application (100) can be stopped by the operation of the fertilizer adjustment device (400). Switching operation according to the situation can be performed efficiently.

  Moreover, since the fertilizer application amount adjusting device (400) can also serve as the transmission clutch of the fertilizer applying device (100), the number of parts can be reduced.

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The side view of the riding type rice transplanter of the 8 row planting which mounts the fertilizer application in embodiment of this invention Plan view of 8-row riding rice transplanter equipped with fertilizer application in this embodiment (A) Schematic rear view when the fertilizer application of the present embodiment is viewed from the rear of the rice transplanter, (b) Schematic side view when the fertilizer of the present embodiment is viewed from the right side, (c) Fertilization Schematic perspective view showing drive rod mechanism Left side sectional view of the feeding portion of the fertilizer application of the present embodiment 3B is an enlarged view of the main part of FIG. 3B to show the configuration of the high-speed feeding adjustment mechanism and the like in the present embodiment. Schematic diagram showing the control relationship between various sensors and the fertilizer adjustment motor, etc., to be controlled with the controller at the center in this embodiment. The schematic diagram explaining the reason why the distance from the surface of the field topsoil to the muddy water surface can be obtained by using the detection results of the ultrasonic sensor, the elevation control sensor, and the link sensor of the present embodiment. (A) Schematic view of the rice transplanter in the present embodiment as viewed from the front, (b) Schematic view of the bonnet portion of the rice transplanter as viewed from the left side. Schematic diagram viewed from the left side with the driver seat portion of the rice transplanter in the present embodiment as the center (A) A schematic front view of a rice transplanter for explaining the storage configuration of the tablet terminal, (b) a left side view near the hood of the rice transplanter for explaining the storage configuration of the tablet terminal, (c) Perspective view of tablet terminal storage case (A) Schematic front view of rice transplanter for explaining movable storage configuration of tablet terminal, (b) Perspective view of movable tablet terminal storage case (A) Schematic side view of front wheel of rice transplanter of this embodiment, (b) Schematic sectional view of front wheel of rice transplanter of this embodiment (A) Schematic side view of front wheel of rice transplanter of this embodiment, (b) Schematic sectional view of front wheel of rice transplanter of this embodiment Schematic sectional view of the front wheel of the rice transplanter of the present embodiment

  Hereinafter, a riding type rice transplanter equipped with a fertilizer application device according to an embodiment of the rice transplanter of the present invention will be described with reference to the drawings.

(Embodiment)
FIG. 1 is a side view of an 8-row riding rice transplanter 1 equipped with a fertilizer application according to an embodiment of the present invention, and FIG. 2 is a plan view thereof.

  In the present specification, the front / rear and left / right direction standards are defined based on the traveling direction of the vehicle body as viewed from the driver's seat.

  In this rice transplanter 1, a planting device 4 is mounted on the rear side of the traveling vehicle body 2 via an elevating link device 3 so that the planting device 4 can be moved up and down.

  In addition, the fertilizer 5 is equivalent to an example of the fertilizer of the present invention.

  The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and a pair of left and right rear wheels 11 as drive wheels, and a mission case 12 is disposed in the front part of the fuselage. A front wheel final case 13 is provided on the side, and the front wheels 10 are respectively attached to left and right front wheel axles that project outward from respective front wheel support portions that can change the steering direction of the left and right front wheel final cases 13.

  Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel gear case 18 is supported by a rear wheel rolling shaft provided horizontally in the front and rear at the left and right central portions of the rear end of the main frame 15. The rear wheels 11 are respectively attached to left and right rear wheel axles that are supported in a freely rolling manner and project outward from the rear wheel gear case 18.

  The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via a belt transmission device 21 and an HST (hydrostatic hydraulic stepless transmission) 23.

  The rotational power transmitted to the mission case 12 is shifted by the transmission in the mission case 12, and then separated into traveling power and external power to be extracted. A part of the traveling power is transmitted to the front wheel final case 13 to drive the pair of left and right front wheels 10 and 10, and the rest is transmitted to the rear wheel gear case 18 to drive the pair of left and right rear wheels 11 and 11. .

  Further, the external take-out power is transmitted to a planting clutch case 25 provided at the rear part of the traveling vehicle body 2, and then transmitted to the planting device 4 through the planting transmission shaft 26 and also to the fertilizer application device 100. The fertilizer application apparatus 100 will be further described later.

  The upper part of the engine 20 is covered with an engine cover 30, and a driver's seat 31 is installed thereon. A bonnet 32 incorporating various operation mechanisms is provided in front of the driver's seat 31, and a steering handle 34 for steering the front wheels 10 is provided above the bonnet 32.

  Moreover, in the inside covered with the bonnet 32, the fertilizer application amount setting panel 200 for an operator to set the fertilizer applied to the field by the fertilizer application apparatus 100, the controller 210 for controlling the operation of the fertilizer application apparatus 100, and the like. Is stored. An input signal from the fertilizer application setting panel 200 is sent to the controller 210 (see FIG. 6). Further, instead of or in addition to the fertilization amount setting panel 200, a configuration including a tablet terminal 250 having a function equivalent to or higher than that of the fertilization amount setting panel 200 may be employed. These will be further described later.

  The engine cover 30 and the bonnet 32 have horizontal floor steps 35 on the left and right sides of the lower end. The floor step 35 is partly grid-shaped (see FIG. 2), and mud on the shoe of the worker walking on the floor step 35 falls into the field.

  The elevating link device 3 has a parallel link configuration and includes one upper link 40 and a pair of left and right lower links 41. The upper link 40 and the lower link 41 are pivotally attached to a gate-shaped link base frame 42 in a rear view in which the base side is erected at the rear end of the main frame 15, and the vertical link 43 is attached to the distal end side thereof. Are connected. And the connecting shaft 44 rotatably supported by the planting apparatus 4 is inserted and connected to the lower end part of the vertical link 43, and the planting apparatus 4 is connected so that rolling is possible centering | focusing on the connecting shaft 44.

  An elevating hydraulic cylinder 46 is provided between a support member fixed to the main frame 15 and a tip of a swing arm (not shown) integrally formed with the upper link 40, and the elevating hydraulic cylinder 46 is expanded and contracted hydraulically. As a result, the upper link 40 rotates up and down, and the planting device 4 moves up and down while maintaining a substantially constant posture.

  The planting device 4 has an eight-row planting structure, a planting transmission case 50 that also serves as a frame, a mat seedling (not shown), and a left and right reciprocating motion so that the seedlings are taken out by one seedling outlet 51a (see FIG. 2), and when all the seedlings for one horizontal row are supplied to the seedling outlet 51a, the seedling mount 51 for transferring the seedling downward by the seedling feeding belt 51b, and the seedling supplied to the seedling outlet 51a The seedling planting part 52 etc. which are planted in a farm field by the seedling planting tool 52a are provided.

  In the lower part of the planting device 4, a center float 55 is provided at the center, and side floats 56 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 55 and 56 in contact with the mud surface of the field, the floats 55 and 56 slide while leveling the mud surface, and seedlings are planted by the seedling planting unit 52 on the ground level. .

  Each of the floats 55 and 56 is rotatably attached so that the front end side thereof moves up and down corresponding to the unevenness of the soil surface of the field, and the vertical movement of the front part of the center float 55 is the angle-of-attack control sensor 1141 during planting work. (See FIG. 6), and by switching the hydraulic valve (not shown) that controls the lifting hydraulic cylinder 46 in accordance with the detection result, the planting device 4 is moved up and down, so that the planting depth of the seedling is always increased. Keep constant.

  The fertilizer application device 100 feeds the granular fertilizer stored in the fertilizer hopper by a certain amount by the feeding unit 61 provided for each seedling planting line, and the fertilizer is fed by the fertilizer hose 62 with the center float 55 and the side float. The fertilizer guides 63 attached to the left and right sides of the fertilizer 56 are guided to the fertilizer guides 63 and dropped into fertilizer grooves formed in the vicinity of the side portions of the seedling planting strips by the grooved body 64 provided on the front side of the fertilizer guide 63.

  The air generated by the blower 67 driven by the blower electric motor 66 is blown into the fertilizer hose 62 via the air chamber 68 that is long in the left-right direction, and the fertilizer in the fertilizer hose 62 is forcibly conveyed by wind pressure. It is the composition to do.

  Further, as shown in FIG. 2, the fertilizer hopper is arranged with a certain gap between the left manure hopper 60L and the right manure hopper 60R, and a high-speed feed adjustment mechanism 400 is arranged in the gap. Has been. The high-speed feeding adjustment mechanism 400 is a mechanism for adjusting the fertilization amount fed from the feeding unit 61 for feeding fertilizers by a set amount by using the driving force transmitted through the fertilization transmission mechanism 300. The fertilizer transmission mechanism 300 and the high-speed feeding adjustment mechanism 400 will be described later.

  By arranging the high-speed feeding adjustment mechanism 400 in the gap between the left-side fertilizer hopper 60L and the right-side fertilizer hopper 60R, it becomes an obstacle in various operations such as replenishing the left and right fertilizer hoppers 60L and 60R. In addition, the left and right fertilizer hoppers 60L and 60R can be inclined toward the rear.

  The configuration including the left-side fertilizer hopper 60L and the right-side fertilizer hopper 60R corresponds to an example of the storage hopper of the present invention. Moreover, the high-speed feeding adjustment mechanism 400 corresponds to an example of a fertilizer application amount adjusting device of the present invention.

  A leveling rotor 27 (the combination of the first leveling rotor 27a and the second leveling rotor 27b may be simply referred to as leveling rotor 27) is attached to the planting device 4.

  The seedling platform 51 is slid in the left-right direction by a support roller 65a that is slidably supported at the upper end of a rectangular support frame 65 that is full in the left-right direction and the up-down direction that supports the entire planting device 4. It is the structure to do.

  A pair of left and right spare seedling frames 38 on which a replenishing seedling is placed are provided on both the left and right sides of the front portion of the traveling vehicle body 2.

  Further, in the vicinity of the operation handle 34, there is provided a fertilizer reduction setting switch 500 that enables the operator to set the fertilizer reduction amount. For example, the standard fertilizer application amount is reduced from 0% to 100%. It is a switch that can set any weight loss. The input signal input from the fertilizer reduction setting switch 500 is sent to the controller 210 (see FIG. 6).

  Instead of the fertilizer reduction setting switch 500, a tablet terminal 250 having a function equivalent to or higher than that of the fertilizer reduction setting switch 500 may be used.

  Moreover, the electrode plate 1100 (refer FIG. 1) for detecting the fertilizer density | concentration in the agricultural field between the front wheels 10 and 10 is arrange | positioned at a pair of right and left front wheels 10 and 10, and the fertilizer concentration detection sensor 1110 (refer FIG. 6). ). The fertilizer concentration signal detected by the fertilizer concentration detection sensor 1110 is sent to the controller 210. The electrode plate 1100 will be further described later.

  Further, an inclination detection sensor 1120 (see FIG. 1) for detecting the inclination of the traveling vehicle body 2 is provided at the center of the front end of the traveling vehicle body 2, and the detection result of the inclination detection sensor 1120 is sent to the controller 210 (see FIG. 1). 6).

  In addition, a GPS receiver 1130 (see FIG. 2) having a GPS (Global Positioning System) function is mounted in front of the operation handle 34 and above the hood 32, and the received signal is sent to the controller 210. (See FIG. 6).

  Also, in plan view, it is used for detection of fertilizer concentration at a position approximately in front of the front ends of the pair of left and right front wheels 10 and 10 and outside the pair of left and right front wheels 10 and 10 and the outside of the floor step 35. A pair of left and right ultrasonic sensors 1140 is provided to detect the water depth of the farm field, and the detection result by the ultrasonic sensor 1140 is sent to the controller 210 (see FIG. 6). By attaching the ultrasonic sensor 1140 to the above position, it is possible to prevent erroneous detection of water depth due to mud lifted by the front wheel 10 and to prevent damage to the sensor. The detection of water depth data will be described later.

  Hereinafter, the structure of each part of the fertilizer application apparatus 100 of this Embodiment is further demonstrated.

  Fig.3 (a) is a schematic back view when the fertilizer application apparatus 100 of this Embodiment is seen from the back of the rice transplanter 1, The left-side fertilizer hopper 60L is the same structure as the right-side fertilizer hopper 60R fundamentally. Therefore, a part of the illustration is omitted. Moreover, FIG.3 (b) is a schematic side view when the fertilizer application 100 of this Embodiment is seen from the right side surface, and in order to show the schematic structure of the high-speed feeding adjustment mechanism 400, it is right side manure hopper 60R for convenience. Is omitted.

  FIG. 4 is a left side cross-sectional view of the feeding portion 61 of the fertilizer application 100 of the present embodiment.

  FIG. 5 is an enlarged view of the main part of FIG. 3B for showing the configuration of the high-speed feeding adjustment mechanism 400 and the like.

  In FIG. 5, the swing arm 350 is disposed on the back side in the drawing, the swing arm coupling plate 357 is disposed on the front side thereof, and the guide plate 355 swings with the swing arm 350. Although arranged between the arm connecting plates 357, the guide plate 355 is indicated by a two-dot chain line for the sake of convenience in order to make the back side swing arm 350 easy to see.

  The right fertilizer hopper 60R shares the right four strips, and a lid 60a that can be opened and closed is attached to the top. The lower portion of the right fertilizer hopper 60R is branched into a number of fertilizer strips (four strips) to form a funnel shape 60b, and the lower portion is connected to the upper end of each feeding portion 61. The left-side fertilizer hopper 60L has the same configuration as above.

  As shown in FIG. 4, the feeding unit 61 includes two first feeding rolls 73 </ b> A and a second feeding roll 73 </ b> B that feed the fertilizer in the right manure hopper 60 </ b> R (or the left manure hopper 60 </ b> L) downward. . These feeding rolls 73A and 73B are rotating bodies each having a groove-like recess 74 formed on the outer peripheral portion thereof, and are integrally formed with a corner shaft portion 75a (a square shaft in the illustrated example) of a common feeding shaft 75 provided in the left-right direction. They are fitted in a rotating configuration. The drive source of the feeding shaft 75 will be further described later with reference to FIGS. 3 (a) and 3 (b).

  When the first feeding roll 73A and the second feeding roll 73B rotate in the direction of the arrow in FIG. 4, the fertilizer dropped and supplied from the left-side fertilizer hopper 60L (or the right-side fertilizer hopper 60R) is accommodated in the concave portion 74 and downward. It is paid out. The fertilizer fed by the first feeding roll 73A and the second feeding roll 73B is discharged from the discharge port 61a at the lower end.

  A front end portion of the discharge port 61a of the feeding portion 61 is inserted and connected to the back surface portion of the air chamber 68 (see FIGS. 1 and 2) in the front-rear direction, and a rear end portion communicates with the discharge port 61a of the feeding portion 61. A connecting pipe (not shown) is connected.

  On the other hand, the left end portion of the air chamber 68 is connected to a blower 67 (see FIGS. 1 and 2) via an air switching pipe (not shown), and the air from the blower 67 passes through the air chamber 68 and is connected to the connection pipe. When passing through the discharge port 61a of the feeding portion 61, the fertilizer is blown into the fertilizer hose 62 side while entraining the fertilizer.

  In addition, the number of the concave portions 74 of the first feeding roll 73A and the second feeding roll 73B in the illustrated example is six, and the phases of the concave portions 74 are arranged differently so that the positions of the concave portions 74 are not adjacent to each other. Has been. Thereby, each recessed part 74 of 73 A of 1st feed rolls and the 2nd feed roll 73B will alternately feed a fertilizer, and the quantity of the fertilizer discharged from the discharge outlet 61a is equalized temporally.

  The phase of the recesses 74 of the first feeding roll 73A and the second feeding roll 73B is changed by removing either the first feeding roll 73A or the second feeding roll 73B from the feeding shaft 75 and changing the phase appropriately. It can be made equal. This makes it possible to apply fertilizer to the field in the form of dots.

  Further, a brush 76 slidably in contact with the outer peripheral surfaces of the first feeding roll 73A and the second feeding roll 73B on the side (front side) where the concave portion 74 moves downward is detachably provided inside the feeding portion 61. By this brush 76, the fertilizer is housed in the recesses 74 of the first feeding roll 73 </ b> A and the second feeding roll 73 </ b> B, and the amount of fertilizer fed by the first feeding roll 73 </ b> A and the second feeding roll 73 </ b> B is kept constant.

  Here, the drive source of the feeding shaft 75 (see FIG. 4) described above will be described mainly with reference to FIGS. 3 (a) and 3 (b).

  That is, the feeding shaft 75 protrudes through the outer wall portion of the feeding portion 61 to the outside, and a feeding drive gear 81 (see FIG. 3A) is fixed to the protruding tip portion, so that the feeding drive is performed. The gear 81 is rotatably meshed with a feeding transmission gear 82 that transmits a rotational driving force from the planting clutch case 25 side.

  As shown in FIG. 3A, each of the feeding transmission gears 82 is fixed to feeding rotation shafts 310 </ b> L and 310 </ b> R that are rotatably arranged in the left and right directions at the lower end portion of each feeding portion 61. Then, when the feeding rotation shafts 310L and 310R rotate intermittently, the first feeding roll 73A and the second feeding roll 73B are moved in the direction of the arrow in FIG. 4 via the feeding transmission gear 82 and the feeding driving gear 81. Rotate intermittently.

  Here, with reference to FIGS. 3A and 3B, a fertilizer transmission mechanism 300, a fertilizer drive rod mechanism 330, a swing arm 350, and the like for rotating the feeding rotary shafts 310L and 310R are provided. The explanation is centered.

  As shown in FIGS. 3 (a) and 3 (b), the crank arm 25a protruding from the rear surface of the planting clutch case 25 fixed to the rear portion of the traveling vehicle body 2 is output and rotated, and one end portion is connected to the crank arm 25a. The fertilizer application driving rod mechanism 330 is converted into a reciprocating motion in the vertical direction and transmitted to the one end 350 a of the swing arm 350. Here, the swing arm 350 is supported by the high-speed feeding adjustment mechanism 400 so as to be swingable by a swing fulcrum pin 360 that is configured to be horizontally movable in the front-rear direction.

  The high-speed feeding adjustment mechanism 400 will be further described later with reference to FIG.

  The swing arm 350 swings in the vertical direction using the swing fulcrum pin 360 as a swing fulcrum, so that the feeding transmission arm 370 whose upper end 370a is connected to the other end 350b of the swing arm 350 is moved up and down. It is configured to reciprocate in the direction and to be transmitted to the one-way clutch mechanism 390 via a feeding input arm 380 (see FIG. 5) connected to the other lower end portion 370b of the feeding transmission arm 370. The one-way clutch rotation shafts 391L and 391R protruding from the one-way clutch mechanism 390 in the left-right direction are connected and fixed to the supply rotation shafts 310L and 310R, respectively.

  In the present embodiment, a configuration including the feeding transmission arm 370, the feeding input arm 380, the one-way clutch mechanism 390, and the feeding transmission shafts 310L and 310R is collectively referred to as a fertilization transmission mechanism 300.

  In addition, the structure including the feeding part 61 and the fertilization transmission mechanism 300 of this Embodiment corresponds to an example of the feeding apparatus of this invention.

  Here, the fertilization drive rod mechanism 330 will be further described mainly with reference to FIG. FIG. 3C is a schematic perspective view showing the fertilization drive rod mechanism 330.

  As shown in FIG. 3 (c), the fertilization drive rod mechanism 330 has a main drive rod 331 that is reciprocated in the vertical direction with one end connected to the crank arm 25a, and changes the transmission direction of the drive force from the main drive rod 331. In order to achieve this, the relay rod 332 extending in the left-right direction is connected and disposed between the main drive rod 331 and the relay rod 332, and the center drive swing fulcrum pin 334a is used as a support shaft to move the main drive rod 331 up and down. A swing coupling plate 334 whose both ends swing in the vertical direction in conjunction with the movement, and a sub drive rod 333 that transmits a driving force to the swing arm 350 from the other end 332a of the relay rod 332 are configured. The swing connection fulcrum pin 334 a is fixed to the frame of the traveling vehicle body 2.

  According to the said structure, the structure of the fertilization drive rod mechanism 330 can be made compact.

  Further, according to the above configuration, since a space can be secured in the connecting portion between the main drive rod 331 and the sub drive rod 333, the fertilizer hose 62 passing near the relay rod 332 can be arranged to pass above the relay rod 332. .

  By allowing the fertilizer hose to pass from above the relay rod 332 arranged in the left-right direction, the relay rod 332 can be prevented from hanging down from the fertilizer hose 62. Therefore, it is prevented that the timing at which the fertilizer is supplied to the field is delayed or the fertilizer is accumulated in the fertilization hose 62, and the fertilization accuracy is improved.

  Moreover, since it can prevent that the fertilization hose 62 is pressed by the surrounding member and is crushed or deform | transformed, while improving durability, it is prevented that the movement of a fertilizer is prevented and fertilization precision improves.

  Further, when the planting device is lifted up, the fertilizer hose 62 is provided so as to pass above the relay rod 332 arranged in the left-right direction even if the fertilizer hose 62 near the relay rod 332 bends upward. Therefore, the relay rod 332 does not get in the way.

  Next, the configuration centering on the swing arm 350 of the fertilizer transmission mechanism 300 and the high-speed feeding adjustment mechanism 400 will be further described with reference mainly to FIG.

  As shown in FIG. 5, the swing arm 350 is an elongated, substantially rectangular parallelepiped housing, and on its left and right sides, a swing fulcrum pin moving elongated hole 351 that penetrates the rear side wall and the front side wall in the figure is formed. Has been. Further, the front end portion 351b of the swinging fulcrum pin moving long hole 351 is formed to a position adjacent to the one end portion 370a of the feeding transmission arm 370.

  A swing fulcrum pin 360 arranged so as to penetrate the swing fulcrum pin moving elongated hole 351 from the back side toward the near side in the figure is high-speed between both ends of the swing fulcrum pin moving elongated hole 351. The tip of the swing fulcrum pin 360 (front side in the figure) is placed on the upper part of a guide plate 355 that is erected and fixed on the left side of the one-way clutch mechanism 390. It is supported by the inner peripheral edge portion of the guide long hole 356 formed corresponding to the pin moving long hole 351 so as to be horizontally movable at high speed.

  Further, one end portion 350a of the swing arm 350 is rotatably connected to the upper end portion 333a of the sub drive rod 333 together with the one end portion 357a of the swing arm connecting plate 357. The other end portion 357b of the swing arm connecting plate 357 is connected to be rotatable about a connecting plate rotating shaft 358 at a position adjacent to the rear end portion 356a of the guide long hole 356 on the guide plate 355. ing.

  5 shows a configuration in which the front end portion 351b of the swinging fulcrum pin moving elongated hole 351 is not formed at a position overlapping the one end portion 370a that is a connecting portion of the feeding transmission arm 370 in a side view. However, the present invention is not limited to this. For example, both positions may completely overlap each other in a side view. However, in this case, when the swing fulcrum pin 360 moves to the front end portion 351b, it is necessary to have a configuration that does not interfere with the one end portion 370a that is a connecting portion with the feeding transmission arm 370.

  According to this configuration, by moving the swing fulcrum pin 360 to the front end portion 351b of the swing fulcrum pin moving elongated hole 351, the one end portion 350a of the swing arm 350 swings greatly in the vertical direction. When viewed, the swinging in the vertical direction of the feeding transmission arm 370 having the one end 370a coupled to the position of the swinging fulcrum pin 360 is stopped.

  That is, according to this configuration, when the set amount of the high-speed feeding adjustment mechanism 400 is set to “minimum”, the movement of the feeding transmission arm 370 is stopped, so that the operation of the feeding unit 61 can be stopped instantaneously. The switching operation according to the necessity / unnecessity of fertilization can be performed efficiently. Further, since the high-speed feeding adjustment mechanism 400 can also serve as the transmission clutch function of the fertilizer application apparatus 100, it is not necessary to separately provide the transmission clutch of the fertilizer application apparatus 100, and the number of parts can be reduced.

  Next, the high-speed feeding adjustment mechanism 400 will be described.

  As shown in FIG. 5, the high-speed feeding adjustment mechanism 400 includes a controller 210 (see FIG. 6) that receives input from the fertilizer application setting panel 200 and the fertilizer reduction setting switch 500 or signals from various sensors such as the fertilizer concentration detection sensor 1110. In accordance with an instruction from the fertilizer amount adjusting motor 410 that rotates at high speed in a forward and reverse direction, a ball screw 420 that rotates at high speed by the fertilizer amount adjusting motor 410, and a helical groove formed on the surface of the ball screw 420. A ball nut 430 that moves at a high speed, a swing fulcrum pin 360 fixed below the ball nut 430, and a stroke sensor 440 that detects the amount of movement of the ball nut 430.

  That is, the fertilizer application amount adjustment motor 410 is fixed to a motor fixing plate 411 fixed to the frame side of the traveling vehicle body 2 and is disposed in front of the left manure hopper 60L and behind the driver seat 31 (see FIG. 1, see FIG.

  Thereby, even if the ball nut slides on the ball screw 420, the fertilization amount adjusting motor 410 is fixed, so that generation of vibration can be prevented. In addition, since the fertilization amount adjusting motor 410 is disposed between the rear of the driver's seat 31 and the left fertilizer hopper 60L, an effective space on the left and right sides of the engine cover 30 is secured, so that workability can be improved. .

  The ball screw 420 has one end 420 a connected to the output rotation shaft of the fertilizer adjustment motor 410 and is rotatably supported by a bearing bearing 421, and the other end 420 b can be rotated by a bearing bearing 421. Is arranged horizontally in the front-rear direction, and fits within the front-rear width of the left and right fertilizer hoppers 60L, 60R. The bearing bearing 421 is fixed to the motor fixing plate 411.

  By adopting a configuration in which the ball screw 420 is accommodated within the front and rear widths of the left and right fertilizer hoppers 60L and 60R, safety and workability can be improved.

  A ball nut holding plate 431 that holds a ball nut 430 that is rotatably fitted to the ball screw 420 so as to be movable with respect to the axial direction of the ball screw 420 is fixed to the ball nut 430. The upper end portion 431a of the ball nut holding plate 431 is formed with a pointer 432 upward on the upper side of the ball nut 430. On the other hand, a swing fulcrum pin 360 is erected and fixed to the lower end 431 b of the ball nut holding plate 431. Further, the tip of the movable shaft 441 of the stroke sensor 440 arranged in parallel above the ball screw 420 is fixed to the upper end 431 a of the ball nut holding plate 431. The stroke sensor 440 is configured to detect the amount of movement of the ball nut 430 by utilizing the fact that the resistance value changes according to the movement of the movable shaft 441.

  According to the above configuration, the ball nut 430 moves forward or backward at high speed (see arrow A in FIG. 5) at the same time as the fertilization amount adjusting motor 410 rotates at high speeds in the forward and reverse directions, and at the same time is fixed to the ball nut holding plate 431. The swing fulcrum pin 360 moves forward or backward at high speed along the guide slot 356 (see arrow A in FIG. 5).

  Further, the configuration in which the pointer 432 is accommodated in the left and right fertilizer hoppers 60 </ b> L and 60 </ b> R and the ball screw 420 is disposed upwardly improves visibility and prevents damage.

  A protective cover 450 is disposed above the ball screw 420 and the ball nut 430. This protective cover 450 is fixed to the central side surface 60La of the left-side fertilizer hopper 60L, and even if fertilizer or soil is spilled during replenishment of seedlings or fertilizers, they are prevented from adhering to rotating parts and the occurrence of failure Can be prevented.

  6 shows a controller 210 that receives inputs from the fertilizer application setting panel 200 and the fertilizer reduction switch 500 or signals from various sensors such as the fertilizer concentration detection sensor 1110, and a fertilizer adjustment motor 410 that is a control target. It is a schematic diagram which shows a control relationship.

  When the fertilizing amount adjustment motor 410 rotates and the ball nut 430 moves at a high speed to the position of the rearmost end as shown in FIG. 5, the swing fulcrum pin 360 moves most rearward. As shown in FIG. 5, the swinging movement of the swinging arm 350 is maximized by the swinging of the swinging arm 350, and the rotational distance of the one-way clutch mechanism 390 is also maximized. The intermittent rotational speed of the feeding rotary shafts 310L and 310R connected to the rotary shafts 391L and 391R is also maximized, and the amount of fertilizer fed from the feeding unit 61 is maximized.

  Further, when the fertilization amount adjusting motor 410 rotates and the ball nut 430 moves at a high speed to the position of the foremost end, the swing fulcrum pin 360 moves to the foremost side. Since the swinging arm 350 swings the swinging transmission arm 370 in the up and down direction and the one-way clutch mechanism 390 also has the minimum turning distance, the one-way clutch turning shafts 391L and 391R The intermittent rotational speed of the coupled feeding rotation shafts 310L and 310R is also minimized, and the amount of fertilizer fed from the feeding unit 61 is minimized.

  In addition, when the planting operation is stopped, the swing arm 350 is always stopped at the horizontal position. Thereby, when adjusting the fertilizer amount at the time of a stop, the ball nut 430 can move smoothly on the ball screw 420, and damage to the high-speed feeding adjustment mechanism 400 can be prevented.

  The configuration including the fertilization amount setting panel 200 and the controller 210 according to the above embodiment corresponds to the fertilization amount setting device of the present invention, and the planting clutch case 25 corresponds to an example of the power supply device of the present invention. Further, the swinging fulcrum pin moving long hole 351 corresponds to an example of a long hole parallel to the axial direction of the ball screw of the present invention, and the stroke sensor 440 corresponds to an example of the ball nut detection unit of the present invention. Further, the front end portion 351b of the swinging fulcrum pin moving elongated hole 351 corresponds to an example of the “end of the elongated hole on the other end side of the swinging arm” of the present invention, and one end portion 370a of the feeding transmission arm 370 is This corresponds to an example of the connecting portion of the feeding transmission arm of the present invention. The ultrasonic sensor 1140 corresponds to an example of the depth detection sensor of the present invention.

  Next, in the above configuration, an operation example in which the amount of fertilizer supplied from the feeding unit 61 is adjusted by controlling the rotation of the fertilizer application amount adjustment motor 410 based on an instruction from the controller 210. Will be described.

  Before starting seedling planting work, the operator opens the bonnet 32 and uses the fertilization amount setting panel 200 to set the fertilization amount (here, set to the maximum value) and set the fertilizer reduction. Using the switch 500, the amount of reduced fertilizer when the fertilization amount set on the fertilization amount setting panel 200 is set to 100% is set as 20%, for example. These setting signals are sent to the controller 210 and stored in a predetermined memory (not shown). It is assumed that the swing fulcrum pin 360 always returns to the standard position, that is, the position where the fertilizer application amount is an intermediate value between the maximum value and the minimum value at the time of starting the work. In addition, at the same time as the seedling planting operation is started, the driving force from the planting clutch case 25 is transmitted to the swing arm 350 via the fertilization driving rod mechanism 330.

(Example 1)
When the seedling planting operation is started by the rice transplanter 1 under the above conditions, the controller 210 outputs a rotation start command to the fertilizer application amount adjustment motor 410 and is preset from the fertilizer application amount setting panel 200. The ball screw 420 is rotated at a high speed so that the ball nut 430 moves rearward in accordance with the data for maximizing the amount of fertilization stored in the memory.

  On the other hand, the stroke sensor 440 detects the amount of movement of the ball nut 430 and sends it to the controller 210 at a predetermined timing. The controller 210 determines the detection signal sent from the ball nut 430 at any time, and the swing fulcrum pin 360 connected to the ball nut 430 through the ball nut holding plate 431 has a rear end portion of the guide long hole 356. When it is detected that the value 356a has been reached, a rotation stop command is output to the fertilization amount adjustment motor 410.

  Accordingly, as shown in FIG. 5, the swing arm 350 swings in the vertical direction with the swing fulcrum pin 360 positioned at the rear end portion 356a of the guide slot 356 as the swing fulcrum. The reciprocating distance of the transmission arm 370 in the vertical direction is maximized, the rotational distance of the one-way clutch mechanism 390 is also maximized, and the amount of fertilizer supplied from the feeding unit 61 is adjusted to the maximum.

(Example 2)
During normal planting work, the above operation is performed, but if the controller 210 receiving the signal from the GPS receiver 1130 determines that the rice transplanter 1 has moved to the headland (farm field edge), the pillow planting is performed. At the same time, a rotation start command is output to the fertilizer application amount adjustment motor 410 so as to spray the fertilizer application amount reduced by 20% based on the fertilizer application amount that has been set in accordance with the preset fertilizer reduction set amount. The fertilizer application adjusting motor 410 starts high-speed rotation based on the rotation start command, and the swing fulcrum pin 360 connected to the ball nut 430 via the ball nut holding plate 431 is provided with a guide slot 356. It moves toward the front end 356b side.

  Then, while the controller 210 determines the detection signal sent from the ball nut 430 at any time, the swing fulcrum pin 360 connected to the ball nut 430 via the ball nut holding plate 431 is 20 When it is detected that the position of the guide slot 356 corresponding to the amount reduced by% fertilization has been reached, a rotation stop command is output to the fertilizer application amount adjustment motor 410.

Thereby, when the rice transplanter 1 transplants a pillow in a headland, the fertilizer reduction for preventing lodging when a rice grows can be implemented automatically.

  In addition to the above configuration, for example, the fertilizer reduction setting switch 500 is configured so that “normal planting mode” and “angle changing planting (pillow planting) mode” can be manually selected by providing a switch or the like. By setting the switch operation to be prioritized over the headland coordinate detection of the GPS receiver 1130, for example, if “normal planting mode” is selected, 20% fertilizer reduction is set as described above. However, even if the controller 210 detects the movement to the headland by the reception signal from the GPS receiver 1130, the pillow planting is started, but the control of not performing the fertilization can be performed.

(Example 3)
Further, at the time of normal planting work, for example, fertilizer concentration detection that detects the fertilizer concentration by measuring the electrical resistance of the muddy water in the field using the electrode plates 1100 (see FIG. 1) arranged on the pair of left and right front wheels 10, 10. When the detection signal of the fertilizer concentration detected by the sensor 1110 is sent to the controller 210, if the controller 210 determines from the detection signal that the fertilizer concentration in the field is higher than a predetermined reference, the amount of fertilizer supplied from the feeding unit 61 is determined. In order to reduce the amount from the set amount, the fertilization amount adjustment motor 410 is rotated at a high speed, and the swing fulcrum pin 360 is moved to the front end portion 356b side of the guide long hole 356.

  Thereby, the fertilizer application amount preset by the operator can be automatically changed according to the field conditions.

(Example 4)
Further, in addition to the detection result of the fertilizer concentration detection sensor 1110, the ultrasonic sensor 1140 is also used to detect the depth of muddy water, so that the fertilizer concentration in the field can be detected more accurately based on both detection results. The position of the oscillating fulcrum pin 360 may be controlled so that the fertilizer application amount preset by the operator is automatically and accurately changed according to the field conditions.

(Example 5)
In addition, since there is usually a relatively soft mud layer (field topsoil) at the bottom of the field, in the configuration in which the ultrasonic sensor 1140 is used to detect the depth of the mud, it is relatively hard under the soft mud layer. The distance from the surface of the soil layer to the surface of the muddy water is detected, and the distance from the surface of the field top soil to the surface of the muddy water that is originally desired to be detected cannot be measured. The front wheel 10 travels on the surface of a relatively hard soil layer.

  Therefore, in addition to the detection result of the ultrasonic sensor 1140, the detection result of the elevation angle control sensor 1141 (float sensor) provided in the center float 55, the detection result of the link sensor 1142 that detects the elevation position of the planting device 4, and Is taken into account, the distance from the surface of the field topsoil to the surface of the muddy water can be obtained.

  Here, FIG. 7 shows that the distance from the surface of the field topsoil to the muddy water surface can be obtained by using the detection results of the ultrasonic sensor 1140, the elevation angle control sensor 1141, and the link sensor 1142 of the present embodiment. It is a schematic diagram explaining a reason.

  That is, as shown in FIG. 7, when the position of the seedling planting part 52 is known from the detection result of the link sensor 1142, the position B serving as a reference for detection by the elevation control sensor 1141 in the center float 55 is the seedling planting part. 52 is determined in advance, it can be seen that the position B is at the height h from the lower end surface of the rear wheel 11.

  Further, it can be seen from the detection result of the elevation angle control sensor 1141 that the distance between the surface of the field topsoil and the position B is.

  From this, the thickness a of the relatively soft mud layer can be calculated by the following equation 1.

一方、超音波センサー１１４０の検知結果から、比較的軟らかい泥の層の下にある比較的硬い土の層の表面から泥水の水面までの距離ｄは、上述した通り検知出来る。

On the other hand, from the detection result of the ultrasonic sensor 1140, the distance d from the surface of the relatively hard soil layer under the relatively soft mud layer to the muddy water surface can be detected as described above.

  Therefore, from the detection results of these various sensors, the distance b from the surface of the field topsoil to the muddy water surface can be calculated by the following equation 2.

これにより、作業者が予め設定した施肥量を、圃場の状況に応じて自動的に更により精度良く変更することが出来る。

Thereby, the fertilizer application amount set in advance by the operator can be automatically and more accurately changed according to the field conditions.

(Example 6)
In addition, when the planting work described above is completed and the rice transplanter 1 moves out of the field, when the tilt detection sensor 1120 detects that the traveling vehicle body 2 is in a forward rising tilt state of a predetermined angle or more, the controller 210 may be configured to operate the fertilization amount adjusting motor 410 to move the position of the swing fulcrum pin 360 to a position where the fertilization amount becomes the standard amount (standard position).

  As a result, when the forward rising inclination angle of the traveling vehicle body 2 is equal to or greater than a predetermined angle, the position of the swing fulcrum pin 360 is automatically moved to the standard position (default position), so that the work of the previous field is performed in the next field. Since it is possible to prevent the work from being started with the fertilizer applied at the end, it is difficult for the fertilizer applied to be excessive or insufficient, and the growth of the crop is stabilized.

  When the inclination detection sensor 1120 detects that the forward rising inclination angle of the traveling vehicle body 2 is equal to or greater than a predetermined angle, and further detects that the planting device 4 is raised, the position of the swing fulcrum pin 360 is standardized. It may be configured to automatically move to a position (default position).

  Thereby, compared with the configuration using only the detection result of the tilt detection sensor 1120, a control error due to erroneous detection can be prevented.

  Next, the storage configuration of the controller 210 will be described with reference to FIGS. 8A and 8B.

  FIG. 8A is a schematic view of the rice transplanter 1 viewed from the front, and FIG. 8B is a schematic view of the bonnet 32 portion of the rice transplanter 1 viewed from the left side. For convenience, the inside of the bonnet 32 is shown in a state where a part of the surface is broken, so that the inside can be seen.

  As shown in FIGS. 8 (a) and 8 (b), a frame 220 is formed in a loop shape in the bonnet 32, and a controller 210 is accommodated vertically and fixed so as to be removable.

  With this configuration, the controller 210 can be stored compactly and can be easily taken out, so that maintenance can be improved.

  Next, the storage configuration of the battery 230 will be described with reference to FIG.

  FIG. 9 is a schematic view viewed from the left side with the driver's seat portion of the rice transplanter 1 as the center.

  Here, in correspondence with the storage configuration of the controller 210 described with reference to FIGS. 8A and 8B, the battery 230 that is conventionally stored in the hood 32 is stored in the back side of the lifting step 240. The configuration.

  With this configuration, a storage space inside the hood 32 can be secured, and the controller 210 can be stored using the storage space.

  Next, the storage configuration of the tablet terminal 250 will be described with reference to FIGS. 10 and 11.

  FIG. 10A is a schematic front view of the rice transplanter 1 for explaining the storage configuration of the tablet terminal 250, and FIG. 10B is a rice transplanter for explaining the storage configuration of the tablet terminal 250. FIG. 10C is a perspective view of the tablet terminal storage case 260. FIG.

As shown in FIGS. 10A and 10B, a tablet terminal storage case 260 for storing the tablet terminal 250 is arranged on the opposite side of the HST operation lever 24 from a seedling box (not shown) for a spare seedling or a spare seedling. The storage case 270 for storing the seedling collection plate 271 and the spare seedling frame 38 are fixed to the upper short side 280a of the long rectangular frame 280, and the display portion 250a of the tablet terminal 250 is displayed. It is configured to be retractable in the vertical direction toward the driver's seat 31 side. That is, the upper end surface of the tablet terminal storage case 260 is fully opened so that the tablet terminal 250 can be inserted, and the surface on the driver's seat 31 side is the lower edge so that the display portion 250a of the tablet terminal 250 is exposed. The central part is cut away, leaving the frame part and the left and right edge parts in a frame shape.

  The long rectangular frame 280 is supported and fixed by a frame fixing column 285 that is erected and fixed to the front end frame 290 of the traveling vehicle body 2.

  With this configuration, the tablet terminal 250 can be stored in a place where it does not interfere with rice transplanting work, and can be attached and detached with a single touch, improving workability. Further, during the work, the tablet terminal 250 can be confirmed while operating the HST operation lever 24, and workability can be improved.

  In addition, although FIG. 10 demonstrated the case where the tablet terminal storage case 260 was a fixed structure, it is not restricted to this, For example, as shown in FIG. 11, you may be comprised so that rotation is possible. Here, FIG. 11A is a schematic front view of the rice transplanter 1 for explaining the movable storage configuration of the tablet terminal 250, and FIG. 11B is a perspective view of the movable tablet terminal storage case 261. .

  That is, as shown in FIG. 11, a rotating support column 262 is provided on the upper short side 280 a of the long rectangular frame 280 so as to be rotatable, and a movable type is provided at the upper end of the rotating support column 262. A tablet terminal storage case 261 is fixed.

  The tablet terminal 250 is stored in the same manner as the tablet terminal storage case 260 of FIG.

  With this configuration, in normal times, the movable tablet terminal storage case 261 in FIG. 11 is used at the storage position S indicated by the solid line, so that it does not interfere with the work, and if necessary, in FIG. If the movable tablet terminal storage case 261 is rotated to the confirmation position P indicated by the two-dot chain line, the operator can work while confirming the display surface 250a of the tablet terminal 250 from the driver's seat 31, thereby improving workability. Can be planned.

  In addition, the movable tablet terminal storage case 261 is arranged in the same manner as the movable tablet terminal storage case 261 in a state where the storage case 270 stores a seedling box (not shown) for a spare seedling and a seedling collecting plate 271 for scooping the spare seedling. Since it is arranged at a position that does not hinder movement and visibility, even when the seedling box and the seedling collecting plate 271 are stored in the storage case 270, the visibility of the tablet terminal 250 can be ensured, and workability can be improved.

  Next, the configuration of the electrode plate 1100 will be described with reference to FIGS.

  Fig. 12 (a) is a schematic side view of the front wheel 10 of the rice transplanter 1 of the present embodiment, that is, a view of the front wheel 10 viewed in the direction of arrow C shown in Fig. 12 (b). FIG. 3 is a schematic sectional view of the front wheel 10.

  As shown in FIGS. 12A and 12B, the front wheel 10 includes a boss portion 1111 and a front wheel rim portion 1113 having a tire 1112 connected by three spokes 1114, and the outer side of the front wheel 10. A foil cap 1115 that covers the inner space of the tire 1112 is attached by a fastening member 1116. The electrode plate 1100 is a ring-shaped plate-like member disposed on the inner side of the front wheel 10 so as to be opposed to the circumferential portion of the foil cap 1115, the electrode plate main body 1101 parallel to the foil cap 1115, and its electrode The plate body 1101 includes a mudguard cover 1102 that extends from the inner peripheral side of the plate body 1101 to the foil cap 1115 while being bent in a “h” shape, and is fixed by the same fastening member 1116 as the foil cap 1115. ing. However, the same fastening member 1116 is used, but the electrode plate 1100 and the foil cap 1115 are not electrically connected.

  When the foil cap 1115 is made of metal or a conductive material (e.g., conductive plastic), if the fastening member 1116 is conductive, the electrode plate 1100 and the foil cap 1115 In this case, the fastening member 1116 is made of a non-conductive resin, or is coated with a non-conductive material, so that the electrode plate 1100 and the foil cap 1115 It is set as the structure by which electricity is not conducted between.

  The conventional electrode plate is composed of the electrode plate main body 1101 described above, and the mudguard cover 1102 is provided with a collar member (not shown) which is a separate member, but FIG. 12 (b), the mudguard cover 1102 of the electrode plate 1100 can prevent mud from accumulating between the foil cap 1115 and the electrode plate 1100. A color member is not required, and the cost can be reduced.

  In addition, for a user who uses in a shallow field where the amount of submergence of the front wheel 10 is small, an insulator is applied or pasted on the surface 1102a of the mudguard cover portion 1102, that is, the surface on the boss portion 1111 side.

  Accordingly, when the fertilizer application amount adjustment is automatically performed, insulation can be performed, so that the electrode plate main body 1101 and the mudguard cover 1102 are energized, and the detection result is different from that when only the electrode plate main body 1101 is energized. It is not detected and malfunction can be prevented.

  Further, in a shallow field where the amount of submergence of the front wheel 10 is small, it is not necessary to insulate the mudguard cover 1102 so that the manufacturing cost can be reduced.

  On the other hand, in a deep farm where the amount of submersion of the front wheel 10 is large, the mudguard cover 1102 is always submerged, and water containing fertilizer components can easily enter from the gap, so that the mudguard cover 1102 can reach the back surface. Insulation treatment is required.

  For the user who uses in such a field, instead of the above configuration, the back surface 1101b of the electrode body main body 1101 and the front surface 1102a and the back surface 1102b of the mudguard cover unit 1102, that is, the mudguard cover unit 1102 In addition to the surface 1102a, an insulator is applied or pasted on the entire surface of the electrode plate 1100 on the front wheel rim 1113 side.

  As a result, when the fertilization amount is automatically adjusted, some mud may enter through the gap between the electrode plates 1100 when entering the field, and the mud remains between the foil cap 1115, but the back surface 1102b is insulated. Since the body is provided, erroneous detection by the electrode plate 1100 can be prevented.

  In addition, as a user, it is only necessary to use an airframe that has been subjected to an insulation process in accordance with the field (shallow field or deep field) used by the user, so that it is not necessary to perform the insulation process each time.

  Further, as shown in FIGS. 13 (a) and 13 (b), from a part of the inner peripheral edge of the tire 1112 of the front wheel 10, that is, the inner clearance between the electrode plate 1100 and the spoke 1114, and the outer Rubber extending members 1112a and 1112b made of rubber are formed to extend from the portion corresponding to the gap. Here, FIG. 13 (a) is a schematic side view of the front wheel 10 of the rice transplanter 1 of the present embodiment, that is, a view of the front wheel 10 viewed in the direction of arrow C shown in FIG. 13 (b). FIG. 2B is a schematic sectional view of the front wheel 10.

  Thereby, the insulation between the front wheel 10 and the electrode plate 1100 can be configured at low cost.

  Further, as shown in FIG. 12B, the front wheel drive shaft 1330 rotatably supported in the lower gear case 1320 connected to the front axle 1300 via the upper gear case 1310 has a stationary harness 1340 and A spring 1350 for electrically connecting the rotation side harness 1341 is fixed. One end of the spring 1350 is connected to one end of the rotating harness 1341, and the other end of the spring 1350 is always pressed against the inner wall surface of the lower gear case 1320 by the elastic force of the spring 1350. Therefore, it is in electrical contact with the inner wall surface of the lower gear case 1320.

  In addition, one end of the stationary harness 1340 is electrically connected to the inner wall surface of the lower gear case 1320, and the other end passes through the stationary harness guide pipe 1360 and is electrically connected to the controller 210 side. It is.

  On the other hand, as shown in FIG. 12B, one end side of the rotating side harness 1341 is electrically connected to one end side of the spring 1350 as described above, and the other end side of the rotating side harness 1341 is It passes through a through-hole 1331 formed inside the front wheel rotation shaft 1330, passes through the rotation harness guide pipe 1361, and is electrically connected to the electrode plate body 1101 of the electrode plate 1100. Here, the rotating harness guide pipe 1361 is disposed along the spoke 1114, and one end thereof is inserted into the guide pipe fixing collar member 1370 fixed to the outer peripheral surface of the front wheel drive shaft 1330, and the other end thereof. It is fixed to the spoke 1114.

  With this configuration, the rotation-side harness 1341 can be guided without damaging the rotation-side harness 1341, and the disassembling work can be performed. Therefore, the maintainability can be improved. Further, since the rotating harness guide pipe 1361 is disposed along the spoke 1114 and integrated with the spoke 1114, mud resistance is reduced.

  Further, as shown in FIG. 12B, the lower end portion of the stationary harness guide pipe 1360 is fixed to the upper end surface of the outer wall of the lower gear case 1320 that is disposed below the front wheel rim portion 1113. Further, a bellows-like portion 1360a that can be flexibly moved is provided above the front wheel rim portion 1113 of the stationary harness guide pipe 1360.

  With this configuration, it is possible to smoothly follow the rotation of the front wheel 10 in the left-right direction.

  Further, in FIG. 12B, the rotating harness guide pipe 1361 has been described as having a configuration in which one end thereof is inserted into the guide pipe fixing collar member 1370 fixed to the outer peripheral surface of the front wheel drive shaft 1330. Not limited to this, for example, as shown in FIG. 14, it may be configured to be inserted into a fixed boss 1380 integrated with the boss portion 1111. Thereby, fixation to the front-wheel 10 side of the rotation side harness 1341 is stabilized. Here, FIG. 14 is a schematic sectional view of the front wheel 10 for explaining the fixed boss 1380.

  In addition, in the said embodiment, although the structure which mounted the fertilizer application of this invention in the rice transplanter was demonstrated, it is not restricted to this, For example, if it is an agricultural machine in which fertilization work is possible, it is applicable to what. Yes, the same effect as described above.

  In the above-described embodiment, the configuration using the GPS receiver 1130 for detecting the headland has been described. However, the configuration is not limited thereto, and for example, by detecting a 90-degree turning operation of the traveling vehicle body 2 by a handle potentiometer. Further, it may be configured to detect that it is at the headland work position.

  In the above embodiment, the configuration using the stroke sensor 440 as the ball nut detection unit has been described. However, the present invention is not limited to this. For example, any potentiometer or the like that can detect the movement amount or position of the ball nut. A simple configuration may be used.

  Since the fertilizer application according to the present invention can automatically adjust the fertilizer application amount, it is useful as an apparatus that can be mounted on an agricultural machine such as a rice transplanter.

DESCRIPTION OF SYMBOLS 1 Rice transplanter 2 Traveling vehicle body 3 Lifting link device 4 Planting device 10 Front wheel 11 Rear wheel 11a Rear wheel rotation sensor 12 Mission case 13 Front wheel final case 15 Main frame 18 Rear wheel gear case 20 Engine 20a Engine sensor 21 Belt transmission device 22 Brake pedal 22a Pedal sensor 23 HST (hydrostatic stepless transmission)
23a Opening sensor 24 HST operation lever 24a Lever potentiometer 25 Planting clutch case 25a Crank arm 26 Planting transmission shaft 27a First leveling rotor 27b Second leveling rotor 30 Engine cover 31 Driver's seat 32 Bonnet 33 Mounting stay 34 Steering handle 35 Floor Step 36 Motor for hopper rotation 37 Fertilizer detection sensor 38 Preliminary seedling frame 40 Upper link 41 Lower link 42 Link base frame 43 Vertical link 44 Connecting shaft 45 Link sensor 46 Lifting hydraulic cylinder 47 Fixed plate 48 Machine body side frame 49 Fertilizer side frame 49a Patchon lock 50 Planting transmission case 51 Seedling stand 51a Seedling outlet 51b Seedling feeding belt 52 Seedling planting part 52a Seedling planting tool 55 Center float 56 Side pad 58 Feed amount adjusting rod support plate 59 Hopper tilt sensor 60L Left manure hopper 60R Right manure hopper 60a Lid 61 Feeding part 61a Discharge port 62 Fertilization hose 63 Fertilizer guide 64 Groove body 65 Support frame 65a Support roller 66 Electric for blower Motor 67 Blower 68 Air chamber 73A First feeding roll 73B Second feeding roll 74 Recessed portion 75 Feeding shaft 75a Square shaft portion 76 Brush 100 Fertilizer 200 Fertilizer setting panel 210 Controller 220 Frame 230 Battery 240 Lifting step 250 Tablet terminal 260 Tablet terminal Storage case 261 Movable tablet terminal storage case 270 Seedling plate storage case 280 Long rectangular frame 290 Tip frame 300 Fertilization transmission mechanism 310L, 3 0R feeding rotation shaft 330 fertilization drive rod mechanism 331 main drive rod 332 relay rod 333 sub drive rod 334 swing connection plate 334a swing connection fulcrum pin 350 swing arm 350a swing arm one end 350b swing arm other end Part 351 Swing fulcrum pin moving long hole 355 Guide plate 356 Guide long hole 357 Swing arm connecting plate 360 Swing fulcrum pin 370 Feeding transmission arm 380 Feeding input arm 390 One-way clutch mechanism 391L, 391R One-way clutch rotation Axis 400 High-speed feeding adjustment mechanism 410 Fertilizer adjustment motor 420 Ball screw 430 Ball nut 431 Ball nut holding plate 500 Fertilizer reduction setting switch 1100 Electrode plate 1110 Fertilizer concentration detection sensor 1120 Tilt detection sensor 1130 GPS receiver 1140 A pair of left and right ultrasonic sensors

Claims (2)

A fertilizer concentration detection sensor (1110) that detects the fertilizer concentration in the field by a pair of left and right electrode plates (1100) disposed on the traveling vehicle body (2);
A pair of left and right depth detection sensors (1140) for detecting the depth of a field, a storage hopper (60L, 60R) for storing fertilizer, and the fertilizer supplied from the storage hopper , disposed on the traveling vehicle body (2). A feeding device (61, 300) that feeds out a set amount, a fertilization amount adjusting device (400) that adjusts a fertilizing amount fed out from the feeding device, and a fertilizer that sets the fertilizing amount for the fertilizing amount adjusting device An amount setting device (200, 210), and a fertilization amount adjustment motor (410) driven based on an instruction from the fertilization amount setting device (200, 210) ,
Based on the detection result of the fertilizer concentration detection sensor (1110) and the detection result of the depth detection sensor (1140), the fertilizer application amount adjustment motor (410) is operated.
The left and right pair of depth detection sensors (1140) are arranged on the front side and the outside of the left and right front wheels (10) of the traveling vehicle body (2), respectively.
The electrode plate (1100) is attached to the left and right front wheels (10),
A foil cap (1115) is provided on the outside of the front wheel (10), and a part of the inner peripheral edge of the tire (1112) of the front wheel (10 ) is provided between the electrode plate (1100) and the spoke (1114) . A work vehicle characterized in that insulating extension members (1112a, 1112b) are provided in an inner gap and an outer gap between the spoke (1114) and the foil cap (1115), respectively . A fertilizer device (100) for supplying fertilizer to the traveling vehicle body (2) is provided, and the fertilizer device (100) swings at a swing fulcrum (360) to change the fertilizer amount (350). And a fertilizing amount adjusting device (400) for changing the fertilizing amount by changing the position of the swing fulcrum (360),
The operation according to claim 1, wherein when the swing fulcrum (360) is moved to the end portion on the side where the fertilizer application amount decreases, the fertilizer supply of the fertilizer application device (100) is stopped. vehicle.

Images