JP2020068670A - Work vehicle - Google Patents

Abstract

To enhance operation freedom.SOLUTION: A work vehicle according to an embodiment of the present disclosure comprises a loading part, planting units, a plurality of partial ridge clutches and power on/off mechanism. The loading part loads seedlings in the rear part of a vehicle body. The planting units are arranged side by side in the horizontal direction in the rear part of the vehicle body and plants the seedlings loaded on the loading parts in a field. The plurality of partial ridge clutches correspond to the planting units. The power on/off mechanism operates the plurality of partial ridge clutches. The power on/off mechanism comprises: one operation part for operating a plurality of partial ridge clutches corresponding to planting units arranged on the left side of the vehicle body; and the other operation part for operating a plurality of partial ridge clutches corresponding to planting units arranged on the right side of the vehicle body.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a work vehicle.

  2. Description of the Related Art Conventionally, in a work vehicle such as a seedling transplanter working in a field, a configuration is known in which a plurality of partial-row clutches are operated by a single on / off mechanism (see, for example, Patent Documents 1 to 3).

JP, 2005-027269, A JP, 2014-135901, A JP, 2015-123011, A

  However, in the above-described conventional configuration, for example, when the four partial thread clutches from the first to the fourth are lined up in the left-right direction, the first clutch (or the fourth clutch) located at one of the left and right ends, When operating in the order of first → second → third → fourth (or fourth → third → second → first), for example, when the third clutch is operated, first → second → third It is necessary to operate in sequence like 3 (or 4th → 3rd). Further, for example, it is not possible to perform an operation such that the third clutch is “on” and the other three partial-row clutches are “off”. As described above, the conventional configuration has a low degree of freedom in operation.

  The present invention has been made in view of the above, and an object thereof is to provide a work vehicle capable of improving the degree of freedom in operation.

  In order to solve the above-mentioned problems and to achieve the object, a work vehicle (1) according to claim 1 has a loading section (45) for loading seedlings in the rear part of the machine body and a left-right direction in the rear part of the machine body. A planting device (41) for planting the seedlings loaded on the loading part (45) in a field, a plurality of partial thread clutches (70) corresponding to the planting apparatus (41), and the plurality of partial thread clutches An on / off mechanism (80) for actuating (70), the on / off mechanism (80) actuating a partial clutch (70) corresponding to the planting device (41) arranged on the left side of the machine body. One actuating part (81a) for actuating and another actuating part (81b) for actuating the partial clutch (70) corresponding to the planting device (41) arranged on the right side of the fuselage are provided. To do.

  The work vehicle (1) according to claim 2 is the work vehicle (1) according to claim 1, wherein there are at least three partial thread clutches (70), and the one operating portion (81a) and The other actuating portion (81b) is characterized in that among the partial thread clutches (70), the partial thread clutches (70) that are not adjacent to each other are simultaneously actuated.

  The work vehicle (1) according to claim 3 is the work vehicle (1) according to claim 2, wherein the one actuating portion (81a) and the other actuating portion (81b) are the partial clutch ( 70), a partial clutch (70) corresponding to the planting device (41) arranged at the left end of the airframe and a partial clutch (70) corresponding to the planting device (41) arranged at the right end of the airframe. 70) are simultaneously activated.

  The work vehicle (1) according to claim 4 is the work vehicle (1) according to any one of claims 1 to 3, wherein the one operating portion (81a) and the other operating portion (81b). Is a planting device arranged on the other end side of the fuselage from the partial striation clutch (70) corresponding to the planting device (41) arranged on one end side of the airframe of the partial strip clutch (70). After being operated in order to the partial thread clutch (70) corresponding to (41), the partial thread clutch (70) other than the partial thread clutch (70) corresponding to the planting device (41) arranged on the other end side. ) Is operated from.

  The work vehicle (1) according to claim 5 is the work vehicle (1) according to any one of claims 1 to 4, further comprising: a power transmission unit that transmits power to the planting device (41). The planting device (41) is further provided with a power transmission upstream side, and further includes a speed reduction unit that reduces a transmission amount on a power transmission downstream side of the power transmission unit, and the one operating unit (81a) and the other operating unit (81a). The actuating part (81b) is characterized in that the partial thread clutch (70) is actuated in a state where the transmission amount is reduced by the speed reducing part.

  The work vehicle (1) according to claim 6 is the work vehicle (1) according to any one of claims 1 to 5, wherein the work vehicle (1) is provided in the loading section (45), and the planting device (41). Further provided is a seedling feeding belt (43) for feeding seedlings toward the seedlings, and a fertilizer application device (150) for spraying fertilizer toward the seedlings planted by the planting device (41), and the partial strip clutch (70). , The seedling feeding belt (43) and the fertilizer application device (150) are pulled by wires (71, 72, 73) connected to the seedling feeding belt (43) and the fertilizer application device (150) to operate the on / off state of power transmission, and the partial strip clutch (70). Among the wires, the power transmission is turned on by pulling the wire (71) connected to the partial clutch, and the seedling feeding belt (43) and the fertilizer application device (150) are Of Ya, characterized in that the state contains the power transmission by said seedling feed belt (43) and the fertilizing device (150) that each wire connected (72, 73) is loosened.

  According to the invention described in claim 1, the left partial rail clutch of the machine body and the right partial rail clutch of the machine body can be individually actuated, and the degree of freedom of operation of the partial clutch can be improved. it can. Further, for example, the displacement amount of each operating portion is smaller than that in the case where there is only one operating portion, so that the operation of the partial clutch can be stabilized.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the partial thread clutches that are not adjacent to each other are simultaneously actuated, so that the operation time can be shortened. Further, for example, when four partial thread clutches from the first to the fourth are arranged in order, like the first “ON”, the second “OFF”, the third “ON”, and the fourth “OFF”, It is possible to perform operations that were not possible up to now, such as alternately setting on and off in the left and right directions, and it is possible to improve the degree of freedom in operating the partial clutch.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, since the left end partial rail clutch and the right end partial rail clutch are simultaneously actuated, the operation time can be shortened. it can. Further, for example, when four partial thread clutches from the 1st to the 4th are arranged in order, the setting is as follows: 1st "on", 2nd "off", 3rd "off", 4th "on" By doing so, since the seedlings can be planted with a gap left between them, ventilation and water flow are improved, and the seedlings can be stably grown. Further, as described above, it becomes possible to perform an operation that has not been possible until now, such as setting only the both ends in the left-right direction to “on”, and it is possible to improve the degree of freedom in operating the partial clutch.

  According to the invention as set forth in claim 4, in addition to the effect of the invention as set forth in any one of claims 1 to 3, even when the partial clutch is operated in sequence from one end, it is necessary to return the partial clutch in reverse order from the other end. As a result, the operating time can be shortened, and the degree of freedom in operating the partial clutch can be improved.

  According to the invention as set forth in claim 5, in addition to the effect of the invention as set forth in any one of claims 1 through 4, the partial thread clutch is operated at a position where the amount of transmission is reduced, so that the load applied to the component is increased. Is reduced and the on / off operation is stable.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, the seedling feeding belt and the fertilizer applicator are operated when the partial clutch is in the "on" state. When the seedlings are planted and fertilizers are turned on, the drive is also turned on, and when the partial clutch is turned off, the drive for the seedling feeding belt and fertilizer application is also turned off. When the seedlings are sprayed and the seedlings cannot be planted, the seedlings are not fed or the fertilizer is not sprayed, so that the drive suitable for the work content can be performed.

FIG. 1 is a left side view showing an example of a work vehicle according to an embodiment. FIG. 2 is a plan view showing an example of the work vehicle according to the embodiment. FIG. 3 is a block diagram showing an example of the connection configuration of the partial-strip clutch. FIG. 4 is an explanatory diagram of the on / off mechanism. FIG. 5 is an explanatory diagram (No. 1) of each operation pattern of the left and right operation units. FIG. 6 is an explanatory view (No. 2) of each operation pattern of the left and right operating parts. FIG. 7: is explanatory drawing of the handrail of a preliminary seedling stand. FIG. 8 is (a) an exploded perspective view of the handrail of the spare seedling stand, and (b) a plan view of a pivot fulcrum portion of the handrail. FIG. 9: is explanatory drawing of the modification of the handrail of a preliminary seedling stand. FIG. 10: is explanatory drawing of the handrail of the seedling rail. FIG. 11 is an explanatory view of the vehicle body roof. FIG. 12 is an explanatory diagram of an aze clutch sprocket.

  Hereinafter, embodiments of a work vehicle disclosed in the present application will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments described below.

<Work vehicle 1>
First, an example of the work vehicle 1 according to the embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a left side view showing an example of a work vehicle 1 according to the embodiment. FIG. 2 is a plan view showing an example of the work vehicle 1 according to the embodiment. In addition, below, as the working vehicle 1, a seedling transplanter that travels in the field to plant seedlings in the field will be described as an example.

  Further, in the following, the front-back direction is the traveling direction when the seedling transplanter 1 goes straight, and the front side of the traveling direction is defined as “front” and the rear side is defined as “rear”. The advancing direction of the seedling transplanting machine 1 is a direction from the cockpit 28 toward the steering wheel 32 when going straight (see FIGS. 1 and 2).

  The left-right direction is a direction that is horizontally orthogonal to the front-rear direction, and defines left and right toward the "front" side. That is, the left hand side is the "left" and the right hand side is the "right" in a state in which the operator (also referred to as the "worker") is seated in the operator's seat 28 and is facing forward.

  The up-down direction is the vertical direction. The front-rear direction, the left-right direction, and the up-down direction are orthogonal to each other. Each direction is defined for convenience of description, and the present invention is not limited to these directions. In the following, the seedling transplanting machine 1 may be referred to as a “machine”.

  As shown in FIGS. 1 and 2, the seedling transplanter 1 includes a traveling vehicle body 2 that travels in a field. The traveling vehicle body 2 has a pair of left and right front wheels 4 and a pair of left and right rear wheels 5. Further, the seedling transplanting machine 1 includes a seedling planting section 40 that can be raised and lowered by a seedling planting section elevation mechanism 50 at the rear portion of the traveling vehicle body 2.

  The traveling vehicle body 2 includes a main frame 7, an engine 10 mounted on the main frame 7, and a power transmission mechanism that transmits a driving force of the engine 10 to front wheels 4 and rear wheels 5 (driving wheels) and a seedling planting section 40. And 15. That is, in the seedling transplanting machine 1, the traveling vehicle body 2 is moved forward and backward by the power of the engine 10 and the seedling planting section 40 is driven.

  The engine 10 is arranged substantially at the center of the body in the left-right direction. The engine 10 is mounted on the main frame 7 in a state of being covered by an engine cover 11 and protruding above a floor step 26 on which the operator places his / her feet when riding.

  The floor step 26 is provided between the front part of the traveling vehicle body 2 and the rear part of the engine 10, and is mounted on the main frame 7. A part of the floor step 26 has a lattice shape (see FIG. 2), and mud attached to the shoes of the operator can be dropped on the field.

  A rear step 27 that doubles as a fender for the rear wheels 5 is provided behind the floor step 26. The rear step 27 has an inclined surface that is inclined upward as it goes rearward. The rear step 27 is arranged on each of the left and right sides of the engine 10.

  The seedling transplanter 1 also includes a cockpit 28 and a manipulator 30. The cockpit 28 is arranged above the engine cover 11. The control unit 30 is arranged in front of the control seat 28 and substantially at the center of the body in the left-right direction. The control unit 30 is arranged so as to project upward from the floor step 26, and divides the front portion of the floor step 26 into left and right.

  The control unit 30 is provided with various operating devices and a fuel tank for engine fuel, and the front part of the control unit 30 is provided with a front cover 31 that can be opened and closed. Further, the upper panel 33 of the control unit 30 is provided with operation levers for operating the operation device, various instruments, a steering wheel 32, a notification device, and the like.

  As the operation lever, for example, the operating states of the speed change lever 35, which is a traveling operation member that controls the forward movement and traveling speed of the machine body, and the operation state of the seedling planting section 40 include at least the raising state by the seedling planting section lifting mechanism 50. There is a planting lift lever 36 which is a planting operation member for switching. The planting lifting lever 36 can switch the operating state of the seedling planting unit 40, and can set, for example, each mode such as “up”, “down”, and “planting”.

  Of the left and right sides of the control unit 30 in the floor step 26, for example, on the right side, a seedling rail 130 for sending seedlings (mat seedlings) toward the rear seedling planting unit 40 is provided, and on the left side. Is provided with a spare seedling stand 140 on which supplementary seedlings (spare seedlings) are placed. The preliminary seedling stand 140 is rotatably supported by a support cylinder 141 extending upward from the floor step 26.

  Further, on each of the left and right sides of the machine body, a line drawing marker that forms a line as a guide for the next planting strip in the field scene may be provided. As for the drawing markers, the left and right drawing markers operate alternately each time the machine body turns.

  The power transmission mechanism 15 has a hydraulic continuously variable transmission 16 as a main transmission and a belt type power transmission mechanism 17 for transmitting power from the engine 10 to the hydraulic continuously variable transmission 16. The hydraulic continuously variable transmission 16 is a hydrostatic continuously variable transmission called HST (Hydro Static Transmission). The hydraulic continuously variable transmission 16 is arranged in front of the engine 10 and below the floor step 26.

  The belt type power transmission mechanism 17 includes a pulley attached to an output shaft of the engine 10, a pulley attached to an input shaft of the hydraulic continuously variable transmission 16, a belt wound around these pulleys, and a belt tension. And a tension pulley that adjusts the torque, and transmits the power generated by the engine 10 to the hydraulic continuously variable transmission 16 via a belt.

  Further, the power transmission mechanism 15 has a transmission case 18 that houses a transmission to which the power from the engine 10 is transmitted via the belt-type power transmission mechanism 17 and the hydraulic continuously variable transmission 16. The transmission in the transmission case 18 shifts the power transmitted through the belt-type power transmission mechanism 17 and the hydraulic continuously variable transmission 16 with the auxiliary transmission to drive the traveling power and the seedling planting section 40. Divide into power sources.

  Further, a fertilizer application device is arranged behind the cockpit 28. The fertilizer application device 150 includes a fertilizer hopper 151 for storing fertilizer, a fertilizer feeding unit 152 for feeding the fertilizer in the fertilizer hopper 151 by a fixed amount, and a blower for feeding the fed fertilizer to the seedling planting unit 40 side by a fertilizer hose 154. 153 and.

<Seedling planting section 40>
Here, the seedling planting unit 40 will be described. As shown in FIGS. 1 and 2, the seedling planting unit 40 is vertically movably connected to the rear portion of the traveling vehicle body 2 via a seedling planting unit lifting mechanism 50.

  The seedling planting part elevating mechanism 50 has an elevating link 51. The elevating link 51 has a link member that is a parallel link mechanism that connects the rear portion of the traveling vehicle body 2 and the seedling planting portion 40. The link member has two members extending in the front-rear direction. The two members are an upper link 53, which is an upper link member located on the upper side, and a lower link 54, which is located on the lower side of the upper link 53. Both the upper link 53 and the lower link 54 are provided as a left and right pair.

  The upper link 53 and the lower link 54 are rotatably connected to a link base frame 55, which is a rear-view portal type rear frame that is erected on the rear portion of the main frame 7, and the upper link 53 and the lower link 54 are rotatably connected. The other end side is rotatably connected to the seedling planting section 40, and the seedling planting section 40 is connected to the traveling vehicle body 2 in a vertically movable manner.

  The seedling planting part elevating mechanism 50 has an elevating cylinder 56 that expands and contracts by hydraulic pressure. The seedling planting part elevating mechanism 50 raises and lowers the seedling planting part 40 by the expansion and contraction operation of the elevating cylinder 56. The seedling planting part elevating mechanism 50 raises the seedling planting part 40 to the non-working position. Further, the seedling planting section elevating mechanism 50 lowers the seedling planting section 40 to the ground work position (ground planting position).

  The seedling planting unit 40 plants a range for planting seedlings with a plurality of rows. In the present embodiment, the seedling planting section 40 is a so-called eight-row planting in which the seedlings are planted with eight rows.

  In addition, the seedling planting section 40 includes a planting apparatus 41, a loading section 45, and a center float 61 and a side float 62 that constitute a leveling apparatus that evens the field scene. One planting device 41 is arranged for every two rows, and each has two planting claws 42. The driving power to the seedling planting section 40 is transmitted from the engine 10 via a shaft (not shown). In the planting device 41, the planting claw 42 is driven by the rotation of the drive shaft arranged inside the pipe extending in the left-right direction of the machine body.

  The loading section 45 has seedling placement surfaces that are partitioned in the left-right direction of the machine body and correspond to the number of planting lines. In the loading section 45, mat-shaped seedlings with soil are placed on their respective seedling placement surfaces. Thereby, every time a seedling placed on the seedling mounting surface of the loading section 45 is planted and lost, for example, an operator does not have to return to take the seedling out of the field, and the work can be continuously performed. Work efficiency is improved.

<Partial clutch 70>
Next, the partial thread clutch 70 will be described with reference to FIG. FIG. 3 is a block diagram showing an example of a connection configuration of the partial-strip clutch 70. 3 is a schematic view (schematic plan view) of the planting device 41 and the like when viewed from above. The seedling transplanter 1 (see FIGS. 1 and 2) includes a plurality of partial-row clutches 70 that transmit power to the planting device 41 so that the power can be turned on and off.

  The plurality of partial-line clutches 70 is at least three and corresponds to the planting device 41. As shown in FIG. 3, in the present embodiment, the four partial clutches 70 correspond to the four planting devices 41 (first planting device 41a to fourth planting device 41d) (first part). The line clutch 70a to the fourth partial line clutch 70d) are provided.

  The seedling planting section 40 (see FIGS. 1 and 2) is, as described above, an eight-row planting and further has a planting transmission case 46 that also serves as a frame. The rear part of the planted transmission case 46 is branched into four parts, and the rotary case 47 is provided at each rear end part of the branched part. The aforementioned planting claw 42 is attached to the rotary case 47.

  The 1st partial-row clutch 70a-the 4th partial-row clutch 70d are respectively configured to individually control the planting of seedlings for each of the first planting device 41a to the fourth planting device 41d for planting seedlings for two rows. To be done. That is, the 1st planting device 41a, the 2nd planting device 41b, the 3rd planting device by the 1st partial thread clutch 70a, the 2nd partial thread clutch 70b, the 3rd partial thread clutch 70c, and the 4th partial thread clutch 70d. Power transmission to and from 41c and the fourth planting device 41d is switched on and off.

  Further, the first partial thread clutch 70a to the fourth partial thread clutch 70d are connected to the on / off mechanism 80 by a clutch wire 71 (first clutch wire 71a to fourth clutch wire 71d), respectively. Then, the first clutch wire 71a, the second clutch wire 71b, the third clutch wire 71c, and the fourth clutch wire 71d are pulled by the on / off mechanism 80, so that the corresponding first partial-thread clutch 70a and second clutch wire 71a The first planting device 41a, the second part-to-part clutch 70b, the third part-part clutch 70c, and the fourth part-part clutch 70d are "off" and correspond to the first part-part clutch 70a to the fourth part-part clutch 70d. Power transmission to the planting device 41b, the third planting device 41c, and the fourth planting device 41d is cut off.

  The on / off mechanism 80 has an actuating portion 81 that actuates the partial clutch 70. The operating portion 81 has one operating portion 81a and the other operating portion 81b. One actuating portion 81a is a first portion corresponding to the first planting device 41a and the second planting device 41b arranged in the left part (left side of the center in the left-right direction) of the airframe of the planting device 41. The thread clutch 70a and the second partial thread clutch 70b are operated. That is, one actuating portion (hereinafter, referred to as “left actuating portion”) 81a turns on and off the power transmission to the first partial thread clutch 70a and the second partial thread clutch 70b.

  The other actuating portion 81b is a third portion corresponding to the third planting device 41c and the fourth planting device 41d arranged in the right part (rightward of the center in the left-right direction) of the machine body of the planting device 41. The thread clutch 70c and the fourth partial thread clutch 70d are operated. That is, the other actuating portion (hereinafter, referred to as “right actuating portion”) 81b turns on and off the power transmission to the third partial clutch 70c and the fourth partial clutch 70d. The specific configuration of the left and right actuating portions 81a and 81b will be described later with reference to FIG.

  In this way, the left actuation portion 81a and the right actuation portion 81b can simultaneously actuate the partial strip clutches 70 that are not adjacent to each other among the four partial strip clutches 70. For example, the left actuation unit 81a corresponds to the first planting device 41a arranged at the left end of the fuselage, and the first partial thread clutch 70a, and the right actuation unit 81b causes the fourth planting arranged at the right end of the fuselage. The fourth partial clutch 70d corresponding to the device 41d can be activated simultaneously.

  Further, the seedling transplanting machine 1 (see FIGS. 1 and 2) includes an on / off operation section 20 for operating the on / off mechanism 80. The on / off operation unit 20 is, for example, a plurality of push button switches (hereinafter, referred to as “operation buttons”) 21. The operation button 21 is provided on the control unit 30 (see FIGS. 1 and 2), for example.

  As shown in FIG. 3, the operation buttons 21 are four buttons, that is, a first button 21a to a fourth button 21d. The first button 21a to the fourth button 21d are pressed when the first partial thread clutch 70a to the fourth partial thread clutch 70d are turned on and off, and when the first button 21a is pressed by the operator, the first partial thread clutch 70a. When the second button 21b is pressed, the second partial thread clutch 70b is turned on and off, when the third button 21c is pressed, the third partial thread clutch 70c is turned on and off, and when the fourth button 21d is pressed, the fourth button 21d is pressed. The partial thread clutch 70d is turned on and off.

  Further, the first button 21a to the fourth button 21d are pushed by the operator to set the first partial thread clutch 70a to the fourth partial thread clutch 70d in the "on" state, and the first partial thread clutch 70a to the fourth button. When the partial thread clutch 70d is in the "on" state, the first partial thread clutch 70a to the fourth partial thread clutch 70d are in the "disengaged" state by being pushed again by the operator.

  Here, so far, when the first partial thread clutch 70a to the fourth partial thread clutch 70d are turned on and off by the first button 21a to the fourth button 21d, for example, in order from the first button 21a arranged at the left end, or The first partial thread clutch 70a to the fourth partial thread clutch 70d cannot be turned on and off unless they are pressed in reverse order from the fourth button 21d arranged at the right end.

  Therefore, for example, in order to put the third partial thread clutch 70c in the “on” state, first, the first button 21a is pressed, and then the second button 21b is pressed, so that the first partial thread clutch 70a and the second partial clutch It is necessary to set the third clutch 70c to the "on" state by pressing the third button 21c after setting the clutch 70b to the "on" state. Further, in order to put the third partial thread clutch 70c into the "on" state, the first partial thread clutch 70a and the second partial thread clutch 70b need to be in the "on" state. Only the clutch 70c cannot be put in the "on" state. That is, until now, the degree of freedom in operating the partial clutch 70 has been low. In the present embodiment, the on / off mechanism 80 and the actuating portion 81 are configured so that the degree of freedom in operating the partial clutch 70 can be improved.

<On / off mechanism 80 and operating part 81>
Next, the on / off mechanism 80 and the operating portion 81 will be described with reference to FIGS. 4, 5 and 6. FIG. 4 is an explanatory diagram of the on / off mechanism 80, and is a rear view of the on / off mechanism 80. 5 and 6 are explanatory diagrams of respective operation patterns of the left and right actuating portions 81a and 81b, and are rear views of the left and right actuating portions 81a and 81b.

  As shown in FIG. 4 and as described above, the on / off mechanism 80 has the actuating portion 81 for actuating the partial-strip clutch 70. The operating portion 81 has a rotating cam 811, and a pair of arm portions 812 and 813. The rotating cam 811 is a disc cam that is rotatable around a fulcrum 814. The rotating cam 811 has a cam groove 815 in which a sliding pin 817 described later slides. The cam grooves 815 are a pair of grooves that are curved so as to bulge outward following the outer peripheral shape of the rotating cam 811, and are also formed so that one pair faces each other.

  Each of the pair of arm portions 812 and 813 is rotatable around a rotation fulcrum 816, and has a sliding pin 817 inserted into the cam groove 815 at the base end portion. Further, the clutch wire 71 is connected to the respective base end portions of the pair of arm portions 812 and 813. In addition, a drive unit of the seedling feeding belt 43 (see FIG. 2) of the loading unit 45 (see FIGS. 1 and 2) on which the seedlings are placed in the seedling planting unit 40 is provided at the tip of each of the pair of arms 812 and 813. To the fertilizer application device 150 (see FIGS. 1 and 2).

  For example, as shown in part A of FIG. 4, the actuating portion 81 slides and displaces in the cam groove 815 in which the sliding pin 817 rotates by the rotation of the rotating cam 811. Along with this, the base end pulls the clutch wire 71, and brings the corresponding partial thread clutch 70 (see FIG. 3) into the “on” state. Further, when the rotating cam 811 further rotates, the operating portion 81 slides and displaces in the rotating cam groove 815 of the sliding pin 817, and the distal end portion is pulled to loosen the clutch wire 71. , The corresponding partial thread clutch 70 is put into the “disengaged” state.

  Further, the actuating unit 81 sets the drive of the seedling feeding belt 43 and the drive of the fertilizer application device 150 to the “OFF” state by pulling the wires 72, 73 by the tips of the arm units 812, 813, and the wires 72, 73 are removed. By being loosened, the drive of the seedling feeding belt 43 and the drive of the fertilizer application device 150 are set to the “off” state. Since the seedling feeding belt 43 does not operate the planting claws 42 (see FIG. 1) even when the seedlings are fed, the drive of the seedling feeding belt 43 corresponding to the partial clutch 70 in the “OFF” state is in the “OFF” state. And Further, the fertilizer application device 150 does not need to spray fertilizer when the seedlings are not planted, so the drive of the fertilizer application device 150 corresponding to the partial clutch 70 in the “disconnected” state is set to the “disconnected” state. ..

  According to such a configuration, when the partial-row clutch 70 is in the “on” state, the drive of the seedling feeding belt 43 and the fertilizer application device 150 is also in the “on” state, and when the partial-row clutch 70 is in the “off” state. Since the driving of the seedling feeding belt 43 and the fertilizer application device 150 is also in the “OFF” state, seedling feeding and fertilizer spraying are performed when the seedlings are planted, and seedling feeding and fertilizer feeding are performed when the seedlings are not planted. The drive suitable for the work content can be performed without spraying.

  Further, the on / off mechanism 80 has a base portion 82. The actuating portion 81 is attached to the attachment surface 821 of the base portion 82, and the left and right actuating portions 81a and 81b, which are the actuating portion 81, are arranged symmetrically in the left-right direction. That is, the left and right rotating cams 811a, 811b and the left and right (pair) arm portions 812a, 812b, 813a, 813b in the left and right actuating portions 81a, 81b are arranged symmetrically in the left and right direction.

  Here, each operation pattern of the left and right actuating portions 81a and 81b will be described with reference to FIGS. 5 and 6. In FIG. 5, the operation of the left and right rotary cams 811a and 811b and the pair of arm portions 812a, 812b, 813a and 813b when the first partial clutch 70a to the fourth partial clutch 70d are sequentially operated. FIG. 6 shows the left and right turning cams 811a and 811b and the pair of arm portions 812a, 812b, 813a and 813b when the fourth partial clutch 70d to the first partial clutch 70a are operated in reverse order. Shows the operation of.

  As shown in FIG. 5 (a), when all of the first partial clutch 70a to the fourth partial clutch 70d are in the "on" state, that is, in the "all-track" state, the pair of left and right arm portions 812a, 812b are provided. , 813a, 813b pull the clutch wire 71 (first clutch wire 71a to fourth clutch wire 71d).

  As shown in FIG. 5B, when only the first partial clutch 70a is in the “off” state, the first button 21a (see FIG. 3) is pressed (the first button 21a is pressed and the first button 21a is pressed). When the partial clutch 70a is in the “on” state, the right rotation cam 811b rotates by pressing the first button 21a again, and the base end of the right arm portion 812b is displaced to the first position. Loosen only the clutch wire 71a. Further, as shown in FIG. 5C, when the first partial thread clutch 70a and the second partial thread clutch 70b are in the “off” state, the second button 21b (see FIG. 3) is pressed to rotate right. The cam 811b further rotates, and the base end of the right arm 813b is displaced to loosen the second clutch wire 71b in addition to the first clutch wire 71a.

  Further, as shown in FIG. 5D, when the first partial thread clutch 70a, the second partial thread clutch 70b, and the third partial thread clutch 70c are in the “off” state, the third button 21c (see FIG. 3) is pressed. When pushed, the left rotation cam 811a rotates, and the base end portion of the left arm portion 812a is displaced to loosen the third clutch wire 71c. Further, as shown in FIG. 5 (e), the so-called "full-line disengagement" in which the first partial thread clutch 70a, the second partial thread clutch 70b, the third partial thread clutch 70c and the fourth partial thread clutch 70d are in the "off" state. In the case of the “state”, the left rotation cam 811a is further rotated by pressing the fourth button 21d (see FIG. 3), and the base end portion of the left arm portion 813a is displaced to loosen the fourth clutch wire 71d. ..

  As shown in FIG. 6A, in the case of the “full-row insertion” state, the pair of left and right arm portions 812a, 812b, 813a, 813b are provided with the clutch wire 71 (first clutch wire 71a to fourth clutch wire 71d). Pull.

  As shown in FIG. 6B, when only the fourth partial clutch 70d is in the “off” state, the fourth button 21d (see FIG. 3) is pressed (the fourth button 21d is pressed and the fourth button 21d is pressed). When the partial clutch 70d is in the “on” state, the left rotation cam 811a rotates by pressing the fourth button 21d again, and the left arm portion 813a is displaced at the base end portion to the fourth position. Loosen only the clutch wire 71d. Further, as shown in FIG. 6C, when the fourth partial clutch 70d and the third partial clutch 70c are in the “off” state, the third button 21c (see FIG. 3) is pressed to rotate left. The cam 811a further rotates, and the base end portion of the left arm portion 812a is displaced to loosen the third clutch wire 71c in addition to the fourth clutch wire 71d.

  As shown in FIG. 6D, when the fourth partial thread clutch 70d, the third partial thread clutch 70c, and the second partial thread clutch 70b are in the “off” state, the second button 21b (see FIG. 3) is pressed. When pushed, the right rotation cam 811b rotates, and the proximal end portion of the right arm portion 812b is displaced to loosen the second clutch wire 71b. Further, as shown in FIG. 6E, in the case of the “whole strip” state, when the first button 21a (see FIG. 3) is pressed, the right rotation cam 811b further rotates, and the right arm portion 812b. Causes the base end portion to be displaced to loosen the first clutch wire 71a.

  In addition, the left operating portion 81a and the right operating portion 81b are the planting devices 41 arranged on one end side of the machine body among the four partial-row clutches 70 (first partial-row clutch 70a to fourth partial-row clutch 70d). After the partial strip clutch 70 corresponding to the above is operated in order to the partial strip clutch 70 corresponding to the planting device 41 arranged on the other end side of the airframe, the planting device 41 arranged on the other end side is dealt with. It can be operated from a clutch other than the partial thread clutch 70. For example, the left actuation part 81a and the right actuation part 81b correspond to the first planting device 41a arranged on the left end side of the machine body and the fourth partial plant clutch 70a corresponding to the fourth plant part arranged on the right end side of the machine body. After sequentially operating the fourth partial thread clutch 70d corresponding to the attachment device 41d, the first partial thread clutch 70a, the second partial thread clutch 70b and the third partial thread clutch 70a other than the fourth partial thread clutch 70d. It can be actuated from either of the partial thread clutches 70c.

  According to the embodiment described above, since the on / off mechanism 80 that operates the plurality of partial-slit clutches 70 includes the one operating portion (left operating portion) 81a and the other operating portion (right operating portion) 81b, for example, The left and right sides of the first partial clutch 70a and the second partial clutch 70b, which are the partial clutch 70 on the left side of the machine, and the third partial clutch 70c and the fourth partial clutch 70d, which are the partial clutch 70 on the right side of the machine. Can be operated individually. As a result, restrictions such as the order in which the plurality of partial-row clutches 70 are turned on and off are reduced, and the degree of freedom in operating the partial-row clutch 70 can be improved.

  Further, since the plurality of (four) partial-row clutches 70 are actuated by the two actuating parts 81 of the left actuating part 81a and the right actuating part 81b, for example, compared with the case where there is one actuating part 81, the rotating cam 811 is provided. The deviation of the amount of rotation of the clutch wire 71 and the amount of pulling of the clutch wire 71 due to the rotation of the rotation cam 811 are reduced. That is, the deviation amount of the operation of the actuating portion 81 is reduced. As a result, the operation of the partial thread clutch 70 can be stabilized.

  Further, for example, since the non-adjacent partial clutches 70 such as the first partial clutch 70a and the fourth partial clutch 70d are simultaneously actuated, the operation time can be shortened. Further, for example, the first partial thread clutch 70a is "on", the second partial thread clutch 70b is "off", the third partial thread clutch 70c is "on", and the fourth partial thread clutch 70d is "off". Further, it becomes possible to perform an operation which has not been possible up to now, such as alternately setting ON / OFF in the left-right direction, and it is possible to improve the degree of freedom in operating the partial-row clutch 70.

  Further, since the first partial thread clutch 70a at the left end and the fourth partial thread clutch 70d at the right end are simultaneously actuated, the operation time can be shortened. Further, for example, the first partial thread clutch 70a is "on", the second partial thread clutch 70b is "off", the third partial thread clutch 70c is "off", and the fourth partial thread clutch 70d is "on". If set, seedlings can be planted with a gap, so that ventilation and water flow are good and seedling growth can be stabilized. Further, as described above, it becomes possible to perform an operation which has not been possible until now, such as setting only the both end portions in the left-right direction to “ON”, and it is possible to improve the degree of freedom of operation of the partial thread clutch 70.

  Further, for example, even when the first partial thread clutch 70a at the left end portion to the fourth partial thread clutch 70d at the right end portion are sequentially operated (for example, in the "on" state), the fourth partial thread clutch 70d at the right end portion. Since it is not necessary to return (return to "OFF" state) in reverse order, it is possible to shorten the operation time and improve the degree of freedom in operation of the partial clutch 70.

  In the embodiment described above, the operation button 21 is provided with a light emitting portion such as an LED lamp or the operation button 21 itself is provided so as to emit light, and the partial thread clutch 70 (first partial thread clutch 70a to fourth partial thread). The clutch 70d) is "all-row-entry" or "all-row-off", and the operation button 21 (corresponding to the partial-row clutch 70 (first partial-row clutch 70a or fourth partial-row clutch 70d) other than the left or right end portion) When the second button 21b corresponding to the second partial thread clutch 70b or the third button 21c corresponding to the third partial thread clutch 70c) is pressed, these operation buttons 21b, 21c blink to indicate the hold state. However, it may be configured to turn on and off when pressed again. In this way, by blinking the operation button 21 to indicate the holding state, it is possible to prevent an operation confused with the partial-row clutch 70 that is normally operated from the end, and prevent an erroneous operation. can do.

  Further, for example, when the first partial thread clutch 70a is "off", the second partial thread clutch 70b is "on", the third partial thread clutch 70c is "on", and the fourth partial thread clutch 70d is "on", When the third button 21c corresponding to the third partial thread clutch 70c is pressed, it blinks to indicate the holding state, and when the third button 21c is pressed again, the third partial thread clutch 70c is set to the "off" state. You may comprise. This can prevent erroneous operation of the operation button 21 (third button 21c).

  In addition, in the above-described embodiment, the partial clutch 70 is operated at a position where the amount of power transmitted from the engine 10 (see FIG. 1), that is, the amount of power transmitted to the planting device 41 decreases. The seedling transplanter 1 (see FIG. 1) further includes a power transmission unit and a speed reduction unit. The power transmission unit transmits power to the planting device 41. The power transmission unit transmits power by a belt. The speed reduction unit is provided on the power transmission upstream side of the planting device 41, and reduces the amount of power transmission on the power transmission downstream side of the power transmission unit. The speed reduction unit is a pulley (speed reduction pulley) and reduces the rotational speed of power transmission by the belt on the power transmission downstream side of the power transmission unit.

  According to such a configuration, since the partial-strip clutch 70 is operated at the position where the transmission amount is low, the load applied to the parts related to the partial-slip clutch 70 is reduced, and the on-off operation of the partial-slip clutch 70 is stabilized.

<Handrail 142 of spare seedling stand 140>
The handrail 142 of the preliminary seedling stand 140 will be described with reference to FIGS. 7 and 8. FIG. 7 is an explanatory diagram of the handrail 142 of the preliminary seedling stand 140. 8A is an exploded perspective view of the handrail 142 of the spare seedling stand 140, and FIG. 8B is a plan view of the rotation fulcrum portion 143 of the handrail 142. As described above, the spare seedling stand 140 is provided on the left side of the machine body at the front of the machine body and is a table on which the spare seedlings are placed. Further, as shown in FIG. 7 and as described above, the preliminary seedling stand 140 is rotatably supported by the support cylinder 141.

  As shown in FIG. 7, a handrail 142 is provided on the preliminary seedling stand 140. In addition, in the example shown in FIG. 7, a plurality (two) of the spare seedling stands 140 are arranged vertically, but one spare seedling stand 140 may be provided. The handrail 142 is formed, for example, in a hook shape whose tip is bent in the width direction (left-right direction) of the mounting surface 140a of the preliminary seedling stand 140. The handrail 142 is arranged in the front part of the preliminary seedling stand 140, and is provided so as to be rotatable in the front-rear direction with the rotation fulcrum portion 143 as a fulcrum. Further, the handrail 142 is locked in an upright state and functions as a handrail, and as shown by an arrow B1 in FIG. 7 and functions as a presser foot, and as shown by an arrow B2 in FIG.

  The rotation fulcrum portion 143 is arranged above the mounting surface 140a of the preliminary seedling stand 140 and within the left and right widths of the mounting surface 140a. As shown in FIG. 8A, the rotation fulcrum portion 143 includes a cylinder 144, a biasing member 145, a lid member 146, and a pin 147. In the rotation fulcrum portion 143, in the cylinder 144, the bent base end portion 142a of the handrail 142 inserted into the cylinder 144 is urged in the axis L direction of the cylinder 144 by the urging member 145 such as a compression spring. , Accommodated in the cylinder 144. In the rotation fulcrum part 143, the bent base end part 142 a of the handrail 142 is inserted into a hole formed in the center of the disc-shaped lid member 146 and is prevented from coming off by the pin 147.

  As shown in FIGS. 8A and 8B, in the rotation fulcrum portion 143, the end surface 144a on the side where the bent base end portion 142a of the handrail 142 is inserted is formed in a slope shape. Further, a groove 144b is formed in the direction of the axis L in the most projecting portion of the end surface 144a. The handrail 142 is locked by inserting the protrusion 142b protruding from the bent base end 142a of the handrail 142 into the groove 144b, and inserting the protrusion 142b into the groove 144b.

  In this way, by providing the handrail 142 on the preliminary seedling stand 140, the operator can get on and off safely. At this time, the handrail 142 is locked by the rotation fulcrum portion 143. Further, the handrail 142 serves as a retainer for an empty box or the like on which the seedlings are removed, which is placed on the placing surface 140a. In this case, the bent base end portion 142a of the handrail 142 is biased by the biasing member 145 in the cylinder 144, so that the handrail 142 is biased in a direction to press the empty box. When the handrail 142 is not in use, the handrail 142 is rotated forward to be in a stored state. Also in this case, the handrail 142 is urged by the urging member 145 so as to be in the storage posture.

  FIG. 9 is an explanatory diagram of a modified example (handrail 142A) of the handrail of the spare seedling stand 140. As shown in FIG. 9, the handrail 142A is formed in an annular shape and is attached to, for example, the inner frame 148 of the preliminary seedling stand 140, and is used as a handrail when the operator is on board. This allows the operator to get on and off safely. Note that such a handrail 142A can be suitably provided in, for example, a seedling transplanter having a large area in the front part of the machine body.

<Handrail 131 of seedling rail 130>
Further, the handrail 131 of the seedling rail 130 will be described with reference to FIG. 10. FIG. 10 is an explanatory diagram of the handrail 131 of the seedling rail 130. As described above, the seedling rail 130 is a rail that is provided on the right side of the machine body in the front part of the machine body and sends the mat seedlings toward the rear seedling planting section 40 (see FIGS. 1 and 2).

  As shown in FIG. 10, the seedling rail 130 is provided with a handrail 131 attached to the inner frame 132 of the seedling rail 130. The handrail 131 has a rectangular loop shape, and is provided in front of and behind the seedling rail 130. Further, the handrail 131 extends forward from the rail surface 130a of the seedling rail 130. Until now, the seedling rail 130 was provided with grips used by operators (pilots) and work assistants to pull the seedling rail around the front and rear portions of the seedling rail 130. With the provision, the operator and the work assistant can use it as a grip of the seedling rail 130 and also as a handrail when getting on and off. Note that the handrail 131 may be provided so as to be changeable in shape, for example, in a handrail state or a collapsed state in which the handrail 131 is collapsed in the vertical direction by being formed in a parallel link shape. In the handrail state, the movable part is locked.

<Vehicle roof 90>
The vehicle body roof 90 will be described with reference to FIG. 11. FIG. 11 is an explanatory diagram of the vehicle body roof 90. As shown in FIG. 11, a vehicle body roof 90 may be provided above the control seat 28 and the control portion 30. The vehicle body roof 90 has a roof portion 91 and a winding portion 92. The roof portion 91 is formed of, for example, a cloth having a water-repellent function such as GORE-TEX (registered trademark), and has a hook 911 at the leading edge which is one edge. Further, the roof portion 91 is attached to the winding portion 92 on the base end edge side which is the other end edge.

  The winding portion 92 stores the roof portion 91 while urging the roof portion 91 in the winding direction. That is, in the vehicle body roof 90, the roof portion 91 housed in the winding portion 92 is pulled forward by the external force, which is the tip edge side, and when the external force is removed, the winding portion 92 winds the roof portion 91, and It will be pulled back toward the edge side. Further, in order to mount the vehicle body roof 90, the traveling vehicle body 2 is provided with a front frame 93 and a rear frame 94.

  The front frame 93 has a front beam portion 931 that extends upward from the left and right side portions of the front portion of the traveling vehicle body 2 and extends in the left and right direction at the upper portion, and is formed in a U shape as a whole. The roof portion 91 described above is held in a pulled-out state by hooking the hook 911 to the front beam portion 931. Further, the front frame 93 functions as, for example, a handrail grasped by the operator when getting on and off from the front of the machine body, and also functions as a mounting portion to which the drink holder 95 and the accessory case are attached.

  The rear frame 94 has a rear beam portion 941 that extends upward from the left and right side portions in the rear portion of the traveling vehicle body 2 and extends in the left and right direction at the upper portion, and is formed in a U shape as a whole. The winding section 92 described above is attached to the rear beam section 941. The rear frame 94 also functions as, for example, a handrail grasped by the operator when getting on and off the vehicle from the side of the aircraft.

  According to such a configuration, since the vehicle body roof 90 has a water-repellent function, it also serves as an awning in fine weather and a rain shelter in rainy weather. It becomes a roof. The front frame 93 and the rear frame 94 can be made lighter by using, for example, aluminum or a carbon material. Further, the vehicle body roof 90 can be used not only for the seedling transplanting machine 1 but also for work vehicles such as small tractors and passenger management machines.

<Aze clutch sprocket 100>
The aze clutch sprocket 100 will be described with reference to FIG. FIG. 12 is an explanatory view of the aze clutch sprocket 100, and is a schematic perspective view of the aze clutch sprocket 100. As shown in FIG. 12, a sprocket (aze clutch sprocket) 100, which is a member for transmitting power in the partial thread clutch 70 (see FIG. 3), has a cam groove (first cam groove) 101 having a deeper cam groove (first cam groove). This is a two-stage cam structure in which a second cam groove) 102 is formed. The second cam groove 102 is formed in a range of 50 ° from the terminal end portion of the first cam groove toward the front.

  According to this structure, because of the two-stage cam structure, even if the aze clutch sprocket rotates in the reverse direction, the pin (partial thread clutch 70) enters the second cam groove to prevent the reverse rotation. Thus, for example, even in the case of high-speed work in which the seedling planting section 40 is driven at high speed, the power is cut off even if the planting claws 42 (see FIGS. 1 and 2) are reversed due to inertia, It is possible to reduce abnormal noise and crispness, as well as to perform high-speed cutting.

  Further effects and modifications can be easily derived by those skilled in the art. As such, the broader aspects of the present invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept defined by the appended claims and their equivalents.

1 work vehicle (seedling transplanter)
2 Running vehicle 4 Front wheel 5 Rear wheel 7 Main frame 10 Engine 11 Engine cover 15 Power transmission mechanism 16 Hydraulic type continuously variable transmission 17 Belt type power transmission mechanism 18 Mission case 20 On / off operation part 21 Push button switch (operation button)
26 Floor Step 27 Rear Step 28 Pilot Seat 30 Control Section 31 Front Cover 32 Handle 33 Upper Panel 35 Shift Lever 36 Elevating Lever with Plant 40 Seedling Planting Section 41 Planting Claw 43 Seedling Feeding Belt 45 Loading Section 46 Planting Transmission case 47 Rotary case 50 Elevating mechanism for seedling planting section 51 Elevating link 53 Upper link 54 Lower link 55 Link base frame 56 Elevating cylinder 61 Center float 62 Side float 70 Partial clutch 71 Clutch wire 72 Wire 73 Wire 80 On / off mechanism 81 Working part 81a One working part (left working part)
81b The other operating part (right operating part)
811 Rotation cam 811a Left rotation cam 811b Right rotation cam 812 Arm part 812a Left arm part 812b Right arm part 813 Arm part 813a Left arm part 813b Right arm part 814 Support point 815 Cam groove 816 Rotation support point 817 Sliding pin 82 Base portion 821 Mounting surface 90 Body roof 91 Roof portion 911 Hook 92 Winding portion 93 Front frame 931 Front beam portion 94 Rear frame 941 Rear beam portion 95 Drink holder 100 Aze clutch sprocket 101 First cam groove 102 Second cam groove 130 seedling rail 130a rail surface 131 handrail 132 inner frame 140 preliminary seedling stand 140a mounting surface 141 support tube 142 handrail 142a bent base end 142b convex portion 143 rotation fulcrum portion 144 cylinder 144a end surface 144b groove 145 Biasing member (compression spring)
146 Lid member 147 Pin 148 Inner frame 150 Fertilizer application 151 Fertilizer hopper 152 Fertilizer feeding part 153 Blower 154 Fertilizer hose

Claims (6)

A loading section for loading seedlings at the rear of the aircraft,
A planting device that is lined up in the left-right direction at the rear part of the machine body and planted the seedlings loaded in the loading part in a field,
A plurality of partial thread clutches corresponding to the planting device,
An on-off mechanism for operating the plurality of partial-thread clutches,
The on / off mechanism includes one actuating portion for actuating the partial-slit clutch corresponding to the planting device arranged on the left side of the machine body, and one partial-slit clutch corresponding to the planting device arranged on the right part of the machine body. A working vehicle, comprising: the other actuating portion that is actuated. There are at least three partial-row clutches,
The work vehicle according to claim 1, wherein the one actuating portion and the other actuating portion simultaneously actuate partial strip clutches of the partial strip clutches that are not adjacent to each other.   The one actuating portion and the other actuating portion are, in the partial thread clutch, a partial thread clutch corresponding to a planting apparatus arranged at the left end of the machine body and a planting apparatus arranged at the right end of the machine body. The work vehicle according to claim 2, wherein the corresponding partial-thread clutches are simultaneously actuated.   The one actuating portion and the other actuating portion of the partial clutch are the plant clutches arranged on the other end side of the fuselage from the partial clutch corresponding to the planting device arranged on the one end side of the fuselage. The partial strip clutch corresponding to the attachment device is sequentially operated, and then the partial strip clutch other than the partial strip clutch corresponding to the planting device arranged on the other end side is operated. The work vehicle according to any one of 3 above. A power transmission unit that transmits power to the planting device,
Further comprising a speed reducer provided on the power transmission upstream side of the planting device and reducing the amount of power transmission on the power transmission downstream side of the power transmission portion,
The said one actuation part and the said other actuation part act | operate the said partial thread clutch in the state in which the amount of transmission was reduced by the said speed reduction part, The any one of Claims 1-4 characterized by the above-mentioned. Work vehicle. A seedling feeding belt, which is provided in the stacking unit and sends seedlings toward the planting device,
And a fertilizer application device for applying fertilizer to the seedlings planted by the planting device,
The partial strip clutch, the seedling feeding belt and the fertilizer application are operated to turn on and off the power transmission by being pulled by the wires connected to each.
Of the wires, the partial-slit clutch is in a state where power transmission is turned on by pulling a wire connected to the partial-slip clutch,
The seedling feeding belt and the fertilizer application are in a state in which power transmission is turned on by loosening the wires respectively connected to the seedling feeding belt and the fertilizer application among the wires. The work vehicle according to any one of 5 above.