JP3880446B2 - Rice transplanter with fertilizer application - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  In the present invention, a seedling planting device having a plurality of seedling planting mechanisms arranged in the lateral direction of the airframe is connected to the rear portion of the self-propelled vehicle body so as to be movable up and down. It is related with the rice transplanter with a fertilizer which is equipped with the fertilizer which supplies fertilizer separately in the neighborhood.
[0002]
[Prior art]
  In the above rice transplanter, conventionally, there are provided a few-row planting clutch that cuts off the transmission to a part of a plurality of seedling planting mechanisms and a minority-row fertilization clutch that cuts off a fertilizer corresponding to a part of the plurality of seedling planting mechanisms.I gotThere was a thing.
[0003]
[0004]
[0005]
[0006]
[Problems to be solved by the invention]
  The seedlings that are provided with the few-row planting clutch and the minority-row fertilization clutch and have been conventionally provided with one clutch operating tool that is linked to both clutches, while stopping seedling planting by some seedling planting mechanisms. When switching between planting operations, so-called fractional planting operations, and all-multiple planting operations, there are some which can switch both clutches by operating only one clutch operating tool.
[0007]
  In this type of rice transplanter, when performing all-row planting work without fertilization, a small number of fertilizer clutches have been used to prevent fertilization.KuWhen switching to the cutting side with the latch operation tool, the small number of planting clutches are also switched to the cutting side, and the seedling planting mechanism is not driven, so the fertilizer feeding is performed by switching the shutter provided on the fertilizer feeding device to the closing side. Planting work has been performed by preventing fertilizer from being supplied to the feeding operation section of the apparatus. For this reason, it was necessary to operate the shutters provided in each of the plurality of fertilizer feeding devices, which was troublesome.
[0008]
  In addition, in this type of rice transplanter, problems may occur when switching operations or replenishing seedlings depending on how the clutch operating tools are arranged.
  That is, if the clutch operating tool is located closer to the seedling planting device than the fertilizer supply device unit, it becomes difficult to operate from the operation unit, and in order to switch between the fraction planting work and the whole planting work, To operate the operation tool,It is necessary to get off the driving part, and it takes time. Even if the clutch operating tool is closer to the driving unit than the fertilizer supply device unit, when the seedling planting device is replenished from the driving unit, if the clutch operating tool protrudes, it may become an obstacle or touch the body. The situation such as moving is likely to occur.
[0009]
[0010]
[0011]
[0012]
[0013]
  The object of the present invention is to change the work mode easily.e,Switching of small number of fertilizer clutchAndSeedling supply, etc.ButEasy to doGivingThe purpose is to provide a rice transplanter with a fertilizer.
[0014]
[Means for Solving the Problems]
  The configuration, operation, and effect of the invention according to claim 1 are as follows.
[0015]
  [Constitution]
  A seedling planting device with a plurality of seedling planting mechanisms arranged in the lateral direction of the aircraft is connected to the rear part of the self-propelled vehicle body so as to be movable up and down, and separately around the seedling planting location by the plurality of seedling planting mechanisms. In a rice transplanter with a fertilizer supply device equipped with a fertilizer supply device,
  A small number of row fertilizers that are provided with a plurality of small number of planting clutches that allow transmission and reception of transmission to a part of the plurality of seedling planting mechanisms, and that can be operated independently, and that apply fertilizers corresponding to a part of the plurality of seedling planting mechanisms. A plurality of clutches can be separately entered and operated freely, and one clutch operating tool that performs switching operation in conjunction with the minority planting clutch and the minority fertilization clutch that have the same seedling planting mechanism to be controlled, In correspondence with each of the plurality of minority planting clutches and minority fertilization clutches,
  One clutch collective operation tool for switching the plurality of minority fertilization clutches to the cut side while maintaining the plurality of minority planting clutches on the entry side in preference to the plurality of clutch operation tools is provided.
[0016]
  [Action]
  If an appropriate one is selected and operated from a plurality of clutch operating tools, the small number of planting clutches and the small number of fertilizer application clutches are switched to the entry side or the cut side, and a desired part of the seedling planting mechanism is Driven seedlingofAs planting is performed, fertilization of the planted seedling is performed, or a desired part of the seedling planting mechanism is stopped, so that seedling planting is stopped and fertilization for the planting strip is also stopped.
[0017]
  If you operate the clutch collective operation tool, you can keep multiple minority planting clutches on the entry side.DoubleA small number of small fertilizer clutches can be switched to the cutting side in preference to the clutch operating tool, and the plurality of seedling planting mechanisms can be driven to perform seedling planting while stopping the fertilization of planted seedlings by each seedling planting mechanism .
[0018]
  [effect]
  Therefore, it is easy to operate just by operating the predetermined clutch operating tool. can do. On the other hand, it is possible to perform all-row planting work without applying fertilization by turning a plurality of minority fertilization clutches on the cut-off side while easily operating a plurality of minority planting clutches by simply operating the clutch collective operation tool.
[0019]
  The structure, operation, and effect of the invention according to claim 2 are as follows.
[0020]
  [Constitution]
  In the invention according to claim 1, the clutch operating tool is provided so as to be swingable between a fertilizer supply device portion of the fertilizer application and a driver seat located on the front side of the fertilizer supply device portion, and the latch operating tool is entirely disposed at the clutch engagement position. It will be in the attachment state retreated over the vehicle body back side from the front end part of the fertilizer supply apparatus part.
[0021]
  [Action]
  Clutch operating toolSince it is provided so as to be swingable between the fertilizer supply unit and the driver seat located on the front side of the fertilizer supply unit,Clutch operating toolThis can be manipulatedClutch operating toolIf you operate a part of the seedling planting mechanism,ofAs planting is performed, fertilization is performed on the planted seedlings, or some seedling planting mechanisms are stopped, so that seedling planting is stopped and fertilization for the planting strips is also stopped.
[0022]
  Generally when workingClutch operating toolIs operated to the clutch engaged position, and in this clutch engaged position,Clutch operating toolIs retired from the front end of the fertilizer supply device part to the rear side of the vehicle body, so when replenishing the seedling planting device from the driving part,Clutch operating toolIs covered by the fertilizer supply device, so that it is difficult to become an obstacle or to touch the body.
[0023]
  [effect]
  Therefore,Clutch operating toolEasy operation by switching the small number of planting clutches and the small number of fertilizer clutches,Clutch operating toolCan be operated from the driving section, and can be switched easily and quickly between a small number of planting operations and a whole number of planting operations.
  Moreover, in performing operations on the seedling planting device such as seedling replenishment from the driving department,Clutch operating toolIs easy to do because it is difficult to become an obstacle or touch the body.
[0024]
[0025]
[0026]
[0027]
[0028]
[0029]
[0030]
[0031]
[0032]
[0033]
[0034]
[0035]
[0036]
DETAILED DESCRIPTION OF THE INVENTION
  As shown in FIGS. 1 and 2, a pair of left and right front wheels 1 and a pair of left and right rear wheels 2 are driven by a driving force from an engine 11 to self-run, and the engine 11 is In the rear part of the self-propelled vehicle body provided with the spare seedling storage device 3 located on both sides of the provided driving part 10 and the riding type driving part provided with the driving seat 4 located at the rear part of the vehicle body, The seedling planting device 20 is connected via the link mechanism 6, and the link mechanism 6 is swung up and down with respect to the vehicle body by a lift cylinder 7 connected to the link mechanism 6 on the rod side. 20 is configured to move up and down, and the driving force from the engine 11 is configured to be transmitted to the seedling planting device 20 by the rotary shaft 8, which is long in the lateral direction of the vehicle body located behind the driver seat 4. One fertilizer tank 31 Let me provided with a by and fertilizer apparatus S with, have configured fertilizing device with riding rice transplanter.
[0037]
  In this rice transplanter, the seedling planting device 20 is arranged in the lateral direction of the planting machine body by running the self-propelled vehicle body in a descending work state in which the seedling planting device 20 is grounded by the ground float 21 on the rice field. A plurality of seedlings are planted by the seedling planting mechanism 22, and at the same time, the fertilizer application device S supplies granular fertilizers near the lateral sides of each of the plurality of planted seedlings. It is configured as follows.
[0038]
  As shown in FIGS. 1, 2, 3, etc., the seedling planting apparatus 20 includes a planting machine body including a feed case 23 that is input from the rotary shaft 8, and a plurality of planting cases 24 that are arranged in the lateral direction of the planting machine body. A frame, the seedling planting mechanism 22 attached to both lateral sides of the rear end portion of each planting case 24 so as to be freely rotatable, and a lateral direction of the planting machine body above the front end side of the planting machine body frame A seedling platform 25 that is provided slidably and is reciprocated in the left-right direction in conjunction with the seedling planting movement of each seedling planting mechanism 22 to supply seedlings to each seedling planting mechanism 22, and the planting machine frame A plurality of grounding floats 21 are provided in the lower part so as to be arranged in the lateral direction of the planting machine body so as to swing up and down around the axis on the rear end side.
[0039]
  As shown in FIG. 1, FIG. 3, FIG.The manureThe fertilizer supply device section 30 provided with the fertilizer tank 31 and a plurality of fertilizer discharge ports 41 arranged in the vehicle body lateral direction of the fertilizer supply device section 30 are individually extended toward the seedling planting device 20 and extended. A plurality of fertilizer supply paths 50 whose output ends are located on the back side of the seedling mount 25 and the extension ends of the plurality of fertilizer supply paths 50 are separately connected to the seedlings. A plurality of grooving and fertilizers 70 arranged in the lateral direction of the planting machine in an arrangement located one by one near the lateral side of the mechanism 22 and fixed to the grounding float 21, and a blower 61 located below the driver's seat 4. It is comprised by the air blower part 60 provided with.
[0040]
  As shown in FIGS. 4 and 5, the fertilizer supply unit 30 has a lid 32 that is swingably opened and closed at the top, and the lid 32 is also a tank so that the inside can be seen from the outside without opening the lid 32. The main body of the fertilizer tank 31 is connected to each of the fertilizer tank 31 made of a transparent resin material and a plurality of lower bottom portions 31a arranged in the vehicle body lateral direction of the fertilizer tank 31. A plurality of fertilizer feeding devices 40 are connected to the lower portion side by side in the vehicle body lateral direction.
[0041]
  As shown in FIGS. 6 to 9 and the like, each fertilizer feeding device 40 is made of a transparent resin material so that the upper end side is connected to the lower thinned bottom portion 31a of the fertilizer tank 31 and the inside can be seen from the outside. A feeding case 42, a feeding roll 43 rotatably provided in one of a pair of left and right feeding chambers located inside the feeding case 42, and a communication between the pair of feeding chambers at the lower end side of the feeding case 42. One of the two fertilizer discharge ports 41 provided side by side in the lateral direction of the vehicle body and a supply port provided to supply fertilizer to the feed roll 43 inside the feed case 42. 2 shutters 45 for 44 and the like.
[0042]
  That is, each fertilizer feeding device 40 is provided with an operation knob at the end protruding from the feeding case 42 of the feeding amount adjusting tool 46 formed of a sliding rod connected to one end of each shutter 45. The operation amount 46a provided is slidably operated along the guide groove 118a of the operation guide 118 as shown in FIG. 9 by sliding the supply amount adjusting tool 46, so that at least one of the two shutters 45 is attached to the supply case 42. The supply port 44 is opened by pushing into the shutter accommodating chamber 45a located inside, and the rotation support shaft 47 that is also used as the rotation support shaft of the supply roll 43 located in the other supply chamber is driven. Thus, the fertilizer is fed from the fertilizer tank 31 to the fertilizer discharge port 41 by the feeding roll 43. That is, the feeding roll 43 is driven by the rotation support shaft 47 so as to rotate in the feeding direction around the horizontal axis, and flows down from the discharge port 31 b of the fertilizer tank 31 into the feeding case 42 and from the supply port 44. The fertilizer supplied to the upper side of the feeding roll 43 is taken out to the lower side of the feeding roll 43 by a plurality of feeding recesses 43a as shown in FIGS. The fertilizer discharge port 41 is allowed to flow down from the outlet.
[0043]
  ManureIn the two fertilizer feeding devices 40 connected to one lower bottom 31a of the fertilizer tank 31, the feeding case 42 of one fertilizer feeding device 40 and the feeding case 42 of the other fertilizer feeding device 40 Are manufactured as a single part, and a feed roll 43 of both fertilizer feeding devices 40 is supported by a single rotation support shaft 47 so as to be freely rotatable. And in one feeding device 40 of the two fertilizer feeding devices 40 connected to one lower narrow bottom portion 31a located inside the vehicle body of the fertilizer tank 31, the supply port 44 is covered by a lid. Closed and not in use.
[0044]
  As shown in FIGS. 10 to 12, the blower unit 60 includes a blower 62 provided with a blower 62 and an electric motor 63 that drives the blower 62, and a front side of a lower end portion of each feeding device 40. The connected air duct 65 and the air intake duct 68 that extends from the air inlet 62a of the blower 62 of the blower 61 to the front side of the vehicle body and that is open to the driving portion 10 on the extended end side are configured. .
[0045]
  As shown in FIG. 12, the opening 68 a located in the prime mover 10 of the intake duct 68 has a rear end side of a tubular muffler cover 13 that is mounted so as to be externally fitted to the engine exhaust muffler 12. On the other hand, the muffler cover 13 is connected via a bellows-shaped rubber cylinder 14 that suppresses the vibration of the muffler cover 13 from being transmitted to the intake duct 68.
[0046]
  As shown in FIGS. 6, 10, 13, 15, etc., the air duct 65 is connected to the fertilizer discharge port 41 on the front side of the lower end portion of the feeding case 42 of each of the plurality of fertilizer feeding devices 40. A horizontal pipe-shaped distribution duct portion 66 connected to a wind intake port 48 provided so as to communicate in a straight line in the longitudinal direction of the vehicle body, and a side wall of the distribution duct portion 66 of the distribution duct portion 66. The central portion 66a is integrally formed with the central portion 66a so as to extend from the portion 66a located in the central portion in the direction toward the lower side of the vehicle body and slightly forward and to be a single part with the central portion 66a. An introduction duct portion 67 is included. As shown in FIG. 13 and the like, the introduction duct portion 67 of the air duct 65 penetrates the vehicle body cover 71 covering the upper portion of the rear portion of the vehicle body frame at the center portion in the vehicle body left-right direction behind the driver seat 4. The introduction port 67 a of the introduction duct portion 67 is connected to the outlet 62 b of the blower 62 by a joint 69 below the vehicle body cover 71.
[0047]
  In other words, the air blower unit 60 is heated by the engine exhaust muffler 12 inside the muffler cover 13 and sucks the air whose temperature has risen through the intake duct 68 by the blower 62 driven by the electric motor 63 and has a high temperature. Fertilizer conveying wind is generated, and the fertilizer conveying wind is sent from the outlet 62b to the distribution duct portion 66 through the introduction duct portion 67 of the blower duct 65, and is distributed to the plurality of fertilizer feeding devices 40 by the distribution duct portion 66. The fertilizer supply device 40 supplies the fertilizer discharge port 41 from the wind intake port 48.
[0048]
  The feed roll 43 of each fertilizer feed device 40 includes a feed drive shaft 81 formed of a single hexagonal shaft that is horizontally mounted on the rear surface side of the feed case 42 of each fertilizer feed device 40 so as to be rotatable as shown in FIG. The fertilizer application driving device 80 is configured to be driven, and the fertilization driving device 80 is configured as shown in FIG. 4, FIG. 5, FIG.
[0049]
  That is, the fertilizer application drive device 80 is provided between the feeding drive shaft 81 and each of the plurality of rotating support shafts 47 that support the feeding drive shaft 81 and the feeding rolls 43 so as to be integrally rotatable two by two. The provided small number of fertilizer clutch 90, and first and second one-way rotary clutches 82, 83 in which the output side rotating bodies 82a, 83a are connected to the feeding drive shaft 81 as shown in FIGS. A link mechanism 84 that interlocks the input-side rotators 82b and 83b of both one-rotation direction clutches 82 and 83, and an operation that is integrally extended from the input-side rotator 82b of the first one-rotation direction clutch 82. One end side of the arm 85, a fertilization amount adjusting mechanism 95 in which an arm side interlocking member 96 is connected to the operation arm 85, and a driving side interlocking member 97 of the fertilization amount adjusting mechanism 95 are relatively rotated. A drive rod 86 of a round bar which is connected to the stationary crank arm 87a on the other end of the drive rod 86 are constituted by a power take off mechanism 87 which connects relatively rotatably.
[0050]
  As shown in FIGS. 7 and 16, each of the minority fertilizing clutches 90 meshes with a gear portion 47a that is rotatably provided integrally with an end portion of the rotating support shaft 47 that protrudes from the fertilizer feeding case 42 to the outside. In this state, the output gear 91 is rotatably supported by the feed drive shaft 81, and is slidably supported by the feed drive shaft 81. The input side member 92 that rotates integrally with the shaft 81, the meshing clutch body 90a provided between the input side member 92 and the output side member 91, and the input side member 92 are slidably biased. When the operating portion 94 that is provided with the clutch spring 93 and is engaged with the operating groove of the input side member 92 by the operating pin 94a is swung, an artificial operating force transmitted to the operating portion 94 is obtained. Due to the operating force of the latch spring 93, the input side member 92 slides relative to the feed drive shaft 81, and the clutch pawl of the input side member 92 of the clutch body 90a is engaged with and disengaged from the clutch pawl of the output gear 91. Thus, the rotational force of the feed drive shaft 81 is transmitted to the gear portion 47a of the rotary support shaft 47 via the input side member 92, the clutch main body 90a, and the output side member 91, and the feed roll 43 of the two fertilizer feed devices 40 is transferred. It enters a state of being driven together, or is cut off so that the driving of the two fertilizer feeding devices 40 feeding rolls 43 is stopped at once by cutting off the transmission from the feeding driving shaft 81 to the rotating support shaft 47. Or
[0051]
  As shown in FIGS. 17 and 19, the link mechanism 84 includes a rod-shaped interlocking link 84 a having one end connected to the input-side rotating body 82 b of the first one-rotation direction clutch 82, and the interlocking link 84 a The other end portion of the swing link 84b is connected to one arm portion and supported by the support member 88 so as to be swingable. The other arm portion of the swing link 84b is connected to the second one-rotation direction clutch 83. It is composed of an interlocking link 84c made of a rod that is interlocked with the input side rotating body 83b, and drives the feeding roll 43 of each fertilizer feeding device 40 by reciprocating rocking around the axis of the feeding driving shaft 81 of the operation arm 85. Is possible.
  In other words, when the operating arm 85 is swung to the ascending side (arrow A side in FIG. 17), the rotational force of the operating arm 85 is transmitted to the feeding drive shaft 81 by the first one-way rotary clutch 82. At this time, the interlocking link 84a swings the swinging link 84b for turning the input side rotating body 82b of the first one-way rotation clutch 82, and the swinging link 84b is connected to the second via the interlocking link 84c. The input-side rotating body 83b of the one-way rotation clutch 83 is rotated. The input-side rotating body 83b is rotated in the rotation direction opposite to the feeding direction and is idled with respect to the output-side rotating body 83a. When the operating arm 85 is swung to the lowering side (arrow B side in FIG. 17), the input-side rotating body 82b of the first one-way rotation clutch 82 is idle with respect to the output-side rotating body 82a. At this time, the interlocking link 84a swings the swinging link 84b for turning the input side rotating body 82b of the first one-way rotation clutch 82, and the swinging link 84b is connected to the second via the interlocking link 84c. The input side rotating body 83 b of the one-way rotation clutch 83 is rotated in the feeding direction, and the link mechanism 84 drives the feeding drive shaft 81 via the second one-way rotation clutch 83.
[0052]
  As shown in FIG. 4 and the like, the power take-off mechanism 87 takes out this drive force from the middle of the rotating shaft 73 that transmits the drive force from the engine 11 to the rear wheel drive case 72 in FIG. The drive rod 86 is driven to rotate, and the drive rod 86 is reciprocated by the rotating crank arm 87a.
[0053]
  As a result, the fertilizer application drive device 80 drives the crank arm 87a by the driving force of the rotary shaft 73 that transmits power to the left and right rear wheels 2, and reciprocates the drive rod 86 by the crank arm 87a. The power is transmitted to the operation arm 85 via the fertilizer application amount adjusting mechanism 95, and the operation arm 85 is reciprocally swung around the axis of the feeding drive shaft 81. The operation arm 85 causes a pair of one-way rotation clutches 82, 83 to move. The feed drive shaft 81 is driven to rotate through the link mechanism 84 and the driving force of the feed drive shaft 81 is transmitted to the rotation support shaft 47 of the feed roll 43 of each fertilizer feed device 40 through the small number of fertilizer clutch 90. By doing so, the feeding roll 43 of each fertilizer feeding device 40 is driven to rotate only in a predetermined feeding rotation direction.
[0054]
  That is, the fertilizer application device S performs fertilization as follows.
  That is, the feeding roll 43 of each fertilizer feeding device 40 of the fertilizer supply device section 30 is driven by the fertilizer driving device 80 using the driving force of the rotating shaft 73 that transmits power to the left and right rear wheels 2 as a power source. 43, the granular fertilizer is fed from the fertilizer tank 31 to the fertilizer discharge port 41 in a set amount determined by the volume of the recess 43a and the number of shutters 45 that have been opened, and this fertilizer is fed to the blower 60 61 and the air duct 65 are supplied to the groove fertilizer 70 through the fertilizer supply path 50 by the fertilizer conveying wind supplied to the fertilizer discharge port 41, and the side of the planted seedling by the seedling planting mechanism 22 by each groove fertilizer 70. A groove is formed on the rice field near the side, and the fertilizer is dropped inside the groove.
[0055]
  In each fertilizer feeding device 40, the two shutters 45 are adjusted to be opened and closed by the feed amount adjusting tool 46, thereby turning on and off the fertilizer feed and adjusting the feed amount of the fertilizer.
  That is, when both of the two shutters 45 are operated to the closing side, the supply port 44 is fully closed, and no fertilizer is supplied to the feeding roll 43, so that the feeding of the fertilizer is cut. When both of the two shutters 45 are operated to the opening side, the supply port 44 is fully opened, and the feeding recess 43a on one half of one side of the feeding roll 43 and the feeding recess 43a on the other half of the other side are placed. However, fertilizer will be supplied, and the amount of feed per unit time will increase as fertilizer is fed. On the other hand, when one of the two shutters 45 is operated on the open side and the other is operated on the closed side, the supply port 44 is in a half-open state, and only in the feeding recess 43a in one half of one of the feeding rolls 45. Fertilizer will be supplied, the feed of fertilizer will be entered, and the feed amount per unit time will be reduced.
[0056]
  As shown in FIG. 18, the fertilization amount adjusting mechanism 95 is configured to clamp and connect the arm side interlocking member 96 made of a sheet metal member and one end side of the arm side interlocking member 96 to the back plate portion 85 a of the operation arm 85. The drive side interlocking member 97, which is composed of a connection screw 98, a sheet metal member having a U-shaped cross section and the end of the drive rod 86 is connected by a connection pin 97a, and the back plate of the drive side interlocking member 97 The portion 97b is provided with an adjusting screw 99 that is connected to the back plate portion 96a of the arm side interlocking member 96.
[0057]
  The arm-side interlocking member 96 has a plurality of positioning recesses 85b in which positioning pins 96b fixed over the pair of horizontal plate portions are arranged in the longitudinal plate portion of the operation arm 85 in the longitudinal direction of the operation arm 85. It is configured to be connected to the back plate portion 85a of the operation arm 85 by the connection screw 98 at a connection position that is inserted into one selected from the above.
  In other words, when the tightening of the arm side interlocking member 96 with respect to the operation arm 85 by the connection screw 98 is released, the screw hole 85c for the connection screw 98 of the operation arm 85 is a long hole, so that the arm side interlocking member 96 is connected to the connection screw. 98 and the operating arm 85 can be slid and adjusted, and the positioning recess 85b of the operating arm 85 into which the positioning pin 96b enters is changed to change the connecting position of the arm side interlocking member 96 to the operating arm 85. In the longitudinal direction of the arm 85, the position is changed at a position change pitch determined by the pitch at which the positioning recesses 85b are arranged.
[0058]
  The positioning pin 96b of the drive side interlocking member 97 is adjusted by rotating and adjusting an adjustment member 99a made of a nut attached to the other end of the adjustment screw 99 that is fixed to the drive side interlocking member 97 at one end side. Each of the inserted pin hole 97c and the pin hole 96c into which the end of the connecting pin 97a of the arm side interlocking member 96 is a long hole makes the arm side interlocking member 96 of the driving side interlocking member 97. The position change is a position change pitch determined by the screw pitch of the adjustment screw 99 in the direction along the longitudinal direction of the operation arm 85 and a position change smaller than the position change pitch of the arm side interlocking member 96 with respect to the operation arm 85. It is configured to change with the pitch.
[0059]
  Thereby, the fertilizer application amount adjusting mechanism 95 transmits the reciprocating power of the driving rod 86 to the operating arm 85 via the driving side interlocking member 97 and the arm side interlocking member 96, thereby driving the operating arm 85 by the driving rod 97. It is possible. Then, by changing the connection position of the arm side interlocking member 96 with respect to the operation arm 85, the connection position of the driving rod 86 in the operation arm 85 is changed at a relatively large change pitch in the longitudinal direction of the operation arm 85. Roughly changes the swing angle driven by the drive rod 86, and roughly adjusts the fertilizer feed amount per unit time in each fertilizer feed device 40. Then, by changing the connection position of the drive side interlocking member 97 with respect to the arm side interlocking member 96, the connection position of the drive rod 86 in the operation arm 85 is changed in the longitudinal direction of the operation arm 86 with a relatively small change pitch. The swing angle at which the arm 85 is driven by the drive rod 86 is finely changed, and the fertilizer feed amount per unit time in each fertilizer feed device 40 is finely adjusted.
[0060]
  Each of the plurality of fertilizer supply paths 50 respectively connected to the plurality of fertilizer discharge ports 41 of the fertilizer supply device section 30 is made as a separate part from the feeding case 42 of the fertilizer feeding device 40 as shown in FIG. An inflexible resin pipe member 51 whose proximal end is connected to the fertilizer discharge port 41 of the fertilizer feeding device 40 by a joint 51a, and one end of the pipe member 51 is connected to the distal end side of the pipe member 51 by a joint 51a. A flexible hose 52, an air vent mechanism 55 in which the inlet of the fertilizer supply pipe 56 is connected to the other end of the hose 52 as shown in FIG. 3, and the fertilizer supply pipe of the air vent mechanism 55 as shown in FIG. The 56 outlets are constituted by a non-flexible resin pipe member 53 connected to the groove-growing fertilizer 70.
[0061]
  The fertilizer supply unit 30 is supported by the vehicle body main frame 5 facing the vehicle body, which is formed of a pair of left and right square pipe members of the self-propelled vehicle body, by the mounting structure shown in FIGS. 4, 5, 21, and the like.
[0062]
  leftThe vehicle body frame 75 is connected to the upper part of one rear end side of a pair of left and right sheet metal vehicle body frames 75 erected separately at the rear part of the right pair of vehicle body main frames 5 via a connecting member 101a. The lower end side is connected to the upper part of the rear end side of one of the vehicle feed posts 101 and the other sheet metal body frame 75 which is erected at the rear part via the connecting member 101a, and the rear part of the other body frame 75 A feed post 101 that is erected on the left side, a rear frame portion 103 that is laterally directed to the vehicle body across the upper ends of both feed posts 101, and is supported by both feed posts 101; A support portion of the vehicle body frame 76 made of a round pipe material that faces the vehicle body and is connected across intermediate portions in the vehicle body longitudinal direction on the upper end side of the sheet metal vehicle body frame 75. A tank column 107 made up of a pair of left and right round pipe members erected on 6a and a round pipe member that is connected across the upper ends of both tank columns 107 and is supported by both tank columns 107. The tank support 108 is provided on the rear side of the driver's seat 4 of the self-propelled vehicle body, and the rear frame portion 103 of the feeding support frame 102 is connected to the rear surface side of the feeding case 42 of each feeding device 40. A front frame portion 104 made of a horizontal bar facing the vehicle body, which is connected by a bolt 103a and is located on the front side of the rear frame portion 103 of the feeding support frame 102, is connected to the front surface of the feeding case 42 of each feeding device 40. The tank support 108 is connected to the front side of each of the lower thinned bottom portions 31a of the fertilizer tank 31 by connecting bolts 104a. It is allowed to.
[0063]
  As shown in FIGS. 22, 23, and the like, a connecting member 109 is attached across each of the pair of left and right tank columns 107 and the front frame portion 104 of the feeding frame body 102, and the tank column 107 and the feeding frame body 102 are coupled to each other. The members 109 are connected to support each other.
[0064]
  As shown in FIG. 21, the feeding support frame 102 includes the rear frame portion 103 and the front frame portion 104 that are aligned in the longitudinal direction of the vehicle body and parallel to each other, and the front frame portion 104 and the rear frame portion. A pair of left and right outer connecting frame portions 105 made of sheet metal that connects both ends of the frame portion 103, and a front side slightly inward of the vehicle body and near the connecting member 109. Each of the pair of left and right inner connecting frame portions 106 connecting the frame portion 104 and the rear frame portion 103 is configured.
[0065]
  The blower 61 is supported by the pair of vehicle body main frames 5 of the self-propelled vehicle body by the mounting structure shown in FIGS. 4, 13, 14, and 15.
[0066]
  That is, a through hole 75a is provided in each of the pair of left and right sheet metal body frames 75, the rotation shaft core 62c of the blower 62 of the blower 61 is laterally directed to the vehicle body, and the outlet 62b of the blower 62 is slightly upwardly directed toward the vehicle body. It is in a state of facing backward toward the fertilizer feeding device 40, and further, the blower 62 is positioned between the pair of left and right sheet metal body frames 75, and the electric motor 63 of the blower 61 is the one sheet metal. The through hole 75a of the vehicle body frame 75 is disposed below the driver seat 4 so that the intake duct 68 is inserted through the through hole 75a of the other sheet metal body frame 75. The lower end side of the blower case is connected to the support body 77 fixed to the vehicle body main frame 5 which is positioned by a connecting bolt. The sheet metal body frame 75 is connected via a rubber cushioning material 75b attached around the lower end side of the through hole 75a of the sheet metal body frame 75 through which the electric motor 63 passes. Thus, the electric motor 63 is received and supported.
[0067]
  As shown in FIG. 15, a portion connected to the wind inlet 48 of each of the two fertilizer feeding devices 40 located on the outermost lateral side of the distribution duct portion 66 in the air duct 65, and the two The distribution duct portion 66 is made as a separate part between each of the two fertilizer feeding devices 40 inside the vehicle body adjacent to the fertilizer feeding device 40 and connected to the air intake 48. The diaphragm forming member 113 such as 25 is provided to provide a throttle part 114. The throttle part 114 branches into the both ends of the distribution duct part 66 at the central portion 66a of the distribution duct part 66 and flows in. A fertilizer feeding device 40 on the inner side of the vehicle body that gives flow resistance to the fertilizer transporting wind and the fertilizer transporting wind is connected to the windward side of the distribution duct portion 66, and a fertilizer on the outer side of the vehicle body that is connected to the leeward side. So that it flows as much as possible evenly distributed in the out unit 40.
[0068]
  As shown in FIGS. 6 and 8, in each feeding case 42, one residual fertilizer take-out port 49 common to the two fertilizer feeding devices 40, 40 is provided on the front side of the lower portion of the feeding case 42, and the feeding case is provided. 42, a pipe member 127 made of an inflexible resin which is manufactured as a separate part and is connected to the residual fertilizer feed port 49 at the base end side, and one end side is connected to the distal end side of the pipe member 127. A residual fertilizer discharge line 129 is constituted by the flexible hose 128.
[0069]
  That is, as shown in FIG. 29, the valve is provided via the support shaft 131 by the open / close lever 132 attached to the end of the support shaft 131 of the valve body 130 that is swingably opened and closed inside the residual fertilizer outlet 49. By swinging the body 130 to the open side and opening the residual fertilizer take-out port 49, the fertilizer remaining in the feed case of the two fertilizer feeding devices 40 flows down from the residual fertilizer take-out port 49 to the discharge pipe 129. The hose 128 can be taken out from a takeout port 128a (FIG. 26) formed by the front end side. When this fertilizer removal is not performed, as shown in FIG. 26, the hose 128 is attached to the hose cap 133 which is also used as a hose holder fixed to the vehicle body portion by attaching the fertilizer removal port 128a of the hose 128 to the hose 128. It can be stored with the opening closed.
[0070]
  In each fertilizer feeding device 40, as shown in FIG. 30, a cleaning brush 164 that cleans the feeding roll 43 is provided on the lower side of the feeding roll 43. The cleaning brush 164 is fixed to the support portion 165 of the feeding case 42 in a state in which the center extension line 164b of the brush bristle portion 164a in the extended state is disengaged from the rotation axis 43b of the feeding roll 43. The fertilizer is scraped out from the feeding recess 43a of the roll 43 by the brush bristles 164a.
[0071]
  As shown in FIG. 7, a positioning ring 167 is attached to one end portion of the rotation support shaft 47 and a portion between the feeding rolls 43. The positioning ring 167 positions the feeding roll 43 with respect to the rotation support shaft 47 in the direction of the rotation support shaft, and is fixed to the rotation support shaft 47 by the fixing structure shown in FIGS. .
  That is, a notch 47c as shown in FIG. 32 (b) is provided on the protrusion 47b provided on the rotation support shaft 47 so that the rotation support shaft 47 and the feeding roll 43 are engaged with each other so as to be integrally rotatable. A locking claw 167a as shown in FIG. 32 (a) provided on the inner peripheral side of 167 is inserted into the notch 47c so that the positioning ring 167 and the rotary shaft 47 are engaged with each other. Is fixed to the rotation support shaft 47.
[0072]
  The fertilizer supply port 42b provided so that the fertilizer from the feed roll 43 is dropped to the fertilizer discharge port 41 in the feed chamber in which the feed roll 43 of the feed case 42 is located has a shape as shown in FIG. That is, the length L2 in the direction along the fertilizer discharge direction at the fertilizer discharge port 41 is larger than the length L1 in the direction along the rotation axis 43b of the feeding roll 43.
[0073]
  By turning on and off the transmission to the two seedling planting mechanisms 22 of the plurality of seedling planting mechanisms 22 which are located at the leftmost end of the planting machine body and those adjacent to the planting machine body 22 are planted on the left side. A small number of planting clutches 135 that enable or stop the operation, and two seedling planting mechanisms 22 of a plurality of seedling planting mechanisms 22 that are located at the rightmost end of the planting machine body and that are adjacent thereto. The small number of row planting clutch 135 that enables or stops the seedling planting of the right two rows by turning on and off the transmission to the left, the two seedling planting mechanisms 22 and the right side of the plurality of seedling planting mechanisms 22 Minority-row planting clutch 13 that enables or stops seedling planting in the center two by turning on and off the transmission to the two seedling planting mechanisms 22 located in the center other than the two seedling planting mechanisms 22. Each and is provided inside the planting case 24.
[0074]
  With respect to the seedling vertical feeding belt 26 (FIG. 2) provided so as to feed the seedlings placed on the seedling placing part at the left end of the seedling placing stand 25 and the seedling placing part adjacent thereto. A vertical feed clutch 136 for enabling or stopping seedling supply to the two seedling planting mechanisms 22 on the left side by turning on and off the transmission, and a seedling placement portion on the right end of the seedling placement stand 25 and adjacent thereto The seedling supply to the right two seedling planting mechanisms 22 is performed by turning on and off the transmission to the seedling vertical feeding belt 26 provided to vertically feed the seedling placed on the seedling placing section. A vertical feed clutch 136 for enabling and stopping, and a seedling placement portion located at two central positions other than the two seedling placement portions on the left side and the two seedling placement portions on the right side of the seedling placement stand 25 I will feed the seedlings placed on this vertically Each of the vertical feed clutch 136 for enabling and stopping the seedling supply to the two seedling planting mechanisms 22 by turning on and off the transmission to the seedling vertical feed belt 26 provided in the seedling placing stand 25 It is provided on the back side.
[0075]
  The minority line planting clutch 135 that performs transmission / reception of the transmission to the two left seedling planting mechanisms 22 and the seedling supply on / off period of the left two seedling planting mechanisms 22 to be controlled by the minority line planting clutch 135 The vertical feed clutch 136 and the one of the plurality of small-number fertilizer application clutches 90 for turning on and off the fertilizer corresponding to the two left-side seedling planting mechanisms 22 to be controlled by the small-number line-planting clutch 135. The small number of fertilizer clutch 90, that is, one small number of fertilizer supply clutch 90 for turning on and off the transmission to the two fertilizer feeding devices 40 for supplying fertilizer to the seedlings planted by the two seedling planting mechanisms 22 on the left side is the fertilizer supply device. Configured to be operated by a clutch operating device including one clutch lever 140 disposed between the section 30 and the driver seat 4. There, the clutch operating device, are configured as shown in such FIG.
[0076]
  That is, as shown in FIG. 22 and the like, the clutch lever 140 is provided at the front end portion that protrudes forward from the tank column 107 of the left connecting member 109 provided in the attachment structure of the fertilizer supply device portion 30. A support shaft 109b of a support portion 109a is supported so as to swing around a lateral axis 140a. The inner cable 141b in one of the two branch cable portions on the other end side of the operation cable 141 connected to the base end portion of the clutch lever 140 on one end side of the inner cable 141a is connected to the swing arm type of the small number of planting clutch 135. The inner cable 141b in the other branch cable portion is connected to the operation portion 135a to the swing arm type operation portion 136a of the longitudinal feed clutch 136, and the end portion of the outer cable 141c of the operation cable 141 on the clutch lever side is fixed. The swing link 142 that is swingably supported by the rear frame portion 103 of the feeding support frame 102 is connected to the operation portion 94 of the minority fertilization clutch 90 by the interlocking rod 143, whereby the clutch The lever 140 is operated by each clutch 90, 135, 136. It is in conjunction with the Department 94,135a136a.
[0077]
  That is, the clutch lever 140 is swung up and down around the axis 140a, and the clutch lever 140 is the largest in the longitudinal direction of the body of the fertilizer tank 31 as shown by a solid line in FIG. Retracting installation that retracts from the front end of the fertilizer supply unit 30 consisting of the front surface 31d at the upper end to the rear side of the vehicle body and enters the front and rear width of the fertilizer tank 31 as the maximum front and rear width of the fertilizer supply unit 30 When the entry operation position is turned ON, the inner cable 141b in each branch cable part is loosened, and the operation parts 135a and 136a are entered by the entry restoring force of the small number of planting clutches 135 and the longitudinal feed clutch 136. And the outer cable 141c is loosened to move the operating portion 94 in front of the small number of fertilizer clutch 90. And swung to the side enters by the restoring force enters by the clutch spring 93, a small number Article planting clutch 135, longitudinal feed clutch 136, become respectively engaged condition of minority Article fertilization clutch 90. That is, it becomes possible to plant and fertilize the left two strips.
[0078]
  On the other hand, as shown by a solid line in FIG. 5, the clutch lever 140 has a cutting operation position in which the front end side of the clutch lever 140 is in a lifted mounting state in which the front end portion 31 d of the fertilizer supply device section 30 projects forward. When the switch is turned OFF, the inner cable 141b in each branch cable portion is pulled to swing the operation portions 135a and 136a to the cutting position, and the lever side end portion of the outer cable 141c is pushed to swing the swing link 142 and The operating portion 94 is swung to the cutting position via the interlocking rod 143, and the minority planting clutch 135, the longitudinal feed clutch 136, and the minority fertilizing clutch 90 are each in the disconnected state. That is, seedling planting and fertilization on the left two lines are stopped.
[0079]
  Enable or stop seedling planting and fertilization on the right two linesSmallThe several-row planting clutch 135, the vertical feed clutch 136, and the small-number fertilizer application clutch 90 are provided in the mounting structure of the fertilizer supply unit 30.RightEach of the clutches 135, 136 is supported by a clutch lever 140 supported by a support shaft 109b of a support portion 109a provided at a front end portion protruding forward of the vehicle body from the tank column 107 of the connecting member 109 on the side. , 90 are switched so that they are both turned off or in a joint state. The small-number-row planting clutch 135, the longitudinal feed clutch 136, and the minority-row fertilizing clutch 90 that enable or stop seedling planting and fertilization in the central two strips are provided on the left connecting member provided in the mounting structure of the fertilizer supply unit 30. The clutch lever 140 is supported by the support portion 109a so as to be swingable up and down, and the clutches 135, 136, and 90 are both switched off or switched together. It is. The operation position OFF for switching the clutches of the clutch lever 140 to the disengaged state and the operation position ON for switching the clutches to the on state are also set for the clutch lever 140 for planting the left two lines and turning on / off the fertilizer. It is set in the same manner as the operation positions OFF and ON. Each clutch lever 140 is also planted with a small number of strips via an operation cable 141 having a pair of branch cable portions on the clutch side, similar to the clutch lever 140 for planting the left two strips and turning fertilizer on and off. The clutch 135 and the longitudinal feed clutch 136 are interlocked with each other. However, with respect to the clutch lever 140 that performs seedling planting and fertilization on / off of the center two and right two, the lever side end of the outer cable 141 of the operation cable is directly fixed to the operation portion 94 of the minority fertilization clutch 90. The small number of fertilizer clutch 90 is interlocked. Further, the pair of minority fertilization clutches 90 for turning on and off the two central fertilizations are interlocked with the clutch lever 140 by connecting these operation portions 94 with the interlocking rod 143.
[0080]
  As shown in FIGS. 27 and 28, a swing lever type clutch collective operation tool 171 supported swingably around an axis 171a by one end portion of the rear frame portion 103 of the feeding support frame 102, and An interlocking rod 172 whose one end is rotatably connected to the output arm portion 171b of the clutch collective operation tool 171 and a vehicle body laterally connected to the other end of the interlocking rod 172 so that one end is relatively rotatable. A clutch operating device 170 that operates all the small number of fertilizer application clutches 90 at a time is configured by an operating rod 173 formed of a long strip.
[0081]
  CommunicatingA connecting pin 174, which is composed of an end portion of a rod forming the moving rod 172 and connects the interlocking rod 172 to the operating rod 173 slidably enters the vehicle body laterally long hole 103 b of the rear frame portion 103. However, the end of the operating rod 173 is slidably attached to the upper surface side of the rear frame portion 103, and is configured to slide into the long hole located on the other end of the operating rod 173. The support pin 175 attached to the rear frame portion 103 is attached to the upper surface side of the rear frame portion 103 so that the other end side of the operation rod 173 is slidable. When the swinging operation is performed around the core 171a, the operating force is transmitted to one end side of the operating rod 173 by the interlocking rod 172, and the operating rod 173 is guided by the elongated hole 103b of the rear frame portion 103 and the support pin 175. Side It is arranged to slide in. When the clutch collective operation tool 171 is operated to the cutting position OFF, the operating rod 173 is slid in the cutting direction off shown in FIG. 28, and one of the operation portions 173a provided at a plurality of locations of the operating rod 173 is When a small number of fertilizer clutch 90 that enters and exits two fertilizers on the outer side of one vehicle body is in the on state, the operation member 94 of this small number of fertilizer clutch 90 is pressed to act on the minority fertilizer clutch 90. When the switching operation is switched to the cutting state, and the other one of the plurality of operation portions 173a is in the on state, the small number of fertilization clutch 90 that turns on and off the two pieces of fertilization on the inner side of the vehicle body. The operation member 94 is pressed to switch the minority fertilization clutch 90 to the disengaged state, and the other one of the plurality of operation parts 173a is connected to the outside of the other vehicle body. It is configured to press and act on the swing link 142 interlocked with the operation member 94 of the minority fertilization clutch 90 that enters and exits two fertilizations, and switches the minority fertilization clutch 90 to the cut state. is there. At this time, since the operation member 94 does not operate the inner cable 141a of the operation cable 141, the minority fertilization clutch 90 is switched to the disengaged state while the clutch lever 140 remains in the clutch engaged position ON. From this state, when the clutch collective operation tool 171 is operated to the clutch engagement position ON, the operation rod 173 is slid in the engagement direction on shown in FIG. 28, and each of the operation portions 173 a of the operation members 173 a The pressing operation on the swing link 142 is released, and the minority fertilization clutch 90 is returned to the engaged state by the clutch spring 93.
[0082]
  That is, in the clutch operating device 170, by operating the clutch collective operation tool 171 to the clutch disengagement position OFF, even if each clutch lever 140 is in the clutch engagement position ON, the small number of clutches 135 and the few Only a small number of fertilization clutches 90 among the fertilization clutches 90 can be switched to the cut state in preference to the clutch lever 140. As a result, each clutch lever 140 is operated to the clutch engagement position ON and the clutch batch operation tool 171 is operated to the clutch disengagement position OFF. All the seedling planting mechanisms 22 are driven in the state of entering, and all the strips can be planted without fertilization.
[0083]
  FigureAs shown in FIG. 5, the swing link 146 connected to each clutch lever 140 via the operation rod 145 is such that the clutch lever 140 is turned off when the seedling planting device 20 is lifted and operated in the non-working state. If this is the case, the clutch lever 140 is automatically entered and switched to the operation position ON to automatically switch each of the small number planting clutch 135, the longitudinal feed clutch 136, and the small number fertilizer application clutch 90 to the incoming side. is there. That is, when the seedling planting device 20 is raised, if the clutch lever 140 is in the off position OFF, the rocking link 146 is rocked by the lifting driving force of the link mechanism 6, and the operation rod 145 is moved. The clutch lever 140 is turned on and switched to the operation position ON.
[Brief description of the drawings]
[Fig. 1] Side view of the entire riding rice transplanter with fertilizer application
[Figure 2] Plan view of the entire riding rice transplanter with fertilizer application
[Fig. 3] Side view of seedling planting device
Fig. 4 Rear view of fertilizer supply unit
FIG. 5 is a side view of the fertilizer supply unit.
[Fig. 6] Vertical side view of fertilizer feeding device
[Figure 7] Longitudinal rear view of fertilizer feeding device
[Figure 8] Front view of fertilizer feeding device
FIG. 9 is a plan view inside the feeding case.
FIG. 10 is a plan view of the blower unit.
FIG. 11 is a side view of the blower unit.
FIG. 12 is a cross-sectional view of the intake duct tip and muffler cover
FIG. 13 is a left side view of the blower arrangement part.
FIG. 14 is a right side view of a blower arrangement part.
FIG. 15 is a plan view of a blower arrangement part.
[Fig. 16] Plan view of a small number of fertilizer clutch
FIG. 17 is a side view of the fertilizer application adjustment mechanism.
FIG. 18 is a cross-sectional view of a fertilizer application adjustment mechanism
FIG. 19 is a plan view of a link mechanism.
FIG. 20 is a rear view showing the air vent mechanism and the arrangement portion of the groove fertilizer.
FIG. 21 is a plan view of the feeding support frame.
FIG. 22 is a side view of the clutch lever arrangement part.
FIG. 23 is a plan view of a clutch lever arrangement portion.
FIG. 24 is an explanatory view showing the operation position of the clutch lever.
FIG. 25 is a cross-sectional view showing a throttle portion of the air duct.
FIG. 26 is a front view showing a retracted state of the hose in the discharge pipe.
FIG. 27 is a schematic plan view of the clutch operating device.
[Figure 28] Plan view of a small number of fertilizer clutch
FIG. 29 is a side view of the opening / closing lever arrangement part.
FIG. 30 is a side view of a longitudinal section at the cleaning brush arrangement portion of the feeding device.
FIG. 31 is a sectional view showing a mounting structure of a positioning ring
32A is a cross-sectional view of a positioning ring, and FIG. 32B is a cross-sectional view of a feeding roll rotating spindle.
Fig. 33 Top view of fertilizer supply port
[Explanation of symbols]
  4 Driver's seat
  20 Seedling planting equipment
  22 Seedling planting mechanism
  30 Fertilizer supply unit
  30d Front end of fertilizer supply unit
  90 Minority fertilizer clutch
  135 Minority Planting Clutch
  140Clutch operating tool
  171 Clutch operation tool
  S fertilizer application equipment
  ON Clutch position

Claims (2)

At the rear of the self-propelled vehicle body, a seedling planting device having a plurality of seedling planting mechanisms arranged in the lateral direction of the aircraft is connected to be freely movable up and down, and separately around the seedling planting location by the plurality of seedling planting mechanisms. It is a rice transplanter with a fertilizer application device equipped with a fertilizer supply device,
A plurality of small number of planting clutches that enter and exit the transmission to a part of the plurality of seedling planting mechanisms are provided for each separately entering and operating freely,
A plurality of small number of fertilization clutches that enter and cut off fertilizer corresponding to a part of the plurality of seedling planting mechanisms are provided separately and can be operated freely.
One clutch operating tool for switching the interlocking operation between the small number of line planting clutches and the small number of line fertilization clutches having the same seedling planting mechanism to be controlled, the plurality of the small number of line planting clutches and the small number of line fertilization clutches Prepared for each of the
A fertilizer application apparatus comprising a single clutch collective operation tool for switching the plurality of minority fertilization clutches to the cut side while maintaining the plurality of minority planting clutches on the entry side in preference to the plurality of clutch operation tools. Tsuki rice transplanter. The clutch operation tool is provided so as to be swingable between a fertilizer supply device section in the fertilizer application and a driver seat located on the front side of the fertilizer supply device section,
2. The rice transplanter with a fertilizer application device according to claim 1, wherein the clutch operating tool is in an attached state in which the clutch operating tool is retracted to the rear side of the vehicle body from the foremost end portion of the fertilizer supply device portion .

Images