JP2011000007A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanter that has a short longitudinal length of machine body and has a small turning radius.SOLUTION: The seedling transplanter is loaded with an engine 9 on a transmission case 7 of a traveling part arranged at rear part of the traveling part 1a, projects a transmission case 30 of a planting part for driving a seedling planting apparatus 5 from the transmission case 7 of the traveling part to its forward, is provided with a seedling supply apparatus 4 positioned at an approximately longitudinal center on the traveling part 1a on the transmission case 30 of the planting part, a seedling taking device 43 that takes out seedlings at the front side of the seedling supply apparatus 4 and supplies the seedlings to the seedling planting apparatus 5, and a control handle 6 rising from the transmission case 7 of the traveling part upward to the rear at the side part of the engine 9.

Description

  The present invention relates to a seedling transplanter for planting seedlings such as vegetables in a field.

  As a conventional example of a seedling transplanter, for example, as described in Japanese Patent Application Laid-Open No. 2008-154533, a seedling is taken out from a seedling mount on a traveling vehicle body by a seedling device and supplied to a seedling planting device. There is a seedling transplanter in which the device reciprocates in the vertical direction to plant seedlings in the field.

JP 2008-154533 A

  The conventional seedling transplanting machine is equipped with an engine on the front side of a traveling vehicle body having front and rear traveling wheels, and the seedlings on the seedling placing table provided at the rear are taken out by a seedling collecting device provided at the center, and a seedling planting device The seedlings are planted in the field near the rear wheels, and the operator holds the handle that extends to the rear of the traveling vehicle body to perform the steering operation. For this reason, this seedling transplanter is long from the front end of the engine to the rear end of the handle, cannot make a small turn, and is unusable in a narrow field surrounded by fences and fences.

  Therefore, an object of the present invention is to provide a seedling transplanting machine that shortens the front-rear length of the machine body and makes a small turn.

The problems of the present invention are solved by the following technical means.
According to the first aspect of the present invention, a planting unit that mounts an engine 9 on a traveling unit mission case 7 disposed at the rear of the traveling unit 1a and drives the seedling planting device 5 forward from the traveling unit mission case 7 is provided. A mission case 30 is overhanged, and a seedling supply device 4 is provided on the planting portion mission case 30 at a substantially front and rear center on the traveling unit 1a. A seedling transplanter 43 is provided, in which a seedling collecting device 43 is provided, the side portion of the engine 9 is raised from the traveling unit transmission case 7 toward the rear upper side, and the steering handle 6 is provided.

  With this configuration, an operator walking in the rear part of the aircraft takes the steering handle 6 and travels the traveling unit 1 a, takes out the seedling on the seedling supply device 4 by the seedling collection device 43 and supplies it to the seedling planting device 5. Plant in the field.

  From the front end of the traveling unit 1a to the rear end of the steering handle 6 because the steering handle 6 is raised from the side of the engine 9 mounted on the traveling unit mission case 7 disposed on the rear of the traveling unit 1a. Since the front and rear length of the head is shorter than before, a small turn is possible, and the seedling supply device 4 is located at the substantially front and rear center on the traveling portion 1a, so that the planting operation proceeds and the seedling supply device 4 is loaded. Even if the seedlings decrease and become lighter, stable planting can be maintained without breaking the overall weight balance. Further, since the seedling planting device 5 performs the planting operation on the front side of the traveling unit 1a, the planting apparatus 5 can approach and plant the plant even in forward traveling.

It is the whole vegetable transplanter side view. It is a whole top view of a vegetable transplanter. It is a perspective view of the connection part of a traveling part mission case and a planting part mission case. It is a perspective view of a suppression wheel. It is a side view of a seedling collecting device. It is a top view of a seedling collection device. It is a top view of a seedling stand. It is a plane sectional view of a seedling tray moving device part. FIG. It is an effect explanation top view of a seedling stand. It is operation | movement description front sectional drawing of a seedling mounting stand. It is a function explanatory perspective view of a control means. It is side surface sectional drawing which shows the transmission structure of the switching mechanism part of a horizontal displacement. It is a plane section expanded view showing a power transmission structure of a change mechanism part of a lateral movement amount. It is a top view of a lateral movement switching lever part. It is a hydraulic circuit diagram. It is a side view of the seedling planting device. It is a top view of the seedling planting apparatus 5. It is a side view of a suppression wheel part. It is the side view which attached the riding step. It is a perspective view of a conveyance belt.

  As an embodiment of the present invention, a vegetable transplanter as an example of a seedling transplanter will be described in detail with reference to the drawings.

  This vegetable transplanter 1 is a seedling planting unit 1b composed of a seedling feeding device 4 and a seedling planting device 5 while the vehicle is traveling with the traveling unit 1a constituted by traveling wheels 2 and 3 straddling the ridge U. The vegetable soil block seedling S in the tray T is planted on the upper surface of the ridge U. The operator appropriately controls the aircraft with the steering handle 6 provided at the rear of the aircraft while walking between the toes U. Hereinafter, the configuration of each unit will be described.

  In the traveling unit 1 a, an engine 9 is disposed on the upper part of the traveling unit mission case 7. A hydraulic pump 10 that is driven by the power of the engine is provided on the left side surface of the engine 9. Further, a fuel tank 11 and the like are provided on the upper side of the engine 9, and a bonnet 12 covers the upper part thereof. A long connecting frame 13 having a rectangular shape in side view is integrally provided on the front side of the traveling unit transmission case 7, and a main frame 14 that pivotally supports a front wheel support arm 18 forward from the front left and right ends of the connecting frame 13. Are firmly connected. A left and right traveling transmission case 16 is integrally attached to a left and right pivoting cylinder portion 15 projecting from the left and right side surfaces of the traveling section transmission case 7, and the left and right rear wheels 2 as driving traveling wheels are pivotally supported at the tip of the traveling transmission case. ing.

  The left and right front wheels 3 that are driven traveling wheels at the lower ends of the left and right front wheel support arms 18 are pivotally supported, the rear wheel support portion and the front wheel support portion are connected by a connecting rod 8, and the left and right front wheel support arms 18 and the left and right travel transmission case 16 are connected. Due to the same length, as the rear wheel 2 is raised and lowered by the machine control mechanism described later, the front wheel 3 is also raised and lowered simultaneously, and the machine is raised and lowered in parallel.

  The traveling unit 1a is provided with a machine body control mechanism that controls the machine body position by moving the left and right rear wheels 2 up and down relative to the machine body. In this airframe control mechanism, an elevating cylinder 21 is provided forward from a hydraulic valve unit 20 disposed on a traveling unit mission case 7, and a balance rod 22 is arranged in the vertical direction at the tip of a piston rod of the elevating cylinder 21. It is attached so as to be rotatable around its axis. The balance rod 22 slides along the guide shaft 24 supported by the hydraulic valve unit 20 and the mounting member 23 attached to the main frame 14 at both front and rear ends.

  The left and right end portions of the balance rod 22 are connected to the left and right swing arms 25 fixed to the left and right rotating cylinder portion 15 via left and right connecting rods 26. A rolling cylinder 27 is incorporated in the left connecting rod 26, and the rolling cylinder 27 is expanded and contracted to change the length and move the rear wheel 2 up and down on one side.

  The elevating cylinder 21 and the rolling cylinder 27 are operated by controlling the hydraulic oil supplied from the hydraulic pump 10 by the vertical control valve 20a and the horizontal tilt control valve 20b (FIG. 16) in the hydraulic valve unit 20.

  When the rolling cylinder 27 is fixed and the elevating cylinder 21 is expanded and contracted, the left and right rear wheels 2 are moved up and down by the same amount in the same direction, and the body is raised and lowered. Further, when the rolling cylinder 27 is expanded and contracted, the rear wheel 2 on the rolling cylinder 27 side moves up and down relative to the other rear wheel 2, and the airframe tilts left and right.

  The steering handle 6 is raised substantially vertically from the left and right sides of the traveling unit mission case 7, and the upper end of the steering handle 6 is bent substantially horizontally rearward to form the rear end portion of the left and right grip 6. Left and right side clutch levers 201 are respectively provided below the left and right grips 6a. In addition, an operation panel 202 is provided at a horizontal bent portion of the steering handle 6, and an operation for turning on and off a planting clutch and an operation for raising and lowering the machine body are transmitted to the seedling supply device 4 and the seedling planting device 5 on the operation panel 202. There are provided an elevating / lowering lever 203 for carrying out a main clutch, a main clutch lever 204 for turning on and off the main clutch, and the like.

  The lower part of the planting part transmission case 30 transmitted from the traveling part transmission case 7 is fixed to the upper surface of the connecting frame 13, and the base part of the first planting transmission case 31 is fixed to the upper part of the planting part mission case 30. Furthermore, the base of the second planting transmission case 32 is fixed to the tip of the first planting transmission case 31.

  The first planting transmission case 31 and the second planting transmission case 32 are connected to each operation mechanism of the seedling planting device 5 described later. The first planting transmission case 31 and the second planting transmission case At 32, a planting drive transmission system D1 for the seedling planting device 5 is configured, and a seedling planting tool 42 described later is disposed on the front wheel 3 of the traveling unit 1a.

  A seedling supply device 4, which will be described later, is placed on a seedling supply frame 34 attached to the upper part of the planting part mission case 30, and a preliminary seedling placement table 36 on which a seedling tray is placed on the seedling supply device 4 is a support 33. It is attached.

  The preliminary seedling stage 36 has a two-stage configuration with the upper side being moved forward than the lower side, the frame at the rear end is low, and the seedling tray T can be easily pulled out rearward. It is located in front of the rear end of 4, and the seedling tray is pulled out to be easily transferred to the seedling supply device 4.

  In addition, an empty seedling tray mounting table 37 is provided on the engine 9 at the rear of the seedling supply frame 34 so that the seedling tray that has been supplied with the seedling is placed thereon. The position of the empty seedling tray mounting table 37 is easy to be placed below the position where the operator supplies seedlings from the spare seedling mounting table 36 to the seedling supply device 4, and the rear end of the empty seedling tray mounting table 37 is operated by the operator. Since it extends to the bottom of the handle 6, it is easy to take out the empty tray from the empty seedling tray mounting table 37.

  As shown in FIG. 3, the input shaft 30 a of the planting part mission case 30 protrudes rearward from the lower end part of the planting part mission case 30, and this is inserted into the PTO extraction part 7 a of the traveling part mission case 7. As a result, the transmission is connected to the shaft on the traveling unit side in the PTO extraction portion 7a. The planting part mission case 30 is detachably attached to the connecting frame 13 by bolts 35. For this reason, by removing the bolts 35 and removing the input shaft 31a from the PTO extraction part 7a, the planting part 1b can be detached from the traveling part 1a, and the maintenance of the planting part 1b can be easily performed.

  In a side view, the planting part mission case 30 is provided forward and upward from the connection frame 13, and the first planting transmission case 31 is provided forward and downward from the upper end part of the planting part mission case 30, and the second The planting transmission case 32 is provided in the horizontal direction from the lower end of the first planting transmission case 31. With this configuration, a space for moving the balance rod 22 below the first planting transmission case 31 is ensured without making the longitudinal length of the airframe longer than necessary.

  As described above, the seedling supply device 4 is disposed almost directly above the front and rear center of the traveling unit 1a, and substantially horizontally seedling trays T containing a plurality of soil block seedlings S in the vertical and horizontal directions. The seedling tray moving device 40 that is placed and supported and intermittently moves in the vertical and horizontal directions, and the seedlings that are placed on the front side of the seedling tray moving device 40 and that are seeded from the seedling tray T by the seedling extraction claws 41 one by one. It is comprised from the seedling collection device 43 which takes out and conveys to the seedling planting tool 42.

  In addition, the seedling tray T is made of plastic that is thin and flexible, and has a large number of pot portions P arranged in a grid pattern at a predetermined pitch in the vertical and horizontal directions. The opening edge portions are connected to each other in a planar shape and molded. And the soil block seedling S is nurtured by sowing and raising seedlings in the floor soil filled in the pot portion P.

  As shown in FIGS. 5 and 6, the seedling collection device 43 includes the seedling extraction claw 41 and a claw driving mechanism 44 that drives the seedling extraction claw 41. The seedling extraction claw 41 is formed of a round bar with a pair of left and right tips, and is provided so as to be closer to each other on the tip side. The claw drive mechanism 44 reciprocates the seedling extraction claw 41 between the seedling tray T and the seedling planting tool 42 while changing the posture of the seedling extraction claw 41 and supports the pair of seedling extraction claws 41 attached thereto. A body 45, a claw guide 46 for guiding the advance and retreat of the pair of seedling extraction claws 41, and a support 47 for supporting the claw support 45 and the claw guide 46 so as to reciprocate in the longitudinal direction. .

  This claw drive mechanism 44 is attached to a transmission case 50 attached to a support body 49 made of a plate material having a lower end welded and fixed to a connecting frame 48 fixed at both ends between the main frame 14 and the planting part mission case 30. Mounting is supported. The transmission case 50 includes an input shaft 51 projecting on both right and left sides and an output shaft 52 projecting on the right side. A passive sprocket 53 provided at the right end of the input shaft 51 and the right side of the planting section mission case 30 are provided. A drive chain 56 is provided between the drive sprocket 55 provided at the tip of the drive shaft 54 protruding in the direction of power, and the power from the engine 9 is transmitted. A seedling device 43 is provided by a passive sprocket 53 provided at the right end of the input shaft 51, a drive sprocket 55 of the drive shaft 54 of the planting part mission case 30, and a drive chain 56 provided between the sprockets 53, 55. A seedling extraction drive transmission system D2 is configured. The output shaft 52 is linked to the input shaft 51 through a gear transmission mechanism, and the seedling tray moving device 40 is driven by the output shaft 52.

  A crank 57 is provided at the tip of the input shaft 51 that protrudes to the left side of the transmission case 50, and a crank pin 58 protrudes laterally from the crank 57, and the input shaft 51 is coaxial with the crank 57. A drive cam 59 is provided. A lower part of the swing arm 60 is pivotally connected to the left lower portion of the transmission case 50 via a swing shaft 61 so as to be rotatable around the left and right axes. A groove cam 62 extending in the arm longitudinal direction is formed, and a roller 63 externally fitted to the crank pin 58 of the crank 57 is inserted into and engaged with the groove cam 62.

  A support tool 47 is pivotally connected to the upper portion of the swing arm 60 via a pin 64, and this support tool 47 includes a cylindrical portion 47a through which a pipe claw support 45 is inserted and guided so as to be movable in the axial direction. The leaf portion of the seedling tray T in which the claw support 45 is moving in an arc shape can be withdrawn and moved toward the pot portion P where the leaf portion is separated. Further, the pair of seedling extraction claws 41 that are pierced obliquely upward from the block soil of the seedling S in the pot portion P are attached to the tip of the claw support 45.

  A plate-like support member 65 is attached and fixed to the upper surface of the transmission case 50 by bolts, and a roller 67 is attached to the support 47 through a bracket 66 so as to be freely rotatable. Is engaged with a cam groove 70 formed in a guide plate 69 that is swingably mounted on the pin 68. The guide plate 69 has a rolling roller 71 at the tip of the downward projecting arm, and this rolling roller 71 is in contact with the driving cam 59, and the driving cam 59 rotates counterclockwise in FIG. Thus, the guide plate 69 swings around the pin 68.

Further, the guide plate 69 is urged in a direction in which the rolling roller 71 is pressed against the drive cam 59 by a spring 72 interposed between the guide plate 69 and the support member 65.
A coil that urges the nail support 45 in the direction of retreating between the base 73 provided at the base end portion of the nail support 45 and the cylindrical portion 47a of the support 47 that fits and holds the nail support 45. A spring 74 is interposed, and a claw attachment 75 is fitted and fixed to the front end portion of the claw support 45. The bases of the pair of seedling extraction claws 41 are pivotally supported by the claw attachments 75 via shafts 76, respectively, and the pair of seedling extraction claws 41 swings so that the tips thereof are moved relative to the claw attachments 75. It is possible.

  An extrusion link 77 is pivotally connected to a lower end portion of the support tool 47 via a pin 78. A long groove 79 is formed at the tip of the push-out link 77 and is engaged with a pin 80 provided on the protruding arm of the claw attachment 75. The push-out link 77 is provided with a substantially arc-shaped cam plate 81 that can come into contact with the crank pin 58 of the crank 57. The claw guide body 46 is slidably inserted in the longitudinal direction into the claw support body 45, the base body 73 and the claw attachment 75, and the claw guide body 46 is formed of a round bar or the like, and a seedling is formed at the front end thereof. A guide portion 82 having a guide hole for inserting and guiding the take-out claw 41 is provided, an operation member 83 having an L-shape in side view is attached to the rear end, and a stopper 84 is fixed to the middle portion. A coil spring 85 is fitted between the base 73 and the base 73.

  An operating piece 86 is pivotally supported on the support 47 and is urged clockwise in FIG. 5 by a spring. The operating piece 86 has a substantially T-shape having one leg and both arms, A lock portion 86a is formed on one arm, a release portion 86b is formed on the other arm, and a pushing portion 86c is formed on the foot. The actuating member 83 fixed to the claw guide body 46 has a portion parallel to the claw guide body 46, and the parallel portion is guided to slide by a support tool 47 in a non-rotating state, and protrudes from the sliding surface. The movement of the claw guide body 46 in the protruding direction is restricted by engaging with the lock portion 86a of the operating piece 86.

  A lock arm 87 is pivotally supported on the base 73 at the rear end of the claw support 45. The lock arm 87 is urged clockwise by a spring in FIG. A flange 89 that can be engaged with the joint 88 is formed. In the above configuration, when the input shaft 51 rotates counterclockwise from the state shown in FIG. 5, the crank 57 rotates in the same direction and the roller 63 fitted to the crank pin 58 pushes the cam plate 81. The push-out link 77 is swung toward the seedling tray T side, whereby the claw mounting tool 75 and the claw support body 45 are pushed toward the seedling tray T side with respect to the support tool 47 as shown in FIG. The coil springs 74 and 85 are compressed. Thereby, the seedling extraction claw 41 protrudes and pierces the block soil of the seedling S, and the restoring force for the claw support 45 to move backward is retained.

  When the seedling extraction claw 41 protrudes and pierces the block soil of the seedling S, the seedling extraction claw 41 is regulated by the guide hole of the guide portion 82, and the distance between the tips of the right and left seedling extraction claws 41 is narrowed. The seedling extraction claw 41 is configured to be stabbed into the block soil while being pushed. Further, the claw support 45 is protruded, and the state of the claw support 45 is maintained by engaging the hook portion 89 of the lock arm 87 with the engaging portion 88 of the support 47, and the swing arm 60 and the guide plate 69 swing. do not do.

  From this state, when the input shaft 51 further rotates counterclockwise, the roller 63 slides in the groove cam 62 of the swing arm 60 so that the swing arm 60 moves away from the seedling tray T around the swing shaft 61. The seedling extraction claw 41 is moved backward with respect to the seedling tray T together with the claw support body 45, the claw guide body 46 and the support tool 47, and the block soil of the seedling S is taken out from the pot portion P.

  Thereafter, when the input shaft 51 further rotates counterclockwise, the seedling extraction claw 41 moves in a direction away from the seedling tray T together with the claw support body 45, the claw guide body 46, and the support tool 47, and the roller 67 moves to the cam groove. The seedling extraction claw 41 and the like are changed to a substantially downward posture by sliding the front upwardly shaped portion 70, and the seedling S is placed in a downward posture, and the seedling S is positioned above the front portion of the seedling planting tool 42.

  When the seedling picking claw 41 has moved to a substantially downward posture, the pushing portion 86c of the operating piece 86 comes into contact with a lock releasing member provided on the support member 65 so that the position thereof can be adjusted. When the operating piece 86 is rotated, the lock on the operating member 83 by the lock portion 86 a of the operating piece 86 is first released, and the claw guide body 46 protrudes by the urging force of the spring 85 and is held by the seedling extraction claw 41. The seedling S that is present is pushed out of the seedling extraction claw 41 and separated, and dropped into the seedling planting tool 42 from above.

  Thereafter, when the operating piece 86 further rotates, the lock arm 87 is pushed up by the release portion 86b to release the engagement between the flange portion 89 and the engagement portion 88, and the claw guide body 46 is accompanied by the biasing force of the coil spring 74. As a result, the nail support 45 moves backward. After that, the input shaft 51 is moved to the state shown in FIG. 5 by the counterclockwise rotation of FIG. 5 and the above operation is repeated.

  The seedling tray moving device 40 includes a seedling mounting base 90 on which the seedling tray T is placed. The seedling mounting base 90 is horizontally aligned with a pair of upper and lower guide rails 91a and 91b arranged in the left-right direction. It is supported movably.

  The upper guide rail 91a is connected and supported by a horizontal frame 92 fixed to the rear end of the main frame 14 and a left and right upper connection body 93, and the lower guide rail 91b is connected to the second planting transmission case 32 and the support body. 49 and the left and right connecting bodies 94, respectively. The left and right ends of the pair of upper and lower guide rails 91a and 91b are connected by a left and right saddle frame 95, and have a rectangular frame shape with high strength in plan view.

  Further, the seedling mounting table 90 has a mounting plate 96 that supports the bottom of the seedling tray T across the horizontal row of pot portions P (therefore, the upper surface of the mounting plate 96 supports and supports the seedling tray T). The mounting plate 96 is disposed between a pair of side plates 97 that are opposed to each other in the left-right direction, and the left and right end portions of the mounting plate 96 are opposed surfaces of the left and right side plates 97 ( It is fixed to the inner surface in the left-right direction).

Since the seedling stage 90 is in a horizontal state, it is easy for an operator on the side of the steering handle 6 to check the state of the seedling, and even a long seedling is unlikely to fall down.
A vertical movement drive shaft 98 is provided in the left-right direction between the left and right plates 97, and a vertical movement driven shaft 99 is provided in the left-right direction in the upper portion between the left and right side plates 97. A pair of left and right drive sprockets 100 are fixed to the drive shaft 98, and a pair of left and right driven sprockets 101 are fixed to the driven shaft 99. Further, an endless chain 102 is hung between the drive sprocket 100 and the driven sprocket 101, and a gap between the pot portions P in the vertical direction (vertical direction) of the seedling tray T is attached to the chain 102. The conveying pin 103 that engages with the left and right is projected inward in the left-right direction.

  Accordingly, when the drive shaft 98 is driven to rotate in the direction indicated by arrow A in FIG. 9, the seedling tray T is pushed by the transport pins 103 and can be moved vertically. The left and right side plates 97 are connected by other connecting members in addition to the longitudinal movement drive shaft 98 and the driven shaft 99.

  In the seedling tray moving device 40, the vertical and horizontal dimensions of the seedling tray T are the same and the openings of the pot portions P are different, but the intervals between the openings of the pot portions P are substantially the same (that is, in the vertical and horizontal arrangement directions). Two kinds of seedling trays T (with different pitches between the centers of the pot parts P and the number of pot parts P) are mounted. Therefore, the transport pin 103 is engaged with each between the pot parts P. Instead, the gap between the vertical pot portions P of the two kinds of seedling trays T is provided at a position where they coincide with each other in the vertical direction.

  At the upper end portion of the mounting plate 96 of the seedling mounting table 90, an extended seedling mounting portion 300 made of a flat plate formed of a resin material in a scallop shape is rotatably provided. That is, the base part of the extended seedling mounting part 300 is rotatably mounted on the rotation fulcrum shaft 301 provided at the upper end part of the mounting board 96, and the mounting surface on which the seedling tray T of the mounting board 96 is placed. The inclined state Z1 located on the extended line of 96a and the forward inclined state Z2 bent forward from the extended line of the mounting surface 96a are provided so as to be freely changeable in posture. Then, an arm 302 provided integrally with the extended seedling mounting section 300 and planting described later (operations for turning on / off a planting clutch that is transmitted to the seedling feeding device 4 and the seedling planting device 5 and a lifting operation of the machine body) When the lifting lever 203 is connected to the operation wire 303 and the planting lifting lever 203 is operated to turn off the planting clutch or to raise the machine body for turning the machine body, the extended seedling mounting part 300 is connected via the operation wire 303. Are linked so as to change the posture from the inclined state Z1 positioned on the extended line of the mounting surface 96a of the mounting plate 96 to the forward inclined state Z2 bent forward from the extended line of the mounting surface 96a.

  Reference numerals 304 shown in FIG. 1 denote left and right tray holders respectively provided on the left and right sides of the upper end portion of the placement plate 96 of the seedling stage 90, and extend upward at the left and right side positions of the upper end portion of the placement plate 96. It has a shape that is bent inward, and is configured to be able to support the upper side surface of the seedling tray T where there are no seedlings on both the left and right sides of the bent portion. That is, when the posture of the extended seedling mounting part 300 is changed from the inclined state Z1 positioned on the extended line of the mounting surface 96a of the mounting plate 96 to the forward inclined state Z2 bent forward from the extended line of the mounting surface 96a, The tray holder 304 supports the left and right side portions of the seedling tray T, and prevents the seedling tray T from falling forward or being bent and damaging the seedling.

  Reference numeral 305 denotes an adjusting bolt that regulates the angle of the forward seedling mounting portion 300 in the forward inclined state. The tip of the adjusting bolt 305 contacts the arm 302 provided integrally with the extending seedling mounting portion 300, thereby extending the seedling. The angle of the forward inclined state Z2 of the mounting part 300 is regulated. That is, as the adjustment bolt 305 protrudes toward the arm 302 side, the tip of the adjustment bolt 305 comes into contact with the arm 302 earlier when the posture of the extension seedling mounting portion 300 is changed to the front inclination state Z2, and the front inclination state is increased. The angle becomes smaller. In the case of the seedling tray T formed of a soft material, if the angle of the forward inclined state of the extended seedling mounting portion 300 is increased, the seedling tray T bends forward and damages the seedling. The angle of the forward seeded state of the extended seedling mounting part 300 is reduced.

  As described above, when the planting clutch lever is disengaged or the body is lifted by the planting lifting / lowering lever 203 during the turning of the machine body, the extended seedling mounting part 300 is placed on the mounting surface 96a of the mounting plate 96 via the operation wire 303. Since the posture is changed from the inclined state Z1 positioned on the extended line to the forward inclined state Z2 bent forward from the extended line of the mounting surface 96a, the left and right grips 6a of the steering handle 6 are grasped and the rear part of the aircraft is pushed down to turn the aircraft. Since the extended seedling mounting portion 300 extending toward the operator who performs the operation automatically changes its posture toward the front, the operator can turn the extended seedling mounting portion 300 without disturbing the work. Yes.

  Here, the lateral movement mechanism of the seedling tray T will be described with reference to FIG. 8. The left and right side plates 97 penetrate between the left and right bearing members 104 that are disposed on the left and right sides of the seedling mount 90 and are supported by the left and right rod frames 95. In addition, a lateral movement shaft 105 formed with a special screw (napier screw) that joins valleys of right and left screws cut at the same pitch is supported so as to be rotatable about the left and right axes. A slider 106 that engages with the special screw is externally fitted. The slider 106 is engaged with a pair of left and right engaging pieces 107 provided on the back surface of the mounting plate 96 of the seedling mounting table 90.

  Power is transmitted from the output shaft 52 to the lateral movement shaft 105 via the winding transmission mechanism 108a in the transmission case 108, and the lateral movement shaft 105 is intermittently driven to rotate the lateral movement shaft 105 intermittently. When the rotary drive is performed, the slider 106 intermittently moves in the left-right direction and is folded back at the end of the screw formed on the horizontal movement shaft 105, so that the seedling stage 90 is reciprocated in the left-right direction. . A seedling stage drive system D3 is configured by the winding transmission mechanism 108a in the transmission case 108.

  The horizontal movement shaft 105 is stopped when the seedling S is taken out from the pot part P by the seedling picking claw 41, and rotates after the seedling S is taken out from the pot part P. It is configured to intermittently rotate so as to move the seedling mounting table 90 by one pitch in the arrangement direction (left-right direction). It should be noted that the lateral movement amount can be switched in the transmission case 50 so that the lateral movement amount corresponding to the pitch in the lateral direction of the pot portion P of the two kinds of seedling trays T used selectively can be selected. .

  Next, in the vertical movement mechanism of the seedling tray T, the vertical movement cams 109 are fixed to both the left and right sides of the horizontal movement shaft 105, and the vertical movement operation shaft 110 is rotatably supported between the left and right side plates 97 on the seedling stage 90. The vertical movement operating shaft 110 is provided with a pair of left and right followers 111 that engage with the vertical movement cam 109 when the seedling stage 90 moves to the leftmost end or the rightmost end. Further, the longitudinal movement operating shaft 110 is interlocked and coupled to a longitudinal movement means 113 provided on the left end side of the longitudinal movement drive shaft 98 via a link 112 or the like.

  When the seedling stage 90 moves to the left and right ends, the follower 111 is pushed by the longitudinal movement cam 109 to rotate the longitudinal movement operation shaft 110 and the longitudinal movement means 113 is operated via the link 112. The vertical movement drive shaft 98 is rotated so as to transfer the seedling tray T by one pitch of the pot portion P in the vertical arrangement direction of the pot portion P (the arrangement direction orthogonal to the left-right direction).

  Thus, when the removal of the soil block seedling S from the horizontal row of pot portions P is completed, the seedling tray T is moved vertically by an amount corresponding to the vertical interval of the pot portions P. The portion of the seedling tray T after the seedling S is taken out is folded back to the lower surface side of the mounting plate 96 along the drive sprocket 100. As shown in FIG. In the lower part, a plate member is formed in an arc shape centered on the axis of the longitudinally moving drive shaft 98, and guide members 114 for guiding the seedling tray T along the drive sprocket 100 are provided at the left and right ends and the central portion. It is attached and fixed to.

  Reference numeral 310 shown in FIG. 2 denotes an electric motor that drives and rotates the horizontal movement shaft 105 to move the seedling stage 90 left and right. When a seedling supply switch 311 provided on the operation panel 202 is pressed, the horizontal movement shaft 105 is driven to rotate. Then, the seedling stage moving end detection sensor provided on the guide rail 91a is directed toward the left and right side ends (for example, the steering handle 6 offset from the left and right center of the body and the opposite position in the left and right direction of the body). 312 is moved until it is detected that the seedling stage 90 has moved to the left and right side ends.

  Accordingly, when the seedling tray T is placed on the seedling stage 90 and the seedling transplanting operation is started, when the seedling supply switch 311 is pressed, the seedling stage 90 is moved to the left and right side ends (for example, the operation offset from the left and right center of the aircraft). Since the handle 6 is moved to the opposite position in the left-right direction of the machine and stopped, the seedling collection device 43 can always take out the seedling from the seedling at the end of the seedling tray T at the start of seedling transplanting work, and the seedling is wasted The seedling transplanting work can be performed with good workability. An electric motor 313 for driving the longitudinally driven driven shaft 99 is provided. When the seedling supply switch 311 is pressed, the electric motor 313 is activated, and the seedling device 43 causes the seedling tray 43 placed on the seedling mounting base 90 to be seeded. It is configured to send it down to the position where it is taken out.

  Further, when the body is turned (when the planting clutch is disengaged or the body is lifted by the planting lift lever 203), the electric motor 310 is operated, and the steering handle 6 is offset from the center of the body left and right. When it is moved to the end position on the opposite side in the left and right direction of the body and turning is completed (when the planting clutch 203 is engaged or the body is lowered by the planting lift lever 203), the reverse operation is performed by the amount of operation of the electric motor 310. If the seedling stage 90 is returned to the original position, the left and right grips 6a of the steering handle 6 are gripped and the rear part of the aircraft is pushed down to rotate toward the operator who performs the turning operation of the aircraft. Since the extended seedling mounting part 300 moves to the opposite side of the aircraft in the left-right direction with respect to the steering handle 6, the seedling mounting base 90 disappears in front of the steering handle 6, and the operator is obstructed by the extended seedling mounting part 300. Razz work with good turning work can be performed.

  The guide members 114 on both the left and right sides respectively hold down the left and right edge sides of the top surface of the seedling tray T to prevent the bottom of the pot portion P of the seedling tray T from moving (lifting) away from the placement plate 96. A member 115 is provided. The holding member 115 is formed by bending an elastically deformable steel bar, the base side 115a is fixedly attached to the guide member 114, and the midway part is in contact with the upper surface of the seedling tray T and elastically presses it. However, the tip side is configured to be separated from the seedling tray T.

  A restricting means 116 for restricting movement in the direction away from the placement surface 96a of the seedling tray T is disposed on the rear side in the vertical movement direction of the right and left pressing members 115. The regulating means 116 is formed by bending an elastically deformable steel bar, the midway portion is a pressing portion 116a that contacts the upper left and right side edges of the seedling tray T, and the one end side serves as the pressing portion 116a. The mounting portion 116b is attached to the side plate 97 so as to be elastically pressed to the T side, and the other end side is a knob portion 116c formed in an arch shape.

  The attachment portion 116b is rotatably attached to the side plate 97 by a bolt 93, and a restricting posture for restricting movement of the pressing portion 116a in a direction away from the placement surface 96a of the seedling tray T (FIGS. 9 to 12). (See the solid line) to grip the knob portion 116c, pull up the holding portion 116a, and rotate the restricting means 116 outward in the left-right direction around the attachment portion 116b, so that the seedling tray T is placed on the placement plate 96. The restricting means 116 can freely change its posture to a retracted posture (indicated by a virtual line in FIG. 12) that can be placed from the vertical direction.

  The mounting plate 96 of the seedling mounting table 90 is provided with a detecting means 117 for detecting the passage of the seedling tray T in the vicinity of the right side (or left side) regulating means 116. The detection means 117 includes a contact member 118 that contacts the bottom of the pot portion P on the right end side of the seedling tray T, a biasing member 119 that biases the contact member 118 toward the pot portion P, and a micro And a contact sensor 120 such as a switch.

  The contact member 118 is supported by a support member 121 whose rear side in the vertical movement direction of the seedling tray is fixed to the lower surface side of the mounting plate 96 so as to be rotatable around the left and right axes via a support shaft 122. Through the opening 123 formed in 96, it is possible to project to the placement surface 96 a side of the placement plate 96 so as to be freely retractable. The contact member 118 is in contact with the lower surface of the mounting plate 96 and has a stopper 124 that restricts the rotation of the contact member 118 in the protruding direction (the direction protruding from the opening 123 toward the seedling tray T). It is fixed and provided.

  The urging member 119 is formed of a spring plate or the like, the rear side in the seedling tray vertical movement direction is fixed to the support member 121, and the front side in the seedling tray vertical movement direction is in contact with the lower surface of the contact member 118, The contact member 118 is urged in the protruding direction by an elastic force. The contact sensor 120 is fixedly attached to the support member 121, and the contact 120 a is in contact with the middle portion of the biasing member 119.

  Accordingly, the contact member 118 is pressed by the pot portion P and retracted to the lower surface side of the mounting plate 96 while the seedling tray T is passing over the detection means 117 as indicated by a virtual line in FIG. Then, the contact 120a of the contact sensor 120 is pressed via the biasing means 119, and the presence of the seedling tray T is detected. Then, as shown by the solid line in FIG. 9, when the seedling tray T passes over the detection means 117, the last pot portion P is separated from the contact member 118, and the contact member 118 is placed by the urging member 119. While projecting to the surface 96a side, the pressing of the contact 120a of the contact sensor 120 is released, and it is detected that the seedling tray T is separated from the detection means 117, that is, the passage of the seedling tray T.

  When the detection means 117 detects the passage of the seedling tray T, the detection means is operated to notify the operator that the seedling tray T has to be replenished by operating a notifying means including a buzzer and a lamp. In FIG. 9, the detection means 117 detects the passage of the seedling tray T when the second pot portion P from the rear in the longitudinal arrangement direction of the pot portion P comes to the seedling extraction position by the seedling extraction claw 41. The seedling tray T is replenished, but the passage of the seedling tray T may be detected on the rear side of the pot portion P in the longitudinal arrangement direction.

  When the operator knows that the seedling tray T has passed the detection means 117 by the operation of the notification means, the operator changes the posture of the right and left regulating means 116 to the retracted position and places the seedling tray T on the placement plate 96. After the replenishment, the left and right regulating means 116 are returned to the regulating posture. As described above, since the detection unit 117 is provided in the vicinity of the regulation unit 116, it is possible to prevent malfunction of the detection unit 117 due to the raising of the seedling tray T. Therefore, the place where the detection unit 117 is provided may be anywhere as long as the lifting of the seedling tray T can be regulated by the regulation unit 117.

  The regulating means 116 may regulate the lifting of the seedling tray T just by contacting the seedling tray T without pressing the left and right side edges of the top surface of the seedling tray T, and the contact member 118 can be used as the seedling tray. You may make it contact the upper wall of T (part which connects the opening edge of the pot part P) lower surface. Further, as the detecting means 117, a contact of a contact sensor such as a micro switch or a limit switch may be directly brought into contact with the seedling tray T or the contact member 118.

  Here, a mechanism for switching the lateral movement amount of the power transmission mechanism from the input shaft 51 and the lateral movement mechanism of the seedling tray T will be described. 13 to 15, a spur gear 125 is spline-fitted to the input shaft 51, and is disposed in the transmission case 50 in parallel with the input shaft 51 and the output shaft 52. An intermediate shaft 126 that is rotatably supported is provided. A transmission gear 127 that meshes with the toothless gear 125 is spline-fitted to the intermediate shaft 126, and intermittently connected from the input shaft 51 to the intermediate shaft 126. Power is transmitted to the intermediate shaft 126, and the intermediate shaft 126 rotates intermittently.

  The intermediate shaft 126 is fitted with a first lateral movement drive gear 128 and a second lateral movement drive gear 129 that are spaced apart in the axial direction so as to be relatively rotatable about the central axis of the intermediate shaft. On the other hand, on the output shaft 52, a first lateral movement driven gear 130 meshed with the first lateral movement drive gear 128 and a second lateral movement driven gear 131 meshed with the second lateral movement drive gear 129 are integrally rotatable. Is externally fitted.

  Further, the intermediate shaft 126 is spline-fitted between the first lateral movement drive gear 128 and the second lateral movement drive gear 129 so that it can rotate integrally with the intermediate shaft 126 and can move in the axial direction. A shifter 132 is provided. The shifter 132 is provided with first engagement teeth 134 that mesh with the first meshing teeth 133 formed on the first lateral movement drive gear 128, and the second meshing that is formed on the second lateral movement drive gear 129. Second engagement teeth 136 that mesh with the teeth 135 are provided.

  Accordingly, when the shifter 132 is moved in the axial direction and the first engagement tooth 134 is engaged with the first engagement tooth 133, the first lateral movement drive gear 128, the shifter 132, and the first lateral movement driven gear 130 are used. When power is transmitted and the second engagement teeth 136 are engaged with the second meshing teeth 135, power is transmitted via the second lateral movement drive gear 129, the shifter 132, and the second lateral movement driven gear 131. The output shaft 52 is intermittently rotated, and power is transmitted from the output shaft 52 to the lateral movement shaft 105 as described above, and the lateral movement shaft 105 is intermittently rotated.

  The rotation ratio between the first lateral movement drive gear 128 and the first lateral movement driven gear 130 is larger than the rotation ratio between the second lateral movement drive gear 129 and the second lateral movement driven gear 131, and the pot portion P Corresponding to two kinds of seedling trays T having different pitches, the lateral movement amount of the seedling trays T can be switched to two stages. A transverse feed switching lever 137 is disposed on the upper surface of the transmission case 50, and the transmission case 50 is inserted through an insertion hole 138 formed in the upper wall of the case 50 so as to be rotatable about a vertical axis. A rotation pin 139 is provided, and a shift pin 140 to be inserted into the circumferential groove 132a of the shifter 132 is fixed to the lower end portion of the rotation shaft 139, and the rotation operation about the axis of the rotation shaft 139 is performed. Thus, the shift pin 140 swings around the axis of the rotation shaft 139 so that the shifter 132 can be moved in the direction of the axis of the intermediate shaft 126.

  The upper part of the rotation shaft 139 protrudes from the insertion hole 138 and is fitted to the lower side of the protruding part so that one end side of the interlocking plate 141 rotates integrally. 142 is fixed. A collar 143 is externally fitted in an intermediate portion of the protruding portion of the rotating shaft 139 so as to be relatively rotatable, and an upper portion of the protruding portion of the rotating shaft 139 is a screw shaft portion 144. 145 and a washer 146 are externally fitted, and a nut 147 is screwed.

  The collar 143 is fitted with the lateral movement switching lever 137 so as to be relatively rotatable. A spring receiving portion 148 is integrally formed with the lateral movement switching lever 137. In addition, a torsion coil spring 149 is externally fitted between the lateral movement switching lever 137, the interlocking plate 141 and the contact plate 145 of the collar 143, and these torsion coil springs 149 are twisted in opposite directions. In addition, one end of the torsion coil spring 149 is hooked to the engaging pin 142 and the other end is hooked to the spring receiving portion 148 of the lateral movement switching lever 137.

  Accordingly, when the lateral movement switching lever 137 is rotated about the axis of the rotation shaft 139, the interlocking plate 141 is rotated together with the torsion coil spring 149, the rotation shaft 139 is rotated, and the shifter 132 is moved to the intermediate shaft. The lateral movement switching lever 137 is rotated from the position indicated by the solid line to the position indicated by the phantom line in FIG. 15 or from the position indicated by the phantom line to the position indicated by the solid line. Thus, the lateral movement amount of the seedling tray T is switched.

  When the lateral movement amount of the seedling tray T is switched, if the first engagement tooth 134 does not mesh with the first meshing tooth 133 or the second engagement tooth 136 does not mesh with the second meshing tooth 135, one spring 149 is twisted, and the rotation operation of the lateral movement switching lever 137 is allowed even if the rotation shaft 139 and the interlocking lever 125 do not rotate. In this state, the first or second operation is allowed. When the meshing teeth 133, 135 are in a position where they mesh with the first or second engagement teeth 134, 136, the rotating shaft 139, the interlocking lever 125, and the like are rotated by the urging force of the one twisted spring 149, The switching of the lateral movement amount of the seedling tray T is completed.

  Therefore, when the lateral movement amount of the seedling tray T is switched, the first or second engagement teeth 134 and 136 and the first or second engagement teeth 133 and 135 are used to operate the lateral movement switching lever 137. It is not necessary to adjust the timing of each part so as to engage with each other, and by simply operating the lateral movement switching lever 137, the spring charging function is used to automatically switch at a position where the switching timing matches. The switching of the lateral movement amount is facilitated.

  A screw hole 150 is formed in the upper part of the transmission case 50, and a knob bolt 151 that is screwed into the screw hole 150 is provided. A first engagement tooth 134 is provided on the transverse feed switching lever 137 with a first engagement tooth 134. A pair of insertion holes 152 that match the screw holes 150 are formed to penetrate in a state where the engagement teeth 133 are engaged with each other and a state where the second engagement teeth 136 are engaged with the second engagement teeth 135. When the knob bolt 151 is screwed into the screw hole 150 in a state where the first engagement tooth 134 is engaged with the first engagement tooth 133 or the second engagement tooth 136 is engaged with the second engagement tooth 135, The feed switching lever 137 can be fixed.

  In place of the mounting plate 96 described above, as shown in FIG. 21, it is also possible to use a transport belt 193 in which transport protrusions 194a and 194b engaged with the pot portion P of the seedling tray T from the bottom are provided at appropriate intervals. The left and right intermediate conveyance protrusions 194a of the conveyance protrusions 194a and 194b are cross-shaped in a plan view, the left and right side conveyance protrusions 194b are T-shaped, and the upper end is rounded in an arc in a side view.

  The transport protrusions 194a and 194b engage two kinds of seedling trays T having the same vertical and horizontal dimensions of the seedling tray T and having different opening sizes of the pot portion P but substantially the same distance between the opening portions of the pot portion P. It is provided at the position where

  The seedling planting device 5 includes a cup-shaped seedling planting tool 42 having a sharp lower end, as shown in FIGS. 17 and 18. The seedling planting tool 42 includes a front side member 42a and a rear side member 42b, and left and right front side member attachments rotatably supported by a front member rotating shaft 161A located behind the seedling planting tool 42. The front member 42a is integrally attached to the arm 162A, and the rear member 42b is attached to the left and right rear member attachment arms 162B that are rotatably supported by the rear member rotation shaft 161B located in front of the seedling planting tool 42. It is attached integrally. Therefore, when both members 42a and 42b rotate with the rotation shafts 161A and 161B as fulcrums, the lower portion of the seedling planting tool 42 opens and closes.

  The front member 42a and the rear member 42b rotate in conjunction with each other by an interlocking pin 163 loosely fitted in a slot formed in the front member mounting arm 162A and the rear member mounting arm 162B. Between the leg 162aA of the front member mounting arm 162A and the leg 162aB of the rear member mounting arm 162B, a spring 164 that biases the front member 42a and the rear member 42b toward the closing side is stretched. The seedling planting tool 42 performs a predetermined operation by the following operation mechanism.

  A rear link support arm 167A is rotatably attached to a support portion 33a protruding upward from the second planting transmission case 32, and a base member is pivotally attached to the support arm 167A. The moving shaft 161A is connected. A rear link drive arm 169A provided at the rear end of the second planting transmission case 32 is connected to an intermediate portion of the rear link 168A. Further, a front link support arm 167B is rotatably attached to the planting part mission case 30, and a rear member rotation shaft 161B is connected to the rear end of the front link 168B whose base is pivotally attached to the support arm. Yes. A front link drive arm 169B provided at a rear end portion of the first planting transmission case 31 is connected to an intermediate portion of the front link 168B. When both the drive arms 169A and 169B are driven and rotated, the rear link 168A and the front link 168B swing up and down while changing the position of the base portion back and forth, and the seedling planting tool 42 moves up and down while maintaining a fixed posture.

  An opening / closing arm 171 is rotatably attached to the base portion of the rear link 168A, and the distal end portion of the opening / closing arm 171 and the front side member attachment arm 162A are connected by an opening / closing rod 172. An opening / closing cam 173 that rotates integrally with the rear link drive arm 169A is attached to an intermediate portion of the rear link 168A. A roller 174 as a cam follower of the opening / closing cam is provided on the opening / closing arm 171.

  The opening / closing cam 173 engages with the roller 174 in a stroke in which the seedling planting tool 42 is lifted from a position near the bottom dead center. When the opening / closing cam 173 is engaged with the roller 174, the opening / closing rod 172 is pulled, the front member 42a and the rear member 42b are rotated in conjunction with each other, and the seedling planting tool 42 is opened. When the opening / closing cam 173 does not engage the roller 174, the seedling planting tool 42 is closed by the tension of the spring 164.

  When the seedling planting tool 42 is at the top dead center, the seedling supply device 4 drops and supplies the seedling. The supplied seedling is guided into the seedling planting tool through a cylindrical seedling guide 176 attached to the front member rotating shaft 161A and the rear member rotating shaft 161B. The seedling planting tool 42 holding the seedling descends, and at the bottom dead center, the lower part of the seedling planting tool 42 pierces the topsoil portion of the cocoon to form a seedling transplanting hole. Almost simultaneously with this, the seedling planting tool 42 opens, and the held seedling is opened into the seedling transplanting hole. The seedling planting tool 42 rises as it is, and when it rises to near the top dead center, the seedling planting tool 42 is closed.

  In order to maintain the seedling planting performance of the seedling planting tool 42, rubber material or the like is provided on the outer peripheral surface and the inner peripheral surface of the seedling planting tool 42 in the process in which the seedling planting tool 42 is planted and raised in the field. A configuration is known in which mud soil adhering to the seedling planting tool 42 is removed by sliding a scraper made of the material. The scraper that is in sliding contact with the inner peripheral surface of the seedling planting tool 42 is formed by the scraper entering the seedling planting tool 42 while the seedling planting tool 42 is opened and rising. Although it is the structure which drops mud on the inner peripheral surface of the attachment tool 42, if the seedling planting tool 42 is configured to be slightly closed immediately after the scraper enters the seedling attachment tool 42, the inner peripheral surface of the seedling planting tool 42 of the scraper The resistance to sliding on the ground increases, and the mud can be dropped well.

  In the embodiment, one seedling extraction claw 41 is provided, but a configuration in which a pair of left and right is provided is also possible. In this configuration, the inside of the seedling guide 176 provided on the seedling planting tool 42 is divided into left and right partition plates, a drop lid that opens and closes at different timings is provided at each bottom, and scraped off by the left and right seedling extraction claws 41. The seedlings are planted alternately by the seedling planting tool 42. With this configuration, the planting speed can be increased.

  A pair of left and right pressure-reducing wheels 180 are disposed behind the seedling planting position. The left and right pressure wheels 180 are attached obliquely so that the distance between them is narrower toward the lower part, rolls on the heel surface as the aircraft advances, and removes the soil around the seedling transplant hole after the seedling has been planted. It collapses to refill the hole and lightly crushes the trace.

  A pressure-reducing wheel 180 is pivotally supported at the rear end of the pressure-reducing arm 153 pivotally supported at the front end of the main frame 14, and a front pressure-reducing wheel 182 is pivotally supported at the distal end of the pressure-reducing arm 153. The first weight 160 is attached to the first weight arm 181 standing on the pivotal support portion of the pressure reducing wheel 180, and the second weight 155 is attached to the second weight arm 154 protruding forward from the pivotal portion of the front pressure reduction wheel 182 to adjust the position. Provide as possible. The first weight 160 can be changed to change the pressure reduction load of the pressure reduction wheel 180, and the pressure reduction load of the front pressure reduction wheel 182 can be changed by changing the mounting position of the second weight 155.

  A sensor arm 156 is pivotally supported at the front and rear intermediate positions of the pressure reducing arm 153, and a lift rod 157 connected to the planting depth adjusting lever 197 and a sensor rod 159 connected to the vertical control valve 20a of the hydraulic valve unit 20 are connected to the rear end thereof. Then, the vertical position of the pressure reducing wheel 180 and the front pressure reducing wheel 182 is adjusted by the planting depth adjusting lever 197.

  By adjusting the position of the planting depth adjustment lever 197 with respect to the adjustment engagement portion of the engagement guide 183 and engaging and locking it, the vertical height position of the lifting arm 157 can be adjusted. The planting depth of the seedling can be adjusted because the reference position for controlling the height of the aircraft relative to the cocoon can be set freely.

  When the pressure reducing wheel 180 rotates up and down, the rotation is transmitted to the vertical control valve 20a by the sensor arm 156 and the sensor rod 159, and the lift cylinder 21 is operated in a direction in which the angle of the sensor 192 returns. Thereby, the aircraft is controlled to move up and down so that the height from the upper surface of the cocoon to the aircraft is kept constant, and the planting depth of the seedlings is always controlled regardless of the change in the height of the cocoon, The growth of seedlings after planting is good.

The pre-repression wheel 182 levels the surface of the seedling planting plant 42 before planting the seedling, and the repression wheel 180 suppresses the side soil of the planted seedling to stabilize the seedling, and a planting depth detection sensor Also works.
The left / right tilt control valve 20b in the hydraulic valve unit 20 is switched in conjunction with the movement of a left / right tilt detection pendulum (not shown). When the airframe tilts left and right, the rolling cylinder 27 operates appropriately. Control the aircraft to return to the left and right horizontally.

  The steering handle 6 is substantially U-shaped in plan view with both ends extending rearward, and left and right grips 6a are attached to both ends. When turning or traveling on the road, the operator holds the left and right grips 6a to operate.

  Left and right side clutch levers 201 are respectively provided below the left and right grips 6a. In addition, an operation panel 202 is provided at the base of the steering handle 6, and the operation panel 202 is used to turn on / off a planting clutch that is transmitted to the seedling supply device 4 and the seedling planting device 5 and to move the aircraft up and down. A planting lift lever 203, a main clutch lever 204 for turning on and off the main clutch, and the like are provided.

  FIG. 20 shows an embodiment in which a riding step 189 is provided. A step arm 184 is pivotally supported by a shaft 185 on the left and right side portions of the traveling unit mission case 7, and a step bracket 187 and a step wheel 186 are pivotally supported at the tip thereof, and the arc hole of the step bracket 187 and the step arm 184 are connected to the butterfly bolt 191. It is attached so that the mounting angle can be changed. Note that the step arm 184 may be constituted by two parallel links so that the upper surface of the riding step 189 moves up and down while keeping the level. The support leg 192 of the riding step 189 is fixed to the vertical hole of the riding step 189 with two bolts 190 so that the height can be adjusted.

  The operator stands on the riding step 189 and performs the steering operation with the grip 6a of the steering handle 6. However, since the riding step 189 moves up and down separately from the aircraft, the running balance of the aircraft does not deteriorate.

  In addition, if the step bracket 187 and the swing arm 25 are connected by a rod with a long hole to allow play, and the riding step 189 is also raised when the body is raised to the maximum, turning becomes easy.

Further, the riding step 189 and the step wheel 186 may be made heavy so as to act as a balance weight during turning.
The operation | work which transplants a vegetable seedling to a farm field with said vegetable transplanter 1 is demonstrated. First, the seedling tray T on which the vegetable seedlings have been grown is loaded on the seedling mounting table 90, and the spare seedling tray T is mounted on the preliminary seedling mounting table 36. Then, the operator grasps the left and right grips 6a of the steering handle 6 at the rear part of the aircraft and walks along the ridges behind the right rear wheel 2 while operating the main clutch lever 204 to move the left and right front wheels 3 and the left and right rear wheels 2 together. The airframe is advanced along the groin, the planting lift lever 203 is operated, the planting clutch is engaged, and the body control mechanism is controlled to perform the transplanting operation. At this time, the seedling picking claws 41 take out seedlings one by one from the seedling tray T of the seedling mounting base 90 that reciprocates left and right, and drop them into the seedling planting tool 42. Then, after the seedling planting tool 42 has planted the seedling in the cocoon, the pair of left and right pressing wheels 180 lightly pressurizes the left and right sides of the seedling.

  In particular, in the configuration of the present invention, the engine 9 is mounted on the rear part of the fuselage, and the steering handle 6 is erected from the left and right sides of the engine 9, so that the front-rear length of the fuselage is shorter than that of the conventional one, and the small turn It is good and has a small airframe structure, so its storage and storage space is narrow and good.

In addition, since the seedling supply device 4 whose weight changes with the progress of planting work is located in the middle of the front and rear of the traveling unit 1a composed of the front wheels 3 and the rear wheels 2, the traveling stability is good.
In addition, in the said Example, although the operation example transplanted to a cocoon was shown, it is the same also when transplanting a seedling in a flat agricultural field. In addition, examples of vegetable seedlings include leaf vegetable seedlings such as cabbage and Chinese cabbage, root vegetable seedlings such as radish and sweet potato, and fruit vegetable seedlings such as Nanban and Saiban. But it ’s okay.

DESCRIPTION OF SYMBOLS 1a Traveling part 4 Seedling supply device 6 Steering handle 7 Traveling part mission case 9 Engine 30 Planting part mission case 43 Seedling device

Claims (1)

  Planting for mounting the engine (9) on the traveling unit mission case (7) disposed at the rear of the traveling unit (1a) and driving the seedling planting device (5) forward from the traveling unit mission case (7) The seedling supply device (4) is provided, and the seedling supply device (4) is provided on the planting portion mission case (30) over the traveling portion (1a). A seedling collecting device (43) for taking out the seedling and feeding it to the seedling planting device (5) is provided on the front side of the vehicle, and the side portion of the engine (9) is set up from the traveling portion transmission case (7) with the rear side upward. A seedling transplanter provided with a steering handle (6).

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