JP2016010334A - Transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transplanter including a field surface sensor enabling a stable planting by suppressing influence of soil scattered by a planting unit repeating vertical operations.SOLUTION: A transplanter includes: a planting unit for planting vegetable seedling at a ridge by vertical planting operations; and a field surface sensor 401 that detects a height position of a transplanter body by contact members 402 supported at a nearest position of the planting unit to be able to follow the ridge surface, thereby adjusting the planting depth of the planting unit. The contact members 402 are integrally configured in parallel to each other at adjacent intervals apart by a plurality of rod materials 402a extending in the longitudinal direction of the transplanter body. Consequently, even when the contact members 402 receive soil from the planting unit, the soil is discharged to the sides of the plurality of rod materials 402a so as to avoid fluctuation in the detection characteristics.

Description

  The present invention relates to a transplanter for transplanting a seedling with a planting tool that repeatedly moves up and down.

  As shown in Patent Document 1, a transplanter including a planting tool that moves up and down and a farm scene sensor is known. As shown in FIG. 4 of the same document, the farm scene sensor is configured to change the height of the farm scene by pivotally supporting the tip of the contact member formed in a wide warp shape so as to be tiltable about the vehicle width direction axis. The planting height is controlled so that the pivot angle returns to its original position, and the planting height of the planting tool that moves up and down with respect to the upper surface of the cocoon is kept constant. The desired planting depth is maintained.

JP 2009-261278 A

  However, when the planting tool descends and seedlings are planted on the upper surface of the culm, soil in the field may splatter, or soil adhering to the planting tool may scatter when the planting tool rises. In some cases, the accuracy of detecting the change in the height of the field scene may be reduced and the planting depth may be disturbed.

  An object of the present invention is to provide a transplanter including a field scene sensor that enables stable planting by suppressing the influence of soil scattered by a planting tool that repeatedly moves up and down.

  According to the first aspect of the present invention, the height position of the airframe is detected by the planting tool (42) for transplanting the transplant to the field by the up and down planting operation and the contact member supported so as to follow the farm scene (U). In the transplanting machine that includes a farm scene sensor (401) that performs planting while controlling the planting depth of the planting tool (42), the contact member is a plurality of bars extending in the front-rear direction of the machine body (402a) separates adjacent areas and is integrally configured in parallel.

  According to a second aspect of the present invention, in the configuration of the first aspect, a flexible sheet (403) extending from the lower side of the bar (402a) to the lower side of the adjacent bar (402a) is provided. ) Is supported on the front portion of the contact surface member.

  According to a third aspect of the present invention, in the configuration of the first or second aspect, a planting assisting member is attached to a rear end portion of the contact surface member, and the planting assisting member is attached to the planting tool (42). It is characterized by comprising left and right slope shaping plates (421) that exert a pressing force on both side slopes and left and right scrapers (422) that are in contact with both sides of the planting tool (42).

  According to a fourth aspect of the present invention, in the structure according to any one of the first to third aspects, a pivot fulcrum (434) is provided at a front end of the contact member, and the pivot fulcrum (434) The contact surface member is configured to be able to hang down.

  According to a fifth aspect of the present invention, in the structure according to any one of the first to fourth aspects, a blocking member (435) for blocking earth and sand between the contact surface member and the planting tool (42). It is provided.

  The invention according to claim 6 is the structure according to any one of claims 1 to 5, wherein the seedling stock is taken out from the tray transporting device (441) for transporting the seedling tray and the seedling tray to the planting tool (42). A take-out device (442) to be supplied, and the tray transport device (441) includes a supply unit (443) for inclining and descending to the take-out position of the take-out device (442) to transport the seedling tray, and below A discharge portion (444) that bends to the lower surface side and guides the empty tray to be inclined upward, and is retractable above the discharge port (444a) of the discharge portion (444) and at the upper end of the supply portion (443). A supply extension portion (445) is provided, and the supply extension portion (445) is located above the extension of the discharge path of the discharge portion (444) even in the housed state.

  According to the first aspect of the present invention, the planting depth of the planting tool (42) is controlled with high accuracy based on the detected height of the farm scene sensor (401) by the contact member that follows the farm scene (U). At this time, the contact surface member is made up of a plurality of bars (402a) extending in the front-rear direction following the farm scene (U), and the earth and sand scattered from the planting tool (42) is the bar (402a). It is discharged to the farm scenes (U) on both sides without being deposited on the surface, so that the weight change of the contact surface member can be prevented, so that the required detection accuracy can be maintained without causing a change in the detection characteristics of the ridge surface height. Stable transplantation with the planting tool (42) becomes possible.

  According to the invention of claim 2, in addition to the effect of claim 1, the bar material (402a) of the contact surface member is in contact with the field scene (U) via the lower flexible sheet (403), and this flexible Since the sheet (403) extends between the adjacent parts, the bar (402a) is supported on the farm scene (U) without sinking, which causes a change in the detection characteristics of the farm scene (U) height. However, the required detection accuracy is maintained, and the flexible sheet (403) hangs down from the contact surface member by lifting the machine body, and the sediment on the flexible sheet (403) can be discharged.

  According to the invention according to claim 3, in addition to the effect of claim 1 or claim 2, the slope shaping plate (421) acting on the slopes on both sides of the planting tool (42) is collapsed by planting. Scraper (422) scrapes off the adhering earth and sand of the planting tool (42), thereby enabling stable planting.

  According to the invention according to claim 4, in addition to the effect of any one of claims 1 to 3, the contact surface member is rotated to the drooping position by the rotation fulcrum (434) of the front end position by the body lift. The sediment on the contact surface member can be discharged.

  According to the invention according to claim 5, in addition to the effect of any one of claims 1 to 4, the earth and sand scattered around the planting tool (42) by planting reaches the contact member by the blocking member (435). Therefore, the required detection accuracy can be maintained without causing a change in the detection characteristics of the field height by the field scene sensor (401).

  According to the sixth aspect of the present invention, in addition to the effect of any one of the first to fifth aspects, the seedling tray inclines and descends the feeding unit (443) of the tray transfer device (441), and the take-out device (442) becomes the seedling. The seedlings are taken out from the tray and supplied to the planting tool (42), and the empty seedling tray is bent upward from the lower end of the supply unit (443) so as to be discharged from the discharge port (444a). In this case, since the storage-type supply extension portion (445) is provided above the discharge port (444a), even if the supply extension portion (445) is in the storage state, the discharge portion ( Planting traveling is enabled by discharging the empty tray according to 444).

Whole side view of vegetable transplanter Whole plan view of vegetable transplanter Perspective view of the connecting part of the running part and planting part Perspective view of sensor 192 part Side view of 43 parts of take-out device Plan view of 43 parts of take-out device Top view of seedling stage 90 Plane sectional view of seedling tray moving device Action side view sectional view of the seedling stage 90 Action explanation plan view of seedling stage 90 Operational front sectional view of the seedling stage 90 Action explanation perspective view of the regulating means 116 Side sectional view showing the transmission structure of the switching mechanism for the lateral movement Plane cross-sectional development view showing the transmission structure of the mechanism for switching the lateral movement Plan view of lateral movement switching lever 137 Hydraulic circuit diagram Side view of seedling planting device 5 Plan view of seedling planting device 5 Whole side view of vegetable transplanter showing another example (A) Whole side view of vegetable transplanter showing another example, (b) Main part enlarged front view Perspective side view of internal configuration of tray supply device Enlarged side view of the main part of the feeder Enlarged side view of the main part of another configuration of feeder Side view (a) and main part plan view (b) of a farm scene sensor Side view of contact member Plan view (a), side view (b) and rear view (c) of planting auxiliary member Side view (a) of supporting part of contact surface member and side view (b) around planting tool Front view (a) and vertical side view (b) of seedling tank Side view of planting link Side view (a) and main part enlarged plan view (b) of seedling removal device Expansion diagram of push cam transmission system Front view of the front axle with an enlarged sectional view of the main part of the pivot part

  As an embodiment of the present invention, a vegetable transplanter as an example of a transplanter will be described in detail with reference to the drawings. This vegetable transplanting machine 1 has a planting part 1b composed of a feeding device 4, a planting device 5 and the like while a machine is advanced in a state of straddling U by a traveling unit 1a having traveling wheels 2 and 3. The transplanted strain is planted on the upper surface of the ridge U. The worker appropriately steers 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 in the front 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 back surface of the traveling unit mission case 7, and the front end portion of the main frame 14 that connects the traveling unit 1 a and the steering handle 6 to the right rear end of the connecting frame. Are firmly connected. The main frame 14 extends rearward, bends obliquely upward in the middle, and extends as it is to the rear position of the planting portion 1b. And the front-end part of the steering handle 6 is attached to the rear-end part so that rotation adjustment is possible, and the left-right grip 6a of the steering handle 6 can adjust height.

  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. In addition, left and right front wheel support rods 18 are attached to the left and right ends of a front wheel support frame 17 provided on the lower side of the engine 9 so as to be swingable around a pivot shaft 17a in the front-rear direction. Left and right front wheels 3, which are driven traveling wheels, are pivotally supported by the respective parts.

  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 rearward from a hydraulic valve unit 20 disposed on a traveling unit mission case 7, and a balance rod 22 is provided around a vertical axis at the tip of a piston rod of the cylinder. Is pivotally attached to the. The front and rear ends of the piston rod slide along a guide shaft 24 supported by the hydraulic valve unit 20 and an attachment member 23 attached to the main frame 14. 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 length can be changed by extending and contracting the cylinder.

  The elevating cylinder 21 and the rolling cylinder 27 are operated by controlling the hydraulic oil supplied from the hydraulic pump 10 with a control valve (not shown) in the hydraulic valve unit 20. When the elevating cylinder 21 is expanded and contracted, the left and right rear wheels 2 move up and down by the same amount in the same direction, and the aircraft moves up and down. Further, when the rolling cylinder 27 is expanded and contracted, the left and right rear wheels 2 move up and down by the same amount in the opposite direction, and the body tilts left and right.

  The planting part 1 b is fixed to the upper surface of the connecting frame 13 at the lower part of the planting part transmission case 30 that is transmitted from the traveling part mission case 7, and the first planting transmission case is arranged on the upper part of the planting part mission case 30. The base of 31 is fixed, and 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 planting device 5 described later. The first planting transmission case 31 and the second planting transmission case 32 are connected to each other. The planting drive transmission system D1 to the planting device 5 is configured. The post planting tool 42 of the planting device 5 is disposed on the rear side of the traveling unit 1a. In addition, a preliminary mounting table 36 on which a growing tray is placed is attached to a frame 34 whose base is fixed to the upper part of the planting unit mission case 30.

  As shown in FIG. 3, the input shaft 30a of the planting part mission case 30 protrudes forward from the lower end of the case, and by inserting it into the PTO extraction part 7a of the traveling part mission case 7, the PTO It is connected to a shaft on the traveling part side in the take-out part. The planting part mission case 30 is detachably attached to the connecting frame 13 with bolts 35. Therefore, by removing the bolts 35 and removing the input shaft 31a from the PTO extraction portion 7a, the planting portion 1b can be detached from the traveling portion 1a, and the planting portion 1b can be easily maintained.

  In the side view, the planting part mission case 30 is provided rearward and upward from the connection frame 13, and the first planting transmission case 31 is provided rearward and downward from the upper end part of the planting part mission case 30, and the second planting The auxiliary 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 second planting transmission case 32 is ensured without making the longitudinal length of the airframe longer than necessary.

  The supply device 4 is arranged on the upper rear side of the main frame 14 and is inclined so that the rear side becomes higher in a tray T containing a plurality of transplanted strains S such as soil block seedlings in the vertical and horizontal directions. The tray supply device 40 that is intermittently moved in the vertical and horizontal directions and is placed on the front side of the tray supply device 40, and the grafts are taken out from the tray T one by one by the extraction claw 41. It is comprised from the taking-out apparatus 43 conveyed to the planting tool 42. FIG.

  The tray T is formed of a thin plastic and has flexibility, and has a large number of pot parts 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 seedlings S, such as a soil block seedling, are nurtured by sowing and raising seedlings in the floor soil filled in the pot part P.

  The take-out device 43 includes the take-out claw 41 and a claw drive mechanism 44 that drives the take-out claw 41. The take-out claw 41 is composed of a bar having a pair of left and right tips, and is provided so as to be closer to each other on the tip side. The claw driving mechanism 44 drives the extraction claw 41 to reciprocate between the tray T and the planting tool 42 while changing the posture of the extraction claw 41. A claw support 45 to which the pair of extraction claw 41 is attached, A claw guide body 46 that guides the advancement and retraction of the take-out claw 41, and a support 47 that supports the claw support body 45 and the claw guide body 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. The passive sprocket 53 provided at the right end of the input shaft 51, the drive sprocket 55 of the drive shaft 54 of the planting part mission case 30, and the drive chain 56 provided between the sprockets 53 and 55 are connected to the take-out device 43. A transplant take-out drive transmission system D2 is configured. The output shaft 52 is linked to the input shaft 51 via a gear transmission mechanism, and the tray supply 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 portion of the swing arm 60 is pivotally connected to the lower left 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 claw support 45 can be moved toward and away from the tray T. In addition, the pair of extraction claws 41 that are pierced from the oblique direction into the block soil of the transplant 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 can be swung around the pin 68. The guide plate 69 is urged in a direction in which the 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 extraction claws 41 are pivotally supported by the claw attachments 75 via shafts 76, respectively, and the pair of extraction claws 41 can swing so that the distal ends thereof move relative to the claw attachments 75. It has become.

  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 inserted into the claw support body 45, the base body 73 and the claw attachment 75 so as to be slidable in the longitudinal direction. The claw guide body 46 is formed of a round bar or the like and is taken out at the front end thereof. A guide portion 82 having a guide hole for inserting and guiding the claw 41 is provided, an L-shaped operation member 83 is attached to the rear end, and a stopper 84 is fixed to the middle portion. A coil spring 85 is fitted between the coil springs 85 and 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 along with the roller 63 fitted to the crank pin 58 to push the cam plate 81 and push the link. 77 is swung to the tray T side, whereby the claw mounting tool 75 and the claw support body 45 are pushed toward the tray T side with respect to the support tool 47 as shown in FIG. , 85 are compressed. Thereby, the extraction nail | claw 41 protrudes and stabs the block soil of the transplant S, and the restoring force for the nail | claw support body 45 to retreat is held.

  When the extraction claw 41 protrudes and pierces the block soil of the transplant S, the extraction claw 41 is regulated by the guide hole of the guide portion 82, and the distance between the tips of the left and right extraction claws 41 is reduced. The take-out pawl 41 is configured to be pierced into the block soil. 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 tray T around the swing shaft 61. By swinging in the direction, the take-out claw 41 moves backward with respect to the tray T together with the claw support 45, the claw guide 46 and the support 47, and the block soil of the transplant S is taken out from the pot portion P.

  Thereafter, when the input shaft 51 further rotates counterclockwise, the take-out claw 41 moves in a direction away from the tray T together with the claw support body 45, the claw guide body 46 and the support tool 47, and the roller 67 moves in the cam groove 70. The front raised portion is slid so that the take-out claw 41 and the like are changed to a substantially downward posture so that the transplant S is in a downward posture and the transplant S is positioned above the front portion of the planting tool 42.

  Then, when the take-out 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 locking 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 extraction claw 41. The transplant S is removed from the take-out claw 41 by being pushed out and dropped into the 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 tray supply device 40 includes a mounting table 90 on which the tray T is mounted. The mounting table 90 is supported by a pair of upper and lower guide rails 91a and 91b arranged in the left-right direction so as to be movable in the left-right direction. . 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 mounting table 90 has a mounting plate 96 that supports the bottom of the tray T across the horizontal row of pot portions P (therefore, a mounting surface on which the upper surface of the mounting plate 96 mounts and supports the tray T). 96a), the mounting plate 96 is disposed between a pair of side plates 97 opposed to each other in the left-right direction, and the left and right ends of the mounting plate 96 are opposed surfaces of the left and right side plates 97 (inner surfaces in the left-right direction). ).

  In the upper part between the left and right plates 97, a vertical movement shaft 99 is provided in the left-right direction, and a feed rod described later that engages with a gap between the pot portions P in the vertical direction (vertical direction) of the tray T. A feeder 215 with 221 is attached. Therefore, the tray T is pushed by the feed rod 221 and can be moved vertically. The left and right side plates 97 are connected by other connecting members in addition to the longitudinal movement shaft 99.

  The tray supply device 40 has the same vertical and horizontal dimensions of the tray T and the size of the opening of the pot portion P, but the interval between the openings of the pot portion P is substantially the same (that is, the pot portion in the vertical and horizontal arrangement direction). Two types of trays T (with different pitches between the centers of P and the number of pot portions P) are mounted (described later).

  At the upper end portion of the mounting plate 96 of the mounting base 90, an extended mounting portion 300 made of a flat plate formed of a resin material in a slat-like shape is rotatably provided. That is, the base portion of the extended mounting portion 300 is rotatably mounted on the rotation fulcrum shaft 301 provided at the upper end portion of the mounting plate 96, and the mounting surface 96 a on which the tray T of the mounting plate 96 is mounted. The posture can be freely changed between an inclined state Z1 located on the extended line and a forward inclined state Z2 bent forward from the extended line of the mounting surface 96a. Then, an arm 302 provided integrally with the extension mounting portion 300 and a planting lift lever 203 described later (to perform on / off operation of a planting clutch transmitted to the supply device 4 and the planting device 5 and to lift and lower the machine body). Are connected by the operation wire 303, and when the planting clutch is turned off or the machine body is raised by the planting lift lever 203 for turning the machine body, the extended mounting part 300 is placed via the operation wire 303. It is linked so that the posture is changed from the inclined state Z1 positioned on the extended line of the mounting surface 96a of 96 to the forward inclined state Z2 bent forward from the extended line of the mounting surface 96a.

  Reference numerals 304 denote left and right tray holders respectively provided on the left and right sides of the upper end portion of the mounting plate 96 of the mounting table 90, and each of the upper and lower positions of the mounting plate 96 extends upward and bends inward. It is configured to be able to support the upper side surface of the tray T where there are no transplants on the left and right sides of the tray T. That is, when the posture of the extended mounting portion 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 receiving tool 304 supports the left and right side portions of the tray T to prevent the transplanted strain from being damaged due to the tray T falling forward or being bent.

  Reference numeral 305 denotes an adjustment bolt that regulates the angle of the forward mounting portion 300 in the forward inclined state, and the extension mounting portion 300 is configured such that the tip of the adjustment bolt 305 contacts an arm 302 provided integrally with the extension mounting portion 300. The angle of the forward inclined state Z2 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 more quickly when the posture of the extension platform 300 is changed to the forward inclined state Z2, and the angle of the forward inclined state is increased. Becomes smaller. In the case of the tray T formed of a soft material, if the angle of the forward inclined state of the extension mounting portion 300 is increased, the tray T bends forward and damages the transplant. The angle of the forward inclined state of the part 300 is reduced.

  As described above, when the planting clutch is disengaged or the aircraft is lifted by the planting lift lever 203 during the turning of the machine body, the extended mounting part 300 is attached to the mounting surface 96a of the mounting plate 96 via the operation wire 303. Since the posture is changed from the tilted state Z1 located on the extended line to the forward tilted 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 mounting portion 300 extending toward the worker who automatically performs the posture change automatically toward the front, the operator can perform a turning operation with good workability without the extension mounting portion 300 being in the way.

  In the above-described embodiment, when the planting clutch is disengaged or the machine is lifted by the planting lift lever 203, the extension mounting portion 300 is extended through the operation wire 303 to extend the mounting surface 96a of the mounting plate 96. An example is shown in which the posture is changed from the inclined state Z1 positioned on the line to the forward inclined state Z2 bent forward from the extended line of the mounting surface 96a, but a strain sensor is provided at the base of the steering handle 6, When the operator turns the aircraft by holding the left and right grips 6a of the control handle 6 and pushing down the rear of the aircraft, the distortion sensor detects the distortion by pushing down the rear of the aircraft and turning the aircraft. Based on the detection, the extended mounting portion 300 is bent forward from the extended line of the mounting surface 96a from the inclined state Z1 positioned on the extended line of the mounting surface 96a of the mounting plate 96 by the electric motor. The inclined state Z2 may be configured to attitude change.

  Here, the lateral movement mechanism of the tray T will be described. The left and right side plates 97 are inserted between the left and right bearing members 104 which are arranged on the left and right sides of the mounting base 90 and are attached to and supported by the left and right saddle frames 95 and at the same pitch. A lateral movement shaft 105 formed with a special screw (Napya screw) that joins the valleys of the cut left and right screws is supported so as to be rotatable about the left and right axis. The lateral movement shaft 105 is associated with the special screw on the axis. A mating slider 106 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 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 it is driven to rotate, the slider 106 intermittently moves in the left-right direction and is turned back at the end of the screw formed on the horizontal movement shaft 105, so that the mounting table 90 is reciprocated in the left-right direction. A mounting drive system D3 is configured by the winding transmission mechanism 108a in the transmission case 108.

  The lateral movement shaft 105 is stopped when the transplant S is taken out from the pot part P by the take-out claw 41, and rotates after the transplant S is taken out from the pot part P. The stage 90 is configured to rotate intermittently so as to move the mounting 90 by one pitch in the horizontal arrangement direction (left-right direction). Note 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 types of trays T that are selectively used can be selected.

  Next, the vertical movement mechanism of the tray T will be described. The left and right arms 111 and 111 are provided on the vertical movement operating shaft 110 that rotates together with the horizontal movement shaft 105, and a pair of left and right is provided at the tip so as to be able to act on a feeder 215 described later. Checking rollers 216 and 216 are provided.

  When the mounting table 90 moves to the left and right end portions, the corresponding check rollers 216 and 216 of the vertical movement operating shaft 110 act on the feeder 215, whereby the tray T is placed in the vertical arrangement direction of the pot portions P. Only one pitch of the pot part P is transferred in the (perpendicular direction orthogonal to the left-right direction).

  As a result, when the removal of the transplant S of the soil block from the horizontal row of pot portions P is completed, the tray T is moved vertically by an amount corresponding to the vertical interval of the pot portions P. The portion of the tray T after the transplant S has been taken out is folded back to the lower surface side of the mounting plate 96, and as shown in FIGS. Guide members 114 that are formed in an arc shape and guide the tray T are fixedly attached to the left and right ends and the center.

  Reference numeral 310 denotes an electric motor that drives and rotates the lateral movement shaft 105 to move the platform 90 left and right. When the supply switch 311 is pressed on the operation panel 202, the electrical motor 310 is actuated to drive and rotate the lateral movement shaft 105. Toward the left and right side ends (for example, the steering handle 6 offset from the left and right center of the aircraft and the position opposite to the left and right sides of the aircraft), the platform 90 is moved to the left and right by the platform moving end detection sensor 312 provided on the guide rail 91a. Move until it is detected that it has moved to one end.

  Therefore, when the transfer operation is started by placing the tray T on the mounting table 90 and pressing the supply switch 311, the mounting table 90 moves to the left and right side ends (for example, the steering handle 6 offset from the left and right center of the body and the left and right sides of the body). To the opposite position in the direction) and stop, so that at the beginning of the transplantation work, the extraction device 43 can always take out the transplant from the transplant at the end of the tray T, without wasting the transplant, and Therefore, transplantation can be performed with good workability.

  In addition, when the aircraft is turning (when the planting clutch is disengaged or the aircraft is raised using the planting lift lever 203), the electric motor 310 is operated to control the steering handle 6 and the aircraft that are offset from the left and right center of the aircraft. When it is moved to the opposite end position in the left-right direction and the turning is completed (when the planting clutch is engaged or the aircraft is lowered by the planting lift lever 203), the electric motor 310 is reversely operated. When the platform 90 is returned to the original position, the extension extending toward the operator who performs the turning operation of the aircraft by grasping the left and right grips 6a of the steering handle 6 and pushing down the rear of the aircraft when the aircraft is turning. Since the platform 300 moves to the opposite side of the aircraft in the left-right direction with respect to the steering handle 6, the platform 90 disappears in front of the steering handle 6, and the operator works without the extension platform 300 being in the way. Well turning work can be performed.

  Furthermore, when the structure is such that the electric motor 310 is operated to move the platform 90 to the higher side of the farm scene detected by the pendulum 200 for detecting the horizontal inclination of the aircraft when turning on an inclined ground, the aircraft can turn with a good balance. It can be done and the turning work can be done easily.

  On the left and right guide members 114, holding members 115 that hold down the left and right edge sides of the upper surface of the tray T to prevent the bottom of the pot portion P of the tray T from moving (raising) away from the placement plate 96. Is provided. The holding member 115 is formed by bending an elastically deformable steel bar, the base side 115a is attached and fixed to the guide member 114, and the midway part comes into contact with the upper surface of the tray T and presses it. The tip side is configured to be separated from the tray T.

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

  The attachment portion 116b is rotatably attached to the side plate 97 by a bolt 93, and a restricting posture for restricting the movement of the pressing portion 116a away from the mounting surface 96a of the tray T (see FIGS. 9 to 12). (Indicated by a solid line), the tray T is moved vertically on the mounting plate 96 by gripping the knob portion 116c and pulling up the pressing portion 116a and turning the regulating means 116 outward in the left-right direction around the attachment portion 116b. The restricting means 116 can be freely changed to a retracted posture (indicated by a phantom line in FIG. 12) that can be placed from the position.

  The mounting plate 96 of the above-described table 90 is provided with a detecting means 117 for detecting the passage of the tray T located near 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 tray T, a biasing member 119 that biases the contact member 118 toward the pot portion P, and a microswitch. It is comprised from contact sensors 120, such as.

  The contact member 118 is supported by a support member 121 whose rear side in the tray vertical movement direction 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 on the mounting plate 96, the mounting plate 96 can protrude to the mounting surface 96 a side so as to be freely retractable. Further, a stopper 124 is fixed to the contact member 118 so as to contact the lower surface of the mounting plate 96 and restrict the rotation of the contact member 118 in the protruding direction (the direction protruding from the opening 123 toward the tray T). Has been provided.

  The urging member 119 is formed of a spring plate or the like, the rear side in the tray vertical movement direction is fixed to the support member 121, and the front side in the tray vertical movement direction is in contact with the lower surface of the contact member 118, and its elastic force Thus, the contact member 118 is urged in the protruding direction. 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.

  Therefore, 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 tray T passes 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 member 119, and the presence of the tray T is detected. Then, as shown by the solid line in FIG. 9, when the 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 on the mounting surface by the urging member 119. While projecting to the 96a side, the pressing of the contact 120a of the contact sensor 120 is released, and it is detected that the tray T is separated from the detecting means 117, that is, the passage of the tray T.

  When the detection means 117 detects the passage of the tray T, the detection means is operated to notify the operator that the tray T has to be replenished by operating a notifying means including a buzzer and a lamp. In the example shown in FIG. 9 (FIG. 9), the detection means 117 detects the passage of the tray T when the second pot part P from the rear in the longitudinal arrangement direction of the pot parts P comes to the take-out position by the take-out claw 41. Although the tray T is replenished, the passage of the 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 tray T has passed the detecting means 117 by the operation of the notifying means 117, the right and left regulating means 116 is changed to the retracted position, and the tray T is placed and replenished on the placing plate 96. Thereafter, 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, malfunction of the detection unit 117 due to the floating of the tray T can be prevented. Therefore, the detection unit 117 may be provided anywhere as long as the lifting of the tray T can be regulated by the regulation unit 116.

  Note that the regulating means 116 may regulate the lifting of the tray T by simply contacting the tray T without pressing the left and right side edges of the upper surface of the tray T. You may make it contact the wall (part which connects the opening edge of the pot part P) lower surface. Further, as the detection 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 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 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 types of trays T having different pitches, the lateral movement amount of the tray T can be switched in 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. Further, a torsion coil spring 149 is externally fitted between the lateral movement switching lever 137 of the collar 143, the interlocking plate 141 and the contact plate 145, and these springs 149 are twisted in opposite directions. At the same time, one end of the 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.

  Therefore, 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 spring 149, the rotation shaft 139 is rotated, and the shifter 132 is moved to the intermediate shaft 126. By moving the lateral movement switching lever 137 from the position indicated by the solid line to the position indicated by the phantom line or from the position indicated by the phantom line to the position indicated by the solid line in FIG. The horizontal movement amount of the tray T is switched.

  When the lateral movement amount of the tray T is switched, if the first engagement teeth 134 do not mesh with the first meshing teeth 133 or the second engagement teeth 136 do not mesh with the second meshing teeth 135, one spring 149 Even if the rotation shaft 139 and the interlocking lever 125 do not rotate, the rotation operation of the lateral movement switching lever 137 is allowed, and in this state, the first or second meshing is performed. When the teeth 133 and 135 are engaged with the first or second engaging teeth 134 and 136, the rotating shaft 139, the interlocking lever 125, and the like are rotated by the biasing force of the twisted spring 149, and the tray Switching of the lateral movement amount of T is completed.

  Therefore, when the lateral movement amount of the tray T is switched, the first or second engagement teeth 134, 136 and the first or second engagement teeth 133, 135 are used to operate the lateral movement switching lever 137. There is no need to synchronize the timing of each part so as to engage with each other. 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 is suitable, and the tray T is laterally moved. The amount can be easily switched.

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. By engaging the knob bolt 151 with 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.
The planting device 5 includes a cup-shaped planting tool 42 with a sharp lower end. The planting tool 42 includes a front member 42a and a rear member 42b. The left and right front member mounting arms 162A are rotatably supported by a front member rotating shaft 161A located behind the planting tool 42. The rear member 42a is integrally attached to the left and right rear member attachment arms 162B rotatably supported by the rear member rotation shaft 161B located in front of the planting tool 42. It has been. Therefore, when both members 42a and 42b rotate with the rotation shafts 161A and 161B as fulcrums, the lower portion of the 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 urges the front member 42a and the rear member 42b to close is stretched. The 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 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 is engaged with the roller 174 in a stroke in which the 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 planting tool 42 is opened. When the opening / closing cam 173 does not engage with the roller 174, the planting tool 42 is closed by the tension of the spring 164.

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

  In order to maintain the planting performance of the planting tool 42, the outer peripheral surface and inner peripheral surface of the planting tool 42 are made of rubber material or the like in the process in which the planting tool 42 is planted and raised in the field. The structure which makes the scraper which contacts and slides and removes the earth and sand adhering to the planting tool 42 is known. The scraper that is slidably in contact with the inner peripheral surface of the planting tool 42 enters the planting tool 42 when the planting tool 42 is opened and raised. Although it is the structure which drops the earth and sand of a surrounding surface, if the structure which closes the planting tool 42 a little immediately after a scraper enters in the planting tool 42, the resistance which carries out sliding contact with the planting tool 42 inner peripheral surface of a scraper will become large. We can drop earth and sand well.

  Reference numeral 177 denotes a cylindrical fixed guide which is fixed to the front side of the lower guide rail 91b in a posture inclined forward by a fixed arm 178, and the extraction claw 41 is extracted from the tray T and transplants the transplant S It is provided to guide the transplant S to the guide 176 of the planting tool 42 when dropping into the tool 42 from above. The posture inclined before the fixed guide 177 is inclined in the same direction as the direction in which the nail guide body 46 projects and pushes and removes the transplant S from the extraction claw 41, and the planting tool 42 below the extraction claw 41. The transplant can be securely dropped from above, and the posture of the transplant S which has been pushed out from the take-out claw 41 and released is also stabilized by the fixed guide 177 in the previously inclined posture. It is dropped into 42 and the planting posture of the transplant is very good. Further, since the fixed guide 177 is fixed to the lower guide rail 91b that supports the mounting table 90 so as to be movable left and right, the positional relationship between the tray T on the mounting table 90 and the fixed guide 177 is always constant, and the take-out The nail | claw 41 takes out from the tray T, and the transplanted strain S is reliably dropped into the fixed guide 177 and the planting posture of the transplanted strain is stabilized.

  A pair of left and right pressure-reducing wheels 180 are disposed behind the planting position. The left and right pressure-reducing wheels 180 are rotatably mounted in the middle of a swing frame 187 that is swingably supported by a support frame 186 fixed to the front and rear intermediate portion of the main frame 14. A rod 188 extends upward from the center of the left and right of the rear end portion of the swing frame 187, and the upper end portion of the rod 188 has a base portion fixed to the rear end portion of the main frame 14. The support arm 189 is supported through the through hole 189a. The rod 188 is provided with a weight 190 penetrating through the rod 188. By adjusting the number of the weights 190, the pressure reducing load of the left and right pressure reducing wheels 180 can be adjusted. Reference numeral 191 denotes a hairpin that prevents the rod 188 from coming out of the through hole 189a of the support arm 189.

  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 progresses, and removes the soil around the transplant hole after the transplant strain has been planted. It collapses to refill the hole and lightly crushes the trace. Reference numeral 192 denotes a sensor for detecting the upper surface of the eaves. When the sensor 192 rotates up and down, the link mechanism 193 transmits the rotation to the up and down control valve 20a, and the angle of the sensor 192 returns to the original direction. Is activated. As a result, 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 transplanted strain is controlled to be constant regardless of changes in the height of the cocoon. The growth of transplanted plants after planting is good.

  The sensor 192 is pivotally supported by a shaft 196 on an arm 195 whose rear end is fixed to a pivot shaft 194 pivotally supported on the left side of the main frame 14 and whose front end extends forward. Has been. The rotation shaft 194 is connected to the base of the planting depth adjustment lever 197. When the planting depth adjustment lever 197 is engaged and locked with the adjustment engagement portion of the engagement guide 198, the rotation shaft 194 is fixed. The rotation of the rotation shaft 194 is fixed, so that the vertical height of the shaft 196 of the arm 195 is fixed. Therefore, the sensor 192 rotates around the shaft 196 while sliding on the top surface of the arm 195, Thus, the planting depth of the transplanted strain is always controlled to be constant regardless of the height change of the ridge. Then, by adjusting the position of the planting depth adjustment lever 197 with respect to the adjustment engagement portion of the engagement guide 198 and engaging and locking it, the vertical height position of the shaft 196 of the arm 195 is set. Since it can be adjusted, the planting depth of the transplant can be adjusted because the reference position for controlling the height of the aircraft relative to the heel can be freely set.

  The right / left tilt control valve 20b in the hydraulic valve unit 20 is switched in conjunction with the movement of the left / right tilt detection pendulum 200. When the fuselage is tilted to the left and right, the rolling cylinder 27 is actuated appropriately to Control to return to 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 a planting clutch that engages and disengages the planting clutch that is transmitted to the supply device 4 and the planting device 5 and planting is operated on the operation panel 202. A lift lever 203, a main clutch lever 204 for turning on and off the main clutch, and the like are provided. Reference numeral 205 in the figure denotes an inter-strain adjustment lever that adjusts the planting interval of the transplant.

  The operation | work which transplants a vegetable transplant strain | stump | stock to a farm field by said vegetable transplanter 1 is demonstrated. First, a tray T on which a vegetable transplant is grown is loaded on the mounting table 90. 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 to turn on 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 extraction claw 41 takes out the transplanted strains one by one from the tray T of the mounting table 90 that reciprocates left and right, and drops it into the planting tool 42. Then, after the planting tool 42 has planted the transplant on the heel, the pair of left and right pressure wheels 180 gently press the left and right sides of the transplant.

  In particular, the planting device 5 for reciprocating in the vertical direction to plant the transplant in the field and the take-out device 43 for taking out the transplant from the mounting table 90 and transferring it to the planting device 5 located below are equipped. In the transplanter, the planting drive transmission system D1 to the planting device 5 is arranged on the left side of the aircraft, and the extraction drive transmission system D2 to the extraction device 43 is arranged on the right side of the aircraft. The planting drive transmission system D1 and the take-out drive transmission system D2 are arranged separately on the left and right sides of the aircraft, and the drive transmission system of the planting device 5 and the take-out device 43 has a rational and simple configuration, and is small and compact. Therefore, the operation and operability of the machine (handleability of the machine body) is very good, and the transplantation work of a good and efficient transplant can be performed. Moreover, since it is a small body structure, its storage place is also narrow and excellent.

  In a side view, the planting part mission case 30 is provided rearward and upward from the connection frame 13, and the first planting transmission case 31 is provided rearward and downward from the upper end part of the planting part mission case 30, and Since the two planting transmission cases 32 are provided in the horizontal direction from the lower end portion of the first planting transmission case 31, the lower side of the second planting transmission case 32 is provided without making the longitudinal length of the airframe longer than necessary. In addition, a space for moving the balance rod 22 can be secured, and the structure has a very compact and concise configuration in which the longitudinal length of the machine body is shortened.

  Further, the first planting transmission case 31 and the second planting transmission case 32 arranged in the longitudinal direction on the left side of the planting unit mission case 30 constitute a planting drive transmission system D1 to the planting device 5. In addition, since the transmission part for transmitting power to the transmission case 50 of the take-out device 43 is arranged on the right side of the planting part mission case 30, the take-out drive transmission system D2 to the take-out device 43 is configured. The drive transmission structure between the planting device 5 and the take-out device 43 can be simply configured from the case 30 using the planting unit mission case 30 as a base.

  Further, the take-out drive transmission system D2 to the take-out device 43 for taking out the transplant from the mount 90 is arranged on the right side of the machine body, and a stand drive system D3 that moves the mount 90 left and right from the take-out drive transmission system D2 is provided. Since the platform drive system D3 is taken out and the transplanter is arranged on the same right side as the drive drive system D2, the drive drive system of the associated take-out device 43 and the drive drive system that moves the platform 90 left and right are arranged in series. Thus, the drive transmission between the take-out device 43 and the mounting table 90 is simple and stable, and the take-out device 43 can reliably take out the transplant from the mount 90, so that the transplanting performance of the transplant is good.

  FIG. 19 shows another example, in which a slider 321 is externally fitted to a lateral movement shaft 320 having a configuration similar to that of the lateral movement mechanism of the tray T below the tray return path R of the mounting table 90, and a balance weight is attached to the slider 321. 322 is attached, and the balance weight 322 is configured to move left and right so as to be opposite to the horizontal movement direction of the mounting table 90. That is, the balance weight 322 is at the left end when the platform 90 comes to the right end, and the balance weight 322 moves to the right end when the platform 90 comes to the left end. The change in the center of gravity is corrected by the balance weight 322, and the running performance of the aircraft is improved, so that the transplanting operation can be performed properly. A chain transmission mechanism 323 transmits rotational power from the lateral movement shaft 105 to the lateral movement shaft 320.

  In addition, taking the drive from the horizontal movement shaft 105 of the horizontal movement mechanism of the tray T of the table 90 described above, the preliminary mounting table 36 is reciprocated in the left-right direction of the machine body with the same configuration as the horizontal movement mechanism of the tray T of the mounting table 90. If the horizontal movement of the stage 90 is opposite to the horizontal movement direction of the stage 90, the change in the horizontal center of gravity of the airframe due to the horizontal movement of the stage 90 is caused. It can be corrected by moving to improve the running performance of the aircraft and perform the transplantation work properly.

  FIG. 20 shows another example, in which the preliminary mounting table 36 automatically moves in the high direction of the inclined land during the transplanting operation on the inclined land, corrects the left / right balance of the aircraft, and can exhibit proper traveling performance on the inclined land. It was designed to allow good transplantation work. That is, the preliminary stage 36 is fixedly provided on a support arm 331 supported so as to be rotatable around a support shaft 330 provided in the longitudinal direction of the machine body, and the lower end portion of the support arm 331 and the rolling movement of the rolling cylinder 27 are provided. Are linked by an operation wire 332. Accordingly, when the left side of the fuselage is on the lower side of the slope, the rolling cylinder 27 is contracted and the left rear wheel 2 is moved downward, so that the operation wire 332 is preliminarily mounted by the contraction of the rolling cylinder 27. The platform 36 moves to the higher side of the slope on the right side of the aircraft. On the other hand, when the left side of the machine body is on a high slope side, the rolling cylinder 27 is extended and the left rear wheel 2 is moved upward, so that the operation wire 332 is reserved by the extension of the rolling cylinder 27. The platform 36 moves to the higher side of the slope on the left side of the aircraft.

  In the above-described embodiment, an example of the operation of transplanting to a cocoon has been shown. 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 and vegetable transplants such as Nanban and Saiban. It can be a seedling.

(Tray supply device)
Next, the tray supply device will be described. As shown in FIG. 21, a perspective side view of the internal configuration of the tray supply device 40 includes a mounting plate 96 for placing and guiding the tray T integrally formed with a group of aligned pots, and the mounting plate. An outer guide 213 for bending the tray T received from 96 downward and guiding it to the lower side of the mounting plate 96; a tray receiver 214 for accommodating the tray T discharged from the outer guide 213; and an outer guide A feeding tool 215 that feeds and moves the tray T by a predetermined distance from the back surface side along the rear surface 213, and a check roller 216 that can rotate around the feeding tool 215.

  The check roller 216 is configured such that the tray supply device 40 supported by the lateral movement shaft 105 so as to be movable in the left-right direction can act on the feeder 215 at a position where the tray supply device 40 reaches the left-right side end position. In this case, by arranging the lateral movement shaft 105 at a low position in the dead space formed in the inner peripheral portion for the bending feed of the tray T, it is possible to reduce the size without causing interference with the feeding tool 215. A low center of gravity can be achieved.

(Feeder)
The feed tool 215 has a feed rod 221 that can be engaged with a groove D between the pots on the back side of the tray T, and supports the feed rod 221 in a swingable manner, as shown in FIG. A feed arm 222 and a relay link 223 connected to the feed rod 221 are provided.

  The feed rod 221 is bent in a U-shape, and has an entry portion 221a extending in a straight line that can enter the groove portion D between the pots on the back surface side of the tray T at the distal end portion. A shaft 221b is provided to pivotally support the distal end portion of the feed arm 222, and a proximal end arm 221c is provided so as to be swingably connected to the relay link 223, whereby an entry portion 221a with respect to the inter-pot groove D of the tray T is provided. Is configured to be able to advance and retreat. The support shaft 221b is provided with a torque spring 224 as an urging tool for entry, and the entry portion 221a is urged in the direction of entering the inter-pot groove D of the tray T without crushing the tray. Further, if necessary, a lever 225 for forcibly retracting the entry portion 221a from the inter-pot groove portion D is provided on the feed rod 221. The entry portion 221a is provided across the left and right width of the tray T.

  The feed arm 222 is provided with a support shaft 222a at the base end portion, and is pivotally supported within the feed operation range of the feed rod 221 at the distal end portion. In addition, the feed arm 221 is a stepping control cam that performs a backward operation from the feed position. 222b is provided. This step control cam 222b is formed so that the feed rod 221 can go backward in the range exceeding the length of the pot portion P of the tray T under the action of the check roller 216. In addition, a spring 226 is provided on the feed arm 222 as a feed urging tool to urge the feed rod 221 in the feed direction, and the feed position of the pot portion P0 immediately above the entry portion 221a is adjusted to the take-out position. A stopper 227 for setting the limit position of the feeding operation is provided.

  The relay link 223 is swingably connected to the proximal end arm 221c of the feed rod 221 by a long hole connecting portion 223a formed at the distal end, and the proximal end is pivotally supported on the support shaft 222a of the feed arm 222. In addition, an engagement control cam 223c that controls the swing of the feed rod 221 to retract the entry portion 221a from the tray T is provided. The engagement control cam 223c is formed such that the entry portion 221a can be retracted from the inter-pot groove portion D according to the action of the check roller 216.

  The reciprocal relationship between the step control cam 222b of the feed arm 222 and the engagement control cam 223b of the relay link 223 is determined by the engagement control cam 223b via the relay link 223 so that the entry portion 221a is straightly removed from the inter-pot groove D. While the retracting portion 221a of the feed rod 221 is retracted from the inter-pot groove portion D, the feed arm 222 is slightly moved backward by the step control cam 222b, and further, the approach portion 221a is moved to the adjacent pot portion P1. Thus, the outer shapes of both cams are configured so that the check roller 216 acts.

(Operation)
The operation of the tray supply device 40 having the above configuration will be described. The tray supply device 40 is configured such that the check roller 216 acts in common on the step control cam 222b of the feed arm 222 and the engagement control cam 223b of the relay link 223. While the engagement control cam 223b retreats the entry portion 221a of the feed rod 221 via the relay link 223 from the pot-to-pot groove D immediately below the pot portion P0 at the take-out position, the feed control 222 is slightly moved by the step control cam 222b. The entry portion 221a goes straight out from the groove portion D between the pots, and the entry portion 221a moves to the adjacent pot portion P1 by the return operation of the feed arm 222 following this.

  When the check roller 216 further rotates and the engagement control cam 223b and the step control cam 222b are released, the entry portion 221a of the feed rod 221 is adjacent to the pot portion from the back side of the tray T by the biasing force of the torque spring 224. Next, when the feed arm 222 is swung to the restriction position of the stopper 227 by the urging force of the spring 226, the adjacent pot portion P1 is pushed by entering the inter-pot groove portion D immediately below the adjacent pot portion P1. Is positioned at the take-out position, whereby the tray T is fed and moved by a distance corresponding to one pitch.

  When the tray T is fed and moved, the take-out device 43 is activated to take out the transplant. This removal operation avoids the main axis of the transplanted strain from the surface side of the tray T and acts on the extraction claw 41 at the lower half position of the pot portion P. By positioning with the entry portion 221a, the operation point of the extraction claw 41 can be aligned with high accuracy. Further, by operating the take-out device 43 with the entry portion 221a engaged with the groove portion D between the pots, the tray T is restrained by the entry portion 221a. The stock can be taken out.

  With respect to the operation timing of the take-out device 43, the rotational speed of the check roller 216 is set to be 1/2 or less of the operation speed of the take-out device 43, so that the feeding operation time of the tray T is less than 180 degrees and Since it is shorter than the take-out cycle, even if there is an error in the timing at which the check roller 216 acts on the feeder 215 at the left and right end positions where the lateral movement speed by the horizontal movement shaft 105 is reduced, the take-out operation from the tray T is performed. By the time the tray T can be reliably fed, the take-out device 43 passes the transplant to the planting device 5 so that the transplant is planted in the field.

  Thus, the tray supply device 40 includes the feeding tool 215 that engages with the groove portion D between the pots formed on the back side of the tray T and feeds it to a predetermined position. The transplanted strains are sequentially taken out from the device 40 and transferred to the planting device 5 to plant the transplanted strain. At this time, the feeder 215 of the tray supply device 40 is engaged with the groove D between the pots on the back surface of the tray T. Therefore, the feeding accuracy is ensured by tray feeding in a pot unit, and the transplanted strain can be reliably taken out and delivered to the planting device 5 by the take-out device 43 in a fixed arrangement.

  Therefore, by configuring the feeding tool 215 in the dead space required for the bending feed of the tray T, it is possible to achieve compactness and feeding accuracy without requiring a large width dimension as in the case of the chain feed mechanism extending outside the tray T. An excellent tray supply device can be configured.

  The feeding tool 215 includes a feeding rod 221 that engages with the groove portion D between the pots and a feeding arm 222 thereof, and also includes a simple swing control mechanism provided with respective swing control cams. As a result, the feed rod 221 can be engaged with the pot-to-pot groove portion D, and the feed arm 222 can feed and control the tray T via the feed rod 221, so that the tray T can be controlled in units of pots. High-precision feeding is possible, and then the feed rod 221 and the feed arm 222 are returned to enable the next pot portion P to be repeatedly fed to the last pot portion P of the tray T in the same manner.

  In this case, the feed rod 221 is provided with a biasing tool 224 that biases toward the side of entering the inter-pot groove D, so that the feed rod 221 is moved by the biasing tool 224 by the biasing tool 224 except during the check. Since it is entered and held in D, the engagement state necessary for the movement of the tray T can be ensured by a simple cam configuration.

  Further, since the take-out device 43 takes out the pot portion P0 immediately above the feed tool 215 is engaged, the pot portion P0 to be taken out is restrained by the engagement of the feed tool 215. Since the take-out operation by the take-out device 43 is performed in this state, the positional deviation is suppressed and the transplant can be taken out reliably.

  In addition, the feed arm 222 includes a spring 226 that is a biasing tool that biases in the feed operation direction and a stopper 227 that determines the limit position of the feed operation. Since it operates and is held at the limit position by the stopper 227, high-accuracy and stable positioning is possible. Therefore, proper take-out by the take-out device 43 is possible by simple cam drive.

  In addition, by setting the spring 226 of the feed arm 222 stronger than the torque spring 224 of the feed rod 221, the feed arm 222 can be returned after the feed rod 221 is retracted.

Regarding the backward movement amount of the feed arm 222 by the step control cam 222b, two types of trays having different pitches between the pots, for example, a 16 × 8 128-hole tray and a 20 × 10 200-hole tray are longer than the long pitch. By making the pitch less than twice the short pitch, it can be applied in common without requiring switching of the vertical feed.
By setting the diameter dimension of the entry portion 221a to be larger than the gap dimension of the groove portion D between the pots, the tray can be reliably fixed without play by the action of the torque spring 224.

  The step control cam 222b is formed longer than the engagement control cam 223b, so that the feed arm 222 moves slowly after the operation of the engagement control cam 223b is released. You can enter with certainty.

  Further, since the respective fulcrums of the feed rod 221 and the relay link 223 are located below the bottom surface of the tray T, the relay link 223 is pushed toward the tray T when the tray T is fed, so that the feed rod 221 escapes. Acts in the feed direction without any problems. Further, when the feed rod 221 is pulled out from the inter-pot groove D, it can be pulled straight out by slightly returning the feed arm 222, and conversely, when it is put into the inter-pot groove D, it is slowly returned by a cam. Thus, the feed rod 221 can be inserted smoothly.

  As for the outer guide 213, the subsequent tray T is reduced by narrowing the gap size into which the side edge of the tray T enters so as to be caught by the thickness of the side edge so that the added tray T is caught while the front end is overlapped. It is possible to prevent overlapping of the front end portions.

(Another configuration example)
Next, another configuration example of the feeder will be described. As shown in FIG. 23, an enlarged side view of the main part of the feeding tool 230 includes a feed rod 231 that can be engaged with a groove D between the pots on the back side of the tray T, and supports the feed rod 231 so as to be swingable. A feed arm 232 and a parallel rod 233 connected to the feed rod 231 in parallel with the feed arm 232 are provided.

  The feed rod 231 is provided with an entry portion 231 a that can enter the groove D between the pots on the back side of the tray T at the distal end, and a support shaft 231 b is provided at the base end to pivot on the distal end of the feed arm 232. At the same time, a base end arm 231c is provided to be connected to the parallel rod 233 so as to be swingable, and an engagement control cam 231d is provided at the base end portion, and the check roller 216 controls the tray T according to the action of the feed rod 231. The entry portion 231a is configured to be retractable from the inter-pot groove portion D.

  The feed arm 232 is provided with a support shaft 232a at the base end portion and pivotally supports the feed operation range of the feed rod 231 at the distal end portion so as to be swingable, and the stepping control cam moves the feed rod 231 backward from the feed position. 232b is provided. This step control cam 232b is formed so as to be able to go backward in the range exceeding the length of the pot portion P of the tray T under the action of the check roller 216. Further, a spring 236 is provided on the feed arm 232 to bias the feed rod 231 in the feed direction.

  The parallel rod 233 connects the base end arm 231c of the feed rod 231 to a long hole connecting portion 233a formed at the front end, and the length adjusting adjuster provided at the base end of the feed arm 232. A spring 234 is provided between the feed rod 231 and the proximal end arm 231c of the feed rod 231, and the entry portion 231a is attached in a direction in which the entry portion 231a enters the inter-pot groove D of the tray T within the movable range of the long hole connection portion 233a. Rush.

  The operation of the feeding tool 230 having the above-described configuration opposes the urging force of the spring 234 of the feed rod 231 and the spring 236 of the feed arm 232 by the check roller 216 acting on the engagement control cam 231d and the step control cam 232b. Thus, the feed rod 231 is retracted from the inter-pot groove D on the back surface of the tray T, and the feed arm 232 performs a backward operation to move the entry portion 231a to the adjacent pot portion P1.

  When the check roller 216 further rotates and the engagement control cam 231d and the step control cam 232b are released, the entry portion 231a of the feed rod 231 is adjacent to the pot portion P1 from the back side of the tray T by the biasing force of the spring 234. Next, when the feed arm 232 swings in the feed direction by the urging force of the spring 236, the adjacent pot portion P1 is fed and moved by entering the inter-pot groove portion D immediately below the adjacent pot portion P1. By repeating this, the tray T is sequentially moved.

  In the process of feeding the tray by the feeding tool 230, the long hole connecting portion 233a of the parallel rod 233 regulates the swing range of the proximal arm 231c of the feeding rod 231, and the depth of entry of the entry portion 231a with respect to the inter-pot groove D is set. By restraining, the feeding movement of the tray T becomes smooth, and by restraining the retracting amount from the groove portion D between the pots, the retreating operation by the engagement control cam 231d can be stably and speeded up. Further, the adjuster 232c of the parallel rod 233 enables fine adjustment of the entry depth of the entry portion 231a at the feed position.

(Field scene sensor)
Next, the agricultural field sensor which detects the height position of the ridge surface of a planting position is demonstrated.
As shown in FIG. 24, the farm scene sensor 401 has a side view (a) and a plan view (b) of a main part thereof. The position can be detected, and the contact surface member 402 is integrally formed with a plurality of bar members 402a extending in the front-rear direction of the machine body in parallel with a gap between adjacent members.

  The field scene sensor 401 having the above-described configuration can follow the surface of the surface without causing the plurality of bar members 402a... In addition, by forming the bar material 402a with a round bar, even if the scattered earth and sand are received by the contact surface member 402, the bar material 402a is not deposited on the bar material 402a, but is dropped on the side surfaces of the bar material 402a. Since the weight change of the face member 402 can be avoided, the required detection accuracy is maintained without causing a change in the detection characteristics of the heel surface height, and stable transplantation by the planting tool 42 becomes possible.

  Further, a flexible sheet 403 is provided under the bar 402a of the contact surface member 402, and the flexible sheet 403 is supported on the front end of the contact surface member 402. The flexible sheet 403 is provided in a range extending below the adjacent bar 402a through a gap on the side of the bar 402a, so that the bar 402a is in contact with the flange surface via the flexible sheet 403. Since the flexible sheet 403 extends between adjacent ones, the bar members 402a are supported on the surface without sinking.

  Therefore, the required detection accuracy can be ensured without causing a change in the detection characteristics of the ridge surface height. Moreover, since the flexible sheet 403 hangs down by the machine body lift, the sediment on the flexible sheet 403 can be discharged.

Next, a configuration example of the contact member by the circulating belt will be described.
As shown in FIG. 25, the contact surface member 411 is pivotally supported by a support shaft 413a provided at the tip of the support frame 413 so that the rear end of the contact surface arm 412 extending downward can be turned up and down. The front roller 414 is pivotally supported on the support shaft 413a, the rear roller 415 is pivotally supported at the rear end of the contact arm 412, and the endless belt 416 is wound between the front and rear rollers 414 and 415. The contact surface arm 412 is in contact with the flange surface via the endless belt 416, and the support height of the airframe can be detected by the inclination angle of the contact surface arm 412 in this state.

  Further, when the front roller 414 rotates in a direction in which the rear end of the contact surface arm 412 descends, a one-way clutch is provided so that the rotation of the front roller 414 can be restricted with respect to the support frame 413. Correspondingly, since the endless belt 416 rotates, the sediment on the belt 416 can be conveyed and discharged. Further, when the detection accuracy is reduced due to sedimentation, the contact surface member 411 is in a drooping posture by the body lift, and the sedimentation sediment can be discharged.

  Further, by forming the rear roller 415 with a sufficiently small diameter, the endless belt 416 can be strongly bent when the endless belt 416 circulates to promote the peeling of the attached earth and sand, and the scraper 417 is provided in contact with the endless belt 416. Thus, the attached earth and sand can be peeled off along with the circulation of the endless belt 416.

(Planting auxiliary member)
Next, the planting auxiliary member will be described.
As shown in FIG. 26, the planting auxiliary member has a plan view (a), a side view (b), and a rear view (c). It consists of tools 421 and 421 and left and right scrapers 422 and 422 by rubber plates acting on both sides of the planting tool 42.

  The left and right slope shaping tools 421 and the left and right scrapers 422 are attached to the rear end portion of the contact surface member 402 of the agricultural field sensor 401 so as to be opened and closed left and right via left and right support arms 423 and 423, respectively. , 423 are connected by a pinching spring 424, and stoppers 425, 425 are provided at the limit position on the closing side. The slope shaping tool 421 is configured such that the rear view can be adjusted to a “C” shape in accordance with the inclination of the slope.

  When the planting tool 42 is lowered, the planting auxiliary member configured as described above acts so as to be sandwiched from the left and right by the pinching spring 424. When the planting tool 42 is opened to the left and right to plant seedlings, the left and right slope shaping tools 421 are provided. , 421 opens and the planting tool 42 comes out, the left and right sides close and act so as to hold the heel slopes on both sides of the planting position, so that the soil is brought down immediately after planting, and the collapse caused by the planting of narrow cocoons is suppressed. The left and right scrapers 422 scrape off the soil attached to the planting tool 42 and close it to the limit position by the stoppers 425 and 425, thereby enabling stable planting without pinching the planted seedling.

(Separate contact member)
As shown in FIG. 27A, the contact surface member 431 of another configuration is provided with left and right support arms 432 and 432 at the front portion of the contact surface member 431, and the support arms 432 have fulcrums. In order to detect the rotation angle when the contact surface member 431 is rotated until the contact surface member 431 comes into contact with the flange surface U, the support arm 432 is provided with one support arm 432. A field scene sensor that can detect the rotation angle of the contact surface member 431 by connecting the detection rod 433 and detecting the rotation angle of the detection rod 433 is configured. Further, the contact surface member is connected to the front end portion of the contact surface member 431 via a rotation hinge 434. 431 is configured to be able to hang down from the left and right support arms 432 and 432.

  When earth and sand accumulates on the contact surface member 431, the contact surface member 431 hangs down and the accumulated earth and sand can be removed by lifting the airframe, so that the original detection accuracy can be ensured.

  The contact surface member 431 has a shape in which the lowest point is located behind the rotation fulcrum position of the rotation hinge 434 in the rotation range in contact with the saddle surface from the suspended state, so that the contact surface member is lowered by lowering the fuselage. It is possible to quickly return from the drooping posture to the detected posture without 431 exceeding the fulcrum.

  In addition, as shown in FIG. 27B, a side view around the planting tool is provided with a blocking member 435 that partitions the position immediately before the planting tool 42, thereby preventing the earth and sand from scattering to the front contact member 436. Since it can prevent, the fall of the detection accuracy of the field scene sensor by sedimentation of earth and sand can be eliminated.

(Seedling tank)
Next, the seedling tank will be described.
The seedling tank 441 has a descending slope for sending the seedling tray to a seedling extraction device 442 for supplying seedlings to the planting tool 42, as shown in FIG. 28 with a front view (a) and a longitudinal side view (b). It is a tray transporting device that is configured by a supply unit 443 and a discharge unit 444 that is bent so as to make a U-turn from its lower end to the lower surface side and guide an empty seedling tray, and an upper part of the supply unit 443 includes A foldable supply extension portion 445 is provided, and is configured to be foldable and housed in a range above the discharge port 444 a at the upper end of the discharge portion 444.

  In the seedling tank 441 configured as described above, when the tray inclines and descends the supply unit 443, the seedling extraction device 442 takes out the seedling and supplies it to the planting tool 42. The empty tray is bent from the lower end of the supply unit 443 to the lower surface side. In this case, since the retractable supply extension 445 is positioned above the discharge port 444a, the supply portion 443 is also provided when the supply extension 445 is stored. Since the empty tray can be discharged by the discharge unit 444 from the tray conveyance by the above, planting traveling is possible regardless of the development and storage of the supply extension unit 445.

(Planting link)
Next, the planting link of the planting tool 42 will be described.
As shown in FIG. 29, a side view of the planting link is held in parallel by two swing arms 451 and 451, so that the link of the link is more than that of the conventional two cranks and swing arm. A simple configuration can be achieved without incurring a parallel shift due to the phase difference. Further, by attaching the open / close arm 452 and the open / close cam 453 to one swing arm 451, loss due to play can be suppressed.

(Seedling extractor)
The seedling extraction device 442 is configured so that the root pot of the seedling is sandwiched by the movable blade 462 with the fixed blade 461 as a reference, as shown in FIG. 30 in a side view (a) and an enlarged plan view (b) thereof. The fixed blade 461 is configured with reference to the end face of the seedling root pot, and on the seedling tank 441 side, an extrusion rod 463 is provided so as to be able to advance and retreat by an extrusion arm 464, and the operation of the extrusion arm 464 is controlled by an extrusion cam 465. Thus, the seedling is configured to be extruded from the root pot. Further, the push cam 465 transmits the cam shaft 465a from the longitudinal movement operating shaft 110 that drives the left and right arms 111, 111 as shown in FIG.

(Pivot part)
Next, the pivot portion of the front wheel frame 17 will be described.
As shown in FIG. 32, a front view of the front wheel shaft attached to the enlarged cross-sectional view of the main part of the pivot portion is connected to the left and right oil-inlet chambers 471 and 471 with a hose 472, so Since the oil moves from the hose 472, the airframe can be stabilized in an inclined state without causing instability due to the action of restoring the airframe in parallel on an inclined ground in the case of a conventional spring connection.

  The hose 472 is provided with a throttle 473 such as a needle valve, so that it does not move due to oil movement but rolls with the elasticity of rubber against shaking of the airframe. It can be maintained stably. Further, by adjusting the throttle of the needle valve so as to increase the speed of oil movement in a field with many irregularities and slow in a smooth field, stable traveling corresponding to the situation becomes possible.

  The communication ports of the hoses 472 of the left and right oil inlet / inlet chambers 471 and 471 are formed below the air surface, so that the amount of air is maintained in each case even when oil moves during an inclination, and the elastic constant due to air is constant. Can be kept in.

  In addition, the needle valve can be closed and used, so that it can be fixed in a tilted state, enabling stepless horizontal remote control, and the needle valve can be locked as a ball valve or spool at hand. With this configuration, it can be used as a horizontal remote and can perform stable reciprocating work on an inclined land.

42 Planting tool 401 Farm scene sensor 402 Contact surface member 402a Bar material 403 Flexible sheet 411 Contact surface member 421 Slope surface plate 422 Scraper 431 Contact surface member 434 Rotating fulcrum 435 Blocking member 436 Contact surface member 441 Tray transport device 442 Unloader 443 Supply unit 444 Discharge unit 444a Discharge port 445 Supply extension unit U Surface (farm scene)

Claims (6)

A planting tool (42) for transplanting a transplant to the field by up and down planting operations, and a field scene sensor (401) for detecting the height position of the aircraft by a contact member supported so as to follow the field scene (U); A transplanter that travels while controlling the planting depth of the planting tool (42),
The transplanting machine is characterized in that the contact surface member is integrally formed in parallel by separating a plurality of bars (402a) extending in the front-rear direction of the machine body.   A flexible sheet (403) extending from the lower side of the bar (402a) to the lower side of the adjacent bar (402a) is provided, and the flexible sheet (403) is supported on the front portion of the contact member. The transplanter according to claim 1.   A planting auxiliary member is attached to the rear end portion of the contact surface member, and the planting auxiliary member has left and right slope shaping plates that act on the lateral slopes of both sides of the planting tool (42). 421) and left and right scrapers (422) in contact with both side surfaces of said planting tool (42).   4. A rotating fulcrum (434) is provided at a front end of the contact surface member, and the rotation fulcrum (434) is configured to be able to hang down the contact surface member when the machine body is lifted. The transplanter according to any one of the above.   The transplanter according to any one of claims 1 to 4, wherein a blocking member (435) for blocking earth and sand is provided between the contact surface member and the planting tool (42). . A tray transfer device (441) for transferring the seedling tray and a takeout device (442) for taking out the seedling stock from the seedling tray and supplying it to the planting tool (42) are provided, and the tray transfer device (441) A supply unit (443) that inclines and descends to the take-out position of the apparatus (442) and conveys the seedling tray, and a discharge unit (444) that bends to the lower surface side and guides the empty tray to incline and descends below it, A retractable supply extension portion (445) is provided above the discharge port (444a) of the discharge portion (444) and at the upper end of the supply portion (443), and the supply extension portion (445) The transplanter according to any one of claims 1 to 5, wherein the transplanter is located above an extension of the discharge path (444).

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