JP2011000096A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanter which improves the efficiency of transplantation.SOLUTION: In the seedling transplanter, a seedling-conveying line for conveying the stem portions of seedlings in an approximately horizontal state is formed; a pair of rollers for moving the tip portions of a pair of transplantation tines in a nipping direction are disposed at positions just under the final end portion of the seedling-conveying line; the tip end portions of a pair of the transplantation tines are passed between a pair of the rollers to nip the stem portion of the seedling; and the transplantation tines are moved from a traveling direction side to a lower position in a backward moving direction side in a state nipping the stem portion of the seedling with both the nipping members to insert and transplant the stem portion in a field. The roller placed on the seedling-conveying line side is disposed at a lower position than the seedling-conveying line.

Description

  The present invention relates to a seedling transplanting machine such as a sweet potato cutting seedling machine for transplanting a vine seedling such as a sweet potato seedling to a field.

  2. Description of the Related Art Conventionally, there is a sweet potato seedling transplanter as a seedling transplanter that transplants a sweet potato seedling by sandwiching a stem portion of a vine-shaped sweet potato seedling with a pair of transplanted claws and inserting the stem portion into a basket in a field. That is, it forms a seedling conveyance line that conveys the stem part of the seedling from one side to the other side in a substantially horizontal state, and the tip part of the pair of transplanting claws in the clamping direction at a position directly below the seedling conveyance line A pair of rollers to be actuated is placed, and the tips of a pair of transplanting claws are passed between the pair of rollers to sandwich the stem part of the seedling and transplanted in a state where the stem part of the seedling is sandwiched between both sandwiching bodies. The nail is moved from the advancing direction side downward to the retreating direction side, and the stem portion is inserted into the field and transplanted.

  Here, the tip of the transplantation nail moves while drawing an elliptical locus. And the front-end | tip part of a transplant nail | claw is formed in plate shape, and it is trying to clamp a stem part firmly by a surface part.

JP 2008-67661 A

  However, in the above-described sweet potato seedling machine, the roller located on one side of the seedling transport line collides with the base of the stem portion of the seedling being transported (which may be curved downward), and so on. May be disturbed, or seedlings may fall off the seedling transport line. In that case, since the transplanting claw cannot firmly hold the stem part of the seedling, the transplanting may not be suitably performed.

  Therefore, in the present invention, a seedling conveyance line for conveying the stem portion of the seedling in a substantially horizontal state is formed, and the tip portions of the pair of transplanting claws are operated in the clamping direction at a position immediately below the end portion of the seedling conveyance line. A pair of rollers to be placed, and the tip of the pair of transplanted claws is passed between the pair of rollers to sandwich the stem part of the seedling, and the transplanted nail is sandwiched between both the sandwiched bodies The seedling transplanting machine for inserting the stem into the field and transplanting it, the roller located on the seedling transport line side is positioned lower than the seedling transport line The present invention provides a seedling transplanter characterized by being arranged.

The present invention is also characterized by the following configuration.
(1) The other roller that closes the tip of the transplanting claw before the roller positioned on the seedling transport line side is outside a predetermined width from the virtual center line in the left-right direction than the roller positioned on the seedling transport line side. The tip contact position of the transplanting claw that is disposed closer to the upper peripheral surface of the other roller is positioned inward by a certain width from the imaginary line vertical line passing through the center of the roller.
(2) A seedling guide body that guides the proximal end portion of the stem portion of the seedling transported on the seedling transport line is attached to a position near the roller positioned on the seedling transporting line side.

  (1) In the present invention according to claim 1, a seedling transport line for transporting the stem portion of the seedling in a substantially horizontal state is formed, and the tips of the pair of transplanting claws are positioned immediately below the terminal portion of the seedling transport line. A pair of rollers that actuate the part in the clamping direction are arranged, and the tip part of the pair of transplanting claws is passed between the pair of rollers so that the stem part of the seedling is sandwiched, and the stem part of the seedling is sandwiched between both sandwiching bodies In this state, the transplanting claw is moved from the advancing direction side to the retreating direction side downward, the seedling transplanting machine for inserting and transplanting the stem portion in the field, and the roller located on the seedling conveying line side is configured to convey the seedling It is located lower than the line.

  In this way, the roller positioned on the seedling transport line side, which is the side on which the seedling is transported, is arranged at a lower position than the seedling transport line side, so the transported seedling and the roller collide, etc. Can be avoided. Therefore, it is possible to prevent the posture of the seedling from being disturbed by the collision with the roller or the like, or the seedling from falling off. As a result, the transplanting nail can firmly hold the stem portion of the seedling and the transplantation is also preferably performed, so that the transplantation efficiency can be improved.

  (2) In the present invention described in claim 2, the other roller that closes the tip of the transplanting claw before the roller positioned on the seedling transport line side is more lateral than the roller positioned on the seedling transport line side. The tip abutment position of the transplanting claw that contacts the upper peripheral surface of the other roller is located within a certain width from the virtual vertical line passing through the center of the roller. It is located in the direction.

  In this way, the tip abutment position of the transplanting claw that abuts the upper peripheral surface of the other roller is positioned inward by a certain width with respect to the imaginary line vertical line passing through the center of the roller. The contact angle of the tip of the nail to the roller peripheral surface becomes loose, and the tip of the graft nail smoothly moves downward along the roller peripheral surface, so that the closing action can be steadily received. As a result, it is possible to avoid the tip of the transplantation claw from colliding with the roller peripheral surface, and it is possible to prevent the transplantation claw or the peripheral surface of the roller from being deformed or damaged.

  (3) In the present invention described in claim 3, a seedling guide body that guides the proximal end portion of the stem portion of the seedling transported by the seedling transport line is disposed in the vicinity of the roller positioned on the seedling transporting line side. is doing.

  Therefore, since the seedling guide body disposed in the vicinity of the roller guides the proximal end portion of the stem portion of the seedling, it is possible to prevent a problem that the bent seedling or the like falls before the roller. Further, the seedling guide body is integrally attached to the roller, so that when the roller moves forward and backward, the seedling guide body also moves forward and backward integrally to ensure a good guide function.

Side surface explanatory drawing of the seedling transplanting machine which concerns on this invention. Plane explanatory drawing of the seedling transplanting machine. Cross-sectional side explanatory drawing of a seedling conveyance part. Explanatory drawing of a transplant part. The partially cutaway plane explanatory drawing of a seedling conveyance part. The back explanatory drawing of the seedling conveyance part. Plane explanatory drawing of a drive mechanism. Plane explanatory drawing of a seedling holder body. Back surface explanatory drawing of a seedling holder body. The left view of a seedling holder body. Explanatory drawing of transplant operation | movement of a transplant nail. Side surface explanatory drawing (a) and back surface explanatory drawing (b) of a clamping body. Side surface explanatory drawing (a) and back surface explanatory drawing (b) of the conventional clamping body. Plane explanatory drawing of an irrigation pump and piping. Plane explanatory drawing of an irrigation mechanism. Side notch side explanatory drawing of an irrigation mechanism. Cleaning side view (a) Cleaning side explanatory drawing (a), cleaning plane explanatory drawing (b), and cleaning back side explanatory drawing (c) of a clamping body. The back explanatory drawing of a forced clamping action body. Side surface explanatory drawing of a scraper body. Plane explanatory drawing of a scraper body.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a side explanatory view of the seedling transplanter A according to the present invention, and FIG. 2 is a plan explanatory view of the seedling transplanter A. In FIG. 1, G is a field, U is a basket formed on the field G, and M is a multi-film stretched so as to cover the surface of the basket U.

  As shown in FIGS. 1 and 2, the seedling transplanter A has an engine 2 mounted on the front part of a body frame 1 formed in a rectangular frame shape extending in the front-rear direction, and a rear end portion of the body frame 1 The transmission case 3 and the engine 2 are connected to each other via an interlocking case 4 by attaching a lower part of the mission case 3 formed vertically and vertically. A front wheel support 6 extending in the left-right direction via a bracket 5 is attached to the front of the machine body frame 1 so as to be swingable around its axis, and a support arm 7 is supported rearward and downward from the left and right end portions of the front wheel support 6. , 7 are suspended, and front wheels 8, 8 are attached to the lower ends of the support arms 7, 7 so as to be freely rollable. A base end portion of the shaft case 9, 9 extending outwardly is linked to the lower left and right sides of the transmission case 3, and a transmission case 10, 10 extending rearward and downward is provided at the distal end portion of each shaft case 9, 9. An upper end portion is interlocked and connected so as to be swingable around the axis of each of the shaft cases 9 and 9, and the rear wheels 11 and 11 are interlocked and connected to the lower end portions of the transmission cases 10 and 10. The front wheel support 6 and the transmission cases 10 and 10 are interlocked and connected to an elevating mechanism 12 so that the airframe can be raised and lowered. Reference numeral 13 denotes a lift sensor mechanism. The lift sensor mechanism 13 is provided with a sensing roller 13a that senses while rolling the upper surface of the ridge U, and the body is automatically moved by the lift mechanism 12 based on the sensing result of the sensing roller 13a. By raising and lowering, the planting (transplanting) depth of seedlings to be described later can be kept substantially constant.

  As shown in FIGS. 3 and 4, a support frame 20 formed in a three-dimensional frame shape is attached to the rear portion of the mission case 3 so as to protrude rearward. The support frame 20 includes an upper support frame forming body 21 that extends rearward from the rear upper part of the mission case 3 and has a U-shape in plan view, and a rear extension part 22 a that extends rearward from the rear lower part of the mission case 3. Formed and raised upward to form a rising portion 22b, with a lower support frame forming body 22 having an upper end connected to a middle portion of the upper support frame forming body 21, and a rising portion 22b of the lower support frame forming body 22 And an auxiliary frame forming body 23 connected thereto. The upper support frame forming body 21 has a rear portion as a handle 24. In FIG. 1, reference numeral 25 denotes a lifting / lowering planting lever that also serves as a lever for raising and lowering the aircraft and a lever for connecting / disconnecting a planting clutch, 26 is a traveling speed change lever, and 27 is a stock adjustment handle.

  Further, as shown in FIG. 3, a seedling transport unit 30 for transporting a vine-shaped seedling N such as a sweet potato seedling is disposed on the lower support frame forming body 22, and immediately after the lower support frame forming body 22. As shown in FIG. 4, a transplanting part 31 for transplanting the seedling N transported by the seedling transporting part into the cocoon U is disposed at the position, and the seedling is positioned immediately before the transplanting part 31. A film cutting part 32 is disposed below the transport part 30 via a rear extension part 22 a of the lower support frame forming body 22. In FIGS. 1 and 2, reference numeral 33 denotes a tank support frame disposed on each of the left and right sides of the mission case 3, and T denotes a water tank for irrigation placed on each tank support frame 33. In FIG. 1, reference numeral 34 denotes a pressure reducing roller.

[Seedling transport section 30]
As shown in FIGS. 3, 5, and 6, the seedling transport unit 30 places a large number of seedling holder bodies 41 on the surface of the endless belt-shaped transport belt 40 and along the rear edge thereof. Are attached at an interval in the extending direction of the belt, and the conveyor belt 40 is wound in a substantially inverted triangular shape in front view or rear view through a plurality of rollers, so that the upper seedling supply area X and the lower right seedling transport area Y And the lower left seedling holder return zone Z is formed.

  That is, as shown in FIGS. 3, 5, and 6, the seedling transport unit 30 has a pair of front and rear transport unit support frame forming bodies 42 connected to the rear extension 22 a of the lower support frame forming body 22. And each conveyance part support frame formation body 42 connects the up-down direction extension part 42a extended in an up-down direction, and the middle part of the upper end part of the up-down direction extension part 42a, and the left-right direction extension part 42b extended in the left-right direction. It is equipped with. A left upper roller support shaft 43 and a right upper roller support shaft 44 are installed on the left and right ends of the left and right extending portions 42b and 42b facing the front and rear, respectively, with their axes directed in the front and rear direction. Rollers 45, 45, 46, 46 are attached to the front and rear portions of the roller support shafts 43, 44 so as to face each other in the front-rear direction. A pair of left and right lower rollers 47, 47 having an axis line in the front-rear direction are disposed close to each other between the lower portions of the vertically extending portions 42a, 42a opposed to the front and rear. In this way, the conveyor belt 40 is wound around the rollers 45 to 47 described above.

  In FIGS. 5 and 6, reference numeral 48 denotes an engaging pin projecting radially from the end surface of the upper right roller 46, and a plurality of the engaging pins 48 are arranged at equal intervals in the circumferential direction of the roller 46. Yes. Reference numeral 49 denotes an engagement hole formed in the front and rear side edges of the conveyor belt 40. The engagement hole 49 is formed at a certain interval in the extending direction of the conveyor belt 40, and the engagement hole 49 is engaged with the engagement hole 49 described above. The combination pin 48 is engaged so that the conveying belt 40 is transferred in conjunction with the rotation of the roller 46. Reference numeral 50 denotes a protrusion for preventing displacement in the front-rear direction protruding from the inner peripheral surface of the conveyor belt 40, and 51 is a rotating body attached to the left upper roller support shaft 43. The above-described misregistration prevention protrusion strip 50 is engaged with the concave strip formed in the above-described configuration, thereby preventing the misalignment of the transport belt 40 in the front-rear direction. 52 is a guard body, 53 is a protector that protects the seedling N in the seedling transporting area Y held and transported by the seedling holder body 41 from below, and 54 is placed on the upper left side of the lower roller 47 on the left side. It is a guide roller that bends and guides the midway part of the return zone Z upward.

  As shown in FIGS. 5 and 6, a large number of partition walls 55 are arranged on the upper surface of the conveyor belt 40 in alignment with every other engagement hole 49. And the part of the conveyance belt 40 located between the adjacent partition walls 55 and 55 is used as the placement part 40a for one seedling N, and the seedling holder body 41 is arranged at the rear edge of each placement part 40a. is doing.

  Further, as shown in FIGS. 5 and 6, the right upper roller support shaft 44 is interlocked and connected via a drive mechanism 57 to a first drive shaft 56 that protrudes rightward from the right upper portion of the mission case 3, By rotating the rollers 46 and 46 intermittently only in the same direction (in this embodiment, clockwise in the rear view of FIG. 6) via the right upper roller support shaft 44 by the drive mechanism 57, the transport belt 40 is moved. It is made to convey for every predetermined pitch (In this embodiment, the space | interval of the engagement hole 49 is made into 1 pitch every 2 pitches.).

(Drive mechanism 57)
As shown in FIGS. 5 to 7, the drive mechanism 57 includes a swing mechanism 58 and a rotation mechanism 59.

  As shown in FIG. 7, the swing mechanism 58 can swing left and right about a swing support shaft 61 with the swing lever body 60 oriented in the vertical direction at the rear upper position of the first drive shaft 56. It is pivotally supported. The swing lever body 60 is formed with a left side extending piece 60a extending leftward and a rear upper extending piece 60b extending rearward and upward. And while attaching the center part of the disc 62 to the front-end | tip part of the said 1st drive shaft 56, while pivotally connecting the front-end part of the connection link 63 to the outer side surface part of the same disk 62 via the 1st connection pin 63a, The rear end portion of the connection link 63 is pivotally connected to the front end portion of the leftward extending piece 60a via a second connection pin 63b.

  As shown in FIGS. 5 to 7, the rotation mechanism portion 59 has a boss portion 65 rotatably fitted to the rear end portion of the right upper roller support shaft 44, and a drive sprocket on the rear end surface of the boss portion 65. 66 are arranged coaxially. A ratchet mechanism 67 is interposed between the boss 65 and the rear end of the right upper roller support shaft 44. Further, one end portion of the string-like piece 68 is connected to the rear end portion of the rear upper extending piece 60b of the swing lever body 60, the middle portion is hung around the drive sprocket 66, and the other end portion is connected. It is connected to a bracket 69 that hangs down from the laterally extending portion 42b on the rear side of the transport unit support frame forming body 42 described above. Here, the middle part of the string-like piece 68 is formed by a chain 68a that can be engaged with the tooth part of the drive sprocket 66 to improve the durability of the string-like piece 68. 68b is a turnbuckle, and 68c and 68d are tension springs. In FIGS. 5 and 7, reference numeral 70 denotes an irrigation mechanism disposed on the inside of the conveyor belt 40 that is wound around in a substantially inverted triangle shape.

  When the disk 62 is rotated in conjunction with the first drive shaft 56 in this way, the connecting link 63 connected to the peripheral edge of the disk 62 slides back and forth in the front-rear direction, and the swing lever body The front end portion of the leftward extending piece 60a formed on 60 is swung in the front-rear direction, and the rear end portion of the rear upper extending piece 60b is swung in the left-right direction. Then, the string-like piece 68 connected to the rear end portion of the rear upper extending piece 60b is pulled and slid in the left-right direction to rotate the drive sprocket 66 forward and backward. As a result, the right upper roller support shaft 44 is intermittently rotated forward (clockwise in the rear view in FIG. 6) via the ratchet mechanism 67.

(Seedling holder body 41)
As shown in FIGS. 8 to 10, the seedling holder body 41 is raised above the rectangular plate-like substrate piece 71 fixed to the upper rear edge of the conveyor belt 40 and the right edge of the substrate piece 71. A fixed-side holder-forming piece 72 is formed, and a movable-side holder-forming piece 73 is pivotally supported at the left edge of the substrate piece 71 so as to be tiltable.

  As shown in FIGS. 8 to 10, a placement guide piece 71 a is erected on the front edge portion of the substrate piece 71, and a pivot piece 71 b is erected on the left rear edge portion of the substrate piece 71. Yes. The fixed-side holder forming piece 72 is formed of a fixed-side main piece 72a and a soft piece 72b such as a sponge formed in a semi-cylindrical shape, and a locking constricted portion 72c is formed at the lower center of the fixed-side main piece 72a. ing. The movable side holder forming piece 73 is formed of a movable side main piece 73a formed in a substantially portal shape in a side view and soft pieces 73b and 73b such as sponges formed in a semi-cylindrical shape, and is formed at the bottom of the bifurcated movable side main body 73a Is pivotally supported on the front and rear pivot shafts 74 and 74 with the axis line oriented in the front-rear direction on the placement guide piece 71a and the pivot piece 71b. Then, a rod-like actuated piece 73c extending outward is provided at the upper part of the front end edge of the movable side piece 73a so as to protrude outward, and the lower part of the rear end edge of the movable side piece 73a is directed rightward. The proximal end of the clamping operation lever 73d that extends is connected. Further, a support piece 73e protrudes from the front side of the outer side surface of the movable side piece 73a to the left side, and a front end of a lock pin 73f extending in the front-rear direction is connected to the support piece 73e. Is cantilevered. A tension spring 75 is interposed between the middle portion of the locking pin 73f and the locking constricted portion 72c.

  In this way, the movable side holder forming piece 73 stands by in the vicinity of the fixed side holder forming piece 72 so as to hold the stem k of the seedling N, and is separated from the fixed side holder forming piece 72 and waits. The posture can be freely changed with respect to the standby posture (Fb).

  5 and 6, in the clamping posture (Fa), the soft piece 72b of the fixed side holder forming piece 72 and the soft pieces 73b and 73b of the movable side holder forming piece 73 are pressed from the left and right directions. In contact. At this time, the locking pin 73f is positioned above the axial position of the front and rear pivot shafts 74, 74 serving as fulcrums (over the fulcrum), and the tension spring 75 locked to the locking pin 73f is moved to the movable side holder forming piece 73. The holding posture (Fa) is maintained by pulling in the direction of standing up.

  Further, as shown in FIGS. 8 to 10, in the standby posture (Fb), the movable side holder forming piece 73 is tilted to the left and outward, and the soft piece 72b of the fixed side holder forming piece 72 and the movable side holder forming piece are arranged. A large opening is provided between the 73 soft pieces 73b and 73b. At this time, the locking pin 73f is positioned below (over the fulcrum) the axial position of the front and rear pivot shafts 74, 74 serving as fulcrums, and the tension springs 75 locked to the locking pins 73f are movable side holder forming pieces 73. The stand-by posture (Fb) is maintained by pulling in the direction of tilting.

  As shown in FIGS. 8 and 9, the clamping operation lever 73 d has an inclined posture in which the upper end surface 73 g of the tip portion is close to the upper portion of the fixed side holder forming piece 72. Therefore, the stem k of the seedling N is placed on the upper end surface 73g, and the movable side holder forming piece 73 is raised by pressing the upper end surface 73g downward and rotating the clamping operation lever 73d downward. Thus, the posture can be changed to the holding posture (Fa). Here, the upper end surface 73g of the front end portion of the clamping operation lever 73d is a downward inclined surface to the lower right side in the clamping posture (Fa) and an upward inclined surface to the upper right side in the standby posture (Fb). The inclined surface overlaps with the rear soft piece 73b in the front-rear direction (overlap). Therefore, the upper end face 73g does not interfere with the stem k of the seedling N in the holding posture (Fa), and the upper end face 73g and the rear soft piece 73b are not in the standby posture (Fb). The stem k is prevented from being caught between the two.

  As shown in FIGS. 3 to 6, an arrangement guide body 76 is provided at a position near the rear of the seedling supply area X of the transport belt 40. That is, the base end portions of the support arms 76a and 76a are attached to the left and right side portions of the left and right direction extending portion 42b that forms a part of the rear transfer unit support frame forming body 42, and the left and right direction between the support arms 76a and 76a is attached. A rod-shaped guide rod 76b that extends in the direction is constructed. The guide rod 76b is disposed at a ground level substantially the same as the axial position of the front and rear pivot shafts 74 and 74, and is disposed at a position separated from the rear pivot 74 by a predetermined width.

  Thus, as shown in FIG. 3 and FIG. 4, when holding the stem k of the seedling N in the seedling holder body 41, the proximal end of the stem k is directed downward, The base end is brought into contact with the guide rod 76b. By doing so, the base end position of the stem k of the seedling N can be orderly aligned in the seedling supply area X, and the rearward protruding amount of the base end of the stem k can be made uniform. And the base end of the stem part k can be made into an upward attitude | position in the terminal part of the seedling conveyance area | region Y. FIG. As a result, it is possible to improve the pinching property by the transplanting claw and the insertion property into the heel U in the transplanting portion 31 described later, and the transplanting work efficiency can be increased.

  Further, as shown in FIG. 6, in the vicinity of the terminal portion of the seedling holder return zone Z, a posture changing body 77 that changes the posture from the holding posture (Fa) to the standby posture (Fb) of the movable side holder forming piece 73 is provided. It is arranged.

(Posture change body 77)
As shown in FIGS. 3 and 6, the posture changing body 77 is provided on the left end portion of the laterally extending portion 42 b that forms a part of the rear transport section support frame forming body 42 via an action piece support bracket 77 a. The action piece 77b is attached and formed. The action piece support bracket 77a has an upper end attached to the left end portion of the left and right extension portion 42b, extends the middle portion downward and bends forward, and further bends upward and is substantially J-shaped in left side view. An action roller as an action piece 77b is rotatably attached to a tip end portion 77c that is formed in a shape and is bent upward via a roller support shaft 77d having an axis line in the front-rear direction. The actuated piece 73c projecting from the movable side holder forming piece 73 of the seedling holder body 41 transported in a posture (Fa) holding the seedling holder return zone Z to the upper peripheral surface of the action roller is in sliding contact (acting). Thus, the movable holder forming piece 73 is changed in posture to the standby posture (Fb).

  Here, the rotation axis of the working roller is arranged at a position directly below the rotation axis of the left upper roller 45 arranged between the seedling holder return zone Z and the seedling supply zone X, as shown in FIG. Both rotation axes are arranged in parallel and face each other up and down.

  As described above, since the posture changing body 77 is disposed in the vicinity of the terminal portion of the seedling holder return area Z, the movable side holder forming piece 73 is changed from the holding posture (Fa) to the standby posture (Fb) by the posture changing body 77. Even if the impact of the change operation is propagated to the seedling holder return area Z, the seedling supply area is separated via the upper roller 45 that divides the seedling holder return area Z and the seedling supply area X. X does not propagate the impact as vibration. Therefore, the seedling supply area X of the conveyor belt 40 does not wave. As a result, the operator supplies and arranges the seedling N on the seedling holder body 41 on the transport belt 40 in the seedling supply area X that does not undulate due to vibration, so that the seedling placement work can be performed steadily and easily. It can be done and work fatigue can be reduced.

  In addition, the action piece 77b of the posture changing body 77 arranged in the vicinity of the terminal end of the seedling holder return zone Z acts on the acting piece 73c provided on the movable side holder forming piece 73, and the movable side holder forming piece 73 is The posture can be steadily changed from the holding posture (Fa) to the standby posture (Fb). At this time, the action operation of the action piece 77b and the action piece 73c and the posture changing action of the movable side holder forming piece 73 are the seedling holder return zone Z below the seedling supply area where the operator performs seedling supply / placement work. Therefore, it will not hinder the worker's seedling supply and placement work. In addition, since the movable side holder forming piece 73 of the seedling holder body 41 has already been changed to the standby position (Fa) at the beginning of the seedling supply area X, the seedling holder body 41 in which the operator performs seedling supply / placement work. The degree of freedom of whether or not to perform is increased, and seedling supply / placement workability can be improved.

  Further, since the peripheral surface of the rollable working roller acts on the actuated piece 73c, the posture changing action of the actuating roller on the actuated piece 73c is made light and the transfer load of the transport belt 40 is increased. Is reduced. Therefore, no impact occurs when the movable side holder forming piece 73 is subjected to the posture changing operation, and the undulation phenomenon of the transport belt 40 is reduced even in the seedling holder return zone Z. As a result, seedling supply / placement work efficiency is increased.

  Then, the rotation axis of the working roller is arranged at a position directly below the rotation axis of the left upper roller 45 arranged between the seedling holder return area Z and the seedling supply area X, and both the rotation axes are parallel to each other. Therefore, the working roller can be arranged as close as possible to the end portion of the seedling holder return zone Z that is hung around the upper roller 45 on the left side. Therefore, the wavy phenomenon in the seedling holder return area Z that occurs when the movable roller forming piece 73 is changed to the standby posture (Fb) by the action roller acting on the acting piece 73c can be steadily reduced. .

[Transplanted part 31]
As shown in FIG. 4, the transplanting portion 31 supports the planting rotary shaft 78 on the auxiliary frame forming body 23 with its axis lined in the left-right direction and protrudes leftward from the mission case 3. The left end portion of the planting rotary shaft 78 is linked and connected to a shaft 64 (see FIG. 2) via a transmission shaft case 79 (see FIGS. 1 and 2). On the other hand, a pair of left and right transplanting claws 81, 81 are interlocked and connected to the right end portion of the planting rotation shaft 78 via a planting drive mechanism 80, and as shown in FIG. The distal end portion is configured to reciprocate while drawing a transplantation locus K composed of an arcuate forward trajectory K1 and an arcuate return trajectory K2.

  Then, as shown in FIG. 4, a forced clamping action body 82 is disposed on the start end side of the forward path K1, and the distal ends of the pair of left and right transplanting claws 81, 81 are forced by the forced clamping action body 82. The clamping operation is performed. At this time, the stem portion k of the seedling N held by the seedling holder body 41 conveyed immediately below the pair of left and right lower rollers 47, 47 is transferred to the pair of left and right transplanting claws 81, via the forced clamping action body 82. The tip end portion of 81 is firmly held, and the seedling N is taken out from the seedling holder body 41. Then, the stem k of the seedling N is inserted into the heel U, which is the terminal portion of the forward path K1, and transplanted. Thereafter, the distal ends of the pair of left and right transplanting claws 81 are moved apart to release the holding state of the stem k, and return to the original starting position while drawing the return path K2. A scraper body 83 is disposed in the middle of the return path K2, and the distal ends of the pair of left and right transplanting claws 81, 81 are passed through the scraper body 83. The mud that adheres to the inner and outer surfaces is scraped off.

  Below, the characteristic structure of the transplant part 31 is demonstrated more concretely.

(Transplantation nail 81)
As shown in FIG. 11, the proximal end portions of the pair of left and right transplanting claws 81, 81 are attached to the rotation support arm 80 a forming a part of the above-described planting drive mechanism 80, and the distal end portions of both transplantation claws 81, 81 are attached. The stem k of the seedling N can be clamped by bringing the seedling N into contact with each other, and the seedling can be released by separating it.

  And the transplantation nail | claw 81 is formed from the nail | claw main body 84 and the clamping body 85 attached to the front-end | tip part of the same nail | claw main body 84, as shown in FIG. The claw body 84 is formed of a base end side claw forming piece 84a that extends straight and a front end claw forming piece 84b that is folded back from the tip of the base end claw forming piece 84a and extends in a curved shape.

  As shown in FIG. 12, the sandwiching body 85 is formed in a plate shape extending along the tip side claw forming piece 84 b, and the sandwiching body 85 makes the stem k of the seedling N facing each other between the side surfaces. The retraction direction side portion 85a is sandwiched between the retraction direction side portion 85a and the retraction direction side portion 85a and is formed integrally with the retreat direction side portion 85a.

  Here, as shown in FIGS. 12 (a) and 12 (b), the portion k1 on the distal end side of the stem k is substantially perpendicular to the portion k2 of the stem k sandwiched between the receding direction side portions 85a and 85a. Of the stem k that is bent to be inserted into the heel U and is located in the vicinity of the portion k2, and is located on the insertion tip side and is susceptible to insertion resistance from the soil forming the heel U It is. 13 (a) and 13 (b) show the stem k of the seedling N sandwiched between the conventional sandwich bodies 200, 200, and the portion k1 on the tip side of the stem k is the sandwich bodies 200, 200. Since it is not covered, the portion k1 is easily damaged by receiving insertion resistance from the soil forming the ridge U.

  And the advancing direction side part 85b is extended and formed toward the outer side from the boundary part 85c with the retreating direction side part 85a, and has the protection function of the advancing direction side part 85b and the clamping function of the retreating direction side part 85a. Both are simply formed integrally while ensuring good. In addition, the boundary portion 85c is bent so that the inner surface becomes a circular arc surface, thereby preventing the portion of the stem portion k located in the boundary portion 85c from being damaged.

  Therefore, as shown in FIG. 12B, the pair of left and right sandwiching bodies 85 and 85 are formed by gradually separating the inner side surfaces of the traveling direction side portions 85b and 85b toward the traveling direction side (toward the front). Will be.

  In FIG. 12 (a), 84c is a clamping receiving surface formed on the outer surface of the distal end portion of the distal claw forming piece 84b. The pinching action receiving surface 84c is formed in an inclined surface that tapers toward the tip so that it can be easily subjected to a forced pinching action from a forced pinching action body 82 described later. Reference numeral 85 d denotes a blade surface formed on the outer surface of the front end portion of the sandwiching body 85. The blade surface 85d is formed in an inclined surface that is tapered toward the tip so that the blade surface can be easily inserted into the bag and can be easily subjected to a forced clamping action from a forced clamping mechanism 82 described later.

  Thus, in a state where the vine-like stem portion k of the seedling N is sandwiched between the pair of left and right sandwiching bodies 85, 85, the transplanting claws 81, 81 are moved from the traveling direction side (the front side in the present embodiment) to the backward direction side. (In this embodiment, it is moved backward) The stem k of the seedling N is inserted into the heel U and transplanted. At this time, the sandwiching bodies 85, 85 include a retreating direction side part 85a for sandwiching the stem k of the seedling N and a traveling direction side part 85b for covering the tip k1 of the stem k of the seedling N from both sides. Therefore, when the seedling N is transplanted into the cocoon U, the stem portion k1 on the distal side extends from the portion k2 sandwiched between the retreating direction side portions 85a of the sandwiching bodies 85 along the transplanting nail 81. The side surfaces of the traveling direction side portion 85b are covered from the side. Therefore, the portion k1 of the stem k from the portion sandwiched by the retreating direction side portion 85a is protected by the advancing direction side portion 85b and receives entry (insertion) resistance from the soil forming the ridge U at the time of transplantation. There is no. As a result, it is not damaged by soil resistance. Similarly, when the multi-film M is stretched on the surface of the ridge U formed in the field G, the stem k of the seedling N does not receive the entry (insertion) resistance of the multi-film M. Not to be equal.

  Moreover, the front-end | tip part of both the clamping bodies 85 and 85 can position-shift in the extending direction of the front end side nail | claw formation piece 84b, and can also make any one clamping body 85 precede in the transplant direction rather than the other clamping body 85. .

  In this way, by causing one of the sandwiching bodies 85 to precede, the resistance that the sandwiching body 85 receives from the soil when the sandwiching body 85 enters (inserts) into the ridge U during transplantation can be reduced. Therefore, when the multi-film M is stretched, the multi-film M can be punctured firmly, and the stem k of the seedling N is damaged due to the multi-film entry (insertion) resistance. Can be prevented.

  Further, as shown in FIG. 17, the inner surfaces of the holding bodies 85 and 85 are irrigated by the irrigation mechanism 70 so that the inner surfaces of the holding bodies 85 and 85 can be washed.

(Irrigation mechanism 70)
As shown in FIGS. 3, 7 and 14, the irrigation mechanism 70 is connected to the first drive shaft 56 projecting from the mission case 3 by linking irrigation pumps 87, 87 via a cam mechanism 86. The irrigation pumps 87 and 87 absorb water from the water tanks T and T through water suction pipes 88 and 88 serving as water suction paths, as well as water supply pipes 89 and 89 serving as water supply paths, and water supply pipes 90 and 90 (see FIG. 11)), and water can be irrigated in the ridge U, and the inner side surfaces of the holding bodies 85 and 85 can be washed.

  As shown in FIGS. 15 and 16, the cam mechanism portion 86 attaches the cam surface forming body 91 to the first drive shaft 56 and arranges the cam follower forming body 92 at a position immediately behind the cam surface forming body 91. is doing.

  As shown in FIGS. 15 and 16, the cam surface forming body 91 faces the disc 62 in which the support piece 93 is attached to the distal end portion of the first drive shaft 56 on the outer peripheral surface of the first drive shaft 56. A cam surface forming piece 94 having a bending deformation plate shape is installed between the circular plate 62 and the support piece 93 so that the cam surface forming piece 94 rotates concentrically with the first drive shaft 56. Yes. Then, on the outer surface of the cam surface forming piece 94, a soil irrigation cam surface 94a, a pause cam surface 94b, and a sandwiching member cleaning cam surface 94c are successively formed in this order from the rotational direction side.

  As shown in FIGS. 3, 15, and 16, the cam follower forming body 92 pivotally supports the upper portion of the forming body main body 96 via a pivot shaft 95 that is axially directed to the upper support frame forming body 21 in the left-right direction. The follower roller 98 is pivotally supported via a pivot pin 97 having an axis lined in the left-right direction at the lower front part, while the action plate 99 is provided at the lower rear part so that the action surface 99a faces rearward. It is attached to. The peripheral surface of the follower roller 98 is pressed against the outer surface of the cam surface forming piece 94 in a pressed state.

  Moreover, as shown in FIG. 14, the interlocking body 100 is connected in a spanning manner between the tips of the cylinder rods 87a, 87a provided in the irrigation pumps 87, 87. The interlocking body 100 includes a connecting plate 101 with which the tips of the cylinder rods 87a and 87a abut, a pair of left and right pivoting pieces 102 and 102 projecting from the front side of the connecting plate 101, and between the two pivoting pieces 102 and 102. A rolling roller 103 pivotally supported via a pivot pin 104 is provided. The circumferential surface of the rolling roller 103 is brought into contact with the working surface 99a of the working plate 99.

  In this way, when the first drive shaft 56 is rotated in the rotation direction r shown in FIG. 16, the cam surface forming piece 94 is also integrally rotated in the rotation direction r. Then, the rotational force of the cam surface forming piece 94 is transmitted to the follower roller 98 → the forming body 96 → the action plate 99 → the rolling roller 103 → the connecting plate 101 → the cylinder rods 87a and 87a. Operate water absorption and water discharge. At this time, on the outer surface of the cam surface forming piece 94, a soil irrigation cam surface 94a, a resting cam surface 94b, and a sandwich member cleaning cam surface 94c are formed in order from the rotation direction side, and the irrigation pump 87, The water discharge pressure of 87 is different in two stages (in the latter case, the water discharge pressure is higher than that of the former) between the irrigation in the soil and the cleaning of the sandwich body.

  That is, as shown in FIG. 16, the follower roller 98 is pressed against the underwater irrigation cam surface 94a during irrigation, while the follower roller 98 is pressed against the nip cleaning cam surface 94c during nip washing. The irrigation pumps 87, 87 are operated to discharge water only when irrigating in the soil and when the sandwich body is washed. Moreover, water is discharged from the irrigation pumps 87 and 87 at a relatively higher water discharge pressure when washing the sandwich body than when irrigating in the soil. Further, by forming the suspending cam surface 94b between the soil irrigation cam surface 94a and the cleaning cam surface 94c, while the follower roller 98 is pressed against the suspending cam surface 94b in a pressed state. The water discharged from the irrigation pumps 87 and 87 is temporarily stopped. Here, the time of irrigation in the soil is immediately after the holding bodies 85, 85 provided at the tip of the transplanting nail 81 are inserted into the heel U with the seedling N held therebetween, and thereafter the holding of the seedling N is released. It means the time when water is irrigated into the soil of the heel U (see transplanted nail posture (Fc) in FIG. 11). In addition, the time when the sandwiched body 85, 85 is cleaned immediately before the sandwiched body 85, 85 is passed through the scraper body 83 disposed in the middle part of the return path K2 refers to the time when the sandwiched body 85, 85 is washed (see FIG. 11 transplanted nail posture (Fd)).

  In this way, the water discharge pressure can be made different between when irrigating the inner side surfaces of the sandwiching bodies 85 and 85 and when irrigating near the stem k of the seedling N transplanted in the heel U. That is, when irrigating the inner surfaces of the sandwiching bodies 85, 85, the water discharge pressure is made relatively high so that the soil adhering to the inner surfaces of the sandwiching bodies 85, 85 can be washed away steadily. In the case of irrigating the stem k of the seedling N transplanted in U, the water discharge pressure can be made relatively low so that irrigation U can be gently irrigated, thereby improving the irrigation efficiency.

  As shown in FIG. 17A, the water supply pipes 90, 90 are arranged along the formation pieces 84a, 84b from the tip end position of the base end side nail formation piece 84a to the tip end position of the tip end side nail formation piece 84b. Piping. And the front-end | tip part of each water absorption pipe 90,90 turns into the water outlets 90a and 90a which are the termination | terminus parts of a water supply path, and as shown to FIG.17 (b) (c), each water outlet 90a, 90a is each While arrange | positioning in the vicinity of the clamping bodies 85 and 85, each water outlet 90a and 90a is orientated so that it may oppose.

  As shown in FIG. 17, the water discharge direction discharged from one water discharge port 90a and the water discharge direction discharged from the other water discharge port 90a are set so as not to collide three-dimensionally. Moreover, each water outlet 90a, 90a arrange | positioned in the vicinity of each clamping body 85,85 is the upper side rather than each clamping body 85,85 in a transplant direction, as shown to the clamping body projection surface of FIG.17 (c). And it has arrange | positioned in the projection cross section of each clamping body 85 and 85 orthogonal to a transplant direction. In FIG. 17, Q1 and Q2 are water discharge trajectories, and W1 and W2 are cross sections at the intersections of the water discharge trajectories Q1 and Q2, and do not interfere with each other.

  In this manner, the water outlets 90a and 90a arranged in the vicinity of the sandwiching bodies 85 and 85 are directed to irrigate the inner side surfaces of the opposing sandwiching bodies 85 and 85 (particularly, the backward direction side portion 85a). Therefore, the soil adhering to the inner surfaces of the sandwiching bodies 85, 85 facing the water discharge ports 90a, 90a can be washed out steadily. Moreover, since the water discharge direction is set so as not to collide three-dimensionally, the soil adhering to the inner side surfaces of the opposing sandwiching bodies 85, 85 can be washed out steadily with water discharged three-dimensionally. . Furthermore, since each spout 90a, 90a is arrange | positioned in the projection cross section of the clamping bodies 85 and 85, when the clamping bodies 85 and 85 are inserted in the ridge U in the transplanting direction, the clamping bodies 85 and 85 are inserted. Since the water outlets 90a, 90a are protected, clogging and wear of the water outlets 90a, 90a can be prevented.

(Forced clamping body 82)
As shown in FIG. 4, the forcibly clamping action body 82 is disposed on the start end side of the forward path K <b> 1, and is disposed below the lower rollers 47 and 47 provided in the seedling transport unit 30. Then, as shown in FIG. 18, the forcible clamping body 82 forcibly operates the tips of the pair of left and right transplanting claws 81, 81 in the clamping direction, so that the position immediately below the lower rollers 47, 47 (seedling conveyance) The stem portion k of the seedling N held by the seedling holder body 41 transported to the end position of the zone Y) is firmly held. L is a seedling holding position line drawn by a position where the seedling holder body 41 holds the seedling N. The seedling holding position line L in the seedling transporting area Y is transported by the base end portion of the seedling N held by the seedling holder body 41. It is a seedling transportation line to draw while being done.

  As shown in FIG. 18, the forced clamping action body 82 is arranged with the left action part 105 and the right action part 106 facing the rising part 22 b of the lower support frame forming body 22 in the left-right direction. The left and right action portions 105 and 106 are provided with upper portions of upper and lower extension pieces 107 and 108 formed by extending in the vertical direction on the rising portion 22b, and cylinders extending in the left and right directions at the lower ends of the respective vertical extension pieces 107 and 108. The support pieces 109 and 110 are attached. Support rods 111 and 112 extending in the left-right direction are inserted into the respective cylindrical support pieces 109 and 110 so as to be able to advance and retreat in the axial direction, and rollers having a U-shape in plan view are inserted into the tips of the support rods 111 and 112. Support pieces 113 and 114 are attached. Nipping action rollers 117 and 118 are pivotally supported on the roller support pieces 113 and 114 via roller support shafts 115 and 116 having axial lines directed in the front-rear direction. 119 and 120 are spring support pieces installed between the lower ends of the vertically extending pieces 107 and 108 and the lower end portions of the roller support pieces 113 and 114, and 121 and 122 are wound around the outer peripheral surfaces of the respective spring support pieces 119 and 120. And a pressing spring that presses and biases each of the roller support pieces 113 and 114 inward.

  Here, as shown in FIG. 18, the support rods 111 and 112 are arranged so that the axis is inclined inward and upward, and the axis of each support rod 111 and 112 and the axis of the roller support shafts 115 and 116 are arranged. Are arranged in a substantially orthogonal state. The pinching action receiving surface 84c, which is the outer front end portion of the transplanting claws 81, 81 moving rearward and downward along the forward path K1, is provided on the outer peripheral surface of the right and left pinching action rollers 117, 118 that can roll freely. , 84c and the blade surfaces 85d, 85d are steadily subjected to a forcible clamping action (an action of forcibly moving the clamping body in the clamping direction) while sliding. Moreover, the left clamping action roller 117 has its upper end positioned above the seedling holding position line L, while the right clamping action roller 118 on the seedling conveying line side has a difference in elevation from the seedling holding position line L. H is arranged below. Further, the left pinching action roller 117 is disposed on the outer side by a certain width (a minute width w in the present embodiment) from the virtual center line C in the left-right direction with respect to the right pinching action roller 118, and the left pinching action roller 118. The tip abutting position of the transplanting claw 81 that abuts on the upper peripheral surface of 117 is positioned inward by a minute width w from the imaginary line vertical line V passing through the center of the pinching action roller 117.

  Also, as shown in FIG. 18, a seedling guide body 160 that guides the proximal end portion of the stem k of the seedling N transported by the seedling transport line is attached to the right action portion 106 located on the seedling transporting line side. Yes. That is, the support piece 161 is attached to the right roller support piece 114, the upper end portion 123 of the support piece 161 is extended to a position above the upper end of the right clamping action roller 118, and a linear seedling guide is formed on the upper end portion 162. The base end of the piece 163 is attached, and the tip of the seedling guide piece 163 is extended substantially horizontally to the right side.

  Thus, the right clamping action roller 118 located on the seedling conveyance line side, which is the side to which the seedling N is conveyed, is made to have a height difference H higher than the left clamping action roller 117, which is the side from which the seedling N is collected. Since it is arranged at a low position, it is possible to avoid a collision between the seedling N being conveyed and the right clamping action roller 118. For this reason, it is possible to prevent the posture of the seedling N from being disturbed or the seedling N from falling off due to a collision with the right-side pinching action roller 118 or the like. As a result, the holding bodies 85, 85 of the transplanting claws 81, 81 can firmly hold the stem portion k of the seedling N and transplantation is also suitably performed, so that transplantation efficiency can be improved.

  Moreover, the tip contact position of the transplanting claw 81 that contacts the upper peripheral surface of the left pinching action roller 117 is positioned inward by a minute width w from the virtual vertical line V passing through the center of the pinching action roller 117. Therefore, the contact angle at which the tip of the transplantation claw 81 abuts on the peripheral surface of the pinching action roller 117 becomes loose, and the transplantation claw 81 moves while the tip of the transplantation claw 81 slides along the roller peripheral surface. By smoothly moving downward, it is possible to receive a closing action from the pinching action roller 117 in a direction in which the stem k is firmly pinched. As a result, it is possible to avoid the tip of the transplanting claw 81 from colliding with the roller peripheral surface, and it is possible to prevent the peripheral surface of the transplanting claw 81 or the pinching action roller 117 from being deformed or damaged.

  Furthermore, since the seedling guide body 160 attached to the right action portion 106 guides the base end portion of the stem k of the seedling N, it is possible to prevent a problem that bent seedlings and the like fall before the right holding action roller 118. Can do. In addition, since the seedling guide body 160 is attached to the roller support piece 113 that supports the pinching action roller 118, when the pinching action roller 118 moves forward and backward, the seedling guide body 160 also moves forward and backward integrally to perform a guide function. It can be ensured satisfactorily.

(Scraper body 83)
As shown in FIGS. 1 and 2, the scraper body 83 is attached to the auxiliary frame forming body 23 and disposed in the middle of the return path K2. 19 and 20, the scraper body 83 includes a pair of left and right fixed-side scraper pieces 125, 126 and a movable-side scraper piece 127 disposed above the fixed-side scraper pieces 125, 126. , And a posture changing mechanism 128 that acts on the movable-side scraper piece 127 to change the posture.

  As shown in FIGS. 19 and 20, the pair of left and right fixed-side scraper pieces 125 and 126 are formed in a rectangular plate shape of longitudinal front and rear by elastic rubber or the like, and left and right at a position immediately below the forcibly clamping action body 82. The inner end faces are arranged opposite to each other with a certain interval in the direction, and are attached to the auxiliary frame forming body 23 via brackets 129 and 130. The opposing inner end surfaces are adhered scraping surfaces 131 and 132.

  As shown in FIGS. 19 and 20, the movable-side scraper piece 127 is formed in the shape of a rectangular plate having a longitudinal direction by elastic rubber or the like, and is positioned immediately above the fixed-side scraper pieces 125, 126 by the posture changing mechanism 128. It is possible to change the posture by advancing and retreating between the advanced usage posture (A) (shown by an imaginary line in FIG. 20) and the non-use posture (B) retracted outward to the right (shown by a solid line in FIG. 20). ing. And the left and right end surfaces are formed as the scraping surfaces 133 and 134 of the adhered material.

  Here, as indicated by an imaginary line in FIG. 19, when the distal ends of the transplanting claws 81, 81, in particular, the clamping bodies 85, 85 move from the lower side to the upper side along the return path K2, the movable-side scraper piece 127 is moved. The posture is changed to the use posture (A) so that the distal ends of the transplanting claws 81 and 81 pass between the fixed and movable scraper pieces. And, deposits such as mud adhering to the outer side surfaces of the tips of the transplant claws 81 and 81 are scraped off by the deposit scraping surfaces 131 and 132 of the fixed-side scraper pieces 125 and 126, while the transplant claws 81 and 81 The adhering matter such as mud adhering to the inner side surface of the tip portion is scraped off by the adhering matter scraping surfaces 133 and 134 of the movable-side scraper piece 127.

  As shown in FIGS. 19 and 20, the posture changing mechanism 128 slides in the front-rear direction via an operating arm 135 linked to the planting drive mechanism 80 and an operating rod 136 attached to the tip of the operating arm 135. It includes a front / rear sliding piece 137 that is movably linked, and a support arm 138 that is linked to the tip of the front / rear sliding piece 137. The support arm 138 pivotally supports the base end portion on a pivot shaft 139 whose axis is directed in the vertical direction, extends the front end portion 140 forward and bends back in a folded manner, and moves the front end portion 140 to the movable side scraper. A piece 127 is attached. 141 is formed by projecting leftward from the base end of the support arm 138 and connected to the front end of the front and rear sliding piece 137, and 142 is formed by projecting rightward from the base end of the support arm 138. 143 is a tension spring for biasing the use posture, and 144 is a connecting pin.

  In this way, the posture changing mechanism 128 is elastically biased by the tension spring 143 so that the movable-side scraper piece 127 takes the usage posture (A). The front / rear sliding piece 137 is slid forward by the operating arm 135 against the elastic biasing force of the tension spring 143 so that the non-use posture (b) is taken.

[Film cutting part 32]
As shown in FIGS. 1 and 4, the film cutting part 32 is formed by partially cutting a portion of the multi-film M that becomes a transplanted part immediately before transplanting the seedling N into the heel U by the transplanting part 31. 145 is formed, and the seedling N is transplanted into the heel U through the opening 145.

  That is, the film cutting part 32 attaches the cutting part main body 147 to the rear extension part 22a of the lower support frame forming body 22 via the mounting bracket 146, and the cutting part main body 147 is on the side of the traveling direction from the transplanting claws 81, 81. A disc-shaped cut body 148 is disposed in front of the multi-film M so as to be able to advance and retreat, and the cut body 148 is advanced and retracted by the operating body 150. Reference numeral 151 denotes a rotating cam having an arcuate cam surface 152 and a notch-shaped cam surface 153 formed on the outer peripheral surface. And rotate together. The cam surfaces 152 and 153 of the rotating rotary cam 151 swing the operating body 150 so that the operating body 150 moves the cutting body 148 forward and backward.

  The cutting body 148 is formed in a serrated shape at the peripheral edge so that it can roll around an axis that is substantially perpendicular to the traveling direction, and is advanced into the transplanting site in the field to enter into the resistance of the multi-film M. The multi-film M is partially cut while rolling in the traveling direction against this.

A Seedling transplanter 30 Seedling transport unit 31 Transplanting unit 32 Film cutting unit

Claims (3)

A seedling transport line for transporting the seedling stalks in a substantially horizontal state is formed, and a pair of rollers for operating the tip portions of the pair of transplanting claws in the clamping direction is disposed immediately below the terminal end of the seedling transporting line. Then, the stem part of the seedling is clamped by passing the tip part of the pair of transplanting claws between the pair of rollers, and the transplanting nail is retracted from the advancing direction side in a state where the stem part of the seedling is clamped by both sandwiching bodies. It is a seedling transplanting machine that moves downward in the direction side, inserts the stem into the field and transplants it,
The seedling transplanter characterized in that the roller located on the seedling transport line side is arranged at a lower position than the seedling transport line.   The other roller that closes the tip of the transplanting claw before the roller located on the seedling transport line side is arranged outside the roller located on the seedling transport line side by a certain width from the virtual center line in the left-right direction. Then, the tip contact position of the transplantation claw that contacts the upper peripheral surface of the other roller is positioned inward by a certain width from the imaginary line vertical line passing through the center of the roller. The seedling transplanter according to claim 1.   The seedling guide body which guides the base end part of the stem part of the seedling conveyed by a seedling conveyance line was attached to the vicinity position of the roller located in the seedling conveyance line side. Seedling transplanter.

Images