JP5684611B2 - Seedling transplanter - Google Patents

Description

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

  Conventionally, there exists what was disclosed by patent document 1 as one form of a seedling transplanter. That is, in Patent Document 1, a sweet potato seedling machine as a seedling transplanter is transplanted with a vine-shaped sweet potato seedling stalk sandwiched between a pair of transplanting claws and a stem part inserted into a vine in a field. What has been made to be disclosed is disclosed. Such a sweet potato cutting seedling machine is provided with a seedling transporting section for transporting the sweet potato seedling to a seedling passing position for passing to the transplanting nail.

  That is, the seedling transport unit is configured by attaching a large number of seedling holder bodies at intervals in the extending direction of the transport belt on the surface of the endless belt-shaped transport belt that is hung in a substantially inverted triangle shape in rear view. The stalk of one sweet potato seedling is held between the body. Then, a one-way clutch portion is provided on the drive shaft for driving the conveyor belt, and the driving force is intermittently transmitted to the drive shaft via the one-way clutch portion, thereby causing the conveyor belt to be intermittently conveyed and Is transferred to the seedling inheriting position where the pair of transplanting claws inherits.

JP2011-99A

  However, if the conveying belt is intermittently conveyed at high speed to improve seedling transplanting efficiency, that is, if the driving force is transmitted to the driving shaft at high speed via the one-way clutch, the one-way clutch is inertial. In some cases, the belt rotates excessively beyond a predetermined rotation angle due to the force, and the conveyor belt may overrun via the drive shaft. In that case, the inheritance position of the seedling was changed, and an inheritance error of the sweet potato seedling sometimes occurred.

  Then, an object of this invention is to provide the seedling transplanter which can suppress the overrun of a conveyance belt.

The seedling transplanting machine according to the invention of claim 1 intermittently operates the endless belt-shaped transport belt provided with a large number of seedling holders to transport the seedlings held in the seedling holder to a predetermined position, A seedling transplanter that transplants seedlings into a field by transplanting nails,
An intermittent conveyance operation mechanism is interlocked and connected to the drive shaft that drives the conveyance belt via a one-way clutch, and the intermittent conveyance operation mechanism can intermittently convey the conveyance belt. In the seedling transplanting machine that interlocked and connected the regulating mechanism that regulates excessive rotation of the drive shaft ,
The restricting mechanism includes a single engaging body that has a front end engaging portion at an upper end portion thereof and that moves forward and backward, and an interlocking connecting body that interlocks and connects the engaging body to the intermittent transport operating mechanism, and the intermittent transport operation. While interlocking the intermittent conveyance operation of the mechanism and the advance operation of the engagement body,
A drive roller for supporting the transport belt is provided on the drive shaft, and a plurality of engagement protrusions are provided on the outer end surface of the drive roller at intervals in the circumferential direction for each rotational drive pitch for intermittent transport operation of the transport belt. , And a plurality of engagement protrusions are engaged with engagement holes formed on the side edges of the conveyance belt, so that the rotation operation of the drive roller and the conveyance belt intermittently for each rotation drive pitch. Linked to the proper transport operation,
The rotation operation for each rotation drive pitch of the drive roller, the advancement operation of the engagement body to the engagement projecting piece that is rotationally moved along with the rotation operation, and the engagement operation of the tip engagement portion are interlocked .

  In such a seedling transplanting machine, since the regulating mechanism unit interlocked with the intermittent conveyance operation mechanism regulates excessive rotation of the drive shaft, the one-way clutch unit regulates excessive rotation beyond a predetermined rotation angle due to inertial force. be able to. Therefore, the intermittent rotation stop operation can be solidified and the overrun of the conveyor belt can be suppressed.

In addition, since the rotation operation for each rotation driving pitch of the driving roller, the operation of advancing the engaging body to the engaging protrusion that is rotated and moved in association therewith, and the engaging operation of the tip engaging portion thereof are interlocked. It is possible to firmly restrict the drive roller from rotating excessively by engaging the front end engaging portion of the upper end portion of the single engaging body with the mating piece. At this time, the engaging protrusion is for engaging the conveyance belt with the driving roller, and the engaging protrusion is engaged effectively with the engaging protrusion at the tip engaging portion of the engaging body. Therefore, the restricting mechanism portion can have a compact structure, and the restricting function can be secured satisfactorily.

A seedling transplanting machine according to a second aspect of the present invention is the seedling transplanting machine according to the first aspect of the present invention, wherein the engaging body is configured to vertically move the engagement main piece and the adjustment support piece formed by extending vertically. The slide position can be freely adjusted in the direction.
The adjustment support piece pivotally supports the middle part thereof, and the tip of the engagement main piece that is slidably adjustable to the adjustment support piece is engaged with the engagement protrusion so as to be engaged and disengaged. The engaging portion is integrally formed .

The seedling transplanting machine according to the present invention as set forth in claim 3 is the seedling transplanting machine according to the present invention as set forth in claim 1 or 2 , wherein the intermittent transport operating mechanism repeatedly performs a transport operation and a return operation, The belt can be transported intermittently, and the return operation of the intermittent transport mechanism is interlocked with the retracting operation of the engaging body of the restricting mechanism portion from the engaging protrusion and the disengaging operation of the tip engaging portion. It was made to be characterized.

  In such a seedling transplanter, the return operation of the intermittent transfer operation mechanism, the retracting operation of the engaging body of the restricting mechanism portion from the engaging protrusion, and the disengaging operation of the tip engaging portion thereof are interlocked. The intermittent conveying operation of the conveying belt when the operating mechanism performs the conveying operation can be made smooth and steady. As a result, even when the intermittent conveying operation of the conveying belt is performed at a high speed, the conveying operation can be ensured satisfactorily, and the transplanting work efficiency can be improved.

  The present invention has the following effects. In other words, in the present invention, even when the speed of the transport belt is increased in order to improve seedling transplanting efficiency, the intermittent rotation stopping operation of the one-way clutch unit is solidified to suppress the overrun of the transport belt. be able to. Therefore, the seedling transfer position can be secured satisfactorily, and the seedling transfer is performed firmly. As a result, seedling transplanting efficiency can be improved.

Side surface explanatory drawing of the seedling transplanting machine which concerns on embodiment of 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. The top view of the stand-by posture of a seedling holder body. Plane explanatory drawing of a control mechanism part. Side surface explanatory drawing of a control mechanism part. The back explanatory drawing of a forced clamping action body. Plane explanatory drawing of a preliminary seedling stage. Side surface explanatory drawing of a preliminary seedling mounting stand.

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

  A shown in FIGS. 1 and 2 is a seedling transplanting machine, and the seedling transplanting machine A is, as shown in FIGS. 1 and 2, a front portion of a body frame 1 formed in a rectangular frame shape extending in the front-rear direction. The engine 2 is mounted on the rear, and the lower part of the vertically long transmission case 3 is attached to the rear end of the aircraft frame 1, and the transmission case 3 and the engine 2 are interlocked and connected via the interlocking case 4. Yes. 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 ends 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. The upper end of the rear case 11 is interlocked to the lower end of the transmission case 10, and the upper end of the rear case 11 is linked to the lower end of the transmission case 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.

  In FIG. 1, reference numeral 13 denotes a lift sensor mechanism. The lift sensor mechanism 13 is provided with a sensing roller 13 a that senses while rolling the upper surface of the basket U, and the body is automatically moved by the lift mechanism 12 based on the sensing result of the sensing roller 13 a. Therefore, the depth of seedling planting (transplanting) described later can be kept substantially constant. Reference numeral 14 denotes a preliminary seedling stage, and the preliminary seedling stage 14 is a stage for preliminarily placing a vine-like seedling N such as a sweet potato seedling. Reference numeral 25 denotes an elevating / planting lever that also serves as an elevating lever for the machine and a lever for connecting / disconnecting the planting clutch, 26 is a traveling speed change lever, and 27 is a stock adjustment handle. 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. Reference numeral 34 denotes a pressure reducing roller. 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. 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.

  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.

  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 facing 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 as an engaging protrusion projecting radially from the end face of the roller 46 on the upper right side. In the embodiment, 6) are equally spaced. 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 pin 49 is inserted into the engagement pin 49. 48 is engaged so that the conveyor 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 denotes a rotating body attached to the left upper roller support shaft 43. The misalignment preventing protrusion strip 50 is engaged with the formed concave strip portion to prevent 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. 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 conveying belt 40 is predetermined. Are conveyed at every rotation driving pitch (in this embodiment, the interval between the engaging pin 48 and the engaging hole 49 is one pitch, and every two pitches).

  As shown in FIGS. 5 to 7, the drive mechanism 57 includes a swinging mechanism portion 58 and a rotation mechanism portion 59 as an intermittent transport operation mechanism.

  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 is configured to rotatably fit a boss portion 65 to a rear end portion of the right upper roller support shaft 44 serving as a drive shaft, and a rear end surface of the boss portion 65. The drive sprocket 66 is coaxially connected to the front. A ratchet mechanism 67 serving as a one-way clutch is interposed between the boss 65 and the rear end of the right upper roller support shaft 44. The ratchet mechanism 67, as shown in FIGS. 9 and 10, allows the ratchet body 67a fitted and attached to the right upper roller support shaft 44 and the ratchet body 67a to rotate only in one direction and in the other direction. And a regulating body 67b that regulates rotation. In the present embodiment, the regulating body 67b can be moved forward and backward with respect to the ratchet body 67a, and the regulating body 67b allows the rotation of the ratchet body 67a by one third only in the clockwise direction shown in FIG. The rotation of the ratchet body 67a is restricted.

  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 support 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, 68c and 68d are tension springs, and 68e is a connecting pin. 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.

  With this configuration, when the disc 62 is rotated in conjunction with the first drive shaft 56, the connecting link 63 connected to the peripheral portion of the disc 62 slides back and forth in the front-rear direction, and the swing lever The front end portion of the leftward extending piece 60a formed on the body 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.

  As shown in FIGS. 9 and 10, a restricting mechanism 90 that restricts excessive rotation of the right upper roller support shaft 44 as a drive shaft is linked to the turning mechanism 59. That is, the restriction mechanism 90 includes an engaging body 92 that moves forward and backward by making the tip engaging portion 91 a hook shape, and an interlocking connecting body 93 that interlocks and connects the engaging body 92 to the swing lever body 60. The restriction mechanism 90 and the rotation mechanism 59 are interlocked with the swinging movement of the swing lever body 60.

  The engagement body 92 is configured by attaching an engagement main piece 96 and an adjustment support piece 97 formed by extending in the vertical direction so that the slide position can be adjusted in the vertical direction. The adjustment support piece 97 is swingable in the left-right direction via a support piece swing support shaft 95 whose axis is directed in the front-rear direction to a support piece 94 whose middle part is suspended from the right side of the left-right extension 42b. It is pivotally supported. A tip engagement portion 91 that engages with and disengages from the engagement pin 48 is integrally formed at the upper end portion of the engagement piece 96 that is attached to the adjustment support piece 97 so that the slide position can be adjusted.

  Further, the interlocking connection body 93 includes an interlocking connection piece 100 that extends in the left-right direction and can be freely expanded and contracted, and an advancing side as an elastic biasing body in which the left end is connected to the right end of the interlocking connection piece 100. An urging spring 101 and a retreat-side urging spring 103 as an elastic urging member interposed between an upper end portion of the adjustment support piece 97 and a locking bracket 102 provided in the laterally extending portion 42b are formed. Yes. The interlocking connecting piece 100 is provided on the swinging mechanism portion 58 via the connecting pin 104, and the left end portion is connected to the base end portion of the upper extending piece 60b. The right end of the advancing biasing spring 101 is connected to the lower end of the adjustment support piece 97.

  With this configuration, in conjunction with the swing operation of the swing mechanism portion 58, the transport operation of the rotation mechanism portion 59 and the advancement operation of the engagement body 92 are interlocked, and the return operation of the rotation mechanism portion 59 is performed. And the retracting operation of the engaging body 92 are interlocked. That is, the rotation mechanism 59 engages the engagement pin 48 protruding from the outer end face of the rollers 46 and 46 with the engagement hole 49, thereby intermittently rotating the rollers 46 and 46 for each rotation drive pitch. The operation and the intermittent conveyance operation of the conveyance belt 40 are interlocked. Then, the restricting mechanism 90 rotates at each rotation driving pitch of the rollers 46 and 46, and the engaging body 92 advances to the engaging pin 48 in the middle of the left side that is rotated accordingly (the timepiece in FIG. 10). Oscillating movement) and the engaging operation of the tip engaging portion 91 are interlocked.

  At this time, since the restricting mechanism 90 interlocked with the turning mechanism 59 restricts excessive rotation of the roller 46, that is, the right upper roller support shaft 44 via the engagement pin 48, the ratchet mechanism 67 The inertial force restricts the rotation more than a predetermined rotation angle (two pitches). Therefore, the intermittent rotation stop operation can be made solid, and the overrun of the conveyor belt 40 can be suppressed.

  In this way, by engaging the tip engaging portion 91 of the engaging body 92 with the engaging pin 48, it is possible to firmly restrict the roller 46 from rotating excessively. At this time, the engagement pin 48 engages the conveyance belt 40 with the roller 46, and the engagement pin 48 is effectively used to engage the end engagement portion 91 of the engagement body 92 with the engagement pin 48. As a result, the restriction mechanism 90 can have a compact structure, and a good restriction function can be ensured.

  Further, the returning operation of the engaging mechanism 92 from the engaging pin 48 by the returning operation of the rotating mechanism 59 and the elastic biasing force of the retracting biasing spring 103 provided in the regulating mechanism 90 (counterclockwise swinging in FIG. 10). Motion) and the disengagement operation of the tip engaging portion 91 are interlocked.

  Therefore, the intermittent conveyance operation of the conveyance belt 40 when the rotation mechanism unit 59 performs the conveyance operation can be made smooth and solid. As a result, even when the intermittent conveying operation of the conveying belt 40 is performed at a high speed, the conveying operation can be ensured satisfactorily, and the transplanting work efficiency can be improved.

  As shown in FIG. 8, the seedling holder body 41 has a rectangular plate-like substrate piece 71 fixed to the upper rear edge of the conveyor belt 40 and a fixed portion formed by rising upward from the right edge of the substrate piece 71. A side holder forming piece 72 and a movable side holder forming piece 73 pivotably supported at the left edge of the substrate piece 71 are provided. The movable-side holder forming piece 73 is in a holding posture (Fa) in which the stem k of the seedling N is held close to the fixed-side holder forming piece 72 and in a standby posture in which the movable-side holder forming piece 73 is separated from the fixed-side holder forming piece 72 and waits. The posture can be freely changed between (Fb).

  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 forcibly clamped by the forced clamping action body 82. It is made to operate. 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.

  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. 10, the forcible clamping action body 82 forcibly operates the distal ends 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.

  Then, the forcible clamping action body 82 is disposed on the rising part 22b of the lower support frame forming body 22 shown in FIG. 3 with the left action part 110 and the right action part 120 facing each other in the left-right direction, as shown in FIG. doing. The left and right action portions 110 and 120 pivotally support the boss portions 112 and 122 via the pivots 111 and 121 whose axes are directed in the front-rear direction to the rising portion 22b, and are connected to the upper portion of the boss portions 112 and 122. The pieces 113 and 123 are projected, and the roller support arms 114 and 124 are suspended downward from the boss portions 112 and 122. Nipping action rollers 116 and 126 are pivotally supported at the front end portions of the roller support arms 114 and 124 via roller support shafts 115 and 125 having axial lines directed in the front-rear direction. 117 and 127 are support brackets connected to the rising portion 22b, 118 and 128 are claw closing side urging springs interposed between the support brackets 117 and 127 and the connecting projections 113 and 123, and 119 and 129 are advanced and retracted. Type arm stopper.

  By configuring the forced clamping action body 82 as described above, the transplanting claws 81 and 81 can be opened and closed smoothly, the seedling inheritance position is stabilized, and the planting accuracy is improved. Eliminates malfunction and friction due to sand biting. Depending on the thickness and variety of the seedling, it can be adjusted so that the seedling can be pinched at the optimum position of the transplanting claws 81 and 81. The load by which the transplanted claws 81 and 81 pinch the seedling can be adjusted according to the variety and size of the seedling. Decreasing the seedling breakage and stem cracking can be reduced if it is weakened. Can do.

  As shown in FIGS. 3, 12, and 13, the preliminary seedling stage 14 is constructed on a pair of left and right tank support frames 33 and 33. The preliminary seedling stage 14 has left and right case support frames 132, 133 attached to a pair of front and rear slide support rods 130, 131 extending in the left-right direction so as to be slidable in the left-right direction. On the left and right case support frames 132 and 133, preliminary seedling storage cases 134 and 135 are placed, respectively. A rising piece 136 is attached to the central portion of the rear slide support rod 131, and base ends of the sticks 137 and 137 extending substantially horizontally in the horizontal direction are connected to the upper end of the rising piece 136, respectively. .

  By configuring in this way, it is possible to place the spreading rods 137, 137 above the rear portions of the preliminary seedling storage cases 134, 135 and place the middle part of the stem of the seedling bundle on the spreading rods 137, 137. it can. Therefore, the spare seedling N can be lightly floated, and the foliage is less likely to get entangled. Since the leaves always face downward, it is possible to save the trouble of adjusting the orientation of the seedling N downward when setting the seedling N in the seedling holder body 41. Since the end of the stalk of the seedling N can be pulled to the front and set as it is in the seedling holder body 41, the work efficiency is improved. The operator can perform the seedling setting at the optimum position in accordance with the decrease of the seedling N on the spreading rods 137, 137, so that the work efficiency is stabilized.

A Seedling transplanter 30 Seedling transport part 57 Drive mechanism 58 Swing mechanism part 59 Rotation mechanism part 90 Restriction mechanism part

Claims (3)

A seedling transplanter that intermittently transports an endless belt-shaped transport belt provided with a large number of seedling holders to transport the seedlings held in the seedling holder to a predetermined position and transplants the seedlings to the field by transplanting claws. There,
An intermittent conveyance operation mechanism is interlocked and connected to the drive shaft that drives the conveyance belt via a one-way clutch, and the intermittent conveyance operation mechanism can intermittently convey the conveyance belt. In the seedling transplanting machine that interlocked and connected the regulating mechanism that regulates excessive rotation of the drive shaft ,
The restricting mechanism includes a single engaging body that has a front end engaging portion at an upper end portion thereof and that moves forward and backward, and an interlocking connecting body that interlocks and connects the engaging body to the intermittent transport operating mechanism, and the intermittent transport operation. While interlocking the intermittent conveyance operation of the mechanism and the advance operation of the engagement body,
A drive roller for supporting the transport belt is provided on the drive shaft, and a plurality of engagement protrusions are provided on the outer end surface of the drive roller at intervals in the circumferential direction for each rotational drive pitch for intermittent transport operation of the transport belt. , And a plurality of engagement protrusions are engaged with engagement holes formed on the side edges of the conveyance belt, so that the rotation operation of the drive roller and the conveyance belt intermittently for each rotation drive pitch. Linked to the proper transport operation,
A seedling characterized in that the rotation operation for each rotation drive pitch of the drive roller, the advancement operation of the engagement body to the engagement protrusion that is rotated and moved in association therewith, and the engagement operation of the tip engagement portion thereof are interlocked. Transplanter. The engagement body is configured by attaching an engagement main piece formed by extending in the vertical direction and an adjustment support piece so that the slide position can be adjusted in the vertical direction.
The adjustment support piece pivotally supports the middle part thereof, and the tip of the engagement main piece that is slidably adjustable to the adjustment support piece is engaged with the engagement protrusion so as to be engaged and disengaged. The seedling transplanter according to claim 1, wherein the engaging portion is integrally formed . The intermittent transport operation mechanism repeatedly performs a transport operation and a return operation to enable the transport operation of the transport belt intermittently. The seedling transplanting machine according to claim 1 or 2 , wherein the retracting operation of the engaging body and the disengaging operation of the tip engaging portion are interlocked.

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