JP4370671B2 - Seedling transplanter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a seedling transplanter that transplants seedlings such as onions into a field.
[0002]
[Prior art]
  Conventionally, in a seedling transplanting machine provided with a pair of left and right planting discs that convey the leaf stem portion of the seedling from the left and right to the field, the place where the left and right planting discs contact each other was fixedly provided .
[0003]
[Problems to be solved by the invention]
  In the conventional seedling transplanting machine described above, the left and right planting disks are provided so as to contact each other from the setting location where the seedling is supplied to the vicinity of the lower end of the disc, and the left and right planting discs contact each other at the setting location. At the beginning, the leaf stem part of the seedling is supplied, the left and right planting discs sandwich the supplied stem part of the seedling and transport it downward, and when the sandwiched seedling comes near the bottom end, the right and left planting The discs are separated from each other and the seedlings are released, and the seedlings are transplanted into the field. Here, as described above, if the place where the right and left planting disks touch each other is fixedly provided and the position cannot be adjusted, seedlings may not be planted properly.
[0004]
  That is, the thickness of the leaf stems of the seedling changes depending on the length of the seedling, but if the leaf stems of the seedling supplied to the planting disc are thicker or thinner than usual, The situation changes when the disc releases the seedling. For example, if the leaf stem portion of the seedling is thick, the state where the right and left planting discs still hold the leaf stem portion of the seedling continues after the sandwiched seedling is conveyed to the lowermost end, and the seedling is lifted. For this reason, if the root part of the seedling is lifted to near the ground surface and the planting groove is backfilled in the meantime, the root part of the seedling will float on the ground surface and the seedling will fall to the ground surface. It will be in a state where it is placed. If this happens, the seedlings will not settle, resulting in a decrease in the yield. Further, if the leaf stem portion of the seedling is thin, the seedling sandwiched between the planting disks is released from the left and right planting disks before being transported to the lowest end. For this reason, since the covering of the seedlings released to the field is delayed, the seedlings fall down in the planting groove, and if the seedlings are covered after they fall down, the seedlings will fall down and be planted. is there. If it becomes like this, onions etc. which will be balled in the state which came out on the ground will become easy to grow, and onion etc. which will be harvested will change, and will cause the quality of a harvest to fall.
[0005]
  Then, even if the leaf stem part of a seedling is thick or thin, this invention makes it a subject to make it easy to adjust so that it may be planted correctly.
[0006]
[Means for Solving the Problems]
  In order to solve the above problems, the present invention is configured as follows.
  The invention according to claim 1 is a seedling transplanting machine provided with a pair of left and right planting disks 34a and 34a that conveys a leaf stem portion of a seedling from the left and right to the field, and the left and right planting disks 34a and 34a are mutually connected. A contact point H is provided so that it can be rotated around the center of rotation of the planting disks 34a, 34a.The portion H where the left and right planting disks 34a and 34a contact each other is configured to be closer to the front side with respect to the rotation center of the planting disks 34a and 34a, and the left and right planting disks 34a and 34a are in contact with each other. The operation tool L for rotating the corresponding part H around the rotation center of the planting disks 34a, 34a is operated by rotating the lever extending to the rear side of the planting disks 34a, 34a up and down.The seedling transplanter was characterized by this.
[0007]
  The invention according to claim 2A seedling transplanting device 4 is mounted on the rear part of the agricultural tractor 2 so as to be movable up and down to constitute a seedling transplanting machine. 78, a support frame attaching portion 77a protruding upward at the front portion of the support frame 77 is rotatably attached, and the support frame 77 on the rear side of the horizontal shaft 78 is branched to the left and right to extend rearward. Rotating shaft 34c is provided on 77b and 77b so as to be rotatable, and disc supporting bosses 34d and 34d having planting disks 34a and 34a rotatably mounted on the outer periphery are provided between left and right support frame rear portions 77b and 77b of rotating shaft 34c. The disc supporting bosses 34d and 34d are provided so as to be fitted and rotate integrally with the rotating shaft 34c. The planting disk so that the rotation centers 34aC and 34aC are located on the rotation axis 34cS of the rotation shaft 34c, and the front lower peripheral portions of the left and right planting disks 34a and 34a are in contact with each other. The shaft holes 34f, 34f are formed so that the rotation axis 34aS, 34aS of 34a, 34a obliquely intersects the rotation axis 34cS of the rotation shaft 34c, and the lever is integrally rotated at one end of the rotation shaft 34c. The lever is engaged with one of the lever engaging portions 34j provided at a plurality of positions of the lever support member 34i fixed to the left and right support frame rear portions 77b to stop the rotation of the rotating shaft 34c.A seedling transplanter according to claim 1, wherein the seedling transplanter is provided.
[0008]
[0009]
[Action]
  In the first aspect of the present invention, the pair of right and left planting disks 34a, 34a convey the seedling by conveying it to the field with the leaf stem portion of the seedling sandwiched from the left and right. Further, the portion H where the right and left planting disks 34a and 34a contact each other is rotated around the rotation center of the planting disks 34a and 34a.ThenThe position E where the right and left planting disks 34a and 34a are separated from each other to release seedlings is repositioned in the rotational direction of the planting disks 34a and 34a or in the opposite direction.
[0010]
  For example, when the stems of seedlings supplied to the planting disks 34a and 34a are thick, the place H where the left and right planting disks 34a and 34a touch each other is the direction opposite to the rotation direction of the planting disks 34a and 34a. Rotate the left and right planting disks 34a, 34a away from each other to release the seedling, and the position E is changed in the direction opposite to the rotation direction of the planting disks 34a, 34a, and the seedling is lifted. Can be adjusted so that there is no. Further, when the stems of seedlings supplied to the planting disks 34a and 34a are thin, the planting disks 34a and 34a are rotated in the rotation direction at the place H where the left and right planting disks 34a and 34a contact each other. By doing so, the position E where the left and right planting disks 34a, 34a are separated from each other to release the seedling can be adjusted so that the planting disks 34a, 34a are repositioned in the rotational direction and the seedling does not fall.
[0011]
  Further, the left and right planting disks 34a, 34a are in contact with each other at the front side with respect to the rotation center, while the rear side with respect to the rotation center is separated from each other left and right, and the planting disks 34a, 34a When operating the operation tool L configured to rotate the lever extended to the rear side up and down, it can be operated while checking the position of the place where the right and left planting disks 34a and 34a contact each other. It becomes.
  Since the place H where the left and right planting disks 34a, 34a contact each other is rotated around the center of rotation of the planting disks 34a, 34a, the position of the entire planting disks 34a, 34a cannot be changed vertically. Therefore, the planting depth of the seedling does not fluctuate with the rotation operation.
[0012]
  In invention of Claim 2,In addition to the operation of the first aspect of the invention, when the lever is rotated in the rotation direction of the rotary shaft 34c, the disk support bosses 34d and 34d rotate around the rotation centers 34aC and 34aC of the planting disks 34a and 34a. As a result, the contact point H of the right and left planting disks 34a, 34a rotates in the rotation direction. The contact point H is set to an appropriate position, and the lever is engaged with one of the lever engaging portions 34j of the lever support member 34i at that position so that the rotating shaft 34c does not rotate.
[0013]
[0014]
【The invention's effect】
  According to the invention of claim 1, according to the thickness of the leaf stem portion of the seedling, the right and left planting disks 34a, 34a can be operated to adjust the location E where the seedling is released away from each other to an appropriate position, Since the planting depth of the seedling is not changed by the adjusting operation, it can be easily adjusted so that the seedling can be planted properly, and the left and right planting disks 34a and 34a are in contact with each other. Is rotated around the center of rotation of the planting disks 34a, 34a, so that the operation mechanism can be easily simplified.
  Further, since the operation tool L is configured to be operated by vertically turning a lever extending to the rear side of the planting disks 34a, 34a, when operating the operation tool L from the rear of the planting disks 34a, 34a, The position of the location H where the left and right planting disks 34a, 34a contact each other can be easily confirmed, and an appropriate adjustment operation can be performed.
[0015]
  According to invention of Claim 2,In addition to the effect of the first aspect of the invention, when the lever is rotated in the rotation direction of the rotation shaft 34c, the disk support bosses 34d and 34d rotate around the rotation centers 34aC and 34aC of the planting disks 34a and 34a. As a result, the contact point H of the right and left planting disks 34a, 34a rotates in the rotation direction. Then, the contact point H can be set to an appropriate position, and the lever can be engaged with one of the lever engaging portions 34j of the lever support member 34i at that position so that the rotating shaft 34c does not rotate. .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
  A seedling transplanting machine for carrying out the present invention is a seedling transplanting machine configured to transplant a seedling by transporting it to a field by sandwiching a leaf stem portion of the seedling from the left and right by a pair of right and left planting disks, for example, an onion seedling However, it may be a seedling transplanting machine for transplanting seedlings of other crops. Moreover, it is good also as a walking type seedling transplanter or a riding type seedling transplanter as described below. Furthermore, it is possible to use a semi-automatic type seedling transplanter in which the operator manually removes seedlings to be supplied from the seedling box, or automatically removes seedlings from the seedling box as described below into the planting disk. It can also be used as a fully automatic seedling transplanter. Hereinafter, a seedling transplanting machine for transplanting onion seedlings will be described as a preferred embodiment of the present invention.
[0017]
  In the seedling transplanting machine 1, the seedling transplanting device 4 mounted on the three-point link mechanism 3 provided at the rear part of the agricultural tractor 2 so as to be movable up and down is pulled by the tractor 2 and moves on the ground, and is transmitted from the tractor 2. Each actuating part is driven by the motive power.
[0018]
  The tractor 2 includes a pair of left and right front wheels 5 and 5 that are driven and rotated, and a pair of left and right rear wheels 6 and 6 that are driven and rotated, a control seat 7 on which a driver is seated, and front wheels 5 and 5 that are steering wheels. A steering handle 8 for performing a steering operation for changing the left and right directions is provided in front of the steering seat 7 to constitute a riding type traveling vehicle body. The tractor 2 has seedling frames 10, 10; 11, 11 on which the seedlings to be supplied to the seedling transplanting device 4 are placed on both the left and right sides of the front and rear sides of the vehicle body. Yes. Further, an automatic steering device 12 is provided for automatic steering during seedling transplanting work.
[0019]
  As shown in FIGS. 1, 21, and 22, the automatic steering device 12 swings such that the front end side is swingable left and right, with the vertical axis 14 a provided at the front left and right center lower part of the machine body as a rotation fulcrum. An arm 14 is attached, and a guide wheel support arm 15 is attached to the front end portion of the swing arm 14 so that the tip end side thereof can be pivoted up and down. As an engaging body for the guide groove G1 at the tip portion of the guide wheel support arm 15 The guide wheel 16 is rotatably supported, and an auxiliary guide body 16a is attached to the rear side thereof. The vertical axis 19 fixed to the swing arm 14 is rotatably connected to a connecting fitting 20 attached to the left and right center portion of the tie rod 19 that connects the left and right front wheels 5 and 5 so as to be steered together. Thus, the tie rod 19 moves left and right as the swing arm 14 moves left and right. The tie rod 19 is connected to the arms 22 and 22 fixed to the left and right front wheel support cases 21 and 21 that support the front wheels 5 and 5 so as to be rotatable left and right. As a result, the front wheels 5 and 5 are steered in association with the movement of the guide wheels 16 in the direction intersecting the aircraft traveling direction.
[0020]
  Since the auxiliary guide body 16a is provided in the vicinity of the rear of the guide wheel 16, the guide wheel 16 and the auxiliary guide body 16a are engaged in the front and rear with the guide groove G1, so that the guide wheel 16 is detached from the guide groove G1. Wheels are less likely to occur, and automatic steering accuracy is improved.
[0021]
  Further, the guide wheel support arm 15 is connected to a lift arm 25 that lifts and lowers the seedling transplanting device 4 via the wire 24, and when the seedling transplanting device 4 is raised, the guide wheel support arm 15 rises and the guide wheel 16 rises. When the seedling transplanting device 4 is lowered, the guide wheel support arm 15 is lowered so that the guide wheel 16 comes into contact with the ground.
[0022]
  At the time of seedling transplanting operation, the guide wheel 16 comes into contact with the ground, and the guide wheel 16 is guided along the guide groove G1 formed in the topsoil of the field by a guide groove forming disk 47 described later. When the course of the aircraft is shifted to the left and right with respect to the guide groove G1, the guide wheel 16 moves in a direction crossing the traveling direction, and the movement is transmitted to the tie rod 19 so that the aircraft course matches the guide groove G1. , 5 is steered. For this reason, it is possible to perform a hand-off operation at the time of seedling transplanting work, and the seedling is supplied to the seedling transplanting apparatus 4 from the seedling frames 10, 10; 11, 11 without stopping the traveling of the tractor 1 and interrupting the seedling transplanting work. Work efficiency can be improved. When the seedling transplanting device 4 is raised at the time of turning the machine body, the guide wheel 16 is raised in conjunction with it, and the automatic steering is released.
[0023]
  By the way, the left and right movements of the tie rod 19 and the left and right rotation of the front ends of the front wheels 5 and 5 are connected to operate in the same direction. Here, the arms 22, 22 protrude from the left and right front wheel support cases 21, 21 to the front side, and both front ends of the arms 22, 22 are connected by tie rods 19. A vertical axis 14a serving as a left / right pivot point of the swing arm 14 is disposed behind the tie rod 19 connected in this manner. Thus, when the traveling position of the tractor 1 is shifted to the left and right and the guide wheel 16 disposed in front of the front wheels 5 and 5 moves to the left and right with respect to the tractor 1, the swing arm 14, the tie rod 19 and the left and right front wheels 5 and 5 are Both are rotated in a direction to correct the shift of the travel position of the tractor 1, and the connection structure between the operation member that moves to the left and right together with the guide wheel 16 and the steering operation system of the front wheels 5, 5 can be simplified.
[0024]
  For example, the arm length from the vertical axis 14 a serving as the left and right pivot point of the swing arm 14 to the vertical axis 18 serving as the connection point with the tie rod 19, and the tie rod 19 and arm 22 from the pivot center of the front wheels 5 and 5. , 22 is set to the same or substantially the same arm length, so that the direction in which the swing arm 14 extends and the direction in which the left and right front wheels 5, 5 face are the same. Setting the position of the vertical axis 14a serving as the connecting point of the tie rod 19 and the position of the vertical axis 14a serving as the left / right rotation fulcrum provides the following effects. That is, when the travel position of the tractor 1 is shifted to the left or right, the left and right front wheels 5 and 5 are automatically steered in the direction in which the guide wheel 16 is located, and the position of the guide wheel 16 is indicated as an index. The amount of movement is the same as the amount of steering operation during the artificial operation.
[0025]
  Further, as shown in FIG. 22, the arm length L1 from the vertical axis 14a serving as the left and right pivot point of the swing arm 14 to the vertical axis 18 serving as the connection point with the tie rod 19 is the pivot center of the front wheels 5 and 5. For example, by setting the arm length L2 longer than the arm length L2 from the tie rod 19 to the connecting point of the arms 22 and 22, the left and right front wheels 5 and 5 have an angle larger than the angle of the swing arm 14. Setting the position of the vertical axis 14 a serving as a pivot point and the position of the vertical axis 18 serving as a connection point between the tie rods 19 provides the following effects. That is, the longer the arm length L3 from the left / right pivot point of the guide wheel 16 to the guide wheel 16 as an engaging body to the guide groove G1, the more the travel position of the tractor 1 shifts to the left and right, and the swing arm 14 rotates to the left and right. The left and right front wheels 5, 5 can be moved left and right with a light operating force, and the guide groove G1 formed in the soil is less likely to collapse, and the guide wheel 16 can be easily engaged with the guide groove G1. The accuracy of automatic steering is improved. However, as the arm length L3 is longer, the amount of rotation of the swing arm 14 on the rotation fulcrum side becomes smaller, and a simple connection configuration in which the tie rod 19 is connected on the rotation fulcrum side of the swing arm 14 as described above. In the case of a thing, the left-right rotation amount of the front wheels 5 and 5 with respect to the left-right displacement amount of the traveling position of the tractor 1 is small. For this reason, the correction of the left / right shift of the travel position of the tractor 1 is performed slowly and slowly, and there is a problem that the course cannot be corrected quickly. Therefore, by setting as described above, the amount of left and right rotation of the front wheels 5 and 5 with respect to the amount of lateral displacement of the traveling position of the tractor 1 is increased as much as possible while increasing the arm length L3. While maintaining good engagement with G1, the course can be corrected as quickly as possible, and high-precision automatic steering can be performed. Specifically, when L1 is set to be twice or more of L2 and L3 is set to be three times or more of L1, the guide groove G1 formed with the soil in the field is less likely to collapse during automatic steering, and the course is corrected. Can now be done reasonably quickly.
[0026]
  In this seedling transplanter 1, seedlings grown in plastic seedling boxes C having plastic flexibility in which a large number of pots p for growing seedlings one by one are arranged at predetermined intervals are used. The seedling box C is, for example, as shown in FIGS. 23 to 25, in which a plurality of pots p are arranged on the left and right, front and rear, the opening pd of each pot p is connected, and the bottom pa side is formed in an independent form. Has been. The outer peripheral edge of the seedling box C is rectangular in plan view. The seedling box C is molded integrally with a synthetic resin such as polypropylene, and the molded seedling box C has flexibility. Each pot p of the seedling box C has a round cup shape, that is, a shape provided in a cylindrical shape from the circular bottom pa to the upper circular opening pd so that the diameter gradually increases. It has become. Moreover, a hole pb is provided in the bottom part pa of the pot p. The hole p has three holes extending radially from the central hole a, the three peripheral holes b, b, b, and from the central hole a to the three peripheral holes b, b, b. It is assumed that the shape is composed of two slits c, c, c. As a result, a bar as thick as possible can be inserted from the bottom portion p at the time of taking out the seedling while reducing the gap of the bottom portion p. Moreover, the wide part 1e is provided in the center of right and left so that the pot p may be divided into 7 pieces on either side. The left and right edge portions pf and pf along the longitudinal direction of the seedling box C are provided with seedling box feeding square holes pg for transferring the pots p in a row in accordance with the pitch in the longitudinal direction of the pots p. When the seedling box C grown in this seedling box C is loaded into the seedling transplanter and transplantation is performed, the seedling box feeder provided in the transplanter is inserted into the right and left seedling box feed square holes pg and pg. Engage the seedling box C in the longitudinal direction to transfer the pots p in a row.
[0027]
  The seedling transplanting device 4 has a four-row planting configuration in which four seedling planting devices 34 including a pair of left and right planting disks 34, 34a are provided side by side in the left-right direction. Two seedling box transport devices 30 and 30 are provided on the left and right, one for each of the two right and left row of planting disks 34a and 34a, and two seedling boxes C each containing seedlings are loaded into each. The The seedling box C loaded in the seedling box transporting device 30 is transported along a predetermined path, and the seedling N is pushed out from the seedling extrusion pin PP side-by-side pot p at a seedling extraction position PU in the middle of the transporting path. It is. The extruded seedling N is held by the seedling holder 31 and transferred along a trajectory that draws an arc downward and is dropped onto the laterally feeding belts 32 and 32 that are first seedling conveying belts. The seedling N is sent to the left and right sides by the lateral feeding belts 32, 32 by the lateral feeding belts 32, 32, dropped from the left and right outer ends to the vertical feeding belts 33, 33 which are second seedling conveying belts, It is sent downward by the longitudinal feed belts 33 and 33 and supplied to the seedling planting devices 34 and 34 one by one. Then, the seedling planting devices 34 and 34 plant the seedlings N in the planting grooves G2 formed in the topsoil portion of the field by the planting groove forming disks 35 and 35 and the groovers 36 and 36. The planting groove G <b> 2 that has been planted is backfilled by the cover rings 37 and 37.
[0028]
  In addition, in front of the planting groove forming disk 35, a horizontally long roller 40 is provided that suppresses and leveles the field in front of each of the four seedling planting devices 34 where the seedlings are planted.
  In addition, teeth 41 and 41 are provided at the rear of each of the left and right rear wheels 6 and 6 for loosening the wheel marks that have been hardened by passing the left and right rear wheels 6 and 6 of the tractor 2.
[0029]
  Further, the left and right sides of the lower part of the seedling transplanting device 4 including the periphery of the lateral feeding belts 32 and 32 so that the seedlings N placed on the lateral feeding belts 32 and 32 and transported are not disturbed by the wind. Windproof bodies 42, 42 surrounding the rear side are provided. The windproof bodies 42, 42 are configured by windproof nets 44, 44 respectively attached to left and right frame bodies 43, 43 surrounding the left half and the left half, and the left and right windproof bodies 42, 42 are at the left and right front ends. Are attached to support pillars 45, 45 that can be rotated around the longitudinal axis provided on the left and right sides of the lower part of the seedling transplanting device 4, and the left and right windproof bodies 42, 42 are connected to each other by connecting fittings 46 at the rear center. Yes. When repairing and inspecting the seedling transplanting device 4, etc., it can be opened by removing the connecting metal fitting 46 and rotating the left and right windbreakers 42, 42 outward in the left and right directions.
[0030]
  By the way, guide groove forming disks 47 and 47 for forming a guide groove G1 through which the guide wheel 16 passes in the field are attached to support frames 47a and 47a provided to be movable up and down on both the left and right sides of the tractor 2. The guide groove forming disks 47 and 47 are two earthing types in which two disks are provided so that the front side is in contact with each other and the rear side is separated from each other so as to be rotatable in a plan view. In addition, the groove forming bodies 48 and 48 are provided so that the groove formed by the guide groove forming disks 47 and 47 does not return to the right and left so as to ensure the groove forming. The grooved bodies 48, 48 are formed in a substantially V-shaped shape in a rear view with the front end of the lower end portion raised frontward in a side view and the lower end and the front end portion closed. In the upper part, flat plates 48a and 48a are provided as plates that spread left and right and then fall downward, and these flat plates 48a and 48a are left and right by guide groove forming disks 47 and 47 as shown in FIG. The raised soil is pressed down into the grooves 48 and 48 to ensure the formation of the guide groove G1, thereby enabling the automatic steering device 12 to operate more accurately. It is supposed to be. As shown in FIG. 22, the shape of the guide wheel 16 and the auxiliary guide body 16a is the shape of the guide groove G1 having a substantially V-shaped cross section formed by the guide groove forming disks 47 and 47 and the groove forming bodies 48 and 48. It is provided in a shape that just fits. In addition, since the guide groove G1 is formed on the farm scene side to be planted in the next step, the guide groove forming disks 47 and 47 on that side are lowered and the guide groove forming disks 47 and 47 on the opposite side are raised. deep. The raising and lowering operation of the guide groove forming disks 47 and 47 is performed by operating the left and right operation levers 47c and 47c connected to the left and right support frames 47a and 47a via the wires 47b and 47b.
[0031]
  Next, the structure of the principal part of the seedling transplanting device 4 will be described.
  The seedling box transport devices 30 and 30 have a groove for engaging the left and right edges pf and pf of the seedling box C, and guide and transport the seedling box C toward the seedling extraction position PU in a downward descending inclination. 30a, 30a. A single seedling box C can be placed above the transport guide bodies 30a and 30a, and rollers r1 and r2 that sandwich the left and right edges pf and pf of the placed seedling box up and down are provided. The upper roller r1 is supported in a swingable manner and is urged in a direction in contact with the lower roller r2 by an urging body such as a spring. The lower roller r2 is connected to the electric motor M and is driven electrically. When the first seedling box detecting means (here constituted by a limit switch) SW1 provided at a position slightly before the seedling extraction position PU detects that there is no seedling box, the electric motor M is driven to rotate and the seedling box C is Send it out. When one seedling box C is sent out, another seedling box C can be placed on top of the transport guide bodies 30a and 30a. As a result, two seedling box transport devices 30 and 30 can be loaded. It has a configuration.
[0032]
  As shown in FIG. 5, when the preceding seedling box C is sent one by one in the pot p by the progress of the seedling transplanting operation, the rear end of the seedling box passes the detection position of the first seedling box detecting means SW1. The electric motor M is driven to rotate and the next seedling box C is sent out. At this time, if the next seedling box C collides with the preceding seedling box C vigorously, the seedling may jump out and fall, or the preceding seedling box C may be displaced and a seedling removal failure may occur. When the front end of the seedling box C is located at this position slightly before the box C hits the preceding seedling box C, the next seedling is reached until the rear part of the seedling box is still held by the rollers r1 and r2. When the second seedling box detection means SW2 for detecting that the box C has been provided is detected and the detection means SW2 detects the next seedling box C, the electric motor M is stopped and the seedling box C is stopped. Then, after the set time has elapsed, the electric motor M is driven again and the seedling box C is moved.Send out. This prevents the next seedling box C from colliding with the preceding seedling box C vigorously.
[0033]
  As shown in FIG. 6, the second seedling box detection means SW2 is constituted by a limit switch here, but the detection part SW2a of the switch engages the left and right edges pf and pf of the seedling box C. When the left and right edge portions pf and pf of the seedling box pass through the groove, the detection unit SW2a is swung so that the switch is switched to the seedling box detection state. The grooves for engaging the left and right edge portions pf, pf of the seedling box C are provided wider than the thickness of the edge portions pf, pf for smooth movement of the seedling box. For this reason, the direction away from the detection unit SW2a If the seedling box C passes the detection part of the second seedling box detection means SW2 by approaching, there is a possibility that it cannot be detected accurately, and therefore the presser BB that presses the edge portions pf and pf in a direction approaching the detection portion SW2a. Is provided by cutting out a part of the plate portion on the upper surface of the conveyance guide body 30a and bending it into a groove. Thereby, the detection of the second seedling box detection means SW2 is ensured, and the next seedling box C can be surely stopped before colliding with the preceding seedling box C. In addition, the presser body BB acts as a brake when stopping the preceding seedling box C, and reducing the load on the electric motor M by forcibly stopping the seedling box C by stopping the electric motor M. It is useful for long-term use of the electric motor M. The electric motor M has an internal configuration in which an electrically rotating shaft is transmitted to the motor output shaft via a worm gear, and the motor output shaft is not rotated unless the motor output shaft has a considerably large torque. In the figure, Co is a controller for the electric motor M. By the way, the empty seedling box after the seedling is taken out is provided so that the transport guide bodies 30a, 30a bend upward in a U shape, so that it is transported upward again and discharged from its upper end. The empty seedling box is accommodated in the empty box housing frames 30b, 30b.
[0034]
  In order to prevent a situation in which the leaf stems Nb of the horizontal row of seedlings N transported to the seedling extraction position PU are entangled with each other and the seedlings are not supplied one by one, they enter the upper surface of the seedling box between adjacent pots p. And a weed plate DV for separating the leaf stem portion Nb of the seedling N adjacent to the left and right. As shown in FIGS. 7 and 8, the weed plate DV is provided on a support member (support shaft) DVa provided so as to be located rearward from the leaf tip position of the seedling N at a position above the seedling extraction position PU. It is attached integrally, so that the support shaft DVa of the weed plate DV does not interfere with the seedling to be taken out, and has a function of dividing the leaf stem Nb of the seedling N until just before the taking out. ing. The plate DV is connected to a crank-driven rod L and is provided so as to rotate around the support shaft DVa so that the front end of the plate moves back and forth, so that the leaf stem Nb of the seedling N can be divided smoothly. It has become.
[0035]
  As shown in FIGS. 9 and 10, etc., the seedling holder 31 is formed with seedling holding portions 31a,. Thus, the seedlings n pushed out by the seedling pushing pins pp provided for several pots p in the horizontal row of the seedling box C are engaged here. Support plates 31c and 31c fixed to the left and right side ends of the seedling holder 31 are pivotally attached to the front ends of the two swing arms 31b, 31b, 31b, and 31b. By swinging the swing arm, the seedling holder 31 reciprocates between the seedling extraction position PU and the seedling extraction position Q along an arc locus K.
[0036]
  When the seedling holder 31 is in the seedling extraction position PU, the floor soil part (root part) Na of the seedling N taken out from the seedling box C is pushed into the seedling holding parts 31a,. The seedling holder 31 holding the seedling thus moves to the seedling extraction position Q, where the seedling N is extracted from the seedling holder 31 by the following seedling extraction tool 50, and the extracted seedling N is extracted by the following seedling presser 51. The belt is forcibly pushed down on the lateral feed belts 32 and 32.
[0037]
  As shown in FIG. 10, seedling holders 31c,... Projecting inwardly from the inner surfaces of the seedling holding portions 31a,. Yes. Thereby, when the floor soil part Na of the seedling N is slightly smaller depending on the way of raising seedlings, for example, when caking agent is added to prevent the floor soil part Na from collapsing, and the floor soil part Na is consolidated. In some cases, the state of engagement of the bed soil portion Na of the seedling holding portions 31a,... Is loosened, but if the seedling holding bodies 31c,. The seedling holding bodies 31c projecting in the direction engage with a part of the side portion of the floor soil portion Na so that even the smaller floor soil portion Na is appropriately held, and the seedling holding portions 31a,. The seedling holding is disturbed, so that it becomes difficult for seedling planting devices 34 and 34 to fail to supply seedlings and to cause seedling planting defects. Since the seedling holders 31c,... Are detachably attached to the seedling holding parts 31a,..., The floor soil Na of the seedling N is pushed into the seedling holding parts 31a,. .. Repeatedly extracting the floor soil portion Na of the seedling N from the portions 31a,... And repeated sliding contact of the floor soil portion Na with the seedling holder 31c,. The seedling holder 31 can maintain an appropriate seedling retention.
[0038]
  In particular, the seedling holder 31 is formed of a resin material, while the seedling holders 31c,... Are formed of a metal material, so that the seedling holding portions 31a,. The seedling hold portions 31a,... Can be easily molded, and the wear of the resin seedling hold portions 31a can be prevented from proceeding quickly, and the seedlings projecting from the inner surfaces of the seedling hold portions 31a,. The holding body 31c, ... is in a state where the sliding contact of the floor soil portion Na becomes relatively strong, and this portion is made of metal and is resistant to wear, and can be easily replaced with a new one even if wear progresses. The proper seedling retention at 31 can be maintained for a long time.
[0039]
  Further, the seedling holding bodies 31c,... Continue from the seedling entrance 31in that is the front opening to the vicinity of the seedling outlet 31out where the bottom 31d of the seedling holding part 31a,. Provided. Therefore, at the time of seedling extraction, when the bed soil portion Na held by the seedling holding portions 31a,... Is pushed by the seedling removal tool 50 and pushed out to the seedling outlet portion 31out, the floor soil portion Na of the seedling holder 31c,. The floor soil Na falls smoothly from the seedling outlet 31out, and the seedling N is smoothly extracted from the seedling holder 31.
[0040]
  Further, the seedling holding body 31c,... Is formed by bending a plate-like body having a narrow vertical width at the center of the left and right sides and further bending the end portion, and partitioning the seedling holding parts 31a, 31a adjacent to the left and right. .. Are attached so that they can be easily attached and detached, and the seedling holders 31c,... For the two seedling holding portions 31a, 31a can be integrally provided to reduce the number of parts, thereby reducing the cost. Down and attachment / detachment work time can be shortened. In particular, as shown in the figure, the seedling holding bodies 31c,... Further, the rear end of the seedling holding body 31c,... Is bent, and the bent portion 31f is provided so as to enter and engage with the holes 31g,. The front end portions 31h,... Of the seedling holders 31c,... Are provided so as to engage with the recesses 31i,. This reliably prevents the attached seedling holders 31c,. In the above example, the seedling holders 31c, ... are formed by bending a narrow plate, but may be formed by a round bar such as a wire.
[0041]
  In the seedling removal tool 50, seedling extraction rods 50a,... Are fixedly attached to the attachment plate 50b so as to correspond to the positions of the seedling holding portions 31a,. In the vicinity of the seedling extraction position Q, the seedling holder 31 moves in a substantially horizontal direction. Therefore, when the seedling holder 31 moves to the seedling extraction position Q, the seedling push-out bar 50a,... Moves the seedling holding part 31a,. Stick out. Thereby, the bed soil part Na of the seedling N held by the seedling holding parts 31a, ... is pushed backward.
[0042]
  The seedling pressing body 51 is a plate made of an iron plate in which a front portion 51a branches in a comb shape, and an elastic body 51b such as a sponge having an appropriate thickness is attached to the lower surface of the rear portion. This seedling presser 51 is fixed to the rear end portion of the support arm 53 attached to the seedling tapping rotation shaft 52 in the left-right direction. Further, a swing arm 54 is integrally attached to the rotation shaft 52, and the swing roller 54 is rotatably supported at the tip of the swing arm 54 so that the cam roller 55 comes into contact with the cam surface of the cam disk 56. The moving arm 54 is biased by a spring 57. The cam disk 56 is formed with a recess 56a for the cam roller 55 to fall and to turn the seedling pressing body 51 downward.
[0043]
  When the cam disk 56 rotates in a predetermined direction in synchronization with the operation of the seedling holder 31, the seedling pressing body 51 is moved down and extracted as soon as the seedling is extracted from the seedling holder 31 by the seedling removal tool 50. The seedling N that falls is pressed onto the laterally feeding belt 32. At this time, the front part (comb-like part) 51a of the seedling pressing body 51 hits the bed soil part Na of the seedling, and the elastic body 51b hits the leaf stem Nb of the seedling. By striking the seedling bed soil Na with the comb-shaped portion 51a made of iron plate, the striking force on the seedling is efficiently transmitted to the seedling bed soil Na, and the seedling N is reliably supplied to the transverse feed belt 32 by being dropped. The Further, by struck the leaf stem Nb of the seedling with the elastic body 51b, the leaf stem Nb of the soft seedling is prevented from being damaged. After the seedling presser 51 moves down and presses the seedling N onto the lateral feed belt 32, the seedling presser 51 immediately moves up.
[0044]
  The support arm 53 is set so as to enter the seedling holding portion 31a of the seedling holder 31 when the seedling is pressed, and the lower portion of the seedling box transport device 30 in which the support arm 53 is U-shaped and the lower part thereof. While swinging in a limited space between the lateral feed belts 32 and 32, the seedling pressing body 51 can swing so as to be as close to the lateral feed belts 32 and 32 as possible when pressing the seedlings. Thus, the seedlings N can be moved on the laterally feeding belts 32, 32 in a quick and reliable and accurate posture.
[0045]
  The laterally feeding belts 32, 32 are a pair of left and right drive rotating belts. Each lateral feed belt 32 is hung on a drive roller 32a that is rotationally driven by a lateral feed drive shaft 61 that protrudes rearward from the transmission case 60, and a driven roller 32b that is rotatably attached to the driven shaft 61a. The upper surface of the lateral feed belt 32 moves to the right and the upper surface of the left lateral feed belt 32 moves to the left. Therefore, the right half (seven seedlings in this example) of the horizontal row of seedlings N,... Removed from the seedling holder 31 is received by the upper surface of the right lateral feed belt 32 (R), and the left half. (Seven seedlings in this example) are received on the upper surface of the left lateral feed belt 32 (L), and are received on the upper surface of the right lateral feed belt 32 (R) by the rotation of the lateral feed belts 32, 32. The seedlings N,... Are carried one by one to the right lateral feed carry-out location 32out (R) on the right end side, and the seedlings N,... Received on the upper surface of the left lateral feed belt 32 (L) are the left end thereof. It is fed out one by one to the lateral left lateral feed out location 32out (L). In this example, the seedlings carried out one by one in the right lateral feed carry-out location 32out (R) are taken over by the vertical feed by the right vertical feed belts 33, 33 provided therebelow, and the left lateral feed carry-out location 32out. The seedlings carried out one by one in (L) are taken over by vertical conveyance by the left vertical feeding belts 33, 33 provided below the seedlings.
[0046]
  A plurality of protrusions 32c are provided on the outer circumferential surface of the lateral feed belts 32, 32 so as to project at a set interval in the belt rotation direction, and are taken out from the seedling box C on the outer circumferential surfaces of the lateral feed belts 32, 32. When a plurality of seedlings N,... Are placed, that is, as shown in FIG. 11, a horizontal row of seedlings N extracted from the seedling holder 31 by the seedling removal tool 50 (in this example, a horizontal row) Of the right half 7 seedlings and the left half 7 seedlings) are placed on the left and right lateral feed belts 32, 32, the protrusions 32 c,... It is located between each floor soil part Na. Thereby, the horizontal alignment state of the plurality of seedlings N,... Mounted on the lateral feed belts 32 is maintained. In addition, said protrusion 32c, ... is set to the height of about half of the height from the outer peripheral surface of the laterally feeding belts 32, 32 to the upper end of the bed soil portion Na of the seedlings placed on the outer peripheral surface. At least at such a height, even if the bed soil Na of the seedling is cylindrical, the seedling on the lower side of the belt rotation direction is placed over the protrusion 32c,. It rolls on the upper surface of the belt between the adjacent protrusions 32c,..., And it becomes difficult for the seedlings to be conveyed one by one, resulting in poor planting. In addition, the shape of the protrusions 32c,... Is formed in a substantially conical shape in this example, but may be a prismatic shape. In this example, a plurality of protrusions 32c,. You may form in the continuous ridge.
[0047]
  When the plurality of seedlings N,... Taken out from the seedling box C are placed on the left and right lateral feed belts 32, 32, the lateral feed carry-out locations 32out (R), On the upper surface on the 32out (L) side, portions (terminal-side seedling placement surfaces 32e (R), 32e (L)) on which one seedling N, N is placed are further provided. Therefore, the number of seedlings obtained by adding two to the number of seedlings N,... Taken out from the seedling box C (a total of 14 in this example) is placed on the left and right upper surfaces of the lateral feed belts 32, 32, respectively. Yes. When the work is continuously performed, the seedling located at the most left and right center side of the seedlings N,... Taken out from the seedling box C last time is the terminal side seedling mounting surface 32e (R) of the laterally feeding belts 32, 32, The next seedlings N,... Are supplied onto the lateral feed belts 32, 32 in a state of being placed on 32e (L). Conventionally, the lateral feed belt has been provided with the width of the upper surface of the seedling on the left and right outermost sides on the upper surface of the lateral feed belt because the width of the upper surface of the lateral feed belt is just wide enough for the number of seedlings in a row. The seedlings that have fallen on the loading surface may bounce and fall to the lateral feed carry-out point on the outside of the belt, and the fallen seedlings are planted in the field together with the seedlings that were carried out before that Two plantings were planted, and after that, there were occasions when there were missing plants. However, by providing the terminal-side seedling mounting surfaces 32e (R) and 32e (L) as described above, the right and left outermost seedlings of the seedlings N,. R) and 32out (L) will not fall down, and two planting and lacking will not occur. In this example, the seedlings are set to be placed one by one on the terminal-side seedling mounting surfaces 32e (R) and 32e (L). However, the above-described effect can be obtained even by setting a plurality of seedlings. However, in the case where one seedling is placed on each of the terminal side seedling mounting surfaces 32e (R) and 32e (L), the lateral width of the lateral feed belt 33 can be reduced as much as possible, which is advantageous in terms of a compact configuration. is there.
[0048]
  The left and right lateral feed belts 32, 32 are spaced apart from each other so that the protrusions 32c of the left and right lateral feed belts 32, 32 are not in contact with each other. A partition 63 having a surface inclined downward toward the upper surface of the belt is provided. As a result, the horizontal rows of seedlings N,... Taken out from the seedling box C are accurately divided into left and right halves and conveyed by the left and right lateral feed belts 32, 32. In addition, since the seedling box C is provided with the wide portion pe in the left and right central portions as described above, the horizontal seedlings N,... Are easily divided into left and right halves. However, if the wide part pe is set too wide, the upper surface on which the seedling on the left and right center side of the lateral feed belt can be set widely can be set widely. However, the seedling box becomes large and the seedling box is increased in cost. Problems such as an increase in area become prominent.
[0049]
  Therefore, in the present example, the horizontal rows of seedlings N,. The following contrivances have been made so that the right and left halves are transported properly. That is, as shown in FIG. 12, when the horizontal row of seedlings N,... Taken out from the seedling box C is dropped and supplied onto the lateral feed belts 32, 32, the bed soil portion of the seedling located at the most left and right center side thereof. The projections 32cX and 32cX that are positioned between the NC1a and NC1a and the bed soil portions NC2a and NC2a of the seedlings adjacent to the left and right outside of the NC1a and NC1a are set to have a substantially upright posture. Specifically, the diameter of the driven roller 32b is reduced so that the protrusions 32c and 32c are in a substantially upright posture, and the driven shaft 61a is arranged close to the left and right central side. Also in this case, the protrusions 32c of the left and right lateral feed belts 32 are prevented from contacting each other. As a result, the floor soil portions NC1a and NC1a of the seedlings located on the most left and right central side of the horizontal row of seedlings N,... Falling on the lateral feed belts 32, 32 are pushed up by the tips of the protrusions 32cX, 32cX. It is not in the state, but is received at the side portions of the protrusions 32cX and 32cX that are in the substantially upright posture, and is received in a state of being close to the upper surface of the belt. In addition, the lower part of the left-right center side part of the said floor soil part NC1a and NC1a will be in the state received by the inclined surface of the said partition body 63. FIG. Therefore, even if the protrusions 32cX and 32cX move to the left and right outwards due to the rotation of the laterally feeding belts 32 and 32 from this state, the floor soil portions NC1a and NC1a are lowered without greatly bouncing to the belt upper surface, and then The protrusions 32cY and 32cY that come are surely conveyed left and right outwards, so that the laterally feeding belts 32 and 32 can surely carry out the seedlings one by one to the laterally feeding and unloading locations 32out (R) and 32out (L). become.
[0050]
  By the way, conventionally, as shown in FIG. 13, it is located between the bed soil portions NC1a and NC1a of the seedling that are located on the most left and right center side and the bed soil portions NC2a and NC2a of the seedling that are adjacent to the left and right outside thereof. Since the protrusions 32cX and 32cX are inclined to the left and right central sides and are received at the tips of the protrusions 32cX and 32cX, the protrusions 32cX and 32cX are received at positions away from the belt upper surface. When the protrusions 32cX, 32cX move to the left and right outwards due to the rotation, the floor soil portions NC1a, NC1a easily bounce off the upper surface of the belt and easily descend, so that the protrusions 32cY, 32cY coming next are overcome and the protrusions 32cY. , 32cY may rest on the upper surface of the belt. t (R), reliably seedlings 32OUT (L) is there was that situation can not be one by one out occurs.
[0051]
  The above-described configuration including the seedling removal tool 50 and the seedling pressing body 51 for taking out the seedling of the seedling holder 31 onto the lateral feed belt 32, and the above configuration of the lateral feed belt 32 are described later. The seedling transplanting machine having the configuration of the seedling takeover portion from the belt 32 to the longitudinal feed belts 33 and 33, and the seedling transplanting apparatus in which the seedling planting device 34 is configured by the planting disks 34a and 34a are not employed. .
[0052]
  Next, the vertical feed belts 33 and 33 for transferring the seedlings inherited by the seedlings conveyed by the lateral feed belt 32 and the configuration of the takeover portion will be described.
  As shown in FIG. 15, the longitudinal feed belts 33, 33 guide the pair of belts 33, 33 so as to sandwich and convey the bed soil portion Na of the seedling N, and guide rollers 33 a,. It is hung on. The rotation of the lateral feed drive shaft 61 is transmitted to the longitudinal feed belt drive shaft 63 through the chain 62, and the guide roller 33a (B) at the lower end of the inner longitudinal feed belt 33 attached to the longitudinal feed belt drive shaft 63 is rotated. To drive. Thereby, the opposing part of a pair of longitudinal feed belts 33 and 33 moves below. The seedling is dropped and supplied from the outer end portion of the lateral feed belt 32 to the upper end interval portion of the pair of vertical feed belts 33, 33, and the bed soil portion Na of the seedling is sandwiched by the vertical feed belts 33, 33 and conveyed downward. . Then, the seedlings N are released at the lower ends of the longitudinal feed belts 33, 33, and the seedlings are supplied to the seedling transplanting apparatus 34 one by one.
[0053]
  A guide roller 33a (A) for hanging the upper end of the longitudinal feed belt is supported by the upper frame 65, and a guide roller 33a (B) for hanging the lower end of the longitudinal feed belt is supported by the lower end of a bracket 67 fixed to the lower frame 66. The guide roller 33 a (C) that hangs the upper and lower intermediate portions of the vertical feed belt is supported by a support arm 68 attached to the upper portion of the bracket 67. By changing the fixing position of the bracket 67 with respect to the lower frame 66, it is possible to correspond to the change of the planting strips D.
[0054]
  At the seedling takeover part from the lateral feed belt 32 to the longitudinal feed belts 33, 33, the seedling as a forced moving tool for forcibly moving the seedling fed from the transverse feed belt 32 to the conveyance start end of the longitudinal feed belts 33, 33 A pushing tool 70 is provided. The seedling pusher 70 is attached to an arm 70b that is rotatably supported by a seedling pusher turning shaft 70a. A seedling pusher drive cam 70c that rotates in a fixed direction is provided with a cam roller 70d attached to the arm 70b. By pressing intermittently, it moves downward at appropriate timing. When the seedling pusher 70 moves downward, it enters the seedling takeover moving path C from the lateral feed belt 32 to the vertical conveying belts 33, 33 from above, and the seedlings in the moving path C are forcibly forced to the vertical feeding belt 33. , 33 is operated to be pushed into the conveyance start end portion.
[0055]
  Further, the seedling takeover portion is provided with a shutter 71 for receiving seedlings that have fallen from the conveying end portion of the lateral feed belt 32 so as not to deviate outwardly from the outer longitudinal feed belt 33. A regulation roller 72 that is a regulation tool that regulates the supply of seedlings from the conveyance end portion to the seedling pushing tool 70 is provided. The shutter 71 is constituted by a plate body, and an upper end portion thereof is rotatably supported, and a lower end portion is a spring so as to rotate in a direction blocking the seedling takeover moving path C from the lateral feed belt 32 to the vertical conveying belts 33 and 33. It is energized by an energizing body such as. The regulation roller 72 is positioned above the terminal-side seedling mounting surface 32e of the lateral feed belt 32, and the lower end position of the outer peripheral surface of the regulation roller 72 is the floor of the seedling N placed on the terminal-side seedling mounting surface 32e of the lateral feeding belt 32. It is set so as to be located slightly below the upper end of the soil Na, and the outer peripheral portion of the regulating roller 72 is provided so as to be elastically deformable. Further, the restriction roller 72 is provided with gears g1 and g2 that mesh with each other between the transverse feed drive shaft 61 of the drive roller 32a of the transverse feed belt 32 and the drive shaft 72a that rotates the restriction roller 72 integrally. The lower side of the outer peripheral surface 72 is driven so as to rotate in the same direction and at the same speed as the rotation direction of the lateral feed belt 32. Accordingly, as shown by a chain line in FIG. 16, when the seedling pushing tool 70 is in the standby position above the seedling takeover moving path C, the shutter 71 is in a closed state. The seedling N placed on the terminal end seedling mounting surface 32e of 32 is fed between the lateral feed belt 32 and the regulating roller 72 and fed out to the moving path C, and the seedling N is received by the shutter 71. Then, the seedling pushing tool 70 moves downward from this state, and the seedling pushing tool 70 pushes the shutter 71 outward through the seedling N as shown by the solid line in FIG. N is pushed into the conveyance start end portions of the vertical feed belts 33 and 33 by the seedling pushing tool 70. At this time, since the next seedling N placed on the terminal side seedling mounting surface 32e of the laterally feeding belt 32 is regulated by the regulation roller 72 and is sent out to the takeover moving path C, a plurality of seedlings are formed. At the same time, it is prevented from being supplied to the longitudinal feed belts 33 and 33. Further, when the seedling pushing tool 70 moves upward, the seedling is prevented from being fed out from the lateral feed belt 32 and jumped up.
[0056]
  By the way, when the seedling N placed on the terminal-side seedling mounting surface 32e of the lateral feed belt 32 is sandwiched and fed between the lateral feed belt 32 and the regulation roller 72, the outer peripheral portion of the regulation roller 72 provided so as to be elastically deformable is It will be depressed by the bed soil Na of the seedling. If the outer periphery of the restriction roller is provided so as to be elastically deformable with a sponge or the like, there is a problem that the outer periphery of the restriction roller is gradually recessed due to a long-term operation and cannot be restored to its original shape. However, in this example, as shown in FIG. 17, the hollow portion 72b is formed between the outer peripheral surface of the regulating roller 72 and the drive shaft 72a, and is formed of an elastic body such as rubber. Specifically, when the inner diameter of the shaft holes 72c and 72c of the restriction roller 72 is formed larger than the diameter of the drive shaft 72a, and the restriction roller 72 is mounted on the drive shaft 72a through the drive shaft 72a in the shaft holes 72c and 72c. The shaft holes 72c and 72c are closed by the drive shaft 72a, and a sealed hollow portion 72b is formed by a hole formed larger than the diameter of the drive shaft 72a. Therefore, the regulating roller 72 can be elastically deformed so as to be restored to its original shape by the elastic action of the elastic body forming the regulating roller 72 and the internal pressure of the sealed hollow portion 72b. By adopting such a configuration, the problem that the outer peripheral portion of the regulating roller gradually dents due to long-term work and does not return to its original shape is solved, and it is possible to perform transplanting work of an accurate seedling over a long period of time. become.
[0057]
  The seedling planting device 34 includes a pair of left and right disk-shaped planting disks 34a and 34a arranged in a substantially V shape in plan view so that the lower side of the front part contacts. These planting discs 34a, 34a have engagement holes 34b,... Engaged with teeth of a gear 75 attached to the longitudinal feed belt drive shaft 63 at equal intervals on the circumference, and drive the longitudinal feed belt. As the shaft 63 rotates, the planting disks 34a, 34a rotate so that the front part moves from top to bottom at the same speed as the operating speed of the longitudinal feed belts 33, 33. When the leaves and stems Nb of the seedling N are supplied one by one between the parts where the vertical feeding belts 33 and 33 start to contact the left and right planting disks 34a and 34a, the stems and leaves Nb are supplied to the left and right planting disks. 34a and 34a are clamped and conveyed to the field, where the seedling N held by the left and right planting disks 34a and 34a is released and planted in the seedling planting groove G2.
[0058]
  Further, as shown in FIG. 18, the planting disks 34a and 34a are rotatably attached to the rear part of the support frame 77 in which the front part is rotatably attached to the horizontal shaft 78 fixed to the seedling transplanting device 4, A grounding ring 37, 37, which is a grounding ring that rolls in contact with the farm scene, is rotatably attached to the rear part of the support frame 77, and a planting groove forming disk that is a groove forming body that forms the planting groove G2. Both 35 and 35 and the groove forming devices 36 and 36 are attached to the support frame 77. The rear portion of the support frame 77 is urged downward by an urging body such as a spring 79. Thereby, the covering rings 37 and 37 are grounded to support the support frame 77 at a set height from the field scene, and the forming of the planting groove G2 by the groove forming bodies 35 and 35; As well as being maintained, the planting depth of the seedling N to the planting groove G2 by the seedling planting device 34 is maintained at the set height, and a satisfactory seedling transplanting operation can be performed.
[0059]
  More specifically, a support frame mounting portion 77a protruding upward at the front portion of the support frame 77 is provided below the bracket 67 fixed to the lower frame 66 fixed to the seedling transplanting device 4 so that the left and right positions can be changed. The horizontal support shaft 77 is pivotally attached to the horizontal shaft 78. The support frame 77 on the rear side of the horizontal shaft 78 branches left and right and extends rearward.Left and rightThe right and left planting disks 34a and 34a are rotatably attached to the left and right sides of the support frame rear portions 77b and 77b that branch and extend rearward. Further, support arms 77c and 77c are rotatably attached to the support frame rear portions 77b and 77b, respectively, and connection arms 77d and 77d are pivotally attached to the rear ends of the support arms 77c and 77c, and the connection arms 77d and 77d are attached. The support frame rear portions 77b and 77b are connected so that the connection position can be adjusted. As a result, the support arms 77c and 77c are supported and fixed to the support frame rear portions 77b and 77b in a rearwardly lowered posture, and the connection positions of the connection arms 77d and 77d to the support frame rear portions 77b and 77b are adjusted. The support rings 77 and 37c are supported so that the vertical position can be adjusted. The cover rings 37 and 37 are rotatably attached to the support arms 77c and 77c. It becomes a configuration to support at the set height. Further, a rod 77e is pivotally mounted in the vicinity of the rear end portions of the support frame rear portions 77b and 77b, and the upper portion of the rod 77e is fixed to the seedling transplanting device 4 and the bracket 65a fixed to the rear end portion of the upper frame 65 is fixed. A retaining pin 77f that prevents the rod 77e from falling out of the engagement hole of the bracket 65a is attached to a portion of the rod 77e that protrudes above the bracket 65a so as to be slidable. The spring 79 is fitted to the lower portion of the bracket 65a of the rod 77e so that the lower end is supported by a pin 77g. Accordingly, during the transplanting operation, the cover rings 37 and 37 are urged downward by the spring 79 to roll while maintaining the ground contact state, and the support frame 77 is moved by the vertical movement of the cover rings 37 and 37 during the ground contact rolling. Move up and down. When the seedling transplanting device 4 is raised during non-working, the lowering of the support frame 77 is restricted by the retaining pin 77f.
[0060]
  As shown in FIG. 21, the mounting structure of the planting disks 34a, 34a to the support frame 77 is such that a rotating shaft 34c is rotatably attached to the left and right support frame rear portions 77b, 77b. Disc supporting bosses 34d and 34d for mounting the planting discs 34a and 34a rotatably on the outer periphery are fitted between the support frame rear portions 77b and 77b, and rotate integrally with the rotating shaft 34c by pins 34e and 34e. So that it is installed. The disc supporting bosses 34d and 34d form shaft holes 34f and 34f so that the rotation centers 34aC and 34aC of the planting discs 34a and 34a mounted on the outer periphery thereof are positioned on the rotation axis 34cS of the rotation shaft 34c. In addition, the rotation axes 34aS and 34aS of the planting disks 34a and 34a are the rotation axes of the rotation shaft 34c so that the left and right planting disks 34a and 34a are in contact with the lower peripheral portions of the respective front lower sides. The shaft holes 34f and 34f are formed so as to obliquely intersect the line 34cS. The bosses 34h, 34h, which are provided by fixing bearings 34g,... On the outer periphery of the disc support bosses 34d,. It is attached to. The lever L is attached to one end of the rotating shaft 34c so as to rotate integrally, and a lever engaging portion provided at a plurality of positions on a lever support member 34i provided by fixing the lever L to the left and right support frame rear portions 77b. 34j... Is engaged to stop the rotation of the rotating shaft 34c. Therefore, when the lever L is rotated in the rotation direction of the rotation shaft 34c, the rotation shaft 34c and the disk supporting bosses 34d and 34d rotate around the rotation centers 34aC and 34aC of the planting disks 34a and 34a. The contact point H of the planting disks 34a, 34a is rotated in the rotation direction. When the contact point H can be set to an appropriate position, the lever L is engaged with the lever engaging portion 34j of the lever support member 34i at that position so that the rotating shaft 34c does not rotate. It should be noted that elastic bodies 34k, 34k such as sponges are affixed to the inside of the rotation outer peripheral side of the planting disks 34a, 34a, and the leaf stem Nb of the seedling N is sandwiched between these parts so as not to be damaged. It has become.
[0061]
  Therefore, the seedling transplanting machine 1 described above is a seedling transplanting machine provided with a pair of left and right planting disks 34a, 34a that conveys the leaf stem portion of the seedling from the left and right to the field. Are provided so that they can be rotated around the center of rotation of the planting disks 34a, 34a.
[0062]
  Further, an operating tool L is provided in the vicinity of the planting disks 34a, 34a for rotating the portion H where the left and right planting disks 34a, 34a contact each other around the rotation center of the planting disks 34a, 34a. It is a thing.
  Further, a portion H where the left and right planting disks 34a, 34a abut each other is configured to be closer to the front side with respect to the rotation center of the planting disks 34a, 34a, and the operation tool L is disposed on the planting disk 34a, The lever extended to the rear side of 34a is operated by rotating up and down.
[0063]
  Therefore, in the seedling transplanting machine 1 described above, the pair of left and right planting disks 34a and 34a sandwich the leaf stem Nb of the seedling N from the left and right and transfer it to the field to transplant the seedling. Further, when the place H where the left and right planting disks 34a, 34a abut each other is rotated around the rotation centers 34aC, 34aC of the planting disks 34a, 34a, the left and right planting disks 34a, 34a are separated from each other. The position E is released in the rotational direction of the planting disks 34a, 34a or in the opposite direction.
[0064]
  For example, when the leaf stem Nb of the seedling N supplied to the planting disks 34a and 34a is thick, the place H where the left and right planting disks 34a and 34a touch each other is the rotation direction of the planting disks 34a and 34a. By rotating in the opposite direction, adjustment is made so that the position E where the left and right planting disks 34a, 34a are separated from each other to release the seedling is repositioned in the direction opposite to the rotation direction of the planting disks 34a, 34a. For example, as shown in FIG. 20, the lever H is rotated from the location A to the location B, and the location H where the left and right planting disks 34a and 34a contact each other is located at H (A). The position E is adjusted from the state to the position located at H (B), and the position E where the right and left planting disks 34a and 34a are separated from each other to release the seedling is adjusted from the position E (A) to the position E (B). To do. Thereby, it can adjust so that raising of a seedling may not arise. Further, when the leaf stem portion of the seedling supplied to the planting disks 34a and 34a is thin, the planting disks 34a and 34a are rotated in the rotation direction at the place H where the left and right planting disks 34a and 34a contact each other. Then, the position E where the left and right planting disks 34a and 34a are separated from each other to release the seedling is adjusted so that the position is changed in the rotational direction of the planting disks 34a and 34a. For example, as shown in FIG. 20, the lever H is rotated from the location A to the location C, and the location H where the left and right planting disks 34a and 34a contact each other is located at H (A). The position E is adjusted from the state to the position located at H (C), and the position E where the right and left planting disks 34a and 34a are separated from each other is released from the position E (A) to the position E (C). To do. Thereby, it can adjust so that the fall of a seedling may not arise.
[0065]
  Since the place H where the left and right planting disks 34a and 34a contact each other is rotated around the rotation centers 34aC and 34aC of the planting disks 34a and 34a, the position of the entire planting disks 34a and 34a changes vertically. Therefore, the planting depth of the seedling does not fluctuate with the rotation operation.
[0066]
  Therefore, this seedling transplanting machine 1 can adjust the position E where the right and left planting disks 34a and 34a are separated from each other to release the seedling according to the thickness of the leaf stem portion of the seedling, Since the planting depth of the seedling is not changed by the adjusting operation, it can be easily adjusted so that the seedling can be planted properly, and the left and right planting disks 34a and 34a are in contact with each other. Is rotated around the center of rotation of the planting disks 34a, 34a, so that the operation mechanism can be easily simplified.
[0067]
  In addition, the seedling transplanting machine 1 further rotates the place where the right and left planting disks 34a and 34a contact each other around the rotation center of the planting disks 34a and 34a. Since it is operated by the operating tool L in the vicinity of the attached disks 34a, 34a, the adjusting operation can be performed accurately while watching the planted disks 34a, 34a to be rotated.
[0068]
  In the seedling transplanting machine 1, the left and right planting disks 34a, 34a are in contact with each other at the front side with respect to the center of rotation, while the rear side is separated from the left and right with respect to the center of rotation. Thus, when operating the operating tool L configured to rotate and operate the lever extending to the rear side of the planting disks 34a, 34a, the left and right planting disks 34a, 34a are in contact with each other. It is possible to operate while checking the position, and to perform more accurate adjustment operations.
[Brief description of the drawings]
FIG. 1 is a side view of a seedling transplanter.
FIG. 2 is a side view of a seedling transplanting apparatus.
FIG. 3 is a plan view of a seedling transplanting apparatus.
FIG. 4 is a simplified side view showing the seedling transplanting action of the seedling transplanting apparatus.
FIG. 5 is a cross-sectional side view showing a seedling box supply operation mechanism of the seedling box transfer device.
6 is a cross-sectional side view showing a part of FIG. 5;
FIG. 7 is a side view showing a weed plate.
FIG. 8 is a rear view showing a part of the weed plate.
FIG. 9 is a cross-sectional side view showing an operation part from seedling extraction to lateral feed of the seedling transplanting apparatus.
10A is a sectional side view showing a seedling holder, and FIG. 10B is a partial front view thereof.
FIG. 11 is a plan view showing a seedling holder and a seedling pressing body.
FIG. 12 is a cross-sectional rear view of the transverse feed belt.
FIG. 13 is a cross-sectional rear view showing the operating state of a part of the lateral feed belt.
FIG. 14 is a cross-sectional rear view showing a conventional operation state of a part of the transverse feed belt.
FIG. 15 is a rear view showing a lateral feed belt and a longitudinal feed belt.
FIG. 16 is a rear view showing a takeover portion from a transverse feed belt to a longitudinal feed belt.
FIG. 17 is a sectional side view showing a regulating roller.
FIG. 18 is a side view showing a grooving device, a seedling planting device, and a covering ring.
FIG. 19 is a cross-sectional rear view of the support frame.
FIG. 20 is a side view showing a seedling planting device and a cover ring.
FIG. 21 is a cross-sectional rear view of a planting disk.
FIG. 22 is a plan view of the automatic steering device.
23A is a sectional rear view showing a guide groove forming state, and FIG. 23B is a sectional rear view showing a guide groove engaging state of a guide wheel.
FIG. 24 is a plan view of a seedling box.
FIG. 25 is a front view of a seedling box.
26A is a plan view of a pot, and FIG. 26B is a sectional side view of the pot.
[Explanation of symbols]
  N: Seedling
  Na: seedling floor soil
  Nb: Leaf stem of seedling
  1: Seedling transplanter
  2:Agricultural tractor
  4: Seedling transplanter
  34: Seedling planting device
  34a: Planting disc
  34aC: Center of rotation of the planting disk 34a
  34aS: rotation axis of the planting disk 34a
  34c: Rotating shaft
  34cS: Rotation axis of the rotation shaft 34c
  34d: disc support boss
  34f: Shaft hole
  34i: Lever support member
  34j: Lever engaging portion
  66: Lower frame
  67: Bracket
  77: Support frame
  77a: Support frame mounting portion
  77b: Rear left and right support frames
  78: Horizontal axis
  H: Where the left and right planting discs touch each other
  L: Operation tool

Claims (2)

In a seedling transplanter provided with a pair of left and right planting discs ( 34a, 34a ) that conveys the leaf stem portion of the seedling from the left and right to the field, the left and right planting discs ( 34a, 34a ) contact each other (H) the planting discs (34a, 34a) of the provided rotatably operated around the rotational center, left and right planting disc (34a, 34a) is the planting discs (34a Setto to place the (H) with each other , 34a) and the rotation center of the planting disk (34a, 34a) is arranged around the rotation center of the planting disk (34a, 34a) at the position (H) where the left and right planting disks (34a, 34a) contact each other. A seedling transplanter characterized in that the operation tool (L) that is pivotally operated is operated by vertically rotating a lever that extends to the rear side of the planting disk (34a, 34a) . A seedling transplanting device (4) is attached to the rear part of the agricultural tractor (2) so as to be movable up and down to constitute a seedling transplanting machine, and fixed to the lower frame (66) fixed to the seedling transplanting device (4) so that the left and right positions can be changed. A support frame mounting portion (77a) projecting upward at the front portion of the support frame (77) is rotatably attached to the lower portion of the bracket (67) by the horizontal shaft (78), and the rear of the horizontal shaft (78). The left and right support frame rear portions (77b, 77b) branching from the left and right support frames (77) to the left and right are provided with a rotation shaft (34c), and the left and right support frame rear portions (77b) of the rotation shaft (34c). 77b) is provided so that the disc supporting bosses (34d, 34d) having the planting discs (34a, 34a) mounted rotatably on the outer periphery thereof are fitted to rotate integrally with the rotary shaft (34c), For disc support The rotation centers (34aC, 34aC) of the planting disks (34a, 34a) mounted on the outer periphery thereof are positioned on the rotation axis (34cS) of the rotation shaft (34c). In addition, the rotation axis (34aS, 34aS) of the planting disk (34a, 34a) is a rotation axis (so that the outer peripheral portions of the front lower side of the left and right planting disks (34a, 34a) are in contact with each other. A shaft hole (34f, 34f) is formed so as to obliquely intersect the rotation axis (34cS) of 34c), and a lever is provided to rotate integrally with one end of the rotation shaft (34c). The rotation of the rotating shaft (34c) is stopped by engaging with one of the lever engaging portions (34j) provided at a plurality of positions of the lever supporting member (34i) fixed to the rear portion (77b) of one of the left and right support frames . It is characterized by Seedling transplantation machine of claim 1, wherein.

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