JP2009284877A - Seedling planter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a position-adjusting shaft for cantilever-supporting a seedling-planting member on a soil-covering member-supporting frame on one of the right and left sides of the seedling-planting member is liable to be interfered when the soil-covering member-supporting frames are disposed on both the right and left sides of the seedling-planting member. <P>SOLUTION: In the seedling planter, the seedling-planting member 5 which is upward or downward moved with an upward or downward moving mechanism 4 on a prescribed operation locus to plant seedlings on a field is disposed; a seedling-supplying device 24 for supplying the seedlings to the right or left seedling-planting member 5 is disposed; and a soil-covering member 73 for soil-covering the peripheries of the seedlings planted with the seedling-planting member 5 is disposed behind the seedling-planting member 5. Further, a lateral position-changeable position adjustment shaft is laterally disposed on a member disposed at the rotation end of the upward or downward moving mechanism 4, cantilever-supporting the seedling-planting member 5 at one end of the position adjustment shaft, and the soil-covering member 73 is supported on the rear end of the soil-covering member-supporting frame 100 extended from the front side of the seedling-planting member 5 to the rear side on the opposite side of the position adjustment shaft. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  This invention belongs to the technical field of seedling transplanters.

A beak-shaped seedling planting structure configured to plant a seedling in a field by moving up and down with a predetermined operation locus by a vertical movement mechanism is provided on each side, and a seedling supply device that supplies seedlings to each of the left and right seedling planting bodies is provided, The seedling supply device includes a seedling supply cup serving as a plurality of seedling containers for storing seedlings, and a plurality of seedling supply cups arranged in a loop at a predetermined arrangement pitch and sequentially passing above each seedling planting body. As a configuration in which the moving mechanism composed of a sprocket or the like that moves in a circular manner and the bottom lid support member that supports the bottom lid of the seedling supply cup in the closed state are missing at the drop supply position that is above the seedling planting body, A seedling drop supply mechanism that opens the bottom lid and drops the seedling accommodated in the seedling supply cup when the seedling supply cup is moved to the fall supply position by the vertical movement mechanism. Drop supply The structure has left and right drop supply positions corresponding to the right and left seedling planted bodies, and a first seedling supply cup for storing seedlings to be supplied at one fall supply position and a drop supply at the other fall supply position. Second seedling supply cups for storing seedlings to be placed are provided alternately and along the circular movement path, and the first and second seedling supply cups are moved to the respective drop supply positions by circular movement by a moving mechanism. In a multi-row seedling planting machine configured to reach the same number of times, the lower part of each seedling planting body is displaced in the left-right direction, and the seedling planting position by each seedling planting body is relative to each fall supply position Slightly shifted in the left-right direction so that the desired seedling planting position and thus between the planting strips can be planted, and a covering soil covering the seedling planted area around the seedling planted body is provided on the rear side of the seedling planted body. Seedling planting on both the left and right sides of the planted body Only the rear end portion of the soil cover body support frame extending over from the front side to the rear side of the body, there is disposed by supporting the soil covering member (see Patent Document 1.).
JP 2006-94832 A

  In the above-mentioned background art, the covering body support frame is extended from the front side to the rear side of the seedling planting body on the left and right sides of the seedling planting body. The position adjustment shaft that can be changed is extended in the left-right direction, and the seedling planting body is cantilevered at one end of the position adjustment shaft, so that the right and left position of the seedling planting body and thus the seedling planting position can be changed. When configured, if the position adjustment shaft is lengthened so that the right and left position of the seedling planting body, that is, the seedling planting position can be changed in a wide range, the position adjustment shaft may interfere with the soil covering support frame on the left and right sides of the seedling planting body There is.

In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention according to claim 1 is provided with a seedling planting body (5) configured to plant a seedling in a field by moving up and down with a predetermined movement trajectory by a vertical movement mechanism (4). 5) A seedling supply device (24) for supplying seedlings to a seedling planting body (5) is provided, and a seedling body (73) covering the periphery of the seedling planted by the seedling planting body (5) is provided on the rear side of the seedling planting body (5). In the transplanter, a position adjustment shaft (70) capable of changing the left-right position is extended in the left-right direction on a member (57) provided at the rotation tip of the vertical movement mechanism (4), and the position adjustment shaft (70) The seedling planting body (5) is cantilever-supported at one end of the seedling planting body, and the rear side of the seedling planting body (5) is located on the opposite side of the position adjustment shaft (70) from the front side to the rear side Seedling planting arranged to support the covering body (73) at the rear end of the covering body supporting frame (100) extending over And the.

Therefore, in the seedling planting machine according to claim 1, the seedling feeding device (24) supplies the seedlings to the seedling planting body (5), and the seedling planting body (5) has a predetermined operating locus by the vertical movement mechanism (4). Move up and down to plant seedlings in the field. And when changing a seedling planting position for a change etc. between planting strips, a seedling planting body (5) is moved by the position adjustment axis | shaft (70).
Therefore, seedlings can be dropped and supplied to the seedling planting body (5) at the timing when the seedling planting body (5) is moved up by the vertical movement mechanism (4). Supply can be done properly.

  Therefore, even if the seedling planting body (5) is moved up and down by the vertical movement mechanism (4), the position adjusting shaft (70) can be prevented from interfering with the covering body support frame (100). The position, that is, the seedling planting position can be changed.

  A seedling transplanter 1 according to an embodiment of the present invention will be described below. In the following description, the side on which the steering handle 2 is disposed is the rear, and the opposite side, that is, the side on which the engine 3 is disposed is the front. Then, the right hand side of the worker standing toward the front side of the machine body at the rear part of the machine body is set to the right, and the left hand side is set to the left.

  The seedling planting machine 1 includes a beak-shaped seedling planting body 5 that can be opened and closed by being connected to a vertical movement mechanism 4 that is driven to move up and down to a machine body that includes a traveling device and a steering handle 2. The pair of left and right front wheels 6 supported to roll freely and the pair of left and right rear wheels 7 that are driven and rotated by the power of the engine 3 being transmitted. The front wheel 6 and the rear wheel 7 can be guided to the gutter groove so that the aircraft can travel above the gutter.

  A mission case 8 is disposed at the rear of the engine 3, and the output shaft of the engine 3 enters the mission case 8, and engine power is transmitted from the output shaft of the engine 3 to the transmission mechanism in the mission case 8. It has a configuration. A chain transmission case 9 is attached to both left and right sides of the transmission case 8 so as to be rotatable about a rotation fulcrum 9a, and is extended from the transmission case 8 to the left and right outer sides on the rotation fulcrum 9a of the chain transmission case 9. The tip of the wheel drive shaft enters and transmits driving power to the transmission mechanism in the chain transmission case 9. The traveling power is transmitted to the axle 10 that extends to the rear side of the machine body and protrudes to the rear end side via the transmission mechanism in the chain transmission case 9, and the rear wheel 7 is driven to rotate. .

  A horizontal horizontal hydraulic rolling cylinder 11 that can be expanded and contracted is provided on the left side of the fuselage, and a balance rod 12 is attached to the tip of the piston rod of the horizontal horizontal rolling cylinder 11 so as to be rotatable about a vertical axis. Yes. Further, the right side of the connecting portion of the balance rod 12 is connected to the rod 13.

  Based on the detection result of the saddle height detection sensor in which the lifting hydraulic cylinder 14 provided at the center of the body is composed of a front pressure reducing wheel 15 described later, when the piston rod 14a protrudes rearward, the rod 13 and the left and right The horizontal control rolling cylinder 11 also moves rearward, and the arms 16 connected to the rod 13 and the rolling cylinder 11 rotate rearward in a side view of the machine body, and accordingly the left and right chain transmission cases 9 rotate. The left and right rear wheels 7 are moved downward about the fulcrum 9a, and the airframe is raised. On the contrary, when the piston rod 14a of the lifting hydraulic cylinder 14 is retracted forward, the left and right arms 16 are rotated forward, and accordingly, the chain transmission case 9 is rotated upward around the rotation fulcrum 9a. As a result, the left and right rear wheels 7 are raised and the aircraft is lowered.

  Further, when the left and right horizontal control rolling cylinder 11 is extended and contracted, only the left chain transmission case 9 is moved up and down, and only the left rear wheel 7 is moved up and down to tilt the machine body to the left and right. The left / right horizontal control rolling cylinder 11 is configured to operate so that the airframe is horizontally horizontal based on a detection result of a sensor (not shown) that detects right / left inclination of the airframe relative to the left / right horizontal.

  The pair of front wheels 6 is rotatably attached to an axle 19 fixed to the side of the lower end of an arm portion 18 that extends downward from the left and right sides of the front wheel support frame 17 that extends from the left and right center position below the engine 3 to the left and right. .

  The steering handle 2 is attached to the rear end portion of the body frame 20 whose front end portion is fixed to the mission case 8. The body frame 20 is disposed at the center of the left and right sides of the body and extends rearward, and extends obliquely rearward and upward from the front and rear intermediate portion. The steering handle 2 extends rearward from the rear end portion of the body frame 20 to the left and right, and the rear end portions thereof serve as grip portions 2 a and 2 a of the steering handle 2. The left and right grip portions 2a, 2a of the steering handle 2 are set to an appropriate height so that the operator can easily grip the grip portions 2a, 2a with hands. In the example shown in the figure, the grip portions 2a, 2a are divided into left and right, but the left and right rear end portions of the steering handle 2 may be connected to each other left and right, and the connecting portion may be used as the grip portion 2a.

  The vertical movement mechanism 4 for operating the seedling planting body 5 is mounted on a planting transmission case 22 having a transmission mechanism for transmitting the power for driving the seedling planting body 5 from the transmission case 8 via the transmission shaft 21. . In the planting transmission case 22, a transmission mechanism for transmitting power for driving the seedling planting body vertical movement mechanism 4 to move up and down is provided.

  The transmission mechanism in the planting transmission case 22 includes an intermittent drive mechanism that stops the vertical movement mechanism 4 and the pair of left and right seedling planting bodies 5 at the highest position of the vertical movement or at a position near the vertical movement mechanism, And a clutch mechanism that stops the vertical movement mechanism 4 and the seedling planting body 5 from moving up and down. The time for stopping by the intermittent drive mechanism is adjusted by a speed change mechanism provided in the intermittent drive mechanism, and the adjustment between the seedling planting stocks by the seedling planting body 5 is adjusted by this adjustment.

  The seedling supply device 24 that supplies seedlings to the seedling planting device 23 including the seedling planting body 5 receives seedlings from above and stores seedlings as a plurality (32 in total) of seedling containers. The cup 25, a moving mechanism 26 for moving the seedling supply cup 25 so as to pass above the seedling planting body 5, and the bottom portion of the seedling supply cup 25 at the position above the seedling planting body 5 are opened and accommodated inside. An opening mechanism 27 serving as a seedling dropping supply mechanism that drops the seedlings that have been dropped and supplies seedlings to the seedling planting body 5 is provided. The seedling supply cup 25 has a cylindrical body that opens up and down and a bottom lid 25a that opens and closes an opening on the lower side of the cylindrical body, and is connected to each other in a loop shape. The moving mechanism 26 is configured to rotate around an oval loop trajectory that is long to the left and right as viewed from above. The opening mechanism 27 is configured to open the bottom lid 25 a of the seedling supply cup 25 at a position above the seedling planting body 5. The seedling supply device 24 is configured to supply the seedlings by moving the seedling supply cup 25 around the two seedling planting bodies 5 in one round.

  A cylindrical outer peripheral portion is formed on the outer periphery of the seedling supply cup 25, and an engagement portion (round hole) that engages with the cylindrical outer periphery in a freely rotatable manner is provided to connect the two seedling supply cups 25. A plurality of bodies 28 are provided, the engaging part of the connecting body 28 is rotatably engaged with the outer peripheral part of the cylinder of the seedling supply cup 25, and the adjacent seedling supply cup 25 is rotatable about the outer peripheral part of the cylinder as a rotation axis. A plurality of seedling supply cups 25 are connected to each other. In other words, the seedling supply cup 25 and the connecting body 28 are connected like an endless chain. As a result, the seedling supply cup 25 supplies the seedlings from the seedling supply cup 25 to the seedling planting body 5 because the distance between the seedling supply cup 25 and the adjacent seedling supply cup 25 does not change regardless of whether the seedling supply cup 25 moves linearly or circularly. Thus, the seedling supply cup 25 is less likely to be displaced with respect to the seedling planting body 5, and the seedling supply is properly performed, so that an accurate seedling can be transplanted. If the opening 25a at the upper end of the seedling supply cup 25 has a shape with a small gap with the adjacent opening 25a and does not hinder the circulation of the seedling supply cup 25, the operator can remove the seedling between the seedling supply cups 25. The dropping of the seedling is prevented, and the seedling supply to the seedling supply cup 25 is facilitated. If the auxiliary seedling placement stand 101 is arranged on the worker side (seat 79 side) near the circuit path of the seedling supply cup 25, the worker can temporarily place seedlings on the auxiliary seedling placement stand 101, and the seedling supply cup 25 Can be easily replenished. The auxiliary seedling table 101 is inclined so that the side of the seedling supply cup 25 is lowered and faces the opening 25a at the upper end of the seedling supply cup 25, so that the seedling supply is further facilitated.

  If the upper end portion of the seedling supply cup 25 is made of an elastic body with a slit (such as rubber), when a plurality of seedlings have been put into the same seedling supply cup 25, or the seedling supply cup 25 is not suitable. When the seedling has been put in an appropriate posture, the upper end portion of the seedling supply cup 25 can be widened and the seedling can be easily taken out from the seedling supply cup 25. Further, if the upper end portion of the seedling supply cup 25 is an elastic body, the seedling supply cup 25 is deformed even if it interferes with the adjacent seedling supply cup 25. Therefore, the opening 25a at the upper end of the seedling supply cup 25 is not related to the adjacent seedling supply cup 25. The size can be set so that the replenishment can be easily performed, and if a plurality of openings 25a are continuously arranged as a configuration in which adjacent openings 25a are always in contact with each other, replenishment of seedlings can be facilitated.

  The moving mechanism 26 wraps the seedling supply cups 25 that are connected to each other like an endless chain by engaging them with arcuate cutouts on the outer periphery of the winding sprocket 29 provided on the left and right sides. Is driven and rotated by the power extracted from the planting transmission case 22 so that the seedling supply cup 25 rotates counterclockwise in plan view of the machine body. Each rotary shaft 30 to which the winding sprocket 29 is rotatably attached is attached to a support frame 31 that extends from the planting transmission case 22 to the left and right, and is output upward from the planting transmission case 22. 32 is transmitted through the drive sprocket 33, the chain 34, and the driven sprocket 35 to the rotating shaft 30 that rotates integrally with the driven sprocket 35. The driven sprocket 35 and the winding sprocket 29 are coupled by a bolt 36 so that both rotate integrally. Therefore, the circumferential movement path of the seedling supply cup 25 includes left and right semicircular arc-shaped portions 37 and front and rear linear portions 38 connected to the arc-shaped portion 37. The seedling supply cup 25 moves to the right in the linear portion 38 on the rear side so as to pass above the right and left seedling planting bodies 25, and the seedlings are transferred to the seedling planting body 5 in the linear portions 38. Left and right drop supply positions 39 and 40 for drop supply are set. The left and right pivot shafts 30 around which the seedling supply cup 25 circulates are arranged on the inner side of the left and right rear wheels 7 and on the rear side of the axle 10 position of the rear wheels 7. The seedling planting body 5 is arranged on the rear side of the axle 10 position of the rear wheel 7.

  The bolt 36 is screwed into the screw hole of the driven sprocket 35 from below through an arc-shaped long hole 29a provided in the winding sprocket 29 that is long in the rotational direction. Therefore, by loosening the bolt 36, the rotational phase of the driven sprocket 35 and the winding sprocket 29 can be changed and adjusted within the range of the arc-shaped elongated hole 29a. Since there is only one bolt 36, the rotational phase of the driven sprocket 35 and the winding sprocket 29 can be easily changed. The adjustment range by the arc-shaped elongated hole 29a is the pitch of the seedling supply cup 25 in the winding sprocket 29 (one half of the pitch of the first and second seedling supply cups 25b and 25c described later). Is set. The arcuate long holes 29a, bolts 36, and the like accommodate seedlings that are dropped and supplied to the seedling planting body 5 when the left and right seedling planting bodies 5 are moved upward in accordance with the change of the left and right drop supply positions 39, 40. This is a turning timing changing mechanism for changing the turning position of the seedling supply cup 25 with respect to the operation of the vertical movement mechanism 4 so that the seedling supply cup 25 to be reached reaches the drop supply positions 39 and 40.

A plurality (32 in total) of seedling supply cups 25 are exclusively used for the first seedling supply cup 25b that accommodates seedlings to be supplied at one (left side) drop supply position 39, and the other (right side) drop supply position 40 is provided. A total of 16 second seedling supply cups 25c that contain seedlings to be supplied in a separate manner, and the first seedling supply cup 25b and the second seedling supply cup 25c are alternately connected to each other. It has become. And when the 1st seedling supply cup 25b is located in one fall supply position 39, it has set so that the 2nd seedling supply cup 25c may be located in the other fall supply position 40. Accordingly, the first and second seedling supply cups 25b and 25c are moved by the moving mechanism 26 around the looped path with the same amount of movement. 39 and 40 are configured to reach the same number of times at the same timing. Then, the bottom cover 25a of the first seedling supply cup 25b that accommodates the seedling to be supplied to the left seedling planting body 5 is provided with a protrusion 41 at the right end (outer end of the circulation) with respect to the circulation direction. . On the other hand, the bottom lid 25a of the second seedling supply cup 25c that accommodates the seedlings to be dropped and supplied to the right seedling planting body 5 is provided with a protrusion 41 at the left end (inner end of rotation) with respect to the rotation direction. .
The opening mechanism 27 is provided with a support 42 that supports the bottom cover 25a from below so that the bottom cover 25a does not rotate downward below the orbit of the seedling supply cup 25. The support 42 is a seedling planting body. 5 so that the bottom cover 25a is supported by the support 42 when the seedling supply cup 25 passes through the upper position (the drop supply positions 39, 40) of the seedling planting body 5. Is released and rotated downward by its own weight and the gravity of the seedling, and the lower part of the seedling supply cup 25 is opened so as to drop the seedling downward. In addition, the rotation fulcrum of the bottom cover 25a is provided in the lower rotation side part of the seedling supply cup 25, and the bottom cover 25a is configured to open from the upper rotation side of the seedling supply cup 25.

  The support body 42 includes fixed support bodies 42a, 42b, 42c, and 42d fixed to the airframe, and movable support bodies 42e and 42f that can change positions relative to the airframe. The fixed support bodies 42a, 42b, 42c, and 42d are a main fixed support body 42a that covers the entire area of the left and right arc-shaped portions 37 and the front linear portion 38 in the circulation locus of the seedling supply cup 25, and a rear linear portion. 38, first, second and third sub-fixing supports 42b, 42c and 42d are provided. The main fixed support 42a and the first, second, and third sub fixed supports 42b, 42c, and 42d are made of bar material. The main fixed support 42a is extended along the circular trajectory of the seedling supply cup 25 so as to contact the center of the bottom cover 25a, and opens the bottom lid 25a of the first and second seedling supply cups 25b and 25c. Support not to be. The first sub-fixing support 42b is provided in a straight line along the circulation locus of the seedling supply cup 25 so as to contact the protrusion 41 provided at the outer end of the rotation in the bottom lid 25a of the first seedling supply cup 25b. The bottom cover 25a of the first seedling supply cup 25b is supported so as not to open. The first sub-fixing support 42b supports the bottom cover 25a by closing and supporting only the bottom cover 25a of the first seedling supply cup 25b from the middle of the rectilinear portion 38 in the circumference of the seedling supply cup 25. Is provided at a position on the right side of the linear portion 38 on the rear side and on the upper side of the bottom lid of the main fixed support 42a so that the subsequent main fixed support 42a is taken over. The second sub-fixing support 42c is provided in a straight line along the circumferential locus of the seedling supply cup 25 so as to contact the protrusion 41 provided on the inner end of the circumference of the bottom lid 25a of the second seedling supply cup 25c. The bottom cover 25a of the second seedling supply cup 25c is supported so as not to open. The second sub-fixing support 42c takes over the support of the bottom cover 25a of the main fixed support 42a in the circumference of the seedling supply cup 25 and supports only the bottom cover 25a of the second seedling supply cup 25c. It is provided at a position on the left side of the linear portion 38 on the rear side and on the lower side of the bottom cover around the main fixed support 42a. The third sub-fixing support 42d is configured to contact the center of the bottom cover 25a, and the bottom cover 25a of the first seedling supply cup 25b from the middle of the linear portion 38 on the rear side in the circumference of the seedling supply cup 25. Is provided with a lower inclined portion toward the upper side of the circuit, and is closed while guiding the bottom lid 25a of the first seedling supply cup 25b opened at the inclined portion to the upper side. It is provided at a substantially central position of the portion 38 and in parallel with the start end (left end) of the first sub-fixing support 42b around the bottom lid. The end (right end) of the third sub-fixing support 42d in the bottom lid circulation is positioned on the upper side (left side) in the bottom lid rotation from the termination (right end) of the second sub-fixing support 42c in the bottom lid rotation. is doing. In addition, the start end part in the bottom cover circulation of the main fixed support 42a is provided with an inclined part that is lower on the upper side of the circulation so as to close the bottom cover 25a of the second seedling supply cup 25c, and is opened at the inclined part. The bottom lid 25a of the seedling supply cup 25c is closed while being guided upward.

  The first sub-fixing support 42b is provided by fixing the right end to a first support member 43 extending from the support frame 31 to the right end of the linear portion 38 on the rear side. The second sub-fixing support 42c is fixed to the second support member 44 extending from the support frame 31 to the left end of the linear portion 38 on the rear side, and the right end is rearward from the planting transmission case 22. The third support member 45 extends and is fixedly provided. The third sub-fixing support 42d is fixedly provided on the third support member 45. The main fixed support 42 a is fixedly provided on the upper surfaces of the first support member 43 and the second support member 44.

  The moving supports 42e and 42f are composed of a first moving support 42e and a second moving support 42f provided on a part of the linear portion 38 on the rear side. The first moving support 42e and the second moving support 42f are made of a plate material. The first moving support 42e is provided in a straight line along the orbit of the seedling supply cup 25 so as to contact the protrusion 41 provided on the outer end of the circumference of the bottom lid 25a of the first seedling supply cup 25b. The first seedling supply cup 25b is configured to support the bottom cover 25a of the first seedling supply cup 25b so as not to open, and the first seedling supply cup is taken over by supporting the bottom cover 25a of the main fixed support 42a around the seedling supply cup 25. In order to support only the bottom cover 25a of 25b, it is provided on the left side of the linear portion 38 on the rear side and on the lower side of the bottom cover around the main fixed support 42a. The first moving support body 42e is fixedly supported to the second support member 44 by a mounting bolt 47 penetrating a long hole 46 provided in the second support member 44 in the left-right direction. It is configured to change the mounting position in the direction. The mounting bolt 47 is located on the outer side (rear side) of the surrounding area of the seedling supply cup 25, and can be easily tightened or loosened from the rear side without the seedling supply cup 25 getting in the way.

  The second moving support body 42f includes a linear portion along the circulation locus of the seedling supply cup 25 so as to abut on the protrusion 41 provided on the inner end of the rotation of the bottom lid 25a of the second seedling supply cup 25c, The second seedling supply cup 25c is configured to support the bottom cover 25a so as not to open. In the circumference of the seedling supply cup 25, the second seedling supply cup 25c takes over the support of the bottom cover 25a of the second auxiliary fixed support 42c. At the position on the right side of the linear portion 38 on the rear side so as to support the bottom lid 25a of the supply cup 25c and at the end of the main lid 42a on the upper side of the circumference of the bottom lid (the arc-shaped portion 37 on the right side in the circumferential locus) (Starting end portion) and is provided with a space. The second moving support 42f is fixedly supported on the third support member 42d by a mounting bolt 49 penetrating a long hole 48 that is long in the left-right direction provided in the second moving support 42f, and is supported by the long hole 48. The configuration is such that the mounting position in the left-right direction can be changed. The second moving support 42f has a U-shape in plan view that is divided into two parts: a position adjusting portion provided with a long hole 48 and a bottom lid supporting portion that supports the bottom lid 25a. The second sub-fixing support 42c is disposed between the position adjusting portion and the bottom lid support portion, and the bottom lid 25a can be reliably supported by taking over the second sub-fixing support 42c. . Further, when the mounting position of the second movable support 42f is set to the position (left end position) closest to the bottom cover around the long hole 48, the bottom cover support part is connected to the second sub-fixed support 42c and the third support fixed part 42c. The second moving support 42f and the second and third sub-fixing supports 42c and 42d are arranged in a compact manner. The mounting bolt 49 is located on the inner side (front side) of the surrounding area of the seedling supply cup 25 and can be easily tightened or relaxed from above without the seedling supply cup 25 getting in the way. In addition, when the seedling stand for placing a spare seedling inside the circumference area of the seedling supply cup 25 is configured, a hole is formed at a position above the mounting bolt 49 in the seedling stand, and the mounting bolt 49 is inserted from the hole. It can be configured to be easily tightened or relaxed. Moreover, the said hole can be combined with the drain hole for draining the water collected on the seedling stand.

  Two elongated holes 46 and 48 and two mounting bolts 47 and 49 for changing the positions of the first moving support 42e and the second moving support 42f are provided on the left and right sides, respectively, and the first moving support 42e. In addition, the second moving support 42f is configured to be movable in the left-right straight direction. Further, the amount of position change of the first moving support 42e and the second moving support 42f is regulated by the long holes 46 and 48 to the arrangement pitch in the seedling supply cup 25, and planting which will be described later by this regulating means. The drop supply positions 39 and 40 are not adjusted to an incorrect position by changing the position. Accordingly, when the first seedling supply cup 25b moves to the position where the bottom cover 25a of the first seedling supply cup 25b is not supported at the end (right end) on the lower side of the bottom cover around the first moving support 42e. The bottom lid 25a of the first seedling supply cup 25b is opened. That is, the end (right end) of the first moving support 42e on the lower side around the bottom lid is the first (left side) drop supply position 39. Further, when the second seedling supply cup 25c moves to a position where the bottom cover 25a of the second seedling supply cup 25c is not supported at the end (right end) on the lower side of the bottom cover around the second moving support 42f. The bottom lid 25a of the second seedling supply cup 25c is opened. That is, the end (right end) of the second moving support 42f on the lower side of the bottom lid circulation is the second (right) drop supply position 40. The second sub-fixing support 42c constitutes an opening restricting means for preventing the bottom cover 25a of the second seedling supply cup 25c from being opened at the first drop supply position 39 on the upper side of the circuit.

  Therefore, when the first moving support 42e is positioned on the most peripheral lower side (right side) by the long hole 46, and the second moving support 42f is positioned on the most peripheral upper side (left side) by the long hole 48, the first The distance between the drop supply position 39 and the second drop supply position 40 is the smallest, and the space between the planting strips is the narrowest. At this time, the interval between the left and right drop supply positions 39, 40 is three times the arrangement pitch in the seedling supply cup 25, that is, 1.5 times the arrangement pitch in the first and second seedling supply cups 25b, 25c. On the other hand, when the first moving support 42e is positioned on the most circumferential upper side (left side) by the long hole 46, and the second moving support 42f is positioned on the most lower rotating side (right side) by the long hole 48, the first The distance between the second drop supply position 39 and the second drop supply position 40 is the largest, and the space between the planting strips is the widest. At this time, the distance between the left and right drop supply positions 39, 40 is 5 times the arrangement pitch in the seedling supply cup 25, that is, 2.5 times the arrangement pitch in the first and second seedling supply cups 25b, 25c. Accordingly, each drop supply position 39, 40 can be changed in position by the arrangement pitch in the seedling supply cup 25, and the distance between the left and right drop supply positions 39, 40 is the first and second seedlings. It changes by the distance of an integral multiple (1 times) of the arrangement pitch in the supply cups 25b, 25c (an even multiple (2 times) of the arrangement pitch in the seedling supply cup 25).

  The seedling planting device 23 moves up and down between a beak-shaped seedling planting body 5 whose tip is directed downward, and a position where the lower end of the seedling planting body 5 is above the farm scene and a position below the farm scene. A vertical movement mechanism 4 for moving the seedling planting body 5 up and down, a closed state in which the lower end portion of the beak-shaped seedling planting body 5 is closed and a seedling is received from above and a seedling can be accommodated inside, and the lower end of the seedling planting body 5 An opening / closing mechanism 50 for opening and closing the seedling planting body 5 is provided in an open state in which the part opens left and right and the seedling accommodated inside can be released downward. A stopper plate 102 is provided a little above the lower end of the seedling planting body 5 and on the outer periphery of the seedling planting body 5, and the seedling planting depth can be made uniform during seedling planting by the stopper plate 102. The stopper plate 102 includes a protruding portion 102a that extends outward in the left-right direction of the machine body, and the protruding portion 102a can form a drainage groove on the soil surface that guides water to the ridge groove side. You can keep it from collecting. The stopper plate 102 does not contact the soil surface if the stopper plate 102 contacts the pressure-reducing wheel support frame 100, which will be described later, by lowering the seedling planting body 5 to restrict the seedling planting depth. The soil surface can be kept free of traces that can cause puddles.

  This seedling planting machine 1 has a configuration of a plurality of row plantings in which a plurality of seedling planting bodies 5 are arranged side by side at set intervals. In this example, it is set as the structure of the two-row planting which arrange | positioned the seedling planting body 5 side by side with the set space | interval at a set interval.

  The two seedling planting bodies 5 are attached integrally to the vertical movement mechanism 4 provided on the left and right side portions of the planting transmission case 22. A beak-like seedling planting body 5 with the tip facing downward is composed of a left seedling planting body 5L and a right seedling planting body 5R, and is divided into left and right parts. The body 5R rotates in the left-right direction to open the lower end. In addition, the right and left seedling planting bodies 5 are configured to vertically move and open and close synchronously by the vertical movement mechanism 4 and the opening / closing mechanism 50, and to plant two seedlings in a row on the farm field.

  The seedling guide 51 is a cylindrical body that is provided above the seedling planting body 5 and guides the seedling supplied from the seedling feeding device 24 into the seedling planting body 5. The seedling planting body 5 can be accurately supplied.

  The vertical movement mechanism 4 of the seedling planting body 5 is provided on both right and left sides of the planting transmission case 22. Specifically, the upper and lower lift links 52, 53 are connected to the seedling planting body 5 by attaching the front part to the shaft projecting to the left and right sides of the planting transmission case 22 so that the front part can freely rotate up and down. , A drive shaft 54 that rotates from the side of the planting transmission case 22, a drive arm 55 that is attached so as to rotate integrally with the drive shaft 54, a rotation outer peripheral side end portion of the drive arm 55, and the aforementioned An interlocking arm 56 is rotatably connected to the upper lifting link 52. The rear end portions (rotating tip portions) of the upper and lower elevating links 52 and 53 are pivotally attached to and connected to the connecting member 57. The seedling planting bodies 5 are respectively attached to the left and right inner sides of the vertical movement mechanism 4 via the connecting members 57.

  Therefore, when the drive arm 55 is driven and rotated by the rotation of the drive shaft 54, the elevating links 52 and 53 move up and down, and the left and right seedling planting bodies 5 move up and down. The lower end portion of the seedling planting body 5 is positioned above the field scene at the ascending position of the vertical movement, and the lower end portion of the seedling planting body 5 is positioned below the field scene at the descending position.

  Further, the rotation fulcrum shaft 58 of the upper elevating link 52 is provided at a position that is eccentric from the center axis of the output shaft 59 at the tip of the planting output shaft 59 that projects from the planting transmission case 22 and rotates. The rotation of the planting output shaft 59 moves around the axis of the planting output shaft 59 while rotating with an eccentric amount (the distance between the pivot fulcrum shaft 58 and the axis of the planting output shaft 59) as a radius. When the upper fulcrum shaft 58 moves up and down during the up-and-down movement of the upper elevating link 52, the seedling planting body 5 is tilted back and forth during the up-and-down movement, and the seedling planting body 5 is looped in a side view. It is configured to move up and down along the operating locus.

  Next, the opening / closing mechanism 50 of the seedling planting body 5 will be described. The end of the inner wire 61a of the opening / closing cable 61 is connected to the tip of the left opening / closing arm 60 provided on the left seedling planting body 5L, and the right opening / closing arm is provided on the right seedling planting body 5R. An end of the outer cable 61b of the opening / closing cable 61 is connected to the distal end of 62, and an operating arm 64 rotatably attached to a rotation fulcrum shaft 63 pivotally attached to the base of the lower lift link 53 is provided. The other end of the inner wire 61a of the opening / closing cable 61 is connected to the distal end of the operating arm 64, and the other end of the outer cable 61b of the opening / closing cable 61 is fixedly attached to the machine body side. FIG. 5 shows the left seedling planting device 23, and the right seedling planting device 23 is symmetrical with the left seedling planting device 23, so that the front end portion of the left opening / closing arm portion is shown. The end portion of the outer cable of the opening / closing cable is connected to the end portion, and the end portion of the inner wire of the opening / closing cable is connected to the tip portion of the right opening / closing arm portion. Then, the operating arm 64 is set under the action of a cam attached so as to rotate integrally with the planting output shaft 50 that rotates and moves the rotation fulcrum shaft 58 pivotally attached to the base of the upper lifting link 52. It is set as the structure rotated to the front side at timing. As a result, when the seedling planting body 5 moves up and down by the drive rotation of the drive shaft 54 and reaches the lowered lower end position, the operating arm 64 is rotated forward by the change of the operating position of the cam, and the outer cable of the opening / closing cable 61 The inner wire 61a is pulled to the right with respect to 61b and the left opening / closing arm 60 and the right opening / closing arm 62 rotate so as to approach each other, and the right seedling planting body 5R rotates to the right. The left seedling planting body 5L is rotated to the left in conjunction with the above, and the lower side of the seedling planting body 5 opens to the left and right, and opens downward. Then, the seedling planting body 5 rises and the operating arm 64 rotates to the original position (rear side) with respect to the seedling planting body 5 due to the change of the cam action position, so that the inner wire 61a of the opening / closing cable 61 is loosened. The lower part of the seedling planting body 5 opened to the left and right is closed. Thus, since the seedling planting body 5 is configured to be opened and closed by the opening / closing cable 61, the opening / closing cable 61 has a higher degree of freedom of connection than the conventional opening / closing mechanism using a rod or link, and therefore operates forward and backward. The actuating arm 64 can rotate the left seedling planting body 5L and the right seedling planting body 5R in different directions (left and right directions), and a desired opening / closing amount of the seedling planting body 5 with a small amount of actuation of the actuation arm 64 Can be obtained. Note that the left seedling planting body 5 </ b> L and the right seedling planting body 5 </ b> R are urged to rotate by the spring 65 toward the side where the lower portion of the seedling planting body 5 is closed.

  Respective rotation front end portions (rear end portions) of the upper and lower lift links 52 and 53 of the vertical movement mechanism 4 are connected to a connection member 57 via upper and lower connection shafts 66 and 67, respectively. The connecting member 57 includes a plate 68 that is triangular in a side view on the left and right sides, and the left and right plates 68 sandwich the tip ends of the upper and lower elevating links 52 and 53. A boss 69 extending in the left-right direction is provided. In addition, the connecting shafts 66 and 67 and the boss 69 are arranged in the vicinity of each triangular apex of the plate 68 in a side view, and the boss 69 is arranged on the rear side of the upper and lower connecting shafts 66 and 67. The upper and lower connecting shafts 66 and 67 and the upper and lower elevating links 52 and 53 do not get in the way when a position adjusting shaft 70 described later is slid with respect to the boss 69. The left and right plates 68 are substantially equilateral triangles, and the upper and lower connecting shafts 66 and 67 are turned upside down so that the connecting member 57 can be attached. The boss hole of the boss 69 has a hexagonal shape (polygonal shape). On the other hand, a hexagonal (polygonal) position adjusting shaft 70 extending in the left-right direction is fixedly provided at the base of the seedling planting body 5. Accordingly, the position adjusting shaft 70 is inserted into the boss 69, the seedling planting body 5 is supported by the connecting member 57, and the position adjusting shaft 70 is slid with respect to the boss 69 and moved in the left-right direction. The left and right positions of the body 5 can be changed. The position adjustment shaft 70 extends from the connecting member 57 to the left and right inside, and the seedling planting body 5 is provided at the inner end in the left and right direction of the machine body. The change in the left and right position of the seedling planting body 5 is equivalent to the arrangement pitch in the seedling supply cup 25 so that the seedling planting body 5 is positioned below the drop supply positions 39 and 40 in accordance with the change of the drop supply positions 39 and 40. The length of the position adjusting shaft 70 is set so that the distance can be changed. That is, the interval between the left and right seedling planting bodies 5 can be changed by an integral multiple (1) of the arrangement pitch in the first and second seedling supply cups 25b, 25c, and the boss 69, the position adjusting shaft 70, etc. A planting position changing mechanism that can move the seedling planting body 5 is configured. The position adjusting shaft 70 can be fixed so as not to move left and right with respect to the boss 69 by a set bolt 71 provided on the boss 69. When the position adjusting shaft 70 is moved left and right, the set bolt 71 is loosened and moved. Yes. The set bolt 71 is provided on the rear side of the boss 69 and the position adjusting shaft 70, and can be easily tightened or loosened from the rear side without the lifting links 52 and 53 being in the way. In addition, the opposing vertex of the hexagonal shape (polygonal shape) of the cross section of the position adjusting shaft 70 is positioned vertically, and the section coefficient for bending in the vertical direction is improved. The strength required to support the cantilever 5 can be obtained. In addition, a groove 72 serving as a guide for the right and left position of the seedling planting body 5 is provided on the outer periphery of the position adjusting shaft 70 at an appropriate position. By aligning the groove 72 with the end of the boss 69, a narrow planting space can be formed. It can be adjusted to the left and right positions of the seedling planting body 5 at the time of the ligaments, and the position of the seedling planting body 5 can be easily changed.

  Then, while the vertical movement of the seedling planting body 5 is performed for one cycle by the vertical movement mechanism 4, the first and second seedling supply cups 25 b and 25 c are arranged for each arrangement pitch (2 of the seedling supply cup 25 in a row). Move around). The timing at which the bottom cover 25a of the seedling supply cup 25 is opened at the drop supply positions 39 and 40 is set to be when the seedling planting body 5 has been raised directly below the seedling supply cup 25. Thereby, the seedling supply cup 25 can supply the seedlings simultaneously without passing the seedling supply leakage to the two seedling planting bodies 5 while passing through the upper part of the two seedling planting bodies 5 in series. It will be possible to supply seedlings to the two seedling planting bodies 5 without leaving a seedling supply cup 25 that has not been supplied with seedlings after passing over the planting body 5, and the seedling supply operation can be performed with a margin, In addition, seedlings can be reliably supplied to the two seedling planting bodies 5.

  In addition, the seedling planting machine 1 has front and rear pressure wheels 15 and 73. The pair of front pressure wheels 15 not only level the surface before planting the seedling but also provide a sensor wheel for adjusting the height of seedling planting. It also has a function of adjusting the height of the airframe by operating a hydraulic cylinder (not shown) in the mission case 8 according to the grounding position of the front pressure reducing wheel 15 and operating the lifting hydraulic cylinder 14. . Further, the rear pressure ring 73 reduces the soil around the seedling while covering the periphery of the planted seedling. Therefore, the post-pressing wheel 73 becomes a soil covering body that covers the periphery of the seedling planted by the seedling planting body 5. The front pressure wheel 15 and the rear pressure wheel 73 are attached to and supported by a pressure wheel support frame 100 provided for each line. The pressure-reducing wheel support frame 100 is provided on the machine body frame 20 so as to be movable up and down via a rotation fulcrum shaft 100a, and extends from the front side to the rear side of the seedling planting body 5 on the inner side in the left-right direction of the corresponding seedling planting body 5. It extends. Therefore, the pressure-reducing wheel support frame 100 becomes a covering body support frame extending from the front side to the rear side of the seedling planting body 5 on the opposite side to the position adjusting shaft 70 with respect to the seedling planting body 5.

  The front and rear pressure-reducing wheels 15 and 73 can be accommodated on the upper side by operating the lever 74 when the vehicle is turning. A left and right support shaft 76 extending in the left-right direction is provided at the pivoting tip of an arm 75 that rotates up and down integrally with the lever 74, and the lower end of the vertical support shaft 77 provided so as to penetrate the left and right support shaft 76 vertically. The rear end portion of the pressure-reducing wheel support frame 100 is connected to the portion. In addition, the said up-and-down support shaft 77 is provided for every planting strip, and two are provided in right and left. The left and right support shafts 76 include left and right movable parts through which the upper and lower support shafts 77 penetrate, and a fixed part connected to the arm 75 between the left and right movable parts, and the movable part is the fixed part. On the other hand, it is configured to slide in the direction of the shaft 76 (left and right direction). The pressure-reducing wheel support frame 100 is configured to slide along the rotation fulcrum shaft 100a in the direction of the rotation fulcrum shaft 100a (left-right direction). Therefore, according to the change in the left and right positions of the left and right seedling planting bodies 5, the movable part can be slid to move the front pressure wheel 15 and the rear pressure wheel 73 left and right.

  Further, a seat 79 facing backward is provided above the bonnet 78 so as to face the seedling supply device 24 side, and a flat step 80 for placing a foot between the seedling supply device 24 is provided. The seat 23 is supported by the airframe via a support frame 81 that extends upward through one of the left and right sides (right side) of the bonnet 78.

  The step 80 includes a main step 82 disposed between the seat 79 and the seedling supply device 24 in plan view of the body, and sub-steps 83 provided on the left and right sides of the seat 79 and the bonnet 78. The sub-step 83 extends forward and backward from the front end portion of the airframe to near the main step 82, the front portion 83a is configured to be one step lower than the rear portion 83b, and allows an operator to get on and off from the front end portion of the airframe. It is configured. An elevating mechanism (arm 11, rolling cylinder 15, rod 14, etc.) for elevating the wheel (rear wheel) 7 can be arranged below the rear part 83 b which is the upper stage of the sub-step 83, and the space of the fuselage can be reduced. The aircraft is made compact by making effective use. Further, a chain transmission case 9 serving as a traveling transmission case that rotates up and down can be disposed below the rear portion of the substep 83 in accordance with a tread change of the wheel (rear wheel) 7. In addition, a rising portion 82a is provided at the front end of the main step 82 so as to be inclined upward and the operator's foot sitting on the seat 79 contacts the vertical movement mechanism 4 of the seedling planting device 23 by the rising portion 82a. Protects against this. Further, by positioning the rising portion 82a below the seedling supply device 24, the longitudinal length of the machine body can be shortened. Moreover, the main step 82 is provided with the rising portion 82a, whereby the strength is improved. It should be noted that at the rising portion 82a, the driving of the left and right rear wheels 7, the seedling planting device 23, and the seedling feeding device 24 for turning on and off the main clutch lever 84 and the left and right rear wheels 7 can be cut off. Left and right side clutch pedals 85 are provided so that an operator in the seat 79 can stop the aircraft and correct the traveling direction of the aircraft.

  In the above description, the sub-step 83 is provided on both the left and right sides. However, the sub-step 83 may be provided on only one of the left and right sides. In this case, the sub-step 83 may be provided on the side without the support frame 81 (left side). If the step 83 is provided, the support frame 81 can easily get on and off by the sub-step 83 without obstructing.

  A front end of the airframe between the left and right front wheels 6 is provided with a front end sensor 86 that contacts the upper surface of the front U and detects the end of the front U. The front end sensor 86 is free from wrinkles due to the forward movement of the front body. However, it is configured to detect that the terminal end of the bag is reached by reaching the place and not sensing the upper surface of the bag. Based on detection of the heel end by the heel end sensor 86, the main clutch is automatically disengaged to stop the driving of the left and right rear wheels 7, the driving of the seedling planting device 23 and the seedling supplying device 24, and the machine body is stopped. At the same time, an alarm (for example, a buzzer or the like) is issued to notify the operator. As a result, the worker sitting on the seat 79 faces backward with respect to the advancing direction of the aircraft, and since it concentrates on the seedling replenishment work, it is difficult to confirm the front of the aircraft and does not notice that the aircraft has reached the end of the heel. Although there is a risk of causing an accident such as a collision with surrounding structures, the dredge end sensor 86 automatically stops the aircraft at the end of the dredge and notifies the end of the dredge by an alarm. The seedling replenishment work can be concentrated on the seedling supply device 24 without worrying about the situation in front of the machine body and the position of the end of the heel, thereby improving the planting work efficiency. The heel end sensor 86 is disposed at a position to the right of the left and right center of the aircraft (tread of the left and right wheels 6 and 7), and the vertical movement accompanying the vertical movement of the left rear wheel 7 by the rolling cylinder 11 is small. The upper surface of the ridge can be detected accurately and stably. In addition, the heel end sensor 86 is a left-right position (a right front pressure wheel 15 and a seedling planting position on the right side) that avoids the front pressure wheel 15 and the seedling planting position of the seedling planting body 5 for controlling the height of the aircraft to the ground. Since it is provided on the left side), the soil at the planting position is not roughened and the planting accuracy is not lowered.

  Also, near the steering handle 2, there are a main clutch lever 87 for manually turning on and off the left and right rear wheels 7, the seedling planting device 23 and the seedling feeding device 24, a seedling planting device 28 and a seedling feeding device 32. And a planting operation lever 88 for manually turning on and off only the drive. The planting operation lever 88 can be used to operate the lifting hydraulic cylinder 14 to manually lift and lower the machine body. Then, a sensor (detection means) for detecting the operation position of the planting operation lever 88 is provided, and only when the seedling planting device 23 and the seedling supply device 24 are operated in the drive state by the planting operation lever 88, It is configured such that the automatic stop control and alarm of the airframe are activated by the aforementioned heel end sensor 86. As a result, the automatic stop control and alarm of the aircraft can be activated only during planting work, and the aircraft endless sensor 86 is unnecessarily detected by the heel end sensor 86 not detecting the upper surface of the heel when traveling or turning at the heel end. Can be prevented, and the operability is improved. A seating sensor for detecting that an operator is seated on the seat 79 is provided in place of or in combination with the above-described automatic stop control of the machine and the operation of the alarm by the planting operation lever 88. Only when the person is seated, the automatic stop control and warning of the aircraft may be activated. Moreover, it can be set as the structure which a warning is act | operated first by the detection of the end of the hull by the hail end sensor 56, and the body stops automatically after the predetermined time (several seconds later). The airframe may be automatically stopped by stopping the engine 3.

  On the left and right sides of the seat 79, a seedling stand 89 is disposed. The seedling stage 89 lacks a part of the rectangular bottom surface of the seedling storage frame (seedling box, seedling tray, seedling container, etc.) to be placed, and the outer edge of the lacked part is the seedling supply device 24. It has a shape that follows the arc-shaped portion 37 of the orbital movement trajectory of the seedling supply cup 25 so that it does not interfere with the seedling supply to the seedling supply cup 25 when the seedling storage frame is not placed. . In addition, the seedling stage 89 overlaps above a part of the seedling supply cup 25 of the seedling supply device 24, but is configured to be movable to the side of the machine body by the moving link mechanism 90, so that an operator sitting on the seat 79 can It can be arbitrarily moved to a position where it is easy to perform seedling replenishment work, and when getting on and off from the front end of the aircraft via step 80, it can be moved to the outside in the left and right direction from step 80 (sub step 83) so as not to obstruct getting on and off, When loading into a truck or storing in a warehouse, it can be moved outward in the left-right direction to reduce the left-right width of the aircraft. In addition, it is good also as a structure which can move the seedling mounting stand 89 to the left-right direction outer side to the position which does not overlap above the seedling supply cup 25 of the seedling supply apparatus 24. FIG. Further, the moving link mechanism 90 has a structure in which the link length of each link is different. When the seedling mounting base 89 is moved inward in the left-right direction for supplying seedlings to the seedling supply device 24, the seedlings are transferred. The stage 89 is configured to face the rearward and rearward direction. Thereby, the seedling replenishment work can be facilitated.

  As described above, in this two-row seedling planting machine, between narrow planting strips that is three times the arrangement pitch in the seedling supply cup 25, that is, 1.5 times the arrangement pitch in the first and second seedling supply cups 25. When planting seedlings, the left and right seedling planting bodies 25 are moved closer to each other by the planting position changing mechanism including the boss 69 and the position adjusting shaft 70, and the movable part of the left and right support shaft 76 is slid to move left and right. The first pressure support wheel 73 is moved closer to each other, the first moving support body 42e is positioned on the most peripheral lower side (right side) by the long hole 46, and the second moving support body 42f is moved to the long hole 48. To position the left and right drop supply positions 39 and 40 closer to each other. And when planting seedlings between narrow planting strips that is 5 times the arrangement pitch in the seedling supply cup 25, that is, 2.5 times the arrangement pitch in the first and second seedling supply cups 25b, 25c, The seedling planting body 5 is moved to the side away from each other by the planting position changing mechanism, the movable part of the left and right support shaft 76 is slid to move the rear pressing wheel 73 of the left and right planting strips to the side away from each other, The one moving support 42e is positioned on the most peripheral upper side (left side) by the long hole 46, and the second moving support 42f is positioned on the most peripheral lower side (right side) by the long hole 48, and the left and right drop supply positions 39 , 40 are moved to the side away from each other, and the phase of the winding sprocket 29 is changed in the seedling supply cup 25 by the rotation timing changing mechanism including the arc-shaped long hole 29a and the bolt 36. When the left and right seedling planting bodies 5 are moved up by changing the row pitch (half the arrangement pitch in the first and second seedling supply cups 25b and 25c), the first (left side) drop The seedling supply cup 25 for the operation of the vertical movement mechanism 4 so that the first seedling supply cup 25b reaches the supply position 39 and the second seedling supply cup 25c reaches the second (right side) drop supply position 40. Change the rotation position (phase) of.

  That is, this multi-row seedling planting machine is provided with a seedling planting body 5 configured to vertically move with a predetermined movement locus by a vertical movement mechanism 4 to plant seedlings in a field, and the right and left seedling planting bodies. A seedling supply device 24 for supplying seedlings to the seedling 5 is provided. The seedling supply device 24 includes a seedling container composed of a plurality of seedling supply cups 25 for storing seedlings, and a plurality of seedling containers 25 arranged in a predetermined arrangement. A moving mechanism 29 that is arranged in a loop at a pitch and sequentially moves so as to pass above each seedling planting body 5, and a drop supply in which the seedling container 25 is positioned above the seedling planting body 5 by the moving mechanism 29 An open mechanism 27 serving as a seedling dropping supply mechanism for dropping and supplying the seedlings accommodated in the seedling container 25 to the seedling planting body 5 moved up by the vertical movement mechanism 4 when moved to the positions 39, 40, and the seedling dropping supply mechanism 27 is a seedling planting body 5 on each of the left and right sides. Corresponding left and right drop supply positions 39, 40 are provided, and a first seedling container 25b that stores seedlings to be supplied at one fall supply position 39 and seedlings to be supplied at the other fall supply position 40 are stored. And a second seedling container 25c to be provided separately, and the first and second seedling containers 25b and 25c reach the respective drop supply positions 39 and 40 the same number of times by circular movement by the moving mechanism 26. That is, it is set as the structure which arranged the 1st and 2nd seedling container 25b, 25c with the same arrangement pitch, and the mutual space | interval of the right and left seedling planting bodies 5 along the circumference movement path | route of the seedling container 25 is 1st and 2nd. A planting position changing mechanism capable of moving the seedling planting body 5 so as to change by an integral multiple of the arrangement pitch in the seedling containers 25b and 25c is provided, and the seedling dropping supply mechanism 27 is used for seedling planting by the planting position changing mechanism. The drop supply positions 39 and 40 can be changed so that the distance between the left and right drop supply positions 39 and 40 can be changed according to the amount of movement. The seedling drop supply mechanism 27 is configured to be able to change both the left and right drop supply positions 39, 40 to the opposite sides, and to the left and right according to the change of the left and right drop supply positions 39, 40, respectively. Seedling accommodation with respect to the operation of the vertical movement mechanism 4 so that the seedling accommodation body 25 that accommodates the seedlings to be supplied to the seedling planting body 5 when the seedling planting body 5 is moved up reaches the fall supply positions 39 and 40. A turning timing changing mechanism for changing the turning position of the body 25 is provided.

  Accordingly, the seedling supply device 24 moves the plurality of seedling containers 25 around the loop path by the moving mechanism 26, and the seedling dropping supply mechanism 27 causes the first seedling container 25 b to fall on one side (left side). When the second seedling container 25c reaches the other (right side) drop supply position 40, the seedling is dropped and supplied to the lower seedling planting body 5 and left and right. The up-and-down seedling planting body 5 moves up and down along a predetermined operating locus by the up-and-down moving mechanism 4 to plant seedlings in the field. And when changing between planting strips, the mutual distance of the right and left seedling planting bodies 5 along the circular movement path of the seedling housing body 25 by the planting position changing mechanism is the first and second seedling housing bodies 25b, The seedling planting body 5 is moved so as to change by an integral multiple of the arrangement pitch in 25c, and the left and right drop supply positions 39, 40 are moved in accordance with the amount of movement of the seedling planting body 5 by the planting position changing mechanism. The drop supply positions 39 and 40 can be changed so that the interval of the seedlings changes, and the seedling planting body 5 can be dropped and supplied to the seedling planting body 5 at the timing when the seedling planting body 5 is moved up by the vertical movement mechanism 4. The seedling can be properly supplied to 5. In addition, when changing between planting strips, both the right and left seedling planting bodies 5 are moved to the opposite sides by the planting position changing mechanism, and both the left and right fall supply positions 39 and 40 are changed to the opposite sides, When the turning position of the seedling container 25 is changed with respect to the operation of the vertical movement mechanism 4 by the timing changing mechanism, and the right and left seedling planting bodies 5 are moved upward according to the change of the left and right drop supply positions 39 and 40, the seedlings In order for the seedling container 25 that stores seedlings to be supplied to the planting body 5 to reach the drop supply positions 39 and 40, the seedling planting body 5 is moved up by the vertical movement mechanism 4. The seedlings can be dropped and supplied to the seedling 5, the seedlings can be properly supplied to the seedling planting body 5, and the left and right seedling planting positions can be moved to the opposite side to move the right and left between the desired planting lines. In the center of the kite straddling with 6 and 7 wheels It is possible to change the planting position to instill seedlings symmetrical positions with.

  Therefore, even if the spacing between the planting lines is changed, the seedling can be properly supplied to the seedling planting body 5 and the planting accuracy of the seedling can be maintained. Moreover, the distance between planting strips can be easily changed by moving the seedling planting body 5 and changing the drop supply positions 39 and 40. In particular, even if the spacing between the planting lines is changed, the correspondence between the left and right drop supply positions 39, 40 and the seedling supply cups 25b, 25c that accommodate the seedlings to be supplied at the drop supply positions 39, 40 does not change. The left and right drop supply positions 39, 40 can be changed with a simple configuration of changing the positions of the first moving support 42e and the second moving support 42f, and the rotation position (phase) of the seedling container 25 by the rotation timing changing mechanism. ) Can be changed without removing the winding of the chain 34 and the seedling supply cup 25 with a simple configuration of changing the rotational phase of the winding sprocket 29 with respect to the driven sprocket 35, and the change between the planting strips becomes easy. Note that the position change of the seedling planting body 5 and the pressure-reducing wheel 73 can be easily performed because the movable portions of the position adjusting shaft 70 and the left and right support shafts 76 are simply slid.

  In addition, according to the above, the amount of change between the planting strips is a distance that is an integral multiple of the arrangement pitch of the first and second seedling containers 25b, 25c, but this hinders the supply of seedlings to the seedling planting body. The amount of change between planting strips is an integral multiple of the arrangement pitch in the first and second seedling containers 25b, 25c, for example, by slightly changing the left and right position of the seedling planting body relative to the drop supply position. Different from the distance, it is also possible to set between desired planting strips. For example, depending on the configuration of the seedling container and the seedling planting body, it can be set to 320 mm between narrow planting strips and 480 mm between wide planting strips.

  In addition, it is set as the structure which can change the position of each fall supply position 39,40 by the distance of the odd multiple of the arrangement pitch in the seedling supply cup 25 not only in the above-mentioned structure, but the mutual space | interval of the right and left fall supply positions is 1st and What is necessary is just to comprise so that it may change by the distance of the integral multiple of the arrangement pitch in the 2nd seedling supply cup 25b, 25c (even multiple of the arrangement pitch in the seedling supply cup 25), and right and left according to the adjustment range between planting stripes What is necessary is just to set the change of the fall supply position.

  Instead of the above-described configuration, when changing the planting position, the first and second intervals between the left and right seedling planting bodies 5 are changed along the circulation path of the seedling container 25 by the planting position changing mechanism. One or each seedling planting body 5 is moved so as to change by an integral multiple of the arrangement pitch of the seedling containers 25b and 25c, and one or each seedling planting body 5 is moved by the planting position changing mechanism. It is good also as a structure which changes one or each fall supply position according to quantity. At this time, it is not necessary to change the rotation position (phase) of the seedling container 25 by the rotation timing change mechanism.

  In changing the planting position, the amount of movement of the left and right seedling planted bodies is varied, but the distance between the left and right seedling planted bodies is the arrangement pitch of the first and second seedling container bodies 25b and 25c. The distance may be changed by an integral multiple. At this time, the change amount of the rotation position (phase) of the seedling container by the rotation timing change mechanism is the position change amount of the fall supply position with the smallest position change in the circulation path of the seedling container among the plurality of drop supply positions. It is good to match.

  In the above description, the left and right seedling planting bodies 5 and the drop supply positions 39 and 40 have been described in the right-and-left straight direction. However, the left and right seedling planting bodies and the fall supply positions are aligned with the circulation path of the seedling container. For example, the left and right positions may be changed while changing the position in the front-rear oblique direction.

  In addition, although the above demonstrated the structure of 2 row planting, you may apply to the structure of 3 or more rows. At this time, the change amount of the rotation position (phase) of the seedling container by the rotation timing change mechanism is the position change amount of the fall supply position with the smallest position change in the circulation path of the seedling container among the plurality of drop supply positions. It is good to match.

  In addition, although the above demonstrated the structure planted in a row, it may apply to the structure which staggers planting, such as the structure which varied the operation timing of the right and left seedling planting body, for example. In addition, when the operation timings of the right and left seedling planting bodies are made different, the first and second seedling containers are configured to reach the same number of times at different timings at the respective drop supply positions by the circular movement by the moving mechanism.

  In addition, although the above-mentioned seedling fall supply mechanism 27 demonstrated the structure which sets the fall supply positions 39 and 40 by the support body 42, in addition to this structure, when a seedling planting body rose just below the seedling container, A configuration in which an opening actuating member provided on the seedling planting body is provided with regulating means for regulating the opening of the bottom lid of the seedling container positioned above the seedling planting body, and the regulation means is operated to release the regulation to drop and supply the seedling May be provided.

  In the above description, the vertical movement mechanism 4 and the position adjustment shaft 70 are provided on the outer side in the left-right direction of the seedling planting body 5, and the pressing wheel support frame 100 is provided on the inner side in the left-right direction of the seedling planting body 5. The vertical movement mechanism 4 and the position adjusting shaft 70 may be provided inside the body 5 in the left-right direction, and the pressure-reducing wheel support frame 100 may be provided outside the seedling planting body 5 in the left-right direction.

  In addition, staggered planting can be carried out by changing the phase in the operation of the left and right vertical movement mechanisms 4 by 180 degrees. Before and after the inter-plant adjustment device that changes the transmission ratio to the seedling planting body 5 with respect to traveling transmission and adjusts the planting plant in the front-rear direction so that one-half of the planting is the horizontal planting interval. If the phase adjustment range of the direction and the phase adjustment mechanism of the vertical movement mechanism 4 that changes and adjusts the phase of the other vertical movement mechanism 4 with respect to the phase of the one vertical movement mechanism 4 is set, the zigzag planting Easy to adjust. In addition, what is necessary is just to set it as the structure which can change and adjust the said strain adjustment apparatus and a phase adjustment mechanism in a stepless manner.

The seedling planting machine of the present invention is not limited to vegetable seedlings and may be used as a seedling planting machine for planting other seedlings.
Moreover, although the riding-type seedling planting machine has been described in detail, a walking-type seedling planting machine may be used.

It is a side view of a seedling transplanter. It is a top view of a seedling transplanter. It is the top view which showed the support body. (A: between narrow planting strips, b: between wide planting strips) It is a figure which shows a winding sprocket and its periphery. (A: plan view, b: perspective view) It is a perspective view which shows a seedling planting apparatus.

Explanation of symbols

  1: seedling planting machine, 4: vertical movement mechanism, 5: seedling planting body, 24: seedling feeding device, 57: connecting member, 70: position adjusting shaft, 73: rear pressure ring, 100: cover body support frame

Claims (1)

  A seedling supply device for providing a seedling planting body (5) configured to vertically move along a predetermined operating locus by a vertical movement mechanism (4) to plant seedlings in a field, and supplying seedlings to the respective seedling planting bodies (5) on the left and right In the seedling planting machine provided with (24) and provided with a covering body (73) covering the periphery of the seedling planted by the seedling planting body (5), the vertical movement mechanism (4) A position adjusting shaft (70) capable of changing the left-right position is extended in the left-right direction on a member (57) provided at the rotating tip of the head, and a seedling planting body (5) is attached to one end of the position adjusting shaft (70). The canopy support frame (100) is disposed in a cantilevered manner and extends from the front side to the rear side of the seedling planting body (5) on the opposite side of the position adjustment shaft (70) with respect to the seedling planting body (5). A seedling planting machine arranged at the rear end with the covering body (73) supported.

Images