JP4826327B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a seedling transplanter provided with a seedling box loading unit for loading a seedling box that accommodates a seedling that has been grown.

A seedling box loading section for loading a seedling box that contains the seedlings that have been raised, a seedling box supply transport section that transports the seedling box loaded in the seedling box loading section toward the seedling extraction position, and the seedling extraction position A first seedling taking-out means for taking out a row of seedlings from a seedling box; a seedling transferring means for receiving and transferring a row of seedlings taken out by the first seedling taking-out means; and the seedling transferring means A second seedling picking means for taking out and feeding the seedlings in the horizontal row that have been transferred to the seedling supply belt, and feeding the seedlings on the seedling supply belt one by one by driving the seedling supply belt; There is a seedling transplanting machine configured to supply seedlings to planting means and plant seedlings one by one in the field by the seedling planting means (see Patent Document 1).
Japanese Patent Laid-Open No. 2002-17118

  In the seedling transplanter, the seedling box is supplied to the seedling box loading section together with the seedling box, and the seedling box loaded and transported by the seedling box supply and transport section is transported toward the seedling extraction position, Since the seedlings are extracted from the seedling box at the seedling extraction position, if the roots that are extended to the laying floor protrude from the bottom surface of the seedling box at the time of raising seedlings, the seedling box transport and seedling extraction means in the seedling box supply transport unit There is a possibility that seedlings cannot be properly transferred to the seedling planting means due to resistance to taking out the seedlings and proper seedlings cannot be planted.

In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention according to claim 1 includes a seedling box loading section (17a) for loading a seedling box (C) for housing a seedling that has been grown, and a seedling box (C) loaded in the seedling box loading section (17a). ) To a seedling extraction position (p1), and a seedling box supply and conveyance section (17b), and a seedling extraction means (PU) for extracting seedlings from the seedling box (C) at the seedling extraction position (p1). In the seedling transplanter, a root cutting device (60) for cutting roots protruding from the bottom surface of the seedling box (C) is provided in the seedling box loading section (17a), and the seedling box loading section ( 17a) and a root cutting device (60) are arranged, and the left and right root cutting devices (60) rotate in a direction in which the upper side of the seedling box transfer in the seedling box loading section (17a) moves toward the outer side in the horizontal direction of the machine body. Left and right cutting members (6) ) Was a seedling transplantation machine is configured to be rotated in opposite directions.

Further, the invention according to claim 2 is provided with a transplanting device (9) that can be moved up and down via a link (16a, 16b) with respect to the traveling vehicle body (10), and the transplanting device (9) includes a seedling box loading unit. (17a) and a seedling box supply means (17) provided with a seedling box supply and transport section (17b), a seedling extraction means (PU), a seedling planting means (PT), and a seedling taken out by the seedling extraction means (PU) Is provided with seedling supply means (NT1) for supplying seedlings to the seedling planting means (PT) one by one, a seat (13) is provided in the left and right center of the vehicle body (10), and the root cutting device (60) The cutting member (61) is rotated about a vertical axis by a cutting motor (63), and the cutting member (61) is in contact with the left and right sides of the seedling box (C) at the position where the cutting member (61) rotates. A rod-shaped seedling box guide (64) for guiding the box (C) to a desired passing position A seedling box passage sensor (65) for detecting that the seedling box (C) is moving on the root cutting device (60) is provided on the left and right, and the root cutting device (65) is provided by the seedling box passage sensor (65). 60) When detecting that the seedling box (C) is moving, the cutting motor (63) is driven to operate the root cutting device (60), and the root cutting device (65) is used to cut the root. When it is detected that the seedling box (C) is stopped on the device (60) or that there is no seedling box (C) on the root cutting device (60), the cutting motor (63) is stopped to stop the root. The operation of the cutting device (60) is stopped, and the four seedling box loading sections (17a) are arranged on the left and right sides of the root cutting device (60) provided in the two left seedling box loading sections (17a). The cutting member (61) and the root cutting device (60 provided on the right two seedling box loading sections (17a)) The cutting member (61) is configured to rotate in directions opposite to each other, and the root cut by the cutting member (61) is configured to fly to the left and right outside of the machine body through the space below the seedling box guide portion (64). 1 was used .

According to the first aspect of the present invention, when the seedling box C is loaded in the seedling box loading section 17a, the roots protruding from the bottom surface of the seedling box C are cut by the root cutting device 60 provided in the seedling box loading section 17a. Then, the seedling box C from which the roots protruding from the bottom surface are cut is smoothly transported to the seedling extraction position p1 by the seedling box supply / conveyance unit 17b, and the seedling extraction means PU transfers the seedling from the seedling box C transferred to the seedling extraction position p1. Is taken out smoothly. The cut roots will be blown to the left and right outside of the aircraft, and it will be possible to prevent the roots from falling down and adversely affect the seedlings to be planted by the seedling planting means PT. Since it can be taken out smoothly, it is possible to appropriately supply the seedlings to the seedling planting means PT, and thus to properly plant the seedlings.
According to the invention according to claim 2, in addition to the effect of the invention according to claim 1, it is difficult for the operator who sits on the seat 13 at the center of the left and right of the machine body to take a comfortable work. When the seedling box C is stopped on the root cutting device 60 or when there is no seedling box C on the root cutting device 60, the cutting motor 63 is stopped to stop the operation of the root cutting device 60. The root protruding from the bottom of the seedling box C can be accurately cut over the entire seedling box C by the root cutting apparatus 60 without driving the root cutting apparatus 60 unnecessarily. Furthermore, the root cut by the cutting member 61 can be blown out to the left and right outwards of the machine body through the space below the seedling box guide portion 64.

A seedling transplanter according to an embodiment of the present invention will be described below.
The seedling transplanting machine 8 is a seedling transplanting machine for transplanting onion seedlings to the field, as shown in the left side view of FIG. 1, the plan view of FIG. 2, and the left side view of the latter half of the seedling transplanting machine of FIG. In addition, as a configuration in which the transplanting device 9 is mounted on the traveling vehicle body 10, the transplanting device 9 transplants seedlings in the field while traveling by the traveling vehicle body 10.

In the present specification, the left and right directions in the forward direction of the seedling transplanter 8 are referred to as left and right, respectively, the forward side is referred to as front, and the reverse side is referred to as rear.
The traveling vehicle body 10 includes a pair of left and right front wheels 11 and 11 and a pair of left and right rear wheels 12 and 12. The traveling vehicle body 10 is disposed in front of the seat 13. In order to change the traveling direction of the traveling vehicle body 10, a steering handle 14 is provided for turning the pair of left and right front wheels 11, 11 left and right. The power of the engine 2 is transmitted to the hydraulic pump 4 via the transmission belt 3, and the pressure oil from the hydraulic pump 4 is sent to drive a soil crushing device 41 described later. A pair of links 16a and 16b that are rotated up and down by an elevating cylinder 15 are provided at the rear part of the traveling vehicle body 10, and the transplanting device 9 is mounted so as to be movable up and down by the links 16a and 16b.

  Engine power is transmitted from the PTO shaft 43 to the transplantation device 9 via the transmission shaft 42 of the transplantation device 9 (FIG. 3). Further, the transplanting device 9 takes out the seedling N from the seedling box supply means 17 for accommodating and transporting the seedling box C and the cells 1 (FIG. 5) of the seedling box C supplied by the seedling box supply means 17. Means PU (FIG. 5) and seedling planting means PT (see FIGS. 1 and 3) for planting the seedlings N taken out by the seedling picking means PU one by one are provided. Therefore, if the seedling box C having the seedlings N grown in each cell 1 as described above is loaded into the seedling box supply means 17, the seedlings N in each cell 1 of the seedling box C are automatically and sequentially seeded by the seedling extraction means PU. N is taken out, and the taken out seedling N is planted one by one in the field by the seedling planting means PT.

  In the seedling box C accommodated and transported in the seedling box supply means 17, a large number of small pot-shaped cells 1 containing onion seedlings are arranged vertically and horizontally. This seedling box C is made of polypropylene or the like. It is a flexible material that is integrally molded with a synthetic resin. For this reason, when the seedling box C is transferred by the seedling box supply means 17, the seedling box C can be transferred while being bent even at the bent portion of the seedling box supply means 17. In addition, the bottom surface of the cell 1 is provided with a trifurcated bottom hole. By this bottom hole, the roots can pass through the seedling and can be extended to the bed, and the water irrigated in the cell 1 at the time of seedling raising. In addition, a seedling push-out pin 24, which will be described later, of the seedling picking means PU can pass through the seedling extraction means PU to push out the seedling and can enter the cell 1.

  When the seedling box C or the seedling container A having a flat box structure is used for raising seedlings, as shown in FIG. Since the vessel A touches the air, the roots do not easily protrude downward through the bottom hole due to the air pruning effect, and the roots can be sufficiently entangled in the cell 1 or the seedling vessel A to obtain a strong seedling. . At this time, a suction fan 69 is provided in the side wall 68 of the cultivation room 67 at substantially the same height as the shelf 66 or at a position below the shelf 66, and the breeze from the suction fan 69 is laterally and downwardly applied to the seedlings. The seedlings can be stimulated by hitting them, and the seedlings can be prevented from falling by preventing the seedlings from becoming a chief. In addition, a discharge fan 71 is provided above the shelf 66 in the ceiling portion 70 of the cultivation room 67, and the discharge fan 71 discharges the air sucked by the suction fan 71 to the outside of the cultivation room 67, and around the seedlings. The flow of wind at can be maintained well.

  In addition, as shown in FIG. 9, when a seedling box C is placed in a pool 72 for storing water and seedling is grown while irrigating the bottom surface, the seedling box C is so arranged that the roots do not protrude and extend from the bottom hole in the cell 1. An air-permeable sheet 73 having an air vent hole such as that used for a culture bag can be laid below the sheet. Since the sheet 73 does not allow water to pass but allows air to pass, the air pruning effect makes it difficult for the root to protrude downward through the bottom hole, and a strong seedling can be obtained. As shown in FIG. 10, when raising the seedling box C in the under tray U, the sheet 73 is laid between the seedling box C and the under tray U, and water is laterally applied to the under tray U. By supplying, it is possible to prevent the root from protruding downward through the bottom hole while irrigating the bottom surface.

  Further, when raising seedlings, it is preferable to reduce the nitrogen content of the bed soil and to add fertilizer after the anthocyanic pigment s develops on the stem (border portion). This increases the amount of seedling roots, prevents fallen seedlings, and facilitates the removal of seedlings from the cell 1 by the seedling transplanter 8. This method for raising seedlings is particularly effective in raising broccoli and oil rape seedlings that are easy to fall.

  Moreover, when raising the grafted seedlings such as watermelon seedlings in the seedling box C, if the bottom surface of the cell 1 is made transparent or translucent, the state of the roots in the cell 1 can be visually confirmed, Can be confirmed. In particular, in grafted seedlings, the transfer of moisture and nutrients between hogi and rootstock may not be performed smoothly due to poor bonding between hogi and rootstock, resulting in poor root development and poor growth. However, by confirming the tension of the roots in the cell 1 as described above, it is possible to easily determine and remove defective precious seedlings at the time of seedling shipment. In addition, it is good also as a structure which can make the bottom face of the cell 1 into a mesh shape (net shape) instead of making it transparent or semi-transparent, and can visually recognize the tension of the root in the cell 1. Alternatively, the bottom surface of the cell 1 may be photographed with a camera, and the photographed image may be analyzed to quantitatively determine the extent of the root in the cell 1. At this time, since the roots are close to white and the cultivation soil is brown and close to black, if the cell 1 (seedling box C) is close to black, the root portion can be easily identified.

Specifically, the transplant device 9 has the following configuration.
Specifically, the seedling box supply means 17 is arranged in the vicinity of the rear side of the seat 13 of the traveling vehicle body 10 in a side view of the vehicle body, and is a seedling box serving as a place where an operator who has boarded the traveling vehicle body 10 loads the seedling box C. The loading section 17a and the seedling box C loaded in the seedling box loading section 17a are conveyed rearwardly downward, then bent and conveyed, and further as shown in the side view of the lower half of the seedling box supply means 17 in FIG. The seedling box supply / conveyance part 17b that conveys downward toward the seedling extraction position p1 by the seedling extraction means PU, and the seedling extraction means PU that are transported by the seedling box supply / conveyance part 17b are extracted and emptied. The seedling box C is bent and conveyed in a U shape, and an empty box conveyance unit 17c for conveying the seedling box C upward toward the lower position of the seedling box loading unit 17a is provided. The seedling box loading unit 17 a is provided at the front end portion closest to the operator in the seedling box supply means 17.

  The seedling box C loaded in the seedling box loading section 17a is loaded in such a posture that the longitudinal direction of the seedling box C is directed in the front-rear direction and the upper surface side (opening portion of the cell 1) is directed upward. Therefore, the loaded seedling box C is transported in the longitudinal direction of the seedling box C, and the seedlings N accommodated in each cell 1 of the loaded seedling box C are leaves in the seedling box loading section 17a. The stem Nb extends upward, and at the seedling extraction position p1, the leaf stem Nb extends rearward and is transported so that the floor Na is positioned forward relative to the leaf Nb. The

  In addition, the seedling box supply means 17 is provided with an empty box accommodating portion 17d (FIG. 1) that receives and accommodates an empty seedling box C that is conveyed by the empty box conveying portion 17c and discharged from its conveying end. It is supposed to be.

  The seedling box supply means 17 is supported by a support frame 18, and the base of the support frame 18 is supported by a planting part transmission case 19, and a connecting member 21 is coupled to the planting part transmission case 19. The connecting member 21 moves up and down the end portion on the seedling planting device 9 side of a three-point link mechanism comprising a single upper link 16a and a pair of lower links 16b that support the seedling planting device 9 so as to be movable up and down on the traveling vehicle body 10. It connects with the up-and-down member 22 connected to a direction.

  As shown in FIG. 5, the seedling extraction means PU is configured to extrude and extract seedlings from the bottom side of the cell 1. Specifically, the pin 24 for extruding the seedling provided in a rod shape is arranged in the U-shaped conveying portion on the lower side of the seedling box supply means 17 so that the tip portion of the pin 24 faces rearward, The tip of the pin 24 is provided so as to reciprocate at an appropriate timing so that it protrudes backward and retracts forward. As a result, the seedling pushing pin 24 enters the bottom hole provided in the bottom of the cell 1 of the seedling box C supplied up to the seedling picking position p1 and pushes the floor Na in the cell 1 backward. Thus, the seedling N is taken out from the cell 1 backward.

  In addition, the seedling extraction means PU is configured to simultaneously extract a plurality of seedlings N from the cell 1 in a row. That is, the seedling extruding pins 24 are arranged side by side corresponding to each of the cells 1... Of the seedling box C supplied to the seedling picking position p1 in the left and right horizontal rows (short direction of the seedling box C). A plurality of seedlings are provided so that the seedlings in a horizontal row at the seedling extraction position p1 are simultaneously pushed out. 5, a plurality of seedlings N... Taken out by the seedling picking means PU are sequentially seeded by the seedling planting disk 27 by the seedling feeding means NT1 having the seedling feeding belt 36 and the seedling lowering feed belt 37. It is set as the structure supplied to the seedling planting means PT which has. The seedling planting disk 27 is rotated by a planting disk drive sprocket 26 driven by a transmission shaft 42 to which a driving force from the PTO shaft 43 is transmitted.

The seedling planting means PT is configured such that the seedling N is sandwiched between the left and right planting discs 27 (specifically, the leaves of the seedling N are sandwiched) and moved and planted in the soil of the transplanting field in the field. .
The specific drive configuration of the seedling planting means PT is as follows.

  First, the planting part is connected to the connecting member 21 of the transplanting device 9 through the transmission shaft 42 provided with the universal joint 44 from the PTO shaft 43 in which the power from the engine 2 protrudes to the rear part of the traveling vehicle body 10. Input into the transmission case 19, and transmitted to the transmission shaft 33 that is long in the left-right direction of the machine body in the transmission case 19 disposed near the lower part of the lower part of the seedling box supply means 17 through the transmission mechanism in the transmission case 19, A plurality of seedling supply means NT1 provided so as to extend rearward from the transmission case 19 is rotated.

  A seedling is delivered from the plurality of seedling supply means NT1 to the seedling planting means PT, and is provided with a planting disk 27 that is rotated by a planting disk drive sprocket 26 that is driven by the drive mechanism in the planting transmission case 19 A description of a specific drive configuration for seedling planting by the seedling planting means PT or the like is omitted.

  As shown in the rear view of the essential part of the seedling box supply means 17 in FIG. 6, the seedling supply means NT1 specifically includes a pair of drive rollers 34, 34 provided so as to be driven and rotated on the left and right ends, and left and right A pair of driven rollers 35, 35 provided rotatably at the center side and a pair of seedling supply belts 36, 36 wound around both rollers 34, 34, 35, 35 are provided. Thereby, a plurality of seedlings N ... taken out by the seedling taking-out means PU and arranged in a line in the left and right lateral rows are placed on the left and right supply belts 36, 36, Then, the left half of the horizontal row of seedlings N... Is conveyed to the left by the drive rotation of the left supply belt 36, and the right half is conveyed to the right by the drive rotation of the right supply belt 36 to drive the left and right. On the upper end side of the pair of left and right seedling lowering feed belts 37 provided on the left and right outer sides of the rollers 34, 34 (seedling supply parts 26c, 26c, but only the left seedling supply part 26c is shown in FIG. 6). Then, the floor portion Na of the seedling N is supplied one by one.

  The right and left seedling planting means PT and PT planting disks 27 and 27 provided with the seedlings N supplied one by one in correspondence with the left and right seedling supply units 26c and 26c have been supplied. The seedlings are planted by moving the seedlings N and N into the soil of the transplanting field.

  In addition, protrusions 36a are provided at set intervals in the belt rotation direction on the front end side of the outer peripheral surface of the seedling supply belt 36, and one floor portion Na of the seedling N is provided on the belt upper surface between the right and left of the protrusion 36a. Thus, the seedlings placed on the upper surface of the seedling supply belt 36 can be accurately supplied to the seedling supply unit 26c one by one.

  Incidentally, there is a configuration in which the seedling N extracted by the seedling extraction means PU is provided directly on the seedling supply belts 36, 36 of the seedling supply means NT1, but in this embodiment, the seedling supply means NT1 is the seedling box supply means 17. The seedling supply means NT1 (FIG. 5) for transferring the seedling N extracted by the seedling extraction means PU is provided to the seedling supply means NT1 arranged so as to enter the seedling supply means NT1. However, it does not protrude rearward of the seedling box supply means 17 and the length of the transplanting device 9 is shortened.

  The seedling transfer means NT2 includes seedling engaging portions 56a in which the respective floor portions Na of the row of seedlings N ... pushed out by the seedling pushing pins 24 ... of the seedling taking-out means PU are engaged. The seedling holder 56 is provided, and the seedling removal position p1 and the seedling delivery position p4 in the vicinity of the upper front side of the seedling supply belts 36 and 36 are linked by a link 38 that drives and rotates the seedling holder 56 (FIG. 5). 6) are reciprocated as indicated by an arrow Y. Thus, when the seedling pushing pins 24... Are pushed out from the respective cells 1... By the seedling pushing operation, the seedling holders 56 in the seedling holder 56 located at the seedling picking position p1. The floor portion Na of the seedling N is engaged with and held by the joint portions 56a.

  Then, the seedling holder 56 rotates downward by the rotation of the link 38 and moves to the seedling delivery position p4. At this time, the tips of the second seedling push-out pins 39... Fixed in such a manner that the axis is oriented horizontally rearward in each seedling engaging portion 56 a enter into each seedling engaging portion 56 a. The combined floor portion Na of the seedling N is pushed rearward and dropped onto the seedling supply belts 36 and 36 supported by the belt support portion 58 integral with the planting portion transmission case 19. In addition, when the floor part Na ... of the seedling N engaged in each seedling engaging part 56a ... by the second seedling pushing pin 39 ... was pushed backward, it was provided in a comb shape. The seedling depressing member 40 (FIG. 6) is lowered to depress the floor portion Na of each seedling N from which the member 40 has been extruded, and the seedlings are quickly and accurately placed on the seedling supply belts 36, 36. It is provided to be. The seedling push-down member 40 is supported by the planting part transmission case 19.

  As shown in the side view of the main part of the seedling transplanting machine 8 in FIG. 3, a front pressure reducing wheel 28 for leveling the surface soil surface of the transplanting field in front of each seedling planting position by each seedling planting means PT is suspended on the fixing member 20. Yes. Further, a rolling wheel 30 is provided that is suspended from the fixing member 20 and is guided by the footsteps of the rear wheel 12 to support the transplanting device 9. Further, the transplanting device 9 includes, in one seedling box supply means 17, a seedling extraction means PU for extracting seedlings N ... one by one from the seedling box C loaded in the seedling box supply means 17, and the seedling extraction means. Seedling transfer means NT2 for transferring the seedlings N ... taken out by the PU to the seedling supply means NT1, and seedling planting means for providing the horizontal seedlings N ... transferred by the seedling transfer means NT2 on the left and right From one seedling box C comprising seedling supply means NT1 for supplying PT, PT, and left and right seedling planting means PT, PT for planting the seedling N supplied by the seedling supply means NT1 in the transplanting field Two-row planting is configured. By providing two transplantation units configured in this way on the left and right, it can be configured as four-row planting, and by providing n bodies, it can be configured as 2 × n-row planting. It has become.

  The fixing member 20 is provided with a soil loosening body 29 on the rear side of the front pressure reducing wheel 28. The soil loosening bodies 29 are supported by the planting part frame 25 (FIG. 4), and the soil loosening bodies 29 are arranged in a row corresponding to the planting disks 27 at positions corresponding to the respective planting disks 27. Yes. A seedling is planted by the planting disk 27 in the soil of the field loosened by the soil loosening body 29. The soil around each seedling N planted by the planting disk 27 is covered with a cover ring 31. The planting disk 27 and the covering ring 31 are supported by a covering ring / planting disk support frame 32 attached to the planting part frame 25 (FIG. 4) so as to be rotatable up and down. A plate 23 that guides the covering ring / planting disk support frame 32 up and down is attached to the fixing member 20.

  The traveling vehicle body 10 of the seedling transplanter 8 of the present embodiment is provided with a soil crushing device 41 for crushing a groove in a dent formed by a rear wheel 12 that can be formed in a farm field. The ground breaking device 41 is a device for erasing tire marks by loosening the groove with a rotating body 45 rotating around a vertical axis so that the groove is substantially equal to the field. The rotating body 45 is driven by a hydraulic motor 46 that is driven by hydraulic oil supplied from the hydraulic pump 4 via the hose 4a. The rotating body 45 may be driven by a mechanical means for transmitting the power of the engine 2 instead of the power from the hydraulic pump 4, or the rotating body 45 may be driven by an independent single driving source.

  In the eight-row onion seedling transplanting machine 8 of this embodiment, seedlings are also planted in the vicinity of the running trace of the rear wheel 12, so that the running trace of the tire is cultivated by the rotating body 45 of the ground breaking device 41. Since the grooves are erased and crushed, the field scene is leveled and the accuracy of the planting posture, planting depth, etc. of the seedlings can be maintained well.

  Conventionally, the groove portion of the tire mark has been cultivated with a traction device such as a cultivating nail, but the groove may not disappear if the soil mass is rough. However, the soil crushing device 41 of this embodiment rotates around the vertical axis. Since it is the body 45, the field scene can be cultivated by the rotating body that rotates around the vertical axis that rotates or swings in the horizontal direction, and the grooves are erased and crushed.

  Further, as shown in the plan view of the soil crushing device portion in FIG. 7A, a pair of soil culturing plates 47, 47 for bringing soil to the field portions cultivated on both sides of the rotating body 45 are provided. As shown in the sectional view of the field of the groove portion of FIG. 7 (b), the pair of soil-growing plates 47 and 47 can bring the soil to the groove portion cultivated by the rotating body 45, so that the ground surface sinks. Is prevented.

If the soil is not brought close to the groove portion by the cultivating plate 47, even if the groove portion is leveled, the portion is lower than the ground and is soft, so the soil may be washed away by rain or the like, and the crop may be washed away.
Note that the earthen plate 47 of the present embodiment is attached to the connecting member 21 so that the angle of the plane facing the vertical direction can be changed and adjusted.

  Further, as shown in the plan view of the main part of the eight-stripe transplanter 8 of this embodiment in FIG. 4A and the schematic rear view of FIG. 4B, a pair of rear wheels 12 is provided at the middle part of the left and right rear wheels. , 12 is provided with a center wheel 49 in the rear wheel rolling frame 48 at a position substantially coincident with the central axis.

  Conventionally, when seedlings are transplanted with eight straddles, the entire surface becomes a flat surface, and when carrying out management work etc. with a work machine that performs work at half the width of the number of planting strips (width of 4 strips), the traveling vehicle body tilts Therefore, the seedlings could not be planted well. However, if the center wheel 49 is provided at a position substantially coincident with the central axis of the rear wheel 12, the above-mentioned conventional drawbacks are eliminated.

  The center wheel 49 is supported at the tip of the arm 54 by a bracket 51 provided on the rear wheel transmission case 50 of the rear axle so that the vertical position can be adjusted in conjunction with the raising and lowering of the transplanting device 9. The ground can be pressed by the weight. Further, when the center of swing of the center wheel 49 is substantially coincident with the center axis of the rear wheel 12, the grooving operation by the center wheel 49 is stabilized. When the course is changed in this way, the center wheel 49 moves in substantially the same manner as the rear wheel 12, so that there is no trouble such as dragging.

  As described above, the center ring 49 is configured to rotate up and down in conjunction with the raising and lowering of the transplanting device 9. However, the fulcrum is provided on the lower link 16 b that raises and lowers the transplanting device 9, and the spring that moves the center ring 49 up and down. The center ring 49 is connected to the lower end of the rod 53 with 52, and the upper end of the rod 53 is attached to the lower ring 16b (FIG. 3).

According to the above configuration, when the transplantation device 9 is raised, the center ring 49 rises in conjunction with the transplantation device 9, so that the transplantation device 9 can be easily maintained.
In addition, the size approximately equal to or slightly larger than the outer dimension of the empty seedling box C via hooks 55a on the mounting frames 55 on both sides of the traveling vehicle body 10 at a substantially intermediate portion between the traveling vehicle body 10 and the transplanting device 9. The empty seedling box storage stand 57 is provided so as to be detachable from the traveling vehicle body 10 and thus the machine body 12. Therefore, the seedling box C that has been transplanted and emptied can be placed in the empty seedling box storage stand 57 by simply dropping the seedling box C into the storage stand 57, so that the seedlings placed separately one by one can be stacked. This saves you the trouble of carrying it to the frame and allows you to concentrate on the transplanting work.

  By the way, a root cutting device 60 for cutting a root protruding from the bottom of the seedling box C is provided on the bottom plate portion on which the seedling box C of the seedling box loading section 17a for each two items is placed. This root cutting device 60 is provided with two cutting members 61 made of a linear resin material (for example, made of nylon) attached to the outer peripheral portion of a rotating plate 62, and the rotating plate 62 is vertically moved by a cutting motor 63. By rotating around the center, the cutting member 61 is rotated to cut the root. The rotating plate 62 is also made of a resin material (for example, made of nylon), and the cutting member 61 and the rotating plate 62 are made of an elastic body. Therefore, even if the rotating plate 62 interferes with the bottom of the seedling box C, the seedling box C is not damaged. Moreover, since the thickness of the cutting member 61 is about 1.5 mm in diameter, the moment of inertia is small even if it rotates, and it prevents the cutting member 61 from being injured even if it touches the operator's hand or finger. is doing. At the position where the cutting member 61 rotates, rod-shaped seedling box guide portions 64 are provided on the left and right sides that contact the left and right sides of the seedling box C and guide the seedling box C to a desired passing position. A photoelectric seedling box passage sensor 65 that detects that the seedling box C is moving on the root cutting device 60 is provided at a position where the cutting member 61 rotates. Accordingly, when the seedling box C is moving on the root cutting device 60 by the seedling box passage sensor 65, the cutting motor 63 is driven to operate the root cutting device 60 (cutting member 61), and the root cutting device. When seedling box C is stopped on 60 or when there is no seedling box C on root cutting device 60, the cutting motor 63 is stopped to stop the operation of root cutting device 60 (cutting member 61). It has become. Thereby, the root protruding from the bottom of the seedling box C can be accurately cut over the entire seedling box C by the root cutting apparatus 60 without driving the root cutting apparatus 60 unnecessarily. In addition, the whole root cutting device 60 including the seedling box guide part 64 and the seedling box passage sensor 65 is configured to be detachable with a mounting bolt with respect to the seedling box loading part 17a, and the seedling has no or few roots protruding from the bottom. When the box C is loaded into the seedling box loading unit 17a, it can be detached from the seedling box loading unit 17a. In addition, when the root cutting device 60 is removed, a seedling box guide that replaces the seedling box guide part 64 can be mounted on the left and right of the seedling box loading part 17a.

  In this seedling transplanting machine 8, four seedling box loading sections 17a are arranged on the left and right in an eight-row planting configuration, but the cutting member 61 of the root cutting device 60 provided in the two left seedling box loading sections 17a. Is rotated left when viewed from above, and the cutting member 61 of the root cutting device 60 provided in the right two seedling box loading portions 17a is configured to rotate right when viewed from above. The left and right root cutting devices 60 rotate backward. That is, since the cutting member 61 of the root cutting device 60 rotates toward the laterally outer side of the machine body on the upper side of the seedling box transfer part 17a of the seedling box loading section 17a, the cut roots, the soil collapsed from the seedling box C, etc. The root and soil are not easily applied to the operator sitting on the seat 13 at the center of the left and right of the aircraft, and the root and soil fall downward and the seedling planting means falls. An adverse effect on PTs and seedlings to be planted with PT is suppressed, and planting can be optimized. In addition, the roots and soil that are blown by the cutting member 61 are blown to the left and right outwards of the aircraft through the space below the seedling box guide portion 64.

  As described above, the seedling transplanting machine 8 directs the seedling box loading unit 17a for loading the seedling box C for storing the seedlings that have been raised and the seedling box C loaded in the seedling box loading unit 17a toward the seedling extraction position p1. A root cutting device 60 that cuts a root protruding from the bottom surface of the seedling box C, and includes a seedling box supply and transport unit 17b that transports the seedling and a seedling extraction means PU that extracts seedlings from the seedling box C at the seedling extraction position p1. It is provided in the seedling box loading unit 17a.

  Accordingly, when the seedling transplanter 8 loads the seedling box C in the seedling box loading section 17a, the seedling transplanter 8 cuts the root protruding from the bottom surface of the seedling box C by the root cutting device 60 provided in the seedling box loading section 17a. Then, the seedling box C from which the roots protruding from the bottom surface are cut is smoothly transported to the seedling extraction position p1 by the seedling box supply / conveyance unit 17b, and the seedling extraction means PU transfers the seedling from the seedling box C transferred to the seedling extraction position p1. Is taken out smoothly. Therefore, since the seedling can be smoothly taken out from the seedling box C, the seedling transfer means NT2 and the seedling supply means NT1 can appropriately supply the seedlings to the seedling planting means PT and PT, and thus properly plant the seedlings. Can be attached.

  In addition, since the operator who rides on the traveling vehicle body 10 is provided with the root cutting device 60 in the seedling box loading portion 17a for supplying the seedling box C, the worker visually recognizes the state of root cutting by the root cutting device 60. Can do.

Side view of seedling transplanter Top view of seedling transplanter Side view of main part of partially transplanted seedling transplanter A plan view of the essential parts of the seedling transplanter (FIG. 4A) and a rear view of the essential parts (FIG. 4B) Side view of main part of seedling supply means of seedling transplanter Rear view of main parts of seedling supply means of seedling transplanter A schematic plan view (FIG. 7 (a)) of a soil crushing device portion of a seedling transplanter and a view showing a state of leveling a farm scene using the soil crushing device. Diagram showing cultivation room The figure which shows the state of raising seedlings using a pool The figure which shows the state of raising seedlings using an under tray

  8: Seedling transplanter, 17a: Seed box loading unit, 17b: Seed box feeding and conveying unit, 60: Root cutting device, C: Seed box, PU: Seed taking means, p1: Seed picking position

Claims (2)

A seedling box loading section (17a) for loading a seedling box (C) for storing the seedlings that have been raised, and a seedling box (C) loaded in the seedling box loading section (17a) toward the seedling removal position (p1) In a seedling transplanting machine comprising a seedling box supply / conveying section (17b) for transporting and a seedling extracting means (PU) for extracting seedlings from the seedling box (C) at the seedling extraction position (p1), the seedling box (C) A root cutting device (60) for cutting roots protruding from the bottom of the seedling box is provided in the seedling box loading portion (17a), and the seedling box loading portion (17a) and the root cutting device (60) are provided to the left and right with respect to the left and right center of the machine body. Each left and right root cutting device (60) cuts the root by a cutting member (61) that rotates in a direction in which the seedling box transfer upper side in the seedling box loading section (17a) moves toward the outside in the left-right direction of the machine body. The left and right cutting members (61) rotate in opposite directions to each other Seedlings transplanter. A transplanting device (9) is provided to the traveling vehicle body (10) so as to be movable up and down via links (16a, 16b). The transplanting device (9) includes a seedling box loading unit (17a) and a seedling box supply / conveying unit ( 17b) a seedling box supply means (17), a seedling removal means (PU), a seedling planting means (PT), and a seedling planting means (PT) each seedling taken out by the seedling extraction means (PU) A seedling supply means (NT1) for supplying to the vehicle is provided, a seat (13) is provided at the left and right center of the vehicle body (10), and the root cutting device (60) is for cutting the linear cutting member (61). The motor (63) is configured to rotate around the vertical axis, and the cutting member (61) is rotated at the position where the seedling box (C) is brought into contact with the left and right sides of the seedling box (C). A bar-shaped seedling box guide part (64) for guiding is provided on the left and right, and the root is cut. A seedling box passage sensor (65) for detecting that the seedling box (C) is moving on the stand (60) is provided, and the seedling box (60) is provided on the root cutting device (60) by the seedling box passage sensor (65). When it is detected that C) is moving, the cutting motor (63) is driven to operate the root cutting device (60), and the seedling box passage sensor (65) is used to turn the seedling on the root cutting device (60). When detecting that the box (C) is stopped or that there is no seedling box (C) on the root cutting device (60), the cutting motor (63) is stopped and the root cutting device (60) is operated. The cutting member (61) of the root cutting device (60) provided on the left two seedling box loading sections (17a), with four seedling box loading sections (17a) arranged on the left and right, The cutting members (61) of the root cutting device (60) provided in the two right seedling box loading sections (17a) are mutually connected. It is configured to be rotated in a direction, seedling transplantation machine of claim 1 where the structure fly through space below the seedling box guide section (64) towards the left and right outside of the fuselage roots were cut by the cutting member (61).

Images