Seedling planting apparatus

Abstract

To plant pot seedlings in a farm field at high speed without damaging the pot seedlings irrespective of presence or absence of a multifilm.SOLUTION: A seedling planting apparatus 5 converts pot seedlings 10 conveyed in a horizontal posture to an upright posture by a seedling planting claw 23, and plants them in a farm field G. The trajectory of the seedling planting claw 23 draws an arc in the same direction as a rotation direction of a travelling wheel of a seedling transplanter 1 to be pressed against the top face of a root part 10b of the pot seedling 10 from the front side when descending from up to down, descends in this state, converts the pot seedlings 10 into an upright state with the root part 10b of the pot seedling 10 facing downward, and moves so as to plant the seedlings in the farm field G in the lowest position. The seedling planting claw 23 includes a protrusion 23a protruding toward a pot seedling 10 side at its tip. In the lowest position, the trajectory of the seedling planting claw 23 is set to go out above the farm field G after being tilted so that the tip side of the seedling planting claw 23 is on a front side relatively with respect to the base end side.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a seedling planting device to be installed on a seedling transplanter, and more specifically, to a device for automatically planting potted seedlings that are pushed out of seedling boxes and transported sequentially into an upright position in a field. [Background technology]

[0002] Seedling transplanters for transplanting seedlings of vegetables such as onions and cabbages, and flowering plants into fields, have been provided in the past, and the present applicant has also provided, in Japanese Patent Application Laid-Open No. 2003-79210 (Patent Document 1) and other publications, a seedling transplanter in which seedling boxes containing potted seedlings are simply set on a seedling carrier, and the seedling boxes are sequentially transported from the seedling carrier as the seedling transplanter travels, the potted seedlings are pushed out of the seedling boxes, and the pushed-out potted seedlings are converted into an upright position by a planting device and automatically planted in the field.

[0003] In detail, as shown in Figures 14(a) and (b), the seedling transplanter lowers a seedling carrier 101, pushing out potted seedlings 103 in seedling boxes 102 that are being transported therefrom using a push rod 104, and then moves the pushed-out potted seedlings 103 downward to a horizontal conveyor belt 106 using a crank rod 105. At this time, the potted seedlings 103 are arranged tilted so that the leaf portion 103a is at the rear in the direction of travel of the seedling transplanter and the root portion 103b is at the front. In this state, the potted seedlings 103 transported by the horizontal feed conveyor belt 106 are transported downward one by one by the vertical feed belt 107, as shown in Figure 14(b). The transported potted seedlings 103 are successively held between a pair of planting discs 108, and the potted seedlings 103, which are oriented horizontally, are converted into an upright position, and the potted seedlings 103 are planted in the field G.

[0004] Furthermore, when potted seedlings 103 placed on a horizontal conveyor belt 106 are planted in a field G by seedling-planting tines 109 supported on tine drive shafts parallel to the case drive shaft on the outer periphery of a rotary case that is rotated in the same direction as the axles of the traveling wheels of the seedling transplanter by a case drive shaft parallel to the case drive shaft, the procedure is as follows: As shown in Figure 15, the seedling-planting tines 109 are positioned so that their tips face outward in the radial direction of the drive shaft relative to the rotary case, and the rotary case is rotated in this state, causing the tips of the seedling-planting tines 109 to rotate in an arc in the same direction as the rotation of the traveling wheels (clockwise in Figure 15). During this rotational path, the seedling-planting tines 109 are pressed against the upper surface of the rear roots 103b of the potted seedlings 103 in the direction of their travel. By doing so, the potted seedling 103 can be lowered together with the seedling planting claw 109 while tracing the arc, thereby converting the potted seedling 103 into an upright position with the root portion 103b downward, and planting it in the field G. After planting, the seedling planting claw 109 is rotated around the claw drive shaft relative to the rotary case in the opposite direction to the rotation direction of the traveling wheels, so that the seedling planting claw 109 leaves the field G almost vertically while maintaining a nearly upright posture relative to the field G. This causes the seedling planting claw 109 to move away from the potted seedlings 103 planted in the field G, and the seedling planting claw 109 does not interfere with the potted seedlings 103. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-79210 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when planting in a field covered with mulch film, holes in the mulch film may become larger or torn pieces of the mulch film may get under the roots 103b of the potted seedlings 103, making the plant unsuitable for subsequent growth.

[0007] Therefore, it is necessary to use a method in which a cup or the like is used to form a planting hole on the surface of the field and then plant the potted seedling 103 in that planting hole. However, this method has the problem that it is difficult to increase the speed because it is affected by the speed at which the upright potted seedling 103 is allowed to free fall a distance at least equal to the height of the potted seedling 103 when it is dropped into the cup. [Means for solving the problem]

[0008] In order to solve the above problems, the seedling planting device of the present invention comprises: The potted seedlings are transported in a horizontal position with their leaves facing backward in the direction of travel of the seedling transplanter and their roots facing forward, and are converted into an upright position by seedling planting claws supported by claw drive shafts parallel to the case drive shaft against the outer periphery of a rotary case which is rotated in the same direction as the rotation direction of the running wheels of the seedling transplanter by a case drive shaft parallel to the axle of the running wheels of the seedling transplanter, and then planted in a field. In a seedling planting device, the trajectory of the seedling planting claws, when descending from above to below, describes an arc in the same direction as the rotation direction of the traveling wheels of the seedling transplanter, with the tip of the seedling planting claw facing outward in the radial direction of the case drive shaft of the rotary case, and is pressed against the upper surface of the root portion of the potted seedling from the front side, and continues to describe the arc as the rotary case rotates, thereby descending, converting the potted seedling into an upright position with the root portion of the potted seedling facing downward, and moving to plant it in the field at the lower end position, The seedling planting claw has a protrusion at its tip end that protrudes toward the potted seedling so that the roots of the potted seedling come into contact with the field before the roots come into contact with the field when the potted seedling is planted, The trajectory of the seedling planting claw is set so that at the lower end position, the tip side of the seedling planting claw is tilted around the claw drive shaft relatively forward relative to the base end side by at least the protruding length of the protrusion, and the seedling planting claw moves upward out of the field while roughly maintaining this tilted state.

[0009] With this configuration, in the past, when a mulch film was laid out on the surface of a field, it was necessary to use a cup-type seedling planting device equipped with a cup that forms a planting hole on the surface of the field.However, when planting potted seedlings, the protrusion comes into contact with the planting position in the field before the roots do, so when a mulch film is laid out on the surface, the mulch film at the planting position can be torn in advance by the protrusion, thereby preventing the potted seedlings from being damaged by the mulch film. The trajectory of the seedling planting claw is set so that at the lower end position, the tip side of the seedling planting claw is tilted around the claw drive shaft so that it is relatively forward relative to the base end side by at least the protruding length of the protrusion, and the seedling planting claw moves upward out of the field while roughly maintaining this tilted state, so that the claw can be raised toward the top of the field along a trajectory that prevents the protrusion from hitting the roots of the potted seedlings planted in the field. Furthermore, with the conventional cup-type seedling planting device, it was difficult to increase the speed because the potted seedlings had to be dropped vertically into the cup in an upright position, but the present invention reduces this free-fall portion, making it possible to plant potted seedlings in the field at high speed regardless of whether a mulch film is laid on the surface.

[0010] The seedling planting device includes: In one embodiment, the seedling planting claw has a portion that is pressed against the root portion of the potted seedling from the front side during planting, and is formed wide enough to support the root portion at at least two points in the circumferential direction.

[0011] With this configuration, the potted seedlings can be prevented from falling to either side of the moving direction of the seedling transplanter during planting.

[0012] The seedling planting device is provided with a crushing means for crushing both sides of the potted seedlings planted in the field in the direction of travel of the seedling transplanter, An example embodiment is shown in which the compacting means is configured to compact the field centered on the position where the seedling planting claws plant the potted seedlings in the field or just ahead of that position in the direction of travel of the seedling transplanter.

[0013] The suppression means is not particularly limited, but examples include rollers, sleds, pipes extending in the direction of travel of the seedling transplanter, etc., in order to prevent the mulch film from being torn when it is stretched over the surface of the field.

[0014] With this configuration, the seedling planting claws can compress the potted seedlings centered on the position where they will be planted in the field or just in front of it, thereby quickly stabilizing the planting state of the potted seedlings. If the seedling planting claws were configured to compress the potted seedlings centered behind the position where they will be planted in the field, the compression would occur when the seedling planting claws were removed from the field, causing the compressed soil to move the potted seedlings forward immediately after planting, causing them to approach the seedling planting claws. However, with this configuration, this problem can be avoided.

[0015] The seedling planting device includes: In this embodiment, a mulch pressing means for pressing down a mulch film stretched over the surface of the field is provided in front of the rotary case.

[0016] The mulch holding means is not particularly limited, but examples include a roller, a sled, a pipe extending in the direction of travel of the seedling transplanter, or the like, in order to prevent the mulch film from being torn when it is stretched over the surface of the field.

[0017] This configuration prevents the mulch film from floating above the field surface during planting, and prevents the mulch film from being torn by components of the seedling transplanter other than the seedling planting claws.

[0018] The seedling planting device includes: A soil remover is provided to remove soil adhering to the tip of the seedling planting claw.

[0019] The position where the soil remover removes the soil adhering to the seedling planting claws is not particularly limited, but it is preferable that the tip of the seedling planting claws be positioned so as to protrude rearward relative to the rotary case, thereby making it less likely that the soil removed from the seedling planting claws by the soil remover will hit the seedlings or machinery (such as the crushing means) being transplanted.

[0020] This configuration prevents soil from accumulating on the tip of the seedling planting claw where the protrusion is provided. [Effects of the Invention]

[0021] According to the seedling planting device of the present invention, when a mulch film is laid on the surface of the field, the mulch film at the planting position can be torn off in advance to prevent damage to the potted seedlings by the mulch film. Moreover, the potted seedlings can be planted in the field at high speed regardless of whether a mulch film is laid on the surface. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a left side view schematically showing a seedling planting device according to a first embodiment of the present invention. FIG. [Figure 2] FIG. 10 is a rear view of the left side of the seedling transplanting device. [Figure 3] 1A and 1B are diagrams showing the pressing means of the seedling planting device, in which (a) is a left side view and (b) is a plan view. [Figure 4] 10A and 10B are diagrams showing a modified example of the suppression means, in which (a) is a plan view and (b) is a rear view. [Figure 5] FIG. 4 is a left side view showing the mulch pressing means of the seedling planting device. [Figure 6] This is a left side view of the seedling planting device with the front cover omitted so that the internal structure of the rotary case of the seedling planting mechanism can be seen. [Figure 7] 1A is a left side view, FIG. 1B is a front view, and FIG. 1C is a bottom view showing the seedling planting claw of the seedling planting device. [Figure 8] 10A and 10B are diagrams showing a modified example of the seedling planting claw, in which (a) is a left side view and (b) is a cross-sectional view taken along line BB in (a). [Figure 9] FIG. 10 is a left side view showing the movement trajectory of the rear end of the seedling planting claw driven by the seedling planting mechanism. [Figure 10] FIG. 10 is a left side view showing a method of planting potted seedlings using the seedling planting claws of the seedling planting mechanism. [Figure 11] FIG. 10 is a left side view schematically showing the main parts of a seedling planting device according to a second embodiment of the present invention. [Figure 12] FIG. 10 is a rear view of the left side portion of the main part of the seedling transplanting device. [Figure 13] FIG. [Figure 14] 1A and 1B are diagrams showing a seedling transplanter according to the background art, in which (a) is a side view and (b) is a perspective view. [Figure 15] FIG. 1 is a side view showing a method for planting potted seedlings using the seedling planting claws of a seedling transplanter according to the related art. DETAILED DESCRIPTION OF THE INVENTION

[0023] A first embodiment of the present invention will be described with reference to Figures 1 to 10. In each figure, an arrow F indicates the front side of the aircraft body (the direction of travel). As shown in Figures 1 and 2, the seedling transplanter 1 of this embodiment is a ride-on type equipped with running wheels (not shown) at the front and rear of the body, and with a driver's seat mounted on a frame supported by the running wheels.It is a rear-mounted type equipped with a seedling carrier 4 for transporting seedling boxes (not shown) and a seedling planting device 5 of the present invention, etc., mounted behind the driver's seat.

[0024] The seedling planting device 5 is equipped with a seedling removal mechanism (not shown) that removes potted seedlings 10 from seedling boxes mounted on the seedling carrier 4, a transport mechanism 12 that transports the potted seedlings 10 removed by the seedling removal mechanism in a horizontal position with the leaves 10a facing backward in the direction of travel of the seedling transplanter and the roots 10b facing forward, a seedling planting mechanism 13 that converts the horizontally positioned potted seedlings 10 supplied from the transport mechanism 12 into an upright position using seedling planting claws 23 attached to a rotary case 21 and plants them in the field, a mulch pressing means 14 in front of the rotary case 21 that presses down on the mulch film stretched over the surface of the field G, and a pressing means 15 that presses down on both sides of the potted seedlings 10 in the direction of travel of the seedling transplanter 1.

[0025] As shown in Figures 3, 4, and 6, the seedling planting mechanism 13 includes a rotary case 21 attached to the tip of a case drive shaft 20, which is rotatably mounted relative to the main body of the seedling planting device 5 and parallel to the axle of the traveling wheels, and which rotates together with the case drive shaft 20. On the outer periphery of the outer surface of the rotary case 21, pawl drive shafts 22 are rotatably mounted at equal intervals in the circumferential direction and extend parallel to the case drive shaft 20. The base end of a seedling planting pawl 23 is fixed to the outer side of each pawl drive shaft 22, and a seedling planting pawl drive piece 24 is fixed to the inner side. A cam shaft 25 extending parallel to the case drive shaft 20 is mounted on the seedling planting pawl drive piece 24 at a distance from the pawl drive shaft 22, and a cam roller 26 is rotatably mounted on the tip of the cam shaft 25. A disk-shaped fixed plate 27 is provided inside the rotary case 21 so as not to rotate relative to the main body of the seedling planting mechanism 13, and a cam groove 28 into which a cam roller 26 fits is formed on the outer surface of the fixed plate 27. The cam mechanism having this cam groove 28 and cam roller 26 is configured so that the seedling planting claws 23 are driven along a trajectory described below as the rotary case 21 rotates.

[0026] As shown in Figure 7, the seedling planting claw 23 has a protrusion 23a at its tip that protrudes toward the pot seedling 10 so that the roots of the pot seedling 10 come into contact with the field before they come into contact with the field when the pot seedling 10 is planted. 8, the seedling planting claws 23 may be configured such that the portions 23b that are pressed from the front against the root portions 10b of the potted seedlings 10 during planting are formed wide enough to support the root portions 10b at at least two points in the circumferential direction. This configuration can prevent the potted seedlings 10 from tipping over to either side in the direction of travel of the seedling transplanter 1 during planting.

[0027] As shown in Figures 9 and 10, when the seedling planting claw 23 descends from above, the tip of the seedling planting claw 23 points radially outward from the case drive shaft 20 of the rotary case 21, and describes an arc in the same direction as the rotation of the running wheel of the seedling transplanter 1, and is pressed against the upper surface of the root portion 10b of the potted seedling 10 from the front side.In this state, the seedling planting claw 23 continues to describe the arc as the rotary case 21 rotates, and the potted seedling 10 is converted into an upright position with the root portion 10b of the potted seedling 10 downward, and planted in the field G at the lower end position.After that, at the lower end position, the seedling planting claw 23 tilts around the claw drive shaft 22 so that the tip side is relatively forward relative to the base end side by at least the protruding length of the protrusion 23a, and it is set so that it exits the field G upward while roughly maintaining this tilted state.

[0028] As shown in Figure 5, the mulch holding means 14 in this example is configured to use rollers to hold down the mulch film stretched over the field G so that it does not lift off the field G. This mulch holding means 14 may be in the form of a sled or a pipe extending in the direction of travel of the seedling transplanter 1.

[0029] As shown in Figure 3, the crushing means 15 in this example is configured to crush the outer side of the seedling planting claw 23 with a crushing wheel 31 as a roller, and the inner side, which has a narrower space than the outer side, with a pipe 32 extending in the direction of travel of the seedling transplanter 1. When viewed from the side of the seedling transplanter 1, the crushing wheels 31 and pipe 32 are configured to crush the seedlings in the direction of travel F, centered at position B just forward of position A of the rotary case 21 axis. In other words, the crushing means 15 is configured to crush the field around a position just forward of the position where the seedling planting claw 23 will plant the potted seedlings 10 in the field, centered in the direction of travel F of the seedling transplanter 1. The pipe is formed in a generally arc-shaped or U-shaped configuration with a downward projection at its center in side view. Alternatively, as shown in Figure 4, the crushing means 15 may be configured to crush both sides of the seedling planting claw 23 with a pipe 32 extending in the direction of travel of the seedling transplanter 1. A sled can also be used as a suppression means.

[0030] Furthermore, by arranging the mulch holding means 14, seedling planting mechanism 13, and pressing means 15 in this order toward the rear of the seedling transplanter 1 in the direction of travel, the mulch film near the seedling planting mechanism 13 can be pressed down against the field, preventing the mulch film from being torn by components other than the seedling planting claws 23 during planting in the seedling planting mechanism 13. The distance from the mulch holding means 14 to the pressing means 15 in a plan view should be as close as possible, as long as it does not interfere with the operation of the seedling planting mechanism 13.

[0031] According to the seedling planting device 5 of this example configured as described above, in the past, when a mulch film was laid on the surface of the field G, it was necessary to use a cup-type seedling planting device equipped with a cup that forms a planting hole on the surface of the field G. However, when planting the potted seedling 10, the protrusion 23a contacts the planting position in the field G before the root portion 10b, so when a mulch film is laid on the surface, the mulch film at the planting position can be torn in advance by the protrusion 23a, thereby preventing the potted seedling 10 from being damaged by the mulch film. The trajectory of the seedling planting claw 23 is set so that at the lower end position, the tip side of the seedling planting claw 23 tilts around the claw drive shaft 22 so that it is relatively forward relative to the base end side by at least the protruding length of the protrusion 23a, and the seedling planting claw 23 moves upward out of the field G while roughly maintaining this tilted state, so that the seedling can be raised upward out of the field G along a trajectory that prevents the protrusion 23a from hitting the roots 10b of the pot seedlings 10 planted in the field G. Furthermore, with the conventional cup-type seedling planting device, it was difficult to increase the speed because the potted seedlings 10 in an upright position had to be allowed to fall freely vertically into the cup, but with the present invention, such free-fall portions can be reduced, so the potted seedlings 10 can be planted quickly in the field G regardless of whether a mulch film is laid on the surface.

[0032] The machine also includes crushing means 15 for crushing the potted seedlings 10 planted in the field G on both sides in the traveling direction F of the seedling transplanter 1, and the crushing means 15 is configured so that when viewed from the side of the seedling transplanter 1, it crushes the field in the traveling direction F of the seedling transplanter 1, with the center just ahead of the position where the seedling planting tines 23 will plant the potted seedlings 10 in the field G. With this configuration, it is possible to crush the field with the center just ahead of the position where the seedling planting tines 23 will plant the potted seedlings 10 in the field G, thereby quickly stabilizing the planting state of the potted seedlings 10. If the seedling planting claws 23 are configured to compress the potted seedlings 10 mainly behind the position where they are planted in the field G, the seedling planting claws 23 will compress the soil when they are removed from the field, causing the compressed soil to move the potted seedlings 10 forward immediately after planting, causing them to approach the seedling planting claws 23, but this configuration can avoid this problem.

[0033] Furthermore, in front of the rotary case 21, there is provided a mulch pressing means 14 for pressing down the mulch film stretched over the surface of the field G. With this configuration, the mulch film can be prevented from floating up from the surface of the field G during planting, and the mulch film can be prevented from being torn by any part of the seedling transplanter 1 other than the seedling planting claws 23.

[0034] 11 to 13 show a second embodiment of the present invention. This seedling planting device 51 differs from the first embodiment mainly in the following respects. Therefore, parts common to the first embodiment are designated by the same reference numerals and will not be described again.

[0035] 11, when viewed from the side of the machine, the seedling planting device 51 of this example is configured to be compressed by the compression wheels 31 and pipes 32 around position B, which is the same as position A of the axis of the rotary case 21, in the traveling direction F of the machine. In other words, the seedling planting claws 23 are configured to compress the field around the position where the potted seedlings 10 will be planted in the field G in the traveling direction F of the seedling transplanter 1. With this configuration, the seedling planting claws 23 can compress the field around the position where the potted seedlings 10 will be planted in the field G, thereby quickly stabilizing the planting state of the potted seedlings 10.

[0036] 11 and 13, the seedling planting device 51 of this example is equipped with a soil remover 52 for removing soil adhering to the tip of the seedling planting claw 23. The configuration of the soil remover 52 is not particularly limited, but examples include a flexible plate material (for example, a plate material made of synthetic resin or natural resin) and a brush that comes into contact with the tip to scrape off the soil adhering thereto.

[0037] In this example, the soil remover 52 has its base end supported on a frame extending rearward from the machine body, so that the tip of the seedling planting claw 23 projects rearward relative to the rotary case 21, whereby the tip removes soil adhering to the seedling planting claw 23. Because the soil is scraped off at this rearward-protruding position, the removed soil is less likely to hit the seedlings or machinery (such as the compacting means 15) being transplanted. This configuration prevents soil from accumulating on the tip of the seedling planting claw 23, where the protrusion 23a is provided.

[0038] The seedling transplanter of this example can also obtain the same effects as those of the first embodiment with respect to the parts configured in the same manner as those of the first embodiment.

[0039] The present invention is not limited to the above-described embodiment, and can be embodied by making appropriate modifications within the scope of the invention, for example, as follows. (1) The seedling planting claws 23 are driven by a mechanism (such as a gear mechanism) separate from the cam mechanism. (2) The number of seedling planting claws 23 provided in the planting mechanism can be changed as appropriate. [Explanation of symbols]

[0040] 1 Seedling transplanter 4 Seedling stand 5 Seedling planting device 10 potted seedlings 10a Leaf 10b Root 12 Transport mechanism 13 Seedling planting mechanism 14 Multi-holding means 14a Roller 15. Suppression Measures 20 Case drive shaft 21 Rotary Case 22 Claw drive shaft 23 Seedling planting nail 23a Protrusion 23b The part that is pressed against the roots of the potted seedling from the front 24 Seedling planting claw drive piece 25 Camshaft 26 Cam Roller 27 Fixed plate 28 Cam groove 31 Suppression Wheel 32 Pipe 51 Seedling planting device 52 Soil Removal A. Position to plant potted seedlings in the direction of travel of the aircraft B. The center position of the suppression by the suppression means in the direction of the aircraft's movement F Front side of the aircraft (direction of travel) G Field

Claims

1. The potted seedlings are transported in a horizontal position with their leaves facing backward in the direction of travel of the seedling transplanter and their roots facing forward, and are converted into an upright position by seedling planting claws supported by claw drive shafts parallel to the case drive shaft against the outer periphery of a rotary case which is rotated in the same direction as the rotation direction of the running wheels of the seedling transplanter by a case drive shaft parallel to the axle of the running wheels of the seedling transplanter, and then planted in a field. In a seedling planting device, the trajectory of the seedling planting claws, when descending from above to below, describes an arc in the same direction as the rotation direction of the traveling wheels of the seedling transplanter, with the tip of the seedling planting claw facing outward in the radial direction of the case drive shaft of the rotary case, and is pressed against the upper surface of the root portion of the potted seedling from the front side, and continues to describe the arc as the rotary case rotates, thereby descending, converting the potted seedling into an upright position with the root portion of the potted seedling facing downward, and moving to plant it in the field at the lower end position, The seedling planting claw has a protrusion at its tip end that protrudes toward the potted seedling so that the roots of the potted seedling come into contact with the field before the roots come into contact with the field when the potted seedling is planted, The trajectory of the seedling planting claw is set so that at the lower end position, the tip end side of the seedling planting claw is tilted around the claw drive shaft by at least the protruding length of the protrusion so that the tip end side of the seedling planting claw is relatively forward with respect to the base end side, and the seedling planting claw moves upward out of the field while substantially maintaining this tilted state. Seedling planting equipment.

2. 2. The seedling planting device according to claim 1, wherein the portion of the seedling planting claw that is pressed against the root portion of the potted seedling from the front side during planting is formed wide so as to support the root portion at at least two points in the circumferential direction.

3. The seedling planting device is provided with a crushing means for crushing both sides of the potted seedlings planted in the field in the direction of travel of the seedling transplanter, 3. The seedling planting device according to claim 1, wherein the pressure reducing means is configured to reduce the pressure in the field around the position where the seedling planting claws plant the potted seedlings in the field or just ahead of that position in the direction of travel of the seedling transplanter.

4. 3. The seedling planting device according to claim 1, further comprising a mulch pressing means in front of the rotary case for pressing down a mulch film stretched over the surface of the field.

5. 4. The seedling planting device according to claim 3, further comprising a mulch pressing means in front of said rotary case for pressing down a mulch film stretched over the surface of the field.

6. 3. The seedling planting device according to claim 1, further comprising a soil remover for removing soil adhering to the tip of said seedling planting claw.

7. 4. The seedling planting device according to claim 3, further comprising a soil remover for removing soil adhering to the tip of said seedling planting claw.

8. 5. The seedling planting device according to claim 4, further comprising a soil remover for removing soil adhering to the tip of said seedling planting claw.

9. 6. The seedling planting device according to claim 5, further comprising a soil remover for removing soil adhering to the tip of said seedling planting claw.

Images