JP2020156408A - Seedling transplanter - Google Patents

Abstract

To transplant seedlings surely into ridges from a seedling planter after being dropped into the seedling planter from a seedling guide, when feeding the seedlings to a seedling feeder, even if the transplantation seedlings are small and short.SOLUTION: In a seedling transplanter, seedlings fed to a seedling supply cup 25 of a seedling feeder 24 are dropped and fed into a seedling planter 5, and transplanted into ridges by a seedling planter vertical motion mechanism 4. The seedling transplanter is provided with a cylindrical extension seedling guide 95 to be inserted into the seedling planter 5 from a seedling guide 51 of the seedling planter 5.SELECTED DRAWING: Figure 4

Description

The present invention relates to a seedling transplanting machine for transplanting vegetable seedlings to a field.

The seedling transplanting machine described in Patent Document 1 is composed of a seedling supply device for supplying seedlings by an operator and a seedling planter for receiving seedlings falling from the seedling supply device and planting them in ridges while moving up and down.

JP-A-2009-95274

In the seedling supply device, a large number of seedling supply cups circulate and drop the seedlings into the seedling planting body that stands by in the ascending position, and the seedling planting body descends and the seedling planting body is perforated in the ridge surface. The seedlings are opened and the seedlings are dropped and transplanted, but for seedlings with short stems such as scallions, a part of the stem protrudes to the outside at the seedling guide at the top of the seedling planting body and the joint part of the seedling planting body, and is caught and planted. The transplant may fail because it does not fall into the hole.

The present invention ensures that even if the transplanted seedlings are small and short, when the seedlings are supplied to the seedling supply device, the seedlings are dropped from the seedling guide into the seedling planter so that the seedling planter reliably transplants the seedlings to the ridges. That is the issue.

The above-mentioned problem of the present invention is solved by the following technical means.

According to the first aspect of the present invention, the seedlings supplied to the seedling supply cup (25) of the seedling supply device (24) are dropped and supplied into the seedling planting body (5) by the seedling planting body vertical movement mechanism (4). In the seedling transplanting machine to be transplanted to the ridge, a tubular extended seedling guide (95) to be inserted into the seedling planting body (5) from the seedling guide (51) of the seedling planting body (5) is provided. It is a seedling transplanting machine.

According to the second aspect of the present invention, a mounting stay (94) is provided on the seedling supply cup (25), and a rolled and stacked end of a plate-shaped extended seedling guide (95) is pushed on the mounting stay (94) from the inside. The seedling transplanting machine according to claim 1, wherein the seedling transplanting machine is attached in (96).

According to the third aspect of the present invention, the mounting stay (94) is provided on the front side of the seedling supply cup (25) in the transfer direction, and the seedling planting body (5) is opened and closed in the transfer direction of the seedling supply cup (25). The seedling transplanting machine according to claim 2, wherein the seedling transplanting machine is characterized in that.

The invention according to claim 4 is the seedling transplanting machine according to claim 1, wherein the lower portion of the seedling guide (51) is inserted into and attached to the extended seedling guide (95).

The invention according to claim 5 is the seedling transplanting machine according to claim 1, wherein the extended seedling guide (95) having a tubular shape is inserted into the seedling guide (51) and attached.

In the invention of claim 1, the seedlings falling from the seedling supply cup (25) of the seedling supply device (24) to the seedling guide (51) are guided by the extended seedling guide (95) by sliding into the seedling planting body (5). Therefore, even a scallion seedling with a short stem surely falls into the seedling planting body 5 and is transplanted to the ridge.

In the invention of claim 2, in addition to the effect of claim 1, the rounded and overlapped end of the plate-shaped extended seedling guide (95) is pushed from the inside with a push rivet (96) to attach the seedling supply cup (25). Since it is attached to 94), seedlings do not get caught inside the extended seedling guide (95). Further, since the extended seedling guide (95) has a plate shape, there is no need to mold it, and the manufacturing cost is reduced.

In the invention of claim 3, in addition to the effect of claim 2, the seedlings are seedlings without the rolled and stacked ends of the plate-shaped extended seedling guide (95) being sandwiched by the opening and closing of the seedling planting body (5). It does not stay in the plant (5).

In the invention of claim 4, in addition to the effect of claim 1, there is no step caught on the inner wall surface from the seedling guide (51) to the extended seedling guide (95), and the seedlings slide off well.

In the invention of claim 5, in addition to the effect of claim 1, the extension seedling guide (95) can be easily attached to the seedling guide (51).

It is a left side view of the seedling transplanting machine of the Example of this invention. It is a top view of the seedling transplanting machine which omitted a part. It is a perspective view of the seedling transplanting apparatus. It is a side sectional view of the seedling planting body. It is a top view of the seedling planting body. It is an exploded perspective view of a compression wheel.

A seedling transplanting machine 1 according to an embodiment of the present invention will be described below with reference to the drawings.

In the following description, the airframe side on which the steering wheel 2 is arranged is the rear side, and the opposite side, that is, the airframe side on which the engine 3 is arranged is the front side. Then, the right-hand side of the worker standing toward the front side of the machine at the rear of the machine is the right, and the left-hand side is the left.

The seedling transplanting machine 1 includes a beak-shaped seedling planting body 5 that can be opened and closed and moves up and down in connection with a vertical movement mechanism 4 that drives the machine body equipped with a traveling device and a control handle 2 to move up and down. Is provided with a pair of left and right front wheels 6 that are rotatably supported and a pair of left and right rear wheels 7 that are driven and rotated by transmitting the power of the engine 3. By guiding the front wheels 6 and the rear wheels 7 to the ridges, the aircraft can travel on the ridges.

A mission case 8 is arranged at the rear of the engine 3, and an output shaft of the engine 3 is inserted in the mission case 8, and engine power is transmitted from the output shaft of the engine 3 to a transmission mechanism in the mission case 8. It is composed. A chain transmission case 9 is rotatably attached to both left and right sides of the mission case 8 around a rotation fulcrum 9a, and the rotation fulcrum 9a of the chain transmission case 9 is extended from the mission case 8 to the left and right outwards. The tip of the wheel drive shaft enters and transmits the power for traveling to the transmission mechanism in the chain transmission case 9. Then, the power for traveling extends to the rear side of the machine body via the transmission mechanism in the chain transmission case 9 and is transmitted to the axle 10 projecting to the rear end side side, so that the rear wheel 7 is driven and rotated. ..

A hydraulically retractable rolling cylinder 11 for left and right horizontal is provided on the left side of the machine body, and a balance rod 12 is attached to the tip of the piston rod of the horizontal rolling cylinder 11 for left and right so as to be rotatable around the vertical axis. .. Further, the right side of the connecting portion of the balance rod 12 is connected to the rod 13.

The left and right horizontal rolling cylinders 11 and rods 13 are related to the elevating height of the machine frame 20, and extension rods can be connected to each to reduce the transplanting depth of the seedling planting device 23.

When the piston rod 14a protrudes to the rear of the machine based on the detection result of the ridge height detection sensor formed by the front compression wheel 15 described later by the lifting hydraulic cylinder 14 provided in the center of the machine, 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 when viewed from the side of the machine body, and the left and right chain transmission cases 9 rotate accordingly. The left and right rear wheels 7 descend by rotating downward around the fulcrum 9a, and the aircraft rises. On the contrary, when the piston rod 14a of the lifting hydraulic cylinder 14 retracts to the front of the machine body, the left and right arms 16 rotate forward, and the chain transmission case 9 rotates upward around the rotation fulcrum 9a accordingly. Then, the left and right rear wheels 7 rise, and the aircraft descends.

Further, when the left-right horizontal control rolling cylinder 11 expands and contracts, only the left chain transmission case 9 is moved up and down to raise and lower only the left rear wheel 7, and the machine body is tilted left and right. The left-right horizontal control rolling cylinder 11 is configured to operate so that the airframe is horizontally horizontal based on the detection result of a sensor (not shown) that detects the left-right inclination of the airframe with respect to the left-right horizontal.

The pair of front wheels 6 are rotatably attached to an axle 19 fixed to the lower end side of an arm portion 18 extending downward on both left and right sides of a front wheel support frame 17 extending left and right from the left and right center positions below the engine 3. ..

The control handle 2 is attached to the rear end portion of the airframe frame 20 having the front end portion fixed to the mission case 8. The airframe frame 20 is arranged in the center of the left and right sides of the airframe and extends rearward, and extends diagonally rearward and upward from the front-rear intermediate portion. The steering handle 2 extends rearward to the left and right from the rear end of the fuselage frame 20, and each rear end thereof serves as grip portions 2a and 2a of the steering handle 2. The left and right grip portions 2a and 2a of the control handle 2 are appropriately set in height so that the operator can easily grasp the grip portions 2a and 2a by hand. In the illustrated example, the grip portions 2a and 2a are divided into left and right, but the left and right rear end portions of the steering handle 2 may be connected to the left and right to form the connecting portion as the grip portion 2a.

The vertical movement mechanism 4 for operating the seedling planting body 5 is attached to the planting transmission case 22 including a transmission mechanism in which the power for driving the seedling planting body 5 is transmitted from the inside of the mission case 8 via the transmission shaft 21. ing. The planting transmission case 22 is equipped with a transmission mechanism for transmitting power for vertically driving the seedling planting body vertical movement mechanism 4.

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 close to the vertical movement mechanism 4 for a set time. It is provided with a vertical movement mechanism 4 and a clutch mechanism for stopping the vertical movement of the seedling planting body 5. The time for stopping by the intermittent drive mechanism is adjusted by the speed change mechanism provided in the intermittent drive mechanism, and this adjustment allows the seedling planting body 5 to change and adjust between the seedling planting plants.

Further, the seedling supply device 24 that supplies seedlings to the seedling planting device 23 including the seedling planting body 5 serves as a plurality of seedling accommodating bodies (32 in total) that receive the seedlings from above and accommodate the seedlings inside. The supply cup 25, the moving mechanism 26 that orbits the seedling supply cup 25 so as to pass above the seedling planting body 5, and the bottom of the seedling supply cup 25 are opened at a position above the seedling planting body 5. It is provided with a seedling drop supply mechanism 27 for dropping seedlings housed inside and supplying seedlings to the seedling planting body 5.

The seedling supply cup 25 has a tubular body that opens up and down and a bottom lid 25a that opens and closes an opening on the lower side of the tubular body, and is connected to each other in a loop. The moving mechanism 26 is configured to rotate around an elliptical loop-shaped locus that is long to the left and right in a plan view of the airframe. The seedling drop supply mechanism 27 has a configuration in which the bottom lid 25a of the seedling supply cup 25 is opened at a position above the seedling planting body 5. The seedling supply device 24 is configured such that the seedling supply cup 25 orbits around the two seedling planting bodies 5 to supply seedlings.

A connection in which an outer peripheral portion of a cylinder is formed on the outer periphery of the seedling supply cup 25, and two seedling supply cups 25 are connected by having an engaging portion (round hole) rotatably engaged with the outer peripheral portion of the cylinder from the outside. A plurality of bodies 28 are provided, and the engaging portion of the connecting body 28 is rotatably engaged with the outer peripheral portion of the cylinder of the seedling supply cup 25, and the adjacent seedling supply cup 25 is rotatable around the outer peripheral portion of the cylinder as a rotation axis. A plurality of seedling supply cups 25 are connected to each other so as to be connected to each other. That is, the seedling supply cup 25 and the connecting body 28 are connected like an endless chain. As a result, since 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 in an arc shape, the seedlings can be transferred from the seedling supply cup 25 to the seedling planting body 5. The position of the seedling supply cup 25 with respect to the seedling planting body 5 is less likely to be displaced at the supply location, and the seedlings can be properly supplied and the seedlings can be transplanted appropriately.

The moving mechanism 26 engages the seedling supply cups 25, which are connected to each other like an endless chain, with the arcuate notch on the outer circumference of the sprocket 29 for winding provided on the left and right, and winds the sprocket 29 on the left and right. Is driven and rotated by the power taken out from the planting transmission case 22, so that the seedling supply cup 25 is rotated counterclockwise in the plan view of the machine body.

As shown in FIG. 3, the seedling planting device 23 includes a beak-shaped seedling planting body 5 having a downward tip, and a position where the lower end of the seedling planting body 5 is above the ridge surface and from the ridge surface. The vertical movement mechanism 4 that moves the seedling planting body 5 up and down so as to move up and down to the lower position, and the lower end of the beak-shaped seedling planting body 5 closes to accept the seedlings from above and store the seedlings inside. An opening / closing mechanism 50 for opening and closing the seedling planting body 5 is provided in a closed state where the seedling planting body 5 can be opened and when the lower end portion of the seedling planting body 5 opens to the left and right so that the seedlings housed inside can be released downward.

The seedling transplanting machine 1 has a multi-row planting structure in which a plurality of seedling planting bodies 5 are arranged side by side at set intervals on the left and right sides. In this example, two seedling planting bodies 5 are arranged side by side at set intervals on the left and right to form a two-row planting configuration.

The two seedling planting bodies 5 are integrally attached to the vertical movement mechanisms 4 provided on both the left and right sides of the planting transmission case 22. The beak-shaped seedling planting body 5 with the tip facing downward is composed of the left seedling planting body 5L and the right seedling planting body 5R and is divided into left and right, and the left seedling planting body 5L is divided by the opening / closing mechanism 50 described later. And the right seedling planting body 5R rotate in the left-right direction to open the lower end. The left and right seedling planting bodies 5 are configured to move up and down and open and close in synchronization by the vertical movement mechanism 4 and the opening and closing mechanism 50, and two seedlings are planted in a row of trees in the field.

The seedling guide 51 is a tubular body provided above the seedling planting frame 97 to which the seedling planting body 5 is attached and guides the seedlings supplied from the seedling supply device 24 into the seedling planting body 5, and supplies the seedlings. The seedlings that are dropped and supplied from the device 24 can be accurately supplied into the seedling planting body 5.

As shown in FIG. 4, a mounting stay 94 is provided on the left side surface of the seedling guide 51 in a plan view of the machine body, and an extended seedling guide 95 made of a rubber plate is wound around the lower end of the seedling guide 51, and the overlapping portion thereof is attached to the mounting stay 94. Attached with a push rivet 96, the lower end of the extended seedling guide 95 is inserted into the seedling planting body 5. The push rivet 96 is attached to the attachment stay 94 from the inside, and the flat head does not dent the rubber plate and protrude greatly inward. Therefore, there is no gap around the seedling guide 51 and the seedling planting body 5, and even a scallion seedling with a short stem is surely guided into the seedling planting body 5.

The extended seedling guide 95 is attached to the mounting stay 94 provided on the left side surface of the seedling guide 51, and the left seedling planting body 5L and the right seedling planting body 5R rotate in the left-right direction to open the lower end portion. The seedling planting body 5 does not sandwich the 95.

The tubular extended seedling guide 95 may be inserted into the seedling guide 51 and attached.

The vertical movement mechanism 4 of the seedling planting body 5 is provided on both the left and right sides of the planting transmission case 22. Specifically, the upper and lower elevating links are attached to the shafts 58 and 63 protruding to the left and right sides of the planting transmission case 22 so that the front portion can be rotated up and down and the rear portion is connected to the seedling planting body 5. 52, 53, a drive shaft 54 that rotates by driving from the side of the planting transmission case 22, a drive arm 55 that is attached to the drive shaft 54 so as to rotate integrally, and a rotation outer peripheral side of the drive arm 55. It is composed of an interlocking arm 56 that is rotatably connected to the end portion and the upper elevating link 52. Then, the rear end portions (rotating tip portions) of the upper and lower elevating links 52 and 53 are rotatably attached to the connecting member 57 and connected. The seedling planting body 5 is attached to the connecting member 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. In the ascending position of the vertical movement, the lower end of the seedling planting body 5 is located above the field scene, and in the descending position, the lower end of the seedling planting body 5 is located below the field scene.

Further, the rotation fulcrum shaft 58 of the upper elevating link 52 is provided at a position eccentric from the central axis of the output shaft 59 at the tip of the planting output shaft 59 that protrudes from the planting transmission case 22 and is driven to rotate. The rotation of the planting output shaft 59 causes the planting output shaft 59 to move while rotating around the axis of the planting output shaft 59 with the eccentricity (distance between the rotation fulcrum shaft 58 and the axis of the planting output shaft 59) as the radius. By moving the rotation fulcrum shaft 58 back and forth while the upper elevating link 52 is moving up and down, the seedling planting body 5 is tilted back and forth during the elevating movement, and the seedling planting body 5 is viewed from the side. It is configured to move up and down with a loop-shaped operation locus.

Next, the opening / closing mechanism 50 of the seedling planting body 5 will be described with respect to the seedling planting device 23 on the left side shown in FIG. The end of the inner wire 61a of the opening / closing cable 61 is connected to the tip of the right opening / closing arm 60 provided on the upper part of the right seedling planting body 5R, and the left side opening / closing is provided on the upper part of the left seedling planting body 5L. The end of the outer cable 61b of the opening / closing cable 61 is connected to the tip of the arm 62.

An actuating arm 64 having a base rotatably attached to a rotating fulcrum shaft 63 pivotally attached to the base of the lower elevating link 53 is provided, and an inner of the opening / closing cable 61 is provided at the tip of the actuating arm 64. The other end of the wire 61a is connected, and the other end of the outer cable 61b of the opening / closing cable 61 is supported on the machine body side.

Since the seedling planting device 23 on the right side is symmetrical with the seedling planting device 23 on the left side, the end of the outer cable of the opening / closing cable is connected to the tip of the left opening / closing arm to open / close the right side. The structure is such that the end of the inner wire of the opening / closing cable is connected to the tip of the arm.

Then, the operating arm 64 is attached so as to rotate integrally with the planting output shaft 59 that rotates and moves the rotation fulcrum shaft 58 pivotally attached to the base of the upper elevating link 52, and rotates forward at a set timing. It is configured to be.

According to the above configuration, when the seedling planting body 5 moves up and down due to the drive rotation of the drive shaft 54 to reach the lower end position, the operating arm 64 rotates forward and is inner with respect to the outer cable 61b of the opening / closing cable 61. The wire 61a is pulled to the arrow a side and rotates so that the right opening / closing arm portion 60 and the left opening / closing arm portion 62 approach each other, and the right seedling planting body 5R rotates to the right and interlocks with this. Then, the left seedling planting body 5L rotates to the left, and the lower side of the seedling planting body 5 opens to the left and right to open 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 in the action position of the cam, and the inner wire 61a of the opening / closing cable 61 Is loosened, and the lower part of the seedling planting body 5 opened to the left and right closes.

In this way, since the seedling planting body 5 is opened and closed by the opening / closing cable 61, the degree of freedom in connecting the opening / closing cable 61 is higher than that of the conventional opening / closing mechanism using a rod or a link. The left side seedling planting body 5L and the right side seedling planting body 5R can be rotated in different directions (left and right directions) by the operating arm 64 that operates on the operating arm 64, and the seedling planting body 5 can be rotated with a small amount of operation of the operating arm 64. It can be configured to obtain the desired opening / closing amount of. The left seedling planting body 5L and the right seedling planting body 5R are rotationally urged by a spring 65 toward the side where the lower portion of the seedling planting body 5 is closed.

Each of the rotating tip portions (rear end portions) of the vertical elevating links 52 and 53 of the vertical movement mechanism 4 is connected to the connecting member 57 via the vertical connecting shafts 66 and 67, respectively. The connecting member 57 is provided with triangular plates 68 on the left and right sides, and the left and right plates 68 sandwich the tips of the upper and lower elevating links 52 and 53, and the left and right plates 68 are on the rear side. A columnar boss 69 in the left-right direction straddling the boss 69 is provided. Since the connecting shafts 66 and 67 and the boss 69 are arranged near the triangular vertices 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. When the position adjusting shaft 70 described later is slid with respect to the boss 69, 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.

The left and right plates 68 have a substantially regular triangular shape, and the upper and lower connecting shafts 66 and 67 may be turned upside down to attach the connecting member 57. The boss hole at the center of the columnar 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. Therefore, 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 to move the seedlings in the left-right direction. The structure is such that the left and right positions of the planting body 5 can be changed. The change in the left-right position of the seedling planting body 5 is 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 in the drop supply positions 39 and 40. The length of the position adjusting shaft 70 is set so that the distance of the minute can be changed.

That is, the distance between the left and right seedling planting bodies 5 can be changed by an integral multiple (1 times) of the arrangement pitch in the first and second seedling supply cups 25b and 25c, and the boss 69 and the position adjusting shaft 70 can be changed. A planting position changing mechanism capable of moving the seedling planting body 5 is configured.

A rack 70a is provided at the end of the position adjusting shaft 70 having a hexagonal cross section (polygonal shape), and the pinion 71a attached to the rotating shaft of the stepping motor 71 supported and fixed to the outer surface of the triangular plate 68 is described above. Since the position adjusting shaft 70 is configured to mesh with the rack 70a, the position adjusting shaft 70 is supported by the columnar boss 69 by the operation of the stepping motor 71, and can move in the boss 69 in the left-right direction. Therefore, the left and right positions of the seedling planting body 5 can be changed. By changing the left and right positions of the seedling planting body 5, it is possible to make fine adjustments 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 boss 69 is provided with a grease nipple 69a so that the position adjusting shaft 70 can slide smoothly in the boss 69 so that lubricating oil can be appropriately supplied.

The left and right positions of the seedling planting body 5 are adjusted at the timing when the seedling planting body 5 comes out of the soil in the field and rises, and the seedling height planted in the ridge U out of the entire stroke of the seedling planting body 5. If this is done while ascending from the top of the seedling supply cups 25b and 25c to the bottom lid 25a (between the height A in FIG. 5), the planting posture of the seedlings will not be affected. In addition, there is no risk of seedlings being bitten into the bottom lids 25a of the seedling supply cups 25b and 25c. If the left and right positions of the seedling planting body 5 are adjusted at a position lower than the seedling height planted in the ridge U, the seedling planting body 5 may hit the planted seedlings and knock down the planted seedlings.

The ascending timing of the seedling planting body 5 is such that the one-rotation detection switch 72 of the planting output shaft 59, which is switched on every time the predetermined portion of the planting output shaft 59 makes one rotation, raises the seedling planting body 5. When the one-rotation detection switch 72 detects a predetermined position of the planting output shaft 59, the operation control of the stepping motor 71 controls the left and right of the seedling planting body 5. It is a configuration that moves.

Further, as a switch for controlling the operation of the stepping motor 71 that changes the left and right positions of the seedling planting body 5, the reference position X between the rows (the position set as the reference within the change range of the planting position when changing the rows) is changed. If the operation panel 91 shown in FIG. 2 is provided with the reference position setting switch 91a (FIG. 2) and the stroke amount setting switch 91b for determining the stroke amount (distance Y in FIG. 5) with respect to the inter-strip reference position X, the strips The interval setting becomes easy. Then, when the seedling drop supply position of the seedling supply cup 25 after the inter-row adjustment is different from the set value of the stroke amount from the reference position X, the operation of engaging the main clutch (not shown) by the main clutch lever 87. Then, the operator is warned by a buzzer sound or the like.
By adjusting the left and right positions of the seedling planting body 5 in this way, it is possible to set an arbitrary spacing while maintaining the seedling planting work efficiency, and the spacing can be easily changed.

Further, when the operation of the motor 71 is stopped at the top dead center and the bottom dead center of the seedling planting body 5, the seedling planting body 5 stops moving in the left-right lateral direction (moves in the vertical direction). , Stabilization of seedling planting can be achieved. FIG. 7 is a diagram showing the operation of the motor 71 until the seedling planting body 5 moves to the top dead center. FIG. 7 (a) shows the locus of the lower end portion of the seedling planting body 5 seen from the side surface of the elevating link 52, 53, and FIG. 7 (b) shows the seedling planting body 5 seen from the back surface of the elevating link 52, 53. The operation mode of the motor 71 performed between the locus of the lower end portion of the plant and the vertical movement of the seedling planting body 5 is shown.

Further, since the opposite vertices of the hexagonal shape (polygonal shape) of the cross section of the position adjusting shaft 70 are positioned vertically and the cross-sectional coefficient for bending in the vertical direction is improved, seedlings are planted on this position adjusting shaft 70. The strength required to support the body 5 cantilever can be obtained.

At this time, the distance between the left and right drop supply positions 39 and 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 and 25c. Therefore, the respective drop supply positions 39 and 40 can be changed by the arrangement pitch in the seedling supply cup 25, and the distance between the left and right drop supply positions 39 and 40 is the first and second seedlings. The distance changes by an integral multiple (1 times) of the arrangement pitch in the supply cups 25b and 25c (even times (2 times) the arrangement pitch in the seedling supply cup 25).

According to the above configuration, while the vertical movement of the seedling planting body 5 is operated for one cycle by the operation of the vertical movement mechanism 4, the first and second seedling supply cups 25b and 25c are arranged by the arrangement pitch (one row of seedlings). (2 pieces of supply cup 25) Move around. Further, the timing at which the bottom lid 25a of the seedling supply cup 25 opens at the drop supply positions 39 and 40 is set so that the seedling planting body 5 rises to just below the seedling supply cup 25. As a result, the seedling supply cup 25 can simultaneously supply the seedlings to the two seedling planting bodies 5 without causing a seedling supply omission while passing above the two seedling planting bodies 5 in series. The seedlings can be supplied to the two seedling planting bodies 5 without leaving a seedling supply cup 25 in which the seedlings were not supplied after passing above the seedling planting bodies 5, and the seedling supply work can be performed. It can be done with a margin, and seedlings can be reliably supplied to the two seedling planters 5.

Further, the seedling transplanting machine 1 has compression rings 15 and 73 in the front and rear, and the pair of front suppression rings 15 not only level the ridges before planting the seedlings, but also provide sensor rings for adjusting the height of the seedlings. It also has a function of adjusting the height of the airframe by operating the hydraulic valve (not shown) in the mission case 8 to operate the lifting hydraulic cylinder 14 according to the ground contact position of the front suppression wheel 15. .. In addition, the rear suppression ring 73 suppresses the soil around the seedlings while covering the area around the planted seedlings. The front and rear suppression wheels 15 and 73 can be stored on the upper side by operating the lever 74 when the aircraft is turning.

A left-right support shaft 76 extending in the left-right direction is provided at a rotating tip of an arm 75 that rotates up and down integrally with the lever 74, and the lower end of the up-down support shaft 77 provided so as to penetrate the left-right support shaft 76 up and down. A rear compression ring 73 is rotatably provided on the portion. The upper and lower support shafts 77 are provided for each planting strip, and two are provided on the left and right. Further, the left and right support shaft 76 includes left and right movable portions through which the upper and lower support shaft 77 penetrates, and a fixed portion connected to the arm 75 between the left and right movable portions, and the movable portion is the fixed portion. It is configured to slide in the direction of the axis 76 (left-right direction). Therefore, the rear suppression ring 73 can be moved left and right by sliding the movable portion in accordance with the change in the left and right positions of the left and right seedling planting bodies 5. The front compression ring 15 may also be moved left and right in accordance with the left and right movement of the rear suppression wheel 73.

FIG. 6 shows an exploded perspective view of the compression rings 15 and 73, and the lid plate 101 is attached to the large diameter side of the ring body 100 formed in a conical shape by a thin iron plate with the seal ring 102 and the molding 103 sandwiched between them. I try not to enter.

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

The step 80 includes a main step 82 arranged between the seat 79 and the seedling supply device 24 in a plan view of the machine body, and sub-steps 83 provided on both the left and right sides of the seat 79 and the bonnet 78. The sub-step 83 extends back and forth from the front end of the machine to near the main step 82, and the front 83a is configured at a position one step lower than the rear 83b so that an operator can get on and off from the front end of the machine. It is configured in. An elevating mechanism (rolling cylinder 11, rod 13, etc.) for elevating and lowering the wheels (rear wheels) 7 can be arranged below the rear portion 83b, which is the upper stage of the sub-step 83, effectively utilizing the space of the machine body. We are trying to make the aircraft more compact.

Further, a chain transmission case 9 which is a traveling transmission case that rotates up and down can be arranged below the rear portion of the sub step 83 according to the tread change of the wheel (rear wheel) 7. Further, a rising portion 82a that rises by inclining upward is provided at the rear end of the main step 82, and the feet of the worker sitting on the seat 79 are moved by the rising portion 82a to the vertical movement mechanism 4 of the seedling planting device 23. It protects against contact. Further, by locating the rising portion 82a below the seedling supply device 24, the front-rear length of the machine body can be shortened. Further, the strength of the main step 82 is improved by providing the rising portion 82a. The rising portion 82a can cut off the drive of the left and right rear wheels 7, the seedling planting device 23, the seedling supply device 24, the main clutch lever 84 for riding, and the left and right rear wheels 7. The left and right side clutch pedals 85 are provided so that the 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, but the sub-step 83 may be provided on only one of the left and right sides. In this case, the sub-step 83 is provided on the side (left side) of the seat 79 where the support frame 81 is not provided. If the step 83 is provided, the support frame 81 can be easily boarded and disembarked by the sub-step 83 without getting in the way.

At the front end of the machine body between the left and right front wheels 6, a ridge end sensor 86 is provided on the upper surface of the ridge U to detect the end of the ridge U, and the ridge end sensor 86 has no ridges due to the advancement of the machine. It is configured to detect that the end of the ridge has been reached by reaching the place and not detecting the upper surface of the ridge. Based on the detection of the end of the ridge by the ridge end sensor 86, the main clutch is automatically disengaged to stop the drive of the left and right rear wheels 7, the seedling planting device 23 and the seedling supply device 24, and the aircraft is stopped. At the same time, an alarm (for example, a warning sound such as a buzzer) is issued to notify the operator.

The worker sitting in the seat 79 faces backward with respect to the traveling direction of the aircraft, and it is difficult to check the front of the aircraft because he concentrates on the seedling supply work, and he does not notice that the aircraft has reached the end of the ridge, and the surroundings. There is a risk of causing an accident such as a collision with a structure, but the ridge end sensor 86 automatically stops the aircraft at the end of the ridge and an alarm notifies that the end of the ridge has been reached, so work can be done safely. It can be done, and the seedling supply work to the seedling supply device 24 can be concentrated without worrying about the situation in front of the machine body and the position of the end of the ridge, and the planting work efficiency is improved. The ridge end sensor 86 is arranged at a position to the right of the center of the left and right sides of the aircraft (treads of the left and right wheels 6 and 7), and 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. Further, the ridge end sensor 86 is located at a left-right position (right front pressure ring 15 and seedling planting) avoiding the front pressure ring 15 for controlling the ground height of the aircraft and the seedling planting position of the seedling planting body 5. Since it is provided on the left side of the position), it does not damage the soil at the seedling planting position and does not reduce the planting accuracy.

Further, near the steering handle 2, the left and right rear wheels 7, the seedling planting device 23, the main clutch lever 87 for manually turning on and off the drive of the seedling supply device 24, and the seedling planting device 23 and the seedling supply device 24 It is equipped with a planting operation lever 88 that manually turns on and off only the drive. It should be noted that the planting operation lever 88 can be used to operate the lifting hydraulic cylinder 14 to manually raise and lower the machine body. Then, a sensor (detecting 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 driving state by the planting operation lever 88. The structure is such that the automatic stop control and alarm of the aircraft are activated by the above-mentioned ridge end sensor 86.

As a result, the automatic stop control and alarm of the machine can be activated only during the planting work, and the ridge end sensor 86 does not detect the upper surface of the ridge when the machine is moving or turning at the ridge end, which makes the machine unnecessary. Can be prevented from stopping and operability is improved. In addition, instead of or in combination with the automatic stop control of the aircraft by the planting operation lever 88 and the on / off of the alarm operation, a seating sensor for detecting that the worker is seated is provided in the seat 79, and the seat 79 is operated. The automatic stop control and the alarm of the aircraft may be activated only when the person is seated. Further, the ridge end sensor 86 can detect the ridge end, and the alarm is activated first, and the aircraft automatically stops after a predetermined time (several seconds). The automatic stop of the airframe may be performed by stopping the engine 3.

Seedling stands 89 are arranged on the left and right sides of the seat 79. The seedling mounting table 89 lacks a part of the square bottom surface of the seedling storage frame (seedling box, seedling tray, seedling container, etc.) on which the seedling storage frame is placed, and the outer edge of the missing part is the seedling supply device 24. The shape is such that it follows the arcuate 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. ..

Further, the seedling mounting table 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 the worker sitting on the seat 79 can move. It can be arbitrarily moved to a position where it is easy to replenish seedlings, and when getting on and off from the front end of the aircraft via step 80, it can be moved outward in the left-right direction from step 80 (sub-step 83) so that it does not interfere with getting on and off. When loading on a truck or storing in a warehouse, the width of the aircraft can be reduced by moving it inward in the left-right direction. The seedling mounting table 89 may be moved outward in the left-right direction to a position where it does not overlap above the seedling supply cup 25 of the seedling supply device 24.

Further, the moving link mechanism 90 has a configuration in which the link lengths of the respective links are different, and when the seedling mounting table 89 is moved inward in the left-right direction for supplying seedlings to the seedling supply device 24, the seedlings The mounting table 89 is configured to face diagonally backward and inward. As a result, the seedling replenishment work can be facilitated.

4 Seedling plant vertical movement mechanism 5 Seedling plant 24 Seedling supply cup 25
51 Seedling guide 94 Mounting stay 95 Extended seedling guide 96 Push rivet

Claims (5)

A seedling transplanting machine that drops the seedlings supplied to the seedling supply cup (25) of the seedling supply device (24) into the seedling planting body (5) and transplants them to the ridges by the seedling planting body vertical movement mechanism (4). The seedling transplanting machine is characterized in that a tubular extended seedling guide (95) is provided from the seedling guide (51) of the seedling planting body (5) into the seedling planting body (5). A mounting stay (94) was provided on the seedling supply cup (25), and the rolled and stacked ends of the plate-shaped extended seedling guide (95) were mounted on the mounting stay (94) from the inside with push rivets (96). The seedling transplanting machine according to claim 1, wherein the seedling transplanting machine is characterized. The claim is characterized in that the mounting stay (94) is provided on the front side of the seedling supply cup (25) in the transfer direction, and the seedling planting body (5) is opened and closed in the transfer direction of the seedling supply cup (25). The seedling transplanting machine according to 2. The seedling transplanting machine according to claim 1, wherein the lower portion of the seedling guide (51) is inserted into and attached to the extended seedling guide (95). The seedling transplanting machine according to claim 1, wherein the extended seedling guide (95) having a tubular shape is inserted into the seedling guide (51) and attached.