JP6948929B2 - Seedling transplanter - Google Patents

Description

The present invention relates to a seedling transplanting machine for planting vegetable seedlings such as onions in a field.

For example, as disclosed in Patent Documents 1 and 2, a seedling transplanting machine in which a seedling supply device and a seedling planting device are provided on a traveling machine having left and right traveling wheels is known. The seedling supply device includes a seedling stand on which a seedling tray in which pot seedlings are arranged in a matrix is placed. The seedling planting device has a transplanting mechanism having a transplanting cup (sometimes called a piercer or a seedling planting claw) for holding the pot seedling and transplanting it to the field, and a seedling extraction claw for removing the pot seedling from the seedling tray. It is equipped with a succession mechanism that is taken out and transferred to the transplant cup.

In the transplanting mechanism provided in the seedling transplanting machine described in Patent Documents 1 and 2, the second rotary case is attached to the side surface of both tip portions of the first rotary case, and the transplanting cup is supported by each of the second rotary cases. Has been done. According to this configuration, a pair of transplanting cups plant seedlings at two locations along a single row while the first rotary case makes one rotation, so that high-speed seedling transplanting work can be realized. FIG. 9 shows the rotational static loci of the pair of transplant cups disclosed in Patent Documents 1 and 2. In FIG. 9, the pair of transplant cups 150 and 150 are supported by support shafts 184 and 184 provided in the second rotary case (not shown), and have an elliptical rotating static locus E long in the vertical direction. draw.

By the way, in the seedling transplanting machine, the rotation of the transplanting cups 150 and 150 may be temporarily stopped in order to widen the space between the plants (planting interval). In this case, the pair of transplant cups 150 and 150 are temporarily stopped at positions S1 and S2 which are substantially the same height as each other in the rotational static locus E shown in FIG. This is because when one transplant cup 150 is stopped above the positions S1 and S2, the stop position of the other transplant cup 150 is lower than the positions S1 and S2, and the transplant cup 150 approaches the field scene. This is because there is a concern that it will be dragged.

The seedling supply to the transplanting cup 150 is performed by dropping the pot seedlings from the seedling taking-out claw 161 of the inheritance mechanism from above the position S1 (position S2 is also possible) and receiving the pot seedlings by the transplanting cup 150. In order to improve the stability of the seedling supply, it is desirable to bring the seedling withdrawal claw 161 as close as possible to the transplanting cup 150 (that is, arrange the seedling withdrawal claw 161 below). However, from the viewpoint of avoiding interference between members, the seedling taking-out claw 161 cannot be arranged inside the rotating static locus E, and since the rotating static locus E has a shape protruding upward, the seedling taking-out claw 161 is placed in the transplant cup 150. It was difficult to place them close to the plant, and therefore the seedling supply to the transplant cup 150 could become unstable.

Japanese Patent No. 3115292 Japanese Patent No. 4318128

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a seedling transplanting machine capable of improving the stability of seedling supply while realizing high-speed seedling transplanting work.

The seedling transplanting machine according to the present invention has a rotation center axis, a first rotary case that rotates about the rotation center axis, and a rotation support provided on the side surfaces of both tip portions in the rotation diameter direction of the first rotary case. A shaft, a pair of second rotary cases that rotate around the rotary support shaft, and a pair that are arranged at positions deviated from the rotary support shaft and rotatably provided with respect to the second rotary case. A pair of transplants that are supported by the relative rotation support central axis and the relative rotation support central axis, and whose posture is controlled so as to always face downward regardless of the rotation phase of the first rotary case. A cup for transplantation is provided, and the static rotation locus of the transplantation cup as seen from the axial direction of the central axis of rotation is an inverted triangular shape.

In this seedling transplanting machine, since the transplanting cup is supported in each of the second rotary cases attached to both tips of the first rotary case, the first rotary case rotates once to follow a single row. Seedlings are planted in two places. Moreover, since the rotational static locus of the transplanting cup has an inverted triangular shape that does not protrude upward, it becomes easy to arrange the seedling taking-out claws close to the transplanting cup. Therefore, according to this seedling transplanting machine, it is possible to improve the stability of seedling supply while realizing high-speed seedling transplanting work.

When the pair of transplant cups rotate in an inverted triangular rotating static locus, it is preferable to pause at or near the upper base extending horizontally in the rotating static locus. According to this configuration, the transplanting cups are suspended at or near the upper bottom, which is the top dead center, so that the pair of transplanting cups are suspended at an appropriate distance from the field scene, and the seedling supply is stable. The sex can be surely enhanced.

When the pair of transplant cups rotate while drawing an inverted triangular rotating static locus, it is preferable to pause below the upper bottom extending horizontally in the rotating static locus. According to this configuration, it is convenient to suspend a pair of transplanting cups that are 180 degrees out of phase with each other near the upper bottom, which is the top dead center, and the stability of seedling supply is improved. Useful for surely enhancing.

It is preferable that the second rotary case makes two rotations about the rotation support shaft while the first rotary case makes one rotation about the rotation center axis. According to this configuration, it is convenient to configure the transmission mechanism in the first and second rotary cases so that the rotational static locus of the transplant cup has an inverted triangular shape.

Left side view schematically showing an example of a seedling transplanting machine according to the present invention. Side view of the main part of the seedling supply device and the seedling planting device Schematic plan view of the transplantation mechanism Schematic cross-sectional view of the transplantation mechanism Schematic side view of the first rotary case and the second rotary case when the longitudinal direction of the first rotary case is oriented in the horizontal direction and the vertical direction. Schematic side view of the first rotary case and the second rotary case when the longitudinal direction of the first rotary case points in the forward tilt direction and the backward tilt direction. The figure which continuously shows the displacement of the 2nd rotary case The figure which shows the rotation static locus of a transplant cup The figure which shows the rotation static locus of the transplanting cup in the seedling transplanting machine described in the prior art.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the left side surface of the seedling transplanting machine 100 of the present embodiment. In the figure, the front-back direction and the up-down direction of the seedling transplanting machine 100 are indicated by arrows.

FIG. 1 shows a seedling transplanting machine 100 for planting vegetable seedlings such as onions in a field. The seedling transplanting machine 100 is a riding type seedling transplanting machine. The seedling transplanting machine 100 is configured to be able to simultaneously execute a plurality of rows (two rows in this embodiment) of seedling transplanting operations. The seedling transplanting machine 100 is arranged behind the traveling machine 1 functioning as a towing vehicle, the seedling supply device 2 arranged behind the traveling machine 1 (to the right in FIG. 1), and the seedling supply device 2. It is provided with a seedling planting device 3.

The traveling machine body 1 is composed of a lower body 11 and an upper body 12 provided above the lower body 11. The lower body 11 is formed with a connecting frame 15 interposed between the mission case 13 and the rear axle case 14. The connecting frame 15 is formed of a pipe material having a quadrangular cross section, and extends linearly in the front-rear direction. An engine 16 as a prime mover is mounted on the connecting frame 15 via a bracket. A mission case 13 is interlocked and connected to the engine 16. The rear axle case 14 and the front axle case 17 are interlocked and connected to the mission case 13.

The traveling wheels that support the traveling machine body 1 are composed of a pair of left and right front wheels 20 and 20 and a pair of left and right rear wheels 22 and 22. The front wheels 20 and 20 are attached to the ends of the front axle case 17 via the front axle 21. The front axle case 17 extends downward from the outer end of the shaft case 18 extending outward from the side wall of the mission case 13. The rear wheels 22 and 22 are attached to the left and right ends of the rear axle case 14 via the rear axle 23. The traveling wheels are provided so as to be able to move up and down, so that even if the traveling road surface has an uneven shape, it can follow.

A cover body 24 that covers the periphery of the handle column and a handle 25 that is supported via the handle column are provided on the front portion of the upper body 12. A driver's seat 26 on which the operator is seated is provided in the central portion of the upper body 12. The operator can drive the seedling supply device 2 and the seedling planting device 3 while operating the seedling transplanting machine 100 in the driver's seat 26 to move in the field, and can execute the seedling transplanting operation for planting seedlings in the field. Spare seedling stands 28 for placing spare seedling trays are provided on both the left and right sides of the handle 25. A space 27 is formed in the rear portion of the upper body 12 for the operator to transfer the seedling tray from the spare seedling stand 28 to the seedling supply device 2. The empty seedling tray is stored in the spare seedling stand 28.

The seedling supply device 2 is attached to the traveling machine body 1 via an elevating mechanism 4. The elevating mechanism 4 includes a top link piece 31 extending in the front-rear direction, a pair of left and right lower link pieces 32, a rear end connecting piece 33, and a single-acting elevating cylinder 34. The elevating mechanism 4 is attached to an elevating mechanism support 19 provided behind the traveling machine body 1 so as to be vertically rotatable. When the elevating cylinder 34 is shortened by supplying pressure oil, the rear end connecting piece 33 rises, and the seedling supply device 2 and the seedling planting device 3 rise accordingly. On the other hand, when the elevating cylinder 34 is extended by discharging the pressure oil, the seedling supply device 2 and the seedling planting device 3 are lowered by their own weight.

An elevating sensor roller 35 is arranged below the seedling supply device 2. The elevating sensor roller 35 moves up and down along the unevenness of the ridge surface of the field. The hydraulic circuit of the elevating cylinder 34 is switched in conjunction with the elevating operation of the elevating sensor roller 35, and the elevating mechanism 4 is operated so that the transplanting depth (planting depth) is maintained constant. Behind the elevating sensor roller 35 and behind the transplanting cup 50, which will be described later, a soil covering ring 36 for covering the seedlings immediately after transplanting is arranged.

As shown in FIGS. 1 and 2, the seedling supply device 2 includes a seedling mounting table 42 on which a seedling tray 41 in which pot seedlings N are arranged in a matrix is placed. The seedling tray 41 is provided with a seedling pot portion 41a in a matrix shape in the front-rear direction and the left-right direction. Each of the seedling pot portions 41a contains pot seedlings N (not shown in FIG. 1) to be transplanted. The seedling stand 42 is configured to be able to reciprocate in the left-right direction by a lateral feed mechanism. Further, the seedling mounting table 42 is configured so that the seedling tray 41 can be intermittently moved backward by one pitch (the length of one seedling pot portion 41a) at the end position of the horizontal feed by the vertical feed mechanism. There is.

The vertical feed mechanism includes a large-diameter sprocket 43 attached to a drive shaft driven via a power transmission system, a small-diameter chain sprocket 44 attached to a driven shaft, and a pair of left and right transports wound around them. Includes chain 45 and. The seedling tray 41 mounted on the transport chain 45 is transported backward and downward along the direction of arrow C in FIG. 2 by this vertical feed mechanism. Since the seedling tray 41 is made of a flexible material (for example, a soft synthetic resin material), it can be curved along the outer circumference of the large-diameter sprocket 43 when mounted on the transport chain 45 and transported. Is.

As shown in FIG. 1, power is transmitted to the seedling supply device 2 via a transmission path via a power intake shaft 37 extending in the left-right direction. The same applies to the seedling planting device 3. The power intake shaft 37 is interlocked with the transmission case 13 via a transmission mechanism including a transmission shaft 38 extending in the front-rear direction between the pair of rear wheels 22, 22. The clutch case disposed in the middle of the transmission mechanism has a built-in clutch mechanism equipped with a planting clutch, an inter-stock adjustment mechanism, and the like (neither is shown).

As shown in FIG. 2, the seedling planting device 3 has a transplanting mechanism 5 having a transplanting cup 50 for holding a pot seedling N to be transplanted and transplanting to a field, and a pot from a seedling pot portion 41a of a seedling tray 41. The seedling N is provided with a succession mechanism 6 for taking out the seedling N with the seedling taking-out claw 61 and transferring the seedling N to the transplanting cup 50. As will be described later, in the present embodiment, the transplantation mechanisms 5 are provided at four locations in the left-right direction, and the inheritance mechanisms 6 are also provided at four locations in the left-right direction correspondingly.

The inheritance mechanism 6 has a seedling taking-out claw 61 for taking out the pot seedling N contained in the seedling pot portion 41a and dropping the pot seedling N from above toward the transplanting cup 50 of the transplanting mechanism 5. The seedling extraction claw 61 is formed of a pair of left and right rod-shaped members having a tapered shape. The pair of left and right rod-shaped members are always urged to close by a spring (not shown), but are configured to open against the urging force in one section of the rotation angle by the action of the cam plate 62. Has been done. The seedling extraction claw 61 is inserted into the tip of an extrusion member 60 which is bent into an L shape and formed in a ring shape.

The seedling extraction claw 61 is attached to a seedling extraction arm 66 having a guide shaft 65. The guide shaft 65 is slidably fitted in the guide groove 63 formed in the guide plate 67. Due to the rotation of the rotary case (not shown) driven via the power transmission system, the seedling taking-out claw 61 is transplanted through a posture in which the tip portion penetrates into the seedling pot portion 41a and holds the pot seedling N. It follows the trajectory 64 of returning to the upper part of the cup 50. When the seedling taking-out claw 61 following the locus 64 is located above the transplanting cup 50, the extruding member 60 pushes out the pot seedling N stuck in the seedling taking-out claw 61 and drops it. The dropped pot seedling N is received by the transplanting cup 50, and the seedlings are supplied to the transplanting cup 50.

The inheritance mechanism 6 of the traveling machine 1, the seedling supply device 2, and the seedling planting device 3 described above can be configured in the same manner as a normal seedling transplanting machine, and all of conventionally known shapes, materials, mechanisms, and the like can be configured. It can be adopted in the present invention.

As described above, in the present embodiment, the two-row seedling transplanting work can be performed at the same time. Further, as shown in FIG. 3, the seedling planting device 3 is provided with transplanting mechanisms 5 at four locations in the left-right direction, and a pair of left and right transplanting mechanisms 5 and 5 are arranged side by side with respect to a single row (one row of planting rows). It is set up. In the pair of left and right transplanting mechanisms 5 and 5 arranged side by side, the transplanting cups 50 located on the left and right sides are inclined symmetrically with respect to the planting strip when viewed from the front-rear direction, and their planting positions are simply set. It is structured to match one article.

A plurality of transplant cups 50 can be provided in at least one of the left and right sets of transplant mechanisms 5 and 5 arranged side by side with respect to a single row. In the present embodiment, of the pair of left and right transplanting mechanisms 5 and 5 arranged side by side, one has two transplanting cups 50 and the other has one transplanting cup 50. For convenience, the former is distinguished as the transplant mechanism 5W and the latter as the transplant mechanism 5S. The three transplanting cups 50 included in the pair of left and right transplanting mechanisms 5 and 5 (that is, the transplanting mechanism 5W and the transplanting mechanism 5S) arranged side by side are configured so that their planting positions are aligned with a single row.

As shown in FIG. 3, the transmission shaft 70, which is the input shaft of the transplant mechanism 5, is via a transmission chain 73 wound around the sprockets 71 and 72 and a transmission chain 76 wound around the sprockets 74 and 75. Then, power is transmitted from the power intake shaft 37. The input unit 77 is interlocked and connected to the output unit 79 arranged on the transmission shaft 70 via a transmission shaft 78 that can be bent in the middle and expands and contracts in the axial direction. The rotation center shaft 80 is an output shaft protruding from the input unit 77 in the left-right direction. The first rotary case 81 rotates about the rotation center axis 80.

FIG. 4 is a schematic cross-sectional view of the transplantation mechanism 5 (5W) located at the right end. As shown in FIGS. A rotary support shaft 83 provided on the side surface, a pair of second rotary cases 82 and 82 that rotate around the rotary support shaft 83, and a second rotary case arranged at a position deviated from the rotary support shaft 83. A relative rotation support central shaft 84 rotatably provided with respect to the 82 and a pair of transplant cups 50 and 50 supported by the relative rotation support central shaft 84 are provided. The pair of transplant cups 50, 50 are attitude-controlled so as to always face downward regardless of the rotation phase of the first rotary case 81.

The above configuration will be described in more detail. As shown in FIG. 4, the rotation center axis 80 projects from the input unit 77 toward the left side. The rotation center shaft 80 is inserted so as to be relatively rotatable with respect to the tubular portion 77p protruding from the input portion 77. The tubular portion 77p is fixed to the input portion 77, but is configured to be rotatable relative to the first rotary case 81. The tip of the rotation center shaft 80 is fixed to the first rotary case 81 via bolts or the like. Therefore, the first rotary case 81 rotates integrally with the rotation center shaft 80.

The first rotary case 81 includes a first sun gear 85, a pair of first driven gears 86 and 86 located at both ends of the first rotary case 81, and a pair of first driven gears 86 and a pair of first sun gear 85. A pair of first intermediate gears 87 and 87 that mesh with the 86 are built in. The first sun gear 85 is a fixed gear fixed to the outer circumference of the tubular portion 77p, and the first sun gear 85 does not rotate even if the first rotary case 81 rotates. The reduction ratio (gear ratio) from the first sun gear 85 to the first driven gear 86 is 1/3 (that is, triple speed), and the number of teeth Z _a1 of the first sun gear 85 and the teeth of the first driven gear 86. The relationship with the number Z _{c1 is expressed by the equation Z a1} : Z _c1 = 3: 1.

A rotary support shaft 83 is fixed to each of the pair of first driven gears 86 and 86, respectively. The rotary support shaft 83 projects from the first rotary case 81 toward the left side. The rotary support shaft 83 is inserted so as to be relatively rotatable with respect to the tubular portion 81p protruding from the first rotary case 81. The tubular portion 81p is fixed to the first rotary case 81, but is configured to be rotatable relative to the second rotary case 82. The tip of the rotary support shaft 83 is fixed to the second rotary case 82 via bolts or the like. Therefore, the second rotary case 82 rotates (rotates) integrally with the rotation support shaft 83, and rotates (revolves) around the rotation center shaft 80.

The second rotary case 82 includes a second sun gear 88 fixed to the outer circumference of the tubular portion 81p, a second driven gear 89 fixed to the relative rotation support central shaft 84, a second sun gear 88, and a driven gear. A second intermediate gear 90 that meshes with the 89 is built in. The relative rotation support central shaft 84 is arranged at a position deviated from the rotation support shaft 83 of the second rotary case 82. The reduction ratio (gear ratio) from the second sun gear 88 to the second driven gear 89 is 3/2 (that is, 2/3 times speed), and the number of teeth Z _a2 of the second sun gear 88 and the second driven gear 89. The relationship with the number of teeth Z _{c2 is expressed by the equation Z a2} : Z _c2 = 2: 3.

A relative rotation support central shaft 84 is fixed to the second driven gear 89. The relative rotation support central shaft 84 projects from the second rotary case 82 toward the left side. The relative rotation support central shaft 84 is inserted so as to be relatively rotatable with respect to the tubular portion 82p provided on the left side surface of the second rotary case 82. The relative rotation support central shaft 84 and the tubular portion 82p are configured to be rotatable relative to the second rotary case 82, respectively. The transplant cup 50 is supported by a relative rotation support central shaft 84 via a link mechanism 95. Therefore, the transplant cup 50 is rotatably supported relative to the second rotary case 82.

The second rotary case 82 further includes a third sun gear 91 fixed to the outer circumference of the tubular portion 81p, a third driven gear 92 fixed to the outer circumference of the tubular portion 82p, and a third sun gear 91 and a third. A third intermediate gear 93 that meshes with the driven gear 92 is built in. The reduction ratio (gear ratio) from the third sun gear 91 to the third driven gear 92 is 1, and the relationship between the _{number of teeth Z a3} of the third sun gear 91 and the number of teeth Z _{c3 of the third driven gear 92 is} It is expressed by the equation of Z _a3 : Z _{c3 = 1: 1.} The tubular portion 82p protrudes from the second rotary case 82 toward the left side, and the cam body 94 is fixed to the outer periphery of the protruding portion.

The transplant cup 50 is supported by a relative rotation support central shaft 84 via a link mechanism 95. The transplant cup 50 is formed of a pair of cup bodies 50a and 50b (see FIG. 3) in which a substantially conical member that narrows downward is divided in half in the front-rear direction. The pair of cup bodies 50a and 50b are always urged to close by a spring (not shown). The cam body 94 and the link mechanism 95 are linked so as to open the lower end sides of the pair of cup bodies 50a and 50b against the urging force of the spring when the transplanting cup 50 is located within a predetermined range. There is. The reduction ratio from the third sun gear 91 to the third driven gear 92 is 1, and the cam body 94 also rotates once in accordance with one rotation of the rotation center shaft 80 (that is, one rotation of the first rotary case 81).

In the above predetermined range, the longitudinal direction of the first rotary case 81 (the side on which the pair of second rotary cases 82, 82 are mounted) points in the vertical direction, and the vicinity of the inverted triangular apex of the rotational static locus T described later. Is the range. As a result, immediately after the lower end of the transplant cup 50 located below rushes into the field scene, the lower ends of the pair of cup bodies 50a and 50b are opened, and the held pot seedlings are transplanted to the field and the transplant cup is used. After the lower end of the 50 is extracted from the field scene, the lower end side of the pair of cups 50a and 50b is closed above the transplanted seedlings, so that the transplanting cup 50 is opened and closed.

5 and 6 are schematic side views of the first rotary case 81 and the second rotary case 82 shown in FIG. 4 as viewed from the axial direction of the rotation center axis 80, and some of them are built in the case. The gears of are shown schematically. In FIG. 5, a state in which the longitudinal direction of the first rotary case 81 is oriented in the horizontal direction and a state in which the longitudinal direction of the first rotary case 81 is oriented in the vertical direction are shown superimposed. In FIG. 6, a state in which the longitudinal direction of the first rotary case 81 is oriented in the forward tilting direction and a state in which the longitudinal direction of the first rotary case 81 is oriented in the backward tilting direction are shown superimposed.

In FIGS. 5 and 6, when the first rotary case 81 is rotated (rotated) in the direction of arrow A (counterclockwise direction) via the rotation center axis 80, the rotations provided at both tips of the first rotary case 81 are rotated. The support shaft 83 rotates (revolves), and the second rotary case 82 also rotates in the same direction. Further, since the first driven gear 86 fixed to the rotary support shaft 83 meshes with the first sun gear 85 via the first intermediate gear 87, it rotates clockwise in FIGS. 5 and 6 and is accompanied by it. The second rotary case 82 also rotates in the same direction. In this way, the first rotary case 81 rotates counterclockwise, while the second rotary case 82 rotates clockwise. That is, the second rotary case 82 rotates in the direction opposite to the rotation direction of the first rotary case 81.

Then, while the first rotary case 81 makes one rotation about the rotation center shaft 80, the second rotary case 82 is configured to make two rotations about the rotation support shaft 83. The rotary support shaft 83 draws a circular static locus M having a radius of gyration R while the first rotary case 81 makes one rotation. Further, by setting the reduction ratio from the second sun gear 88 of each second rotary case 82 to the second driven gear 89 to which the relative rotation support central shaft 84 is fixed to 3/2, the first rotary case 81 Regardless of the rotation phase of the above, the posture of the transplant cup 50 supported by the relative rotation support central shaft 84 is controlled so as to always face downward.

FIG. 7 continuously shows the displacement of the second rotary case 82 with respect to the rotation center axis 80. As shown in FIG. 7, the rotation locus of the second rotary case 82 with respect to the first rotary case 81 (that is, the rotational static locus M of the rotary support shaft 83) and the relative rotation support central shaft 84 with respect to the second rotary case 82. In relation to the relative displacement of, the relative rotation support central axis 84 draws an inverted triangular rotational static locus T in which the apex is downward and the upper base is horizontal. This also applies to the transplant cup 50 supported by the relative rotation support central shaft 84. In FIG. 8, in addition to the rotating static locus T, the rotating static locus Te followed by the lower end of the transplant cup 50 is also shown, and the rotating static locus T and the rotating static locus Te are congruent with each other. As described above, the rotational static locus T (and the rotational static locus Te) of the transplant cup 50 viewed from the axial direction of the rotation central axis 80 has an inverted triangular shape. The rotation static locus is a rotation locus in a state where the seedling transplanting machine 100 (running machine 1) is not moving forward.

In the present embodiment, in order to realize such an inverted triangular rotational static locus T, as shown in FIG. 5, when the first rotary case 81 points in the horizontal direction, the rotary support shaft of the second rotary case 82 When each of the relative rotation support central shafts 84 and 84 is located directly above the outer side of the radius of gyration R from 83 and the first rotary case 81 points in the vertical direction, the rotation of the second rotary case 82 located above. The relative rotation support center shaft 84 is located directly below the rotation radius R inside the support shaft 83, and the relative rotation support center is located directly below the rotation radius R outside the rotation support shaft 83 of the second rotary case 82 located below. A transmission mechanism for locating the shaft 84 is provided inside each of the second rotary cases 82 and 82.

By drawing the inverted triangular rotating static locus T in which the transplanting cup 50 does not protrude upward as shown in FIG. 8, the seedling taking-out claw 61 can be brought closer to the rotating static locus T, and eventually the seedlings can be brought closer to the rotating static locus T. It becomes easy to arrange the take-out claw 61 close to the transplanting cup 50, and the stability of seedling supply is improved. Further, since the transplant cup 50 is supported by each of the pair of second rotary cases 82 attached to both tips of the first rotary case 81 via the relative rotation support central shaft 84, the first rotary case By rotating 81 once, seedlings can be planted at two places along a single row, and high-speed seedling transplanting work can be realized. Therefore, according to the seedling transplanting machine 100, the stability of seedling supply can be improved while realizing the high-speed seedling transplanting work.

Moreover, since the length of the rotating static locus T having an inverted triangular shape is smaller in the vertical direction than the rotating static locus T having a shape protruding upward (see, for example, FIG. 9), for example, seedling supply The devices 2 can be arranged close to each other, which is useful for compactly configuring the machine. Further, since the change in height at the top dead center is small, the degree of freedom is higher with respect to the position where the plurality of transplant cups 50 are temporarily stopped than in the case where the upper part of the rotational static locus is arcuate.

The positions P1 and P2 shown in FIG. 8 indicate the positions when the rotation of the transplant cup 50 is temporarily stopped when the distance between the plants (planting interval) is widened, respectively. In order to avoid the situation where the transplant cups 50 are dragged close to the field scene, it is preferable to suspend the pair of transplant cups 50, 50 at positions P1 and P2 that are substantially the same height as each other. .. The seedling extraction claw 61 drops the pot seedlings from above the position P1 (or the position P2), so that the seedlings are supplied to the transplant cup 50. From the viewpoint of improving the stability of seedling supply and suspending the transplant cups 50 and 50 at a height appropriately away from the field scene, the rotational static locus T extends from both ends of the upper bottom extending horizontally. It is preferably an isosceles triangle with the same length of two sides, and more preferably an isosceles triangle.

When the pair of transplanting cups 50, 50 rotate while drawing an inverted triangular rotating static locus T, it is preferable to pause at or near the upper bottom extending horizontally in the rotating static locus T. .. By suspending the transplant cups 50, 50 at or near the upper bottom, which is the top dead center, the pair of transplant cups 50, 50 are suspended at an appropriate distance from the field scene, and the seedlings are supplied. Stability can be reliably improved. In this embodiment, an example is shown in which a pair of transplant cups 50, 50 are paused in the vicinity of the upper base (which is also in the vicinity of both ends of the upper bottom).

Further, in the present embodiment, when the pair of transplanting cups 50, 50 rotate while drawing an inverted triangular rotating static locus T, the pair of transplanting cups 50, 50 are below the upper base extending horizontally in the rotating static locus. It is paused. According to this configuration, it is convenient to suspend the pair of transplant cups 50, 50, which are 180 degrees out of phase with each other, in the vicinity of the upper bottom, which is the top dead center. Furthermore, in the present embodiment, when the pair of transplant cups 50 and 50 are temporarily stopped, each of the relative rotation support central shafts 84 is located directly above the rotation radius outside the rotation support shaft 83 of the second rotary case 82. Is located (see the state in which the first rotary case 81 in FIG. 5 is oriented in the horizontal direction).

In FIG. 3, the transplanting mechanism 5W located at the left end has the same configuration except that the transplanting mechanism 5W located at the right end is arranged symmetrically in a plan view, and thus the duplicate description will be omitted.

The present invention is applied to a transplantation mechanism in which a transplantation cup is supported in each of the second rotary cases attached to both tips of the first rotary case as described above, and the transplantation cup 50 is used as one. The configuration of the transplantation mechanism 5 having only one (that is, the transplantation mechanism 5S paired with the transplantation mechanism 5W) is not particularly limited. Further, the structure may not include the transplantation mechanism 5S having only one such transplantation cup 50.

In the present embodiment, an example in which the transmission mechanism in the first rotary case 81 is composed of only gears is shown, but the present invention is not limited to this, and a configuration including a sprocket and a chain wound around the sprocket may be included.

In the present embodiment, a double-row planting type seedling transplanting machine has been exemplified, but the present invention is not limited to this, and a single-row planting type seedling transplanting machine or a multi-row planting type seedling transplanting machine having three or more rows may be used.

In the present embodiment, an example of a riding type seedling transplanting machine is shown, but the present invention is not limited to this, and a walking type seedling transplanting machine may be used.

The present invention is not limited to the above-described embodiment, and various improvements and changes can be made without departing from the spirit of the present invention.

1 Traveling machine 2 Seedling supply device 3 Seedling planting device 4 Elevating mechanism 5 Transplant mechanism 6 Succession mechanism 50 Transplant cup 80 Rotation center shaft 81 First rotary case 82 Second rotary case 83 Rotation support shaft 84 Relative rotation support center shaft 100 seedling transplanter

Claims (5)

The central axis of rotation and
The first rotary case that rotates around the rotation center axis and
The rotary support shafts provided on the side surfaces of both tips in the rotational radial direction of the first rotary case, and
A pair of second rotary cases that rotate around the rotary support shaft, and
A pair of relative rotation support central shafts arranged at positions deviated from the rotation support shaft and rotatably provided with respect to the second rotary case.
A pair of transplant cups, which are supported by the relative rotation support central axis and whose posture is controlled so as to always face downward regardless of the rotation phase of the first rotary case, are provided.
A seedling transplanting machine in which the static rotation locus of the transplanting cup viewed from the axial direction of the center of rotation is an inverted triangle. When the first rotary case is oriented in the horizontal direction, each of the relative rotation support central axes is located above the rotation radius outside the rotation support shaft of the second rotary case, and the first rotary case is When pointing in the vertical direction, one of the pair of relative rotation support center shafts is located below the rotation radius inside the rotation support shaft of the second rotary case located above, and the second is located below. A claim that a transmission mechanism is provided inside each of the second rotary cases so that the other of the pair of relative rotation support central shafts is located below the rotation radius outside the rotary support shaft of the rotary case. The seedling transplanting machine according to 1. The first or second aspect of the present invention, wherein when the pair of transplant cups rotate in an inverted triangular rotating static locus, they pause at or near the upper base extending horizontally in the rotating static locus. Seedling transplanter. The first or second aspect of the present invention, wherein when the pair of transplant cups rotate in an inverted triangular rotating static locus, they pause below the upper base extending horizontally in the rotating static locus. Seedling transplanter. The seedling transplantation according to any one of claims 1 to 4, wherein the second rotary case rotates twice about the rotation support shaft while the first rotary case makes one rotation about the rotation center axis. Machine.

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