JP4340826B2 - Mobile seedling transplanter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile seedling transplanting machine in which seedlings of various crops placed in a large number of pots in a seedling tray are planted at appropriate intervals while traveling at an appropriate speed with respect to a field. is there.
[0002]
[Prior art]
Conventionally, this kind of seedling transplanting machine is generally a traveling machine body that travels with left and right traveling wheels, as disclosed in, for example, Japanese Patent Laid-Open Nos. 7-8029 and 9-28130. In addition, an engine as a power source, a seedling take-out supply mechanism for taking out a seedling one by one from each pot in a seedling tray mounted on the traveling machine body and supplying it to a transplanting mechanism described later, and a seedling from the seedling take-out supply mechanism A seedling planting mechanism for transplanting to a farm field, and the seedling planting mechanism of the seedling transplanting machine has a cup body vertically split to open from side to side from the seedling take-out and supply mechanism. When the seedling is received, the cup body moves downward so that the lower end of the cup body is inserted into the field, and then opens to the left and right to plant the seedling in the field.
[0003]
In this case, conventionally, since a single cup body is provided in the seedling planting mechanism and the single cup body is moved up and down, the seedling planting speed on the field is slow.
[0004]
Therefore, recently, the seedling planting mechanism is vertically divided so as to open to the left and right at each of the left and right ends of the rotary case. It has been proposed that a cup-type cup body is provided, and that both cup bodies are moved up and down by the rotation of the rotary case.
[0005]
[Problems to be solved by the invention]
However, when the seedling planting mechanism is configured as a rotary type as described above, both cup bodies are sandwiched between the drive shafts so that when one cup body is located at the uppermost part, it is located at the lowermost part of the other. When the seedling transplanter is moved over the heel in a state where the rotation of the rotary case is stopped, it is positioned at the lowermost part of the cup bodies. Since the cup body that comes into contact with the heel, there was a problem that the cup body was broken or damaged, or the synthetic resin film (so-called multi-film) covering the heel was broken frequently. .
[0006]
The present invention has a technical problem to solve this problem.
[0007]
[Means for Solving the Problems]
The present invention for achieving this technical problem, "the traveling machine body traveling on the field, and seedling taking out and Organization taking out seedlings one by one strain from each pot in seedling trays mounted thereto, from the seedling taking out mechanism A seedling planting mechanism for transplanting the seedlings to the field, the seedling tray is disposed behind the seedling removal mechanism, the seedling planting mechanism is disposed below the seedling removal mechanism , and the seedling planting A mechanism is provided on each of the left and right ends of a rotary case fixed to a drive shaft that rotates horizontally and horizontally, and a cup body vertically divided so as to open to the left and right is provided. in seedling transplanter comprising constituting the rotary vertically moving between said rotary case includes a first rotary case which is fixed to the drive shaft, at both ends of the outer surface of the first rotary case Consists of a rolling capable second rotary case which is arranged, the rotatably mounting the cup body to the second rotary case, the power transmission unit Previous hear rotary shaft, intermittently operating the power transmission And a fixed position stop means for stopping the rotation of the first rotary case at a position where both cup bodies are separated from both the seedling take-out mechanism and the field when the clutch mechanism is operated to cut off power transmission. When the fixed position stopping means is operated by driving the clutch mechanism, the two second cup bodies are adjacent to each other at a position near the rotation center of the first rotary case in a side view. and is configured to hold a posture of the rotary case, is that ".
[0008]
[Operation and effect of the invention]
By configuring in this way, when stopping the rotation of the rotary case in the seedling planting mechanism, this stop can be performed at a position where both cup bodies in the rotary case are away from both the seedling removal mechanism and the field, Since the cup body can be prevented from coming into contact with the cocoon when moving over the seedling transplanter, etc., the cup body is broken or damaged or the cocoon is covered when the cocoon is moved over. It is possible to reliably reduce the occurrence of a situation that breaks the synthetic resin film (so-called multifilm).
[0009]
Further, by adopting the configuration as described in claim 2, the fixed position stopping means can be incorporated in the clutch mechanism, and compared with the case where these are provided separately, the size and weight can be reduced. Has the advantage of being able to.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment embodying the present invention will be described with reference to FIGS.
[0011]
In this figure, reference numeral 1 denotes a traveling machine body. A main frame 3 in the traveling machine body 1 is equipped with an engine 2 and a transmission case 4, and a pair of arms 5 extending rearward from the left and right sides of the main frame 3. Front wheels 6 are respectively mounted, and a rear wheel 8 is mounted on both ends of a drive horizontal shaft case (not shown) extending laterally on the rear side of the main frame 3 via a transmission case 7. The power from 4 is transmitted to the rear wheel 8, and the traveling machine body 1 travels.
[0012]
The front wheels 6 and the rear wheels 8 are configured to be swingable up and down via a swing mechanism 9 provided on the main frame 3 and a swing hydraulic cylinder (not shown). The height of the traveling machine body 1 can be changed (the height to the ground can be adjusted).
[0013]
A handle 11 extending rearward is provided at the upper end of the chassis frame 10 provided so as to extend to the rear part of the traveling machine body 3, and the seedling mount 12 is disposed so as to be reciprocally movable left and right with respect to the chassis frame 10. A supply device 13 is provided.
[0014]
This seedling stage 12 is configured to reciprocate left and right via a lateral feed mechanism which will be described later, and the seedling stage 12 is provided with a seedling pot portion 14a in a matrix in front, rear, left and right in the traveling direction in plan view. A seedling tray 14 is placed and the seedling pot portion 14a is intermittently vertically moved one pitch at a time in the forward direction of the traveling machine body 1 at the end of the lateral feed by a vertical feed mechanism (described later) provided on the seedling platform 12. It is configured to send.
[0015]
The rotary seedling planting mechanism 15 is provided on each of the left and right side surfaces of the transmission case 4 between the left and right rear wheels 8 via a planting transmission case 16 extending to the rear side of the traveling body 1 in the traveling direction. It has been.
[0016]
The both seedling planting mechanism 15 is composed of a cup body 17 and the like for receiving the pot seedling N to be transplanted in the ascending position and transplanting the pot seedling N to the field in the descending position. A pair of left and right seedling extraction mechanisms 18 including a seedling extraction claw 19 and the like for taking out the pot seedling N in the seedling pot portion 14a of the seedling tray 14 in the seedling supply device 13 and transferring and supplying it to the cup body 17 are provided. Power is transmitted from the transmission case 4 to the seedling supply device 13 and the seedling extraction mechanism 18 via a transmission path through a chain wound around a chain sprocket.
[0017]
Further, behind the seedling planting mechanism 15, a pair of pressure-reducing wheels 20 that suppress the heel surface M are disposed.
[0018]
Next, the seedling supply device 13 will be described with reference to FIGS. 2, 5, and 6. As shown in FIG. 2, the seedling stage 12 has a substantially rectangular frame frame 20 in a plan view, and a vertical feed case including a vertical feed transmission section as a vertical feed mechanism disposed on one side of the frame frame 20. 21, a transport chain 22 for vertically feeding the seedling tray 14, large and small chain sprockets 23, 24, a guide frame 25 arranged so that the empty seedling tray 22 is guided toward the rear end of the handle 11, etc. Consists of.
[0019]
A front guide roller 26 mounted on the frame frame 20 of the seedling platform 12 is inserted into a left and right longitudinal U-shaped guide rail 27 fixed to the chassis frame 10, while the rear of the frame frame 20 faces downward. The seedling table 12 is mounted so as to be movable left and right by placing U-shaped guide rails 28 on sliding guide pieces 29 fixed to the left and right sides of the chassis frame 11.
[0020]
The seedling tray 14 is made of a flexible soft synthetic resin material, and can be bent along the circumference of the large-diameter chain sprocket 23 when mounted on the transfer chain 22 and transferred. The pair of left and right transport chains 22 are rotatably mounted on a large-diameter chain sprocket 23 mounted on a longitudinal feed drive shaft 30 driven via a power transmission system in a longitudinal feed case 21 and a frame frame 20. It is wound around a small-diameter chain sprocket 24 in the driven shaft 31. The pair of left and right conveying chain 22 is transversely of the engaging pin 32 at an appropriate pitch P 2 is projected, seedling pot portion 14a engaging pin 32 of the left and right are arranged in the transport back and forth direction in the seedling tray 14 6 is engaged with the lower surface side of the connecting portion of FIG. 6 and reliably conveyed in the direction of arrow C in FIG.
[0021]
A reciprocating feed screw portion is formed on the transverse feed shaft 33 projecting from the transmission case in the transverse feed mechanism, and a feed block with a ship-type key that is screwed to the reciprocating feed screw portion and a frame on the seedling platform 12. An engagement piece such as an engagement bolt is connected, and the seedling stage 12 is configured to reciprocate left and right in the lateral width direction of the seedling tray 14.
[0022]
On the other hand, the vertical feed shaft 34 protruding from the vertical feed case 21 is intermittently rotated at the lateral feed end position of the seedling stage 12 and is provided at a distance from the vertical feed shaft 34 by the lateral feed distance. The kick pawl (not shown) kicks and rotates a driven cam (not shown) provided in the vertical feed case 21 to intermittently rotate the vertical feed drive shaft 34 via a transmission portion in the vertical feed case 21. it is dynamic, and constitutes as seedling pot portion 14a is intermittently longitudinal feed by a predetermined pitch P 2.
[0023]
Next, the structure of the seedling extraction mechanism 18 having the seedling extraction claws 19 will be described with reference to FIGS. In the two-row planting device, two seedling take-out mechanisms 18 are arranged on the left and right with respect to the traveling direction of the traveling machine body 1 at appropriate distances (for example, the stripe interval). The pot seedling N is taken out from the inside of the part 14a, and the pot seedling N is dropped almost directly above the cup body 17 at the raised position so that the seedling can be received by the cup body 17. It is.
[0024]
That is, the seedling extraction claws 19 are a pair of two, and move as shown by a reference numeral 36 in FIG. 6 by a mechanism 35 that operates by power transmission from the transmission case 4. The pot seedling N is gripped by entering and closing in the pot portion 14a, and then retracted from the pot portion 14a and moved almost right above the cup body 17, and then opened to open the pot seedling N. The operation of dropping into the cup body 17 is performed.
[0025]
Next, the structure of the rotary seedling planting mechanism 15 will be described with reference to FIGS. 3, 4, and 7 to 10. The base end of the transmission case 16 is fitted and pivotally attached to a PTO shaft 37 as an output shaft protruding from the side surface of the transmission case 4, and a drive shaft 38 is pivotally supported at the distal end of the transmission case 16. Power is transmitted to the shaft 38 from the PTO shaft 37 by a chain 39 in the transmission case 16, and both ends of the drive shaft 38 protrude from the left and right side surfaces of the transmission case 16, and the seedlings are planted on each of both ends thereof. The mechanism 15 is attached.
[0026]
The seedling planting mechanism 15 includes a first rotary case 40 disposed on the outer surface of the transmission case 19 and second rotary cases 41 disposed on both ends of the outer surface of the first rotary cases 37. The cup body 17 is mounted on each of the second rotary cases 41.
[0027]
The above configuration will be described in more detail. The drive shaft 38 is protruded horizontally in the horizontal direction, and the inner cylinder 42 fitted so as to rotate integrally with the drive shaft 38 is fixed to the outer surface of the first rotary case 40. The outer cylinder 44 to which the first solar sprocket 43 arranged concentrically with the drive shaft 38 is fitted so as to be rotatable with respect to the outer periphery of the inner cylinder 42. In the first rotary case 40, rotation support shafts 45 are rotatably provided at the same rotational radius position at both ends in the longitudinal direction. The distal end portion of each rotation support shaft 45 protrudes horizontally from the side surface of the first rotary case 40, and the inner tube 46 fitted so as to rotate integrally with each rotation support shaft 45 is attached to the second rotary case 41. While fixed to the outer surface, the chain 48 is wound around the sprocket 48 and the first solar chain sprocket 43 which are respectively fixed to the rotary support shafts 45 in the first rotary case 40.
[0028]
Each outer cylinder 49 fitted so as to be rotatable relative to the inner cylinder 46 in each rotation support shaft 45 is fixed to the outer surface of the first rotary case 40, and each second In the rotary case 41, a first intermediate gear 51 that meshes with the second sun gear 50 that rotates integrally with the outer cylinder 49, a second intermediate gear 52 that rotates integrally with the second sun gear 50, and a driven gear that meshes with the first intermediate gear 51. A relative rotation support center shaft 54 to which 53 is fixed is rotatably supported.
[0029]
The relative rotation support center shaft 54 that is rotatably supported in each of the second rotary cases 41 is disposed at a position displaced with respect to the rotation support shaft 45 as will be described later. The cup body 17 is attached to the central shaft 54. The cup body 17 is composed of a pair of cup body pieces 17a and 17b obtained by halving a substantially conical shape that squeezes downward in the forward and backward directions of the traveling machine body.
[0030]
A cam body 55 is fixed to the outer periphery of the relative rotation support center shaft 54 of each second rotary case 41 so as to rotate integrally with the second rotary case 41, and Cup support means 56 for rotatably supporting the rotation support shafts 57a and 57b fixed to the outer surfaces of the upper end portions of the pair of front and rear cup body pieces 17a and 17b in the cup body 17 is provided at the distal end portion. Secure with bolts 58.
[0031]
As a link mechanism for opening and closing the cup body pieces 17a and 17b in the cup body 17, a pair of front and rear cylindrical bearing portions 60 in the cup support means 56 are provided at the base end portions of the rotation support shafts 57a and 57b. The L-shaped swing arm 61 is fixed to the middle part of each of the rotation support shafts 57a and 57b, and the roller 62 provided on one swing arm 61 is fixed to the other swing arm. It is fitted into a horizontally long guide groove 64 formed in 61 so as to be laterally movable. Further, the lower end sides of the swing arms 61 are connected by a tension spring 65, and are always urged so that the lower end sides of the pair of front and rear cup body pieces 17a and 17b are closed.
[0032]
Further, the upper end of the follower 66 that protrudes upward from the swing arm 61 to which the roller 62 is attached and whose protruding length can be adjusted by a nut portion or the like is formed on the outer peripheral cam surface 55a of the cam body 55. Keep in contact. In a portion of the outer peripheral cam surface 55a where the distance from the axis of the relative rotation support center shaft 54 is large, the follower 66 is pushed downward, and one of the swing arms 61 is rotated. The other swinging arm 61 is also rotated through the guide groove 64, and the lower ends of both cup body pieces 17a and 17b to which they are attached against the spring force of the tension spring 65 are opened. At the position of the outer peripheral cam surface 55a where the distance from the axis of the relative rotation support center shaft 54 is short, the two swinging arms 61 are moved at the lower ends of both cup body pieces 17a, 17b by the spring force of the tension spring 65. Is pivotally held in the closing direction.
[0033]
In the seedling planting mechanism 15 having this configuration, when the first rotary case 40 is rotated in the direction of arrow A via the drive shaft 38, the rotation support shafts 45 at both ends of the first rotary case 40 revolve. Since the chain 48 is wound around the sprocket 47 and the first solar sprocket 43 in the both rotation support shafts 45, the chain 48 rotates and each sprocket 47 also rotates.
[0034]
Since it is fixed to the rotary shaft 45 of the sprocket 47 is attached to the second rotary case 41, which are integrally rotated. That is, while the first rotary case 40 rotates, the second rotary case 41 rotates (rotates) in the opposite direction.
[0035]
In this case, when the reduction ratio between the first solar sprocket 43 and the sprocket 47 is 2 (acceleration), when the first rotary case 40 is oriented in the vertical direction, the vertical direction relative to the first rotary case 40 is When each of the relative rotation support center shafts 54 is positioned at the vertical position outside the rotation radius of the rotation support shafts 42 of each second rotary case 41 and the first rotary case 40 is oriented in a substantially horizontal direction. The posture of the second rotary case 41 changes so that the relative rotation support center shafts 54 are positioned on the inner diameter side of the rotation radius from the rotation support shaft 45 of the second rotary cases 41 with respect to the first rotary case 40. To do. In other words, the second rotary case 41 rotates twice for one rotation of the first rotary case 40.
[0036]
Then, by setting the reduction ratio from the second sun gear 50 in each second rotary case 41 to the driven gear 53 in each relative rotation support center shaft 54 to 1/2, the relative rotation support center shaft The posture of the cup body 17 attached to 54 is always controlled so that the lower end thereof is vertical, the turning locus of the second rotary case 41 with respect to the first rotary case 40, and each second rotary case 41. In relation to the change of the moving position of the relative rotation support center shaft 54 in the above, each cup body 17 and thus each relative rotation support center shaft 54 is long in the vertical direction, and is a short elliptical locus in front and rear in the traveling direction of the traveling machine body. (K) can be drawn.
[0037]
The shape of the outer peripheral cam surface 55a of the cam body 55 is such that the longitudinal direction of the first rotary case 40 (the side on which the second rotary case 41 is attached) is oriented in the vertical direction in a substantially vertical shape, and is positioned at the lower position. Immediately after the lower end portion of the cup body 17 in the second rotary case 41 enters the flange surface M, the lower end sides of both cup body pieces 17a and 17b open (the pot seedling N in the cup body 17 is thereby After the lower end portion of the cup body 17 is extracted from the heel surface M, it is formed so as to be able to perform an opening / closing operation of closing above the upper end of the transplanted seedling. It is.
[0038]
Also, by providing the seedling planting mechanism 15 having the above-described configuration on both the left and right sides with one transmission case 16 in plan view, seedlings can be transplanted simultaneously into two strips, and at two locations at regular intervals along one strip It can be transplanted, and high-speed seedling transplanting work can be realized.
[0039]
A clutch mechanism 70 for intermittently operating the transmission of power to the both seedling planting mechanism 15 in the portion in the mission case 4 of the PTO shaft 37 that is a power transmission unit to the both seedling planting mechanism 15, Fixed position stopping means for stopping the rotation of the rotary case 40 at a position where both the cup bodies 17 are separated from both the seedling taking-out mechanism 18 and the hook surface M when the clutch mechanism 70 is operated to cut off the power transmission. Is provided.
[0040]
7, 11 and 12 show an embodiment in which a fixed position stop means is integrally incorporated in the clutch mechanism 70. FIG.
[0041]
The clutch mechanism 70 includes a rotating body 71 that is rotatably fitted to the PTO shaft 37, and a clutch body 72 that is slidably fitted to the PTO shaft 37 so as to rotate integrally with the PTO shaft 37 by spline engagement or the like. And a spring 73 that urges the clutch body 72 to always mesh with the rotating body 71, and transmits the power from the engine 2 to the rotating body 71 via a chain 78. This is rotationally driven by transmitting it from the body 71 to the both seedling planting mechanism 15 through the clutch body 72 meshed with the body 71 and the PTO shaft 37 with which the clutch body 72 is spline-engaged.
[0042]
On the other hand, the clutch body 72 is moved backward against the spring 73 away from the rotating body 71 to release the meshing with the rotating body 71, thereby interrupting the power transmission to the seedling planting mechanism 15. To stop its rotation.
[0043]
In this case, a spiral inclined surface 74 is provided on the outer periphery of the clutch body 72, and the roller 76 provided on the operation shaft 75 is rotated on the spiral inclined surface 74 by rotating the operation shaft 75. By engaging, the clutch body 72 moves backward away from the rotating body 71 against the spring 73 to interrupt power transmission.
[0044]
On the other hand, a fixed-position stop surface 77 is arranged so that the roller 76 contacts the end of the spiral inclined surface 74 when the clutch body 72 moves backward to a position where the engagement with the rotating body 71 is completely disengaged. The rotation stop position of the both seedling planting mechanism 15 is stopped by the contact of the roller 76 with the fixed position stop surface 77, and the rotation stop position by the fixed position stop surface 77 is set to the both seedlings. Each cup body 17 in the planting mechanism 15 is set at a position away from both the seedling taking-out mechanism 18 and the heel surface M, as indicated by solid lines in FIGS.
[0045]
In this configuration, when the operating shaft 75 is rotated so that the roller 76 provided on the operating shaft 75 contacts the spiral inclined surface 74 of the clutch body 72, the clutch body 72 has the roller 76 on the inclined surface 74. , It moves backward away from the rotating body 71 against the spring 73 and disengages from the rotating body 71, so that power transmission to the both seedling planting mechanisms 15 is cut off, and the clutch body 72 is cut off. Is further rotated by inertia, and the fixed position stop surface 77 at the end of the spiral inclined surface 74 comes into contact with the roller 76, so that the rotation of the clutch body 72 thereafter is stopped.
[0046]
Thus, the both seedling planting mechanism 15 stops the rotation of the both seedling planting mechanism 15 because each cup body 17 stops at a position away from both the seedling take-out mechanism 18 and the heel surface M. In this state, the cup body 17 can be reliably prevented from coming into contact with the heel surface M when moving over the heel.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a seedling transplanter.
FIG. 2 is a schematic plan view of a seedling transplanter.
FIG. 3 is a schematic side view showing a main part of the seedling transplanting mechanism.
FIG. 4 is a schematic plan view showing a main part of the seedling transplanter.
FIG. 5 is a side view showing a seedling supply device and a seedling removal mechanism in the seedling transplanter.
6 is an enlarged view of a main part of FIG.
FIG. 7 is a cross-sectional view showing a seedling planting mechanism in the seedling transplanting machine.
8 is an enlarged side view taken along the line VIII-VIII in FIG. 7;
9 is an enlarged sectional view taken along line IX-IX in FIG.
FIGS. 10A and 10B are diagrams showing opening and closing of the cup body in the seedling planting mechanism, where FIG. 10A shows a closed state and FIG. 10B shows an opened state.
11 is an enlarged sectional view taken along line XI-XI in FIG.
FIG. 12 is a perspective view showing a main part of the clutch body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Traveling machine body 4 Mission case 14 Seedling tray 18 Seedling removal mechanism 15 Seedling planting mechanism 38 Drive shaft 40 Rotary case 17 Cup body 70 Clutch mechanism 77 Fixed position stop surface

Claims (1)

The traveling machine body traveling on the field, and seedling taking out and Organization taking out seedlings one by one strain from each pot in seedling trays mounted thereto, the seedling planting mechanism for transplanting seedlings from the seedling taking out mechanism relative field The seedling tray is disposed behind the seedling removal mechanism, the seedling planting mechanism is disposed below the seedling removal mechanism, and the seedling planting mechanism is fixed to a drive shaft that rotates horizontally and horizontally. Each of the left and right ends of the rotary case is provided with a cup body vertically divided so as to open to the left and right, and both cup bodies are configured as a rotary type that moves up and down between the seedling take-out mechanism and the field. In the transplanter,
The rotary case includes a first rotary case fixed to the drive shaft and a second rotary case rotatably disposed at both ends of the outer surface of the first rotary case. A cup body is mounted rotatably,
Before the power transmission unit to hear rotary shaft, and a clutch mechanism for intermittently operating the power transmission, the two cup bodies the seedling rotation of said first rotary case when operating the clutch mechanism in the power transmission interrupted A fixed position stop means for stopping at a position away from both the take-out mechanism and the field ,
When the fixed position stop means is operated by driving the clutch mechanism, the two second rotary cases are in a state where the cup bodies are adjacent to each other at a position near the rotation center of the first rotary case in a side view. Configured to hold the posture of the
Mobile seedling transplanter.

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