JP3227726B2 - Pot seedling transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a pot seedling transplanter using a pot seedling grown by a pot-type seedling incubator, and relates to a locus of a setting rod for planting a seedling on a seedling mounting table in a field scene. is there.

[0002]

The seedlings used in BACKGROUND ART rice transplanter, under the mat seedlings predetermined strain amount is set to a single mat, a plurality of pots upper exhibits lower wide side view trapezoidal shape narrowing with each other
There are pot seedlings in which the seedlings are planted in each pot after being aligned in a state where they are connected with each other. Usually, rice transplanter mat seedlings, Ri common Oh that is adapted to be shared to any seedlings, conventional transplanter machine, as shown in FIG. 12, mat when using matting seedlings Seedling aggregate 10
In order to be able to separate the seedlings of one to one plant well, the tip (locus P) of the implantation rod passes forward (in the seedling feed direction) when passing through the lower surface rather than the upper surface of the soil portion. On the other hand).

[0003]

However, in the conventional rice transplanter described above, when a pot seedling is used, as shown in FIG. 13, the trajectory P of the tip of the implanted rod is at the connecting portion 100b between the pot 100a and the pot 100a. Since they do not match, there is a problem that the seedlings are not properly separated, and the scraped seedlings are sandwiched in a poor posture by the implantation claws of the implantation rod and cannot be planted normally. Particularly in the case of seedlings with good rooting, the seedlings may not be completely separated as shown by the chain line in FIG. In addition, there is also a problem that the pot is broken by the implanted rod biting into the base.

[0004]

In order to solve the above problems, the present invention has the following arrangement. That is, the pot seedling transplanter according to the present invention uses a pot seedling in which a plurality of pots exhibiting a trapezoidal shape with a narrow upper portion and a wider lower portion in a side view are connected to each other at a lower portion, and seedlings are planted in each pot. In a pot seedling transplanter, the seedling table on which the seedlings are placed, and the tip moves up and down while drawing a curved trajectory,
A planting rod for separating the frontmost row of seedlings on the seedling mounting table and planting the same in a field scene, wherein the planting rods when the tip of the planting rod passes from the top to the bottom of the frontmost row of pots. The distance from the tip of the rod to the center of the upper surface of the pot is A, and the distance from the tip of the implanted rod to the center of the lower surface of the pot when the tip of the implanted rod passes through the lower surface of the front row pot from top to bottom. When the distance is B, the trajectory of the tip of the implanted rod is A <B.

[0005]

The distance from the tip of the implanted rod to the center of the upper surface of the pot when the tip of the implanted rod passes from the top to the bottom of the pot in the front row in a curved trajectory is denoted by A. When the distance from the tip of the implanted rod to the center of the lower surface of the pot when the tip of the implanted rod passes through the lower surface of the front row pot from top to bottom is B, the trajectory of the tip of the implanted rod is then, as it is a <B, the distal end portion of Uekomi杆moves along the contour of the front row of pots, across the connecting portion of the pot and the pot in a substantially vertical. For this reason, the separation of the seedlings is reliably performed, and the pot is not damaged.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment shown in the drawings will be described below. 1 to 9 show a pot seedling transplanter according to one embodiment of the present invention. In the pot seedling transplanter 1, a planting unit 4 is mounted on an elevating link device 3 provided at a rear portion of a power vehicle 2, and a fertilizer application device 5 is provided separately therefrom. It is configured as a rice transplanter. During the work, the link device 3 is moved up and down by the hydraulic cylinder 6 according to the unevenness of the field scene, and the planting unit 4 is maintained at a constant height from the field scene.

[0007] The planting part 4 is a central case 1 transmitted from a PTO shaft 7 of a traveling vehicle via a universal joint.
0, a total of three transmission case pipes 11, 11 protruding from both side surfaces of the central case, and a total of three branch cases 12, extending rearward from the central portion of the central case 10 and the end of the transmission frame pipes 11, 11. , And a seedling mounting table 14 is provided above the planted portion frame so as to be inclined so that the front side is higher, and one side of the rear side of each branch case 12,. A total of six sets of planting devices 15,... Are provided. In FIG. 3, 90, 9
Reference numeral 1 denotes a float as a leveling body for leveling a field scene, 92 denotes a field scene height detection rod attached to a center float 90, 93 denotes a hydraulic valve that controls the hydraulic cylinder 6, and the hydraulic valve is a field scene height. Switching is performed based on the vertical movement of the detection rod 92.

The seedling mounting table 14 includes a seedling mounting support frame 17 fixedly provided on each of the branch cases 12,... And a seedling mounting frame 18 provided from the upper part of the central case 10 toward the front upper side. It is slidably supported left and right by a rail 19 attached to the upper end. The upper surface of the seedling mounting table 14 is divided into seedling mounting sections 14a,... As many as the number of planting strips, and a belt-type seedling feeding apparatus 21,. Have been. Further, as shown in FIG. 4, adjacent to the lower end of the seedling mounting table 14, the seedling outlet 2 corresponding to the planting device 15,.
The seedling receiving frame 23 formed with 2,... Is provided integrally with the seedling mounting support frame 17. The seedling receiving frame 23 has a hook shape in a side view including a bottom plate portion 23a located substantially on the same plane as the bottom plate of the seedling mounting table 14 and a rising portion 23b rising upward from the rear end of the bottom plate portion. Is molded. Further, a pot holder 26 in which resilient wires are arranged in a comb shape at a seedling width interval is attached to the rear end of the seedling mounting table 14.

FIG. 5 is a cross-sectional view of the planting section frame developed and shown. The central case 10 is an upper case 10a,
It comprises a lower case 10b and a connecting portion 10c, and transmission frame pipes 11, 11 are attached to both sides of the lower case 10b. An input shaft 28 is supported on the front side of the lower case 10a in the front-rear direction, and the power transmitted to the input shaft is transmitted via bevel gears 29 and 30 to the lower case 10b.
Is transmitted to the planting device drive shaft 32 inserted through the transmission frame pipes 11, 11. At the rear end of the branch case 12, a planting device mounting shaft 33 is supported, and the sprockets 35,... Mounted on the planting device drive shaft 32 and the planting device mounting shafts 33,. Chains 37 are mounted on the sprockets 36. A fixed position clutch 38 is provided on the mounting portion of the sprocket 35, and when the work is stopped, the planting devices 15,... Stop operating at the fixed position.

A counter shaft 40 is supported by the connecting portion 10c, and a lead cam shaft 41 and a seedling feed shaft 42 are supported by the upper case 10a. A pair of eccentric circular gears 43, 44, and further transmitted from the counter shaft 40 to the lead cam shaft 41 via any one of four sets of seedling number switching gears 45 (1 to 4) and 46 (1 to 4). At the same time, a pair of eccentric circular gears 47 from the counter shaft 40 to the seedling feed shaft 42,
It is transmitted via 48. The lead cam shaft 41 is a shaft in which a spiral groove 50 is formed on the outer peripheral portion.
1 is slidably fitted around it. The engaging metal 52 is provided integrally with a lateral moving rod 53 parallel to the lead cam shaft 41, and mounting plates 55, 55 attached to both ends of the lateral moving rod are attached to the mounting plate 5 of the seedling mounting table 14.
6,56.

When the lead camshaft 41 rotates, the engaging metal 52 moves along the groove 50, thereby causing the seedling mounting table 1 to move.
4 are reciprocated left and right, and the seedlings in the front row located on the seedling receiving frame 23 are sequentially supplied to the seedling outlet 22. Seedling stand 14
Reaches the end of the left and right strokes, the seedling feed cam 57 attached to the seedling feed shaft 42 engages with the passive cam 58 and the seedling feeder 21 operates, so that the seedlings on the seedling mounting table are lowered by one row. Be transported. The seedling number switching gears 45 (1 to 4), 46 (1 to 4)
The combination of 4) is arbitrarily selected, and the lead camshaft 41 is selected.
By appropriately setting the rotation speed ratio of the seedlings, the number of seedlings to be taken per one step of the lateral movement of the seedling table can be switched to four stages.

Since the eccentric circular gears are used for the gears 43 and 44 that transmit from the planting device drive shaft 32 to the counter shaft 40, the lateral feed speed of the seedling mounting table periodically fluctuates. The timing is set such that the implanted rod 61 separates the seedling when the lateral feed speed is minimized. Further, since the eccentric circular gears for restoring the fluctuation of the rotational angular velocity are also used for the gears 47 and 48 transmitted from the counter shaft 40 to the seedling feed shaft 42, the seedling feed speed is constant. For this reason, seedling feeding is performed reliably. The rotational angular velocities of the respective shafts 32, 40, 41, 42 are as shown in FIG. The adjustment of the rotational angular velocity between the shafts and the adjustment of the timing may be performed using an unequal-diameter gear other than the eccentric circular gear.

7 to 9 are views showing the internal structure of the planting device. The planting device 15 includes a rotary case 60 provided integrally with the planting device mounting shaft 33 and a pair of planting rods 61 provided at both ends of the rotary case. In the rotary case 60, a sun gear 64 mounted on the planting device mounting shaft 33, counter gears 65 and 65 meshing with the sun gear, and a planetary gear 6 meshing with the counter gear are provided.
6 and 66, and a planting rod 61 is integrally attached to a planting rod mounting shaft 68 fitted to the planetary gear. The rotation of the implanting device mounting shaft 33 causes the entire rotary case 60 to rotate, and the implanting rods 61, 6.
1 performs a circumferential motion while maintaining a constant posture. The counter gear 65 and the planetary gear 66 are non-circular gears, and the moving speed of the implantation rod 61 is lower at the upper part of the circumferential locus and higher at the lower part.

A pair of planting claws 70 and 71 for holding the seedling supplied to the seedling take-out port 22 at the upper part of the locus and releasing it to the field at the lower part of the locus, A seedling pushing tool 72 is provided, which sometimes projects between the pair of implantation claws 70 and 71 and pushes the seedlings toward the field. A pair of implant nails,
It comprises a fixed claw 70 fixed to the implanted rod case and a movable claw 71 which opens and closes the fixed claw. The open / close shaft 74 to which the movable claw 71 is attached is provided with an open / close arm 77 having a cam follower 76 formed at a distal end thereof for engaging with an open / close cam 75 attached to the implantable rod attachment shaft 68. Opening / closing cam 75
By swinging the arm 77 to rotate the opening / closing shaft 74, the movable pawl 71 opens and closes intermittently. The opening / closing shaft 74 is positioned by an opening / closing timing adjusting bolt 79,
By turning the opening / closing timing adjustment bolt 79 to change the position of the opening / closing arm 77 with respect to the opening / closing cam 75, the opening / closing timing of the movable claw 71 can be adjusted. In the drawing, reference numeral 80 denotes an open / close arm return spring, and reference numerals 81 and 82 denote open / close arm position adjusting springs. Seedling extruder 7
2 is a seedling pushing shaft 84 urged downward by a spring 85
Attached to. The tip of an extruding arm 89 provided integrally with a cam follower 88 that engages with an extruding cam 87 attached to the implantation rod attachment shaft 68 is fixed to a seedling extruding shaft 84. By swinging the pushing arm 89 with the pushing cam 87, the seedling pushing tool 72 protrudes downward intermittently.

FIG. 3 shows the trajectory P of the tip of the implant rod 61 (the implant claws 70, 71). As illustrated, Uekomi杆61 performs vertical movement in a curve-like locus of the closed loop, sandwiched by separating the seedling supplied to the seedling outlet 22 at the top P ₁ point in the trajectory, the lower portion of this locus instill in the field was released in P ₂ points. FIG. 4 shows the rear end of the seedling mounting table 14 in an enlarged manner, and the distance from the center of the base when the distal end of the implantation rod 61 passes through the upper surface of the base 100a is A. If the distance from the center when passing through the lower surface is B, then A <B. The implantation rod 6 that has moved downward from above the seedling mounting table 14
1 moves along the rear surface of the base 100a of the seedling 100 (1) in the front row, and crosses the pot and the connecting portion 100b below the pot almost vertically. The seedling 100 (1) in the front row and the seedling 100 (2) adjacent thereto are separated at the connecting portion 100b, and the separated seedling 100 (1) is paired with a pair of implantation claws 70,7.
It is pinched by 1.

In the above embodiment, the structure of the seedling mounting table is the same as that of the conventional rice transplanter, and the trajectory of the implantation rod is changed so that the seedlings can be separated well. On the other hand, in the embodiment shown in FIG. 11, the pot holder 26 has a predetermined angle, the pot holder abuts on the front face of the pot 100a of the front row seedling, and the front of the pot is set to the seedling receiving frame. Plate part 23
It rises from a. The trajectory of the tip of the implantation rod 61 with respect to the seedling mounting table 14 is the same as that of the conventional rice transplanter shown in FIGS. 12 and 13, but the trajectory of the tip of the implantation rod with respect to the seedling 100 (1) in the front row. Satisfies A <B, and the seedlings are well separated as in the previous example.

[0017]

As described above, in the pot seedling transplanter according to the present invention, the tip of the implantation rod crosses the connecting portion between the pot and the pot almost vertically, so that the pot seedlings can be surely transferred one by one. Can be separated. Therefore, the seedlings can always be planted in a normal posture, and the pot is not damaged, so that the planting accuracy is improved.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter according to one embodiment of the present invention.

FIG. 2 is a plan view of the riding rice transplanter shown in FIG.

FIG. 3 is a side view of the planting section.

FIG. 4 is a side view of a main part of the planting section.

FIG. 5 is an expanded sectional view of the planting section frame.

FIG. 6 is a diagram showing a positional relationship between axes in a central frame.

FIG. 7 is a sectional view of the planting device.

8 is a view as viewed in the direction of arrows XX in FIG. 7;

9 is a view taken in the direction of arrows YY in FIG. 7;

FIG. 10 is a time chart of a rotational angular velocity.

FIG. 11 is a side view of a main part of a planting part according to another embodiment.

FIG. 12 is a side view of a main part of a planting part of a conventional rice transplanter, showing a case where a mat seedling is used.

FIG. 13 is a side view of a main part of a planting part of a conventional rice transplanter, showing a case where a pot seedling is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Riding fertilizer rice transplanter (pot seedling transplanter) 2 Powered vehicle 3 Link device 4 Planting part 14 Seedling stand 15 Planting device 23 Seedling receiving frame 61 Planting rod 70, 71 Planting nail 100 Seedling 100a Pot 100b Connecting part

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-59-143518 (JP, A) JP-A-62-208210 (JP, A) JP-A-4-108308 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) A01C 11/02

Claims (1)

(57) [Claims] 1. A pot seedling transplanter that uses a pot seedling in which a plurality of pots each having a trapezoidal shape having a narrow upper portion and a wide lower portion in a side view are connected to each other at a lower portion, and seedlings are planted in each pot. and seedling loading table to put the seedlings, ahead
An end rod moves up and down while drawing a curved trajectory, and a planting rod for separating the front row seedlings on the seedling mounting table and planting them in a field scene, the tip of the planting rod being the front row pot The distance from the tip of the implanted rod to the center of the upper surface of the pot when passing through the upper surface of the pot from top to bottom is A, and the tip of the implanted rod is the front row pot.
When the distance from the tip of the implanted rod to the center of the lower surface of the pot when passing through the lower surface of the pot from top to bottom is B,
A pot seedling transplanter, wherein the trajectory of the tip of the implantation rod satisfies A <B.