JPH07114573B2 - Seedling transplanter - Google Patents

Description

TECHNICAL FIELD The present invention relates to a seedling transplanter for planting seedlings such as rush seedlings and cedar seedlings in a field.

[Prior Art] In order to ensure the transplanting work of seedlings such as grass, a needle-like feed claw that performs a reciprocating motion that draws a predetermined trajectory is provided, and the tip of this feed claw is placed on the seedling supply table. There is a seedling transplanter that forcibly pulls the massive seedlings that have been pulled toward the scraping opening side of the planting nail.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional seedling transplanter, when the feeding claw pulls the seedling to the scraping mouth side and then returns to the original position, the seedling may be lifted, and the missing seedling There was a problem that planting defects such as the above occurred.

[Means for Solving Problems] In order to solve the above problems, the present invention has the following configuration. That is, the seedling transplanter according to the present invention is a seedling transplanter equipped with a feed claw that draws a crop seedling placed on the seedling supply table to a seedling scraping opening, wherein the feed claw is on the seedling supply table. The plunging movement to enter the crop seedling from above and the pulling movement to pull the crop seedling toward the mouth side,
Further, it is characterized in that an operation mechanism is provided for starting the returning operation of the pulling movement at the same time as or earlier than the returning operation of the plunging movement.

[Operation] The feed claw performs the plunging movement and the pulling movement, and the return of the pulling movement is started at the same time as the start of the returning movement of the plunging movement, or earlier than that. Since it moves upward while it is detached from the seedling,
Do not lift seedlings.

[Examples] Examples described in the drawings will be described below.

The rush transplanter 1 is used by being attached to the link device 4 of the power farming machine 2, towed the field by the traveling of the power farming machine 2, and appropriately moved up and down by a hydraulic device provided in the power farming machine according to the height of the field scene. The planting depth is always kept constant.

The rush transplanter 1 has a transmission case 6, a branch case 7, ...
Is provided, and the seedling separating devices 10, ... And the planting devices 11 ,.
Above both of these devices, there is provided a seedling supply table 13 formed in an arc shape with its upper part located in the front. Seedling supply table 13
The lower part is attached to the frame 15 provided between the left and right arms 14, 14 of the lateral movement device (not shown) incorporated in the transmission case 6, and the upper part projects upward from the front end part of the branch case. Rails 17 installed horizontally on the support bars 16 and 16 installed
The upper part is slidably supported by. Further, below the transmission case 6 and the branch cases 7, ..., A center float 22 and a pair of left and right side floats 23, 23, which slide on the field scene and level the ground, are provided. These floats 22 and 23 are
The middle part is pivotally attached to the branch case 7 by a pin P, and the front part is suspended from the transmission case 6 by the expansion / contraction link 24. A hydraulic valve 26 for detecting the vertical position is provided between the front part of the center float 22 and the transmission case 6, and when the center float 22 moves upward and presses the spool of this hydraulic valve 26, the hydraulic pressure for raising and lowering is provided. The link device 4 is raised by controlling the valve, and conversely, when the center float 22 is rotated downward, the link device 4 is lowered.

The seedling supply table 13 is vertically divided by the side walls 31, ... Standing on the bottom plate 30, into the seedling tanks 32 ,.
Then, for each seedling tank, a seedling pushing device 33, ... For pushing down the seedling in the seedling tank downward is provided. In the seedling pushing device 33, a common pushing shaft 35 is horizontally supported at the center position of an arc formed by the seedling supply table 13, and a pushing arm having a pushing member 36 attached to the tip of the pushing shaft 33. As many as 37 seedling tanks are installed. The push-down arm 37 is biased downward by a spring 38.

The lower part of the seedling supply table 13 is formed as shown in FIG. That is, a front plate 41 having a notch-shaped scraping port 40 formed corresponding to each seedling tank 32 is provided adjacent to the lower end of the bottom plate 30 and fixed to the branch case.
Seedling support belts 44 are stretched by rollers 43, 43 on both sides of the scraping opening 40 of the front plate 41. Since the seedling support belt 44 is fixed to the side wall 31, the seedling support belt 44 rotates around the rollers 43, 43 in accordance with the lateral movement of the seedling supply table 13.

The seedling feeding device 10 is shown in FIGS. 3 and 4. A double shaft composed of an inner shaft 50 and an outer shaft 51, to which respective cams are attached and which are rotatably fitted to each other, is supported by the branch case 7. A cam (A) is attached to a cam shaft 55 which is driven by the inner shaft 50 through gears 53 and 54, and the cam (A) is engaged with the cam (B) of the outer shaft 51. . A swing case 57 is integrally provided at an end portion of the outer shaft 51, and an engaging protrusion 58a of a push rod 58 slidably fitted in the swing case is provided with a cam (C) of the inner shaft 50. ) Is engaged. The push rod 58 is constantly urged toward the cam (C) by a push spring 59 which is loosely fitted inside. Rocking case
Support plates 61, 61 are fixedly provided at the tip of 57, and a mounting base 63 having a pair of needle-like feed claws 62, 62 mounted thereon is rotatably supported. Further, the push rod 58 has a pressing convex portion 58b formed at the end opposite to the engaging convex portion 58a, and the mounting base 63 is rotated by a lever 65 that is vertically driven by the pressing convex portion 58b.

The cam (A) and the cam (B) form a plunge actuating mechanism, and are formed as shown in the drawing, and the cam (B) is biased by the cam spring 67 in the clockwise direction in FIG. , When the cam (A) rotates in a predetermined direction, the lever portion B ₁ of the cam (B) has a step portion of the cam (A).
It is pushed down by A ₁ and rapidly rotates counterclockwise, and gradually rotates clockwise and returns to its original position. Therefore, the rocking case 57 rocks to the left and right, and the feed claws 62, 62 indirectly attached to the rocking case 57 plunge at high speed in the direction of the seedling supply table 13 (direction of arrow X) and at low speed. The plunge motion is repeated by repeating the restoration operation of returning with. Further, the cam (C) constitutes a pulling operation mechanism, and is provided with large and small circular arc portions C ₁ and C ₂ , so that the push rod 58 moves up and down while resting stationary. For this reason, the feed claws 62, 62 perform a pulling motion in which the tip ends move along the seedling supply table 13 from the upper side to the lower side (the scraping mouth side) (in the arrow Y direction) and then return in the opposite direction. To do. Due to the combined movement in which the plunging movement by the plunging movement mechanism and the pulling movement by the pulling movement mechanism are combined, the tip of the feed claw draws the locus shown by the alternate long and short dash line in FIG. As you can see, the feed pawl 62
Plunges into the seedlings, pulls the seedlings toward the scraping opening 40 side, and then returns to the upper side and the upper side again.
The shape and phase of each cam are set so that the movement by the pulling operation mechanism starts at the same time as or slightly earlier than the movement by the plunging operation mechanism.

The planting device 11 includes a planting rod 70 that is driven in synchronization with the seedling feeding device 10, and the planting rod 70 is adapted to intermittently perform a roughly vertical movement by the action of a link mechanism. There is. As shown in FIG. 5, the tip of the planting claw 71 of the planting rod 70 is divided and slightly bent up and down, and its tip end is sharply formed. Then, on the back surface side of the planting claw 71, a square rod-shaped planting fork 73 projecting into the space between the planting claws,
A loop-shaped seedling holding claw 74 made of an elastic material such as a piano wire is provided. Further, as shown in FIG. 6, a U-shaped receiving claw 76 having a plurality of sharp chevron-shaped claws 76a is provided at a position below the scraping port 40, and the underground stem part of the scraped part is provided. It is designed to cut in.

The seedlings placed on each seedling tank 32 of the seedling supply table 13 are sequentially pushed down by the seedling pushing device 33, and are fed to the scraping opening 40 by lateral movement of the seedling tank 32. In synchronism with the lateral movement of the seedling tank, the seedling feeding device 10 performs the combined movement. That is, the feed claws 62, 62 enter the seedling located directly above the scraping port 40 from above and move downward in that state to forcibly transfer the seedling to the position of the scraping port 40. After the transfer, the feed claws 62, 62 return to their original positions, but first the return movement of the pulling motion is started, and the return movement of the plunging motion is started after the feed claw is separated from the seedling. Separated seedlings do not lift.

When the seedlings are supplied to the scraping port 40, the receiving claws 76 support them and the planting rods 71 enter to divide the seedlings into a predetermined size. The separated seedlings are held by the planting claw 71 and the seedling holding claw 74, and are carried to the soil by the lowering of the planting rod 70 to be planted. When the planting rod 70 returns, the planting fork 73 acts to separate the seedlings.

[Effects of the Invention] As is clear from the above description, in the seedling transplanting machine according to the present invention, the return operation of the pulling operation of the feed claws starts at the same time as or before the start of the return operation of the rush operation. Therefore, it becomes possible to reliably supply the scraping port for the seedlings and prevent the seedlings from being lifted up, which is suitable as a seedling separating device for transplanters such as rush.

[Brief description of drawings]

FIG. 1 is a side view showing a usage state of a grass transplanter to which the present invention is applied, FIG. 2 is an explanatory view of a lower end portion of a seedling supply stand, and FIG. 1 (a) is a side view, (b) is a view from the arrow S in (a), (c) is a view from the same arrow T, FIG. 3 is a side view of the seedling separating device, FIG. 4 is a cross-sectional view thereof, and FIG. FIG. 6 is a perspective view of the receiving claw. 1 ...... grass transplanter, 2 …… power farming machine, 10 …… seedling feeding device, 11 …… planting device, 13 …… seedling supply table, 32 …… seedling tank, 40 …… scraping port, 62 …… feeding Nails, (A), (B),
(C) …… Cam.

Claims (1)

[Claims] 1. A seedling transplanter equipped with a feed claw that draws a crop seedling placed on a seedling supply table to a seedling scraping opening.
The feed claw is caused to perform a plunging motion to enter the crop seedling on the seedling supply table from above and a pulling motion to pull the crop seedling toward the scraping mouth side, and the returning motion of the pulling motion is the restoration of the plunging motion. A seedling transplanter characterized by being provided with an actuating mechanism that is started at the same time as or earlier than the operation.