JPS6345170B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for transferring seedlings from a traveling vehicle body of a rice transplanter to a seedling stand of a seedling planting device.
The seedling planting device can be rolled freely relative to the traveling vehicle body, so that the seedling planting posture by the seedling device can be made uniform on the left and right sides, and a spare seedling stand that can be freely raised and lowered between the traveling vehicle body and the seedling planting device is installed. In addition to being configured so that both sides can be rolled freely, the spare seedling stand can be rolled and locked against the traveling vehicle body, and the load of the preliminary seedling stand is applied to the traveling vehicle body side to stabilize the seedling planting device except during seedling work. This is how it was done.

An embodiment in which the present invention is applied to a riding-type 6-row rice transplanter will be described below. In the figure, 1 indicates a traveling vehicle body, and the traveling vehicle body 1 is attached to a vehicle body frame 2 and its front part. 2 wheels (not shown) and 2 rear wheels 4 attached to the rear via axle cases 3, 3
A control seat 5 is provided on the upper surface of the vehicle body frame 2, and the vehicle moves forward by an engine (not shown) mounted on the vehicle body frame.

Reference numeral 6 indicates a seedling planting device located at the rear of the traveling vehicle body 1, and the seedling planting device 6 includes a transmission case 7 and 3 integrally extending rearward from the transmission case 7 at appropriate intervals in the lateral direction. Two planting cases 8, 8,
8. Floats 9, 9 attached to the lower surface of each planting case 8, 8, 8 so that the front end can freely move up and down.
9 and a seedling stand 10 whose upper end is inclined so as to approach the traveling vehicle body 1, and each planting case 8, 8, 8
On both the left and right sides of the seedling table 10, there are vertically swinging type seedlings which are divided into individual seedlings from the seedling pine on the seedling stand 10 and planted in the field area 11 on both sides of each float 9, 9, 9. A planting mechanism 12 is provided, and a seedling stand 10 is provided.
The lower end fits into the guide rail 13 for taking out seedlings attached to the upper surface of the transmission case 7, while the trochanter is attached to the support arm 15 which is erected from the transmission case 7 to the rail 14 provided halfway on the back surface. 16 is fitted and configured to reciprocate in the left and right lateral directions.

The hitch 17 attached to the rear end of the traveling vehicle body 1 has a pair of upper and lower links and a pair of left and right links 18 of equal length.
19 is pivoted to pins 20 and 21 at its base end to constitute a parallel link mechanism 22 for raising and lowering the seedling planting device, and the tips of the equal length links 18 and 19 in the parallel link mechanism 22 are connected to the seedling planting device 6. Pins 24 and 25 are pivotally connected to a connecting hitch 23 at the same interval as the vertical spacing of the proximal pivot pins 20 and 21, and a hollow shaft 26 is integrally provided on the connecting hitch 23 to protrude rearward substantially horizontally. By fitting this hollow shaft 26 into the front end of the transmission case 7 of the seedling planting device 6 via the ball bearing 27, the seedling planting device 6 is connected to the traveling vehicle body 1.
The hollow shaft 2
A power transmission shaft 28 to various driving parts in the seedling planting device 6 is provided in the seedling planting device 6, and power is transmitted to this from a PTO shaft 29 protruding from the rear end of the traveling vehicle body 1 via a telescopic and bendable shaft 30. do. Further, a hydraulic cylinder 31 for raising and lowering the seedling planting device is provided between one of the links 18 in the parallel link mechanism 22 and the vehicle body frame 2.

Reference numeral 32 denotes a support bracket for the preliminary seedling stand, and the support bracket 32 has a boss portion 32' at the lower end thereof connected to the hollow shaft 26 between the connecting hitch 23 and the transmission case 7, and is rotatable via a ball bearing 33. By being fitted into the vehicle body 1, it is configured to roll separately from the seedling planting device 6 on the same axis as the rolling center axis of the seedling planting device 6 relative to the traveling vehicle body.

At the upper end of this support bracket 32, pins 36, 37 are pivotally connected to a pair of upper and lower links 34, 35 of equal length and a pair of left and right links so as to extend in the direction of the traveling vehicle body 1. Pivot pins 36, 37 to the support bracket 32 between the parts.
A parallel link mechanism 41 for raising and lowering the preliminary seedling table is constructed by connecting a connecting link 40 with pins 38 and 39 pivotally connected to each other at the same interval as the vertical interval of . A hydraulic cylinder 42 is installed between the parallel link mechanism 41 and the vehicle body side, and the hydraulic cylinder 42 is configured to move the distal end portion of the parallel link mechanism 41 on the vehicle body side up and down.

Support shafts 43, 44 extending in the horizontal direction are mounted between the tips of the left and right pair of upper links 34, 34 and between the tips of the lower links 35, 35 in the parallel link mechanism 41 for raising and lowering the preliminary seedling stand. A downward protrusion 45, such as a V-shape, is provided approximately at the center of the support shaft 44 at the tips of both lower links 35, 35, and this protrusion 45 forms a V-shape formed on the upper surface of the hitch 17 at the rear end of the vehicle body 1. It fits into the shaped notch engaging portion 45',
The spare seedling stand 47 is configured so as not to move in the left-right direction, and at both ends of the support shaft 43 at the tips of both upper links 34, 34, there is a spare seedling stand disposed approximately horizontally on the top of the traveling vehicle body 1. A lift ramp 46 is rotatably mounted, and on the upper surface of the ramp 46, a spare seedling stand 47 for placing spare seedling mats to be supplied to the seedling stand 10 is mounted on a trochanter 48. ,4
The seedling table 4 is placed so that it can freely reciprocate in the lateral direction in parallel with the seedling table 10 via the table 9.
A hydraulic cylinder 50 for tilting the lifting/lowering ramp 46 is mounted between the tip of the lower link 6 and the support shaft 44 of the lower links 35, 35.

The parallel link mechanism 22 for raising and lowering the seedling planting device and the parallel link mechanism 41 for raising and lowering the preliminary seedling stand have congruent quadrilaterals and each link is parallel to each other, so that when the seedling planting device 6 is raised and lowered, , both upper and lower links 3 in the parallel link mechanism 41 for raising and lowering the preliminary seedling stand
The support shafts 43 and 44 at the tips of 4 and 35 are configured so as not to move up and down and back and forth, and the seedling planting device 6
When the preliminary seedling stand 47 is raised by the hydraulic cylinder 42, both upper links of the parallel link mechanism 41 are attached to the upper end of the support arm body 15 which is erected from the transmission case 7 along the back surface of the seedling stand. Stopper bodies 51, 51 that 34, 34 come into contact with
is provided.

In this configuration, when the lift switching valve (not shown) is operated to switch to the raised position, hydraulic pressure is sent to the lifting hydraulic cylinder 31 to raise the seedling planting device 6, and at the desired raised position, the lift switching valve is moved to the neutral position. By doing so, the lift will stop at the raised position. During rice planting work, while feeding seedlings on the seedling table 10,
A spare seedling pine is placed on the spare seedling stand 47, and then the seedling planting device 6 is lowered until its float 9 touches the field, and in this state the vehicle body 1 is driven forward to drive the seedling planting device 6. As a result, the seedling pine on the seedling stand 10 is divided into individual plants by the seedling planting mechanism 12, and the seedlings are successively planted in the field area 11.

During this seedling planting work, if there are few seedling pine leaves left on the seedling platform 10, the seedling pine on the preliminary seedling platform 47 is transferred to the seedling platform 10.

This work involves elongating the axial length of the hydraulic cylinder 42 to raise the front end side of the parallel link mechanism 41, and then using the hydraulic cylinder 50 for the lifting/lowering table 46 to move the preliminary seedling stand 47 on the upper surface of the raising/lowering table 46 so that the seedling stand 10 is approximately parallel to the hydraulic cylinder 50. By tilting the seedling pine on the preliminary seedling stand 47 backward and bringing the rear end of the preliminary seedling stand 47 close to the front upper end of the seedling stand 10, the seedling pine on the preliminary seedling stand 47 is slightly stretched.
0 and can be transferred to seedlings.

During such seedling planting work, even if the tiller A surface on which the wheels 4 of the traveling vehicle body run is tilted to the left or right or is uneven, the seedling planting device 6 is connected to the vehicle body 1 so that it can roll freely. Therefore, the seedling planting device 6 can be slid along the field surface 11, and in the case of multi-row planting, the left and right planting depths and planting postures can always be made uniform, and the preliminary seedling stand 47 can also be moved. Since it is provided so that it can be rolled freely relative to the vehicle body 1 and to the seedling planting device 6, the preliminary seedling stand 47 is tilted in accordance with the horizontal inclination of the seedling platform 10 of the seedling planting device 6 during seedling transfer work. 10,
47 can be eliminated from the left and right to make the seedling succession work smoother, and even when the spare seedling stand 47 is placed on the rear upper surface of the vehicle body 1, it can be done regardless of the inclination of the seedling planting device 6, and the link mechanism 22, 41 This means that no excessive force such as twisting is applied to it.

According to the present invention, in a rice transplanter, the spare seedling stand is lowered to the side of the traveling vehicle except when performing seedling splicing work, and the preliminary seedling stand is rolled and locked against the traveling vehicle so that it does not move left or right or roll by itself. Because of this structure, during seedling planting work, only the seedling planting device can be rolled freely, which improves the ability of the seedling planting device to follow the field surface, making it possible to maintain a constant seedling planting depth on both sides of the traveling direction, and to maintain the center of gravity. Since the high reserve seedling stand is not integrated with the seedling planting device, the seedling planting device has the effect of preventing unstable rotation due to rolling.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the main parts of a riding rice transplanter, FIG. 2 is a plan view of FIG. 1,
Figure 3 is a cross-sectional view of Figure 1, and Figure 4 is a cross-sectional view of Figure 1.
FIG. 5 is an enlarged sectional view of the connection portion of the seedling planting device to the traveling vehicle body. 1... Running vehicle body, 2... Vehicle body frame, 4...
Rear wheel, 6... Seedling planting device, 7... Transmission case, 8...
...Planting case, 9...Float, 10...Seedling stand, 12...Planting mechanism, 15...Support arm, 2
2...Parallel link mechanism, 23...Connection hitch, 2
6...Hollow shaft, 32...Support bracket, 41...
...Parallel link mechanism, 46... Spare seedling stand lifting/lowering slope, 47... Spare seedling stand, 51... Stopper body,
17... hitch, 45... protrusion, 45'... engaging portion.

Claims (1)

[Claims] 1. A seedling planting device equipped with a seedling platform is provided on a connecting hitch that protrudes from the traveling vehicle body so as to be able to move vertically, and the seedling planting device equipped with a seedling platform is provided in a manner that the seedling planting device can be rolled freely relative to both the seedling planting device and the traveling vehicle body. A spare seedling stand support bracket is provided, and the spare seedling stand is attached to the support bracket via a link mechanism so as to be able to move up and down between the traveling vehicle body and the seedling planting device, while the spare seedling stand is lowered. A seedling splicing device for a rice transplanter, which is configured such that the spare seedling stand can be engaged with a traveling vehicle body in a non-rollable manner at a certain position.