JPS5942817Y2 - Rice transplanter seedling succession device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for transferring seedling mats to a seedling platform in a seedling planting device of a rice transplanter.

Conventionally, in a rice transplanter such as a riding type in which a seedling planting device having a seedling stand is connected to a traveling machine so as to be movable up and down, the spare seedling stand provided on the body side is tilted so as to approach the upper end of the seedling stand. Due to this, the construction is such that a spare seedling mat is added to the seedling stand on the spare seedling stand.
The height position of the seedling planting device relative to the traveling machine changes depending on the depth of the plow in the field (the difference in height between the plowing surface where the wheels touch the ground and the field surface), and therefore As the relative height positional relationship with the seedling stand attached to the planting device changes depending on the depth of the tiller, the relationship between the seedling transfer position from the reserve seedling stand to the seedling stand also changes, so it is always the same. It is not possible to transfer seedlings depending on the posture, and in addition, conventional spare seedling stands are brought closer to the seedling stand by lowering the side of the seedling stand, and are tilted in the same direction as the seedling stand, so the tiller is In order to ensure that the spare seedling stand is always located above the top of the seedling stand even when the water is deep, the spare seedling stand must be installed at a considerably high position, which raises the center of gravity of the aircraft and makes it unstable. Not only that, but the spare seedling stand ended up blocking the worker's view to a large extent.

The present invention solves the above-mentioned drawbacks by raising and lowering the preliminary seedling stand using a link mechanism based on a point on the side of the seedling planting device.

Below, to explain the embodiments of the drawings, 1
shows a fuselage having a pair of left and right front wheels 2 and a pair of left and right rear wheels 3, an engine 4 and a control handle 5- on the front upper surface, a control seat 6 on the midway upper surface,
Power is transmitted from the output shaft 7 of the engine 4 to the mission case 8 on the fuselage 1 via a belt 9, and the power is transmitted from the mission case 9 to the front wheels 2 and rear wheels 3 to travel on the fuselage 1. The transmission case 8 is connected to the output shaft 7 of the engine 4 by depressing the clutch pedal 10.
It is equipped with a main clutch 11 configured to cut off power transmission to the
The clutch pedal 10 is connected to the main clutch 1 by hydraulic pressure.
It is provided with a hydraulic cylinder 12 with a spring 13 adapted to turn off the N, and also provided with a hydraulic pump 16 on the lower surface of the engine 4, which is constantly driven by a belt 15 from the engine 4 independently of the main clutch 11.

Reference numeral 17 denotes a seedling planting device located at the rear of the body 1, and the seedling planting device 17 includes a transmission case 19 having a vertically swinging seedling planting mechanism 18 at the rear end, and a flowchart attached to the lower surface of the transmission case 19.
20 and a seedling stand 21 whose upper end is inclined so as to approach the aircraft body.
The seedling stand 21 has a lower end connected to the transmission case 19.
A trochanter 25 at the upper end of an arm 24 erected from the transmission case 19 is fitted into a rail 23 provided halfway on the back side of the guide rail 22 for seedling extraction attached to the upper surface, and reciprocated in the left and right directions. is configured to do so.

This seedling planting device 17 consists of a pair of upper and lower equal-length links that are pivoted by pins 30, 31, 32, and 33 on a support 26 erected at the front end of the transmission case 19 and a hitch 27 attached to the rear end of the fuselage 1, respectively. A pair of left and right vertical parallel link mechanisms 34 and 34 consisting of 28 and 29 are connected to the fuselage 1 so as to be able to move vertically, and a hydraulic cylinder 35 installed between the parallel link mechanism 34 and the hitch 27 allows vertical movement. The seedling planting device 17 is configured to move up and down, and power is transmitted to the seedling planting device 17 from the mission case 8 on the fuselage 1 via an unillustrated flexible shaft or the like.

Reference numeral 36 denotes a spare seedling stand placed on a support stand 37 provided on the upper surface of the rear portion of the machine body 1, and 38 denotes an elevating and descending slope that is located below the spare seedling stand 36 and lifts up the spare seedling stand 36 by rising. , and pins 41 and 42 are attached to the upper part of the support column 26 at the front end of the seedling planting device 17, respectively.
A link mechanism 43 for raising and lowering a preliminary seedling stand is provided, which is composed of a pair of upper and lower equal-length links 39 and 40 that are pivotally connected, and the link mechanism 43
The lift ramp 38 is rotatably attached to the tip of the upper link 39 at the pin 44, and a preliminary seedling stand lift hydraulic pressure is provided between the pin 44 and the body 1 to vertically swing the link mechanism 43. The cylinder 45 is mounted, and the pin 46 provided at the tip of the lower link 40 is placed on the stopper part 27' at the upper end of the hitch 27 attached to the fuselage 1, and between the pin 46 and the lifting ramp 38. A tilting hydraulic cylinder 47 is installed.

The parallel link mechanism 43 for raising and lowering the preliminary seedling stand has a quadrilateral shape that is congruent with the parallel link mechanism 34 for raising and lowering the seedling planting device 17, and the upper link 39 is connected to the lower link at the upper limit position of the lifting slope 38. An adjustable screw-type lift stopper 48 is provided, which stops the rise when it comes into contact with 40! In addition, at the upper end of the link 49, which is pivotally connected with a pin between the upper and lower links 39 and 40, when the elevating ramp 38 is tilted, the tilting movement is restricted at a position close to the seedling platform 21 of the seedling planting device 17. A screw-type inclined stopper 50 that can freely adjust the liquid is provided.

51 is a switching valve for performing seedling succession work, 52 is a seedling planting device 17
The vertical switching valves 51 for lifting and lowering the seedlings are shown, and the switching valve 51 for seedling splicing operation is connected to the hydraulic pump 16 in the normal state.
A circuit 53 from the lift switching valve 51 is connected to a circuit 54 to the lift switching valve 52, a circuit 55 from the lift switching valve 51 is connected to a circuit 56 to the lift hydraulic cylinder 35, and a circuit to the hydraulic cylinder 12 of the clutch pedal 10 is connected. 57, and a circuit 5 to the hydraulic cylinder 45, 47 for lifting and tilting the preliminary seedling stand.
8 is connected to the oil tank, but due to the switching operation, the circuit 54 from the hydraulic pump 16 to the switching valve 52 and the circuit 56 to the hydraulic cylinder 35 are cut off.
The hydraulic pump 16 is configured to be connected to circuits 57 and 58.

The lift switching valve 52 is mounted near the operator's seat 6 and has a lever 52' at a neutral position where hydraulic pressure is cut in and out of the lift hydraulic cylinder 35, and a lift switch valve 52 in which the hydraulic pressure from the hydraulic pump 16 is sent to the hydraulic cylinder 35. It is configured to be able to switch between three positions: a lower position and a lowered position in which the hydraulic pressure of the hydraulic cylinder 35 is released into the oil tank.

Furthermore, the hydraulic cylinder 45 for raising and lowering the preliminary seedling stand and the hydraulic cylinder 47 for tilting are operated so that the hydraulic cylinder 47 for raising and lowering operates first.
The diameter of the lifting hydraulic cylinder 45 is set to be smaller than the diameter of the tilting hydraulic cylinder 47 so that the tilting hydraulic cylinder 47 operates after the stopper 48 of the upper link 39 in the parallel link mechanism 43 comes into contact with the lower link 40. While having a large configuration, a check valve 60 and a throttle 61 are provided in parallel in a circuit 59 leading from the hydraulic circuit 58 to the lifting hydraulic cylinder 45, so that the tilting hydraulic cylinder 47 is connected to the lifting hydraulic cylinder 4.
The system is configured so that the worker leaves work before 5.

In this configuration, when the lift switching valve 52 is operated to switch to the raised position, hydraulic pressure is sent to the lift hydraulic cylinder 35, the seedling planting device 17 rises, and the switching valve 52 is brought to the neutral position at the desired raised position. Lifting stops at the raised position.

During the rice planting work, a seedling mat is supplied onto the seedling platform 21, a spare seedling mat is placed on the preliminary seedling platform 36, and the seedling planting device 17 is lowered by operating the switching valve 52 to the lower position. Since the float 20 touches the field 62, the machine body 1 moves forward in this state and the seedling planting device 17 is driven. After being divided, seedlings are sequentially planted in the field scene 62.

During this rice planting work, when the number of seedling mats on the seedling stand 21 becomes low or disappears, seedling transfer is performed to transfer the spare seedling mats on the spare seedling stand 36 onto the seedling stand 21.

During this seedling splicing work, the switching valve 51 for seedling splicing work is switched.

Then, the hydraulic pressure supply from the hydraulic pump 16 to the switching valve 52 and the connection from the hydraulic cylinder 35 to the oil tank are cut off, so that from now on, it will not move up or down regardless of the switching valve 52, and will be locked so that it cannot be raised or lowered. Hydraulic pressure from a hydraulic pump 16 is sent to a hydraulic cylinder 12 that is linked to a hydraulic cylinder 10, which operates the hydraulic cylinder 12, rotating the clutch pedal 10 in the same direction as the foot pedal and turning the main clutch 11 off.
When it is set to F, the power transmission from the engine 4 to the transmission case 8 is cut off, the drive of the seedling planting device 17 and the running of the machine body 1 are stopped, and the rice planting work is interrupted.

At the same time, the hydraulic pressure from the hydraulic pump 16 is sent to the hydraulic cylinders 45 and 47 for lifting and tilting the reserve seedling stand, and the lifting hydraulic cylinder 45 is first operated to project, and the lifting and lowering ramp 3
8 rises from the horizontal position, and on the way up, lifts the preliminary seedling stand 36 from the horizontal position 1\, and lifts the upper link 39
The stopper 48 rises at the groove where it abuts the lower link 40.

Next, the tilting hydraulic cylinder 47 operates to project, and the lifting tilting table 38 tilts to the point where it comes into contact with the tilting stopper 50, and the preliminary seedling stand 36 on the upper surface approaches the seedling stand 21, and the seedling stand Since it slopes in the same direction as 21, spare seedling stand 3
The spare seedling mat on top of 6 can be stretched a little on the seedling stand 21.
Seedlings can be transferred to the top.

When this seedling transfer is completed, by operating the seedling transfer work switching valve 51 to its original position, the hydraulic pressure of the hydraulic cylinder 12 in the clutch petal 10 is released, and the main clutch llO
H, the seedling planting device 17 is driven, and at the same time, the machine 1 starts moving forward and the rice planting work is resumed.

On the other hand, a hydraulic cylinder 45.4 for lifting and tilting the preliminary seedling stand
Since the circuit 58 to 7 is opened to the oil tank, the tilting hydraulic cylinder 47 is first retracted to return the reserve seedling stand 38 to a substantially horizontal position, and then the lifting hydraulic cylinder 45 is retracted to return the reserve The seedling stand 38 is lowered from the horizontal position by 1''l and placed on the support stand 37 of the machine body 1, completing the seedling succession work.

Note that the preliminary seedling stand 36 may be directly attached to the elevating and lowering slope table 38.

In this case, the base end of the vertically swingable link mechanism 43, which is a mechanism for raising and lowering the preliminary seedling stand 36, is pivotally supported on the side of the seedling planting device 17, which moves up and down with respect to the machine body. If it moves up and down in response to changes in the depth of the tiller, the rotational base end of the link mechanism 43 also moves up and down at the same time, and the linkage mechanism 43 swings up and down with the raised or lowered rotational base end as the center point. Since the preliminary seedling stand 36 is raised and lowered by the
The relative positional relationship with the seedling planting device 17 remains approximately constant regardless of changes in the height of the seedling planting device 17 with respect to the body 1.

Therefore, according to the present invention, the posture of transferring seedlings from the preliminary seedling stand to the seedling loading stand remains almost constant without being affected by the height position of the seedling planting device with respect to the machine body, and by extension, the variation in the depth of the plowing plate in the field. Since seedlings can be transferred in this position, there is no risk that seedlings will be difficult to transfer due to changes in posture due to the depth of the tiller, and seedlings can be transferred easily and quickly, and can be easily automated. Moreover, in the present invention, the preliminary seedling stand is raised and brought close to the upper end of the seedling stand by a link mechanism that rotates upward with the seedling planting device side as the rotation base. It can be installed at a location lower than the top of the seedling stand, so the center of gravity of the machine does not become high, improving the running stability of the rice transplanter, and the worker's view is less likely to be obstructed by the spare seedling stand. It has the effect of improving visibility.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of a rice transplanter, FIG. 2 is a plan view of the rear part of the rice transplanter, and FIG. 3 is a diagram showing a hydraulic circuit. 1... Airframe, 2... Front wheel, 3... Rear wheel, 17
... Seedling planting device, 21... Seedling stand, 34... Link mechanism, 36... Spare seedling stand, 38... Elevating and lowering slope table, 4
3...Link mechanism.

Claims (1)

[Scope of utility model registration request] A seedling planting device connected to a body having running wheels so as to be movable up and down is provided with a seedling platform whose upper end is inclined toward the body; and is provided with a vertically swingable link mechanism extending in the direction of the machine body, and a spare seedling stand is provided at the tip of the link mechanism so that upward rotation of the link mechanism approaches the upper end of the seedling stand. A seedling succession device for a rice transplanter that is equipped with a.