JPS5942813Y2 - 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 rice transplanter is tilted while approaching the upper end of the seedling stand, which is a spare seedling stand provided on the machine body side. Accordingly, a structure has been adopted in which a spare seedling mat on a spare seedling stand is added to the seedling stand.

However, in this case, the raising and lowering of the seedling planting device and the tilting movement of the spare seedling stand toward the seedling stand are performed using separate operations, so if the spare seedling stand is brought close to the seedling stand, it may be mistaken. When the seedling planting device is lifted up, the seedling stand and the spare seedling stand will collide and not only will one or both of them be damaged, but the collision will damage the spare bamboo mat on the spare seedling stand. Sometimes the load collapsed and fell.

This invention prevents the seedling stand from being damaged due to erroneous operation by configuring the seedling planting device so that it cannot be automatically raised during seedling transfer work when the spare seedling stand is close to the seedling stand of the seedling planting device. This prevents the damage of the seedling stand and the collapse of the load in the spare seedling stand, and at the same time allows the work of joining seedlings to be carried out easily and safely at a low position.

Hereinafter, the first embodiment shown in FIGS. 1 to 3 will be described. In the figures, reference numeral 1 indicates a fuselage having a pair of left and right front wheels 2 and a pair of left and right rear wheels 3. is equipped with an engine 4, a control handle 5, and a control seat 6 on the upper surface of the midway part. Power is transmitted from the output shaft 7 of the engine 4 to a mission case 8 on the fuselage 1 by a belt 9, and from the mission case 9 to the front wheels. The main clutch 11 is connected to the output shaft 7 of the engine 4 and is configured to cut off power transmission to the transmission case 8 by depressing a clutch pedal 10. The clutch belt 10 is equipped with a hydraulic cylinder 12 with a spring 13 that disengages the main clutch 11 by hydraulic pressure, and the belt 1 is constantly connected to the lower surface of the engine 4 from the engine 4 regardless of the main clutch 11.
5 and a hydraulic pump 16 that is transmitted.

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, a float 20 attached to the lower surface of the transmission case 19, and Seedling stand 21 tilted so that the upper end approaches the aircraft body
It consists of a seedling stand 21 and a transmission case 19 at its lower end.
It fits into a guide rail 22 for taking out seedlings attached to the top surface, and a trochanter 25 at the upper end of an arm 24 installed from the transmission case 19 fits into a rail 23 provided midway on the back surface of the guide rail 22 for reciprocating 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 up and down, and a hydraulic cylinder 85 installed between the parallel link mechanism 34 and the hitch 27 allows vertical movement. The seedling planting device 11 is configured to move up and down, and power is transmitted from the tension case 8 on the body 1 via a flexible shaft (not shown) or the like.

Reference numeral 86 denotes a spare seedling stand placed on the support stand 31 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 86 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 parallel link mechanism 43 for raising and lowering the preliminary seedling stand is provided, which consists of a pair of upper and lower links 39 and 40 of equal length that are pivotally connected, and the raising and lowering ramp 38 is rotatably attached to the tip of the upper link 39 of the parallel link mechanism 43. 44 pivots, and the pin 4
A hydraulic cylinder 45 for raising and lowering the preliminary seedling stand is installed between the seedling stand 4 and the machine body 1, and a 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 21 attached to the machine body 1. At the same time, a tilting hydraulic cylinder 41 is installed between the pin 46 and the lifting/lowering ramp 38.

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 11, 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 lift when it comes into contact with the upper and lower links 39 and 40, respectively.The upper end of the link 49, which is pivoted by a pin between the upper and lower links 39 and 40, is provided with an upward and downward slope When the table 88 is tilted,
Adjustable screw-type tilt stopper 5 that restricts tilting movement at a position close to the seedling platform 17 of the seedling planting device 17
0 is set.

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 switch valve 52 is connected to a circuit 54 to the hydraulic cylinder 12 of the clutch pedal 10.
A circuit 57 to the hydraulic cylinder 45, 47 for raising and lowering the preliminary seedling stand and a circuit 58 to the hydraulic cylinder 45, 47 for tilting are connected to the oil tank. The hydraulic pump 16 is configured to disconnect the circuit 54 to the circuit 54 and connect the hydraulic pump 16 to the circuits 57 and 58.

The lift switching valve 52 is connected to the lift hydraulic cylinder 35 via a circuit 55, and is mounted near the operator's seat 60. The lift switching valve 52 is placed in a neutral position where the hydraulic pressure is cut off from and into the lift hydraulic cylinder 35 by means of a lever 52'. A raised position where the hydraulic pressure from the pump 16 is sent to the hydraulic cylinder 35, and a lowered position where the hydraulic pressure of the hydraulic cylinder 35 is released into the oil tank.
It is configured to switch to the position.

Further, the hydraulic cylinder 45 for raising and lowering the preliminary seedling stand and the hydraulic cylinder 47 for tilting operate so that the hydraulic cylinder 45 for raising and lowering operates first, and the stopper 48 of the upper link 39 in the parallel link mechanism 43 comes into contact with the lowering link 40. After that, the diameter of the lifting hydraulic cylinder 45 is configured to be larger than the diameter of the tilting hydraulic cylinder 47 so that the tilting hydraulic cylinder 47 operates, and the lifting hydraulic cylinder 45 is connected to the hydraulic circuit 58.
A check valve 60 and a throttle 61 are provided in parallel in the circuit 59 leading to the tilting hydraulic cylinder 47, so that the tilting hydraulic cylinder 47 moves backward before the lifting hydraulic cylinder 45.

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, so that the seedling mat on the seedling platform 21 is divided into individual plants by the seedling planting mechanism 18. After that, seedlings are sequentially planted in the field scene 62.

During this rice transplanting work, when the number of seedling mats on the seedling platform 21 becomes less or disappears, seedling transfer is performed in which the preliminary seedling mats on the preliminary seedling platform 36 are transferred to the seedling platform 20.

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 the hydraulic pump 16 is sent to the hydraulic cylinder 2 which is linked to lO, the hydraulic cylinder 12 is operated, the clutch pedal 10 is rotated in the same direction as the foot pedal, and the main clutch 11 is turned off.
At 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 traveling 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 raising and lowering the preliminary seedling stand, and the raising and lowering hydraulic cylinders 45 operate in a protruding manner.
rises by 1\ in a horizontal state, and in the middle of the rise, lifts the preliminary seedling stand 86 in a horizontal state by 1\, and when the stopper 48 of the upper link 39 comes into contact with the lower link 40, it rises.

Next, the tilting hydraulic cylinder 47 is operated to protrude, and the lifting tilting table 38 is tilted at 1 where it contacts 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 is tilted in the same direction as the seedling stand 21, the spare seedling mat on the stand 36 can be stretched a little so that the stand 2
1. Seedlings can be transferred to the top.

'When this seedling succession is completed, the switching valve 51 for seedling succession work is
By operating the clutch pedal 10 to its original position,
The hydraulic pressure in the hydraulic cylinder 2 is released and the main clutch 11OH is activated, and at the same time the seedling planting device 17 is driven, the machine 1 starts moving forward and the rice planting work is resumed.

On the other hand, oil cylinders 45.47 for lifting and tilting the preliminary seedling stand
Since the circuit 58 to the oil tank is opened to the oil tank, the tilting hydraulic cylinder 47 is first retracted to return the preliminary seedling stand 38 to a substantially horizontal position, and then the lifting hydraulic cylinder 45 is retracted to place the preliminary seedling. The stand 38 is lowered 1\ from a horizontal state and placed on the support stand 37 of the machine body 1, completing the seedling splicing work.

In this way, in the type in which the preliminary seedling stand 36 is raised and lowered by the link mechanism 43 having a rotating base end on the side of the seedling planting device 17, the rotating base end of the link mechanism 43 corresponds to the vertical movement of the seedling planting device 17. Since they move up and down at the same time, the seedling platform 21 will not collide with the preliminary seedling platform 36 even if the seedling planting device 11 is erroneously raised when the preliminary seedling platform 36 is raised for seedling transfer work. However, since the preliminary seedling stand 36 is at a higher position by the height of the raised seedling device 17, not only does the machine become extremely unstable, but also the seedling transfer work is carried out at a higher position, making it easier and safer to transfer the seedlings. It turns out you can't do it.

In contrast, in the present invention, when the seedling transfer operation is performed as described above, when the seedling transfer operation switching valve 51 is operated to raise the preliminary seedling stand 36, the hydraulic pump 16 is connected to the hydraulic cylinder 35 for raising and lowering the seedling planting device. By cutting the hydraulic circuit, the seedling planting device 11 is prevented from rising even if the lifting switching valve 52 is erroneously raised. The height of seedling splicing does not increase, the seedling splicing can be done easily and safely at a low height position, and it is possible to save time, which would cause the machine body to become extremely unstable due to the seedling splicing becoming high.

FIG. 4 shows an embodiment in which the present invention is applied in a case where a spare seedling stand supported by the machine body is arranged to approach the seedling stand of the seedling planting device at an angle.

In this figure, parts that are substantially the same as those in FIGS.
a indicates a stopper for regulating the inclined position of the preliminary seedling stand 36a.

The preliminary seedling stand 36a, which is pivoted to the upper end of the pitch body 27a of the body 1a, is tilted down by the hydraulic cylinder 45a, and is moved vertically to the body 1a via a link mechanism 34a consisting of a pair of upper and lower links 28a and 29a. When the seedling planting device 17a is configured to be placed on the upper end of the seedling stand 21a, which can be attached freely, the spare seedling stand 36 is used for seedling succession work.
When a is tilted downward from the state shown by the two-dot chain line to the state shown by the solid line, if the raising/lowering switch 4'F52a is operated incorrectly and the seedling planting device 17a is raised by the hydraulic cylinder 34a, the seedling platform 21a is moved to the standby seedling stand 21a. It will collide with the stand 36a.

In contrast, in the present invention, if the switching valve 51a for seedling splicing work is operated to the inclined downward position of the preliminary seedling stand 36a, the hydraulic pressure from the hydraulic pump 16a passes through the switching valve 52a for raising and lowering and reaches the hydraulic cylinder 34a. By cutting this, the seedling planting device 17a is configured to prevent it from rising, so even if the lifting switching valve 52a is accidentally operated during seedling transfer work, the seedling planting device 17a will not move upward. Therefore, the collision between the standby seedling stand and the seedling stand can certainly be reduced in time.

As described above, the present invention provides a seedling planting device that is connected to a machine body having running wheels so as to be able to rise and fall freely via a lifting mechanism, and is provided with a seedling platform whose upper end is inclined toward the machine body, while the seedling platform is mounted on the machine body. A spare seedling stand that moves close to the top of the stand is installed,
The lifting mechanism of the seedling planting device is provided with a means for preventing the seedling planting device from rising when the preliminary seedling stand approaches the seedling stand. Since the seedling stand does not move upward during seedling transfer work, there is no possibility that the height of the seedling transfer work will become extremely high due to incorrect operation, or that the spare seedling stand and the seedling stand will collide. This has the effect of making seedling succession work safe and easy.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a side view of the rice transplanter of the first embodiment, Fig. 2 is a plan view of the rear part of the rice transplanter, Fig. 3 is a diagram showing the hydraulic circuit, and Fig. 4. is a diagram of the second embodiment. 1.1a... Airframe, 2... Front wheel, 8... Rear wheel, 17.17a... Seedling planting device, 21.21 a = Seedling stand, 34.84a... Link mechanism, 86.36a...
・Spare seedling, 38... Lifting/lowering slope, 43... Spare seedling stand link mechanism, 35, 35a... Hydraulic cylinder for lifting/lowering the seedling planting device, 51.51a... Switching valve for seedling succession work, 52
, 52a... switching valve.

Claims (1)

[Scope of utility model registration request] A seedling planting device connected to a body having traveling wheels so as to be able to rise and fall via a lifting mechanism is provided with a seedling platform whose upper end is inclined toward the body, and a seedling platform that moves close to the top end of the seedling platform is provided on the body. A rice planting device comprising: a preliminary seedling stand arranged as above, and a means for preventing the seedling planting device from rising when the preliminary seedling stand approaches the seedling platform in the raising/lowering mechanism of the seedling planting device. Machine seedling succession device.