JPS5942814Y2 - Spare seedling splicing device in rice transplanter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a preliminary seedling splicing device in a rice transplanter.

In a rice transplanter such as a riding type rice transplanter in which a seedling planting device having an inclined seedling platform is connected to a traveling machine, a spare seedling platform provided on the body side is tilted toward the upper end of the seedling platform. If the seedling mat on the seedling stand is added to the seedling stand, the seedling planting work can be carried out continuously and efficiently.

In this case, it is necessary to position the preliminary seedling stand at an angle so that there is no difference in height at the joint between the preliminary seedling stand and the seedling loading stand.

For example, by placing the end of the spare seedling stand in contact with the top of the seedling stand, the weight of the spare seedling stand and the seedling mat on it will be supported by the seedling stand, which increases the strength of the seedling stand. Therefore, the weight of the seedling stand becomes heavier than necessary.

Additionally, when the positioning rod is installed upright from the transmission case in the seedling planting device, the distance from the upper end of the transmission case to the upper end of the seedling platform 1 becomes long, and the rod needs to be made strong to increase its rigidity. There was an inconvenience that the weight of the seedling planting device became large.

In the present invention, when a parallel link mechanism is used to move the spare seedling stand toward the upper end of the seedling stand, the link mechanism itself is provided with a stopper for regulating the proximity position to the seedling stand, making the structure of the regulating device extremely simple. , which is compact and allows for reliable positioning.

Below, to explain the embodiments of the drawings, 1
2 shows a fuselage having a pair of left and right front wheels 2 and a pair of left and right rear wheels 3, and has an engine 4 and a control handle 5 on the front upper surface, and a pilot seat 6 on the midway upper surface. From the output shaft 9 to the mission case 7 on the fuselage 1
Power is transmitted through a belt 8 to the transmission case 7, and the power is transmitted to the front wheels 2 and rear wheels 3 to drive the aircraft 1. A main clutch 11 is provided to cut off power transmission to the transmission case 7, and the clutch pedal 10 is connected to the main clutch 11 by hydraulic pressure.
The engine 4 is equipped with a hydraulic cylinder 18 with a spring 12 adapted to disconnect the engine 4, and a hydraulic pump 15 provided on the lower surface of the engine 4 and which is constantly driven by a belt 14 from the engine 4 independently of the main clutch 11.

Reference numeral 16 denotes a seedling planting device located at the rear of the machine body 1, and the seedling planting device 16 includes a transmission case 18 having a vertically swinging seedling planting mechanism 17 at the rear end, a float 19 attached to the lower surface of the transmission case 18, and Seedling stand 20 tilted so that the upper end approaches the aircraft body
The seedling stand 20 has a lower end connected to the transmission case 18.
It fits into a guide rail 21 for taking out seedlings attached to the upper surface of the housing, and a trochanter at the upper end of an arm 23 installed upright from the transmission case 18 fits into a rail 22 provided halfway on the back surface of the housing, and reciprocates in the left and right lateral directions. It is configured as follows.

This seedling planting device 16 consists of a pair of left and right links 26° and 27 of equal length, which are each connected by a pin to a support 24 erected at the front end of the transmission case 18 and a hitch 25 attached to the rear end of the fuselage 1. The parallel link mechanism 28
The seedling planting device 16 is configured to be raised and lowered by a hydraulic cylinder 29 installed between it and the hitch 25, and the seedling planting device 16 is configured to receive power from a mission case 7 on the fuselage 1 via a flexible shaft (not shown) or the like. It has become.

Reference numeral 30 denotes a spare seedling stand placed on a support stand 31 provided on the upper surface of the rear portion of the machine body 1, and 32 denotes an elevating and descending slope that is located below the spare seedling stand 30 and lifts up the spare seedling stand 30 by rising. are shown, and pins 33 and 34 are attached to the upper part of the support column 24 at the front end of the seedling planting device 16, respectively, and the proximal end thereof is
A parallel link mechanism 37 for raising and lowering the preliminary seedling stand is provided, which consists of a pair of upper and lower equal-length links 35 and 36 that are pivotally connected, and a pin is attached to the tip of the upper link 35 of the parallel link mechanism 37 to allow the lifting and lowering slope 32 to rotate freely. 38 pivots, and the pin 3
A hydraulic cylinder 39 for raising and lowering the preliminary seedling stand is installed between the 8 and the machine body 1, and the pin 40 provided at the tip of the lower link 36 is placed on the stopper part 25' at the upper end of the hitch 25 attached to the machine body 1. At the same time, a link 41 is installed between the pin 40 and the lifting/lowering ramp 32.

This parallel link mechanism 37 for raising and lowering the preliminary seedling stand has a quadrilateral shape that is congruent with the parallel link mechanism 28 for raising and lowering the seedling planting device 16, and connects both upper and lower links 35 and 36 in parallel with a link 43, and its upper link. 35 is provided with an adjustable screw-type lift stopper 42 which stops the lift by coming into contact with the lower link 36 at the upper limit position of the lift tilting table 82.

44 is a switching valve for performing seedling succession work, 45 is a seedling planting device 16
The vertical switching valves 44 for lifting and lowering the seedlings are shown, and the switching valve 44 for seedling splicing operation is connected to the hydraulic pump 15 in the normal state.
A circuit 46 from the elevation switching valve 45 is connected to a circuit 47 to the elevation switching valve 45, a circuit 48 from the elevation switching valve 45 is connected to a circuit 49 to the elevation hydraulic cylinder 29, and a circuit to the hydraulic cylinder 13 of the clutch valve 10 is connected. 50 and a circuit 51 to the hydraulic cylinder 39 for raising and lowering the preliminary seedling stand are connected to the oil tank, and by the switching operation, the circuit 46 from the hydraulic pump 15 to the circuit 47 to the switching valve 45 and the hydraulic cylinder 29 and hydraulic pump 15.
is configured to be connected to circuits 50 and 51.

Further, the lift switching valve 45 has a neutral position in which the lever 52 installed near the operator's seat 6 cuts off the flow of hydraulic pressure into and out of the lift hydraulic cylinder 29, and a raised position in which the hydraulic pressure from the hydraulic pump 15 is sent to the hydraulic cylinder 29. It is configured to be able to switch between three positions: and a lowered position in which the hydraulic pressure of the hydraulic cylinder 29 is released into the oil tank.

In this configuration, when the lift switching valve 45 is switched to the raised position, hydraulic pressure is sent to the lift hydraulic cylinder 29 to raise the seedling planting device 16, and the switching valve 45 is brought to the neutral position at the desired raised position. Lifting stops at the raised position.

During the rice transplanting operation, a seedling mat is supplied onto the seedling platform 20, a spare seedling mat is placed on the preliminary seedling platform 30, and the seedling planting device 16 is lowered by operating the switching valve 45 to the lower position. Since the float 19 touches the field 53, the machine body 1 moves forward in this state and the seedling planting device 16 is driven, so that the seedling mat on the seedling platform 20 is divided into individual plants by the seedling planting mechanism 17. After that, seedlings are sequentially planted in the field scene 53.

During this rice planting work, when the number of seedling mats on the seedling stand 20 becomes low or disappears, seedling transfer is performed to transfer the spare seedling mats on the preliminary seedling stand 30 onto the seedling stand 20.

During this seedling splicing work, the seedling splicing work switching valve 44 is switched.

Then, the hydraulic pressure supply from the hydraulic pump 15 to the switching valve 45 and the hydraulic pressure supply from the hydraulic cylinder 29 to the oil tank are cut off, so the seedling planting device 16 will not be raised or lowered regardless of the switching valve 45 from now on, but will be locked so that it cannot be raised or lowered. At the same time, a hydraulic pump 1 is connected to a hydraulic cylinder 13 that is linked to a clutch pedal 10.
Hydraulic pressure from 5 is sent to operate the hydraulic cylinder 13,
Since the clutch pedal 10 is rotated in the same direction as the foot pedal to turn off the main clutch 11, the power transmission from the engine 4 to the transmission case 7 is cut off, and the driving of the seedling planting device 16 and the traveling of the machine body 1 are stopped. Rice planting work is interrupted.

At the same time, the hydraulic pressure from the hydraulic pump 15 is sent to the hydraulic cylinder 39 for raising and lowering the preliminary seedling stand, and the single lifting unit 32 rises to a horizontal position 1\, and in the middle of its ascent, the preliminary seedling stand
0 in a horizontal state, and when the preliminary seedling stand 30 approaches the top of the seedling stand 20, the stopper 42 of the upper link 35
contacts the lower link 36 and stops rising.

Therefore, by stretching the spare seedling mat on the preliminary seedling stand 30, the seedlings can be transferred to the seedling stand 20, and the seedlings can be transferred.

When this seedling transfer is completed, by operating the seedling transfer work switching valve 44 to the original position, the hydraulic pressure of the hydraulic cylinder 13 in the clutch pedal 10 is released, the main clutch 11 is turned on, and the seedling planting device 16 is turned on. At the same time as driving, the machine 1 starts moving forward and the rice planting work is resumed.

On the other hand, a circuit 51 to the hydraulic cylinder 39 for raising and lowering the preliminary seedling stand
is opened to the oil tank, the lifting hydraulic cylinder 39
is retracted, and the preliminary seedling stand 30 is lowered to a horizontal position and placed on the support stand 31 of the machine body 1, completing the seedling splicing work.

As shown in FIG.
The other end is constituted by a telescoping link 55 equipped with a hydraulic cylinder, one end of both links 54.550 is pivotally connected to the fuselage 1, the other end is pivotally connected to the lifting ramp 32, and a separate hydraulic cylinder (Fig. (not shown), the parallel link mechanism 37 is rotationally driven so that the spare seedling stand 80 on the elevating and lowering slope table 32 can be brought close to the upper end of the seedling stand 20, while both links 5
4. During the 55-hour period, place the spare seedling stand 3 in contact with one of the links.
A stopper 56 may be provided to prevent further rotation when the end of the seedling stand 20 approaches the upper end of the seedling stand 20.

In this embodiment, by extending the telescopic link 55 in the parallel link mechanism, the preliminary seedling stand 30 can be tilted in substantially the same direction as the seedling stand.

According to the present invention, since the position regulating stopper is provided in the parallel link mechanism itself, the structure of the regulating device can be made extremely simple, and the position regulation can be ensured. Since there is no need to stand up from the case or the like for a long time, the movement of the link for raising and lowering the seedling planting device and the parallel link mechanism for raising and lowering the spare seedling stand will not be obstructed.

Since there is no need for positioning by contacting the old seedling platform, there is no need to unnecessarily increase the rigidity of the seedling platform and increase the weight of the seedling planting device.

[Brief explanation of drawings]

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 a spare seedling joint section, Fig. 3 is a hydraulic circuit diagram, and Fig. 4 is another embodiment. It is a schematic side view. 1... Body, 2, 3... Wheels, 16... Seedling planting device, 20... Seedling stand, 30... Spare seedling stand, 37...
Parallel link ml, 35, 36... link, 42...
stopper.

Claims (1)

[Scope of utility model registration request] A seedling planting device having a seedling stand inclined toward the traveling body is connected to the traveling body, and a parallel link mechanism is constituted by a pair of links having a rotating base end on the traveling body or the seedling planting device, and the parallel link In configuring a spare seedling stand disposed at the tip of the mechanism so as to be close to the upper end of the seedling stand by the link mechanism, one link in the link mechanism is provided with one link in contact with the other link. A spare seedling splicing device for a rice transplanter, comprising a stopper for regulating a position where the spare seedling stand approaches a seedling loading stand.