JPS5942815Y2 - 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.

In addition, when a positioning rod is installed upright from the transmission case in a seedling planting device, the distance from the upper end of the transmission case to the upper end of the seedling stand becomes long, and the rod needs to be made sturdy to increase its rigidity. There was an inconvenience that the weight of the transplantation device increased.

In the present invention, when moving the spare seedling stand toward the top of the seedling stand using the parallel link mechanism, the parallel link mechanism is provided with stoppers for regulating the ascending position and regulating the inclination angle, thereby making it extremely simple and lightweight. This makes it possible to improve the accuracy of each positioning of the seedling stand.

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 13 with a spring 12 adapted to disconnect the engine 4, and a hydraulic pump 15 on the underside of the engine 4, 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 49 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.
A trochanter 24 at the upper end of an arm 23 erected from the transmission case 18 is fitted into a rail 22 provided halfway on the back side of the guide rail 21 for seedling extraction attached to the top surface, and reciprocated in the left and right directions. is configured to do so.

This seedling planting device 16 consists of a pair of upper and lower links of equal length, each having pins 27, 28, 29, and 30 pivotally connected to a support 25 erected at the front end of the transmission case 18 and a hitch bolt attached to the rear end of the fuselage 1. A pair of left and right vertical parallel link mechanisms 33 and 32 consisting of 31 and 32 are connected to the fuselage V so that they can move up and down. The seedling planting device 16 is configured to move up and down, and power is transmitted to the seedling planting device 16 from the mission case 7 on the fuselage 1 via a flexible shaft (not shown) or the like.

Reference numeral 35 denotes a spare seedling stand placed on a support stand 36 provided on the upper surface of the rear portion of the machine body 1, and 37 denotes an elevating and descending ramp that is located below the spare seedling stand 35 and lifts up the spare seedling stand 35 as it rises. are shown, and pins 38 and 39 are attached to the upper part of the support column 25 at the front end of the seedling planting device 16, respectively.
A parallel link mechanism 42 for raising and lowering the preliminary seedling stand is provided, which consists of a pair of upper and lower links 40 and 41 of equal length that are pivotally connected, and the raising and lowering slope 37 is rotatably attached to the tip of the upper link 40 of the parallel link mechanism 42. 43 is pivotally attached, and the pin 4
A hydraulic cylinder 44 for raising and lowering the preliminary seedling stand is installed between the 3 and the machine body 1, and the pin 45 provided at the tip of the lower link 41 is placed on the stopper part 26' at the upper end of the hitch 26 attached to the machine body 1. At the same time, a tilting hydraulic cylinder 46 is installed between the pin 45 and the lifting/lowering ramp 37.

This parallel link mechanism 42 for lifting and lowering the preliminary seedling stand is connected to the parallel link mechanism 33 for lifting and lowering the seedling planting device 16. and the quadrilaterals are congruent, and the upper link 40 has an adjustable screw-type lifting stopper 47 that comes into contact with the lower link 41 at the upper limit position of the lifting ramp 37 to stop the lifting. A pin 48 is provided between the upper and lower links 40 and 41 respectively.
．． At the upper end of the link 49 which is pivoted 48', there is a lifting slope 3
An adjustable screw-type tilting stopper 50 is provided at a position close to the seedling platform 20 of the seedling planting device 16 to restrict the tilting movement when the seedling planting device 7 is tilted.

51 is a switching valve for performing seedling succession work, and 52 is a seedling planting device 16.
The switching valves 51 for seedling splicing work are shown as 1, and the hydraulic pump 1 is in the normal state.
5 is connected to a circuit 54 to the lift switching valve 52, a circuit 55 from the lift switch valve 52 is connected to a circuit 56 to the lift hydraulic cylinder 34, and a circuit 56 to the hydraulic cylinder 13 of the clutch pedal 10 is connected. The circuit 57 and the circuit 58 to the hydraulic cylinders 44 and 46 for lifting and tilting the preliminary seedling stand are connected to the oil tank, and due to the switching operation, the circuit 53 from the hydraulic pump 15 to the switching valve 52 It is configured to disconnect circuit 54 and circuit 56 to hydraulic cylinder 34 and connect hydraulic pump 15 to circuits 57 and 58.

In addition, the lift switching valve 52 has a neutral position where a lever 59 installed near the operator's seat 6 cuts off the flow of hydraulic pressure into and out of the lift hydraulic cylinder 34, and a raised position where hydraulic pressure from the hydraulic pump 15 is sent to the hydraulic cylinder 34. , and a lowered position in which the hydraulic pressure of the hydraulic cylinder 34 is released into the oil tank.

Furthermore, the hydraulic cylinder f44 for lifting and lowering operates first, and the stopper 41 of the upper link 40 in the parallel link mechanism 42 comes into contact with the lower link 41. After that, the lifting hydraulic cylinder 4 is operated so that the tilting cylinder 46 is operated.
4 is configured to have a diameter larger than that of the tilting hydraulic cylinder 46, and a check valve 61 and a throttle 62 are provided in parallel in the circuit 60 leading from the hydraulic circuit 58 to the lifting hydraulic cylinder 44, so that the tilting hydraulic pressure The cylinder 46 is a hydraulic cylinder 44 for lifting and lowering.
It is structured so that employees can leave work earlier.

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 34, the seedling planting device 16 rises, and the switching valve 52 is brought to the neutral position at the desired raised position. Lifting stops at the relevant raised position.

During the rice planting work, a seedling mat is supplied onto the seedling platform 20, a spare seedling mat is placed on the preliminary seedling platform 35, and the seedling planting device 16 is lowered by operating the switching valve 52 to the lower position. Since the float 19 touches the screen 63, the machine 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 63.

During this rice planting work, when the number of seedling mats on the seedling platform 20 becomes low or disappears, seedling transfer is performed by transferring the preliminary seedling mats on the preliminary seedling platform 35 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 15 to the switching valve 52 and the connection from the hydraulic cylinder 34 to the oil tank are cut off, so the seedling planting device 16 does not move up or down regardless of the switching valve 52 from now on, and is 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 drive of the seedling planting device 16 and the movement of the aircraft 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 cylinders 44 and 46 for lifting and tilting the preliminary seedling stand, and the lifting hydraulic cylinder 44 is first operated to project, and the lifting and lowering ramp 3
7 rises from the horizontal state lS, and in the middle of the rise, lifts the spare seedling stand 35 from the horizontal state 1\, and lowers the upper link 40.
When the stopper 47 contacts the lower link 41, it rises.

Next, the tilting hydraulic cylinder 46 operates to project, and the elevating and lowering ramp 37 tilts at the edge contacting the tilt stopper 50, and the preliminary seedling stand 35 on the upper surface approaches the seedling loading table 20, and the seedling loading table 20, the spare seedling mat on the preliminary seedling stand 35 can be moved onto the seedling stand 20 by stretching it a little, and the seedlings can be spliced.

When this seedling transfer is completed, by operating the seedling transfer operation switching valve 51 to its 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, oil cylinders 44 and 46 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 46 is first retracted to return the preliminary seedling stand 35 to a substantially horizontal position.Then, the lifting hydraulic cylinder 44 is retracted and the preliminary seedling stand 35 is lowered by "1" in the horizontal state and placed on the support stand 36 of the machine body 1, completing the seedling splicing work.

In this way, according to the present invention, since the spare seedling stand is raised and tilted using the parallel link mechanism, the height of the spare seedling stand can be lowered at times other than when transferring seedlings, and the center of gravity of the machine can be lowered. Since the parallel link mechanism itself is provided with a stopper for regulating the ascending position and inclination angle, the regulating device can be extremely compact and have a simple structure, and it does not interfere with the movement of the link mechanism. There is no need to increase the rigidity of a seedling planting device that applies an extra load to the seedling platform even when the spare seedling platform approaches the direction of the seedling platform, and the weight is not increased unnecessarily.

Furthermore, although the spare seedling stand 35 may be directly attached to the top surface of the elevating and descending slope table 37, if the spare seedling stand mounted on the top surface of the machine is separated so that it is lifted up by a parallel link mechanism only when transferring seedlings, the spare seedling stand itself will be damaged. By replacing it, you can load the spare seedling mat onto the aircraft at once.

Furthermore, if the rotating base end of the link mechanism is provided on the seedling planting device side, the link can be rotated based on the seedling planting device location regardless of the depth of the tiller, and the spare seedling stand can be placed on the seedlings. When placed close to the table, there is no change in the vertical level difference or inclination angle between the seedling table and the upper end of the table, and seedlings can be transferred in a stable state at all times.

In addition, if the stopper is made adjustable in its regulating position, errors during processing and assembly of the device can be absorbed.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of a riding rice transplanter, FIG. 2 is a plan view of a seedling splicing device, and FIG. 3 is a hydraulic circuit diagram. DESCRIPTION OF SYMBOLS 1... Body, 2, 3... Wheels, 16... Seedling planting device, 20... Seedling stand, 25... Strut, 26... Hitachi, 33... Lifting parallel link mechanism , 42...Parallel link mechanism for elevating spare seedling stand, 40.41...Upper and lower pair link, 37...Elevating and lowering slope, 44.46...Hydraulic cylinder, 47°゛° elevating stopper, 50.・Inclination stopper.

Claims (1)

[Scope of utility model registration request] A seedling planting device having a seedling stand tilted toward the traveling body is connected to the traveling body so as to be movable up and down, and a parallel link mechanism is formed by a pair of upper and lower links having rotating base ends on the traveling body or the seedling planting device. A spare seedling stand that is raised by the upward movement of the parallel link mechanism is disposed at the tip of the parallel link mechanism, and the parallel link mechanism is provided with a mechanism that tilts the spare seedling stand in the same direction as the seedling stand. One link in the parallel link mechanism is provided with a stopper that restricts the rising position of the preliminary seedling stand by contacting the other link, while one of the upper and lower links is provided with a stopper that restricts the rising position of the preliminary seedling stand. A preliminary seedling splicing device for a rice transplanter, which is equipped with a stopper that regulates the angle of inclination of the table.