JPS6228809Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operating device in a walk-behind rice transplanter for performing a seedling splicing operation for transferring seedling pine on a preliminary seedling stand to a seedling loading stand.

In recent mobile rice transplanters, in order to improve maneuverability, the seedling stand is tilted backwards along the handle located at the rear of the machine. The spare seedling stand in this rice transplanter is installed on the machine body at the front of the seedling stand, so in order to transfer the seedlings on the spare seedling stand to the seedling stand, it is necessary to move from the seedling stand. Workers located at the rear have to extend their hands long beyond the seedling stand to reach the spare seedling stand well in front of it, which makes it difficult to work, and it is difficult to carry out seedling succession work quickly and in a comfortable position. It was hot because I couldn't do it. Also, even if you lower the rice transplanter to lower its height,
This requires a separate operation procedure to lower the rice transplanter, making the operation extremely troublesome.

In this type of rice transplanter with a rearward tilting seedling stand, the axis of the wheel that moves up and down by the lifting mechanism is located near the longitudinal center of gravity of the machine body, and is positioned in front of the seedling stand. The spare seedling stand is constructed so that it can be moved back and forth, and the spare seedling stand is placed at the rear, that is, close to the worker, during seedling succession work, and the wheels are configured so that when the spare seedling stand is moved rearward, the wheels are lowered. As a result, the machine body rises, and as the spare seedling stand moves rearward, the center of gravity in the longitudinal direction of the machine moves to the rear of the wheel axis, and the rear part of the machine automatically descends, making seedling transfer work extremely easy. It is designed so that it can be done quickly with a comfortable posture.

Below, we will explain the drawings of a rice transplanter with 6 rows. In the drawings, 1 connects the frame 4 of the engine 3 to the front part of the transmission case 2, and the transmission case 5 to the rear part through the cylindrical frame 5'. A rice transplanter is shown in which a rice transplanter is equipped with a float 7 on the lower surface of the machine body 6 and runs in the direction of arrow A on a pair of left and right wheels 9, 9. It is equipped with a seedling planting device 12 consisting of a backward-tilting seedling platform 10 and six planting mechanisms 11, and a pair of control handles 13, and floats 8, 8 are mounted on the outside of the wheels 9, 9. The rear end of each of these floats 7, 8, 8 is attached to the handle 13 etc. so that the height can be adjusted by a seedling depth adjustment rod 24, and the front end of the center float 7 is attached to the frame 4. The tips of the floats 8, 8 are configured to be movable up and down via a link 27 on the lower surface of the tips thereof, and the tips of both outer floats 8, 8 are also provided with horizontal bars 31, 31 protruding laterally from the fuselage 6.
It is attached to the tip of the frame via links 32, 32 so as to be vertically movable.

As shown in FIG. 1, the axle 9 of the wheels 9, 9
a is placed near the longitudinal center of gravity of the aircraft 6,
The two wheels 9, 9 are provided with a swing arm 14 whose base is rotatably mounted on the transmission case 2,
Each of the planting mechanisms 11 is attached to the tip of each of the planting mechanisms 14 and is rotatably driven by the transmission case 2 via a chain in the arm or the like, which is transmitted by a belt 16 from a pulley 29 on the output shaft 15 of the engine 3. A hydraulic pump 18 is provided on the upper surface of the frame 4 and is driven by a shaft (not shown) in a cylindrical frame 5' from the transmission case 2, and is driven by a belt 17 from a pulley 30 of an output shaft 15 of the engine 3. It is being

In this case, a tension pulley 57 at the tip of a lever 56 pivotally connected to the transmission case 2 by a pin 55 comes into contact with the belt 16 wound between the engine 3 and the transmission case 2. 57 is pressed by the spring 58 at the other end of the lever 56, power is transmitted, and the other end of the lever 56 is
It is connected to the main clutch lever 59 attached to the control handle 13 via a wire 60, and when the main clutch lever 59 rotates the tension pulley 57 against the spring 58, the belt 16 is loosened and the transmission case is It is configured so that the power transmission to 2 is cut off.

Bell crank type lifting levers 19, 19 are provided on both left and right sides of the mission case 2, rotatably inserted into a shaft 20 which is supported through the mission case 2, and the tips of the lifting levers 19, 19 are connected to the While connected to both swing arms 14, 14 through rods 21, 21, a single-acting hydraulic cylinder 22 is installed in the frame 4 of the engine 3, and its piston 23 extends forward along the center line of the rice transplanter 1. A pin 26 is pivotally connected to the tip of the piston 23 so that the center portion of a swinging rod 25 can swing horizontally, and both ends of the swinging rod 25 are connected to the two lifting levers 1.
The wheels 9, 9 are connected to the other ends of the wheels 9, 19 via connecting rods 28, 28, so that the wheels 9, 9 can be moved up and down in opposite directions, and the wheels 9, 9 can be moved up and down by the operation of a hydraulic cylinder. are configured so that they move up and down in unison,
The hydraulic pump 18 is provided with a 4-port 3-position switching valve 33, and a circuit 36 is connected to the pump port P.
Connect the hydraulic pump 18 through the port A
are connected to the inlet port 22' of the hydraulic cylinder 22 through a circuit 37, and return ports R ₁ and R ₂ are connected to the oil tank 39, respectively, and the spool 4 in the switching valve 33 is connected to the inlet port 22' of the hydraulic cylinder 22 through a circuit 37.
1 is in the neutral position, ports A and R ₁ are closed and ports P and R ₂ are in communication with each other. When the spool 41 moves to the front of the aircraft, ports R ₁ and R ₂ are closed and ports P and A are in communication with each other. When the spool 41 moves to the rear of the machine, ports P and R ₂ and ports A and R ₁ communicate with each other to raise the wheels or lower the machine. It is composed of

Reference numeral 42 denotes a sensor which is pivoted by a pin 43 at the lower part of the frame 4 of the fuselage 6, and the sensor 42 is configured such that its tip is brought into contact with the upper surface of the center float 7 by means of a coiled spring or the like wound around the base end pin 43. energized. 45 is a pin pivotally supported above the switching valve 33. An arm 46 that engages with the spool 41 of the switching valve 33 and a bell crank lever 47 are fixed to the pin 45, and one end of the bell crank lever 47 and the sensor are fixed to the pin 45. 42 and the sensor 42
When the switch valve 33 rotates downward, the switching valve 33 switches to raising the wheels, that is, lowering the aircraft body, and when the sensor rotates upward, the switching valve 33 switches to lowering the wheels, that is, raising the aircraft body. The other end of the crank lever 47 is connected to the control handle 13.
When the lever 49 is rotated forward, the switching valve 33 is switched to lower the aircraft, and the lever Rod 50, so that the aircraft can be raised by rotating 49 backwards.
They are connected via a link 51, a rod 52 and an arm 53. When the manual lift lever 49 is in the aircraft raised position, the sensor 42 that is linked to this comes into contact with the lower surface of the frame 4, while the manual lift lever 49
When the body is in the lowered position, the rod 48 connecting the sensor 42 and the bell crank lever 45 is compressed by the flexural deformation of the spring 48' provided in the middle, thereby preventing the sensor 42 from pressing excessively against the float 7. At the same time, the manual lift lever 49 is allowed to rotate to the lowered position of the aircraft body, in other words, the manual lift lever 49 is allowed to move the aircraft vertically with priority over the vertical movement of the aircraft body by the sensor 42. It is composed of

A preliminary seedling storage case 30 is provided on the upper surface of the cylindrical frame 5', and a preliminary seedling stand 34 made of a wide round bar extending in both left and right directions of the body 6 is provided on the upper surface of the storage case 30. When placing a large number of spare seedling mats 35 on the spare seedling table 34, a pair of left and right guide rails 3 are provided on the left and right upper surfaces of the storage case 30, which extend parallel to the front and back direction of the machine body 6.
8 and 38 are provided in an inclined manner so that the rear part is higher than the horizontal direction, and guide frames 40 and 40 having a downward U-shaped cross section are provided in parallel on the lower surface of the preliminary seedling stand 34, and both guide frames 40 . The sensor 42 is interlocked and connected via a wire 54 so that the sensor 42 rotates upward when the seedling stand 34 is moved rearward.

The spare seedling stand 34 is attached to the other end of the lever 56 of the tension pulley 57. If the spare seedling stand 34 is moved rearward, the tension pulley 57 rotates against the spring 58, and the tension pulley 57 is moved to the transmission case 2. The two guide rails 38, 38 are provided with a plurality of trochanters 62, and the rear surface of the preliminary seedling stand 34 has a planar U-shape extending rearward. A spring 64 is installed between the spare seedling stand 34 and a guide rail or the like on the machine side to make it easier to move the spare seedling stand 34 rearward. The lower surface of one of the guide frames 40 in the seedling stand 34 is provided with a stopper 65 that comes into contact with a protrusion 65 of the guide rail 38 at the end of the rearward movement of the preliminary seedling stand 34 to prevent it from moving further backward. ing.

In addition, both guide frames 4 in the preliminary seedling stand 34
There is a T in the center of the lower surface of the plate 67 installed between 0 and 40
The mold lever 68 is fixed with a pin 69 so as to be horizontally rotatable,
Lock pins 70, 70, which are provided on both guide frames 40, 40 so as to be freely protrusive and retractable, are connected to both ends of the lever 68 so that they can be moved in and out simultaneously by the rotation of the lever 68. Lock pin 7
A grip lever 73 is provided with a spring 71 that always urges the levers 0 and 70 in the projecting direction, and one end of the lever 68 is provided on the handle 63 via a wire 72.
The lock pins 70, 70 are connected to the guide rails 38, 38 so that the lever 68 can be rotated by operating the grip lever 73. and pin holes 75, 75 into which both the lock pins 70, 70 are fitted when the preliminary seedling stand 34 is moved to the rear end, and the preliminary seedling stand 34 is placed in a predetermined position. It is configured so that it can be locked immovably in both rearward travel positions. Furthermore, it goes without saying that the preliminary seedling stand may be moved back and forth dynamically using hydraulic pressure or the like.

In this configuration, prior to the rice planting work, seedling mats are supplied and placed on the seedling platform 10, while a spare seedling mat 35 is placed on the preliminary seedling platform 34, and then the floats 7, 8, and 8 are placed on the field surface. , the aircraft 6 moves straight, and each planting mechanism 11 and seedling stand 10
By driving the seedling pine on the seedling platform 10, each planting mechanism 11 divides the seedlings one by one and plants them along six rows in the field. During this rice planting work, if the height of the machine relative to the field changes due to irregularities in the plowing plate on which the wheels 9 touch the ground and the field surface on which the floats 7, 8, and 8 touch the ground, the height of the machine relative to the field changes. The downward rotation of the contacting sensor 42 causes the switching valve 33 to switch to raising the wheels, that is, lowering the machine body, and the machine body is returned to a predetermined height position, and the height relative to the field is lowered. When the height of the machine relative to the field scene changes, the sensor 42 rotates upward and the switching valve 33 lowers the wheels, i.e., raises the machine, and returns the machine to a predetermined height position. can be automatically controlled and adjusted to a predetermined height position. When the number of seedling mats on the seedling stand 10 becomes low or disappears, the traveling of the machine 6, the planting mechanism 11, and the driving of the seedling stand 10 are stopped, and the spare seedling pine 35 of the spare seedling stand 34 is removed. , transfer the seedlings to the seedling stand 10.

During this seedling succession work, a seedling stand 10
When a worker (not shown) located between the two operating handles 13 at the rear of the holder moves the preliminary seedling stand 34 in the rearward direction, the preliminary seedling stand 34 approaches the operator;
A sensor 42 interlocked and connected to this preliminary seedling stand 34 via a wire 54 rotates upward, and the switching valve 3
3 switches to lowering the wheels or raising the aircraft. In this case, as the preliminary seedling stand 34 moves backward,
The center of gravity of the aircraft body 6 in the longitudinal direction is located at the axle 9a of the wheel 9.
Since it moves further backwards, the rear part of the machine body 6 is tilted so as to automatically descend, and the seedling stand 10 and the spare seedling stand 34 located at the rear of the machine body are automatically lowered (note that , according to this example,
As the preliminary seedling stand 34 moves backward, the movement of the rice transplanter and the drive of the seedling planting mechanism are automatically stopped in conjunction with this.

Therefore, according to the present invention, the operation of bringing the spare seedling stand closer to the operator and the seedling stand and the operation of lowering the rear part of the rice transplanter can be performed at the same time, which eliminates the trouble of operating these separately. In addition, as the spare seedling stand approaches the worker and the seedling stand, the spare seedling stand and the seedling stand descend, allowing the worker to easily access the stand. The distance to reach and transfer the seedlings on the spare seedling stand to the seedling stand is short, and the transfer of the seedlings can be done from a low height position, so the operator can do it in an extremely comfortable posture. This allows for faster seedling succession work with less fatigue, improving work efficiency.Furthermore, the spare seedling stand is located at a lower location.
It is also possible to easily load seedlings onto the preliminary seedling stand.

Furthermore, according to the present invention, the rice transplanter is tilted so that the rear part is lower during seedling transfer work, and the angle of inclination of the rear-tilting seedling stand becomes close to horizontal, so that the rice transplanter does not move the seedlings onto the seedling stand. This makes it possible to prevent the seedling mats from collapsing when replenishing the seedling mats, and to easily and reliably supply the seedling mats correctly so that they do not float up relative to the seedling table.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a side view of the rice transplanter, Fig. 2 is a plan view of Fig. 1, Fig. 3 is an enlarged view of the power transmission section from the engine to the transmission case, and Fig. Figure 4 is a perspective view of the lifting mechanism, Figure 5 is the third
6 is an enlarged view of the main part of FIG. 1, FIG. 7 is a partially cutaway plan view of FIG. 6, and FIG. 8 is an enlarged sectional view of FIG. 6, and FIG. The figure is an enlarged cross-sectional view taken from - in FIG. 6. 1... Rice transplanter, 6... Aircraft, 9... Wheels, 13
... Control handle, 10 ... Seedling stand, 11 ... Planting mechanism, 22 ... Hydraulic cylinder, 33 ... Switching valve,
34... Spare seedling stand, 38... Guide rail, 42
...sensor, 54...wire.

Claims (1)

[Scope of utility model registration request] In a rice transplanter that is equipped with wheels that move up and down by a lifting mechanism in the middle of the machine body, and a control handle, a backward-tilting seedling stand, and a planting mechanism at the rear of the machine body,
The axis of the wheel is arranged near the center of gravity in the longitudinal direction of the machine body, and a spare seedling stand is provided on the machine body in front of the seedling stand so as to be movable back and forth. A seedling splicing operating device for a rice transplanter, characterized in that wheels are associated with each other so as to move downward when the seedling stand is moved backward.