JPS58209909A - Rice planter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an rIA attachment for a rice transplanter which uses a land leveling float to level the headland when turning the machine in a rice planting field, and which controls the vertical response of the leveling 70-t. It is something that

In a conventionally known rice transplanter in which a rice transplanter is equipped with a planting work unit equipped with a soil leveling float that can be moved up and down at the bottom of a traveling vehicle through a lifting device operated by a hydraulic mechanism, when the machine turns on a headland, Since the planting work section is lifted up by the lifting device and moved around, wheel marks from the traveling vehicle remain on the headland, which means that the land must be leveled and leveled again when planting seedlings on the headland. This is not desirable as it requires flattening. For this reason, as soon as the turning operation of the traveling vehicle is completed, the planting section is lowered and the soil leveling float is brought into contact with the ground to erase the wheel marks of the traveling vehicle and level the ground. .

In this case, if the ground pressure of the ground leveling float is weak, sufficient ground leveling and leveling cannot be achieved, so the ground pressure is strong.

That is, it is desirable to maintain the float in a state where it does not easily move up and down. Generally, soil leveling floats have a locking mechanism that locks the vertical movement of the planting section when it is lifted up.
The rice transplanter is also equipped with a sensitivity adjustment mechanism that adjusts the sensitivity of vertical movement when in contact with a circular surface, but when turning the rice transplanter, first turn off the power of the planting section and start the planting operation. stop,
Next, the planting work section is lifted up using the lifting device, the traveling vehicle is then turned by operating the steering wheel, the planting work section is lowered immediately after turning, and then the planting work section is raised at the planting start position. Many operations, such as turning on the power, must be performed continuously and skillfully in an extremely short period of time, making it difficult to operate the locking mechanism, sensitivity adjustment mechanism, etc., and the ground pressure of the float is weak. At present, insufficient headland leveling work is being carried out.

Therefore, in the present invention, when the IC planting work section is lowered by turning off the power to level the headland with the land leveling float, the land leveling float is maintained in a state where it does not easily move up and down, that is, in a state where the ground pressure is strong. When the power is turned on by one person to start the planting work, the leveling float can move up and down freely, so the two operating parts can be switched in conjunction with one operation, which improves the leveling of the headland. In addition, the aim is to deploy a rice transplanter that can adjust the sensitivity of the ground leveling float's one-tod movement during planting work depending on the hardness and softness of the rice field.

For this purpose, the present invention provides the soil leveling float with a sensitivity adjustment mechanism that adjusts the downward pressing force, and combines this sensitivity adjustment mechanism with an operation section that turns on and off power to the planting section. When the operating section is turned on, the upward pressure on the soil leveling float is weakened so that the ground pressure is appropriate, and when the operating section is turned off, one side of the ground leveling float is reduced. This feature is characterized in that the pressing force is increased to increase the ground pressure, and the sensitivity adjustment mechanism is equipped with a sensitivity control device that controls the sensitivity of the vertical response of the soil leveling float. .

The invention will now be described with reference to the illustrated embodiments.

In FIGS. 1 and 2, reference numeral 1 indicates a four-wheeled passenger vehicle, and this vehicle 1 moves by driving front wheels 2 and rear wheels 3, respectively. An elevating link 4 consisting of an upper and lower link is provided, and a planting work unit 5 is attached via this elevating link 4. The elevating link 4 moves up and down by the expansion and contraction of the hydraulic cylinder 6, and also serves as a transmission mechanism for transmitting power from the traveling vehicle 1 to the planting work section 5, and furthermore, the planting work section 5 is mounted so as to be capable of rolling and pitching. There is.

The planting section 5 is connected to the rear end of the lifting link 4 and is installed obliquely above the main body frame l, which also serves as a transmission case, in a backward tilted position, and the planting seedlings are placed on the upper surface of the planting section 5. A seedling stand 8 that moves back and forth in the right direction with a predetermined stroke is provided, and this seedling l1il! A planting body 9 is provided opposite the sloped upper end of the table 8, which reciprocates in the vertical direction with a predetermined locus, cuts out seedlings one by one from the seedling table 8, and plants them on the rice field. Further, on the lower side of the main body frame 7, a center float 10 and side floats i1. Consisting of ii,
A float is provided that comes into contact with the rice field when the planting work part 5 is lowered and levels the ground while sliding on the rice field as the traveling vehicle 1 travels. Center float 10 and night float 1
As shown in detail in FIG. 3, the rear part of the main body frame 7 is rotatably supported in the front direction, and the pivot position i; & □ can be adjusted up and down with respect to the main body frame 7. year,
The depth of planting of seedlings using the planting body 9 is adjusted. Roughly speaking, the front part of the side float 11 is attached to the main body frame 7 via a link body 12 so as to be movable up and down, and the front part of the center float 10 projects forward from the main body frame 1 and is bent upward. The link body 13 is attached to the support arm 13 which extends so as to be vertically movable via the link body 14, and the link body 1 is attached between the pivot positions of the support arm 13 and the link body 14 of the center float 10.
A switching valve 15 is provided which is switched by the vertical movement of the center float 10, that is, by the vertical movement of the center float 10. This switching pulp 15 expands and contracts by switching the oil passage of the hydraulic cylinder 6, and when the traveling vehicle 1 moves up and down due to unevenness of the board, the switching pulp 15 moves the oil passage of the hydraulic cylinder 6 to the planting work part 5 through the lifting link 4.
moves up and down, and in conjunction with this, the front part of the float moves up and down using its rear part as a fulcrum through links 12 and 14, the oil passage is switched, the hydraulic cylinder 6 expands and contracts, and the planting is carried out via the elevating link 4. The working part 5 is moved up and down to keep the ground pressure of the float almost constant.

On the other hand, a planting clutch lever 17 is provided on one side of the driver's seat 16 of the traveling vehicle 1, and between this clutch lever 11 and a gear box 7a provided at the front of the main body frame 7 of the planting work section. An operating wire 18 is strung across, and the power of the planting section 5 is turned on and off by operating a clutch lever 17. Also, clutch lever 1
Another operating wire 19 is connected to 7, and one end of a coil spring 20 is connected to the tip of the inner wire.
The other end of this spring 20 is connected to the protrusion 14 of the link body 14.
The outer tube is connected to one end of a bell crank 21 which is opposed to the distal end side of the support arm 13. The other end of the bell crank 21 is connected to the tip of an operating wire 22, and the proximal end of the operating wire is connected to a control lever 23 provided near the clutch lever 18. Then, during planting work in which the planting clutch lever 17 is operated and the power of the planting work section 5 is set to [human] via the operating wire 18, the operating wire 19 is not pulled and the coil spring 20 is activated. By keeping the spring pressure weak and allowing the link body 14 to move freely up and down, the center float 1
0 maintains good followability to the field surface. In addition, during non-planting work when the power of the planting work part is turned off with the planting clutch 11, the operating wire 19 is pulled and the spring pressure of the coil spring 20 is strengthened, and the link body 14 is connected to the center float 10.
The center float 10
It has an interlocking structure so that it does not easily move up and down while in contact with the rice field. Furthermore, the spring pressure of the coil spring 20 is adjusted by the control lever 23, and the vertical movement sensitivity of the center float 10 is controlled by the hardness and softness of the circular surface.

In the riding-type rice transplanter configured as described above, when planting seedlings, the planting section 5 is lowered by the lifting link 4, and the center float 10 and side floats 11 and 11 are moved in contact with the rice field. At the same time as the vehicle 1 slides while being towed by the vehicle 1, the worker sitting in the driver's seat 16 operates the planting clutch lever 11 to the "J side" to drive the planting work section 5.In the planting work section 5, Planting (= While the seedling platform 8 on which one seedling is placed reciprocates from side to side with a predetermined stroke,
During the planting holiday 9, seedlings are cut out one by one and planted in a circle. In the darkness, when the planting work unit 5 is sliding on the rice field to perform planting, when the traveling vehicle 1 moves up and down due to unevenness of the tiller, etc., the planting work is carried out by the up and down movement of the center float 10, which is a sensing float. The part 5 is moved up and down by the lifting link 4,
Both floats 10 and +1.11 are maintained at a substantially constant ground pressure, and the seedlings are planted by the planting body 9 at an appropriate depth and in an appropriate posture. At this time, the link body 14 of the center 71 coat 10 is hardly regulated by the coil spring 20, so it is controlled by the control lever 23 depending on the hardness or softness of the surface. The planting work section 5 can be moved up and down freely by switching the switching valve 15.
move up and down.

When the rice transplanter reaches the headland at the edge of the field, the operator first operates the planting clutch lever 17 to the "off" side to stop driving the planting work section 5, and at the same time, the operator operates the planting clutch lever 17 to the "off" side to stop driving the planting work section 5. The planting work section 5 is lifted up and the traveling vehicle 1 is turned using the steering handle 24. At the same time as the turning operation of traveling vehicle 1 ends, r
7 By lowering the planting section 5 using the descending link 4 and sliding the floats io and ii in contact with the rice field,
The wheel marks of the traveling vehicle 1 are leveled. At this time, the center float 10 moves downward because the spring pressure of the coil spring 20 is stronger than the set pressure of the control lever 23, so the link body 14 does not easily move up and down. The pressing force of the float 10 is increased to level the circular surface well, and the sensitivity of the vertical movement of the float 10 is so low that the switching valve 15 hardly switches.

Soshi-C1 Rice planting work When m15 reaches the position for planting seedlings,
When the operator operates the planting crane lever 17 to the "E" side to drive the planting work section 5, the center float 10 at the same time returns to normal vertical movement and plants with appropriate vertical movement sensitivity. resumes work. These series of operations, from the ``off'' operation of the planting clutch lever 1 before the start of the aircraft turn to the ``on'' operation after the end of the turn, are performed continuously without stopping the running of the 11 vehicles 1. Therefore, it is a very busy operation for the operator, but in the present invention, the downward pressing sensitivity of the center float 10 is adjusted in conjunction with the "ON 1" and "OFF" operations of the planting clutch lever 11. switched,
In addition to simplifying operations, headland leveling work can be performed accurately.

Thus, according to the rice transplanter of the present invention, when the planting clutch lever is turned on, the downward pressing force of the center float is weakened, the vertical motion sensitivity is adjusted to an appropriate level, and the ground pressure of the float is maintained almost constant. However, accurate seedling planting can be carried out, and when the planting clutch lever is turned off, the downward pressing force of the center float becomes stronger, allowing the float to level the headland accurately. I can do it. Moreover, since these operations are performed in conjunction with each other, even during busy turning operations, no operations are forgotten, and proper work can be performed reliably. Furthermore, during planting work, the vertical motion sensitivity of the -C float can be appropriately controlled depending on the hardness or softness of the circular surface.

[Brief Description of the Drawings] Figure 1 shows an embodiment of the present invention; a side view of a riding type rice transplanter;
FIG. 2 is a plan view of the same, and FIG. 3 is an enlarged side view of the main parts. 1... Running vehicle, 2... Front wheels, 3... Rear wheels, 4...
- Lifting 1 nonk, 5... Planting work part, 6... Hydraulic cylinder, 7... Main body frame, 7a... Gear box, 8... Seedling stand, 9... Planting body, 10...
Center float, 11... Side float, 12.
14... Link body, 13... Support arm, 14a.
・Protruding portion, 15 ・Switching valve, 16 ・Driver's seat, Explosion... Planted clutch lever 118, 19, 22 ・
...Operation wire, 20...Coil spring, 21...Bell crank, 23...Sensitivity control lever, 24...Steering handle. Patent applicant: Iseki Agricultural Machinery Co., Ltd. Representative patent attorney: Haku Kobashi Ukiyo Patent attorney: Susumu Murai

Claims (1)

[Claims] A rice transplanter in which a rice transplanting work part is attached to a traveling vehicle via a coupling device that moves up and down by a hydraulic mechanism, and a rice transplanting work part is provided with a soil leveling float that can move up and down at the bottom,
The soil leveling float and the switching valve of the hydraulic mechanism are configured in an interlocking manner so that the planting work section moves up and down in response to the vertical movement of the float to maintain the ground pressure of the soil leveling float at a nearly constant level. is equipped with a sensitivity adjustment mechanism that adjusts the downward pressing force, and connects this sensitivity adjustment mechanism and an operation section that turns on and off the power to the planting work section.
When set to ``ON'', the downward pressing force of the soil leveling float is weakened to maintain normal ground pressure, and when the control section is set to ``OFF'', the downward pressing force of the soil leveling float is strengthened. The rice transplanter is characterized in that the sensitivity adjustment mechanism is provided with a sensitivity control device that controls the vertical response sensitivity of the soil leveling float.