JPH0340093Y2 - - Google Patents

Description

[Detailed explanation of the invention] "Industrial application field" This invention controls the planting depth of the entire rice transplanting machine via the vertical hydraulic cylinder based on the detection of the pitching sensor, and also controls the planting depth based on the detection of the rolling sensor. The present invention relates to a rice transplanter that performs horizontal control via a horizontal hydraulic cylinder based on the above.

"Prior Art" Conventionally, when rolling sensors are disposed on both sides of the front part of a rice transplanting machine, a pivot shaft that supports the rear end of the sensor is fixed to a swing case (movable member). ``Problems to be Solved by the Invention'' In the prior art, the pivot shaft also moves as the wheels move in and out due to the horizontal control operation, that is, the vertical swing of the swing case, causing the rolling sensor to malfunction.
There was a problem that made it difficult to perform proper horizontal control.

``Means for Solving the Problems'' However, the present invention supports the front part of the rolling sensor so as to be vertically rotatable via a fulcrum shaft on the bumper on the front side of the rice transplanting machine, and also includes a vertical movement guide at the rear part of the rolling sensor. connecting the links and supporting the links via a pivot shaft on a fixed part of the rice transplanting machine;
Further, the rear end of the bumper is extended above the rolling sensor to near the rear end.

``Operation'' Therefore, according to the present invention, the rolling sensor is not operated incorrectly due to the swinging of the swing case as in the conventional case, but the sensor can be operated appropriately even when the rice transplanter body is tilted from side to side. In addition to being able to perform horizontal control, the sensor and the vertical movement guide link are protected by the bumper, thereby preventing damage due to contact with other objects.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Fig. 1 is a side view of the main parts, Fig. 2 is a side view of the walk-behind rice transplanter, and Fig. 3 is a plan view of the same part. A planting case connected to the case 2 via a transmission case 4, 5 a bonnet that covers the upper side of the rice transplanting machine constituted by the engine 1 and each case 2, 3, and 4, 6 a bumper, and 7 the planting case. A steering handle 8 is connected to the case 3, and a seedling stand 11 is attached to the upper side of the handle 7 so as to be able to slide back and forth from side to side via guide rails 9 and 10.
12 is a transverse feed shaft that is attached to the planting case 3 and drives the seedling tray 8 in a transverse manner; 12 is attached to the planting case 3 via the planting arm 13 to transfer one seedling from the seedling tray 8; A pair of left and right paddy wheels 14 are supported on the transmission case 2 via the swing case 15 so as to be able to rise and fall freely, and 16 are attached to the swing cases 15 and 15 via the left and right swing rods 17, 17. A vertical hydraulic cylinder 18 connects and simultaneously controls the entry and exit of the left and right rice paddy wheels 14, 14 to raise and lower the rice transplanting machine; 18 is a front link 19 located below the engine 1 and each case 2, 3, 4;
and a leveling float for leveling the planting field supported via a planting depth lever 20; 21 is the planting claw 12;
A pitching sensor 22 is arranged in front of the swing case 15 on both sides of the front part of the float 18 to detect the rise and fall of the front part of the float 18 as the planting depth of the seedlings changes. It is a rolling sensor that detects.

The engine 1 is connected and supported to the transmission case 2 via a body frame 23, and the vertical hydraulic cylinder 16 is attached to the body frame 23, and a pitching adjustment cylinder shaft 25 is attached to the tip of the piston rod 24 of the cylinder 16. Connect and fix the middle. The middle of the rolling adjustment shaft 26 is rotatably inserted into the cylindrical shaft 25, and arms are attached to both ends of the shaft 26 so that the pushing and pulling directions of the left and right swing rods 17, 17 are reversed by the rotation of the rolling adjustment shaft 26. A horizontal hydraulic cylinder 28 is provided which connects the brackets 17a at the tips of the swing rods 17, 17 through the swing rods 27, 27, and also corrects the left and right inclination of the rice transplanting machine to keep it approximately horizontal. It is attached via a bracket 29 and connects the piston rod 30 of the cylinder 28 to the rolling adjustment shaft 26 via an arm 31.
Through control, each of the axes 25 and 26 is slid in the longitudinal direction of the machine, and the left and right swing rods 17 and 17 are pushed and pulled in the same direction to raise and lower the rice transplanting machine, keeping the seedling planting depth approximately constant while keeping it level. Hydraulic cylinder 2
8 control to rotate the rolling adjustment shaft 26,
The left and right swing rods 17, 17 are pushed and pulled in different directions to make the support heights of the left and right wheels 14, 14 different, so that the rice transplanting machine is supported substantially horizontally.

The engine also includes a hydraulic unit case 34 for driving and controlling the vertical hydraulic cylinder 16 and the horizontal hydraulic cylinder 28, and the unit case 34 is fixedly mounted on the upper surface of the vehicle body frame 23 in front of the engine 1, and is attached to the U-shaped bumper. 6 The bumper 6 has a front end connected and fixed to the front part of the vehicle body frame 23 via a support frame 35, and extends to the front end so as to be substantially aligned with the outside of the left and right swing case 15.
The left and right rear portions of the bumper 6 are connected and fixed to both rear sides of the vehicle body frame 23 via support pipes 36, and the bumper 6 is integrally fixed to the vehicle body. A support link 37 fixed to the upper part of the front end of the rolling sensor 22 is loosely supported by a single fulcrum shaft 38 which is connected and fixed to the left and right lower parts of the front part of the bumper 6, and the front end of the sensor 22 is attached to the front part of the bumper 6. The lower end of a vertical guide link 41 formed with a long hole 40 is connected to a fixing pin 39 provided on the upper surface of the rear end of the sensor 22 so as to be rotatable up and down. The upper part of the link 41 is supported through the elongated hole 40 by a pivot shaft 42 fixed to the fuselage, and the rear end of the sensor 22 is fixed to the fuselage by the pivot shaft 42 to regulate the descending and ascending ranges so that it can freely move up and down. It is configured to guide and support.

On the other hand, the middle of a balance rod 45 installed in the left-right direction of the machine is integrally fixed to the lower side of a boss 44 that rotatably fits on the tip side of a rolling fulcrum shaft 43 provided at the top of the drive unit case 34. Balance rod 4
The upper end of a telescopic sensor arm 49 with a turnbuckle 48 is connected to an input arm 47 fixed to both ends of an inner shaft 46 which is rotatably inserted into the inner shaft 46, and the lower end of the sensor arm 49 is connected to the support link. 37, and when the left and right rolling sensors 22 move up and down in the same direction at the same time, the left and right input arms 47 swing around the inner shaft 46, thereby forming a rolling hydraulic pressure switching valve provided in the hydraulic unit case 34. 50 is held neutral, and when the left and right rolling sensors 22, 22 move in different directions or only one of them moves up and down, the rolling fulcrum shaft 4 changes due to the difference in the amount of rocking of the left and right links 37.
The horizontal hydraulic cylinder 2 is rotated by swinging the balance rod 45 around the horizontal hydraulic cylinder 3 and operating the rolling hydraulic pressure switching valve 50.
8 is configured to drive and control.

Furthermore, the front end side of the spool 52 of the switching valve 50 is engaged with a bracket 51 fixed to the left side of the balance rod 45, and the spool 52 is moved to the left and right of the aircraft by swinging the balance rod 45 about the rolling fulcrum shaft 43. The rolling switching valve 50 is configured to be operated and controlled by sliding in the direction.

Note that the hydraulic unit case 3 is connected to the hydraulic unit case 3 via the pitching sensor fulcrum shaft 53 and the connecting rod 55.
A pitching sensor 21 is connected to the steering wheel 7, and the sensor 21 detects the vertical movement of the front part of the leveling float 18 to automatically operate the vertical hydraulic cylinder 16, while the vertical lever provided on the steering handle 7 56 is connected to the pitching sensor 21, and the vertical hydraulic cylinder 16 is operated by manual operation of the lifting lever 56.

This embodiment is configured as described above, and the seedling stand 8
The rice transplanter is moved back and forth from side to side, and one seedling is taken out one by one from the seedling platform 8 using the planting claw 12 and planted.The vertical hydraulic cylinder 16 is actuated by operating the lifting lever 56, and the rice transplanting machine is raised and lowered. At the same time, the front part of the leveling float 18 moves up and down due to changes in the unevenness of the tiller, the pitching sensor 21 moves up and down, the vertical hydraulic cylinder 16 operates, and the rice planting The machine body moves up and down to keep the ground pressure of the leveling float 18 substantially constant, and to keep the seedling planting depth of the planting claws 12 substantially constant. In addition, when the rice transplanting machine tilts to the left or right due to changes in the unevenness of the tiller, the left and right rolling sensors 22, 22 move in different directions, or only one of them moves up and down, and the horizontal hydraulic cylinder 28 operates to transplant rice. The rice transplanting machine is tilted left and right to keep it approximately horizontal with respect to the planting field.

At this time, the left and right rolling sensors 22 are supported at their rear parts by a pivot shaft 42 fixed to the fuselage via a vertical guide link 41 and an elongated hole 40 around a fulcrum shaft 38 due to changes in ground pressure with the rice field. Since the sensor 22 swings up and down while moving up and down, the sensor 22 can appropriately detect the left and right inclination of the rice transplanting machine without receiving any operating force other than the ground pressure with the rice field.

"Effect of the invention" As is clear from the above embodiments, the present invention has a rolling sensor 22 that detects the left and right inclination of the rice transplanting machine.
In a structure in which the rice transplanting machine is horizontally controlled via a horizontal hydraulic cylinder 28 based on the detection of the rolling sensor 22, the front part of the rolling sensor 22 is connected to the bumper 6 on the front side of the rice transplanting machine via a fulcrum shaft 38. A vertical movement guide link 41 is connected to the rear of the rolling sensor 22, and the link 4 is connected to a fixed part of the rice transplanting machine, that is, a bumper 6 via a pivot shaft 42.
1, and the rear end of the bumper 6 is extended to the vicinity of this rear end above the rolling sensor 22, unlike the conventional swing case 14.
It is possible to properly operate the sensor 22 and perform appropriate horizontal control just by the left and right tilt of the rice transplanting machine without causing the rolling sensor 22 to malfunction due to the rocking of the rice transplanter.
Also, the vertical guide link 41 is protected by the bumper 6, and has a remarkable effect that damage caused by contact with other objects can be prevented.

[Brief explanation of drawings]

FIG. 1 is a plan view of a main part showing an embodiment of the present invention, FIG. 2 is a side view of the whole, and FIG. 3 is a partial plan view of the same. 6...Bumper, 22...Rolling sensor,
28... Horizontal hydraulic cylinder, 38... Fulcrum shaft,
41...Vertical movement guide link, 42...Pivot shaft.

Claims (1)

[Scope of utility model registration request] In a structure that is equipped with a rolling sensor that detects the left and right inclination of the rice transplanting machine, and horizontally controls the rice transplanting machine via a horizontal hydraulic cylinder based on the detection of the rolling sensor, a fulcrum shaft is attached to the bumper on the front side of the rice transplanting machine. The front part of the rolling sensor is supported to be rotatable up and down, a link for vertical movement guidance is connected to the rear part of the rolling sensor, the link is supported by a fixed part of the rice transplanting machine via a pivot shaft, and the A planting control device for a rice transplanter, characterized in that a rear end of a bumper is extended above a rolling sensor to near the rear end.