JPH037323B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a rice transplanter used in rice fields.

[Prior art]

As a conventional technology of this type,
As shown in the publication, there is a rice transplanter that is provided with a control device that independently moves the left and right wheels up and down, respectively, and an operating lever that manually moves the left and right wheels up and down.

[Problem that the invention attempts to solve]

However, when the above-mentioned conventional rice transplanter is planting seedlings in a paddy field, the left and right running wheels are moved up and down independently, respectively, and the control that corrects the left and right inclination of the machine body is stopped, and the left and right running wheels are controlled. It was not possible to achieve a control state in which the wheels were moved up and down integrally to keep the height of the machine constant relative to the field. Therefore, when working in a field where the tiller is flat and has been raked cleanly, the control for correcting the horizontal inclination of the machine body should be stopped and the left and right traveling wheels should be moved up and down in unison to adjust the machine body relative to the field. It would be better to set the control state to only control to keep the height constant, which would eliminate malfunctions caused by vibrations of the aircraft and allow the aircraft to run more stably, but in the conventional example, such a control state is not possible. It was something I couldn't do.

[Means to solve the problem]

In order to solve the above problems, this invention
The control that changes the relative vertical position of the left and right running wheels to correct the left and right inclination of the machine is stopped, and is switched to only the control that moves the left and right running wheels up and down as a unit to keep the height of the machine constant relative to the field. This rice transplanter is characterized by having an operable control lever near the control position.

[Function and effect of the invention]

According to this invention, especially when working in a field where the tiller is flat and has been raked neatly, the operation lever can be switched to stop the control that corrects the left and right inclination of the machine body, and the left and right traveling wheels can be moved as one unit. Since it is possible to control the machine by moving it up and down to keep the height of the machine constant relative to the field, there is no malfunction caused by vibration of the machine, and the machine can run stably, resulting in good seedling planting. Can do work. In addition, when moving the wheels up and down while driving on the road or when the aircraft is stopped, if you switch the control lever and stop the control that corrects the left and right tilt of the aircraft, you can avoid unnecessary changes in the relative vertical position of the left and right wheels. It does not change, so maneuverability and operability are good. Therefore, it is possible to select a control state that suits the field and working conditions, and it is possible to obtain a rice transplanter with very good workability.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A walking rice transplanter which is an embodiment of the present invention will be described in detail based on the drawings.

A prime mover 7 is mounted on the front side of the aircraft 1 in the forward direction, and left and right running wheels 3 are mounted on the rear side of the prime mover 7.
A transmission case 9 is provided for transmitting power to the seedling planting device 8 and the seedling planting device 8, and a transmission shaft for transmitting power to the seedling planting device 8 is installed in the rear side of the transmission case 9, and the transmission case 9 is installed toward the rear. The connecting body 10 is extended, and this connecting body 1
A planting mechanism is installed on the rear side of 0, and the left and right planting rods 1
A planting case 12 supporting the plants 1 and 11 is provided. In addition, on the rear side of this planting case 12, there is a pair of left and right handles 1 whose rear portions are curved upward.
3, 13 are provided, and a seedling tank 14 for accommodating seedlings is provided on the front side of the handles 13, 13 and is inclined substantially along the handles 13, 13. Cylindrical rotating parts 15, 15 containing a transmission shaft are provided on both left and right sides of the lower part of the transmission case 9, and chain cases 16, 16 containing a chain transmission mechanism are installed in the rotating parts 15, 15 at the rear. The left and right running wheels 3,
It supports 3. Further, rotating arms 18, 18 are respectively projected upward from the rotating parts 15, 15, and support rods 19, 19 are provided projecting from the lower side of the motor 7 in the left-right direction. Hydraulic cylinders 20, 20 with integrated valves are provided on the left and right sides, respectively, with the front ends of the cylinders 19, 19 supported so as to be movable up and down.
The piston tips of the hydraulic cylinders 20, 20 and the rotating arms 18, 18 are connected by pins, respectively, to form a vertical hydraulic drive mechanism 5 for the left and right traveling wheels 3, 3.

A ground leveling float 21 is provided extending from approximately the center to the rear of the aircraft body 1, the rear part of the ground leveling float 21 is rotatably supported by a support shaft 22 provided at the base of the handles 13, 13, and the front part of the float 21 is is supported by a link 23 at the lower part of the connecting body 10 so as to be vertically movable. In addition, detection floats 2, 2 are arranged on the left and right sides from approximately the center to the front end of the body 1, and the rear portion thereof can be rotated by a support shaft 24 provided at the lower part of the connecting body 10. I support this.

Here, the vertical motion control mechanism 4 for the left and right running wheels 3, 3 will be explained. Support rods 25, 25 are provided in the left and right direction at the lower front end of the motor 7, and the support rods 2
5 and 25 are rotatably provided with the front parts of float support arms 26 and 26, respectively.
and the front parts of the valve operating arms 27, 27 are connected by rods 28, 28, and the rear parts of the operating arms 27, 27 are connected to the hydraulic cylinders 20, 20.
The valve shafts 43 and 43 are respectively pivotally mounted to operate the valves. the float support arm 26;
Float support pins 29, 29 are located approximately in the middle of 26.
are provided so as to be slidably supported in the vertical direction, and the lower ends of the support pins 29, 29 are connected to the detection floats 2, 2.
The support pins 2 are each rotatably attached to the front part of the support pin 2.
9, 29 and the detection floats 2, 2 are provided with elastically biased springs 30, 30, and the vertical movement of the detection floats 2, 2 is controlled via the springs 30, 30 by the float support arms 26, 30. It is transmitted to 26.

Further, the vertical movement of the detection floats 2, 2 is configured to be switched between a state in which they operate individually and a state in which they operate integrally by means of a fixing device 6, which will be described below. That is, the left and right valve operating arms 27, 2
Left and right fixing rods 3 in the left and right direction from approximately the middle part of 7.
1 and 31 are provided protrudingly, a fixing plate 32 is fixed to the left fixing rod 31 at approximately the center of the left and right sides facing each other, a crimping plate 33 is fixed to the right fixing rod 31, and the fixing plate 32 and the crimping plate are fixed to each other. 33 are in sliding contact. A crimping wire 35 having a crimping pin 34 integrally provided at its tip is supported by a wire support plate 36 fixed to the left fixing rod 31, and the crimping pin 34 penetrates through the fixing plate 32 and extends from its tip. The crimping plate 33 is loosely engaged with a vertically elongated hole in the pressure bonding plate 33 via a spring 37 which is slightly biased. Note that the crimp wire 35
is connected to an operating lever 39 supported by a lever guide 38 provided at the middle part of the handle 13, and the lever guide 38 has a lever 39 that actuates the crimp pin 34 to crimp the fixing plate 32. Board 3
A guide strip is provided for crimping and fixing 3 and for separating it.

40 is a fuel tank, 41, 41 are side clutch levers for changing the course of the aircraft 1, and 42 is a lever for turning on/off power to the seedling planting device 8 and the like.

Next, the operation of the walking rice transplanter configured as above will be explained.

The driving wheels 3, 3 are driven by the activation of the prime mover 7, and the machine body 1 moves forward, causing the seedling tank 14 to move laterally and the planting rods 11, 11 to perform the planting action.
When performing this planting action in a normal field, the fixing plate 32 and the pressure bonding plate 33 are separated by operating the operating lever 39, so that the machine body 1 is Even when tilting and swinging from side to side, the left and right detection floats 2, 2 detect the displacement with the soil surface, and the left and right running wheels 3, 3 are moved up and down to accurately tilt the body 1 from side to side. It can be restored and run stably. On the other hand, especially when working in a field where the plow plate is flat and has been plowed neatly, the operation lever 39 is switched so that the fixing plate 32 and the pressure bonding plate 33 are connected to each other.
By crimping and fixing the machine, the control that corrects the horizontal inclination of the machine body is stopped and the left and right running wheels are moved up and down as a unit to maintain a constant height of the machine body relative to the field. This eliminates malfunctions caused by machine body vibrations, allows the machine to run stably, and allows for better seedling planting work. In addition, even when the machine 1 is moved up and down when traveling on the road or when stopped, other than when planting seedlings, the fixed plate 3 can be moved by operating the operating lever 39.
By crimping and fixing 2 and the crimp plate 33, the left and right running wheels 3, 3 can be moved up and down integrally. The body 1 can be stably raised and lowered when stopped and run on the road.

In addition, instead of the operation lever 39, a lever 42 for turning on/off the power of the seedling planting device 8 is used, and when the lever 42 is in the off state, the fixing plate 32 and the pressure bonding plate 33 are
The lever 42 may be crimped and fixed, and moved to separate when the lever 42 is in the on state.

Note that when the hydraulic cylinders 20, 20 are attached to the aircraft body 1 via elastic bodies to move the traveling wheels 3, 3 up and down, the reaction force can be absorbed, so the operation becomes smooth and effective. Therefore, if the body 1 unnecessarily tilts to the left or right, the elastic body may be fixed by a rubber damper device or the like.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 is a partial perspective view. In the figure, reference numeral 1 indicates the aircraft body, 2 indicates a detection float, 3 indicates running wheels, 4 indicates a vertical movement control mechanism, 5 indicates a vertical hydraulic drive mechanism, and 6 indicates a fixing device.

Claims (1)

[Claims] 1 Stop the control that changes the relative vertical position of the left and right running wheels to correct the left and right inclination of the machine, and change the control to only move the left and right running wheels up and down as a unit to keep the height of the machine constant relative to the field. A rice transplanter characterized by having a control lever near the control position that can be switched.