JPH0331128Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a paddy field working machine in which a working device is connected to a traveling machine body so as to be able to move up and down as well as drive and roll.

[Conventional technology]

Conventionally, as a paddy field working machine having the above-mentioned structure, there is one in which the seedling planting device of a riding rice transplanter is connected to the seedling planting device in a freely driving rolling manner, as shown in Japanese Patent Application Laid-Open No. 57-99116. The seedling planting device is driven and rolled based on the ground pressure of ground sensors provided on the left and right sides of the seedling planting device, and the seedling planting device is maintained in a horizontal state along the rice field.

[Problem that the invention attempts to solve]

In the driving rolling structure of the above reference, the ground sensor is urged downward by a spring or the like, so the detection sensitivity of the sensor decreases in fields that contain a lot of moisture and are soft, and in fields that are soft and have little moisture, There is a problem that the sensor reacts sensitively and is frequently driven and rolled, so there is room for improvement.

The purpose of the present invention is to obtain a configuration that can perform control based on sensor sensitivity as appropriate as possible depending on the hardness of the rice field.

[Means for solving problems]

The features of the present invention are that the paddy field work machine having the above configuration is provided with a ground sensor that rolls following the rice field surface, and that a control mechanism is configured to drive and roll the work machine based on the rolling amount of this sensor. , a biasing mechanism is provided which applies a restoring force to the ground sensor, and the biasing force of the biasing mechanism is configured to be changeable;
And the effects are as follows.

[Effect]

When the above configuration is configured as shown in Fig. 1 and applied to the seedling planting device B of a riding rice transplanter, when working in soft rice fields, all you have to do is operate and set the sensitivity setting lever 31 in the direction H side. The coil spring 23 of the biasing mechanism C becomes more relaxed, and the ground sensor S can rotate by a predetermined amount even with a weak ground pressure change. Further, in a hard rice field, the coil spring 23 becomes more tensioned when the sensitivity setting lever 31 is operated in the opposite direction, and the ground sensor S will not rotate by a predetermined amount unless there is a large change in ground pressure.

[Effects of the invention] Therefore, by simply setting the ground sensor in a rolling structure and in a structure in which the urging force of the restoring urging mechanism can be changed, the sensor sensitivity can be adjusted based on the appropriate sensor sensitivity depending on the hardness of the rice field. We obtained a configuration that allows for controlled control.

In particular, in the configuration of the present invention, since the ground sensor has a rolling structure, one spring can be used for the biasing mechanism, and the structure for setting the sensor sensitivity has the effect of reducing the number of parts and simplifying the structure.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 4, a seedling planting device B is connected to the rear end of the traveling machine A, which has a boarding and operating section 1 in the center, through a link mechanism 3 that is driven up and down by a hydraulic cylinder 2, and is used for paddy field work. A riding rice transplanter is configured as an example of the machine.

The seedling planting device B consists of a transmission case 4, four planting arms 5..., a seedling stand 6, and three soil leveling floats 7... The structure is such that seedlings are cut out and planted one by one on the field surface T using a planting arm 5.

As shown in FIGS. 1 and 2, the seedling planting device B has a longitudinal axis P with respect to the link mechanism 3.
Drive rolling is connected freely around the
Based on the rolling amount of a ground sensor S provided immediately in front of the seedling planting device B, the seedling planting device B is configured to be driven and rolled so as to take a posture along the rice field T.

That is, the boss member 8 is fixed to the lower end of the vertical link member 3a at the rear end of the link mechanism 3, and
A transmission case 4 of the seedling planting device B is connected to the rear end of a rolling shaft 9 rotatably supported on the boss member 8 about an axis P, and an arm 10 provided on the transmission case 4; A double-acting hydraulic cylinder 12 is interposed between a member 11 extending from the link member 3a, and the seedling planting device B is rolled by expansion and contraction of the cylinder 12. Another boss member 13 is provided on the lower surface of the member 8, and a biasing mechanism C that applies a biasing force to the ground sensor S is provided on the boss member 13 so as to be rotatable about the longitudinal axis Q.

Potentiometers 15 and 16 are attached to the front end of the rolling shaft 9 and the rear end of the shaft 14 to electrically detect the amount of rotation, respectively.
As shown in Figure 3, the amount of rolling of the ground sensor S shown on the aircraft body and the seedling planting device B relative to the aircraft body
The signals from the two potentiometers 15 and 16 are input to the control device 17 so that the drive rolling amounts of the cylinders 12 and 12 coincide with each other, and the solenoid valve V ₁₂ for the cylinder 12 is operated by the signal from the device 17. A control mechanism D for drive rolling is configured.

Further, a float-shaped grounding body 19 is provided at the downwardly extending end of the rod 18 provided in the left-right direction from the front end of the shaft 14.
19 is attached to constitute the ground sensor S, and the biasing mechanism C has an outer portion locked to an arm 20 fixed to the shaft 14 and a bracket 21 attached to the link member 3a. The coil spring 23 is provided between the wire 22 and one end of the wire 22.

Further, the seedling planting device B has a rice field T for the machine A.
The structure is such that automatic elevation control is performed in response to level changes.

That is, as shown in FIG. 1, among the three ground leveling floats 7..., the center one is pivotally connected to the transmission case 4 by a left-right shaft 24 at the rear, and
It is supported by the transmission case 4 via a bending/extending link mechanism 25 at the front thereof, and this bending/extending link mechanism 25
is a spring 2 that urges the float 7 downward.
6, and a wire 2 for detecting a change in the ground pressure of the float 7 against the rice field from the deformation of the bending/extending link mechanism 25.
One end of 7 is attached. The other end of this wire 27 is connected to a mechanism 28 that operates the spool V _2S of the hydraulic valve V ₂ for the lifting hydraulic cylinder 2, and automatically lifts and lowers the seedling planting device B based on changes in the ground pressure of the float 7. It is structured like this.

Further, the spool operating mechanism 28 is connected to a lifting lever 29 provided on the driving section 1, so that the seedling planting device B can be raised or lowered as desired by operating the lever 29.

and the other end of the wire 30, one end of which is connected to the upper end of the spring 26 provided in the bending/extending link mechanism 25;
and the other end of the wire 22, one end of which is connected to the coil spring 23, are both connected to a sensitivity setting lever 31 provided in the operating section 1.
The structure is such that automatic lifting and lowering control and automatic rolling control can be performed with a sensitivity that corresponds to the hardness of the rice field T by the operation of step 1.

By operating and setting the sensitivity setting lever 31 in the direction H, both the spring 26 and the coil spring 23 become more relaxed, and control is performed even with a small ground pressure change. When set, control will not be performed unless there is a larger ground pressure change.

[Another example]

In addition to the embodiments described above, the present invention may be configured such that, for example, rolling control and lifting control are performed by driving an electric motor or the like.

[Brief explanation of the drawing]

The drawings show an embodiment of the paddy field working machine according to the present invention, FIG. 1 is a schematic perspective view showing the rolling structure of the seedling planting device, the biasing force changing structure of the ground sensor, etc., and FIG. 2 is a schematic perspective view of the seedling planting device. FIG. 3 is a side view showing the rolling structure, FIG. 3 is a block diagram showing the configuration of the rolling control system, and FIG. 4 is an overall side view of the rice transplanter. A... Traveling body, B... Work device, C... Biasing mechanism, D... Control mechanism, S... Ground sensor.

Claims (1)

[Scope of utility model registration request] In a paddy field working machine in which a working device B is connected to a traveling machine body A so as to be able to rise and fall as well as drive rolling, a ground sensor S that rolls following the rice field surface is used.
A control mechanism D is provided to drive and roll the work device B based on the amount of rolling of the sensor S, and a biasing mechanism C is provided that provides a restoring force to the ground contact sensor S. A paddy field work machine configured so that the biasing force of mechanism C can be changed and set.