JPH0739381Y2 - Float reference position measuring device in walking type paddy work machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a float reference position measuring device in a walking type paddy working machine such as a rice transplanter, a fertilizer applicator, and a seeder.

[Problems to be Solved by Prior Art and Invention] Generally, in this type of walking paddy work machine, in order to control the attitude of the machine with respect to the rice field, the machine is controlled by vertical movement of wheels based on vertical movement of a float provided on the machine. A hydraulic lifting mechanism for lifting and lowering is provided. By the way, in the above hydraulic lifting mechanism, it is necessary to make an adjustment so that the hydraulic valve is switched and operated at a predetermined float position.However, conventionally, while applying a scale or the like to the opposing portion of the machine body and the float to measure the float position. Since it is an adjustment work, it is necessary to work with at least two people, but there were also adjustment errors due to misreading of the scale, and adjustment accuracy was also a problem.

[Means for Solving the Problem] In view of the above-mentioned circumstances, the present invention was devised with the object of providing a float reference position measuring device for a walk-behind paddy working machine capable of eliminating these drawbacks. Thus, in a walk-type paddy working machine that operates a hydraulic lifting mechanism that raises and lowers the machine body by vertically operating wheels based on vertical movement detection of a float that is swingably mounted on the machine body, the float and the machine body are It is characterized in that a gauge body for measuring the reference position of the float with respect to the machine body is provided at the opposing portion by restricting swinging above the reference position of the float.

The present invention, with this configuration, enables the hydraulic lifting mechanism to be adjusted by one person and with high accuracy.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine body of a walk-behind rice transplanter, the traveling machine body 1 has an engine 2 at a front portion thereof, and a rear portion thereof has a seedling mounting table 3 at a rear portion thereof.
Members such as the driving handle 4 and the planting claws 5 are arranged as in the conventional case.

Further, in the center of the machine body 1, a main cylinder 6 for pitching control and a cylinder rod 6a of the main cylinder 6 are provided.
Rolling control sub-cylinder 7 arranged on the tip side of the
And are provided. Reference numeral 8 denotes a balance mechanism connected to the traveling wheels 9. The balance mechanism 8 has a connecting arm 8a having a central axis common to a pivotal support portion with the cylinder rod 6a, and a sub arm. It is locked to the operating pin 7a on the cylinder 7 side. The balance mechanism 8 is linked to the fact that the cylinder of the sub-cylinder 7 moves in the left-right direction based on the valve switching by the sensing operation of the rolling sensing float 10 described later.
Oscillates, whereby the left and right traveling wheels 9 are moved up and down in a contradictory manner to maintain the left and right posture of the machine body in a substantially horizontal state.

Reference numeral 11 denotes a valve mechanism that operates the cylinders 6 and 7, and the valve mechanism 11 detects the swinging movement of the main cylinder 6 and detects the swing of the main float 12 that is vertically swingably provided at the bottom of the machine body 1. Main valve 11
a and a sensing float 1 on each side of the main float 12
The sub-valve 11b for performing the above-described operation of the side cylinder 7 by the sensing operation of 0 is provided, but in the embodiment, the connection between the main float 12 and the main valve 11a is as follows.

That is, the upper end of the sensing link 13 whose lower end is coupled to the front end of the main float 12 is coupled to the sensing plate 14 with a buffer ammunition 13a interposed therebetween.
The sensing plate 14 is curved in a substantially U shape in a plan view, and pins 14c and 14d are vertically formed on one surface 14a fixed to the valve rod 11c.
4c and 14d are loosely fitted in the interchangeable portions 17a and 18a formed in the long holes of the operating plates 17 and 18 connected to the planting clutch wire 15 and the traveling clutch wire 16, respectively. When the planting clutch lever 19 and the traveling clutch lever 20 provided on the driving handle 4 (these levers are also used as hydraulic levers) are operated to the automatic control position, the pin 14
c and 14d are in a flexible state, which allows the sensing plate 14
Swings in response to the sensing swing by the main float 12,
The main valve 11a is switched.

On the other hand, 21 is a gauge body provided on the front end side of the machine body frame 1a, and the gauge body 21 is a support shaft 21a pivotally supported between left and right frames 1b constituting the machine body frame 1a.
In addition, a gauge portion 21b and a stopper portion 21c, which are bent in a substantially U-shape, are integrally formed in the radial direction so as to project. The gauge body 21 is normally held in the storage posture in which the gauge piece 21b is locked by the locking piece 22 provided on the side of the machine body 1, but when the gauge portion 21b hangs downward, the tip of the gauge portion 21b is the main body. By touching the upper surface of the float 12, the sensing reference position of the main float 12 can be measured. That is, in this embodiment, the length of the sensing link 13 is adjusted so that the main valve 11a is switched to the up side when the main float 12 moves up to the sensing reference position (a predetermined main float position with respect to the machine body). At this time, the length A of the gauge portion 21a is set so that the sensing reference position can be measured by setting the gauge body 21 as described above. On the other hand, when the stopper part 21c is in the hanging posture, it contacts the upper surface of the main float 12 and holds it at the lowest position, and in this state, the main valve 11a is switched to the lower side. As the wheels 9 rise to the upper limit position, the aircraft 1 is supported by the main float 12 at this time,
The wheels 9 separated from the ground are in a free state where they do not receive the load of the body. In other words, in this state, when the pin 24 is replaced in order to switch between Fukada and Asada at the connecting portion of the balance mechanism 8 and the connecting rod 23, the wheel 9 can be operated in a free state where it does not receive the load of the machine body. It is possible to perform the work alone and safely.

In the embodiment of the present invention configured as described above, when the switching position of the main valve 11a is adjusted, the gauge body 21
If the gauge portion 21b is set in a posture in which the gauge portion 21b hangs downward, the sensing reference position of the main float 12 can be measured by the tip of the gauge portion 21b contacting the upper surface of the main float 12. Therefore, the main valve 11a, which is switched based on the vertical movement of the main float 12, is used to control the lifting and lowering of the machine body 1,
When adjusting the switching position of 11a, the gauge reference body 21 provided on the side of the body 1 is set without measuring the sensing reference position of the main float 12 by applying a scale to the facing portion of the body 1 and the main float 12 as in the conventional case. Just by doing so, it will be possible to measure almost automatically. As a result, an operator for measuring the float position may be unnecessary, and it is possible for one operator to adjust the switching position of the main valve 11a.
Moreover, since the above-mentioned measurement is performed by the gauge body 21 coming into contact with the main float 12, it is possible to reliably prevent an adjustment error due to a misreading of the scale and to significantly improve the adjustment accuracy.

Further, in this embodiment, the gauge body 21 is provided with a stopper portion.
Since 21c is integrally provided and parts are commonly used,
It is not necessary to attach a stopper member separately, and the number of parts can be eliminated.

The present invention is not limited to the above embodiment,
For example, the gauge body can be used not only for the main float but also for the rolling sensing float. Further, it is needless to say that the gauge body may have no stopper portion or may have an L-shape in a side view as shown in FIG.

[Advantages] In summary, since the present invention is configured as described above, the valve switching position of the hydraulic lifting mechanism is adjusted while the lifting and lowering control of the machine body is performed based on the vertical movement detection of the float. In that case, the reference position of the float can be easily measured by restricting the swinging of the gauge body above the reference position of the float. Therefore, the reference position of the float can be measured almost automatically without applying a scale to the facing portion of the airframe and the float as in the past, and as a result, no operator is required to measure the float position. Therefore, it is possible to adjust the switching position by one operator. Moreover, since the above-described measurement is performed by the gauge body restricting the swing of the float, it is possible to reliably prevent an adjustment error due to a misreading of the scale and to significantly improve the adjustment accuracy.

[Brief description of drawings]

The drawings show an embodiment of a reference position measuring device for a float in a walking paddy working machine according to the present invention,
FIG. 1 is a side view of a walk-behind rice transplanter, FIG. 2 is a perspective view of a main part of a body attitude control mechanism, and FIGS. 3A and 3B are side views, a plan view and a main part showing the function of the present invention. 4A and 4B are respectively a plan view and a side view of a machine body frame showing another example. In the figure, 1 is a traveling body, 1a is a body frame, 6 is a main cylinder, 7 is a sub-cylinder, 8 is a balance mechanism, 11 is a valve mechanism, 12 is a main float, 13 is a sensing link, 21 is a gauge body, and 21a is The support shaft, 21b is a gauge portion, and 21c is a stopper portion.

Claims (1)

[Scope of utility model registration request] 1. A walk-type paddy working machine in which a hydraulic lifting mechanism for raising and lowering a vehicle body by vertically moving wheels is operated based on vertical movement detection of a float provided on the vehicle body so as to be vertically swingable. To the part where
A float reference position measuring device for a walkable paddy work machine, comprising a gauge body for measuring the reference position of the float with respect to the machine body by restricting swinging above the reference position of the float.