JPH0160210B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a structure in which the float is pivotally supported to be vertically swingable about the rear end side as a fulcrum, and is provided on the lateral side with the planting mud surface leveling part positioned above the bottom of the float. This article relates to a lift control float for rice transplanters.

As shown in FIG. 8, the path of the float is such that the planting mud surface leveling portion of the float 31 forms a concave K on the side of the mud surface H leveled by the bottom of the float.
is formed, and as a result, after the float has passed, the mud on the planting mud surface fills the recess K.
Due to the internal flow, there was a risk that the posture of the planted seedlings would be greatly disturbed, such as causing the seedlings to fall over.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to suppress the disturbance of the posture of planted seedlings without impairing the function for lifting and lowering control by adding a simple modification to the float. The point is to make it so.

The present invention provides the aforementioned lift control float for a rice transplanter, in which a concave groove for flowing muddy water is provided at the bottom of the float, extending from the front end or a portion near the front end to the rear end, and from the width of the portion near the front end. It is also characterized by being formed with a larger width at the rear end.

Next, the effects of the characteristic configuration of the present invention will be described.

In other words, the muddy water located at the front of the float is made to flow through the muddy water flow groove formed at the bottom of the float into the path of passage at the bottom of the float, that is, into the recess formed on the side of the planting mud surface. Since the recesses can be filled, it is possible to suppress as much as possible the mud on the planting mud surface from flowing into the recesses after the float has passed.
Moreover, according to the present invention, the groove for flowing muddy water is formed so that the width at the rear end is larger than the width at the front end, so that the float can swing vertically even in soft fields. While avoiding a decrease in the ground contact area of the front end of the float, muddy water is discharged at the rear end of the float with as wide a width as possible, so if the ground contact area of the front end of the float decreases, it will become soft. It is possible to prevent the inconvenience of making it difficult to properly swing the float up and down in difficult fields, and to enable the float to swing properly for raising and lowering control. By discharging a large amount of muddy water into the recess, the recess can be filled as quickly as possible.

In the end, we have obtained a lift control float for a rice transplanter that can be used more conveniently by eliminating the above-mentioned disadvantages without adversely affecting the lift control.

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

As shown in FIG. 1, at the rear of the vehicle body, which is equipped with left and right front wheels 1, 1, left and right rear wheels 2, 2, an engine 3, a driver's seat 4, etc., there is a slanted seedling stand 5 that is reciprocated horizontally with a constant stroke; The four planting claws 6 take out one seedling at a time and plant it in the field while circulating up and down along the lower end row of pine-shaped seedlings placed on the seedling table 5. A seedling planting device 7 is provided, and is configured to sequentially plant seedlings as the aircraft advances.

The seedling planting device 7 is connected to the vehicle body via a quadruple link mechanism 8 so as to be movable up and down in a parallel position, and a hydraulic cylinder 9 is provided for raising and lowering the link mechanism 8 with respect to the vehicle body, Also,
The seedling planting device 7 is configured to be able to be raised and lowered relative to the vehicle body by extending and contracting the hydraulic cylinder 9.

As shown in FIGS. 2 to 5, three floats 10, 10A, and 10A whose front end portions are sloped forward for leveling the mud surface for planting seedlings are lined up in the width direction of the vehicle body, and The rear ends of the floats 10 are provided to be pivoted about the horizontal axis X relative to the seedling planting device 7, and the front ends of each float 10 are provided relative to the seedling planting device 7 in a state that allows vertical movement thereof. Connecting bending link 1
1, 11A, and 11A are provided. The central float 10 of the floats 10... is configured by:
The planting mud surface leveling parts S and S are provided on both sides of the float in a state that they are located above the bottom of the float, and a groove T for flowing muddy water is provided at the bottom of the float, extending from the front end or a point near the front end to the rear end. condition, and the width L at the rear end is wider than the width L at the front end.
It is formed in such a way that it becomes large. Also, a side float 10A on the lateral side of the floats 10...
To configure this, a notch R for passing through the planting claw is formed in a U-shape in plan view with an opening at the rear end, and a groove U for flowing muddy water is formed at the bottom of the front end side of the float. The float is formed so as to communicate with the inside of the notch R, and the bottom surface of the front end of the float is formed in a shape including a steeply sloped surface portion Wa from the front toward the rear and a surface portion Wb that is more gently sloped, It is designed to suppress muddy water from being forced to flow laterally.

As shown in FIG.
A spring 12 is provided to act on the bending/extending link 11, and a swinging operation arm 14 is provided to act on the bending/extending link 11, and a swinging operation arm 14 is connected to the control valve 13, which switches the operating state of the lifting hydraulic cylinder 9. The control valve 13 is connected to the link 11 via a wire 15 so that it can be oscillated, and when the oscillation position of the float 10 relative to the seedling planting device is within the appropriate setting range, the control valve 13 is connected to the hydraulic cylinder 9. In the lifting/lowering stop state, which stops the operation of the
When the rise is out of the proper range, the control valve 1
3 to the hydraulic cylinder 9 to raise the seedling planting device 7, and when the lowering is out of the proper range, the control valve 13 is activated to shorten the hydraulic cylinder 9 to raise the seedling planting device 7. 7 can be automatically switched to a state where it is lowered.
The swinging position of the float 17 relative to the seedling planting device is automatically maintained within a set range to maintain a constant planting depth.

As shown in FIG. 7, the lateral center portion of the seedling planting device 7 is pivoted to the rear end portion of the four-link mechanism 8 so as to be swingable around the longitudinal axis Y, and the seedling planting device 7 is A spiral telescopic rod 16 for swinging the device 7 relative to the four-link mechanism 8 is provided so as to be rotatably operated by an electric motor 17. As shown in FIGS. 5 and 6, a reed-type starting switch 18a for forward rotation and reverse rotation for the motor 17,
18b is provided so as to be operated by a magnetic body 21 that moves up and down at a constant distance back and forth from the switches 18a and 18b along guide rods 20 and 20 supported on the mounting member 19 thereof, and the left side The rod 22 pivoted near the pivot base of the flexible link 11A with respect to the float 10A is connected to the magnetic body 21.
The switch 18 is configured to maintain the vertical position of the left float 10A relative to the seedling planting device within a set range, and is urged downward by its own weight.
The seedling planting device 7 is configured to automatically roll the seedling planting device 7 relative to the vehicle body based on the information of A and 18A.

More specifically, when the vertical position of the left float 10A for the seedling planting device is at the same height as the vertical position of the central float 10 for the seedling planting device, the seedling planting device 7
The ground posture as seen in the front and back directions is a proper posture in line with the field scene, and whether or not it is in the proper posture is detected by the vertical fluctuation of the left float 10A with respect to the central float 10, and the proper posture is maintained. By performing rolling control to maintain the planting depth, the planting depth of each of the four planting claws 6 is made constant.

In addition, reference numeral 23 in FIG. 3 indicates the control valve 13 which is biased toward the lowering operation by the central float 10.
This is a manual lift lever that locks and swings the spool while being lifted by a locking arm 30, and has a lift position E, a lift stop position N, a drop position D, and a position for automatic operation by the control valve 13. It is configured so that it can be switched between A and A.

The lift control float 10 of the present invention can be applied to various types of rice transplanters.
The specific structure of the elevation control can be changed in various ways, such as detecting the vertical swing position of the robot with an electric switch and operating the drive mechanism for the elevation operation based on the detected information.

[Brief explanation of drawings]

Fig. 1 is a side view of the riding rice transplanter, Fig. 2 is a schematic plan view of the rear part of the machine, Fig. 3 is a schematic diagram showing the elevation control structure, Fig. 4 is a sectional view taken along the - line in Fig. 3, and Fig. 5 is a schematic diagram showing the lifting control structure. The figure is a side view showing the mounting structure of the side float, Figure 6 is a view taken along the - line in Figure 5,
Figure 7 is a front view showing the rolling operation structure; Figure 8 is a front view showing the rolling operation structure;
The figure is a rear view showing a conventional example. S...Mud surface leveling part for planting, T...Ditch for flowing muddy water, l, L...Horizontal width.

Claims (1)

[Claims] 1. An elevation control float for a rice transplanter, which is pivotably supported to be vertically swingable about the rear end side as a fulcrum, and is provided on the lateral side with the planting mud leveling section S positioned above the bottom of the float. , groove T for muddy water flow,
It is characterized in that it is formed on the bottom of the float in a state extending from the front end or a part near the front end to the rear end thereof, and in such a state that the width L of the rear end part is larger than the width L of the part near the front end. Elevation control float for rice transplanters.