JPS643328Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a ground leveling plate with a front upward sloping attitude that acts on the lateral side of the front end of a float whose front end bottom surface is formed in a front upward sloping shape. This invention relates to a soil preparation tool for a rice transplanter installed in a rice transplanter.

In the above-mentioned soil leveling tool, depending on the hardness or softness of the field to be leveled, the leveling plate is set so that the upper and lower positions of the float can be positioned higher in softer fields where the float sinks deeper into the mud. The ground plate has been supported so that its vertical position relative to the float can be changed and adjusted, but with conventional means, the attitude of the ground plate changes significantly, resulting in a decrease in ground leveling performance, and mud pushing. This resulted in some inconveniences, such as disturbing the posture of the already planted seedlings.

In other words, conventionally, methods have been proposed for adjusting the ground leveling plate in vertical swing using its front end as a fulcrum, and means for adjusting the leveling plate in parallel vertical movement without changing its longitudinal position. , due to the fact that the slope of the ground leveling plate changes as it moves up and down, it is always difficult to level the ground as desired, and in the latter case, although the inconvenience caused by the former method can be avoided, The more the ground leveling plate is moved upward, the more the float protrudes forward and downward from the ground leveling plate, resulting in a large recess formed by the leveling plate and the float portion located forward of it. As a result, the flow of mud worsened, making it easy for mud to be pushed as the aircraft advanced.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to maintain the vertical position of the ground leveling plate relative to the float while maintaining a constant inclination to the ground and suppressing mud pushing. There is a support point that allows you to change and adjust.

The structure of the present invention is characterized in that, in the above-mentioned soil leveling tool for a rice transplanter, the leveling plate is supported so that its vertical position relative to the float can be changed and adjusted by vertical movement of the leveling plate along the inclination direction. .

In other words, by moving the ground leveling plate up and down along its inclination direction, the vertical position of the ground leveling plate with respect to the float can be changed and adjusted, so that the slope of the ground leveling plate relative to the ground can be maintained constant and good ground leveling can be achieved at all times. In addition, even if the position of the ground leveling plate is changed to the upper side, the amount of protrusion of the float from the ground leveling plate to the front and downward side does not become large, and mud pushing can be avoided. As a result, the above-mentioned inconveniences were avoided and it became possible to use it even better.

Hereinafter, embodiments of the present invention will be described in detail with reference to illustrative drawings.

A seedling planting device 6 is linked to the rear part of a traveling vehicle body in which wheels 1 and 2 are mounted on front and rear wheels, and a control unit 3 is arranged, through a three-point linkage mechanism 5 in which a lift cylinder 4 is interlocked and can be driven up and down. They are connected to form a 4-row riding rice transplanter.

At the lower part of the seedling planting device 6, there are side floats 8, 8 for leveling the ground for one planting claw 7 on both left and right sides, and two side floats 8, 8 for leveling the ground for the planting claws 7, 7 between the floats 8, 8. A central float 9 is provided for use. Then, the bottom surface of the front end of each float 8, 8, 9 is formed to have an upward slope,
The horizontal axis of each float 8, 8, 9 at the rear end
It is pivoted around the periphery so that it can swing up and down, and the front end can be moved up and down to follow the unevenness of the mud surface, thereby making it possible to level the ground well.

Each of the front wheels 1, 1 is provided with a protruding lug 10 spaced at a predetermined interval in the circumferential direction and having a small protrusion in both the radial direction and the left-right direction of the vehicle.

Propulsion lugs 11 are provided on each of the rear wheels 2 and 3 at a predetermined interval in the circumferential direction and protrude only toward the inside of the body, and the propulsion lugs 11 are adjacent to each other in the circumferential direction. Auxiliary lugs 12, which protrude by a small amount both in the radial direction and in the left-right direction of the machine body, are provided in each space. Further, auxiliary wheels 13, 13 can be detachably attached to the lateral outer sides of the rear wheels 2, 2, respectively.

The ground leveling plates 14, 15, which have a front upwardly sloping posture that level the ground at both lateral side portions of the front ends of the side floats 8, 8, are bolted to the crimp flange portions 16, 16 when blow molding the floats 8, 8. The bolts are detachably connected to the fixed plate-shaped body 32 in a state close to the floats 8, 8, so that the trail of the rear wheels 2 and the trail of the auxiliary wheels 13 can be leveled. There is.

The bolt insertion holes 17 of the ground leveling plates 14 and 15 are
The ground leveling plates are formed into elongated holes extending in the longitudinal direction, so that the vertical position of the leveling plates 14 and 15 relative to the float can be changed and adjusted by vertical movement of the leveling plates 14 and 15 along the inclination direction.

As shown in FIG. 4, the front end of the central float 9 is attached to a bracket 18 fixed to the seedling planting device 6.
are connected to each other via a bendable and extensible bi-folding link mechanism 19 so as to be vertically movable within a certain range. and,
A spring 20 that biases the center float 9 downward is provided to act on a link mechanism 19, and a swing arm 22 of a control valve 21 and a link mechanism 19 that switch the operating state of the lift cylinder 14 are provided.
are interlocked and connected by a release wire 23.

When the swing position of the central float 9 for the seedling planting device is within the appropriate setting range, the control valve 21
The control valve 21 is set to a lifting stop state in which the operation of the cylinder 4 is stopped, and when the rising speed is out of the proper setting range, the control valve 21 is set to a state in which the cylinder 11 is extended and the seedling planting device 6 is raised. When the drop is out of the range, the control valve 21 is automatically switched to a state in which the hydraulic cylinder 4 is shortened and the seedling planting device 6 is lowered, and the center float 9 is moved to a position where the seedling planting device 6 is lowered. The planting depth is stabilized by automatically maintaining the swing position of the attachment device within a set range.

In short, the height of the seedling planting device 6 relative to the mud is detected based on the vertical movement of the central float 9, and the seedling planting device 6 is automatically raised and lowered to stabilize the planting depth. It is configured.

Reference numeral 25 in the figure is a manual lift lever that locks and swings the control valve 21, which is biased toward the lowering operation by the central float 9, to the upper operation by the locking arm 24; The central float 8 is placed in the raised position (U), the lifting stop position (N), the lowered position (D), and the control valve 21 in a freely operable state as described above.
It is configured so that it can be switched to position (A) for automatic operation.

As shown in FIGS. 2 and 4, a spring 14 is used to move a back-and-forth swing type operating lever 29 that changes and sets the biasing force of the float downward biasing spring 20.
The U-shaped guide 26 attached in an inclined position to the lower part of the top link 5a of the three-point linkage mechanism 5 is interlocked and connected via a release wire 27 inserted therethrough, and the locking frame 28 of the lever 29 is
The lever 25 is provided in such a way that it can be unlocked by horizontally swinging the lever 25, and the central float 9 can be adjusted depending on the hardness or softness of the field.
The downward biasing force can be changed and adjusted.

To configure the control valve operating release wire 23, as shown in FIG. 5, the outer wire end fitting 30 is formed to have a different diameter so as to be non-rotatably engaged with the attachment target fitting 33. A fixing nut 31 is screwed onto the metal fitting 30 so that the wire 23 can be easily assembled.

The structure of the rice transplanter leveling tool of the present invention can be applied not only to riding rice transplanters but also to traveling rice transplanters.

In addition, in carrying out the present invention, leveling plates 14, 15
may be provided in a state where it is supported by the fuselage separately from the float 8.

[Brief explanation of the drawing]

Fig. 1 is a side view of the riding rice transplanter, Fig. 2 is a schematic plan view of the rear of the machine, Fig. 3 is a side view showing the leveling plate mounting structure, Fig. 4 is a side view showing the valve operation structure, Fig. 5 The figure is an exploded perspective view showing the wire attachment structure. 8... Float, 14, 15... Leveling plate, X...
...horizontal axis center.

Claims (1)

[Claims for Utility Model Registration] A ground leveling plate 14 or 15 with a front upward slope attitude that acts to level the ground at the lateral side of the front end of the float 8 whose front end bottom surface is formed in a front upward slope shape.
is a ground leveling tool for a rice transplanter provided close to the float 8, the leveling plate 14 or 15
A soil preparation tool for a rice transplanter, characterized in that it is supported so that its vertical position relative to the float can be changed and adjusted by vertical movement along the inclination direction. The float 8 is pivotally supported around the horizontal axis X of the rear end so as to be vertically swingable, and the ground leveling plate 14 or 15 is attached to the float 8 so as to be able to swing vertically together therewith. A soil leveling tool for a rice transplanter as set forth in claim 1 of the utility model registration claim.