JPS641085B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a planting section stabilizing device for a rice transplanter that controls pitting movement (swinging in the front and back direction) of the planting section in accordance with the hardness and softness of topsoil.

[Conventional technology]

In general, the safety of the planting area where seedlings are planted changes depending on the hardness and softness of the topsoil; when the topsoil is soft, the ground pressure of the float supporting the planting area increases, and conversely, when the topsoil is hard, The ground pressure of the float becomes smaller.

[Problems to be Solved by the Invention] Therefore, the stability of the planting area against pitting movement (swinging in the front and rear directions) and rolling movement (swinging in the left and right directions) changes depending on the hardness and softness of the topsoil. If the ground pressure changes depending on the hardness and softness of the topsoil, it is not only impossible to maintain a constant planting depth, but also the seedlings cannot be planted uniformly.

[Means and actions to solve problems]

In view of this, the present invention includes a topsoil hardness/softness detection sensor that is rotatably attached in the front-back direction to a float supporting a planting section in which seedlings are planted, and detects whether the topsoil is hard or soft; and a pitching control member that controls pitching movement that is a front-back shaking, and the pitching control member is interlocked with the rotation of the topsoil hardness/softness detection sensor,
When the topsoil is soft, the pitching control member increases the force supporting the planting part, and when the topsoil is hard, the supporting force is weakened, thereby controlling the pitching movement according to the hardness or softness of the topsoil, This maintains the stability of the planted area.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, an engine 2 is mounted on the upper front part of a car body 1, a front wheel 3 is attached to the lower front part of the car body, and a chain case 4 extends rearward from approximately the center of the car body 1. A rear wheel 5 is attached to the rear end. A driver's seat 6 is formed in the upper center of the vehicle body 1, and the driver's seat 6 is provided with a steering wheel 7 and a seat 8.
A planting section 1 is attached to the rear of the vehicle body 1 via a link mechanism 9.
0 is attached so that it can move up and down. The link mechanism 9 has an upper link 11 and a lower link 12, a vertical link 13 that connects the rear ends of the upper and lower links 11 and 12, and a connecting link 14 that hangs down from the front end of the upper link 11, The lower end of this connecting link 14 is connected to the tip of a piston rod of a hydraulic cylinder C. The planting section 10 has a float 15, and a planting section frame 16 is supported on the float 15. Further, a seedling tank 17 is supported diagonally on the planting section frame 16, and a seedling tank 17 is supported diagonally on the planting section frame 16.
6 is connected to the vertical link 13 via the rolling shaft 18.
is connected to the bottom end of. At the front part of the float 15, there is a topsoil hardness/softness detection sensor 1 that rotates in the front and back direction depending on the hardness/softness of the topsoil.
9 is attached by a shaft 20, one end of a wire W is attached to one end of this detection sensor 19,
This wire W passes through the guide fitting 22 of the support plate 21 fixed to the tip of the float 15, extends to the guide fitting 24 of the support plate 23 fixed to the lower surface of the upper link 11, and further extends through the guide fitting 24. It passes through and is connected to one end of the pitching control spring 25. The pitching control spring 25 is branched into two as shown in FIG. 3b, and the other end of each is fixed to both ends of the vertical link 13. A long hole 13a is formed in the vertical link 13, and a pin 11a of the upper link is inserted into this long hole 13a.
is engaged, and the vertical link 13 rotates due to the tension change of the pitching control spring 25, so that the planting section 10 is slightly rotated up and down via the rolling shaft 18. Next, the effect will be explained. When the topsoil is soft, the detection sensor 19 rotates clockwise in the diagram to increase the tension of the pitching control spring 25 because the resistance of the topsoil is low. Therefore, the planted portion is lifted by the pitching control spring, and the pitching is suppressed, and the ground pressure of the float 15 is reduced. Conversely, when the topsoil is hard, the detection sensor 19 rotates counterclockwise in the figure to reduce the tension of the pitching control spring 25 because the resistance of the topsoil is large. Therefore, the force of the pitching control spring supporting the planted portion becomes weaker, and the ground pressure of the float 15 increases, thereby stabilizing the planted portion and suppressing its pitching. Next, other embodiments of the present invention will be described. In FIG. 2, a support rod 30 is attached to the front surface of the planting section frame 16, and a link 31 is attached to this support rod 30 for regulating the vertical movement of the front part of the float. Further, a hydraulic control valve 32 for controlling the expansion and contraction of the hydraulic cylinder C is attached to the middle part of the support rod 30. The lower end of the spool rod 33 of this valve 32 is attached to the upper surface of the float 15, and the upper and lower parts of the front part of the float are The valve 32 is switched by the movement. An L-shaped crank lever 34 is provided at the tip of the support rod 30 and is biased by a spring (not shown) so that it can rotate clockwise in the figure. A tension spring 35 is attached to the lever 34, and a wire 37 extending from the bent lower end of an operating lever 36 attached to the side of the seat 8 so as to be rotatable back and forth is connected to the upper end of the lever 34. Another wire 38 extends from the lower end of the operating lever 36, and the pitting control spring 25 is connected to the tip of the wire 38. In this example, when the topsoil is hard,
When the operating lever 36 is tilted forward, the tension of the pitching control spring 25 is reduced, and the tension spring 35 rotates the link 31 counterclockwise in the figure, pressing the front part of the float 15 against the topsoil. , due to slight irregularities in the topsoil, the hydraulic control valve 32
The switching sensitivity is made dull to prevent switching. Conversely, when the topsoil is soft, the operation lever 3
6 to the rear, each member operates in the opposite direction, and the pitching control spring 25 acts to lift the planting part, reducing the ground pressure of the float 15, and the switching sensitivity of the hydraulic control valve becomes sharp. Become. Even in this way, stable planting is possible. 3a and 3b, in addition to the pitching control spring 25, a rolling control spring 4 is also shown.
0 extends from a support plate 41 fixed on the vertical link 13 to both left and right sides of the planting section frame 16, and this rolling control spring 40 is connected to the detection sensor 19 by a wire 42. In this way, the rolling control spring 40 can also control the rolling of the planting section. Further, as shown in FIG. 4, the upper link 1
The support plate 50 attached to the lower end of 1 and the seedling tank 1
If two dual-purpose springs 51 for rolling and pitching control are stretched between the left and right sides of 7, and these dual-purpose springs 51 are connected to the detection sensor 19 via a wire 52, the two dual-purpose springs 51 can be connected to the detection sensor 19 via a wire 52. Spring 5
1 enables both rolling and pitching control. Furthermore, as shown in FIG. 5, it is also possible to combine the operating mechanism of the pitching control spring 25 shown in FIG. 1 with the switching sensitivity adjustment mechanism of the hydraulic control valve 32 as shown in FIG. In case, link 31
A tension spring 60 is provided between the upper end and the upper end of the detection sensor 19.

【Effect of the invention】

Since the present invention is configured as described above, it is possible to maintain the stability of the planting area by controlling the pitching movement while maintaining the appropriate ground pressure of the float in the planting area, regardless of changes in the hardness and softness of the topsoil. This has the effect that variations in planting depth are constantly reduced and uniform planting work is possible.

[Brief explanation of the drawing]

Fig. 1 is a side view of the rice transplanter according to the present invention, Fig. 2 is a side view of the rice transplanter according to the present invention;
3a, 4, and 5 are side views of a rice transplanter showing other embodiments of the present invention, and FIG. 3b is a side view of a rice transplanter showing other embodiments of the present invention.
It is a view taken in the direction of arrow A in figure a. 1... Vehicle body, 10... Planting section, 11... Upper link,
13... Vertical link, 16... Planting section frame, 19...
Topsoil hardness/softness detection sensor, 25...pitting control spring, 31...link, 32...hydraulic control valve, 36...operation lever, 40...rolling control spring, 51...combined spring, 60...tension spring.

Claims (1)

[Scope of Claims] 1. A topsoil hardness/softness detection sensor that is rotatably attached in the front-back direction to a float supporting a planting section in which seedlings are planted, and detects whether the topsoil is hard or soft; and a pitching control member that controls pitching motion, which is the shaking of the topsoil. A stabilizing device for a planting part of a rice transplanter, characterized in that the supporting force is strong, and the supporting force is weak when the topsoil is hard.