JPH0123085B2 - - Google Patents

Description

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

The present invention relates to a planting part stabilizing device for a rice transplanter for controlling the rolling movement of a planting part depending on the hardness or softness of topsoil.

[Conventional technology]

It is generally known that the stability of the planting area where seedlings are planted changes depending on the hardness and softness of the topsoil.

[Problem to be solved by the invention]

In other words, the degree to which the float sinks changes depending on the hardness and softness of the topsoil, and if the float sinks a lot when the topsoil is soft, it becomes difficult to roll (sway from side to side) the planting area, and the planting area will remain tilted. The planting depth of the left and right planting rows will change. Furthermore, when the topsoil is hard, if there are local protrusions (bulges) on the topsoil surface, the float is supported by these and causes rolling, making it difficult to accurately control rolling. In this way, unless the rolling resistance is increased and the local protrusions are strongly pressed to level the ground uniformly, the planting depth may change. In view of this, the present invention controls the rolling movement of the planting section according to changes in the hardness and softness of the topsoil, so that the planting section is always in constant contact with the topsoil, enabling stable planting. The purpose of the present invention is to provide a planting part stabilizing device for a rice transplanter.

[Means to solve the problem]

In order to achieve this object, the present invention includes a topsoil hardness/softness detection sensor 15 for detecting the hardness/softness of the topsoil, and a rolling control member for controlling rolling of the planting area by the topsoil hardness/softness detection sensor 15. The rolling control member is provided with a planting part 6 on the vehicle body 1 so as to be able to roll freely.The planting part 6 is pulled up strongly with a spring 21 to increase the tension of the spring 21, and the tension of the spring 21 is made weak without being pulled up strongly. The topsoil hardness/softness detection sensor 15 can be operated to change the rolling operating resistance.
and the spring 21 are controlled so that when the topsoil is soft, the rolling resistance is increased to make rolling difficult, and when the topsoil is hard, the rolling resistance is decreased to facilitate rolling. It is something to do.

[Effect]

With the above configuration, the planting area is accurately rolled according to the hardness and softness of the topsoil, and the planting depth of the seedlings is stabilized.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a chain case 2 projects rearward from the center of a vehicle body 1, a rear wheel 3 is attached to the rear end of the chain case 2, and a seat 4 is provided above the chain case 2. Further, a planting section 6 is connected to the rear part of the vehicle body 1 via a link mechanism 5 so as to be movable up and down, and the link mechanism has an upper link 7 and a lower link 8. A vertical link 9 is provided at the rear end of these upper and lower links 7 and 8, and a connecting link 10 is attached to the front end of the upper link 7.
The tip of the rod of the hydraulic cylinder 11 is attached to the tip of the rod. The planting section 6 has a planting section frame F, and this planting section frame F is supported by a float 12. A seedling tank 1 is installed diagonally in the planting section frame F.
3 is supported, one end of a rolling shaft 14 is attached to the front surface of this planting section frame F, and the other end is connected to the lower end of the vertical link 9. Near the float 12, a topsoil hardness/softness detection sensor 15 curved in an arc shape is pivotally mounted on a shaft 16 so as to be rotatable in the front and rear directions. Further, a support plate 17 is fixed to the tip of the float 12, a guide fitting 18 is attached to the support plate 17, and one end of the wire W is fixed to the upper end of the detection sensor 15 through the guide fitting 18. The other end of the wire W is connected to a rolling control spring 21 via a support plate 20 formed at the upper end of the vertical link 9 and a guide fitting 19 attached to the support plate 20. The rolling control spring 21 is connected to the support plate 2
0, and the tips thereof are fixed to the upper surface of the planting section frame F at appropriate intervals in the left and right directions. Next, the effect will be explained. If the topsoil is soft, the topsoil hardness/softness detection sensor 15
rotates clockwise about shaft 16. Therefore, the wire W, one end of which is connected to the upper end of the detection sensor 15, increases the tension of the rolling control spring 21. When the tension of the rolling control spring 21 as a rolling control member increases, the rolling motion of the planting section 6 is strongly regulated and the rolling sensitivity becomes dull, the float sinks less, and the planting section 6 tilts left and right less. The planting depth will become stable over time. Conversely, when the topsoil is hard, the topsoil hardness/softness detection sensor 15 rotates counterclockwise about the shaft 16 to weaken the tension of the rolling control spring 21, thereby weakening its rolling control action. Therefore,
The rolling sensitivity is sensitive and the float is propelled in contact with the topsoil surface, evening out local protrusions on the topsoil surface for stable planting. In this way, since the rolling motion is controlled by detecting the hardness or softness of the topsoil and changing the tension of the rolling control spring 21, rolling is performed appropriately regardless of changes in the hardness or softness of the topsoil, allowing stable planting. , and the planting depth is also constant. FIG. 3 shows another embodiment of the present invention. In this embodiment, the hydraulic control valve 23 that controls the expansion and contraction of the hydraulic cylinder 11 is switched in response to the rotation of the topsoil hardness/softness detection sensor 15. The tension of the spring 25 that adjusts the elasticity is changed. That is, a support rod 22 protrudes from the front surface of the planting section frame F, the upper end of the hydraulic control valve 23 is attached to the front end of the support rod 22, and the lower end of the spool rod of the hydraulic control valve 23 is connected to the float 12.
The hydraulic control valve 23 is attached to the upper surface of the float 12 so that the hydraulic control valve 23 is switched by the vertical movement of the float 12.
A link 24 is rotatably attached to the front end of the support rod 22, the lower end of the link 24 is pivotally connected to the upper surface of the float 12, and a spring 25 is connected between the upper end of the link 24 and the upper end of the topsoil hardness/softness detection sensor 15. The spring 25 biases the link 24 so that it can rotate clockwise about the front end of the support rod 22. If the topsoil is hard, the tension of the spring 25 will increase, and the lower end of the link 24 will strongly restrict the vertical movement of the float 12, so the switching sensitivity of the hydraulic control valve 23 will become dull and the tension of the spring 25 will increase. Switching will not occur due to unevenness. Conversely, when the topsoil becomes softer, the tension of the spring 25 becomes weaker and the switching sensitivity of the hydraulic control valve 23 increases. In this way, by changing the switching sensitivity of the hydraulic control valve 23 according to the hardness or softness of the topsoil, it is possible to effectively control the vertical movement of the planting portion corresponding to the hardness or softness of the topsoil.

【Effect of the invention】

Since the present invention is configured as described above, the rolling motion of the planting area can be controlled by detecting the hardness and softness of the topsoil, and when the topsoil is soft, the rolling sensitivity becomes dull and the float sinks deeper into the soil. Without a problem,
In addition, when the topsoil is hard, the rolling sensitivity becomes sensitive and the float is propelled in contact with the soil surface, and the planting area is always supported in a nearly constant state against the topsoil, allowing stable planting at a constant depth. This has the effect of making it possible to attach.

[Brief explanation of drawings]

Fig. 1 is a rear side view of a riding type rice transplanter according to the present invention, Fig. 2 is a perspective view of the planting section, and Fig. 3 is a side view of the rear part of the riding type rice transplanter showing another embodiment of the present invention. be. DESCRIPTION OF SYMBOLS 1... Vehicle body, 2... Chain case, 3... Rear wheel, 4... Seat, 5... Link mechanism, 6... Planting part, 7... Upper link, 8... Lower link, 9...
... Vertical link, 10 ... Connection link, 11 ... Hydraulic cylinder, 12 ... Float, 13 ... Seedling tank, 14 ... Rolling axis, 15 ... Topsoil hardness/softness detection sensor, 16 ... Axis, 17 ... Support board, 1
8, 19... Guide metal fitting, 20... Support plate, 21...
... Rolling control spring, 23 ... Hydraulic control valve, 2
4...link, 25...spring.

Claims (1)

[Scope of Claims] 1. A topsoil hardness/softness detection sensor 15 for detecting the hardness/softness of the topsoil, and a rolling control member for controlling rolling of the planting area using the topsoil hardness/softness detection sensor 15, the rolling control member being , a planting part 6 on the vehicle body 1
is provided so that it can be rolled freely, and this planting part 6 is connected to the spring 2.
1, the rolling operation resistance can be changed by pulling up strongly to increase the tension of the spring 21, and by not pulling it up strongly to weaken the tension of the spring 21. 21, when the topsoil is soft, the rolling operation resistance is increased to make rolling difficult to occur, and when the topsoil is hard, the rolling operation resistance is decreased to make rolling easier. Stabilizer for the planting section of the machine.