JPS62104613U - - Google Patents

Description

[Brief explanation of the drawing]

The drawings show an example of a rice transplanter according to the present invention, with Fig. 1 being a longitudinal side view showing the connection of the sensor float, mud hardness detection piece, and control valve, and Fig. 2 showing the relationship between the rocking fitting and the planting adjustment lever. Figure 3 is a front view of Figure 2, Figure 4 is a graph showing the biasing force adjustment range for the sensor float, Figure 5 is the relationship between the sensor float and the mud hardness detection piece. A side view showing another embodiment, FIG. 6 is an overall side view. 7A...sensor float, 8...seedling planting device,
15...Seedling planting device lifting/lowering drive mechanism, 17...First
Interlocking mechanism, 20...Biasing mechanism, 30...Mud hardness detection piece, 31...Human operating tool, A...First biasing force adjustment range, B...Second biasing force adjustment range.

Claims (1)

[Scope of utility model registration request] The sensor float 7A, which is pivotally supported to be able to move up and down with respect to the seedling planting device 8 and is urged in the downward direction by a single urging mechanism 20, and the seedling planting device elevating drive mechanism 15 are connected to the seedling planting device elevating drive mechanism 15. The seedling planting device 8 is configured to be able to be controlled up and down in order to maintain the attitude of the sensor float 7A relative to the seedling planting device 8 within a set range based on vertical displacement due to ground pressure fluctuations. In addition, a mud hardness detection piece 30 is provided that plunges into the mud and swings due to ground resistance as the aircraft travels, and as the mud hardness detection piece 30 swings as the ground resistance increases, the sensor The downward biasing force of the biasing mechanism 20 with respect to the float is automatically changed, and the downward biasing force of the biasing mechanism 20 is also artificially changed by the operation of the human operating tool 31 to improve the sensing sensitivity of the sensor float 7A. The rice transplanter is configured to be able to vary the soil hardness detection piece 30 on the movable attachment end 14A that changes the biasing force of the biasing mechanism 20.
and the human operating tool 31 are linked through the second and third interlocking mechanisms, so that the biasing force adjustment range by the mud hardness detection piece 30 can be changed in stages by the operation of the human operating tool, The mud hardness detection pieces 30, which have been changed to be close to each other by the operation of the human operating tool 31, have overlapping attachments in the latter half of the first biasing force adjustment range A and the first half of the second biasing force adjustment range B. This rice transplanter is configured such that the force adjustment range can be adjusted by operating a human operating tool 31.