JPH0216574Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is designed to maintain the grounding float and seedling planting device in the set attitude towards the ground regardless of the softness and hardness of the seedling planting soil. The ground rocking sensor is provided so that it can freely swing up and down around the core, and the front side is biased downward by a biasing mechanism, and the ground rocking sensor is attached to the seedling planting device in a downward biased state. The float is set in a mechanism that drives and lowers the seedling planting device with respect to the vehicle body, so that the biasing force of the biasing mechanism increases as the sensor moves upward. The present invention relates to a rice transplanter that is linked so as to maintain its ground attitude and to freely change its set ground attitude.

In the rice transplanter mentioned above, when the attitude of the ground float on the ground is changed in order to change the seedling planting depth, the relative height between the ground rocking sensor attached to the seedling planting device and the ground float will change accordingly. Because the position changes, the amount of penetration of the ground vibration sensor into the ground changes, and the detection sensitivity of the sensor changes every time the seedling planting depth changes.For this reason, in the past, the sensor The ground float downward biasing mechanism was manually adjusted to account for the change in detection sensitivity, but manual adjustment every time the seedling planting depth was changed was cumbersome, and it also took into account the change in the detection sensitivity of the ground vibration sensor. There was room for improvement, as it was extremely difficult to make adjustments and it was easy to make incorrect adjustments.

In view of the above-mentioned conventional situation, the present invention makes it possible to easily correct the detection sensitivity of the ground vibration sensor when changing the seedling planting depth by making reasonable improvements.
The purpose is to avoid erroneous adjustment operations and ensure efficient and smooth seedling planting work.

The characteristic configuration of the present invention is that, in the rice transplanter mentioned above, the sensor is attached to the seedling planting device so that its vertical position can be changed freely, and the vertical change of the mounting position of the sensor is performed in accordance with the change in the set ground attitude of the float. Accordingly, a linkage operation mechanism is provided to suppress changes in the amount of ground penetration of the sensor.

In other words, by automatically changing the vertical position of the ground vibration sensor relative to the seedling planting device in conjunction with the setting of the ground float for changing the seedling planting depth and the ground posture change operation, the seedling planting depth can be adjusted. This suppresses the change in the amount of ground penetration of the sensor caused by changes and keeps the detection sensitivity of the sensor constant, so it is no longer necessary to manually adjust the biasing mechanism for lowering the ground float each time the seedling planting depth is changed. This eliminates manual operations and also avoids erroneous adjustment operations caused by incorrect estimates of changes in sensor sensitivity. Overall, this improves the efficiency of seedling planting work and ensures smooth seedling planting work. It came to this.

Embodiments of the present invention will be described in detail based on illustrative drawings.

As shown in FIG. 1, a vehicle body equipped with a pair of left and right rear propulsion wheels 1b and a pair of left and right front propulsion wheels 1a that can be freely steered is provided with a tower driving section 2 and a front driving section 3. , a planting mechanism case 4 that receives driving force from the vehicle body; a tilted seedling rack 5 that is laterally reciprocated with a constant stroke by variable speed power; and a seedling placed on the tilted seedling rack 5 while circulating vertically. A plurality of planting claws 6 that sequentially plant seedlings one by one along the lower end row, and three soil leveling floats 7 arranged in parallel in the lateral direction of the vehicle body.
A seedling planting device 8 equipped with a, etc. is attached to the rear end of the vehicle body via a link mechanism 9 and can be driven up and down by a hydraulic cylinder 10, and multiple rows of seedlings are planted as the vehicle body travels. It is configured as a riding rice transplanter.

To attach each of the soil leveling floats 7, 7a to the seedling planting device 8, as shown in FIGS. The floats 7, 7a are connected via waist-folding link mechanisms 11, 11a so as to be able to change their vertical positions, and the rear portions of each float 7, 7a are arranged in parallel to a horizontal rotation shaft 12 rotatably attached to the planting mission case 4. The floats 7, 7a are pivotally connected to the arms 13, 13a, and each float 7, 7a is configured to be vertically swingable around the rear side horizontal axis P, so that each float 7, 7a can be moved to follow the undulations of the mud surface. The floats 7, 7a are configured to smoothly slide on the mud surface as the vehicle travels. And each float 7,
The center float 7a is attached to the waist-folding link mechanism 11a of the center float 7a located in the center of the center float 7a.
A spring 14 that biases the front part downward is attached, and an operating part of a control valve 15 for a hydraulic cylinder 10 for raising and lowering the seedling planting device 8 and a hip-folding link mechanism 11a are attached.
The lower link of is interlocked with the wire 16,
Consequently, the control valve 15 is automatically operated based on the vertical swing displacement of the center float 7a around the rear horizontal axis P caused by the ups and downs of the mud surface, and the seedling planting device 8
By automatically controlling the elevation and lowering of the seedling planting device 8, the level of the seedling planting device 8 relative to the planting mud surface is maintained within a set range. Furthermore, center float 7
The ground rocking sensor 17, which is provided in front of a and can swing freely around a horizontal axis, and the center float downward biasing spring 14 are interlocked and connected via a rod 18 and a rocking arm 19, and the planting soil is By increasing the downward biasing force of the center float 7a by the spring 14 for harder soil based on the swing angle change of the ground swing sensor 17 caused by the softness and hardness of the soil, the difference in softness and hardness of the planting soil can be compensated for. Regardless,
The center float 7a, which serves as a planting level detection center, is configured so that it can always detect the undulations of the planting mud surface with a constant posture on the ground.

In order to ensure the minimum downward biasing force of the spring 14, the regulating member 22, which has an elongated hole 21 that engages with the connecting pin 20 between the swing arm 19 and the spring 14, is screwed in and out. 14 is provided so as to be freely changeable in its position in the longitudinal direction, and the locking action between the lower end of the elongated hole 21 and the connecting pin 20 prevents the ground rocking sensor 17 from swinging back to the front side beyond the set angle. 14, the minimum downward biasing force for the center float 7a is guaranteed, and the setting of the minimum downward biasing force can be changed by screwing the regulating member 22 forward and backward.

On the other hand, the rear part of each float 7, 7a is attached to arm 1.
A swing lever 23 for rotating the shaft is fixedly mounted on the swing shaft 12 supported via the shafts 3 and 13a, and a plurality of swing levers 23 are formed in lever holes 24 for guiding the swing system path of the swing lever 23. The locking action with the notch 24a allows the arm 1 to be freely swung and fixed in a plurality of swiveling positions.
By changing the swinging position and fixing the floats 7 and 13a, each float 7 and 7a can be raised and lowered relative to the seedling planting device 8, and the seedling planting depth of the planting claws 6 can be changed. It has been done. The front hip-folding link mechanism 11a of the center float 7a is connected to the planting mission case 4 side end, the ground swing sensor 17, and the rock that interlocks the ground swing sensor 17 and spring 14 together with the rod 18. The stay member 22a for the movable arm 19 and the regulating member 22 for ensuring the minimum urging force of the spring 14
are respectively pivotally supported or fixedly connected to one end side of a swinging member 25 which is pivotally connected to the planting mission case 4 so as to be swingable about the horizontal axis Q, and the other end of the swinging member 25 and the center float are connected to each other. 7a and the rear connecting arm 13a are interlocked and connected by a push/pull rod 26, and the swinging member 25 is swung as the center float 7a moves up and down with respect to the seedling planting device 8 due to the planting depth changing operation. Hip folding link mechanism 11
By raising and lowering the spring 14 and the center float 7a, the hip-folding link mechanism 1
The manual tension state of the wire 16 and the setting biasing force of the spring 14 by 1a are maintained in the state before the seedling planting depth change, so that the seedling planting depth changing operation does not affect the raising/lowering control of the seedling planting device 8. Similarly, when changing the planting depth of seedlings, the ground shaking sensor 17 can be moved by following the center float 7a and changing its vertical position.
The structure is such that the amount of ground penetration is kept approximately constant, and the detection sensitivity is always kept constant.

It should be noted that the specific mounting structure for attaching the ground vibration sensor 17 to the seedling planting device 8 so as to be able to change its vertical position can be modified in various ways. In order to suppress the change in the ground penetration amount of the ground shaking sensor 17, the seedling planting depth changing operation unit or each float 17, 17a is used to change the seedling planting depth and change the vertical position of the sensor 17. Various configuration changes are possible, such as mechanically linking the and ground vibration sensor 17 mounting structure using links, rods, wires, etc., or linking them using electrical or hydraulic linking mechanisms. These are collectively referred to as the linked operation mechanisms 25 and 26.

The present invention is intended for various types of rice transplanters, such as riding-type and walking-type rice transplanters.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the rice transplanter according to the present invention,
Figure 1 is an overall side view of the rice transplanter, Figure 2 is a side view showing the center float mounting structure, Figure 3 is a side view showing the side float mounting structure, and Figure 4 is partially omitted showing the soil leveling float mounting structure. FIG. 7a...Grounding float, 8...Seedling planting device, 1
0... Drive elevation operation mechanism, 14... Biasing mechanism, 1
7... Ground rocking sensor, 25, 26... Interlocking operation mechanism, P... Horizontal axis.

Claims (1)

[Scope of utility model registration request] The grounding float 7a is provided so as to be able to freely swing up and down around the horizontal axis P on the rear side thereof, and with the front side biased downward by the biasing mechanism 14, and is biased downward by the seedling planting device 8. The more the sensor 17 swings upward, the more the biasing mechanism 14 increases.
a mechanism 10 for driving and lowering the seedling planting device 8 with respect to the vehicle body in such a manner that the urging force of the seedling planting device 8 is increased;
The rice transplanter is a rice transplanter in which the float 7a is linked to the float 7a so that the float 7a can be maintained at a set attitude toward the ground, and the set attitude toward the ground can be freely changed, and the sensor 17 is connected to the seedling planting device 8. Coupling mechanisms 25 and 26 are provided so that the sensor 17 can be mounted so as to be vertically changeable, and to change the mounting position of the sensor 17 vertically so as to suppress a change in the amount of plunge of the sensor 17 into the ground as the set attitude of the float 7a changes. A rice transplanter that is characterized by: