JPH025690Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is based on a seedling planting section that is attached to the traveling aircraft so that it can be raised and lowered by a drive mechanism, and in which a plurality of ground floats arranged in parallel in the lateral direction of the aircraft are biased downward. The control section of the drive mechanism and the grounding float are connected to each other based on the detection result of the height of the seedling planting part of the grounding float. The present invention relates to a structure for lifting and lowering a seedling planting part of a rice transplanter, which is provided with a mechanical interlocking mechanism that interlocks the operating part so that the operating part is automatically operated so that the detection result is within a set range.

In the above-mentioned seedling planting section lifting/lowering operation structure, conventionally, all of the grounding floats have been made capable of being vertically swung individually, and in order to allow each float to fully demonstrate its soil leveling function, the above-mentioned interlocking operation has been made. The mechanism was configured such that only one of the grounding floats was a sensor float, and the operating section of the drive mechanism was automatically operated based on the detection result of the height of the seedling planting section of this sensor float. Therefore, elevation control is performed by detecting local irregularities that exist only in the area where the sensor float touches the ground, and the planting depth of the seedling planting device that corresponds to non-sensor floats is changed unevenly, causing the overall It had the disadvantage of being either shallowly planted or deeply planted.

As an example of a means to eliminate such drawbacks,
It is also possible to use the left and right end floats as independent sensor floats, and calculate the average of their detection results using an appropriate means. A mechanism for transmitting information to the operating section is required, which has the disadvantage that the interlocking mechanism becomes structurally complex.

In view of the above-mentioned circumstances, the present invention has been developed in such a way that the soil leveling function of each grounding float can be fully demonstrated, and the interlocking mechanism can be constructed with a simple structure. By making it difficult for changes in the planting depth to occur, it is possible to keep the planting depth constant with high accuracy while being economically advantageous.Furthermore, by effectively utilizing the configuration for this purpose, it is possible to change the planting depth. The purpose is to make it possible to easily configure a structure that can be easily performed.

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, a seedling planting section 5 is placed at the rear of a traveling vehicle having a pair of left and right driving front wheels 1, 1 for steering and rear driving wheels 2, 2, and the seedling planting section 5 is vertically swung by a hydraulic cylinder 3. The rice transplanter is equipped with an operable link mechanism 4 that allows the rice transplanter to be raised and lowered freely, and is configured to transmit rotational power from the traveling body to the seedling planting section 5, thereby constructing a riding rice transplanter capable of planting four rows. .

2 parallel to the seedling planting section 5 in the lateral direction of the machine body.
Ground floats 6a and 6b are provided.
In each of the grounding floats 6a and 6b, as shown in FIGS. 2 and 3, a bracket 11 erected on the rear end side is attached to the transmission case 8 so as to be swingable up and down by a rotating shaft 12. A spring 14 is actuated on the rotating shaft 12, and is pivotally connected to the arm 13a or 13b, and also biases both the arms 13a and 13b downward, thereby biasing both the floats 6a and 6b integrally downward. , both of the grounding floats 6a and 6b are swung up and down individually around the axis _P1 on the rear end side in a state in which they are biased downward by their own weight so as to separately level the ground at two rows of seedling planting locations. It is connected to the seedling planting part 5 by a rotating shaft 12 and arms 13a, 13b so as to move up and down integrally with the seedling planting part 5 while being biased downward.

Control valve 1 of the fluid pressure cylinder 3
A swingable operating member 16 is attached to the control valve 5, and the control valve 1 is attached to the operating member 16.
5 is attached with a spring 17 that biases the seedling planting part in the raised position, and the operating member 16
The member 19 interlocked with the operation wire 18 is
A lever 20, which is attached to the rotating shaft 12 so as to be relatively rotatable and also extends integrally and rotatably from the rotating shaft 12, is locked to the valve-side interlocking member 19, so that the valve-side interlocking member 19 and the rotating shaft 12 are connected to each other. The control valve 15 is configured to rotate together, and based on the detection result of the height of the seedling planting part of both grounding floats 6a and 6b, the control valve 15 is automatically operated so that the detection result is within the set range. Both grounded floats 6a, 6b and control valve 15 for operation
A mechanical interlocking mechanism 21 is constructed. That is, when the height of the seedling planting part of both the grounding floats 6a, 6b is within the set range, both the grounding floats 6a, 6
When the control valve 15 is maintained in the neutral position by the balance between the descending force of b and the biasing force of the spring 17, and when the pair of transmission case 8 rises beyond the set range, the control valve 15 is moved by the spring. 17, the seedling planting part is operated to the raised position, and further, when both the grounding floats 6a, 6b descend beyond the set range and the transmission case 8 descends, the control valve 15 causes the seedling planting part to be planted by the downward force of both the grounding floats 6a, 6b. It is designed so that it can be operated to the lowered position.

Therefore, regardless of changes in the depth of the plow or changes in the unevenness of the mud surface in the direction of movement of the machine and in the lateral direction of the machine, the height of the seedling planting section 5 relative to the mud surface is maintained within the set range, and the seedling planting depth is maintained. It is designed so that you can work while keeping the height almost constant.

In the interlocking mechanism 21, the lever 20
can be disengaged from the valve-side member 19 by bending the base spring plate portion 20a, and is configured to enable relative rocking between the valve-side interlocking member 19 and the rotating shaft 12,
By selecting a plurality of lever locking notches arranged in parallel on the valve-side interlocking member 19, the relative posture of the valve-side interlocking member 19 and the rotating shaft 12 when the relative rocking is fixed can be changed, and the control Both grounded floats 6a in the neutral state of the valve 15,
It is configured such that the mounting height of the seedling planting part 6b to the seedling planting part 5 can be changed. In other words, the lever 20 is applied to a plurality of notches to change and set the planting depth to be maintained. The lever 22 shown in FIGS. 2 and 3 is operated by gripping the lever 20 to swing the contact portion 23 against the valve side interlocking member 19 when removing the lever 20 from the valve side interlocking member 19. 20 is for pushing out from the notch.

The lever 20 is configured such that a swinging member integrally extends from the rotating shaft 12 so as to be able to swing freely, and is removably inserted into the swinging member and the valve-side interlocking member 19 . It can be changed to a lock pin configured to be inserted selectively into multiple pin holes arranged in parallel on the swing member, and these can be used to release the relative swing between the valve side interlocking member and the float side interlocking member. The fixing mechanism 20 is generally referred to as a fixing mechanism 20 that can be fixed freely and can change the relative posture when both members are fixed in relative swing.

The fluid pressure cylinder 3 can be replaced with a motor or the like, and these are collectively referred to as a drive mechanism 3, and the control valve 15 is referred to as an operating section 15.

In addition, in the case of a 5-row or 6-row rice transplanter with three ground floats installed in parallel, all the floats are connected so that they move up and down integrally with respect to the seedling planting section, and these ground floats It is preferable to carry out the method by detecting the height of the seedlings.

In summary, the present invention, in the above-mentioned structure for lifting and lowering the seedling planting section of the rice transplanter, connects all of the grounding floats 6a and 6b so as to integrally move the seedling planting section up and down, and The mechanism 21,
The operating section 15 is configured to be operated based on the detection result of the height of the seedling planting section of the grounding floats 6a and 6b that move up and down together, and in the interlocking mechanism 21, the grounding float side interlocking member 12 and the operating section The side interlocking member 19 is provided so as to be relatively swingable, and the fixing mechanism 20 against the relative swinging of both the interlocking members 12 and 19 is released, and both the interlocking members 12 and
No. 19 is characterized in that it is provided in a state where the relative posture can be changed when the planting swing is fixed.

In other words, by each of the grounding floats 6a and 6b individually swinging up and down, each grounding float 6
Although the ground leveling function of a and 6b can be fully demonstrated, all the grounding floats 6a and 6b
are connected so as to move up and down integrally, and the elevation is controlled based on the detection results of the height of the seedling planting part, so the detection results of all the sensor floats 6a and 6b are not averaged. Although the structure of the interlocking mechanism 21 can be easily configured as in the conventional one, even if there are local unevenness in the left and right direction of the fuselage, some sensor floats 6a or 6b may
Even if the float 6b or 6a tries to rise or fall, its displacement is blocked by the remaining float 6b or 6a, so that stable elevation control can be performed with less influence from local unevenness. As a result, we have been able to provide a plant that can align the planting depth with extremely high accuracy, both at a low cost and because the soil leveling is performed reliably and the elevation control is performed with high accuracy.

Furthermore, according to the above configuration, both interlocking members 12,
It becomes possible to change the height of the seedling planting part of all the grounding floats 6a, 6b in the neutral state of the operation part 15 at once by simply changing the relative posture when the relative rocking of the controller 19 is fixed. Interlocking member 1
2 and 19 so as to be able to swing relative to each other, and by simply providing the fixing mechanism 20, it was possible to construct a plant with a simple structure in which changing and setting of the planting depth to be maintained can be easily performed.

[Brief explanation of the drawing]

The drawings show an embodiment of the structure for lifting and lowering the seedling planting part of the rice transplanter according to the present invention, in which Fig. 1 is a side view of the riding rice transplanter, Fig. 2 is a side view of the interlocking mechanism, and Fig. 3 is the float mounting part. FIG. 3... Drive mechanism, 5... Seedling planting section, 6a, 6b
...Grounding float, 12...Float side interlocking member, 15...Operation section, 19...Operation section side interlocking member, 20...Fixing mechanism, 21...Interlocking mechanism, P ₁
...Axis core.

Claims (1)

[Scope of utility model registration request] A plurality of grounding floats 6a, 6b arranged in parallel in the lateral direction of the aircraft are biased downward to the seedling planting section 5, which is attached to the traveling aircraft so that it can be raised and lowered by a drive mechanism 3, and each float is placed on the rear end side. In addition to being provided in a state of vertically swinging around the axis _P1 , the operating section 15 of the drive mechanism 3 and the grounding floats 6a, 6b are
A mechanical interlocking mechanism 21 is interlocked so that the operation section is automatically operated based on the detection result of the height of the seedling planting part of the grounding floats 6a and 6b so that the detection result is within a set range. This is a structure for raising and lowering the seedling planting part of a rice transplanter, in which all of the grounding floats 6a and 6b are integrally connected to raise and lower the seedling planting part, and the interlocking mechanism 21 is
The operating section 15 is configured to be operated based on the detection result of the height of the seedling planting section of the grounding floats 6a and 6b that move up and down together, and in the interlocking mechanism 21, the grounding float side interlocking member 12 and the operating section The side interlocking member 19 is provided so as to be relatively swingable, and the fixing mechanism 20 against the relative swinging of both the interlocking members 12 and 19 is released, and both the interlocking members 12 and
19. A structure for raising and lowering a seedling planting part of a rice transplanter, characterized by being provided in a state where the relative posture can be changed when the relative rocking is fixed.