JPH057964B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention uses a rice transplanter to adjust the type of seedlings to be planted, such as young seedlings, medium-grown seedlings, and adult seedlings, or the degree of row spacing and spacing of planted seedlings. In addition, the present invention relates to an improvement of the seedling removal amount adjusting device of the planting device for adjusting the amount of seedlings to be planted. A seedling stand configured to be able to send out placed pine seedlings on the take-out port side, and a planting device with a planting claw for taking out the pine seedlings from the seedling take-out port, and a tip of the planting claw. The present invention relates to a seedling harvesting amount adjusting device for a planting device that is provided with a trajectory adjusting mechanism that changes the position of a moving trajectory in a seedling delivery direction.

[Conventional technology]

Conventionally, this type of device for adjusting the amount of seedlings removed by a planting device has been designed to: The position of the swinging fulcrum at the connection point is changed manually by rotating the screw shaft or pushing and pulling in the direction of the screw shaft axis, and the movement trajectory of the tip of the planting claw is aligned with the seedling take-out opening of the seedling stand. On the other hand, the position of the seedlings was changed back and forth in the direction of sending out the seedlings (see, for example, Japanese Patent Laid-Open No. 56-32909).

The method described in [1] above has been conventionally known.

According to this conventional technology, the movement locus of the planting claws is only visually measured and manually adjusted in advance before planting, and not only does this adjustment require skill, but also It was difficult to make internal adjustments or to perform frequent adjustment operations.

[Problem to be solved by the invention]

[2] As shown in FIG. 6, the applicant of the present invention, among the group of seedlings in the placed pine seedlings, contacts the seedlings located on the lower side in the feeding direction from the lower side in the feeding direction. A sensor 7 is provided to detect the relative position of the seedling with respect to the seedling stand 2 in the feeding direction, and the sensor 7 and the trajectory adjustment mechanism 5 of the planting claw 3 are adjusted based on the detection result of the sensor 7. The distal end movement locus b of the planting claw 3 is linked via an interlocking mechanism 8 that operates the locus adjustment mechanism 5 so that the position of the distal end movement locus b of the planting claw 3 is changed in the front-rear direction of the seedling feeding direction.

As described in [2] above, a previous application proposed a device that can automatically adjust the amount of seedlings to be taken based on the detection result of a sensor without manual operation.

This eliminates the need for skill and troublesome operation as in the past.
This allows adjustment to be made freely even during work, making it convenient to adjust the amount of seedlings taken.However, the present invention goes further and solves new problems that arise when using sensors in this way. This is an attempt to solve this problem.

In other words, when the seedling pedestal is moved to the end side in the lateral movement direction of the seedlings, and the number of remaining seedlings in the lateral movement direction of the pedestal pedestal decreases, the seedlings in the front row will be pushed down by the sensor coming into contact with the few seedlings. There was a problem that the sensor could not accurately detect the position of the seedling in this state.

An object of the present invention is to use a sensor that detects the position of seedlings to easily adjust the amount of seedlings taken without relying on manual operation, and without being affected by the amount of remaining seedlings in the direction of horizontal movement of the seedlings. The purpose is to make it configurable.

[Means to solve the problem]

The technical means of the present invention taken to achieve the above object is configured to be capable of reciprocating in the lateral direction, and to be able to send out the placed pine seedlings to the seedling take-out port each time the pine seedlings are located at the end of the reciprocating lateral movement. a seedling stand; and a planting device with a planting claw for taking out the pine seedlings from a seedling take-out port; The seedling harvesting amount adjusting device of the provided planting device is provided with the configurations described in [A] to [C] below.

[B] Among the group of seedlings in the above-mentioned placed pine seedlings, contact the seedlings located on the lower side in the feeding direction from the lower side in the feeding direction, and measure the relative position of the seedlings in the feeding direction with respect to the seedling tray. It is equipped with a sensor to detect it.

[B] The sensor and the trajectory adjustment mechanism operate the trajectory adjustment mechanism so that the tip movement trajectory of the planting claw is changed in position in the front-back direction of the seedling sending direction, based on the detection result of the sensor. They are linked via an interlocking mechanism.

[C] The interlocking mechanism is configured to operate the trajectory adjustment mechanism only at the initial stage of lateral movement of the seedling stand.

[Effect]

The effects of taking the above technical measures are as follows.

In other words, the trajectory adjustment mechanism, which is activated based on the result of the detection of the seedling position by the sensor, is activated only at the initial stage of the lateral movement of the seedling pedestal, and at the end of the lateral movement of the seedling pedestal, the trajectory adjustment mechanism is activated by the sensor. Since the trajectory adjustment mechanism is not activated based on the sensing result, when the seedling platform is in the initial stage of lateral movement in the lateral movement direction, the sensor contacts many seedlings and detects the position of the seedlings. When the seedling stand reaches the end in the lateral movement direction, the sensor detects a small amount of seedlings at that end, and even if the sensor pushes down the seedlings, the sensor in that state The seedling position detection signal from is ignored as an activation signal for the trajectory adjustment mechanism.

〔Effect of the invention〕

Due to the above effects, the effective detection period for seedling position detection by the sensor is set only during the initial period after the start of lateral movement, before the number of remaining seedlings becomes small, and there is a risk that the sensing operation by the sensor may become inaccurate. Since it is not affected by the sensing operation of the sensor at the terminal end in the lateral movement direction, the detection accuracy of the desired seedling position by the sensor is improved, and it is easy to accurately adjust the amount of seedlings to be taken.

Adjust the swinging moment (generally, in order to prevent swinging due to vibration etc., the swinging moment in the direction of sending out the seedlings and the swinging moment in the opposite direction are equal in magnitude) and a balance weight 9 for adjustment.
In addition, the seedling contact portion 7A of the sensor 7 is connected to the main body 7B.
The pine seedling A is pivoted to be swingable in the distance direction with respect to the bed A', that is, in the longitudinal direction of the seedling a, and is elastically biased to swing toward the bed A' side via the spring 10. There is.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

The pine seedlings A are capable of reciprocating in the lateral direction, and each time the pine seedling A is located at the end of the reciprocating lateral movement path, the pine seedling A is placed on the side of the seedling take-out port 1 formed on one side of the reciprocating lateral movement path.
A seedling stand 2 is provided with a rotary body 2A that sends out seedlings and is tilted to the ground, and in conjunction with the lateral movement of this seedling stand 2, the seedlings are passed through the seedling take-out port 1 from above to below. A planting mechanism 3 takes out the pine seedlings supplied to the seedling takeout port 1 and plants them by cyclically operating the planting claws 3a.
is provided to constitute a planting device for a rice transplanter, and a seedling amount adjustment device is provided to the planting device.

The seedling take-out port 1 is formed in a frame 4 that slidably supports the lower end portions of the seedling loading table 2 and the placed pine seedlings A.

The planting mechanism 3 circulates the planting arm 3A to which the planting claw 3a is attached via a drive crank arm 3B and a swing link 3C.

The seedling removal amount adjusting device positions the tip movement trajectory b of the planting claw 3a in the seedling sending direction on the seedling platform 2 by changing the swinging fulcrum R position of the swinging link 3C. a trajectory adjustment mechanism 5 for changing;
Among the group of seedlings in the placed pine seedlings A, the seedlings a are brought into contact with and pressed against the seedling a located on the lower side in the feeding direction, and are swung against the biasing force of the spring 6, thereby maintaining the swinging posture. a sensor 7 that detects the position of the seedling a in the feeding direction relative to the seedling stand 2;
Based on the sensor 7 detected by this sensor 7 and the detection result of this sensor 7, the planted nail 3a
an interlocking mechanism 8 that operates the trajectory adjustment mechanism 5 so that the tip movement trajectory b of the sensor 7 is positioned at a set position spaced a certain distance upward in the feeding direction with respect to the contact surface 7a of the sensor 7 to the seedling a; It is configured with the following.

The trajectory adjustment mechanism 5 includes a screw shaft 5A that rotates to move the fulcrum shaft 3b of the swing link 3C, and an electric motor 5B that rotates the screw shaft 5A in forward and reverse directions.

The sensor 7 has a contact surface 7a over the entire length of the reciprocating lateral movement path excluding the seedling takeout port 1.
It is formed by continuously forming .

The interlocking mechanism 8 swings in conjunction with the fulcrum shaft 3b. That is, a member 8A that swings in conjunction with the change in position of the tip movement locus b is provided, and a reed switch S for forward rotation and a reed switch S' for reverse rotation of the electric motor 5B are attached to this swing member 8A.
When the tip movement locus b is located at the set position with respect to the sensor contact surface 7a, both reed switches S,
When both S' are turned OFF and the tip movement locus b is located at a position on the upper side in the feeding direction than the set position, the forward rotation reed switch S, which moves the tip movement locus b in the lower side in the feeding direction, is turned ON. , installed so that when the tip movement locus b is located on the lower side in the feeding direction than the set position, the reversing reed switch S', which moves the tip movement locus b in the upper side in the feeding direction, is turned ON; It is detected whether the lateral movement of the seedling rack 2 is an initial lateral movement or not, and only at the initial stage of the lateral movement of the seedling rack 2, the electric motor 5B is turned on by turning on both reed switches S and S'. It is constructed with a check mechanism that allows this.

The restraining mechanism includes a first switch S1 that is turned on by being pressed by a cam 9 attached to the seedling resting table 2 when the seedling resting table 2 is located in a path portion near both ends of the reciprocating horizontal movement path, and a first switch S1 that is turned on by a cam ₉ attached to the seedling resting table 2; When the remaining amount of the pine seedling portion A' supplied to the seedling take-out port 1 is reduced to half by the horizontal movement of 2, the pressure of the pine seedling portion A' by the seedling a is released and the second switch is turned OFF. When both switches S ₂ are turned ON, it is detected that the lateral movement of the seedling stand 2 is an initial lateral movement. Both the switches S ₁ and S ₂ are connected in series, and Both switches S ₁ and S ₂ connected in series
are connected in series to the reed switches S, S' and interposed in the drive circuit 5C of the electric motor 5B. 5D is a controller that controls the operation of the motor 5B by turning on and off reed switches S and S'.

According to the configuration of the above embodiment, as shown in FIG. 3A, at the initial stage of the lateral movement of the seedling platform 2, the pine seedling portion A' supplied to the seedling take-out port 1 by the lateral movement of the seedling platform 2 is sufficient. Only in this case, the amount of seedlings taken is adjusted by operating the locus adjustment mechanism 5 based on the detection by the sensor 7, and is not performed at other times. Therefore,
For example, as shown in FIG. 3B, the remaining amount of the pine portion A' supplied to the seedling take-out port 1 due to the horizontal movement of the seedling table 2 is small, and the sensor 7 may cause the seedlings to be pushed down. Even if the sensor 7 makes an erroneous detection, the amount of seedlings taken does not change.

As shown in FIG. 5, the sensor 7 may be one in which a plurality of contact surfaces 7a are arranged at regular intervals in the lateral movement direction. In this case, compared to the case where the contact surface 7a is continuous in the lateral movement direction, it is possible to suppress a decrease in detection accuracy due to variations in seedling positions.

In addition to the means described in the embodiment, means for configuring the interlocking mechanism 8 to operate only at the initial stage of lateral movement of the seedling stand 2 include a structure in which the seedling stand 2 is located at the end of the reciprocating lateral movement path. An example of a method is to provide a sensor that detects the occurrence of an abnormality, and to provide a timer that allows the motor 5B to rotate only for a certain period of time after the sensor detects this.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional side view of the main part, Figure 2 is a partially cutaway rear view of the main part, Figure 3 A and B are plan views showing the operation, Figure 4 is a circuit diagram, and Figure 5 is a separate diagram. FIG. 6 is a plan view of the main part (sensor) showing the embodiment, and FIG. 6 is a longitudinal sectional side view of a planting device equipped with a seedling harvesting amount adjusting device shown as a comparative example. 1... Seedling outlet, 2... Seedling stand, 3a...
Planting claw, 5...Trajectory adjustment mechanism, 7...Sensor,
8... Interlocking mechanism, A... Placed pine seedling, a... Seedling located on the lower side in the sending direction, b... Tip movement trajectory.

Claims (1)

[Scope of Claims] 1. A seedling resting stand 2 which is capable of reciprocating in the lateral direction and is configured to send out the pine seedlings A placed on the side of the seedling take-out port 1 each time it is located at the end of the reciprocating lateral movement; A planting claw 3a for taking out the pine seedling A from the seedling take-out port 1
and a planting device with a planting claw 3a.
In addition to providing a trajectory adjustment mechanism 5 for changing the position of the tip movement trajectory b in the seedling delivery direction, the following [A] to
A seedling harvesting amount adjusting device for a planting device having the configuration described in [C]. [B] Among the seedlings in the above-mentioned pine seedlings A,
A sensor 7 is provided which contacts the seedling a located on the downstream side in the sending direction from the downstream side in the feeding direction and detects the relative position of the seedling a with respect to the seedling pedestal 2 in the feeding direction. [B] The sensor 7 and the trajectory adjustment mechanism 5 adjust the trajectory based on the detection result of the sensor 7 so that the tip movement trajectory of the planting claw 3a is changed in position in the front-back direction of the seedling feeding direction. They are linked via an interlocking mechanism 8 that operates the mechanism 5. [C] The interlocking mechanism 8 is configured to operate the trajectory adjusting mechanism 5 only at the initial stage of the lateral movement of the seedling stand 2.