JPH057962B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention uses a rice transplanter to control the types of seedlings to be planted, such as young seedlings, mid-grown seedlings, and adult seedlings, or the distance between rows and plants of the planted seedlings. The present invention relates to an improvement of a device for adjusting the amount of seedlings taken out of a planting device for adjusting the amount of seedlings to be planted depending on the level of seedlings.

[Conventional technology]

Conventionally, as a seedling removal amount adjusting device of this type of planting device, when adjusting the amount of seedling removal by changing the movement locus of the planting claw of the planting device, the connection point between the planting claw and the fixed part is used. The position of the swinging fulcrum in 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 adjusted relative to the seedling outlet of the seedling stand. The position was changed back and forth in the direction of sending out the seedlings (for example, see Japanese Patent Application Laid-open No. 56-32909).

[Problem to be solved by the invention]

However, with the above-mentioned conventional adjustment means, the amount of seedlings to be removed can only be adjusted in advance by visual measurement and manually before the planting operation, and therefore the following problems occurred.

In other words, when dividing the seedlings using the planting claws, the upper part of the pine seedlings placed on the seedling stand is separated.
This is done by inserting a planting claw into the upper side of the seedling feeding direction by a predetermined distance from the edge of the seedling, and scraping off the seedbed soil with the planting claw. No matter how accurately you set the position of the planting claw from the edge of the seedbed soil, if there are variations in the planting spacing of the seedlings on the seedbed soil, it will be difficult to accurately divide the seedlings by a predetermined amount. However, depending on the degree of variation, there was a risk that the planting claws would divide the part of the soil bed where no seedlings were planted, resulting in missing plants.

In addition, since the swinging fulcrum position of the planting claw is adjusted by rotating the screw shaft, it is impossible to adjust the amount of seedlings taken each time the planting claw is operated.
It was not possible to adjust each time according to changes in the planting interval of seedlings.

An object of the present invention is to always automatically detect the position of the seedlings even if there are variations in the planting interval of the seedlings supplied by the seedling supply device, and to be able to reliably divide and take out the soil bed where the seedlings are located. An object of the present invention is to provide a device for adjusting the amount of seedlings taken by a rice transplanter, which can adjust the locus of movement of the tip of the planting claw.

[Means to solve the problem]

The technical means of the present invention taken to achieve the above object includes providing a planting claw trajectory adjusting device that can adjust the movement trajectory of the tip of the planting claw in the direction of distance with respect to the seedling supply device, and A seedling position detection sensor is provided to detect the position of the seedlings supplied from the seedling, and the trajectory adjustment device is controlled based on the seedling position detection result of the sensor, so that the tip movement trajectory of the planting claw is automatically adjusted. That's what I did.

[Effect]

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

In other words, instead of determining the nail entry position based on the edge of the soil in the nursery bed for pine seedlings, a sensor is installed to detect the part of the pine seedling where the seedling is planted, and the sensor always determines the actual position. Since the position of the seedlings is detected and the plunge position of the claw is set based on this, even if there are variations in the planting interval of the seedlings supplied by the seedling supply device, this can be automatically adjusted. The claw entry position can be adjusted.

〔Effect of the invention〕

Therefore, even if there are variations in the planting interval of the seedlings supplied by the seedling supply device, one planted seedling can be reliably divided with the seedlings still present without being affected by the variation, and the seedlings can be divided without any defects. This method has the advantage that seedlings can be planted with less risk of seedlings forming.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

As shown in Figures 1 and 2, a rotating arm 2 that is constantly driven and rotated in the M fixed direction and a swinging lever 3 that is pivoted at one end are installed on the fixed machine frame 1 at the rear of the rice transplanter, and the rice transplanter is planted on the front end side. The rear end of the planting case 5 on which the claw 4 is attached is pivotally connected to the free end of the swing lever 3, and the free end of the rotary arm 2 is pivotally connected to the center of the planting case 5. , which also constitutes a seedling planting device for a rice transplanter.

As the rotating arm 2 rotates, the planting claw 4 rotates while drawing a loop-shaped seedling planting trajectory between the seedling take-out port 6a of the seedling supply device 6 and the planting mud surface. Then, a seedling equivalent to one plant is taken out from the seedling supply device 6, and at the same time, when planting seedlings, the planting claw 4 is rotated in conjunction with the rotation of the rotary arm 2, which is provided on the lower side of the planting claw 4. The seedling pusher 7, which reciprocates in the direction of the rod, moves to the tip of the claw and plants the seedling.

Furthermore, the amount of seedlings taken from the seedling supply device 6 of the planting claw 4 is controlled by an automatic seedlings removal amount adjustment device A configured as described below.
Accordingly, the planting claw 4 is configured to be adjustable to a predetermined amount each time the planting operation is performed.

To configure the automatic seedling removal amount adjustment device A, a seedling position detection sensor 8 is provided on both sides of the seedling removal port 6a of the seedling supply device 6 to detect the seedling position, and based on the seedling position detection result of this sensor 8, A planting claw trajectory adjustment device 9 is provided, which is configured to adjust the movement trajectory of the tip of the planting claw 4 by vertically moving the pivot point P of the swing lever 3 toward the fixed machine frame 1 side. In addition, a feedback link 11 is provided for feeding back the amount of fluctuation of the pivot point P, which is vertically moved by the adjusting device 9, to the seedling position sensing section 10 of the sensor 8.

The seedling position detection sensor 8 includes a sensor arm 1 which faces upward and has a U-shape when viewed from the side.
2 and 12 are pivotally connected to the fixed machine frame 1, and the sensor arm 1 is pivoted about this pivot point Q.
2 and 12 are interlocked in the vertical direction to be freely rotatable, and one end 12 on the side of the machine frame 1 from the pivot point Q
One of the arms 12a and 12a is urged downward by the spring member 13, and either of the tips 12b, 12b of the two arms 12, 12 is applied to the seedling at the lowest position of the seedling supply device 6. It is biased to make contact.
Both sensor arms 1 are attached to the rear part 11a of the feedback link 11 on the sensor 8 side.
Limit switches S1 and S2 are provided to detect vertical fluctuations in the seedling position sensor 1.
0 is configured.

A spring member 13 that biases one end 12a of the sensor arm 12 downward is connected to a seedling removal amount adjusting lever 15 via a wire 14, and the spring member 13 biases one end 12a of the sensor arm 12 downward. By adjusting the force, the operating positions of the limit switches S1, S2 constituting the seedling position sensing section 10 can be moved, and the amount of seedlings taken can be adjusted manually.

On the other hand, as shown in FIG. 3, the planting claw trajectory adjusting device 9 adjusts the pivot point P of the swinging lever 3 toward the fixing machine frame 1 side in a state where the swinging lever 3 can freely swing. The position is configured to be movable in the vertical direction, and the amount of movement is adjusted by a screw shaft 17 driven by a motor 16.
In addition, the movement locus of the tip of the planting claw 4 is moved in the distance direction with respect to the seedling removal port 6a of the seedling supply device 6, so that the amount of seedlings removed from the seedling supply device 6 can be adjusted.

As shown in FIG. 4, the motor 16 is switched between the switches S1 and S2 provided in the seedling position sensing section 10 constituting the seedling position detection sensor 8, that is, depending on the distance of the seedling position.
By rotating forward and reverse until both S1 and S2 are turned OFF, the locus of movement of the planting claw 4 is automatically adjusted to achieve the corresponding amount of seedlings taken.

On the other hand, the amount of vertical movement of the pivot point P of the swing lever 3 is transmitted to the seedling position sensing section 10 via the feedback link 11, and the displacement due to the contact of the sensor arms 12, 12 with the seedling is The sensing section 10 is moved to the position where the switches S1,
Both S2 are turned off, and the motor 16 is configured to be automatically stopped at a position where a predetermined amount of seedlings are taken.

While reciprocating in the left and right direction at a predetermined pitch, the seedling supply device 6 takes out a predetermined amount of seedlings from the seedling take-out port 6a by the planting claw 4, and moves to the end position of the reciprocating movement. Then, the direction of movement is changed, and the vertical feeding claws 18 are configured to supply seedlings from above.
It is supported by a support frame 19 on its back side so as to be movable laterally. Furthermore, this support frame 19 is provided with a switch S3 that is turned off while the support frame 19 is in contact with either one of the two abutment members 20, 20 protruding from the seedling supply device 6. It is configured to detect the state in which the supply device 6 is located at the end of its movement.

Then, the signal output from the switches S1 and S2 provided in the seedling position sensing section 10 is transmitted to the switch S3.
is connected to the drive circuit 21 of the motor 16 through the switch, and while the seedling feeding device 6 is located at the end of its movement, the signal output from the switches S1 and S2 is turned off to operate the motor 16. It is configured to temporarily suspend the process.

That is, after the seedlings are taken out while the seedling supply device 6 is located at the end of its movement, and until the vertical feeding claws 18 are operated and the seedlings are supplied from above, Sensor arm 12, 12
Since none of them come into contact with the seedling to be detected,
In order to prevent the trajectory adjustment device 9 from malfunctioning during this time, the motor 16 is temporarily deactivated.

Note that in this embodiment, the seedling position sensing section 10
Two switches S1 and S2 are provided on arm 1.
Although the configuration is configured to sense vertical movements of the arms 12 and 12, it is also possible to provide one switch capable of outputting three positions so that the contact can be switched in response to the vertical movements of the arm 12.

Further, the switches S1 and S2 may be replaced with contact type switches, and switches that sense the vertical movement of the arm 12 in a non-contact manner may be used.

Furthermore, the seedling position sensing sections 10, 10 are provided in the sensor arms 12, 12, respectively, and the planting claws are adjusted based on the result of one seedling position detection corresponding to the right and left movement directions of the seedling feeding device 6, respectively. The moving trajectory of No. 4 may be automatically adjusted.

Furthermore, the vertical movement of the pivot point P of the swing lever 3 may be manually adjustable, so that the locus of movement of the planting claws 4 may be directly adjustable.

Furthermore, as a drive source for vertically moving the pivot point P of the swing lever 3, other means such as a hydraulic cylinder may be used instead of the motor 16.

[Brief explanation of drawings]

The drawings show an embodiment of the seedling harvesting amount adjusting device for a rice transplanter according to the present invention, and FIG. 1 is a plan view of the main part of the seedling planting device of the rice transplanter, FIG. 2 is a side view of the main part, and FIG. are rear views of the main parts of the planting claw trajectory adjustment device, and the fourth
The figure is a circuit diagram of the motor drive system. 4... Planting claw, 6... Seedling supply device, 8... Seedling position detection sensor, 9... Planting claw trajectory adjustment device.

Claims (1)

[Claims] 1. A planting claw trajectory adjustment device 9 is provided which can adjust the movement trajectory of the tip of the planting claw 4 in the distance direction with respect to the seedling supply device 6, and a seedling that detects the position of the seedlings supplied from the seedling supply device 6 is provided. A position detection sensor 8 is provided, and the trajectory adjustment device 9 is controlled based on the seedling position detection result of the sensor 8, so that the tip movement trajectory of the planting claw 4 is automatically adjusted. A device for adjusting the amount of seedlings removed by a rice transplanter.