JPH0716334B2 - Seedling transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is directed to a seedling planting means for operating in a predetermined trajectory to plant one seedling in a field and a seedling planting means for planting seedlings. The present invention relates to a seedling transplanter equipped with seedling feeding means for feeding seedlings toward the seedling picking portion, which takes one strain at a time.

(Prior art) Conventionally, in Japanese Utility Model Publication No. 52-78620, detectors are provided on the left and right of the seedling take-in port, and when both detectors detect that there is no seedling, the vertical feed motor operates to feed the seedlings. There is disclosed a rice transplanter configured such that when the detector detects that seedlings are present, the operation of the vertical feed motor is stopped to stop feeding the seedlings.

Further, in Japanese Patent Laid-Open No. 59-78614, a sensor for detecting the position of seedling feeding direction of a seedling stand, and based on the detection result of this sensor, the tip movement locus of the planting nail is detected by the contact of the sensor to the seedling. A rice transplanter having a structure provided with an interlocking mechanism that operates a trajectory adjusting mechanism so as to be located at a set position that is separated by a certain distance on the upper side in the delivery direction with respect to the present is disclosed.

(Problems to be solved by the invention) In the conventional technology, the rice transplanter disclosed in Japanese Utility Model Publication No. 52-78620 discloses that the detector detects presence / absence of seedlings.
Since the detector sends the seedlings until they are detected, the seedling feeding does not become an insufficient feeding state, but may cause an excessive feeding state. For this reason, the seedlings planted by the planting device are compressed, the number of planted plants increases, and there is a problem that proper planting cannot be performed.

Further, the rice transplanter disclosed in Japanese Patent Laid-Open No. 59-78614 tries to maintain the seedling removal amount of the seedling planting device constant by changing the planting claw locus of the seedling planting device according to the feeding state of the seedlings. But
Since the trajectory of the planting claw of the planting plant is changed, there is a problem that the planting posture of the plant is tilted or the planting depth is changed.

(Means for Solving Problems) The present invention takes the following technical means in order to solve the above problems.

That is, a seedling planting means that operates in a predetermined locus to plant seedlings one by one in a field, and the seedling planting means feeds the seedlings to the seedlings toward the seedling picking part In a seedling transplanter equipped with a seedling feeding means for giving a seedling movement amount while changing the seedling movement amount at the time of seedling feeding action, a detection means for detecting the front end position of the seedling moved by the seedling feeding means is provided. , The seedling movement amount is changed to increase when the seedlings are insufficiently moved with respect to the seedling picking section according to the detection result of the detection means, and the movement amount is changed to be decreased when the seedlings are excessively moved. The seedling transplanter is characterized in that it is controlled as described above.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

1 is a riding type tow vehicle. 2 is a front wheel, 3 is a rear wheel, 4 is a hood that covers the engine, 5 is a steering wheel, and 6 is a control seat.

7 is a lifting link mechanism which is a hydraulic cylinder device (not shown)
The parallel link is mounted on the rear side of the riding-type tow vehicle body 1 so as to rotate up and down.

8 is a rice transplanter. Reference numeral 9 denotes a planting transmission case, which is made up of a main case portion in which a left-right reciprocating mechanism is incorporated, and a plurality of sub-cases 9b portions extending rearward to mount seedling planting tools.

10 is a seedling tank, which is made into a flat rectangular shape by a bottom plate and side frames divided into four parts by partitions, and each of the divided seedling tanks 10a, 10b, 10c, 10d is covered with a mat mat seedling A The seedling tank 10 is constructed so that it can be placed on the upper side of the planted transmission case 9 and is inclined so that the front side is the upper side.
It is configured so as to be movably supported to the left and right by 1, 12 and reciprocated at a constant speed by the left and right reciprocating mechanism in the planted transmission case 9.

Reference numeral 13 denotes a seedling planting tool, which is attached to the left and right sides of the rear end of the sub-case 9b by a crank and a swing arm, and is provided so as to move along a closed-loop planting locus in a side view.

Reference numeral 14 denotes a seedling receiving frame, which has an L-shaped side surface, which faces the lower end side portion of the seedling tank 10 to receive the rear surface and the front end surface of the seedling. Frame 14 as a sub-case
It sticks to 9b. The seedling receiving frame 14 is provided with seedling dividing ports 15, 15 ... Through which the planting claw portions of the seedling planting tool intervene from above to divide the seedlings.

16, 16 ... are seedling feeding belts, which are an example of a vertical seedling feeding device, and the lower part of the rollers that wind the belt is wedged to a single drive shaft, and this drive shaft is a ratchet. It is configured to be rotated by a mechanism. When the operating lever 17 of the ratchet mechanism is engaged by the rotating arms 18 attached to the ends of the rotating shafts on the left and right sides of the main case, it can be rotated to rotate the belt 16. There is. Then, the lever 17 and the rotary arm 18 are engaged when the seedling tank 10 has just come to the left and right lateral ends and the seedling planting tool 13 has finished dividing the lateral seedlings from the seedling tank 10 to seedlings. Planting equipment
It is configured to send to the 13 side.

Reference numerals 19a, 19b, 19c, 19d and 19e are detectors, and as shown in detail in FIGS. 3, 4 and 5, the main body of the switch 20 is separated from the seedling dividing port to one side on the left and right. In position, seedling tank 10
One more than the divided number is attached to the bottom of the seedling receiving frame 14, and its actuator 21 is projected slightly inward from the standing inner wall surface of the seedling receiving frame 14. Then, when the actuator 21 is held in the state of (a) in FIG. 6, the switch SW1 that should issue the stock-out signal is turned on,
When (b) is normal, both switches SW1 and SW2 are off
In addition, in the case of (c), another switch SW2 that should send a seedling overfeed signal is turned on.

Then, a signal by the ON / OFF of the switches SW1 and SW2 is provided so that the driver is warned by the red lamp RL and the blue lamp BL provided on the upper portion of the mounting support frame of the handle 5. The electric circuit is shown in FIG.

22 and 23 are seedling tank position detectors, with switches installed on both left and right sides of the seedling receiving frame 14 so that the seedling tank 10 moves to the lateral end and the seedling planting tools 13, 13 ... ON when finished taking out
It is provided to do. When the detection body 22 detects that the seedling tank 10 has approached the left end, the detection body 19 is detected.
a to 19d can be detected, and when the detection body 23 detects the right side of the seedling tank 10, the detection bodies 19b to 19e can be detected.

The embodiment of FIG. 8 shows the upper link of the lifting link mechanism 7.
24 and the rice transplanting device 8 are substantially attached, and a connecting link 27 pivotally attached to the lower link 25 and freely rotatably attached by an elongated hole 26 between the upper link 24 and a hydraulic cylinder device.
It is an example of a figure configured to be movable at 28.

The hydraulic cylinder device 28 is operated by the hydraulic circuit shown in FIG. 9, and the hydraulic valve 29 is operated and controlled by solenoids 30 and 31. In the figure, 32 is a pump and 33 is a tank. In the hydraulic cylinder device, when the switch SW1 is turned on when the actuator 21 is in the state shown in FIG. 6 (a), the solenoid 30 is excited so that the piston protrudes, and conversely, in the state shown in FIG. 6 (c). switch
When SW2 turns on, the solenoid should be pulled in by the piston 31
Are configured to be excited. In the figure, 34 and 35 are leveling floats.

Next, the operation of the above example will be explained. During the seedling planting operation, the seedling tank 10 reciprocates left and right, and the seedling planting tools 13, 13 ...
The seedlings are supplied from the seedling dividing ports 15,15 ... of the seedling receiving frame 14 to each plant. Then, the seedling planting tools 13, 13 ... Plant the supplied seedlings one after another in the field scene.

During this operation, each of the detectors 19a to 19e always detects whether or not the tip of the seedling is accurately in contact with the inner wall surface portion of the seedling receiving frame 14 which is erected. When the seedling tank 10 approaches the side opposite to the detection bodies 19a and 19e, the seedling A comes out of contact with the seedling tank 10 because it leaks from the seedling tank 10 and the switch SW1 is always turned on.

However, the detection of the detectors 19a and 19e when the seedling tank 10 is not positioned is omitted by the seedling tank position detectors 22 and 23.

In this way, the detectors 19a to 19e monitor the contact state of the seedlings during the work, and the actuator of the switch.
When the front 21 of the seed bed does not come into contact with the standing surface of the seedling receiving frame 14 as shown in FIG. 6 (a), the switch SW1 is turned on and the red lamp RL is turned on to the driver. At the same time, the solenoid 30 is excited and the hydraulic switching valve 29 is switched to switch the hydraulic switching device 29 so that the piston of the hydraulic cylinder device 28 is projected so that the entire rice transplanting device 8 is pitched so that the rear side becomes lower.
The angle of 10 is steeply inclined to encourage the seedling A to slide down.

On the contrary, when the seedling A slides down too much and the actuator 21 is pushed excessively and the switch SW2 is turned on as shown in FIG. 6C, the blue lamp BL is turned on to inform the driver and the solenoid 31 Is excited to switch the hydraulic pressure switching valve 29 to retract the piston to loosen the angle of the seedling tank 10 and control to prevent excessive sliding down.

The drawings shown in FIG. 10 to FIG. 12 show the mounting structure of the seedling retainer rod for pressing the seedbed upper surface of the seedling tank 10. Explaining this, 36 is a support pin which is erected on the side frame portion of the seedling tank 10 via a bracket 37. Then, attach a pipe 39 that can be adjusted up and down with butterfly bolts 38 to this strut 36,
A shaft in which a lever guide plate 40 having a notch is fixed to the pipe 39, and further seedbed holding rods 41, 41 are attached to the pipe 39.
A boss 43 is attached to receive the rotatably 42. And
A lever 44 made of a spring material is integrally provided on the shaft 42 so that the lever 44 can be engaged with and disengaged from the notch of the lever guide plate 40, and a spring 45 is provided between the lever 44 and the support pin 36. It is stretched.

According to this configuration, when the tension of the spring 45 securely presses the upper surface of the nursery, the lever 44 is moved to the guide plate as shown in FIG.
When the engagement with the notch of 40 is stopped, the nursery bar pressing rod 41 presses the upper surface of the nursery bed. When the seedbed is likely to slip off, the lever 44 may be engaged with the notch of the guide plate 40 as shown in FIGS. 10 and 11 to cancel the tension of the spring 45. Furthermore,
By engaging the lever 44 with the notch of the upper guide plate 40, the height of the seed bed pressing rod 41 can be freely adjusted.

(Operation and effect of the invention) From the above, the seedling transplanting machine of the present invention is properly maintained without changing the planting locus of the seedling planting means, and the seedling movement amount when the seedling feeding means operates. The seedlings are controlled so that the seedlings are moved to the proper position by changing to a state where there is no excess or deficiency, and as a result, the amount of seedlings taken by the seedling planting means is maintained at a constant level. There is no change in the number of seedlings planted, and seedling planting means plant seedlings in the field.

Therefore, according to the present invention, by appropriately maintaining the planting locus of the seedlings and controlling the movement of the seedlings when the seedlings are fed, there is no shortage planting, and the number of planting seedlings. Fluctuation is prevented and seedling planting accuracy is improved.

[Brief description of drawings]

 Each drawing will be briefly described below.

[Fig. 1] Side view of passenger rice transplanter

[Fig. 2] Plan view of passenger rice transplanter

[Fig. 3] Side view of essential parts

[Fig. 4] Plan view of the main part

FIG. 5 is a plan view of a simplified main part.

[FIG. 6] (a), (b) and (c) are side sectional views showing the operating state of the main part.

[Fig. 7] Electric circuit diagram

[Fig. 8] Side view of essential parts

[Fig. 9] Hydraulic circuit diagram

[Fig. 10] Partial side view showing a mounting structure of a seedling holding rod.

[Fig. 11] Partial plan view showing the mounting structure of the seedling holding rod.

FIG. 12 is a partial side view showing a working state of a seedling holding rod. Main symbols in the figure will be described. 10: Seedling tank, 13: Seedling planting equipment 15: Seedling dividing port, 16: Seedling vertical feeding device 19a to 19e: Detecting body

Claims (1)

[Claims] 1. A seedling planting means that operates in a predetermined locus to plant one seedling at a time in a field, and a seedling picking section at which the seedling planting means takes one seedling toward the seedling picking section. In a seedling transplanter equipped with a seedling feeding means for feeding the seedling, the seedling movement amount during the seedling feeding action is provided to be changeable, and the seedling feeding means operates to detect the front end position of the moved seedling. Means is provided, and according to the detection result of the detection means, the seedling movement amount is changed to increase when the seedling is not sufficiently moved with respect to the seedling picking section, and the seedling movement amount is decreased when the seedling is excessively moved. A seedling transplanter characterized by being configured to be controlled to change to.