JPH05111318A - Seedling transplanter - Google Patents

Abstract

PURPOSE:To enable optimum correction of a planting depth of a seedling even by changing the condition of seedling planting work with an operation lever by vertically shifting a supporting shaft at the rear end of a float of a seedling transplantation apparatus by the operation of an operation lever. CONSTITUTION:A mobile vehicle is provided with an operation lever 32 for changing the condition of seedling planting work. The supporting shaft 48 at the rear end of the float 13 of the transplantation apparatus is vertically shifted by operating the operation lever to correct the variation in the planting depth of the seedling by the change in the working condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is used for a riding type seedling planting machine used in a paddy field, even if the working conditions are changed.
The planting depth of seedlings is corrected appropriately.

[0002]

2. Description of the Related Art As a conventional technique of this kind, there is one in which an operator adjusts a planting depth by a planting depth adjusting lever in accordance with a field condition or a working condition. However, adjusting the planting depth under the conditions of the field is not necessary after adjusting once during the planting work, but it is necessary to adjust it depending on the working conditions many times during the work. Also had to be done, which was very cumbersome and inefficient in work.

[0003]

In order to solve the above-mentioned problems, the present invention provides a traveling vehicle body 1 in which wheels 4 roll and propel on a tiller of a paddy field, and a float 1 attached to the rear portion thereof.
3 includes a seedling planting device 9 that slides on the mud surface of the paddy field, and a drive device 18 that maintains the seedling planting device 9 at a predetermined height with respect to the mud surface. The planting depth of the seedlings by the seedling planting rod 12 can be adjusted by moving to the position, and when the depth of the cultivator fluctuates, the tip portion moves up and down and the drive device 18 is operated by the signal. In the seedling planting machine, by operating the operation lever 32 provided on the traveling vehicle body 1 to change the seedling planting work conditions, the support shaft 48 at the rear end of the float 13 is vertically moved to plant seedlings by changing the working conditions. This is a seedling planting machine configured to correct the change in depth and change the planting depth to an appropriate value.

[0004]

According to the present invention, when the cultivator of the paddy field has a deep shallow depth, the tip of the float 13 is moved up and down according to the deep shallow depth, and the drive device 18 causes the driving device 18 to move up and down. Is raised and lowered to keep it at a constant height above the mud surface, so that the planting depth of the seedlings by the seedling planting rod 12 is made uniform regardless of the depth of the cultivator. Further, by operating the operation lever 32 for changing the seedling planting work conditions provided on the traveling vehicle body 1, the support shaft 48 at the rear end of the float 13 is vertically moved to change the working conditions so that the seedling planting depth can be increased. The planting depth of the seedlings can be made appropriate because the change is corrected and the planting depth is changed to an appropriate one.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the seedling planting device 9 is mounted on the link 15 after the traveling vehicle body 1 to form a riding type seedling planting machine. The traveling vehicle body 1 includes a pair of front wheels (not shown) and a rear wheel 4 in front of and behind the gear box 2, which are rotated by the power of the engine and roll on the paddy field of the paddy field to move forward. It is designed to do. A pair of chain cases 3 extend obliquely rearward and downward from both sides of the gear box 2, and the rear wheel 4 is provided outside the lower end thereof. Both ends of the horizontal rod 6 are fixed to the inside of each chain case 3, a strut 7 extends upward from the center thereof, a seat 5 is provided at the upper end thereof, and an operation panel 8 is arranged beside the seat 5. ..

The seedling planting device 9 is a planted transmission case 1 in the central portion.
0, a seedling mounting table 11 which is provided on the front of the seedling mounting table 11 and reciprocates left and right, and a tip of the seedling mounting table 11 rotates at the lower end of the seedling mounting table 11
It consists of a seedling planting rod 12 that cuts off the above-mentioned seedlings one by one and inserts it into the mud surface below, and floats 13 and 14 that are provided below the planting transmission case 10 and slide on the mud surface. ing.
Then, the rear end of the planted transmission case 10 extends rearward under the seedling mounting table 11, and the seedling rod 1 is provided on the side of the rear end portion.
2 is installed.

The link 15 is composed of a pair of upper and lower links 16a and 16b as viewed from the side, and a vertical frame 17 having rear ends thereof rotatably mounted. Then, the tips of the links 16a and 16b are rotatably attached to the column 7, and the planted transmission case 10 is attached to the rear end of the vertical frame 17. A cylinder 18a that constitutes the drive device 18 extends obliquely upward and rearward from the rear end portion of the gear box 2, and the upper end of the piston rod 18b protruding and retracting from this is connected to the intermediate portion of the link 16a.

As shown in FIGS. 1 and 2, the pump 20
The oil discharged from the cylinder 18a passes through the switching valve 21.
When it flows in, the piston rod 18b projects and pushes down the rear end of the link 15, so that the seedling planting device 9 rises. When the switching valve 21 operates and the port on the cylinder 18a side communicates with the port on the tank 19 side, the cylinder 1
The oil in 8a returns to the tank 19, and the seedling planting device 9 descends due to its weight and the like.

A horizontal shaft 22 is rotatably attached to the lower abdomen of the planted transmission case 10, from which a plurality of arms 23 are provided.
Extends obliquely downward and the rear portions of the floats 13 and 14 are rotatably attached to the respective tip ends by a support shaft 48,
The rotation of the horizontal shaft 22 causes the rear ends of the floats 13 and 14 to move up and down, and the ends of the floats 13 and 14 rotate around the support shaft 48. The floats 13 and 14 are
It is composed of a center float 13 and side floats 14 arranged on both sides thereof. The tip of the center float 13 is connected to the switching valve 21 by the rod 49. When the tip of the float 13 rises, the port of the pump 20 is connected to the port of the cylinder 18a, and when it descends, the port of the cylinder 18a is opened. It is connected to the port of the tank 19. Therefore, when the wheel 4 comes to a deep place (shallow place) of the cultivator, the seedling planting device 9 together with the traveling vehicle body 1
Sink (float), the support shaft 48 sinks (lifts), the tip of the float 13 rises (falls), the rod 49 rises (falls), the switching valve 21 operates, and the seedling planting device 9 rises. (Down).

As shown in FIG. 3, a shaft 24 is horizontally rotatably attached to the front end portion of the planted transmission case 10, and the U-frame 2
The rear end of 5 is fixed to the shaft 24. Motor 30
Is rotatably attached to the planted transmission case 10, and a male screw 30a extending obliquely downward from this is a female screw 3 of the U-shaped frame 25.
1, the male screw 30a is rotated in the forward and reverse directions by the operation of the motor 30 so that the tip of the U-shaped frame 25 moves up and down. When the arm 27 is fixed downward to the base of the U-shaped frame 25, the arm 28 projects upward from the horizontal shaft 22, and both are connected by the rod 29, and the U-shaped frame 25 rotates up and down, the arm 23 also moves. The support shaft 28 moves up and down by rotating up and down.

A boss 34 integral with the L-shaped metal 35 is rotatably mounted in the operation panel 8, and an operation lever 32 extending upward from the boss 34 for changing the seedling planting work condition (sensitivity) is projected upward from the guide groove 33. The spring 36 pushes it laterally to enter the engaging portion on the side surface of the guide groove 33.
Both ends of the outer wire 38 have the operation panel 8 part and the U-shaped frame 25.
, And one end of a wire 38 a passing through it is attached to the tip of the L-shaped metal 35. When viewed from the side, both ends of the expansion-contraction link 26, which has a U-shape, have a U-shape 25 and a float 1.
3, the leg portion on the left side of the wire 38a extends upward, and the other end of the wire 38a is connected to the upper end of the expansion / contraction link 26 via a spring 37. Therefore,
When the operating lever 32 is operated in the direction of arrow a, the spring 37 is loosened and the force of pushing the tip of the float 13 downward is weakened. When operated in the opposite direction, the spring 37 is stretched and the force is increased. There is. The valve box of the switching valve 21 is rotatably attached to the side of the U-shaped frame 25.

A potentiometer 39 is provided in the operation panel 8 after the L-shaped metal 35. This potentiometer 39 is provided with a pipe 41 operated by an adjustment lever 42.
The output voltage changes according to the rotation of the adjustment plate 44 and the rotation of the adjusting plate 44 in the opposite direction. The adjusting lever 42 has a guide groove 4
3, the adjusting plate 44 is connected to the lower end of the L-shaped metal 35 by a rod 45, and the output voltage is changed by operating the adjusting lever 42 and the operating lever 32. If the right end of the rod 45 is replaced with the holes 50, 50 ..., The adjustment plate 4 when the operation lever 32 is operated.
The amount of rotation of 4 can be adjusted.

The potentiometer 40 is a transmission case 1 with a plant.
It is installed between 0 and the shaft 24, and when the shaft 24 rotates,
The output voltage changes. The potentiometers 39 and 40 and the motor 30 are connected to the motor 30 via the comparator 46 and the amplifier 47 as shown in FIGS. 4 and 5. Therefore, when the adjusting lever 42 is operated to the shallow planting side (in the direction of arrow B in FIGS. 1 and 3), the output voltage of the potentiometer 39 increases more than the output voltage of the potentiometer 40, and the increased voltage increases. Amplified by the amplifier 47, the motor 30 turns the male screw 3 into
0a is normally rotated, the female screw 31 pulls up the tip of the U-shaped frame 25, is pulled by the rod 29, and the rear end of the arm 23 rises,
The support shaft 48 pulls up the rear portions of the floats 13 and 14 to reduce the planting depth of seedlings. At this time, since the shaft 24 rotates together with the U-shaped frame 25, the output voltage of the potentiometer 40 also gradually increases, and when this coincides with the output voltage from the potentiometer 39, the operation of the motor 30 stops.
When the adjusting lever 42 is operated to the opposite side of the deep implantation, the motor 30 operates in the opposite manner.

When the seedling planter is used in a paddy field where mud is soft, the operating lever 32 is operated to the soft or sensitive side (direction of arrow a). Then, the wire 38 is loosened and the tension of the spring 37 is weakened. Therefore, the tip of the float 13 is lifted with a small force to allow the rod 49 to easily switch the switching valve 21. At this time, the L-shaped metal 35 rotates the adjustment plate 44 in the counterclockwise direction (arrow C) by the rod 45, and the potentiometer 39 outputs the same as when the adjustment lever 42 is operated in the direction opposite to the arrow. The voltage decreases, the motor 30 reverses the male screw 30a, the rear end of the lever 23 descends, and the rear ends of the floats 13 and 14 descend, which is slightly corrected to the deep planting side.
When the seedling planting machine comes to a place where the mud is hard, the operation is performed in reverse to the above, and the rear ends of the floats 13 and 14 are lifted by the support shaft 48 and adjusted to the shallow planting side.

Particularly, when the paddy field has a deep shallow depth, the tip of the float 13 is moved up and down according to the deep shallow depth, and the drive device 18 moves the seedling planting device 9 up and down in response to the vertical movement signal. Since this is kept at a constant height from the mud surface, the planting depth of the seedlings by the seedling planting rod 12 is made uniform regardless of the depth of the cultivator. Further, by operating the operation lever 32 provided on the traveling vehicle body 1 to change the seedling planting work condition (sensitivity), the support shaft 48 at the rear end of the float 13 is vertically moved to plant seedlings by changing the work condition. Since it is configured to correct the change in depth and change the planting depth to an appropriate one, the planting depth of seedlings can be made appropriate, and good seedling planting work can be performed.

[Brief description of drawings]

[Figure 1] Side view of the main part of the seedling planting machine

[Fig. 2] Hydraulic circuit diagram

FIG. 3 is an enlarged perspective view of a main part.

FIG. 4 is a block circuit diagram.

[Fig. 5] Electric circuit diagram

[Explanation of symbols] 1 traveling vehicle 4 wheels 9 seedling planting device 12 seedling planting rod 13 float 18 drive device 32 operating lever 37 spring 48 supporting shaft

Claims (1)

[Claims] 1. A traveling vehicle body 1 in which wheels 4 roll and propel on a cultivator in a paddy field, a seedling planting device 9 mounted on a rear part of the float body 13 to slide on a mud surface of a paddy field, and a seedling planting device. And a drive device 18 for maintaining the 9 at a predetermined height with respect to the mud surface,
In the float 13, the rear end support shaft 48 moves up and down to adjust the planting depth of the seedling by the seedling planting rod 12, and when the depth of the cultivator fluctuates, the tip portion moves up and down. In the seedling planting machine provided so that the drive device 18 operates, the support shaft 48 at the rear end of the float 13 is vertically moved by operating the operation lever 32 provided on the traveling vehicle body 1 to change the seedling planting work condition. The seedling planting machine is configured to correct the planting depth of the seedling due to the change of the working condition and to change the planting depth to an appropriate value.