JPH0687692B2 - Seedling planting machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a seedling planter used in a paddy field.

[Conventional technology and its problems]

As a conventional technique of this kind, with a planting depth adjustment lever,
There is one in which the operator adjusts the planting depth according to the field conditions and work conditions.

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 according to the working conditions many times during the work. It had to be done, and it was very cumbersome and the work efficiency was poor. In addition, it may not be possible to properly plant seedlings by forgetting the adjustment itself.

There are also cases where both the conditions of the field and the working conditions must be taken into consideration to satisfy both of the conditions.

[Means for Solving the Problems]

In order to solve the above problems, the present invention provides a traveling vehicle body 1 in which wheels 4 roll and propel on a cultivator in a paddy field, and a seedling plant in which a float 13 is mounted on the rear part and slides on a mud surface in a paddy field. The float 13 is provided with a device 9 and a drive device 18 for maintaining the seedling planting device 9 at a predetermined height with respect to the mud surface. In the seedling planting machine, in which the planting depth can be adjusted and the front side moves up and down when the depth of the cultivator fluctuates and the drive device 18 is activated by the signal, By operating the operation lever 32 for changing the seedling planting work condition, the support shaft 48 at the rear part of the float 13 is moved up and down to correct the planting depth of the seedling by changing the working condition and to obtain an appropriate planting depth. And a correction mechanism A for changing the planting depth, and adjusting the degree of correction of the planting depth in the correction mechanism A. It is obtained by a seedling planting machine according to characterized in that a B.

[Advantageous effects of the invention]

According to this invention, if the paddy field has a deep shallow depth, the front side of the float 13 moves up and down according to the deep shallow depth,
The drive device 18 moves the seedling planting device 9 up and down by the signal of the vertical movement and keeps it at a constant height above the mud surface, so that the seedling planting device 12 can be used to plant seedlings regardless of the depth of the plow. The depth becomes uniform.

Further, by operating the operation lever 32 provided on the traveling vehicle body 1 to change the seedling planting work condition, the support shaft 48 at the rear portion of the float 13 is operated.
Since the correction mechanism A is provided for moving up and down to correct the planting depth of the seedlings by changing the working conditions, the planting depth of the seedlings automatically becomes appropriate regardless of the change of the working conditions.

Further, since the adjusting unit B for adjusting the degree of correction of the planting depth is provided in the correction mechanism A, the adjusting unit B is adjusted according to the condition of the field to correct the planting depth suitable for the condition of the field. It is possible to adjust the degree, and it is possible to solve the problems of the prior art.

〔Example〕

 Next, examples of the present invention will be described.

As shown in FIG. 1, a seedling planting device 9 is attached by a link 15 after the traveling vehicle body 1 to form a riding type seedling planting machine.

The traveling vehicle body 1 is provided with a pair of front wheels (not shown) and a rear wheel 4 in front of and behind the gear box 2, respectively, which receive the power of the engine to rotate 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, and the pillar 7
Extends upward, and a seat 5 is provided at the upper end of the seat 5.
An operation panel 8 is arranged next to the.

The seedling planting device 9 includes a transmission case 10 with a plant in the central portion, a seedling mounting table 11 provided on the front of the seedling mounting table 11 to reciprocate left and right, and a tip of the seedling mounting table 11 pivots at the lower end of the seedling mounting table 11. 11 A seedling planting tool 12 for cutting off the above seedlings for each plant and planting it on the lower mud surface, and a float 1 provided under the planting transmission case 10 for sliding on the mud surface 1
It is composed of 3,14. Then, the rear end of the planting transmission case 10 extends under the seedling mounting table 11 and extends rearward, and the seedling planting device 12 is mounted on the side of the rear end portion.

The link 15 includes a pair of upper and lower links 16a and 16b when viewed from the side, and a vertical frame 17 having rear ends thereof rotatably attached.
It is composed of. 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 rearward and upward from the rear end of the gear box 2 and then extends and retracts from the piston rod 18
The upper end of b is connected to the middle part of the link 16a.

As shown in FIG. 1 and FIG. 2, when the oil discharged from the pump 20 flows into the cylinder 18a through the switching valve 21, the piston rod 18b projects and pushes down the rear end of the link 15 to raise the seedling planting device 9. It is designed to do. Switching valve 21
Is activated and the port on the cylinder 18a side communicates with the port on the tank 19 side, the oil in the cylinder 18a returns to the tank 19 and the seedling planting device 9 descends.

A horizontal shaft 22 is rotatably attached to the lower abdomen of the planted transmission case 10, from which a plurality of arms 23 extend obliquely downward and rearward, and the rear portions of the floats 13 and 14 are respectively provided with support shafts 48 at their tips.
It is mounted so that it can be freely rotated.
4 The rear part moves up and down, and the front side of the float 13 and 14 is the spindle.
It is designed to rotate around 48. Float 13,14
Is composed of a central float 13 and side floats 14 arranged on both sides thereof. And the center float
The tip of 13 is connected to the switching valve 21 by a rod 49, and when the front side 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 cylinder 18a
The port of is connected to the port of tank 19. Therefore, when the wheels 4 come to a deep place (shallow place) of the tiller, the seedling planting device 9 sinks (floats) together with the traveling vehicle body 1.
The support shaft 48 sinks (lifts up), the front side of the float 13 rises (falls), the rod 49 rises (falls), the switching valve 21 operates, and the seedling planting device 9 rises (falls).

As shown in FIG. 3, a shaft 24 is laterally rotatably attached to the tip of the planted transmission case 10, and the rear end of the U-shaped frame 25 is the shaft 24.
It is fixed to. A motor 30 is rotatably attached to the planted transmission case 10, and a male screw 30 extends downward from the front
a is screwed into the female screw 31 of the U-shaped frame 25, and 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. The arm 27 is fixed downward to the base of the U-shaped frame 25, and the arm 28 projects upward from the horizontal shaft 22,
Both are connected by a rod 29, and when the U-shaped frame 25 rotates up and down, the arm 23 also rotates up and down, and the support shaft 28 moves up and down.

A boss 34, which is integral with the L-shaped metal 35, is rotatably mounted in the operation panel 8, and a sensitivity adjusting lever 32 as an operation lever, which extends upward from the boss 34, is a guide groove.
It projects upward from 33 and is pushed laterally by a spring 36 so as to enter the engaging portion on the side surface of the guide groove 33. Both ends of the outer wire 38 are attached to the operation panel 8 part and the U-shaped frame 25,
One end of a wire 38a passing through this is attached to the tip of the L-shaped metal 35. Cross-shaped expansion and contraction link 26 seen from the side
Both ends of the wire are attached between the U-shape 25 and the tip of the float 13, and the left leg of the wire extends upward,
The other end of is connected to the upper end of the expansion / contraction link 26 via a spring 37. Therefore, when the sensitivity adjusting lever 32 is operated in the direction of arrow A, the spring 37 is loosened and the force for pushing down the front side of the float 13 is weakened.
37 is stretched so that its power becomes stronger. The valve box of the switching valve 21 is rotatably attached to the side portion of the U-shaped frame 25.

A potentiometer 39 is attached to a pipe 41 rotatably attached to the operation panel 8 with a pin. Further, the potentiometer 39 is configured such that the output voltage is changed by the operation of the planting depth adjusting lever 42 attached to the pipe 41 and the rotation of the adjusting plate 44 attached to the outer wall of the potentiometer 39. . The planting depth adjustment lever 42 has a guide groove 43
The adjusting plate 44 is a rod 45 and is an L-shaped metal 35.
The output voltage is changed by operating the planting depth adjusting lever 42 and the sensitivity adjusting lever 32. This sensitivity adjusting lever 32 is connected to the lower end of the L-shaped metal 35 by a rod 45 and an adjusting plate 44, and a planting depth adjusting lever is provided.
The correction mechanism A is configured by being connected to 42.

If the right end of the rod 45 is replaced with the holes 50, 50 ..., The amount of rotation of the adjusting plate 44 when the sensitivity adjusting lever 32 is operated can be adjusted, and the degree of correction of the planting depth of the correction mechanism A can be adjusted. It is an adjusting section B for performing.

The potentiometer 40 is attached between the planted transmission case 10 and the shaft 24, and when the shaft 24 rotates, the output voltage changes. And each potentiometer
39, 40 and the motor 30, as shown in FIGS. 4 and 5,
It is connected to the motor 30 via a comparator 46 and an amplifier 47.

Therefore, when the planting depth adjusting lever 42 is operated to the deep planting side (in the direction of the opposite 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 increases. The minute voltage is amplified by the amplifier 47, the motor 30 rotates the male screw 30a in the forward direction, the female screw 31 pulls up the tip of the U-frame 25, and the rod 29 pulls the rear end of the arm 23 up, and the support shaft 48 moves. The planting depth of seedlings is deepened by pulling up the rear parts of the floats 13 and 14. 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 matches the output voltage from the potentiometer 39, the operation of the motor 30 stops. When the planting depth adjusting lever 42 is operated to the opposite shallow planting side, the motor 30 operates in reverse to this.

When the seedling planter is used in a paddy field where mud is soft, or when it comes to a soft place in the mud during work, the sensitivity adjusting lever 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 front side 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 adjusting plate 44 in the counterclockwise direction (arrow C) by the rod 45, and the potentiometer 39 rotates around the pipe 41 to move the planting depth adjusting lever 42 to the arrow shown above. Similar to when operating in the opposite direction, the output voltage rises, the motor 30 rotates the male screw 30a forward, the rear end of the lever 23 rises, the rear ends of the floats 13 and 14 rise, and it moves slightly to the deep planting side. Will be corrected. When the mud is hard, the procedure is reversed from the above, and the rear parts of the floats 13 and 14 are lowered to adjust to the shallow planting side.

As described above, when the paddy field has a deep shallow depth, the front side of the float 13 moves 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 the seedlings are kept at a certain height from the mud surface, the planting depth of the seedlings by the seedling planting tool 12 is made uniform regardless of the depth of the plow. When the sensitivity adjustment lever 32 provided on the traveling vehicle body 1 is operated to adjust the control state by the hardness of the mud in the field, the correction mechanism A simultaneously moves the support shaft 48 at the rear of the float 13 up and down. Since the planting depth of the seedlings is corrected by changing the sensitivity, the planting depth of the seedlings automatically becomes appropriate regardless of the sensitivity change. Furthermore, when it is desired to adjust the degree of correction under other field conditions or the like, the right end of the rod 45 of the adjusting section B is replaced with the hole 50 of the adjusting plate 44. The amount of rotation can be adjusted, and a desired planting depth correction degree suitable for the field conditions can be obtained.

[Brief description of drawings]

FIG. 1 is a side view of a main part of a seedling planting machine according to the present invention, and FIG.
The drawing is a hydraulic circuit diagram thereof, FIG. 3 is an enlarged perspective view of a part thereof, FIG. 4 is a block circuit diagram thereof, and FIG. 5 is an electric circuit diagram thereof. Explanation of reference numerals 1 ... Running vehicle, 4 ... Wheels 9 ... Seedling planting device, 12 ... Seedling planting equipment 13 ... Float, 18 ... Driving device 32 ... Operating lever (sensitivity adjusting lever), 48 ... … Spindle A …… Correction mechanism, B …… Adjuster

Claims (1)

[Claims] 1. A traveling vehicle body 1 in which wheels 4 roll and propel on a cultivating paddy of a paddy field, a seedling planting device 9 mounted on the rear part thereof and a float 13 gliding on a mud surface of the paddy field, and a seedling planting device. The float 13 is provided with a drive device 18 for maintaining a predetermined height with respect to the mud surface, and the support shaft 48 of the rear part of the float 13 moves up and down to adjust the seedling planting depth of the seedling planting tool 12. At the same time, when the depth of the cultivator fluctuates, the front side moves up and down and the drive device 18 is activated by the signal, and the traveling vehicle body 1
The operation of the operation lever 32 for changing the seedling planting working conditions provided on the upper and lower sides moves the support shaft 48 at the rear part of the float 13 up and down to correct the planting depth of the seedlings by changing the working conditions to obtain a proper planting. A correction mechanism A for changing the planting depth is provided, and an adjusting unit B for adjusting the degree of correction of the planting depth in the correction mechanism A.
A seedling planting machine characterized by being provided with.