JP3584659B2 - Seedling plant - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is used for a seedling plant in which a seedling plant is mounted on a general-purpose traveling vehicle body.
[0002]
[Prior art]
A hitch of a seedling transplanter is attached to a hitch of a general-purpose traveling vehicle body that moves up and down by a drive device (hydraulic cylinder) to form a seedling transplanter (rice transplanter). The seedling plant has a sensor float that slides on a mud surface, and when the input from the sensor changes due to the vertical movement of the tip of the sensor float, the control device causes the piston rod to protrude and retract, and the seedling plant is automatically raised and lowered. Is configured. Further, when the seedling plant is lifted from the mud surface, an input of “raise” is generated by a manual operation of the sensor.
[0003]
[Problems to be solved by the invention]
The above sensor is provided with a manual operation lever for generating an input of "raise", and after the seedling planting device is mounted on the traveling vehicle body, the operation lever is mounted on the traveling vehicle body. Therefore, the operation lever needs to be attached and detached, the configuration is complicated, and the operation is complicated.
[0004]
[Means for Solving the Problems]
According to the present invention, a hitch 16 of a seedling plant 2 is detachably attached to a hitch 14 of a traveling vehicle body 1 which moves up and down by a driving device 15 for solving the above-mentioned problem, and the tip of the seedling plant 2 moves up and down. While the sensor float 41a slides on the mud surface and the sensor 46 which operates by the vertical movement of the sensor float 41a, the control device outputs to the drive device 15 by the change of the input from the sensor 46 reaching the control device, and moves the seedling plant 2 up and down. A manual operation lever 50 is provided on the hitch 16 on the side of the seedling plant 2 so that the driving device 15 generates an input for raising the seedling plant 2 on the sensor 46.
[0005]
【Example】
Next, an embodiment of the present invention will be described.
A seedling plant 2 is mounted on a traveling vehicle body 1 to form a seedling plant (rice planting machine) (FIG. 1).
The traveling vehicle body 1 is configured as follows. A front axle housing 4 and a rear axle housing 5 are horizontally arranged before and after the gear box 3, and sleeves 4a and 5b extend downward from both ends thereof, and a front wheel 6 and a rear wheel 7 are attached to respective lower ends. A frame 8 is provided on these, and the rotational power of an engine (not shown) in a hood 9 at the front reaches a front wheel 6 and a rear wheel 7 via a transmission in a gear box 3. These are rotated on the cultivator of the paddy field so that the traveling vehicle body 1 moves forward. A seat 10 is provided on the rear wheel 7, and when the steering wheel 11 in front of the seat 10 is operated, the front wheel 6 is steered and the course of the traveling vehicle body 1 is changed.
[0006]
A bracket 12a protrudes forward from the rear axle housing 5 (FIG. 2), and a lower front portion of a cross-shaped arm 13 is rotatably mounted by a pin 13a. A U-shaped hitch 14 is fixed to the rear end of the arm 13. When the driving device 15 is composed of a hydraulic cylinder 15a and a piston rod 15b projecting backward from the hydraulic cylinder 15a, the front and rear ends are attached to the bending portion of the arm 13 and the rear portion of the frame 8, and the oil discharged by the pump is supplied to the hydraulic cylinder 15a. When the piston rod 15b protrudes, the arm 13 rotates counterclockwise around the pin 13a and the hitch 14 rises, and when the oil is returned to the tank, the arm 13 rotates in reverse and the hitch 14 descends. I have. The arm 13 is made of a pair of left and right plates, a single hitch 14 is fixed, and a pair of hydraulic cylinders 15 can be attached to each arm 13. The hitch 14 can be mounted with a cultivator or other agricultural working machine.
[0007]
The seedling plant 2 (and its related components) is provided as follows. A hitch 16 is detachably attached to the hitch 14 with a pair of pins 17 (FIG. 2). A rod 18a protrudes downward from the hitch 16, and a rear end of a link 18b extending rearward from the lower end thereof is rotatably attached to the lifting frame 19 with a pin 19a. A pair of left and right brackets 12b extend downward from the rear axle housing 5, and both ends of a pair of left and right lower links 20 are detachably attached to pins 21a and 21b at a lower portion of the bracket 12b and a lower portion of the elevating frame 19, respectively. The arm 13, the rod 18a, and the link 18b serve as a top link. A three-point link is formed by the arm 13, the rod 18a, and the link 18b. When the arm 13 swings with the hydraulic cylinder 15a as described above, the lifting frame 19 becomes the same. It is made to go up and down while maintaining such a posture.
[0008]
When the spring 22 (FIG. 2) is mounted between the hitch 16 and the rod 18a, when the lifting frame 19 moves up and down, the impact on the seedling plant 2 mounted on the lifting frame 19 is reduced. That is, the lower tray 23 is fixed to the hitch 16, and the upper portion of the rod 18a is slidably inserted. An upper tray 24 is fixed to the upper end of the rod 18a with a nut, and the upper and lower portions of the spring 22 are sandwiched between the respective trays 23 and 24. The guide cylinder 25 is fixed to the hitch 16 and the upper receiving tray 24 moves up and down therein. Therefore, when the hitch 14 and the hitch 16 rise, the force of the lower tray 23 reaches the upper tray 24 via the spring 22 and the rod 18a rises, so that the impact between the hitch 14 and the rod 18a is applied to the spring 22. Absorbed and relaxed.
[0009]
V-shaped receiving portions 26a and 26b are provided on the upper and lower portions of the lifting frame 19, respectively. The upper pin 28a and the intermediate pin 28b of the seedling frame 27 are received by the respective receiving portions 26a and 26b, and the hooks 29 draw the pins 28b to fix the seedling frame 27 to the elevating frame 19.
A seedling plant gear box 30 is attached to the lower end of the seedling plant frame 27 so as to be swingable by a rolling shaft 31 extending in the front-rear direction. A plurality of seedling-planting frames 32 extend rearward from the seedling-planting gear box 30, and rotating cases 33 are provided on both sides of each rear end. An L-shaped seedling receiving plate 34 is fixed to the seedling planting frame 32. A pair of columns 35 extend upward from the front portions of the seedling frames 32 on both sides, and the seedling mounting table 37 is supported by the slider 36 at the upper end and the rear portion of the seedling receiving plate 34 so as to be movable left and right.
[0010]
An auxiliary case 38 is provided on the traveling body 1, and both ends of a propeller shaft 39 are detachably attached to an output shaft of the traveling body 1 and an input shaft of the seedling gear box 30. Has been introduced within. A part of the power reaches each rotating case 33 through the seedling frame 32 and rotates counterclockwise around a central horizontal axis, and another part passes through a lead cam. To reach the seedling mounting table 37, which is reciprocally driven left and right. A plurality of mat-shaped group seedlings are placed side by side on the seedling mounting table 37, and the rear ends of the seedlings protrude above the seedling receiving plate 34 and move left and right.
[0011]
A pair of implantation rods 40 are attached to the respective rotating cases 33, rotate while maintaining the same posture during the rotation by the planetary gears, and alternately open the seedling openings of the seedling receiving plate 34 at the beginning of the downward rotation. The seedlings of one strain are removed from the above-mentioned group seedlings, and transplanted to mud at the lower end.
A plurality of floats 41 are arranged side by side, and their rear portions are rotatably attached by pins 44 to the rear ends of arms 43 extending obliquely downward from the rotation shaft 42, and the front end is moved up and down as the traveling body 1 advances. While sliding on the muddy surface. Each float 41 has a front portion projecting sideways, and the projecting portion of the planting rod 40 transplants the seedlings in advance so that the projecting part is leveled.
[0012]
The center float 41 is a sensor float 41a. A support frame 45 extends forward from the seedling plant gear box 30, and a potentiometer (sensor) 46 is attached to the protruding end (FIG. 3). The auxiliary frame 45a protrudes downward from the support frame 45, and the middle of a U-shaped lever 47 is rotatably attached by a pin 47a. The arm 46a of the potentiometer 46 and the tip of the lever 47 are connected by a rod 48, and the rear end of the lever 47 and the front of the sensor float 41a are connected by a link 49.
[0013]
The potentiometer 46 is detachably connected to the control device of the traveling vehicle body 1 so that the control device outputs to a valve to switch an oil passage from the pump to the hydraulic cylinder 15a. That is, when the sensor float 41a is in the standard posture, the valve is "neutral", the oil is closed in the hydraulic cylinder 15a, and the height of the seedling plant 2 is kept constant. When the traveling vehicle body 1 comes to a deep place of the tillage, the distance between the seedling plant 2 and the mud surface becomes narrow, and the seedlings are deeply planted. At this time, the front part of the sensor float 41a is pushed up by the mud surface, and the front part rises. Then, the link 49 pushes the lever 47 counterclockwise, and the lever 46a rotates in the same direction with the rod 48. With the rotation of the lever 46a, the input from the potentiometer 46 changes, the control device operates the valve, oil is supplied to the hydraulic cylinder 15a, the hitch 14 and the seedling plant 2 rise, and the planting depth of the seedling decreases. Return to standard. Conversely, when the traveling vehicle body 1 comes to a place where the tillage is shallow, the seedling-planting device 2 is raised from the mud surface and the seedlings are planted shallowly. At this time, the rear part of the sensor float 41a is pulled up from the mud surface by the pin 44, and the front part is lowered. Then, the link 49 pulls the lever 47 clockwise, and the lever 46 a rotates in the same direction with the rod 48. With the rotation of the lever 46a, the input from the potentiometer 46 changes, the control device operates the valve, the oil in the hydraulic cylinder 15a returns to the tank, the hitch 14 and the seedling plant 2 descend, and the planting depth of the seedling. Returns to standard. As described above, the hitch 14 is automatically moved up and down by the change of the input from the potentiometer 46, and the planting depth of the seedling is kept within a certain range even if the cultivator has a shallow depth.
[0014]
The operation lever 50 is attached to the hitch 16, the arm 50a thereof is connected to the pin 49a at the upper end of the link 49 by a wire 51, and when the operation lever 50 is turned counterclockwise, the tip of the sensor float 41a is pulled up. Has become. When the sensor float 41a is pulled up by the operation lever 51, the input from the potentiometer 46 changes and the hitch 14 (the seedling plant 2) rises as described above. When the operation lever 50 is slightly returned from that position and latched, the valve becomes "neutral" and the seedling plant 2 stops at the raised position. When turned clockwise, the seedling plant 2 descends.
[0015]
According to the following configuration, the seedling plant 2 rotates counterclockwise at the end point of the ascent, and the rear end jumps up. Therefore, the rear end of the seedling plant 2 can be largely lifted up by a small amount of rise of the hitch 14 (elevation frame 19), and contact with the ridge can be prevented when turning on a headland or the like.
That is, as shown in FIG. 4, the lower link 20 is divided into a front part 20a and a rear part 20b, the front part 20a is made of a square tube, the rear part 20b is inserted into the tube from the rear end, and both are pulled by the spring 52, The front end of the front part 20a and the rear end of the rear part 20b are connected to the respective pins 21a and 21b. As shown in FIG. 2, the front end of the pulling link 53 is attached to the upper pin 17, and the pin 28a is inserted into the long hole 53a at the rear end. As the lifting frame 19 rises, the link 18b rotates counterclockwise around the pin 19a, and the interval between the upper pin 17 and the pin 28a increases. When the elevating frame 19 moves up to a predetermined position, the pin 28a hits the rear end of the long hole 53a. Therefore, when the elevating frame 19 is further raised, the elevating frame 19 is pulled by the pulling link 53, and the lower link 20 is pulled out from the front portion 20a against the spring 52 so as to extend and extend around the pin 19a. The rear part of the seedling-planting device 2 pivots counterclockwise and jumps up greatly.
[0016]
The receiving member 70 is fixed to the rear lower surface of the lower link 20 (FIG. 2). A cushion 71 in which a spring 71a is mounted is attached to a supporting rod 72 protruding forward from a lower end of the seedling planting frame 27. When the lifting frame 19 is raised by the protrusion of the piston rod 15b and reaches the end point, the cushion 71 is received. The ascent is stopped so as to hit the tool 70.
[0017]
According to the above configuration, the hitch 16 is attached to the hitch 14 with the pin 17, the both ends of the pair of lower links 20 are attached to the respective pins 21a and 21b, the both ends of the propeller shaft 39 are attached to the output shaft and the input shaft, and the potentiometer 46 is attached. Is connected to the control device, a seedling transplanter (rice transplanter) is completed. If this is removed in reverse, the traveling vehicle body 1 becomes independent, and various working machines can be mounted on the hitch 14 thereof.
[0018]
The lifting operation device can be configured as shown in FIG. That is, the position lever 54 is provided on the traveling vehicle body 1, the arm 55 a is rotated by the operation, and the input reaching the control device 57 from the potentiometer 55 via the switch 56 is changed. The potentiometer 46 is detachably connected to the switch 56, and the input from the potentiometer 55 or the potentiometer 46 can be selected by operating the lever 56a. The valve 58 is operated by the output of the control device 57, and the oil discharged from the pump 59 is sent to the hydraulic cylinder 15a (up), the oil in the hydraulic cylinder 15a is returned to the tank 60 (down), and the oil is returned to the hydraulic cylinder 15a. Closed (neutral). During the seedling planting operation, the seedling planting apparatus 2 is automatically moved up and down using the input from the potentiometer 46 by the selection by the lever 56a. When the seedling plant reaches the headland and raises the seedling plant 2 significantly, the lever 56a is operated to switch to the input from the potentiometer 56, and then the position lever 54 is operated to the "up" position. . Then, the seedling-planting device 2 is raised high from the mud surface.
[0019]
The rear wheel 7 (or the front wheel 6) is configured as shown in FIGS. A bowl-shaped boss 61 is fixed to the flange of the axle. Five spokes 62 protrude radially from the boss 61, and each protruding end is fixed to a ring-shaped rim 64 via a joint plate 63. The rim 64 is made of a pipe. The rim 64 is covered with rubber to form a donut-shaped tire 65. A chevron lug 65a is formed integrally with the outer periphery of the tire 65. The left and right lugs 65a are arranged alternately. A plurality of pipes 66 are arranged at equal intervals through the rim 64 and the tire 65, and the gate-shaped legs 67 a of the auxiliary lugs 67 are detachably attached with pins 68 inserted into the respective pipes 66. In manufacturing, the tire 65 and the lug 65a can be simultaneously formed by welding rubber to the rim 64 through a pipe 66 and then molding them. The front surface of the rotation of the leg 67a is formed of the plate 67b to form an auxiliary lug 67. According to this configuration, it can be used without using the auxiliary lug 67 in a normal field, and can be used by attaching the auxiliary lug 67 in a wetland. If an extra-large auxiliary lug 67 is provided, when a wheel sinks in a wetland, the wheel can be attached and escaped.
[0020]
【effect】
As described above, according to the present invention, the manual operation lever 50 for raising and lowering the seedling plant 2 using the driving device 15 of the traveling vehicle body 1 is provided on the hitch 16 on the side of the seedling plant 2. When removing the seedling plant 2 from the vehicle body 1, it is not necessary to remove the operation lever 50. Therefore, the configuration is simple and the operation is simplified.
[Brief description of the drawings]
1 is a side view of a seedling planting machine according to the present invention [FIG. 2] An enlarged side view of a part thereof [FIG. 3] An enlarged side view of a part thereof [FIG. 4] A plan view of a part thereof FIG. 5 is a block circuit diagram of another lifting device. FIG. 6 is a side view of a part of the wheel. FIG. 7 is a cut-away front view.
DESCRIPTION OF SYMBOLS 1 Running vehicle body 2 Seedling plant 14 Hitch 15 Drive 16 Hitch 41a Sensor float 46 Sensor 50 Operating lever

Claims (1)

The hitch 16 of the seedling plant 2 is detachably attached to the hitch 14 of the traveling vehicle body 1 ascending and descending by the driving device 15. The control device is provided such that the control device outputs to the drive device 15 and moves the seedling plant 2 up and down in response to a change in the input from the sensor 46 that reaches the control device. 2. A seedling plant in which a manual operation lever 50 for causing the sensor 46 to generate an input for raising the position 2 is provided on the hitch 16 on the seedling plant 2 side.

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