JP4872807B2 - Seedling planting machine - Google Patents

Description

The present invention relates to a seedling planting machine that is provided with a culm height detection device and that plants and travels a seedling across a field culm .

  A seedling planting machine provided with a cocoon height detection device disclosed in Patent Document 1 is known. This seedling planting machine is equipped with a seedling planting device mounted on a traveling machine that can travel across the fence, planting the seedling planted by the operator along the fence, and coming to the end of the fence. If this happens, the operator changes the direction of the aircraft and resumes planting of the seedlings for the adjacent cocoons.

In this case, the kite height detection device detects a change in the inclination of the pointing arm integrated with the grounding unit that is disposed between the left and right drive wheels and follows the grounding surface of the kite, so The planting depth can be constantly adjusted, and the operator during the seedling feeding operation can be notified by buzzer ringing control at the end position of the cocoon.
JP 2002-305921 A

  However, since the grounding sensor is configured to detect the inclination angle of the indicating arm that changes in inclination according to the height of the saddle, the angle detecting unit detects the inclination angle of the indicating arm beyond the detection range due to the backward movement of the aircraft. There was a problem that the detector main body was damaged.

  The problem to be solved is that the height of the cocoon is detected in the seedling planting traveling across the cocoon, and it is not damaged by the backward traveling of the aircraft, and it does not require any special operation in the forward traveling again. An object of the present invention is to provide a cocoon height detection device for a seedling planting machine that can detect the cocoon height.

The invention according to claim 1 is provided with a traveling body, a planting mechanism for planting a seedling in a field, a pressure reducing wheel, a seedling box frame, and a steering handle, and an angle for detecting a rotation angle within a predetermined angle range. Seedling planting provided with a heel height detection device comprising a detection arm provided with a detection portion and pivotally supported, and a grounding portion that follows the upper surface of the heel during the forward travel of the aircraft by a tilting operation of the indication arm In the attached machine , the saddle height detection device is provided with a support shaft below the indicating arm, and the support arm supports the lower arm so that it can be folded in the forward direction of the machine body. The grounding unit is integrated with the lower arm. A return spring that acts as a return moment in the direction of pulling back the lower arm that turns and bends is constructed between the indicator arm and the return spring moves as the lower arm is turned. Up to the above spindle Characterized in that the formation of the extension to extend the end.

The indicator arm is tilted by the grounding unit during forward travel according to the height of the saddle, and the height of the grounding unit is detected from the tilting angle via the angle detection unit. If an acting force exceeding the return spring's return moment is received via the grounding section, it will be pivoted forward in the middle, and in this case, even if the return spring moves, it will interfere with the extension of the support shaft, thereby When the direction is maintained and the acting force is released by the forward traveling again, the lower arm is returned to its original position by the return moment of the return spring, and the height of the kite can be detected.
The invention according to claim 2 is characterized in that a lift arm that lifts the pressure reducing wheel by being moved rearward and upward is provided.
By moving the lift arm rearward and upward, the weight moves backward when the pressure wheel is raised.
The invention according to claim 3 is characterized in that the seedling box frame is suspended so as to be swingable back and forth, and a tank is provided at the lower part of the seedling box frame.
When the machine is lifted, the seedling box frame is kept horizontal and the tank moves.

According to the configuration of the first aspect, the lower arm integrated with the grounding portion is pivoted forward so as to be able to be returned by the return spring, and the movement of the return spring is restricted by the extension portion of the support shaft, so that the return moment is reduced. Since the direction is maintained, the planting height detecting device of the seedling planting machine detects the height of the planting by following the upper surface of the planting during forward traveling, and during backward traveling, Excessive rotation of the indicating arm is prevented to prevent the angle detection unit from being damaged, and the height detection can be resumed without any special return operation by forward traveling again.
According to the second aspect of the present invention, when the pressure wheel is raised, the weight moves rearward, so that it is possible to reduce the load of pushing down the steering handle.
According to the configuration of the third aspect, the seedling box frame is kept horizontal when the aircraft is lifted, and the seedling can be stably mounted and traveled. Further, since the tank also moves during the airframe lift, the airframe can be easily turned and the operability can be improved.

Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings.
FIG. 1 is a side view of a seedling planting machine to which a planting apparatus according to the present invention is applied. In the following description of the illustrated examples, when referring to the front or rear, the engine side is “front”, the steering handle side is “rear”, and when referring to the right or left, the front side of the body is facing toward the rear of the body. The right hand side as viewed from the operator is “right”, and the left hand side is “left”.

  The seedling planting machine constitutes a traveling machine body capable of traveling on a field by a machine body frame 4 provided with left and right drive wheels 2 and 2 and left and right front wheels 3 and 3 for guiding and supporting the tip of the machine body. The planting unit loaded on the machine body frame 4 is intended to plant the seedlings received from the operator to a predetermined position by a circular movement mechanism 5 and the seedlings from the circular transfer mechanism 5 to be planted in the field. The planting mechanism 6, 6 that moves up and down and the left and right pressure-reducing wheels 8, 8 that are backfilled below the planting mechanism 6, 6 are mounted.

  Further, the body frame 4 is integrally formed with a transmission transmission unit 11 integrated with the engine at the front part thereof, and the work seat 12 facing the circulating transfer unit 5 above the transmission transmission unit 11 and a seedling box in the vicinity thereof. A frame 13 is mounted. A steering handle 14 is extended at the rear of the aircraft frame 4. The steering handle 14 is configured to be able to perform a direction change operation by floating the front part of the airframe, and an operation system such as an engine throttle, a traveling clutch, and a planting clutch is centrally arranged.

  The transmission transmission unit 11 includes arm-like left and right traveling transmission support units 15 and 15 that can be rotated up and down while transmitting to the left and right drive wheels 2 and 2 on both sides thereof, so that the support height of the airframe can be adjusted. In addition to the configuration, the rear circular transfer mechanism 5 and the planting mechanisms 6 and 6 are connected to supply driving synchronous driving power. In addition, a heel height detection device 17 is provided on the body frame 16 at the front end portion of the transmission 11 in order to inform the seedling worker that the body has reached the end of the heel.

(畝 height detector)
The heel height detecting device 17 will be described in detail. The heel height detecting device 17 includes a support shaft 22a provided on the body frame 16 as shown in an enlarged side view (a) of FIG. 2 and a front view (b) thereof. Is supported so as to suspend the indicating arm 22 so as to be rotatable. The indicating arm 22 includes an angle detection unit (not shown) that detects a rotation angle within a predetermined angle range via a support shaft 22a and the like, and is configured to be able to detect a tilt angle position. The lower arm 23 is pivotally supported at the front side of the lower arm 23 so that it can be folded in the middle, and a grounding portion 24 that contacts the upper surface of the heel is integrally formed at the lower end of the lower arm 23 by a rollable roller or the like.

  In the lower arm 23, a return spring 25 is applied between the indicating arm 22 and a moment is applied in a direction to return the middle turning to the original state. One end of the support shaft 23a of the lower arm 23 is extended to the range in which the return spring 25 moves to form an extension 23b. In addition, stoppers 22b and 22b for restricting the rotation range of the indicating arm 22 are provided so as to project at positions corresponding to the detection range of the angle detection unit. In addition, the lower arm 23 is provided with a stopper 26 with an adjustment that regulates the angular position with respect to the indicating arm 22 in order to adjust the height detected by a buzzer notification or the like.

  The indicator arm 22 of the kite height detection device 17 having the above configuration is tilted by the grounding unit 24 according to the kite height during forward traveling, and the height of the grounding unit 24 is detected via the angle detection unit based on the tilt position. Is done. When the lower arm 23 receives an acting force that exceeds the return moment of the return spring 25 via the grounding portion 24 due to the backward running, the lower arm 23 is pivoted forwardly. When the rotation angle is large, even if the return spring 25 moves as the fulcrum moves, the return spring 25 interferes with the extension 23b at one end of the support shaft 23a to restrict further movement, and as a result, the direction of the return moment Is maintained, and the magnitude of the moment is substantially constant, so that it can be smoothly bent and rotated. When the acting force is released by the forward traveling again, the lower arm 23 is returned to its original state by the return moment of the return spring 25, and the height of the kite can be detected.

  Therefore, the heel height detecting device of the seedling planting machine detects the heel height by following the upper surface of the heel during forward traveling, and the indicator arm 22 is excessively rotated by turning the lower arm 23 during backward traveling. Thus, the angle detector can be prevented from being damaged, and the reed forward travel can detect the height of the kite without any special return operation. Further, the interference regulating means of the return spring 25 can be configured without requiring a special member by the extension 23b at one end of the support shaft 23a having a simple configuration.

(Another configuration example)
Next, another configuration example of the heel height detection device will be described. In the following description, the same members as those described above are denoted by the same reference numerals, and description thereof is omitted.
As shown in the side view of the main part of FIG. 3, the kite height detecting device is pivotally supported so as to suspend the support spring 31 by a support shaft 31 a provided on the body frame 16, and a lower portion of the support spring 31. In this case, the grounding portion 24 in contact with the upper surface of the bag is integrally formed by a rollable roller or the like.

  By applying a coil spring whose pretension is set by close contact formation, the support spring 31 is elastically deformed when subjected to a force exceeding the pretension, thereby ensuring normal detection accuracy. It is also possible to cope with lateral force.

  Further, as shown in an enlarged side view (a) and a front view (b) of the main part in FIG. 4, a support shaft 22a is provided on the attachment 16a attached to the body frame so that the indicating arm 22 is suspended. The instruction arm 22 is provided with a roller 24 at the lower end thereof, and a stopper pin 41 is projected at a position where the attachment arm 16a interferes with the front limit of rotation.

  The attachment 16a functions as a stopper during normal use by making the portion with which the stopper pin 41 abuts into the inclined portion 16b, and the indicator arm 22 is rotated in the reverse direction in the case of reverse running of the machine body. The stopper pin 41 is bent along the inclined portion 16b, the tip end side of the stopper pin 41 is detached from the switch arm 42, and the buzzer is sounded by the control. In this way, damage to the switch 43 itself can be avoided.

  In the above configuration, the stopper pin 41 can be easily detached from the switch arm 42 when the stopper pin 41 is subjected to a bending action by making the length L2 on the switch arm 42 side longer than the length L1 to the inclined portion 16b. Therefore, the buzzer can be continuously sounded in a state where the sensing position is out of order due to the bending.

(Pressure wheel device)
As shown in the side view of the main part of FIG. 5, the pressure-reducing wheel device is constructed by attaching a weight 52 to the upper part of the pressure-reducing wheel rod 51 extending above the pressure-reducing wheels 8 and 8 and inserting the weight 52 from the upper part. Exchange work can be easily performed. The lift arm 53 of the pressure-reducing wheels 8 and 8 is configured to move rearward and upward of the fuselage so that the weight 52 moves rearward when the pressure-reducing wheels 8 and 8 are raised. Can be reduced. Moreover, when the pressure-reducing wheels 8 and 8 are raised, the pressure-reducing wheels 8 and 8 are slid rearward by the slide arm 54, so that the pressing load of the handle 14 can be reduced as described above. Since the pressure-reducing wheels 8 and 8 slide rearward during the lift, the hopper does not hit the pressure-reducing wheels 8 and 8 even if the lift amount is large.

(Seedling box frame)
As shown in the side view of the main part of FIG. 6, the seedling box frame 13 on which the seedling box is placed is fixedly supported by the chain case 15c of the traveling transmission support portion 15 so that the chain case 15c is lifted when the machine body is lifted. Since the support column 61 is inclined rearward in response to the rising, the balance point is moved rearward, and the load of pushing down the handle 14 can be reduced.

  By providing a fulcrum 62 on the upper part of the seedling box frame 13 so as to swing back and forth at the upper end position of the support 61, the main body part of the seedling box frame 13 is horizontal even when the chain case 15c is inclined during the lift of the machine body. The seedlings can be stably mounted and traveled. In this case, since the total weight of the seedling box frame 13 is applied to the fulcrum 62, the balance point at the time of lift can be moved to the rear part of the machine body (the arm is long). Further, by attaching a damper 63 to the seedling box frame 13 and connecting it to the support 61, the seedling box frame 13 can be prevented from shaking and stabilized.

  Another support structure of the seedling box frame 13 is that the seedling box frame 13 is always horizontal by being suspended by springs 64, 64 in the front-rear direction from the upper end of the support 61 as shown in the side view of the main part of FIG. The seedling box is stabilized, and even if the body is shaken when the body is swung, the seedling box is absorbed by the springs 64 and 64, so that the seedling box can be prevented from falling. Further, when the seedlings in the seedling box frame 13 are reduced as the planting operation progresses, the height position moves upward, so that the lower seedling can be easily taken out. The seedlings can be handled easily by using seedlings from above the seedling box frame 13 and putting them from below.

  By applying a damper instead of the springs 64, 64 in the above configuration, the swinging up and down and up and down can be attenuated, so that the seedling can be stably supported. The tank 65 is attached to the lower portion of the seedling box frame 13 so that the weight of the tank 65 is also moved rearward when the machine is lifted, so that the machine can be easily turned. The seedling including the weight of the tank 65 is also included. Since the vertical movement of the box frame 13 is affected, the operability can be improved by the large vertical movement amount.

  Further, as shown in the side view of the main part of FIG. 8, the support structure of the seedling box frame 13 supports the seedling box frame 13 by a link 66 attached to the chain case 15c and a link 67 offset forward, Even when the machine body is lifted, the seedling box frame 13 is held in parallel with the machine body. In this case, the seedling box frame 13 moves rearward and becomes rear balance, so that the load of pushing down the handle 14 can be reduced. Further, since only the pulling load is applied to the front link 67, it can be constituted by a low-cost thin rod member.

  Still another support structure for the seedling box frame 13 is that, as shown in the side view of the main part of FIG. 9, by attaching one of the front and rear links 66 and 67 to the arm wheel, 13 can be held without tilting. In this case, the distance L1 between the upper ends of the links 66 and 67 is set to be longer than the distance L2 between the lower end of the link 67 and the rotation center 15a of the travel transmission support 15 so that the aircraft can move forward when the aircraft is lifted. Even if the seedling box frame 13 is tilted, the seedling box frame 13 tilts backward, so that the seedling can be prevented from falling.

  As shown in a side view (a) and a partially enlarged view (b) of the main part of FIG. 10, the guide wire 71 has an outer 71 a pulling direction on the inner side with respect to the tangent line of the rotation arc T of the arm 72. By directing the wire, the wire can be pulled straight without bending, so that the wire can be prevented from being damaged.

It is a side view of a seedling planting machine. It is the principal part enlarged side view (a) and its front view (b) of a heel height detection apparatus. It is a principal part side view of another structural example of a heel height detection apparatus. It is another principal part enlarged side view (a), and its front view (b). It is a principal part side view of a pressure-reducing wheel apparatus. It is a principal part side view of a seedling box frame. It is a principal part side view of another support structure of a seedling box frame. It is a principal part side view of another support structure of a seedling box frame. It is a principal part side view of another support structure of a seedling box frame. It is the principal part side view (a) of the guide wire, and its partial enlarged view (b).

Explanation of symbols

2 Driving wheel 3 Front wheel 4 Airframe frame 5 Circumferential transfer mechanism 6 Planting mechanism 14 Steering handle 16 Airframe frame 17 Height detector 22 Pointing arm 22a Support shaft 22b Stopper 23 Lower arm 23a Support shaft 23b Extension section 24 Roller (grounding section)
25 Return spring

Claims (3)

A traveling machine, a planting mechanism (6) for planting seedlings in a field, a pressure ring (8), a seedling box frame (13), and a steering handle (14) are provided, and the rotation angle is within a predetermined angle range. An indicating arm (22) provided with an angle detecting unit for detecting the rotation and pivotally supported, and a grounding portion (24) that follows the upper surface of the kite during the forward travel of the aircraft by the tilting operation of the indicating arm (22) In a seedling planting machine provided with a heel height detection device consisting of
The kite height detecting device is provided with a support shaft (23a) at the lower portion of the indicating arm (22), and the lower arm (23) is supported by the support shaft (23a) so that it can be folded in the forward direction of the machine body. arm the grounding unit (24) as well as an integral part of the (23), and instructs the arm return spring (25) acting the return moment in a direction to retract the lower arm (23) to the seat back tilting pivot (22) An extension portion (23b) was formed by extending one end of the support shaft (23a) to the extent that the return spring (25) moved as the lower arm (23) was bent and rotated. A seedling planting machine characterized by that. The seedling planting machine according to claim 1, further comprising a lift arm (53) for lifting the pressure-reducing wheel (8) by being moved rearward and upward. The seedling planting machine according to claim 1, characterized in that the seedling box frame (13) is swingably held back and forth, and a tank (65) is provided at a lower portion of the seedling box frame (13).

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