JP2010161934A - Rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the structure simplification, cost-down and planting performance improvement of a rice transplanter in which seedling trays 12 and planting units 11 for scratching out seedlings for each root from seedling mats on seedling trays to plant the seedlings in a field surface are disposed in a planting apparatus 5 connected to a travel machine frame 2, and the planting units each has a planting rotator 16 rotated on a planting shaft, and planting fingers 18 attached to the planting rotator to rotate on a finger shaft 17 parallel to the planting shaft. <P>SOLUTION: The planting fingers 18 are rotated with electric motors 24 disposed in the planting rotator 16 so that the planting fingers are once rotated during one rotation of the planting rotator 16 in the reverse direction, and the electric motors 24 are rotated at irregular speeds so that the rotation speeds of the planting fingers 18 are reduced at a phase near to the front or rear position of a lower dead point in the planting rotator 16 during one rotation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rice transplanter, and more particularly, to a planting device that is connected to a traveling machine body so as to be movable up and down, a seedling stage that supports a seedling mat, and a seedling for one stock from the seedling mat of the seedling stage. The present invention relates to a rice transplanter provided with a rotary type planting unit that scrapes off the plant to be planted in a field.

  Conventional rotary planting units are well known, and, for example, as described in Patent Document 1 and Patent Document 2, etc., a hollow body on a planting shaft that is pivotally supported by a transmission case in a rice transplanter. The planting rotator is fixed to the planting rotator, and the planting claw is attached to the planting rotator so that the planting claw is rotated about a claw axis parallel to the planting axis. An interlocking mechanism is provided between the planting shaft and the claw shaft in the interior so that the planting claw rotates once in the opposite direction during one revolution of the planting rotating body, and the planting claw body The split claw is configured to reciprocate between the seedling stage and the field scene in a posture facing the direction of the seedling stage that is positioned forward.

  The interlocking mechanism is configured as an inconstant speed interlocking mechanism using a plurality of non-circular gears so that the planting claw body rotates once in the reverse direction along with the one revolution in the planting rotating body. Is slowed down in a phase around the bottom dead center in the planting claw body during one rotation of the planting claw body, so that the tip of the divided claw in the planting claw body moves in an elliptical closed loop that is long in the vertical direction. It is configured to draw a trajectory.

JP 2006-141323 A JP 2006-211948 A

  Conventionally, however, the structure is extremely complicated and the manufacturing cost is greatly increased by providing an inconstant speed interlocking mechanism using a plurality of non-circular gears between the planting shaft and the claw shaft. In addition, the backlash existing in the gears in the inconstant speed interlocking mechanism causes vibrations and the amount of seedling taken out from the seedling stage becomes unstable.

  In addition, the speed reduction rotation by the inconstant speed interlocking mechanism in the planting claw body is limited only to the phase around the bottom dead center during one rotation in the planting claw body, and accordingly, the tip of the split claw The overall motion trajectory at is determined based on the deceleration rotation at the phase around the bottom dead center, and as a result, the motion trajectory when the split claw passes through the seedling stage is also the phase around the bottom dead center. In the conventional inconstant speed interlocking mechanism, the split claw seedling is in the phase when it passes through the seedling stage before the phase around the bottom dead center. There was also a problem that the approach angle and the cutting angle with respect to the seedling mat on the platform could not be set to the optimum state.

  The present invention has a technical problem to solve these problems.

In order to achieve this technical problem, claim 1
“A seedling stand that supports the seedling mat and a planting unit that scrapes one seedling from the seedling mat on the seedling stand to be planted on the farm. And is provided,
The planting unit rotates around a planting shaft that rotates around a planting shaft that extends in the left-right direction intersecting the traveling direction of the traveling machine body in plan view, and rotates around a claw shaft that is parallel to the planting shaft. And a planting claw body attached to
The planting rotator is provided with an electric motor that rotates the planting claw in the opposite direction during one rotation of the planting rotator, and the electric motor has a rotational speed of the planting claw, It is the structure which rotates at an inconstant speed so that it may decelerate in the phase of the said planting rotary body in the vicinity of the bottom dead center during the rotation. "
It is characterized by that.

Claim 2
“In the first aspect of the present invention, the electric motor is built in a hollow portion formed in the planting rotary body.”
It is characterized by that.

Claim 3
“In Claim 1 or 2, the electric motor is a stepping motor.”
It is characterized by that.

Claim 4
“In any one of claims 1 to 3, the planting rotator is configured to be driven to rotate around its planting shaft by an electric motor for main driving.”
It is characterized by that.

  According to the configuration described in claim 1, the planting claw body attached to the planting rotating body can be driven by an electric motor without using an inconstant speed interlocking mechanism constituted by a plurality of non-circular gears as in the prior art. The tip of the split claw in this planting claw body rotates at an unequal speed so as to draw an elliptical closed-loop motion trajectory that is long in the vertical direction. Compared to those using an interlocking mechanism, the structure is extremely simple, and a significant reduction in price and weight can be achieved.

  In addition, since there is no backlash in the conventional gear during rotation of the electric planting claw body, vibration can be greatly reduced and the amount of seedling taken out from the seedling table can be reliably stabilized.

  In this case, the durability and safety of the electric motor can be reliably improved by incorporating the electric motor in claim 2.

  According to a third aspect of the present invention, by using a stepping motor to rotate the planting claw body, the rotational speed when the planting claw body is rotated in the opposite direction to the planting rotation body is set around the bottom dead center. Can be set separately at other phases while decelerating at the phase at, so that the seedling placement of the split nail can be carried out with the seedling planting at the phase around the bottom dead center being appropriate. The approach angle and the cutting angle with respect to the seedling mat in the platform can be brought into an optimum state.

  Furthermore, according to the configuration described in claim 4, since the planting unit in the planting apparatus can be driven to rotate independently of the traveling machine body by the main driving electric motor, the power transmission mechanism from the traveling machine body is provided. This eliminates the need for it, making the structure remarkably simple and achieving a significant weight reduction.

It is a side view of a riding type rice transplanter. It is a top view of a riding type rice transplanter. It is a side view which shows the planting apparatus in 1st Embodiment. FIG. 4 is a plan view of FIG. 3. FIG. 5 is an enlarged sectional view taken along line VV in FIG. 3. FIG. 6 is a side view of FIG. 5. The flowchart of control of a stepping motor is shown. It is a partial notch top view side view which shows the planting apparatus in 2nd Embodiment.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, drawings when an embodiment of the present invention is applied to a riding type multi-planting rice transplanter will be described.

  FIG.1 and FIG.2 shows the riding type rice transplanter 1 of 6 row planting. 3 to 6 show a first embodiment.

  The riding type rice transplanter 1 includes a traveling machine body 2 supported by a pair of left and right front wheels 3 and a rear wheel 4, and a planting device 5 attached to a rear portion of the traveling machine body 2 so as to be movable up and down. 2 is equipped with an engine 6 and a control seat 7, and is further equipped with a traveling mission 8 for appropriately shifting the power from the engine 6 and transmitting it to the wheels 3, 4. The vehicle is configured to travel forward at an appropriate speed in the direction indicated by the arrow A.

  The planting device 5 includes a main frame 9 extending in the left-right direction intersecting the traveling direction of the traveling machine body 1, and three subframes 10 provided on the main frame 9 so as to extend rearward in the left-right direction at appropriate intervals. Between the rotary planting units 11 provided on the left and right sides of each of the sub-frames 10, the seedling placing table 12 that is inclined backward and rearward so as to reciprocate left and right, and the planting units 11. The seedling table 12 and the floats 14 are supported by the main frame 9 and the subframe 10. The floats 14 are arranged to slide on the surface of the field scene 13. ing.

  Each planting unit 11 includes a planting shaft 15 that is rotatably supported at the rear end of each subframe 10 so as to extend in the left-right direction, and a hollow shape that is detachably attached to one end of the planting shaft 15. A planting rotator 16, a claw shaft 17 rotatably supported at both ends of the planting rotator 16 so as to extend in parallel with the planting shaft 15, and the planting rotator 16 of the claw shafts 17 from the planting rotator 16. A planting claw body 18 detachably attached to the projecting end so as to face the seedling mounting table 12 is provided.

  A split claw 19 configured in a chopstick shape is attached to the planting claw body 18 so as to protrude toward the seedling mount 12, and a seedling pusher 20 is provided on the split claw 19. .

  The power from the traveling mission 8 in the traveling machine body 2 is transmitted to a stock transmission mechanism (not shown) provided in the traveling machine body 2, and the main frame 9 is provided from the stock transmission mechanism via the PTO shaft 21. The power is transmitted to a power transmission mechanism (not shown), and then transmitted from the power transmission mechanism to the planting shaft 15 in the planting unit 11 through the transmission shaft 22 and the bevel gear mechanism 23 provided in the subframe 10. Thus, the planting rotator 16 in the planting unit 11 is configured to rotate (revolve) counterclockwise as indicated by an arrow B in the figure.

  The rotational speed of the planting rotating body 16 in the counterclockwise direction is slowed by the inter-strain transmission mechanism when planting seedlings on the field scene 13 is “sparse planting”, and planting seedlings on the field scene 13 is “ In the case of “dense planting”, the gears are configured to change speed as fast as possible.

  On the other hand, a stepping motor 24 configured to rotate the claw shaft 17 is provided inside the planting rotary body 16 in the planting unit 11.

  The stepping motor 24 is configured to rotate by a step unit (step angle) determined by applying a pulse signal, and the planting claw body 18 is rotated counterclockwise in the planting rotation body 16. In addition, as shown by an arrow C, it is controlled to rotate once (rotate) clockwise.

  In addition, the stepping motor 24 applies a pulse signal applied to the stepping motor 24 to a phase sensor (not shown) for each of the planting rotary body 16 and the planting claw body 18, and the “standard planting”, The rotation is controlled as described below based on a detection signal in a sensor (not shown) that detects “sparse planting” and “dense planting”.

  That is, the stepping motor 24 reduces the rotational speed of the planting claw body 18 in the clockwise direction from the phase of an appropriate angle before the bottom dead center of the planting rotation body 16 during one rotation of the planting claw body 18. The rotation is controlled at an unequal speed so as to decelerate in the phase up to an appropriate angle after the dead center, that is, in the phase around the bottom dead center. As shown, the tip of the split claw 19 in the planting claw body 18 is configured to draw an elliptical closed-loop motion trajectory 25 that is vertically long.

  In addition, the stepping motor 24 determines the rotational speed (rotational speed at the time of deceleration) at a phase around the bottom dead center of the planting rotary body 18 in one clockwise rotation of the planting claw body 18. When the rotational speed of the planting rotator 18 is slowed down to “sparse planting”, the rotational speed of the planting rotator 18 is faster than that of the “standard planting”. The rotation is controlled so that it is slower than the case of “standard planting”.

  FIG. 7 shows a flowchart of this rotation control.

  That is, in step S1, it is detected whether or not the planting rotary body 16 is in a phase around the bottom dead center. If YES, the process proceeds to step S2 and the planting claw body 18 rotates clockwise. Control to reduce the speed.

  Next, in step S3, it is detected whether or not it is “standard planting”. If it is “standard planting”, the above control is repeated. If it is not “standard planting”, the process proceeds to step S4. Whether or not “sparse planting” is detected is detected, and if it is “sparse planting”, the rotational speed of the planting claw body 18 during deceleration is increased in step S5.

  If it is not “standard planting” in step S3, the process proceeds to step S6, where it is detected whether it is “dense planting”. If it is “dense planting”, in step S7. The planting claw body 18 is controlled so as to slow down the rotational speed during deceleration.

  Note that energization of the stepping motor 24 provided in the planting rotary body 18 is performed, for example, on each of the plurality of ring-shaped electric conductors 26 provided in a portion of the claw shaft 17 in the subframe 10. The brush 27, which is non-rotatably supported on the sub-frame 10, is slidably contacted, and a wire 28 inserted between the stepping motor 24 and the ring-shaped electric conductor 26 into the claw shaft 17 is provided. It is comprised so that it may connect by electrically connecting.

  The seedling pushing tool 20 provided on the split claw 19 in the planting claw body 18 is always located at a position retracted from the tip of the split claw 19, but the split claw 19 is located in the planting rotary body 16. At the bottom dead center, the ascending operation is performed toward the front end of the split claw 19 when ascending from the position where it enters the farm scene 13 most deeply.

  That is, as shown in FIGS. 5 and 6, the planting claw body 18 is made hollow, and a cam 29 fixed to the planting rotary body 16 is provided therein, and the middle portion is pivoted by the pin 30. The seedling pusher 20 is provided by providing a worn pusher lever 31 and contacting one end of the pusher lever 31 to the cam 29 while connecting the other end of the pusher lever 31 to the upper end of the seedling pusher 20. Of the planting claw body 18 in the clockwise rotation indicated by the arrow C, only at the position where the divided claw 19 has entered the field scene 13 at the bottom dead center of the planting rotation body 16 only. It is configured to move forward by a spring 32 provided for the lever 31.

  In this configuration, the planting claw body 18 in the planting rotator 16 is opposite to the direction of the arrow B by the same rotation angle as the rotation angle of the planting rotator 16 in the direction of arrow B (revolution). By rotating around the claw shaft 17 in the direction C, the planting claw body 18 swings so that the divided claw 19 reciprocates in the vertical direction with the seedling table 12 facing the direction. .

  During the turning movement of the planting claw body 18, the rotational speed of the planting claw body 18 in the clockwise direction is decelerated at a phase around the bottom dead center of the planting rotation body 16, so Will draw an elliptical closed-loop motion trajectory 25 that is long vertically.

  Then, during the turning movement of the planting claw body 18, the split claw 17 moves from the seedling mat on the seedling platform 12 in the phase when descending from top to bottom on the side facing the top surface of the seedling platform 12. After dividing one seedling, the tip of the split claw 19 enters the field scene 13 near the bottom dead center of the lowering lower limit of the planting rotary body 16.

  At this time, the push-out lever 31 in the planting claw body 18 follows the shape of the cam 29 by the spring force of the spring 32 and rotates downward about the pin 30, so that the push-out tool 20 is divided into the split claws 19. Therefore, one seedling at the tip of the split claw 19 is planted in the field scene 13 so as to be pushed out.

  When the seedling has been planted, the pusher 20 moves backward, and at the same time, the split claw 19 moves upward so as to come out of the field scene 13.

  Then, when this rice planting operation is performed by setting the number of planted plants per 3.3 square meters as “standard planting”, the rotational speed of the planting rotating body 16 is changed to the “standard planting” by a speed change operation in the inter-strain changing mechanism. ”, The tip of the split claw 19 of the planting claw body 18 in the planting rotating body 16 draws a traveling movement locus 33 shown by a two-dot chain line in FIG. Seedling can be planted with the digging holes before and after the seedling being planted as small as possible.

  In the case of performing “dense planting” in which the number of planted plants per 3.3 square meters is larger than “standard planting” from the “standard planting” state, the rotation speed of the planting rotating body 16 is changed between the plants. While the rotation speed of the mechanism is faster than the rotation speed at the time of the “standard planting”, the phase around the bottom dead center of the planting rotating body 16 in one rotation in the reverse direction of the planting claw body 18. The rotational speed in the decelerated state is made slower than the rotational speed in the “standard planting” by the rotational control in the stepping motor 24.

  As a result, the rising of the split nail 19 from the farm scene 13 is slower than in the case of the “standard planting”, and the traveling movement locus drawn by the tip of the split nail 19 is the same as in the case of the “standard planting”. By approximating the traveling motion trajectory 33, the separation claw 19 is delayed from coming out of the field scene 13, so that the backlash of the mud by the divided claw 19 is reduced. Seedling can be planted in a state where the excavation holes before and after the planted seedling can be made as small as possible.

  Further, in the case of performing the planting with fewer planted plants per 3.3 square meters than the “standard planting” from the “standard planting” state, the rotation speed of the planting rotating body 16 is changed between the plants. While the rotation speed of the mechanism is slower than the rotation speed at the time of the “standard planting”, the phase of the planting claw body 18 in the vicinity of the bottom dead center of the planting crotch body 18 in one reverse rotation. The rotation speed in the decelerated state is made faster than the rotation speed in the “standard planting” by the rotation control in the stepping motor 24.

  As a result, the separation nail 19 from the field scene 13 rises faster than in the case of the “standard planting”, and the traveling movement locus drawn by the tip of the division nail 19 is the same as in the case of the “standard planting”. Since the division claw 19 quickly comes off from the field scene 13 and rises to approximate the traveling movement locus 33, the forward drag of the field scene 13 by the division claw 36 becomes smaller. Seedling can be planted in a state where the excavation holes before and after the planted seedling can be made as small as possible.

  In the above embodiment, the “standard planting” is sandwiched to switch between “dense planting” and “sparse planting”, but the “sparse planting” is switched to “dense planting”. Or it can be configured to switch from the “standard planting” to the “dense planting” or “sparse planting”.

  Next, FIG. 8 shows a second embodiment.

  The second embodiment shown in FIG. 8 replaces the rotation of the planting unit 11 in the planting device 5 with the transmission of power from the engine 6 mounted on the traveling machine body 2. This is configured to be performed by a main driving electric motor 34 provided inside the main frame 9 or the sub frame 10.

  According to the second embodiment, since the power transmission mechanism such as the PTO shaft 21 from the engine 6 mounted on the traveling machine body 2 to the planting device 5 can be omitted, the planting device 5 can be significantly reduced in weight. In addition, the price can be reduced.

  In the second embodiment, the electric motor 34 for main driving is provided in the main frame 9 or the subframe 10 to reliably improve the durability and safety of the electric motor 34. it can.

DESCRIPTION OF SYMBOLS 1 Rice transplanter 2 Traveling machine body 3, 4 Wheel 5 Planting device 9 Main frame 10 Sub frame 11 Planting unit 12 Seedling stage 13 Field scene 14 Float 15 Planting shaft 16 Planting rotating body 17 Claw shaft 18 Planting claw body 19 Dividing claw 24 Stepping Motor (electric motor)
25 Movement locus

Claims (4)

A planting unit that supports the seedling mat and a planting unit that scrapes one seedling from the seedling mat on the seedling platform and plantes it on the field. Is provided,
The planting unit rotates around a planting shaft that rotates around a planting shaft that extends in the left-right direction intersecting the traveling direction of the traveling machine body in plan view, and rotates around a claw shaft that is parallel to the planting shaft. And a planting claw body attached to
The planting rotator is provided with an electric motor that rotates the planting claw in the opposite direction during one rotation of the planting rotator, and the electric motor has a rotational speed of the planting claw, A rice transplanter characterized in that it is configured to rotate at a non-uniform speed so as to decelerate in a phase around the bottom dead center in the planting rotator during one rotation.   The rice transplanter according to claim 1, wherein the electric motor is built in a hollow portion formed in the planting rotary body.   3. The rice transplanter according to claim 1, wherein the electric motor is a stepping motor.   The rice transplanter according to any one of claims 1 to 3, wherein the planting rotator is driven to rotate around a planting shaft by an electric motor for main driving.

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