JP2010252730A - Sulky rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sulky rice transplanter having good rolling balance of a planting part. <P>SOLUTION: Supporting stays 30 and 30 supporting a seedling table are set and stood at both ends of a planting frame 23 extended in the cross direction of a planting part 15, and a link shaft 57 is freely rotatably supported between the supporting stays 30 and 30. A motor-potentiobase attached with a land grading rotor elevating actuator 54 is freely fitted on the link shaft 57. A rolling spindle 31 is attached on the central part of the planting frame 23 and a link holders 32 for attaching an elevating link is freely rotatably engaged to the rolling spindle 31. A rolling control actuator 42 for controlling rolling of a planting part is attached on one of the link holders 32 and the land grading rotor elevating actuator 54 is set at the opposite side to the rolling control actuator 42 to hold the link holder 32 therebetween. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a riding rice transplanter for planting seedlings while traveling in a field.

  In general, a riding type rice transplanter has a planting part mounted on a rear side of a traveling machine body via a lifting device so as to be able to roll and move up and down. Conventionally, in such a riding type rice transplanter, there is a rolling control device that controls the rolling of the planting part and a leveling device that leveles the field between the planting part and the traveling machine body. Has been devised (see Patent Document 1).

JP 2007-267614 A

  In a riding rice planting machine equipped with such a rolling control device and a leveling device, if the actuator of the rolling control device and the lifting actuator for raising and lowering the leveling device are arranged on the same side in the width direction of the planting part, There was a problem that the rolling balance of the attached part deteriorated.

  Then, this invention aims at providing the riding type rice transplanter which solved the said subject by distribute | distributing and arrange | positioning these raising / lowering actuators and the actuators of a rolling control apparatus on either side across a link holder. .

The invention according to claim 1 is a traveling machine body (5) traveling in a farm, a planting part (15) connected to the rear of the traveling machine body (5) via a lifting device (13), and these traveling machine bodies. (5) and a leveling device (17) disposed between the planting part (15), and the lifting device (13) is connected to a rolling support shaft (31) extending in the longitudinal direction of the machine body. In the riding-type rice transplanter (1) that supports the planting part (15) in a rolling manner by attaching the link holder (32) so as to be rotatable,
A rolling control device (33) for controlling the rolling of the planting part (15);
An elevating actuator (54) for elevating the leveling device (17),
The lifting actuator (54) and the actuator (42) of the rolling control device (33) are sandwiched between the link holder (32) in the width direction of the planting part (15) perpendicular to the longitudinal direction of the machine body. Arranged to be on the opposite side,
It is in the riding type rice transplanter (1) characterized by this.

  In addition, although the code | symbol in the said parenthesis is for contrast with drawing, this is for convenience for making an understanding of invention easy, and has no influence on the structure of a claim. It is not a thing.

  According to the invention which concerns on Claim 1, the raising / lowering actuator which raises / lowers the leveling apparatus, and the actuator of the rolling control apparatus of a planting part are distributed and arrange | positioned on both sides across a link holder, The rolling of a planting part Balance improved.

The side view of the riding type rice transplanter which concerns on embodiment of this invention. The principal part enlarged side view of the planting part of the riding type rice transplanter which concerns on embodiment of this invention. The front view of the planting part of the riding type rice transplanter which concerns on embodiment of this invention. The rear view of the planting part of the riding type rice transplanter which concerns on embodiment of this invention. The perspective view of the planting part of the riding type rice transplanter which concerns on embodiment of this invention. The perspective view of the planting part of the riding type rice transplanter which concerns on embodiment of this invention. The planting part of the riding type rice transplanter which concerns on embodiment of this invention, and the principal part enlarged side view of a leveling rotor. The principal part enlarged view which shows the attachment structure around the motor potentiometer base which concerns on embodiment of this invention. The principal part enlarged view which shows the attachment structure around the motor potentiometer base which concerns on embodiment of this invention. The principal part enlarged view which shows the attachment structure around the motor potentiometer base which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the direction in description shall be considered centering on the operator who seated on the driver's seat.

[Schematic configuration of riding rice transplanter]
As shown in FIG. 1, the riding type rice transplanter 1 has a traveling machine body 5 supported by a front wheel 2 and a rear wheel 3, and an engine covered with a bonnet 6 is disposed in front of the traveling machine body 5. Has been. A driving operation unit 10 including a steering handle 7 and a driver seat 9 is provided at the center of the traveling machine body 5, and an elevator link 11 and a hydraulic cylinder 12 for raising and lowering the elevator link 11 are provided behind the operation unit 10. Are provided.

  The lifting device 13 is connected to a planting unit 15 for planting seedlings in a farm field, and below the planting unit 15 are arranged a plurality of floats 16... It is installed. Further, a leveling rotor (leveling device) 17 for leveling the field is provided between the planting unit 15 and the traveling machine body 5, and the field is leveled in front of the float 16.

[Composition of planting part]
Next, the structure of the planting part 15 is demonstrated. As shown in FIGS. 1 to 5, the planting unit 15 includes a seedling mounting table 19 on which a seedling is placed, and a planting device 20 that scrapes the seedling from the seedling mounting table 19 and plants the seedling on a farm field. The planting device 20 has a plurality of rectangular tube-shaped planting part frames 23 extending in the width direction of the planting part 15 orthogonal to the front-rear direction of the machine body with a predetermined interval. A planter case 25..., A rotary case 26 rotatably attached to the rear part of each planter case 25, a planter arm 27 rotatably attached to the rotary case 26, and a tip of the planter arm 27. And a fork 29.

  The planting part frame 23 is provided with two support stays 30 and 30 for supporting the seedling stand 19 at both ends, and a rolling support shaft 31 extending in the front-rear direction of the machine body at the center. Installed. The planting unit 15 is connected to the link holder 32 that is rotatably fitted (supported) with the rolling support shaft 31, so that the upper link 11 a and the lower link 11 b of the elevating device 13 are connected to each other, thereby the traveling machine body 5. It is supported so that it can be rolled up and down.

  2, the planter case 25 is fixed to the planting part frame 23 via an L-shaped bracket 25a and is located at the end of the planting part frame 23. 25 is arranged to face the support stay 30 in the longitudinal direction of the machine body. Further, the planting part frame 23 has two upper and lower reinforcing plate parts 23a, 23a extending in the longitudinal direction on the inner periphery thereof, and these reinforcing plate parts 23a are planted. It is a strength member of the part frame 23, and also serves as a guide part for the front and rear through bolts to which the bracket 25a and the support stay 30 are attached.

  Furthermore, the planting portion frame 23 is provided with ribs 23b, 23c, 23d for forming screw holes at the upper corners and the central portion of the lower surface on the inner periphery thereof, and bolts are fastened at required positions. A screw hole (not shown) is formed. An intermediate wall portion 23e extending vertically to connect the upper surface of the frame body and the upper reinforcing plate portion 23a to the front surface of the rib 23b provided at the upper rear corner of the planting portion frame 23. Is integrally formed with the rib 23b, and reinforces the reinforcing plate portion 23a and improves the strength and torsional rigidity of the planting portion frame 23.

  The support stay 30 attached to the front surface of the planting part frame 23 and the L-shaped bracket 25a attached to the rear surface of the planting part frame 23 are connected by front and rear through bolts guided between the reinforcing plate parts. While being fastened, it is fixed to the planting part frame 23 by being fastened to the screw holes of the ribs 23c and 23d with bolts.

  Next, the rolling control device 33 of the planting unit 15 will be described. As shown in FIGS. 3 and 5, an intermediate member 35 that is rotatably supported by the rolling support shaft 31 is interposed between the link holder 32 and the planting portion 15. An arm 36 extending in the left-right direction of the planting portion 15 is attached to the upper end portion. One ends of first and second rolling springs 37 and 39 are respectively attached to the left and right ends of the arm 36, and the other ends of the first and second rolling springs 37 and 39 are attached to the planting part frame 23. Installed.

  A tilt sensor 41 is attached to the intermediate member 35, and a rolling control actuator (actuator) 42 that is driven based on the tilt sensor 41 is attached to the link holder 32. An output gear (not shown) of the rolling control actuator 42 meshes with the intermediate gear 43, and the intermediate gear 43 meshes with an arc-shaped rack (not shown) provided on the arm 36 of the intermediate member 35. is doing.

  The rolling control device 33 determines the posture of the intermediate member 35 serving as a reference for the first and second springs 37 and 39 based on an arc-shaped rack (not shown) provided on the rolling control actuator 42, the intermediate gear 43 and the arm 36. ), The urging force of the first and second rolling springs 37 and 39 is effectively acted on without being affected by the inclination of the traveling machine body 5. It is comprised so that the planting part 15 may become horizontal with respect to a field scene.

[Configuration of planting depth setting mechanism and planting depth holding mechanism]
Next, the planting depth setting mechanism 44 that sets the planting depth of the planting unit 15 will be described. As shown in FIGS. 2 to 5, a rotating shaft 45 extending parallel to the planting part frame 23 is rotatably supported at the lower portion of the planter case 25. Are arranged side by side with a plurality of links 46... The front end of each link 46 is attached to a mounting portion 47 provided on the rear side of the float 16 by a connecting pin 49, and the float 16 swings up and down using the connecting pin 49 as a swing fulcrum. It is configured.

  Further, a planting depth setting lever 50 for rotating the pivot shaft 45 is attached to the pivot shaft 45, and the planting depth setting lever 50 has a projection 50a provided in the middle thereof. By fitting in the hole of the lever holder 51 provided in the planting part frame 23, it is comprised so that the position can be adjusted in five steps.

  The planting depth setting mechanism 44 rotates the link 46 via the rotation shaft 45 by moving the planting depth setting lever 50 to the deep planting side A or the shallow planting side B, and the float 16 The planting depth of the planting device 20 is set by adjusting the vertical (height) position relative to the planter case 25 (planting unit 15).

  Next, the planting depth holding mechanism 53 will be described. As shown in FIGS. 1 and 2, the planting depth holding mechanism 53 includes a float rocking angle detection potentiometer (detection device) 55 that detects the rocking of the float 16, and a detection signal of the float rocking angle detection potentiometer 55. And a control unit (not shown) for operating the lifting device 13 based on the above. A float rocking angle detection potentiometer 55 is connected to the floats 16... The tip of at least one detection float 16a is connected.

  The float rocking angle detection potentiometer 55 is connected to a control unit provided on the machine body side by a communication cable 60, and the float rocking angle detection potentiometer 55 electrically detected by the communication cable 60 of the detection float 16 a is detected. The swing is communicated to the control unit as a detection signal. The planting depth holding mechanism 53 moves the planting unit 15 up and down by the control unit controlling the control valve 48 of the hydraulic cylinder 12 based on the detection signal, so that the planting depth of the planting apparatus 20 (planting unit 15) is increased. Is maintained at the set depth.

[Configuration of leveling rotor]
Next, the configuration of the leveling rotor 17 will be described. As shown in FIGS. 6 and 7, the leveling rotor 17 is suspended by two stays (connecting members) 62, 62 in front of the body of the float 16, and the stay 62 extends from the middle portion thereof to the planting portion 15. A first connecting arm 63 extending toward the support stay 30 and rotatably supported by the support stay 30; and an interlocking shaft extending from the upper part toward the planting portion 15 and extending between the support stays ( A second connecting arm (connecting member) 65 integrally connected to the shaft member 57 is rotatably supported. The stay 62 and the second connecting arm 65 constitute a connecting member that connects the interlocking shaft 57 and the leveling rotor 17.

  A motor / potentiometer base (base member) 59 to which the leveling rotor lifting / lowering actuator 54 is attached is loosely fitted to the interlocking shaft 57, and a sector gear (rotating) that meshes with the output gear of the leveling rotor lifting / lowering actuator 54. Member) 67 is fixed. A ground leveling rotor height detection potentiometer 66 for detecting the rotational position of the sector gear 67 is attached to the motor / potentiometer base 59. The leveling rotor 17 is controlled by the control unit from the leveling rotor height detection potentiometer 66. On the basis of this detection signal, the leveling rotor lifting / lowering actuator 54 is driven so as to reach the height position set by the leveling rotor lifting / lowering operation dial 68 of the driving operation unit 10 so that the leveling rotor lifting / lowering actuator 54 can be raised and lowered. These leveling rotor raising / lowering actuator 54, interlocking shaft (shaft member) 57, sector gear 67, and second connecting arm 65 form an elevation mechanism for leveling device 17.

[Composition of connected parts]
Next, the structure of the connection part 74 of the planting depth setting mechanism 44, the planting depth holding mechanism 53, and the leveling rotor 17 is demonstrated. As shown in FIGS. 4, 6, and 8 to 10, the interlocking shaft 57 described above is rotatably supported at an intermediate position of the support stay 30 and has a three-part configuration. Of the two interlocking shafts 57L, 57R, 57C, the motor / potential base 59 and the sector gear 67 are loosely fitted / fixed to the central shaft 57C supported by the central support member 58.

  The motor / potentiometer base 59 is a plate-like base member extending forward of the machine body that rotates about the interlocking shaft 57, and the leveling rotor lifting / lowering actuator 54 is provided on the front side of the motor / potentiometer base 59. A leveling rotor height detection potentiometer 66 and a float swing angle detection potentiometer 55 are mounted on the rear side of the machine body on the side opposite to the side on which the leveling rotor raising / lowering actuator 54 is mounted.

  The leveling rotor height detection potentiometer 66 and the float swing angle detection potentiometer 55 are located above the planting part frame 23, and even if they are moved up and down depending on the planting depth setting, they are at a certain height L position from the field scene. Yes (see FIG. 2), it is arranged so as not to catch muddy water scattered from the field.

  On the other hand, the leveling rotor raising / lowering actuator 54 is covered with a protective cover 70 from the front side thereof, so that muddy water scattered from the leveling rotor 17 and the like is not applied. The protective cover 70 is configured such that the rear surface and the lower surface are opened, and is configured so that muddy water or the like that has entered the cover can be easily discharged. The protective cover 70 may be configured to cover the entire motor / potentiometer 71 including the leveling rotor lifting / lowering actuator 54, potentiometers 55 and 66, and the motor / potentiometer base 59 with emphasis on waterproofness.

  Further, the motor / potentiometer 71 (leveling rotor lifting / lowering actuator 54) includes the above-described rolling control actuator 42 in the left-right direction (width direction) of the planting portion 15 perpendicular to the longitudinal direction of the machine body with the link holder 32 interposed therebetween. The motor / potentiometer assembly 71 and the rolling control actuator 42 are distributed to the left and right at the center of the planting unit 15 to equalize the left / right balance of the planting unit 15. ing.

  The float rocking angle detection potentiometer 55 is connected to the tip of the detection float 16a by connecting the detection link 56 described above to an arm 76 attached to a detection shaft (not shown) and extending forward of the machine body. The detection link 56 is disposed in front of the planting part frame 23.

  At the rear side of the planting part frame 23, one end is rotatably attached to a stay 59 a extending downward from the rear part of the motor / potentiometer base 59, and the other end is directed upward from the rotary shaft 45. A connecting link 73 that is rotatably attached to the extending arm 45a is disposed, and the connecting link 73 is located in the middle of the rotating shaft 45 side (upper surface position of the planter case 25) at the rear of the machine body. It is configured to bend to the side and pass through a position close to the planting part frame 23. The motor / potentiometer base 59 is rotated about the central shaft 57 </ b> C in conjunction with the rotation of the rotation shaft 45 (planting depth setting mechanism 44) by the connecting link 73.

  The float swing angle detecting potentiometer 55 is configured so that the motor / potentiometer base 59 rotates around the rotation shaft 45 and changes its position in accordance with the planting depth set by the planting depth setting mechanism 44, so that the arm 76. The height position (attachment height) of the attachment portion between the detection link 56 and the detection link 56 is adjusted to make the relative positional relationship between the tip of the detection float 16a and the arm 76 constant, and the detection reference position depends on the planting depth. It is configured not to change.

  As described above, the detection link 56 is disposed in front of the planting part frame 23, and the connecting link 73 is disposed in the rear of the planting part frame 23, and the planting is centered on the float swing angle detection potentiometer 55. By adopting a gate-type link configuration straddling the part frame 23, the planting depth holding mechanism 53 is linked to the planting depth setting mechanism 44 with a compact configuration.

  On the other hand, since the rolling control actuator 42 meshes with the sector gear 67 fixed to the interlocking shaft 57, the motor / potential base 59 is rotated when the entire motor / potential base 59 is rotated by the connecting link 73 described above. By interlocking the output shafts of the sector gear 67 and the rolling control actuator 42, the interlocking shaft 57 is configured to rotate integrally with the motor / potential base 59. Since the above-described second connection arm 65 of the leveling rotor 17 is integrally attached to the interlocking shaft 57, the height of the leveling rotor 17 from the field scene also depends on these connection mechanisms (connection links) according to the planting depth. Mechanism) 73, 59, 67, 57, 65, 62 are mechanically interlocked and adjusted.

  The float swing angle detection potentiometer 55 is moved by the motor / potentiometer base 59 about the interlocking shaft 57. However, for example, the support stay 30 is provided with a slide mechanism and is moved up and down by the slide. Thus, the height position of the attachment portion with the detection link 56 may be changed. Further, the leveling rotor 17 may be similarly raised and lowered by sliding the interlocking shaft 57.

  Further, the detection link 56 has one end attached to an arm 76 extending in front of the machine body within the range of the longitudinal direction (longitudinal direction) of the motor / potentiometer base 59, and close to the planting part frame 23. The motor / potentiometer base 59 and the arm 76 are made shorter, and the detection link 56 is bent to be further arranged closer to the planting part frame 23. You can also.

  Further, instead of the float rocking angle detection potentiometer 55 and the leveling rotor height detection potentiometer 66 as a detection device, a sensor made up of electrical components such as a rotation angle sensor, an operating transformer, and a linear encoder may be used. Furthermore, although the rolling control actuator 42 and the leveling rotor raising / lowering actuator 54 are configured by electric motors, other driving devices such as hydraulic actuators may be used.

  In the present embodiment, the sector gear 67 is used as a rotating member that rotates the interlocking shaft 57 in accordance with the operation or position change of the leveling rotor lifting / lowering actuator 54. Other gear members may be used. Further, for example, an arm member or a link mechanism that connects the leveling rotor lifting / lowering actuator 54 and the interlocking shaft 57 may be used as the rotating member.

  Further, the leveling device is not limited to the leveling rotor 17, and any leveling device may be used as long as it leveles the field, such as a plate-type leveling device.

[Action]
Next, the operation of the riding type rice transplanter according to the embodiment of the present invention will be described. When the operator gets into the driving operation unit 10 of the traveling machine body 5, the height position of the leveling rotor 17 is adjusted by the leveling rotor raising / lowering operation dial 68 according to the planting depth. When the leveling rotor raising / lowering operation dial 68 is operated, the rolling control actuator 42 is operated, and the interlocking shaft 57 is rotated via the sector gear 67.

  When the interlocking shaft 57 rotates, the second connecting arm 65 integrally attached to the interlocking shaft 57 also rotates and moves up and down through the stay 62 until the leveling rotor 17 reaches the set height position. At this time, since the motor / potentiometer base 59 is supported by the connecting link 73, it does not rotate around the interlocking shaft 57.

  When the operator completes the setting of the leveling rotor 17, the operator plantes seedlings with the planting unit 15 while traveling on the field with the traveling machine body 5. When planting seedlings of a certain area, the operator checks whether the planting depth is appropriate. If the planting depth is shallow, the operator moves the planting depth setting lever 50 to the deep planting side a. When the planting depth is deep, the planting depth setting lever 50 is moved to the shallow planting side.

  When the planting depth setting lever 50 moves to the deep planting side A, the rotation shaft 45 and the link 46 rotate to the rear side of the machine body, and the float 16 moves to the planter case 25 side. Planting depth increases. When the planting depth setting lever 50 moves to the shallow planting side B, the pivot shaft 45 and the link 46 pivot to the front side of the machine body, and the float 16 moves in a direction away from the planter case 25 side. The planting depth of the planting part 15 becomes shallow.

  Since the rotation shaft 45 is connected to the motor / potential base 59 via the connecting link 73, when the rotation is made by the planting depth setting mechanism 44, the motor / potential base 59 rotates up and down around the interlocking shaft 57. As a result, the arm 76 of the float swing angle detection potentiometer 55 is also turned up and down by an amount corresponding to the change in the height position of the detection float 16a.

  When the motor / potentiometer base 59 is rotated, the interlocking shaft 57 is also rotated integrally by the meshing of the leveling rotor raising / lowering actuator 54 and the sector gear 67. Since the second connecting arm 65 is fixed to the interlocking shaft 57, when the interlocking shaft 57 rotates, the leveling rotor 17 is interlocked with the planting depth via the second connecting arm 65 and the stay 62. Move up and down.

  When the setting of the planting depth is completed, the operator lowers the planting unit 15 and plantes the seedling again while traveling on the field with the traveling machine body 5. When the detection float 16a of the planting part 15 detects the unevenness of the field and swings up and down with the connecting pin 49 as a swing fulcrum, the vertical displacement is detected by the float swing angle detection potentiometer 55 via the detection link 56. Is done. The control unit controls the control valve 48 of the elevating device 13 based on the detection signal of the float rocking angle detection potentiometer 55 and moves the planting unit 15 up and down to set the planting depth set by the planting depth setting mechanism 44. Hold.

  When the field is tilted and the planting unit 15 rolls, the control unit detects that the intermediate member 35 is tilted with respect to the field scene by the tilt sensor 41 and operates the motor unit 40 to change its posture. Level with respect to the field. The posture of the planting unit 15 becomes horizontal with respect to the field scene by the urging force of the first and second rolling springs 37 and 39 connecting the arm 36 of the intermediate member 35 and the planting unit frame 23.

  At this time, since the float rocking angle detection potentiometer 55 and the detection float 16a are rolled together with the planting part frame 23, the float rocking angle detection potentiometer 55 is, for example, the position between the traveling machine body 5 and the planting part 15. Even when the sensor float is twisted, the positional relationship with the detection float 16a is not twisted, and the swing of the detection float 16a is detected with the same sensing performance as in the horizontal state.

  By configuring the riding-type rice transplanter 1 as described above, the float swing angle detection potentiometer 55 and the leveling rotor height detection potentiometer 66, which are electrical components, are placed above the planting part frame 23 and at a predetermined height from the field scene. By disposing at the position L, it is possible to prevent the muddy water scattered from the leveling rotor 17 and the like from being applied to the electrical components, and to prevent the detection device from being broken due to the scattered muddy soil.

  Further, a detection link 56 that connects the arm 76 of the float swing angle detection potentiometer 55 and the tip of the detection float 16a is disposed in front of the planting part frame 23, and the motor is linked to the planting depth setting mechanism 44. The connecting link 73 for rotating the potentiometer base 59 is arranged behind the planting part frame 23, and the detection link 56 and the connecting link 73 are distributed and arranged before and after the planting part frame 23, so that a compact size is achieved. In the configuration, the position of the float rocking angle detection potentiometer 55 is changed in conjunction with the planting depth setting mechanism 44 to prevent the detection reference position of the float rocking angle detection potentiometer 55 from changing due to the change of the planting depth. it can.

  Further, the linkage link 73, the motor / potentiometer base 59, the output shaft of the leveling rotor lifting / lowering actuator 54, the sector gear 67, the interlocking shaft 57, the second connecting arm 65 and the stay 62 are interlocked with the planting depth setting mechanism 44. A linkage mechanism for changing the height position of the leveling rotor 17 is configured, and the height position of the leveling rotor 17 can be automatically adjusted according to the planting depth by a mechanical link mechanism. For this reason, compared with the case where the height position of the leveling rotor 17 is adjusted by the leveling rotor lifting / lowering actuator 54 according to the planting depth, for example, a potentiometer or the like for detecting the operating angle of the planting depth setting lever 50 is used. In addition, the cost can be reduced, and the reliability of the riding type rice transplanter used in paddy fields can be improved because there is no possibility of failure of electrical components.

  In addition, since the rotation fulcrum of the leveling rotor 17 and the motor / potentiometer base 59 is on the same axis (on the interlocking shaft 57), the leveling rotor 17 and the planting depth setting mechanism 44 are interlocked with each other in a compact configuration. be able to. Further, by attaching the float swing angle detecting potentiometer 55 to the motor / potentiometer base 59, the ground leveling rotor 17 and the float swing angle detecting potentiometer 55 can be simply configured to rotate the motor / potentiometer base 59. The height position can be adjusted at once according to the planting depth.

  The motor / potentiometer base 59 is also used as a base member for the leveling rotor lifting / lowering actuator 54, the float swing angle detection potentiometer 55, and the leveling rotor height detection potentiometer 66, thereby reducing the number of parts. These components can be arranged compactly.

  Furthermore, by using both the rotation fulcrum of the second connecting arm 65 and the rotation fulcrum of the motor / potentiometer base 59 as the interlocking shaft 57, the connection mechanism can be made simple. In addition, since the interlocking shaft 57 has a three-part configuration, the motor / potentiometer 71 can be easily incorporated into the central portion (the central shaft 57C), thereby improving the assemblability.

  Further, by supporting the central shaft 57C by the central support member 58, the rotation shaft 57 is combined with the support stays 30 and 30 to form a three-point support structure, and the first and second connecting arms 63 and 65 and the motor / potentiometer base. It is possible to prevent the rotation shaft that is the rotation fulcrum of 59 from being bent.

  Furthermore, by arranging the leveling rotor raising / lowering actuator 54 and the rolling control actuator 42 opposite to each other with the link holder 32 interposed therebetween, the rolling (left and right) balance of the planting portion 15 can be improved. Further, by attaching the protective cover 70 from the front of the leveling rotor lifting / lowering actuator 54, it is possible to prevent muddy water from being applied to the leveling rotor lifting / lowering actuator 54.

  Further, by attaching the float rocking angle detecting potentiometer 55 to the planting part frame 23 via the interlocking shaft 57 and the support stays 30 and 30, even if the planting part 15 is rolled, the float rocking angle detecting potentiometer 55 is used. Rolls integrally with the planting part frame 23 and is not twisted due to the positional relationship with the detection float 16a. Therefore, it is possible to prevent the rolling from affecting the sensing performance of the float rocking angle detection potentiometer 55.

DESCRIPTION OF SYMBOLS 1 Riding type rice transplanter 5 Traveling machine body 13 Lifting device 15 Planting part 17 Leveling device (leveling rotor)
31 Rolling support shaft 32 Link holder 33 Rolling control device 42 Actuator (actuator for rolling control)
54 Lifting actuator (actuator for leveling rotor lifting)

Claims (1)

A traveling machine body that travels in a field, a planting unit that is connected to the rear of the traveling machine body via an elevating device, and a leveling device that is disposed between the traveling machine body and the planting unit. In a riding type rice transplanter that supports the planting part in a rolling manner by rotatably attaching a link holder connected to the lifting device to a rolling support shaft extending in a direction,
A rolling control device for controlling the rolling of the planting part;
An elevating actuator for elevating and lowering the leveling device,
The lifting actuator and the actuator of the rolling control device are arranged so as to be located on the opposite side in the width direction of the planting part perpendicular to the longitudinal direction of the body with the link holder interposed therebetween.
Riding type rice transplanter characterized by that.

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