JP2013198459A - Seedling-planting apparatus of rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling-planting device of a rice transplanter which easily avoids operation failures due to the adhesion of mud and muddy water, while switching odd row planting clutches with operation pins inserted into cases, and interlocking clutch operation tools with the operation pins through interlocking mechanisms.SOLUTION: An operation portion cover 62 for covering an operation pin 61 and a spring 64 for energizing the operation pin 61 is projected from case 11 having an odd row planting clutch 50 therein to the outside of the case. An interlocking mechanism 65 for interlocking the operation pin 61 with a clutch operation tool 66 is connected to the operation pin 61 in the operation portion cover 62.

Description

  The present invention relates to a planting drive case arranged in the front-rear direction of the machine body, a seedling planting mechanism movably provided at a rear end portion of the planting drive case, and a fractional planting that switches transmission to the seedling planting mechanism between an on state and a cut state The present invention relates to a seedling planting device for a rice transplanter including a clutch.

  Conventionally, for example, as shown in Patent Document 1, there has been a seedling planting apparatus configured to provide a small number of clutches inside a planting case and operate the minority clutch with an operation pin penetrating the planting case. Moreover, as shown in Patent Document 2, there was a rice transplanter planting unit configured to provide a unit clutch inside a transmission pipe and operate the unit clutch with a clutch pin inserted through the transmission pipe.

JP 2008-82443 A JP 2002-305924 A

  The above-described seedling planting device of the rice transplanter is configured such that the fractional planting clutch is installed in a planting drive case or a case connected to the planting drive case, and the switching operation of the fractional planting clutch is performed from the outside of the case. By adopting the above-described conventional technology, an operation pin for switching the half-row planting clutch by inserting the case wall from the outside to the inside of the case is provided, and the clutch operating tool interlocked with the operation pin via the interlocking mechanism. When the control pin is provided, the side opposite to the clutch side of the operation pin is exposed outside the case, and mud and muddy water easily adhere to the operation pin and the interlocking mechanism.

  An object of the present invention is to provide a rice transplanter seedling planting device that employs an operation pin and interlocks a clutch operation tool to the operation pin via an interlocking mechanism, and that can easily avoid an operation failure due to adhesion of mud or muddy water. It is to provide.

The first aspect of the present invention is a planting drive case disposed in the front-rear direction of the machine body, a seedling planting mechanism provided to be freely driven at a rear end portion of the planting drive case, and a fraction for switching transmission to the seedling planting mechanism between an on state and a cut state A seedling planting device of a rice transplanter equipped with a line planting clutch,
The fraction planting clutch is configured to be operated to be switched between an on state and a cut state by an operation pin that is inserted into the case wall from the outside of the case in which the fraction planting clutch is installed, and operates.
An operation portion cover that covers the operation pin and a spring that urges the operation pin to operate is projected from the case to the outside of the case,
An interlocking mechanism for interlocking the operation pin with the clutch operating tool is connected to the operation pin inside the operation unit cover.

  According to the configuration of the first invention, not only the operation pin and the connection structure of the operation pin and the interlocking mechanism are covered by the operation portion cover, but also the spring is covered by the operation portion cover. The adhesion of muddy water can be avoided.

  Therefore, according to the first aspect of the present invention, the fractional planting clutch is operated by operating the operation pin via the interlocking mechanism by the clutch operating tool, but the operation failure due to mud or muddy water is less likely to occur. .

  In the second aspect of the present invention, the case in which the fractional planting clutch is installed is the planting drive case.

  According to the configuration of the second aspect of the present invention, the fractional row planting clutch is accommodated in the planting drive case, and a compact case in which a dedicated case for the fractional row planting clutch is not required can be achieved.

  Therefore, according to the second invention, it is possible to obtain a seedling planting apparatus that is compact and easy to handle.

  In the third aspect of the invention, the interlocking mechanism is constituted by an operation cable including an outer cable and an inner cable, and an end portion of the outer cable is connected to the operation portion cover.

  According to the configuration of the third invention, the operation cable can be deployed in a state where the entire portion of the inner cable that protrudes from the outer cable is located inside the operation portion cover, and mud and muddy water adhere to the inner cable. Can be avoided.

  Therefore, according to the third aspect of the present invention, although the operation cable is employed, it is difficult for muddy water and mud to enter the cable, and good operability can be maintained.

  According to the fourth aspect of the present invention, the operation unit cover is arranged such that the projecting end is positioned on the front side of the machine body from the rotation locus of the tip of the planting claw of the seedling planting mechanism.

  According to the configuration of the fourth aspect of the present invention, even if the interlocking mechanism for interlocking the operation pin and the clutch operating tool is extended linearly from the operation unit cover, the interlocking mechanism and the interlocking mechanism pass through the front side of the machine body from the rotation trajectory of the planting claw tip. The length of the interlocking mechanism from the operation unit cover to the clutch operating tool can be shortened while avoiding interference between the interlocking mechanism and the seedling planting mechanism without interference of the seedling planting mechanism.

  Therefore, according to the fourth aspect of the invention, the interlocking mechanism can be made compact with a short length from the operation unit cover to the clutch operating tool.

  According to the fifth aspect of the present invention, the operation unit cover protrudes laterally outward from the case and with a downward inclination or an upward inclination.

Of the interlocking mechanism that extends laterally outward from the operation unit cover that protrudes laterally outward from the case and horizontally, the part located on the front side of the aircraft and the rotational trajectory It is located on the front side of the machine from the distance and the turning trajectory of the tip of the planting claw of the interlocking mechanism that extends laterally outward from the operation unit cover that protrudes laterally outward and downwardly or upwardly from the case. When comparing the part and the distance between the rotation trajectories, the shape of the part on the planting claw descending side of the rotation trajectory at the tip of the planting claw is located on the rear side of the machine body as it moves away from the planting drive case, and planting As the distance from the drive case decreases, the distance between the operation unit covers protruding downward or upward from the case tends to increase. That.
Therefore, according to the configuration of the fifth aspect of the invention, the operation unit cover protrudes laterally outward from the case, and the interlocking mechanism extends laterally outward from the operation unit cover. Not only is it easy to avoid interference with the seedling mounts located above, but it is also easy to avoid interference between the interlocking mechanism and the seedling planting mechanism.

  Therefore, according to the fifth aspect of the present invention, it is easy to deploy the interlocking mechanism between the operation pin and the clutch operation tool.

  Further, according to the configuration of the fifth aspect of the invention, the length of the operation unit cover protruding from the case in the horizontal direction is shorter than the length of the operation unit cover protruding from the case in the axial direction.

  Therefore, according to the fifth aspect of the present invention, the space in the horizontal direction necessary for the deployment of the case and the operation unit cover can be accommodated while increasing the length of the operation unit cover in the axial direction so as to accommodate a long operation pin. For example, it is easy to secure a space for deploying a member or device located near the seedling guide or the like.

It is a side view which shows a seedling planting apparatus. It is a top view which shows a seedling planting apparatus. It is a side view which shows a planting drive case and a seedling planting mechanism. It is a cross-sectional top view of a feed case. It is a vertical side view of a feed case. It is a cross-sectional top view which shows a planting drive case and a seedling planting mechanism. It is a cross-sectional top view which shows a fraction row planting clutch. It is a vertical rear view which shows an operation part cover. It is a cross-sectional top view which shows the operation part cover provided with another implementation structure. It is a vertical rear view which shows the operation part cover provided with another implementation structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing a seedling planting apparatus 1 of a rice transplanter according to an embodiment of the present invention. FIG. 2 is a plan view showing the seedling planting apparatus 1 according to the embodiment of the present invention. As shown in FIGS. 1 and 2, a rice transplanter seedling planting apparatus 1 according to an embodiment of the present invention constitutes a riding type rice transplanter, and moves backward and upward from a riding type self-propelled body (not shown). A body frame 2 having a front end connected to a support member 5 positioned at the rear of the link mechanism 4 extending so as to be swingable, and eight seedlings that are provided in the rear of the body frame 2 so as to be driven in the lateral direction of the body. Mechanism 6, one seedling platform 7 provided in an inclined position located on the rear side of the machine body at the lower end above the front part of the machine frame 2, and five grounding floats arranged side by side in the machine body below the machine frame 2 8 is provided.

  The seedling planting device 1 is moved into a descending working state in which each grounding float 8 comes into contact with the farm scene and an ascending non-working state in which each grounding float 8 rises high from the farm scene by the vertical swing operation of the link mechanism 4 with respect to the traveling machine body. By being lifted and lowered and pulled by the self-propelled aircraft in the descending state, the ground scene is leveled by the grounding float 8, and eight seedlings are planted by the eight seedling planting mechanisms 6 on the leveled field scene.

  The seedling planting device 1 is supported by a support member 5 so as to be swingable around a rolling axis center in the longitudinal direction of the aircraft, so that the right and left seedling planting depths are the same or substantially the same regardless of the right and left inclination of the self-propelled aircraft. Planting seedlings while rolling against the self-propelled aircraft.

The body frame 2 will be described.
As shown in FIGS. 1, 2, and 3, the fuselage frame 2 has a mainframe 10 that is located at the front end of the fuselage frame 2 and is long in the lateral direction of the fuselage. An extending planting drive case 11 and a feed case 12 connected to an intermediate portion of the main frame 10 in the lateral direction of the machine body are provided. The main frame 10 is configured by a hollow member having a rectangular longitudinal cross-sectional shape.

  FIG. 4 is a cross-sectional plan view of the feed case 12. FIG. 5 is a vertical side view of the feed case 12. As shown in FIGS. 1, 4, and 5, the feed case 12 includes an input shaft 13, and a feed case main body 12 a that houses the speed change mechanism 14. An output case portion 12b extending is provided. On the wall surface 12c facing forward of the fuselage of the feed case body 12a, there are a connecting shaft 15 projecting forward of the fuselage, a lubricating oil supply port 16 located at the same or substantially the same height as the input shaft 13, and a lubricating oil supply port 16. A plug 17 that opens and closes is provided. The connecting shaft 15 is connected to the support member 5 so as to be rotatable around the rolling axis, and enables the seedling planting apparatus 1 to roll. A pedestal portion 12d connected to the main frame 10 is provided at the bottom of the feed case body 12a.

The seedling planting mechanism 6 will be described.
FIG. 3 is a side view showing the planting drive case 11 and the seedling planting mechanism 6. FIG. 6 is a cross-sectional plan view showing the planting drive case 11 and the seedling planting mechanism 6. As shown in FIGS. 2, 3, and 6, the eight seedling planting mechanisms 6 are arranged in the lateral direction of the machine body in an arrangement that is positioned one by one on both lateral sides of the rear end portion of each planting drive case 11. A pair of seedling planting mechanisms 6 and 6 positioned separately on both lateral sides of each planting drive case 11 are attached to a single planting drive shaft 20 penetrating in the lateral direction of the machine body at the rear end of the planting drive case 11. It is supported by the planting drive case 11 via the planting drive shaft 20 so as to be freely driven.

  Each seedling planting mechanism 6 includes a rotary rotor 6a that is rotatably supported by a portion of the planting drive shaft 20 that protrudes outside the planting drive case 11, and both ends of the rotary rotor 6a via rotary drive shafts 6b. It is provided with the planting arm 6c supported so that it can drive freely. In other words, each seedling planting mechanism 6 is driven by the gear mechanism 6e located inside the rotary rotor 6a by the rotary rotor 6a being rotationally driven by the planting drive shaft 20. The arms 6c and 6c are driven to rotate around the axis of the rotational drive shaft 6b while revolving around the axis of the planting drive shaft 20.

  Accordingly, in each seedling planting mechanism 6, when the planting drive shaft 20 is driven, the planting claw 6d provided on one planting arm 6c and the planting claw 6d provided on the other planting arm 6c are combined with each other. While drawing a turning trajectory T (see FIG. 3) as a seedling planting movement trajectory at the tip, it alternately moves up and down between the seedling take-out port 21 located on the lower end side of the seedling mount 7 and the field scene. To plant seedlings. Accordingly, each seedling planting mechanism 6 alternately takes out one seedling from the mat-like seedling of the seedling placing stand 7 at the seedling takeout port 21 by the pair of planting claws 6d, 6d, and the taken out seedling is taken out as the seedling takeout port 21. Planted down to the field. The seedlings that the seedling planting mechanism 6 takes out from the seedling platform 7 and transports it downward are guided by the seedling guide 9 (see FIG. 1) so as to go to the field scene.

The seedling supply to each seedling planting mechanism 6 will be described.
A seedling placing portion (not shown) is provided on the surface side of the seedling placing stand 7, and mat seedlings to be supplied to the eight seedling placing mechanisms 6 are placed in this seedling placing portion side by side in the horizontal direction of the machine body. It is constituted as follows. As shown in FIGS. 1, 2, and 3, the seedling platform 7 is placed on the side of the machine body by a seedling platform column 23 that supports the upper end side of the seedling platform 7 and a guide rail 24 that supports the lower end side of the seedling platform 7. It is supported movably in the direction.

  The seedling stage 7 is reciprocated in the lateral direction of the machine body in conjunction with the seedling planting movement of the seedling planting mechanism 6 by a seedling lateral feed drive device 25 (see FIG. 2) located on the back side of the seedling stage 7. This seedling removal is performed from one end side to the other end side in the lateral direction of the mat-like seedling so that the planting mechanism 6 takes out one seedling from the lower end portion of the mat-like seedling placed on the seedling placement portion. The mat-like seedlings to be supplied to each seedling planting mechanism 6 are reciprocated in the lateral direction of the machine body with respect to the seedling outlet 21 provided in the guide rail 24 so as to be sequentially performed.

  A seedling vertical feed belt 26 is provided on the back side of the lower portion of the seedling mount 7. The seedling vertical feed belt 26 is set and rotated by a seedling vertical feed drive device 27 (see FIG. 2) located on the back side of the seedling stage 7 when the seedling stage 7 reaches the left and right strotalk ends of the lateral transfer. A mat-like seedling for each seedling planting mechanism 6 driven by the stroke and placed on the seedling placement unit is vertically fed toward the seedling takeout port 21.

The work transmission device 3 that drives the seedling planting mechanism 6, the seedling lateral feed drive device 25, and the seedling vertical feed drive device 27 will be described.
As shown in FIG. 2, the work transmission device 3 inputs the driving force from the engine (not shown) of the traveling machine body to the feed case main body 12 a of the feed case 12 by the input shaft 13 provided at the front portion of the feed case 12. Then, the input driving force is configured to be transmitted to the seedling lateral feed driving device 25 and the seedling vertical feed driving device 27 by the seedling feed driving unit 30, and the driving force input to the feed case main body 12a is transmitted to the planting driving unit. 31 is transmitted to the planting drive shaft 20 of the eight seedling planting mechanisms 6.

As shown in FIGS. 2 and 4, the seedling feed drive unit 30 includes a relay transmission shaft 34 and a seedling lateral feed drive device 25 that are linked via a relay bevel gear 33 to a bevel gear 32 that is provided to be rotatable integrally with the input shaft 13. It is configured to include a lateral feed output shaft 35 that is connected to an end of the seedling platform lateral feed shaft 25a to be configured to be integrally rotatable, and a speed change mechanism 14 that is provided across the relay transmission shaft 34 and the lateral feed output shaft 35. .
Therefore, the seedling feed drive unit 30 inputs the driving force from the engine input by the input shaft 13 to the speed change mechanism 14 via the bevel gear 32, the relay bevel gear 33, and the relay transmission shaft 34, and the rotational speeds are different in four stages. The gear is shifted to the driving force, and the driving force after the shifting is output from the lateral feed output shaft 35 to the seedling table lateral feed shaft 25a. Therefore, the seedling feed driving unit 30 shifts the driving speed of the seedling platform horizontal feed shaft 25a to four different driving speeds by the speed change mechanism 14, and the seedling platform horizontal feeding speed as the seedling horizontal feeding speed is set to four stages. change.

  The seedling feed drive unit 30 includes a longitudinal feed output shaft 37 connected to an end of a seedling vertical feed shaft 27 a constituting the seedling vertical feed drive device 27 so as to be integrally rotatable by a connecting pin 36, and one end portion of the vertical feed output shaft 37. And a transmission gear 39 provided so as to be integrally rotatable on the lateral feed output shaft 35 in mesh with the transmission gear 38, and driving the lateral feed output shaft 35. The force is transmitted to the vertical feed output shaft 37 through the transmission gear 39 and the transmission gear 38, and is output from the vertical feed output shaft 37 to the seedling vertical feed shaft 27a.

  As shown in FIGS. 2 and 4, the planting drive unit 31 includes the input shaft 13 and the relay transmission shaft 34, and the output wheel of the feed case 12 that is interlocked with the relay transmission shaft 34 by a gear interlocking mechanism 40. The output case portion 12b of the feed case 12 is connected to the center portion of the body 41 and the output wheel body 41 so that the left side of the output case portion 12b of the feed case 12 enters the front end portions of the left two planting drive cases 11 and 11. The right-hand side of the two right-side planting drive cases 11, 11 are arranged so that they enter the front end portions of the two planting drive cases 11, 11, and the transmission shaft 42 is installed in each planting drive case 11 so as to be interlocked with the planting drive shaft 20. The rotary transmission shaft 43 is provided.

  As shown in FIGS. 4 and 5, the output ring body 41 is constituted by a rotating gear, and the gear interlocking mechanism 40 is provided on the relay transmission shaft 34 so as to be integrally rotatable, and the upper side relay transmission gear 40 a and the upper side relay transmission. The lower relay transmission gear 40b meshed with the gear 40a and the output wheel body 41 is constituted. The upper side relay transmission gear 40a and the lower side relay transmission gear 40b are rotatably supported by the output case portion 12b of the feed case 12.

  As shown in FIG. 4, the output wheel body 41 includes a wheel body main body 41 a interlocked with the lower-side relay transmission gear 40 b, and extends from the wheel body main body 41 a so as to be integrally rotatable on both lateral sides, and is externally fitted to the transmission shaft 42. The boss portion 41b is configured to be provided, and the output is provided via a bearing 45 interposed between the output wheel body support portion 12e provided at the extending end portion of the output case portion 12b in the feed case 12 and each boss portion 41b. The ring body support portion 12e is rotatably supported. A sealing member 46 is interposed between each boss portion 41 b and the output wheel body support portion 12 e, and the sealing member 46 located at each boss portion 41 b is on the side where the ring body main body 41 a is located with respect to the bearing 45. Are arranged in the direction opposite to the axis of the transmission shaft 42 in the axial direction. The extension length L of each boss 41b extending from the ring body 41a is set to an extension length at which the extension end projects from the seal member 46 to the side opposite to the side where the bearing 45 is located.

  As shown in FIGS. 2, 4, and 6, the transmission shaft 42 includes a transmission case 47 provided between the output case portion 12b of the feed case 12 and the planting drive case 11 adjacent to the output case portion 12b, and two adjacent transmission cases. It is accommodated in a transmission case 47 provided over the planting drive cases 11 and 11. The transmission shaft 42 is configured to be divided into eight divided transmission shafts 42a in the axial direction. The divided transmission shaft 42 a constituting the transmission shaft 42 is connected inside the output case portion 12 b of the feed case 12 and near the outside of the planting drive case 11. A pair of adjacent split transmission shafts 42a and 42a includes a connecting cylinder 48 and an output ring body 41 that are fitted over the pair of split transmission shafts 42a and 42a, and a boss portion 41b of the connection cylinder 48 and the output ring body 41, and each of them. A connecting key 49 provided between the divided transmission shaft 42a and the divided transmission shaft 42a is connected so as to be integrally rotatable.

  As shown in FIG. 2, a fractional planting clutch 50 is provided at the front end portion of the rotation transmission shaft 43 provided in each planting drive case 11, and a torque limiter is provided at the rear end portion of the rotation transmission shaft 43 provided in each planting drive case 11. 70 is provided.

  As shown in FIG. 6, the fractional planting clutch 50 provided on the rotation transmission shaft 43 of each planting drive case 11 includes a drive-side clutch body 51 and a driven-side clutch body 52 that are externally fitted to the front end portion of the rotation transmission shaft 43. A spring 54 that is externally fitted to the rotation transmission shaft 43 is provided between the driven clutch body 52 and a spring receiving portion 53 provided on the rotation transmission shaft 43.

  The drive-side clutch body 51 is externally fitted to the rotation transmission shaft 43 in a state where the bevel gear portion 51 a meshes with a bevel gear 55 provided on the transmission shaft 42 so as to be integrally rotatable, and the bevel gear 55 is fitted from the transmission shaft 42. Is driven to rotate around the axis of the rotary transmission shaft 43 by the driving force transmitted through the shaft. The drive side clutch body 51 is rotatably supported by the support portion 11 a of the planting drive case 11 via a bearing 56.

  The driven side clutch body 52 is engaged with the rotation transmission shaft 43 so as to be integrally rotatable by engagement between a spline portion 52 a provided on the inner peripheral surface and a spline portion 43 a provided on the peripheral surface of the rotation transmission shaft 43. In this way, the rotary transmission shaft 43 is configured to slide in the axial direction while maintaining this engagement. The driven-side clutch body 52 is slid to the side where the drive-side clutch body 51 is located by an engaging operation by the urging force of the spring 54 and a cutting operation by the operation pin 61 against the operation by the spring 54. And a switching position in which the drive side clutch body 51 is slid in the opposite direction to the side where the drive side clutch body 51 is located.

  When the driven clutch body 52 is switched to the entering position, the driven side clutch pawl 52 b provided at the end of the driven side clutch body 52 and the drive side clutch pawl provided at the end of the drive side clutch body 51 are operated. 51b meshes with the drive side clutch body 51 so as to be integrally rotatable. When the driven-side clutch body 52 is switched to the disengagement position, the driven-side clutch pawl 52b and the driving-side clutch pawl 51b are disengaged, and the connection to the driving-side clutch body 51 is released.

  In other words, the fractionally planted clutch 50 is switched to the engaged state when the driven clutch body 52 is switched to the engaged position, and the drive force of the bevel gear 55 as the drive force of the transmission shaft 42 is changed to the drive clutch body 51. Then, the rotation transmission shaft 43 is driven by being transmitted to the front end portion of the rotation transmission shaft 43 through the driven clutch body 52. The driving force of the rotation transmission shaft 43 is engaged with the bevel gear 73 provided from the rear end portion of the rotation transmission shaft 43 so as to be integrally rotatable with the driven clutch body 72 constituting the torque limiter 70. Is transmitted to the planting drive shaft 20 through the planting drive gear 75 provided so as to be rotatable integrally with the planting drive shaft 20.

  When the driven clutch body 52 is switched to the disengagement position, the fractional planting clutch 50 is switched to the disengaged state, and the driving force of the bevel gear 55 as the driving force of the transmission shaft 42 is transmitted to the rotation transmission shaft 43. And the rotation transmission shaft 43 is stopped. When the rotation transmission shaft 43 stops, the planting drive shaft 20 stops.

  Accordingly, each of the fractional planting clutches 50 is switched to the engaged state, whereby a pair of seedling planting mechanisms 6 supported by the planting drive case 11 including the rotation transmission shaft 43 with the fractional planting clutch 50 attached. , 6 are driven so as to perform seedling planting operation, and are switched to the cutting state, whereby only the pair of seedling planting mechanisms 6, 6 supported by the planting drive case 11 are stopped so as to stop planting.

  As shown in FIG. 6, each fraction planting clutch 50 is provided for each fraction planting clutch 50, and is configured to be switched by a clutch operating device 60 including the operation pin 61.

  The clutch operating device 60 for each fractional planting clutch 50 includes an operation portion cover 62 projecting laterally outward from the planting drive case 11, an operation pin 61 provided inside the operation portion cover 62, and an end portion of the operation pin 61 and an operation thereof. A spring 64 provided between the opening cover 63 of the part cover 62 and provided inside the operation part cover 62, and a clutch lever 66 as a clutch operating tool linked to the operation pin 61 via the operation cable 65 are provided. Configured. As shown in FIG. 1, the clutch lever 66 is swingably disposed on an operation panel 67 provided on the back surface side of the upper end portion of the seedling mount 7.

  As shown in FIGS. 6 and 8, the operation portion cover 62 extends from the planting drive case 11 in the horizontal direction or substantially in the horizontal direction. The operation portion cover 62 is integrally formed with the casting planting drive case 11. As illustrated in FIG. 3, the operation unit cover 62 has a protruding end of the operation cable 65 so that it is easy to avoid interference between the operation cable 65 extending from the operation unit cover 62 and the seedling planting mechanism 6. The projecting portion 62a is arranged so as to be positioned on the front side of the machine body from the rotation trajectory T of the planting claw tip. The operation pin 61 is slidably supported by the base portion 62c of the operation portion cover 62 with the head side passing through the wall of the planting drive case 11. The opening lid portion 63 is prevented from coming off by being latched by a stopper 81 fastened by a connecting bolt 80 to a support portion 62 b formed integrally with the extending end portion of the operation portion cover 62. The operation cable 65 includes an inner cable 65a whose clutch side end is connected to the operation pin 61 via the joint 82 inside the operation unit cover 62, and an outer cable 65b in which the inner cable 65a is slidably fitted. It is configured with. A clutch side end portion of the outer cable 65 b is supported by a holder portion 63 a provided in the opening lid portion 63.

  Accordingly, by swinging the clutch lever 66 to the on position [on], the inner cable 65a is pulled to pull the operation pin 61 against the spring 64, and the head 61a of the operation pin 61 is planted. It moves to the drive case outward side, releases the support action for the cam plate portion 52c in the driven side clutch body 52, and the driven side clutch body 52 is switched to the input position by the spring 54, and the fractional planting clutch 50 is engaged. become.

  By swinging the clutch lever 66 to the cut position [cut], the inner cable 65a is loosened, and the operation pin 61 is moved to the inward side of the planting drive case by the urging force of the spring 64. The head 61a matches the notch of the cam plate portion 52c, and the operation pin 61 pushes the cam plate portion 52c against the spring 54 to switch the driven clutch body 52 to the cut position, thereby planting the fractions. The clutch 50 is disengaged. At this time, when the driven clutch body 52 is positioned so that the pair of planting claws 6d, 6d of the seedling planting mechanism 6 is located above the field scene, the head 61a of the operation pin 61 is moved from the cam plate 52c. It is configured to press the cam plate portion 52c to the cut side in conformity with the cut recess, and the fractional planting clutch 50 is positioned at the rotational phase where the pair of planting claws 6d, 6d are located above the field scene. A fixed position stop function for stopping the seedling planting mechanism 6 is provided.

[Another embodiment]
FIG. 9 is a cross-sectional plan view showing an operation unit cover 62 having another embodiment structure. FIG. 10 is a longitudinal rear view showing an operation unit cover 62 having another embodiment structure. As shown in these drawings, the operation unit cover 62 having another implementation structure protrudes from the planting drive case 11 laterally outward and with an upward inclination. The opening lid portion 63 of the operation portion cover 62 is configured to be fixed to the support portions 62 b provided on both sides of the opening of the operation portion cover 62 by the connecting bolt 80.

[Another Example]
(1) In the above-described embodiment, the example in which the fractional row planting clutch 50 is configured to be accommodated in the planting drive case 11 has been shown. However, it is formed separately from the planting drive case 11 and attached to the planting drive case 11. You may implement by comprising so that it may be accommodated in a case.

(2) In the above-described embodiment, the example in which the operation unit cover 62 protrudes horizontally and outwardly from the case housing the fraction-planting clutch 50 is shown. You may carry out by projecting.

(3) In the above-described embodiment, an example in which the operation unit cover 62 that protrudes laterally outward from the case that houses the fractional planting clutch 50 is shown is provided. The case is protruded upward or downward from the case. An operation unit cover may be employed.

(4) In the above-described embodiment, the example in which the operation cable 65 is employed as the interlocking mechanism connected to the operation pin 61 has been described. However, a rod, a link, or the like may be employed.

(5) In the above-described embodiment, the example in which the fractional planting clutch 50 is provided at the front end portion of the rotation transmission shaft 43 is shown, but the rear end portion of the rotation transmission shaft 43 is provided instead of the torque limiter 70. May be.

(6) In the above-described embodiment, the example in which the seedling planting mechanism 6 is provided on both sides of the planting drive case 11 has been described. However, even if the seedling planting mechanism 6 is provided only on one side of the planting drive case 11, Good.

(7) In the above-described embodiment, an example in which the seedling planting mechanism 6 including the rotating rotor 6a is provided has been described. However, a seedling planting mechanism including a swingable driving arm and a single planting claw is provided and implemented. Also good.

(8) In the above-described embodiment, an example in which eight seedling planting mechanisms 6 are provided has been described. However, a number of seedling planting mechanisms other than eight, such as six or four, may be provided.

  The present invention can be used for a rice transplanter configured as a walking type as well as a rice transplanter configured as a riding type.

6 seedling planting mechanism 11 planting drive case 50 fraction strip planting clutch 61 operation pin 62 operation section cover 62a projecting end 64 spring 65 interlocking mechanism 65a inner cable 65b outer cable 66 clutch operating tool T rotation locus

Claims (5)

Rice planting provided with a planting drive case deployed in the front-rear direction of the machine body, a seedling planting mechanism movably provided at the rear end of the planting drive case, and a fractional planting clutch for switching the transmission to the seedling planting mechanism between an on state and a cut state Machine seedling planting device,
The fraction planting clutch is configured to be operated to be switched between an on state and a cut state by an operation pin that is inserted into the case wall from the outside of the case in which the fraction planting clutch is installed, and operates.
An operation portion cover that covers the operation pin and a spring that urges the operation pin to operate is projected from the case to the outside of the case,
A seedling planting apparatus for a rice transplanter, wherein an interlocking mechanism for interlocking the operation pin with a clutch operating tool is connected to the operation pin inside the operation unit cover.   The seedling planting device of the rice transplanter according to claim 1, wherein the case in which the fractional row planting clutch is installed is the planting drive case. The interlocking mechanism is constituted by an operation cable having an outer cable and an inner cable,
The seedling planting apparatus of the rice transplanter of Claim 1 or 2 which has connected the edge part of the said outer cable to the said operation part cover.   The seedling of the rice transplanter as described in any one of Claims 1-3 which has arrange | positioned the said operation part cover so that a projecting end may be located in a machine body front side from the rotation locus | trajectory of the planting claw tip of the said seedling planting mechanism. Planting equipment.   The seedling planting apparatus of the rice transplanter as described in any one of Claims 1-4 which the said operation part cover protrudes from the said case laterally outward, and with the downward inclination or the upward inclination.

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