JP6205979B2 - Ambulatory seedling transplanter - Google Patents

Description

  The present invention relates to a walking type seedling transplanter that performs operations such as planting seedlings in a field.

  As a walking type seedling transplanter, a seedling transplanter that runs in the field with a pair of left and right wheels, and plantes seedlings in the field with a seedling planting device while leveling the unevenness of the field with floats provided at the lower part of the aircraft and on both sides Is used (see, for example, Patent Document 1 and Patent Document 2).

JP 2009-118831 A JP 2007-089515 A

  However, the walking-type seedling transplanting machine disclosed in Patent Document 1 takes a seedling from a seedling placing member and implants the seedling on a farm with a crank-type seedling planting device. In the crank-type seedling planting device, the movement trajectory of the tip of the planting basket when planting seedlings is a movement trajectory for planting seedlings on the front side of the machine body from the front plate provided at the lower part of the seedling mounting member. For this reason, the walking-type seedling transplanter shown in Patent Document 1 is in contact with the front plate that advances to the upper end of the planted seedling, the seedling is pushed down, the seedling is damaged, May cause poor growth.

  Moreover, the walking type seedling transplanter shown in Patent Document 1 includes a planting transmission shaft of a seedling planting device, a planting drive shaft for rotating a planting basket of the seedling planting device, and a seedling platform in a horizontal direction. The direction of alignment with the sliding shaft that is reciprocally slid is inclined with respect to the vertical direction. For this reason, the walking-type seedling transplanter shown in Patent Document 1 has a problem in that the front and rear width of the transmission case becomes long and the size of the machine body increases.

  Moreover, the walking type seedling transplanter shown in Patent Document 1 has a configuration in which a notch portion in the front-rear direction is formed in a part of the float to level the planting position of the seedling planting apparatus. However, the walking-type seedling transplanter shown in Patent Document 1 has a notch formed longer on the front side of the body than the seedling planting position in order to enable the crank mechanism to operate. The seedling planting depth may be too shallow or too deep, and the seedling may be poorly grown.

  The seedling transplanting machine shown in Patent Document 2 is a riding-type seedling transplanting machine in which a rotary seedling planting device is provided below the seedling placing member and rotates in the same direction as the rotating direction of the traveling wheels. The rotary seedling planting apparatus is configured to change the angle of the planting ridges by meshing of the gears in the rotary case.

  However, as shown in Patent Document 1, the walking-type seedling transplanting machine is different from a riding-type seedling transplanting machine equipped with a rotary seedling transplanting apparatus, and the orientation of the seedling placing member is reversed in the front-rear direction. The rotation direction of the kite is opposite to the traveling wheel. For this reason, if a rotary seedling planting device that is the same as a riding seedling transplanter is installed in a walking type seedling transplanter, mud is splashed when planting seedlings, and the planted seedlings become mud. Photosynthesis may be hindered by being pushed down or adhering to mud, resulting in poor growth. In addition, mud tends to adhere to the seedling placing member, and there is a problem in that the labor required for the worker to clean up increases.

  Therefore, an object of the present invention is to provide a walking type seedling transplanter that can improve the disadvantages of the conventional example and suppress the growth failure of seedlings.

In order to achieve the above object, the invention according to claim 1 is a vehicle body (2) including left and right traveling wheels (10) traveling in a field, and a seedling provided on a rear portion of the vehicle body (2) and carrying a seedling. In a walking type seedling transplanter (1), comprising: a placing member (30); and a seedling planting device (3) for taking seedlings from the seedling placing member (30) and planting the seedlings in a farm field. (3) is a rotating case (61) that is rotated by a driving force from an engine (11) provided in the airframe (2), and is provided rotatably with respect to the rotating case (61) A planting basket (34) for taking seedlings from the member (30) and planting them in the field , and an input rotating body (62) housed in the rotating case (61) and rotated by a driving force from the engine (11) And housed in the rotating case (61) and front A driven rotating body (75) meshing with the input rotating body (62), a driven rotating shaft (76) rotating together with the driven rotating body (75), and the driven rotating shaft (76) attached to the driven rotating shaft (76). (76) and a balance weight (77) that is formed to gradually increase in width as the distance from (76) increases, and the rotational direction of the rotating case (61) is opposite to the rotational direction of the traveling wheel (10), The movement trajectory (K) of the tip of the planting ridge (34) is such that the position (Kb) at which the seedling starts to retract after planting the seedling (34) is behind the lower body of the seedling placement member (30). It is a walking type seedling transplanter (1) characterized by being a movement trajectory on the side.

The invention according to claim 2, wherein the seedling planting apparatus (3) is housed before Symbol rotary case (61) in, and the output rotor that rotates in conjunction with implantable rod (34) (63) and a relay rotator (64) housed in the rotating case (61) and transmitting a driving force from the input rotator (62) to the output rotator (63), When the tip of the implantation cage (34) is positioned at the lowest position (Kb) of the movement locus (K), the input rotating body (62), the relay rotating body (64), and the output rotating body ( 63. The walking seedling transplanter (1) according to claim 1, wherein the straight line (L) connecting the centers of 63) is in a posture of approaching the farm field toward the rear side of the aircraft (2). .

Further, according to the invention described in claim 3, the entering force rotator (62) and connecting the center of the relay the output rotor rotating body (64) (63) and the driven rotating body (75) straight (L2 ) And the center line (P) of the balance weight (77), the rotation of the rotary case (61) with the mass of the balance weight (77) as the angle (θ) becomes smaller than 90 degrees. The walking-type seedling transplanter (1) according to claim 2, characterized in that the force for assisting is increased.

According to a fourth aspect of the present invention, the planting ridge (34) includes a scraping member (67) for scraping the seedling from the seedling placing member (30), and a scraping member (67). The extrusion member (68) provided to be movable between an extrusion position and a non-extrusion position for extruding the taken seedling to the field, and the extrusion member (68) is moved between the extrusion position and the non-extrusion position. The operation arm (69) to be rotated and the output rotating body (63) to rotate, and until the seedling planting position (Kc) for planting the seedling in the field, the operating arm (69) has the pushing member ( 68) is held at the non-extrusion position, and when positioned at the seedling planting position (Kc), the operation arm (69) includes an extrusion cam that brings the extrusion member (68) to the extrusion position,
The seedling planting position (Kc) is higher than the lowest position (Kb) of the movement locus (K) of the tip of the planting ridge (34) and lower than the lower end of the seedling placing member (30). The walking seedling transplanting machine (1) according to claim 2 or 3, wherein the body (2) is located on the rear side.

  The invention according to claim 5 further includes a reciprocating sliding mechanism (45) for reciprocatingly sliding the seedling placing member (30) in the left-right direction of the machine body (2), wherein the reciprocating sliding mechanism (45) The lead cam shaft (48) that rotates by the driving force from the engine (11), and the sliding that slides the seedling placing member (30) in the left-right direction of the machine body (2) by the rotation of the lead cam shaft (48). A planting transmission shaft (46) provided with a shaft (49), which is rotated by a driving force from the engine (11) and transmits the driving force to the lead cam shaft (48) and the seedling planting device (3). A planting drive shaft (46b) that rotates an input rotating body (62) of the seedling planting device (3) by a driving force from the planting transmission shaft (46), and the planting transmission shaft ( 46), the planting drive shaft (46b), and the sliding shaft (49). A downward that is arranged on a straight line from claim 1, wherein according to any one of claims 4 walk-seedlings transplanter (1).

  In the invention according to claim 6, the planting transmission shaft (46) for transmitting the driving force to the seedling planting device (3) is arranged on the rear side of the machine body (2) from the outer edge of the traveling wheel (10). The walking seedling transplanter (1) according to any one of claims 1 to 5, characterized in that the walking seedling transplanter (1) is arranged.

  The invention according to claim 7 further includes a float (51, 52) provided at a lower portion of the airframe (2) and moving vertically according to the surface of the field in contact with the surface of the field. The planting drive shaft (46b) of the seedling planting device (3) is arranged on the front side of the machine body (2) with respect to the rotating shaft (53) of the 51, 52), and the float (51, 52) Planting that allows the planting basket (34) to plant seedlings on the front side of the body (2) of the planting basket (34) of the seedling planting device (3) and in the vicinity of the planting basket (34) The walking seedling transplanter (1) according to any one of claims 1 to 6, further comprising a notch (54).

  Further, according to an eighth aspect of the present invention, the planting gutter (34) includes an oil inlet (73) for injecting lubricating oil therein, the oil inlet (73) at the upper end and the machine body (2). The walking seedling transplanting machine (1) according to any one of claims 1 to 7, wherein the walking seedling transplanting machine (1) is arranged on a rear side.

  According to invention of Claim 1, since the rotation direction of a rotation case (61) is made into the reverse direction with the rotation direction of a driving wheel (10), the muddy soil which a planting basket (34) jumps up when planting a seedling Will be blown to the front side of the fuselage (2). For this reason, it can suppress that mud covers a seedling and crushes and prevents photosynthesis, and can suppress the growth failure of a seedling.

In addition, the lowermost position (Kb) where the tip of the planting basket (34) begins to retreat upward from the lower end position (Kb) of the planting basket (34) is lower than the lower end of the seedling placing member (30). 2) The movement trajectory (K) on the rear side. For this reason, it can suppress that the seedling planted by the planting basket (34) comes into contact with the lower end of the seedling placing member (30), can suppress the seedling from being pushed down, or the seedling can be damaged, Growth failure can be suppressed.
Further, since the balance weight (77) is attached to the driven rotation shaft (76), the mass of the balance weight (77) can be applied as a force for assisting the rotation of the rotation case (61) when necessary.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, when the tip of the implant cage (34) is positioned at the lowest position (Kb), the input rotating body ( 62), a straight line (L) connecting the centers of the relay rotator (64) and the output rotator (63) is a posture approaching to the farm field toward the rear side. For this reason, when pulling up the planting basket (34) from the lowest position (Kb), the mass of the rotating case (61) acts as a force that strengthens the rotation of the rotating case (61). Therefore, since the rotational load applied at the time of raising the planting basket (34) can be suppressed by the mass of the rotating case (61), it is possible to suppress the rotation of the rotating case (61) from being disturbed, and the planting accuracy of the seedling is improved. improves.

According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, the input rotating body (62), the relay rotating body (64), the output rotating body (63), and the driven rotating body (75). ) Of the weight of the balance weight (77) as the angle (θ) formed by the straight line (L2) connecting the centers of the balance weight (77) and the center line (P) of the balance weight (77) becomes smaller than 90 degrees. The power to assist the rotation of (61) is strengthened. For this reason, it can suppress that rotation of a rotation case (61) is disturb | confused by backlash, and can improve the planting precision of a seedling.

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 2 or claim 3, the seedling planting position (Kc) is determined by the movement trajectory (K of the tip of the planting basket (34)). ) Above the lowermost position (Kb) and on the rear side of the body (2) with respect to the lower end of the seedling placing member (30), when the seedling is planted, the lower end of the rotating case (61) is the seedling. It has already passed above. Therefore, it is possible to suppress the seedling from being pushed down or damaged, to suppress the growth failure of the seedling, and to improve the seedling planting accuracy.

  According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, the planting drive shaft (46b), the planting transmission shaft (46), and the slide Since the moving shaft (49) is arranged on a straight line in the vertical direction, the front-rear width of the mechanism for transmitting the driving force to the seedling planting device (3) can be suppressed, and the size of the machine body can be reduced.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, the planting transmission shaft (46) is disposed more than the outer edge of the traveling wheel (10). Since it arrange | positions to the body (2) back side, an operator can maintain a planting transmission shaft (46) etc., without removing a traveling wheel (10).

  According to the invention described in claim 7, in addition to the effect of the invention described in any one of claims 1 to 6, the planting notch (54) is disposed in front of the planting basket (34). And since it has arrange | positioned in the vicinity, the location which plants the seedling of the seedling planting apparatus (3) in the surface of a field can be leveled reliably. Therefore, the planting accuracy of the seedling can be improved.

  According to the invention described in claim 8, in addition to the effect of the invention described in any one of claims 1 to 7, the oil inlet (73) of the planting basket (34) 34) Since it is arranged at the upper end portion of the machine body (2) and on the rear side thereof, the efficiency of the lubricating oil injection work of the implantation paddle (34) is improved, and the maintainability can be improved.

It is a side view showing the walk type seedling transplanter concerning an embodiment. It is a top view showing the walking type seedling transplanting machine which concerns on embodiment. It is sectional drawing which follows the III-III line in FIG. It is a longitudinal cross-sectional view of the implantation cage of the walking type seedling transplanter which concerns on embodiment. It is a figure which shows the movement locus | trajectory etc. of the transplanting ridge of the walking type seedling transplanter which concerns on embodiment. It is a figure which shows the structure of the planting transmission mechanism of the seedling transplanting machine which concerns on embodiment. It is a top view of the center float of the seedling transplanter concerning an embodiment. It is a figure which shows the movement locus | trajectory of the transplanting rod of the walking type seedling transplanter which concerns on embodiment. It is a figure which shows the movement locus | trajectory etc. during the driving | running | working of the transplanting rod of the walking type seedling transplanter concerning embodiment. It is sectional drawing, such as a planting mechanism of the walk type seedling transplanter which concerns on the modification of embodiment. It is a figure explaining operation | movement of the planting mechanism of the walking type seedling transplanter which concerns on the modification of embodiment.

  Below, the walking type seedling transplanter which concerns on embodiment and the modification of this invention is demonstrated in detail based on drawing. In addition, this invention is not limited by these embodiment and modifications. In addition, constituent elements in the following embodiments and modifications include those that can be easily replaced by those skilled in the art or those that are substantially the same. Furthermore, the present invention is not limited to the above-described embodiments and modifications, and various modifications can be made without departing from the scope of the present invention.

[Embodiment]
A walking type seedling transplanter 1 according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view illustrating a walking seedling transplanter according to an embodiment. FIG. 2 is a top view illustrating a walking seedling transplanter according to the embodiment. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a vertical cross-sectional view of a transplanting cage of the walking type seedling transplanter according to the embodiment. FIG. 5 is a diagram illustrating a movement trajectory of the transplanting ridge of the walking type seedling transplanter according to the embodiment. FIG. 6 is a diagram illustrating a configuration of a planting transmission mechanism of the seedling transplanter according to the embodiment. FIG. 7 is a top view of the center float of the seedling transplanter according to the embodiment. FIG. 8 is a diagram illustrating a movement trajectory of the transplanting ridge of the walking seedling transplanter according to the embodiment. FIG. 9 is a diagram illustrating a movement trajectory or the like during travel of the transplanting cage of the walking seedling transplanter according to the embodiment.

  The walking-type seedling transplanter 1 (hereinafter simply referred to as a seedling transplanter) according to the embodiment is configured to plant seedlings in a farm field while traveling with a walking worker. In the following, the forward direction of the seedling transplanter 1 is the front side (left side of FIGS. 1 and 2), the reverse direction of the forward direction is the rear side (right side of FIGS. 1 and 2), and the walking type The orthogonal direction orthogonal to the front-rear direction of the seedling transplanter 1 is the left-right direction, and the vertical direction orthogonal to the front-rear direction of the seedling transplanter 1 is the vertical direction.

  As shown in FIG. 1 and FIG. 2, the seedling transplanting machine 1 includes a body 2, a seedling stage 30 (corresponding to a seedling mounting member) provided on the rear part of the body 2 and mounting seedlings, and seedlings from the seedling stage 30. A seedling planting device 3 for planting the plant in the field, a driving force transmission mechanism 4, a float 5, and a control device (not shown) are provided.

  The machine body 2 includes traveling wheels 10 as a pair of left and right driving wheels that travel in the field. The airframe 2 is attached to the engine 11 provided in the airframe 2, a front frame 12, a rear frame 13 that is fixed to the rear end of the front frame 12, is curved and extends obliquely upward, and a rear end of the rear frame 13. And a steering handle 14 is provided. In this walking type seedling transplanting machine 1, the driving force of the engine 11 is used not only to drive the traveling wheel 10 to advance the machine body 2 but also to drive the seedling planting device 3.

  The traveling wheel 10 is moved up and down with respect to the front frame 12, that is, the machine body 2 by a hydraulic lifting cylinder 15 provided on the front frame 12, and the vertical position with respect to the machine body 2 is changed. A pair of hydraulic elevating cylinders 15 is provided corresponding to each traveling wheel 10, and the pair of hydraulic elevating cylinders 15 are arranged at intervals in the left-right direction. The cylinder rods (not shown) of the pair of hydraulic lifting cylinders 15 are connected by a relay link member 16 (shown in FIG. 2), and the cylinder bodies (not shown) of the pair of hydraulic lifting cylinders 15 are spring members 17 (not shown). (Shown in FIG. 2). When the relay link member 16 and the spring member 17 are tilted in the left-right direction such as the left-right tilt of the machine body 2, the left-right direction of the machine body 2 is corrected so that the left-right direction of the machine body 2 becomes horizontal.

  The engine 11 is a heat engine such as a diesel engine or a gasoline engine, and outputs driving force from an output shaft. The output shaft protrudes from the left side of the body 2. The engine 11 is disposed at the front center of the front frame 12 at the approximate center in the left-right direction of the body 2. A bonnet cover 18 is provided above the engine 11. The bonnet cover 18 accommodates a fuel tank 19 and a control device provided above the engine 11.

  The steering handle 14 is for changing the traveling direction of the body 2, that is, the walking type seedling transplanter 1. On the front side of the steering handle 14 and on the rear side of the seedling mounting base 30 of the seedling planting device 3, a main clutch lever 20 that can cut off transmission to the traveling wheel 10, the seedling planting device 3, and the traveling wheel 10, A planting lifting / lowering lever 21 is provided for switching off the oil path so as to cut off transmission to the seedling planting device 3 or to operate the hydraulic lifting / lowering cylinder 15. The main clutch lever 20 is configured to be operated in two operation positions, an on position and a disengagement position, and the main clutch in the main transmission case 40 of the driving force transmission mechanism 4 is operated to be in a transmission state and a non-transmission state. Switch to.

  The planting lifting / lowering lever 21 is configured to be operated in four operation positions including a planting position, a descending position, a neutral position, and an ascending position, and operates a planting clutch of the driving force transmission mechanism 4 to operate a seedling planting apparatus. 3 is switched between a driving state and a non-driving state, and the hydraulic lifting cylinder 15 is operated to move the left and right traveling wheels 10 up and down.

  That is, when the planting lift lever 21 is operated to the planting position, the seedling planting device 3 is operated with the planting clutch in a transmission state, and the left and right traveling wheels 10 receive a ground load due to the weight of the body 2. The left and right traveling wheels 10 are moved upward by the hydraulic lift cylinder 15 to lower the machine body 2 to bring the float 5 into a grounded state. When operated to the lowered position, the planting clutch is set in a non-transmission state with the machine body 2 lowered as described above, and the operation of the seedling planting device 3 is stopped. When operated to the neutral position, the operation of the hydraulic lifting cylinder 15 is fixed by blocking the oil passage to the hydraulic lifting cylinder 15 in a state where the operation of the seedling planting device 3 is stopped as described above. The wheel 10 is fixed at an arbitrary vertical position, and the elevation of the machine body 2 is stopped. When operated to the raised position, with the operation of the seedling planting device 3 stopped as described above, hydraulic pressure is supplied into the hydraulic lifting cylinder 15 to move the left and right traveling wheels 10 downward, and the machine body 2 is raised. To make the float 5 ungrounded.

  Left and right side clutch levers 22 are provided below the left and right handle grips 14 a of the steering handle 14, and the left and right side clutches of the driving force transmission mechanism 4 are operated by the side clutch levers 22. . A planting depth adjusting lever 23 is provided on the left side of the rear frame 13 on the diagonally lower front side of the steering handle 14, and the body 2 of the pivot fulcrum shaft of each float 5 by operating the planting depth adjusting lever 23. By changing the vertical position of the seedling, the planting depth of the seedling by the seedling planting device 3 can be changed and adjusted.

  A seedling collection amount adjusting lever 24 is provided obliquely in front lower side of the steering handle 14 and on the right side of the rear frame 13, and the seedling placement stand 30 of the seedling planting device 3 is planted by operating the seedling amount adjusting lever 24. The vertical position with respect to the mechanism 31 is changed, and the amount of seedlings per strain by the planting mechanism 31 can be changed and adjusted.

  Above the rear part of the bonnet cover 18, a preliminary seedling stage 90 on which a supplementary seedling is placed is provided. The preliminary seedling stage 90 is configured by a frame body in which rods are combined, and is supported by a preliminary seedling stage support frame 26 having both ends attached to the front frame 12.

  The seedling mounting table 30 includes seedling mounting surfaces 30a corresponding to the number of planting strips partitioned in the left-right direction of the machine body 2, and a front plate 30b provided on the front end of the seedling mounting surface 30a and supporting the front end of the seedling (see FIG. 5 and the like). It is possible to load a mat-like seedling with soil on each seedling mounting surface 30a. Thereby, it is not necessary to return the seedlings prepared outside the field every time the seedlings loaded on the seedling mount 30 are planted, and continuous work can be performed, so that work efficiency is improved.

  The seedling stage 30 is supported by the front portion of the rear frame 13 so as to be movable in the left-right direction, and is configured to reciprocate left and right by the driving force from the driving force transmission mechanism 4. In addition, the seedling stage 30 is provided with a seedling feeding belt 33 for transferring each seedling to a seedling inlet 32 provided at the lower end of the seedling stage 30 at the left and right moving ends. The seedling feeding belt 33 is operated by the driving force from the driving force transmission mechanism 4, transfers one mat-like seedling at the left and right moving ends of the seedling mounting table 30, and supplies the seedling to the seedling inlet 32.

  The seedling planting device 3 is a so-called rotary seedling planting device, and can plant seedlings in a field in a plurality of sections or a plurality of rows in a seedling planting range. The walking type seedling transplanter 1 according to the embodiment is a so-called four-row planting in which seedlings are planted in four sections. The seedling planting device 3 includes a plurality of planting mechanisms 31 for planting seedlings placed on the seedling mount 30 in the field.

  The planting mechanism 31 is provided at the rear of the machine body 2 and in front of the seedling stage 30, and plants the seedlings loaded on the seedling stage 30 in the field. The planting mechanism 31 is provided for each of the strips, and includes planting ridges 34 (corresponding to a seedling planting unit) for planting seedlings loaded on one seedling mount 30 in the field. Yes. In the embodiment, the seedling planting device 3 is provided with a total of four planting mechanisms 31, and each of the four planting mechanisms 31 supplies one seedling that is supplied from the seedling mount 30 to the seedling inlet 32. It is a four-row planting structure in which four seedlings are planted at the same time on the field while scraping and running.

  The planting mechanism 31 is attached to a lower portion of planting transmission cases 43 and 44 described later of the driving force transmission mechanism 4. The planting mechanism 31 is arranged at intervals in the left-right direction, and is arranged on the front side of the seedling outlet 32 of the seedling mount 30. As illustrated in FIG. 3, the planting mechanism 31 includes a rotary rotating unit 35 and a planting basket 34.

  As shown in FIG. 3, the rotary rotating portion 35 is a rotating case 61 that is rotated by a driving force from the engine 11 by a planting transmission shaft 46 (shown in FIG. 6) and a planting driving shaft 46 b of the driving force transmission mechanism 4. An eccentric sun gear 62 (corresponding to an input rotator) rotatably accommodated in the rotating case 61, an eccentric planetary gear 63 (corresponding to an output rotator) rotatably accommodated in the rotating case 61, An eccentric counter gear 64 (corresponding to a relay rotating body) housed in the rotating case 61 is provided.

  The eccentric sun gear 62, the eccentric planetary gear 63, and the eccentric counter gear 64 are so-called eccentric gears whose outer peripheral surfaces are eccentric from the center of rotation. The eccentric sun gear 62 is accommodated in one end portion of the rotating case 61, attached to the planting drive shaft 46 b, and rotated by the driving force from the engine 11. The eccentric planetary gear 63 is accommodated in the other end portion of the rotating case 61, and the eccentric support shaft 65 of the implantation rod 34 is attached, and rotates in conjunction with the implantation rod 34. The eccentric planetary gear 63 and the eccentric support shaft 65 are fixed to each other by a so-called stepped key connection. The eccentric counter gear 64 is housed in the central portion of the rotating case 61, meshes with the eccentric sun gear 62 and the eccentric planetary gear 63, and transmits a driving force from the eccentric sun gear 62 to the eccentric planetary gear 63.

  The rotary rotating unit 35 rotates the rotating case 61 by the driving force from the engine 11 via the planting transmission shaft 46 of the driving force transmission mechanism 4 and the like, and rotates the implantation rod 34 by the driving force from the engine 11. Then, the tip of the planting claw 67 of the planting basket 34 is moved along the movement locus K indicated by a two-dot chain line in FIG. In addition, the rotation direction of the rotary case 61 of the rotary rotating unit 35 is opposite to the rotation direction of the traveling wheel 10 when moving forward. At the uppermost position Ka of the movement trajectory K, the planting cage 34 scrapes seedlings from the seedling stage 30 one by one. Depending on the degree of eccentricity of the gears 62, 63, 64, the movement trajectory K is from the time when the planting basket 34 starts scraping the seedling from the seedling stage 30 to the end of scraping the seedling at the uppermost position Ka of the movement trajectory K. The angle with respect to the front plate 30b is approximately 90 degrees, and hardly changes (or does not change at all).

  Further, the movement locus K has a lowest position Kb (a position where the seedling starts to be retracted after planting) depending on the degree of eccentricity of the gears 62, 63, 64, etc. The movement trajectory is on the rear side of the machine body 2 with respect to the lower end of the front plate 30b of the mounting table 30.

  As shown in FIG. 8, the movement trajectory K has a substantially constant movement trajectory from scraping the seedling to planting the seedling, depending on the degree of eccentricity of the gears 62, 63, and 64. In addition, T1-T14 shown in FIG. 8 has each shown the movement distance of the front-end | tip of the planting nail | claw 67 of the planting basket 34 per unit time, and these movement distances T1-T14 are substantially equal. .

  Further, when the tip of the implantation cage 34 is positioned at the lowest position Kb depending on the degree of eccentricity of the gears 62, 63, 64, the eccentric sun gear 62, the eccentric counter gear 64, and the eccentric planetary gear 63. As shown in FIG. 5, the straight line L connecting the centers of the two is a posture that gradually approaches the farm field toward the rear side of the machine body 2.

  Furthermore, as shown in FIG. 9, the movement trajectory K while the seedling transplanter 1 is running is a movement trajectory in which the tip of the planting claw 67 of the planting basket 34 reciprocates up and down. Further, at the time of the maximum number of shares, as shown in FIG. 9, the movement trajectories K intersect each other at the approximate center of the upper and lower dead points. Therefore, the seedling transplanter 1 can suppress the seedling planted from the planting plant 34 from coming into contact with the seedling planted earlier, improve the seedling planting accuracy, and suppress the seedling growth failure.

  The planting basket 34 is provided so as to be rotatable with respect to the rotary case 61 and takes a seedling from the seedling mount 30 to plant it in the field. As shown in FIGS. 3 and 4, the planting basket 34 is fixed to the eccentric support shaft 65, and is fixed to the planting basket case 66 and scrapes off the seedling from the seedling platform 30. A planting claw 67 (corresponding to a scraping member), an extrusion fork 68 (corresponding to an extrusion member), an operating arm 69, and an extrusion cam 70 are provided.

  The extrusion fork 68 is formed in a rod shape, and is provided so as to protrude and retract along the planting claw 67 in the planting cage case 66. The extrusion fork 68 protrudes from the non-extrusion position where most of the fork 68 is accommodated in the implantation rod case 66 shown in FIG. 4 and the implantation rod case 66 indicated by the solid line in FIG. The seedling case 66 is provided so as to be movable over the extrusion position where the seedling is pushed out to the field. At the push-out position, the push-out fork 68 protrudes from the planting claw case 66 to push out the seedling scraped off by the planting claw 67 to the field, separate the seedling from the planting claw 67, and plant it in the field. In the non-extrusion position, the push-out fork 68 is mostly accommodated in the planting ridge case 66 and the seedling scraped off by the planting claws 67 is not pushed out to the field. The pushing fork 68 is urged in a direction protruding from the implantation rod case 66 by a spring 71 (shown in FIG. 4) accommodated in the implantation rod case 66.

  The operating arm 69 is swingably provided in the implantation rod case 66, and one end portion thereof is engaged with the proximal end portion of the extrusion fork 68. The operating arm 69 swings to move the extrusion fork 68 between the non-extrusion position and the extrusion position.

  The push cam 70 is attached to the eccentric support shaft 65, rotates in conjunction with the eccentric planetary gear 63, and can come into contact with a cam portion 72 provided at the other end of the operating arm 69. The extrusion cam 70 is a so-called eccentric cam whose outer peripheral surface is eccentric from the center of rotation. The pushing cam 70 abuts against the cam portion 72 of the operating arm 69, the tip of the planting claw 67 of the planting basket 34 is slightly above the lowest position Kb of the movement track K and the front plate of the seedling stage 30. Until the seedling planting position Kc (shown in FIG. 5) on the rear side of the machine body 2 from the lower end of 30b, the operating arm 69 holds the push fork 68 in the non-push position against the biasing force of the spring 71. The seedling planting position Kc is a position for planting a seedling that is a planting cage 34 in the field.

  When the tip of the planting claw 67 of the planting basket 34 is located at the seedling planting position Kc, the push cam 70 does not come into contact with the cam portion 72, and the pushing fork 68 is attached to the operating arm 69 by the biasing force of the spring 71. The seedling scraped off by the planting claw 67 is set to an extrusion position for extruding to the field. Then, when the tip of the planting claw 67 of the planting basket 34 is located at the lowest position Kb, the push cam 70 starts to come into contact with the cam portion 72 and resists the urging force of the spring 71 to push the push fork 68 off. Move to the extrusion position. As described above, when the tip of the planting claw 67 of the planting basket 34 is located between the seedling planting position Kc and the lowest position Kb, the push-out cam 70 sets the push-out fork 68 to the push-out position, so that the planting claw The seedling scraped off at the tip of 67 is planted in the field. When the tip of the planting claw 67 of the planting basket 34 is located at another position, the push cam 70 contacts the cam portion 72 and holds the push fork 68 in the non-pushing position. In addition, the planting basket 34 has a seedling planting position Kc above the lowest position Kb of the movement locus K of the tip of the planting claw 67 of the planting basket 34 and the lower end of the front plate 30b of the seedling stage 30. Rather than the airframe 2 rear side.

  Further, as shown in FIG. 4, the push cam 70 and the operation arm 69 are cam portions 72 on a straight line L1 connecting the rotation center of the push cam 70 and the swing center of the operation arm 69 at the seedling planting position Kc. The tip of the is arranged. For this reason, the rotating case 61 can be smoothly rotated when the extrusion fork 68 is protruded.

  Lubricating oil is injected into the implant cage case 66 of the implant cage 34. For this purpose, the planting basket 34 includes an lubrication port 73 that lubricates lubricating oil inside the planting basket case 66, and the planting basket 34 is implanted when the planting basket 34 is located at the seedling planting position Kc. It is arranged at the upper end of the saddle case 66 and on the rear surface of the machine body 2. Further, a lid 74 for restricting leakage of the lubricating oil is attached to the oil filling port 73 except when lubricating oil is poured, that is, during seedling planting work.

  The planting cage 34 scrapes the seedlings in the seedling inlet 32 loaded on the seedling platform 30 at the tip of the planting claw 67 one by one, descends by the rotation of the rotating case 61, and scrapes the seedlings scraped off. Is planted in the field at the seedling planting position Kc. Then, the planting basket 34 rises again by the rotation of the rotary case 61 and scrapes the next seedlings one by one. Thus, the planting mechanism 31 is configured to rotate the planting cage 34 with respect to the rotating case 61 while the rotating case 61 is rotated, and to transfer the seedlings on which the planting cage 34 is loaded on the seedling platform 30 to the field. To plant. Further, the planting mechanism 31 is configured such that when the seedling amount per strain is adjusted by operating the seedling amount adjusting lever 24, the straight line L gradually moves away from the planting drive shaft 46b. 2 The rotating case 61 is inclined so as to be directed forward and upward. Therefore, adjustment of the amount of seedling removal becomes easy.

  Further, as shown in FIG. 5, the implant cage 34 is located at the lowest position of the outer surface of the rotating case 61 and the movement locus K, rather than the distance D1 between the rotation center of the eccentric sun gear 62 and the rotation center of the eccentric planetary gear 63. The distance D2 from Kb is formed large. Therefore, the planting mechanism 31 can increase the adjustment range of the planting depth.

  The driving force transmission mechanism 4 includes a main transmission case 40 provided on the rear side of the engine 11, a traveling transmission case 41 provided on each of the left and right sides of the main transmission case 40, and a planting transmission mechanism 42 (shown in FIG. 6). And. The main transmission case 40 is attached to the front end portion of the front frame 12. The main transmission case 40 accommodates the output shaft of the engine 11 and the driving force from the engine 11 is transmitted.

  In the main transmission case 40, the driving wheel 10 for driving force from the engine 11, a main clutch that can cut off all transmission to the seedling planting device 3, and the driving force from the main clutch to the driving wheel 10. A power branching portion that branches into a transmission path and a transmission path to the seedling planting device 3; a planting clutch that can cut off transmission to the seedling planting device 3 on the transmission path to the seedling planting device 3; By switching the gear meshing on the transmission path to the traveling wheel 10, it is switched to a forward high speed state for traveling on the road, a forward low speed state for planting work, a neutral state where the gear is not meshed and non-transmission, and a reverse state. And a left and right side clutch that can switch the transmission to the left and right traveling wheels 10 to the non-transmission state on the lower transmission side of the transmission. Therefore, in the transmission path to the traveling wheel 10, the driving force from the engine 11 is transmitted to the left and right traveling transmission shafts (not shown) protruding left and right from the main transmission case 40 via the transmission and the side clutch. Is done.

  The traveling transmission case 41 accommodates the traveling transmission shaft of the main transmission case 40, and is transmitted to the axle 10 a projecting outward from the traveling transmission case 41 by a sprocket and a chain in the traveling transmission case 41, The traveling wheel 10 is rotationally driven. The traveling transmission case 41 is provided so as to be rotatable up and down around the traveling transmission shaft located at the front end, and moves the axle 10 a up and down to move the traveling wheel 10 up and down.

  As shown in FIG. 6, the planting transmission mechanism 42 extends from the main transmission case 40 to the rear side, and a transmission shaft (not shown) through which the driving force from the engine 11 is transmitted through the planting clutch, A center planting transmission case 43, an outer planting transmission case 44 (shown in FIG. 1), and a reciprocating sliding mechanism 45 are provided.

  The center planting transmission case 43 is provided at the center in the left-right direction and is disposed on the front end of the rear frame 13. The center planting transmission case 43 includes the rear end (not shown) of the transmission shaft, the central portion of the planting transmission shaft 46, and the eccentricity of the two planting mechanisms 31 at the center of the four planting mechanisms 31. The planting drive shaft 46b to which the sun gear 62 is attached is rotatably accommodated. Further, the central planting transmission case 43 accommodates a transmission mechanism (not shown) composed of a sprocket, a chain, or the like that transmits a driving force from the planting transmission shaft 46 to the planting drive shaft 46b. The driving force from the engine 11 transmitted through the transmission shaft is transmitted to the planting transmission shaft 46 by a rear end of the transmission shaft and a bevel gear 47 (shown in FIG. 6) fixed to the planting transmission shaft 46. The planting transmission shaft 46 is rotationally driven around the axis. That is, the planting transmission shaft 46 is rotated by the driving force from the engine 11. The driving force from the engine 11 transmitted to the planting transmission shaft 46 is transmitted to the planting drive shafts 46b of the two central planting mechanisms 31 via the transmission mechanism, and these two planting mechanisms in the middle. While rotating the rotation case 61 of 31, the implantation rod 34 is rotated with respect to the rotation case 61.

  The outer planting transmission case 44 is provided on the left and right sides of the central planting transmission case 43, and is attached to the central planting transmission case 43 via a cylindrical case 46a (shown in FIG. 6) that houses the planting transmission shaft 46. ing. The outer planting transmission case 44 rotatably accommodates an end portion of the planting transmission shaft 46 and a planting drive shaft 46b to which the eccentric sun gear 62 of one of the left and right outer planting mechanisms 31 is attached. ing. The outer planting transmission case 44 accommodates a transmission mechanism (not shown) composed of a sprocket, a chain, or the like that transmits a driving force from the planting transmission shaft 46 to the planting drive shaft 46b. The driving force from the engine 11 transmitted through the planting transmission shaft 46 is transmitted to one outer planting mechanism 31 via a transmission mechanism including a sprocket fixed to the end of the planting transmission shaft 46. The rotation case 61 of this one planting mechanism 31 is rotated, and the implantation rod 34 is rotated with respect to the rotation case 61. That is, the planting drive shaft 46 b rotates the eccentric sun gear 62 of the planting mechanism 31 of the seedling planting device 3 by the driving force from the planting transmission shaft 46. Thus, the planting transmission shaft 46 transmits the driving force from the engine 11 to the seedling planting device 3. Further, the seedling transplanting machine 1 has the planting transmission shaft 46 disposed on the rear side of the machine body 2 from the outer edge of the traveling wheel 10.

  The reciprocating sliding mechanism 45 reciprocates the seedling mounting table 30 in the left-right direction of the machine body 2. As shown in FIG. 6, the reciprocating sliding mechanism 45 includes a lead cam shaft 48 and a sliding shaft 49. The lead cam shaft 48 is accommodated in the central planting transmission case 43 in a state where the longitudinal direction is parallel to the left-right direction, the movement in the left-right direction is restricted and the rotation around the axis is allowed. The lead cam shaft 48 is transmitted about the driving force of the engine 11 from the planting transmission shaft 46, and rotates around the shaft center by the driving force from the engine 11. That is, the planting transmission shaft 46 transmits the driving force from the engine 11 to the lead cam shaft 48.

  The sliding shaft 49 is housed in the center planting transmission case 43 at the center. The slide shaft 49 is fixed to a lead cam 49 a that engages with the cam of the lead cam shaft 48, contacts the lead cam shaft 48, and reciprocates in the left-right direction by the rotation of the lead cam shaft 48. At both ends of the sliding shaft 49, connecting members 49b (shown in FIG. 1) attached to both ends of the seedling mount 30 are attached. When the slide shaft 49 reciprocates in the left-right direction by the rotation of the lead cam shaft 48, the slide shaft 49 reciprocates in the left-right direction of the machine body 2.

  Further, as shown in FIG. 1, the center planting transmission case 43 and the outer planting transmission case 44 have a planting transmission shaft 46, a planting drive shaft 46 b, and a sliding shaft in a side view of the seedling transplanter 1. 49 are arranged on a straight line in the vertical direction. Further, in the center planting transmission case 43 and the outer planting transmission case 44, the planting transmission shaft 46 is arranged on the rear side of the machine body 2 with respect to the outer edge of the traveling wheel 10.

  Further, the driving force transmission mechanism 4 is arranged such that the straight line L is located at a position where the planting clutch in the main transmission case 40 stops transmission of the driving force to the seedling planting device 3 and stops the rotating case 61. As the distance from 46b increases, the position is gradually rearward and downward. By stopping the rotating case 61 at such a position, the driving force transmission mechanism 4 can suppress reverse rotation when the rotating case 61 is stopped, and can suppress abnormal noise generated from a pawl of the planting clutch.

  The float 5 is provided in the lower part of the machine body 2 and comes into contact with the surface of the field with the movement of the machine body 2 and slides on the surface of the field to level the ground. As shown in FIG. 3 and the like, the seedling transplanter 1 includes a center float 51 provided at the center in the left-right direction of the body 2 and a pair of left and right sides of the center float 51. It consists of three pieces with the side float 52. The walking-type seedling transplanter 1 includes a traveling wheel 10 between a center float 51 and a pair of side floats 52.

  The center float 51 levels the position where the seedlings of the two planting mechanisms 31 in the center are planted, and the side float 52 levels the position where the seedlings of each one planting mechanism 31 are planted. The center float 51 has a front end positioned in front of the front end of the side float 52, has a longer front-rear length than the side float 52, a wider left-right width than the side float 52, and a larger ground contact area than the side float 52. The center float 51 and the side float 52 are supported so as to be pivotable up and down around the respective pivot shafts 53 arranged in the same position of the rear frame 13 in the side view of the seedling transplanter 1. The front part moves up and down according to the surface of the field.

  Further, as shown in FIG. 7, the center float 51 and the side float 52 are arranged on the front side of the body 2 of the planting rod 34 that is positioned in the vicinity of the seedling planting position Kc and the seedling planting position Kc of the seedling planting apparatus 3. And the planting notch part 54 which permits the planting basket 34 to plant a seedling in the vicinity of the planting basket 34 is provided. In addition, since the structure of the planting notch part 54 is equal to the structure of the center float 51 and the side float 52, in FIG. 7, the center float 51 is shown as a representative. The planting notch portion 54 is arranged in the front-rear direction with the planting pot 34 positioned in the vicinity of the seedling planting position Kc and the seedling planting position Kc, and is disposed immediately in front of the planting pot 34.

  The planting cutout portion 54 is formed by forming the floats 51 and 52 narrower than the front end portions of the floats 51 and 52, as if part of the floats 51 and 52 are cut out. Moreover, the inner edge part of the planting notch part 54 of the floats 51 and 52 is hollowly formed by a pair of walls 55a and 55b which are spaced apart in the vertical direction and whose outer edges are connected to each other. For this reason, the floats 51 and 52 are reduced in weight, and can suppress that the surface of a field is pushed too much, mud of the field rides on the surface of the floats 51 and 52, and the floats 51 and 52 sink into the field. Can be suppressed.

  Further, as shown in FIG. 1, the center planting transmission case 43 and the outer planting transmission case 44 have a planting drive shaft 46 b disposed on the front side of the body 2 relative to the rotation shaft 53 of the floats 51 and 52. .

  A protective frame 80 that protects the engine 11, the main transmission case 40, the hood cover 18, and the like from obstacles in front of the airframe 2 is provided at the front of the airframe 2. The protective frame 80 includes left and right attachment portions 80a extending from the left and right side surfaces of the main transmission case 40 to the left and right outer sides, and a protection portion 80b serving as an outer edge of the machine body 2 connecting the left and right attachment portions 80a. The protection portion 80b is configured such that the left and right center portion extends horizontally and is located at the frontmost side, and the left and right outer portions are located at the rear side as going to the left and right outside.

  The control device controls the above-described components constituting the seedling transplanter 1. The control device executes, for example, engine control for controlling the engine 11.

  In the seedling transplanting machine 1 described above, when seedlings are planted in the field, the operator holds the left and right handle grips 14a of the steering handle 14, operates the planting lift lever 21 to the planting position, and lowers the machine body 2 At the same time, the seedling planting device 3 is put into an operable state, and the seedling planting device 3 is operated while operating the main clutch lever 20 to the on position so that the vehicle body 2 travels. Planting. When reaching the headland in the field, the planting lift lever 21 is operated to the raised position to stop the operation of the seedling planting device 3 and the machine body 2 is raised, and the traveling transmission case 41 is rotated downward to float 51. , 52 is floated from the field, the side clutch lever 22 on the inner side of the turn is operated to disconnect the side clutch of the traveling wheel 10 on the inner side of the turn, and the body 2 is turned.

  As described above, according to the configuration of the seedling transplanter 1 of the present embodiment, since the rotation direction of the rotating case 61 is opposite to the rotation direction of the traveling wheel 10, the planting rod 34 jumps when planting seedlings. The mud to be raised will be blown to the front side of the body 2. For this reason, it can suppress that mud covers and crushes a seedling and prevents photosynthesis, and can suppress the growth failure of a seedling.

  Further, the movement trajectory K of the tip of the planting claw 67 of the planting basket 34 is set to the lowest position Kb at which the tip of the planting claw 67 of the planting basket 34 begins to retreat upward. The movement locus K is on the rear side of the airframe 2 with respect to the lower end. For this reason, the seedling planted by the planting basket 34 can be prevented from coming into contact with the lower end of the seedling mount 30, the seedling can be prevented from being overturned or the seedling can be damaged, and the seedling can be prevented from growing poorly. can do.

  According to the seedling transplanting machine 1, the center of the eccentric sun gear 62, the eccentric counter gear 64, and the eccentric planetary gear 63 is connected when the tip of the planting claw 67 of the planting cage 34 is positioned at the lowest position Kb. The straight line L is a posture that approaches the farm as it goes rearward. For this reason, when pulling up the implant cage 34 from the lowest position Kb, the mass of the rotating case 61 acts as a force that strengthens the rotation of the rotating case 61. Therefore, since the rotational load applied when the planting basket 34 is pulled up can be suppressed by the mass of the rotating case 61, the rotation of the rotating case 61 can be prevented from being disturbed, and the seedling planting accuracy is improved.

  Further, according to the seedling transplanter 1, the seedling planting position Kc is above the lowest position Kb of the movement locus K of the tip of the planting claw 67 of the planting basket 34 and on the front plate 30b of the seedling mount 30. The lower end of the rotating case 61 has already passed over the seedling when the seedling is planted, because the rear side of the machine body 2 is located behind the lower end. Therefore, it is possible to suppress the seedling from being pushed down or damaged, to suppress the growth failure of the seedling, and to improve the seedling planting accuracy.

  According to the seedling transplanter 1, the planting drive shaft 46b, the planting transmission shaft 46, and the sliding shaft 49 are arranged on a straight line in the vertical direction. The front and rear widths of the accompanying transmission cases 43 and 44 can be suppressed, and the size of the airframe 2 can be reduced.

  Further, according to the seedling transplanter 1, since the planting transmission shaft 46 is disposed on the rear side of the machine body 2 with respect to the outer edge of the traveling wheel 10, the operator can remove the traveling wheel 10 without removing the traveling wheel 10. Can be maintained.

  According to the seedling transplanter 1, since the planting notch 54 is disposed immediately in front of and in the vicinity of the planting basket 34, the portion of the surface of the field where the seedling of the seedling planting device 3 is planted is surely leveled. be able to. Therefore, the planting accuracy of the seedling can be improved.

  According to the seedling transplanter 1, the lubrication port 73 of the planting rod 34 is disposed on the upper end portion of the planting rod 34 and on the surface on the rear side of the machine body 2. Can be improved and maintainability can be improved.

[Modification]
A walking type seedling transplanter 1 according to a modification of the embodiment of the present invention will be described with reference to FIGS. 10 and 11. FIG. 10 is a cross-sectional view of a planting mechanism of a walking seedling transplanter according to a modification of the embodiment. Fig.11 (a) is a figure explaining the planting mechanism which scrapes off the seedling of the walk type seedling transplanter which concerns on the modification of embodiment. FIG.11 (b) is a figure explaining the state which the planting mechanism shown by Fig.11 (a) rotates toward a seedling planting position. FIG.11 (c) is a figure explaining the state by which the planting mechanism shown by FIG.11 (b) was located in the seedling planting position. FIG.11 (d) is a figure explaining the state which the planting mechanism shown by FIG.11 (c) evacuated upwards. In FIG. 10 and FIG. 11, the same parts as those of the embodiment are denoted by the same reference numerals and description thereof is omitted.

  A seedling planting device 3 of a walking type seedling transplanting machine 1 according to a modification of the embodiment of the present invention is rotatably accommodated in a rotating case 61 and meshes with an eccentric sun gear 62 as shown in FIG. A core driven gear 75 (corresponding to a driven rotating body) and a driven eccentric shaft 76 (corresponding to a driven rotating shaft) having one end rotatably accommodated in the rotating case 61 and having an eccentric driven gear 75 attached to one end. ) And a balance weight 77 attached to the driven eccentric shaft 76.

  The eccentric driven gear 75 is a so-called eccentric gear. The driven eccentric shaft 76 is attached with an eccentric driven gear 75 and rotates together with the eccentric driven gear 75. The balance weight 77 is attached to the other end portion of the driven eccentric shaft 76 that protrudes outside the rotation case 61, and is provided between the rotation case 61 and the implantation rod 34. As shown in FIG. 11, the balance weight 77 is formed to have a wider width (a sector or a triangle) as it moves away from the driven eccentric shaft 76 when viewed from the side of the seedling transplanter 1.

  In the modification, the angle θ formed by the straight line L2 connecting the rotation centers of the eccentric sun gear 62, the eccentric counter gear 64, the eccentric planetary gear 63, and the eccentric driven gear 75 and the center line P of the balance weight 77 is As the angle becomes smaller than 90 degrees, the force for further assisting the rotation of the rotating case 61 with the mass of the balance weight 77 becomes stronger. That is, as the angle θ decreases, the mass of the balance weight 77 assists the rotation of the rotating case 61 with a stronger force. Note that the angle θ means that the eccentric sun gear 62 is separated from the other gears 63, 64, and 75 by a straight line L 2 and the balance weight 77 is divided into two equal parts, and the outer circumference of the balance weight 77 from the driven eccentric shaft 76. It is an angle formed with the center line P in the direction toward.

  In the modified example, the implantation rod 34 is positioned at the uppermost position Ka of the movement track K depending on the degree of eccentricity of the eccentric driven gear 75 and the driven eccentric shaft 76 and the mounting position of the balance weight 77 with respect to the driven eccentric shaft 76. The angle θ formed between the straight line L2 and the center line P when scraping off the seedling is an angle smaller than 90 degrees as shown in FIG. Further, in the modified example, the implantation rod 34 is seeded from the uppermost position Ka of the movement locus K according to the degree of eccentricity of the eccentric driven gear 75 and the driven eccentric shaft 76 and the mounting position of the balance weight 77 with respect to the driven eccentric shaft 76. The angle θ between the straight line L2 and the center line P when moving toward the planting position Kc is an angle smaller than 90 degrees as shown in FIG. Further, in the modified example, the planting rod 34 is moved along the locus K by the eccentric degree of the eccentric driven gear 75 and the driven eccentric shaft 76 and the attachment position of the balance weight 77 with respect to the driven eccentric shaft 76. The angle θ formed by the straight line L2 and the center line P when positioned at is an angle smaller than 90 degrees as shown in FIG. The angle θ is 6.64 degrees in FIG. 11A, 51.45 degrees in FIG. 11B, and 32 degrees in FIG. 11C.

  Further, in the modified example, the planting rod 34 is moved along the locus K by the eccentric degree of the eccentric driven gear 75 and the driven eccentric shaft 76 and the attachment position of the balance weight 77 with respect to the driven eccentric shaft 76. The angle θ formed by the straight line L2 and the center line P when moving from the uppermost position Ka toward the uppermost position Ka is an angle larger than 90 degrees as shown in FIG. Note that the angle θ is 92.44 degrees in FIG.

  In this way, the balance weight 77 assists (biases) the rotation of the rotating case 61 by its mass at least from the uppermost position Ka of the movement locus K to the seedling planting position Kc.

  According to the walking seedling transplanter 1 according to the modification of the embodiment, similarly to the embodiment, it is possible to suppress the growth failure of the seedling and improve the seedling planting accuracy. Further, according to the walking type seedling transplanter 1 according to the modification, the balance weight 77 is attached to the driven eccentric shaft 76, so that the rotation of the rotary case 61 is assisted when the mass of the balance weight 77 is necessary. Can act as a force.

  Further, the angle formed by the straight line L2 connecting the centers of the eccentric sun gear 62, the eccentric counter gear 64, the eccentric planetary gear 63, and the eccentric driven gear 75 and the center line P of the balance weight 77 is smaller than 90 degrees. Accordingly, the force for assisting the rotation of the rotating case 61 having the mass of the balance weight 77 is increased. For this reason, it can suppress that rotation of rotation case 61 is disturbed by backlash between gears 62, 63, 64, and 75, and can improve seedling planting accuracy. In particular, the balance weight 77 assists (rotates) the rotation of the rotating case 61 by its mass from at least the uppermost position Ka of the movement locus K to the seedling planting position Kc, so that the seedling is scraped and planted. The rotation of the rotating case 61 can be prevented from being disturbed, and the seedling planting accuracy can be improved.

  In addition, this invention is not limited to the said embodiment and modification. That is, various combinations of components can be implemented without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Walking type seedling transplanter 2 Airframe 3 Seedling planting device 10 Traveling wheel 11 Engine 30 Seedling stand (seedling placement member)
34 Implanting rod 45 Reciprocating sliding mechanism 46 Planting transmission shaft 46b Planting drive shaft 48 Lead cam shaft 49 Sliding shaft 51 Center float (float)
52 Side float (float)
53 Rotating shaft 61 Rotating case 62 Eccentric sun gear (input rotating body)
63 Eccentric planetary gear (output rotating body)
64 Eccentric counter gear (relay rotating body)
67 Planting nails (scraping member)
68 Extrusion fork (extrusion member)
69 Actuating arm 70 Push-out cam 73 Lubrication port 75 Eccentric driven gear (driven rotator)
76 Driven eccentric shaft (driven rotary shaft)
77 Balance weight K Movement locus Kb Bottom position Kc Seedling placement position L, L2 Straight line P Center line θ Angle

Claims (8)

An aircraft equipped with left and right traveling wheels traveling in a field;
A seedling mounting member which is provided at the rear of the machine body and mounts seedlings;
In a walking-type seedling transplanter equipped with a seedling planting device for taking seedlings from the seedling placing member and planting them in a field,
The seedling planting device
A rotating case that is rotated by a driving force from an engine provided in the airframe;
An imbedded paddle that is provided so as to be rotatable with respect to the rotating case and takes a seedling from the seedling placing member and is planted in a field;
An input rotating body housed in the rotating case and rotated by a driving force from the engine;
A driven rotating body housed in the rotating case and meshing with the input rotating body;
A driven rotary shaft that rotates with the driven rotary body;
A balance weight attached to the driven rotary shaft and gradually formed wider as it moves away from the driven rotary shaft ,
The rotation direction of the rotating case is opposite to the rotation direction of the traveling wheel,
The walking trajectory of the tip of the planting rod is a walking trajectory in which the position at which the seedling starts to retreat upward after planting is the rear trajectory side of the lower end of the seedling placing member. Mold seedling transplanter. The seedling planting device,
An output rotary member that is accommodated before Symbol the rotatable case, and rotates in conjunction with the implant rod,
A relay rotating body housed in the rotating case and transmitting a driving force from the input rotating body to the output rotating body,
When the tip of the planting ridge is positioned at the lowest position of the movement trajectory, the straight line connecting the centers of the input rotator, the relay rotator, and the output rotator moves toward the rear side of the machine body. The walking seedling transplanter according to claim 1, wherein the walking seedling transplanter is in a posture of approaching to the head. A straight line entering-force rotating member and said intermediary rotary member and the output rotary member connecting the centers of the driven rotating body, the angle between the center line of the balance weight according to become smaller than 90 degrees, the balance The walking seedling transplanter according to claim 2, wherein a force of assisting rotation of the rotating case with a weight mass is increased. The planting pot is
A scraping member for scraping off the seedling from the seedling placing member;
An extruding member provided movably across an extruding position and a non-extruding position for extruding the seedling scraped off by the scraping member to a field;
An actuating arm for moving the push member between the push position and the non-push position;
While rotating in conjunction with the output rotator and until the seedling planting position for planting seedlings in a field, the operating arm holds the push member in the non-extrusion position and is positioned in the seedling planting position. An extrusion cam for causing the operating arm to place the push member in the push position,
The said seedling planting position is located above the lowest position of the movement trajectory of the tip of the planting ridge and on the rear side of the machine body from the lower end of the seedling placing member. Item 4. A walking seedling transplanter according to item 3. A reciprocating sliding mechanism for reciprocatingly sliding the seedling placing member in the left-right direction of the machine body,
The reciprocating sliding mechanism is
A lead cam shaft that rotates by a driving force from the engine;
A sliding shaft for sliding the seedling placing member in the left-right direction of the machine body by rotation of the lead cam shaft,
A planting transmission shaft that rotates by a driving force from the engine and transmits the driving force to the lead cam shaft and the seedling planting device;
A planting drive shaft that rotates an input rotating body of the seedling planting device by a driving force from the planting transmission shaft, and
The walking according to any one of claims 1 to 4, wherein the planting transmission shaft, the planting drive shaft, and the sliding shaft are arranged on a straight line in a vertical direction. Mold seedling transplanter. The planting transmission shaft that transmits a driving force to the seedling planting device is disposed on the rear side of the body with respect to the outer edge of the traveling wheel. Walking seedling transplanter. Provided with a float that is provided at the lower part of the aircraft and moves up and down in accordance with the surface of the field in contact with the surface of the field;
Arranging the planting drive shaft of the seedling planting device on the front side of the machine from the pivot shaft of the float,
The float is provided with a planting notch that allows the planting basket to plant seedlings on the front side of the planting basket in the seedling planting device and in the vicinity of the planting basket. The walking seedling transplanter according to any one of claims 1 to 6. The said implantation gutter is provided with the oil inlet which lubricates lubricating oil inside, and has arrange | positioned the said oil inlet in the upper end part and the fuselage rear side. Any one of Claims 1-7 characterized by the above-mentioned. The walking-type seedling transplanter as described in 1.

Images