JP4643252B2 - Rice transplanter planting equipment - Google Patents

Description

  The present invention comprises a rice planting machine that comprises a seedling mounting table that reciprocates left and right, and a seedling planting mechanism that cuts out and plantes one seedling from the seedling mounting table with planting claws, and performs rice transplanting work continuously In particular, the present invention relates to an extrusion tool that is slidably disposed on a planting claw for cutting out a seedling.

  Conventionally, in a planting device of a rice transplanter, a rotary seedling planting mechanism is arranged to rotate a rotating case driven by power transmitted from a power source so as to rotate about a substantially horizontal horizontal axis. A plurality of planting shafts are supported on the outer periphery of the case in parallel with the axis, and a planting claw case having a pair of planting claws on each planting shaft is placed on the seedling stage side. Planted so that the tip of the planting claw draws a substantially elliptical closed-loop trajectory that is vertically long between the lower end of the seedling platform and the field scene as the rotating case rotates. It was comprised so that a nail | claw case might rotate (for example, refer patent document 1).

An extruding tool comprising an extruding shaft and an extruding piece fixed to one end of the extruding shaft is arranged in parallel on the planting claw provided in the rotary seedling planting mechanism, and can slide on the planting claw. And when the tip of the planting claw enters the field, by sliding the pushing piece toward the tip of the planting claw with the pushing shaft and pushing the seedling at the tip of the planting claw to the field scene, It was configured to reliably plant seedlings.
JP-A-8-331953

  However, in the conventional planting device of the rice transplanter, the pusher provided with the planting claw in the rotary seedling planting mechanism is the tip of the push shaft inside the push piece configured in a cross-sectional “U” shape. Therefore, when both the planting nails enter the field and push out the seedling, a large hole is formed by the extruded piece and the extrusion shaft, and the seedling at the tip of the planting nail The contact area was small and the seedlings could not be pushed out firmly. In addition, there is a problem that the contact area between the extruded piece and the seedling at the tip of the planting claw cannot be sufficiently secured, the holding power of the seedling is weak, and the holding angle is not stable.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

In the planting device of a rice transplanter (1) provided with the rotary type seedling planting mechanism (10) which attached the planting nail (36) to the planting nail case (35), the planting nail (36 ) Is provided with an extruding tool so as to be movable between the bifurcated holding portions (55, 55). The extruding tool is provided with an extruding shaft (41) and a tip side of the extruding shaft (41). The extruded piece (42) is formed in a U-shaped cross-sectional view by bending the left and right sides of the plate-like member upward, and is formed on the extruded shaft (41). Extending from the tip, the tip of the push shaft (41) and the fixed portion of the base (42a) of the push piece (42) are shaved by the thickness of the push piece (42), and the push piece (42). The front surface of the base (42a) and the front end of the extrusion shaft (41) There were fixed form to be substantially the same height, the tip portion of the extruded piece (42) (42b) is a vertical side so as to approach the surface of the nail with the plant (36) It protrudes forward and has a wider side view than the base (42a), and the tip of the tip (42b) opposite the planting claw (36) is the tip of the planting claw (36). Is formed in a curved surface (42d) having substantially the same shape along the movement locus (40a) drawn by the planting claw (36) when the seedling is pushed out when the tip of the planting claw (36) enters the farm scene (12). ) So that the planting posture of the seedling is not broken, and the end of the pushing piece (42) on the side of the planting claw (36) is viewed from the side. in constructed on the contact surface chamfered (42c), the size contact area with the seedlings at the tip of the nail with the plant (36) And become not configured, among the contact surface (42c), the most part of the planting claw (36) side, formed to be substantially vertical surface to the rear surface of the pawl with the plant (36) (42e), wherein In this configuration, the space between the extruded piece (42) and the planting claw (36) is not wedge-shaped .

  As effects of the present invention, the following effects can be obtained.

The present invention, as described in claim 1, in a planting device of a rice transplanter (1) comprising a rotary seedling planting mechanism (10) having a planting claw (36) attached to a planting claw case (35), An extruding tool is disposed on the planting claw (36) so as to be movable between the holding portions (55, 55) formed in a bifurcated shape. The extruding tool includes an extruding shaft (41) and the extruding shaft. (41) is formed from an extruding piece (42) fixed to the front end side, and the extruding piece (42) is formed in a U-shaped cross-sectional view by bending the left and right sides of the plate member upward, Extending from the distal end of the extrusion shaft (41), the distal end of the extrusion shaft (41) and the fixed portion of the base portion (42a) of the extrusion piece (42) are cut by the thickness of the extrusion piece (42) side, The inner front surface of the base (42a) of the extruded piece (42) and the extruded shaft (41 Front fixed form to be substantially the same height of the tip of the tip portion of the extruded piece (42) (42b) is vertical sides to be close to the surface of the nail with the plant (36) And projecting forward and having a width in a side view larger than that of the base portion (42a). The tip of the tip portion (42b) opposite to the planting claw (36) 36) is formed on a curved surface (42d) having substantially the same shape along the movement locus (40a) drawn by the tip of the plant 36). Since a large hole is not drilled by the attached nail (36) and the planting posture of the seedling is not broken , the hole formed by the planting nail and the pushing piece entering the field scene is made as small as possible. And increase the contact area between the extruded piece and the seedling at the tip of the planting claw. , It can be planted firmly push out the seedlings in the extruded piece.

Further, the end of the pushing piece (42) on the planting claw (36) side at the tip (42b) is chamfered in a side view to form a contact surface (42c), and the planting claw (36) Since the contact area with the seedling at the tip does not increase, the contact area with the seedling at the tip of the planting claw 36 can be further increased so that the seedling is not damaged. .
Further, when the extruding piece 42 slides in the longitudinal direction toward the tip of the planting claw 36, it becomes possible to secure as much time as possible for holding the seedling with the planting claw 36, and the extruding piece 42 is provided. As well as improving the holding power of the seedling, the holding angle of the seedling can be stabilized.
Therefore, when the extruding piece slides in the longitudinal direction toward the tip of the planting claw, it is possible to secure as much time as possible for holding the seedling with the planting claw, and holding the seedling by the extruding piece. The force can be improved and the holding angle can be stabilized.

The portion of the contact surface (42c) closest to the planting claw (36) is formed to be a substantially vertical surface (42e) with respect to the rear surface of the planting claw (36). (42) and the planting claw (36) are not wedge-shaped, so when the extruded piece slides in the longitudinal direction toward the tip of the planted claw, the extruded piece and the planted claw It is possible to prevent the seedling from being sandwiched between the two, and to reliably push out the seedling at the tip of the planting claw with the pushing piece.

  Next, embodiments of the invention will be described. 1 is a side view of a riding type rice transplanter, FIG. 2 is a plan view of the riding type rice transplanter, FIG. 3 is an enlarged side view of the main part of the planting apparatus in FIG. 1, and FIG. 4 is a sectional view taken along line IV-IV in FIG. 5 is an enlarged sectional view taken along line VV in FIG. 3, FIG. 6 is an enlarged sectional view taken along line VI-VI in FIG. 5, and FIG. 7 is a perspective view of the planting claw case and the planting claw.

  8 is a perspective view of the planting claw, FIG. 9 is a front view of the planting claw, FIG. 10 is a rear view of the planting claw, FIG. 11 is a left side view of the planting claw, and FIG. 13 is a plan view of the planting claw, FIG. 14 is a bottom view of the planting claw, FIG. 15 is a sectional view taken along line VII-VII in FIG. 9, FIG. 16 is a sectional view taken along line VIII-VIII in FIG. FIG. 3 is a perspective view of an extrusion tool.

  18 is a front view of the pusher, FIG. 19 is a rear view of the pusher, FIG. 20 is a left side view of the pusher, FIG. 21 is a right side view of the pusher, FIG. 22 is a plan view of the pusher, and FIG. FIG. 24 is a cross-sectional view taken along the line IX-IX in FIG.

  In this embodiment, a riding type rice transplanter to which the planting apparatus of the present invention is applied will be described as an 8-row riding type rice transplanter, but the planting apparatus is not limited to an 8-row riding type rice transplanter. The present invention can also be applied to riding type and walking type rice transplanters for the number of streaks. Moreover, although the planting mechanism is described as a rotary type, it can also be applied to a crank type. As shown in FIGS. 1 and 2, the rice transplanter 1 has a traveling machine body 2 supported by a pair of left and right front wheels and a rear wheel, and a planting device 5 attached to a rear portion of the traveling machine body 2 so as to be movable up and down. And are provided. The traveling machine body 2 is provided with a control seat 7 and is equipped with an engine 6 and a traveling mission 8 for appropriately shifting the power from the engine 6 and transmitting it to the front wheels and the rear wheels. The vehicle is configured to travel forward at an appropriate speed in the direction indicated by the arrow A.

  The planting device 5 includes a transmission case 9 to which power is transmitted from the engine 6, eight rotary seedling planting mechanisms 10 that are arranged in the transmission case 9 in parallel at appropriate intervals in the lateral direction, A seedling platform 11 inclined rearward and downward so as to reciprocate left and right, and a plurality of floats 13 arranged to slide on the surface of the farm scene 12 between the seedling planting mechanisms 10 are provided. ing.

  As shown in FIG. 4, the transmission case 9 includes a first case 15 having a power input shaft 14 from the engine 6, a pipe-like second case 16 extending laterally from the first case 15, and The third case 17 includes four third cases 17 extending rearward from the second case 16 at an appropriate interval in the lateral direction.

  In the transmission case 9, the first case 15 is provided on the main drive shaft 22 to which power is transmitted from the power input shaft 14 via the bevel gear mechanism 21, while the transmission shaft 20 is provided on the second case. A power transmission mechanism 23 is provided between the main driving shaft 22 and the transmission shaft 20 so that power can be transmitted from the main driving shaft 22 to the transmission shaft 20. Furthermore, a drive shaft 18 is supported horizontally and horizontally at the rear end of each third case 17, and a shaft 19 is provided between the drive shaft 18 and the transmission shaft 20 of the second case. Power can be transmitted to each drive shaft 18.

  The seedling planting mechanism 10 is attached to the left and right ends of the drive shaft 18, and the power input shaft 14 is connected to the first case main shaft 22, the second case transmission shaft 20, and the third case 17 drive shaft 18. Power can be transmitted to the seedling planting mechanism 10. Further, power can be transmitted from the main driving shaft 22 to a seedling table lateral feed mechanism (not shown).

  The traveling transmission 8 in the traveling machine body 2 is provided with a stock shifting mechanism 24 for inputting power branched from the engine 6 and an inconstant speed conversion unit 25 is attached. And the input shaft in the said inconstant speed conversion unit 25 is connected to the output shaft 26 of the said inter-strain transmission mechanism 24, and the power input shaft 14 in the said planting apparatus 5 is connected to the output shaft in this inconstant speed conversion unit 25, It is connected via a power transmission shaft 29 having a universal shaft joint at both ends, and the rotational speed of the drive shaft 18 in each seedling planting mechanism 10 can be appropriately changed by the inter-strain transmission mechanism 24.

  As shown in FIGS. 4 and 5, in each seedling planting mechanism 10, a side view oval type rotary case 30 is detachably fixed to both ends of the drive shaft 18 protruding from the third case 17. The drive shaft 18 is configured to rotate (revolve) counterclockwise as indicated by an arrow B in a side view of the rice transplanter 1. A sun gear 31 is rotatably fitted on the drive shaft 18 in the rotary case 30. The sun gear 31 is locked to the third case 17 through a connecting member 32 so as not to rotate.

  On the outer peripheral portion of the rotating case 30, that is, on both left and right end portions, a pusher operating shaft 33, which will be described later, is pivotally supported in parallel with the drive shaft 18 at positions where the distance from the drive shaft 18 is equal. A hollow planting shaft 34 is rotatably fitted on both operating shafts 33 in the rotating case 30.

  Each end of the planting shaft 34 and the operating shaft 33 protrudes outward from the side surface of the rotating case 30, and each projecting end of each seedling planting shaft 34 is hollow so as to open to the upper surface with a light alloy such as an aluminum alloy. A shaped planting claw case is attached with a bolt 49. A planting claw 36 is fixed to a boss portion 35 a at the tip of each planting claw case 35 in a posture position toward the seedling mount 11. Further, the tip of the operating shaft 33 protrudes into the hollow portion of each planting claw case 35, and a push-out cam 37 is fixed to the protruding portion.

  In addition, a planetary gear 38 having the same number of teeth as the sun gear 31 is fitted on each planting shaft 34, and an intermediate gear that meshes simultaneously with the sun gear 31 and the planetary gear 38 in the rotating case 30. 39 is provided to constitute a gear train mechanism. When the rotating case 30 revolves only once in the counterclockwise direction by the gear train mechanism, each planting claw case 35 is rotated so that each planting shaft 34 rotates only once in the clockwise direction. The planting claw 36 is configured to reciprocate between the seedling stage 11 and the farm scene 12 while maintaining a posture toward the seedling stage 11.

  The sun gear 31, the planetary gear 38, and the intermediate gear 39 that constitute the gear train mechanism are biased as described in, for example, Japanese Patent Publication No. 63-20486 and Japanese Patent Publication No. 63-74413. As shown in FIG. 3, the tip of the planting claw 36 in each planting claw case 35 draws an elliptical closed-loop motion trajectory 40 that is long in the vertical direction. It is configured. The movement locus 40 drawn by the tip of the planting claw 36 becomes a movement locus 40a composed of a curve indicated by a two-dot chain line in FIG.

  The boss portion 35a in each planting claw case 35 is provided with an extrusion shaft 41 constituting an extrusion tool so as to slidably penetrate in an axial direction extending parallel to the longitudinal direction of the planting claw 36, An extruded piece 42 having a U-shaped cross section is fixed to the lower end so as to be close to the rear surface of the planting claw 36. The upper end of the push-out shaft 41 protrudes into the planting claw case 35, and is pivotally attached to the upper end of the push-out shaft 41 by a pin 43 so as to swing in the vertical direction within the planting claw case 35. The pushing lever 44 moves forward in the direction toward the tip of the planting claw 36 by the downward rotation of the pushing lever 44, and the pushing shaft by the upward rotation of the pushing lever 44. 41 is connected via the connection piece 45 so that 41 may move backward from the front-end | tip part of the planting nail | claw 36 to the root part.

  In the planting claw case 35, a spring means 46 for biasing the push lever 44 in the downward direction is provided. The proximal end of the pushing lever 44 is brought into contact with the outer peripheral surface of the pushing operation cam 37 and interlocked with the rotation of the rotating case 30, and the tip of the planting claw 36 in each planting claw case 35. When the rotary case 30 comes to the vicinity of the bottom dead center at the lower limit of the reciprocation as the rotary case 30 rotates, the pushing lever 44 is rotated downward by the pushing force of the spring means 46, and each planting The push-out lever 44 is configured to rotate upward against the spring means 46 when the claw case 35 moves upward from the bottom dead center of the reciprocating motion as the rotary case 30 rotates. Yes.

  Furthermore, the bottom plate of the planting claw case 35 is integrally provided with a boss portion 47 protruding into the planting claw case 35, and a soft elastic body 48 such as rubber can be attached to and detached from the boss portion 47. Is loaded. The push lever 44 contacts the upper surface of the soft elastic body 48 at the end of the downward rotation.

  In this configuration, with the rotation (revolution) of the rotating case 30 in the direction of arrow B, the planting claw centered on the planting shaft 34 in the direction opposite to the arrow B direction by the same rotation angle as the revolution angle of rotation. Since the case 35 rotates, each planting claw case 35 swivels so that the planting claw 36 reciprocates in the vertical direction with the planting claw 36 facing the seedling stage 11. In the middle, when descending from the top to the bottom on the side facing the top surface of the seedling table 11, a single seedling is cut out from the seedling mat on the seedling table 11 with the planting claw 36 at the tip, and this one The tip of the planting claw 36 enters the field scene 12 in the vicinity of the bottom dead center of the lowering lower limit while holding the seedling of the strain.

  At this time, since the pushing lever 44 in the planting claw case 35 rotates downward by the spring force of the spring means 46, the pushing piece 42 slides toward the tip of the planting claw 36. One seedling at the tip of the planting claw 36 is planted in the field scene 12 so as to be pushed out. When the seedling has been rooted in this way, the pushing piece 42 moves backward, and at the same time, the planting claw 36 moves upward so as to come out of the field scene 12.

  Next, in the planting device 5 of the rice transplanter 1 as described above, the planting claws 36 will be described in detail.

  As shown in FIGS. 7 to 16, the planting claw 36 is formed in a “U” shape in a sectional view in which the left and right sides of the plate-like member are bent and the lower part is opened, and an upper plate 51, a side plate 52, And extending in the vertical direction. At the upper part of the planting claw 36, that is, at the base, a mounting hole 51a is provided in the upper plate 51, and as shown in FIG. 6, a bolt 53 is inserted into the mounting hole 51a, and the upper plate 51 and the planting claw case are inserted. The planting claw 36 is configured to be attached to the planting claw case 35 by fastening the boss portion 35a of the 35.

  Here, the mounting hole 51a of the upper plate 51 is a long hole extending in the longitudinal direction (vertical direction) of the planting claw 36, and the upper plate 51 is changed by changing the position where the bolt 53 is inserted into the mounting hole 51a. The mounting position of the planting claw case 35 with respect to the boss portion 35a can be changed. That is, the planting claw 36 is slidably attached to the planting claw case 35 within the width in the longitudinal direction of the mounting hole 51a.

  With this configuration, the planting claw 36 can be slid and attached to an arbitrary position of the planting claw case 35. Therefore, the tip of the planting claw 36 is moved in the longitudinal direction according to the degree of wear. It becomes possible to hold in the optimal position, the same planting claw can be continuously used for a certain period, and the frequency of replacement of the planting claw 36 can be reduced as compared with the conventional one. That is, the durability of the planting claw 36 can be enhanced. Therefore, the use period of the planting claw 36 can be lengthened, and maintenance labor and cost can be reduced.

  A plurality of mounting holes 51 a of the upper plate 51 may be provided side by side in the longitudinal direction of the planting claws 36. In the present embodiment, two mounting holes 51a and 51a are provided side by side on the upper plate 51, and bolts 53 are inserted into the mounting holes 51a so that the upper plate 51 and the boss portion 35a of the planting claw case 35 are located at two locations. The planting claw 36 is configured to be fixed to the planting claw case 35 by fastening. In this way, the planting claw 36 is positioned at an accurate position and can be reliably fixed.

  At the lower portion of the planting claw 36, that is, at the tip portion, an upper plate 51 is formed in a bifurcated shape and branched in parallel to the left and right, and left and right holding portions 55 and 55 are constituted by the upper plate 51 and the side plate 52. . The front end of the side plate 52 in each holding part 55 is inclined in a rearward direction on the front side and inclined in a frontal downward direction on the back side, and has a pointed shape in side view. Further, the tip of the upper plate 51 in the holding part 55 is inclined from the inside to the left and right outside, and has a pointed shape even in plan view, and the holding part 55, that is, the tip of the planting claw 36 is pointed. .

  Further, in the center portion in the longitudinal direction of the planting claw 36, the side plate 52 is formed to have the largest front-rear width in the vicinity of the bifurcated portion 52a of the upper plate 51, thereby ensuring the strength of the planting claw 36. It is illustrated.

  By comprising in this way, it becomes easy to hold | maintain a seedling in the holding | maintenance part 55 * 55, and the retention strength with respect to the seedling of the planting nail | claw 36 can be improved. Further, the number of parts can be reduced as compared with the conventional configuration in which a pair of planting claws is fixed to each planting claw case, and the planting claw 36 can be easily attached to the planting claw case 35. In addition, the cost can be reduced.

  Finally, the pushing tool for pushing out the seedling in the planting claw 36 will be described in detail.

  The pushing tool is constituted by the pushing shaft 41 and the pushing piece 42 fixed to the tip of the pushing shaft 41 as described above, and the axial direction extending in the planting claw case 35 in parallel with the longitudinal direction of the planting claw 36. It is slidably supported on.

  As shown in FIG. 7 and FIG. 17 to FIG. 24, the pushing piece 42 is formed by bending the left and right sides of the plate-like member upward so as to form a “U” shape in cross-section, and from the tip of the pushing shaft 41. It extends in the vertical direction. The base portion 42a of the extruding piece 42 is formed so that its front-rear width (height) is smaller than that of the front end portion 42b so as to be as thin as possible. Etc. are fixed.

  The fixed portion at the front surface of the lower end of the extrusion shaft 41 is cut by the thickness of the extrusion piece 42 so that the inner front surface of the extrusion piece 42 and the front surface of the extrusion shaft 41 are substantially at the same height. Thus, clogging or the like is prevented from occurring on the inner side of the pushing piece 42. Further, the rear surface of the lower end of the push-out shaft 41 is cut obliquely to form an inclined portion, which is formed so as to reduce the weight and to reduce the resistance when entering the water surface or a farm scene.

  The front end portion 42b of the extruded piece 42 has a side in the vertical direction so that the front surface is close to the rear surface of the planting claw 36 and protrudes forward, and the front-rear width is formed larger than the base portion 42a. . Thus, the lower contact surface 42c of the tip 42b is configured to be larger than the base 42a so that the area of the lower surface that contacts when the seedling is cut off together with the tip of the planting claw 36 is increased. Further, the rear surface of the tip 42b of the pushing piece 42 is curved so as to protrude forward, and is a curved surface along the movement locus 40a drawn when the tip of the planting claw 36 shown in FIG. 42d is substantially the same shape so that a large hole is not drilled when the seedling is pushed into the farm scene 12, and the planting posture of the seedling is not disturbed.

  Then, when a single seedling at the tip of the planting claw 36 is planted in the farm scene 12, the push-out shaft so that only the pushing piece 42 of the pushing tool enters the farm scene 12 together with the planting claw 36. A length of 41 is set. Accordingly, the hole formed by the planting claw 36 and the pushing piece 42 entering the farm scene 12 can be made as small as possible, and the contact area between the pushing piece 42 and the seedling at the tip of the planting claw 36 can be reduced. Thus, the seedling can be firmly pushed out and planted by the pushing piece 42.

  Further, the contact surface 42c of the pushing piece 42 is chamfered at the end of the planting claw 36 so that the contact area with the seedling at the tip of the planting claw 36 is further increased and is not damaged. Therefore, when the extruding piece 42 slides in the longitudinal direction toward the tip of the planting claw 36, it is possible to secure as much time as possible for holding the seedling with the planting claw 36, and the extruding piece 42 As well as improving the holding power of the seedling, the holding angle of the seedling can be stabilized.

  At this time, the portion of the contact surface 42c of the pushing piece 42 that is closest to the planting claw 36 is formed to be a substantially vertical surface 42e with respect to the rear surface of the planting claw 36, and the pushing piece 42 and the planting claw 36 are formed. It is comprised so that it may not become a wedge shape. Therefore, it is possible to prevent the seedling from being caught between the pushing piece 42 and the planting claw 36 when the pushing piece 42 slides with respect to the planting claw 36. The seedling at the tip of the nail 36 can be reliably pushed into the farm scene 12.

  Thus, when the planting mechanism cuts out a predetermined amount of seedlings from the seedling mat placed on the seedling mount 11, the pushing tool is in the contracted position, as shown by the two-dot chain line in FIG. 6, and the tip end portion 42 b of the pushing piece 42. Is located inside the side plates 52 and 52 of the planting claw 36. At this time, the branch portion 52a is positioned above the tip end portion 42b, and a space is provided between the branch portions 52a so that no foreign matter is sandwiched therebetween. Then, after the seedling is cut out, the planting claw 36 and the pushing piece 42 hold the root portion of the seedling and convey it to the farm scene 12. When planting into the farm scene 12, the pusher is extended, the tip contact surface 42c and the tip of the planting claw 36 are in substantially the same position, and the tip of the planting claw 36 and the tip of the pushing piece 42 overlap in side view. The part is a V-shaped cutout, and the root part of the seedling is easily opened. In this way, lifting of the seedling after transplanting is prevented.

The side view of a riding type rice transplanter. The top view of a riding type rice transplanter. The principal part expansion side view of the planting apparatus in FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. FIG. 5 is an enlarged sectional view taken along line VV in FIG. 3. FIG. 6 is an enlarged sectional view taken along line VI-VI in FIG. 5. The perspective view of a planting nail | claw case and a planting claw. The perspective view of a planting nail. The front view of a planting nail. The rear view of a planting nail. The left view of a planting nail. The right view of a planting nail. The top view of a planting nail. The bottom view of a planting nail. VII-VII sectional view taken on the line of FIG. VIII-VIII sectional view of FIG. The perspective view of an extrusion tool. The front view of an extrusion tool. The rear view of an extrusion tool. The left view of an extrusion tool. The right view of an extrusion tool. The top view of an extrusion tool. The bottom view of an extrusion tool. IX-IX sectional view of FIG.

DESCRIPTION OF SYMBOLS 1 Rice transplanter 5 Planting apparatus 10 Rotary seedling planting mechanism 30 Rotating case 35 Planting claw case 36 Planting claw 40 Movement locus 41 Extrusion shaft 42 Extruded piece 42a Base 42b Tip

Claims (1)

In the planting device of the rice transplanter (1) provided with the rotary seedling planting mechanism (10) in which the planting claw (36) is attached to the planting claw case (35), the planting claw (36) has a bifurcated configuration. An extruding tool is disposed so as to be movable between the holding portions (55 and 55), and the extruding tool includes an extruding shaft (41) and an extruding piece (fixed to the tip end side of the extruding shaft (41)). 42), the extruding piece (42) is formed in a U-shaped sectional view by bending the left and right sides of the plate-like member upward, and extends from the tip of the extruding shaft (41). The distal end of the extruded shaft (41) and the fixed portion of the base portion (42a) of the extruded piece (42) are shaved by the thickness of the extruded piece (42), and the base portion (42a) of the extruded piece (42) is removed. The inner front surface and the front surface of the tip of the extrusion shaft (41) are substantially the same height. And secure it urchin formed, tip portions of the extruded piece (42) (42b) is configured to protrude forward with a vertical side so as to approach the surface of the nail with the plant (36), said A movement trajectory (40a) formed by the tip of the planting claw (36) which is formed wider than the base (42a) and has a side opposite to the planting claw (36) of the tip (42b). The planting claw (36) has a large hole when the seedling is pushed out when the tip of the planting claw (36) enters the field scene (12). The end of the extruding piece (42) on the side of the planting claw (36) is chamfered as viewed from the side, and the contact surface ( configured to 42c), a structure in which the contact area with the seedlings at the tip of the nail with the plant (36) is not increased, Of the contact surfaces (42c), part of the most planting claw (36) side, substantially vertical surface to the rear surface of the pawl with the plant (36) formed to have a (42e), said extruded strip (42) A planting device of a rice transplanter, characterized in that it does not have a wedge shape between the planting nail (36) and the planting claw (36) .

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