JP6103109B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a seedling planting apparatus provided in a seedling transplanting machine such as a rice transplanter.

  As a seedling planting device for taking seedlings from a seedling mat mounted on a seedling platform on the rear side of a seedling transplanting machine and planting the seedlings on a farm field, mechanisms disclosed in Patent Document 1 and Patent Document 2 are known. This seedling planting device is provided with left and right rotary cases that rotate about a planting drive shaft in the left-right direction, and a seedling planting tool having seedling picking nails and seedling extrudates at both ends of the rotary case. Deploy. During the rotation of the rotary case, the tip of the seedling planting tool is projected to the rotating outer periphery of the rotary case, and the seedling separation and planting operations are performed by drawing a substantially elliptical planting locus line.

JP 2007-089515 A JP 2001-299029 A

  In the seedling planting device having the above configuration, when the planting interval in the front-rear direction of the seedling, that is, between the stocks is widely changed (particularly 37-42 stocks), or when the rotation of the planting drive shaft is increased by increasing the traveling speed, There is a problem that the number of rotations of the rotary case increases and decreases and resonates with vibration caused by gear meshing. Due to this resonance, the vibration amplitude of the seedling planting device portion becomes large, and there is a problem that the seedling planting tool cannot take seedlings, resulting in a lack of stock, or inability to plant seedlings at an appropriate planting position.

  Conventionally, in order to solve these problems, the eccentric sun gear, the eccentric counter gear and the eccentric planetary gear are changed with respect to the change between stocks and the traveling speed, the meshing period is changed, and the stock speed is increased. The configuration is such that resonance does not occur even when the speed is increased.

  However, depending on the combination of eccentric gears, the locus of the planting tip changes, so that the planting depth of the seedlings tends to become shallow, and the seedlings that should have been planted disappear due to wind and water flow and become a missing strain Also occurred.

  Therefore, it is a problem to be solved by the present invention to provide a seedling planting apparatus that can suppress the vibration amplitude due to the meshing of gears.

  The present invention has taken the following technical means to solve the above problems.

That is, the invention described in claim 1 is a seedling in which a rotation case (31) is provided on the planting rotation shaft (30) in the left-right direction and a pair of planting ridges (27, 27) is provided on the rotation case (31). In the planting device, the rotary case (31) is provided with an eccentric input gear (40) that is freely rotatable with respect to the planting rotary shaft (30), and the pair of planting rods (27, 27) are provided. A pair of pivot shafts (34, 34) for pivoting are provided, and an eccentric output gear (42, 42) is provided on each of the pair of pivot shafts (34, 34), and the eccentric input gear (40) The pair of eccentric output gears (42, 42) are provided with a pair of relay gears (41, 41) for transmitting a driving force, and the center of rotation of each of the pair of relay gears (41, 41) is the eccentric input gear. (40) rotation center and each of the pair of eccentric output gears (42, 42). Together we are positioned other than a line connecting the, each of the rotation center of the pair of relay gears (41, 41), while disposed in a position which is a point symmetry to the center of rotation as the point of symmetry of the eccentric input gear (40) The pair of angle adjustment members (50, 50) for adjusting the rotation angle of the pair of implantation baskets (27, 27) are provided between the pair of implantation baskets (27, 27) and the rotating case (31). It is the seedling planting apparatus characterized by each providing in .

  In the invention according to claim 2, the eccentric input gear (40), the pair of relay gears (41, 41), and the pair of eccentric output gears (42, 42) are linearly seen in a front view or a plan view. The right and left lengths of the pair of relay rotation shafts (44, 44) that are the rotation centers of the pair of relay gears (41, 41) are set to the planting rotation shaft (30) and the pair of rotation gears. The seedling planting apparatus according to claim 1, wherein the rotation axis (34, 34) is shorter than the left and right lengths.

  The invention according to claim 3 is provided with a planting member (36, 36) for holding a seedling in each of the pair of planting ridges (27, 27), and the pair of planting members (36, 36). The distance (L) from each tip to the axis of each of the pair of rotating shafts (34, 34) is the same as the distance (φ) between the axes of the pair of rotating shafts (34, 34). The seedling planting apparatus according to claim 1, wherein the seedling planting apparatus is a seedling planting apparatus.

  According to a fourth aspect of the present invention, a seedling extrudate (29) for extruding a seedling held by the planting member (36) is provided on the planting ridge (27), and the seedling extrudate (29) is slid. And a push spring (76) for urging the actuating arm (74) in the pushing direction. The actuating arm (74) is provided with respect to the rotation locus of the rotating case (31). 4. The seedling planting apparatus according to claim 3, wherein a parallel arm portion (74 a) that is parallel to each other is formed and the arm portion (74 a) is pressed by the push spring (76). .

  According to the fifth aspect of the present invention, the operating arm (74) rotated to the pushing position between the arm shaft (73) which is a turning fulcrum of the operating arm (74) and the seedling extrudate (29). ) Is provided, and the contact portion between the operating arm (74) and the seedling extrudate (29) is projected forward of the protective member (77). It is a seedling planting apparatus as described in.

  According to the first aspect of the present invention, the rotation centers of the pair of relay gears (41, 41) are the rotation centers of the eccentric input gear (40) and the pair of eccentric output gears (42, 42). By not being located on the line connecting the centers, the distance between the rotation center of the eccentric input gear (40) and the rotation center of each of the pair of eccentric output gears (42, 42) can be shortened. ).

  Then, the rotational centers of the pair of relay gears (41, 41) that transmit the driving force to the pair of implantation cages (27, 27) are point-symmetric with respect to the rotational center of the eccentric input gear (40). Since the weight balance of the rotating case (31) can be stabilized, the occurrence of vibration of the rotating case (31) can be suppressed.

Moreover, by arranging the angle adjusting member (50) between the planting ridge (27) and the rotating case (31), the lateral width of the seedling planting device is suppressed, and a compact configuration is obtained.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the eccentric input gear (40), the pair of relay gears (41, 41), and the pair of eccentric output gears (42, 42). Is arranged linearly in a plan view or a front view, the left-right width of the rotating case (31) can be made compact.

  In addition, the left and right lengths of the pair of relay rotating shafts (44, 44) are shorter than the left and right lengths of the planting rotating shaft (30) and the pair of rotating shafts (34, 34), so (27, 27) can be prevented from interfering with each of the relay rotation shafts (44, 44) when each of them rotates, so that the rotation trajectory of the pair of implantation baskets (27, 27) is prevented from being disturbed, Improves seedling planting accuracy.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, between the shaft centers of the respective rotation shafts (34, 34) of the pair of implantation rods (27, 27). By making the distance (φ) and the distance (L) from the axis of each of the pair of rotating shafts (34, 34) to the tip of each of the pair of planting members (36) the same, Since the attachment member (36) can be configured not to interfere with the other planting ridge (27), the planting position and planting depth of the seedling can be prevented from being disturbed, and the planting accuracy of the seedling is improved. .

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 3, the pushing spring (76) presses the parallel arm portion (74a) of the operating arm (74), thereby 74) can be prevented from being disturbed, the pushing member (37) can reliably push out the seedling and plant it in the field, and the planting accuracy of the seedling is improved.

  According to the invention described in claim 5, in addition to the effect of the invention described in claim 4, the protective member (77) for receiving the operating arm (74) between the seedling extrudate (29) and the arm shaft (73). Since the contact area between the operating arm (74) and the protective member (77) can be increased, the seedling extrudate (29) can be reliably pushed by the operating arm (74), and The planting basket (27) can be made compact.

It is a side view of a seedling transplanter provided with a seedling planting device according to the first embodiment of the present invention. It is a top view of the seedling transplanting machine of FIG. It is a partial cross section figure from the left direction of the seedling planting apparatus concerning 1st embodiment of this invention. It is a partial cross section figure from the rear direction of the seedling planting apparatus of FIG. It is sectional drawing from the left direction of the rotation case which comprises the seedling planting apparatus of FIG. It is a figure which shows the planting member front-end | tip locus | trajectory which the front-end | tip of the planting member corresponding to the position of the rotating shaft of the seedling planting apparatus of FIG. It is a figure which shows the positional relationship of each eccentric gear when the front-end | tip of a planting member comes to the lowest point of the seedling planting apparatus of FIG. It is a figure which shows the positional relationship of the position of the axial center of a planting rotation axis | shaft of the seedling planting apparatus of FIG. The figure which shows the positional relationship of the position of the shaft center of an eccentric input gear, and each planting rod when the front-end | tip of a planting member of the seedling planting apparatus of FIG. 3 passes on the same horizontal surface as a planting rotation axis. It is. It is the figure which showed the static locus | trajectory and moving locus | trajectory of the front-end | tip of the planting member of the seedling planting apparatus of FIG. It is a figure which shows the movement locus | trajectory of the front-end | tip of a planting member when changing between seedling stocks of the seedling planting apparatus of FIG. It is a side view from the left direction of the seedling planting apparatus when the seedling planting apparatus of FIG. 3 stops. It is sectional drawing of the planting ridge of the seedling planting apparatus of FIG. 3, and S1-S1 sectional drawing. It is a side view from the left direction of a braking cam of the seedling planting apparatus concerning 2nd embodiment of this invention. It is sectional drawing of the planting rotation axis periphery of the seedling planting apparatus of FIG. FIG. 2 is a plan sectional view around the planting clutch of the mission case of the seedling transplanter of FIG. It is a top view of the mission case periphery of the seedling transplanter of FIG.

  Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings. The forward and backward directions and the left and right directions are based on the forward direction of the seedling transplanter. 1 and 2 show a right side view and a plan view of a riding type rice transplanter equipped with a seedling planting apparatus according to a first embodiment of the present invention.

  This riding type rice transplanter is equipped with an engine 11 and is planted with six-row seedlings via a lifting link device 14 behind a traveling vehicle body 10 having a pair of left and right front wheels 12 and rear wheels 13 that are driven and rotated. The part 15 is connected.

  Further, the traveling vehicle body 10 is provided with a driver seat 16, a steering handle 17 that steers the front wheels 12, and a spare seedling table 18 on which spare seedlings are placed.

  The seedling planting section 15 has a planting transmission base 22 inclined to the upper side of the planting transmission case 21 to which power is input from the machine body and arranged at the rear of the traveling vehicle body 10 and has a planting transmission. One set of seedling planting devices 23 is provided for every two strips at the rear end of the planting transmission portion of the case 21.

  When the traveling vehicle body 10 is advanced with the center float 24 and the side float 26 in contact with the ground, the seedling stage 22 reciprocates left and right and the mat seedling on the stage is provided on the lower end side of the seedling stage 22. One stock is sequentially supplied to 20 seedling collection ports 25, and the seedling planting device 23 separates them and takes them out and plant them in the field.

  Next, the configuration of the seedling planting device 23 according to the first embodiment will be described. FIG. 3 shows a partial cross-sectional view of the seedling planting device 23 according to the first embodiment of the present invention as viewed from the left side of the traveling vehicle body 10, and FIG. 4 shows a partial cross-sectional view from the rear direction.

  The seedling planting device 23 includes a planting rotary shaft 30 that is rotatably supported at the rear end of the planting transmission case 21 and extends in the left-right direction, and a rotary case that rotates about the planting rotary shaft 30. 31 and two planting rods 27 and 27 for taking seedlings from the seedling stage 22 and planting them on the farm field at both ends of the rotating case 31.

  The center part of the rotating case 31 is fixed and attached to the left and right projecting parts of the planting rotary shaft 30 so as to rotate integrally. Further, the rotary shaft 34 is rotatably supported by both ends of the rotary case 31 by the first bearing 32 and the second bearing 33, and the implantation rod 27 is implanted on each of the two rotary shafts 34. The accessory case 35 is fixedly attached.

  The planting case 35 is provided with a fork-shaped planting member 36 having two rods and a seedling extrudate 29 having a push-out member 37 fixed to the tip.

  In FIG. 15, sectional drawing of the planting rotating shaft 30 periphery of the seedling planting apparatus 23 of FIG. 3 is shown. As shown in FIGS. 3, 4, and 15, the planting rotary shaft 30 is formed with an angular surface 30 a, and is inserted into the boss portion 38 of the rotary case 31 so as to be orthogonal to the planting rotary shaft 30. The rotating fixing member 39 is fixed to the planting rotating shaft 30 by bringing the tapered fixing member 39 into contact with the angular shaft surface 30 a. Further, the planting rotary shaft 30 is provided with an inclined portion 30b extending from the outer periphery of the shaft to the angular axis surface 30a, and a part of the fixing member 39 is positioned so as to overlap in the radial direction of the inclined portion 30b.

  By positioning a part of the fixing member 39 in the radial direction of the inclined portion 30b, the lateral width of the boss 38 can be reduced. Thereby, while the interference with the rotating planting stick 27 and the said boss | hub 38 is prevented, the left-right direction of the seedling planting apparatus 23 can be made compact.

  FIG. 5 shows the internal structure of the rotating case 31 of the present embodiment. An eccentric input gear 40 that is fitted to the outer peripheral portion of the planting rotary shaft 30 and is integral with the planting transmission case 21 and is non-rotating is disposed inside the rotary case 31, and meshes with the eccentric input gear 40. A gear mechanism including two relay gears 41 and 41 and two eccentric output gears 42 and 42 meshing with the relay gears 41 and 41 is housed.

  The center of rotation of the eccentric input gear 40 is the same as the axis of the planting rotary shaft 30, that is, the eccentric input gear 40 is arranged so as to be coaxial with the planting rotary shaft 30. The rotating case 31 is supported by the bearing 43. The relay gear 41 transmits the driving force from the eccentric input gear 40 to the eccentric output gear 42, and is attached to the counter gear shaft 44 and is configured to rotate freely corresponding to the rotating case 31. Further, the eccentric output gear 42 is attached so as to rotate integrally with a rotation shaft 34 that rotates the implantation rod 27.

  In the seedling planting device 23 according to the first embodiment of the present invention, the rotation center of the relay gear 41 is not on the line connecting the rotation center of the eccentric input gear 40 and the rotation center of the eccentric output gear 42 in a side view. The configuration is to be positioned. Furthermore, an isosceles triangle is formed by connecting the rotation center of the eccentric input gear 40, the rotation center of the relay gear 41, and the rotation center of the eccentric output gear 42. Further, the relay gears 41 and 41 and the eccentric output gears 42 and 42 are arranged point-symmetrically with the rotation center of the eccentric input gear 40 as a symmetric point, whereby the rotation center of the eccentric input gear 40 and the relay gear 41 are arranged. , 41 and the rotation centers 42, 42 of the eccentric output gear are arranged so as to draw an “S” shape in a side view.

  By arranging the eccentric output gears 42 and 42 as point-symmetric, in the present embodiment, the rotation center of the relay gears 41 and 41 is a line connecting the eccentric input gear 40 and the eccentric output gears 42 and 42. Both are located on the upper rotation side. However, there is no problem even if this is a structure located on the lower rotation side.

  By positioning the rotation center of the relay gear 41 in a side view other than on the line connecting the rotation center of the eccentric input gear 40 and the rotation center of the eccentric output gear 42, the rotation center and the eccentricity of the eccentric input gear 40 are offset. The distance from the rotation center of the output gear 42 can be shortened. Thereby, since the rotation case 31 can be made compact and the natural frequency can be increased, the vibration amplitude can be reduced. Further, the distance between the rotation centers of the eccentric input gear 40 and the relay gear 41 can be arbitrarily set, and the number of teeth of each gear can be changed. Therefore, the number of teeth can be designed avoiding resonance, and vibration due to resonance can be suppressed. it can.

  At the end of the rotating case 31, there are two implantation rods 27, 27, and the rotation center of the relay gears 41, 41 that transmits the driving force to these implantation rods 27, 27 is the rotation center of the eccentric input gear 40. By arranging them as symmetrical points, the weight balance of the heavy rotating case 31 can be stabilized and vibrations can be suppressed.

  When the planting rotary shaft 30 is driven to rotate, the rotary case 31 rotates in a certain direction, the eccentric output gear 42 revolves around the eccentric input gear 40, and the revolution direction while the eccentric input gear 40 revolves once. The eccentric output gear 42 rotates once in the opposite direction. 3 and 5, the rotating case 31 rotates counterclockwise on the drawing together with the planting rotary shaft 30, and the eccentric output gear 42 revolves counterclockwise around the planting rotary shaft 30. And rotate in a clockwise direction.

  Since the planting rod 27 rotates together with the rotation shaft 34 attached to the eccentric output gear 42, the distal end of the planting member 36 of the planting rod 27 as the planting rotation shaft 30 rotates. Moves in a configuration in which a tip locus 19 of a seedling planting tool to be described later is drawn. While the eccentric output gear 42 revolves once, the tip of the planting member 36 goes around the seedling planting tool tip locus 19. The seedling planting tool tip locus 19 is a static locus viewed from the left side when the traveling vehicle body 10 is stopped.

  As shown in FIG. 4, the eccentric input gear 40, the relay gear 41, and the eccentric output gear 42 constitute a gear mechanism that is linearly arranged in a plan view. “Linearly arranged” means a state in which the gears have the same tooth width and the gears do not protrude in the axial direction. The left and right length of the relay rotation shaft 44 fitted to the relay gear 41 is shorter than the left and right length of the planting rotation shaft 30 coaxial with the eccentric input gear 40 and the rotation shaft 34 fitted to the eccentric output gear 42. Make it shorter than the left and right length of.

  By arranging the eccentric input gear 40, the relay gear 41, and the eccentric output gear 42 in a straight line in a plan view, it is not necessary to widen the left and right width of the rotating case 31, and the rotating case 31 is configured to be compact. Can do.

  Further, the left and right lengths of the relay rotation shaft 44 fitted to the relay gear 41 are shorter than the left and right lengths of the planting rotation shaft 30 fitted to the eccentric input gear 40 and the rotation fitted to the eccentric output gear 42. By making it shorter than the left and right length of the moving shaft 34, it is possible to prevent the planting rod 27 from interfering with the relay rotating shaft 44 when it is rotated, and the planting rotation locus of the planting rod 27 is not disturbed. Improves seedling planting accuracy.

  As shown in FIG. 5, in the rotating case 31, there are provided a braking cam 47 attached in a configuration that rotates integrally with the rotating shaft 34, a braking arm 48 that contacts the outer peripheral surface of the braking cam 47, and a braking arm 48. A phase shift prevention mechanism including a brake spring 49 pressed against the brake cam 47 is provided.

  The braking cam 47 has a shape as shown in FIG. 5 and brakes the rotation of the eccentric output gear 42 when the planting rod 27 is in a position for taking a seedling from the seedling collection port 25 and a position for planting the seedling in the field. The vibration due to the backlash between the gears is suppressed, and the seedling separation and seedling planting operations are performed accurately.

  FIG. 14 shows a side view of the seedling planting device 23 according to the second embodiment of the present invention from the left side of the braking cam 47. In the seedling planting device 23 according to the second embodiment, the entire circumference of the braking cam 47 is formed by the first contact portion 47a and the second contact portion 47b. The first contact portion 47a extends from the outer peripheral position in contact with the braking arm 48 to the 135 ° rotation range on the upper side in the rotational direction from the outer peripheral position when the planting basket 27 is in a position to take the seedling. It refers to the outer peripheral position in contact, and the second contact portion 47b refers to the other portion. The first contact portion 47a is configured such that the distance between the outer periphery of the braking cam 47 and the rotation center is increased stepwise toward the lower side in the rotation direction.

  The first contact portion 47a of the braking cam 47 is provided with a force that reduces vibration by increasing the distance between the outer periphery of the first contact portion 47a and the rotation center in a stepwise manner until the planting rod 27 takes a seedling. While gradually strengthening, the force to suppress vibration at the part where the seedling is taken can be strengthened most. As a result, vibration due to sudden force fluctuations can be suppressed, seedlings can be reliably acquired, and seedling planting accuracy is improved.

  The extruding member 37 of the planting rod 27 is attached to the tip of the seedling extrudate 29 that is slidably supported by the planting case 35 so as to be close to the back surface of the planting member 36. It is configured to project to the distal end side of the planting member 36 and to recede to the root side of the planting member 36 by operation. By the operating mechanism of the pushing member 37 accommodated in the planting tool case 35, the pushing member 37 protrudes when the tip of the planting member 36 moves to the lower part of the seedling planting tool tip locus 19, The seedling held by the planting member 36 is pushed out to the field. The operation mechanism of the pushing member 37 will be described later. The seedling planting device 23 according to the present embodiment is configured as described above, and operates as follows during planting work. When the planting rotary shaft 30 is driven and rotated, the pair of planting rods 27 attached to the rotary case 31 are arranged so that the tip of the planting member 36 is 1 on the same track in which the seedling planter tip locus 19 is drawn. / Moves in a fixed posture while maintaining an interval of 2 cycles.

  When the planting member 36 of the planting basket 27 passes through the seedling outlet 25, the seedling on the seedling stage 22 is separated and taken out. At this time, the pushing member 37 is in a retracted state. When the planting rod 27 moves downward and the tip of the planting member 36 moves to the lower part of the seedling planting tool tip locus 19, the pushing member 37 provided at the tip of the seedling pushing body 29 protrudes, and the planting member 36 holds. The seedling is pushed down from the planting member 36 and is planted in the field by pushing down the soil portion of the seedling. Thereafter, the implantation rod 27 moves upward through a track behind the lower movement, and the pushing member 37 moves backward.

  FIG. 6 is a diagram showing the seedling planting tool tip locus 19 drawn by the tip of the planting member 36 corresponding to the position of the rotation shaft 34 of the seedling planting device 23 according to the first embodiment of the present invention. FIG. 6 is a schematic diagram viewed from the left side of the traveling vehicle body 10.

  A revolution locus 51 shown in FIG. 6 indicates a revolution locus of the rotation shaft 34 when the planting rotation shaft 30 rotates. Moreover, in FIG. 6, the eccentric input gear 40, the relay gear 41, and the eccentric output gear 42 have shown the position of each gear when the rotating shaft 34 exists in the lowest point. Further, the tip locus 9 of the conventional seedling planting tool is indicated by a one-dot chain line.

  The seedling planting apparatus 23 according to the first embodiment has the configuration of the eccentric input gear 40, the relay gears 41 and 41, and the eccentric output gears 42 and 42 shown in FIG. A seedling planting tool tip locus 19 different from the tool tip locus 9 is drawn. While the rotation shaft 34 goes around the revolution trajectory 51, the tip of the planting member 36 moves around the seedling planting tool tip trajectory 19.

  The details of the seedling planting tool tip locus 19 in the seedling planting device 23 of the first embodiment will be described below.

  FIG. 7 is a diagram showing the positional relationship of the gears in the rotating case 31 when the tip of the planting member 36 of the planting basket 27 comes to the lowest point on the seedling planting tool tip locus 19. FIG. 7 is a view as seen from the left side of the traveling vehicle body 10. In the drawings after FIG. 7, the front-rear direction of the traveling vehicle body 10 is described as the x direction and the vertical direction is described as the y direction.

  Further, in the drawings after FIG. 7, as shown in the upper right diagram of FIG. 7, the shape and posture of the implantation rod 27 are set with the tip of the implantation member 36 of the implantation rod 27 and the center of the rotation shaft 34 as the vertex. Is represented by a triangle.

  In FIG. 7, the position of the planting rod 27 when the tip of the planting member 36 reaches the seedling collection opening 25 and when the tip of the seedling planting tool tip locus 19 is reached is described.

  In the first embodiment, the length L from the rotation shaft 34 to the tip of the planting member 36 is set from the planting rotation shaft 30 to the rotation shaft 34 which is the center of the revolution locus 51 of the planting rotation shaft 30. The length is twice the length, that is, the same length as the diameter φ of the revolution locus 51 of the planting rotation shaft 30. For example, the length L is set to about 160 mm which is the same as the diameter φ of the revolution locus 51 of the conventional planting rotation shaft 30.

  From the center axis distance φ between the rotation shafts 34 of the two implantation baskets 27, 27 and the axis of the rotation shaft 34 of the implantation basket 27 provided at the end of the rotary case 31, Since the distance L to the tip of the planting member 36 provided in the bush 27 is the same, the planting member 36 can be configured not to interfere with the other planting basket 27. Thereby, it can prevent that the planting position and planting depth of a seedling are disturbed, and the seedling planting accuracy is improved.

  Furthermore, the distance b2 in the y direction from the position of the lowest point (point B) on the seedling planting tool tip locus 19 to the planting rotation shaft 30 that is the center of the revolution locus 51 of the planting rotation shaft 30 is: It is set as the structure which becomes substantially the same length as the diameter (phi) of the revolution locus | trajectory 51 of a planting rotation axis.

  Further, as shown in FIG. 7, when the straight line connecting the planting rotary shaft 30 that is the axis of the eccentric input gear 40 and the rotary shaft 34 that is the axis of the eccentric output gear 42 is the first straight line, The counter gear shaft 44, which is the axis of the relay gear 41, is positioned in front of the first straight line with reference to the rotational direction in which the shaft 34 revolves (counterclockwise in FIG. 7).

  When the straight line connecting the planting rotary shaft 30 that is the axis of the eccentric input gear 40 and the counter gear shaft 44 that is the axis of the relay gear 41 is a second straight line, the first straight line and the second straight line The angle θ2 formed by the straight line is 18 ± 2 °.

  In the present embodiment, as shown in FIG. 7, when the rotation shaft 34 comes to the lowest point of the revolution locus 51, the tip of the planting member 36 is the lowest point of the seedling planter tip locus 19. It is set as the structure which reaches B point which is.

  Then, if the straight line connecting the rotation shaft 34 that is the axis of the eccentric output gear 42 and the tip of the planting member 36 is a third straight line, the tip of the planting member 36 is on the seedling planter tip locus 19. The angle θ1 formed by the first straight line and the third straight line when reaching the lowest point (point B) is 122 ± 2 °.

  FIG. 8 is a diagram showing a positional relationship between the position of the axis of the planting rotation shaft 30 and each passing point on the seedling planting tool tip locus 19 of the seedling planting device 23 according to the first embodiment.

  As shown in FIG. 8, the seedling planting tool tip locus 19 through which the tip of the planting member 36 passes is a locus that draws a closed curve in a side view, and the position that is the highest position of the seedling planting device tip locus 19 is point A. The lowest position is B point, and the foremost position is C point.

  As shown in FIG. 8, the tip of the planting member 36 passes through the foremost point (point C) at a position lower than the planting rotation shaft 30.

  The distance in the x direction between the point A and the planting rotary shaft 30 that is the axis of the eccentric input gear 40 is a1, and the distance in the y direction is a2. Further, the distance in the x direction between the point B and the planting rotary shaft 30 is b1, and the distance in the y direction is b2. Further, the distance in the x direction between the point C and the planting rotary shaft 30 is c1, and the distance in the y direction is c2.

  In the present embodiment, the length of a1 is configured to be not less than 0.65 times and not more than 0.69 times the length φ that is twice the length from the planting rotation shaft 30 to the rotation shaft 34, The length of a2 is configured to be 0.91 to 0.95 times the length φ.

  Further, the length of b1 is configured to be 0.87 times or more and 0.91 times or less of the length φ, and the length of b2 is 0.95 times or more and 1.1 times or less of the length φ. It becomes the composition which becomes.

  Further, the length of c1 is configured to be 1.4 times or more and 1.5 times or less of the length φ, and the length of c2 is 0.12 times or more and 0.16 times or less of the length φ. It becomes the composition which becomes.

  Assuming that the position of the horizontal plane 30 mm vertically above the lowest point (point B) on the seedling plant tip locus 19 is the position of the field scene, two points where this horizontal plane intersects with the seedling plant tip locus 19 Of these, the intersection on the front side is D1 and the intersection on the rear side is D2.

  In this embodiment, when the distance in the x direction between point D1 and point B is d1, and the distance in the x direction between point D2 and point B is d2, the length of d1 is the length of d2. The configuration is approximately twice as long.

  Further, the shape of the locus from the point C to the point B in the seedling plant tip locus 19 is an arc of a perfect circle having a radius of 0.85 times or more and 0.9 times or less of the length φ in a side view. It is set as the structure which substantially corresponds to the shape of.

  FIG. 9 shows the seedling planting device 23 according to the first embodiment of the present invention, when the tip of the planting member 36 of one planting basket 27 passes on the same horizontal plane as the planting rotation shaft 30. It is a figure which shows the positional relationship of the position of the axial center of the eccentric input gear 40, and each implantation rod 27. FIG.

  The two implantation rods 27 are fixed to each of the two rotation shafts 34 disposed at both ends of the rotation case 31 that is point-symmetric about the planting rotation shaft 30.

  As shown in FIG. 9, in this embodiment, when the tip of the planting member 36 of one planting basket 27 passes on the same horizontal plane as the planting rotation shaft 30, the planting of the other planting basket 27 is performed. The tip of the attaching member 36 also passes on the same horizontal plane as the planting rotary shaft 30 in the upside down direction.

  Of the two points where the same horizontal plane as the planting rotation axis 30 and the seedling plant tip locus 19 intersect, if the intersection on the front side is E1 point and the intersection on the rear side is E2 point, one planting rod When the tip of 27 planting members 36 passes through point E1 while descending, the tip of the planting member 36 of the other planting basket 27 passes through point E2 while rising.

  In this embodiment, when the distance in the x direction between the point E1 and the lowermost point B is e1, and the distance in the x direction between the point E2 and the planting rotary shaft 30 is e2, The length is substantially equal to the length of e2.

  FIG. 10 shows implantation of the seedling planting device 23 according to the first embodiment when the traveling vehicle body 10 is traveling in correspondence with the seedling planting tool tip locus 19 when the traveling vehicle body 10 is stopped. It is the figure which showed the movement locus | trajectory which the front-end | tip of the planting member 36 of the collar 27 draws.

  When the traveling vehicle body 10 travels to the left while the tip of the planting member 36 of the planting basket 27 draws the seedling planting tool tip locus 19, the tip of the planting member 36 of the planting basket 27 is the seedling in side view. A planting tool tip movement locus 52 is drawn.

  As shown in FIG. 10, the position of the lowest point on the revolution trajectory 51 of the planting rotation axis about the planting rotation axis 30 is set to 0 °, and the rotation axis 34 is the rearmost on the revolution trajectory 51. The position when it comes to the side is defined as a 90 ° position, and the position when the rotation shaft 34 reaches the uppermost point on the revolution locus 51 is defined as a 180 ° position.

  The point F on the seedling planting tool tip locus 19 in FIG. 10 is when the rotation shaft 34 is at a position of 260 ° when the position on the revolution locus 51 of the rotation shaft 34 is defined as described above. The position of the tip of the planting member 36 of the planting basket 27 is shown. Further, the point F ′ on the seedling planting tool tip movement locus 52 indicates the position of the tip of the planting member 36 of the implantation rod 27 on the movement locus corresponding to the point F.

  The point G on the seedling planting tool tip locus 19 indicates the position of the tip of the planting member 36 of the planting rod 27 when the rotation shaft 34 is at a 90 ° position on the revolution locus 51. The G ′ point on the seedling planting tool tip movement locus 52 indicates the position of the tip of the planting member 36 of the implantation rod 27 on the movement locus corresponding to the point G.

  In the present embodiment, with the configuration of each gear shown in FIG. 5, the moving speed of the tip of the planting member 36 is accelerated from the vicinity of the 260 ° position on the revolution trajectory 51 of the rotation shaft 34, and the 90 ° position. From the vicinity, the moving speed of the tip of the planting member 36 decreases.

  That is, on the seedling planting tool tip locus 19, the tip of the planting member 36 moves quickly while moving the seedling from the F point to plant the seedling in the field to the G point, and from the G point to take out the seedling from the seedling outlet 25. Move slowly while moving to a point. On the seedling planting tool tip movement locus 52, the tip of the planting member 36 accelerates from the point F ′ to plant the seedling in the field, and the tip of the planting member 36 decelerates from the point G ′ to seed the seedling from the seedling outlet 25. Take out.

  By controlling the moving speed of the tip of the planting member 36 as described above, the tip of the planting member 36 can be rapidly raised after planting the seedling without interfering with the seedling planted in the field.

  FIG. 11 shows the movement trajectory of the tip of the planting member 36 of the planting rod 27 when the planting interval in the front-rear direction of the seedling, that is, between the plants, is changed in the seedling planting device 23 according to the first embodiment. Show.

  FIG. 11 shows the trajectory of each planted strain (37, 42, 50, 60, 70, 80, 90). In FIG. 11, a position 30 mm vertically above the position of the lowest point of the locus of the tip of the planting member 36 is assumed to be a farm field.

  In the locus of the tip of the seedling picking nail drawn by the conventional seedling planting device, if the configuration is such that vibration does not easily occur on the sparse planting side, the planting interval between the seedlings becomes more disturbed as the number of strains increases on the dense planting side There was a problem, and when the planting interval between the seedlings was constant on the dense planting side, there was a problem that vibration was likely to occur when the planting side was sparse. The seedling planting device 23 of the present embodiment operates in a configuration in which the seedling planting tool tip locus 19 is drawn while the traveling vehicle body 10 is stopped, thereby disturbing the planting interval between the seedlings and It is possible to cope with a wide range of planting strains from 37 strains to 90 strains without planting seedlings temporarily due to the occurrence.

  In the seedling planting apparatus 23 according to the first embodiment, since it is not necessary to change gears corresponding to the number of planted stocks, work adaptability is improved at low cost. Moreover, since the seedling planting apparatus 23 can be comprised by the substantially same magnitude | size as the past, size reduction is achieved.

  In FIG. 12, the side view of the seedling planting apparatus 23 when the seedling planting apparatus 23 of this Embodiment stops is shown. When the seedling planting device 23 is stopped, that is, when the planting clutch is set to “OFF”, the two planting rods 27 attached to both ends of the rotating case 31 are stopped in the posture shown in FIG. To do.

  As shown in FIG. 12, when the seedling planting device 23 stops by stopping the planting members 36 of the two planting rods 27 in parallel with each other, the area that protrudes forward and backward from the rotating case 31 in a side view. Is small and not bulky. This facilitates the storage of the seedling transplanter in a warehouse or the like, or the loading of a light truck on the loading platform.

  In addition, since the planting members 36 and 36 can be prevented from stopping in a state where they have entered each other in the soil of the field, the planting members 36 and 36 are clogged with mud, and the seedlings are not scraped off from the seedling planting unit 15. Occurrence of places where seedlings cannot be planted is prevented. This eliminates the need for the operator to plant seedlings manually, thereby reducing the labor of the operator.

  Next, the detail of the action | operation mechanism of the extrusion member 37 accommodated in the planting tool case 35 of the planting basket 27 is demonstrated.

  FIG. 13A shows a cross-sectional view of the planting basket 27 of the seedling planting device 23 according to the first embodiment, and FIG. 13B shows a cross-section S1-S1 of FIG.

  The push-out cam 71 is integrally fitted with the protruding portion of the rotating case 31 protruding into the planting tool case 35, and is rotatably provided with the rotation shaft 34 and the planting tool case 35 as a reference. A cam arm 72 slidably contacting the outer peripheral surface of the push cam 71 is pivotally supported by an arm shaft 73. The pushing cam 71 is disposed outside the rotating case 31 and on the rotating case side with respect to an operating arm 74 described later.

  Further, an operating arm 74 that rotates integrally with the cam arm 72 is pivotally supported on the arm shaft 73, and is provided at the tip of the operating arm 74 and the end of the seedling pusher 29 on the inside of the planting tool case 35. A fixed extrusion nut 70 is connected via a joint member 75. The seedling extrudate 29 is urged toward the projecting side of the planting member 36 via the joint member 75, and an extrusion spring 76 that urges the intermediate portion of the operating arm 74 is provided.

  The push cam 71 rotates relative to the rotation shaft 34 as a reference, and the operation arm 74 swings by the action of the cam mechanism composed of the push cam 71 and the cam arm 72.

  When the operating arm 74 is in a position where the push spring 76 is compressed, the push member 37 is in a retracted state. When the operating arm 74 is rotated from that position and the compression of the pushing spring 76 is relaxed, the seedling extrudate 29 is pushed out by the elastic force of the pushing spring 76 and the pushing member 37 protrudes.

  As shown in FIGS. 4 and 13, the operating arm 74 according to the first embodiment includes a parallel arm portion 74 a that is parallel to the rotation trajectory of the rotary case 31, and a tilt arm portion 74 b that is tilted away from the rotary case 31. The pushing spring 76 is pressed by the parallel arm portion 74a of the operating arm 74.

  Since the pushing spring 76 is configured to be pressed by the parallel portion 74a of the operating arm 74, the operating arm 74 is pressed within the width of the rotation guide of the operating arm 74, so that the posture of the operating arm 74 is not disturbed. The extruding member 37 is pushed out and the seedling can be planted reliably.

  In FIG. 13A, a protective member 77 is provided between the upper and lower sides of the seedling extrudate 29 and the arm shaft 73 that is the pivot point of the operating arm 74, and the operating arm 74 rotates to a position to push out the seedling extrudate 29. In this case, the actuating arm 74 comes into contact with the protective member 77. The protective member 77 is a cushion rubber provided inside the planting tool case 35 and is supported by a support boss 78. The protective member 77 absorbs the impact of the operating arm 74 when it is rotated by the elastic force of the push spring 76 and causes the seedling pusher 29 to protrude smoothly. Moreover, the pressing part with the seedling extrudate 29 of the operating arm 74 is protruded to the front side in the front-rear direction of the seedling extrudate 29.

  A protective member 77 is provided between the seedling extrudate 29 and the arm shaft 73 to receive the operating arm 74 moved to the extruding position, and the contact portion of the operating arm 74 with the seedling extrudate 29 is projected forward. The contact area between the operating arm 74 and the protection member 77 can be increased, the seedling extrudate 29 can be reliably pushed by the operating arm 74, and the planting rod 27 can be made compact. Thereby, the front-back width | variety of a seedling transplanter becomes short.

  As shown in FIG. 13A, an oil reservoir 80 is provided in front of the push nut 70. By providing the oil reservoir 80 in front of the push nut 70, it is possible to prevent the oil inside the planting tool case 35 from being knocked out by the push nut 70 without increasing the total length of the planting rod 27.

  Further, as a configuration in which a gap is provided between the cushion rubber support boss 78 and the extrusion nut 70, oil is prevented from being pushed out.

  Further, as shown in FIGS. 13 (a) and 13 (b), an oil bypass 79 is provided on the inner side surface of the cylindrical portion of the planting tool case 35 in which the seedling extrudate 29 slides, thereby making it compact. The structure prevents oil from being pushed out.

  In addition, the bush portion from which the seedling extrudate 29 protrudes from the planting tool case 35 is not provided with an oil reservoir space, but a recess is provided in the grease seal lip portion 81 so that the oil can be returned to the rear through the oil bypass 79. It is said. Thereby, oil can be returned, without lengthening the full length of the implantation pot 27. FIG.

  Also, as shown in FIGS. 4 and 12, a rotation amount adjustment member 50 that adjusts the rotation amount of the implantation basket 27 is provided, and the rotation amount adjustment member 50 is disposed between the implantation basket 27 and the rotation case 31. To do. By arranging the rotation amount adjusting member 50 between the planting basket 27 and the rotary case 31, the left-right direction of the seedling planting device 23 can be made compact.

  FIG. 16 is a cross-sectional plan view around the planting clutch 91 of the mission case 90 of the seedling transplanter of FIG. In FIG. 16, the left side is the front side of the aircraft, the right side is the rear side of the aircraft, the upper side is the left side of the aircraft, and the lower side is the right side of the aircraft.

  The power from the engine 11 is transmitted to a transmission in the transmission case 90 via a hydrostatic continuously variable transmission (HST) or the like, where it is separated into traveling power and external power to be extracted. The seedling planting unit 15 and the fertilizer application device are driven by the external extraction power. FIG. 16 is a view showing the surroundings of the planting clutch 91 in the mission case 90. The driving force for driving the seedling planting unit 15 is output from the planting output shaft 92 and the fertilizer output shaft 96 drives the fertilizer application device. The driving force to output is output. Further, in the mission case 90, there are provided a main inter-strain switching gear mechanism 93 and a sub-strain switching gear mechanism 94 for adjusting the inter-strain which is the interval between the seedlings. When changing between stocks relatively small, change the combination of gears in the main stock switching gear mechanism 93 using a main stock switching shifter (not shown). 94, after changing the gear combination using the sub-share change shifter 97, the gear combination of the main share change gear mechanism 93 is changed.

  In the present embodiment, the planting clutch 91 and the main stock switching gear mechanism 93 are arranged in the mission case 90 in the longitudinal direction of the body. Compared with the case where the planting clutch 91 and the like are separated, the number of parts can be reduced and the cost can be reduced. In addition, the input / output shaft constituting the main inter-substitution switching gear mechanism 93 and the input / output shaft constituting the inter-sub-substitution switching gear mechanism 94 are arranged so as to be perpendicular to each other. This ensures a balance between the front and rear of the aircraft. In addition, it is also possible to provide a separate gear for the multipurpose weeder in the sub-strain switching gear mechanism 94.

  In FIG. 15, the top view of mission case 90 periphery of the seedling transplanter concerning 1st embodiment is shown. In the seedling transplanter according to the first embodiment, the assembled side clutch 112 and the assembled brake 113 are configured separately. The configuration can be simplified and the cost can be reduced.

DESCRIPTION OF SYMBOLS 10 Traveling body 21 Planting transmission case 22 Seedling stand 27 Planting basket 29 Seedling extrusion body 30 Planting rotating shaft 30a Shaft angle surface 30b Inclined part 31 Rotating case 34 Rotating shaft 36 Planting member 37 Pushing member 39 Fixed member 40 Eccentric input gear 41 Relay gear 42 Eccentric output gear 44 Relay rotating shaft 47 Brake cam 47a First contact portion 47b Second contact portion 48 Braking arm 50 Rotation amount adjusting member 73 Arm shaft 74 Actuating arm 74a Parallel arm portion 74b Inclined arm portion 76 Extrusion spring 77 Protection member φ Distance between the axes of the two rotating shafts L Distance from the axis of the rotating shaft to the tip of the planting member

Claims (5)

In the seedling planting apparatus in which a rotation case (31) is provided on the planting rotation shaft (30) in the left-right direction, and a pair of planting ridges (27, 27) is provided in the rotation case (31),
The rotating case (31) is provided with an eccentric input gear (40) that is freely rotatable with respect to the planting rotation shaft (30), and a pair of rotating the pair of implantation rods (27, 27), respectively. Rotating shafts (34, 34), eccentric output gears (42, 42) are provided on the pair of rotating shafts (34, 34), respectively, and the pair of eccentric output gears from the eccentric input gear (40). (42, 42) are provided with a pair of relay gears (41, 41) for transmitting the driving force,
The rotation center of each of the pair of relay gears (41, 41) is not on a line connecting the rotation center of the eccentric input gear (40) and the rotation center of each of the pair of eccentric output gears (42, 42). And the rotational center of each of the pair of relay gears (41, 41) is disposed at a point-symmetrical position with respect to the rotational center of the eccentric input gear (40) , and
A pair of angle adjustment members (50, 50) for adjusting the rotation angle of the pair of implantation baskets (27, 27) are provided between the pair of implantation baskets (27, 27) and the rotation case (31). A seedling planting device characterized in that each is provided . The eccentric input gear (40), the pair of relay gears (41, 41), and the pair of eccentric output gears (42, 42) are arranged linearly in a front view or a plan view,
The left and right lengths of the pair of relay rotation shafts (44, 44) serving as the rotation centers of the pair of relay gears (41, 41) are set as the planting rotation shaft (30) and the pair of rotation shafts (34). 34) The seedling planting apparatus according to claim 1, wherein the seedling planting apparatus is shorter than the lateral length of 34). A pair of planting members (36, 36) for holding seedlings are provided on the pair of planting ridges (27, 27),
The distance (L) from the tip of each of the pair of planting members (36, 36) to the axis of each of the pair of rotating shafts (34, 34), and the pair of rotating shafts (34, 34) The distance between the centers of the shafts (φ) is the same, and the seedling planting device according to claim 1 or 2. The planting ridge (27) is provided with a seedling extrudate (29) for extruding a seedling held by the planting member (36), and an operating arm (74) for sliding the seedling extrudate (29) is provided. A push spring (76) for urging the operating arm (74) in the pushing direction;
A parallel arm portion (74a) that is parallel to the rotation trajectory of the rotating case (31) is formed on the operating arm (74), and the arm portion (74a) is pressed by the push spring (76). The seedling planting device according to claim 3, wherein A protective member (77) for receiving the operating arm (74) rotated to the pushing position is provided between the arm shaft (73) which is a rotation fulcrum of the operating arm (74) and the seedling extrudate (29). ,
The seedling planting device according to claim 4, wherein a contact portion between the operating arm (74) and the seedling extrudate (29) is projected forward of the protective member (77).

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