JP2015077115A - Seedling planting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling planting apparatus capable of preventing a vibration by a transmission rotor and oscillation of a resonance at the time when the seedling spacing is widened or when the rotation of a planting drive shaft is accelerated by raising a travel speed.SOLUTION: A seedling planting apparatus is provided in a rotary case 31 with: an eccentric input rotary body 40 mounted on a planting revolving shaft 30; an eccentric output rotor 42 mounted on a driving axle 34 for rotating a planting lever 27; and an eccentric relay rotor 41 for transmitting the driving force from the eccentric input rotary body 40 to the eccentric output rotor 42. The eccentric input rotary body 40 is formed with an input flat part 41f, and the eccentric output rotor 42 is formed with an output flat part 42f. The seedling planting apparatus is constituted so that the input flat part 40f, the relay flat part 41f, and the output flat part 42f contact each other either at the bottom dead center of the seedling planting locus of the planting lever 27 or over a position at which the planting lever 27 leaves above a field surface after having passed the bottom dead center.

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 according to claim 1 is provided with a planting transmission case (21) below the seedling mount (22) on which seedlings are loaded, and a planting rotary shaft that is driven to rotate in the planting transmission case (21) ( 30), a rotation case (31) is provided on the planting rotation shaft (30), and a planting rod (27) for taking seedlings from the seedling stand (22) and planting the rotation case (31) is provided. In the seedling planting device configured as described above, the rotating case (31) includes an eccentric input rotating body (40) to be mounted on the planting rotation shaft (30) and a rotation for rotating the planting rod (27). An eccentric output rotating body (42) to be mounted on the moving shaft (34), and an eccentric relay rotating body (41) for transmitting a driving force from the eccentric input rotating body (40) to the eccentric output rotating body (42), An input flat portion (40f) is formed in the eccentric input rotator (40), and the eccentric relay rotator is formed. 41) forming the relay flat part (41f) and the output flat part (42f) on the eccentric output rotating body (42), and the bottom dead center of the seedling planting locus of the planting rod (27), or The input flat portion (40f), the relay flat portion (41f), and the output flat portion (42f) come into contact with each other over a position where the planting ridge (27) is detached from the upper part of the farm scene after passing through the bottom dead center. This is a seedling planting device.

  According to a second aspect of the present invention, a plurality of meshing protrusions are formed at intervals on the outer periphery of the eccentric input rotating body (40), the eccentric relay rotating body (41), and the eccentric output rotating body (42). When the other engagement protrusion enters the interval portion of the engagement protrusion, the portion where the interval between the engagement protrusions becomes the narrowest is defined as the input flat portion (40f), the relay flat portion (41f), and the output flat portion (42f). It is a seedling planting apparatus of Claim 1 characterized by these.

  According to a third aspect of the present invention, the input maximum diameter portion (40 m) at which the diameters of the planting rotation shaft (30) and the eccentric input rotating body (40) are maximized at the rear side of the rotation upper side of the input flat portion (40f). ), And the diameters of the eccentric rotating shaft (44) and the eccentric relay rotating body (41) for mounting the eccentric relay rotating body (41) are maximized on the rear side of the upper side of the relay flat portion (41f). The maximum output diameter that forms the maximum relay diameter part (41m) and that the diameters of the rotating shaft (34) and the eccentric output rotating body (42) become maximum at the rear side of the rotation upper side of the output flat part (42f). Part (42m) is formed, and the relay maximum diameter part (41m) is the input maximum diameter part (40m) or the output maximum diameter part at the bottom dead center of the planting ridge (27) or the position after passing through the bottom dead center. (42m) and either of the maximum diameter part (41m) of the relay enters It is set as the arrangement configuration which contacts the other of the input maximum diameter part (40m) or the output maximum diameter part (42m) when it is separated from the maximum diameter part (40m) or the output maximum diameter part (42m). The seedling planting apparatus according to 1 or 2.

  According to a fourth aspect of the present invention, the rotating case (31) is provided with a non-circular braking cam (47), a braking contact member (48) contacting the braking cam (47) is provided, and the rotating case (31) is provided. ) Is formed with a convex portion (31c) for providing the eccentric relay rotator (41) at a lower position in the conveying direction than the eccentric input rotator (40) and the eccentric output rotator (42). 4. A braking urging member (49) for contacting the braking contact member (48) and urging the braking cam (47) side is provided on the opposite side of (31c). A seedling planting apparatus according to claim 1.

According to a fifth aspect of the present invention, a protrusion (47t) is formed on the braking cam (47),
The projecting portion (47t) contacts the braking contact member (48) before the planting basket (27) is detached from the field scene and before the seedling placing stand (22) is taken. The planting basket (27) passes through the swing contact member (48) at a position where the seedling is taken from the seedling mount (22), and brakes the brake contact member (48) by the biasing force of the brake biasing member (49). It is moved to the cam (47) side, It is a seedling planting apparatus of Claim 4 characterized by the above-mentioned.

  Invention of Claim 6 provides the said planting rotating shaft (30) in the center part of the said rotation case (31), provides the said eccentric input rotary body (40) in this planting rotating shaft (30), The rotating shafts (34, 34) are respectively provided at both ends of the rotating case (31), and a pair of the eccentric output rotating bodies (42, 42) are provided on the rotating shafts (34, 34). A relay rotating shaft (44, 44) is provided between the shaft (30) and the rotating shaft (34, 34) and on the lower side in the rotational direction, and the eccentric relay rotating body is provided on the relay rotating shaft (44, 44). (41, 41) are provided, and the housing protrusions (31a, 31a) for housing the braking urging members (49, 49) on the opposite side of the pair of convex portions (31c, 31c) on the upper side in the rotational direction The seedling planting apparatus according to claim 4 or 5, wherein the seedling planting apparatus is formed by projecting.

  According to the first aspect of the present invention, it extends from the bottom dead center of the seedling planting locus of the planting basket (27) or the position where the planting basket (27) leaves above the field scene after passing through the bottom dead center. Thus, the input flat portion (40f), the relay flat portion (41f), and the output flat portion (42f) are brought into contact with each other, whereby the eccentric input gear (40), the eccentric relay gear (41), and the eccentric relay gear (41). Since the play caused by the engagement of the eccentric output gear (42) can be suppressed, the eccentric input gear (40), the eccentric relay gear (41), and the eccentric output gear (42) are loaded by the load caused by the movement of the implantation rod (27). The rotation is disturbed, and the planting pod (27) is prevented from pulsating and the movement of the planting cocoon (27) is prevented from slowing down, so that the seedling planting accuracy is improved.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, when the other meshing protrusion enters the space between the one meshing protrusion, the distance between the meshing protrusions becomes the smallest. The input flat part (40f), the relay flat part (41f) and the output flat part (42f) are used as the parts, so that the eccentric input gear (40) and the eccentric relay gear (41) and the eccentric relay gear (41) and the eccentric part are eccentric. Since the generation of play due to the meshing load of the output gear (42) can be further suppressed, the movement of the planting basket (27) is stabilized, and the planting accuracy of the seedling is improved.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the relay maximum diameter portion ( 41 m) meshes with either the input maximum diameter portion (40 m) or the output maximum diameter portion (42 m), and the input maximum diameter portion (40 m) or the output maximum diameter portion (42 m) extends from the relay maximum diameter portion (41 m). When separated, the relay maximum diameter part (41m) meshes with the other of the input maximum diameter part (40m) or the output maximum diameter part (42m), so that the planting basket (27) in which the seedling is planted disengages upward from the field scene. Since the moving speed until it is made can be increased, the planting ridge (27) is prevented from coming into contact with the field scene around the seedling to form a hole, and the seedling is prevented from falling into the hole. The

  According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, braking biasing is performed on the opposite side of the convex portion (31c) of the rotating case (31). By providing the member (49), the amount of protrusion of the braking biasing member (49) can be suppressed, so that the rotating case (31) can be made compact.

  According to the invention described in claim 5, in addition to the effect of the invention described in claim 4, when the planting rod (27) takes the seedling from the seedling mount (22), the projection (47t) is braked. By passing through the contact member (48), the braking contact member (48) can be pushed out by the urging force of the braking urging member (49) and brought into contact with the braking cam (47). Can reduce the load applied when taking seedlings, prevent the planting pod (27) from pulsating and delaying movement, and ensure that the planting cocoon (27) takes a set amount of seedlings. Can improve seedling planting accuracy.

  According to the invention described in claim 6, in addition to the effect of the invention described in claim 5 or 6, the accommodating protrusion (31a, 31a) is arranged in the rotational direction at the opposite side of the pair of protrusions (31c, 31c). By projecting to the side, the one protrusion (31c) and the end of the accommodating projection (31a) are arranged in a substantially straight line, so that the rotating case (31) can be made compact.

  Moreover, by making the accommodation protrusions (31a, 31a) protrude toward the upper side in the rotation direction, it becomes difficult for the foreign matters in the field to be caught by the accommodation protrusions (31a, 31a), and the foreign matters are not easily caught in the accommodation protrusions (31a, 31a, 31a, 31a). Even if it is caught in 31a), the accommodation protrusion (31a, 31a) on the movement trajectory in which the planting rod (27) takes the seedling and moves the seedling to planting, and on the movement trajectory toward planting the seedling and then going to the next seedling harvesting ) Faces downward, the caught foreign matter is easy to fall, and the rotation of the seedling planting device is disturbed by the entangled foreign matter, and the work of removing the entangled foreign matter becomes unnecessary.

The side view of the seedling transplanting machine which provided the seedling planting apparatus concerning 1st embodiment of this invention Top view of the seedling transplanter in Fig. 1 The partial cross section figure from the left direction of the seedling planting apparatus concerning 1st embodiment of this invention Partial sectional view from the rear direction of the seedling planting device of FIG. Sectional drawing from the left direction of the rotation case which comprises the seedling planting apparatus of FIG. The 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 a rotating shaft of the seedling planting apparatus of FIG. 3 draws. (A) The figure which shows the positional relationship of each eccentric gear when the front-end | tip of the planting member comes to the lowest point of the seedling planting apparatus of FIG. 3, (b) The planting member of the seedling planting apparatus of FIG. The figure which shows the contact relationship of the flat part of each eccentric gear when the front-end | tip of the top comes to the lowest point, (c) Each eccentricity when the front-end | tip of a planting member of the seedling planting apparatus of FIG. 3 comes to the lowest point The figure which shows the contact relation of the maximum diameter part of the gear The figure which shows the positional relationship of the position of the axial center of a planting rotation axis, and each passing point on the seedling planting tool tip locus 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. The figure which showed the static locus | trajectory and dynamic locus | trajectory of the front-end | tip of a planting member of the seedling planting apparatus of FIG. The figure which shows the movement locus | trajectory of the front-end | tip of the planting member when changing between seedling stocks of the seedling planting apparatus of FIG. The side view from the left direction of the seedling planting apparatus when the seedling planting apparatus of FIG. 3 stops Sectional drawing of the planting basket of the seedling planting apparatus of FIG. 3, and S1-S1 sectional drawing Side view from left direction of braking cam of seedling planting apparatus according to second embodiment of the present invention Sectional view around the planting rotation axis of the seedling planting device 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 38. 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 disposed 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 eccentric relay gears 41 and 41 and two eccentric output gears 42 and 42 meshing with the eccentric 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 coaxially with the planting rotary shaft 30, and the eccentric input gear 40 has a third bearing 43. To support the rotating case 31. The eccentric relay gear 41 is configured to transmit the driving force from the eccentric input gear 40 to the eccentric output gear 42, and is attached to the relay transmission 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 rotational center of the eccentric relay gear 41 is a line connecting the rotational center of the eccentric input gear 40 and the rotational center of the eccentric output gear 42 in a side view. It is set as the structure located in other than. Furthermore, an isosceles triangle is formed by connecting the rotation center of the eccentric input gear 40, the rotation center of the eccentric relay gear 41, and the rotation center of the eccentric output gear 42. Further, the eccentric 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 eccentric relay are arranged. An arrangement configuration in which an “S” shape is drawn in a side view is formed by the rotation centers of the gears 41 and 41 and the rotation centers 42 and 42 of the eccentric output gear.

  In the present embodiment, the eccentric output gears 41 and 41 are arranged so as to be point-symmetric, and in this embodiment, the center of rotation of the eccentric 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 rotational center of the eccentric relay gear 41 in a side view other than on the line connecting the rotational center of the eccentric input gear 40 and the rotational center of the eccentric output gear 42, the rotational center of the eccentric input gear 40 is The distance from the rotation center of the eccentric 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 eccentric relay gear 41 can be arbitrarily set, and the number of teeth of each rotating body can be changed. Therefore, the number of teeth can be designed avoiding resonance, and vibration due to resonance is suppressed. be able to.

  At the end of the rotary case 31, there are two implantation rods 27, 27, and the rotation of the eccentric input gear 40 is performed at the rotation center of the eccentric relay gears 41, 41 that transmit the driving force to these implantation rods 27, 27. By arranging the center as a symmetric point and being point-symmetric, the unbalance of the heavy rotating case 31 can be reduced and vibration 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 eccentric 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 rotating bodies that are the gears have the same tooth width and the rotating bodies do not protrude in the axial direction. The left and right lengths of the relay rotation shaft 44 fitted to the eccentric relay gear 41 are shorter than the left and right lengths of the planting rotation shaft 30 coaxial with the eccentric input gear 40 and the rotation shaft fitted to the eccentric output gear 42. It is shorter than the left and right length of 34.

  By arranging the eccentric input gear 40, the eccentric 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 compactly. be able to.

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

  The eccentric input gear 40, the eccentric relay gear 41, and the eccentric output gear 42 are non-circular shapes having different gear teeth, different gear teeth intervals, and different gear teeth lengths. When the rotating case 31 rotates by meshing a plurality of non-circular gears, the implant rod 27 draws the trajectory shown in FIGS. 3 and 6 to 10.

  As shown in FIG. 7 (b), flat portions 40f, 41f, 41f, 41f, which are arranged on the outer peripheral edges of the eccentric input gear 40, the eccentric relay gear 41, and the eccentric output gear 42, respectively, are arranged in a substantially planar shape. When each of the flat portions 40f, 41f, and 42f of each non-circular gear is engaged with each other, the gap between the gear teeth is reduced. By reducing the gap between the gear teeth, even if the load of engagement of the eccentric input gear 40, the eccentric relay gear 41, and the eccentric output gear 42 increases, the occurrence of backlash (backlash) can be suppressed.

  Each of the flat portions 40f, 41f, and 42f starts to mesh at the bottom dead center of the planting locus of the planting rod 27, that is, at the lowest lowered position, or begins to mesh after passing through the bottom dead center, and the planting member 36 Start separating at a position that completely leaves the ground.

In addition, the position where said each flat part 40f, 41f, 42f leaves | separates is also a position where the planting rod 27 begins to switch from a planting attitude | position to a seedling harvesting attitude | position.
The position from the bottom dead center of the planting locus of the planting rod 27 until the planting member 36 is completely detached from the soil is set so that the planting member 36 can be quickly detached from the soil. It is necessary to increase the moving speed of 27. At the position where the planting member 36 is completely detached from the soil, the planting rod 27 is switched from the planting posture to the seedling-sewing posture, so that the eccentric input gear 40, the eccentric relay gear 41, and the eccentric output gear 42 are engaged. A looseness is generated by the load, and the planting basket 27 tends to pulsate, or the rotational movement of the planting basket 27 is likely to be delayed.

  However, after the flat portions 40f, 41f, 42f of the non-circular gears 27 have reached the bottom dead center or the bottom dead center of the planting locus of the planting rod 27, the planting member 36 is completely detached from the soil. By engaging the gear teeth in a state where the distance between the gear teeth is small over the position until the position is reached, the meshing load of the eccentric input gear 40, the eccentric relay gear 41, and the eccentric output gear 42 is suppressed, and the occurrence of backlash is prevented. Therefore, it is prevented that the planting rod 27 causes pulsation or the rotational movement is delayed, and the timing of seedling removal and seedling planting is prevented from shifting.

  As a result, the planting member 36 can be quickly removed from the soil, so that formation of a hole around the planting position of the seedling is prevented, and the seedling falls into this hole and the planting posture is reduced. Disturbance is prevented.

  Each non-circular gear has about 20 to 22 gear teeth, and the amount of movement of the implant rod 27 per gear tooth is about 16 ° to 18 °. As described above, since the width of the gear teeth and the interval between the gear teeth differ from one place to another, the above values are average values. The flat portion 27f is formed by arranging two gear teeth of the same width and making the distance between the two gear teeth substantially the same as that of one gear tooth.

  As shown in FIG. 7C, when the meshing portions of the flat portions 40f, 41f, and 42f of the eccentric input gear 40, the eccentric relay gear 41, and the eccentric output gear 42 pass, the eccentric input gear from the planting rotary shaft 30. From the input maximum diameter portion 40m where the diameter to the outer periphery of 40 is the maximum, the relay maximum diameter portion 41m where the diameter from the relay transmission shaft 44 to the outer periphery of the eccentric relay gear 41 is the maximum, and the rotation shaft 34 The maximum output diameter portion 42m having the maximum diameter up to the outer peripheral portion of the eccentric output gear 42 is configured to mesh with each other.

  Specifically, at the position where the input flat portion 40f and the relay flat portion 41f begin to separate in advance, the input maximum diameter portion 40m meshes with the relay maximum diameter portion 41m in advance. Since the rotational speed of the eccentric input gear 40 and the eccentric relay gear 41 is increased by meshing the input maximum diameter portion 40m and the relay maximum diameter portion 41m, the rotational movement speed of the implantation rod 27 can be increased. This operation is referred to as a first quick operation.

  When the maximum input diameter portion 40m and the maximum relay diameter portion 41m begin to separate, the maximum relay flat portion 41f and the maximum output flat portion 42f start to separate, and the maximum relay diameter portion 41m and the maximum output diameter portion 42m Start to mesh. Since the maximum relay diameter portion 41m and the maximum output diameter portion 42m mesh with each other, the rotational speed of the eccentric relay gear 41 and the eccentric output gear 42 is increased. Can be maintained. This operation is referred to as a second quick operation.

  With the above configuration, since the second quick operation is started simultaneously with the end of the first quick operation, the planting rod 27 is quickly moved from the bottom dead center to a position where the planting member 36 is completely detached from the soil. Therefore, the formation of a hole around the seedling in which the planting member 36 is planted is prevented, and the seedling falls into the hole and the planting posture is prevented from being disturbed.

The movement of the planting basket 27 by the first quick and the second quick is performed in the range of 32 ° to 36 ° with about 2 gear teeth, that is, the bottom dead center of the planting locus of the planting basket 27 as 0 degree. Is called.
In addition, at the position where the relay flat portion 41f and the output flat portion 42f begin to separate in advance, the relay maximum diameter portion 41m and the output maximum diameter portion 42m are engaged in advance to perform a first quick operation, and When the input flat portion 40f and the relay flat portion 41f start to be separated from each other, the input maximum diameter portion 40m and the relay maximum diameter portion 41m are engaged with each other, and the second quick operation may be performed.

  As shown in FIG. 5, a non-circular brake cam 47 is provided in the rotating case 31. The non-circular brake cam 47 is attached to the rotating shaft 34 so as to rotate integrally with the rotating shaft 34. A phase shift prevention mechanism is provided that includes a braking arm 48 that contacts the outer peripheral surface of the braking cam 47 and a braking spring 49 that presses the braking arm 48 against the braking cam 47. The contact surface side of the braking arm 48 has an arc shape and is configured to contact the outer peripheral surface of the braking cam 47.

  The brake cam 47, the brake arm 48, and the brake spring 49 are provided inside the pair of rotating cases 31, respectively. A portion of the rotating case 31 where the pair of eccentric relay gears 41 and 41 are provided is such that the pair of eccentric relay gears 41 and 41 is located on the upper side in the transport direction than the eccentric input gear 40 and the pair of eccentric output gears 42 and 42. In order to arrange, convex portions 31c and 31c projecting toward the upper side in the rotational direction are formed. On the other hand, concave portions 31d and 31d that are gently curved are formed on the opposite side of the convex portions 31c and 31c, that is, on the upper side in the rotational direction, and the rotating case 31 is formed in an S shape in a side view. .

  In the recesses 31d and 31d, receiving projections 31a and 31a projecting toward the upper side in the transport direction are formed, and receiving space portions 31b and 31b are formed in the receiving projections 31a and 31a, respectively. And the said braking springs 49 and 49 are each arrange | positioned inside this accommodation space part 31b and 31b. The brake springs 49 are arranged between the rotating shaft 34 of the eccentric output gear 42 and the relay rotating shaft 44 of the eccentric relay gear 41.

In addition, the protrusion amount of the said accommodating protrusion parts 31a and 31a shall be substantially the same as the protrusion amount of the said convex parts 31c and 31c.
Further, the pair of braking springs 49, 49 and the pair of receiving projections 31 a, 31 a are arranged at positions that are line-symmetric with respect to the planting rotary shaft 30 fitted to the eccentric input gear 40. To do.

  In the above-described configuration, the housing projections 31a and 31a are formed in the recesses 31d and 31d of the rotating case 31, and the projection amounts of the housing projections 31a and 31a and the projections 31c and 31c are substantially the same. , 49 is prevented from becoming large and the rotating case 31 is prevented from becoming large, and the seedling planting device 23 can be made compact.

  And by arrange | positioning a pair of braking springs 49 and 49 and a pair of accommodating protrusion part 31a, 31a in the position which becomes line symmetrical about the planting rotating shaft 30, the protrusion edge part of one accommodating protrusion part 31a Therefore, the rotating case 31 is prevented from being enlarged, and the seedling planting device 23 can be made compact.

  Further, by providing the housing projections 31a and 31a on the upper side in the rotational direction of the rotating case 31, the housing projections 31a and 31a can be used when the planting rods 27 and 27 plant seedlings in the farm field. Therefore, it is possible to prevent the foreign matter from being entangled with the seedling planting device 23 and prevent the foreign matter from interfering with the planting operation of the seedling planting device 23. At the same time, the operation of removing impurities from the seedling planting device 23 becomes unnecessary.

  Further, in the trajectory in which the planting rods 27 and 27 plant seedlings in the field and move upward to go to the next seedling, and in the trajectory to take seedlings from the seedling outlet 25 and plant the seedlings in the field, accommodation protrusions Since there is a position where each of the portions 31a and 31a faces downward, the foreign matter caught on the housing projections 31a and 31a is likely to fall downward, and further tangling of the foreign matter is prevented.

  The brake 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 picking seedlings from the seedling outlet 25 and a position for planting seedlings in the field. In addition, 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 comes into contact with the brake arm 48 when it is at a rotational position of 135 ° before rotation from the outer peripheral position where it comes into contact with the brake arm 48 when the planting basket 27 is in the position to take the seedling. The second contact portion 47b refers to the other portion. In the first contact portion 47a, the distance between the outer periphery of the braking cam 47 and the rotation center is increased stepwise.

  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 protrusion 47t is formed at one of the boundary portions between the first contact portion 47a and the second contact portion 47b.
The braking arm 48 is constantly pressed against the braking cam 47 by the urging force of the braking spring 49, and the pressure applied to the braking cam 47 is transmitted to the eccentric output gear 42 via the rotating shaft 34, and the eccentric output gear 42 rotates. Reduce the load caused by operation. Since the load applied to the eccentric output gear 42 changes for each position of the implantation rod 27 provided on the rotating shaft 34, the brake cam 47 has a configuration in which the diameters at a plurality of locations are different.

  In particular, in the position where the planting rod 27 takes a predetermined amount of seedlings from the seedling outlet 25 as shown in FIGS. 7A, 7B, and 7C (unless otherwise specified), the seedling culture medium The roots become strong resistance and load is easily applied, and the implant rod 27 pulsates due to the meshing load of the eccentric input gear 40, the eccentric relay gear 41, and the eccentric output gear 42, or the implant rod 27 rotates and moves. May be slow. As a result, the position where the planting ridge 27 passes through the seedling collecting opening 25 is shifted, and a seedling of a different amount from the set seedling is taken or the seedling is passed without taking the seedling. However, there is a problem that the planting accuracy is lowered.

  In order to prevent the occurrence of the pulsation, the protrusion 47t of the braking cam 47 contacts the braking arm 48 at a position on the lower side in the rotational direction from the position where the planting rod 27 takes the seedling from the seedling outlet 25, The brake arm 48 is arranged to be pushed up by the protrusion 47t until just before the seedling removing port 25 against the urging force of the brake spring 49. Then, when the planting rod 27 passes through the seedling outlet 25, when the protruding portion 47 t has completely passed through the braking arm 48, the braking arm 48 pushed out by the urging force of the braking spring 49 comes into contact with the braking cam 47. As a result, the impact of the contact is transmitted to the eccentric output gear 42 via the rotation shaft 34, so that the meshing load of the eccentric input gear 40, the eccentric relay gear 41 and the eccentric output gear 42 is reduced, and When the gutter 27 takes a seedling from the seedling collection opening 25, it is prevented that a pulsation occurs or the rotational movement is delayed, and the planting accuracy of the seedling 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. In FIG. 6, the eccentric input gear 40, the eccentric relay gear 41, and the eccentric output gear 42 indicate the positions of the rotating bodies when the rotation shaft 34 is at 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 a configuration in which the distal end of the planting member 36 is a conventional planting plant due to the configuration of the eccentric input gear 40, the eccentric 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 tooltip 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 eccentric gears in the rotary 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. 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 relay transmission shaft 44, which is the center of the eccentric relay gear 41, is positioned on the front side 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 relay transmission shaft 44 that is the axis of the eccentric relay gear 41 is the second straight line, The angle θ2 formed by the two straight lines is 18 ± 2 °.

  Furthermore, as shown in FIG. 7A, when the straight line connecting the relay transmission shaft 44 and the rotation shaft 34 and the third straight line are formed, the angle formed by the first straight line and the third straight line is the angle θ2 described above. And 18 ± 2 °. The angle θ3 at the intersection of the second straight line and the third straight line is 144 ± 4 °. Accordingly, when the first straight line, the second straight line, and the third straight line are respectively connected, that is, when the planting rotation shaft 30, the relay transmission shaft 44, and the rotation shaft 34 are connected by a straight line, an isosceles triangle is drawn. It becomes composition.

In other words, the eccentric input gear 40, the eccentric relay gear 41, and the eccentric output gear 42 are arranged at each vertex position of an isosceles triangle.
Further, 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 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 a circular arc whose radius is 0.85 times or more and 0.9 times or less of the length φ in 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 seedling claw tip drawn by a conventional seedling planting device, if the configuration is such that vibration is less likely to occur on the sparse planting side, the planting interval between 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 distal end of the operating arm 74 and the end of the seedling pusher 29 inside 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, oil is prevented from being pushed out by providing a gap between the cushion rubber support boss 78 and the extrusion nut 70.
Further, as shown in FIGS. 13 (a) and 13 (b), by providing an oil bypass 79 on the inner side surface of the tubular portion of the planting case 35 in which the seedling extrudate 29 slides, the compaction is achieved. The structure prevents oil from being pushed out.

  In addition, the bush portion from which the seedling extrudate 29 protrudes from the planting 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 adjusting member 50 for adjusting 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.

DESCRIPTION OF SYMBOLS 10 Traveling body 22 Seedling stand 27 Implantation rod 30 Planting rotary shaft 31 Rotating case 31a Housing projection part 31c Convex part 34 Rotating shaft 40 Eccentric input gear (eccentric input rotary body)
40f Input flat portion 40m Maximum input diameter portion 41 Eccentric relay gear (Eccentric relay rotating body)
41f Relay flat part 41m Relay maximum diameter part 42 Eccentric output gear (Eccentric output rotating body)
42f Output flat part 42m Maximum output diameter part 44 Relay rotating shaft 47 Brake cam 47t Projection part 48 Brake arm (brake contact member)
49 Brake spring (brake biasing member)

Claims (6)

A planting transmission case (21) is provided at a lower portion of a seedling mount (22) on which seedlings are loaded, and a planting rotation shaft (30) that is driven to rotate is provided on the planting transmission case (21). In the seedling planting apparatus which comprises a rotating case (31) in (30), and is provided with a planting basket (27) for taking and planting seedlings from the seedling mount (22) in the rotating case (31).
The rotating case (31) has an eccentric input rotating body (40) mounted on the planting rotating shaft (30) and an eccentric mounted on a rotating shaft (34) for rotating the planting rod (27). An output rotator (42) and an eccentric relay rotator (41) for transmitting driving force from the eccentric input rotator (40) to the eccentric output rotator (42);
An input flat portion (40f) is formed in the eccentric input rotator (40), a relay flat portion (41f) is formed in the eccentric relay rotator (41), and an output flat portion is formed in the eccentric output rotator (42). (42f)
The input flat portion (40f) extends from the bottom dead center of the seedling planting locus of the planting basket (27) or the position where the planting basket (27) leaves above the field scene after passing through the bottom dead center. And the relay flat part (41f) and the output flat part (42f) are in contact with each other.   A plurality of meshing protrusions are formed on the outer periphery of the eccentric input rotator (40), the eccentric relay rotator (41), and the eccentric output rotator (42), respectively, and the other meshing protrusion is formed at the interval between the one meshing protrusion. 2. The input flat portion (40f), the relay flat portion (41f), and the output flat portion (42f) are defined as locations where the interval between the meshing projections becomes the narrowest when the meshing projection enters. The seedling planting apparatus as described. An input maximum diameter portion (40 m) in which the diameters of the planting rotation shaft (30) and the eccentric input rotating body (40) are maximized is formed on the rear side of the rotation upper side of the input flat portion (40f),
A relay maximum diameter portion (maximum diameter of the eccentric rotating shaft (44) on which the eccentric relay rotating body (41) is mounted and the diameter of the eccentric relay rotating body (41) on the rear side of the rotation flat side of the relay flat portion (41f). 41m),
An output maximum diameter portion (42m) in which the diameters of the rotating shaft (34) and the eccentric output rotating body (42) are maximized is formed on the rear side of the rotation upper side of the output flat portion (42f),
The relay maximum diameter portion (41m) at the bottom dead center of the planting basket (27) or the position after passing through the bottom dead center is either the input maximum diameter portion (40m) or the output maximum diameter portion (42m). With contact,
When the maximum relay diameter portion (41m) is separated from the maximum input diameter portion (40m) or the maximum output diameter portion (42m), the input maximum diameter portion (40m) or the maximum output diameter portion (42m) is in contact with the other. The seedling planting apparatus according to claim 1 or 2, wherein the seedling planting apparatus is configured. A non-circular brake cam (47) is provided on the rotating case (31), and a brake contact member (48) that contacts the brake cam (47) is provided.
The rotating case (31) is provided with a convex portion (31c) for providing the eccentric relay rotating body (41) at a lower position in the transport direction than the eccentric input rotating body (40) and the eccentric output rotating body (42). And
The braking urging member (49) that contacts the braking contact member (48) and urges toward the braking cam (47) is provided on the opposite side of the convex portion (31c). The seedling planting apparatus of any one of 3. A protrusion (47t) is formed on the braking cam (47),
The projecting portion (47t) contacts the braking contact member (48) before the planting basket (27) is detached from the field scene and before the seedling placing stand (22) is taken. The planting basket (27) passes through the rocking contact member (48) at a position where it takes the seedling from the seedling platform (22),
The seedling planting device according to claim 4, wherein the braking contact member (48) is moved toward the braking cam (47) by the urging force of the braking urging member (49). The planting rotary shaft (30) is provided at the center of the rotary case (31), and the eccentric input rotary body (40) is provided on the planting rotary shaft (30).
The rotating shafts (34, 34) are respectively provided at both ends of the rotating case (31), and a pair of the eccentric output rotating bodies (42, 42) are provided on the rotating shafts (34, 34),
Relay rotation shafts (44, 44) are provided between the planting rotation shaft (30) and the rotation shafts (34, 34) and on the lower side in the rotation direction, respectively. Provide eccentric relay rotating bodies (41, 41),
An accommodation protrusion (31a, 31a) for accommodating the braking biasing member (49, 49) is formed on the opposite side of the pair of protrusions (31c, 31c) so as to protrude toward the upper side in the rotational direction. The seedling planting device according to claim 4 or 5.

Images