JP2012135270A - Seedling planting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change the trajectory of a distal end part of a seedling planting implement of a seedling planting device.SOLUTION: The seedling planting device includes: rotary cases 30 rotatably attached to a planting power-transmission part frame 21; planting bodies 27 rotatably attached to the rotary cases 30; and at least one guide cam 32 fixed to the planting power-transmission part frame 21. Each planting body 27 includes a body 37, a seedling catching nail 40 attached to the body 37 to catch seedlings from a seedling mat, and at least one driven cam 34 to be guided by the guide cam 32. As the rotary cases 30 are rotated, the planting bodies 27 are rotated, and according to the rotation of the planting bodies 27, the driven cams 34 are moved along the guide cam 32.

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 that takes seedlings from a seedling mat mounted on a seedling placement stand placed behind a seedling transplanting machine such as a riding rice transplanter, it is centered on the rotation driving shaft in the left-right direction A seedling planting tool having a seedling picking claw and a seedling extrudate is arranged at approximately 120 degree intervals between the left and right rotation trisecting angles of the rotating rotary case, and the tip of the seedling planting tool is rotated during the rotation of the rotary case. A technique is known in which a part is projected to the rotating outer periphery of a rotary case, and a seedling separation and planting operation is performed by drawing a substantially elliptical planting locus line (see, for example, Patent Document 1 and Patent Document 2). ).

  FIG. 26 shows a side view of the seedling planting device of the riding type rice transplanter in Patent Document 1, FIG. 27 shows an internal left side view of the seedling planting device, and FIG. 28 shows the seedling planting device. The inner right side view of is shown. 26 and 27, the left side indicates the front of the riding type rice transplanter, and in FIG. 28, the right side indicates the front of the riding type rice transplanter.

  The seedling planting apparatus 200 is one set for every two strips, and is provided at the rear end of the planting transmission part of the planting transmission part case 201 provided behind the riding type rice transplanter.

  A fixed support body 202 is provided integrally with the planting transmission part case 201 at the rear end of the planting transmission part case 201, and a rotating body (rotary case) 203 rotates around the rotation shaft 208 inside the fixed support body 202. Fits freely. The rotary body 203 is provided with three final shafts 207 so as to be rotatable at a phase of 120 degrees with respect to each other on a circumference centered on the rotary shaft (sun gear shaft) 208. A seedling planting tool 204 is integrally attached to both left and right ends protruding from 203.

  A driving gear 209 that rotates integrally with the rotating body 203 is provided inside the rotating body 203. By rotating the drive gear 209 at a reduced speed with the input gear 210 provided at the rear end of the planting transmission case 201, the rotating body 203 rotates in the direction of arrow B.

  FIG. 27 shows the meshing state of the drive gear 209 and the input gear 210. The number of teeth of the drive gear 209 is three times the number of teeth of the input gear 210, and the drive gear 209 has three positions (0 °, 120 °, 240 ° from the rotation center with reference to the meshing position with the input gear 210 in FIG. ) Is a non-equal-diameter gear having a maximum diameter, and the input gear 210 is meshed with the drive gear 209 in FIG. 27 (position of 0 ° with respect to the mesh position of the drive gear 209 in FIG. 27). Is an unequal-diameter gear with a minimum diameter. Therefore, when the drive gear 209 meshes with the input gear 210 at the positions of 0 °, 120 °, and 240 °, the rotation speed of the drive gear 209 increases, and the rotation speed of the drive gear 209 changes in 1/3 period.

  In addition, a gear train for transmission to the final shaft 207 is provided inside the rotating body 203.

  The rotation of the drive gear 209 that meshes with the input gear 210 causes the rotation body 203 integrated with the drive gear 209 to rotate, and the rotation gear 211 that meshes with the internal gear 218 fixed to the case inner surface of the fixed support 202. In conjunction with the rotation of 203, the rotary body 203 rotates while moving on a circular orbit about the sun gear shaft 208.

  The rotating gear 211 and the first eccentric gear 213 are loosely fitted to a support shaft 212 whose ends are fixedly supported on both side walls of the rotating body 203, and the rotating gear 211 and the first eccentric gear 213 rotate integrally.

  The first eccentric gear 213 meshes with the second eccentric gear 214, and the second eccentric gear 214 is fixed to the sun gear shaft 208 whose ends are rotatably supported on both side walls of the rotating body 203. Therefore, when the inconstant speed gear 215 is rotated by the rotation of the second eccentric gear 214, the counter gear 216 that meshes with the sun gear 223 is connected to the counter gear via the sun gear 223 fixed to the sun gear shaft 208. The final gear 217 meshing with 216 is driven.

  The final gears 217 are individually fixed and supported by three final shafts 207 provided at equal intervals on the circumference centering on the sun gear shaft 208. Note that the final shaft 207 is also a non-circular gear (unequal diameter gear) in the same manner as the inconstant speed gear 215.

  When the rotating body 203 rotates, three seedling planting tools 204 provided on both sides of the rotating body 203 move on the circular path. At that time, the operation of the rotating gear 211 interlocked with the rotation of the rotating body 203 is transmitted to the final shaft 207 via the gear train, and the posture of the seedling planting tool 204 changes. Thereby, the seedling planting tool 204 operates so that the tip of the seedling picking claw 205 draws a locus 230.

  Further, inside the rotating body 203, there are a braking cam 219 attached so as to rotate integrally with the final shaft 207, and a bifurcated braking arm 220 that abuts on the outer peripheral surface of the braking cam 219 and loosely fits on the fixed shaft 224. There are provided three sets of phase shift prevention mechanisms comprising a spring 221 that presses the braking arm 220 against the braking cam 219 and a fastener 222 that is provided on the sun gear shaft 208 and has a protrusion that locks inside the spring 221. .

  As shown in FIG. 26, each seedling planting tool 204 has a bifurcated fork-shaped seedling claw 205 having a sharp tip and a seedling extrudate that projects and retracts below the seedling claw 205. 206.

  The seedling extrudate 206 is configured to move back and forth according to the rotational movement of the final shaft 207 by a link mechanism using a cam, and can move back and forth at a predetermined cycle by the rotation of the rotating body 203. it can.

  The seedling picking claws 205 are scraped and held while sandwiching the seedlings on the seedling mount, so that the seedlings held by the seedling picking claws 205 are turned to the field by rotating the seedling extruding body 206 in the front-rear direction. Pushed out.

JP 2008-92881 A JP 2007-89481 A

  However, in the above-described conventional seedling planting device, the locus of the tip of the seedling planting tool cannot be easily changed.

  A trajectory 230 of the tip portion of the seedling transplanter 204 shown in FIG. 26 and the like shows a static trajectory when the seedling transplanter is not traveling, but the tip of the seedling transplanter depends on the traveling speed of the seedling transplanter. The appropriate shape of the static locus drawn by the part is different.

  Therefore, it is desirable to adjust the trajectory drawn by the tip of the seedling planting tool to be an appropriate trajectory corresponding to these conditions. However, the conventional seedling planting device uses a complicated gear combination mechanism. Since the locus of the tip part of the seedling planting tool is realized, the locus cannot be easily changed.

  An object of this invention is to provide the seedling planting apparatus which can change easily the locus | trajectory which the front-end | tip part of a seedling planting tool draws in view of the subject of such a conventional seedling planting apparatus.

  The above-mentioned problem of the present invention is solved by the following means.

The first aspect of the present invention is
A seedling planting device for taking seedlings from a seedling mat loaded on a seedling placing stand (22) arranged behind a traveling vehicle body (10) and planting the seedlings on a farm field,
A rotating case (30) rotatably attached to the planting transmission part frame (21);
A planting body (27) rotatably attached to the rotating case (30);
Comprising one or more guide cams (32) fixed to the planting transmission part frame (21);
The planted body (27) includes a planted body (37), a seedling picking claw (40) attached to the planted body (37) and taking the seedling from the seedling mat, and the guide cam (32). ) One or more driven cams (34) guided by
The planted body (27) rotates as the rotating case (30) rotates, and the driven cam (34) moves along the guide cam (32) according to the rotation of the planted body (27). It is the seedling planting apparatus characterized by having set it as the structure to do.

The second aspect of the present invention
The planting body (27) has a rotating shaft (35) pivotally supported by the rotating case (30),
The driven cam (34) includes a driven cam body (38) and cam rollers (39, 71) attached to the driven cam body (38).
The planted body (37) is fixed to a part of the rotating shaft (35) and the driven cam body (38) is fixed to the other part,
The guide cam (32) has guide grooves (33, 70),
The seedling planting apparatus according to the first aspect of the present invention is characterized in that the cam rollers (39, 71) are guided by the guide grooves (33, 70).

The third aspect of the present invention
A plurality of the driven cams (34) constituted by the driven cam main body (38) and the cam roller (39) are provided, and each driven cam main body (38) serves as one driven cam plate (380). In the seedling planting apparatus according to the second aspect of the present invention, the cam rollers (39, 71) are attached to the one driven cam plate (380).

The fourth aspect of the present invention is
Two guide cams (32) and two follower cams (34) are provided,
The cam rollers (39, 71) are a main cam roller (39) and an auxiliary cam roller (71), and are attached to the same surface side of the driven cam plate (38),
The two guide cams (32) are, as the guide grooves (33, 70), a main guide groove (33) and an auxiliary guide groove (corresponding to the main cam roller (39) and the auxiliary cam roller (71), respectively. 70) with one plate having
The main cam roller (39) is formed longer than the auxiliary cam roller (71),
Forming the main guide groove (33) deeper than the auxiliary guide groove (70);
The main cam roller (39) is always guided by the main guide groove (33),
The third aspect of the present invention is characterized in that the auxiliary cam roller (71) is configured not to contact the auxiliary guide groove (70) at a position where the auxiliary guide groove (70) intersects the main guide groove (33). This is a seedling planting device.

The fifth aspect of the present invention provides
Two guide cams (32) and two follower cams (34) are provided,
The cam rollers (39, 71) are a main cam roller (39) and an auxiliary cam roller (71), and are attached to the same surface side of the driven cam plate (38),
The two guide cams (32) serve as the guide grooves (33, 70) as main guide grooves (33) and auxiliary guide grooves (70) corresponding to the main cam roller (39) and the auxiliary cam roller (71), respectively. ) With one plate having
The main guide groove (33) and the auxiliary guide groove (70) are configured with the same depth,
In the seedling planting apparatus according to the third aspect of the present invention, the main cam roller (39) is always guided by the main guide groove (33).

The sixth aspect of the present invention provides
Two guide cams (32) and two follower cams (34) are provided,
The cam rollers (39, 71) are a main cam roller (39) and an auxiliary cam roller (71), and are attached to the same surface side of the driven cam plate (38),
The two guide cams (32) serve as the guide grooves (33, 70) as main guide grooves (33) and auxiliary guide grooves (70) corresponding to the main cam roller (39) and the auxiliary cam roller (71), respectively. ) With one plate having
The main cam roller (39) is always guided by the main guide groove (33),
The position of the auxiliary guide groove (70) corresponds to the position of the auxiliary cam roller (71) at which the operation of at least the main cam roller (39) may become unstable or a load may be applied to the planted body (37). The seedling planting apparatus according to the third aspect of the present invention is characterized in that it is configured as described above.

The seventh aspect of the present invention
The seedling according to the second aspect of the present invention is characterized in that two driven cams (129, 130) are provided and the driven cam body (38) is fixed to both ends of the rotating shaft (35). It is a planting device.

In addition, the eighth aspect of the present invention
Forming a convex portion along the longitudinal direction at the bottom of the guide groove (87);
The seedling planting according to any one of the second to seventh aspects of the present invention, wherein a concave portion for moving the cam roller (85) along the convex portion is formed at a tip (88) of the cam roller (85). It is an attached device.

The ninth aspect of the present invention provides
Forming a recess along the longitudinal direction at the bottom of the guide groove (91);
The driven cam (34) includes a rotatable spherical member (92) that comes into contact with the concave portion at a distal end portion of the cam roller (89), and a spring member that biases the spherical member (92) in a direction in which the spherical member (92) is pressed against the concave portion. (93) It is set as the structure which has (93), It is the seedling planting apparatus of this invention in any one of the 2nd-7th.

  According to the first aspect of the present invention, one or more guide cams (32) that are not rotated are attached to one end of the rotating shaft (35) of the planting body (27) that rotates together with the rotating case (30). By bringing the driven cam (34) into contact, the planted body (27) moves along a locus (50) according to the guide cam (32) and is held and moved in a posture according to the guide cam (32). Since the seedling can be reliably scraped off by bringing the planted body (27) into contact with the seedling mat placed on the seedling placing stand (22) from a substantially orthogonal direction, it is possible to prevent the absence of a stock and However, the work of manually planting seedlings in the field is omitted, and the labor of the operator is reduced.

  In addition, when the seedling held by the planted body (27) is planted in the field, the locus where the planted body (27) enters and exits the soil can be set to a locus that is substantially the same. It is possible to prevent the digging groove of the planted body (27) from being formed around the attachment position, the planted seedling is not collapsed by the digging groove, and the growth of the seedling is stabilized.

  According to the second aspect of the present invention, the cam roller (39, 71) of the planted body (27) is brought into contact with the guide groove (33, 70) formed in the guide cam (32), thereby rotating the planted body (27). Since the locus does not shift and it is possible to prevent interference with each other even if the plurality of planting bodies (27) are rotated, it is possible to prevent the seedling planting interval from being disturbed or a part that cannot be planted from occurring. , Seedling planting accuracy is improved.

  In addition, since the timing of scraping off the seedling from the seedling mat and the timing of planting the seedling in the field can be kept constant, the planting interval of seedlings can be further prevented from being disturbed and parts that cannot be planted can be prevented. Improves planting accuracy.

  Further, the locus of the planted body (27) is determined by bringing the cam rollers (39, 71) into contact with the guide grooves (33, 70), thereby preventing the planted body (27) from swinging due to vibration. Therefore, planting accuracy is further improved.

  According to the third aspect of the present invention, the driven cam body (38) of the plurality of driven cams (34) can be constituted by one driven cam plate (380), so that the cost of the seedling planting device (23) can be reduced. Miniaturization can be achieved.

  According to the fourth aspect of the present invention, the main cam roller (39) that determines the movement trajectory of the planted body (27) is brought into contact with the main guide groove (33) formed in the guide cam (32), so that the attitude of the planted body (27). By bringing the auxiliary cam roller (71) that stabilizes the plant into contact with the auxiliary guide groove (70) formed in the guide cam (32), the planting body (27) moves along a movement locus according to the main guide groove (33). At the same time, it moves while being held in a posture according to the auxiliary guide groove (70), so that the seedling mat (27) is brought into contact with the seedling mat placed on the seedling placing stand (22) from a substantially orthogonal direction, so that the seedling can be obtained. It can be surely scraped off, and the occurrence of a stock loss is prevented, and the work of manually planting seedlings in the field by the worker is omitted, thereby reducing the labor of the worker.

  Since the length of the main cam roller (39) is longer than that of the auxiliary cam roller (71), the main cam roller (39) always contacts the main guide groove (33). This will stabilize the seedling planting accuracy.

  Further, the auxiliary cam roller (71) is configured not to contact the auxiliary guide groove (70) at the crossing position of the main guide groove (33) and the auxiliary guide groove (70), so that the auxiliary cam roller (71) can be easily moved to the crossing position. Therefore, it is possible to set an appropriate work locus of the planting body (27) with a simple configuration.

  According to the fifth aspect of the present invention, the depth of the auxiliary guide groove (70) at the intersection of the auxiliary guide groove (70) and the main guide groove (33) is the same as the depth of the main guide groove (33). Since the auxiliary cam roller (71) can easily pass through the crossing position, an appropriate work locus of the planted body (27) can be set with a simple configuration.

  According to the sixth aspect of the present invention, for example, the auxiliary cam roller (71) intersects by preventing the auxiliary guide groove (70) from being formed at a portion where the auxiliary guide groove (70) and the main guide groove (33) intersect. Since the position can be easily passed, an appropriate work locus of the planting body (27) can be set with a simple configuration.

  Moreover, since the distance which forms an auxiliary | assistant guide groove (70) becomes short, while the structure of a seedling planting apparatus (23) becomes simple, weight reduction can be achieved.

  According to the seventh aspect of the present invention, the main cam roller (131) and the auxiliary cam roller (132) are provided on the left and right sides of the planted body (27), and the main cam roller (131) and the auxiliary cam roller (132) are connected to the planted body (27). ) In contact with the main guide groove (127) formed in the non-rotating guide cam (125) disposed on the left and right one side of the guide) and the auxiliary guide groove (128) formed on the non-rotating guide cam (126) disposed on the left and right side. Since the planted body (27) moves along a movement trajectory according to the main guide groove (127) and moves while being held in a posture according to the auxiliary guide groove (128). Since the seedling can be reliably scraped off by bringing the planted body (27) into contact with the seedling mat placed on (22) from a substantially orthogonal direction, the occurrence of a stock loss is prevented, and the operator manually Planting seedlings in the field Kicking work is omitted, the labor of the worker is reduced.

  In addition, when the seedling held by the planted body (27) is planted in the field, the locus where the planted body (27) enters and exits the soil can be set to a locus that is substantially the same. It is possible to prevent the digging groove of the planted body (27) from being formed around the attachment position, the planted seedling is not collapsed by the digging groove, and the growth of the seedling is stabilized.

  The main guide groove is provided by providing the guide cam (125) having the main guide groove (127) and the guide cam (126) having the auxiliary guide groove (128) on the left and right sides of the planted body (27). (127) and the auxiliary guide groove (128) do not cross each other, and the main cam roller (131) and the auxiliary cam roller (132) can be formed of the same member, so the configuration of the seedling planting device (23) is simple. And cost reduction.

  According to the eighth aspect of the present invention, convex portions are formed on the surfaces of the main guide groove (87) and the auxiliary guide groove (87), and the main guide is provided at the end portions (88) of the main cam roller (85) and the auxiliary cam roller (85). The main cam roller (85) and the auxiliary cam roller (85) are formed into the main guide groove (87) and the auxiliary guide groove (85) by forming the recess along the convex portion formed on the surface of the groove (87) and the auxiliary guide groove (87). 87), the planting body (27) can be prevented from being disturbed in posture, so that the seedling is planted in an appropriate posture in the field, so that the planting accuracy is improved.

  According to the ninth aspect of the present invention, concave portions are formed on the surfaces of the main guide groove (91) and the auxiliary guide groove (91), and the main guide groove (91) is formed at the ends of the main cam roller (89) and the auxiliary cam roller (89). And the protrusions (92) that enter the recesses formed on the surface of the auxiliary guide groove (91), respectively, so that the main cam roller (89) and the auxiliary cam roller (89) are connected to the main guide groove (91) and the auxiliary guide groove ( 91), it is possible to prevent the planted body (27) from being disturbed in posture, so that the seedling is planted in an appropriate posture in the field, so that planting accuracy is improved.

  Then, a spring member (93) for biasing the convex body (92) downward is provided between the ends of the main cam roller (89) and the auxiliary cam roller (89) and the convex body (92). Since the body (92) is firmly in contact with the main guide groove (91) and the auxiliary guide groove (91), the working locus of the planted body (27) is further stabilized, and the planting accuracy is improved.

Left side view of riding type rice transplanter according to Embodiment 1 of the present invention The top view of the riding type rice transplanter of Embodiment 1 of this invention Horizontal sectional view of the seedling planting apparatus of Embodiment 1 of the present invention The side view of the planting transmission part case of Embodiment 1 of this invention 1 is a perspective view of an outer frame of a rotating case equipped with a seedling planting tool according to Embodiment 1 of the present invention. The top view of the guide cam of Embodiment 1 of this invention (A) The top view of the guide cam which showed the relationship with the driven cam of Embodiment 1 of this invention, (b) Sectional drawing of the driven cam of Embodiment 1 of this invention The figure explaining the locus | trajectory of the seedling planting tool tip at the time of seedling planting operation | movement of Embodiment 1 of this invention. The partial expanded sectional view of the guide cam of Embodiment 1 of this invention (A)-(c) The figure which shows the structural example of the main guide groove and auxiliary guide groove in the guide cam of Embodiment 1 of this invention. Sectional drawing which shows the relationship between the cam roller front-end | tip part and guide groove of Embodiment 1 of this invention Sectional drawing which shows the relationship between the cam roller front-end | tip part of another structure of Embodiment 1 of this invention, and a guide groove. (A) Cross-sectional view showing the relationship between the cam roller front end portion and the guide groove of another configuration of the first embodiment of the present invention, (b) Cam roller front end portion and guide of the other configuration of the first embodiment of the present invention. Schematic plan view showing the relationship of grooves The schematic plan view which shows the relationship between the cam roller front-end | tip part of another structure of Embodiment 1 of this invention, and a guide groove. (A) The top view of the guide cam of the other structure of Embodiment 1 of this invention, (b) Sectional drawing of the guide cam of the other structure of Embodiment 1 of this invention, and a driven cam The top view of the guide cam which showed the relationship between the guide cam of another structure of Embodiment 1 of this invention, and a driven cam Sectional drawing which showed the relationship between the guide cam of other structures of the Embodiment 1 of this invention, and a driven cam Sectional drawing which showed the relationship between the guide cam of other structures of the Embodiment 1 of this invention, and a driven cam Sectional drawing which showed the relationship between the guide cam of other structures of the Embodiment 1 of this invention, and a driven cam (A) The top view of the guide cam of the other structure of Embodiment 1 of this invention, (b) The side view of the guide cam of the other structure of Embodiment 1 of this invention (A) Bottom view of a guide cam of another configuration according to the first embodiment of the present invention, (b) S2-S2 sectional view of a guide cam of another configuration according to the first embodiment of the present invention, (c). S3-O-S3 sectional view of a guide cam of another configuration according to the first embodiment of the present invention. Sectional drawing of the seedling planting tool of Embodiment 1 of this invention (A) Side view of the seedling planting tool in the state of removing the seedling planting tool case of Embodiment 1 of the present invention, (b) Removing the seedling planting tool case of Embodiment 1 of the present invention Rear view of seedling planting tool in state The perspective view of the rotation case part of the seedling planting apparatus provided with the extrusion cam of the other structure of Embodiment 1 of this invention (A) The front view of the rotating case part of the seedling planting device provided with the extrusion cam of another configuration according to the first embodiment of the present invention, as viewed from the front, (b) the first embodiment of the present invention, The side view of the rotation case part of the seedling planting apparatus provided with the extrusion cam of another structure, (c) The rotation case part of the seedling planting apparatus provided with the extrusion cam of the other structure of Embodiment 1 of the present invention , Rear view from the back Side view of a conventional planting device for riding rice transplanters Internal left side view of a conventional seedling planting device for a riding rice transplanter Internal right side view of a conventional seedling planting device for a riding rice transplanter

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
1 and 2 show a left side view and a plan view of a riding type rice transplanter equipped with the seedling planting apparatus according to Embodiment 1 of the present invention.

  This riding type rice transplanter is equipped with an engine 11 and is provided with a six-row seedling planting portion via a lifting link device 14 at the rear of a traveling vehicle body 10 having a pair of left and right front wheels 12 and rear wheels 13 that are driven and rotated. 15 are connected.

  Further, the traveling vehicle body 10 is provided with a driver seat 16, a steering handle 17 for steering the front wheels 12, and a spare seedling table 18 on which spare seedlings are placed. The driver's seat 16 is provided with a shift lever 20 that performs a shift operation of a transmission 19 that changes engine power.

  In the present specification, the front / rear / left / right direction reference defines the front / rear, left / right reference based on the traveling direction of the vehicle body as viewed from the driver's seat.

  The seedling planting section 15 is provided with a seedling mounting base 22 that is inclined so that the front portion is higher on the upper side of the planting transmission section case 21 to which transmission is input from the traveling vehicle body 10, and the planting transmission section case 21 is planted. One set of seedling planting devices 23 is provided for every two strips at the rear end of the transmission section.

  When the aircraft is advanced with the float 24 in contact with the ground, the seedling table 22 reciprocates left and right, and the mat seedlings on the table are sequentially supplied to the seedling outlet 25 on the lower end side of the seedling table 22 one by one. The seedling planting device 23 separates and takes out and plantes it in the field.

  In addition, the seedling planting portion 15 is provided on both sides of the aircraft so that it can be raised and lowered. The seedling planting portion 15 is lowered on the field, and the machine body makes a U-turn on the field at the tip, and is previously drawn as a mark indicating the next aircraft traveling direction. For this purpose, a marker 26 is provided.

  Next, the configuration of the seedling planting device 23 according to the first embodiment will be described.

  In FIG. 3, the horizontal sectional view of the seedling planting apparatus 23 of this Embodiment 1 is shown.

  The rotating case 30 is supported by rotating shafts 36 on both sides of the rear end portion of the planting transmission portion case 21. When the rotation shaft 36 is rotated by the transmission mechanism of the planting transmission portion case 21, the rotation case 30 rotates together with the rotation shaft 36.

  In the rotating case 30 of the first embodiment, a rotating case inner frame 29 arranged on the planting transmission part case 21 side and a rotating case outer frame 28 arranged outside the planting transmission part case 21 rotate. It is joined by a case joining screw 31.

  On the outer side surface of the rotating case 30, three seedling planting tools 27 are pivotally supported by the rotating case outer frame 28 by the rotating shaft 35 at positions that are equidistant from the rotating shaft 36.

  In the seedling planting tool 27, a planting tool arm 37 is fixed to one end of a rotating shaft 35, and a driven cam 34 is fixed to the other end of the rotating shaft 35. The planting tool arm 37 and the driven cam 34 are Rotate integrally with the rotation shaft 35. As shown in FIG. 3, the driven cam 34 is disposed inside the rotating case 30, and the planting tool arm 37 is disposed outside the rotating case 30.

  A guide cam 32 that is fixed to the planting transmission case 21 and includes a main guide groove 33 and an auxiliary guide groove 70 that circulates around the rotation shaft 36 is provided inside the rotation case 30.

  The guide cam 32 is arranged so that a part of the driven cam 34 fits in the main guide groove 33 and the auxiliary guide groove 70, and according to the movement of the driven cam 34 guided by the main guide groove 33 and the auxiliary guide groove 70. The rotation shaft 35 rotates, and the planting tool arm 37 rotates together with the rotation shaft 35.

  Since the seedling planting tool 27 is attached to the rotation case outer frame 28 of the rotation case 30 that rotates with the rotation of the rotation shaft 36, it rotates around the rotation shaft 36 with the rotation of the rotation shaft 36. . On the other hand, the guide cam 32 is fixed to the planting transmission case 21 and does not rotate even if the rotating shaft 36 rotates. Therefore, when the rotating shaft 36 rotates, the seedling planting tool 27 has the driven cam 34 as the main cam. While being guided by the guide groove 33 and the auxiliary guide groove 70, the rotation shaft 35 itself rotates, and the center of the rotation shaft 35 rotates so as to draw a circular orbit about the rotation shaft 36.

  The seedling planting tool 27 corresponds to an example of the planted body of the present invention, and the planting tool arm 37 corresponds to an example of the planted body of the present invention. Moreover, the planting transmission part case 21 corresponds to an example of the planting transmission part frame of the present invention.

  In FIG. 4, the side view of the planting transmission part case 21 of the state which has not mounted | wore with the rotation case 30 is shown.

  When the transmission shaft 49 rotates, the gear 46 that rotates integrally with the transmission shaft 49 rotates, and the gear 48 rotates through the chain 45, the gear 47, and the chain 44. The rotating case 30 rotates as the rotating shaft 36 rotates together with the gear 48.

  FIG. 5 shows a perspective view of the rotating case outer frame 28 to which the seedling planting tool 27 of the first embodiment is attached, and FIG. 6 shows a plan view of the guide cam 32. In FIG. 6, the shaded portion represents a planar portion where no groove is formed.

  The driven cam 34 stands at a position different from the plate-like support body 38, the main cam roller 39 standing at a position away from the rotation shaft 35 of the plate-like support body 38, and the main cam roller 39. An auxiliary cam roller 71 is used. The main cam roller 39 moves along the main guide groove 33 while fitting into the main guide groove 33 of the guide cam 32, and the auxiliary cam roller 71 moves along the auxiliary guide groove 70 while fitting into the auxiliary guide groove 70. To go. When the main cam roller 39 is guided by the main guide groove 33, the rotation shaft 35 rotates, and the planting tool arm 37 rotates together with the rotation shaft 35.

  The support 38 corresponds to an example of the driven cam body of the present invention.

  In addition, one driven cam of the present invention refers to a configuration of one cam roller guided by one guide groove and a support body standing by the cam roller. In addition, one guide cam of the present invention refers to a configuration of one guide groove that guides one cam roller.

  As shown in FIG. 5, the driven cam 34 according to the first embodiment includes a support body 38 on which a main cam roller 39 stands and a support body 38 on which an auxiliary cam roller 71 stands. Also serves as. That is, the driven cam 34 according to the first embodiment is an example showing the configuration of two driven cams according to the present invention in which one driven cam plate 380 also serves as two driven cam bodies.

  In addition, the guide cam 32 in which the two guide grooves of the main guide groove 33 and the auxiliary guide groove 70 are formed is composed of two guide cams constituted by one plate having the main guide groove and the auxiliary guide groove of the present invention. This is an example.

  The rotation case outer frame 28 is fixedly supported by the rotation shaft 36 at the portion of the rotation shaft support hole 42, and rotates integrally with the rotation shaft 36 as the rotation shaft 36 rotates.

  The guide cam 32 is fixed to the planting transmission case 21 at the fixing hole 43.

  FIG. 7A is a diagram showing a relationship with the driven cam 34 on the plan view of the guide cam 32 according to the first embodiment, and FIG. It is sectional drawing of the driven cam 34 of the state made.

  In FIG. 7A, the shape and posture of the seedling planting tool 27 are represented by a triangle indicated by a broken line with the tip of the seedling planting tool 27 and the center of the rotation shaft 35 as vertices.

  The follower cam 34 fixed to one end of the rotation shaft 35 has the main cam roller 39 guided by the main guide groove 33 when the rotation shaft 35 rotates about the rotation shaft 36 of the rotation case 30, and the auxiliary cam 34. When the cam roller 71 is guided by the auxiliary guide groove 70, the rotation of the rotation shaft 35 around the rotation shaft 35 is controlled.

  In FIG. 8, the locus | trajectory of the front-end | tip of the seedling planting tool 27 at the time of a seedling planting operation | movement is shown.

  Since the rotation shaft 35 is pivotally supported by the rotation case outer frame 28, the rotation shaft 35 rotates so as to draw a circular rotation shaft locus 51 around the rotation shaft 36 as the rotation case 30 rotates.

  The seedling planting tool 27 indicated by a broken line in FIG. 8 indicates the position and posture of the three seedling planting tools 27 at the time of stopping. When the rotating case 30 rotates, the driven cam 34 is guided by the main guide groove 33 and the auxiliary guide groove 70, so that the rotation shaft 35 also rotates about the rotation shaft 35. Therefore, as shown in FIG. The posture of the seedling planting tool 27 also changes depending on the position of the shaft 35.

  When the rotating case 30 rotates, the rotation shaft 35 of the seedling planting tool 27 rotates along the rotation shaft locus 51 and the main cam roller 39 of the driven cam 34 moves along the main guide groove 33, so The auxiliary cam roller 71 of the driven cam 34 moves along the auxiliary guide groove 70 and moves so as to draw the auxiliary cam roller locus 73.

  Since the planting tool arm 37 is fixed to one end of the rotation shaft 35 and the driven cam 34 is fixed to the other end, a line connecting the center of the rotation shaft 35 and the main cam roller 39 is planted. The angle formed by the tool arm 37 is a constant angle at any position of the rotation shaft 35. Similarly, the angle formed between the line connecting the center of the rotation shaft 35 and the auxiliary cam roller 71 and the planting arm 37 is another constant angle at any position of the rotation shaft 35. Accordingly, the main cam roller 39 is guided by the main guide groove 33 and the auxiliary cam roller 71 is guided by the auxiliary guide groove 70, that is, the position of the main cam roller 39 is regulated by the main guide groove 33, and the auxiliary cam roller 70 is regulated by the auxiliary guide groove 70. By restricting the position of 71, the orientation of the planting tool arm 37 can be changed.

  By arranging the main guide groove 33 that draws the main cam roller locus 72 and the auxiliary guide groove 70 that draws the auxiliary cam roller locus 73 with respect to the rotation axis locus 51 shown in FIG. Is rotated as the rotary case 30 rotates, and the driven cam 34 moves while being guided by the main guide groove 33 and the auxiliary guide groove 70, so that the tip of the seedling planting tool 27 is planted. The posture of the seedling planting tool 27 can be changed so as to draw the tool tip locus 50.

  By adjusting the shapes of the main guide groove 33 and the auxiliary guide groove 70, a seedling planting tool tip locus 50 similar to the locus 230 drawn by the tip of the conventional seedling planting tool 204 shown in FIG. 26 is drawn. be able to.

  That is, the trajectory 230 drawn by the tip of the seedling planting tool 204, which has been realized by a complicated gear combination mechanism in the past, is realized by a simple combination structure of the guide cam 32 and the driven cam 34 in the first embodiment. be able to.

  Compared to the conventional complicated gear structure, the cam structure has a simple structure, so it is more maintainable than the conventional one.

  Further, since the rotating case 30 also has a simple structure in which the rotating case outer frame 28 and the rotating case inner frame 29 are coupled by the rotating case coupling screw 31, for example, in the field, the rotating case outer frame 28 is removed to remove the main case. The guide groove 32 can be easily replaced with another guide cam 32 having a different shape, and the seedling planting tool tip locus 50 can be easily changed.

  The seedling planting tool 27 of the first embodiment operates so that the tip of the seedling planting tool tip trajectory 50 is drawn, and scrapes the seedlings on the seedling mounting table 22 while pinching them with the seedling picking nails 40 at the seedling picking port 25. The seedling extrudate 41 is moved back and forth in accordance with the rotational movement of the rotating shaft 35 to push out the seedling held by the seedling picking claws 40 toward the field.

  Next, the configuration of the driven cam 34 and the guide cam 32 of the first embodiment will be described.

  FIG. 9 shows a partially enlarged cross-sectional view of the guide cam of the first embodiment.

  As shown in FIG. 7B, the main cam roller 39 has a longer shape than the auxiliary cam roller 71. As shown in FIG. 9, the main guide groove 33 of the guide cam 32 that guides the main cam roller 39. Is formed in a shape deeper than the auxiliary guide groove 70 for guiding the auxiliary cam roller 71.

  FIGS. 10A to 10C show configuration examples of the main guide groove and the auxiliary guide groove in the guide cam according to the first embodiment. In either case, a perspective view of a portion where the auxiliary guide groove intersects the main guide groove is shown.

  FIG. 10A shows the configuration of the guide cam 32 shown in FIG. 6, and an auxiliary guide groove 70 is formed in the planar portion of the guide cam 32 and the main guide is deeper than the auxiliary guide groove 70. A groove 33 is formed. Since the main guide groove 33 is deeper than the auxiliary guide groove 70, the auxiliary guide groove 70 is interrupted by the main guide groove 33 at the intersecting portion.

  Since the main guide groove 33 is formed deeper than the auxiliary guide groove 70, the main cam roller 39 is always guided by the main guide groove 33 without interruption. The auxiliary cam roller 71 is guided along the auxiliary guide groove 70, but the auxiliary guide groove 70 is interrupted at the intersection with the main guide groove 33, so that the auxiliary cam roller 71 is at the auxiliary guide at the intersection with the main guide groove 33. The contact with the groove 70 is temporarily interrupted.

  FIG. 10B shows a configuration of the guide cam in which the main guide groove and the auxiliary guide groove have different configurations. Instead of forming a groove in the plane portion of the guide cam, the guide guide wall 79 and the auxiliary guide groove wall 80 are formed upright on the plane portion. A main guide groove 75 and an auxiliary guide groove 77 surrounded by are formed. In order to make the auxiliary guide groove 77 shallower than the main guide groove 75, the bottom of the auxiliary guide groove 77 is configured to be higher than the flat portion of the guide cam.

  FIG. 10C shows a configuration of a guide cam in which the configuration of the main guide groove and the auxiliary guide groove is further different. A main guide groove 76 is formed by forming a groove in the planar portion of the guide cam, and an auxiliary guide groove wall 81 is formed, thereby forming an auxiliary guide groove 78 surrounded by the auxiliary guide groove wall 81. Yes. In this case, the bottom portion of the auxiliary guide groove 78 becomes a flat portion of the guide cam.

  Thus, the main guide groove and the auxiliary guide groove having different depths can be formed by forming the groove or the wall with respect to the planar portion of the guide cam.

  Next, the reason why the main cam roller 39 is guided by the main guide groove 33 and the auxiliary cam roller 71 is guided by the auxiliary guide groove 70 in the first embodiment will be described.

  When the rotation shaft 35 makes a round around the rotation shaft 36 due to the shape of the seedling plant tip trajectory 50 drawn on the tip of the seedling planting tool 27, the circumferential direction around the rotation shaft 36 is The relationship between the center position of the main cam roller 39 and the center position of the rotation shaft 35 may be switched between the following state and the preceding state.

  When the main cam roller 39 is only guided by the main guide groove 33 without providing the auxiliary cam roller 71, the relationship between the center position of the main cam roller 39 and the center position of the rotation shaft 35 follows. When the state is switched to the preceding state or when the preceding state is switched to the following state, the operation of the main cam roller 39 becomes unstable, and the rotation direction of the rotation shaft 35 itself around the rotation shaft 35 is reversed. there's a possibility that.

  In the first embodiment, the auxiliary cam roller 71 guided by the auxiliary guide groove 70 is provided separately from the main cam roller 39. Therefore, when the operation of the main cam roller 39 becomes unstable, the auxiliary cam roller 71 performs auxiliary guidance. Since the structure is guided by the groove 70, the rotation direction of the rotation shaft 35 itself around the rotation shaft 35 can be reliably controlled.

  The positions where the main cam roller 39 and the auxiliary cam roller 71 are arranged on the support 38 are arranged so that the center position of the rotation shaft 35, the center position of the main cam roller 39, and the center position of the auxiliary cam roller 71 are not in a straight line. .

  Since a large resistance is applied to the tip of the seedling planting tool 27 when the seedling is taken out from the seedling outlet 25, the seedling planting tool 27 is easily shaken at this time.

  The seedling planting tool 27 of the first embodiment is guided by the two cam rollers of the main cam roller 39 and the auxiliary cam roller 71 and the posture of the seedling planting tool 27 is controlled. Even at the time position, the posture of the seedling planting tool 27 can be stably controlled without rattling. Moreover, the seedling planting posture can be stabilized even during seedling extrusion for planting seedlings.

  In the above-described embodiment, the main guide groove 33 is provided over the entire circumference, and the auxiliary guide groove 70 is provided over the entire circumference. However, the auxiliary guide groove 70 is provided over the entire circumference. Instead, it may be configured to be provided only at a position where the operation of the main cam roller 39 becomes unstable or a position where a large load is applied to the seedling planting tool 27.

  Further, at a position where the operation of the main cam roller 39 becomes unstable or a position where a large load is applied to the seedling planting tool 27, the wall portion of the main guide groove 33 where the main cam roller 39 passes or the auxiliary cam roller 71 A leaf spring member that urges the main cam roller 39 and the auxiliary cam roller 71 so as to be sandwiched between the groove walls on both sides may be attached to the wall portion of the auxiliary guide groove 70 in the passing portion. By setting it as such a structure, the attitude | position of the seedling planting tool 27 can be more stably controlled without rattling.

  The main guide groove 33 is not provided over the entire circumference. For example, the main guide groove 33 is not provided at a position where a large load is not applied to the seedling planting tool 27, and only the auxiliary cam roller 71 is provided at that position. It is good also as a structure guided by the groove | channel 70. FIG. The main guide groove 33 and the auxiliary guide groove 70 may be formed so that at least one of the main cam roller 39 and the auxiliary cam roller 71 is guided at any position of the rotation shaft 35.

  In the embodiment described above, the main cam roller 39 has a longer shape than the auxiliary cam roller 71 and the main guide groove 33 has a deeper shape than the auxiliary guide groove 70. However, the main cam roller 39 has the auxiliary cam roller 71. The main guide groove 33 may have the same depth as the auxiliary guide groove 70.

  Moreover, in this Embodiment 1 mentioned above, although demonstrated using the structure provided with the three seedling planting tools 27 in one rotation case 30, the structure provided with two seedling planting tools with respect to one rotation case It is good also as a structure provided with four or more seedling planting tools.

  Next, the configuration of the cam roller and the guide groove according to the first embodiment will be described.

  In the above-described embodiment, as shown in FIGS. 5 and 7B and the like, the main cam roller 39 and the auxiliary cam roller 71 have a cylindrical shape, and each has a cylindrical center with respect to the support 38. It can be freely rotated as a shaft. Further, as shown in FIG. 9, the main guide groove 33 and the auxiliary guide groove 70 have shapes corresponding to the cylindrical main cam roller 39 and the auxiliary cam roller 71, respectively.

  The configuration of the cam roller and the guide groove may be as follows.

  In FIG. 11, the structure of the front-end | tip part and main guide groove of the main cam roller of another structure is shown. FIG. 11 shows a cross-sectional portion corresponding to the S1-S1 cross section in FIG.

  At the bottom portion of the main guide groove 87 of the guide cam 86, as shown in FIG. 11, a convex portion having a cross section is formed in the longitudinal direction over the entire circumference.

  The main cam roller 85 used at this time is freely rotatable with respect to the support body 38, and the tip end portion 88 has a reverse concave portion corresponding to the concave portion of the bottom portion of the main guide groove 87. Is formed.

  With such a configuration, the cylindrical peripheral portion of the main cam roller 85 moves along the wall portion of the main guide groove 87, and the concave portion of the leading end portion 88 of the main cam roller is at the bottom portion of the main guide groove 87. Since it moves along a convex part, the main cam roller 85 can be moved so that a desired main cam roller locus | trajectory can be drawn correctly. Therefore, the operation of the seedling planting tool 27 can be controlled so that the tip of the seedling planting tool 27 accurately draws a desired seedling planting tool tip locus 50.

  FIG. 12 shows the structure of the tip portion of the main cam roller and the main guide groove of still another structure. FIG. 12 shows a cross-sectional portion corresponding to the S1-S1 cross section in FIG.

  In the bottom portion of the main guide groove 91 of the guide cam 90, as shown in FIG. 12, a recess having an arcuate cross section is formed in the longitudinal direction over the entire circumference.

  The main cam roller 89 used at this time is provided with a rotatable steel spherical member 92 such as a pen tip of a ballpoint pen at its tip, and is biased by a push spring 93.

  The pushing spring 93 corresponds to an example of the spring member of the present invention.

  With such a configuration, the cylindrical peripheral portion of the main cam roller 89 moves along the wall portion of the main guide groove 91, and the spherical member 92 provided at the tip of the main cam roller serves as the main guide groove. The main cam roller 89 can be moved so that the desired main cam roller trajectory can be accurately drawn. Therefore, the operation of the seedling planting tool 27 can be controlled so that the tip of the seedling planting tool 27 accurately draws a desired seedling planting tool tip locus 50.

  FIG. 13A shows the configuration of the tip portion of the main cam roller and the main guide groove of still another configuration. FIG. 13A shows a cross-sectional portion corresponding to the S1-S1 cross section in FIG. FIG. 13B is a schematic plan view showing the relationship between the leading end of the cam roller having this configuration and the guide groove.

  As shown in FIG. 13A, the main guide groove 96 of the guide cam 95 has a cross-sectional shape inclined so that both wall portions spread toward the opening side over the entire circumference.

  The main cam roller 94 used at this time has a cam roller front end member 99 connected to the front end portion thereof by an extrusion spring 98 attached thereto. A plurality of thrust bearings 97 are provided between the front end portion of the main cam roller 94 and the cam roller front end member 99 so that the cam roller front end member 99 can smoothly rotate relative to the main cam roller 94. .

  The cam roller tip member 99 has a shape in which the peripheral portion is inclined so as to correspond to both inclined wall portions of the main guide groove 96. Since the cam roller tip member 99 is connected by the push spring 98, the cam roller tip member 99 is urged toward the bottom side of the main guide groove 96, and the peripheral portion of the cam roller tip member 99 is shown as a contact portion 100 on both walls of the main guide groove 96. Touch any part.

  With this configuration, the peripheral portion of the cam roller tip member 99 moves along the main guide groove 96 while being in contact with both walls of the main guide groove 96, so that a desired main cam roller locus is accurately drawn. The main cam roller 94 can be moved so that Therefore, the operation of the seedling planting tool 27 can be controlled so that the tip of the seedling planting tool 27 accurately draws a desired seedling planting tool tip locus 50.

  FIG. 14 is a schematic plan view showing the configuration of the tip portion of the main cam roller of still another configuration.

  The guide cam shown in FIG. 14 is the above-described guide cam 32, and the main guide groove 33 has a cross-sectional shape as shown in FIG.

  The main cam roller 101 has a cylindrical shape similar to that of the main cam roller 39, and two leaf springs 104 are attached to the peripheral portion thereof. The leaf spring 104 is attached so as to be biased toward the main guide groove walls 105 on both sides of the main guide groove 33.

  With such a configuration, when the main cam roller 101 moves along the main guide groove 33, the two leaf springs 104 are always biased toward the main guide groove walls 105 on both sides. Can be prevented, and the operation of the seedling planting tool 27 can be controlled without rattling.

  In addition, although the structure of the cam roller and guide groove demonstrated in FIGS. 11-14 demonstrated the main cam roller and the main guide groove, the same structure is applicable also to an auxiliary cam roller and an auxiliary guide groove.

  Next, the configuration of the driven cam and the guide groove of the other configuration of the first embodiment will be described.

  FIG. 15A shows a plan view of a guide cam of another configuration according to the first embodiment, and FIG. 15B shows a cross-sectional view of the guide cam and driven cam of the configuration.

  In the driven cam 34 shown in FIG. 7B, the main cam roller 39 and the auxiliary cam roller 71 are erected on the same surface of the support, whereas the driven cam 113 shown in FIG. The auxiliary cam roller 115 is erected on the opposite surface of the erected support.

  The guide cam 110 is formed with a main guide groove 111 for guiding the main cam roller 114, and extends to the outside of the rotation shaft locus 51 on which the rotation shaft 35 moves, and is opposite to the driven cam 113. The auxiliary guide groove 112 for guiding the auxiliary cam roller 115 is formed at the end thereof.

  FIG. 16 shows a positional relationship between the main cam roller 114 and the auxiliary cam roller 115 on the plan view of the guide cam 110. FIG. 16 shows the positions of the main cam roller 114 and the auxiliary cam roller 115 at the positions of the two rotating shafts 35.

  In the case of the guide cam 110 having a configuration in which the auxiliary guide groove 112 is formed by wrapping around from the outside of the driven cam 113, the auxiliary guide groove 112 can be arranged only outside the circumferential region through which the rotation shaft 35 passes. By adjusting the angle formed by the center position of the main cam roller 114 -the center position of the rotation shaft 35 -the center position of the auxiliary cam roller 115, the trajectory through which the auxiliary cam roller 115 passes is rotated as shown in FIG. It can be formed so as to be always outside the circumferential locus drawn by the shaft 35.

  With such a configuration, the main guide groove 111 can be formed without intersecting the auxiliary guide groove 112, and the auxiliary guide groove 112 can be formed over the entire circumference. Therefore, either the main cam roller 114 or the auxiliary cam roller 115 can be formed. In addition, since it can always move along the main guide groove 111 and the auxiliary guide groove 112, the rotation of the rotation shaft 35 itself around the center of the rotation shaft 35 can be controlled more accurately.

  In order to form the trajectory through which the auxiliary cam roller 115 passes so as to be always outside the circumferential trajectory drawn by the rotation shaft 35, the distance between the rotation shaft 35 and the main cam roller 114, the rotation shaft However, in order to reduce the size of the seedling planting device 23, as shown in FIG. 16, the distance between the main cam roller 114 and the auxiliary cam roller 115 can be reduced. It is desirable that the angle formed by the center position−the center position of the rotation shaft 35−the center position of the auxiliary cam roller 115 is adjusted.

  FIG. 17 shows a cross-sectional view of a guide cam 106 having another configuration when the driven cam 113 shown in FIG. 15B is used.

  Instead of the main guide groove 111 of the guide cam 110 shown in FIG. 15B, a main guide wall 107 is formed on the guide cam 106 at the position of the outer wall of the main guide groove 111 with the position of the rotation shaft 36 as a reference. Instead of the auxiliary guide groove 112, an auxiliary guide wall 108 is formed at the position of the inner wall of the auxiliary guide groove 112.

  As the rotation shaft 35 rotates around the rotation shaft 36, the main cam roller 114 moves along the main guide wall 107 and the auxiliary cam roller 115 moves along the auxiliary guide wall 108.

  With such a configuration, it is possible to cause the main cam roller 114 and the auxiliary cam roller 115 to draw the same locus as when the guide cam 110 shown in FIG. 15 is used.

  The guide cam 110 is configured by setting the tolerance of the main guide wall 107 and the auxiliary guide wall 108 to a plus side so as to sandwich the main cam roller 114 and the auxiliary cam roller 115, thereby preventing the seedling planting tool 27 from rattling. be able to.

  FIG. 18 is a cross-sectional view of a guide cam and a driven cam of still another configuration according to the first embodiment.

  In the driven cam 116 shown in FIG. 18, the auxiliary cam roller 118 stands on the opposite surface of the support on which the main cam roller 117 stands, similarly to the driven cam 113 shown in FIG. The angle formed by the center position of the main cam roller 117 -the center position of the rotating shaft 35 -the center position of the auxiliary cam roller 118 is different from that of the driven cam 113, and the auxiliary cam roller 118 has a circumferential shape. It is the structure which draws the locus | trajectory which passes the inner side and the outer side of the rotation axis locus | trajectory 51 of this.

  Therefore, in this case, the auxiliary guide groove cannot be formed over the entire circumference as shown in FIG.

  The configuration shown in FIG. 18 includes two guide cams, a first guide cam 120 and a second guide cam 121.

  The first guide cam 120 is formed with a main guide groove 122 for guiding the main cam roller 117, extends to the outside of the rotation shaft locus 51 on which the rotation shaft 35 moves, and is opposite to the driven cam 116. The first auxiliary guide groove 123 for guiding the auxiliary cam roller 118 is formed at the end thereof. The first auxiliary guide groove 123 is formed only in a portion outside the rotation axis locus 51.

  The second guide cam 121 is formed with a second auxiliary guide groove 124 for guiding the auxiliary cam roller 118. The second auxiliary guide groove 124 is formed only in a portion inside the rotation axis locus 51.

  On the rotation axis locus 51, the guide of the auxiliary cam roller 118 is interrupted, but the auxiliary cam roller 118 is guided by the first auxiliary guide groove 123 outside the rotation axis locus 51 and on the inside of the rotation axis locus 51. Guided by the auxiliary guide groove 124.

  With such a configuration, the auxiliary cam roller 118 can draw a trajectory that intersects the rotation axis trajectory 51.

  FIG. 19 is a cross-sectional view of a guide cam and a driven cam of still another configuration according to the first embodiment.

  In the configuration shown in FIG. 19, two driven cams, a first driven cam 129 and a second driven cam 130, are provided, and a first guide cam 125 and a second guide cam 126 that guide the driven cams 129, 130, respectively. These two guide cams are provided.

  A first driven cam 129 is fixed to one end of the rotating shaft 35, and a second driven cam 130 is fixed to the other end of the rotating shaft 35.

  The first driven cam 129 and the second driven cam 130 correspond to an example of two driven cams in which the driven cam main body is fixed to both ends of the rotating shaft of the present invention.

  Although not shown in FIG. 19, a planting tool arm 37 is fixed to a portion of the rotation shaft 35 between the first driven cam 129 and the second driven cam 130. Therefore, the first driven cam 129 is disposed inside the rotating case 30, whereas the second driven cam 130 is disposed outside the rotating case 30.

  In the first driven cam 129, a main cam roller 131 is erected on the support, and in the second driven cam 130, an auxiliary cam roller 132 is erected on the support.

  The first guide cam 125 disposed inside the rotation case 30 is formed with a main guide groove 127 for guiding the main cam roller 131 of the first driven cam 129 and is disposed outside the rotation case 30. An auxiliary guide groove 128 for guiding the auxiliary cam roller 132 of the second driven cam 130 is formed in the second guide cam 126 fixed to the planting transmission part case 21.

  The main cam roller 131 is guided and moved by the main guide groove 127 and the auxiliary cam roller 132 is guided to the auxiliary guide groove 128 as the rotary shaft 35 rotates about the rotary shaft 36 by the rotation of the rotary case 30. Accordingly, the rotation of the rotation shaft 35 itself around the rotation shaft 35 is controlled, and the operation of the seedling planting tool 27 is controlled.

  With such a configuration, the main guide groove 127 can be formed without intersecting with the auxiliary guide groove 128, and the auxiliary guide groove 128 can be formed over the entire circumference, so that either the main cam roller 131 or the auxiliary cam roller 132 can be formed. In addition, since it can always move along the main guide groove 127 and the auxiliary guide groove 128, the rotation of the rotation shaft 35 itself around the center of the rotation shaft 35 can be controlled more accurately.

  FIG. 20A shows a plan view of a guide cam of another configuration according to the first embodiment, and FIG. 20B shows a side view thereof.

  FIG. 21A shows a bottom view of the guide cam 140 shown in FIG. 20A, and FIGS. 21B and 21C show S2-S2 of the guide cam 140 shown in FIG. 20A, respectively. The cross section and the S3-O-S3 cross section are shown.

  When this guide cam 140 is used, the driven cam 34 shown in FIGS. 5 and 7B is used.

  As shown in FIG. 20A, a main guide groove 141 for guiding the main cam roller 39 of the driven cam 34 is formed in the guide cam 140 over the entire circumference. The guide cam 140 is not formed with an auxiliary guide groove for guiding the auxiliary cam roller 115, and instead, four leaf springs 142 are arranged. The plate spring 142 is fixed to the guide cam 140 by a plate spring fastening portion 143 by welding or the like, and the plate spring holding portion 144 in which a pin is erected can be changed while the plate spring 142 is regulated. .

  As the rotation shaft 35 rotates about the rotation shaft 36 by the rotation of the rotation case 30, the main cam roller 39 is guided and moved by the main guide groove 141, and the auxiliary cam roller 71 is restricted by the leaf spring 142. While moving between the leaf springs 142, the rotation of the rotation shaft 35 itself around the rotation shaft 35 is controlled, and the operation of the seedling planting tool 27 is controlled.

  In this case, the auxiliary cam roller 71 is guided by the leaf spring 142 so as to draw the auxiliary cam roller locus 145.

  Next, the seedling pushing mechanism of the seedling planting tool 27 of the first embodiment will be described.

  FIG. 22 shows a cross-sectional view of the seedling planting tool 27 of the first embodiment.

  FIG. 23A shows a side view of the seedling planter 27 with the seedling planter case 150 removed, and FIG. 23B shows the seedling planter 27 as seen from the rear of the rice transplanter. FIG.

  The seedling planting tool 27 is provided with a bifurcated fork-shaped seedling claw 40 having a sharp tip and a seedling extrudate 41 that projects and retracts below the seedling claw 40.

  An extrusion arm shaft 153 is fixed to a planting tool arm 37 fixed to the rotation shaft 35, and an extrusion arm 151 that can freely rotate with the extrusion arm shaft 153 as a fulcrum is provided. A seedling extrudate 41 is connected to one end of the extrusion arm 151, and the seedling extrudate 41 is configured to move back and forth in accordance with the rotational movement of the extrusion arm 151 with the extrusion arm shaft 153 as a fulcrum. ing.

  An extrusion spring 155 is provided at the rear end of the seedling extrudate 41 to urge the seedling extrudate 41 so as to push it forward.

  On the other hand, as shown in FIG. 23 (b), a ring-shaped push cam 154 is fixed to the rotating case 30 so as to surround a rotating shaft 35 that is rotatable with respect to the rotating case 30. As shown in FIG. 22, a stopper portion 156 having a step is formed around the push cam 154.

  A push arm restricting portion 152, which is the tip of the push arm 151 on the side opposite to the seedling extrudate 41, is disposed so as to contact the peripheral portion of the push cam 154.

  Since the pushing cam 154 is fixed to the rotating case 30, as shown in FIG. 8, when the turning shaft 35 makes a counterclockwise rotation around the turning shaft 36, the pushing cam 154 is attached to the seedling. One rotation is made counterclockwise relative to the tool 27.

  Then, when the seedling planting tool 27 comes to the seedling planting position, the pushing arm restricting portion 152 is configured to pass through the portion of the stopper portion 156 of the pushing cam 154.

  Until reaching the seedling planting position, the radius of the peripheral portion of the push cam 154 with which the push arm restricting portion 152 is in contact gradually increases, so that the seedling extrudate 41 connected to the push arm 151 gradually moves backward. Then, the pushing spring 155 is pushed in.

  Then, when the seedling planting tool 27 reaches the seedling planting position, the pushing arm restricting portion 152 passes through the stopper portion 156, so that the force that has retracted the seedling extrudate 41 is released, and the pushing spring 155 is pushed. As a result, the seedling extrudate 41 is pushed forward and the seedling is planted in the field.

  In FIG. 24, the perspective view of the seedling planting apparatus of the other structure of this Embodiment 1 is shown.

  Fig. 25 (b) shows a side view of the seedling planting device shown in Fig. 24, and Fig. 25 (a) and Fig. 25 (c) are respectively seen from the front of the rice transplanter of this seedling planting device. The front view and the rear view seen from back are shown.

  In the seedling planting apparatus shown in FIG. 24, three rotating shafts 163 rotate on the side surface of the rotating case 160 that rotates around the rotating shaft 161, similarly to the seedling planting apparatus 23 shown in FIGS. The seedling planting tool 162 is fixed to each rotating shaft 163 by a planting tool arm 166.

  An extrusion cam 165 is fixed to the planting transmission case. Therefore, the pushing cam 165 does not rotate with the rotating case 160 when the rotating case 160 rotates.

  On the other hand, a cam follower arm 164 arranged outside the main body of the seedling planting tool 162 is connected to an extrusion arm connected to a seedling extrudate of the seedling planting tool 162. Therefore, in conjunction with the movement of the cam follower arm 164, the seedling extrudate of the seedling planting tool 162 moves back and forth.

  The push cam 165 is arranged so that the tip of the cam follower arm 164 follows along with the contact when the seedling planting tool 162 rotates as the rotary case 160 rotates.

  Further, as shown in FIG. 25B, the push cam 165 has a stopper portion 167, and the distance from the rotation shaft 163 gradually decreases toward the stopper portion 167. ing.

  In FIG. 25 (b), when the rotating case 160 rotates counterclockwise, the cam follower arm 164 whose tip is in contact with the pushing cam 165 moves in a clockwise direction with respect to the rotating shaft 163 toward the stopper 167. Will gradually be added. And when the front-end | tip of the cam follower arm 164 passes through the stopper part 167, the force of the clockwise direction is released, and the seedling extrudate of the seedling planting tool 162 is pushed out forward vigorously.

  As described above, the seedling planting apparatus of the first embodiment can easily change the trajectory drawn by the tip portion of the seedling planting tool only by changing the shape of the guide groove.

  In addition, the structure is simple, not a conventional complicated gear combination, so it is easy to maintain and the locus drawn by the tip of the planting tool can be easily changed by simply replacing the guide cam. it can.

  Moreover, since it has a simple structure, the number of parts is small, and it can be realized at a lower cost than in the past.

  Since the seedling planting device according to the present invention can easily change the trajectory drawn by the tip of the seedling planting tool, it can be used industrially, such as a seedling transplanter such as a riding rice transplanter equipped with a seedling planting device. High nature.

DESCRIPTION OF SYMBOLS 10 Traveling body 11 Engine 12 Front wheel 13 Rear wheel 14 Lifting link apparatus 15 Seedling planting part 16 Driver's seat 17 Steering handle 18 Preliminary seedling mount 19 Transmission 20 Shift lever 21 Planting transmission part case 22 Seedling mount 23 Seedling planting apparatus 24 Float 25 Seedling outlet 26 Marker 27 Seedling planting tool 28 Rotating case outer frame 29 Rotating case inner frame 30 Rotating case 31 Rotating case joint screw 32 Guide cam 33 Main guide groove 34 Drive cam 35 Rotating shaft 36 Rotating shaft 37 Planting Tool arm 38 Support body 39 Main cam roller 40 Seedling picking claw 41 Seedling extrudate 42 Rotating shaft support hole 43 Fixing hole 44, 45 Chain 46, 47, 48 Gear 49 Transmission shaft 50 Seedling tool tip locus 51 Rotating shaft locus 70 Auxiliary guide groove 71 Auxiliary cam roller 72 Main cam roller locus 73 Auxiliary Cam roller locus 75 Main guide groove 76 Main guide groove 77 Auxiliary guide groove 78 Auxiliary guide groove 79 Main guide groove wall 80 Auxiliary guide groove wall 81 Auxiliary guide groove wall 85 Main cam roller 86 Guide cam 87 Main guide groove 88 Main cam groove 88 Tip portion 89 Main cam roller 90 Guide cam 91 Main guide groove 92 Spherical member 93 Push spring 94 Main cam roller 95 Guide cam 96 Main guide groove 97 Thrust bearing 98 Push spring 99 Cam roller tip member 100 Contact portion 101 Main cam roller 104 Leaf spring 105 Main guide Groove wall 106 guide cam 107 main guide wall 108 auxiliary guide wall 110 guide cam 111 main guide groove 112 auxiliary guide groove 113 driven cam 114 main cam roller 115 auxiliary cam roller 116 driven cam 117 main cam roller 118 auxiliary cam roller 1 0 first guide cam 121 second guide cam 122 main guide groove 123 first auxiliary guide groove 124 second auxiliary guide groove 125 first guide cam 126 second guide cam 127 main guide groove 128 auxiliary guide groove 129 first driven cam 130 Second driven cam 131 Main cam roller 132 Auxiliary cam roller 140 Guide cam 141 Main guide groove 142 Leaf spring 143 Leaf spring retaining portion 144 Leaf spring pressing portion 145 Auxiliary cam roller trajectory 150 Seedling planting case 151 Pushing arm 152 Pushing arm restricting portion 153 Pushing Arm shaft 154 Pushing cam 155 Pushing spring 156 Stopper portion 160 Rotating case 161 Rotating shaft 162 Seedling planting tool 163 Rotating shaft 164 Cam follower arm 165 Pushing cam 166 Planting tool arm 167 Stopper unit 380 Followed cam rate

Claims (9)

A seedling planting device for taking seedlings from a seedling mat loaded on a seedling placing stand (22) arranged behind a traveling vehicle body (10) and planting the seedlings on a farm field,
A rotating case (30) rotatably attached to the planting transmission part frame (21);
A planting body (27) rotatably attached to the rotating case (30);
Comprising one or more guide cams (32) fixed to the planting transmission part frame (21);
The planted body (27) includes a planted body (37), a seedling picking claw (40) attached to the planted body (37) and taking the seedling from the seedling mat, and the guide cam (32). ) One or more driven cams (34) guided by
The planted body (27) rotates as the rotating case (30) rotates, and the driven cam (34) moves along the guide cam (32) according to the rotation of the planted body (27). A seedling planting device, characterized in that it is configured to perform. The planting body (27) has a rotating shaft (35) pivotally supported by the rotating case (30),
The driven cam (34) includes a driven cam body (38) and cam rollers (39, 71) attached to the driven cam body (38).
The planted body (37) is fixed to a part of the rotating shaft (35) and the driven cam body (38) is fixed to the other part,
The guide cam (32) has guide grooves (33, 70),
The seedling planting device according to claim 1, wherein the cam roller (39, 71) is guided by the guide groove (33, 70).   A plurality of the driven cams (34) constituted by the driven cam main body (38) and the cam roller (39) are provided, and each driven cam main body (38) serves as one driven cam plate (380). The seedling planting apparatus according to claim 2, wherein each of the cam rollers (39, 71) is attached to the one driven cam plate (380). Two guide cams (32) and two follower cams (34) are provided,
The cam rollers (39, 71) are a main cam roller (39) and an auxiliary cam roller (71), and are attached to the same surface side of the driven cam plate (38),
The two guide cams (32) are, as the guide grooves (33, 70), a main guide groove (33) and an auxiliary guide groove (corresponding to the main cam roller (39) and the auxiliary cam roller (71), respectively. 70) with one plate having
The main cam roller (39) is formed longer than the auxiliary cam roller (71),
Forming the main guide groove (33) deeper than the auxiliary guide groove (70);
The main cam roller (39) is always guided by the main guide groove (33),
The auxiliary cam roller (71) is configured so as not to contact the auxiliary guide groove (70) at a position where the auxiliary guide groove (70) intersects the main guide groove (33). Seedling planting equipment. Two guide cams (32) and two follower cams (34) are provided,
The cam rollers (39, 71) are a main cam roller (39) and an auxiliary cam roller (71), and are attached to the same surface side of the driven cam plate (38),
The two guide cams (32) serve as the guide grooves (33, 70) as main guide grooves (33) and auxiliary guide grooves (70) corresponding to the main cam roller (39) and the auxiliary cam roller (71), respectively. ) With one plate having
The main guide groove (33) and the auxiliary guide groove (70) are configured with the same depth,
The seedling planting device according to claim 3, wherein the main cam roller (39) is always guided by the main guide groove (33). Two guide cams (32) and two follower cams (34) are provided,
The cam rollers (39, 71) are a main cam roller (39) and an auxiliary cam roller (71), and are attached to the same surface side of the driven cam plate (38),
The two guide cams (32) serve as the guide grooves (33, 70) as main guide grooves (33) and auxiliary guide grooves (70) corresponding to the main cam roller (39) and the auxiliary cam roller (71), respectively. ) With one plate having
The main cam roller (39) is always guided by the main guide groove (33),
The position of the auxiliary guide groove (70) corresponds to the position of the auxiliary cam roller (71) at which the operation of at least the main cam roller (39) may become unstable or a load may be applied to the planted body (37). The seedling planting apparatus according to claim 3, wherein the seedling planting apparatus is configured to be formed into a shape.   The seedling according to claim 2, wherein the two driven cams (129, 130) are provided, and the driven cam body (38) is fixed to both ends of the rotating shaft (35). Planting device. Forming a convex portion along the longitudinal direction at the bottom of the guide groove (87);
The seedling planting according to any one of claims 2 to 7, wherein a concave portion for moving the cam roller (85) along the convex portion is formed at a tip (88) of the cam roller (85). apparatus. Forming a recess along the longitudinal direction at the bottom of the guide groove (91);
The driven cam (34) includes a rotatable spherical member (92) that comes into contact with the concave portion at a distal end portion of the cam roller (89), and a spring member that biases the spherical member (92) in a direction in which the spherical member (92) is pressed against the concave portion. The seedling planting device according to any one of claims 2 to 7, wherein the seedling planting device is configured to have (93).

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