JP7264472B2 - Perforated multi-row seeding machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a technique for a multi-row seeder equipped with a plurality of perforated seeding units, and more particularly to a technique for enabling easy staggered seeding by adjacently arranged perforated seeding units.

Staggered sowing is known as an effective sowing method for improving the yield of crops such as corn. Staggered sowing means that when seeds are sown in multiple rows, the sowing pitch in adjacent rows is the same, and the sowing position of seeds in adjacent rows is set to about 1/2 of the sowing pitch in the sowing direction. Refers to a method of sowing by shifting the distance.

Conventionally used multi-row seeders can easily arrange the sowing pitch of each row uniformly, but the sowing positions of adjacent rows are not always staggered, and reliable staggered sowing It is difficult to realize easily.

Patent Literature 1 discloses a configuration including a plurality of seeding boxes and a control section that controls the seed drop timing of the seeding boxes as a seeding device that realizes staggered seeding. In the sowing device of Patent Document 1, when the user designates staggered sowing, the timing of dropping seeds from the sowing box is electronically controlled by the control unit.

Further, Patent Document 2 discloses a staggered sowing device that realizes staggered seeding, which has one input port, two drop ports separated to the left and right from the input port, and two drop ports for seed crops fed into the input port. The guide plate is provided with a guide plate for guiding toward one side of the seed crop, and the guide plate is rotated by the self-weight of the introduced seed crop to alternately switch the guiding direction of the seed crop. .

However, in the configurations of Patent Documents 1 and 2, in order to realize staggered seeding, it is necessary to separately provide equipment such as a control device and a drop conduit, which complicates the configuration of the seeder and increases the cost of the seeder. It is also feared that it will increase.

JP 2018-046756 A JP 2015-181442 A

The present invention has been made in view of such current problems, and provides a perforated plate-type multi-row sowing machine that can easily achieve zigzag seeding without using electronic control or auxiliary equipment. It is intended to

The problems to be solved by the present invention are as described above, and the means for solving the problems will now be described.

That is, a perforated multi-row seeding machine according to the present invention includes: a rotating shaft that rotatably supports a perforating plate; a final gear fixed to the rotating shaft; an output gear that meshes with the final gear; a transmission shaft for transmitting driving force to an output gear; and a drive shaft interlockingly connected to the transmission shaft of the plurality of seeding units; , wherein the seeding unit includes a clutch mechanism capable of switching between an engaged state and a disengaged state between the final gear and the output gear , and the transmission shaft includes a second a phase adjusting means configured by one axis and a second axis and capable of steplessly adjusting a relative rotational phase between the first axis and the second axis on the first axis or the second axis; Be prepared .

Further, in the perforated plate type multi-row seed sowing machine according to the present invention, the seeding unit is provided with a scale representing a rotational phase of the perforated plate around the rotation axis.

Further, in the perforated plate-type multi-row sowing machine according to the present invention, the transmission shaft has a telescopic structure in which the second shaft is inserted inside the first shaft, and is configured to be expandable and contractable in the axial direction. There is.

Moreover, the perforated plate type multi-row seeding machine according to the present invention is provided with biasing means for biasing the output gear in a direction to mesh with the final gear.

Further, in the perforated plate type multi-row seeding machine according to the present invention, the output gear is set to a first position where the output gear and the final gear are engaged, and a second position where the output gear and the final gear are separated. and holding means that can be held in and.

As effects of the present invention, the following effects are obtained.

ADVANTAGE OF THE INVENTION According to the perforated plate type multi-row sowing machine which concerns on this invention, the relative relationship of the rotation phase of the perforated plate between adjacent seeding units can be easily set. As a result, zigzag seeding can be easily achieved without using electronic control, auxiliary equipment, or the like.
Moreover, the relative relationship of the rotational phases of the perforated plates between the adjacent seeding units can be reliably adjusted without being affected by the engagement position of the final gear and the output gear.

Moreover, according to the perforated plate-type multi-row sowing machine according to the present invention, it is possible to easily implement zigzag seeding by adjusting the rotation phase of the perforated plate using the scale as a clue.

Moreover, according to the perforated plate-type multi-row sowing machine according to the present invention, the output gear can be easily displaced to the position spaced apart from the final gear.

Moreover, according to the perforated plate-type multirow seed sowing machine which concerns on this invention, arrangement|positioning of an output gear can be easily switched to the spaced position from the engagement position and the final gear with the final gear.

Moreover, according to the perforated plate-type multi-row seeding machine according to the present invention, the output gear can be easily held at the meshing position with the final gear or the spaced position from the final gear.

BRIEF DESCRIPTION OF THE DRAWINGS The side view which showed the whole structure of the multi-row sowing machine which concerns on one Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The top view which showed the whole structure of the multiple seed sowing machine which concerns on one Embodiment of this invention. The side view which showed the driving force extraction unit which comprises a multi-row seeding machine. The side view which showed the seeding unit which comprises a multi-row seeding machine. FIG. 2 is a side partial cross-sectional view showing the clutch mechanism according to the first embodiment; Schematic diagram showing sowing state by multi-row sowing machine, (A) Diagram showing staggered sowing state by multi-row sowing machine according to one embodiment of the present invention, (B) Seeding state by conventional multi-row sowing machine figure. FIG. 5 is a side partial cross-sectional view showing a clutch mechanism according to a second embodiment; FIG. 8 is a side partial cross-sectional view showing a clutch mechanism according to a third embodiment;

First, the overall configuration of a perforated multi-row seeding machine according to an embodiment of the present invention will be described. As shown in FIGS. 1 to 3, a multi-row seeder 1, which is a perforated plate-type multi-row seeder according to one embodiment of the present invention, is a seeder attached to the rear of a tractor (not shown) and used. , and is composed of a connecting frame 2, a driving force extraction unit 10, and a plurality of seeding units 20, 20, . . . .

The connection frame 2 is supported on the rear part of a tractor (not shown) via a working machine mounting device 3 so as to be able to move up and down. The connection frame 2 includes a seeding unit mounting beam 4 extending in a direction perpendicular to the traveling direction of the tractor (not shown). Then, the multi-row sowing machine 1 has a plurality of (four in this embodiment) sowing units 20, 20, 20, 20 for sowing in a large number of rows (four rows in this embodiment) on the sowing unit mounting beam 4. installed and configured.

The seeding unit mounting beam 4 is composed of a steel pipe with a square cross section. Mounting brackets 21 are attached to the seeding unit mounting beam 4 as part of the tip of the seeding unit 20 for each seeding unit 20 (that is, for each row). A body frame 22 is fixed to the mounting bracket 21 .

The driving force takeout unit 10 is a unit for taking out a driving force for rotating a perforated plate (a perforated plate 26 to be described later) of each seeding unit 20 , and includes a driving force takeout wheel 11 and a chain case 12 . The driving force take-out unit 10 is provided with a drive shaft 13 for simultaneously transmitting the same driving force from the driving force take-out unit 10 to the plurality of seeding units 20.20.20.20.

Four drive bevel gears 14, 14, 14, 14 corresponding to a total of four seeding units 20, 20, 20, 20 are fixed on the drive shaft 13. As shown in FIG. In the driving force take-off unit 10, the power from the driving force take-off wheel 11 is transmitted to the drive shaft 13 via the sprocket and the chain in the chain case 12, and the drive bevel gears 14, 14, 14, 14 to each seeding unit 20. Power is transmitted to each delivery device 23.23.23.23 of 20.20.20.

Next, the seeding unit 20 that constitutes the multi-row seeder 1 will be described. As shown in FIGS. 1 to 4, the sowing unit 20 includes a perforated plate (perforated plate 26, which will be described later) for separating seeds one by one. It is a unit that can sow seeds one by one, and includes a mounting bracket 21, a body frame 22, a delivery device 23, a seed hopper 24, a grooving mechanism 25, and the like.

The body frame 22 comprises a front frame 22a, a rear frame 22b, an upper link 22c, a lower link 22d, and a support bracket 22e. The front end of a parallel link mechanism comprising an upper link 22c and a lower link 22d is pivotally supported on the front frame 22a. The rear ends of the upper link 22c and the lower link 22d are pivotally supported on the rear frame 22b. A support bracket 22e extends rearward from the rear frame 22b. A delivery device 23 and a grooving mechanism 25 are fixed to the support bracket 22e.

The seeding unit 20 is attached to the seeding unit attachment beam 4 in a state in which the mounting bracket 21 is externally fitted. Further, the seeding unit 20 is configured such that by loosening the mounting bracket 21, the mounting bracket 21 can be slid left and right with respect to the seeding unit mounting beam 4, and the spacing between the rows can be adjusted. are doing.

A parallel link mechanism (upper link 22c and lower link 22d) is interposed between the front frame 22a and the rear frame 22b so that the rear frame 22b and the support bracket 22e can move vertically in parallel. is configured to With such a configuration, the feeding device 23, the seed hopper 24, the groove opening mechanism 25, etc. fixed to the support bracket 22e can be vertically moved in parallel.

The grooving mechanism 25 has a disc coulter 25a fixed to the support bracket 22e, and a widened portion 25b provided with a backing plate member 25c serving as a covering plow and a widening member 25d behind the disc coulter 25a in the traveling direction. Further, a seed guide member 25e is provided adjacent to the rear of the widened portion 25b. The seed guide member 25e is composed of a pair of plate members arranged facing each other with a width substantially equal to the maximum width of the widened portion 25b, and a slit through which seeds pass is formed between the plate members. A pressing wheel 6 connected to the body frame 22 via a pressing wheel frame 5 is provided behind the seed guide member 25e.

The disk coulter 25a has a thin disk shape as a whole, and has a sharp cutting edge that is pointed toward the outer circumference over the entire outer circumference. When the multi-row seeder 1 is towed, the disc coulter 25a rotates and cuts the ground surface of the field in the vertical direction with the cutting edge on the outer periphery to form a sowing groove. Then, the seeds delivered by the delivery device 23 are dropped one by one into the sowing grooves formed by the disk coulter 25a, and covered with soil by the pressing plate member 25c.

The perforated plate 26 has recessed cutouts 26a forming chambers for separating seeds to be sown one by one at the outer peripheral edge of the perforated plate 26 at regular intervals. Note that the perforated plate 26 is engaged with a claw portion 30a (see FIG. 4) formed at the end of the rotating shaft 30, and is detachably attached to the rotating shaft 30. As shown in FIG. The perforated plate 26 is prepared so that the cutout portions 26a of different sizes, shapes, etc., are prepared according to the type of seed (crop) to be sown, the size of the seed, and the like.

In the multi-row seeding machine 1, a chain case 12 of the driving force take-out unit 10 is attached parallel to each seeding unit 20, 20 . As a result, the rotation of the driving force output wheel 11 is transmitted to the perforated plate 26 of the delivery device 23 .

A seed hopper 24 is provided above the delivery device 23 via a shutter. The seeds that have fallen from the seed hopper 24 to the feeding device 23 are fed one by one by the perforated plate 26, fall from the slit of the seed guiding member 25e into the seeding groove made by the disc colter 25a, and are then fed by the pressing plate member 25c. covered with soil.

The seeding unit 20 has a transmission shaft 27 for transmitting the rotational output of the drive bevel gear 14 to the perforated plate 26 . An input side bevel gear 28 that meshes with the drive bevel gear 14 is fixed to one end of the transmission shaft 27 , and an output side bevel gear 29 is fixed to the other end of the transmission shaft 27 . The output-side bevel gear 29 is configured to mesh with the final bevel gear 31 fixed to the rotating shaft 30 of the perforated plate 26 .

The transmission shaft 27 has a nested structure with an outer cylinder 27a and an inner cylinder 27b. The inner cylinder 27b is axially displaceable inside the outer cylinder 27a. It is possible to expand and contract to

Thus, the transmission shaft 27 constituting the multi-row seeding machine 1 is composed of the outer cylinder 27a as the first shaft and the inner cylinder 27b as the second shaft. It has a telescoping structure to be inserted and is configured to be expandable and contractable in the axial direction. In the multi-row seeding machine 1 , such a configuration allows the output side bevel gear 29 to be easily displaced to a position spaced apart from the final bevel gear 31 .

Furthermore, a pair of universal joints 32 and 33 are provided on the transmission shaft 27 on one end side and on the other end side, and are configured to allow inclination of the transmission shaft 27 connecting the driving bevel gear 14 and the final bevel gear 31. ing.

In the multi-row seeding machine 1 having such a configuration, when the drive bevel gear 14 and the input side bevel gear 28 and the output side bevel gear 29 and the final bevel gear 31 are meshed, the rotation of the drive shaft 13 and the rotation of each seeding unit 20 Rotation of the transmission shaft 27 and rotation of the perforated plate 26 are interlocked without play.

In the multi-row seeding machine 1 , a clutch mechanism C is provided between the transmission shaft 27 and the perforated plate 26 to release the interlocking state between the rotation shaft 30 and the transmission shaft 27 . In other words, the clutch mechanism C is a mechanism for switching between the engaged state and the separated state of the output side bevel gear 29 and the final bevel gear 31 .

In the multi-row seeding machine 1, when the clutch mechanism C is in the "on" state (the output side bevel gear 29 and the final bevel gear 31 are engaged), the perforated plate 26 is interlocked with the rotation of the transmission shaft 27 without play. When the transmission shaft 27 rotates and the clutch mechanism C is "disengaged (the output side bevel gear 29 and the final bevel gear 31 are separated)", the rotation of the transmission shaft 27 and the rotation of the perforated plate 26 can be prevented from interlocking. can.

Here, the configuration of the clutch mechanism C will be described in more detail. FIG. 5 shows a first clutch mechanism C1, which is the clutch mechanism C according to the first embodiment. The first clutch mechanism C1 is a mechanism that enables switching between a state in which the final bevel gear 31 fixed to the rotation shaft 30 of the perforated plate 26 and the output side bevel gear 29 fixed to the transmission shaft 27 are engaged with each other and a state in which they are separated. is.

The first clutch mechanism C1 is composed of a transmission shaft 27 and a bearing 35 that supports the transmission shaft 27 in a slidable manner.

In the first clutch mechanism C1, as shown in FIG. 5, the transmission shaft 27 is rotatably supported by the support stay 34 via the bearing 35. As shown in FIG. The transmission shaft 27 is slidable in the axial direction by a bearing 35 .

In the first clutch mechanism C1 having such a configuration, when the user presses the output side bevel gear 29 in the axial direction away from the final bevel gear 31, the transmission shaft 27 slides and the output side bevel gear slides as shown in the lower diagram of FIG. 29 can be spaced from the final bevel gear 31 . As a result, the first clutch mechanism C1 can be "disengaged". At this time, the rotation shaft 30 and the perforated plate 26 are disengaged from the transmission shaft 27, and can be rotated around the rotation shaft 30 regardless of the rotation phase of the transmission shaft 27. can be set.

As shown in FIG. 6, the feeding device 23 has scales M1 and M2 engraved on a case 23a (see FIG. 5) around the perforated plate 26. 26 rotation phases can be set. For example, among the adjacent seeding units 20, 20, the perforated plate 26 in the first seeding unit 20 is aligned with the scale M1 indicating the rotational phase of 0°, and the perforated plate 26 in the second seeding unit 20 is It can be adjusted to a scale M2 indicating a rotational phase of 22.5°.

Then, by sowing the seeds with the rotation phases of the adjacent perforated plates 26 and 26 shifted by 22.5°, as shown in FIG. It can be carried out.

Here, the state of implementation of zigzag seeding by the multi-row sowing machine 1 will be described. 6(A) and 6(B) schematically show the relationship between the rotational phases of the perforated plates 26, 26 in the adjacent sowing units 20, 20 and the sowing situation of the seeds S. As shown in FIG. The perforated plate 26 shown here has eight notches 26a formed at regular intervals on the outer peripheral edge of the perforated plate 26 . That is, the perforated plate 26 exemplified here has notch portions 26 a formed at a pitch of 45° with respect to the rotation center of the perforated plate 26 .

FIG. 6(B) shows the sowing state of seeds S on adjacent parallel rows J3 and J4 when the rotational phases of the perforated plates 26 and 26 in the adjacent sowing units 20 and 20 match. there is In this case, the arrangement of the seeds S sown on the adjacent rows J3 and J4 by the adjacent sowing units 20 and 20 is the same when viewed in the direction orthogonal to the sowing direction X. That is, in this case, the sowing mode of the seeds S is not staggered sowing.

On the other hand, in FIG. 6A, the rotation phase of each perforated plate 26 in the adjacent seeding units 20 is set to a half angle of the formation pitch (here, 45°) of the notch 26a in the perforated plate 26. (that is, 22.5°) shows how seeds S are sown on adjacent parallel rows J1 and J2 when the rotation phase is shifted. In this case, the arrangement of the seeds S sown on the adjacent rows J1 and J2 by the adjacent sowing units 20 and 20 is half the sowing pitch L of the seeds S on the row J1 when viewed in the direction orthogonal to the sowing direction X. (ie, L/2). That is, in this case, staggered sowing of seeds S is realized in rows J1 and J2.

That is, when the formation pitch of the notch portions 26a in the perforated plate 26 is α°, the rotation phase of the perforated plates 26 in the adjacent seeding units 20 is set to an angle half the formation pitch α° (that is, α/ 2°), the sowing mode of the seeds S by the adjacent sowing units 20 can be staggered sowing.

In this embodiment, the notch 26a of the perforated plate 26 is formed at a pitch of 45 degrees, but the notch 26a may be formed at a pitch other than 45 degrees. For example, if the formation pitch of the notch portions 26a in the perforated plate 26 is 90°, the rotational phases of the perforated plates 26, 26 in the adjacent seeding units 20, 20 are shifted by half the angle (i.e., 45°). , the sowing mode of the seeds S by the adjacent sowing units 20 can be staggered sowing. An arbitrary angle may be selected for the formation pitch α° of the notch portions 26a in the perforated plate 26. FIG.

In the seeding unit 20, a scale M1 is engraved around the perforated plate 26 at a position indicating a reference rotation phase (rotation angle). In addition, the seeding unit 20 has an angle (here, 22.5°) that is half the formation pitch (here, 45°) of the notch portions 26a in the perforated plate 26 to be used from the scale M1 around the perforated plate 26. A scale M2 is engraved at a position indicating a rotational phase shifted by .

Then, in the multi-row seeding machine 1, the first clutch mechanism C1 of the first seeding unit 20 is set to "OFF", and the rotation phase is set so that the notch 26a of the perforated plate 26 coincides with the scale M1. Furthermore, the first clutch mechanism C1 of the second seeding unit 20 adjacent to the first seeding unit 20 is set to "OFF", and the notch portion 26a of the perforated plate 26 is rotated to coincide with the scale M2. Set to phase. Then, in the multi-row seeding machine 1, the first clutch mechanisms C1 and C1 of the seeding units 20 and 20 are finally set to "on" to perform the seeding operation, thereby easily realizing zigzag seeding. .

Thus, the seeding unit 20 that constitutes the multi-row seeder 1 is provided with scales M1 and M2 representing the rotation phase of the perforated plate 26 around the rotation axis 30 . According to such a configuration, zigzag seeding can be easily realized by adjusting the rotational phase of the perforated plate 26 using the scales M1 and M2 as a clue.

In addition, in this embodiment, the case where the scale M1 and the scale M2 are engraved in the seeding unit 20 is exemplified. , scales representing other rotational phases (for example, a scale M3 representing a rotational phase of 30°, a scale M4 representing a rotational phase of 45°, etc.) may be engraved.

In the embodiment shown in FIG. 5, a flange 36 is provided in the middle of the transmission shaft 27, and a spring member 37 through which the transmission shaft 27 is inserted is arranged between the flange 36 and the support stay 34. there is Therefore, when the user stops pressing the output side bevel gear 29 from the state shown in the lower diagram of FIG. 5, the state shown in the upper diagram of FIG. In this state, the output side bevel gear 29 can be easily meshed with the final bevel gear 31 .

Thus, the seeding unit 20 constituting the multi-row seeding machine 1 is provided with the spring member 37 as biasing means for biasing the output side bevel gear 29 in the direction of meshing with the final bevel gear 31 . According to such a configuration, the arrangement of the output side bevel gear 29 can be easily switched between the meshing position with the final bevel gear 31 and the spaced position from the final bevel gear 31 .

In the seeding unit 20, when the output side bevel gear 29 and the final bevel gear 31 are meshed, depending on the position at which each bevel gear 29/31 contacts, the period from the time when each bevel gear 29/31 contacts to the predetermined meshing position. Moreover, the rotational phases of the bevel gears 29 and 31 may shift. For this reason, a member such as a one-way clutch 40 that can steplessly adjust the relative relationship between the rotational phase of the perforated plate 26 and the rotational phase of the transmission shaft 27 is arranged on a part of the transmission shaft 27. It is preferable to keep

For example, as shown in FIG. 5, if a one-way clutch 40 is provided in a part of the inner cylinder 27b that constitutes the transmission shaft 27, the rotational phase deviation caused by the deviation of the meshing positions of the bevel gears 29 and 31 can be eliminated in a one-way clutch. This is absorbed by the clutch 40, and it becomes possible to set the rotation phases of the adjacent perforated plates 26 to a state in which they are accurately shifted by 22.5 degrees. The one-way clutch 40 may be provided on a part of the outer cylinder 27a forming the transmission shaft 27. As shown in FIG.

In this way, the transmission shaft 27 constituting the seeding unit 20 serves as phase adjustment means capable of steplessly adjusting the relative rotational phase between the outer cylinder 27a and the inner cylinder 27b on the outer cylinder 27a or the inner cylinder 27b. A one-way clutch 40 is preferably provided. According to such a configuration, the relative relationship of the rotational phases of the perforated plates 26 between the adjacent seeding units 20, 20 can be adjusted without being affected by the engagement position of the final bevel gear 31 and the output side bevel gear 29. You can definitely match.

Next, FIG. 7 shows a second clutch mechanism C2, which is the clutch mechanism C according to the second embodiment. In the embodiment shown in FIG. 7, the transmission shaft 27 is rotatably supported by the support stay 34 via the bearing 35 . The transmission shaft 27 is slidable in the axial direction by a bearing 35 .

That is, the second clutch mechanism C2 is composed of the transmission shaft 27 and the cylindrical body 42 that supports the transmission shaft 27 in a slidable manner. The second clutch mechanism C2 is different from the first clutch mechanism C1 in that it includes a detent mechanism 41 instead of the spring member 37. As shown in FIG.

The detent mechanism 41 is a mechanism for holding the axially displaced transmission shaft 27 at a predetermined engagement position P1 and a separation position P2. It is configured by the locking groove 44 (the first groove 44a and the second groove 44b). The cylinder 42 is interposed between the bearing 35 and the transmission shaft 27, and the transmission shaft 27 (more specifically, the inner cylinder 27a) can slide axially in the support hole 42a formed in the cylinder 42. supported by The ball latch 43 is composed of a ball body 43 a arranged in a hole 42 b formed in the cylindrical body 42 and an elastic body 43 b that biases the ball body 43 a toward the transmission shaft 27 .

7, when the output side bevel gear 29 and the final bevel gear 31 are in mesh with each other, the first of the pair of locking grooves 44a and 44b formed in the transmission shaft 27 is farther from the output side bevel gear 29. The ball body 43a of the detent mechanism 41 is fitted into the groove 44a by being biased by the elastic body 43b. As a result, the transmission shaft 27 is held at a predetermined meshing position P<b>1 where the output side bevel gear 29 meshes with the final bevel gear 31 .

Further, when the user presses to displace the transmission shaft 27 in the axial direction, the ball body 43a is pushed by the shoulder portion of the first groove 44a and comes out of the first groove 44a, displacing the transmission shaft 27 in the axial direction. It becomes possible. 7, when the transmission shaft 27 is displaced to a predetermined separation position P2 where the output side bevel gear 29 and the final bevel gear 31 are separated, the second groove 44b close to the output side bevel gear 29 is engaged with the detent mechanism. A ball body 43a of 41 is configured to be fitted in by being biased by an elastic body 43b. As a result, the transmission shaft 27 is held at the separated position P2 where the output side bevel gear 29 is separated from the final bevel gear 31 even if the user releases the transmission shaft 27 . In this state, the user can easily rotate the perforated plate 26 and easily set the rotational phase of the perforated plate 26 .

In the second clutch mechanism C2 having such a configuration, when the user presses the output side bevel gear 29 in the axial direction of the transmission shaft 27 separating the output side bevel gear 29 from the final bevel gear 31, as shown in the lower diagram of FIG. Bevel gear 29 can be spaced apart from final bevel gear 31 . As a result, the second clutch mechanism C2 can be "disengaged". At this time, the rotating shaft 30 to which the final bevel gear 31 is fixed and the perforated plate 26 can be rotated around the rotating shaft 30 regardless of the rotational phase of the transmission shaft 27, and the perforated plate 26 can be rotated at any rotational phase. can be set.

Thus, in the seeding unit 20, the output side bevel gear 29 is separated from the meshing position P1, which is the first position where the output side bevel gear 29 and the final bevel gear 31 mesh, and the output side bevel gear 29 and the final bevel gear 31. A detent mechanism 41 is provided as a holding means that can be held at the separated position P2, which is the second position. With such a configuration, the output side bevel gear 29 can be easily held at the meshing position P1 with the final bevel gear 31 or at the spaced position P2 from the final bevel gear 31 .

Further, FIG. 8 shows a third clutch mechanism C3, which is the clutch mechanism C according to the third embodiment. In the embodiment shown in FIG. 8, the transmission shaft 27 is rotatably supported by the support stay 34 via the bearing 35 . In the third clutch mechanism C3, the support stay 34 is rotatable via the hinge 45, and by rotating the transmission shaft 27, the output side bevel gear 29 can be separated from the final bevel gear 31. configured to allow

That is, the third clutch mechanism C3 is composed of the transmission shaft 27, the support stay 34 that supports the transmission shaft 27, and the hinge 45 that allows the support stay 34 to rotate.

In the third clutch mechanism C3 having such a configuration, when the user rotates the support stay 34 so as to separate the output side bevel gear 29 from the final bevel gear 31, the output as shown in the lower diagram of FIG. The side bevel gear 29 can be spaced apart from the final bevel gear 31 . As a result, the third clutch mechanism C3 can be "disengaged". At this time, the rotating shaft 30 to which the final bevel gear 31 is fixed and the perforated plate 26 can be rotated around the rotating shaft 30 regardless of the rotational phase of the transmission shaft 27, and the perforated plate 26 can be rotated at any rotational phase. can be set.

As described above, the multi-row seeding machine 1 according to one embodiment of the present invention includes a rotating shaft 30 that rotatably supports the perforated plate 26, and a final bevel gear fixed to the rotating shaft 30. 31, an output side bevel gear 29 that meshes with the final bevel gear 31, and a transmission shaft 27 that transmits driving force to the output side bevel gear 29. A perforated plate type multi-row sowing machine 1 including a drive shaft 13 interlocked and connected and a driving force extraction unit 10 for driving the drive shaft 13. The seeding unit 20 includes a final bevel gear 31 and an output side bevel gear. 29 is provided with a clutch mechanism C (each clutch mechanism C1, C2, C3) that can switch between the engaged state and the disengaged state.

According to the perforated multi-row sowing machine 1 having such a configuration, it is possible to easily set the relative relationship of the rotation phases of the perforated plates 26 between the adjacent seeding units 20 and 20 . As a result, zigzag seeding can be easily achieved without using electronic control, auxiliary equipment, or the like.

The clutch mechanism C may be any mechanism that can switch between the engaged state and the separated state of the final bevel gear 31 and the output side bevel gear 29. A mechanism may be employed. Further, if the multi-row seeding machine 1 is provided with a mechanism that enables connection and disconnection of the driving force between the drive shaft 13 and the rotary shaft 30, the same effects as in the case of providing the clutch mechanism C can be obtained. For example, a configuration may be provided with a mechanism that enables switching between the engaged state and the separated state of the drive bevel gear 14 and the input side bevel gear 28 .

1 Multi-row seeder (perforated multi-row seeder)
REFERENCE SIGNS LIST 10 drive force output unit 13 drive shaft 20 seeding unit 26 perforated plate 27 transmission shaft 27a outer cylinder (first shaft)
27b inner cylinder (second shaft)
29 Output side bevel gear (output gear)
30 rotary shaft 31 final bevel gear (final gear)
40 one-way clutch (phase adjusting means)
41 detent mechanism (holding means)
C Clutch Mechanism C1 First Clutch Mechanism C2 Second Clutch Mechanism C3 Third Clutch Mechanism M1 Scale M2 Scale P1 Engaging Position P2 Disengaging Position

Claims (5)

a rotating shaft that rotatably supports the perforated plate;
a final gear fixed to the rotating shaft;
an output gear meshing with the final gear;
a transmission shaft that transmits driving force to the output gear;
With a plurality of seeding units having
a drive shaft interlockingly connected to the transmission shafts of the plurality of seeding units;
a driving force output unit that drives the drive shaft;
A perforated multi-row seeding machine comprising
The seeding unit comprises:
a clutch mechanism capable of switching between a state of engagement and a state of separation between the final gear and the output gear ;
The transmission shaft is
composed of a first shaft and a second shaft,
on the first axis or on the second axis,
A phase adjustment means capable of steplessly adjusting the relative rotational phase of the first axis and the second axis ,
A perforated multi-row seeding machine characterized by: The seeding unit comprises:
A scale indicating the rotation phase of the perforated plate around the rotation axis,
The perforated multi-row seeding machine according to claim 1, characterized in that: The transmission shaft is
having a nested structure in which the second shaft is inserted inside the first shaft, and is configured to be expandable and contractable in the axial direction;
The perforated plate type multi-row seeding machine according to claim 1 or 2, characterized in that: biasing means for biasing the output gear in a direction to mesh with the final gear;
The perforated plate type multi-row sowing machine according to any one of claims 1 to 3 , characterized in that: the output gear,
a first position where the output gear and the final gear mesh;
a second position where the output gear and the final gear are spaced apart;
4. The perforated multi-row seeding machine according to any one of claims 1 to 3 , further comprising holding means capable of holding the seed at the perforated plate type multi-row sowing machine.

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