JP2021027811A - Perforated plate type multi-row seeder - Google Patents

Abstract

To provide a perforated plate type multi-row seeder capable of simply implementing staggered seeding without using electronic control or auxiliary apparatuses.SOLUTION: A multi-row seeder 1 comprises a plurality of seeding units 20, each of which includes a rotation shaft 30 rotatably pivotally supporting a perforated plate 26, a final bevel gear 31 to which driving force to the rotation shaft 30 is input, an output side bevel gear 29 for outputting driving force to the final bevel gear 31, and a transmission shaft 27 for transmitting driving force to the output side bevel gear 29; a driving shaft 13 for simultaneously transmitting the same driving force to transmission shafts 27, 27, ... of the plurality of seeding units 20, 20, ...; and a driving force extraction unit 10 for extracting driving force to be transmitted to the driving shaft 13. The seeding units 20 comprises a clutch mechanism C enabling switching between an engagement state and a separation state of the final bevel gear 31 and the output side bevel gear 29.SELECTED DRAWING: Figure 5

Description

The present invention relates to a technique of a multi-row sowing machine provided with a plurality of perforated seeding units, and more particularly to a technique for easily enabling staggered sowing by an adjacent perforated seeding unit.

Staggered sowing is known as an effective sowing method for improving the yield of crops such as corn. In staggered sowing, 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 approximately 1/2 of the sowing pitch in the sowing direction. A method of sowing by shifting the distance.

Conventionally used multi-row sowing machines can easily make the sowing pitch of each row uniform, but the sowing positions of adjacent rows are not always staggered, and reliable staggered sowing is possible. Is difficult to realize easily.

Patent Document 1 discloses a configuration including a plurality of sowing boxes and a control unit for controlling the falling timing of seeds in the sowing box as a sowing device for realizing staggered sowing. The sowing apparatus of Patent Document 1 is configured to electronically control the timing of dropping seeds from the sowing box by a control unit when the user specifies staggered sowing.

Further, in Patent Document 2, as a staggered sowing tool for realizing staggered sowing, one input port, two drop ports separated from the input port to the left and right, and two drop ports for seed crops put into the input port. It is disclosed that the guide plate is provided with a guide plate for guiding toward one side, and the guide plate is provided with a drop conduit portion having a configuration in which the guide plate is rotated by the weight of the input seed crop and the guide direction of the seed crop is alternately switched. ..

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

JP-A-2018-046756 JP-A-2015-181442

The present invention has been made in view of the current problems, and provides a perforated multi-row sowing machine capable of easily realizing staggered sowing without using electronic control or auxiliary equipment. The purpose is.

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

That is, in the perforated multi-row seeder according to the present invention, a rotating shaft that rotatably supports the perforated plate, a final gear fixed to the rotating shaft, an output gear that meshes with the final gear, and the above. A plurality of seeding units having a transmission shaft for transmitting driving force to an output gear, a drive shaft interlocked with the transmission shaft of the plurality of seeding units, and a drive force extraction unit for driving the drive shaft A perforated multi-row seeder equipped with, the seeding unit includes a clutch mechanism capable of switching between a meshed state and a separated state of the final gear and the output gear.

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

Further, in the perforated multi-row seeder according to the present invention, the transmission shaft is composed of a first shaft and a second shaft, and has a nested structure in which the second shaft is interpolated inside the first shaft. It has and is configured to be expandable and contractible in the axial direction.

Further, in the perforated multi-row seeder according to the present invention, the transmission shaft has no relative rotation phase between the first shaft and the second shaft on the first shaft or the second shaft. It is provided with a phase adjusting means that can be adjusted in stages.

Further, the perforated multi-row seeding machine according to the present invention includes an urging means for urging the output gear in a direction of meshing with the final gear.

Further, in the perforated multi-row seeder according to the present invention, the output gear is placed at a first position where the output gear and the final gear mesh with each other and a second position where the output gear and the final gear are separated from each other. And, it is provided with a holding means capable of holding in.

As the effect of the present invention, the following effects are exhibited.

According to the perforated multi-row seeding machine according to the present invention, the relative relationship of the rotation phases of the perforated plates between adjacent seeding units can be easily set. As a result, staggered sowing can be easily realized without using electronic control or auxiliary equipment.

Further, according to the perforated multi-row sowing machine according to the present invention, staggered sowing can be easily realized by matching the rotation phases of the perforations using the scale as a clue.

Further, according to the perforated multi-row seeder according to the present invention, the output gear can be easily displaced to a position separated from the final gear.

Further, according to the perforated multi-row seeding machine according to the present invention, the relative relationship of the rotation phases of the perforated plates between adjacent seeding units is ensured without being affected by the meshing position of the final gear and the output gear. Can be adjusted to.

Further, according to the perforated multi-row seeder according to the present invention, the arrangement of the output gear can be easily switched between the meshing position with the final gear and the separation position from the final gear.

Further, according to the perforated multi-row seeder according to the present invention, the output gear can be easily held at the meshing position with the final gear or the separated position from the final gear.

The side view which showed the whole structure of the multi-row seeding machine which concerns on one Embodiment of this invention. The plan view which showed the whole structure of the multi-row seeding machine which concerns on one Embodiment of this invention. A side view showing a driving force extraction unit constituting a multi-row seeder. A side view showing a sowing unit constituting a multi-row seeding machine. A side sectional view showing a clutch mechanism according to the first embodiment. Schematic diagram showing the sowing state by the multi-row sowing machine, (A) the figure showing the staggered sowing state by the multi-row sowing machine according to the embodiment of the present invention, (B) showing the sowing state by the conventional multi-row sowing machine. Figure. A side sectional view showing a clutch mechanism according to a second embodiment. A side sectional view showing a clutch mechanism according to a third embodiment.

First, the overall configuration of the perforated multi-row seeder according to the embodiment of the present invention will be described. As shown in FIGS. 1 to 3, the multi-row seeder 1 which is a perforated multi-row seeder according to an embodiment of the present invention is a seeder used by being attached to the rear part of a tractor (not shown). It is composed of a connecting frame 2, a driving force extraction unit 10, and a plurality of seeding units 20.20.

The connecting frame 2 is supported on the rear portion of a tractor (not shown) so as to be able to move up and down via a work equipment mounting device 3. The connecting frame 2 includes a seeding unit mounting beam 4 extending in a direction orthogonal to the traveling direction of the tractor (not shown). Then, the multi-row seeding machine 1 uses a plurality of (4 in this embodiment) seeding units 20/20/20/20 for seeding in a large number of rows (4 rows in the present embodiment) in the seeding unit mounting beam 4. It is configured to be attached.

The seeding unit mounting beam 4 is composed of a steel pipe having a square cross section. A mounting bracket 21 is mounted on the seeding unit mounting beam 4 for each seeding unit 20 (that is, for each row) as a part of the tip end portion of the seeding unit 20. The main body frame 22 is fixed to the mounting bracket 21.

The driving force extraction unit 10 is a unit for extracting the driving force for rotating the eye plate (the eye plate 26 described later) of each seeding unit 20, and includes a driving force extraction wheel 11 and a chain case 12. The driving force extraction unit 10 includes a driving shaft 13 that simultaneously transmits the same driving force from the driving force extraction unit 10 to the plurality of seeding units 20, 20, 20, and 20.

On the drive shaft 13, four drive bevel gears 14, 14, 14, and 14 corresponding to a total of four seeding units 20, 20, 20, and 20 are fixed. In the driving force extraction unit 10, the power from the driving force extraction wheel 11 is transmitted to the drive shaft 13 via the sprocket and the chain in the chain case 12, and each seeding unit 20 from the drive bevel gears 14, 14, 14, and 14. Power is transmitted to each of the feeding devices 23, 23, 23, and 23 of 20/20/20.

Next, the seeding unit 20 constituting the multi-row seeding machine 1 will be described. As shown in FIGS. 1 to 4, the sowing unit 20 is provided with an eye plate (an eye plate 26, which will be described later) for separating seeds one by one, and seeds are seeded at a predetermined sowing pitch in a row set in the field. It is a unit that can be sown one by one, and is provided with a mounting bracket 21, a main body frame 22, a feeding device 23, a seed hopper 24, a grooving mechanism 25, and the like.

The main body frame 22 is composed of a front frame 22a, a rear frame 22b, an upper link 22c, a lower link 22d, and a support bracket 22e, and the front end of a parallel link mechanism composed of the upper link 22c and the lower link 22d is pivotally supported on the front frame 22a. , The rear end of the upper link 22c and the lower link 22d is pivotally supported by the rear frame 22b. Then, the support bracket 22e extends toward the rear of the rear frame 22b. A feeding device 23 and a grooving mechanism 25 are fixed to the support bracket 22e.

The seeding unit 20 is mounted on the seeding unit mounting beam 4 with the portion of the mounting bracket 21 fitted externally. Further, the seeding unit 20 is configured so that the mounting bracket 21 can be slid to the left and right with respect to the seeding unit mounting beam 4 by loosening the mounting bracket 21, and the spacing between the rows can be adjusted. doing.

The rear frame 22b and the support bracket 22e can be moved up and down in parallel by interposing a parallel link mechanism (upper link 22c and lower link 22d) between the front frame 22a and the rear frame 22b. It is configured in. With such a configuration, the feeding device 23 fixed to the support bracket 22e, the seed hopper 24, the grooving mechanism 25, and the like can be translated up and down.

The grooving mechanism 25 has a disc caller 25a fixed to the support bracket 22e, and a widening portion 25b provided with a backing plate member 25c and a widening member 25d to cover the soil behind the disc caller 25a in the traveling direction. Further, a seed guiding member 25e is provided adjacent to the rear of the widening portion 25b. The seed guiding member 25e is composed of a pair of plate materials arranged so as to face substantially the same width as the maximum width of the widening portion 25b, and a slit through which seeds pass is formed between the plate materials. Behind the seed guiding member 25e, a suppression ring 6 connected to the main body frame 22 via a suppression ring frame 5 is provided.

The disc coalter 25a has a thin disk shape as a whole, and has a sharp cutting edge on the outer peripheral side on the entire outer circumference. When the multi-row sowing machine 1 is pulled, the disc coulter 25a rotates, and the cutting edge on the outer circumference cuts in the direction perpendicular to the ground surface of the field to form a sowing groove. Then, the seeds fed out by the feeding device 23 are dropped one by one into the sowing groove formed by the disc coalter 25a, and the backing plate member 25c covers the soil.

In the perforated plate 26, concave notches 26a, which serve as chambers for separating seeds to be sown one by one, are formed at equal intervals on the outer peripheral edge portion. The perforated plate 26 is locked by a claw portion 30a (see FIG. 4) formed at the end of the rotating shaft 30, and is configured to be removable from the rotating shaft 30. As the perforated plate 26, one having a different size, shape, etc. of the notch portion 26a is 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 a driving force extraction unit 10 is attached in parallel to each seeding unit 20, 20 ..., And a chain and a sprocket wound inside the chain case 12 are provided. As a result, the rotation of the driving force extraction wheel 11 is transmitted to the perforated plate 26 of the feeding device 23.

A seed hopper 24 is provided on the upper part of the feeding 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 sowing groove made by the disc coulter 25a, and are dropped by the backing plate member 25c. It will be covered with soil.

The seeding unit 20 includes 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 be meshable with the final bevel gear 31 fixed to the rotating shaft 30 of the perforated plate 26.

Further, the transmission shaft 27 is formed in a nested structure by an outer cylinder 27a and an inner cylinder 27b, and the inner cylinder 27b is configured to be rotatable in the axial direction inside the outer cylinder 27a, and the transmission shaft 27 is axially displaced. It can be expanded and contracted.

As described above, the transmission shaft 27 constituting the multi-row seeder 1 is composed of the outer cylinder 27a which is the first shaft and the inner cylinder 27b which is the second shaft, and the inner cylinder 27b is inside the outer cylinder 27a. It has a nesting structure to be inserted and is configured to expand and contract in the axial direction. In the multi-row seeder 1, the output side bevel gear 29 can be easily displaced to a position separated from the final bevel gear 31 by such a configuration.

Further, a pair of universal joints 32 and 33 are provided on the transmission shaft 27 on one end side and multiple end sides so as to allow the transmission shaft 27 connecting the drive bevel gear 14 and the final bevel gear 31 to tilt. 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 with each other, the drive shaft 13 rotates and the seeding unit 20 The rotation of the transmission shaft 27 and the rotation of the perforated plate 26 are linked without play.

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

Then, in the multi-row seeder 1, when the clutch mechanism C is “on (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 clutch mechanism C is rotating and the clutch mechanism C is "off (the output side bevel gear 29 and the final bevel gear 31 are separated from each other)", the rotation of the transmission shaft 27 and the rotation of the perforated plate 26 may not be linked. it can.

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

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

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. The transmission shaft 27 is configured to be slidable in the axial direction by the 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 separated from the final bevel gear 31, the transmission shaft 27 slides as shown in the lower figure of FIG. 5, and the output side bevel gear The 29 can be separated from the final bevel gear 31. As a result, the first clutch mechanism C1 can be turned "off". At this time, the rotation shaft 30 and the perforated plate 26 are released from interlocking with the transmission shaft 27, and can be rotated around the rotation shaft 30 regardless of the rotation phase of the transmission shaft 27, and can be set to an arbitrary rotation phase. Can be set.

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

Then, by sowing in a state where the rotation phases of the adjacent eye plates 26 and 26 are shifted by 22.5 °, as shown in FIG. 6 (A), the staggered sowing can be easily performed in the adjacent rows J1 and J2. It can be carried out.

Here, the implementation status of staggered sowing by the multi-row sowing machine 1 will be described. 6 (A) and 6 (B) schematically show the relationship between the rotation phases of the perimeter plates 26 and 26 in the adjacent sowing units 20 and 20 and the sowing status of the seed S. In the perforated plate 26 shown here, eight notches 26a are formed at equal intervals on the outer peripheral edge portion of the perforated plate 26. That is, the perforated plate 26 illustrated here is formed with notches 26a at a pitch of 45 ° with respect to the center of rotation of the perimeter plate 26.

FIG. 6B shows the sowing status of the seed S with respect to the adjacent parallel rows J3 and J4 when the rotation phases of the perforations 26 and 26 in the adjacent sowing units 20 and 20 are the same. There is. In this case, the arrangement of the seeds S sown in 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 seed S is not staggered sowing.

On the other hand, in FIG. 6A, the rotation phases of the perforations 26 and 26 in the adjacent seeding units 20 and 20 are at half the angle of the formation pitch (45 ° in this case) of the notch 26a in the perforations 26. Only (that is, 22.5 °) shows the sowing status of the seed S with respect to the adjacent parallel rows J1 and J2 when the rotation phase is shifted. In this case, the arrangement of the seeds S sown in the adjacent rows J1 and J2 by the adjacent sowing units 20 and 20 is half the sowing pitch L of the seeds S in the adjacent rows J1 when viewed in the direction orthogonal to the sowing direction X. The seed S in the row J2 is arranged at a position deviated by a distance corresponding to the distance (that is, L / 2). That is, in this case, staggered sowing of seed S is realized in Articles J1 and J2.

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

In this embodiment, the case where the notch portion 26a in the perforated plate 26 is formed at a pitch of 45 ° is illustrated, but the notch portion 26a may be formed at a pitch other than 45 °. For example, if the formation pitch of the notch 26a in the perforated plate 26 is 90 °, the rotation phases of the perforated plates 26 and 26 in the adjacent seeding units 20 and 20 can be shifted by half the angle (that is, 45 °). The sowing mode of the seed S by the adjacent sowing units 20 and 20 can be staggered sowing. Any angle may be selected for the formation pitch α ° of the notch portion 26a in the perforated plate 26.

The seeding unit 20 is engraved with a scale M1 at a position indicating a reference rotation phase (rotation angle) around the scale plate 26. Further, in the seeding unit 20, the angle (here, 22.5 °) from the scale M1 to half the formation pitch (here, 45 °) of the notch portion 26a in the scale plate 26 used is around the scale plate 26. The scale M2 is engraved at a position indicating the rotational phase shifted by the amount.

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 notch portion 26a of the perforated plate 26 is set to a rotation phase that matches the scale M1. Further, 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 26a of the scale 26 is rotated to match the scale M2. Set to phase. Then, in the multi-row sowing machine 1, the sowing operation can be easily realized by finally turning on the first clutch mechanisms C1 and C1 of the sowing units 20 and 20 to perform the sowing operation. ..

As described above, the seeding unit 20 constituting the multi-row seeding machine 1 is provided with scales M1 and M2 representing the rotation phases around the rotation shaft 30 of the perforated plate 26. According to such a configuration, staggered sowing can be easily realized by matching the rotation phases of the scales 26 using the scales M1 and M2 as clues.

In this embodiment, the case where the scale M1 and the scale M2 are engraved in the seeding unit 20 is illustrated, but further, assuming the use of the scale plate 26 having a different notch portion 26a formation pitch. , Other scales representing the rotation phase (for example, scale M3 representing the rotation phase 30 °, scale M4 representing the rotation phase 45 °, etc.) may be engraved.

In the embodiment shown in FIG. 5, a collar portion 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 collar portion 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 part of FIG. 5, the urging force of the spring member 37 promptly brings the state shown in the upper part of FIG. 5 and sets the rotation phase of the perforated plate 26. In this state, the output side bevel gear 29 can be easily meshed with the final bevel gear 31.

As described above, the seeding unit 20 constituting the multi-row seeding machine 1 includes a spring member 37 as an urging means for urging 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 to the meshing position with the final bevel gear 31 and the separation 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 where the bevel gears 29 and 31 come into contact, the period from the contact of the bevel gears 29 and 31 to the time when they are settled in the predetermined meshing position. In addition, the rotation phases of the bevel gears 29 and 31 may shift. Therefore, a member capable of steplessly adjusting the relative relationship between the rotation phase of the perforated plate 26 and the rotation phase of the transmission shaft 27, such as a one-way clutch 40, is arranged on a part of the transmission shaft 27. It is preferable to keep it.

For example, as shown in FIG. 5, if a one-way clutch 40 is provided in a part of the inner cylinder 27b constituting the transmission shaft 27, the deviation of the rotational phase caused by the deviation of the meshing positions of the bevel gears 29 and 31 is one-way. It is possible to absorb by the clutch 40 and set the rotation phases of the adjacent eye plates 26 and 26 to be accurately shifted by 22.5 degrees. The one-way clutch 40 may be provided on a part of the outer cylinder 27a constituting the transmission shaft 27.

As described above, the transmission shaft 27 constituting the seeding unit 20 is a phase adjusting means capable of steplessly adjusting the relative rotation phase of the outer cylinder 27a and the inner cylinder 27b on the outer cylinder 27a or the inner cylinder 27b. It is preferable to include the one-way clutch 40. According to such a configuration, the relative relationship of the rotation phases of the respective perforations 26 and 26 between the adjacent seeding units 20 and 20 is maintained without being affected by the meshing position of the final bevel gear 31 and the output side bevel gear 29. It can be surely matched.

Next, FIG. 7 shows the 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 a bearing 35. The transmission shaft 27 is configured to be slidable in the axial direction by the bearing 35.

That is, the second clutch mechanism C2 is composed of a transmission shaft 27 and a tubular body 42 that slidably supports the transmission shaft 27. 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.

The detent mechanism 41 is a mechanism for holding the transmission shaft 27 displaced in the axial direction at a predetermined meshing position P1 and a separation position P2, and is formed on the tubular body 42, the ball latch 43, and the transmission shaft 27. It is composed of a locking groove 44 (first groove 44a and second groove 44b). The tubular body 42 is interposed between the bearing 35 and the transmission shaft 27, and the transmission shaft 27 (more specifically, the inner cylinder 27a) can be slid in the axial direction in the support hole 42a formed in the tubular body 42. Supports. The ball latch 43 is composed of a ball body 43a arranged in a hole 42b formed in the tubular body 42 and an elastic body 43b that urges the ball body 43a in the direction of the transmission shaft 27.

As shown in the upper diagram of FIG. 7, when the output side bevel gear 29 and the final bevel gear 31 are engaged, the first of the pair of locking grooves 44a and 44b formed on the transmission shaft 27, which is far from the output side bevel gear 29. The ball body 43a of the detent mechanism 41 is urged and fitted into the elastic body 43b in the groove 44a. As a result, the transmission shaft 27 is held at a predetermined meshing position P1 in which the output side bevel gear 29 meshes with the final bevel gear 31.

Further, when the user presses the transmission shaft 27 to displace it in the axial direction, the ball body 43a is pressed by the shoulder portion of the first groove 44a and comes out of the first groove 44a, and the transmission shaft 27 is displaced in the axial direction. It will be possible. Then, as shown in the lower diagram of FIG. 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 from each other, the detent mechanism is formed in the second groove 44b near the output side bevel gear 29. The ball body 43a of 41 is configured to be urged and fitted into the elastic body 43b. As a result, the transmission shaft 27 is held at the separation 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 perform the work of rotating the perforated plate 26, and the rotation phase of the perforated plate 26 can be easily set.

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 in which the output side bevel gear 29 is separated from the final bevel gear 31, the output side is as shown in the lower figure of FIG. The bevel gear 29 can be separated from the final bevel gear 31. As a result, the second clutch mechanism C2 can be turned "off". At this time, the rotation shaft 30 and the perforated plate 26 to which the final bevel gear 31 is fixed can be rotated around the rotating shaft 30 regardless of the rotation phase of the transmission shaft 27, and the perforated plate 26 can be set to an arbitrary rotation phase. Can be set.

As described above, 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 are separated from each other. It is provided with a detent mechanism 41 which is a holding means capable of holding at a second position, a separation position P2. According to 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 the separation position P2 from the final bevel gear 31.

Further, FIG. 8 shows a third clutch mechanism C3, which is a 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. Then, in the third clutch mechanism C3, the support stay 34 is configured to be rotatable via the hinge 45, and the output side bevel gear 29 can be separated from the final bevel gear 31 by rotating the transmission shaft 27. It is configured so that it can be done.

That is, the third clutch mechanism C3 is composed of a transmission shaft 27, a support stay 34 that supports the transmission shaft 27, and a hinge 45 that makes the support stay 34 rotatable.

In the third clutch mechanism C3 having such a configuration, when the user rotates the support stay 34 so that the output side bevel gear 29 is separated from the final bevel gear 31 by the output side bevel gear 29, the output side bevel gear 29 is output as shown in the lower figure of FIG. The side bevel gear 29 can be separated from the final bevel gear 31. As a result, the third clutch mechanism C3 can be turned "off". At this time, the rotation shaft 30 and the perforated plate 26 to which the final bevel gear 31 is fixed can be rotated around the rotating shaft 30 regardless of the rotation phase of the transmission shaft 27, and the perforated plate 26 can be set to an arbitrary rotation phase. Can be set.

Then, as shown in the above description, in the multi-row seeder 1 according to the embodiment of the present invention, the rotary shaft 30 for rotatably supporting the perforated plate 26 and the final bevel gear fixed to the rotary shaft 30. A plurality of seeding units 20 having a 31 and an output side bevel gear 29 that meshes with the final bevel gear 31 and a transmission shaft 27 that transmits a driving force to the output side bevel gear 29 are provided, and the transmission shafts 27 of the plurality of seeding units 20 are provided. A perforated multi-row seeder 1 including a drive shaft 13 interlocked and connected and a drive force extraction unit 10 for driving the drive shaft 13, wherein the seeding unit 20 is a final bevel gear 31 and an output side bevel gear. It is provided with a clutch mechanism C (each clutch mechanism C1, C2, C3) capable of switching between the meshed state and the separated state of the 29.

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

The clutch mechanism C may be any mechanism that can switch between the meshed state and the separated state of the final bevel gear 31 and the output side bevel gear 29, and has a configuration other than the clutch mechanisms C1, C2, and C3 shown in the present embodiment. You may adopt the mechanism which is. Further, if the multi-row seeder 1 is provided with a mechanism capable of connecting and disconnecting the driving force between the drive shaft 13 and the rotating shaft 30, the same effect as in the case of providing the clutch mechanism C can be obtained. For example, it may be configured to include a mechanism capable of switching between the meshed state and the separated state of the drive bevel gear 14 and the input side bevel gear 28.

1 Multi-row seeder (dish-type multi-row seeder)
10 Drive force extraction unit 13 Drive shaft 20 Seeding unit 26 Perforated plate 27 Transmission shaft 27a Outer cylinder (first shaft)
27b Inner cylinder (second axis)
29 Output side bevel gear (output gear)
30 Rotating shaft 31 Final bevel gear (final gear)
40 One-way clutch (phase adjustment means)
41 Detent mechanism (holding means)
C Clutch mechanism C1 1st clutch mechanism C2 2nd clutch mechanism C3 3rd clutch mechanism M1 scale M2 scale P1 meshing position P2 separation position

Claims (6)

A rotating shaft that rotatably supports the perforated plate,
The final gear fixed to the rotating shaft and
The output gear that meshes with the final gear and
A transmission shaft that transmits driving force to the output gear,
It is equipped with a plurality of seeding units having
A drive shaft interlocked with the transmission shaft of the plurality of seeding units and
The driving force extraction unit that drives the drive shaft and
It is a perforated multi-row seeder equipped with
The sowing unit
A clutch mechanism capable of switching between the meshed state and the separated state of the final gear and the output gear is provided.
A perforated multi-row seeder characterized by this. The sowing unit
A scale representing the rotation phase of the scale plate around the rotation axis is provided.
The perforated multi-row seeding machine according to claim 1. The transmission shaft
It is composed of the first axis and the second axis.
It has a nested structure in which the second shaft is interpolated inside the first shaft, and is configured to expand and contract in the axial direction.
The perforated multi-row seeding machine according to claim 1 or 2, wherein the seeding machine is characterized by the above. The transmission shaft
On the first axis or on the second axis
A phase adjusting means capable of steplessly adjusting the relative rotation phase of the first axis and the second axis is provided.
The perforated multi-row seeder according to any one of claims 1 to 3, wherein the multi-row seeding machine is characterized by the above. A urging means for urging the output gear in a direction of meshing with the final gear.
The perforated multi-row seeder according to any one of claims 1 to 4, wherein the multi-row seeding machine is characterized by the above. The output gear
The first position where the output gear and the final gear mesh with each other,
A second position where the output gear and the final gear are separated,
Provided a holding means that can be held in
The perforated multi-row seeder according to any one of claims 1 to 4, wherein the multi-row seeding machine is characterized by the above.

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