JP3501655B2 - Seed tape laying method and seed tape laying device - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a seed tape for sowing in which a seed to be germinated is wound around a tape,
The present invention relates to a seed tape laying method and a seed tape laying device for laying on the ground surface.

[0002]

2. Description of the Related Art In the case of paddy fields, it is difficult to directly sow seed fields using seed tapes, so seeds are sown at the seedling cost, and seedlings that have grown to some extent after germination are replanted in the paddy fields. For dry fields (fields), spread seed tape on the ground surface before
The tape is pushed into the soil and buried in the area around the disk. Further, the cutting of the seed tape after the completion of a series of seeding operations was manually performed using a cutter or scissors.

[0003]

[Problems to be Solved by the Invention] Even if one intends to sown seeds efficiently by using seed tapes in paddy fields, simply by letting the tapes out on the ground surface, they may be washed away when water is poured into the fields. It may be blown off before water is added. Moreover, the seeding depth for paddy rice must be constant in shallow soil. This is because if it is too deep, germination will be poor, and if it is exposed on the surface, it will float and fall over easily, and stable germination cannot be obtained.

The seeding depth of paddy rice seeds is ideally about 5 mm, but it is extremely difficult to stably obtain such ideal seeding depth under the uneven and diverse conditions of the paddy field. . However, in the conventional sowing method, it was not possible to arrange the seeds shallowly in the soil and maintain the position for a long time.

In addition, the cutting of the seed tape after the completion of a series of sowing operations is inconvenient because it is necessary to get off the cockpit of the agricultural work vehicle, go to the side of the tape feeding device, and manually cut the seed tape. was there. The purpose of the present invention is to
A seed tape laying method that solves such a problem and can sown paddy rice seeds efficiently in the soil at the optimum depth, and can maintain the position for a long time, and also save labor. And to provide a seed tape laying device.

[0006]

In order to achieve the above object, a seed tape laying method according to the present invention has a rotary shaft that is perpendicular to the traveling direction of a sled of a laying device, and a plurality of pressing plates are provided on the rotary shaft. A laying method of laying the tape by advancing while feeding the seed tape with a tape feeding unit, using a laying device having tape pushing wheels radially arranged around, wherein the tip of the pushing plate is constant from the sled. Depth determining step of fixing the rotating shaft to the device so as to reach the depth, step of feeding the tape while adjusting the feeding amount according to the degree of tension of the seed tape in the tape feeding unit, the tape being advanced by the device. the pressing wheel tip of the pressing plate is deferred sequentially along the ground surface by the driven rotating Shidote Sequentially contacting orthogonal to flop, pressing presses the contact portion of the seed tape to the ground surface
And laying the seed tape by immersing the seed tape locally to a predetermined depth below the ground surface.

[0007] To achieve the above object, the seed tape laying apparatus according to the present invention, apparatus der to lay along the ground surface, the tape moves forward while Eject and Repetitive seed tape
I have perpendicular rotation axis in the traveling direction of warpage of the device, fed a plurality of pressing plates the rotation axis of the tip to be contacted orthogonally on the ground surface and outwardly with respect to the seed tape Tape pressing wheels arranged radially around,
While the seed tape is being fed out,
A tape tension detecting section for detecting the degree, and the tape tension
Of the seed tape based on the output of the degree detection unit
When the tape feeding speed control unit for controlling the speed and the tape pressing wheel rotate and the tip of the pressing plate presses the seed tape against the ground surface, the pressed seed tape is locally below the ground surface. And a wheel support plate for supporting the tape pressing wheel on the sled of the device so as to sink to a predetermined depth.

[0008] In the above apparatus, the tape pressing wheel may be one tip of the plate pressed against the progress of the device is a wheel which is rotated by a passive rotational force received from the ground surface. Further, the near seed tape feeding port in the device, may be configured to include a seed tape cutting unit for cutting the seed tape automatically activated by a switch operation of the apparatus operator.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is an explanatory view (front view) showing an example of arrangement of main parts of a seed tape laying device according to the present invention. FIG. 2 is an enlarged view (front view) showing a part of the device of FIG. 1 in order to show the relationship between the tape pressing wheel, the tape and the ground surface when the seed tape (hereinafter referred to as tape) is laid. Is. 1 and 2 show a set of seed tape laying devices constituting a unit portion of an apparatus towed by an agricultural vehicle. Generally, such a unit portion is A plurality of vehicles are arranged behind the vehicle parallel to the axle.

In FIG. 1, 1 is the ground on which seeds are sown,
2 is a rear wheel of an agricultural vehicle for towing the device, 3 is seeds 4, 4
... A tape wrapping 4 is a unit part of the seed tape laying device according to the present invention. The unit portion 10 of the apparatus includes a tape winding drum 11, a tape feeding unit 12, and a tape pressing wheel 15. Also, 1
Reference numeral 3 is a sled portion that makes the tape evenly adhere to the ground surface while leveling the ground surface and facilitates the forward movement of the apparatus.

As shown in FIGS. 1 and 2, the tape pressing wheel 15 has a drum 52 centered on an axle 51, which is the axis of rotation of the wheel, on a drum 52 with equiangular intervals around it.
A plurality of pressing plates 53 on the same virtual plane as 1 are radially fixed. Pressing plates 53, 53 ... 53
Is almost perpendicular to the ground surface.

As shown in FIG. 1, the tape 3 fed from the drum 11 is introduced into the tape feeding unit 12, changed its direction by the driven roller 21 which rotates freely, and then urged by the drive roller 22. Drive roller 2
It is sent downward from between 2 and the driven roller 23 through a cylindrical guide 27. The guide 27 is for regulating the feeding direction of the tape 3 within a certain range. After that, the tape 3 changes its direction by drawing a curve having a gentle constant tension, and is stretched straight rearward as the apparatus advances, and laid on the ground surface.

In FIG. 2, 5, 5, ...
The tape 3 rolled up is locally pushed down and fixed to the ground 1, and the seeds 4, 4, ...
It is a depression on the ground surface for filling any one of 4 to an appropriate depth below the ground surface. The depression 5 is created by the pressing plate 53 pressing the tape 3 to an appropriate depth below the ground surface as the tape pressing wheel 15 rotates.

Since the tape pressing wheel 15 only has to press the local portion of the tape 3 below the ground surface by the tip of the pressing plate 53, it is not necessary to apply a mechanical rotational force from the outside.
In addition, the cross section of the depression 5 is narrower and sharper in a V shape, so that the tape 3 has a better fixing force to the ground surface. In order to sharpen this V-shape, it is better to rotate the tape pressing wheel 15 only by the passive rotational force received from the ground surface.

The distance between adjacent depressions 5 is almost equal to that of the wheel 1.
5 structure (mounting angle interval between adjacent pressing plates 53 and distance from center to tip). The depth of the depression 5 is determined by the relative positional relationship of the axle 51 with respect to the sled portion 13. This relative position can be changed by vertically moving the fixed position of the sled portion 13 to the wheel support plate 14. In the case of this embodiment, the seed 4 wrapped in the tape 3 has about 5
A group of 3 particles with an interval of mm is arranged at an interval of about 30 mm, and the interval between the depressions 5 is about 40 to 60 mm.
And

The amount of embankment overlying individual seeds 4 has a significant relationship to seed germination. In the case of directly sown paddy rice, germination is likely to be unsuccessful if the position of the seed exceeds about 5 mm below the ground surface, for example, if there is an embankment of about 1 cm above the seed. Therefore, in the case of the present embodiment, the depth of the depression 5 is set to about 8 mm in order to make the seeding depth of the seed 4 in the laid tape close to the ideal seeding depth (5 mm) of paddy rice seeds.

In order to form the recess 5 having an appropriate depth, the rolled tape 3 is laid without rising from the ground surface 1 and is sufficiently fixed at the position of the recess 5 in order to secure the tension of the tape 3 at the time of unwinding. The degree must be appropriate.
FIG. 3 is an explanatory view (perspective view) showing a mechanism for adjusting the feeding tension of the tape 3. However, in FIG.
Only the relevant positions of the main part are shown, and other parts are omitted.

In FIG. 3, reference numeral 20 is a motor for driving the drive roller 22. Reference numeral 24 is a U-shaped floating support portion that rotatably supports the driven roller 23. 20a
Is a deceleration unit of the motor 20. A shaft 22a connects the drive roller 22 and the speed reducer 20a. The floating support portion 24 is composed of opposing support plates 24a and 24b, and a connecting rod 24c that connects the upper ends of these. The support plates 24a and 24b are rotatably supported such that the lower ends of the support plates 24a and 24b sandwich the driven roller 23 therebetween.

Since the connecting rod 24c is pulled by the spring 25 in the direction of the fixing member 26 mounted in the housing 12a of the tape feeding unit 12, the driven roller 23 is always driven by the drive roller 22 at an appropriate pressure. Being pressed against. The tape 3 passes between the driven roller 23 and the drive roller 22 in this state.

28 is a sensor (micro switch) for detecting the tension of the tape 3 near the outlet of the tape feeding unit 12. An L-shaped wire 29 including a vertical portion 29a and a horizontal portion 29b is attached to a movable portion of the micro switch 28. In the free state, the movable portion of the micro switch 28 is biased so that the horizontal portion 29b jumps up.

The tape 3 introduced into the tape feeding unit 12 is urged by the driving roller 22 and fed downward between the driving roller 22 and the driven roller 23.
At this time, in a normal state, the tape 3 is orthogonal to and makes contact with the horizontal portion 29b of the L-shaped wire attached to the microswitch 28. FIG. 4 is an explanatory view (front view) showing the relationship between the operations of the micro switch 28 and the drive roller 22.

In FIG. 4, the horizontal portion 29b of the L-shaped wire 29 attached to the microswitch 28 extends in the back direction at right angles to the paper surface of the drawing and also at right angles to the tape 3 in the drawing. Therefore, the horizontal portion 29b of the wire 29 is
As the tape 3 is fed out, the rubbing pressure of the tape 3 is applied in the right direction in the figure. At this time, if the pressure applied to the horizontal portion 29b from the tape 3 is strong, the L-shaped wire 29
Is rotated clockwise in the figure, and the microswitch 28
To turn on. If this pressure is weak, the micro switch 2
The L-shaped wire 29 is turned counterclockwise in the figure by the repulsive force of the movable part 8 and turned off.

An L-shaped wire 29 shown by the solid line in FIG.
The positions of the tape 3 and the tape 3 are when the micro switch 28 is in the ON state, and the L-shaped wire 29 indicated by the two-dot chain line is shown.
The position of the tape 3 is the case where the microswitch 28 is in the off state. When the micro switch 28 is turned on, a drive current is passed through the motor 20 to rotate the tape 3 in the feeding direction. In the off state, the current supply to the motor 20 is stopped and the rotation is stopped.

When the tension of the tape 3 fed out is too high, the portion of the tape 3 which is sunk below the ground surface by the pressing plate 53 of the tape pressing wheel 15 is pulled in the traveling direction and lifts out of the depression 5. . When the degree of tension is low and it is extreme (when the tape feeding speed is faster than the moving speed of the device), the tape 3 meanders and cannot be laid straight.

However, since the tape 3 already fed out is behind the tape feeding unit 12 while the device towed by the agricultural vehicle is moving forward, the tape 3 is not applied to the drive roller 22 when a rotational force is not applied. Is increased, the state shown by the solid line in FIG. 4 is reached, and the microswitch 28 is turned on. Therefore, the motor 20 rotates in the direction of feeding the tape 3, and the drive roller 22 accelerates the feeding of the tape 3.

Since the speed at which the drive roller 22 feeds the tape 3 is faster than the traveling speed of an ordinary agricultural vehicle, if the micro switch 28 is kept on for a while, the tape 3 will be drawn by the two-dot chain line in FIG. As shown by, the slack occurs, and the horizontal portion 29b of the L-shaped wire 29 bounces up, and
It becomes as shown by the dotted line. Then micro switch 28
Turns off, the drive current of the motor 20 is cut off, and the acceleration of the feeding of the tape 3 is stopped.

However, as the device continues to move forward, the tape 3 is tensioned again and the microswitch 28 is turned on as shown by the solid line.
Is turned on, the rotational force is applied to the motor 20, and the speed at which the tape 3 of the drive roller 22 is fed out is accelerated. The tension state of the tape 3 is kept within an appropriate constant range by repeating the rotation of the motor 20 and the suspension of the rotation by turning the micro switch 28 on and off.

FIG. 5 is an explanatory view (perspective view) showing an arrangement of main parts of a mechanism (a cutter mechanism and its related structure) for automatically cutting the tape 3. 6 to 8 are explanatory views (left side view) showing the operation progress of the main part of FIG. Note that FIG.
The state of corresponds to the state of FIG. In FIG. 5, 30
Is a motor for operating the cutter mechanism. Reference numeral 31 is a flywheel that is rotated by the motor 30 via the speed reducer 30a. Reference numeral 33 is a cutter driving lever for causing the cutter to cut the tape. Cutter drive lever 3
3 is rotatably supported by a pivot shaft 36 fixed to the housing 12a as a fulcrum.

Reference numeral 32 denotes a flywheel 31 and a cutter driving lever 3.
It is a connecting bar that connects the three. Reference numeral 35 is a cutter blade. The cutter driving lever 33 and the cutter blade 35 are fixed to each other through an arm 34 and a blade fixing metal fitting 34a so as to be L-shaped. The flywheel 31 has a pin 3 at the centering position.
1a, the cutter drive lever 33 has a pin 32a at the center, and the connecting bar 32 has one end free to rotate to the flywheel 31 by the pin 31a and the other end freely to rotate to the cutter drive lever 33 by the pin 32a. Is bound to. Therefore, one revolution of the flywheel 31 causes the cutter drive lever 33 to make one reciprocating pendulum motion.

Reference numeral 37 denotes a tape holding lever which supports a tape holding plate 38 for pressing the tape 3 against the tape receiving plate 40 to prevent the tape 3 from being displaced immediately before the cutter blade 35 cuts the tape. The tape receiving plate 40 is fixed in the housing 12a by mounting fittings 40a and 40b. The upper portion of the tape holding lever 37 is also rotatably supported by the rotating shaft 36, and the pendulum movement with the rotating shaft 36 as a fulcrum is possible. The lower end of the tape holding lever 37 is fixed to one end of the tape holding plate 38, and both are L-shaped. Therefore, the cutter blade 35 and the tape pressing plate 38 are parallel to each other.

The tape holding lever 37 has a spring 41.
Thus, the cutter drive lever 33 is urged in the counterclockwise direction in FIGS. 6 to 8. On the other hand, a rotation restraining metal fitting 39 that restricts the tape holding lever 37 from rotating in the counterclockwise direction from the cutter driving lever 33 is fixed to the tape holding lever 37 side. Therefore, while the flywheel 31 is rotated, the tape pressing lever 37 and the cutter driving lever 33 are provided during the transition from the state of FIG. 6 to the state of FIG.
Rotate at the same rotation angle.

By operating a switch on an operation panel (not shown),
When a current flows through the motor 30 and the flywheel 31 starts rotating, the state of FIG. 6 shifts to the state of FIG. 7. After the tape holding plate 38 shown in FIG. 7 sandwiches the tape between them and pushes the tape receiving plate 40, the tape holding plate 38 stops at that position even if the flywheel 31 continues to rotate. Then, the tape 3 is continuously pressed against the tape receiving plate 40 by the bias of the spring 41. on the other hand. Cutter drive lever 3
As shown in FIG. 8, the tape 3 is rotated counterclockwise by the rotational force of the flywheel 31 against the bias of the spring 41 to cut the tape 3.

In the state shown in FIG. 6, the movable portion 42a of the micro switch 42 is pressed against the cutter drive lever 33 and is in the ON state. In this case, the tape feeding operation by the drive roller 22 is possible, but before the state shown in FIG. 7, the movable portion 42a of the micro switch 42 is separated from the cutter drive lever 33 as shown in FIG. Motor 20 for feeding tape
Since the power supply circuit is cut off, the tape 3 is not delivered from the drive roller 22 regardless of the operation of the micro-switch 28 for detecting the tape tension. Therefore, the tape 3 does not become loose and is in a tension state without being loosened.
Since it is pressed to 0, it is surely cut.

When the tape 3 is cut in the state shown in FIG. 8 and the flywheel 31 is further rotated after the tape is cut to return to the state shown in FIG. 6, the micro switch 42 is turned on, whereby the power to the motor 30 is once supplied. Supply is cut off. Therefore, the flywheel 31 completes a series of operations in one rotation, and the tape cutting operation is not started unless a switch operation of the operation panel (not shown) is performed next.

FIG. 9 is a perspective view showing a part of the use state of the seed tape laying device of the present invention in which a plurality of unit parts 10 of the device described with reference to FIGS. 1 to 8 are mounted side by side. . For example, if the tapes 3, 3, ... 3 are laid by a device in which six unit parts of the device are mounted side by side while avoiding the ruts on the rear wheels of the agricultural vehicle, a much wider range than the vehicle width, 6 at the same time by one operation of the vehicle
Strip tape can be laid.

[0036]

As described above, the seed tape laying method according to the present invention has the rotating shaft parallel to the ground surface and perpendicular to the traveling direction of the apparatus, and presses the fed seed tape against the ground surface. A plurality of pressing plates are radially arranged around the rotation axis, and the tape pressing wheels are rotated, whereby the tips of the pressing plates are sequentially pressed against the ground surface orthogonally to the tape and pressed. Since the seed tape is locally submerged to a predetermined depth below the ground surface, paddy rice seeds can be sown efficiently in the soil at the optimum depth for germination, and the position of the seed tape There is an effect that the optimum state can be maintained for a long time without being washed away by pouring water, strong wind, or a large amount of rainwater inflow.

Further, the seed tape laying device according to the present invention has a rotation axis which is parallel to the ground surface and is perpendicular to the traveling direction of the device, and a plurality of seed tapes which come into contact with the fed seed tape at right angles on the ground surface. Of the pressing plate radially arranged around the rotation axis, the tape pressing wheel rotates, when the tip of the pressing plate presses the tape against the ground surface, the tape that is pressed locally By deciding the mounting position of the tape pressing wheel so that it will sink to a predetermined depth below the ground surface, rice seeds can be sown efficiently in the soil at the optimum depth, and the position should be maintained for a long time. The effect is that a device capable of

In the above apparatus, a tape tension detecting unit for detecting the degree of tension of the tape while the tape is being fed, and a tape feeding speed control unit for controlling the tape feeding speed based on the output of the tape tension detecting unit. Since the tape pressing wheel is rotated by the passive rotational force that the pressing plate receives from the ground surface while the device is moving, the tape can be reliably fixed to the ground surface.

In the above-mentioned device, a tape cutting section for automatically operating to cut the tape by a switch operation of the device operator is provided in the vicinity of the tape feeding port in the device. The tape can be cut only by operating the switch on the control panel at the operator's hand, and therefore, the useless work of getting off the cockpit of the agricultural work vehicle and manually cutting it each time can be omitted. effective.

[Brief description of drawings]

FIG. 1 is an explanatory view (front view) showing an example of arrangement of main parts of a seed tape laying device of the present invention.

FIG. 2 is an explanatory view (front view) showing a part of the apparatus of FIG. 1 in an enlarged manner.

FIG. 3 is an explanatory view (perspective view) showing a tape feeding tension adjusting mechanism.

FIG. 4 is an explanatory view (front view) showing the operation of the microswitch of the mechanism of FIG.

FIG. 5 is an explanatory view (perspective view) showing an arrangement of main parts of the tape cutting mechanism.

FIG. 6 is an explanatory diagram (left side view) showing the operation progress of the main part of FIG. 5;

FIG. 7 is an explanatory diagram (left side view) showing the operation progress of the main part of FIG. 5 following FIG. 6;

8 is an explanatory diagram (left side view) showing the operation progress of the main part of FIG. 5 following FIG. 7. FIG.

FIG. 9 is a perspective view showing a usage state of a seed tape laying device in which a plurality of unit parts of the device are mounted side by side.

[Explanation of symbols]

1 ground 2 Rear wheels of agricultural vehicles 3 seed tape 4 seeds 5 Dimples on the ground surface 10 Unit of equipment 11 Tape winding drum 12 Tape feeding unit 13 Sled section 15 Tape pressing wheel 20, 30 motor 21, 23 Driven roller 22 Tape drive roller 28, 42 micro switch 29 L-shaped wire 31 flywheel 32 connecting bar 33 Knuckle drive lever 35 cutter blade 36 rotation axis 37 Tape holding lever 40 tape receiving plate 51 axles 53 Press plate

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A01C ^7/ 00-9/08

Claims (4)

(57) [Claims] 1. A laying device having a tape pressing wheel having a rotating shaft perpendicular to a traveling direction of a sled of the laying device and having a plurality of pressing plates radially arranged around the rotating shaft,
A laying method of laying the tape by advancing the seed tape while feeding it with a tape feeding unit, wherein the depth at which the rotary shaft is fixed to the device so that the tip of the pressing plate reaches a certain depth from the sled. determining step, the step of feeding the tape while adjusting the feeding amount according to the degree of tension of the seed tape in the tape feed unit, proceed by the pressing plate tip ground surface by the tape pressing wheel is driven rotation of the apparatus Along with the seed tape, the contact portions of the seed tape are pressed against the ground surface.
And laying the seed tape by squeezing the seed tape locally to a predetermined depth below the ground surface and laying the seed tape. 2. A device for advancing a seed tape while feeding the seed tape and laying the tape along the ground surface, the device having a rotation axis perpendicular to the direction of advance of the warp of the device, with respect to the fed seed tape. A tape pressing wheel in which a plurality of pressing plates with the tips to be in contact with each other orthogonally on the ground surface are arranged radially around the rotation axis, and the degree of tension of the seed tape is detected while the seed tape is being fed out. A tape tension detecting section, a tape feeding speed control section that controls the feeding speed of the seed tape based on the output of the tape tension detecting section, and the tip of the pressing plate is rotated by the tape pressing wheel. When the seed tape is pressed against the ground surface, the tape pressing wheel is set so that the pressed seed tape locally sinks to a predetermined depth below the ground surface. Seed tape laying device comprising a wheel supporting plate for supporting the warp of the serial device that has been constructed from. 3. The seed tape laying apparatus according to claim 2, wherein the tape pressing wheel is a wheel that is rotated by a passive rotational force received by the tip of the pressing plate from the ground surface while the device is moving. apparatus. 4. A seed tape cutting section, which is automatically operated by a switch operation of a device operator and cuts the seed tape, is provided in the vicinity of the seed tape feeding opening in the device. The seed tape laying device according to claim 2 or claim 3.