JPH0233446Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a spot sowing device for a direct sowing machine in flooded soil.

<Prior Art> There is a direct sowing machine in flooded soil in which seeds from a seed tank are intermittently fed out by a feeding device and directly sown into flooded soil via a sowing chute. Since this type of direct sowing machine is used in paddy fields, the seed tank and feeding device are placed upward and the sowing chute is lengthened to avoid splashing of muddy water and the like. Therefore, even if seeds are fed out intermittently by a feeding device, as they fall through a long sowing chute, the seeds before and after the intermittently fed out mix up due to variations, and are sown almost continuously. This causes problems such as ventilation during growth.

<Problems to be solved by the invention> As a point-seeding device to solve this problem, for example, as disclosed in Japanese Utility Model Publication No. 59-3696, a shutter is provided at the lower end of the seeding chute so that it can be opened and closed. It is conceivable to adopt a method that allows seeds to be sown without being affected by variations during falling.
However, since the shutter in this case opens and closes depending on the weight of the seeds, there is a lack of reliability, and it is difficult to always sow at a constant pitch.

<Means for Solving the Problems> The present invention has been provided for the purpose of solving such conventional problems, and as a specific means for that purpose, the feeding roll 15 of the feeding device 13 is In a direct sowing machine in flooded soil that directly sows seeds A that are intermittently fed out into flooded soil via a sowing chute 18, the seed A that falls intermittently is once received near the lower end of the sowing chute 18. A shutter 27 for stopping and dropping the paper is provided so as to be openable and closable via a shutter shaft 26, and a cam plate 36 is provided on the drive shaft 17 of the delivery roll 15.
One longitudinal end of the operating arm 34 is pivotally supported on the direct seeding machine main body side, and the operating arm 34 has an engaging portion 40 that engages with the cam portion 36a of the cam plate 36 in order to operate in conjunction with the feeding device 13. The operating arm 34 is provided with a plurality of adjustment holes 37 in the longitudinal direction, one end of the opening/closing lever 33 in the longitudinal direction is fixed to the shutter shaft 26, and the opening/closing lever 33 is provided with a plurality of adjustment holes 32 in the longitudinal direction. In order to open and close the shutter 27 in synchronization with the feeding operation of the shutter 13, the operating arm 34 and the opening/closing lever 33 are interlocked and connected to each other by an interlocking rod 38 that is selectively engaged with the adjustment holes 37 and 32, respectively. The rod 38 has a turnbuckle 39 for adjusting expansion and contraction in the middle part in the longitudinal direction.
It is equipped with the following.

<Operation> The seeds intermittently fed out by the feeding device 13 fall through the sowing chute 18. On the other hand, the feeding device 1
The cam plate 36 is rotated together with the feed roll 15 of No. 3, and the rotation of the cam plate 36 causes the engaging portion 40 of the actuating arm 34 to move relatively along the cam portion 36a, where the actuating arm 34 is attached to the pivot portion. The interlocking rod 38 is actuated by the operation of the actuating arm 34.
The opening/closing lever 33 is operated via the opening/closing lever 33, and the shutter 27 at the lower end of the seeding chute 18 opens and closes in synchronization with the operation of the opening/closing lever 33. Therefore, the seeds A falling from the sowing chute 18 are sent to the shutter 27.
Once the seed is caught by the seed, it will fall, allowing the seed A to be sown.

In addition, the operating arm 34 has a plurality of adjustment holes 3 in the longitudinal direction.
7 is provided, and the opening/closing lever 33 is provided with a plurality of adjustment holes 32 in the longitudinal direction, one end of the interlocking rod 38 is engaged with one of the adjustment holes 37 of the actuating arm 34, and the other end of the opening/closing lever 33 is By engaging one of the adjustment holes 32, the actuating arm 3
4 and the opening/closing lever 33 are interlocked with each other, and each adjustment hole 37, into which the interlocking rod 38 is engaged,
32, the mutual link ratio can be changed, the amount of operation of the opening/closing lever 33 can be changed, and the amount of opening/closing of the shutter 27 can be adjusted. At this time, the turnbuckle 39 allows the interlocking rod 3 to match the distance between the adjustment holes 37 and 32.
8. Just adjust the length by expanding or contracting it.

<Embodiment> Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In Figs. 2 to 4, reference numeral 1 denotes an aircraft body equipped with an engine, etc., and drive wheels 3 are provided on both sides via transmission cases 2. It is being A support frame 4 projects rearward from the body 1, and a handle 5 is provided at the rear end via an upwardly curved portion.
6 is a main float, which is arranged on the lower side of the fuselage 1. Reference numeral 7 denotes a transmission case, which is supported by the frame 4 by a support shaft 8. The transmission case 7 is provided with a pair of upper and lower tool bars 9 and 10 that extend left and right, and the upper tool bar 9 is provided with a seed tank 1.
1. The lower toolbar 10 has a seeding float 12
A pair are provided on each side.

The seed tank 11 has a feeding device 13 on the lower side. As shown in FIG. 1, the feeding device 13 includes a feeding roll 15 that is rotatably provided at the lower part of the seed tank 11 and has a recess 14 formed on the outer periphery. It is formed in an arc shape along the circumferential surface of the roll, and is configured to intermittently feed out the seeds A in the seed tank 11 downward. A drive shaft 17 mounted on the transmission case 7 is inserted through the left and right delivery rolls 15, and the delivery roll 15 is rotationally driven by the drive shaft 17. There is a seeding chute 1 on the lower side of the feeding device 13.
8 is provided. The sowing chute 18 has a bifurcated branch part 19 on the lower side, and is configured to guide the intermittently fed seeds A into each branch part 19 in two for sowing.

The seeding float 12 is pivotally connected via a pivot 21 to a link 20 fixed to the lower tool bar 10. A notch 22 is formed in the left and right sides of the seeding float 12 so as to be recessed from the rear side, and a furrower 23 and a soil covering member 24 are provided in the front and rear corresponding to the notch 22, and a groove cutter 23 and a soil covering member 24 are provided in the front and rear in correspondence with the notch 22. A seeding guide plate 25 is provided in the section. The seeding guide plates 25 are U-shaped in plan view as shown in FIGS. 5 and 6, and are attached to both ends of a horizontal support rod 20A fixed to the link 20, respectively. Then, a seeding chute 1 is placed on each seeding guide plate 25.
The lower ends of each branch part 19 of 8 are connected to each other. Inside each sowing guide plate 25, a shutter 27 is installed on a horizontal shutter shaft 2 for once catching the seeds A falling intermittently in the branching part 19 and then letting them fall.
6 so that it can be opened and closed freely.

As shown in FIGS. 5 and 6, the shutter 27 has a shutter plate 28 made of a rigid plate such as a metal plate.
and an elastic plate 29 such as a rubber plate attached to the lower or upper side of the shutter plate 28. The elastic plate 29 is made to protrude further toward the distal end than the shutter plate 27, and a plurality of slits 30 in the width direction are inserted into the protruding end thereof from the distal end side. Therefore, a plurality of protrusions 31 partitioned by slits 30 are formed at the tip of the elastic plate 29, and these protrusions 31 are connected to the receiving wall 25a of the sowing guide plate 25.
It comes into contact with elastically. The shutter shaft 26 connects the shutters 27 in the left and right seeding guide plates 25 together, is rotatably inserted through the link 20, and has a plurality of adjustment holes 32 on the tip side in the middle. Opening/closing lever 33
is provided.

34 is an operating arm, as shown in FIGS. 1, 7, and 8.
As shown in the figure, there is a pivot 3 on one side of the seed tank 11.
This operating arm 3 is pivotably supported at 5 so as to be vertically swingable.
4 extends forward through the cam plate 36 of the drive shaft 17. The actuating arm 34 has a plurality of adjustment holes 37 on the tip side, and is interlocked and connected to the opening/closing lever 33 via an interlocking rod 38 inserted into the appropriate adjusting hole 37 and the appropriate adjusting hole 32 of the opening/closing lever 33. There is. A turnbuckle 39 for adjusting expansion and contraction is provided in the middle in the longitudinal direction. The cam plate 36 has, on its outer periphery, uneven cam portions 36 a of the same number as the concave portions 14 of the feed roll 15 , and the cam portions 36 a engage the cam driven roller 40 as an engaging portion provided on the operating arm 34 . The operating arm 34 is designed to swing up and down. Therefore, shutter 27
cam plate 36, operating arm 34, interlocking rod 3
8. It can be opened and closed in synchronization with the feeding operation of the feeding device 13 via the opening/closing lever 33 and the like. Cam plate 36
As shown in FIG. 9, it has a long hole 41 in the circumferential direction, and a screw 42 inserted through the long hole 41 allows
It is rotatably attached to a boss portion 43 fixed to the drive shaft 17. 44 is a tension spring that urges the operating arm 34 downward. 46 is a cover plate of the seeding guide plate 25.

In the above configuration, during sowing, the feed roll 15 is rotated in the direction of the arrow a in FIG. It will be released intermittently one after another. The delivered seeds A fall in groups of several grains at a time while being guided downward through the branching part 19 of the sowing chute 18. On the other hand, drive shaft 1
7 rotates, the operating arm 34 repeatedly moves up and down around the pivot shaft 35 by the cam portion 36a of the cam plate 36, and the shutter 27 opens and closes around the shutter shaft 26 via the interlocking rod 38 and the opening/closing lever 33. Repeat. The opening and closing of this shutter 27 is
Since the shutter 27 is synchronized with the feeding operation of the feeding roll 15 and is provided at a position that takes into account the falling time of the seeds A, the shutter 27 is in a closed state when the seeds A reach the shutter position.
This will temporarily catch the falling seeds A. and,
During the next downward opening operation of the shutter 27, the seeds A are dropped all together and are sown into the grooves 45 formed by the groove cutter 23. Therefore, there is no variation among the seeds A in a group, and the seeds A fed out before and after each other do not mix with each other, and a predetermined number of seeds can be sown at a time.

Shutters 27 are provided at both ends of the shutter shaft 26 so that the left and right shutters 27 open and close at the same time.
9, even if there are variations in the mounting angles of both shutters 27, the shutters 27 can be completely closed by deforming the elastic plate 29. In other words, even if there are variations in the closing angle, it can be closed reliably. Furthermore, even if the seed A gets caught between the elastic plate 29 and the receiving wall 25a for some reason, the tip of the elastic plate 29 is divided into a plurality of protrusions 31 by the slit 30, so that the seed A can be caught between the elastic plate 29 and the receiving wall 25a. The protrusion 31 corresponding to the seed A is largely elastically deformed and can be closed by the protrusion 31 of the other part.
It will not spill downwards.

The timing of the feeding operation of the feeding device 13 and the opening/closing operation of the shutter 27 is controlled by adjusting the rotation of the cam plate 36. That is, since the cam plate 36 can be rotated within the range of the elongated hole 41 relative to the boss portion 43, it can be rotated and fixed at an appropriate position with the screw 42.

The opening/closing amount of the shutter 27 needs to be appropriately adjusted depending on various conditions such as the coating form of the oxygen supply agent on the seeds A, the coating amount, the size of the seed grains, or the running speed. Therefore, in this case, the engagement position of the interlocking rod 38 with respect to the adjustment hole 37 of the actuating arm 34 and the adjustment hole 32 of the opening/closing lever 33 may be appropriately selected and the mutual link ratio may be changed. It has a structure in which adjustment is made by changing the ratio, and a large adjustment margin for the opening/closing amount of the shutter 27 can be secured. Of course, this may be done on either or both of the operating arm 34 side and the opening/closing lever 33 side, and the length of the interlocking rod 38 at this time can be optimally adjusted by adjusting the turnbuckle 39. can.

In the embodiment, the shutter 27 is provided within the seeding guide plate 25, but it may be provided near the lower end of the seeding chute 18, and therefore may be provided within the seeding chute 18. The shutter shaft 26 may connect the left and right seeding floats 12 together as shown in FIG.

<Effects of the invention> According to the invention, the shutter provided near the lower end of the seeding chute 18 is connected to the feeding operation of the feeding device 13 via the cam plate 36, the operating arm 34, the interlocking rod 38, and the opening/closing lever 33. The shutter 27 opens and closes the seeds A intermittently by opening and closing them in synchronization.
Since the seeds are caught once and then dropped, even if there are variations in the seeds while they are falling,
Seeds can be sown while aligning with the shutter 27, and spot sowing is possible even when the feeding device 13 is located above. Further, the actuation arm 34 is provided with a plurality of adjustment holes 37 in the longitudinal direction, and the opening/closing lever 33 is also provided with a plurality of adjustment holes 32 in the longitudinal direction.
2 as appropriate to engage the interlocking rod 38,
It has a structure in which the operating arm 34 and the opening/closing lever 33 are interlocked and connected, and by changing the engagement position of the interlocking rod 38 with respect to each adjustment hole 37, 32 and changing the mutual link ratio, the opening/closing amount of the shutter 27 can be easily adjusted. It can be adjusted, and a large adjustment allowance can be secured, ensuring the optimal opening/closing amount of the shutter 27 according to various conditions such as the powder coating form of the oxygen supply agent of the seeds A, the coating amount, the size of the seed grain, or the running speed. can. Further, during the adjustment, there is an advantage that the length of the interlocking rod 38 can be adjusted optimally by adjusting the expansion and contraction of the turnbuckle 39.

[Brief explanation of the drawing]

The drawings illustrate one embodiment of the present invention, in which Fig. 1 is a cutaway side view of the main parts, Fig. 2 is a side view of the whole, Fig. 3 is a plan view of the seeding float, and Fig. 4 is a plan view of the seeding float.
5 is a cross-sectional side view of the shutter portion, FIG. 6 is a cross-sectional plan view of the same, FIG. 7 is a plan view of the operating arm portion, FIG. 8 is a cross-sectional rear view of the same, and FIG.
The figure is a cross-sectional rear view of the cam plate portion. 11... Seed tank, 12... Seeding float,
13... Feeding device, 15... Feeding roll, 18...
... Seeding chute, 19 ... Branch, 25 ... Seeding guide plate, 26 ... Shutter shaft, 27 ... Shutter, 28 ... Shutter plate, 29 ... Elastic plate, 30 ... Slit, 34 ... Actuation arm ,3
6...Cam plate, 38...Interlocking rod.

Claims (1)

[Scope of utility model registration request] In a direct sowing machine in flooded soil that directly sows seeds A that are intermittently fed out by a feed roll 15 of a feed device 13 into flooded soil via a sowing chute 18, seed A is intermittently sown near the lower end of the sowing chute 18. A shutter 27 for once catching the falling seeds A and then dropping them is provided so as to be openable and closable via a shutter shaft 26, a cam plate 36 is provided on the drive shaft 17 of the feed roll 15, and one end in the longitudinal direction of the operating arm 34 is provided. The operating arm 3 is pivoted on the side of the direct seeding machine main body and operates in conjunction with the feeding device 13.
4 includes an engaging portion 40 that engages with the cam portion 36a of the cam plate 36, a plurality of adjustment holes 37 in the longitudinal direction are provided in the actuating arm 34, and one longitudinal end of the opening/closing lever 33 is fixed to the shutter shaft 26. The opening/closing lever 33 is provided with a plurality of adjusting holes 32 in the longitudinal direction, and the operating arm 34 and the opening/closing lever 33 are provided with a plurality of adjusting holes 32 in the longitudinal direction, so that the shutter 27 is opened and closed in synchronization with the feeding operation of the feeding device 13. A dot seeding device for a direct seeding machine in flooded soil, characterized in that they are interlocked and connected to each other by interlocking rods 38 that are selectively engaged with each other, and the interlocking rods 38 are provided with an expansion/contraction adjustment turnbuckle 39 at a midway portion in the longitudinal direction.