JPH064B2 - Point-seeding device for submerged direct sowing machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a point sowing device in a submerged direct soil sowing machine.

(Prior Art) A seed directly in a submerged soil, in which seeds in a seed tank are intermittently delivered by a delivery device and the seeds are directly sown into the submerged soil through a sowing chute, for example, in Japanese Utility Model Laid-Open No. 56-10313.
It has already been proposed and is being put to practical use in Japanese Patent Publication No.

Since this type of direct seeding machine is used in paddy fields, it is necessary to avoid scattering of muddy water etc., so that the seed tank and the feeding device are placed above and the seeding chute is lengthened to guide the seeds to near the soil surface. ing.

However, in this case, since a long seeding chute is used, even if several seeds are intermittently fed out by the feeding device, while the long seeding chute is dropped, the seeds fed before and after the fitting fall speed. It was very difficult to sow seeds because the seeds shoot into the submerged soil continuously or almost continuously from the lower end of the sowing chute due to the variation of each other.

Therefore, it is considered that a seeding shutter is provided at the lower end of the seeding chute and the seeding is performed by opening and closing the seedling shutter.

According to this, the influence due to the variation of the dropping speed is almost eliminated, and the spot seeding performance is remarkably improved.

(Problems to be solved by the invention) However, since the distance between the feeding device and the point-seeding shutter is too long in this case, when the seeding work is stopped, all the seeds being fed and falling are accumulated in the point-seeding shutter. , They may be sown as one strain when the sowing work is restarted. Further, even if it is restarted, it takes a long time for the delivered seeds to reach the point sowing shutter, and there is a drawback that about 2 to 3 strains become missing after the restart.

(Means for Solving Problems) The present invention is provided for the purpose of solving such conventional problems, and as a concrete means therefor, it is fed by the feeding device 14. In a submerged soil direct sowing machine equipped with a point sowing shutter 28 at the lower end of a sowing chute 21 for guiding the seed A, in the intermediate part between the feeding device 14 of the sowing chute 21 and the point sowing shutter 28, which is opened at the start of sowing and sowing A staying shutter 37 that closes when stopped is provided.

(Operation) The seed A intermittently delivered by the delivery device 14 falls through the seeding chute 21. At this time, the retention shutter 37 is open. On the other hand, since the driving means 30 is operated in conjunction with the feeding device 14 to drive the shutter shaft 29, the point seeding shutter 28 near the soil surface at the lower end portion of the sowing chute 21 is simultaneously opened and closed in conjunction with the feeding operation. . Therefore, the seed A can be seeded by opening and closing the seedling shutter 28.

When the steering clutch 2 is disengaged to stop the seeding work, the drive shaft 18 stops rotating, and the feeding device 14 and the spot seeding shutter 28 stop operating, and at the same time, the retention shutter 37.
Closes, the seeding chute 21 receives the falling seed A, and prepares for restarting the next seeding work. Therefore, when restarted, the seed A of the retention shutter 37 falls, so that it is possible to prevent or reduce the occurrence of stock loss immediately after the restart.

(Embodiment) Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In FIG. 2, reference numeral 1 denotes an airframe provided with an engine and the like, and drive wheels 4 are provided on both sides of a steering clutch 2 and a transmission case 3 therebetween. Has been. Reference numeral 5 denotes a support frame projecting rearward from the machine body 1, and a handle 6 is provided at a rear end portion of the support frame through an upward curved portion. A main float 7 is arranged on the lower side of the machine body 1. Reference numeral 8 denotes a transmission case, which is supported on the frame 5 by a support shaft 9. The transmission case 8 is provided with a pair of upper and lower toolbars 10 and 11 extending in the left and right,
The upper toolbar 10 is provided with a seed tank 12, and the lower toolbar 11 is provided with a pair of seeding floats 13 on the left and right sides.

The seed tank 12 has a feeding device 14 on the lower side. As shown in FIG. 1, the feeding device 14 is provided with a feeding roll 16 which is rotatably provided in the lower portion of the seed tank 12 and has a recess 15 formed on the outer periphery thereof. It is formed in an arc shape along the peripheral surface of the roll so that the seed A in the seed tank 12 is intermittently fed downward. A drive shaft 18 rotatably mounted on the transmission case 8 is inserted into the pay-out roll 16.
The feeding roll 16 is rotationally driven by 8. Guide plate 1
7 is swingably supported by a fulcrum shaft 19 at the upper end. An inspection window is opened on the lower side of the seed tank 12 corresponding to the front side of the feeding roll 16, and a window lid 20 is detachably attached so as to close the inspection window. Reference numeral 21 denotes a sowing chute, which is vertically connected to the feeding port 22 below the feeding device 14.

The seeding float 13 is pivotally connected to a link 23 fixed to the lower toolbar 11 via a pivot. The seeding float 13 is formed with a cutout portion 24 so as to be recessed from the rear side, a grooving device 25 and a soil covering member 26 are provided in front of and behind the cutout portion 24, and a seeding guide is provided in an intermediate portion thereof. A plate 27 is provided. The seeding guide plate 27 has a rectangular tubular shape in plan view, and the lower end of the seeding chute 21 is connected to the seeding guide plate 27. In the sowing guide plate 27, a point sowing shutter 28 for temporarily receiving and then dropping the seed A that intermittently drops in the sowing chute 21 is provided by a lateral shutter shaft 29 so as to be openable and closable.

Reference numeral 30 denotes a drive unit that drives the shutter shaft 29 so that each point seeding shutter 28 opens and closes in synchronization with the feeding operation of the feeding device 14, and the operation arm 31, the cam 32, and the interlocking rod 3 are provided.
3 and 3. The operating arm 31 is pivotally supported on one side of the seed tank 12 by a pivot shaft 34 so as to be vertically swingable, and the operating arm 31 extends forward through a cam plate 32 of the drive shaft 18. The operation arm 31 is interlocked with an opening / closing lever 35 of the shutter shaft 29 via an interlocking rod 33 on the tip side. A turnbuckle for expansion and contraction adjustment is provided on the interlocking rod 33 midway. The cam plate 32 has the same number of concave and convex cam portions 32a as the concave portions 15 of the feeding roll 16, and the cam portion 32a allows the operating arm 31 to swing up and down via the cam driven pin 36. There is. The operation arm 31 is urged downward by a tension spring.

37 is a staying shutter, which is provided on the seeding chute 21 between the feeding device 14 and the point seeding shutter 28, and is openable and closable in the horizontal direction. This stay shutter 37
As shown in FIG. 3, a support shaft 39 is attached to the engaging portion 38 at the outer end of the support shaft 39.
A lever 40 provided on the steering wheel 6 is engaged with the steering clutch lever 43 of the handle 6 through a support shaft 39, a link 41 and a Bowden wire 42. Therefore, when either the left or right steering clutch lever 43 is operated, the steering clutch 2 corresponding thereto is disengaged and the stay shutter 37 is closed.

In the above configuration, the left and right steering clutches 2 are connected together to start the vehicle, and at the same time, the drive shaft 18 rotates. Therefore, the feeding roll 16 rotates in the direction indicated by the arrow a in FIG. 1 via the drive shaft 17, guides the seed A that has entered the concave portion 15 on the outer periphery along the guide plate 17, and intermittently moves downward. Go out. Then, the fed-out seeds A form a group of several grains and fall through the seeding chute 21 while being guided downward. Of course, at this time, the retention shutter 37 is open. On the other hand, when the drive shaft 18 rotates, the actuating arm 31 repeats vertical movement around the pivot 34 by the cam portion 32a of the cam plate 32, and the point seeding shutter 28 rotates around the shutter shaft 29 via the interlocking rod 33 and the opening / closing lever 35. Repeat the opening / closing operation. The opening and closing of the point seeding shutter 28 is synchronized with the feeding operation of the feeding roll 16, and since the point seeding shutter 28 is provided at a position in consideration of the drop time of the seed A, at the time when the seed A reaches the shutter position. The seeding shutter 28 is in the closed state, and the seed A that falls is once received. Then, at the time of the opening operation below the next point sowing shutter 28, the seeds A are collectively dropped and seeded in the groove formed by the grooving device 25. Therefore, there is no variation between the group A of seeds A, and the seeds A fed back and forth do not mess with each other, so that the seeds can be sown by a predetermined number of grains.

When one steering clutch lever 43 is operated to turn at the end of the field, the steering clutch 2 is disengaged, the drive shaft 18 stops rotating, and the feeding roll 16 and the point seeding shutter 28 stop operating. , Sowing is stopped. On the other hand, at the same time, the staying shutter 37 is closed, so that the seed A that has been fed from the feeding roll 16 and is falling is received on the staying shutter 37 and reserved for the next restart of work.

Next, after turning, when the steering clutch lever 43 is released and the steering clutch 2 is connected, the seeding work is restarted. At this time, the retention shutter 37 opens and the retention shutter 3
Seeds A on 7 fall downward. Therefore, since the seed A in the middle of the sowing chute 21 falls, the fall distance is shorter than that of the feeding roll 16, and it is possible to prevent or reduce the occurrence of stock loss immediately after the restart of sowing.

In the above embodiment, the retention shutter 37 is interlocked with the operation of the steering clutch lever 43, but the invention is not limited to this, and it is interlocked with the means operated at the start / stop of the seeding work. Just do it.

Further, in the above-described embodiment, since the feeding device 14 feeds the seeds A downward through the front surface side, even if the guide plate 17 and the window cover 20 are made of a transparent body, the feeding situation is not known.
As shown in the figure, if the seed tank 12 and the feeding device 14 are provided in the reverse direction and the guide plates 17 and the like are made transparent, an operator traveling behind can visually determine the feeding condition.

Further, if the seeding chute 21 is formed in a vertical straight line as in the embodiment, the seed A can be dropped very smoothly as compared with a bent one.

(Effects of the Invention) According to the present invention, a staying shutter is provided in the intermediate portion between the feeding device and the point-seeding shutter, and this shutter is used to receive the seeds that are being dropped while seeding is stopped. Large numbers of seeds will not be sown as one strain when restarted. Further, when resuming, the retention shutter is opened and the seeds are dropped, so that the fall distance becomes short and the occurrence of stockout can be prevented or reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is an explanatory view of the shutter opening / closing part, and FIG. 4 is another embodiment. FIG. 2 ... Steering clutch, 12 ... Seed tank, 14 ... Feeding device, 16 ... Feeding roll, 21 ... Seeding chute,
28 ...... Spotting shutter, 37 ... Studging shutter.

Claims (1)

[Claims] 1. A seeding shutter 28 is provided at a lower end portion of a sowing chute 21 for guiding the seed A fed by the feeding device 14.
In a submerged soil direct sowing machine equipped with, in the intermediate portion between the feeding device 14 of the seeding chute 21 and the point seeding shutter 28,
A point seeding device for a direct sowing machine for submerged soil, comprising a retention shutter 37 which is opened at the start of sowing and closed at the time of stopping sowing.