JPH036166Y2 - - 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) A direct sowing machine in flooded soil that intermittently dispenses seeds from a seed tank using a dispensing device and sows the seeds directly into flooded soil via a sowing chute is disclosed, for example, in Japanese Utility Model Application Publication No. 10313/1983. It has already been proposed in
It is also being put into practical use.

Since this type of direct sowing machine is used in rice fields, it is necessary to avoid splashing of muddy water, etc., so the seed tank and feeding device are placed upwards, and the sowing chute is lengthened to guide the seeds close to the soil surface. ing.

(Problem that the invention seeks to solve) However, in this case, since a long seeding chute is used, even if the feeding device feeds out several seeds intermittently, the long seeding chute will not fit properly while falling. Seeds fed out one after the other mix with each other due to variations in falling speed, etc., and fall continuously or nearly so into the flooded soil from the bottom of the sowing chute, making spot sowing extremely difficult. It was difficult.

(Means for Solving the Problems) The present invention has been provided with the aim of solving the problems of the conventional art, and as a specific means for that purpose, the present invention has been provided with the aim of solving the problems of the conventional art. In a direct sowing machine in flooded soil, in which a plurality of seeding chute 18 are provided in the horizontal direction for directly sowing the fed seeds A into flooded soil, a spot sowing shutter 2 is installed near the lower end of each seeding chute 18 and near the soil surface.
5, and each of these point dispersion shutters 25
A driving means 31 is provided which connects the shutter shafts 26 coaxially and drives the shutter shafts 26 so that each point seeding shutter 25 opens and closes in synchronization with the feeding operation of the feeding device 13.
A plurality of elastic pieces 28 divided into a plurality of pieces in the width direction are formed on the distal end side of the elastic piece 28 .

(Operation) The seeds intermittently fed out by the feeding device 13 fall through each seeding chute 18 . On the other hand, the driving means 31 operates in conjunction with the feeding device 13 and drives the shutter shaft 26, so that the dot seeding shutter 25 located near the soil surface at the lower end of each seeding chute 18 is operated.
open and close simultaneously in synchronization with the feeding operation. Therefore,
The seeds A falling down each sowing chute 18 are once caught by each spot sowing shutter 25 and then fall, so that the seeds A can be sown.

(Embodiment) Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In Figs. 2 to 4, 1 is a fuselage equipped with an engine, etc., and a drive shaft 3 is provided on both sides via a transmission case 2. ing. 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 the main float, which is placed 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 lower side, and is configured to guide the intermittently fed seeds A into two and sow them in two rows. Therefore, in this embodiment, it is possible to sow four rows at the same time.

The seeding float 12 is pivotally connected to a link 19 fixed to the lower tool bar 10 via a pivot. A notch 20 is formed on both left and right sides of the seeding float 12 so as to be recessed from the rear side, and a trencher 21 and a soil covering member 2 are installed in correspondence with the notch 20.
2 are provided in the front and back, and a seeding guide plate 23 is provided in the middle thereof. Seeding guide plate 25
have a U-shape in plan view, and are attached to both ends of a horizontal support rod 24 fixed to the link 19, respectively. The lower ends of the seeding chute 18 are connected to each seeding guide plate 24, respectively. In each seeding guide plate 23, a dot seeding shutter 25 is provided which can be opened and closed by a horizontal shutter shaft 26 for once catching the seeds A that are intermittently falling in the seeding chute 18 and then letting them fall.

As shown in FIG. 5, the dot shutter 25 is made of an elastic plate such as a rubber plate, a metal plate, a synthetic resin plate, etc., and a plurality of slits 27 in the width direction are provided on the projecting end side.
is inserted from the tip side. Therefore, a plurality of elastic pieces 28 are formed on the tip side of the dotted shutter 25 and are divided into a plurality of pieces in the width direction by the slit 27, and each elastic piece 28 can be elastically deformed separately in the shutter opening/closing direction. , which comes into elastic contact with the receiving wall 23a of the seeding guide plate 23. The shutter shaft 26 connects all four dotted shutters 25 on the same axis, is rotatably inserted into the link 19, and has a plurality of adjustment holes 27 on one end thereof.
An opening/closing lever 30 is provided.

Reference numeral 31 denotes a drive means for driving the shutter shaft 26 so that each spot dissemination shutter 25 opens and closes in synchronization with the feeding operation of the feeding device 13, and has an operating arm 32, a cam plate 33, and an interlocking rod 34. As shown in FIGS. 6 and 7, the operating arm 32 is supported on one side of the seed tank 11 by a pivot 35 so as to be able to swing vertically. It is extended forward. The actuation arm 32 has a plurality of adjustment holes 36 on the tip side, and the adjustment holes 36 and the adjustment hole 2 of the opening/closing lever 30 are connected to each other.
It is interlocked and connected to the opening/closing lever 30 via an interlocking rod 34 inserted into the opening/closing lever 30. Interlocking rod 34
A turnbuckle 37 for adjusting expansion and contraction is provided in the middle. The cam plate 33 has uneven cam parts 33a on its outer periphery, the same number as the recesses 14 of the feed roll 15, and the cam plate 33a allows the cam driven roller 3
The actuating arm 32 is configured to swing up and down via the actuator 8. 39 is a tension spring that urges the operating arm 32 downward.

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 sowing chute 18. On the other hand, when the drive shaft 17 rotates, the actuating arm 32 repeatedly moves up and down around the pivot shaft 35 by the cam portion 33a of the cam plate 33, and the dispersion shutter 25 is moved from the shutter shaft via the interlocking rod 34 and the opening/closing lever 30. Repeat the opening/closing operation around 26. The opening and closing of this spot-seeding shutter 25 is synchronized with the feeding operation of the feed-out roll 15, and since the spot-seeding shutter 25 is provided at a position that takes into account the falling time of the seeds A, when the seeds A reach the shutter position, The dot-sowing shutter 25 is in a closed state and once catches the falling seeds A. Then, during the next downward opening operation of the dot seeding shutter 25, the seeds A are dropped all at once and sown into the grooves 40 formed by the groove cutter 21. Therefore, there is no variation between 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.

A shutter 25 is provided on one shutter shaft 26 so that the left and right shutters 25 open and close at the same time, but since a slit 27 is provided at the tip of the shutter 25, each shutter 25 can be opened and closed at the same time.
Even if there are variations in the mounting angle of the shutter 25, the shutter 25 can be brought into a completely closed state by its deformation. In other words, even if there are variations in the closing angle, it can be closed reliably. Also, for some reason, seeds A
Even when the seed A is bitten, the tip of the shutter 25 is divided into a plurality of elastic pieces 28 by the slit 27, so the elastic piece 28 corresponding to the seed A is largely elastically deformed and closed by the other elastic pieces 28. Therefore, even if the next seed A falls, it will not spill downward from the shutter 25.

The guide plate 16 that guides the seeds A fed out by the feeding roll 15 is a separate piece as shown in FIG. Roll 1 with biasing force
It may be provided so as to ride on the circumferential surface of the guide plate 5, and in this way, the seeds A will not be bitten between the guide plate 16 and damaged. Note that the pivot 41 is slidably inserted into an oblique long hole 43 formed in the side wall 42 of the seed tank 11.

The dot-spreading shutter 25 may use flexible brush members 44 as shown in FIG. 9, and the brush members 44 may be arranged in a row and attached to a holder 45. In this case, dot shutter 2
A plurality of elastic pieces 28 are formed on the tip side of 5, which are divided into a plurality of pieces in the width direction by the brush member 44, and even in this case, even if the seeds A are caught between the elastic pieces 28, they will not close at that part. can. In addition, the seeds A will not be caught in the brush unlike multi-layered brushes, and good spot sowing can be expected.

(Effect of the invention) According to the invention, the shutter 25 provided near the lower end of the seeding chute 18 and near the soil surface,
Since it opens and closes in synchronization with the dispensing operation of the dispensing device 13, the seed A dispensed intermittently can be caught once by the seeding shutter 25 and then dropped. Even if there is variation in the seedlings, the seeds can be uniformly sown using the spot-seeding shutter 25, and spot-seeding is possible even when the feeding device 13 is located above. Also, seeding chute 1
8 has multiple rows in the horizontal direction, each of which is provided with a spot-seeding shutter 25.
Since the five shutter shafts 26 are connected on the same axis and driven by the driving means 31, the structure is simple and can be implemented at low cost.

Moreover, on the tip side of the dot seeding shutter 25,
Since a plurality of elastic pieces 28 are formed which are divided into a plurality of pieces in the width direction, the tip side of each dot-shutter 25 can easily be elastically deformed in the shutter opening/closing direction. The shutter 25 can be reliably closed by elastic deformation of the distal end side of the shutter 25. Furthermore, even if the seed A gets bitten for some reason, since the distal end of the dot seeding shutter 25 is divided into a plurality of elastic pieces 28, the elastic piece 28 corresponding to the seed A will be largely elastically deformed, and the other parts will be Therefore, even if the next seed A falls, there will be no inconvenience such as it spilling downward from the dot seeding shutter 25, and its practical effect is significant. .

[Brief explanation of the drawing]

The drawings show an embodiment of the invention,
Figure 1 is a cutaway side view of the main parts, Figure 2 is a side view of the whole, Figure 3 is a plan view of the seeding float, Figure 4 is a rear view of the seeding unit, Figure 5 is a perspective view of the shutter,
FIG. 6 is a sectional plan view of the drive section, FIG. 7 is a rear view thereof, FIG. 8 is a sectional view of the feeding device, and FIG. 9 is a perspective view of the shutter. 11... Seed tank, 12... Seeding float,
13... Feeding device, 15... Feeding roll, 18...
...Seeding chute, 23...Seeding guide plate, 25...
...Point dissemination shutter, 26...Shutter shaft, 31
... Drive means, 32 ... Actuation arm, 33 ... Cam plate.

Claims (1)

[Claims for Utility Model Registration] Seeds A that are intermittently fed out by the feeding device 13
In a direct sowing machine in flooded soil, in which a plurality of seeding chute 18 are provided horizontally in multiple rows for directly sowing seeds into flooded soil, a dot seeding shutter 25 is provided near the lower end of each seeding chute 18 and near the soil surface. The shutter shafts 26 of each point-seeding shutter 25 are connected coaxially, and a driving means 31 is provided for driving the shutter shaft 26 so that each point-seeding shutter 25 opens and closes in synchronization with the feeding operation of the feeding device 13.
A dot sowing device for a direct sowing machine in flooded soil, characterized in that a plurality of elastic pieces 28 divided into a plurality of pieces in the width direction are formed on the tip side of the dot sowing shutter 25.