JPS6239613Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a vacuum seeding machine that uses the suction pressure of the blower to attract seeds to the small holes in the seed plate, and then carries the seeds out of the hopper by rotation of the seed plate and drops them at the lower corner of the casing. This invention relates to a seed returning device.

Conventional seeding machines place seeds in the recesses of a feed roller and transport them out in fixed quantities from a hopper, but this method cannot evenly feed out small, complex-shaped vegetable seeds. Recently, a vacuum seeding machine has been developed that uses the suction pressure of a blower to attract seeds to the small holes in the seed plate, eliminating the drawbacks of the delivery roller and smoothly delivering small, complex-shaped seeds. The present invention is to provide such a vacuum seeding machine with an annular chamber and a fan-shaped chamber concentrically provided on the inner surface of the lid plate, the outer fan-shaped chamber aligned with the small hole row of the seed plate, and a bridging prevention device installed on the shaft of the seed plate. The vacuum seeding machine is a simple structure that prevents wasteful removal of seeds by firmly planting the string pieces and storing them in the annular chamber, and dropping the excess seeds that have entered the fan-shaped chamber into the annular chamber and returning them to the starting end of the fan-shaped chamber. succeeded in improving the condition of

In Figs. 1 to 3, 1 is a circular casing with an annular cavity 2 cut out, approximately half of the front side is covered with a thick fan-shaped cover plate 6, and is fixed with two bolts 3, 3. A seed plate 4 having a large number of small holes 5 formed at equal pitches on a circular line is housed in this casing. The casing 1 is attached to the frame of the seeding machine (not shown), and the seed plate 4 has its peripheral edge fitted into the shallow step of the casing to airtightly connect the two, and the annular cavity 2 of the casing is inserted into the row of small holes in the seed plate. 5. Follow... The lower left edge of the cover plate 6 is horizontal, and the upper right edge is inclined at about 45 degrees. An annular chamber 7 and a fan-shaped chamber 8 are concentrically hollowed out on the inner surface, and both chambers are separated by an arc-shaped partition wall 9. 8 along the row of small holes 5 of the seed plate, and a delivery port 10 is provided at the right end.
Cut out the field wall 9 at the lower left corner of the cover plate 6 to communicate the starting ends of the annular chamber 7 and the fan-shaped chamber 8, and connect the right end of the field wall 9 with a narrow side edge 11 extending from the lower left edge to the right edge of the cover plate 6. Continuously.

12 is a vertically long funnel-shaped hopper attached to the left side of the lid plate 6, and a narrow outlet 13 is provided at the lower corner of the back side.
is fitted into the lower left corner of the cover plate 6 to communicate with the starting end of the fan-shaped chamber 8, and the hopper 12 is arranged so that the small hole rows 5 of the seed plate pass through this outlet 13. 14 is a discharge pipe with the upper part swollen towards you, and 14 of the casing.
The small hole 5 at this position is covered by a notch 15 in the upper right corner through which the seeds pass. A transparent cover (not shown) is attached to the right edge of the casing, and the discharge pipe 1 is connected from the upper right edge of the lid plate 6.
Coat up to 4 seed plates 4. Reference numeral 16 denotes a shaft cylinder that passes through the casing 1 and the lid plate 6, and the two protrusions 18 protruding from the collar 17 on the outer periphery are inserted into the fixing hole of the seed plate 4 to fix the seed plate, and the drive shaft 20 is fitted into the shaft hole. The seed plate 4 is rotated clockwise by applying power to the drive shaft 20 from a grounding wheel (not shown) of the seeding machine. 21 is a blower mounted on the frame of the seeding machine, and a fan (both not shown) driven by a motor is built into the machine body 22.
An intake port 23 that opens on the end face of the fuselage and a base 24 on the upper back surface of the casing are connected by a conduit 25, and a joint pipe that is airtightly inserted into the exhaust port 26 on the rear circumferential surface of the fuselage 22 and the lower corner of the back face of the casing 1. 27 to conduit 28
The joint tube 27 is brought into contact with the lower part of the back surface of the seed plate 4 to cover the small hole 5 at this position.

In FIGS. 2 and 3, 30 is several string pieces, which are fixedly planted at equal angles on the periphery of the collar 17 to which the seed board 4 is attached.
This is placed in an annular chamber 7 in the base plate, curved near the base, and extended along the inner circumferential surface of the opening wall 9 in the lid plate and the side edge 11 extending from the lower left edge to the upper right edge. The string piece 30 is required to have elasticity, and is used by cutting a rubber or soft plastic string into the required length. 1st to 4th
In the figure, numeral 31 is a small circular regulating piece, on which small wedge-shaped protrusions 32, 32 are planted symmetrically, and the spacing between the protrusions is made somewhat longer than for a relatively large seed like a radish. Set. 33 is grab 3
Fix the regulating piece 31 to the inner end that is screwed onto the cover plate 6 and looking into the fan-shaped chamber 8 using the screws shown in Fig. Seed S
, and align the center of the regulating piece with the center of the small hole 5 that comes to this position.

An example of a vacuum seeding machine has the above-mentioned configuration. Seeds are put into the hopper 12 and introduced into the starting end of the fan-shaped chamber 8 through the outlet 13, and the seed plate 4 is rotated clockwise by applying power to the drive shaft 20. The motor is energized to drive the blower 21. When the blower is activated, the internal air of the casing 1 is absorbed by the conduit 25, and the external air enters the fan-shaped chamber 8 from the outlet 10 of the cover plate and enters the casing 1 through the row of small holes 5 of the seed plate. However, since the suction force of the blower 21 is strong, the pressure inside the casing as a whole becomes negative.
The air sucked into the blower 21 flows into the body of the blower from the intake port 23, and this air becomes discharge pressure and flows from the exhaust port 26 through the conduit 28 to the joint pipe 27.
It is sprayed from this joint pipe to the lower part of the back side of the seed plate 4, passes through the small hole 5 when it comes around, blows off the dust attached to the hole wall, and flows downward from the discharge pipe 14. leak.

Seeds entering the fan-shaped chamber 8 from the hopper 12 are attracted to the small holes 5 because the inside of the casing is under negative pressure on the back side of the seed plate 4, and the seeds S remain adsorbed to the small holes 5. As it rotates, it moves clockwise through the fan-shaped chamber 8, exits the outlet 10, goes around the periphery of the casing 1, and then enters the discharge pipe 14 in the lower corner.
to go into. When the small hole 5 comes into contact with the joint pipe 27, the seeds S are blown away by the pressure of the air discharged from the blower 21, fall in the direction of arrow C while hitting the inner wall of the discharge pipe 14, and fall to a predetermined position. The seeds are sown on the ground in pitches. In the case of large seeds, they may be allowed to fall naturally through the small holes in the seed plate without applying exhaust pressure from a blower.

When the seed plate 4 rotates, the string pieces 30 move clockwise in the annular chamber 7 along with the collar 17, rubbing against the inner circumferential surfaces of the field wall 9 and the side edge 11, and successively touch the bottom left of the cover plate 6. Come around to the corner. In this part, the field wall 9 is cut out and the inner and outer annular chambers 7 and the starting ends of the fan-shaped chambers 8 are in communication with each other, so the string piece 30' that has been turned here stretches by its own elasticity and connects the inner annular chamber 7 with the starting end of the fan-shaped chamber 8. From the chamber 7 it enters the outer fan-shaped chamber 8. The outlet 13 of the hopper is fitted into the lower left corner of the lid plate 6, and the seeds in the hopper are collected at this outlet and the starting end of the fan-shaped chamber 8, so the string piece 3
0' stretches in the seed pool with its own elasticity and stirs the seeds, and this stirring reliably prevents the bridging phenomenon of the seeds. Subsequently, the string piece 30' bends due to its own elasticity and returns to the inner annular chamber 7, and moves clockwise while rubbing against the inner circumferential surfaces of the cutting wall 9 and the side wall 11.

When sowing radish seeds, grasp 3 as shown in Figure 4.
4 to adjust the distance between the protrusions 32 and 32 to the full distance with respect to the seed path D. Seeds S are usually attracted to the small holes 5 of the disk one by one and moved, but sometimes two seeds are adsorbed among a large number of seeds. In this embodiment, one seed passes directly between the protrusions 32, 32, and two
When the seeds move, one of them hits the back surface of the protrusions 32 and is dropped, and only one seed passes between the protrusions and is carried away. When sowing small seeds, the grip 34 is rotated to reduce the effective spacing E between the protrusions 32, 32 with respect to the seed path D, so that only one small seed is carried out passing between the protrusions.

In such a vacuum seeding machine, the present invention prevents the bridging phenomenon of seeds at the outlet of the hopper by storing a string piece of elastic material in the annular chamber, and also prevents the bridging phenomenon of seeds at the end of the field wall that is necessary to provide the string piece. The extra seeds that have entered the fan-shaped chamber are dropped into the annular chamber by cutting out the opening, and the seeds are returned to the starting end of the fan-shaped chamber to prevent seeds from being carried away unnecessarily.

In one embodiment of the present invention, as shown in FIGS. 1 and 3, the terminal end of the field wall 9 that separates the annular chamber 7 and the fan-shaped chamber 8 is cut out, and the fan-shaped chamber 8, which serves as a passage for the seeds, is cut out from the notch 35. This allows communication with the upper part of the annular chamber 7 directly below the regulating piece 31 . In a vacuum seeding machine, in addition to seeds that are attracted to the small holes 5 of the seed plate, there are also seeds that adhere to the seed plate itself and enter the fan-shaped chamber 8, and these seeds fall out of the outlet 10 of the cover plate and are wasted. It may be carried away. In this embodiment, excess seeds that have entered the fan-shaped chamber 8 fall from the notch 35 in the field wall to the upper part of the annular chamber 7, and seeds that hit the projections 32 of the regulating piece also fall from the notch 35 to the upper part of the annular chamber 7. These seeds move together with the string piece 30 through the annular chamber 7 and return to the starting end of the fan-shaped chamber 8, where they are attracted to the small hole 5 of the seed plate, go around the periphery of the casing 1, and reach the lower corner. It falls from the discharge pipe 14 and is sown on the ground.

The above description describes one embodiment of the present invention, and the present invention is not limited to this embodiment, and the design can be changed within the gist of the invention.

According to the present invention, in a vacuum seeding machine in which the suction pressure of the blower is used to attract the seeds to the small holes in the seed plate, and the seeds are carried out from the hopper by the rotation of the seed plate and fall at the lower corner of the casing, the inner surface of the lid plate is used. An annular chamber and a fan-shaped chamber are provided concentrically, the outer fan-shaped chamber is aligned with the row of small holes in the seed plate, and the field wall that separates the annular chamber and the fan-shaped chamber is cut out at the part where the hopper outlet joins, and both chambers are separated. A string piece of elastic material to prevent bridging is fixed to the shaft of the seed plate and placed in the annular chamber.
The end of the field wall, which was necessary to provide this string piece, was cut out to communicate a fan-shaped chamber, which serves as a passage for seeds, with the upper part of the annular chamber, and excess seeds that have entered the fan-shaped chamber are returned to the annular chamber. and return it to the beginning of the fan-shaped chamber,
It is possible to reliably prevent the bridging phenomenon of seeds at the exit of the hopper, and also to reliably prevent seeds from being unnecessarily carried away, and has the effect of improving the performance of the vacuum seeding machine with a simple configuration.

[Brief explanation of the drawing]

Fig. 1 is a front view of a vacuum seeding machine equipped with an embodiment of the present invention, Fig. 2 is a sectional view taken along line AA in Fig. 1, and Fig.
The figure is an inner view of the lid plate seen from the line B--B in FIG. 2, and FIG. 4 is a front view of the regulating piece. In addition, 1 is a casing, S is a seed, 4 is a seed plate, 5 is a small hole, 6 is a lid plate, 7 is an annular chamber, 8 is a fan-shaped chamber, 9 is a field wall, 12 is a hopper, 13 is its outlet, 21 is a blower, 23 is an intake port, 30 is a string piece, and 35 is a notch.

Claims (1)

[Scope of utility model registration request] A seed plate with many small holes drilled in a circular line is placed in a circular casing and covered with a lid plate with a hopper.
In a vacuum seeding machine, the casing is connected to the intake port of the blower and is provided with means for rotating the seed plate, and the seeds are attracted to the small holes of the seed plate, carried out from the hopper, and dropped at the lower corner of the casing. An annular chamber and a fan-shaped chamber are provided concentrically on the inner surface of the hopper, the outer fan-shaped chamber is aligned with the row of small holes in the seed plate, and the field wall that separates the annular chamber and the fan-shaped chamber is cut out at the part where the outlet of the hopper joins. The starting ends of the chambers are made to communicate with each other, several string pieces made of elastic material are fixedly planted on the shaft of the seed plate, and placed in the annular chamber in the lid plate.The string pieces are curved and connected to the field wall of the lid plate. A seed return device for a vacuum seeding machine, characterized in that a fan-shaped chamber, which serves as a passage for seeds, is communicated with an upper corner of an annular chamber by notching the end of a field wall along the inner circumferential surface of a side edge.