JPH10210810A - Negative pressure sowing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a negative pressure sowing device for continuously supplying seeds without interruption and without damaging the seeds. SOLUTION: Plural suction pipes 70 are projectingly provided with equal angle intervals radially on the peripheral surface of a rotor 90 provided inside a case 10, small holes 71 for sucking the seeds A are provided on the surface in a rotating direction of the tip parts of the suction pipes 70 and a seed storage 20 provided with an upward oblique bottom plate 21 and partitioned from the case 10 by a pair of brush-like partition walls 25 oppositely provided so as to pass through the suction pipes 70 without disturbance is formed on the suction pipe elevation side of the case 10. Further, the seed storage 20 is provided with a hopper 30 provided with an inclined bottom plate 31 continued to the oblique bottom plate 21 and partitioned from the seed storage 20 by a shutter 32 capable of changing a clearance with the inclined bottom plate 31 and the small holes 71 of the suction tools 70 are separated from the seed storage in an upward state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a negative pressure sowing apparatus for sowing seeds by adsorbing the seeds, releasing the adsorbed seeds at regular intervals, and free-falling the seeds.

[0002]

2. Description of the Related Art Conventionally, by adsorbing seeds, releasing the adsorbed seeds at regular intervals and allowing them to fall freely,
FIG. 1 shows a known sowing apparatus for sowing. That is, a plurality of tubular arms 7 are protruded radially at equal angular intervals on the peripheral surface of a rotating body 9 provided concentrically in a seed box 1 having an arc-shaped cross section arranged so that the center line is horizontal. On the leading surface of the tip of the arm 7 in the rotational direction,
The seed box 1 is provided with a small hole 7a for adsorbing the stored seed A at a lower portion thereof, and a seed drop tube 1a for releasing the seed A and allowing the seed A to freely fall is provided on the descending side of the tubular arm 7 of the seed box 1. is there.

[0003] A cleaning port 2 is provided at a lower portion of the seed box 1, and a bottom plate 3 which can be opened and closed around a hinge 8 and is fastened with a bolt and nut 6 is mounted outside the cleaning port 2.
Further, an elastic layer 4 such as a sponge which is elastically deformed is provided on the inner surface of the bottom plate 3 so that the tubular arm 7 is caught when passing through the tubular arm 7 and does not stop.

[0004] However, in the above-mentioned conventional sowing apparatus, when the seeds A are passed through the tubular arm 7 through the seeds A stored in the lower part of the seed box 1, the seeds A are compressed or subjected to a strong frictional force, thereby causing damage. May be. Further, when the remaining seeds are taken out, when the bottom plate 3 is opened, the seeds fall to the ground and are discharged, so that when the remaining seeds are collected, soil may be mixed with the seeds.

[0005]

The problem to be solved is that the above-mentioned conventional sowing apparatus may cause the seed A to be damaged when passing through the tubular arm 7 or when removing the remaining seed, the bottom plate 3 may be removed. When opened, the seeds fall to the ground and are discharged, so that when collecting the residual seeds, the soil is mixed with the seeds. The present invention provides a negative pressure sowing apparatus that solves the above-mentioned problems. .

[0006]

Means for Solving the Problems As shown in FIGS. 2 to 7, the seeding apparatus according to the first invention radially equiangularly surrounds a peripheral surface of a rotor 90 provided around a horizontal axis provided in a case 10. A plurality of negative pressure adsorption tubes 70 are protruded at intervals, small holes 71 for adsorbing seeds A are provided on the rotation direction surface of the distal end portion of the adsorption tube 70, and an upwardly facing suction tube of the case 10 has A seed reservoir 20 having a sloping bottom plate 21 and being separated by a pair of brush-like partition walls 25, 25 facing each other between the case 10 and the suction tube 70 so that the suction tube 70 can pass through without difficulty, is formed. The reservoir 20 has a hopper 30 having an inclined bottom plate 31 continuous with the inclined bottom plate 21, and a hopper 30 separated from the seed reservoir 20 by a shutter 32 capable of changing a gap with the inclined bottom plate 31. A drop tube 11 is provided on the descending side.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the seed reservoir 20 is fitted between the hopper side plates 33, 33, and the seed reservoir 20 and the hopper 30 are integrally connected to each other. The front part of both side plates 33, 33 is
2 and the front of the hopper 30 is
The knob bolt 3 is brought into contact with the vertical pillars 13 fixed to the rear inner surface of the hopper 12 and screwed from the outside to nuts 35 welded to the inner walls of the hopper side plates 33.
The notch 1 in which the upper and rear ends of the case side plates 12 and 12 are inserted between the bottom surfaces of the bolt heads 6 and 36 and the hopper side plate 33 and the shaft of the knob bolt 36 is provided in the case side plate 12.
4, 14 and tighten the knob bolts 36, 36,
A hopper 30 having a seed reservoir 20 in a case 10 is configured to be detachable.

According to the second invention, in addition to the functions and effects of the first invention, the knob bolts 36, 3 with the hopper 30 loosened are provided.
6 is fitted into the obliquely upward cutouts 14, 14 of the case side plates 12, 12, and the front surfaces of the hopper side plates 33, 33 are brought into contact with the L-shaped vertical columns 13, 13 of the case side plates 12, 12. By tightening the knob bolts 36, 36,
The hopper 30 can be easily attached to and detached from the case 10. Also, when removing the remaining seeds, even if the bottom plate 17 is opened, the amount of seeds that fall to the ground and are discharged is very small.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In the figure, F is the front, R
Will be determined later. Reference numeral 90 denotes a rotor provided in the case 10 and rotated around a horizontal axis 91. A plurality of suction tubes 70 project radially at equal angular intervals on a peripheral surface of the rotor. A small hole 71 is formed on the surface in the rotation direction Q at the tip, and the rotor 90 is configured to be able to adsorb the seed A by making the inside of the rotor 90 a negative pressure by a vacuum pump or the like (not shown).

On the peripheral surface of the rotor 90, a spare seat 72 for projecting the suction pipe 70 is provided, and the number and pitch of the suction pipe 70 can be changed as required. 1
Reference numeral 1 denotes a drop tube for releasing the seeds A adsorbed in the small holes 71 and dropping the seeds A freely. The drop tube 1 is formed on the side of the case 10 where the rotating adsorption tube 70 descends.

Reference numeral 20 denotes a seed reservoir formed on the suction tube rising side of the case 10, which has an inclined bottom plate 21 facing upward toward the case 10, and between which the suction tube 70 passes without any trouble. A pair of brush-like partition walls 2 opposed to each other as possible
Separated by 5,25. When the nut 16 is loosened, the bottom plate 17 is detached from the cleaning hole 15 at the bottom of the case 10 so that the clogged seeds A can be taken out. The case 10 is provided with a cover 18 for covering the upper part, and the cover 18 is prevented from moving in the horizontal direction by a pillar 19. Reference numeral 30 denotes a hopper to which the seed reservoir 20 is assembled and which continuously supplies the seed A to the seed reservoir 20. The inclined bottom plate 31 is continuous with the inclined bottom plate 21 of the seed reservoir 20. In the meantime,
The gap with the inclined bottom plate 31 is separated by a shutter 32 that can be displaced in the vertical direction, and the position in the vertical direction is arbitrarily fixed by the wing nut 37.

More specifically, the seed reservoir 20 and the hopper 30 are configured as follows. That is, 33,
33 is a hopper side plate. Reference numerals 34, 34 denote vertical bent edges formed by bending the front portions of the hopper side plates 33, 33 at right angles. Numeral 23 denotes a vertical frame constituting the seed reservoir 20, the front surface of which is vertically bent edges 34, 34.
The hopper side plates 33 are fitted into the front portions of the side plates 33 so as to make contact with them. Reference numeral 24 denotes a vertical edge formed by bending a front portion of the vertical frame 23 at a right angle, reference numerals 26 and 26 denote L-shaped brush frames fixed to the left and right inner surfaces of the vertical frame 23, and reference numeral 28 denotes each of the brush frames 26. The bundling tool 27 at the base end of the brush-like partition wall 25 is fitted and fixed in a vertical fitting groove formed between the vertical edge 24 and the vertical groove 24.

The seed reservoir 20 in which the above components are integrally connected
The hopper 30 and the case side plates 12, 1 are as follows.
Insert and fix between the two. The seed reservoir 20 is fitted between the hopper side plates 33, 33 to integrally connect the seed reservoir 20 and the hopper 30, and the front portions of the hopper side plates 33, 33 are fitted between the case side plates 12, 12. The front surface of the hopper 30 is brought into contact with the vertical pillars 13 fixed to the rear inner surfaces of the case side plates 12, respectively.
The upper and rear ends of the case side plates 12 and 12 are inserted between the bottom surfaces of the bolt heads of the knob bolts 36 and 36 screwed from the outside to the nuts 35 and 35 welded to the inner walls of the case 3 and 33 and the knob bolt 36. Of the case side plate 12
And the knob bolt 3
6, the hopper 30 having the seed reservoir 20 is fixed to the case 10.

Further, the entire seeding apparatus will be described.
40 is a frame supporting the case 10 and the hopper 30; 41 is a coupler for towing by a tractor or the like (not shown); 50 is a seed A attached to the front end of the frame 40;
Grooving to form a groove for seeding,
A wheel for driving the rotor 90 attached to the rear end thereof, not shown, through a transmission mechanism such as a timing belt between the rotor 90, the rotor 90 is rotated according to the traveling distance of the wheel 60, Seeds A are sown at equal intervals on a field. On the peripheral surface of the wheel 60, teeth 61 are provided at equal intervals so as not to slide on the field. In addition,
Numeral 80 denotes a soil covering plate that covers the groove after seed A is sown.

The operation will be described. The seed A is put into the hopper 30, the shutter 32, the inclined bottom plate 21, and the inclined bottom plate 3
When the shutter 32 is pulled up so that a desired gap S is formed between the seed A and the seed 1, the seed A flows from the gap S and enters the seed reservoir 20. However, since the seeds A are blocked by the brush-like partition walls 25, the seeds A stored in the seed reservoir 20 do not become higher than the gap S.

In this state, when the seeding device is pulled on the field by a tractor or the like, a groove is formed by the leading groove 50. At the same time, when driven by the wheels 60 and the rotor 90 rotates in the same direction as the wheels 60, the suction tube 70 also rotates in the same direction. Paying attention to one of the suction pipes 70, the suction pipe 70 pushes the brush-like partition 25 to the left and right, and
The inside of the seed reservoir 20 is raised with the small holes 71 facing upward. At this time, the inside of the rotor 90 is under a negative pressure by a vacuum pump (not shown), and the seed A is adsorbed on the upward small hole 71 while the suction tube 70 passes through the seed A stored in the seed reservoir 20. Is done.

With the rotation of the rotor 90, the adsorption tube 70 that has adsorbed the seeds A into the small holes 71 rotates about half a turn, and its tip passes through the drop tube 11 with the small holes 71 facing downward. During this time, the pressure inside the adsorption tube 70 changes from negative pressure to positive pressure by switching a valve (not shown). Seed A thus adsorbed
Leaves the adsorption tube 70, falls freely in the fall tube 11, and is sown in the ditch of the field. Immediately thereafter, the soil is raked by the earth covering plate 80, and the seed A in the groove is covered with the soil. The adsorption tube 70 that has released the seeds A, with the rotation of the rotor 90,
During rotation, the inside of the tube is changed to a negative pressure, and passes through the seed reservoir 20 repeatedly.

When the seeds A in the seed reservoir 20 decrease, the seeds A in the hopper 30 flow down the inclined bottom plate 31 and
, The seed A is always kept at a substantially constant level in the seed reservoir 20. Moreover, since the adsorption tube 70 passes obliquely upward through the very shallow position of the seed A stored in the seed reservoir 20, it does not compress the seed A or apply a large frictional force. Therefore, the seed reservoir 20
The seed A in the inside is not damaged by the adsorption tube 70.

[0019]

Since the present invention is configured as described above, the supply of the seeds A is continuous, a constant amount of the seeds A is always held in the seed reservoir 20, and when the seeds A pass through the adsorption tube 70, The force exerted on the seed A by the adsorption tube 70 is small, so that the seed A is not damaged, and the seed A is smooth,
It is sown efficiently and accurately on Hatagami. Further, since the case 10 accommodating the rotor 90 and the hopper 30 are separable, it is extremely easy to repair a portion that is easily damaged. Furthermore, when removing the remaining seeds, even if the bottom plate 17 is opened, the amount of seeds that fall to the ground and are discharged is very small.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a conventional example.

FIG. 2 is a side view showing the appearance of an example of the present invention.

FIG. 3 is a longitudinal sectional side view of a main part of FIG. 2;

FIG. 4 is an exploded side view of FIG. 2;

FIG. 5 is a plan view of FIG. 3;

FIG. 6 is a partially enlarged view of FIG. 5;

FIG. 7 is a front view of the brush-like partition, and is a view corresponding to a section taken along line YY of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seed box 1a Seed drop tube 2 Cleaning opening 3 Bottom plate 4 Elastic layer 6 Bolt nut 7 Tubular arm 7a Small hole 8 Hinge 9 Rotating body 10 Case 11 Drop tube 12 Case side plate 13 Vertical column 14 Diagonally upward cutout 15 Cleaning opening 16 nut Reference Signs List 17 bottom plate 18 lid 19 pillar 20 seed reservoir 21 inclined bottom plate 23 vertical frame 24 vertical edge 25 brush-like partition wall 26 brush frame 27 bundle tool 28 mounting groove 30 hopper 31 inclined bottom plate 32 shutter 33 hopper side plate 34 vertical bent edge 35 nut 36 Knob bolt 37 Nut 40 Frame 41 Connector 50 Groove cutting 60 Wheel 61 Tooth 70 Suction tube 71 Small hole 72 Spare seat 80 Covering plate 90 Rotor 91 Horizontal axis A Seed F Front Q Rotor rotation direction R After S gap

Claims (2)

[Claims] 1. A plurality of negative pressure suction tubes (70) projecting radially at equal angular intervals on a peripheral surface of a rotor (90) provided in a case (10) for rotating around a horizontal axis. A small hole (71) for adsorbing the seed (A) is provided on the surface in the rotation direction of the tip of the tube (70), and an upward inclined plate (21) is provided on the suction tube rising side of the case (10). And a seed reservoir (20) separated from the case (10) by a pair of brush-like partition walls (25, 25) opposed to each other so that the suction tube (70) can pass through without difficulty. In the seed reservoir (20), an inclined bottom plate (3) connected to the inclined bottom plate (21) is placed.
1) and a hopper (30) separated from the seed reservoir (20) by a shutter (32) capable of changing a gap with the inclined bottom plate (31) is provided. A negative pressure seeding apparatus comprising a drop tube (11). 2. A seed reservoir (20) is inserted between both side plates (33, 33) of the hopper, so that the seed reservoir (20) and the hopper (3) are inserted.
0) and the hopper side plates (33, 3).
Insert the front part of 3) between the case side plates (12, 12),
The front surface of the hopper (30) is brought into contact with the vertical columns (13, 13) fixed to the rear inner surfaces of the case side plates (12, 12), respectively, and the nut (3) is welded to the inner walls of the hopper side plates (33, 33). The upper and lower ends of the case side plates (12, 12) are inserted between the bottom surfaces of the bolt heads of the knob bolts (36, 36) screwed to the outside from the hopper side plate (33) and the knob bolts (36). Is inserted into the notches (14, 14) provided in the case side plate (12), and the knob bolts (36, 36) are tightened, so that the hopper (30) having the seed reservoir (20) in the case (10). The negative pressure sowing apparatus according to claim 1, wherein the apparatus is configured to be detachable.