JPH07246370A - Separating perforated plate of grain stone removing device - Google Patents

Abstract

PURPOSE:To improve the efficiency of stone dust removal by equipping a separating perforated plate provided with hemispherical projections which are higher toward a plus sieve side on the minus sieve side between the front and rear of the slits of the separating perforated plate. CONSTITUTION:This grain stone removing device is composed of a charging hopper 2 which is charged with harvested grains including an adulterant, such as stone dust, above a case 1, an air tunnel 4 existing below an oscillation frame 3 and a wind mill 5 for blasting air to the oscillation frame 3 in this air tunnel 4. The oscillation frame 3 is supported by inclined supporting rods 6 and is so constituted as to oscillate back and forth reciprocatively. A stone take-out port 13 is formed on the plus sieve side of the oscillation frame 3 and a grain take-out port 14 on the minus sieve side 12, respectively. The oscillation frame 3 is provided with a perforated plate 15 formed with the numerous slits 16 in a lateral direction apart specified interval in a left and right direction on a thin flat steel plate at its base. The hemispherical projections 18 which are higher toward the plus sieve side 11 are formed by pressing from the rear side on the plus sieve side 11 between the front and rear of the slits 16 and 16 of the perforated plate 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain removing device.

[0002]

2. Description of the Related Art Conventionally, in the publicly known Japanese Utility Model Publication No. 53-39648, a charging hopper for charging harvested grains including foreign matters such as stone chips is provided above the case and shaken inside the case at a position below the charging hopper. A moving frame is provided, a wind tunnel is provided below the swing frame, a wind turbine is provided in the wind tunnel, the swing frame and the wind turbine are driven by a motor, and the swing frame is supported by an inclined support rod. In a grain removing device that rocks back and forth back and forth to form a stone outlet on the upper side and a grain outlet on the lower side,
On the bottom surface of the rocking frame, a perforated plate formed by forming a number of slits a in the left-right direction on the front and back of the thin iron plate at regular intervals is provided, and a swing between the slit a of the perforated plate and the front and rear of the next slit a is provided. A structure in which a flat surface b, which is a thin iron flat plate, is formed on the lower side and a cut-and-raised protrusion c is formed on the upper side to increase the upper side toward the upper side is described. The width t of the cut-and-raised protrusion c is the same as that of the slit a, although not described in the publication.

[0003]

The AA cross section of the perforated plate of the above-mentioned known example is as shown in FIG. 5, and the stone dust d thrown out by the protrusion c does not climb the slope of the protrusion c. To return to the original. Therefore, it is difficult to reach the rock removal outlet on the swaying side and the sorting efficiency is low.

[0004]

OBJECT OF THE INVENTION To improve the efficiency of debris removal.

[0005]

Therefore, according to the present invention, the input hopper 2 for inputting harvested grains including foreign matters such as stone chips is provided above the case 1, and the swinging frame 3 is provided below the input hopper 2. Is provided, a wind tunnel 4 is provided below the swing frame 3, and a wind turbine 5 that blows air to the swing frame 3 is provided in the wind tunnel 4. The swing frame 3 is supported by the tilt support rods 6 and In the grain removing device in which the stone removing port 13 is formed on the upper side 11 of the swing frame 3 and the grain removing port 14 is formed on the lower side 12 of the swing frame 3, Is a thin iron flat plate provided with a perforated plate 15 in which a number of slits 16 in the left-right direction are formed at regular intervals in the front and rear, and the rocking side 12 between the slit 16 of the perforated plate 15 and the next slit 16 is front and rear. For the upper surface 11, a flat surface 17 which is a thin iron flat plate is shaken and the upper surface 11 is pressed from the back side to the front side. 11 is obtained by the screening perforated plate grain stone disconnect device having a hemispherical protrusion 18 to be higher in accordance lead to.

[0006]

When the grain containing stone chips is supplied to the input hopper 2, the grain is floated by about 10 mm by the wind of the windmill 5 blown up through the perforated plate 15, but the stone dust is hardly floated. The floating grain does not almost touch the perforated plate 15 which oscillates in the W direction below because it floats, so it is not shaken and flows exclusively to the lower side due to the gradient and is taken out from the grain extraction port 14, and the stone does not float. Therefore, the hemispherical projection 18 of the porous plate 15
And is rocked in the W direction and is pushed up to the rocking side 11. When the stone is pushed up by the first hemispherical projection 18, when it reaches the next hemispherical projection 18, it is guided by the arc portion 19 and divided into the left and right sides, and is guided in front of the next hemispherical projection 18. Therefore, the hemispherical protrusions 18 are successively pushed up and moved to the stone removing port 13 to be taken out.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. 1 is an entire case, 2 is a charging hopper that is mounted above the case 1, and is used for charging grains including impurities, and 3 is a charging hopper 2. Swing frame provided in the case 1 at the lower position, 4
Is a fixed wind tunnel mounted at a lower position of the rocking frame 3, 5 is a wind turbine which is mounted in the wind tunnel 4 and is rotatable only, and the rocking frame 3 and the wind turbine 5 are driven by a motor. The swing frame 3 is inclined forward and backward, and is supported by the tilt supporting rods 6, 6, and the lower ends of the tilt supporting rods 6, 6 are axially attached to the case 1 or a wind tunnel 4 fixed to the case 1 side. Then, the upper ends of the tilt supporting rods 6, 6 are pivotally mounted on the swing frame 3 by the shaft 8, 8. Reference numeral 9 denotes an eccentric wheel that is rotated by a motor provided at an arbitrary position, and 10 is a rod that connects the eccentric wheel 9 and the upper end of the tilt support rod 6. When the eccentric wheel 9 is rotated by the motor, it swings through the rod 10. The frame 3 is rocked back and forth in the W direction. Reference numeral 11 designates a sway upper side of the upper slope and 12 a lower sway side of the lower slope. A rock removing port 13 is formed on the rocking side 11 and a grain removing port 14 is formed on the rocking side 12.

A perforated plate 15 formed by punching a thin iron plate is provided on the bottom surface of the swing frame 3. The perforated plate 15 is provided with a large number of left and right slits 16 having a constant length on one surface in a zigzag pattern, but on the rocking side 12 between the slit 16 and the next slit 16 in the front-rear direction. Forms a flat surface 17 that is a thin iron flat plate, and forms a hemispherical protrusion 18 on the upside 11 which increases in height toward the upside 11. Since it is a hemispherical protrusion 18, the bird's-eye view shape is an arc portion 19 on both left and right sides of the protrusion 18, as shown in FIG.

[0009]

Operation of the Embodiment Next, the operation will be described. Since the present invention has the above-described configuration, the eccentric wheel 9 and the wind turbine 5 are energized by energizing the motor.
When is rotated, the swing frame 3 is swung in the W direction via the eccentric wheel 9 and the rod 10, and the wind generated by the rotation of the wind turbine 5 is blown up through the wind tunnel 4 and blows through the perforated plate 15. Then, when the grain containing the stone dust p harvested from the input hopper 2 is supplied, the grain is levitated by about 10 mm by the wind blown up the slit 16 of the perforated plate 15, but the mixed stone dust p is It doesn't surface because it is serious.

Since the floating grain is almost in contact with the hemispherical protrusions 18 of the perforated plate 15 which oscillates in the W direction below the grain, it flows exclusively to the lower side due to the gradient of the perforated plate 15. It is taken out from the grain outlet 14. Since the stone dust p does not float up even if it receives the wind of the windmill 5, it is pushed up by the hemispherical protrusion 18 of the porous plate 15 in the W-direction swinging action. At this time, according to the present application, the debris p pushed up by the first hemispherical projection 18 is divided into the left and right sides by the arc portion 19 in the front hemispherical projection 18 and guided to the front hemispherical side. Protrusion 1
Since it moves to the front side of 8 and is pushed up by the hemispherical protrusion 18, it advances step by step and does not return as shown in FIG. 4 of a known example, so that the selection efficiency is improved.

[0011]

The cross section AA of the known perforated plate is shown in FIG.
The stone dust d thrown away by the protrusion c does not reach the slope of the protrusion c and returns to its original state.
Therefore, it is difficult to reach the rock removal outlet on the swaying side and the efficiency is low. However, according to the present invention, the input hopper 2 for inputting harvested grains including foreign matters such as stone chips is provided above the case 1, the swing frame 3 is provided below the input hopper 2, and the swing frame 3 is provided below the swing frame 3. A wind tunnel 4 is provided at a position, and a wind turbine 5 for blowing air to the rocking frame 3 is provided inside the wind tunnel 4. The rocking frame 3 is supported by the tilt supporting rods 6 and 6 so as to rock back and forth in the W direction. In the grain removing device in which the rock removing port 13 is formed on the rocking side 11 of the rocking frame 3 and the grain extracting port 14 is formed on the rocking side 12, the rocking frame 3
A perforated plate 15 is formed on the bottom surface of the perforated plate with a number of slits 16 in the left-right direction, which are formed at regular intervals in the front-rear direction. The perforated plate 15 is oscillated between the slit 16 and the next slit 16. A flat surface 17 which is a thin iron flat plate is provided on the lower side 12 and a hemispherical protrusion 18 is provided on the upper side 11 which is pressed from the back side to the front side. First hemispherical projection 1 because it is a plate
The debris p pushed up by 8 is the hemispherical projection 1 in front of it.
In FIG. 8, the circular arc portion 19 divides the vehicle into left and right sides, guides it, moves to the front side of the hemispherical projection 18 on the side, and is pushed up by the hemispherical projection 18. Since it does not return as in 4, the sorting efficiency is improved.

[Brief description of drawings]

FIG. 1 is an overall sectional view.

FIG. 2 is a partial overhead view of a perforated plate.

FIG. 3 is a sectional view taken along line BB.

FIG. 4 is a partial overhead view of a known example perforated plate.

FIG. 5 is a sectional view taken along line AA.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Case, 2 ... Input hopper, 3 ... Oscillating frame, 4 ... Wind tunnel, 5 ... Windmill, 6 ... Inclined rod, 7 ... Shaft attachment, 8 ... Shaft attachment, 9
... eccentric wheel, 10 ... rod, 11 ... rocking side, 12 ... rocking side, 13 ... stone removal port, 14 ... grain removal port, 15 ... perforated plate, 16 ... slit, 17 ... flat surface, 18 ... hemispherical protrusion , 19 ... Arc part, p ... Stone dust.

Claims (1)

[Claims] 1. A charging hopper 2 for charging harvested grains containing foreign matters such as stone chips is provided above the case 1, and a rocking frame 3 is provided below the charging hopper 2, and a position below the rocking frame 3 is provided. A wind turbine 5 is provided in the wind tunnel 4 and blows air to the swing frame 3 inside the wind tunnel 4.
The rocking frame 3 is supported by the tilt supporting rods 6 so as to rock back and forth in the W direction.
In the grain removing device in which the stone removing port 13 is formed on the rocking side 12 and the grain removing port 14 is formed on the swaying side 12, innumerable slits 16 in the left-right direction are formed on the bottom surface of the swing frame 3 in the left-right direction at regular intervals. A perforated plate 15 formed by placing the perforated plate 15 is provided, and a flat surface 17 which is a thin iron flat plate is provided on the rocking side 12 between the slit 16 and the next slit 16 of the perforated plate 15 and the back side is on the rocking upper side 11. The perforated plate of the grain removing device provided with the hemispherical protrusions 18 that increase in height from the rocking side 11 pressed toward the front side.