JPH0741211B2 - Disc rotating type grain sorting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] In the present invention, brown rice is selected from mixed rice after hulling by rotating a donut-shaped disc having a large number of recesses on the surface. The present invention relates to a grain selection device.

[Conventional technology]

In the sorting cell whose lower half is formed in a cylindrical shape, the rotating shaft is axially supported in parallel with the axis of the sorting cell, and the rotating shaft has a donut-shaped disc formed with a plurality of recesses on one or both sides. While a plurality of sheets are provided at appropriate intervals in the direction, the sorting cell is provided with a portion for supplying mixed rice of paddy and brown rice at one end in the axial direction, and a portion for discharging paddy at the other end, and each of the discs. A disk rotary type grain sorting device, which is provided with brown rice gutters between the upper parts of the above, is disclosed in Japanese Patent Application Laid-Open No. 56-136688 as a prior art.
It is proposed by the gazette.

In this disc rotating type grain sorting device, the mixed rice fed from the feeding section at one end of the disc is lifted to a certain height by the rotation of the disc in the portion between the discs and then dropped. The fluidized bed of the mixed rice is transferred to the discharge part while repeating the flowing flow. While the fluidized bed is being transferred, the brown rice in the mixed rice fits into the recess of the disc and falls from a high position, so that the brown rice that falls from a high position can be received and taken out by the brown rice gutter. It is the one.

[Problems to be solved by the invention]

Therefore, as in the above-mentioned prior art, the brown rice gutter provided between the upper portions of the respective discs is provided on the side where the brown rice fitted in the recess formed on one or both sides of the disc in the radial direction is fried and then dropped. In other words, the recess of the disk is arranged on the side that moves downward from above.

On the other hand, when two adjacent discs pass through the fluidized bed in the lower part of the sorting cell, the mixed rice such as brown rice and paddy that did not fit in the recess in each disc is distributed in the radial direction of one of the discs. The mixed rice that bounces against the surface hits the surface of the facing disk, but since the two adjacent disks are rotating in the same upward direction, the mixed rice that repeats the bounce and bounce is There is a phenomenon in which the discs are dragged by the rotation of the discs to reach the upper portions of the discs such that the positions of collision with the surfaces of the both discs become higher.

Therefore, the paddy that jumped up to such a high position is in the brown rice gutter adjacent to the previous period, and there is a problem that the paddy taken out from the brown rice gutter is mixed and the sorting accuracy deteriorates. It was

The present invention aims to provide means for solving this problem.

[Means for solving problems]

In order to achieve this object, the present invention, one end in the axial direction of the sorting cell, a supply portion of mixed rice of paddy and brown rice, the other end is provided with a paddy discharge portion, respectively, in the sorting cell , A plurality of donut-shaped discs having a large number of recesses formed on the surface thereof are disposed at appropriate intervals so as to be supported and rotated by a rotating shaft extending in the axial direction, and the sorting cell includes: In the disc rotary type grain sorting device, which is provided with brown rice gutters on the side where the recesses in each disc move downward between the tops of the discs, the recesses in each disc are located between the tops of the discs. The grain blocking bodies extending in the direction opposite to the direction in which the brown rice gutters extend are arranged on the upward moving side.

[Operation and effect of invention]

With this configuration, when the disc passes through the bottom side in the sorting cell, that is, the fluidized bed, the brown rice fitted in the recess in each disc passes through the side even if there is a grain blocker. It can be lifted to the top and fall into the brown rice gutter when the recess moves downward, while the mixed rice that did not fit in the recess on each disc repeatedly hits and bounces on the radial surfaces of two adjacent discs. Even if it ascends, it is bounced back to the lower surface of the grain blocker placed between the adjacent disks during the ascent, and the mixed rice falls on the original fluidized bed, and the paddy is mixed into the brown rice gutter. It is possible to prevent this from occurring, and it is possible to significantly reduce the rate of paddy mixed in brown rice taken out of the machine, and to improve the sorting accuracy.

〔Example〕

A description will be given below of a drawing of an embodiment in which the present invention is applied to a hulling and sorting machine.
Is used to sort the deciduous rice after removal in the hulling part (not shown) into hull and mixed rice in the wind-selecting part, and the mixed rice is separated into brown rice and hull by the horizontal disk 11 in the sorting cell 2. Is equipped with a sorting cell 2 whose lower half is formed into a cylindrical shape,
The sorting cell 2 has a side plate 2a at one end thereof in the axial direction.
In the hopper 6 connected to the supply section 4, the tip of the mixed rice thrower from the wind selecting section is opened, while the supply section 4 is formed in the side plate 2b at the other end. The discharge section 5 is connected to a reflux shout 7 for returning the paddy discharged from the discharge section 5 into the paddy supply hopper in the paddy section. A remaining rice discharge valve 9 is provided on the bottom surface of the sorting cell 2 so as to be openable and closable.

In the sorting cell 2, a rotary shaft 10 which is rotationally driven at an appropriate speed by a motor is axially supported in parallel with the axis of the sorting cell 2, and a donut-shaped disk 11 is appropriately mounted on the rotary shaft 10 in the axial direction. A plurality of sheets are provided at intervals. , Each of the discs 11 is a donut-shaped disc 11 having a large number of recesses 12 engraved on one or both sides along the radial direction of which brown rice fits but paddy does not fit. A plurality of sheets are provided at appropriate intervals in the axial direction.

Incidentally, each of the plurality of recesses 12 in each of the discs 11,
As shown in FIGS. 4 to 6, the disk 11 has an oval shape in which the length L in the circumferential direction of the disk 11 is made larger than the width S in the radial direction, and the width S in the radial direction is brown rice. Is smaller than the length dimension of the unpolished rice and is larger than the width dimension of brown rice, on the other hand, of the left and right inner side surfaces 12a, 12b in the longitudinal direction of each recess 21, it is located on the front side with respect to the disc rotation direction. Adjust the inner surface 12a to an appropriate angle θ (for example, about 15
Formed on the inclined surface of the inner surface 12a and the bottom surface 12c
The length L1 from the point of intersection with the other inner surface 12b is substantially equal to the length of brown rice, and the L is an intermediate length between the length of brown rice and the length of paddy. The depth T of the recess 12 is set to be substantially equal to the diameter of the brown rice.

A brown rice gutter 13 is provided on the upper side between the discs 11 and on the upper side between the discs 11 and the side plates 2a, 2b of the sorting cell 2 on the side where the recess 12 of each disc 11 moves downward. The brown rice gutters 13 are inserted in an inclined shape, and the lower ends of the brown rice gutters 13 communicate with the brown rice wind selector with a brown rice removing chute through the upper surface of the brown rice falling plate 14.

In addition, the left and right sides of each brown rice gutter 13 are provided with the corresponding brown rice gutters.
Only the part where 13 crosses the surface of the disk 11
By providing the scraping plate 15 made of an elastic material such as rubber so as to be close to or in contact with the surface where the recess 12 is formed, the amount of brown rice taken into the brown rice gutter 13 can be increased.

Further, in the present invention, the upper part of each disc 11, the space between the disc 11 and the side plates 2a, 2b of the sorting cell 2 are:
Grain blockers 16 extending in a direction opposite to the direction in which the tip of the brown rice gutter 13 extends are respectively arranged in an inclined manner on the side where the recess 12 of each disc moves upward (first position).
(See Figures and 2).

Then, the upper surface side of each grain blocker 16 is formed into an upward groove-shaped mixed rice gutter 16a, and the lower end of each mixed rice gutter 16a is provided on the side of the sorting cell 2 with the axis of the rotary shaft 10. Is communicated with a reflux passage 18 with a horizontal screw conveyor 17 extending in the direction, and one end of the reflux passage 18 is connected via a chute 19 to a reflux port 20 opening at an arbitrary position on the side of the supply unit 4 in the sorting cell 2. It is a thing.

Thus, during the hulling and sorting work, the hulled rice removed from the hulling portion is removed by wind sorting, and the mixed rice thereafter is supplied from the mixed rice thrower into the sorting cell 2 from the supply section 4. .

The mixed rice fed into the sorting cell 14 in this manner is accompanied by the rotation of each disk 21 and the arrow A indicated by a two-dot chain line in FIG.
As shown by (4), it is transported to the discharge part 5 while flowing so as to drop after being lifted to a certain height.

During this flow, the brown rice in the mixed rice fits into the recesses 12 of each disk 11 and is lifted to a high position, and then falls from the recesses 12 to be sorted into the brown rice trough 13.

In this way, the brown rice that has entered the brown rice receiving trough 13 is subjected to finishing wind selection in the brown rice wind selection section, and then taken out of the machine from the brown rice extraction chute while flowing in the sorting cell 2 toward the discharge section 5. The mixed rice moving while being removed by the rotation of each disk 11 so that the brown rice enters the brown rice receiving trough 13, the proportion of paddy increases as it approaches the discharging portion 5, and the rice from the discharging portion 5 to the rice hull portion is increased. It flows out into the paddy supply hopper and is again deaerated.

In this case, among the unhulled rice or brown rice that did not fit into the recess 12 of each disk 11, those that collide with the radial surface of each disk 11 alternate between two adjacent disks 11, 11. Repeated collisions and bounces, and both disks 11,11
Along with the fact that it rotates upwards, it jumps up toward the upper side of both discs 11, 11 as shown by arrow B in FIG. 7, but the grain blocker 16 is arranged on the upper side. Therefore, the bounced brown rice and paddy on the lower surface thereof are disturbed and bounced back and fall into the original fluidized bed. Therefore, the unpolished rice gutter 13 is not mixed with paddy.

Among the mixed rice that does not fit in the recess 12 of each disk 11, the mixed rice that has been lifted to the upper part through the gap between the side surface of the grain blocker 16 and each disk 11 is the grain blocker. Body 16
On the upper surface side of the mixed rice gutter 16a, and these are fed back from the sideways-equipped reflux passage 18 with the screw conveyor 17 through the chute 19 to the reflux port 20 on the side of the supply unit 4 of the sorting cell 2 to select the sorting cell. The sorting process can be performed again in 2 and the sorting can be performed quickly and efficiently as compared with the case of returning from the discharging unit 5 to the hulling unit and then returning to the supply unit 4 side of the sorting cell. At the same time, the risk of crushing brown rice when returned to the hull portion is eliminated.

Needless to say, the disk 11 of the present invention can be applied to the case where the surface in the radial direction is formed into a conical shape that intersects the axis of the rotating shaft 10 at an acute angle of 90 degrees or less.

When the conical disk 11 is formed so that the surface side on which the recess 12 is formed faces the rotating shaft, the brown rice in the fluidized bed between the disks 11 and 11 easily fits into the recess 12. Also, since it becomes easy to be fried, by disposing the grain blocker between the adjacent discs, it is possible to further prevent the mixture of paddy into the brown rice gutter.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a side sectional view of a hull sorting machine, Fig. 2 is a sectional view taken along line II-II of Fig. 1, and Fig. 3 is taken along line III-III of Fig. 1. FIG. 4 is an enlarged plan view of an essential portion of the disk, FIG. 5 is a sectional view taken along line VV of FIG. 4, and FIG. 6 is an enlarged sectional view taken along line VI-VI of FIG. The illustration is for explaining the operation,
FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 2, and FIG. 9 is a sectional view taken along the line IX-IX in FIG. 2 ... Sorting cell, 4 ... Supply section, 5 ... Discharge section, 10 ...
Rotation axis, 11 …… Disk, 12 …… Concave, 13 …… Brown rice gutter, 15 …… Scraping board, 16 …… Grain blocker, 16a …… Mixed rice gutter, 17 …… Screw conveyor, 18 ...... Return passage, 19
...... Shoot, 20 ... Return port.

Claims (1)

[Claims] 1. A sorting cell at one end in the axial direction thereof,
A supply section for mixed rice of paddy and brown rice and a paddy discharge section at the other end are provided, and a plurality of donut-shaped disks each having a plurality of recesses formed on the surface are provided in the sorting cell in the axial direction. Are arranged at appropriate intervals so as to be supported by a rotating shaft extending in the direction of rotation, and in the sorting cell, brown rice gutters are provided between the upper portions of the respective discs on the side where the recesses of the respective discs move downward. In a disc rotary type grain sorting apparatus each of which is provided, between the upper part of each disc, the grain blocking which extends in the direction opposite to the direction in which each brown rice gutter extends on the side where the recess in each disc moves upward A disk rotating type grain sorting device characterized in that each body is arranged.