JPH07110348B2 - Disc rotating type grain sorting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention selects brown rice from mixed rice after hulling by rotating a plurality of donut-shaped disks each having a large number of recesses on the surface. The present invention relates to the structure of the grain selection device.

[Conventional technology]

In the sorting cell, the rotary shaft is rotatably supported in a substantially horizontal direction, and the rotary shaft is provided with a plurality of donut-shaped discs each having a plurality of recesses formed on one or both sides in the axial direction at appropriate intervals, The sorting cell is provided with a portion for supplying mixed rice of paddy and brown rice at one end in the axial direction thereof, and a portion for discharging paddy at the other end,
Further, a disk rotary type grain sorting device in which brown rice gutters are provided between the respective disks has been proposed by Japanese Patent Laid-Open Publication No. 56-136688 as a prior art.

In the disc rotating type grain sorting device, the mixed rice fed from the feeding unit 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. When repeated flowing, the brown rice in this fluidized bed was fitted into the recess in the disc and dropped from a high position, so that the brown rice falling from a high position was received by the brown rice gutter and taken out. It is a thing.

[Problems to be solved by the invention]

Therefore, in this type of grain sorting device, among the mixed rice in the fluidized bed between the discs, brown rice or paddy that could not be received by the brown rice gutter in each disc is a hole on the inner diameter side of the donut-shaped disc or If the fluid flows from the gap between the outer diameter of each disc and the bottom surface of the sorting cell toward the paddy discharge side, it will not return to the supply section side anymore. There is little chance of contact with the disc, and the disc will flow to the discharge side without being affected by the sorting effect, and the rate of mixing brown rice into the paddy released from the discharge side will be high, improving the sorting efficiency. There was a problem that it would be difficult.

The present invention aims to solve this problem.

[Means for solving problems]

In order to achieve this object, the present invention provides a "doughnut-shaped disk in which a rotary shaft is arranged in a substantially horizontal shape in the body of a sorting cell, and a large number of recesses are formed on the surface of the rotary shaft. While providing a plurality of sheets at appropriate intervals, the sorting cell is provided with a rice feed portion for mixed rice with paddy and brown rice at one end thereof, and a paddy discharge portion at the other end thereof, and brown rice is provided between each disc. In a disc rotary type grain sorting device formed by arranging a gutter, between a pair of discs adjacent to each other,
At the site on the front side of the brown rice gutter with respect to the rotation direction of the disc, the mixed rice lifted by the rotation of the pair of discs is provided at a position between the discs located closer to the supply unit than between the pair of discs. Provide a return gutter configured to return. "

[Operation and effect of invention]

The fluidized bed of the mixed rice between the pair of facing donut-shaped disks is largely lifted upward by the rotation of the disks, and brown rice among the mixed rice enters the brown rice trough,
The mixed rice that has not entered the brown rice gutter usually falls down and mixes in the fluidized bed thereunder, or easily flows to the discharge side.

According to the present invention, by providing a return gutter between the pair of discs, the mixed rice that has been lifted by the pair of discs and dropped in front of the brown rice receiving gutter is received by the return gutter, and the return gutter is also provided. Is configured to return the mixed rice to a position between the disks located on the supply side rather than between the pair of disks where the return gutter is arranged. Part of the fluidized bed can be subjected to the sorting effect, such as returning to the part side and scooping up brown rice in the recess on the disc surface at that location, greatly increasing the sorting ability of the sorting device It has a remarkable effect that it can be improved.

〔Example〕

Hereinafter, the drawings of the examples in which the present invention is applied to a grain sorting device in a hull sorting machine will be described. The disk rotary sorting device 1 removes hulled rice after removing the hulled rice in a hulling portion (not shown). After the mixed rice, which has been sorted into rice and mixed rice by wind sorting, is sorted into brown rice and paddy by a horizontally arranged disk 11 in the body 2c of the sorting cell 2, the sorting cell 2, a supply portion 4 is formed on one side plate 2a and a discharge portion 5 is formed on the other side plate 2b.

The hopper 6 connected to the supply unit 4 is connected to the mixed rice thrower from the wind selection unit, while the discharge unit 5 supplies the paddy discharged from the discharge unit 5 to the paddy in the paddy section. A recirculation chute 7 for recirculating into the hopper is connected.

A remaining rice discharge valve 9 is provided on the bottom surface of the body 2c 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 supported in parallel with the axis of the sorting cell 2 on both left and right side plates 2a and 2b in a substantially horizontal manner.
Is a donut-shaped disk 11 having a large number of recesses 12 engraved on one side or both sides of which brown rice fits but not paddy, and a plurality of donut-shaped discs 11 are provided at appropriate intervals in the axial direction. (However, the drawing shows the case where the recesses 12 are formed on both sides of the disk 11.)

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 dimension L in the circumferential direction of the disk 11 is made larger than the width dimension S in the radial direction of the disk 11, and the width dimension S in the radial direction thereof.
Is set to be smaller than the length dimension of brown rice and larger than the width dimension of brown rice, while one of the left and right inner side surfaces 12a, 12b in the longitudinal direction of each recess 12 is located in front of the disc rotation direction. The inner side surface 12a located on the inclined inner surface 12a is formed as an inclined surface having an angle θ (for example, about 15 degrees).
The length dimension L1 from the intersection of a and the bottom surface 12c to the other inner side surface 12b is substantially equal to the length dimension of brown rice, and the L is an intermediate length between the length dimension of brown rice and the length dimension of paddy. The depths T of the recesses 12 are set to be substantially equal to the diameter of the brown rice.

Above the discs 11 and between the discs 11 and both side plates 2a, 2b of the sorting cell 2, a brown rice gutter 13 has its upper end located on the upper end side of the disc 11 and its lower end side. The recess 12 of the disk is inserted in an inclined manner so that it is located on the side that moves downward, and the lower end of each brown rice gutter 13 communicates with the brown rice picking section (not shown) from the brown rice extraction shute 15. ing.

The donut-shaped discs 11 are disposed between the discs 11 at upper and lower midpoints between the upper surface of the fluidized bed A of the mixed rice formed between the discs 11 and the lower surface of the brown rice gutters 13.
A return gutter 16 is inclinedly arranged at a portion on the mixed rice lifting side by 11, that is, a portion on the front side of the brown rice receiving gutter 13 with respect to the rotation direction of the disk 11.

Each of the return gutters 16 has its upper end positioned closer to the outer circumference of the disc on the side of lifting the mixed rice by the disc 11, extends the lower end of the return gutter 16 radially inward from the inner diameter edge 11a of the disc 11, and further The cross section is as shown in FIG.
On the discharge portion side, a vertical lip portion 16a that is substantially along the rotation surface of the disk 11 is formed into a substantially L shape so that the upper surface becomes a flow plate portion 16b that is inclined obliquely downward toward the supply portion 4 side. The mixed rice that is formed and dropped by rotating both the disks 11 and 11 on the left and right sides of the return gutter 16 and drops toward the front side of the brown rice receiving trough 13 is supplied to the feeding portion 4 of the pair of adjacent disks 11. One of the discs 11 located on the side facing the supply unit 4, in other words, one disc 11, 11 closer to the supply unit 4 than the pair of discs 11, 11 on which the return gutter 16 is disposed.
It is configured so that it is returned between 11th.

Reference numerals 17 and 18 are stays for supporting the return gutters 16 with respect to the body portion 2c of the sorting cylinder or the brown rice receiving gutter 13.

Then, the slid-down rice removed in the hulling section is wind-selected in the wind-selecting section so that the grain is sucked into the suction / dust fan. The mixed rice from which the hulls have been removed by the wind selection is supplied from the supply unit 4 in the one side plate 2a or the like into the selection cell 2 from the mixed rice thrower.

The mixed rice thus supplied into the sorting cell 2 flows so as to fall between it and the rotating disk 11 after being lifted up to a certain height as shown by the one-dot chain line arrow in FIG. While forming the fluidized bed A, the fluidized bed A is transferred toward the discharge section 5.

Then, the brown rice in the mixed rice is dented in the recess 12 in each disk 11.
It is picked up so as to enter the brown rice gutter 13 by falling from the recess 12 after being lifted up to a high position.

During this flow, the mixed rice dropped on the front side of the brown rice receiving gutter 13 drops on the upper surface of the return gutter 16 and the return gutter 16
It slides up and is returned from the vicinity of its lower end to the entire surface of the disk 11 on the side close to the supply source 4 facing the supply portion 4.

Therefore, since the returned mixed rice can be subjected to the sorting action again by the rotation of the pair of disks 11, 11 in the fluidized bed A at the returned position, when it returns to the discharge side without returning. In comparison, the sorting ability of the sorting device can be greatly improved.

If the lower surface of the flow plate portion 16b of each return gutter 16 is formed so as to be inclined toward the rotating surface having the recess 12 in one of the pair of disks 11, 11,
The upper surface of the fluidized bed A, which is lifted upward, bounces off due to the laterally inclined lower surface of the flow plate portion 16b, and a component force of moving in the direction of the recess 12 is given, so that brown rice is easily fitted into the recess.

Further, each of the donut-shaped disks 11 may have a shape in which the rotating surface on which the recess 12 is formed is inclined at a right angle with respect to the axis of the rotating shaft 10.

Further, a part of the mixed rice lifted up by the return gutter 16 is returned between the disks on the side closer to the supply section. Therefore, when the return gutter 16 is arranged between all the disks 11, a fluidized bed A between the disks is provided. It is possible to improve the degree to which the thickness of the is gradually decreased toward the discharge portion side.

Further, the return gutter according to the present invention may be provided between a pair or a plurality of pairs of disks close to the supply unit.

[Brief description of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is an I-I of FIG.
FIG. 2 is a vertical sectional front view of the sorting apparatus shown in FIG.
II sectional view, FIG. 3 is an enlarged sectional view taken along line III-III of FIG.
4 is an enlarged plan view of an essential part of the disk, FIG. 5 is a sectional view taken along line VV of FIG. 4, and FIG. 6 is a sectional view taken along line VI-VI of FIG. 2 ... Sorting cell, 2a, 2b ... Left and right side plates, 2c ... Sorting cell body, 4 ... Supply section, 5 ... Ejection section, 10 ... Rotating shaft, 11 ... Disc, 12 ... Recess, 13 …… Brown rice gutter, 16
...... Return gutter, 16a …… Lip part, 16b …… Flow plate part, 17,18
...... Stay.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-63-91179 (JP, A) JP-A-63-39672 (JP, A) JP-A-63-39671 (JP, A) JP-A-58- 36686 (JP, A) JP 56-136688 (JP, A) Actual public 33-2256 (JP, Y1) Actual public 58-42064 (JP, Y2) Patent 39385 (JP, C1)

Claims (1)

[Claims] 1. A doughnut-shaped disc having a plurality of recesses formed on the surface thereof is provided at a proper interval on the rotary shaft, wherein the rotary shaft is disposed in a substantially horizontal shape in the body of the sorting cell. On the other hand, the sorting cell is provided with a supply unit of mixed rice of paddy and brown rice at one end thereof and a paddy discharge unit at the other end thereof, and a brown rice gutter is provided between each disc. In the disc rotary type grain sorting device consisting of, between any pair of adjacent discs, lifted by rotation of the pair of discs at a site on the front side of the brown rice gutter in the rotation direction of the discs. A disc rotary type grain sorting device, characterized in that a return gutter configured to return the mixed rice to a position between the discs located closer to the supply unit than between the pair of discs is provided.