JPS6144552B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sorting device for sorting brown rice from mixed rice after hulling.

[Conventional technology]

A rotary sorting cylinder having a number of concave portions formed on its inner peripheral surface is installed horizontally, and one end of the rotary sorting cylinder has a supply section for a mixture of brown rice and paddy, and the other end has a paddy discharge section. A rotary grain sorting device in which a brown rice receiving trough with an open top surface extending in the axial direction of the sorting barrel is disposed inside the rotary sorting barrel is disclosed in Japanese Patent Application Laid-Open No. 49-1991 as a prior art. -Disclosed in Publication No. 24746.

[Problem that the invention seeks to solve]

In this rotary grain sorting device, the mixed rice supplied into the sorting barrel is scraped up to a certain height by the rotation of the sorting barrel, and then falls to the bottom.The rice is then repeatedly flowed to the bottom, forming a layer as it flows to the discharge side. During the movement of the mixed rice, the brown rice fits into the recess and is lifted up to a high position and then falls, while the paddy of the mixed rice falls from a lower position than the brown rice. The brown rice that falls from a high position is caught in the brown rice catcher and taken out.
When paddy fits into the recess in the rear half of the sorting barrel near the discharge side, the paddy is often lifted up to a considerable height and enters the brown rice receiving trough, resulting in low brown rice sorting accuracy.

The present invention solves the above-mentioned problems in the rotary grain sorting device disclosed in the publication as the prior art.

[Means for solving problems]

Therefore, in the present invention, a rotary sorting cylinder having a plurality of concave portions formed on the inner circumferential surface is installed horizontally, and a supply part for mixed rice of brown rice and paddy is provided at one end of the rotary sorting cylinder, and a supply part for mixed rice of brown rice and paddy is provided at the other end of the rotary sorting cylinder. In the rotary grain sorting device, the rotary grain sorting device is provided with a paddy discharge section in each of the rotary sorting barrels, and a brown rice receiving trough with an open top surface extending in the axial direction of the sorting barrel is arranged in the rotary sorting barrel. Inside the sorting cylinder, a mixed rice receiving gutter with an open top is provided between a section of the sorting cylinder extending from a part near the discharge part in the axial direction to the discharge part, and the outlet of the mixed rice receiving gutter is connected to the It is configured to communicate with the supply section in the sorting cylinder.

[Action/effect of the invention]

By providing the mixed rice receiving trough in the rear half of the sorting barrel in the axial direction, the ratio of paddy in the mixed rice in the sorting barrel increases in the latter half of the sorting barrel in the axial direction. As the frequency of paddy stuck in the recesses increases, the paddy lifted up while stuck in the recesses enters the mixed rice catcher installed in the rear half of the sorting barrel in the axial direction together with the brown rice. Since the rice is returned to the supply side of the sorting cylinder, it is possible to avoid a decrease in sorting accuracy caused by an increase in the proportion of paddy in the mixed rice in the rear half of the sorting cylinder in the axial direction, as in the prior art. This makes it possible to improve the sorting accuracy for brown rice in the mixed rice.Moreover, the present invention is capable of sending the unhulled brown rice that has entered the mixed rice receiving trough to the mixed rice supply section in the sorting barrel. , to be re-selected,
Since the proportion of brown rice in the mixed rice discharged from the discharge section of the sorting cylinder is reduced, damage to the brown rice that occurs when the discharged mixed rice is dehulled again at the hulling section can be reduced, and furthermore, Since there is less risk of poor sorting in the latter half of the sorting barrel, the amount of brown rice taken into the brown rice receiving trough in the first half of the sorting barrel can be increased, which also has the effect of improving the sorting ability.

〔Example〕

Below, the drawings of an embodiment in which the present invention is applied as a sorting device in a rice hulling sorter will be explained. Fig. 1 shows a front view of the entire hulling and sorting machine D, and the hulling and sorting machine D has a long Box-shaped wind selection part d1
The whole is constituted by a hulling section d2 mounted on the upper surface of the wind sorting section d1, and a rotary sorting device F.

In the wind sorting section d1, there are a No. 2 conveyor 3, a mixed rice conveyor 4, a paddy conveyor 5, and a brown rice conveyor 6.
are arranged respectively, and a small rice storage part 12 is provided,
In addition, at one end of the wind selection section d1, a suction port 8 of the suction dust ejector 7 draws atmospheric air from the suction ports 9, 10, 11 to the conveyors 3, 4, 5, 6 and the rice storage section 1.
A mixed rice thrower 15 is installed at one end of the mixed rice conveyor 4, which is opened to communicate with the upper side of the brown rice conveyor 6, and a brown rice thrower 17 is installed at one end of the brown rice conveyor 6. A paddy thrower 16 is connected to one end of each.

The hulling section d2 is equipped with a paddy supply hopper 14 and a pair of unrollers 13, and the unroller 13 is located above the mixed rice conveyor 4, while the unroller 13 is located above the rice mixing conveyor 4.
Look into the top exit of No.6.

The rotary grain sorting device F consists of a case 18 and a sorting cylinder A that is open at both ends and placed horizontally inside the case 18. It is placed so as to be in contact with four drive wheels 19, 19 arranged on both the left and right sides,
It is rotatably supported with pressing rings 21, 21 in contact with the upper ends of both ends, and a large number of recesses 1, 2 are formed on the inner circumferential surface of the sorting cylinder A, each of which is large enough to fit the brown rice. ing. In this case, among the large number of recesses, the recess 2 in the latter half of the sorting cylinder A from part RO to discharge side C nearer to the discharge side C in the axial direction of the sorting cylinder A is The inner diameter and depth are formed to be slightly larger than the recess 1 between B and the supply side A. Of course, the inner diameter and depth of the recess may be formed to gradually increase from the supply side A to the discharge side C, as shown in FIG.

A tank 22 provided above one end of the case 18
, the upper end outlet of the mixed rice thrower 15 is visible, and the lower outlet of the tank 22 is visible inside the supply side A at one end of the sorting cylinder A, and below the discharge side C at the other end of the sorting cylinder A. The said paddy conveyor 5
A gutter 23 is provided which communicates with the.

Inside the sorting cylinder A, there are a brown rice receiving gutter B and a mixed rice receiving gutter C extending substantially parallel to the axial direction of the sorting cylinder A, and the mixed rice receiving gutter C extends from the part A to the discharge side C. These two receiving gutter B,
Each of C has a funnel-shaped cross section with an open top and is fixed to the case 18, and the brown rice that enters into the brown rice receiving trough B is directed toward the end N of the supply side A of the sorting cylinder A. A spiral conveyor 28 is provided, and the end part 28 is connected to the brown rice conveyor 6 through a falling gutter 34 and a grain board 35.
A spiral conveyor 29 is provided in the mixed rice receiving trough C to convey the brown rice entering therein toward the end H of the discharge side C of the sorting cylinder A as shown by the arrow R. , its end portion E communicates with the mixed rice conveyor 4 via a gutter 36.

In addition, the sorting cylinder A is driven by belt transmission from a pulley 38 fitted on the output shaft of a gear box 37 to which power is transmitted from the motor M provided in the wind selection section C to the rotating shaft 20 of the drive wheels 19, 19. is rotated in the left direction of the arrow, while the belt is also transmitted to the common shaft 26 for the spiral conveyor 28 in the brown rice receiving trough B and the spiral conveyor 29 in the mixed rice receiving trough C, so that both spiral conveyors 28, 29 is driven to rotate.

In addition, 27 indicates a partition plate for separating the mixed rice receiving trough C and the brown rice receiving trough B, and above the partition plate 27 is a partition plate mounted on the case 18 parallel to the axis of the sorting cylinder A. A guide plate E is provided which is configured to be movable in the axial direction of the sorting cylinder by two guide rods 30, 30, and this guide plate E has a threaded shaft 32 mounted on the case 18 at its female threaded portion 31. By screwing together the guide plate E and turning the threaded shaft 32 with a handle 33 outside the case 18, the guide plate E can be moved back and forth as shown by the arrow N. Further, reference numeral 24 in the figure is an adjustment gate valve attached to a shaft 25 rotatably mounted to the case 18.

During operation, when paddy is supplied to the supply hopper 14, the mixed rice that has escaped from the hulling section d2 is
After the rice husks are removed by the wind flowing toward the suction port 8 of the suction dust extractor 7, it enters the mixed rice conveyor 4, and this mixed rice is passed from the mixed rice conveyor 4 through the mixed rice thrower 15 and the tank 22. , are supplied to the supply side A in the sorting cylinder A.

The mixed rice that has entered the sorting cylinder A in this way is
As the sorting cylinder A rotates to the left in the direction of the arrow, it is scraped up to a certain height and then falls to the bottom, repeating the flow until it reaches the other end of the sorting cylinder A, as shown by the arrow C in Figures 2 and 4. It is transferred towards the discharge side C.

During this flow, the brown rice in the mixed rice is fitted into the recess 1 on the inner surface of the sorting cylinder A and is lifted up to a higher level than the paddy, and then falls from the recess 1 and enters the brown rice receiving trough B.

The brown rice that has entered brown rice receiving channel B in this way is
The brown rice is sent through the spiral conveyor 28 in the brown rice receiving gutter B to the exit side as shown by the arrow G, passes through the falling gutter 34 and the grain board 35, reaches the brown rice conveyor 6, and from there is sent out of the machine by the brown rice thrower 17. taken out.

On the other hand, the mixed rice in the sorting cylinder A is sorted so that the brown rice therein enters the brown rice receiving channel B as described above, and as it is transferred toward the discharge side C, the proportion of paddy increases. As a result, the frequency of paddy fitting into the recess 1 on the inner surface of the sorting cylinder A increases, and the number of paddy lifted to a high place increases. A mixed rice receiving trough C is provided in the latter half between section RO and discharge side C, so that the paddy lifted to a high place enters this mixed rice receiving trough C together with the brown rice. In the second half, the brown rice in the mixed rice flowing in the sorting cylinder is sorted so that it enters the mixed rice receiving trough C, so the sorting cylinder A
The amount of brown rice in the mixed rice flowing out to the paddy conveyor 5 via the gutter 23 from the discharge side C can be reduced.

The brown rice and paddy that have entered the mixed rice receiving trough C as described above are sent from the trough 36 to the mixed rice conveyor 4 by the spiral conveyor 29 in the mixed rice receiving trough C, and then sent to the mixed rice conveyor 4. The mixed rice thrower 15 in communication is sent to the supply side A of the sorting cylinder A and sorted again. On the other hand, the mixed rice with a large amount of paddy flowing out from the discharge side C of the sorting cylinder A to the paddy conveyor 5 is transferred to the paddy supply hopper. 14, and the cycle of deactivation is repeated again.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of the entire huller sorting machine, FIG. 2 is a longitudinal sectional front view of FIG. The figure is a sectional view of the sorting cylinder in FIG. 2, and FIG. 5 is an enlarged plan view of a recessed portion on the inner surface of the sorting cylinder. A...Sorting barrel, 1, 2...Concave portion, B...Brown rice receiving trough, C...Mixed rice receiving trough, A...Mixed rice supply side, C...Discharge side.

Claims (1)

[Claims] 1. A rotary sorting cylinder with a number of concave portions formed on its inner circumferential surface is installed horizontally, and one end of the rotary sorting cylinder has a supply section for a mixture of brown rice and paddy, and the other end has a paddy discharge section. In a rotary grain sorting device, a brown rice receiving trough with an open top surface extending in the axial direction of the sorting barrel is installed in the rotary sorting barrel, and , a top-open mixed rice receiving trough is provided between a section of the sorting cylinder from a part near the discharge part in the axial direction to the discharge part, and the outlet of the mixed rice receiving trough is connected to the supply part of the sorting cylinder. A rotary grain sorting device characterized by communicating with.