JPS6362551A - Rice-hulling selector - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hulling and sorting device that removes culms from rice using a hulling mechanism, and then separates and takes out only brown rice.

[Conventional technology]

JP-A-56-136688 as a prior art is
A sorting mechanism for sorting and taking out brown rice from the mixed rice after Jiffing is provided with a plurality of donut-shaped disks each having a number of recesses formed on a rotating shaft that is rotatably supported in a sorting cell. It is proposed to use a rotary disc sorting mechanism, each consisting of a brown rice receiving trough.

In this disc rotating sorting mechanism, the mixed rice supplied into the sorting cell is
When repeating the flow of rising to a height created by the rotation of the disk and then falling, the brown rice in this mixed rice fits into the recess in the disk and falls from a high position, making use of the fact that it falls from a high position. The brown rice is received in a brown rice receiving gutter provided between each disk and taken out.

[Problem that the invention seeks to solve]

However, in this kind of disk rotating sorting mechanism, when the mixed rice in the sorting cell flows as each disk rotates, the brown rice, which has an apparent heavy specific gravity, sinks to the inner bottom of the sorting cell, and the Since paddy with light specific gravity tends to separate and float to the top of the fluidized bed, if there is a large amount of mixed rice in the sorting cell and the fluidized bed of mixed rice is thick, the paddy will be separated. As the disk rotates, the rate at which brown rice enters the trough increases, reducing the accuracy of sorting brown rice.

Furthermore, as described in the above-mentioned publication, this type of disc rotating sorting mechanism supplies mixed rice to one end of the sorting cell and discharges paddy from the other end of the sorting cell. The thickness of the fluidized layer of mixed rice formed between the disks in the sorting cell is thicker on the supply side and thinner on the discharge side. As the supply of brown rice increases, the accuracy of sorting brown rice becomes unstable.

An object of the present invention is to solve the above-mentioned problems in a hulling sorting device that uses a disc rotating sorting mechanism for sorting brown rice.

[Means to solve the problem]

In order to achieve this objective, the present invention includes a rice hulling mechanism,
Hulling sorting system consisting of a disk rotary sorting mechanism that includes a plurality of donut-shaped disks each having a large number of recesses formed on a rotary shaft that is rotatably supported in a sorting cell, and a brown rice catcher provided between each disk. In the apparatus, the bottom plate of the sorting cell of the disk rotary sorting mechanism is configured to move downward in proportion to the amount of mixed rice in the sorting cell;
The bottom plate and the paddy supply amount regulating valve in the hulling mechanism,
The structure is such that the paddy supply amount regulating valve is closed by the downward movement of the bottom plate.

[Action/effect of the invention]

With this configuration, when the amount of mixed rice in the sorting cell of the disk rotary sorting mechanism increases, the bottom plate lowers, and the height of the top surface of the mixed rice fluidized bed decreases. The paddy supply amount control valve to the hulling mechanism closes in conjunction with the downward movement, reducing the amount of paddy supplied, which prevents the amount of mixed rice in the sorting cell from increasing. By increasing the amount of mixed rice in , it is possible to prevent the accuracy of sorting brown rice from decreasing, and furthermore, due to the downward movement of the bottom plate, the gap between the outer periphery of each disk and the bottom plate becomes larger. The mixed rice flows smoothly between the disks, reducing the difference in the thickness of the mixed rice fluidized bed between the disks. This eliminates the instability of sorting accuracy caused by

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire hulling and sorting device, and this hulling and sorting device 1 includes:
Inside the vertically long rectangular box body 2, there is a hulling mechanism 3 and a wind selection section 4.
The entire system is constructed by providing a disk rotation type sorting mechanism 5.

The hulling mechanism 3 is composed of a paddy supply hopper 6, seven pairs of right and left dehulling rolls 7, etc., and is located in the middle of the rectangular box body 2, and the paddy supply hopper 6, A paddy supply amount regulating valve 8 is provided between both the culling rolls 7.

The wind sorting section 4 is located at the lower part of the hulling mechanism 3, and is configured to sort the scraped rice after culling into rice husks and mixed rice, and send the mixed rice to the disc rotating sorting mechanism 5. It is composed of a grain flow board 9, a mixed rice receiving trough 10 with a spiral conveyor 11, a suction dust removal fan 12, etc., and at one end of the mixed rice receiving trough 10, a disc rotating type sorting mechanism 5 is provided for distributing the mixed rice. A mixed rice thrower 13 is connected to the mixed rice thrower 13 for sending the mixed rice to the
Rotationally driven by 4.

The disk rotary sorting mechanism 5 includes a sorting cell 15 in which at least a bottom plate 15a is formed into a cylindrical shape, and the sorting cell 15 includes a side plate 1 at one end in the axial direction.
A supply hole 16 is bored in the side plate 15c at the other end, and a discharge hole 17 is bored in the side plate 15c at the other end.Inside the hopper 18 connected to the supply hole 16, the tip of the mixed rice thrower 13 opens, while the discharge hole 17 is bored in the side plate 15c at the other end. A recirculation chute 19 is connected to the hole 17 for recirculating the paddy discharged from the discharge hole 17 into the paddy supply humper 6 in the hulling section 3.

Inside the sorting cell 15, a rotary shaft 2o that is rotated at an appropriate speed by the motor 14 is supported in parallel with the axis of the sorting cell 15. A donut-shaped disk 2 in which a large number of recesses 22 are engraved with dimensions such that round rice cannot fit into it.
A plurality of discs 1 are provided at appropriate intervals in the axial direction (however, the drawing shows a case where recesses 22 are carved on both sides of the disc 21).

Note that each of the multiple recesses 22 in each disk 21
As shown in FIGS. 4 to 6, the disk 21 has an elliptical shape in which the circumferential length dimension is larger than the radial width dimension S, and the radial width dimension S is ,
It is set to be smaller than the length dimension of brown rice and larger than the width dimension of brown rice, and is located on the front side with respect to the disk rotation direction among both the left and right inner surfaces 22a and 22b in the longitudinal direction of each recess 21. The inner surface 22a is formed as an inclined surface at an appropriate angle θ (for example, about 15 degrees), and the other inner surface 2
The length dimension L1 up to 2b is approximately equal to the length dimension of brown rice, and the length dimension L1 is set to an intermediate length dimension between the length dimension of brown rice and the length dimension of paddy. The depth T is set to be approximately equal to the diameter of brown rice.

Brown rice receiving troughs 23 are inserted in an inclined manner in the upper portions between the disks 21 and the upper portions between the disks 21 and the side plates 15b, 15C of the sorting cell 15.
The upper surface of 3 communicates with a brown rice sorting section 26 with a brown rice take-out chute 27 via the upper surface of the brown rice flow down plate 24.

On the other hand, the suction side of the suction dust exhaust fan 12 in the wind sorting section 4 communicates with the brown rice wind sorting section 26 and the sorting cell 15 through an air passage 28 formed in the rectangular box l, and The suction air to the dust exhaust fan 12 is also sucked from the sorting cell 15, so that the inside of the sorting cell 15 is ventilated and the brown rice is finished and sorted.

One end of the bottom plate 15a of the sorting cell 15 is rotatably connected via a pin 29, and the bottom plate 15a is supported by a spring 30.
5a is configured to move downward when the amount of mixed rice in the sorting cell 15 increases, while this bottom plate 15a and the paddy t! The paddy supply amount control valve 8 in the mechanism 4 is connected to the bottom plate 1.
The paddy supply amount regulating valve 8 is linked by mechanical means such as a link mechanism 31 or electrical means so that the paddy supply amount regulating valve 8 is closed by the downward movement of the valve 5a.

Therefore, when paddy is supplied into the paddy supply hopper 6 in the hulling mechanism 3 during the hulling and sorting work, the husked rice that has been dehulled in the hulling mechanism 3 is removed from the rice husk by the suction dust exhaust fan 12 in the wind selection section 4. The mixed rice from which the rice husks have been removed by air sorting enters the mixed rice receiving trough 10, and is passed through the mixed rice thrower 13 into the sorting cell 15 of the disc rotary sorting mechanism 5. is supplied from the supply hole 16.

The mixed rice thus supplied into the sorting cell 15 is
As the disks 21 rotate in the area between each disk 21, the disks 21 are lifted up to a height as shown by the double-dashed arrow A in FIG.
It is transferred toward the discharge hole 17.

During this flow, the brown rice in the mixed rice is
Each brown rice receiving trough 23 falls by falling from the recess 22 after being lifted up to a high position by fitting into the recess 22 in the
People are sorted out like this.

The brown rice that has entered each brown rice receiving member 23 in this way is subjected to finishing wind selection in the brown rice wind sorting section 26, and then taken out of the machine from the brown rice take-out chute 27, while being taken out from the sorting cell 15.
The mixed rice flowing inside toward the discharge hole 17 is caused by the rotation of each disc 21, causing the brown rice to flow into each brown rice receiving trough 23.
As a result, the ratio of paddy increases as it approaches the discharge hole 17, and it flows out from the discharge hole 17 into the paddy supply hopper 6 of the hulling mechanism 3, where the culling action is performed again. be.

In this case, when the amount of mixed rice in the sorting cell 15 of the disk rotary sorting mechanism 5 increases, the sorting cell 15
When the bottom tffi 15a moves downward against the support spring 30 as shown by the two-dot chain line, the gap between the outer peripheral surface of each disk 21 and the bottom plate 15a widens.
The mixed rice flows smoothly between the disks 21, and the lowering movement of the bottom plate 15a lowers the height of the top surface of the mixed rice fluidized bed. In conjunction with the downward movement, the paddy supply amount joint valve 8 in the hulling mechanism 3 closes, and the amount of paddy supplied is reduced.

Although not related to the present invention, the following two methods can be used to control the amount of paddy supplied to the hulling mechanism 3 according to the amount of mixed rice in the sorting cell 15 of the disk rotary sorting mechanism 5. There are two methods.

That is, the first means is to provide two grain detection sensors 32.33 in the sorting cell 15 with an appropriate amount of height in between, as shown in FIG.
33 is operated via a control circuit 34 in connection with the paddy supply amount regulating valve 8 in the hulling mechanism 3 to open the paddy supply amount regulating valve 8 when the lower sensor 33 of both sensors does not detect grains. However, when the upper sensor 32 detects grains, the paddy supply amount control valve 8 is closed and operated.

Further, the second means includes a sorting cell 15 as shown in FIG.
By providing a plurality of grain detection sensors 35 at appropriate height pitches and relating each grain detection sensor 35 to the paddy supply amount regulating valve 8 in the hulling mechanism 3 via the control circuit 36, The amount of mixed rice in the sorting cell 15 is controlled at an arbitrary height position of the sensor 35.

[Brief explanation of drawings]

1 to 6 show embodiments of the present invention, FIG. 1 is a longitudinal sectional front view of a rice huller sorter, FIG. 2 is an enlarged sectional view of the n-ff visual resistance of FIG. 2 is a cross-sectional view taken along line mm in Figure 2, Figure 4 is an enlarged plan view of the main parts of the disk, Figure 5 is a cross-sectional view taken along line V-V in Figure 4, and Figure 6 is a view taken along 'ITIT-Vl in Figure 4. The cross-sectional views of FIGS. 7 and 8 are cross-sectional views of other devices. 2... Rectangular box body, 3... Husking mechanism, 8...
...Paddy supply amount control valve, 4...Wind sorting section, 5...Disc rotary sorting mechanism, 15...Sorting cell, 15a
... Bottom plate of sorting cell, 16 ... Supply hole, 17.
...Discharge hole, 20...Rotating shaft, 21...Disk, 22...Recess, 23...Brown rice receiving gutter. Patent Comparison Person Seirei Kogyo Co., Ltd.

Claims (1)

[Claims] (1) A paddy hulling mechanism, a rotary shaft supported in a sorting cell, and a plurality of donut-shaped disks each having a number of recesses formed therein, and a brown rice receiving trough between each disk. In a hulling sorting device comprising a disk rotating sorting mechanism, the bottom plate in the sorting cell of the disk rotating sorting mechanism is configured to move downward in proportion to the amount of mixed rice in the sorting cell, and the bottom plate and a paddy supply amount regulating valve in the hulling mechanism are interlocked so that the paddy supply amount regulating valve is closed by the downward movement of the bottom plate.