JPS6359380A - Cereal rougher - 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] <Industrial Application Field> This invention removes straw, ear fragments, and other impurities mixed in grains such as paddy rice and wheat brought in by farmers at rice centers and country elevators. This invention relates to a grain coarse separator that separates grains from grains using a rotating sieve.

<Conventional technology> Conventional technology? The rotary sieve of the roughing machine is integrated with the outer sieve screen or frame, and the sieve screen is unbalanced when replaced.

(Problem to be solved by the invention) Therefore, in order to use another rotary sieve with a different mesh size, it is necessary to remove the entire rotary sieve including the rotating shaft from the bearing and replace the sieve. It takes a lot of effort and time.

Therefore, usually both unhulled rice and wheat are coarsely screened using the same rotary sieve with the same size mesh, or because the impurities mixed in with the wheat are thicker and shorter than the impurities in the unhulled rice. Even if the unhulled rice is well sorted, when the wheat is roughly sorted, impurities may pass through the mesh and be mixed with the wheat and discharged.

Means for Solving the Problems> Therefore, the present invention is characterized in that the outer periphery of the rotary sieve is configured by detachably fixing a plurality of sieve screens divided into arc shapes to a frame integral with the rotating shaft. <Operation> Accordingly, the sieve screen fixed to the frame is removed, and another sieve screen of the same shape and size but different in size by #1 [] is fixed to form the outer periphery.

Embodiment In the illustrated embodiment, 1 is a hopper, 2 is a supply plate, and 3 is a hopper.
is a rotary sieve, and 4 and 5 are respective discharge ports for separated grains and impurities.

The central shaft 6 of the rotary sieve 3 serves as a frame, and in this embodiment has four spiders 7 of equal length that protrude radially at each end and at equal intervals in the circumferential direction in the middle thereof.
An arc-shaped mounting plate 8 is fixed to the tip.

The radius of curvature of the arc of each mounting plate 8 is the same as the outer diameter of the rotary sieve 3, and the direction of the arc is along the outer periphery of the rotary sieve.

For this purpose, the four corners of the 1/11 arc-shaped sieve screen 9 are fixed to the mounting plate of the spider at each end and the mounting plate of the intermediate spider with bolts IO screwed into the mounting plates, and thereby The outer periphery of the rotary sieve is constituted by a total of eight sieve screens 9 arranged in two rows per sheet.

Then, in order to facilitate the removal of the sieve and illumination 9, a window 12 with the same width as the rotary sieve is opened near the rotation 1 in the house sink 11 that houses the rotary sieve, and the window is usually closed with bolts, etc. Cover the window with the cover plate 13 fixed to the edge of the window.

As mentioned above, when wheat is roughly sorted using a rotary sieve with a mesh size suitable for unhulled rice, the sorting accuracy decreases. There are also types of wheat such as barley, wheat, and barley.

Therefore, the arc-shaped sieve screen 9 is prepared with a mesh of an appropriate size depending on the type of grain to be coarsely selected, such as for unhulled rice, barley, wheat, etc. The outer periphery of the rotary sieve is constructed by fixing a sieve mesh for wheat, and during the wheat harvesting period, the sieve mesh for paddy rice is removed and the sieve mesh for wheat is used to form the outer periphery.

To install this, remove the cover plate 13, insert your hand into the housing through the window 12, turn the rotary sieve by hand so that the bolt lO fixing the sieve screen is in your hand, and remove the bolt lO. All you have to do is take out the existing sieve screen outside the window and fix a new sieve screen in the same way, which is extremely easy.

Even if it is possible to improve the sorting accuracy by configuring the outer periphery of the rotary sieve with a sieve screen having meshes of the optimum size according to each type of grain, the rotation speed of the rotary sieve may vary depending on the type of grain. If the method is not suitable, the processing capacity will not be improved and the sorting accuracy will be reduced.

Therefore, in order to improve the throughput by rotating the rotary sieve at the maximum speed within the range of permissible sorting accuracy, it is recommended to rotate the rotary sieve using a known means that can adjust the speed arbitrarily, such as a motor with a speed machine. preferable.

<Effects of the Invention> According to the present invention, the outer periphery of the rotary sieve can be constructed by easily changing sieve screens with different mesh sizes, and the sorting accuracy and capacity can be improved depending on the type of grain to be coarsely selected. I can do something.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a rough separator according to an embodiment of the present invention; Fig. 2 is a front view of the sieve screen shown in Fig. 1; Fig. 3 is a partially enlarged view of the sieve shown in Fig. 1. Cross-sectional view of the mesh: In the figure, l is the hopper, 3 is the rotating sieve, 6 is its central axis, and 7
8 indicates a spider, 8 a mounting plate, and 9 a sieve screen.

Claims (2)

[Claims] (1) In a grain coarse separator that feeds grain from inside a hopper onto a cylindrical rotary sieve and separates impurities in the grain from the grain using the rotary sieve; A grain coarse separator characterized in that a plurality of sieve screens divided into arc shapes are detachably fixed to a frame. (2) A grain coarse separator according to claim (1), wherein the rotation speed of the rotary sieve is adjustable.