JPS6310842Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a grain sorting machine for sorting and removing fine grains such as immature grains and crushed grains while frying grains such as rice.

[Prior art]

Regarding this type of grain sorting machine, please refer to Japanese Patent Application Laid-open No. 58-
It has already been disclosed in JP-A No. 14976, JP-A-58-27676, and JP-A-58-27677.
As shown in Fig. 1, these grain sorting machines include a sorting net 1 that is rotatably installed upright, and a sorting net 1 that is fitted into the inside of the sorting net 1 and installed concentrically so that it can rotate in reverse. The grain frying spiral body 2 and the grain frying spiral body 2 are both installed inside the outer shell body 3.

The sorting net 1 has a cylindrical shape composed of a lower tube 4, an intermediate net tube 5, and an upper tube 6, and as shown in FIG.
The holes are drilled in an orderly manner in the direction of rotation. A grain frying spiral 2 is provided inside the sorting net 1 with the same rotating shaft 8 as the sorting net 1, and the rotating shaft 8 has a helical shaft 9.
The upper and lower ends thereof protrude on the same axis, and are rotatably supported by the outer shell 3.

The grain lifting spiral body 2 has a spiral blade 1 on the outer periphery of a spiral shaft 9.
0 is provided, and the spiral blade 10 acts on the supply area 11 where it faces the lower cylinder 4, acts on the sorting area 12 where it faces the mesh cylinder 5, and acts on the extraction area 13 where it faces the upper cylinder 6. It is organized by region. Further, the rotating shaft 8 at the lower end of the grain lifting spiral body 2 is connected to a drive motor 15 via a gear box 14, and the rotation of the grain lifting spiral body 2 is set to approximately 300 rpm, and the sorting net body 1 is rotated at approximately 30 to 70 rpm. It's rotating in reverse.

In the conventional fried grain sorting machine configured in this way,
When grains are supplied from the supply port 16, they fall into the lower cylinder 4, are raised by the supply area 11 of the spiral blades 9, and are fed and conveyed to the sorting area 12. In the sorting area 12, the supplied grains are scattered and discharged onto the screen cylinder 5 of the sorting net body 1 which rotates forward or backward. Small grains and the like pass through the mesh 7, are sieved out of the sorting net 1, and are discharged to the outside from the discharge port 17. On the other hand, the grains remaining in the sorting net 1 are gradually fried and reach the removal area 13. In the take-out area 13, the grains are fried to the top and taken out from the take-out port 18.

By the way, in the above-mentioned fried grain sorting machine, the perforation direction of the mesh of the sorting net is set to be long and thin parallel to the rotating surface of the sorting net, so when sorting, the grains are kept in a horizontally long state, that is, horizontally. It is necessary to hit the mesh in a relaxed state.

However, in conventional fried grain sorting machines, the grains to be fried take various postures, and furthermore,
Since grains are fried with a large amount filled between the spiral blades, their posture cannot be changed and they remain in contact with the mesh, so grains in positions other than horizontal remain unsorted. This results in a problem of poor selection rate.

[Purpose of invention]

The present invention was developed to solve the above-mentioned problems by shaking the grains during frying to bring them into a horizontal position, which is originally a stable position, so that they can be reliably sorted using a sorting net. The purpose of the present invention is to provide a fried grain sorting machine with improved sorting rate.

[Structure of the idea]

In order to achieve the above object, the present invention provides a cylindrical sorting net and a grain frying spiral fitted inside the sorting net so that they can rotate concentrically with each other, and In a grain sorting machine comprising an outer shell that covers the outside, a part with a large lead and a part with a small lead of the spiral blades provided on the outer periphery of the helical shaft of the grain lifting spiral body, at least in the sorting area. and are arranged alternately.

This invention changes the rising speed of grains during frying in a wave-like manner by alternately providing large and small lead parts for the spiral blades in at least the sorting area, thereby changing the packing density. The grains are repeatedly rocked, thereby bringing them into a horizontal position, which is essentially a stable position. As a result, it becomes possible to improve the sorting rate of the sorting network.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. The fried grain sorting machine of the present invention has the same structure as the conventional one except for the structure of the spiral blade. Therefore, FIG. 3 shows an example of the grain-frying spiral body used in the fried-grain sorting machine of the present invention, and other configurations will be explained with reference to FIGS. 1 and 2.

The fried grain sorting machine of the present invention includes a cylindrical sorting net 1;
Grain frying spiral body 2 fitted inside the sorting net body 1
0 are provided concentrically and rotatably with each other, and
It is constructed by erecting an outer shell 3 that covers the outside of the sorting net 1. Here, the other configurations except for the grain frying spiral body 20 are the same as those of the conventional structure as described above, and have already been explained, so the explanation will not be repeated.

As shown in FIG. 3, the grain lifting spiral body 20 has a spiral blade 22 provided on the outer periphery of a spiral shaft 21. Similar to the conventional structure, the spiral blade 22 supplies a portion facing the lower cylinder 4. The area 11 is divided into a sorting area 12 that faces the mesh tube 5, and a take-out area 13 that faces the upper tube 6.

The spiral blades 22 are arranged in the sorting area 12 so that the distance traveled by the spiral blades 22 for one rotation of the lead, that is, the helical shaft 21, alternates between large parts and small parts. Now, when the lead is l and the radius of the outer periphery of the spiral blade 22 is r, the angle θ formed by the spiral blade 22 with respect to a plane (horizontal plane) perpendicular to the helical axis 21 is given by the following equation.

θ=tan ⁻¹ l/ _2πr In this embodiment, as shown in FIG _. Now, let θ ₁₃ be near 0°, and in the sorting area 12, θ ₂ , θ ₄ , θ ₆ , θ ₈ , θ ₁₀ , θ ₁₂
is set to 20°, while θ ₃ , θ ₅ , θ ₇ , θ ₉ , and θ ₁₁ are set to 40°. Note that in conventional fried grain sorting machines, the value of θ is constant, usually 40°.

By using the grain frying spiral constructed in this manner, the grain grain sorting machine of the present invention changes the grain rising speed in a wave-like manner by changing the lead in the sorting area 12, so that each pitch of the spiral blade 22 is changed. The grain packing density in between repeats dense and dense conditions, and the grains are shaken. As a result, as many grains rise, they align themselves in a lateral position, which is essentially a stable position against gravity. Therefore, the mesh 7 is in an ideal state, the number of omissions in screening is reduced, and the screening rate is significantly increased.

In the above embodiment, the angle θ of the spiral blade in the sorting area is
Although a combination of 20° and 40° is used, it is of course not limited to this.

[Effect of idea]

As explained above, the present invention has the effect of improving the sorting rate by shaking the grains during frying to bring them into a horizontal position, which is originally a stable position, so that they can be reliably sorted by the sorting net. There is.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing a conventional fried grain sorter, Fig. 2 is a perspective view showing a sorting net used in the sorter, and Fig. 3 is a fried grain sorter used in the present invention. It is a front view showing an example of a grain spiral. 1... Sorting net body, 3... Outer shell body, 5... Net tube,
7...Mesh, 11... Supply area, 12... Sorting area,
13... Removal area, 2, 20... Grain frying spiral, 9,
21...Spiral shaft, 10,22...Spiral blade.

Claims (1)

[Claims for Utility Model Registration] A cylindrical sorting net and a grain frying spiral fitted inside the sorting net are provided concentrically and rotatably with each other. In a grain sorting machine comprising an outer shell that covers the grain raising body, a part with a large lead and a part with a small lead are separated from among the spiral blades provided on the outer periphery of the helical shaft of the grain raising spiral body, at least in the sorting area. A fried grain sorting machine characterized by being formed so as to be arranged alternately.