JPS5951356B2 - Grain size sorting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a particle size sorting device for grains, and involves forming a large number of recessed holes on the surface of a suspended and rotating annular particle sorting zone to reduce the overall size of the device. By increasing the scale, the bottom wall of the pot hole is made of a thin elastic material, and by slightly deforming it from time to time, we prevent clogging of the pot hole with large particles similar to the pot hole and ensure a stable sorting action. The purpose is to

Conventionally, when sorting grains by size, for example, when sorting a mixture of whole rice grains and crushed rice grains, an iron plate with a large number of bottomed holes is exposed on the inner periphery of a cylinder, When this cylinder is rotated, large particles fall out of the pot hole early due to the inclination angle of the inner surface of the cylinder, and small particles remain in the pot hole for a long time, and the drop-off position with large particles changes, so the receiving gutter installed at the drop-off position It is customary to take out small particles and carry them out of the machine for particle size sorting.

It is common sense to use a porous wall for grain size sorting, but when separating whole rice grains from broken rice grains, the rice grains have the same thickness and width, but only differ in length, so a normal porous wall is used. Sorting is impossible. Conventionally, such raw materials are sorted by rotating a cylinder made of iron plate with many potholes protruding on the outer periphery on a horizontal or oblique axis, as described above, but the approximation size of just touching the potholes is A common defect is that the particles fit into the pot hole and cannot escape, resulting in clogging, and eventually the sorting surface is completely destroyed, making sorting impossible. To explain the present invention with reference to an example, a large number of bottomed pot holes 4 are inserted into the surface of an annular grain sorting zone 3 which rotates and is suspended in an inclined manner between pulleys 1 and 2 mounted diagonally above and below. A hopper 8 for grain feeding is mounted on the roof surface of the annular grain sorting zone 3 suspended in an inclined manner. A cleaning device 9 such as a brush is provided in contact with the portion of the pot hole 4 exposed on the surface of the grain sorting zone 3. According to the present invention, when a mixture of large and small grains is fed from the grain feeding hopper 8 to the roof of the grain sorting zone 3, large grains move up and down on the roof surface of the grain sorting zone 3, and even if they are once inserted into the pot hole 4, , it finally escapes out of the pot and flows down the slope.

In addition, small particles of broken rice are fed upward while being fitted into the pot hole 4, and when they reach the curved part of the pulley 1, they are ejected from the pot hole 4 and fall off. At this time, the bottom wall 5 of the pot hole 4 is pushed out into the pot hole 4 by the pulley surface, distorting the bottom wall 5, so the broken rice fitted in the pot hole 4 will definitely escape and clogging will be absolutely prevented. Therefore, the pot hole 4 can be constantly cleaned and stable efficiency of the sorting action can be ensured. Depending on the degree of elastic elongation of the annular granule sorting body 3 of the present invention, an electric control belt 7 made of metal, fiber, rubber, etc. with high tensile strength is attached to the back surface of the granule sorting belt 3 and suspended on the pulleys 1 and 2. can do.

In this case, when the grain sorting zone 3 contacts the pulleys 1 and 2 and curves along the circumference of the pulleys 1 and 2, the pot hole protrusion 6 located on the inner peripheral surface of the grain sorting zone 3 Due to the pressure of the outer circumferential surface, which has a higher elongation rate than the inner circumference of the transmission belt 7, it is pressed against the outer circumferential surface of the transmission adjustment band 7 and is slightly pushed into the pot hole 4 and protrudes. This prevents the particles from falling out of the hole and stretching and loosening the entire annular grain sorting zone 3, keeping the tension constant and stabilizing the grain sorting action. For cleaning the pot hole 4 of the present invention, the annular grain sorting zone 3 is used.
Any method such as a brush or wind power may be used as the cleaning device 9 at any location. In addition, in the present invention, the grain size of the sorted particles can be adjusted by adjusting the suspension inclination angle of the annular grain sorting zone.

In short, the present invention streamlines the volume of the entire device, which tends to be large like a cylindrical body, by suspending an annular grain sorting zone with a large number of bottomed holes formed on the surface between pulley wheels. In addition, by distorting the pot hole 5 to prevent clogging of the pot hole 4 and stabilize the sorting action, it is possible to perform grain size sorting without clogging, which was previously considered difficult, and to achieve a consistently highly efficient grain size sorting action. A significant effect is that it has ensured the following.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 2 is a side view, FIG. 2 is a front view, and FIGS. 3 and 4 are enlarged side sectional views of important parts. 1...pulley, 2...pulley, 3...
・・・Annular grain sorting zone, 4...Bottomed pot hole, 5...
・・Bottom wall of the pot hole, 6・・Protruding part, 7・・・・
Transmission adjustment belt 8... Grain feeding hopper 9...
...Cleaning device.

Claims (1)

[Scope of Claims] 1. A large number of potholes with bottoms are inserted into the front surface, the bottom walls of the potholes are made to protrude from the back surface, and the outer surface of the protruding portion of the bottom wall is touched by the contact body. When pressed into the pot hole, the annular grain sorting zone made of a thin plate made of an elastic material such as polyurethane or rubber, whose bottom wall is slightly deformed and protrudes into the pot hole, is pressed against the bottom wall of the pot hole on the back side. A grain size sorting device characterized in that the convex portions of the grains are in contact with each other and tensioned in an inclined manner by a plurality of rotating pulleys so that the grains can enter and exit the pot holes on the surface. 2. The particle size sorting device according to claim 1, characterized in that a power transmission band made of metal, fiber, rubber, etc. with high tensile strength is attached to the back surface of the annular particle selection band. 3. The grain according to claim 1, characterized in that a cleaning device such as a brush is provided in contact with the pot hole portion exposed on the surface of the annular grain sorting zone suspended on the pulley. Large sorting device.