Apparatus for sorting according to colour

Abstract

To provide a color sorting apparatus capable of sorting an object to be sorted which has comparatively fine and thin size and minute mass and therefore has not been able to be sorted heretofore.This color sorting apparatus for sorting an object with predetermined color from among the objects to be sorted W is equipped with a chute 1 which is installed with a tilt angle [alpha] and which makes theobject W being sliding downward bounce out in a predetermined direction, a cover 2 which is spaced a predetermined interval away from a chute surface and which covers at least a part of the chute surface, an inspection means 3 which is spaced a predetermined interval away from a chute lower end so as to be able to monitor a locus of the object W having bounced out from the chute lower end part andwhich inspects color of the object W, a determining means which is connected with the inspection means and which determines whether the object has a predetermined color based on the color of the object W obtained by the inspection means, and a separation means 4 which is spaced a predetermined interval away from the chute lower end and which blows off the object W that is determined to have the predetermined color by the determining means to allow the object W to fall along a locus different from the falling locus from the chute.

Description

technical field [0001] The present invention relates to a sorting device by color, which is used for sorting objects different in size and shape, such as tea leaves, Ulva and Basil, into good products and defective products. Background technique [0002] It is known that a sorting device by color for removing color-unfavorable defective products from foodstuffs such as rice or tea has a structure in which foodstuffs or objects to be sorted are along a plate (chute) of corrugated cross-section While sliding, it is accepted by the inspection device or color recognition sensor arranged under the slideway. The slideway has a row of V-shaped or U-shaped grooves in cross section, which are arranged along the width direction at an angle to the horizontal direction. . When judged by the sensor as a defective product, the object is blown away by a separating device such as an ejector that emits a jet of compressed air, and falls in a channel different from the channel of the good pr...

AI Technical Summary

Problems solved by technology

Since it is not easy to remove defective products by jetting with air jets, the chute is inclined to a limited angle

[0013] It is clear from the introduction of the prior art that when the object is relatively light, short, thin and of low mass and has a low bounce coefficient, or is Ulva, basil or tea including particle shapes such as small piece size and powder size mill In practice, no sorting device by color has been successfully used to sort with the required precision when tea leaves, including "Tencha" or "deep-steamed tea" in crushed or crushed form

[0014] In addition, a device using a trough-type slideway (such as Japanese Utility Model Publication No.H07-21163 and such as Figures 6 to 8 described in the prior art shown in ) is still not very satisfactory for general purpose, because the cross-sectional shape, the width of each groove and the relationship between grooves and grooves must be selected according to the size and shape of the objects to be sorted. Modify the slideway in terms of spacing between

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