JPH09290216A - Clogging preventive device for oscillation type sieving net - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to prevent the clogging of meshes by spreading a rear surface net in parallel with a front surface net apart a spacing under the front surface net of a sieving device and movably housing plural pieces of clogging dice of a dice type into the gap between the front surface net and the rear surface net. SOLUTION: A rotary sieving machine is constituted by segmenting the inside of a main body case 1 to sieving chambers 5, 6, 7, 8 spread with the nets 2, 3, 4 of the meshes made successively finer from above and delivers the tea sorted by these nets 2 to 4 to take-out ports 9 to 12. An eccentric turning body is fixed to the main body case 1. An eccentric shaft disposed in a machine frame is inserted to this turning body and the main body case 1 is eccentrically turned through the eccentric shaft, by which the leaf tea in the respective sieving chambers 5 to 8 in the main body case 1 is sieved. The rear surface net of the meshes coarser than the meshes of the front surface net 4 is spread in parallel under the front surface net 4 in the sieving chamber 8 spread with the front surface net 4 of the finest meshes to form the gap 19. The clogging preventive dice 20 of the dice type are housed into the gap so as to be made movable vertically and laterally within the gap 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing clogging of an oscillating type sieving net such as a sieving machine or a vibration type sieve.

[0002]

SUMMARY OF THE INVENTION An object of the present invention is to provide an oscillating type sieve which prevents clogging of the mesh.

[0003]

According to the present invention, a plurality of dice-type clogging prevention pieces are movably housed in a space between a front surface net of a sieve and a back net stretched in parallel thereunder. It is a thing.

[0004]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show a sieving machine used for the selection of leaf tea, in which the concept of the present invention is applied to a sieving chamber having a final fine mesh. As shown in FIG. 1, the sieving machine has a mesh 2 in which the inside of the main body case 1 is made finer sequentially from the top to the bottom.
(No. 4), 3 (8-10), and 4 (20-40) are divided into sieving chambers 5, 6, 7, and 8, and each net 2,
The teas selected in 3 and 4 are delivered to the outlets 9, 10, 11 and 12, respectively. In the main body case 1, the eccentric rotator 14 shown in FIG. 2 is fixed, the eccentric shaft 16 provided in the machine frame 15 is inserted into the rotator 14, and the eccentric shaft 16 is moved from the motor 17 via the transmission mechanism 18. Through the body case 1
Eccentrically rotate to separate leaf tea from each sieving chamber in the main body case. In the present embodiment, the back side net 21 having a coarser mesh than the surface net 4 is arranged in parallel with the sieving chamber 8 in which the finest surface net 4 (No. 20-40) is stretched. To form a space 19 between the front surface net 4 and the back surface net 21. Numeral 20 is a sardine-shaped clogging prevention piece formed of nylon as shown in FIG. 3, not limited to nylon,
Molded with other synthetic resin. 3 cm is suitable for one piece. And the space 19 between the front surface net 4 and the back surface net 21
The range in which the clogging prevention piece 20 moves up and down by the swinging motion is about 1 to 2 mm. The clogging prevention piece 20 placed in the gap with the swinging motion of the sieving chamber repeatedly moves up and down, left and right, thus constantly leaping the leaf tea that tries to clog the mesh, causing the clogging to move. prevent.

[0005]

According to the present invention, the clogging of the sieving net can be reliably prevented by the swinging motion of the prevention piece, and the sieving operation can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional front view.

FIG. 2 is a perspective view of a sieving machine provided with the device of the present invention.

FIG. 3 is a perspective view of a clogging prevention piece.

[Explanation of symbols]

 4 Surface net 8 Sieving chamber 19 Void 20 Clogging prevention piece 21 Back net

Claims (1)

[Claims] 1. A back side net is stretched in parallel with the front side net at a required distance below the front side net of the sieve, and a dice roller is used.
A clogging prevention device for an oscillating type sieving net, wherein a plurality of clogging prevention pieces formed in a mold are movably accommodated in a space between the front surface mesh and the back surface mesh.