JPH08252535A - Ejector nozzle for multirow type sorter - Google Patents

Abstract

PURPOSE: To provide an ejector nozzle for a multirow type photoelectric sorter free from variations with every row. CONSTITUTION: An ejector nozzle 7 is composed of an upper member 8 and a lower material 9. The one side face of the upper member 8 is provided with plural shallow parallel grooves of the number equal to the number of the rows of downflow passages extending in a direction nearly perpendicular to a longitudinal direction at intervals nearly equal to the pitches of the rows of the downflow passages for materials to be sorted along the longitudinal direction of the ejector nozzle 7 and is provided with circular conical recessed parts behind these grooves. The ejector nozzle is provided with through-holes in the positions corresponding to the circular conical recessed parts of the lower material 9. The upper member 8 and the lower material 8 are so combined that the respective planes are superposed on each other. Plural slit air injection holes are formed by the plural grooves of the upper member 8 and the plane of the lower member 9. Hoses 10 for supplying injection air discretely to the respective air injection holes are inserted into the respective insertion holes of the lower member 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ejector nozzle for a multi-row photoelectric sorter (one having a plurality of descending passages for an object to be sorted) among photoelectric sorters for granular products such as grains and nuts. Regarding

[0002]

2. Description of the Related Art Conventionally, there is a photoelectric sorter as a device for sorting foreign substances mixed in granular products such as grains. FIG. 1 is a schematic configuration diagram of a conventional photoelectric sorter. In FIG. 1, a light source 3 is attached to an object to be sorted which is made to flow from the chute 1 to the photoelectric sorting unit 2.
From the object, the light reflected or transmitted by the object to be sorted is received by the sensor 4, and the ejector 5 is actuated based on the electric signal generated by the sensor 4 according to the received light to blow off the foreign matter. It is configured to be excluded. The light source 3 and the sensor 4 are arranged in the photoelectric chamber 6.

In order to increase the efficiency of sorting, there is a so-called multi-row type photoelectric sorting machine in which a plurality of flow-down passages of the sorted objects are arranged in the lateral direction and the above photoelectric sorting machines are arranged in one row. . In such a conventional multi-row photoelectric sorter, a light source, a sensor, an ejector, and the like are attached to each row. The light source, the sensor, and the ejector are attached according to a predetermined standard so that the position and the sensitivity do not vary from column to column, but there is no such variation. Therefore, at present, a timing circuit for adjusting the operation timing of the ejector is provided for each column in order to finally adjust the variation for each column.

[0004]

However, such work is complicated and expensive, and the ejector may be out of position during maintenance or the like, and readjustment may be necessary. Therefore, it is an important problem in a multi-row type photoelectric sorter to reduce the number of elements that cause such variations in each row as much as possible.

In view of such a point, the present invention has been made to reduce the problems of the conventional multi-row type photoelectric sorter as much as possible, and in particular, an ejector nozzle and an ejector having no variation in each row are provided. It is intended to be provided.

[0006]

In order to achieve the above object, in the present invention, an ejector nozzle for a multi-row photoelectric sorter is formed by an elongated nozzle body, and the ejector nozzle is arranged along the longitudinal direction of the nozzle body. A plurality of airs in the chute of the multi-row photoelectric sorter, which extend in a direction substantially perpendicular to the longitudinal direction at intervals equal to the pitch of the rows of the flow passages for the objects to be sorted, and in the same number as the rows of the flow passages An injection hole is provided, and a hole for a hose that communicates with the air injection hole and supplies the injection air to the air injection hole is provided for each of the air injection holes.

The size of the air injection hole is determined by the size of the object to be sorted and the like, but is generally a narrow hole. Further, it is preferable that the boundary portion between the air injection hole and the hose hole is gradually expanded to smoothly guide the injection air to the air injection hole.

The air injection hole does not have to have a circular cross section, and may have any cross sectional shape such as a slit shape or an elliptical cross section.

The nozzle body does not necessarily have to be an integral part, but may be a combination of two parts. Further, it may be formed by injection molding or the like, or may be formed by cutting a metal material such as aluminum. Further, in order to attach the nozzle body to the frame of the sorter or the like, it is preferable to provide the nozzle body with attachment means such as predetermined attachment holes.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIG. 2 is a schematic configuration diagram of a multi-row photoelectric sorter incorporating the ejector nozzle of the present invention, and FIG. 3 is a detailed diagram of the ejector nozzle of the present invention. The ejector nozzle 7 of the present invention is arranged as shown in FIG. That is, the photoelectric chambers 6 are arranged in each row below the chute 1 having a plurality of rows, and the ejector nozzles 7 of the present invention are arranged below the photoelectric chambers 6.
Is arranged. The entire ejector nozzle 7 is attached to a frame or the like of the photoelectric sorter at a predetermined position.

In FIG. 3, the ejector nozzle 7 is composed of an upper member 8 and a lower member 9. Upper member 8
Are provided with grooves having a predetermined width and depth at a pitch equal to the pitch of the rows of the multi-row photoelectric sorter and parallel to each other in the direction perpendicular to the longitudinal direction of the ejector nozzles 7.
In this embodiment, ten grooves are provided. Further, a mortar-shaped deeper recess is provided behind the groove. On the other hand, the lower member 9 is formed of a rectangular parallelepiped having a generally flat surface, and a through hole is provided at a position corresponding to the mortar-shaped recess in the upper member 8. The upper member 8 and the lower member 9 are superposed and firmly fixed as shown in FIG. When superposed, the plurality of grooves of the upper member 8 and the plane of the lower member 9 form a plurality of slit-shaped holes having a predetermined pitch. This slit hole forms an air injection hole of the ejector nozzle 7. A hose 10 is fitted into each of the plurality of through holes of the lower member 9.
The hose 10 is connected to each jet air supply source, and jet air is supplied to each jet port via the hose 10. By providing the mortar-shaped recess, the blast air supplied from the hose 10 is smoothly guided to the air blast holes. In the present embodiment, the upper member 8 and the lower member 9 are made by cutting and polishing an aluminum block, but they can also be formed by injection molding of plastic or the like.
Furthermore, the two parts may be integrated and injection molded.

Referring again to FIG. 2, the ejector nozzles shown in FIG. 3 are mounted along a plurality of rows of chutes 1. With such a configuration, when a sensor provided in the photoelectric chamber 6 for each row detects a foreign matter, the ejected air is supplied to the air ejection holes of the ejector nozzles corresponding to the row where the foreign matter is detected, and the foreign matter is splashed. It can be skipped and eliminated.

[0013]

In the ejector nozzle of the present invention, since a plurality of air injection holes are integrated, if the position of the ejector nozzle is set first, there is no need to adjust it thereafter and the efficiency is extremely high. Further, it is highly effective in that it is space efficient and can be manufactured at low cost as compared with a conventional device in which an ejector is provided for each row.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a conventional photoelectric sorter.

FIG. 2 is a schematic configuration diagram of a multi-row type photoelectric sorter incorporating the ejector nozzle of the present invention.

FIG. 3 is a detailed view of the ejector nozzle of the present invention.

[Explanation of symbols]

1 shoot, 2 photoelectric selection section, 3 light source,
4 sensors, 5 ejectors, 6 photoelectric chambers,
7 ejector nozzle, 8 upper member, 9 lower member, 10 hose

Claims (4)

[Claims] 1. An ejector nozzle for a multi-row photoelectric sorter, which comprises an elongated nozzle body, and flows down the objects to be sorted in a chute of the multi-row photoelectric sorter along the longitudinal direction of the nozzle body. A plurality of air injection holes extending in a direction substantially perpendicular to the longitudinal direction at intervals equal to the pitch of the passage rows are provided in the same number as that of the flow passage rows, and the air injection holes are provided for each of the air injection holes. An ejector nozzle, characterized in that it is provided with a hole for a hose that communicates with the air injection hole and supplies the injection air to the air injection hole. 2. The ejector nozzle according to claim 1, wherein a boundary portion between the air injection hole and the hose hole gradually widens. 3. The ejector nozzle according to claim 1, wherein the nozzle body is formed by combining two parts. 4. An ejector for a multi-row photoelectric sorter, comprising an elongated nozzle body, and a passage through which an object to be sorted flows in a chute of the multi-row photoelectric sorter along the longitudinal direction of the nozzle body. A plurality of air injection holes extending in a direction substantially perpendicular to the longitudinal direction at an interval equal to the pitch of the rows of the air passages, and the air injection holes are provided for each of the air injection holes. An ejector nozzle provided with a hose hole communicating with the air injection hole for supplying the air to the air injection hole is provided, and the air supplied from each air supply source is supplied to each of the hose holes. An ejector characterized by having a hose for insertion inserted therein.