JPS63224780A - Selector for granular material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a granular material sorting device for removing pebbles, sand, etc. from granular material 1, for example coffee beans.

[Conventional technology and its problems]

The present applicant previously filed a patent application for this type of device in 1986-35.
He proposed a device disclosed in No. 804. In this device, one granular material is introduced into a cylindrical container, the material is brought into a fluid state within the cylindrical container, and most of the granular material is removed by overflowing from a predetermined height. ``One step of sorting; and the lower part of the material in the fluid state is introduced to an inclined diaphragm, and one granular material and pebbles of the same particle size are sorted on the diaphragm based on the difference in specific gravity. and one other step, but separate machines are used to perform both steps. Therefore, the installation area of one machine becomes larger and the cost becomes higher.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a granular material sorting device that reduces the installation area of the machine and reduces costs.

[Means for solving problems]

The above purpose is to introduce the granular material to be sorted into a cylindrical container that performs screw vibration, bring it into a fluid state within the container, and overflow from a predetermined height to the outside of the container. The lower part of the granular material in a fluid state is guided into a rising track wrapped around the cylindrical container, and the material is moved upward while being in a fluid state on the track. While being vibrated and transferred to the granular material to be sorted, the foreign matter is located in the lower layer due to its specific gravity being larger than that of the granular material to be sorted, and is preferentially transferred through the track by vibration, and is discharged to the outside from the discharge end of the track, This is achieved by a granular material sorting device characterized in that the granular material in the upper layer is reintroduced into the cylindrical container during transportation by the truck and subjected to secondary sorting.

[For production]

A sorted granular material is obtained in the overflow from a predetermined height of the cylindrical container. The lower portion of the granular material in a fluid state within the cylindrical container is guided to a rising track, and while rising on this track, foreign matter is separated due to the difference in specific gravity and removed from the end of the track to the outside. On the way up the truck, the granular material reintroduced into the cylindrical container undergoes secondary sorting, and the degree of sorting is further improved.

Since the process of separating foreign substances is also performed by one machine, the installation area of the machine can be significantly reduced compared to the conventional method, and the cost can also be significantly reduced. Moreover, the sorting accuracy can also be improved.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A sorting device according to an embodiment of the present invention will be described below with reference to the drawings.

In the figure, one sorting device is indicated as (1) as a whole.

Coffee beans are supplied from the outside as granular material into the cylindrical container (2) via a supply duct (3). The supply duct (3) passes through the lid plate (4), and a supply amount adjusting member (6) is attached to the lower end of the pipe section (5) in the container (2) so as to be movable up and down. This bottom opening and the container (
2) and the fluidized bed (7) fixed at the bottom thereof can be adjusted.

The fluidized bed (7) has a low conical shape in which a number of air holes (8) are formed. In addition, a third
As shown in the figure, a low spiral partition wall (9)
is attached, which creates a p-spiral track α
q is formed. This end communicates with the discharge opening αυ formed on the lay of the fluidized bed (7) at the bottom of the container (2), and the material containing foreign matter discharged from the cylindrical container (
2) is supplied to the track 4 wrapped around the outer circumference of the pipe.

In addition, a blower duct (to) is fixed to the bottom of the container (2), and the air flow from the blower (b) passes through the container (2).
The fluidized bed (7) is guided downwards. The air flow is a fluidized bed (7
) is made into a fluid state and is exhausted to the outside through the space (g) in the container (2) and the exhaust port αη.

The exhaust port afjαη is subjected to a suction action by an aspirator (to) a■.

The side wall of the container (2) is further formed with an opening located at a predetermined height, and the material discharged from the container (2) is collected through a chute fixed to the side wall of the container (2). It is designed to lead you to the department. The introduction opening (2xa) of (211) is connected to the opening.

A drive unit mounting plate C21 is fixed to the bottom of the container (2).

A pair of vibrating electric motors (231 (2)) are attached to this.As is well known, these electric motors (231 (241) are attached tilted in opposite directions to each other, and when they are driven, A vibration force is generated around the axis of the container (2).The container (2) is supported by a vibration isolation spring (261) on a column (251).

The track (6) wrapped around the cylindrical container (2) performs screw vibration integrally with the cylindrical container (2).
As shown in Figure 1, it has an upward slope, and extends over approximately 180° as shown in Figure 2, and the secondary sorting track summer is connected to it with a step at its discharge end (i2a). It is set up. Secondary sorting truck ■ is a cylindrical container (2)
The outer periphery of
The cylindrical container (2
) is fixed. That is, the screw vibration is performed integrally with the cylindrical container (2). The return track (321 also extends over a quarter range, and is concentric with the secondary sorting track on the outer periphery), and although there is a step on most of the downstream side, both tracks (30+321 are in communication with each other at the upstream end.

A partition wall is formed between these.

The secondary sorting track (30) has an upward slope and the transfer surface consists of punched metal (40) with a number of small holes 311. This punch metal (401) is inclined upward in the direction of material transfer, and there is also a fifth
As clearly shown in the figure and FIG. 6, it is inclined downwardly toward the radially inward side of the cylindrical container (2). Three discharge openings are formed at the end of the secondary sorting track 00).

From here, foreign objects such as pebbles and sand are discharged to the outside. In addition, the transfer surface of the return truck 321 (3
2m) also has an upward slope and is inclined downward toward the radially inward side of the cylindrical container (2), but it is not punched metal but a blind plate.

Truck (301t32 below is shown in Figure 1, Figure 4, Figure 5)
As shown in the figure, the closed space (36) (three forces
Air flow from the blower αΦ is introduced into this via the duct c3■. This airflow is released into the atmosphere through the small hole 3υ of the punched metal + 4G of the secondary sorting truck, and the material on the punched metal (401) is fluidized by this airflow. It has become.

The terminal end (32b) of the return truck C32) is a cylindrical container (
The material is passed through the return opening formed in the peripheral wall of the cylindrical container (2), and the material is passed through the inner wall of the cylindrical container (2), which is wrapped around the inner peripheral wall of the container (2). The material is guided to the inner track (431) in FIG.
) onto the material which is in a fluid state in the cylindrical container (2). (421 is a partition wall. In addition, the discharge end (43a
) is located on the downstream side of the above-mentioned opening - in plan view.

The embodiment of the present invention is configured as described above.

Next, this effect will be explained. Note that coffee beans containing pebbles and sand (which have a smaller specific gravity than pebbles and sand) are used as the material to be sorted.

In FIG. 1, coffee bean material is fed into the container (2) via the feed duct (3). The material is brought into a fluidized state by the air flow blowing up from below the fluidized bed (7) and subjected to screw vibration forces. Adjustment of the adjustment member (6) determines the layer thickness of the material placed in the fluid state (note that material M is only shown sporadically for clarity of illustration), i.e. the container (2). The layer thickness of the material M supplied therein is limited.

The upper part of the material M in the fluid state is occupied by coffee beans with a relatively low specific gravity, which are led in an overflow state through the opening head and shoe (211) to the coffee bean collecting section. The lower layer consists of coffee beans and pebbles, which are located at the opening σ at the bottom of the container (2).
It is guided through υ to the outer track (6). Shinji
As the material is discharged from the container ρυ, the material M is sequentially supplied from the supply duct (3), and the layer thickness of the material M in the container (2) is always maintained constant.

In addition, the material is discharged smoothly from the chute and the opening σ due to the transfer force caused by the vibration of the screw.

In addition, the vibration of the screw promotes fluidization of the material.

Materials consisting of coffee beans, pebbles, sand, etc. are dumped from the opening a on the same level as the fluidized bed (7) onto the truck (2).
Supplied sequentially. These are transferred to a secondary sorting track, where they are fluidized by the air blowing up from below and are transferred upwards along the track (30) by the vibratory force.

In order to fluidize the material, pebbles with a high specific gravity are in the lower layer M', and coffee beans M with a lower specific gravity are in the upper layer. Therefore,
The pebbles M' preferentially receive the vibration force of the punch metal (40) and receive the upward transport force. In addition.

Since the punch metal (40) is inclined toward the cylindrical container (2) in the direction of material transfer, both the 711 stone and the coffee beans slide upwards toward the cylindrical container (2) due to gravity. However, since the pebbles are in direct contact with the punch metal (40J), the upward transport force is greater and the movement to the return track 6z is almost prevented.

Moreover, since the coffee beans M occupy the upper layer, the coffee beans M receive the transfer force due to the gravitational action due to the inclination rather than the transfer force due to the vibration force, and slide on the pebbles M' in the lower layer and advance toward the return track i32. (See Figure 6) As described above, most of M' such as pebbles and sand are sorted on the top of the secondary sorting truck and discharged to the outside from the discharge port 341, while other materials are sent to the return truck (321). However, pebbles and sand, which have a specific gravity close to that of coffee beans, are still included in this.
The inner track (
431 and is transported counterclockwise in FIG. 2 by the vibration, and falls from this discharge end (43a) onto the material in a flowing state. , is again subjected to the sorting action. Although the difference is small, pebbles and sand with large specific gravity migrate to the lower layer. Materials in the a-puffed state in the upper layer are in the aperture (4
) and is discharged from the sheet (2υ) to the coffee bean storage section.The material in the upper layer is also transferred counterclockwise in Fig. 2 due to the vibration of the screw υ, and is discharged from the opening (4) to the chute (211). However, the material from the return truck ■ is immediately transferred to the chute Ci!I as the upper layer.
The liquid is returned to the container (2) through the inner track (431) so as not to be discharged into the liquid I. Therefore, the liquid is kept in a sufficiently fluid state and can be subjected to the sorting action.

Although five embodiments of the present invention have been described above, the present invention is of course not limited to these examples, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, a pair of vibration electric motors (24+) were used as the screw vibration drive unit, but a known electromagnetic drive unit may be used instead.

In this case, a plurality of inclined plate springs are used as is known in the art for anti-vibration rubber (261).

Further, in the above embodiment, the supply duct l-(3)'& was used to supply coffee beans into the cylindrical container (2), but instead of this, the lid (4) was omitted and a vibrating feeder, etc. To,
Alternatively, the coffee beans may be placed directly into the cylindrical container (2).

In addition, in one or more embodiments, the punch metal (4) (j is inclined upward toward the transfer direction and downward toward the cylindrical container (2) side is used as the transfer surface of the secondary sorting track. However, the coffee beans in the upper layer may flow out to the return track 321 side in an overflow state. Therefore, this allows the cylindrical container (
2) Be guided inward.

Alternatively, the return truck 62 may be omitted and the secondary sorting truck summer may be directly converted into the cylindrical container (2).

〔Effect of the invention〕

As described above, according to the granular material sorting device of the present invention, the installation area of one machine can be further reduced compared to the conventional method, and it is possible to produce ink that further improves the accuracy of granular material sorting.

[Brief Description of the Drawings] Fig. 1 is a partially broken side view of a granular material sorting device according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a partially broken side view. The same perspective view, FIG. 4 is a sectional view along the line IV-TV in FIG. 2, FIG. 5 is a sectional view along the line v--v in FIG. 2, and FIG. 6 is a developed view of the main parts. In the figure,

Claims (4)

[Claims] (1) The granular material to be sorted is introduced into a cylindrical container that undergoes torsional vibration, brought into a fluid state within the container, and overflowed from a predetermined height to the outside of the container. The lower part of the granular material in a fluid state is guided into a rising track wrapped around the cylindrical container, and the material is vibrated upward while being in a fluid state on the track. While being transported by
Because the foreign matter has a higher specific gravity than the granular material to be sorted, it is located in the lower layer and is preferentially transported through the truck by vibration and discharged from the discharge end of the truck, while the granular material in the upper layer is transported through the truck. A sorting device for granular materials, characterized in that the granular materials are reintroduced into the cylindrical container during transportation and undergo secondary sorting. (2) The sorting device according to item 1, wherein the fluid state within the cylindrical container is obtained by blowing out air from below a punch metal installed at the bottom of the cylindrical container. (3) The sorting device according to item 1, wherein the fluid state on the ascending track is obtained by blowing out air from below a punch metal installed at the bottom of the track. (4) The sorting device according to item 1, wherein the ascending track is slanted downward radially inward of the cylindrical container.