JPH0373351B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a granular material sorting device for removing various foreign substances from coffee beans as a raw material.

[Conventional technology and its problems]

FIG. 9 shows a conventional example of this type of device, in which a trough 1 is covered with a hood 3 to form a sealed structure, and a rectifying plate 2 made of punched metal is installed inside. An air flow is sent from below the baffle plate 2 through a blower pipe 4, and the material on the baffle plate 2 is brought into a fluid state and exhausted to the outside through a duct 5.

A drive unit mounting plate 9 is fixed to the bottom of the trough 1, and is connected to a base block 10 by a leaf spring 11. Further, the distal end of the drive rod 13 of the crank drive section 12 is attached to the mounting plate 9. A crank drive unit 1 is driven by a motor (not shown).
2 is driven, and the trough 1 vibrates in the direction shown by arrow a.

The coffee bean material containing various foreign substances introduced from the supply port 6 is transferred to the right on the upwardly inclined current plate 2 by the vibration of the trough 1. During this transfer process, the material is brought into a fluid state by airflow from below, and components with high specific gravity such as pebbles S occupy the lower layer, while components with lower specific gravity such as coffee beans occupy the upper layer. It becomes like this. Therefore, the pebbles S directly receive the vibration force from the current plate 2 and obtain a force to move them to the right, but the coffee beans, etc., which have a lower specific gravity in the upper layer, slide on the lower layer due to the action of gravity. It will start moving to the right.

That is, so-called specific gravity sorting is carried out as described above, and pebbles S are discharged from the right discharge port 7, and not only coffee beans M, but also cotton, dust, small sand, wood chips, etc. are discharged from the left discharge port 8. String (asahimo) is also discharged. The string was mixed in from the cloth bag that contained the coffee bean ingredients.

[Problem that the invention seeks to solve]

The present invention was made in view of the above problems, and an object of the present invention is to provide an apparatus capable of sorting highly pure coffee bean materials.

[Means for solving problems]

The above purpose is to suspend a first vibrating screen in a trough for removing foreign matter such as sand with a particle size smaller than the coffee bean material as a sieve, and to face the discharge end of the first vibrating screen. A vibrating sieve equipped with a suction duct equipped with a suction port, a suction device connected to the suction duct, and a foreign material having a size larger than the particle size of the coffee bean material, such as wood chips or string, placed on the sieve. A vibrating sieve conveyor with a second vibrating screen suspended in the trough for removal, a conical fluidized bed as a bottom wall, and a first vibrating screen on a side wall at approximately the same height as the fluidized bed. A cylindrical container having an outlet and a second outlet formed in a side wall portion at a predetermined height from the fluidized bed to perform torsional vibration around the axis of the cylindrical container; a vibrating fluidized sorter equipped with a supply duct that extends to a predetermined depth from above toward the fluidized bed; and at least one step extending in the direction of transport by vibration is formed; has a material conveying surface as a fluidized bed inclined at a direction, and in the transfer direction of the material conveying surface, a first discharge port is provided at the discharge end side, and a second discharge port is provided at the lower edge of the one side. the vibrating sieve, the vibrating sieve conveyor, the vibrating flow sorter, and the vibrating specific gravity sorting machine are sequentially arranged along the flow of the coffee bean material;
transporting the coffee bean material supplied to the vibrating sieve over the first vibrating screen by vibration;
During this process, foreign matter such as sand with a smaller particle size than the coffee bean material is removed as a sieve, and foreign matter such as cotton, dust, and small sand is sucked out by the suction device near the discharge end of the first vibrating screen. The coffee bean material, such as wood chips, string, etc., is sucked in through the mouth and discharged to the outside through the suction duct, and then fed on the sieve of the first vibrating screen onto the second vibrating screen in the vibrating sieve conveyor. Foreign matter having a particle size larger than the particle size is removed as a sieve of the second vibrating screen, and
The lower part of the vibrating screen is fed into the vibrating fluidized separator through the supply duct to the fluidized bed, and the fluidized bed is brought into a fluidized state for specific gravity separation, and the upper layer of coffee bean material is passed through the second waste material. The coffee bean material in the lower layer is discharged from the outlet to the outside, and the coffee bean material in the lower layer mixed with foreign matter such as pebbles having a particle size similar to that of the coffee bean material is discharged from the first discharge port and is removed from the material of the vibration specific gravity sorter. Foreign matter that is supplied to the conveying surface and has a higher specific gravity than the coffee bean material is located in the lower layer on the high specific gravity side, is caught on the step, is transported along it by vibration, and is discharged from the first discharge port to the outside. A sorting device for coffee bean material, characterized in that the coffee bean material in the upper layer side is rolled above the lower layer by vibration and gravity and is discharged to the outside from the second discharge port; achieved by.

[Effect]

A suction device connected to the vibrating sieve removes light and small foreign matter such as cotton, dust, and small sand. Also, foreign matter with small particle size is
removed by a vibrating screen. The vibrating sieve conveyor removes relatively large stones, pieces of wood, string, etc. The material that has gone through the above steps is brought into a fluidized state in a cylindrical container using a vibrating flow sorter, and the granular material with relatively low specific gravity occupies the upper layer, which overflows. The lower layer is subjected to specific gravity separation using an inclined vibration plate using a vibration specific gravity sorting machine, and is separated into granular materials and pebbles. The granular material is obtained from a vibratory fluid separator and a vibratory gravity separator, and is of high purity and yield.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, a coffee bean material sorting apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8.

FIG. 8 illustrates the entire process, and this embodiment consists of a vibrating sieve 120, a vibrating sieve conveyor 130, a vibrating flow sorter 140, and a vibrating specific gravity sorter 150 in order from the upstream side.

First, details of the vibrating sieve 120 as the first step will be explained with reference to FIG.

A first vibrating screen 22 is stretched inside the trough 21, and a lid plate 23 provides a sealed structure. Further, a supply port 21a is formed at the left end of the trough 21, and coffee bean material containing various foreign substances is inputted from the hopper 31. The diameter of the large number of openings in the first vibrating screen 22 is, for example, 4 mm, which is sufficiently smaller than the particle diameter of coffee beans.

A ball receiver 24 is fixed to the lower part of the first vibrating screen 22 and accommodates a large number of rubber balls 26. These balls 26 are divided by a partition wall 25 into approximately the same number of balls. A number of openings are also formed in the lower plate of the ball receiver 24, and these openings are sufficiently larger than the openings in the first vibrating screen 22 above. Materials smaller than the openings of the first vibrating screen 22 fall into the space 30 below the ball receiver 24, and materials larger than the openings of the first vibrating screen 22 (mainly coffee beans)
is directly transferred to the right on the first vibrating screen 22.

A suction duct 27 is attached to the right end portion of the lid plate 23 via a guide portion 28, and the air inside the trough 21 is sucked in by a suction fan 29 as a suction device. Suction duct 27
can be adjusted to move up and down, and its suction port 27a faces the right end of the first vibrating screen 22. Light materials such as cotton and dust transferred on the first vibrating screen 22 are removed from the suction port 22.
7a and is discharged to the outside through a suction duct 27. Materials, mainly coffee beans, that are not sucked in by the suction port 27a are supplied to the next process from the first discharge port 21b. The material under the sieve that has been sieved by the punch metal 22 serving as the first vibrating screen is transferred to the second discharge port 21.
It is discharged to the outside through c.

A drive unit mounting plate 36 is fixed to the bottom of the trough 21, and is connected to a base block 33 by a leaf spring 32. Further, the tip of a drive rod 35 of the crank drive section 34 is pivotally mounted to a mounting plate 36. The crank drive unit 34 is driven by a motor (not shown), and the trough 21 vibrates in the direction shown by arrow a.

Next, referring to FIG. 2, the vibrating sieve conveyor 13
The details of 0 will be explained.

The trough 40 has a sealed structure, and includes a punched metal 41 as a second vibration screen and a rectifying plate 42.
are stretched vertically, and there are three spaces 44, 45,
46. The air flow sent by the blower 52 is guided into the space 44 through the blow pipe 43,
From here, the air is exhausted to the outside through the spaces 45, 46 and the exhaust duct 48. Exhaust duct 48
A suction device 51 is connected to.

A material supply port 47 is formed at the left end of the trough 40, into which material from the above-described discharge port 21b of the vibrating sieve 120 on the upstream side is fed through the supply doctor 53.

Punch metal 4 as a second vibrating screen
The aperture ratio of No. 1 is relatively large, for example, 30%, and the aperture size is also quite large, for example, 12 mmφ, which is sufficiently larger than the particle size of coffee beans. Further, the current plate 42 is formed with a large number of openings, and the size thereof is, for example, 2.2 mmφ, which is sufficiently smaller than the grain size of coffee beans.
Punch metal 41 as a second vibrating screen
The upper material is discharged to the outside through the first discharge port 50, and the material mainly consisting of coffee beans on the baffle plate 42 is supplied to the next process through the second discharge port 49.

A drive unit mounting plate is fixed to the bottom of the trough 40, and is connected to a base block 55 by a leaf spring 54. Further, the tip of the drive rod 57 of the crank drive section 56 is pivotally mounted to the mounting plate. The crank drive unit 5 is driven by a motor (not shown).
6 is driven, and the trough 40 vibrates in the direction shown by arrow b.

Next, details of the vibrating flow sorter 140 will be explained with reference to FIGS. 3 and 4.

The material from the second discharge port 49 of the above-mentioned vibrating sieve conveyor 130 on the upstream side is supplied into the cylindrical container 61 of the vibratory flow sorter 140 via the supply duct 60. The supply duct 60 passes through a lid plate 62, and a supply amount adjusting member 72 is attached to the lower end of a pipe portion 71 in the container 61 so as to be movable up and down, and is fixed to the lower end opening and the lower part of the container 61. The distance between the fluidized bed 66 and the fluidized bed 66 can be adjusted.

The fluidized bed 66 has a conical shape, and has a number of air holes 82 formed therein. Further, as clearly shown in FIG. 4, a low spiral partition wall 81 is attached above the fluidized bed 66, thereby forming a spiral track. This end is the container 6
It communicates with a discharge opening 73a as a first discharge port formed at the lower part of the material 1, and the material discharged from this is supplied to the next process via the discharge duct 73.

Further, a blower duct 65 is fixed to the bottom of the container 61, and the airflow from the blower 64 is guided below the fluidized bed 66 inside the container 61 through this. The air flow causes the material on the fluidized bed 66 to become fluidized and the container 61
The air is exhausted to the outside through the inner space 63 and exhaust ports 67 and 68. The exhaust ports 67, 68 are suction devices 69,
70 receives a suction action.

A plurality of openings 61a and 61b are formed at a predetermined height on the side wall of the container 61, and the material discharged from the openings is passed through a trough wound around the side wall of the container 61. 74 and a chute 75 connected to this end to lead to a coffee bean collecting section.

A drive unit mounting plate 78 is fixed to the bottom of the container 61, and a pair of vibration motors 79, 80 are attached to this. As is well known, these electric motors 79 and 80 are mounted so as to be inclined in opposite directions, and when they are driven, they generate torsional vibration force around the axis of the container 61. Also container 61
is supported on a support 76 by a vibration isolation spring 77.

Next, details of the vibration specific gravity sorter 150 will be explained with reference to FIGS. 5 to 7.

This vibration specific gravity sorter 150 performs the same function as the conventional example shown in FIG. 9 in principle, and performs sorting based on the difference in specific gravity of materials.

A cover plate 96 is fixed to the substantially rectangular trough 90 to form a closed structure. A punched metal 93 is stretched in the trough 90 so as to be inclined to one side in the transport direction A due to vibration of the material (FIG. 5).
A large number of air holes 92 are formed in the punched metal 93, but these are much smaller in size than the particle size of the material supplied thereon.

Three steps e, f, and g extending in the transfer direction due to movement are formed on the material transfer surface made of such punched metal 93, respectively.

A supply port 91 is formed in one side wall of the trough 90, and the supply port 91 is connected to the above-mentioned vibrating flow sorter 14 on the upstream side.
Material from the discharge guide 73 of 0 is guided. Further, a second outlet 99 is formed in the other side wall, and a first outlet 101 is formed in the front wall. An air flow sent by a blower 94 is introduced below the punched metal 93 via a blowing pipe 95, and the material on the punched metal 93 is brought into a fluid state to be transferred to the hood duct section 9.
7 is exhausted to the outside. The hood duct portion 97 is suctioned by a suction device 98 .

A drive unit mounting plate 100 is fixed to the bottom of the trough 90, and this plate is attached to a base block 103 and a leaf spring 1.
02. Also, the tip of the drive rod 105 of the crank drive unit 104 is attached to the mounting plate 10.
It is pivoted to 0. The crank drive unit 104 is driven by a motor (not shown), and the trough 9
0 vibrates in the direction shown by arrow C.

Although the embodiment of the present invention is configured as described above,
Next, this effect will be explained.

In FIG. 1, in the vibrating sieve 120, the coffee bean material containing various foreign substances discharged from the hopper 31 is removed by a punch metal 2 serving as a first vibrating screen.
2 and is moved to the right by vibration. Punch metal 22 as the first vibrating screen in this process
Sand and debris smaller than the opening fall into the space 30 below. The rubber balls 26 impinge on the punched metal 22 as the first vibrating screen, thereby improving the sieving effect. It is transferred to the right over the punched metal 22 serving as the first vibrating screen, and when it reaches the right end, it receives a suction action from the suction port 27a, and light components such as cotton and dust are sucked into the suction duct. 27 to the outside. As a result, material mainly consisting of coffee beans having a particle size larger than the opening size of the punch metal 22 serving as the first vibrating screen is discharged from the first discharge port 21b. Furthermore, sand, dirt, and the like having a particle size smaller than the opening size of the punched metal 22 serving as the first vibrating screen are discharged from the second discharge port 21c.

In Fig. 2, the next process vibrating sieve conveyor 1
At 30, the material supplied from the supply duct 53 is transferred by vibration to the right over the second vibrating screen 41, and the material is mainly composed of coffee beans smaller than the opening size of the second vibrating screen 41. The material falls into the space 45 below, and the current plate 42
It is moved above to the right. A large material such as a piece of wood or a string is transferred onto the second vibrating screen 41, but since air is blown from below, it is difficult to fit through the openings of the second vibrating screen 41. It prevents heating,
It moves smoothly to the right. As a result, _M1 such as large pieces of wood and string are discharged from the first discharge port 50, and material _M2 whose main component is coffee beans is discharged from the second discharge port 49.

In FIG. 3, the above-mentioned material M ₂ is fed into a container 61 via a feed duct 60 . fluidized bed 6
The material M ₂ is
is brought into a fluid state and subjected to torsional vibration forces.
The adjustment of the adjustment member 72 determines the layer thickness of the material M ₂ placed in the fluid state. That is, the container 61
The layer thickness of the material M ₂ supplied within is limited.

The upper part of the material M ₂ in a fluid state is occupied by coffee beans with a relatively low specific gravity, which in an overflow state flows through the opening 6 as a second outlet.
1a and 61b, the coffee beans are led through a trough 74 and a chute 75 to a coffee bean collecting section. The lower layer consists of coffee beans and pebbles, and these are led from a discharge opening 73a serving as a first discharge port at the bottom of the container 61 through a discharge duct 73 to a vibration specific gravity sorter 150 for the next step. . As the material is discharged from the trough 74 and the discharge duct 73, the material _M2 is sequentially supplied from the supply duct 60, and the layer thickness of the material _M2 in the container 61 is always maintained substantially constant. Further, material discharge from the trough 74 and the discharge duct 73 is carried out smoothly due to the transfer force caused by torsional vibration. This torsional vibration also promotes fluidization of the material.

In the vibration specific gravity sorter 150 shown in FIGS.
It is sequentially supplied onto the punched metal 93 through the punched metal 93.
These are fluidized by the air blowing up from below and are transported to the right by the vibrational force in FIGS. 6 and 7.

Due to the fluidization of the material, pebbles with a high specific gravity become the bottom layer, and coffee beans with a low specific gravity become the top layer. Therefore, the pebbles preferentially receive the vibration force of the punch metal 93 and receive the rightward transport force. Note that since the punch metal 93 is inclined to one side in the direction of material transfer, both the pebbles and the coffee beans slide downward and move to the right due to the action of the power, but the pebbles are tilted towards the punch metal 93. As shown in FIG. 5, it is formed in a step-like manner to prevent downward movement as much as possible. Moreover, since the coffee beans occupy the upper layer, they slide on the pebbles in the lower layer and advance downward due to the transport force caused by the vibration force, but rather by the transport force due to the gravitational effect due to the inclination.

Eventually, the coffee beans M are discharged from the second discharge port 99, and the pebbles S are discharged from the first discharge port 101. In this vibratory specific gravity sorter 150, most of the coffee beans have already been sorted and collected by the upstream vibratory flow sorter 140, so the load can be reduced and coffee beans can be sorted more accurately and quickly than before. It can be performed.

Although the embodiments of the present invention have been described above, it goes without saying that the present invention is not limited thereto, and various modifications can be made based on the technical idea of the present invention.

For example, the vibrating sieve 120 of the above embodiment, the vibrating sieve is conveyor 130, the vibrating specific gravity sorter 150
Although a crank-driven vibration source is used in the above, the present invention is not limited to this, and other vibration sources such as an electromagnet or a vibrating motor may be used. Vibratory flow sorter 1
The same applies to the 40 excitation sources.

Further, in the vibrating screen (FIG. 1) described above, suction is performed at the right end of the punched metal 22 serving as the first vibrating screen, but it may be performed over the entire area.

In addition, in the vibrating sieve conveyor (Fig. 2), air was blown from below to prevent the wood chips and strings from hitting the openings of the punched metal 41 serving as the second vibrating screen, but in some cases the air Spraying may be omitted.

In addition, in the vibration specific gravity sorter (Figs. 5 to 7), the punch metal 93 is arranged so as to be inclined to one side toward the direction of transport due to vibration, but unlike the conventional example (Fig. It may also be tilted upward. Alternatively, a conventional example may be used as the fourth step.

[Effects of the Invention] As described above, according to the coffee bean material sorting device of the present invention, various other foreign substances can be almost completely removed, and the desired coffee bean material with extremely high purity can be obtained at a high yield. You can get a good deal.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of a vibrating sieve in a coffee bean material sorting device according to an embodiment of the present invention, FIG. 2 is a partially cutaway side view of a vibrating sieve conveyor in the same sorting device, and FIG. 3 is a partially cutaway side view of a vibrating sieve conveyor in the same sorting device. Fig. 4 is a partially cutaway side view of the vibratory flow sorter, Fig. 4 is a partially cutaway perspective view of the main parts of the sorter, Fig. 5 is a partially cutaway rear view of the vibratory gravity sorter in the same sorting device, and Fig. 6 is the same sorter. FIG. 7 is a partially cutaway side view of the machine, FIG. 7 is a partially cutaway plan view, FIG. 8 is a side view showing the entire sorting device of this embodiment, and FIG. 9 is a partially cutaway side view of a conventional coffee bean material sorting device. FIG. In the figure, 22...first vibrating screen, 29...suction fan (suction device), 41...
Punch metal, 61... Container, 61a, 61b...
...Opening (second outlet), 66...Fluidized bed, 73
a...Discharge opening (first discharge port), 93...Punch metal (material conveyance surface), 99...Second discharge port,
101... first discharge port, 120... vibrating sieve, 130... vibrating conveyor, 140... vibrating flow sorter, 150... vibrating specific gravity sorter, e, f,
g...step.

Claims (1)

[Claims] 1. A first vibrating screen for removing foreign matter such as sand with a particle size smaller than the coffee bean material as a sieve is suspended in the trough, and a suction port is opened facing the discharge end of the first vibrating screen. a vibrating sieve provided with a suction duct, a suction device connected to the suction duct, and a sieve for removing foreign matter having a size larger than the particle size of the coffee bean material, such as wood chips, strings, etc. A vibrating sieve conveyor in which a second vibrating screen is stretched in a trough, and a conical fluidized bed as a low wall portion,
A first outlet is formed in the side wall at approximately the same height as the fluidized bed, and a second outlet is formed in the side wall at a predetermined height from the fluidized bed. A vibratory flow sorter equipped with a cylindrical container that performs torsional vibration, a supply duct extending from above toward the fluidized bed to a predetermined depth along the central axis of the cylindrical container, and a supply duct extending in the direction of transfer due to the flow. having a material transport surface as a fluidized bed formed with at least one step and inclined to one side with respect to the transport direction;
and a vibration specific gravity sorter having a first discharge port formed at the discharge end side and a second discharge port formed at the lower edge of the one side in the transfer direction of the material conveyance surface, a sieve, said vibrating sieve conveyor;
The vibrating flow sorter and the vibrating specific gravity sorter are sequentially arranged along the flow of the coffee bean material, and the coffee bean material supplied to the vibrating sieve is transferred on the first vibrating screen by vibration, and During the process, foreign matter such as sand with a smaller particle size than the coffee bean material is removed as a sieve, and foreign matter such as cotton, dust, and small sand is removed from the suction port by the suction device near the discharge end of the first vibrating screen. The coffee bean materials such as wood chips, strings, etc. Foreign matter having a size larger than the particle size is removed as the top of the sieve of the second vibrating screen, and the bottom of the sieve of the second vibrating screen is passed into the vibrating fluidized separator through the supply duct to the fluidized bed. the coffee bean material in the upper layer is discharged to the outside from the second discharge port;
The coffee bean material in the lower layer mixed with foreign matter such as pebbles having the same particle size as the coffee bean material is discharged from the first discharge port and supplied to the material conveying surface of the vibration specific gravity sorter, and Foreign matter having a higher specific gravity than the coffee bean material is located in the lower layer on the high specific gravity side, is stopped by the step, is transported along this by vibration, is discharged to the outside from the first discharge port, and is transferred to the upper layer side. A coffee bean material sorting device characterized in that the coffee bean material is rolled above the lower layer by vibration and gravity and is discharged to the outside from the second discharge port.