JP2008104651A - Apparatus for separation disposal of crushed coffee beans - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for separation disposal of crushed coffee beans, which with a simple structure can efficiently and securely separate the beans and the coat from the crushed coffee beans mixed with beans and coat. <P>SOLUTION: The apparatus 1 has a main body 2 with a receptor slot 3 for the roasted and crushed coffee beans mixed with the berry and the coat provided at the upper end, a falling flow channel 17 for the crushed coffee beans provided inside, and a discharging slot 5 provided at the bottom, an air introducing section 14 provided on one side wall 11a of the main body 2, air passing holes 15 provided on the other side walls 11b of the main body 2, discharge ducts 30 connected with each air passing hole 15 provided at the outer wall of the other side wall 11b, and suction blowers which are connected to the discharge ducts 30 and suck and remove only the coats mixed into the crushed coffee beans from inside the main body 2 by applying suction force on the crushed coffee beans mixed with beans and coat falling inside the curved falling flow channel 17 to make the beans mixed in the crushed coffee beans fall by its own weight to the discharging slot 5 at the lower end of the main body 2 inside the falling flow channel 17. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pulverized coffee bean separation processing device, and more particularly, pulverized coffee beans that can be efficiently separated from crushed coffee beans in which the coffee beans are roasted and pulverized to mix the berries and the peels. The present invention relates to a sorting processing apparatus.

  In general, when roasting delicious coffee, roast coffee beans and pulverize them to obtain ground coffee beans that are a mixture of fruit and skin, and then remove the unwanted (astringent) peels. It is important to decoction using only the fruit.

  For this purpose, Patent Document 1 discloses that ground coffee beans containing good parts (real) and bad parts (skin) are put into a wind tunnel from a hopper and blown into the wind tunnel by a blower. Then, only the defective portion is blown to the side by wind pressure and captured by the filter for the defective portion, while the excellent portion is dropped down without being blown off and stored in the container for the excellent portion. A sorting apparatus has been proposed.

In the case of the coffee bean sorting apparatus disclosed in Patent Document 1, the wind tunnel area for selecting the good part and the bad part by wind pressure while dropping the crushed coffee beans is relatively short. For this reason, the good part and the bad part are sorted. It is difficult to sufficiently perform the above process, and there is a concern that a defective part that cannot be completely removed is accommodated in the container for the superior part.
Japanese Patent Laid-Open No. 10-191889

  A problem to be solved by the present invention is a ground coffee bean separation processing apparatus capable of efficiently and reliably separating the fruit and skin from ground coffee beans having a simple structure and a mixture of fruit and skin. There is no point.

  The ground coffee bean separation processing device of the present invention is a ground coffee bean separation processing device that separates ground coffee beans mixed with fruit and skin after pulverized roasted coffee beans. An inlet for the crushed coffee beans mixed, a drop channel for the crushed coffee beans in which fruit and skin are mixed inside, a substantially rectangular tubular main body provided with a discharge port at the lower end, and one of the main body An air introduction part provided on the side wall part of the main body part, an air passage hole part provided on the other side wall part opposite to the one side wall part in the main body part, and each air attached to the outer wall of the other side wall part A suction duct for the ground coffee beans that are connected to the discharge duct section and communicated with the passage hole section, and are mixed with the fruit and the skin that fall through the fall passage through the discharge duct section and the air passage hole section. Only the peel of the ground coffee beans Aspirate from the body portion, in fact the most important feature to have, a suction means for free-fall through the drop flow path outlet of the main body bottom.

  According to the first aspect of the present invention, the ground coffee beans mixed with the fruit and skin thrown into the receiving port of the main body part fall in the falling flow path. At this time, the suction means passes through the discharge duct part and the air passage. A suction force is applied to the ground coffee beans that are mixed with the fruit and the skin falling through the hole through the hole, and only the skin of the ground coffee beans is removed by suction from the main body. Since the inside is dropped by its own weight at the discharge opening at the bottom of the main body, the ground coffee can be efficiently and reliably separated from the ground coffee and the ground coffee with a simple structure. A separation processing apparatus can be provided.

  According to the invention described in claim 2, a plurality of air introduction parts having the same configuration as that of the invention described in claim 1 and arranged obliquely descending formed by a pair of parallel plates on the main body part, A plurality of air passage holes arranged opposite to the plurality of air introduction parts, and a curved drop flow path for ground coffee beans in which a fruit and a skin are mixed together with a parallel plate of the air introduction part in the main body part. A plurality of inclined partition plates formed in a range from the inlet to the discharge port are provided, and, as in the first aspect of the invention, the drop channel having a long bent distance is dropped while having a simple configuration. It is possible to provide a ground coffee bean sorting apparatus that can efficiently and reliably separate ground and peeled from ground coffee beans in which fruits and skins are mixed.

  According to the invention described in claim 3, in addition to the configuration of the invention of claim 2, the main body portion is vertically long which exposes the inward side of the inclined partition plate and the pair of parallel plates and the curved falling flow path. Since the visual recognition window part formed from the rectangular-shaped opening part and the transparent plate attached so that the whole opening part for this expression may be covered is provided, the effect similar to the invention of Claim 2 is exhibited. In addition, it is possible to provide a ground coffee bean separation processing apparatus that can visually recognize from the outside the state of separation of the ground coffee beans that fall on the bent flow path with a long bent distance.

  According to the invention described in claim 4, the structure is the same as that of the invention described in claim 3 and adopts six air introduction parts, six air passage holes, and six inclined partition plates. In addition, the ground coffee can be separated efficiently and reliably by the suction operation of the suction means while being bent a total of 12 times in the long falling flow path where the ground coffee beans are bent in the main body. A bean separation processing apparatus can be provided.

  The object of the present invention is to provide a ground coffee bean separation processing device that can efficiently and reliably separate the fruit and skin from the ground coffee bean in which the fruit and skin are mixed with a simple configuration. A ground coffee bean separation processing device that separates ground coffee beans after the roasted coffee beans are ground, and the ground coffee and coffee beans are separated. A drop channel for ground coffee beans with a mixture of fruit and skin inside, a substantially rectangular tube-shaped main body with a base plate with a discharge port at the lower end, and one side wall of this main body. 6 formed by a pair of parallel plates attached to each other so as to be inclined downwardly from the long sides of each square hole toward the inner center of the main body portion. Individual air inlets and the one in the main body. Six air passage holes formed in the vertical direction with a gap in the other side wall portion facing the side wall portion of the main body portion, and an inner space continuous from the other side wall portion of the main body portion to the six air passage hole portions. Each position so that each inner end occupies between each inner end of each parallel plate of the six air introduction portions. Six inclined slopes arranged in a range from the receiving port to the discharge port, which are arranged to be shifted and form a bent flow path for ground coffee beans in which the fruit and the skin are mixed together with the parallel plate of the air introduction unit A partition plate, a discharge duct portion having a suction channel and a terminal discharge port communicating with each air passage hole portion attached to the outer wall of the other side wall portion, and another body forming a main body portion together with the both side wall portions Each of the inclined partition plates and the pair provided on each of the two side wall portions A transparent plate attached to each of the other two side walls so as to cover the inner side of the parallel plate and a vertically long rectangular opening for exposing the bent falling flow path and the entire opening for the expression. And a fruit and skin that are connected to the end connection plate side of the discharge duct portion and fall in the bent drop passage through the discharge duct portion and each air passage hole portion. Applying a suction force to the ground coffee beans mixed together, only the peel of the ground coffee beans is sucked and removed from the inside of the main body. And a suction means for dropping.

  Below, the coffee bean separation processing apparatus 1 which concerns on the Example of this invention is demonstrated in detail with reference to FIG. 1 thru | or FIG.

  As shown in FIG. 1, the coffee bean separation processing device 1 according to the present embodiment is a device that separates ground coffee beans 60 in which fruit 61 and skin 62 are mixed after roasted coffee beans are ground. As shown in FIG. 1, as a whole, the main body portion 2 is formed in a substantially rectangular tube shape, a discharge duct portion 30 attached to the main body portion 2, and suction means for sucking air or the like connected to the discharge duct portion 30. A suction blower 50.

  The main body 2 includes an upper end 4 having a rectangular receiving port 3 for charging ground coffee beans in which a fruit 61 and a skin 62 are mixed at the upper end, and a base plate 6 having a discharge port 5 at the lower end. Integrated.

  Further, in the region extending from one side wall portion 11a of the main body portion 2 to the inner side of the main body portion 2, there are six square holes 12 arranged in a vertical direction at intervals, and both parallel lengths of the respective square holes 12 Six pieces formed by a pair of parallel parallel plates 13a and 13b attached to each other so as to descend obliquely from the side toward the inner center of the main body 2 (for example, an angle of 45 degrees with respect to the vertical direction). An air introduction unit 14 is provided.

  Furthermore, six rectangular air passage holes 15 are provided in the other side wall 11b facing the one side wall 11a in the main body 2 so as to be vertically spaced at intervals.

  In the main body portion 2, the main body portion 2 descends obliquely toward the center of the interior in a state in which an inner space continuous from the other side wall portion 11 b to the six air passage hole portions 15 is partitioned, Six inclined partition plates 16 are attached that are arranged with their positions shifted so that the end thereof occupies the position between the inner ends of the parallel plates 13a and 13b in the six air introduction portions 14. That is, the inner ends of the parallel plates 13a and 13b and the inner ends of the inclined partition plate 16 are not in contact with each other and are arranged so as to have a gap above and below.

  Further, the inner ends of the parallel plates 13a and 13b and the inner ends of the inclined partition plates 16 prevent the ground coffee beans 60 introduced from the receiving port 3 from falling straight down in the main body 2. The horizontal projecting dimension from the side wall portions 11a and 11b is set. That is, the inner ends of the parallel plates 13a and 13b and the inner ends of the inclined partition plate 16 are set so as to overlap each other when viewed from directly above.

  Thereby, in the said main-body part 2, it is bent for the ground coffee beans 60 in which the said fruit 61 and the skin 62 are mixed together with each parallel plate 13a, 13b of each said air introduction part 14, (in the shape of a U-shape, conversely The falling flow path 17 (bent so that the shape is continuous) is formed in the range from the receiving port 3 to the discharge port 5.

  Here, the six air introduction parts 14, the six air passage hole parts 15, and the six inclined partition plates 16 of the main body part 2 will be described in more detail. The main body 2 has an inner frame 21 that is framed so that the overall shape thereof is a vertically long rectangular parallelepiped, and a wall thickness that covers the outer surfaces of the walls 21 a and 21 b that form the side walls 11 a and 11 b of the inner frame 21. However, it has a double structure with an exterior plate 22 that is thin and has a beautifully finished outer surface.

  That is, the inner frame body 21 is provided with the parallel plate 13a and 13b through which four rectangular holes are arranged on the side of the wall portion 21a that forms one side wall portion 11a, and the wall portion that forms the side wall portion 11b. Six rectangular air passage holes 15 are provided on the 21b side, and further, vertical rectangular opening 18 are provided on the side walls 21c and 21d forming the side walls 11c and 11d.

  And the said square hole 12 is formed in the exterior plate 22 which covers the wall part 21a by the side wall part 11a side, and it penetrates the said square hole from the parallel long side of each square hole 12, and is inward center of the main-body part 2. A total of six air introduction portions 14 are formed by attaching a pair of parallel parallel plates 13a and 13b to an arrangement that descends obliquely toward the surface.

  In addition, the exterior plate 22 that covers the wall portion 21b on the side wall portion 11b side is provided with six rectangular openings corresponding to the six air passage hole portions 15, respectively. In addition to ensuring the distribution, the six inclined partition plates 16 are arranged from the respective opening portions toward the inside of the main body 2 as described above.

  The exterior plate 22 is integrally attached to the inner frame 21 using hexagon screws 23 and nuts 24.

  Furthermore, the vertically long rectangular opening 18 provided on the side of the walls 21c and 21d forming the side walls 11c and 11d of the inner frame 21 is formed as shown in FIGS. The inside of the partition plate 16 and the pair of parallel plates 13a and 13b and the bent drop flow path 17 are exposed to the outside, and the opening 18 for exposure is formed with respect to the walls 21c and 21d. A transparent plate 19 (for example, a transparent glass plate or a transparent synthetic resin plate) 19 is integrally attached using, for example, six screws 25 so as to cover the whole, and the opening 18 and the transparent plate 19 are used to The visual recognition window part 20 which makes visible the ground coffee bean which the said fruit 61 and the skin 62 which fall in the fall flow path 17 coexist is visible from the outside is formed.

  A base plate 6 provided with a discharge port 5 connected to the falling flow path 17 is fixed to the lower end of the main body 2 so as to support the main body 2 in a vertical arrangement or a substantially vertical arrangement. Moreover, the lower end area | region which continues to the base plate 6 of the main-body part 2 is made into the shape which gradually reduces as the dimension between side wall parts 11a and 11b reaches the base plate 6 side, as shown in FIG.1, FIG.4.

  On the outer wall side of the other side wall portion 11b of the main body portion 2, a hollow discharge duct portion 30 having a suction flow channel 41 and an end connection plate 42 communicating with each air passage hole portion 15 is attached. .

  The discharge duct portion 30 has a suction air amount that increases toward the upper side corresponding to the provision of the six air passage hole portions 15 in the other side wall portion 11b. 15, the dimension from the side wall 11 b gradually increases from the lower side to the upper side, and a pair of additional side plates 31 having a fixed dimension on the upper side from the upper end position of the main body part 2 are arranged in parallel to the side wall part 11 b and vertically Attached along the direction.

  Further, a connecting cylinder 33 formed in a square tube shape is attached to the upper end portions of the pair of attachment side plates 31 by adhesion or the like, and the pair of the connecting cylinders 33 is provided from below the lowermost air passage hole 15 to the lower end of the connecting cylinder 33. The decorative plate 34 is disposed so as to close the opening formed by the attached side plates 31, and the six air plates are fixed to the pair of attached side plates 31 using, for example, six screws 35. A suction channel 41 that communicates with the passage hole portion 15 and communicates with the outside through the inside of the connecting cylinder 33 is formed.

  On the end face of the connecting cylinder 33, an end connecting plate 42 having a rectangular shape with holes 43 for connecting to external devices and the like at the four corners and holes 42 a having the same dimensions as the cylindrical holes of the connecting cylinder 33 is provided. Are joined by bonding or the like.

  Although a specific connection structure is omitted, a suction blower 50 as suction means is connected to the end connection plate 42 side of the discharge duct portion 30 as shown in FIG.

  The suction blower 50 applies a suction force to the ground coffee beans that are mixed with the fruit 61 and the skin 62 that fall in the bent drop passage 17 through the discharge duct portion 30 and the air passage hole portions 15. Of the ground coffee beans 60, only the extremely light skin 62 is sucked from the falling flow path 17 and removed to the outside of the coffee bean separation processing device 1 through the air passage holes 15 and the suction flow path 41, and then ground. The coffee beans 60 that are heavier than the skin 62 are configured so that the fruit 61 is dropped in the falling flow path 17 by its own weight below the discharge port 5 of the main body 2 and further below.

  Next, the sorting processing operation of the ground coffee beans 60 by the coffee bean sorting processing device 1 according to the present embodiment will be described with reference to FIG.

In the coffee bean sorting apparatus 1 according to the present embodiment, first, the main body 2 is placed vertically and the suction blower 50 is in an operating state, and then roasted into the receiving port 3 of the main body 2, The ground coffee beans 60 mixed with the skin 62 are introduced.

The ground coffee beans 60 charged into the main body 2 are arranged in such a manner that the falling flow path 17 having a long bending distance formed by the parallel plates 13a and 13b and the inclined partition plate 16 is passed through the parallel plates 13a and 13b and the inclined plates. While colliding with the partition plate 16, it sequentially falls toward the discharge port 5. At this time, the suction blower 50 sucks the inside of the drop channel 17 through the discharge duct portion 30 and each air passage hole portion 15. A suction force is applied to the ground coffee beans 60 in which the fruit 61 and the skin 62 falling are mixed, and air is sucked in from the six air introduction parts 14, and the weight of the ground coffee beans 60 is reduced by this air flow. Only 62 can pass through the six air passage holes 15 from the inside of the main body 2, and can be sucked and removed outside through the suction flow path 41 of the discharge duct 30. On the other hand, the fruit 61, which is heavier than the skin 62, causes the weight of the suction blower 50 to fall within the drop channel 17 to the discharge port 5 at the lower end of the main body 2 and further to the outside by appropriately setting the suction force of the suction blower 50. Thus, it becomes possible to obtain a coffee material consisting only of the fruit 61 from which the skin 62 has been removed and to brew delicious coffee.

  Thus, according to the coffee bean separation processing device 1 according to the present embodiment, while having a simple configuration in which one suction blower 50 is connected to the main body portion 2 and the discharge duct portion 30 consisting only of the mechanism portion, To efficiently and reliably separate the falling flow path 17 in which the fruit 61 and the skin 62 are bent from the ground coffee bean 60 in which the fruit 61 and the skin 62 are mixed, to obtain a coffee material made only of the fruit 61 Can do.

  Further, according to the coffee bean sorting apparatus 1 according to the present embodiment, the inclined partition plate 16 and the inner side of the pair of parallel plates 13a and 13b as well as the bent drop flow path 17 are displayed on the main body 2. Since a viewing window 20 formed from a vertically long rectangular opening 18 and a transparent plate 19 attached so as to cover the entire opening 18 is provided, the drop channel 17 is dropped. The state of separation between the fruit 61 and the skin 62 of the ground coffee beans 60 to be checked can be visually recognized from the outside, and the state of the separation processing of the ground coffee beans 60 can be confirmed.

  Furthermore, according to the present embodiment, the main body 2 has a structure in which the six air introduction portions 14, the six air passage hole portions 15, and the six inclined partition plates 16 are provided. In the falling flow path 17 having a long distance in which the ground coffee beans 60 are bent, the actual 61 and the skin 62 are efficiently and reliably separated by the suction operation of the suction blower 50 while being bent a total of 12 times. The ground coffee bean separation processing apparatus 1 which can be provided can be provided.

  In addition to being applied to the above-described separation processing of ground coffee beans, the present invention can be widely applied to applications in which fruit and skin are subjected to a separation processing from a pulverized product such as another kind of beans and cereals.

It is a front view of the coffee bean classification processing apparatus which concerns on the Example of this invention. 1 is a left side view of a coffee bean sorting apparatus according to an embodiment. It is a right view of the coffee bean classification processing apparatus which concerns on a present Example. FIG. 3 is a schematic enlarged sectional view taken along line AA in FIG. 2. It is a top view of the coffee bean classification processing apparatus which concerns on a present Example. It is a figure which shows a part of bottom face of the coffee bean classification processing apparatus which concerns on a present Example. It is explanatory drawing of the classification process of the ground coffee bean in the coffee bean classification processing apparatus which concerns on a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coffee bean separation processing apparatus 2 Main body part 3 Inlet 4 Upper end part 5 Outlet 6 Base plate 11a Side wall part 11b Side wall part 11c Side wall part 11d Side wall part 12 Square hole 13a Parallel plate 13b Parallel plate 14 Air introduction part 15 Air passage Hole portion 16 Inclined partition plate 17 Falling flow path 18 Opening opening 19 Transparent plate 20 Viewing window portion 21 Inner frame 21a Wall portion 21b Wall portion 21c Wall portion 21d Wall portion 22 Exterior plate 23 Hexagon screw 24 Nut 25 Screw 30 Discharge duct portion 31 Additional side plate 33 Connecting cylinder 34 Decorative plate 35 Screw 41 Suction channel 42 End connection plate 42a Hole 43 Hole 50 Suction blower 60 Ground coffee beans 61 Actual 62 Skin

Claims (4)

A ground coffee bean separation processing device that separates ground coffee beans that are mixed with fruit and skin after grinding roasted coffee beans,
An approximately square tube provided with an inlet for the ground coffee beans mixed with fruit and skin at the upper end, a falling channel for ground coffee beans mixed with fruit and skin inside, and an outlet at the lower end A main body of a shape,
An air introduction portion provided on one side wall portion of the main body portion;
An air passage hole provided in the other side wall facing the one side wall in the main body,
A discharge duct portion communicating with each air passage hole portion attached to the outer wall of the other side wall portion;
It is connected to this discharge duct part, acting a suction force on the ground coffee beans mixed with fruit and skin falling through the discharge duct part and the air passage hole part, and among the ground coffee beans Sucking and removing only the skin of the body from the inside of the main body part, and the suction means for dropping the weight of the ground coffee beans into the discharge port at the lower end of the main body part by its own weight
A ground coffee bean sorting apparatus characterized by comprising: A ground coffee bean separation processing device that separates ground coffee beans that are mixed with fruit and skin after grinding roasted coffee beans,
An approximately square tube provided with an inlet for the ground coffee beans mixed with fruit and skin at the upper end, a falling channel for ground coffee beans mixed with fruit and skin inside, and an outlet at the lower end A main body of a shape,
A pair of square holes lined up and down on one side wall part of the main body part and a pair attached in an obliquely descending direction from both long sides of each square hole toward the inner center of the main body part A plurality of air inlets formed by each parallel plate;
A plurality of air passage holes formed vertically in the other side wall portion facing the one side wall portion in the main body portion with a space therebetween;
The inner wall descends obliquely toward the center of the interior in a state in which an inner space connected to the plurality of air passage hole portions is defined from the other side wall portion of the main body portion, and each inner end thereof is the plurality of air. Each of the parallel plates in the introduction part is arranged so as to occupy between the inner ends of each parallel plate, and is bent for ground coffee beans in which the fruit and the skin are mixed together with the parallel plate of the air introduction part in the main body part. A plurality of inclined partition plates that form a falling channel in a range from the receiving port to the discharging port;
A discharge duct portion having a suction channel communicating with each air passage hole portion attached to the outer wall of the other side wall portion;
Connected to the end side of this discharge duct part, it acts a suction force on the ground coffee beans mixed with fruit and skin that fall through the bent drop passage through the discharge duct part and each air passage hole part Suction means for sucking and removing only the peel of the ground coffee beans from the inside of the main body, and the fruit of the ground coffee beans is dropped by its own weight into the discharge port at the lower end of the main body,
A ground coffee bean sorting apparatus characterized by comprising: A ground coffee bean separation processing device that separates ground coffee beans that are mixed with fruit and skin after grinding roasted coffee beans,
A base plate provided with an inlet for the ground coffee bean in which fruit and skin are mixed at the upper end, a falling channel for the ground coffee bean in which fruit and skin are mixed, and a discharge port at the lower end A substantially rectangular tube-shaped main body with
A pair of square holes lined up and down on one side wall part of the main body part and a pair attached in an obliquely descending direction from both long sides of each square hole toward the inner center of the main body part A plurality of air inlets formed by each parallel plate;
A plurality of air passage holes formed vertically in the other side wall portion facing the one side wall portion in the main body portion with a space therebetween;
The inner wall descends obliquely toward the center of the interior in a state in which an inner space connected to the plurality of air passage hole portions is defined from the other side wall portion of the main body portion, and each inner end thereof is the plurality of air. Each of the parallel plates in the introduction part is arranged so as to occupy between the inner ends of each parallel plate, and is bent for ground coffee beans in which the fruit and the skin are mixed together with the parallel plate of the air introduction part in the main body part. A plurality of inclined partition plates that form a falling channel in a range from the receiving port to the discharging port;
A discharge duct portion having a suction flow path and an end connection plate communicating with each air passage hole portion attached to the outer wall of the other side wall portion;
A vertically long rectangular expression that exposes the inclined partition plate and the inner side of each pair of parallel plates provided on each of the other two side wall portions that form the main body portion together with the both side wall portions, and a curved falling flow path. A viewing window formed from a transparent plate attached to each of the other two side wall portions so as to cover the entire opening portion for display and the opening portion for expression,
Connected to the end connecting plate side of the discharge duct part, the suction force to the ground coffee beans mixed with fruit and skin falling through the bent duct, via the discharge duct part and each air passage hole part A suction means that sucks and removes only the skin of the ground coffee beans from the inside of the main body, and the fruit of the ground coffee beans falls by its own weight into the discharge port at the lower end of the main body,
A ground coffee bean sorting apparatus characterized by comprising: A ground coffee bean separation processing device that separates ground coffee beans that are mixed with fruit and skin after grinding roasted coffee beans,
A base plate provided with an inlet for the ground coffee bean in which fruit and skin are mixed at the upper end, a falling channel for the ground coffee bean in which fruit and skin are mixed, and a discharge port at the lower end A substantially rectangular tube-shaped main body with
Attached to one side wall portion of the main body portion with six square holes arranged in the vertical direction with a gap and an arrangement that descends obliquely from both long sides of each square hole toward the inner center of the main body portion. Six air introduction parts formed by a pair of parallel plates;
Six air passage hole portions that are vertically drilled at intervals in the other side wall portion facing the one side wall portion in the main body portion;
The inner wall descends obliquely toward the center of the interior in a state in which an inner space connected to the six air passage hole portions is defined from the other side wall portion of the main body portion, and each inner end thereof is the six air Each of the parallel plates in the introduction part is arranged so as to occupy between the inner ends of each parallel plate, and is bent for ground coffee beans in which the fruit and the skin are mixed together with the parallel plate of the air introduction part in the main body part. 6 inclined partition plates that form a falling channel in a range from the receiving port to the discharging port;
A discharge duct portion having a suction channel and a terminal discharge port communicating with each air passage hole portion attached to the outer wall of the other side wall portion;
A vertically long rectangular expression that exposes the inclined partition plate and the inner side of each pair of parallel plates provided on each of the other two side wall portions that form the main body portion together with the both side wall portions, and a curved falling flow path. A viewing window formed from a transparent plate attached to each of the other two side wall portions so as to cover the entire opening portion for display and the opening portion for expression,
Connected to the end connecting plate side of the discharge duct part, the suction force to the ground coffee beans mixed with fruit and skin falling through the bent duct, via the discharge duct part and each air passage hole part A suction means that sucks and removes only the skin of the ground coffee beans from the inside of the main body, and the fruit of the ground coffee beans falls by its own weight into the discharge port at the lower end of the main body,
A ground coffee bean sorting apparatus characterized by comprising:

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