JPH05161488A - Apparatus for polishing coffee bean - Google Patents

Abstract

PURPOSE:To prevent the lowering of the capacity of polishing coffee beans caused by the damage of a brush. CONSTITUTION:A polishing rotor 7 having a number of wires 11 planted on the circumference in the form of a-brush 12 is attached to a rotary shaft 5 rotatably inserted into a polishing cylinder 3 having a hole. The brush 12 is divided into plural sections with plural partition plates 13 radially placed relative to the direction of the shaft 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coffee bean polishing apparatus for removing the silver crust of coffee beans.

[0002]

2. Description of the Related Art FIG. 5 is a sectional view of a fruit of coffee.
A pulp 22 is provided between the outer skin 20 and the inner skin 21 and a silver skin 23 is provided inside the inner skin 21. And the seeds are wrapped in silver skin,
This is so-called coffee beans 24 (Fig. 6).

Since the purpose of harvesting coffee is to obtain coffee beans 24, it is necessary to remove the outer pericarp 20, the pulp 22 and the inner pericarp 21 from the fruits after harvesting. Widely wet (washed coffee). That is, the collected fruits are immersed in an aquarium, only the mature seeds that have sunk to the bottom are taken out, the pulp is removed by a slaughter machine, the flesh is floated again in the aquarium, and only the seeds are fermented. Fermentation time is 12 to 18 hours at high temperature and 30 to 40 hours at low temperature. Next, this is washed with water while stirring, and then dried sufficiently in the sun or artificial heat in a drying place. This is a parchment coffee with inner skin 19, which is removed by filtering with a roller at a drying place, an export port or an importing country, and then screened.

However, the silver peel 23 and the center cut portion 25 (which surrounds the silver peel) on the bean surface tend to remain only in the peeling process for removing the parchment, which lowers the commercial value. was there.

Therefore, there is known a coffee bean polishing apparatus for removing the silver skin and the silver skin of the center cut portion from the coffee beans, which will be described with reference to FIG. A polishing device (not shown) has a plurality of polishing rollers 27 rotatably mounted on a main shaft 26.
A large number of steel wires 29 are planted in 8 to form a brush 30. Next, the operation will be described. In the coffee beans supplied to the polishing device, the silver skin of the center cut portion 25 is scraped out by the brush 30 of the rotating polishing roller 27.

[0006]

However, in the conventional coffee bean polishing apparatus as described above, the brush bends during polishing and the brush repeatedly breaks due to fatigue damage, or coffee beans are caught in the tip of the brush, The load is concentrated on that part and the brush is damaged. Therefore, there are drawbacks that the polishing ability of the coffee beans is significantly reduced or the coffee beans cannot be polished.

The present invention solves the above drawbacks,
By preventing the brush from bending, it is intended to prevent the coffee bean polishing ability from being deteriorated due to the damage of the brush or the like.

[0008]

[Means for Solving the Problems] Polishing of coffee beans in which a polishing trochanter formed by arranging a large number of wire rods on the peripheral surface of a shaft rotatably provided in a perforated polishing cylinder is mounted on the shaft. In the device, the brush is divided by a plurality of partition plates arranged radially in the axial direction.

[0009]

[Action and effect] In the coffee beans from which the inner skin has been removed by the inner skin removal process and a part of the silver skin has been removed, the silver skin of the center cut part is scraped out by the brush of the rotating polishing trousers. The silver skin remaining on the surface of the grains is also peeled off by friction between the grains, and both are leaked from the polishing cylinder with holes.

Since the brush of the polishing trochanter is divided by a plurality of partition plates radially arranged with respect to the axial direction, the brush is restricted by the partition plates, so that the brush is largely bent. In this way, fatigue damage due to repeated bending is prevented, and even if coffee beans are caught in the tip of the brush, no concentrated load is generated and damage to the brush is prevented. Therefore, it is possible to prevent the polishing ability of coffee beans from being significantly reduced or to be unable to be polished due to the damage of the brush, and it is possible to significantly extend the life of the brush.

[0011]

Embodiments of the present invention will be described with reference to FIGS. Reference numeral 1 is a polishing device for removing the silver skin of coffee beans, and a shutter 4 for opening and closing the supply port 3 is provided at a supply port 3 connected to the supply tank 2. Further, a spiral rotator 6 and a plurality of polishing trochanters 7 are mounted on a main shaft 5 which is rotatably provided side by side, and a perforated polishing cylinder 8 is provided so as to surround the polishing trochanters 7 and A polishing chamber 9 is formed between the polishing cylinder 8 and the polishing cylinder 8. The polishing trochanter 7 is formed into a brush 12 by implanting a large number of steel wires 11 on the peripheral surface of the brush mounting body 10, and the brush 12 is composed of a plurality of partition plates 13 arranged radially in the direction of the axis 5. It is divided by. Both ends of the partition plate 13 are fitted to the side plates 14 and 14, and the brush mounting body 10 is mounted to the boss 15.
The tip of the polishing trochanter 7 is connected to the discharge port 16, and a compression resistance plate 17 is provided at the discharge port 16. The perforated polishing cylinder 8 has a dust removing chamber 18
The suction device 19 is communicated via.

Next, the specific operation of the above embodiment will be described. Into the supply tank 2, put the coffee beans from which the inner skin has been removed by an inner skin removing device (not shown), and open the shutter 4 so that the coffee beans can be fed from the supply port 3 into a spiral trochanter. Sent to 6. Then, the coffee beans 22 are sent to the polishing trochanter 7 by the grain transfer action of the spiral trochanter 6, and the brush 1
The silver skin in the center cut portion 25 is removed by the second steel wire 11, and further, the silver skin 23 remaining on the surface of the coffee beans is completely removed due to the friction of the polishing rotator 7 during the rotation. It The coffee beans 24 from which the silver skin 23 has been removed are discharged from the discharge port 16 to the outside of the machine, and the grinding degree of the coffee beans 24 is adjusted by adjusting the compression resistance plate 17.

The silver skin and dust thus removed are
It is immediately discharged from the perforated polishing cylinder 8 and falls into the dust removing chamber 18, and is discharged to the outside by the suction force of the suction device 19.

Since the brush 12 is regulated by the partition plate 13, the brush 12 does not cause a large bend during polishing, which prevents fatigue damage due to repeated bends, and at the tip of the brush. Even if the bite is caught, the brush 12 is prevented from being damaged without generating a concentrated load.

Although the brush 12 is divided into eight equal parts in this embodiment, the present invention is not limited to this and may be divided appropriately. Further, although the brush 12 is formed of a large number of steel wires 11, the brush may be formed of various wire materials such as resin.

Further, in the present embodiment, five polishing rollers 7 are mounted on the main shaft 5, but the present invention is not limited to this.
One long polishing trochanter 7 may be mounted on the shaft. Further, the length of the partition plate 13 is not limited to that of this embodiment, but may be various lengths such as the length reaching the axis.

The coffee beans discharged from the discharge port 16 may be circulated again in the supply tank 2.

[Brief description of drawings]

FIG. 1 is a partial side sectional view of a coffee bean polishing apparatus according to the present invention.

FIG. 2 is a side sectional view of a polishing trochanter.

FIG. 3 is a perspective view of a polishing trochanter.

FIG. 4 is a perspective view of a conventional polishing trochanter.

FIG. 5 is a cross-sectional view of coffee fruit.

FIG. 6 is a perspective view of coffee beans.

[Explanation of symbols]

 1 Polishing Device 2 Supply Tank 3 Supply Port 4 Shutter 5 Spindle 5 Spiral Rotor 7 Polishing Roller 8 Polishing Cylinder 9 Polishing Chamber 10 Brush Mounting Body 11 Steel Wire 12 Brush 13 Partition Plate 14 Side Plate 15 Boss 16 Discharge Port 17 Pressure Resistance plate 18 Dust removal chamber 19 Suction machine 20 Outer skin 21 Inner skin 22 Fruit pulp 23 Silver skin 24 Coffee beans 25 Center cut part 26 Spindle 27 Polishing trouser 28 Brush mount 29 Steel wire 30 Brush

Claims (1)

[Claims] 1. A shaft rotatably provided in a perforated polishing cylinder,
In a coffee bean polishing device in which a polishing trochanter formed by brushing a large number of wire rods on the peripheral surface is axially mounted, the brush is divided by a plurality of partition plates radially arranged in the axial direction. A coffee bean polishing device characterized in that