JPH11318723A - Chaffless coffee maker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chaffless coffee maker which enables higher performance and miniaturization of an attached coarse grinder as much as possible while simply and accurately removing chaff alone from coffee beans coarsely ground. SOLUTION: This apparatus is provided with a coarse grinder 2 of roasted coffee beans C, a closed strainer 3 adapted to sieve coarsely ground granular solid into coffee grains cg and chaffs ch and a vacuum type chaff sucker 4 to suck and remove the chaffs sieved alone. In the coarse grinder, grinders 2a-2c comprising a pair of blade rollers are arranged to be laid vertically in three stages and the blade roller of each grinder is belt driven by only one drive motor 5. The grinders are each provided with a roller clearance adjusting mechanism to make a clearance freely adjustable between the pair of blade rollers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coffee chaffless apparatus for separating roasted coffee beans into coffee grains and astringent skin called silver skin with a coarser, and removing the astringent skin.

[0002]

2. Description of the Related Art Conventionally, when producing coffee, coffee beans roasted using a coffee mill or the like are finely ground to a fine particle size to obtain granules, and the granules are converted to a coffee siphon or the like. To make coffee.

[0003]

By the way, coffee beans contain astringent skin called "silver skin" (hereinafter referred to as "chuff"), and unless the chaff is removed, the original taste and aroma of coffee can be enjoyed. Can not do. For this reason, it was a big problem how to remove the chaff from the finely ground coffee beans.However, with the conventional coffee bean grinder, the chaff was mixed in the granules after the coffee beans were ground. He was unable to remove unnecessary chaff.

The present invention has been made in order to solve the above-mentioned problem, and it is possible to simply and surely remove only the chaff from coarse coffee beans, and to make the attached roughing machine as high in performance as possible. It is an object of the present invention to provide a miniaturized coffee chafres apparatus.

[0005]

In order to achieve the above object, a coffee chaffles apparatus according to the present invention comprises a roughing machine for roughing roasted coffee beans to form granules having a predetermined particle size; A closed sieve for sifting the powder and granules supplied from the roughing machine into coffee grains and chaff, and a negative pressure type chaff suction device for sucking only the sifted chaff and discharging to the outside, Has a configuration in which grinders composed of a pair of blade rollers are vertically stacked in three stages, and the blade rollers of each grinder are belt-driven by only one drive motor. Preferably, each of the grinders is provided with a roller gap adjusting mechanism capable of freely adjusting the roller gap between the pair of blade rollers.

[0006]

The roasted coffee beans are crushed by a grinder composed of three layers of grinders to form powdered granules consisting of coffee granules of a predetermined size and chaff of a size that is easy to dispose of. Supplied to The supplied granules are separated into heavy coffee grains and light chaff by the screening action of the closed sieve, and the light chaff floats above the heavy coffee grains. And the chaff floating on the coffee grain is sucked up by the negative pressure type chaff suction device,
It is discharged outside the closed sieve. After the chaff is removed, the coffee grains are taken out of the closed sieve, and the coffee grains can be commercialized by squeezing the coffee grains.

In the case of the present invention, the grinder for roughing coffee beans comprises a grinder composed of a pair of blade rollers stacked vertically in three stages, and each grinder is provided with a roller gap between the pair of blade rollers. Since the roller gap adjusting mechanism is capable of freely adjusting the particle size of the ground coffee beans, the particle size of the ground coffee beans can be controlled very accurately, and only the chaff can be more reliably removed. Also, in the roughing machine, the blade roller of each grinder is driven by only one drive motor as a belt.
The size of the roughing device can be reduced, and the size of the coffee chaffless device as a whole can also be reduced.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, the chafless apparatus of the present invention includes a frame 1 serving as a gantry, and a roughing machine 2, a sealing sieve 3 and a negative pressure type chaff suction device 4 are arranged on the frame 1. Has been established.

The roughing machine 2 is installed on one side of the upper surface of the frame 1 (the right side in FIG. 1) and is configured to be driven by a belt by a driving motor 5. A hopper 7 having an opening / closing lever 6 for opening / closing and a transparent viewing window 7a is fixedly provided. The roughing machine 2 is constituted in three stages by three grinders 2a, 2b, 2c. By adjusting the grinding grain size of each grinder, it is possible to accurately grind the coffee beans C to a desired rough grain size. I can do it. This rough machine 2
Is connected to a drop feed pipe 9 composed of a bellows tube or the like via a guide cylinder 8 installed at the lower part of the pipe.
The detailed structure of the roughing machine 2 will be described later.

The closed sieve 3 is a closed container formed in a box shape such as a closed square or hexagon, and the lower end of the drop feeding pipe 9 is provided on one upper surface (right side in FIG. 1). On the other side (the left side in FIG. 1), a coffee grain discharge port 11 having an impeller-type discharger 10 is attached. Hanged horizontally. The hermetic sieve 3 has a base 13 attached to a lower portion thereof and a vibration mechanism 14 connected thereto. The base 13 and the vibration mechanism 14 are installed on a support base 15. The table 13 has coil springs 16 attached to the four corners on the upper surface, respectively, and the sealing sieve 3 is attached to # 13 via the coil springs 16.

The vibrating mechanism 14 has a pair of rotatable eccentric cam rollers 17, each of which is connected to the hermetic sieve 3 via a cam follower 18 attached to the lower surface of the hermetic sieve 3 and a mounting member 19. ing. A rotating shaft 20 is fitted to each eccentric cam roller 17, and the rotating shaft 20 is fixed to a bracket 21 via a bearing (not shown). A helical gear 22 is fitted on the rotating shaft 20 of one of the eccentric cam rollers 17, and the helical gear 22 is meshed with a helical gear 24 of an output shaft of a drive motor 23.

A V-belt 25 is wound around a pair of eccentric cam rollers 17, 17 via a pulley 26 between the rotating shafts 20, 20, and a pair of eccentric cam rollers 17, 17 are provided.
Are configured to rotate in synchronization. The support base 15 is rotatably supported at one end (left side in FIG. 1) on a column of the frame 1 by a pin 27, and the other end (right side in FIG. 1) is fed by a tilt angle adjusting mechanism 28. Nut 29
By rotating the rotary handle 30 and rotating the feed screw 31, the entire support base 15, the base 13, and the sealing sieve 3 are rotated around the pin 27 as a fulcrum, and the inclination angle of the sealing sieve 3 is reduced. It is configured to be adjustable. Since the feed nut 29 moves on the circumference around the pin 27, its position shifts in the radial direction, but this position shift is caused by the clearance between the male and female threads of the feed nut 29 and the feed screw 31. Can be absorbed.

The negative pressure type chaff suction device 4 includes a chuff tank 32 and a blower 33 for applying a negative pressure for suctioning the chaff to the chuff tank 32. The chaff tank 32 and the blower 33 are installed on the upper surface of the frame 1. I have. The chaff tank 32 has a lid 34 detachably covered on an upper opening surface. A filter 35 is set up near the blower 33 in the tank.
A suction bending pipe 36 is pierced near the wall on the side opposite to 5. The suction bending pipe 36 is drawn out to the upper position of the sealing sieve 3 by a bellows tube 37 or the like, and is exposed to the inside of the sealing sieve 3 by forked suction pipes 39a and 39b provided with chaff suction nozzles 38a and 38b at the ends. ing.

Next, the detailed structure of the roughing machine 2 will be described with reference to FIGS. In addition, this roughing machine 2 is configured by vertically stacking three grinders 2a to 2c in three stages, and each grinder 2a to 2c is formed on a peripheral surface of a blade roller for grinding coffee beans. The basic structure is the same, except for the size of the blade (blade) and the number of blades.

Each of the grinders 2a to 2c has a pair of blade rollers 201a, as shown in FIGS.
201b. As shown in FIGS. 8 and 9, a blade 203 having a triangular cross section is formed on the entire outer peripheral surface of the pair of blade rollers 201 a and 201 b along the rotation direction of the roller. Blade 2 having a sawtooth cross section along the axial direction
04 are engraved at equal angular intervals. A pair of blade rollers 2 having the blades 203 and 204 formed thereon
01a and 201b are arranged in parallel with a slight gap, and are crushed to a predetermined particle size by dropping roasted coffee beans into the gap.

As shown in FIG. 5, of the pair of blade rollers 201a and 201b, one blade roller 201b is fixedly arranged, and the other blade roller 201a has a predetermined angular range around a support shaft 211 as a fulcrum. It is assembled rotatably. A spring 205 is contracted between the bearing portions of the pair of roller blades, and the blade roller 201a is connected to the blade roller 201b.
The roller gap adjusting screw 206 is always urged in a direction away from the roller gap adjusting screw, and the tip of a roller gap adjusting screw 206 is brought into contact with the bearing portion of the rotatable blade roller 201a. By rotating the blade roller 201a, the blade roller 201a is pushed by its tip against the spring force of the spring 205, so that the gap width with the other blade roller 201b can be freely adjusted. The roller gap adjusting screw 206 is fixed to an adjustment position by a lock nut 207.

As shown in FIGS. 6 and 7, the pair of blade rollers 201a and 201b are meshed at one shaft end by gears 208a and 208b. When the belt 201a (or 201b) is driven, each of them rotates in the direction of the arrow (FIGS. 5 and 6) so that the coffee beans dropped into the gap between the blade rollers 201a and 201b are entrained and crushed. Is configured.

As shown in FIGS. 4 and 7, a sprocket 209a is provided at the shaft end of the blade roller 201a of the grinder 2a, a sprocket 209b is provided at the shaft end of the blade roller 201b of the grinder 2b, and the blade of the grinder 2c is provided. A sprocket 209a is axially mounted on the shaft end of the roller 201a. One sprocket 209a to 209c and one sprocket 501 (see FIG. 1) fixed to the rotation shaft of the drive motor 5 are provided. A drive belt 502 is stretched around and the drive motor 5 is rotated in the direction indicated by an arrow, so that the blade rollers 201a and 201b of the grinders 2a to 2c are rotated.
Are configured to rotate in the direction indicated by the arrow. Thus, the blade rollers 201a and 201b of all the grinders 2a to 2c can be driven at the same time by only one drive motor 5, so that the roughing machine 2 can be made smaller.

Each of the sprockets 209a to 209c attached to each of the grinders 2a to 2c is configured such that the diameter of the sprocket becomes smaller from the upper stage to the lower stage. , 201b is rotated more quickly so that the coffee beans that are crushed while being dropped from top to bottom are not clogged in the middle grinder portion. Guide plates 210 are provided around the blade rollers 201a and 201b of each of the grinders 2a to 2c to collect the coffee beans ground by the rollers and drop the coffee beans downward.

In the coffee chafles apparatus having the above-described structure, to grind coffee beans, first, the rotating handle 30 of the tilt angle adjusting mechanism 28 is turned, and the support base 1 shown in FIG.
5 is tilted by a predetermined angle so that it rises to the right. Further, a pair of blade rollers 208 are turned by turning the roller gap adjusting screws 206 of the grinders 2a to 2c of the roughing machine 2.
The roller gap between a and 208b is adjusted, and the crushing particle size of each grinder is set to a specified particle size. Normally, the upper grinder 2a puts coffee beans on the left and right sides of the middle seam.
The middle grinder 2b is set to such a degree that the chaff adhering to the coffee beans split into two by the upper grinder 2a is peeled off, and the lower grinder 2c is set. Is set to be a roller gap that gives a desired final coarse grain size.

Next, coffee beans C roasted in the hopper 7
And turn on a power switch (not shown). Then
The driving motor 5 for the roughing machine 2 rotates, and all the blade rollers 208 of each of the grinders 2a to 2c are driven by one driving belt 502 connecting the driving motor 5 and the roughing machine 2.
a and 208b start rotating at the same time. Further, when the drive motor 24 of the vibration mechanism 14 rotates and the eccentric cam roller 17 rotates, the sealing sieve 3 vibrates while being supported by the coil spring 16. Further, the blower 33 of the negative pressure type chaff suction device 4 rotates, and the chaff tank 32, the suction bending pipe 36, the bellows tube 37, the forked suction pipes 39a and 39b, and the chaff suction nozzle 38 at the tip thereof.
The air in the closed sieve 3 is sucked in through the a and 38b, and the inside of the closed sieve 3 is brought into a substantially vacuum state.

When the respective mechanisms start operating as described above, the opening / closing port is opened by pulling the opening / closing lever 6 of the hopper 7, and the coffee beans in the hopper 7 are fed into the roughing machine 2. The coffee beans C put into the roughing machine 2 are crushed while passing through the three grinders 2a to 2c to become coffee granules cg having a desired particle size and powdered granules composed of chaff ch.
And a closed sieve 3 inclined through the inside of the drop feeding pipe 9
Falling inside.

The granules falling into the closed sieve 3 are separated by the vibrating closed sieve 3 into a heavy coffee bar cg and a light chaff ch. Heavy coffee grains c
Float on g. In this manner, when the chaff ch slides down toward the coffee grain discharge port 11 in the inclined sieve 3 with the chaff ch floating above the coffee grain cg, the negative pressure of the suction nozzles 38a and 38b provided in the middle thereof. Only the chaff ch with a light specific gravity is sucked up together with the internal air by the pressure, and the forked suction pipes 39a, 39b,
It is stored in the chaff tank 32 via the bellows tube 37 and the suction bending tube 36.

Since the filter 35 is provided upright at a position near the blower 33 in the chaff tank 32 and separates from the chaff ch side, the chaff ch accumulated in the chaff tank 32 does not flow into the blower 33. , Blower 33
And the chaff ch can be prevented from scattering. Further, by opening the lid 32, the chaff ch accumulated in the tank can be easily taken out and discarded.

When the chaff ch is removed from the coffee beans coarsened by the roughing machine 2 in this way, the coffee grains cg remaining after being sorted are transferred to the coffee grain outlet 11 along the inclined surface of the closed sieve 3. Flowing down towards
The coffee grains are taken out through an impeller-type ejector 10 attached to the tip of the coffee grain outlet 11. And then
The product is narrowed by a coffee mill or the like (not shown) to be a product.

[0026]

As described above, according to the coffee chafes apparatus of the present invention, the coffee beans are ground by the grinder configured by stacking the grinders in three stages, so that the coffee beans can be ground accurately according to the desired particle size. In addition, coffee grains and chaff are sorted out by a closed sieve, and only the lighter specific gravity chaff is removed by a negative pressure type chaff suction device, so that only pure coffee grains can be easily and reliably taken out. It is possible to fully enjoy the original taste and aroma of coffee. In addition, despite having a three-stage grinder equipped with a pair of blade rollers, all the blade rollers are rotated by a single drive motor. The mechanism can be reduced in size, and the size of the entire coffee chiller apparatus can be reduced. For this reason, it can be used even in a small shop where the installation space such as a coffee specialty shop or a coffee shop does not have much room.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a coffee chaffles apparatus according to the present invention.

FIG. 2 is a rear view of FIG.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is an enlarged front view of the roughing machine.

FIG. 5 is an enlarged vertical sectional view of the roughing machine.

FIG. 6 is an enlarged rear view of the roughing machine.

FIG. 7 is an enlarged plan view of the roughing machine.

FIG. 8 is an enlarged partial front view of the roller blade.

FIG. 9 is an enlarged partial side view of the roller blade.

[Explanation of symbols]

 Reference Signs List 1 frame 2 roughing machine 2a to 2c grinder 3 closed sieve 4 negative pressure type chaff suction device 5 drive motor for roughing machine 6 opening and closing lever 7 hopper 7a viewing window 8 guide cylinder 9 drop feeding pipe 10 impeller discharger 11 Coffee grain outlet 12 Hanger 13 units 14 Vibration mechanism 15 Support base 16 Coil spring 17 Eccentric cam roller 18 Cam follower 19 Mounting member 20 Rotating shaft 21 Bracket 22 Helical gear 23 Drive motor for vibration mechanism 24 Helical gear 25 Belt 26 pulley 27 pin 28 inclination angle adjusting mechanism 29 feed nut 30 rotation handle 31 feed screw 32 chaff tank 33 blower 34 lid 35 filter 36 suction curved pipe 37 bellows tube 38a, b chaff suction nozzle 39a, b suction pipe 201a, b blade roller 203 B Blade 204 blade 205 spring 206 roller gap adjusting screw 207 lock nut 208a, b gear 209 sprocket gear 210 guide plate 211 support shaft 501 drive gear 502 drive belt C coffee bean cg coffee grain ch chaff

Claims (2)

[Claims] 1. A roasting machine for roasting roasted coffee beans to form granules having a desired particle size, and sieving the granules supplied from the roughing machine into coffee granules and chaff. It is provided with a closed sieve and a negative pressure type chaff suction device for sucking only the sifted chaff and discharging it to the outside, and the roughing machine is configured by vertically stacking a grinder consisting of a pair of blade rollers in three stages. In addition, the coffee roller apparatus wherein the blade roller of each grinder is driven by a belt by only one drive motor. 2. The coffee chaffless apparatus according to claim 1, wherein each of said grinders is provided with a roller gap adjusting mechanism capable of freely adjusting a roller gap between said pair of blade rollers.