JPH0132996Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a coffee mill configured to recover the astringent skin peeled off from coffee beans during grinding of the coffee beans.

[Technical background of the invention]

Conventionally, in coffee mills, the astringent skin peels off when coffee beans break during grinding operation.
If this astringent skin was then cut into small pieces along with the coffee beans and mixed into the coffee powder, the coffee liquid extracted from the coffee powder would have a strong bitterness and astringency, resulting in a poor taste.
Therefore, we focused on the fact that the thin and light astringent skin is blown up by the wind generated inside the case due to the rotation of the crushing body, and in recent years, we have installed an astringent skin collection chamber at the top of the case and an astringent skin intake at the bottom of this astringent skin collection chamber. A device is provided in which the astringent skins blown upward as described above are taken into the astringent skin collection chamber through the astringent skin intake port.

[Problems with background technology]

However, in the case where the astringent skin collection chamber is provided, the collection of astringent skin relies on the wind generated by the rotation of the crusher, so the amount of astringent skin that can be taken into the astringent skin collection chamber is small, and moreover, the amount of astringent skin that can be taken into the astringent skin collection chamber is small. The astringent skin may be returned to the case by the wind, so the recovery rate of the astringent skin is generally low, and a large amount of astringent skin remains in the produced coffee powder.

[Purpose of invention]

Therefore, an object of the present invention is to provide a coffee mill that can increase the recovery rate of the astringent skin peeled off from coffee beans.

[Summary of the idea]

In this invention, a friction member that rotates together with the grinding body is provided in the case, and a static electricity generating member is provided in contact with this friction member, so that the static electricity generating member is rubbed by the friction member during grinding operation to generate static electricity. Static electricity is generated in the member, and this static electricity causes the astringent skins of coffee beans to be attracted to the static electricity generating member, and the focus is on the fact that the astringent skins are peeled off from almost all coffee beans in the early stages of grinding operation. A timer device is provided to cut off the power to the motor at least once during the crushing operation, and the wind generated by the rotation of the crushing body inside the case is temporarily weakened by temporarily stopping the crushing body, and during this period, the wind generated by the rotation of the crushing body is temporarily weakened. This allows the astringent skin to be adsorbed to the static electricity generating member without being disturbed by the wind.

[Example of idea]

An embodiment in which the present invention is applied to a coffee extractor with a grinder will be described below with reference to the drawings. Reference numeral 1 denotes a coffee brewer body, and a motor storage chamber 2 and a bottle mounting table 3 are formed on both left and right sides of the lower half of the body 1, and a case storage recess 4 and a water storage are formed on both left and right sides of the upper half. They each form a tank 5. 6 is a sheathed heater 8 and a heating tube 9 in the heating plate 7.
The hot water generation mechanism is constructed by burying the
A heating plate 7 is disposed in close contact with the lower surface of an electric heating plate 3a attached to the bottle mounting table 3. One end of the heating pipe 9 is extended upward and connected to the water storage tank 5, and the other end is extended above the case storage recess 4, and a hot water supply pipe 10 is connected to the upper end of the heating pipe 9 so as to be pivotable. Reference numeral 11 denotes a vertical shaft type motor disposed within the motor storage chamber 2, with its rotating shaft 11a protruding into the case storage recess 4 above. still,
In this example, an AC commutator motor is used as the motor 11. Reference numeral 12 denotes a case for both a grinder and a coffee extractor, which is removably housed in the case storage recess 4. This case 12 has a filter 14 attached to the bottom with a large number of small holes 13, and a shallow container-shaped receiver at the bottom. A container 15 is attached, and an extraction port 16 is formed at the lowest part of the inclined bottom of the container 15.
This extraction port 16 faces into the bottle 17 placed on the bottle mounting table 3. Reference numeral 18 denotes a cutter serving as a crushing body rotatably disposed at the center of the inner bottom of the case 12, and this cutter 18 is detachably connected to the rotating shaft 11a of the motor 11. on the other hand.
Reference numeral 19 denotes a hot water diffuser shaped like a shallow container that is removably fitted into the upper opening of the case 12. The bottom of the hot water diffuser 19 is formed into a spherical convex surface, and a plurality of hot water pouring holes 20 are formed on the outer periphery of the hot water diffuser 19. ing. Reference numerals 21 and 22 denote nylon brushes 2 which are friction members fixed to both ends of the cutter 18 in the case 12.
Reference numeral 3 denotes a shallow container-shaped static electricity generating member attached to the lower surface of the bottom of the hot water diffuser 19, which is made of synthetic resin such as acrylic styrene, and has a plurality of intake ports 24 in the side wall thereof. It is formed between the lower surface. The upper ends of the brushes 21 and 22 are brought into contact with the lower surface of the static electricity generating member 23. still,
Reference numeral 25 denotes a lid provided on the upper part of the container body 1 so as to be rotatable to open and close. Reference numeral 26 denotes a timer device provided in the body 1. This timer device 26 is driven by a mainspring or the like, and includes a cam switch 27 ( 2), a knob 28 provided on the front panel 1a of the vessel 1 to set the crushing operation time, and a start button 29 for starting the clock operation. Then, as shown in Figure 2, the cam switch 2
The fixed contact piece b of 7 is connected to the terminal 30 for power supply connection via the motor 11, and the fixed contact piece c is connected to the terminal 30 via the temperature fuse 31, the thermal switch 32, and the sheathed heater 8 of the hot water generation mechanism 6 in this order. It is connected to the. On the other hand, the movable contact piece d is connected to a power supply connection terminal 34 via a well-known lid switch 33 that is linked to the opening and closing of the lid 25. In addition, 35 is the motor 11
This is a noise prevention capacitor connected in parallel with the
Then, rotate the knob 28 and press the start button 29.
When the cam switch 27 is pressed, the contact pieces d-b and the contact pieces d-c are set to be closed for the period shown by the diagonal line in the time chart shown in FIG. During period b, closing and opening are repeated multiple times at the start of the crushing operation, so that the motor 11 is cut off multiple times at predetermined times.

Next, the operation of the above configuration will be explained. When extracting coffee liquid, the case 12 and the water storage tank 5 are filled with coffee beans and water in advance, and set in the state shown in FIG. 1. Then, when the knob 28 is rotated to a desired time position and the start button 29 is pressed, the timer device 26 starts timing operation and the contacts d and b of the cam switch 27 are closed.
energization is started, the cutter 18 is rotated, and the crushing operation is started. Then, the coffee beans in the case 12 are crushed by the rotation of the cutter 18, and the astringent skin is peeled off from the coffee beans. At the same time, the nylon brushes 21 and 22 fixed to the cutter 18 also rotate, so that the static electricity generating member 23
The lower surface is rubbed by the upper ends of both brushes 21 and 22, and static electricity is generated in the static electricity generating member 23, and this static electricity generates an adsorption force in the static electricity generating member 23 to attract thin and light objects such as astringent skin. become. However, while the cutter 18 is rotating, a strong spiral wind is generated within the case 12 by the cutter 18, so the force exerted by this wind on the astringent skin is greater than the adhesion force due to static electricity of the static electricity generation member 23. As a result, the static electricity generating member 2
The adsorption rate of astringent skin to 3 becomes low. On the other hand, the astringent skin peels off from the coffee beans for several seconds after the start of the grinding operation, and during this period, the astringent skin peels off from almost all coffee beans. Then, several seconds after the start of the crushing operation, the contacts d and b of the cam switch 27 of the timer device 26 are opened, and the motor 11 is cut off. Then, since the cutter 18 stops, the wind inside the case 12 is suddenly weakened. When the motor 11 is cut off, the brushes 21 and 22 also stop, but the static electricity generating member 23 continues to be charged with static electricity, so if the wind is suddenly weakened as described above, the astringent skin will be affected by the wind. The static electricity generated by the static electricity generating member 23 attracts it from the intake port 24 toward the upper surface of the static electricity generating member 23 or toward the lower surface of the static electricity generating member 23, where it is attracted and held. Therefore, when the motor 11 is powered off, a large amount of astringent skin is efficiently attracted to the static electricity generating member 23. After the motor 11 is de-energized for a predetermined period of time, the contacts d and b of the cam switch 27 are closed again to energize the motor 11, and the coffee beans are ground even more finely. Thereafter, the opening and closing of contact pieces d and b are repeated several times, and the motor 11 is intermittently cut off, and the astringent skin is efficiently attracted to the static electricity generating member 23 every time the motor 11 is cut off. Coffee beans are gradually ground into fine particles. Then, in the final stage of the grinding operation, the contact pieces d and b are continuously closed, the motor 11 is continuously energized, and the coffee beans are finally ground into coffee powder of a desired particle size. When the elapsed time of the crushing operation as described above reaches a preset time, the contact piece d-b is opened and the motor 11 is de-energized, and then the contact piece d-b is disconnected.
C is closed and the sheathed heater 8 of the hot water generation mechanism 6
is energized. Then, the water supplied from the water storage tank 5 to the heating pipe 9 is heated and hot water is generated.
This hot water rises from the heating pipe 9 to the hot water supply pipe 10 due to boiling pressure, is discharged from the hot water supply pipe 10 onto the hot water diffuser 19, and is discharged from the hot water pouring hole 20 into the case 12.
drip inside. The dropped hot water passes through the coffee powder and the filter 14 and is extracted as coffee liquid, flows out from the extraction port 16 and is stored in the bottle 17.

According to this embodiment, the brushes 21 and 22 and the static electricity generating member 23 are provided in the case 12, and when the motor 11 is energized, the brushes 21 and 22 rub against the static electricity generating member 23 to generate static electricity. In this system, attention is paid to the fact that the astringent skin is peeled off from almost all coffee beans in the initial stage of the grinding operation, and the motor 11 is temporarily cut off by a timer device 26 at a predetermined time during the grinding operation. Therefore, by temporarily stopping the cutter 18 during the crushing operation, case 1 can be solved.
The wind inside 2 is temporarily and rapidly weakened, and during this time, the astringent skin can be adsorbed to the static electricity generating member 23 without being disturbed by the wind, and the recovery rate of the astringent skin can be increased.
This allows you to extract delicious coffee liquid with less bitterness and astringency.

In addition, in the above embodiment, the timer device 2 is activated during the crushing operation.
6, the motor 11 is de-energized several times, so that the astringent skin that was buried in the coffee beans and was not collected when the motor 11 was de-energized the first time, and the astringent skin that has not yet been peeled off from the coffee beans, is transferred to the motor for the second and subsequent times. 11 when the electricity is cut off, the astringent skin can be adsorbed to the static electricity generating member 23, and the recovery rate of astringent skin can be further increased.
However, the present invention does not necessarily require the timer device 26 to cut off the power to the motor 11 several times; for example, the initial objective can be sufficiently achieved even if the motor 11 is cut off only once.

Furthermore, if the motor 11 is provided with an electrical or mechanical braking means for braking the motor 11 when the timer device 26 is opened, the cutter 18 will stop instantly when the motor 11 is cut off. The wind inside can be weakened even more rapidly,
The recovery rate of astringent skin can be further increased. In this case, as an example of the electric braking means, the motor 11
A configuration is conceivable in which the windings of the timer device 26 are short-circuited when the timer device 26 is opened. On the other hand, as an example of mechanical braking means, a brake shoe is provided on the rotor of the motor 11 and a brake plate is provided on the motor frame side, and when the motor 11 is cut off, the brake shoe is pressed against the brake plate, and the motor 11 is A conceivable configuration is that when the brake shoe is energized, the rotor is moved by magnetic thrust to separate the brake shoe from the brake plate.

[Effect of idea]

As is clear from the above description, the present invention is capable of weakening the wind generated by the rotation of the crushing body within the case during crushing operation by temporarily stopping the crushing body, and during this time, the astringent skin is exposed to the wind. It is possible to provide a coffee mill that can efficiently adsorb the static electricity to the static electricity generating member without being disturbed, and has the excellent effect of increasing the collection rate of astringent skin.

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention.
The figure is a vertical front view, Figure 2 is an electric circuit diagram, and Figure 3 is a time cheat diagram. In the drawings, 11 is a motor, 12 is a case, 18 is a cutter (grinding body), 21 and 22 are brushes (friction members), 23 is a static electricity generating member, and 26 is a timer device.

Claims (1)

[Claims for Utility Model Registration] 1. A case in which coffee beans are housed in a case in which a grinder is installed, and the grinder is rotated by a motor to grind the coffee beans. a friction member that rotates together with the grinding body, and a friction member that is provided in the case so as to be in contact with the friction member and rotates to generate static electricity, and this static electricity attracts the astringent skin of the coffee beans. A coffee mill comprising: a generating member; and a timer device for cutting off power to the motor at least once during grinding operation. 2. The coffee mill according to claim 1, wherein the motor has a braking means for braking the motor when power is cut off by a timer device.