JPS6360667B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coffee mill that grinds coffee beans placed in a mill case using a rotatably driven cutter, and particularly to a coffee mill that removes defective components from coffee beans while grinding the coffee beans. Regarding.

It is generally accepted that using freshly ground coffee powder is necessary to extract delicious coffee, but in order to improve the taste, it is necessary to use freshly ground coffee powder to extract delicious coffee. It is essential for Sato to remove unnecessary and defective components.

In particular, the astringent skin called silver skin, which is a component of coffee beans, and the fine powder produced by grinding impair the original taste of coffee, so so-called specialty shops remove this astringent skin and fine powder. Some places even extract coffee liquid.

However, in conventional coffee mills used in households, the entire coffee bean is ground at once, so the astringent skin and fine powder are uniformly mixed into the ground coffee powder.
Separation after crushing was extremely difficult and troublesome.

In view of the above-mentioned conventional circumstances, the present invention aims to transport astringent skins and fine powder to a partitioned space in a mill case using an air flow generated by the centrifugal fan effect of the rotating cutter itself during coffee bean grinding. This configuration allows the removal of the defective components to be easily and reliably removed, and allows for the removal of any amount of the defective components to be easily used by those who prefer coffee powder containing astringent skin and fine powder. This provides a coffee grinder that can be adjusted to

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 4.

In Figures 1 to 3, reference numeral 1 denotes a motor case with a built-in motor 2 for rotationally driving a cutter for grinding coffee beans, which will be described later.A cutter 4 for grinding coffee beans is mounted on the motor case 1. A mill case 3 is removably placed thereon, and the rotation of the motor 2 is transmitted to the cutter 4 through coupling rings 6 and 6'. 7
is a mill lid that is removably fitted to the mill case 3, and a partition plate 8 is removably attached inside the mill lid 7 to partition the space formed by this and the mill case 3 into a chamber A and a chamber B. ing.
A central communication hole 17 is provided in the center of the partition plate 8 to communicate chamber A and chamber B.
The side peripheral edge is provided with an annular wall 14 that projects upward. Further, the periphery of the communication hole 17 on the chamber B side extends downward to form a cylinder 9, which faces directly above the cutter 4.

On the chamber B side of the partition plate 8, there is a cutter 4 C in Fig. 2.
A guide 10 is provided that curves from the outer periphery toward the center in accordance with the rotational direction shown in FIG. Furthermore, this communication hole 1
A shielding guide 11 is bent downward at 8 to guide an air flow, which will be described later, from chamber B to chamber A in a direction opposite to the direction of rotation of cutter 4. On the upper side of the partition plate 8, an adjustment plate 15 is connected to the annular wall 14 of the partition plate 8.
and the center hole 19 of the adjustment plate 15, and are rotatably fitted. A notch 20 is provided on the outer periphery of the adjustment plate 15 at a position corresponding to the peripheral communication hole 18 of the partition plate 8. By rotating the adjustment knob 15 with a knob 16, the partition plate 8 can be adjusted. The opening area of the peripheral communication hole 18 can be adjusted as desired.

On the other hand, reference numeral 5 denotes a blade wheel formed by bending downward in a part of the cutter 4, which effectively creates an air flow upward in the chamber B when the cutter 4 rotates.

Next, the coffee bean grinding process and defective component removal process of the coffee mill with the above configuration will be explained.

First, put the coffee beans into the mill case 3,
After each part is set as shown in FIG. 1, the motor 2 is energized and the cutter 4 is rotated at high speed, and the coffee beans are ground by the cutter 4. When grinding begins, the astringent skin 12 and the fruit 13 of the coffee beans shown in FIG. 4 separate, and both become thinner as time passes.

Airflows created by the centrifugal fan effect of the impeller 5 as the cutter 4 rotates occur as shown by arrows P and Q in the figure.

That is, the coffee beans during the grinding process rotate in the chamber B in the same direction as the rotational direction C of the cutter 4 while colliding with the guide 10.

When the defective components such as the extremely light astringent skin 12 and fine powder of the fruit 13 reach the end E of the guide 10,
The airflow flowing from chamber B to chamber A through the peripheral communication hole 18 redirects and carries the air into chamber A. The airflow flowing into the chamber A returns to the chamber B through the central communication hole 17 of the partition plate 8, forming a circulating flow, but the airflow after communicating through the peripheral communication hole 18 is decelerated and Due to the annular wall 14 at the periphery of the communication hole 17, defective components such as astringent skin 12 are accumulated in chamber A without returning to chamber B, so that defective components are continuously removed during operation, that is, while grinding coffee beans. It can be separated and captured in room A.

Even when the large particulate coffee powder required for extracting the coffee liquid reaches the end E of the guide 10, its inertia causes it to continue moving in the same direction as the rotation of the cutter 4, and is carried into the chamber A by the air flow. It is deposited at the bottom of chamber B without being washed away.

After grinding the coffee beans as described above,
The mill lid 7 is removed from the mill case 3 and the particulate coffee powder inside the mill case 3 is taken out and used, while the defective components such as astringent skin and fine powder captured in the chamber B are removed by removing the partition plate 8 from inside the mill lid 7. Just dispose of it.

In addition, by changing the opening area of the peripheral communication hole 18 of the partition plate 8 using the adjustment plate 15, the flow rates of the air flows P and Q created in the mill case 3 can be arbitrarily adjusted. The amount of astringent skin and fine powder carried into chamber A by the air flow can be changed arbitrarily. That is, the removal amount of astringent skin and fine powder, which are generally considered better to be removed, can be easily adjusted depending on the taste of the drinker, and since the structure is simple, the cost is low and cleaning is good.

According to the above configuration, when coffee beans are ground, the astringent skin and fine powder of the coffee beans can be efficiently separated and captured by the airflow generated by the rotation of the cutter 4 by carrying the desired amount into the chamber A serving as the partitioned space. Since it is possible to arbitrarily remove defective components that are unnecessary for the deliciousness of coffee, the deliciousness of coffee can be further improved. It does not require any additional work and is very convenient.

According to this embodiment, the central communication hole 17 is connected to the chamber B.
On the other hand, since it is configured to open directly above the cutter 4 through the cylinder 9, the centrifugal fan effect of the impeller 5 can be greatly enhanced. In addition, since the shielding guide 11 is provided below the peripheral communication hole 18 of the partition plate 8, immediately after the start of coffee bean grinding,
The coffee particles splashed by the cutter 4 and the impeller 5 do not directly fly into the chamber A, and the air flow from the chamber B to the chamber A through the communication hole 18 is made smooth. This allows for efficient capture of defective components. Furthermore, since the coffee beans in the chamber B are stirred by the guide 10 from the outside toward the center, there is also the effect that the coffee beans are ground uniformly.

The embodiments clarified by the above explanation are as follows:
This does not indicate any structural limitations of the present invention, but in short, the present invention provides a space in the mill case that is separated from the cutter installation space by a partition wall, and at the same time, the cutter installation space and the cutter installation space are separated from each other by a partition wall. It is sufficient that a communication hole is provided to communicate with the partition space, and the opening area of either one of the communication holes, that is, from the peripheral communication hole to the central communication hole, can be adjusted at least, and the cutter is also provided with an impeller. First, any structure may be used as long as the defective components are sent to the partitioned space and separated and captured by the centrifugal fan effect of the cutter itself.

As explained above, the present invention provides a space in the coffee mill that is separated from the cutter installation space,
Due to the centrifugal fan effect of the cutter that rotates during coffee bean grinding, defective components such as astringent skin and fine powder in the coffee beans are sent into this space and separated and captured, so that the defective components can be easily and reliably removed. Moreover, it is possible to provide a coffee mill capable of obtaining coffee powder from which such defective components are removed in an amount according to one's preference.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing the structure of the coffee mill according to the present invention, Fig. 2 is an exploded perspective view of the same coffee mill, Fig. 3 is a plan view of a partition plate in the above coffee mill, and Fig. 4 is It is a cross-sectional diagram of coffee beans. 3... Mill case, 4... Cutter, 7... Mill lid, 8... Partition plate, 15... Adjustment plate, A...
Room (partition space), B...room (cutter installation space),
17, 18...Communication hole, 20...Notch.

Claims (1)

[Claims] 1. In a mill case in which a rotationally driven cutter for grinding coffee beans is installed, a space is provided that is separated from the cutter installation space by a partition wall, and
In the coffee mill, a communication hole is provided in a separated part of the partition wall to communicate the partition space and the cutter installation space, and the partition space is a space where defective components of coffee beans are captured when coffee beans are ground. A coffee mill characterized by adjustable hole opening area.