JPS6359691B2 - - 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 in particular removes unnecessary defective components from coffee beans during grinding of the coffee beans. Regarding coffee mills.

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 general households, the whole coffee bean is ground at once, so the astringent skin and fine powder are uniformly mixed into the ground coffee powder, and after grinding, Separation was extremely difficult and troublesome. In view of the above-mentioned conventional circumstances, the present invention has been developed to convey astringent skin 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. The object of the present invention is to provide a coffee mill that can easily and reliably remove the defective components by capturing the components.

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

In Figures 1 to 3, 1 is a motor case with a built-in motor 2 for rotationally driving a cutter for grinding coffee beans, which will be described later. The attached mill case 3 is placed thereon in a detachable manner, and the rotation of the motor 2 is transmitted to the cutter 4 through couplings 6 and 6'. Reference numeral 7 denotes a mill lid that is removably fitted to the mill case 3, and a partition plate 8 that partitions the space formed by this and the mill case 3 into a chamber A and a chamber B is detachably attached to the inside of the mill lid 7. It is being A central communication hole K is provided in the center of the partition plate 8 to communicate chambers A and B, and the periphery of the communication hole K on the chamber A side projects upward and is provided with 14 annular walls. . Further, the periphery of the communication hole K on the side of the chamber B is bent downward to form a cylinder 9, and the cutter 4
It is facing directly above.

On the chamber B side of the partition plate 8, there are provided 10 guides that curve from the outer circumference toward the center according to the rotational direction of the cutter 4 shown in FIG. A peripheral communication hole H communicating with B is provided. Further, in this communication hole H, a shielding guide 11 is provided which guides the air flow described later from chamber B to A in the opposite direction to the rotational direction of the cutter 4.
is bent downward.

On the other hand, reference numeral 5 denotes a blade wheel bent downwardly on a part of the cutter 4 to effectively create 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 having the above configuration will be explained.

First, after placing coffee beans in the mill case 3 and setting each part 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 of the coffee beans shown in Figure 4
and fruit 13 separate, and both become thinner as time passes.

The airflow created by the centrifugal fan effect of the impeller 5 as the cutter 4 rotates occurs 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 extremely light astringent skin and fine powder of the fruit reach the end E of the guide 10, the direction is changed by the airflow flowing from chamber B to A through the peripheral communication hole H, and the defective components are carried into chamber A. It will be done. The airflow flowing into the chamber A passes through the central communication hole K of the partition plate 8 and returns to the chamber B, forming a circulating flow, but the airflow after passing through the peripheral communication hole H is decelerated, and the airflow returns to the chamber B through the central communication hole K of the partition plate 8. Due to the annular wall 14 around the hole K, defective components such as astringent skin do not return to chamber B and accumulate in chamber A. Therefore, defective components are continuously separated into chamber A during operation, that is, while grinding coffee beans. Can be captured.

Even when the large particulate coffee powder required for extraction of coffee liquid reaches the end E of the guide 10, its inertia continues to move in the same direction as the rotation of the cutter 4, and it is carried into the chamber A by the air flow. Without a doubt, it will be deposited at the bottom of chamber 1B3.

After grinding the coffee beans as described above, the mill lid 7 is removed from the mill case 3 and the particulate coffee powder in the mill case 3 is taken out and used. The components can be disposed of by removing the partition plate 8 from inside the mill lid 7.

According to the above configuration, the astringent skin and fine powder of the coffee beans can be efficiently separated and captured by the air flow generated by the rotation of the cutter 4 when the coffee beans are ground into the partitioned space A, which improves the deliciousness of the coffee. Since it is possible to remove unnecessary defective components, the taste of coffee can be further improved, and in particular, the difficult and troublesome work of removing defective components from the ground coffee powder is unnecessary, and it is easy to use. It's big.

According to this embodiment, the central communication hole K is configured to open directly above the cutter 4 through the cylinder 9 with respect to the chamber B, so that the centrifugal fan effect of the impeller 5 can be greatly enhanced. In addition, since a shielding guide 11 is provided below the peripheral communication hole H of the partition plate 8, the coffee particles blown away by the cutter 4 and the impeller 5 directly flow into the chamber A immediately after the start of coffee bean grinding. The air flow from chamber B to chamber A through the communication hole H can be made smooth without flying into the air, and defective components can be efficiently captured. 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 description do not indicate any structural limitations of the present invention. 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 It is sufficient to have a communication hole in two separate parts of the partition wall to communicate the cutter installation space and the partition space, and the cutter does not have an impeller either, and the centrifugal fan effect of the cutter itself prevents defects in the partition space. Any configuration is sufficient as long as the components are sent and separated and captured.

As explained above, the present invention provides a space in the coffee mill that is separated from the cutter installation space, and uses the centrifugal fan effect of the cutter that rotates when grinding coffee beans to remove the astringent skin and fine particles in the coffee beans. Since defective components such as powder are sent and separated and captured, the defective components can be easily and reliably removed, and a more delicious coffee liquid can be obtained from the coffee powder from which such defective components have been removed. In particular, according to the present invention, since the partition wall that partitions the space for capturing defective components is provided with a communication hole between the space and the cutter installation space, it can be constructed by simply installing the partition wall inside the mill case, and it can be configured by simply installing the partition wall inside the mill case. This has the advantage of an extremely simple structure, such as not requiring the installation of a case for capturing defective components.
Further, by providing the communication holes in two separated parts of the partition wall, there are advantages that the airflow caused by the cutter can be efficiently circulated between the two spaces and that defective components can be captured efficiently.

[Brief explanation of drawings]

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, A... Chamber (partition space),
B...Chamber (cutter installation space), H, K...Communication holes.

Claims (1)

[Claims] 1. In a coffee mill in which a rotationally driven cutter for grinding coffee beans is installed in a mill case, a space is provided in the mill case that is partitioned from the cutter installation space by a partition wall, and the space between the partition walls is A coffee mill characterized in that communication holes are provided in two parts of the coffee mill to communicate the partition space and the cutter installation space, and the partition space is a space in which defective components of coffee beans are captured during grinding of coffee beans.