JPS6342906Y2 - - 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 is particularly designed to remove 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 households, etc., the whole 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. Therefore, in view of the conventional situation as described above, the present invention has a structure in which the astringent skin and fine powder are conveyed and captured by the air flow generated by the centrifugal fan effect of the rotating cutter itself during coffee bean grinding. The present invention provides a coffee mill that can easily and reliably remove the defective 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 housing a built-in motor 2 for rotationally driving a cutter 4 for crushing coffee beans, which will be described later. A rotatably built-in mill case main body 3 is placed in a detachable manner. Further, the rotation of the motor 2 is transmitted to the cutter 4 by coupling rings 6, 6'. Reference numeral 7 denotes a mill lid that is removably fitted into the upper opening of the mill case body 3 and forms a mill case together with the mill case body 3. Inside the mill lid 7, a space formed by this and the mill case body 3 is used for coffee. A partition plate 8 having flat surfaces on both sides is detachably attached to partition the space A for capturing defective bean components and the cutter installation space B.

A communication hole K for air passage that communicates the space A and the space B is provided in the center of the partition plate 8, and the communication hole K
The space A side periphery of is a first annular wall 14 extending upward.
is provided. Further, the periphery of the communication hole K on the side of the space B extends downward to form a cylinder 9, and faces directly above the cutter 4. Furthermore, a second annular wall 14' extending upward is provided on the outer peripheral edge of the partition plate 8 on the space A side.

Further, on the space B side of the partition plate 8, a plurality of guides 10 are provided which curve from the outer periphery toward the center according to the rotational direction of the cutter 4 shown in C in FIG. A communication hole H for passing defective components of coffee beans, which communicates the space A and the space B, is provided on the outer periphery. Further, in this communication hole H, a shielding guide 11 is bent downward and guides an air flow, which will be described later, from the space B to the space A in a direction opposite to the direction of rotation of the cutter 4.

Further, numeral 5 denotes a blade wheel formed by bending downward in a part of the cutter 4, and effectively creates an air flow upward in the rotation time space B of the cutter 4.

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 body 3 and setting each part as shown in FIG. Ru.
When grinding begins, the astringent skin of the coffee beans shown in Figure 4 1
2 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 in the grinding process rotate in the space B in the same direction as the rotational direction C of the cutter 4 while colliding with the guide 10.

However, when the extremely light astringent skin 12 and the defective components such as fine fruit powder reach the terminal end E of the guide 10, they change direction due to the air flow flowing from the space B to the space A through the communication hole H in the periphery. and is carried into space A. The airflow flowing into the space A returns to the space B through the communication hole K in the center of the partition plate 8, forming a circulating flow, but the airflow after passing through the communication hole H in the periphery is decelerated. and the first annular wall 14 on the periphery of the communication hole K in the center and the second annular wall 14 on the outer periphery of the partition plate 8.
Due to the annular wall 14', defective components such as astringent skin are removed from the communication hole K and the gap between the partition plate 8 and the mill lid 7 in the space B.
In other words, defective components can be continuously separated and captured in space A while grinding coffee beans during operation.

Furthermore, even when the large particulate coffee powder required for extracting the coffee liquid reaches the terminal end E of the guide 10, it continues to move in the same direction as the rotation of the cutter 4 due to its inertia, and is moved in the space by the air flow. It is not carried into A and is accumulated at the bottom of space B.

After grinding the coffee beans as described above,
The mill lid 7 is removed from the mill case body 3 and the particulate coffee powder inside the mill case body 3 is taken out and used. On the other hand, defective ingredients such as astringent skin and fine powder captured in the space B are removed from the mill lid 7 by the partition plate 8. Just remove it, clean it and dispose of it. At this time, the first and second annular walls 14, 14' are provided only on the side surface of the space A of the partition plate 8, and the side surface of the space B is flat, making it easy to clean and dispose of.

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, it is possible to improve the taste of the coffee, and in particular, there is no need for the difficult and troublesome work of removing defective components from the coffee powder after grinding. is 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 space B, so that the centrifugal fan effect of the impeller 5 can be greatly enhanced. can. Also, partition plate 8
Since a shielding guide 11 is provided below the peripheral communication hole H, the coffee particles that are blown away by the cutter 4 and the impeller 5 after the start of coffee bean grinding may not directly jump into the space A. Therefore, the air flow from the space B to the space A through the communication hole H can be made smooth, and defective components can be efficiently captured. Furthermore, since the coffee beans in the space 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, and in short, a space is provided in the mill case that is separated from the cutter installation space by a partition wall, and the partition wall is
A communication hole for passage of defective coffee beans and a communication hole for air passage are provided to communicate the cutter installation space and the partition space, and an annular wall is provided on the outer periphery of the partition plate and the periphery of the communication hole for air passage, respectively. Any configuration is sufficient as long as the cutter does not include a blade wheel, and the cutter itself uses a centrifugal fan effect to send the defective components to the partitioned space and separate and capture them.

As explained above, the present invention divides the inside of the mill case into a cutter installation space and a space for capturing defective coffee bean components by a partition wall, and also provides a space for the cutter installation space and a space for capturing defective coffee bean components in the partition wall. By providing a communication hole for the passage of defective components of coffee beans and a communication hole for the passage of air, which communicate with the coffee bean space, defective components of coffee beans can be separated during coffee bean grinding, and thus the coffee powder after grinding is The difficult and troublesome work of removing defective components from the inside becomes unnecessary.

Also, according to this invention, annular walls are provided on the outer periphery of the partition wall on the side of the space for capturing defective components of coffee beans and on the periphery of the communication hole for air passage, so that air passage is prevented during separation of defective components of coffee beans, etc. The defective components rarely return to the cutter installation space (the space where defective coffee bean components accumulate) through the communication hole or the gap between the mill case and the partition wall, thus removing the defective components from the ground coffee powder. It is possible to obtain extremely delicious coffee while eliminating the need for such difficult and troublesome work.

[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 the 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, 14, 14'... Annular wall,
A...Space for capturing defective components of coffee beans, B...Cutter installation space, H...Communication hole for passing defective components of coffee beans, K...Communication hole for air passage. Note that the same reference numerals in the figures indicate the same parts.

Claims (1)

[Claims for Utility Model Registration] (1) In a coffee mill in which a rotatably driven cutter for grinding coffee beans is installed in a mill case, the inside of the mill case is separated by a partition wall to separate the cutter installation space and coffee bean defects. and a space for capturing components, and the partition wall is provided with a communication hole for passage of defective components of coffee beans and a communication hole for passage of air, which communicate the space for installing the cutter and the space for capturing defective components of coffee beans, and A coffee mill characterized in that an annular wall is provided on the outer periphery of the partition wall on the side of the space for capturing defective components of coffee beans and on the periphery of the communication hole for air passage. (2) Registration of a utility model characterized in that a communication hole for passing defective components of coffee beans is provided at the periphery of the partition wall, and a communication hole for air passage is provided approximately at the center of the partition wall. A coffee mill according to claim 1. (3) Utility model registration claim 1 characterized in that the cutter installation space side of the partition wall is a flat surface.
The coffee mill according to item 1 or 2.