JPH0111158Y2 - - 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 further improve the taste, it is necessary to use freshly ground coffee powder. It is essential to remove unnecessary and defective ingredients for good taste.

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 in so-called specialty shops, this astringent skin and fine powder are removed. Some places even extract coffee liquid.

However, in conventional coffee mills used in households, etc., 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 has been developed by attaching and detaching guide walls from the outer periphery to the inside in accordance with the rotational direction of the cutter at multiple locations in the circumferential direction inside the mill lid, respectively, along the cutter rotation axis. At the same time, on the back side of these guide walls, a scrap tray with a shelf section outside the inner end of the guide wall is integrally installed, and the shelf section of this scrap tray is designed to prevent air flow generated by the rotation of the cutter. Therefore, by configuring the coffee mill to selectively collect the defective components of coffee beans, it is possible to provide a coffee mill that can easily and reliably remove the defective components.

An embodiment of the present invention will be described below with reference to 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 this motor case 1. A cylindrical mill case 3 with a bottom is detachably connected thereto, and the rotation of the motor 2 is transmitted to the cutter 4 through coupling rings 5 and 5'. Reference numeral 6 denotes a bottomed cylindrical mill lid that is removably fitted into the opening of the mill case 3 to form a two-piece sealed container together with the mill case 3, and a coffee bean grinding space S formed in the sealed container. In the mill lid 6 portion, guide walls 7 extending inward from the outer periphery are removably erected at a plurality of locations in the circumferential direction along the cutter rotation axis, respectively, corresponding to the rotation direction C of the cutter 4. At the same time, a waste receptacle 9 having a shelf part 8 outside the inner end E of the guide wall 7 is integrally provided on the back side of the guide wall 7. The air flow generated by the rotation of the cutter 4 can selectively collect defective components of the coffee beans.

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.
Coffee beans are ground by the cutter 4.

When grinding begins, the astringent skin 10 and the fruit 11 of the coffee beans shown in FIG. 4 separate, and both become finer over time. As the cutter 4 rotates, the coffee beans in the grinding process are transferred to the guide wall 7 of the waste receptacle 9.
The cutter rotates in the mill case 3 in the same direction as the rotation direction of the cutter 4, as shown in FIG.

Here, since the guide wall 7 is interrupted from the terminal end E, the air flow that has flowed smoothly along the guide wall 7 becomes turbulent after passing the terminal end E, as shown by the arrow P in FIG. A vortex is formed on the back side of the guide wall 7, and a so-called stagnation part is formed. Therefore, defective components such as the astringent skin 10 and fine powder of the fruit 11, which are extremely light in weight, move along the guide wall 7, and when they reach the terminal end E, they are caught in the turbulent air flow, and the guide wall 7, which is the stagnation part, moves along the guide wall 7. The particles are deposited on the shelf 8 formed on the outside of the container.

Even when the large particulate coffee powder required for extracting the coffee liquid reaches the terminal end E of the guide wall 7, due to its inertia, it does not get caught up in the turbulence, as shown by the arrow Q in FIG. 3. Continue to rotate the cutter 4 and move in the same direction.

After an appropriate amount of time has elapsed as described above, the power to the motor 2 is stopped and the rotation of the cutter 4 is stopped.
The astringent skin and fine powder, which are bad components that accumulate at the inner bottom, are collected on the shelf 8 of the waste receptacle 9 in a state where they are separated from the good components.

After the coffee beans are ground in this way, the mill lid 6 is removed from the mill case 3 and the particulate coffee powder inside the mill case 3 is taken out and used. Defective components such as fine powder can be disposed of by removing the waste receptacle 9 from inside the mill lid 6.

As described above, according to the present invention, a sealed container with a two-piece structure is formed by a cylindrical mill case with a bottom and a cylindrical mill lid with a bottom that is detachably fitted into the opening of the mill case. In a coffee mill in which a coffee bean grinding cutter driven by a motor is installed at the bottom of the mill lid, the mill lid is provided at multiple locations in the circumferential direction from the outer periphery to the inside, respectively, corresponding to the rotational direction of the cutter. Guide walls are installed and removably erected along the axis of cutter rotation, and a scrap receiver having a shelf outside the inner end of the guide wall is integrally provided on the back side of these guide walls. Since the shelf of the receiver is configured to selectively collect defective components of the coffee beans by the airflow generated by the rotation of the cutter, only the defective components that are unnecessary for the deliciousness of the coffee can be easily removed. This makes it possible to improve the taste of coffee, and eliminates the troublesome and difficult work of removing defective components from the ground coffee powder, which was previously done. is very large.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the coffee mill according to the present invention, Fig. 2 is an exploded perspective view of essential parts of the same coffee mill, Fig. 3 is a plan view of the waste receptacle in the above coffee mill, and Fig. 4 is a view of the coffee beans. It is a cross-sectional schematic diagram showing the structure. 2... Motor, 3... Mill case, 4... Cutter, 6... Mill lid, 7... Guide wall, 8...
Shelf section, 9...Scrap receiver, E...Terminal section.

Claims (1)

[Scope of utility model registration request] A cylindrical mill case with a bottom and a cylindrical mill lid with a bottom that removably fits into the opening of the mill case form a sealed container with a two-piece structure, and a motor is attached to the bottom of the sealed container to drive the mill lid. In a coffee mill in which a cutter for grinding coffee beans is installed, guide walls extending from the outer periphery toward the inside are arranged at a plurality of locations in the circumferential direction inside the mill lid, each extending from the outer periphery to the inside in accordance with the rotational direction of the cutter. At the same time, on the back side of these guide walls, a waste receptacle having a shelf portion outside the inner end of the guide wall is integrally provided, and the scrap receptacle is attached to the shelf portion of the waste receptacle by rotation of the cutter. A coffee mill characterized in that it is configured to selectively collect defective components of coffee beans using a generated air flow.