WO2007135728A1

WO2007135728A1 - Rotary blade for coffee mill and coffee mill provided with the same

Info

Publication number: WO2007135728A1
Application number: PCT/JP2006/310166
Authority: WO
Inventors: Takao Suzuki
Original assignee: Devicestyle Holdings Corporation
Priority date: 2006-05-22
Filing date: 2006-05-22
Publication date: 2007-11-29

Abstract

A coarsely ground coffee powder is obtained at a high efficiency. A rotary blade (16) for a coffee mill which is to be employed in a coffee mill for milling coffee beans to give a coffee powder and separating the milled powder into a fine fraction and a coarse fraction in the course of the milling. Namely, a rotary blade (16) for a coffee mill having a first extending part (16a), which is attached almost horizontally to the rotational axis of the rotary blade (16) and has a function of scooping up coffee beans, and a second extending part (16b), which is attached to the rotational axis of the rotary blade (16) and has a function of milling the coffee beans rolled upward, and a coffee mill provided with the rotary blade.

Description

Specification

Rotating blade for coffee mill and coffee mill equipped with the same

Technical field

[0001] The present invention relates to a coffee mill rotary blade mounted on a coffee mill for crushing coffee beans into powder and separating the pulverized powder finely and coarsely while pulverizing. And a coffee mill equipped with the same.

Background art

[0002] To make a coffee drink at home or in a coffee shop, put coffee powder that has been roasted coffee beans in advance on a filter, and then pour hot water over it to extract the coffee.

Alternatively, a coffee maker equipped with an electric mill may use a method in which roasted coffee beans are put into a mill and ground into a powder!

[0003] If the coffee beans are ground too much, the bitterness of the coffee will increase, which will be unfavorable for general coffee lovers. On the other hand, if the degree of grinding of the coffee beans is too rough, caffeine and sweet ingredients cannot be sufficiently extracted from the coffee, and the taste of the coffee is lost. The taste of coffee also depends on the extraction time. If the extraction time is too long, the bitterness of the coffee will increase. On the other hand, if the extraction time is too short, coffee without umami is produced. In practice, the power of coffee taste depends on the combination of the degree of coffee powder pulverization and the extraction time. Generally, 4 to 5 minutes is an appropriate time for coffee extraction.

[0004] A coffee maker with an electric mill that is commercially available! When coffee beans are ground using a hand-milled mill, coffee powder with an extremely wide particle size distribution can be obtained. For example, in the case of a coffee maker with an electric mill, horizontal rotating blades rotate in a dense coffee bean. This makes coffee beans a coffee powder with a fairly wide particle size distribution. In the case of hand-milled mills, coffee beans are generally crushed by crushing in the gap between the screw and the outer screw receiver. In this case, it is somewhat better than the coffee maker with the electric mill described above, but the coffee beans are still fairly wide and crushed into coffee powder with a grain size distribution. However, using the above mill, coffee beans Although it is possible to grind more than necessary, such a method is not preferable because coffee powder composed of small powder is produced.

[0005] In such a current situation, in order to suppress the bitterness of coffee as much as possible and extract a large amount of umami components, an invention relating to a method and apparatus for producing a coffee beverage that focuses on crushing coffee beans is also provided. (See Patent Document 1) o In the production method and apparatus, coffee beans roasted in or together with a liquid are pulverized to an appropriate particle size, and the pulverized coffee beans are used with the liquid. I try to extract. As a result, it is possible to prevent the flavor components contained in the roasted coffee beans from being released into the air without excessively eluting the astringency and the oil content.

Patent Document 1: JP 2000-333612 A (for example, paragraph number 0002 to paragraph number 000 8)

Disclosure of the invention

Problems to be solved by the invention

[0006] However, the above-described conventional technology has the following problems. Compared to the production of industrial coffee beverages, the amount of coffee beverages made at home or in a coffee shop is small. For this reason, it is difficult to employ a method of pulverizing roasted coffee beans in a liquid. Since a small amount of coffee beans are crushed, the use of liquid will cause the coffee powder to harden in the mill, making it almost impossible to grind. However, there is a problem that the cost of the coffee beverage production apparatus increases when a system for supplying the liquid into the mill by adjusting the liquid supply amount is introduced. In particular, a cost-effective system cannot be adopted in a home-use coffee beverage production apparatus.

[0007] In consideration of such a situation, the present inventor has started research for obtaining a coarse coffee powder by pulverizing and classifying coffee beans in a dry process. If a mesh is placed outside the grinding area of a normal electric mill and a sealed container is placed outside of it, only fine powder smaller than the mesh hole will pass through the cache. However, powder that is coarser than the fine powder cannot pass through the mesh and accumulates inside the mesh. By determining the size of the mesh holes and using only the coarse coffee powder stored inside the mesh, it was clear that it was possible to produce coffee that had good taste and little bitterness. [0008] However, when the pulverized coffee powder is separated into fine and coarse, it is not possible to efficiently obtain the coarse coffee powder unless creativity is applied to the classification method. I was strong.

[0009] The present invention has also been provided with the above-mentioned weft force, and an object thereof is to efficiently obtain coarse coffee powder.

Means for solving the problem

[0010] In order to achieve the above object, the present invention is equipped with a coffee mill for pulverizing coffee beans into powder and separating the pulverized powder finely and coarsely while being pulverized. In the coffee mill rotary blade, a first extension portion that is attached substantially horizontally to the rotary shaft of the rotary blade and has a function of scooping up the coffee beans to the lower force, and a rotating portion. The rotary blade for a coffee mill is provided with a second extension portion that is attached to the rotary shaft of the blade and has a function of pulverizing coffee beans that are rolled up with a lower force. For this reason, the coffee beans can be scooped up by the first extension part, and the scooped coffee beans can be crushed by the second extension part. Thus, overgrinding can be prevented by giving the above two independent functions to the coffee mill rotary blade. When the coffee beans lifted into the space are beaten by the second extension, the pressure applied to the entire coffee beans is small, so it can be crushed roughly. Also, when the coffee mill rotary blade is covered with an inner cup with a perforated area, the coffee beans are collected and the coffee mill rotary blade is rotated, the coffee beans are crushed and only finely ground. Can be efficiently put out of the inner cup.

[0011] In addition, in another aspect of the present invention, in the above rotary blade for a coffee mill, the first extending portion includes an inclined portion having an inclined surface at a location other than the extending direction, and the second extending portion. The rotating part for a coffee mill is provided with a standing part that is bent at the protruding part on the same side as the inclined part.

[0012] According to another aspect of the present invention, in the above rotary blade for a coffee mill, the first extending portion includes a horizontal portion extending in a substantially horizontal direction from the rotating shaft, and the extending direction from the horizontal portion. An inclined portion bent so as to have an inclined surface at a place other than the horizontal portion, a horizontal portion extending in a substantially horizontal direction from the rotating shaft, and an extension from the horizontal portion at the second extending portion. Where the direction is As a coffee mill rotary blade equipped with an upright part bent on the same side as the inclined part! Therefore, the coffee beans below are scooped up by the inclined portion, and the coffee beans can be crushed mainly by the standing portion. When the rotary blade for a coffee mill having such a structure is adopted, the inclined portion mainly serves to scoop up the coffee beans by collecting the coffee beans and rotating the rotary blade for the coffee mill in the coffee beans. Mainly plays the role of crushing coffee beans. Therefore, the coffee beans can be easily and effectively prevented from being excessively pulverized only by folding the extending portion of the rotary portion for the coffee mill. Cover the outside of the coffee mill rotary blade with an inner cup with a perforated area, collect the coffee beans, and rotate the coffee mill rotary blade in it. It can be efficiently put out of the inner cup.

[0013] Further, according to another aspect of the present invention, in each of the above rotary blades for a coffee mill, the first extending portion and the second extending portion extend in directions opposite to each other with respect to the rotation axis. It is a rotary blade for mills. For this reason, the balance of rotation of the rotary blade for a coffee mill is improved. The coffee beans can be scooped and ground at the same frequency.

[0014] Further, the present invention is a coffee mill for pulverizing coffee beans into powder and separating the pulverized powder into fine and coarse powders while pulverizing the coffee beans, the rotary shaft of the rotary blade It is an extension part that is attached almost horizontally, the first extension part that has the function of scooping up coffee beans from the bottom, and the extension part that is attached to the rotary shaft of the rotary blade. A coffee mill rotary blade having a second extending portion having a function of pulverizing coffee beans, a rotary drive device for driving the rotary shaft to rotate, and a perforated region for rotation for a coffee mill The coffee mill includes an inner cup that covers an area in which the blade rotates, and an outer cup that is disposed outside the inner cup and spaced from the inner cup. For this reason, the coffee beans can be scooped up by the first extending portion, and the scooped coffee beans can be crushed by the second extending portion. Thus, overgrinding can be prevented by providing the above two independent functions to the coffee mill rotary blade. In addition, when coffee beans are put in the inner cup and the rotary blade for the coffee mill is rotated in the coffee cup, only the fine beans can be efficiently taken out of the inner cup while the coffee beans are being crushed. [0015] In another aspect of the present invention, in the previous coffee mill, the first extending portion includes an inclined portion having an inclined surface at a location other than the extending direction, and the second extending portion includes The coffee mill is provided with a standing portion in which a portion in the extending direction is bent on the same side as the inclined portion.

[0016] Another aspect of the present invention is that, in the previous coffee mill, the first extending portion includes a horizontal portion extending in a substantially horizontal direction from the rotation shaft, and a portion other than the extending direction from the horizontal portion. The second extending portion includes a horizontal portion extending substantially horizontally from the rotating shaft and a portion extending in the extending direction from the horizontal portion. The coffee mill has an upright portion bent on the same side as the inclined portion. For this reason, the coffee beans below are scooped up by the inclined portion, and the coffee beans can be crushed mainly by the standing portion. When a coffee mill with such a structure is adopted, the inclined part mainly serves to scoop up coffee beans by putting the coffee beans in the inner cup and rotating the coffee mill rotary blade in it. The standing part mainly plays the role of crushing coffee beans. Therefore, it is possible to easily and effectively prevent coffee beans from being excessively pulverized only by folding the extending portion of the rotary portion for the coffee mill. Cover the outer side of the coffee mill rotary blade with an inner cup with a perforated area, and then rotate the coffee mill rotary blade inside the coffee bean. Can be put out of the inner cup efficiently.

In another aspect of the present invention, in each of the above coffee mills, the first extension portion and the second extension portion are coffee mills extending in directions opposite to each other with respect to the rotation axis. For this reason, the balance of rotation of the cohering mill rotary blade is improved. The coffee beans can be scooped and ground at the same frequency.

[0018] Another aspect of the present invention is that each of the previous coffee mills includes a recess for storing the coarse coffee powder after separation, below the rotary blade for the coffee mill, and an extension line of the peripheral edge of the recess. The coffee mill is a perforated region with a contact point with the inner cup arranged outside the recess. For this reason, coffee powder (coarse) larger than the holes in the perforated region accumulates in the recesses, and coffee powder (fine) smaller than the pores in the perforated region efficiently passes through the mesh. Therefore, fine and coarse can be separated efficiently.

Brief Description of Drawings FIG. 1 is a perspective view of a coffee mill according to an embodiment of the present invention.

FIG. 2 is a side view of the coffee mill shown in FIG.

FIG. 3 is a partial cross-sectional view of the coffee mill shown in FIG. 1 disassembled for each main part.

FIG. 4 is a perspective view of a rotary blade for a coffee mill according to an embodiment of the present invention.

FIG. 5 is a plan view of the coffee mill rotary blade shown in FIG. 4.

FIG. 6 is a side view of the coffee mill rotary blade shown in FIG.

[Fig. 7] Fig. 7 is a diagram showing a state where the coffee mill rotary blade shown in Fig. 4 scoops up the coffee beans in the coffee mill shown in Fig. 1.

[FIG. 8] FIG. 8 is a diagram showing a situation in which the scooped coffee beans are crushed following the situation shown in FIG.

FIG. 9 is an enlarged view of the perforated region provided on the side surface of the metal cup shown in FIG.

FIG. 10 is a partial cross-sectional view showing the coffee mill shown in FIG. 1 with a metal cup placed above the rotary blade mounting portion and the upper force also fixing the transparent cup. It is a figure for demonstrating the condition which isolate | separates it into fine and coarse while crushing coffee beans.

FIG. 11 is a perspective view showing a modified example (modified example 1) of a rotary blade for a coffee mill.

FIG. 12 is a perspective view showing another modified example (modified example 2) of the rotary blade for a coffee mill.

FIG. 13 is a perspective view showing another modified example (modified example 3) of the rotary blade for a coffee mill.

1 = 3—Hi mill

2 Body

3 Transparent cup (outer cup)

4 Metal cup (inner cup)

5 Perforated area

6 Power cord Rotary blade mounting part

Unevenness

O ring

Saucer

Recess

Axis of rotation

Coffee mill rotary blade (rotary blade) a First extension (one of the extension) b Second extension (one of the extension) Fixing member

Joint

Convex

Fixed member

Motor built-in part

Recessed area

Recess

Groove

Wall

Motor (rotary drive) shaft

Fixed member

Recess

Horizontal part

Fold line

Slope

Fold line

Bent part

Horizontal part 51 Folding line

52 Standing part

53 Folding line

54 Folding part

60 coffee beans

60a, 60b, 60c coffee beans

60d coffee powder

70 holes

BEST MODE FOR CARRYING OUT THE INVENTION

[0021] Hereinafter, preferred embodiments of a coffee mill rotary blade and a coffee mill according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a coffee mill 1 according to an embodiment of the present invention. FIG. 2 is a side view of the coffee mill 1 shown in FIG.

[0023] The coffee mill 1 according to the embodiment of the present invention has an outer shape in which the tip of a cone is cut off. The coffee mill 1 includes a main body 2 having a plurality of vertical grooves on a side surface, and a transparent cup 3 that is an example of an outer cup that can be attached to and detached from the main body 2. A metal force cup 4, which is an example of an inner cup, is provided inside the transparent cup 3 with a gap from the transparent cup 3. Perforated regions 5 and 5 having a plurality of holes are respectively provided on the side surface and the top surface of the metal cup 4. Internal force of body 2 Power cord 6 is extended. By connecting the power cord 6 to the external power supply, the coffee mill 1 can be rotated inside the motor built in!

FIG. 3 is a partial cross-sectional view of the coffee mill 1 shown in FIG. 1 disassembled for each main part. The lower side of the main body 2 is not shown. In Fig. 3, only a part of each part is hatched to make the drawing easier to see.

[0025] The main body 2 mainly includes a rotary blade mounting portion 10 and a motor built-in portion 30. The rotary blade mounting portion 10 has a circular container shape, and screw-shaped irregularities 11 are formed on the inner surface. On the other hand, screw-shaped irregularities 7 are also formed on the outer surface of the opening end of the transparent cup 3. Place the transparent cup 3 on the inner surface of the rotary blade mounting part 10 When the transparent cup 3 is rotated in the same direction as the direction of the watch hands as viewed from the upward force, the unevenness 7 is held in the unevenness 11 and the transparent cup 3 and the rotary blade mounting portion 10 can be fixed. Also, from the state in which the unevenness 1 1 and the unevenness 7 are squeezed together, the transparent cup 3 is attached to the rotating blade by rotating the transparent cup 3 in the direction opposite to the direction of the watch's hand as seen from the upward force of the transparent cup 3. It can be separated from part 10.

A rubber O-ring (hereinafter referred to as “0 ring”) 12 is disposed on the inner bottom surface of the rotary blade mounting portion 10. In the hole of the O-ring 12, a tray 13 having the same size as the hole is fixed. The tray 13 has a cylindrical shape that protrudes upward from the O-ring 12, and has a concave portion 14 that is recessed downward on the upper surface thereof. On the cup end face of the metal cup 4, a ridge 8 is formed that extends horizontally by applying force to the outside of the opening face.延 The extension width of 8 is smaller than the width of O-ring 12. Also, the outer diameter and height of the pan 13 is such that when the metal cup 4 is placed on the O-ring 12, the pan 13 does not contact the metal cup 4 or even when it contacts, the 鍔 8 can adhere to the O-ring 12. It is designed in a large size. Further, when the transparent cup 3 is fixed to the rotary blade mounting portion 10, the open end of the transparent cup 3 is in contact with the flange 8 at a position where the flange 8 can be pressed toward the O-ring 12. For this reason, if coffee beans are ground inside the metal cup 4, there is no risk that the coffee powder will leak out of the metal cup 4 at locations other than the perforated area 5.

In the center of the rotary blade mounting portion 10 and the tray 13, a rotary shaft 15 is disposed so as to penetrate the rotary blade mounting portion 10 and the tray 13. The rotary shaft 15 is provided in the rotary blade mounting portion 10 so that the rotary shaft 15 itself can be rotated without rotating the rotary blade mounting portion 10 and the tray 13. A coffee mill rotary blade 16 is fixed to a rotary shaft 15 penetrating from the tray 13. The tip of the rotary shaft 15 protrudes from the coffee mill rotary blade 16, and a fixing member 17 for fixing the coffee mill rotary blade 16 to the rotary shaft 15 is attached to the protruding portion. .

[0028] On the lower surface of the rotary blade mounting portion 10, a coupling portion 18 for coupling with the motor built-in portion 30 is provided. The motor built-in unit 30 is a place in which a motor 35, which is an example of a rotary drive device, is built. The coupling portion 18 has a cylindrical shape that opens downward. Two protrusions 19 projecting outward from the side surface of the coupling portion 18 are formed on the outer surface of the coupling portion 18. Convex 1 9 and 19 are arranged to face each other at an interval of 180 degrees. However, the number and interval of the convex portions 19 are not limited to those described above.

On the other hand, a recessed region 31 that is recessed downward is formed above the motor built-in portion 30. On the inner side surface of the recessed area 31, two recessed parts 32, 32 that are recessed in the radial direction of the recessed area 31 are formed. The recesses 32, 32 are arranged to face each other at an interval of 180 degrees, and are formed with a longer width than the projections 19 in the circumferential direction of the inner surface of the recess region 31. Further, the groove 33 having a length substantially the same as the circumferential length of the convex portion 19 is formed so as to face each other at an interval of 180 degrees with the partial force of the concave portion 32 also directed upward. The outer shape of the coupling portion 18 and the inner diameter of the recess region 31 are substantially the same diameter. Therefore, if the convex portions 19, 19 are guided from the grooves 33, 33 to the concave portions 32, 32, and the rotary blade mounting portion 10 is rotated in a direction in which the convex portions 19, 19 are removed from the positions of the grooves 33, 33, the rotary blade mounting portion 10 and the motor built-in portion 30 can be fixed. When the rotary blade mounting part 10 and the motor built-in part 30 are separated from each other, the rotary blade mounting part 10 and the motor built-in part 30 are relatively moved so that the convex parts 19 and 19 come to the positions of the grooves 33 and 33. Rotate. As a result, the fitting between the convex portions 19 and 19 and the concave portions 32 and 32 can be released.

[0030] A fixing member 20 having a diameter larger than that of the rotating shaft 15 is fixed to the tip of the rotating shaft 15 on the opposite end to the side on which the coffee mill rotating blade 16 is attached. The fixing member 20 is a member for transmitting the driving force from the motor built in the motor built-in portion 30 to the rotating shaft 15. On the other hand, a space for arranging the motor 35 is provided below the recessed area 31 of the motor built-in portion 30 with a wall 34 therebetween. The shaft 36 of the motor 35 projects through the wall 34 and protrudes into the recessed area 31. The shaft 36 can rotate without applying a driving force to the wall 34. A concave fixing member 37 is fixed to the tip of the shaft 36. The recess 38 of the fixing member 37 has a form that can be coupled to the fixing member 20 fixed to the rotating shaft 15. A fitting structure of the fixing member 20 and the fixing member 37 is formed so that the fixing member 20 can be connected to the fixing member 37 when the rotary blade mounting portion 10 is connected to the motor built-in portion 30.

FIG. 4 is a perspective view of the coffee mill rotary blade 16. FIG. 5 is a plan view of the coffee mill rotary blade 16. FIG. 6 is a side view of the coffee mill rotary blade 16.

[0032] The coffee mill rotary blade 16 includes a first extension portion (one of the extension portions) 16a and a second extension portion (one of the extension portions) 16b extending at intervals of 180 degrees from each other. It is composed. First extension The portion 16a is folded at a horizontal portion 40 and a bend line 41 oblique to the extending direction of the first extending portion 16a from the horizontal portion 40 (that is, the radial direction of the rotation of the coffee mill rotary blade 16). It comprises a bent inclined portion 42 and a bent portion 44 that is bent from the inclined portion 42 along a bending line 43 that is perpendicular to the extending direction of the first extending portion 16a. The angle between the surface of the inclined portion 42 and the surface of the horizontal portion 40 (A angle in FIG. 4) is in the range of 135 to 165 degrees. In particular, the angle is preferably in the range of 140 to 160 degrees, and more preferably in the range of 145 to 155 degrees. Further, the angle between the surface of the inclined portion 42 and the surface of the bent portion 44 (B angle in FIG. 4) is in the range of 145 to 175 degrees. In particular, the angle is preferably in the range of 150 to 170 degrees, and more preferably in the range of 155 to 165 degrees.

[0033] The second extending portion 16b is in relation to the horizontal portion 50 and the extending direction of the second extending portion 16b from the horizontal portion 50 (that is, the radial direction of rotation of the coffee mill rotary blade 16). And a bent portion 54 bent at a folding line 53 perpendicular to the extending direction of the second extending portion 16b from the standing portion 52. It consists of. The standing portion 52 is bent in the vertical direction more than the inclined portion 42. The angle between the surface of the standing portion 52 and the surface of the horizontal portion 50 (C angle in FIG. 4) is in the range of 85 to 115 degrees. In particular, the angle is preferably in the range of 90 to: L 10 degrees, and more preferably in the range of 95 to 105 degrees. The angle between the surface of the standing portion 52 and the surface of the bent portion 54 (D angle in FIG. 4) is in the range of 195 to 225 degrees. In particular, the angle is preferably in the range of 200 to 220 degrees, and more preferably in the range of 205 to 215 degrees. The standing portion 52 may not be bent in a direction perpendicular to the inclined portion 42.

[0034] The first extending portion 16a mainly has a function of scooping up the coffee beans from the bottom to the top rather than crushing the coffee beans. The coffee beans on the surface of the horizontal portion 40 of the coffee mill rotary blade 16 are lifted above the coffee mill rotary blade 16 by the inclined portion 42. Further, the bent portion 44 has a function of collecting coffee beans and crushed coffee beans at the center of rotation. However, the bent portion 44 is not an essential configuration. However, it is convenient to pulverize the coffee beans by the second extending portion 16b. This is because the coffee beans collected at the center of the rotation are subjected to the centrifugal force generated by the rotation of the rotary blade 16 for the coffee mill and spread outward and are easily crushed by the second extending portion 16b. [0035] The second extending portion 16b mainly has a function of pulverizing coffee beans and blowing the pulverized coffee powder in the direction of the rotational radius. The coffee beans are wound upward by the first extending portion 16a by the rotation of the coffee mill rotary blade 16. The rolled coffee beans are pulverized mainly by the end surface 52 of the second extending portion 16b and the end surface of the bent portion 54. The ground coffee powder is blown off by the end faces of the standing part 52 and the bent part 54 outwardly of the radius of rotation and quickly exits from the perforated region 5 of the metal cup 4. The bent portion 54 is bent so as to extend further outward from the standing portion 52. One reason is that the first extending portion 16a and the second extending portion 16b are balanced to achieve normal rotation. Another reason for this is that coffee beans are rolled up by the coffee mill rotary blade 16, and the coffee powder that goes around the outside of the ground tornado-shaped coffee powder can be further ground. To increase efficiency.

FIG. 7 is a diagram showing a situation in which the coffee mill rotary blade 16 scoops the coffee beans 60 upward. FIG. 8 is a diagram showing a situation where the coffee mill rotary blade 16 crushes the scooped coffee beans 60 following the situation shown in FIG. In FIGS. 7 and 8, the force is illustrated by taking one coffee bean 60 as an example. In practice, many coffee beans 60 are picked up and crushed.

[0037] When the coffee mill rotary blade 16 rotates in the direction indicated by arrow A, the coffee beans 60 are picked up by the horizontal portion 40 and rolled up by the inclined portion 42, as shown in FIG. . That is, the coffee beans 60 move from the coffee beans 60 (60a) indicated by the dotted line to the coffee beans 60 (60b) indicated by the dotted line and to the coffee beans 60 (60c) indicated by the solid line (in FIG. Move as indicated by the arrow).

[0038] As shown in FIG. 8, the rolled up coffee beans 60 (60c) indicated by dotted lines are crushed by the end face of the standing portion 52 to become coffee powder 60d indicated by solid lines (in FIG. 8, dotted arrows) Changes as shown). The coffee powder 60d is again picked up by the horizontal portion 40, rolled up by the inclined portion 42, and crushed into finer grains by the end face of the standing portion 52. As a matter of course, when the coffee beans 60 (60c) or the coffee powder 60d goes outside the standing part 52, the coffee beans 60 (60c) or the coffee powder 60d is caused by the end face of the bent part 54. Smaller pulverized. The ground coffee powder 60d is standing The end faces of the portion 52 and the bent portion 54 are blown away outwardly of the rotating radius of the coffee mill rotary blade 16. As a result, only the fine powder out of the coffee powder 60 d comes out of the perforated region 5 of the metal cup 4. Further, as in the past, when the coffee beans 60 are densely packed, simply rotating the rotary blade tends to generate a small powder that strongly crushes the coffee beans 60. However, if the coffee beans 60 lifted into the space by the first extending portion 16a are beaten by the second extending portions 16b, the pressure applied to the coffee beans 60 is small, so that the coffee beans 60 can be roughly crushed.

FIG. 9 is an enlarged view of the perforated region 5 provided on the side surface of the metal cup 4.

[0040] The size of the hole 70 in the perforated region 5 may be appropriately changed according to the type of coffee and the taste of the drinker, but the diameter d of the hole 70 should be in the range of 0.5 to 0.9 mm. Furthermore, it is preferable that the thickness is in the range of 0.6 to 0.8 mm. When the hole 70 having such a size is formed, clogging of the perforated region 5 can be effectively reduced.

[0041] The occupation ratio of the holes 70 in the perforated region 5 (the area of the holes 70 per unit area of the perforated region 5) is preferably in the range of 30 to 60%. It is more preferable to set it to ˜50%. It is possible to make the occupancy of the holes 70 higher. As the usage time of the force mill increases, the perforated region 5 breaks and the risk of connecting the holes 70 increases. For example, when using a wire mesh in which the occupation ratio of the holes 70 is 80% or more, it becomes impossible to use in a few months unless an extremely tough metal material is used. The reason for this is that the coffee cup 60 rotates at a high speed while being crushed, so that the damage to the metal cup 3 is great. Therefore, when using a metal cup 4 with general metal material strength such as stainless steel, if the mill is assumed to be used for one year or more, it is preferable that the occupation ratio of the hole 70 be 60% or less. . On the other hand, if the occupancy ratio of the holes 70 is lowered too much, the separation efficiency between coarse and fine is deteriorated. In order to keep the separation efficiency high to some extent, it is preferable that the occupation ratio of the holes 70 be 30% or more. Therefore, considering the durability of the metal cup 4 and the high separation efficiency, the occupation ratio of the holes 70 in the perforated region 5 is preferably in the range of 30 to 60%.

FIG. 10 is a partial cross-sectional view showing a state in which the metal cup 4 is placed over the rotary blade mounting portion 10 and the transparent cup 3 is fixed from above.

[0043] In the state shown in FIG. 10, coffee beans 60 are put in the recess 14 of the saucer 13. When the mill rotary blade 16 is rotated in the direction of arrow X, the coffee beans 60 are crushed as shown in FIGS. Coffee powder 60d, which is smaller than the size of the hole 70 in the perforated region 5, is flipped outward by the standing portion 52 and the bent portion 54 as indicated by the arrow Y, and the gap between the metal cup 4 and the transparent cup 3 is removed. Move to. On the other hand, coffee powder 60d larger than the size of the hole 70 in the perforated region 5 remains in the metal cup 4.

[0044] When the coarse coffee powder 60d remaining in the metal cup 4 is used and the coffee drink is extracted, a coffee drink with a little bitterness can be obtained. The smaller coffee powder 60d stored in the gap between the metal cup 4 and the transparent cup 3 can be used for espresso coffee.

[0045] The vertical length L of the perforated region 5 provided on the side surface of the metal cup 4 is preferably as long as possible. In particular, the lower part of the perforated region 5 is preferably the same height as the open end of the tray 13 or below it. The vortex of the tornado-shaped coffee powder 60d formed by the coffee mill rotary blade 16 can be formed upward from the recess 14 of the tray 13. If there is a lower limit of the perforated region 5 above the contact point (or adjacent portion) A between the inner surface of the metal cup 4 and the recess 14, the amount of small coffee powder 60d that cannot come out of the hole 70 increases. In order to prevent this, it is preferable that the lower part of the perforated region 5 is formed so as to be at the same height as or lower than the opening end of the tray 13.

FIG. 11, FIG. 12, and FIG. 13 are perspective views showing modifications of the coffee mill rotary blade 16.

[0047] A modified example of the coffee mill rotary blade 16 shown in FIG. 11 (referred to as modified example 1) differs from the first extended part 16a shown in FIG. 4 in the form of the first extended part 16a. This is a modified example. In the first modification, an inclined portion 42 is formed on one side in the width direction of the horizontal portion 40 and is bent from a fold line 41 extending in parallel with the extending direction of the first extending portion 16a. The angle between the surface of the horizontal portion 40 and the surface of the inclined portion 42 (A angle shown in FIG. 11) is in the range of 135 to 165 degrees. In particular, the angle is preferably in the range of 140 to 160 degrees, and more preferably in the range of 145 to 155 degrees. Even if such a form of the first extending portion 16a is adopted, the coffee mill rotary blade 16 has the effect of lifting the coffee beans 60 upward on the surface of the horizontal portion 40 and the surface of the inclined portion 42. .

[0048] A modified example (referred to as modified example 2) of the coffee mill rotary blade 16 shown in FIG. This is an example in which the form of 16a and the second extending part 16b is modified to a form different from that of the first extending part 16a and the second extending part 16b shown in FIG. The first extending portion 16a of the modified example 2 has a form in which the inclined portion 42 is formed by bending the horizontal portion 40 from the folding line 41. Further, the second extending portion 16b of Modification 2 has a form in which the standing portion 52 is formed by bending the horizontal portion 50 from the folding line 51. The angle between the surface of the horizontal portion 40 and the surface of the inclined portion 42 (A angle shown in FIG. 12) and the angle between the surface of the horizontal portion 50 and the surface of the standing portion 52 (C angle shown in FIG. 12) are suitable. The angles are the same angles as those of the rotary blade 16 for the coffee mill shown in FIG. Unlike the coffee mill rotary blade 16 shown in Fig. 4, both the scooping and crushing functions of the coffee beans 60 can be provided to the coffee mill rotary blade 16 without forming the bent portion 44 and the bent portion 54. Can be granted.

[0049] A modified example of the coffee mill rotary blade 16 shown in FIG. 13 (referred to as modified example 3) is the first extending portion 16a and the second extending portion 16b in the form of the first extending portion shown in FIG. This is an example in which the extending portion 16a and the second extending portion 16b are modified into different forms. The first extending portion 16a of the modified example 3 has a form in which only the inclined portion 42 has a force. Further, the second extending portion 16b of Modification 3 has a form in which only the standing portion 52 has a force. A suitable angle of the inclined portion 42 from the horizontal plane (A angle shown in FIG. 13) is the same as that of the rotary blade 16 for the coffee mill shown in FIG. On the other hand, the preferred angle of the horizontal surface force of the standing portion 52 (C angle shown in FIG. 13) is in the range of 85 to 130 degrees, and in particular, the range of 90 to 125 degrees is preferred. S is more preferable. In the case of the second extending portion 16b, where only the standing portion 52 has a force, the horizontal portion 50 shown in FIG. 4 is not provided, so that the angle is relatively wide as long as it is within the metal cup 4. Can be adopted. In this way, unlike the coffee mill rotary blade 16 shown in FIG. 4, the coffee beans 60 can be raised and removed without forming the horizontal portion 40, the bent portion 44, the horizontal portion 50, and the bent portion 54. Both functions of crushing can be imparted to the coffee mill rotary blade 16.

[0050] As described above, the force described for the preferred embodiment of the rotary blade for coffee mill and the coffee mill using the same according to the present invention The present invention is not limited to the above-described embodiment, and is as follows. It is also possible to implement in the form.

[0051] The coffee mill rotary blade 16 may be an arbitrary combination of the first extending portions 16a and the second extending portions 16b shown in Modifications 1, 2, and 3. . The first extension A plurality of the projecting portions 16a and the second extending portions 16b may be attached instead of one. Furthermore, the number of the first extending portions 16a and the number of the second extending portions 16b may be changed.

[0052] The fold lines 41, 43, 51, 53 are not necessary, and the first extending portion 16a and the second extending portion 16b having a form that curves from one surface to the other surface are formed. It may be adopted.

[0053] Instead of the metal cup 4, an inner cup having a material force other than metal, such as ceramic, glass, or engineering plastic, may be employed. In addition, only the portion of the perforated region 5 of the metal cup 4 may be made of a material other than metal such as ceramics, glass, and engineering plastic. The transparent cup 3 is preferably an outer cup made of a transparent material such as glass and plastic. This is preferable because the crushed and classified state of the coffee beans 60 can be visually confirmed. However, if importance is placed on vivid visibility, an outer cup having the same shape as that of the transparent cup 3 may be produced using an opaque material.

[0054] The lower part of the perforated region 5 provided on the side surface of the metal cup 4 is designed to be lower than the opening end of the tray 13, but the lower end of the perforated region 5 is the opening end of the tray 13 It may be the same height as the section. Further, when it is not required that the classification performance is extremely high, the lower portion of the perforated region 5 may be above the opening end portion of the tray 13. In addition to the motor 35, the coffee mill 1 may have a rotation drive device that manually rotates the coffee mill rotary blade 16.

Industrial applicability

[0055] The present invention can be used in the industry for producing coffee powder or coffee beverages.

Claims

The scope of the claims

[1] A coffee mill rotary blade mounted on a coffee mill for crushing coffee beans into powder and separating the pulverized powder finely and coarsely while crushing, An extension portion attached substantially horizontally to the rotary shaft of the blade, the first extension portion having a function of scooping up the coffee beans to a lower force;

An extension part attached to the rotary shaft of the rotary blade, the second extension part having a function of pulverizing coffee beans wound up on a lower force;

A rotary blade for a coffee mill characterized by comprising:

[2] The first extending part includes an inclined part having an inclined surface in a place other than the extending direction, and the second extending part has the same part in the extending direction as the inclined part. The rotary blade for a coffee mill according to claim 1, further comprising an upright portion bent to the side.

[3] The first extending portion includes a horizontal portion extending in a substantially horizontal direction from the rotating shaft, and an inclined portion bent so as to have an inclined surface at a location other than the extending direction from the horizontal portion. And

The second extending portion includes a horizontal portion extending in a substantially horizontal direction from the rotating shaft, and a standing portion obtained by bending a portion in the extending direction from the horizontal portion to the same side as the inclined portion. The rotary blade for a coffee mill according to claim 1, wherein

[4] The force 1 according to any one of claims 1 to 3, wherein the first extension portion and the second extension portion extend in directions opposite to each other with respect to the rotation axis. Rotating blade for coffee mill as described.

[5] A coffee mill for pulverizing coffee beans into powder and separating the pulverized powder into fine and coarse powders,

An extension portion attached to the rotary shaft of the rotary blade substantially horizontally, a first extension portion having a function of scooping up coffee beans from below, and an extension portion attached to the rotary shaft of the rotary blade A rotary blade for a coffee mill having a second extending portion having a function of pulverizing coffee beans wound up on a lower force,

A rotational drive device for rotationally driving the rotational shaft;

An inner cup that includes a perforated area and covers an area in which the rotary blade for the coffee mill rotates; An outer cup disposed outside the inner cup and spaced from the inner cup;

A coffee mill characterized by comprising:

[6] The first extending portion includes an inclined portion having an inclined surface at a location other than the extending direction, and the second extending portion has the same location in the extending direction as the inclined portion. 6. The coffee mill according to claim 5, further comprising a standing portion bent to the side.

[7] The first extending portion includes a horizontal portion extending in a substantially horizontal direction from the rotating shaft, and an inclined portion that is bent so as to have an inclined surface at a location other than the extending direction from the horizontal portion. And

The second extending portion includes a horizontal portion extending in a substantially horizontal direction from the rotating shaft, and a standing portion obtained by bending a portion in the extending direction from the horizontal portion to the same side as the inclined portion. 6. The coffee mill according to claim 5, wherein

[8] The force 1 according to any one of claims 5 to 7, wherein the first extension portion and the second extension portion extend in directions opposite to each other with respect to the rotation axis. Listed coffee mill

[9] A recess for storing coarse coffee powder after separation is provided below the rotary mill for the coffee mill,

8. The contact point between the extension line of the peripheral edge of the concave portion and the inner cup disposed outside the concave portion is in the perforated region. Coffee minole.