JP2020182908A - Mill device - Google Patents

Abstract

To provide a mill device capable of restraining generation of noise and vibration by keeping an instantaneous load low when crushing coffee beans.SOLUTION: A mill device 20 includes a fixed blade 24 provided with a blade part 151A having a plurality of groove parts 153, 153, ... and a rotary blade 22 provided with a blade part 151 having a plurality of groove parts 153, 153, .... The rotary blade 22 rotates relative to the fixed blade 24 with the blade parts 151, 151A of the fixed blade 24 and the rotary blade 22 facing each other. Since there is a difference between a circumferential interval of the groove parts 153 of the fixed blade 24 and a circumferential interval of the groove parts 153 of the rotary blade 22, an instantaneous load applied to the fixed blade 24 and the rotary blade 22 can be reduced due to an offset in a crushing timing of coffee beans; therefore, vibration and noise the mill device 20 can be reduced.SELECTED DRAWING: Figure 19

Description

The present invention relates to a mill device having a pair of fixed blades and rotary blades having blades provided on one side thereof, and the blades of these fixed blades and rotary blades face each other and rotate relative to each other. Is.

Conventionally, as a mill device of this type, for example, mill blades in which a plurality of introduction recesses (corresponding to grooves of the present invention) are formed in a disk body are arranged in pairs so that the introduction recesses face each other. A mill device in which one of the blades is a fixed blade and the other is a rotary blade is known (see, for example, Patent Document 1). Such a mill device is configured so that coffee beans that have entered between the introduction recesses are sheared and crushed by a cutter blade formed on the trailing edge of the introduction recesses, and then further finely ground.

JP-A-2018-94188

However, in such a mill device, since the grooves of the fixed blade and the grooves of the rotary blade are provided in the same number and at equal intervals, coffee beans enter the grooves of the fixed blade and the rotary blade at the same time and are crushed at the same time. A momentary strong load is pulsatingly applied to the electric motor for rotating the rotary blade. Therefore, there is a problem that strong vibration and noise are generated.

An object of the present invention is to solve the above problems and to provide a mill device capable of suppressing the generation of noise and vibration by suppressing the momentary load at the time of crushing coffee beans to a low level.

The mill device according to claim 1 of the present invention has a fixed blade provided with a blade having a plurality of grooves and a rotary blade provided with a blade having a plurality of grooves, and these fixed blades. In a mill device in which the rotary blade rotates with respect to the fixed blade with the blade portions of the rotary blade facing each other, the circumferential spacing of the groove portion of the fixed blade and the circumferential spacing of the groove portion of the rotary blade are set. It was a mistake.

Further, in the mill device according to claim 2 of the present invention, in claim 1, the grooves of the fixed blade are formed at equal intervals in the circumferential direction, and the grooves of the rotary blade are formed at equal intervals in the circumferential direction. , The number of grooves formed in the fixed blade and the number of grooves formed in the rotary blade are different.

Further, the mill device according to claim 3 of the present invention has a common divisor of the number of grooves formed in the fixed blade and the number of grooves formed in the rotary blade in claim 2. It is a relationship that does not exist.

Further, in the mill device according to claim 4 of the present invention, in claim 1, groove portions of either the fixed blade or the rotary blade are formed at irregular intervals in the circumferential direction.

By configuring the mill device according to claim 1 of the present invention as described above, it is possible to reduce the momentary load applied to the fixed blade and the rotary blade by shifting the crushing timing of the coffee beans. The vibration and noise of the device can be reduced.

The grooves of the fixed blade are formed at equal intervals in the circumferential direction, the grooves of the rotary blade are formed at equal intervals in the circumferential direction, and the number of grooves formed in the fixed blade and the grooves formed in the rotary blade are formed. By making the number of grooves different, the coffee beans are crushed at equal intervals in time, so that the vibration and noise of the mill device can be further reduced.

Further, since the number of grooves formed on the fixed blade and the number of grooves formed on the rotary blade have no common divisor, the moment the coffee beans are crushed at a plurality of places at the same time. Since there is no such thing, the instantaneous load applied to the fixed blade and the rotary blade can be further reduced, and the vibration and noise of the mill device can be further reduced.

Further, by forming the grooves of either the fixed blade or the rotary blade at irregular intervals in the circumferential direction, the crushing timing of the coffee beans is shifted to reduce the instantaneous load applied to the fixed blade and the rotary blade. Therefore, the vibration and noise of the mill device can be reduced.

It is a perspective view of the coffee maker with an electric mill as the mill device which shows Example 1 of this invention in the state which the mill part was removed. The same is the perspective view of the drive unit. The same is the whole perspective view. Same as above, it is an overall explanatory view. Same as above, it is an exploded perspective view around the rotary blade mounting portion. Same as above, it is an exploded perspective view around the fixed blade mounting portion. Same as above, it is an exploded perspective view around the mill case of the mill part. Same as above, is a vertical cross-sectional view of the mill portion in the front-rear direction. Same as above, is a plan sectional view of the mill portion. Same as above, it is a vertical cross-sectional view of the mill portion in the left-right direction. Same as above, it is an exploded perspective view of the drive unit. Same as above, it is an exploded perspective view of the mill part with the fixed blade exposed. Same as above, it is an exploded perspective view of the mill part with the rotary blade exposed. In the same as above, it is explanatory drawing explaining the meshing of a drive gear and a driven gear. Same as above, it is an exploded perspective view of a rotary blade. The same is the perspective view of the rotary blade. Same as above, is a plan view of the rotary blade. Same as above, is a plan view of the fixed blade. Same as above, it is a plan view, FIG. 19A is a plan view of a rotary blade, and FIG. 19B is a plan view of a fixed blade. Same as above, it is a cross-sectional view of a main part, FIG. 20A is a cross-sectional view of a main part of a rotary blade, and FIG. 20B is a cross-sectional view of a main part of a fixed blade. Same as above, is a perspective view of the rear side of the rotary blade. It is an exploded perspective view of the rotary blade which shows Example 2 of this invention. The same is the perspective view of the rotary blade. It is a perspective view of the electric mill as the mill device which shows Example 3 of this invention in the state which the mill part was removed. It is a top view of the fixed blade which shows Example 4 of this invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the content of the present invention described in the claims. In addition, not all of the configurations described below are essential requirements of the present invention.

Hereinafter, Example 1 of the present invention will be described with reference to FIGS. 1 to 21. Reference numeral 1 denotes a coffee maker with an electric mill as a mill device, and the case main body 2 which is the main body of the coffee maker 1 is integrally formed with a rear standing portion 3 and a lower portion of the standing portion 3. It includes a mounting portion 4 on the front side and an eaves portion 5 integrally formed with the upper portion of the standing portion 3. A water storage unit 6 is provided in the vertical unit 3, and external water can be supplied to the water storage unit 6. In this example, the water storage unit 6 can be attached to and detached from the case body 2. A water storage container (not shown) is built in the water storage unit 6.

As shown in FIG. 4, a heating means 7 for heating the water in the water storage container is provided in the water storage unit 6. Further, the case body 2 is provided with a hot water sending means 9 for sending the hot water obtained by heating by the heating means 7 to the dripper 8. An example of the hot water supply means 9 is a pump or the like.

The above-mentioned placing portion 4 is provided with a substantially flat heating plate 11 so as to open upward and close the opening. A heater 12 is provided in thermal contact with the lower surface of the heating plate 11.

The beverage server 13 is detachably placed on the heating plate 11. The beverage server 13 is made of a heat-resistant glass container body 14 having an upper opening, a synthetic resin grip portion 15 attached to a side plate of the container body 14, and a synthetic resin covering the upper opening of the container body 14. The lid 16 is provided.

On the side portion of the upright portion 3, a mill portion 17, a hot water supply portion 18, and the dripper 8 serving as an extraction portion are arranged above the beverage server 13 of the above-mentioned standing portion 4.

The mill device 20 includes a mill unit 17 provided on the upper portion of the case body 2 for finely discharging coffee beans as a beverage raw material, and an electric motor 21 provided on the case body 2 for operating the mill unit 17. Have. In the case body 2 and the mill device 20, the front side is one side in the front-rear direction, and the rear side is the other side in the front-rear direction.

The mill portion 17 is detachably attached to the mounting recess 19 of the case body 2. Then, as shown in FIGS. 12 and 13, the mill portion 17 includes a rotary blade mounting portion 23 provided with a disk-shaped rotary blade 22 and a fixed blade mounting portion 25 provided with a disc-shaped fixed blade 24. It is configured to be disassembled into. The rotary blade 22 and the fixed blade 24 have a disk shape as a whole.

As shown in FIG. 5 and the like, the rotary blade mounting portion 23 includes the rotary blade 22 from the front side, a rotary holder 31 for mounting the rotary blade 22, a cover member 32, and a driven gear 33 as a driven side transmission mechanism. Be prepared. The rotary holder 31 integrally includes a disk-shaped mounting plate 34 for mounting the rotary blade 22 and a mill screw 35 projecting from the center of the mounting plate 34 to the front side, and at the center of the mill screw 35. A through hole 36 is bored. Further, around the front surface of the mounting plate 34, a pair of protrusions 37, 37 sandwiching the periphery of the rotary blade 22 are projected to the front side.

A blade portion 151 is provided on the front surface of the rotary blade 22 on one side, and a through hole 152 is formed in the center of the rotary blade 22. A plurality of through holes 34A are formed in the mounting plate 34, and as shown in FIG. 8, a screw 38 inserted through the through holes 34A from the rear side is inserted under the mounting boss 186 on the rear surface of the rotary blade 22. The rotary blade 22 is attached to the attachment plate 34 by screwing it into the hole 186A. The screw 38 is a screw-type fixing means. Further, the screw 38 is made of a metal having rust prevention properties (stainless steel in this example).

The cover member 32 is provided with a through hole 42 in the center of the disc portion 41, and a mounting cylinder portion 43 having a center hole larger than the diameter of the through hole 42 is projected from the front surface of the disc portion 41 to mount the cover member 32. The bearing member 44 is fixed in the tubular portion 43. Further, an outer cylinder portion 45 is integrally provided around the disk portion 41, the outer cylinder portion 45 is projected forward, and a female screw portion 45A is provided on the inner circumference of the outer cylinder portion 45. Further, a plurality of anti-slip recesses 45B and 45B are provided on the outer circumference of the outer cylinder portion 45 to form the anti-slip portion.

A through hole 47 is formed in the hub portion 46 at the center of the driven gear 33, and a flat surface portion (not shown) serving as a rotating shaft engaging portion is formed on the inner peripheral surface of the through hole 47. Then, the rotating shaft 48 made of a metal rod or the like is fixed to the through hole 36 of the mill screw 35 by insert molding or the like. The rear side of the rotating shaft 48 is rotatably inserted into the bearing member 44, and the rear end is inserted into the through hole 47 of the driven gear 33 in a non-rotating state. Then, by screwing the screw 49 to the rear end of the rotating shaft 48, the driven gear 33 is fixed to the rotating shaft 48.

As a result, the mounting plate 34 integrally provided with the mill screw 35 and the driven gear 33 are rotatably provided on the cover member 32, and the mounting plate 34 integrally provided with these mill screws 35. , The driven gear 33 and the rotating shaft 48 constitute a driven side transmission structure 50 as shown in FIG.

As shown in FIG. 7, the fixed blade mounting portion 25 includes a mill case 51, an upper case 52 mounted on the upper portion of the mill case 51, and a lower case 53 mounted on the lower portion of the mill case 51.

The mill case 51 has a tubular storage cylinder portion 55 for accommodating the rotary blade 22 and the fixed blade 24, a front wall portion 56 is provided at the front end of the storage cylinder portion 55, and a front wall portion 56 is provided at the center of the front wall portion 56. A through hole 56A is formed, and a guide cylinder portion 57 is projected from the rear side of the through hole 56A. Further, a small diameter portion 55B having a smaller diameter than the others is formed on the front side of the storage cylinder portion 55 corresponding to the position of the guide cylinder portion 57. The blade portion 151 is provided on the rear surface of the fixed blade 24 on one side, and the through hole 152 is formed in the center of the fixed blade 24. Then, the guide cylinder portion 57 is inserted into the through hole 152 of the fixed blade 24, and a part of the fixed blade 24 in the thickness direction is housed between the guide cylinder portion 57 and the small diameter portion 55B.

Further, the fixed blade mounting portion 25 has a guide wall portion 58 having a substantially U-shaped cross section on the front side of the through hole 56A. A vertical wall portion 59 that closes the front side of the guide wall portion 58 is provided at the front end of the guide wall portion 58, a through hole 59A is provided in the vertical wall portion 59, and a central hole is formed from the diameter of the through hole 59A. A large mounting cylinder portion 60 is projected forward from the vertical wall portion 59.

A bearing member 61 is fixed in the mounting cylinder portion 60, and the front end of the rotating shaft 48 is detachably inserted into the bearing member 61 from the rear side. Further, the rear portion of the storage cylinder portion 55 is opened, a male screw portion 55A is formed on the outer periphery of the storage cylinder portion 55, and the female screw portion 45A of the cover member 32 is formed on the male screw portion 55A of the storage cylinder portion 55. Screw it on and off.

Then, as shown in FIG. 8, the tip end side of the rotating shaft 48 is inserted through the through hole 56A of the storage cylinder portion 55 and the through hole 59A of the guide cylinder portion 57 from the rear side, and the storage cylinder portion 55 By screwing the female screw portion 45A of the cover member 32 into the male screw portion 55A and inserting the tip of the rotary shaft 48 into the bearing member 61, the mounting plate 34 of the rotary holder 31 and the rotary blade 22 are inserted. Is stored in the storage cylinder portion 55, the rotary blade mounting portion 23 is mounted on the fixed blade mounting portion 25, and the rotary holder 31 is rotatably mounted in the mill portion 17.

Further, a tubular drop port 62 is projected downward from the lower portion of the storage cylinder portion 55. The drop port 62 has a cylindrical shape and communicates with the bottom portion in the storage cylinder portion 55. Then, the coffee beans are ground between the rotary blade 22 and the fixed blade 24 to become coffee powder (ground beans), and the coffee powder in the storage cylinder portion 55 is from the drop port 62 to the center of the dripper 8. It is dropped and supplied to.

As shown in FIG. 9 and the like, the mill portion 17 is provided with a particle size adjusting means 65 for adjusting the degree of crushing (particle size) of coffee powder. The particle size adjusting means 65 adjusts the degree of crushing of coffee powder by adjusting the distance between the front surface of the rotary blade 22 and the rear surface of the fixed blade 24.

The particle size adjusting means 65 will be specifically described. The fixed blade mounting portion 25 is provided with a fixed blade holder 66 whose front-rear position can be adjusted. As shown in FIG. 6 and the like, the fixed blade holder 66 has a cylindrical front cylinder portion 67 arranged outside the mounting cylinder portion 60, and an inner flange portion is provided at the front end of the front cylinder portion 67. 67A will be installed around. Further, side wall portions 68, 68 are provided on the rear left and right sides of the front cylinder portion 67. The left and right side wall portions 68, 68 are arranged along the outer peripheral surface of the guide wall portion 58. Then, mounting portions 69 and 69 are provided at the rear ends of the side wall portions 68 and 68, respectively, and the mounting portions 69 and 69 sides are inserted into the insertion openings 63 and 63 of the storage cylinder portion 55. The front surface of the fixing blade 24 is fixed to the rear surfaces of the portions 69 and 69.

As shown in FIG. 7, on the left and right sides of the front wall portion 56 of the mill case 51, the insertion openings 63 and 63 into which the left and right mounting portions 69 and 69 are loosely inserted are provided. Through holes 69A and 69A are bored in the left and right mounting portions 69 and 69, respectively. Then, as shown in FIG. 9, by screwing the screw 70 (FIG. 9) inserted through the through hole 69A into the prepared hole 186A of the mounting boss 186 on the front surface of the fixed blade 24, the left and right mounting portions are formed. The fixed blade 24 is fixed to 69, 69. The screw 70 is made of a metal having rust prevention properties (stainless steel in this example). Further, a coil spring 71, which is an urging means, is provided on the mounting cylinder portion 60 as an exterior portion between the inner flange portion 67A of the fixed blade holder 66 and the vertical wall portion 59 of the mill case 51. The coil spring 71 urges the mill case 51 to move the fixed blade holder 66 forward.

The particle size adjusting means 65 has a rotary dial 72 which is an operation unit. The dial 72 is fixed in front of the front plate portion 74 of the pressing body 73. In the pressing body 73, a pressing cylinder portion 75 is integrally provided at the rear portion of the front plate portion 74, and a female screw portion 75A is formed on the pressing cylinder portion 75. A male screw portion 60A is provided on the mounting cylinder portion 60, and the female screw portion 75A is screwed into the male screw portion 60A. By this screwing, the pressing body 73 is provided so as to be able to move forward and backward with respect to the mill case 51.

Then, when the pressing body 73 is turned in the screwing direction by the dial 72, the pressing cylinder portion 75 retracts, and the fixing blade holder 66 is pushed to the rear end 75B of the pressing cylinder portion 75. And retracts, and the coil spring 71 is compressed. As a result, the distance between the fixed blade 24 and the rotary blade 22 is narrowed. On the other hand, when the dial 72 is turned in the opposite direction, the fixed blade holder 66 advances due to the elastic restoring force of the coil spring 71. As a result, the distance between the fixed blade 24 and the rotary blade 22 is increased.

Further, as shown in FIGS. 6 and 9, the particle size adjusting means 65 includes a clicking means 77 that defines the rotation angle of the dial 72. The click means 77 has a tubular body 78. A collar 78A is provided around the outer periphery of the tubular body 78 on the front side. Then, the tubular body 78 is inserted and arranged in the front tubular portion 67 of the fixed blade holder 66, and the flange portion 78A comes into contact with the front edge of the mounting tubular portion 60. At this time, the convex portion 60B provided on the front edge of the mounting cylinder portion 60 engages with the notch portion 78B formed in the flange portion 78A, so that the cylinder body 78 relates to the mounting cylinder portion 60. It is in a detent state. Further, a mounting cylinder portion 79 is integrally projected on the front side of the cylinder body 78 at a position deviated from the center of the cylinder body 78. The click rod 80 is inserted into the mounting cylinder portion 79 so as to be slidable back and forth, and after the click rod 80, a coil spring 81 as an urging means is arranged in the mounting cylinder portion 79. Then, the coil spring 81 urges the click rod 80 to the front side.

Further, a plurality of click recesses 83, 83 ... In which the click rod 80 is engaged are formed in the front plate portion 74 of the pressing body 73. These click recesses 83, 83 ... Are arranged at equal intervals in the circumferential direction with the rotation center of the pressing body 73 as the center. Then, as shown in FIG. 9, the tip 80S of the click rod 80 is formed on a convex curved surface. The click recess 83 is formed in a stepped hole, and the tip 80S engages in the large diameter portion 83A of the stepped hole.

Therefore, when the dial 72 is turned while the tip 80S of the click rod 80 is engaged with the click recess 83, the coil spring 81 contracts and the tip of the click rod 80 is contracted from the click recess 83. When the 80S is disengaged and the tip 80S engages with the adjacent click recess 83, the coil spring 81 is extended by the elastic restoring force, and a predetermined click feeling is obtained. Then, the distance between the fixed blade 24 and the rotary blade 22 can be adjusted according to the number of clicks. Therefore, the dial 72 may be provided with a scale indicating the degree of crushing corresponding to the click recess 83.

As shown in FIG. 7, the upper case 52 has a hopper 86 having a flat circular upper opening 85. The hopper 86 constitutes a part of the upper case 52. Further, lower openings 87 and 87 are provided on the left and right sides of the bottom surface portion 86A of the hopper 86. A chute portion 88 is provided under the lower openings 87, 87, and the lower portion of the chute portion 88 communicates with the upper opening of the guide wall portion 58 (FIG. 6). A lid 89 is detachably provided in the upper opening 85 of the upper case 52.

An upper front cover portion 91 is integrally provided on the front side of the hopper 86. As shown in FIG. 8 and the like, the upper front cover portion 91 constitutes a part of the upper case 52 and covers the front upper portion of the mill case 51. Then, an insertion hole 93 through which the pressing cylinder portion 75 is inserted is bored in the front surface portion 92 of the upper front cover portion 91.

The lower case 53 integrally includes a lower case main body 95 that covers the lower portion of the mill case 51 and a U-shaped lower front cover portion 96 that covers the front lower portion of the mill case 51. Then, the front edge portion 96A of the lower front cover portion 96 comes into contact with the rear surface of the front surface portion 92 of the upper front cover portion 91 (FIG. 8). Further, the lower case 53 covers the lower rear side of the mill case 51 and is fixed to the upper case 52. Further, a notch 97 is formed in the lower case main body 95, and the drop port 62 projects downward from the notch 97.

The mill portion 17 is provided with a detachable operation portion 101. As shown in FIGS. 7 and 10, the attachment / detachment operation unit 101 is provided with the sliders 103 and 103 so as to be movable in the left-right direction in the slide recesses 102 and 102 formed on the left and right outer surfaces of the hopper 86. It is composed. Each of these sliders 103 and 103 is provided with a locking claw portion 105 wider than the slide plate 104 on the outside of the slide plate 104 formed in the left-right direction, and the outer edge portion 105A of the locking claw portion 105 is oblique. Is formed in. A plate-shaped vertical portion 106 is provided on the upper portion of the locking claw portion 105. A laterally-oriented knob 107 projects outward from the upper portion of the vertical portion 106. A coil spring 108 as an urging means is arranged between the vertical portion 106 and the bottom surface of the slide recess 102, and the coil spring 108 urges the slider 103 to the outside. Contact edge portions 106A and 106A are projected from the front and rear side edges of the vertical portion 106, and the retaining edge portions 102A and 102A to which the contact edge portions 106A and 106A abut are provided on both front and rear side surfaces of the slide recess 102. Formed inward at the outer edge of the vertical edge of. That is, the range of movement of the slider 103 to the outside is restricted to a position where the contact edge portion 106A abuts on the retaining edge portion 102A. In FIG. 10, the state in which the slider 103 is retracted is shown by a solid line, and the state before the knob portion 107 is pressed is shown by a chain line. Then, in the state where the slider 103 is in the position of the chain wire, the attachment / detachment operation unit 101 is locked by the locking claw portion 105 in the locking hole portion 119 described later.

Arms 111 and 111 are projected outward on the upper left and right sides of the storage cylinder 55 of the mill case 51, and slide groove 112s on which the slide plate 104 slides are provided on the upper surfaces of the arms 111 and 111, respectively. It is formed. Further, outer collar portions 113, 113 are provided on the left and right sides of the upper edge of the lower case main body 95 corresponding to the arm portions 111, 111. The arm portions 111 and 111 are placed on the left and right outer collar portions 113 and 113 in a fitted state. Then, in this state, the upper and lower cases 52 and 53 are integrated by inserting the screw 115 (FIG. 7) into the through hole 114 of the outer flange portion 113 and fixing the screw 115 to the upper case 52. To.

As shown in FIG. 1, the mounting recess 19 is located on the front side recess 116 having a substantially U shape that opens to the front surface and the upper surface of the case body 2, and the rear side of the front recess 116, and is located on the rear side of the front recess 116. It has a circular rear recess 117 that opens into. The front side of the upper case 52 and the lower case 53 is housed in the front side recess 116, and the front surface portion 92 is substantially flush with the front surface of the eaves portion 5 in the stored state. On the other hand, the rear side of the upper case 52 and the lower case 53 is housed in the rear side recess 117, and the upper surface of the upper front cover portion 91 is substantially flush with the upper surface of the eaves portion 5 in the stored state. The upper opening 85 of the upper case 52 projects from the upper surface of the eaves 5.

Left and right operating recesses 118 and 118 are formed on the left and right sides of the rear recess 117 corresponding to the left and right sliders 103 and 103. Left and right side surface portions are vertically provided below the bottom surface portions 118A and 118A of the left and right operation recesses 118 and 118, and the locking claw portions 105 and 105 serving as locking portions are above the left and right side surface portions. The locking holes 119 and 119, which are slit-shaped locking receiving portions that can be locked, are formed.

Therefore, when the mill portion 17 is inserted into the mounting recess 19 from above, the outer edge portion 105A of the locking claw portion 105 comes into contact with the corner portion of the bottom surface portion 118A above the locking hole portion 119. When the mill portion 17 is pushed downward from here, the slider 103 retracts and the coil spring 108 contracts due to the inclination of the outer edge portion 105A. As a result, the locking claw portion 105 passes through the corner portion. After the locking claw portion 105 passes through the corner portion, the coil spring 108 extends and the locking claw portion 105 is locked to the locking hole portion 119. As a result, the mill portion 17 is fixed to the mounting recess 19.

On the contrary, when the left and right knob portions 107 and 107 are pushed inward, the locking claw portion 105 comes out from the locking hole portion 119, and the mill portion 17 can be removed from the mounting recess 19.

A drive unit 121 is provided in the case body 2. The drive unit 121 has a drive gear 122 that meshes with the driven gear 33. As shown in FIGS. 2 and 11, the drive unit 121 has a front holder 123 and a rear holder 124. The front holder 123 and the rear holder 124 are integrally assembled. Further, the electric motor 21 is attached to the rear side holder 124. An electric motor side gear 126 is provided on the rotating shaft of the electric motor 21. The front holder 123 has a front storage portion 127, and the rear holder 124 has a rear storage portion 128. The reduction gear group 129 is arranged inside the front and rear storage portions 127 and 128.

The reduction gear group 129 has a first rotating plate 130 and a second rotating plate 130A. Four shaft portions 131, 131, 131, 131 are projected from the rear portion of the first rotating plate 130, and reduction gears 132, 132, 132, 132 are provided on these shaft portions 131, 131, 131, 131. Is rotatably provided. Then, at the center of these reduction gears 132, 132, 132, 132, the electric motor side gear 126 meshes with the reduction gears 132, 132, 132, 132. On the other hand, the outer peripheral side of these reduction gears 132, 132, 132, 132 meshes with an internal gear (not shown) formed on the inner surface of the front accommodating portion 127. Further, a transmission gear 133 is integrally provided at the center of the front side of the first rotating plate 130. Then, the second rotating plate 130A is arranged on the front side of the first rotating plate 130. Four shaft portions 131A, 131A, 131A, 131A are projected from the rear portion of the second rotating plate 130A, and reduction gears 132A, 132A, 132A, 132A are provided on these shaft portions 131A, 131A, 131A, 131A. Is rotatably provided. Then, at the center of these reduction gears 132A, 132A, 132A, 132A, the transmission gear 133 meshes with the reduction gears 132A, 132A, 132A, 132A. On the other hand, the outer peripheral side of these reduction gears 132A, 132A, 132A, 132A meshes with an internal gear (not shown) formed on the inner surface of the front accommodating portion 127. Further, the drive gear 122 is integrally provided at the center of the front side of the second rotating plate 130A. On the rear side of the first rotating plate 130, a gear holder 134 close to the rear end of the shaft portion 131 is provided. Further, the rear end of the shaft portion 131 of the second rotating plate 130A is close to the front surface of the first rotating plate 130. The gear holder 134 has a disk-shaped front surface portion 134A in which the rear end of the shaft portion 131 is close to each other, and a tubular portion 134B integrally provided at the rear portion of the front surface portion 134A. A central through hole 134C is formed through the central portion of the front surface portion 134A. Then, the electric motor side gear 126 is inserted into the central through hole 134C, and the electric motor side gear 126 meshes with the reduction gears 132, 132, 132, 132 on the front side of the front surface portion 134A. The distance from the shaft portion 131 of the first rotating plate 130 to the front surface portion 134A of the gear holder 134 is shorter than the axial length of the reduction gear 132. Similarly, the distance from the shaft portion 131A of the second rotary plate 130A to the front surface of the first rotary plate 130 is also shorter than the axial length of the reduction gear 132A. Then, the electric motor side gear 126, the reduction gear 132, and an internal gear (not shown) constitute a reduction mechanism by a planetary gear mechanism. At this portion, the motor side gear 126 is a sun gear and the reduction gear 132 is a planetary gear. Similarly, the transmission gear 133, the reduction gear 132A, and an internal gear (not shown) constitute a reduction mechanism by a planetary gear mechanism. At this portion, the transmission gear 133 is a sun gear and the reduction gear 132A is a planetary gear.

A front surface portion 135 is integrally provided on the front side of the front storage portion 127 of the front side holder 123. On the front surface of the front surface portion 135, a notched cylinder portion 137 having a side opening portion 136 on the right side, which is one side on the left and right sides, is provided. Further, on the right side of the cutout cylinder portion 137, a substantially U-shaped vertical recess 138 is provided when viewed from the front.

The drive unit 121 is fixed in the case body 2 with the drive gear 122 inserted and arranged in the notch tube portion 137 from the rear side, and the side portion of the drive gear 122 is fixed from the side opening 136. Is exposed on the front side of the front surface portion 135 of the front side holder 123. Further, the rear end of the hub portion 46 of the driven gear 33 is loosely inserted into the vertical recess 138 from the upper opening 138A.

The drive gear 122 and the driven gear 33 are both spur gears, and the axial directions of the rotation center axes 122J and 33J, respectively, are horizontal and parallel. Then, with the mill portion 17 attached to the case body 2, the rotation center shafts 122J and 33J of the drive gear 122 and the driven gear 33 are aligned in a horizontal direction. Further, it is desirable that the rotation center shafts 122J and 33J are arranged at the same height. In this embodiment, as shown in FIG. 14, the rotation center shafts 122J and 33J mesh with each other at the same height in the mounted state. In this example, the rotation center shaft 33J of the driven gear 33 is the center shaft of the rotation shaft 48.

As a result, as described above, when the mill portion 17 is attached to the mounting recess 19 of the case body 2, the driven gear 33 meshes with the driving gear 122 while rotating. Therefore, the driving gear 122 and the driven gear 33 Can be reliably meshed. Further, as shown in FIG. 14, the drive gear 122 rotates clockwise so that the meshing side with the driven gear 33 moves downward. As a result, a force acts so that the driven gear 33 and, by extension, the mill portion 17 are pressed downward when a load is applied. That is, the force acts in the direction opposite to the direction in which the mill portion 17 is detached from the case body 2.

As shown in FIG. 4, an insertion hole 142 into which the drop port 62 is detachably inserted and connected is vertically provided in the center of the case 141 of the hot water supply unit 18. Then, by mounting the mill portion 17 in the mounting recess 19, the drop port 62 is connected to the insertion hole 142. Further, a shutter 143 for opening and closing the insertion hole 142 is provided below the insertion hole 142.

The case 141 is provided with a connecting portion 144, and hot water is sent to the connecting portion 144 from the hot water feeding means 9 through a liquid feeding path 9A. Then, the case 141 is provided with a plurality of nozzles 145 that supply the hot water to the dripper 8. Further, a paper filter 146 is interchangeably arranged in the dripper 8. Further, a liquid stop valve 147 is provided at the bottom of the dripper 8. Reference numeral 10 denotes a switch operated when the coffee maker 1 is used as the mill device.

Hereinafter, the configurations of the rotary blade 22 and the fixed blade 24 of the present invention will be described. In this example, the rotary blade 22 which is one of the rotary blade 22 and the fixed blade 24 includes four groove portions 153, 153, 153, 153. Further, the fixed blade 24, which is the other side of the rotary blade 22 and the fixed blade 24, includes five groove portions 153, 153, 153, 153, 153. Then, the rotary blade 22 is rotationally driven by the electric motor 21, and the fixed blade 24 is fixed. On the contrary, the rotary blade 22 may be configured to include five groove portions 153,153,153,153,153, and the fixed blade 24 may be configured to include four groove portions 153,153,153,153. Further, the groove portion 153 of the rotary blade 22 and the fixed blade 24 is curved in the same direction from the center to the outside.

As shown in FIGS. 15 to 21, the rotary blade 22 is integrally provided on one side surface of the disk body 150, which is a disk-shaped base, and the disk-shaped blade thinner than the disk body 150. It has a part 151 and. On the other hand, the fixed blade 24 has a disk-shaped base 150A and a disk-shaped blade portion 151A that is integrally provided on one side surface of the disk body 150A and is thinner than the disk body 150A. Further, the disc bodies 150 and 150A have the circular through hole 152 in the center. The disk bodies 150 and 150A have the same outer diameter and thickness, and the blade portions 151 and 151A have the same outer diameter and thickness.

On one surface side of the rotary blade 22, four groove portions 153, 153, 153, 153 are provided rotationally symmetrically, and are provided at 90 degrees at equal intervals in the circumferential direction. On the other hand, on one side of the fixed blade 24, five groove portions 153, 153, 153, 153, 153 are provided at 72 degrees at equal intervals in the circumferential direction. Further, the groove portion 153 of the disk body 150A is formed to be narrower than the groove portion 153 of the disk body 150.

As described above, the circumferential distance between the rotary blade 22 and the fixed blade 24 is different between the groove portions 153. Specifically, as shown in FIG. 19, the angle θ of the circumferential distance between the adjacent groove portions 153 and 153 of the rotary blade 22 is θ. Is 90 degrees, and the angle θ of the circumferential distance between the adjacent groove portions 153 and 153 of the fixed blade 24 is 72 degrees.

Further, the number of the groove portions 153 of the rotary blade 22 and the number of the groove portions 153 of the fixed blade 24 are set to have no common divisor. As a relationship without this common divisor, in this example, as a suitable combination, a configuration in which the number of groove portions 153 of the rotary blade 22 is four and the number of groove portions 153 of the fixed blade 24 is five is adopted. In addition to this, the number of groove portions 153 of the rotary blade 22 is 5, the number of groove portions 153 of the fixed blade 24 is 6 to 9, and the number of groove portions 153 of the rotary blade 22 is 7. An example is a configuration in which the number of groove portions 153 is 8 to 13. The angle θ of the circumferential distance between the adjacent groove portions 153 and 153 is equal to the angle of the circumferential distance between the adjacent cutter blades 157 and 157.

The plurality of groove portions 153, 153, ... Are formed so as to be delayed with respect to the relative rotation direction toward the outer peripheral side. The blade portions 151 and 151A are made of a metal plate 151K made of a plate material having a constant thickness, and are formed in a disk shape having the same diameter as the disk bodies 150 and 150A. Both sides of the blade portions 151 and 151A are formed on flat surfaces. Further, the blade portions 151 and 151A are provided with a through hole 152H in the center and four or five groove openings 155, 155 ... formed in an arc shape on the outside from the through hole 152H. Then, the hole portion is formed by these through holes 152H and the groove openings 155, 155 ... The blade portions 151, 151A are formed in a disk shape by punching a metal plate 151K as a base material with a press or the like, and the through holes 152H and four, five groove openings 155, 155 ... Is formed. The through hole 152H corresponds to the through hole 152. Further, the groove openings 155, 155 ... Correspond to the groove portions 153, 153 .... That is, the through hole 152H has substantially the same diameter as the through hole 152. Further, the groove opening 155 has the same shape as the groove 153 on one side surface of the discs 150 and 150A, and constitutes a part of the groove 153. Further, the blade portions 151, 151A are formed of a metal such as stainless steel or titanium, which has a higher hardness than the disk bodies 150 and 150A and has rust prevention properties. In this example, stainless steel is used. On the other hand, the disk bodies 150 and 150A are formed of a synthetic resin such as engineering plastic and a metal having rust prevention properties such as an aluminum alloy. That is, the disk bodies 150 and 150A can be easily and inexpensively manufactured by mold molding such as injection molding and die casting molding. In this example, engineering plastics such as POM and PBT having oil resistance are used.

In FIG. 17, the direction indicated by the white arrow is the rotation direction of the rotary blade 22. The groove openings 155, 155 ... Have a front curved edge portion 156 on the front side in the rotation direction thereof and a cutter blade 157 configured by the rear curved edge portion on the rear side in the rotation direction in the front view. .. These front curved edge portions 156 and the cutter blade 157 are edge portions formed on the blade portions 151 and 151A. Then, in the assembled state, the front curved edge portion 156 and the cutter blade 157 are provided along the groove portion 153 of the disk bodies 150 and 150A.

Further, when viewed from the front, the front curved edge portion 156 and the cutter blade 157 are curved so that the front side in the rotation direction is convex. That is, the groove openings 155, 155 ... Are curved rearward in the rotational direction from the arc inner edge portion 170 of the through hole 152 on the inner end side toward the curved intersection portion 158 on the outer end side. .. Both the front curved edge portion 156 and the cutter blade 157 have an arcuate shape, and the radius of curvature of the cutter blade 157 is slightly smaller than that of the front curved edge portion 156. Then, the outer end of the front curved edge portion 156 and the outer end of the cutter blade 157 intersect at the intersection portion 158 at a position near the outer circumference of the disk body 150. Further, the inner end of the cutter blade 157 intersects the arc inner edge portion 170 at the inner intersection portion 159. On the other hand, the inner end of the front curved edge portion 156 intersects the arc inner edge portion 170 at the inner intersection portion 159A.

Further, as shown in FIG. 19, the blade portions 151, 151A have the same diameters of the circumscribed circles 156G of the plurality of front curved edge portions 156, 156 ..., and the shapes of the cutter blade 157 and the arc inner edge portion 170. The front curved edge portion 156 of the five groove portions 153 in the blade portion 151A is formed shorter than the front curved edge portion 156 of the four groove portions 153 in the blade portion 151.

A connecting portion 165 is provided between the intersection portion 158 and the outer peripheral surface 151G of the blade portions 151, 151A. That is, the outer end of the front curved edge portion 156 and the outer end of the cutter blade 157 do not reach the outer peripheral surface 151G. By providing the connecting portions 165 in the blade portions 151 and 151A in this way, even if the rotary blade 22 is inclined relative to the fixed blade 24 when the beverage raw material is crushed, the connecting portions 165 are connected to each other. Will come into contact. Therefore, it is possible to prevent the cutter blade 157 of the rotary blade 22 and the cutter blade 157 of the fixed blade 24 from coming into contact with each other and being damaged.

On one side surface of the disk bodies 150 and 150A, the groove portion 153 has a front curved edge portion 156K and a rear curved edge portion 157K having the same shape as those of the front curved edge portion 156 and the cutter blade 157. It is formed. That is, the groove portions 153, 153 ... Are rear sides in the rotational direction from the arc inner surface portion 170K of the through hole 152 on the inner end side toward the intersection portion 158K on the outer end side in the disk bodies 150, 150A. Curves to. Further, the outer ends of the front curved edge portion 156K and the rear curved edge portion 157K are connected by an intersection portion 158K.

The bottom 160, which is the lowest portion of the groove 153, is one side edge of the through hole 152. Further, the groove portion 153 is formed in the disk bodies 150 and 150A in the depth direction from the front side groove inner surface portion 161 formed in the depth direction from the front side curved edge portion 156K and the rear side curved edge portion 157K. It has a rear groove inner surface portion 162. Then, the front gutter inner surface portion 161 and the rear gutter inner surface portion 162 intersect at the bottom edge portion 163 on the bottom side. The bottom edge portion 163 is formed from the rear end 160A of the bottom portion 160 in the rotational direction to the intersection portion 158K. The bottom edge portion 163 has a curved shape in a plan view. Further, the bottom edge portion 163 is formed so as to be inclined so as to be higher from the rear end 160A of the bottom portion 160 toward the intersection portion 158K. The plan view in this case is the case when viewed as shown in FIGS. 17 and 18.

Further, the rear groove inner surface portion 162 is formed so as to stand up substantially vertically. That is, the rear groove inner surface portion 162 has a curved shape having the same shape as the cutter blade 157 in a plan view. Then, the bottom edge portion 163 is located at the lower end of the rear gutter inner surface portion 162. On the other hand, the front gutter inner surface portion 161 is formed by a concave curved surface. The rear end of the front gutter inner surface portion 161 in the rotation direction is the bottom edge portion 163, and the inner end of the front gutter inner surface portion 161 is the bottom portion 160.

As shown in FIG. 15 and the like, the front groove inner surface portions 161 of the groove portions 153, 153 ... Are from the bottom edge portion 163 to the front curved edge portion in the rotation direction (circumferential direction) of the disk bodies 150, 150A. It tilts higher toward 156K. Then, in the front curved edge portion 156K, the front groove inner surface portion 161 has the same height as the flat surface portion 164 on the one surface side of the disk bodies 150 and 150A. The groove portion 153 and the groove opening portion 155 are formed so that the width becomes narrower from the central side toward the outer peripheral side. Further, the groove portion 153 is formed so as to become shallower from the central side toward the outer peripheral side.

Further, although it is desirable that the rear gutter inner surface portion 162 is vertical, the die has a draft so as to be slightly inclined toward the rear side in the rotational direction toward the upper side of the rear gutter inner surface portion 162. Is also good. The inclination angle of the rear groove inner surface portion 162 is less than 1 degree with respect to the vertical, and is 0.5 degrees in this example. The height of the rear gutter inner surface portion 162 is the depth of the groove portions 153, 153, .... Further, the groove introduction portions 153A, 153A ... Are configured by the central side of the disk body 150 of the groove portions 153, 153 .... The groove introduction portion 153A is continuously provided in the through hole 152.

Further, the inner end of the rear groove inner surface portion 162 intersects the arc inner surface portion 170K at the inner vertical edge portion 159K. On the other hand, the inner end of the front groove inner surface portion 161 intersects the arc inner surface portion 170K at the inner intersection portion 159B and the bottom portion 160. The inner vertical edge portion 159K and the arc inner surface portion 170K are provided at the positions of the inner intersection portion 159 and the arc inner edge portion 170.

The disk body 150 of the rotary blade 22 includes a fixing structure for fixing the blade portion 151. This fixed structure includes a plurality of (4 in this example) pilot holes 171 formed on one side surface of the disk body 150 and a plurality of (two in this example) projecting on one side surface of the disk body 150. It has a positioning protrusion 172 of the above. Then, the prepared hole 171 is provided between the groove portions 153 adjacent to each other in the rotation direction. Further, the positioning projection 172 is provided adjacent to a part of these prepared holes 171 and on the rear side in the rotation direction thereof. The prepared holes 171 are provided at equal intervals (90 degree intervals in this example) in the circumferential direction. Similarly, the positioning protrusions 172 are also provided at equal intervals (180 degree intervals in this example) in the circumferential direction. On the other hand, the blade portion 151 is provided with a tapered hole 173 corresponding to the prepared hole 171 and a positioning hole portion 174 corresponding to the positioning protrusion 172. Then, the tapered hole portion 171A is formed in the upper part of the prepared hole 171 so that the conical surface of the tapered hole 173 extends. Further, the positioning protrusion 172 is engaged with the positioning hole portion 174. The positioning means is configured by the positioning protrusion 172 and the positioning hole portion 174. The diameter of the tapered hole 173 is larger than that of the positioning protrusion 172. Therefore, even if the positioning protrusion 172 is mistakenly inserted into the tapered hole 173, the position cannot be determined.

Further, the disk body 150A of the fixed blade 24 includes a fixing structure for fixing the blade portion 151A. This fixed structure has a plurality of (five in this example) pilot holes 171 formed on one side surface of the disk body 150A. Then, the prepared hole 171 is provided between the groove portions 153 adjacent to each other in the rotation direction. The prepared holes 171 are provided at equal intervals in the circumferential direction (72 degree intervals in this example). On the other hand, the blade portion 151A is provided with a tapered hole 173 corresponding to the prepared hole 171. Then, the tapered hole portion 171A is formed in the upper part of the prepared hole 171 so that the conical surface of the tapered hole 173 extends. The disk body 150A is not provided with the positioning protrusion 172, and the blade portion 151A is not provided with the positioning hole portion 174.

As shown in FIG. 20, the blade portion 151 is positioned on the disk body 150 by engaging the positioning projection 172 into the positioning hole portion 174. Then, by screwing the countersunk screw 175 inserted through the taper hole 173 into the prepared hole 171 so that the blade portions 151 and 151A are fixed to the disk bodies 150 and 150A. In this fixed state, the head head 175A of the countersunk screw 175 is housed in the tapered hole 173, so that it does not protrude from one side surface of the blade portions 151, 151A. Further, the height of the positioning protrusion 172 of the disk body 150 is lower than the thickness of the blade portion 151. Therefore, the positioning protrusion 172 does not protrude from one side surface of the blade portion 151 in a state of being engaged in the positioning hole portion 174. Further, the countersunk screw 175 is a fixing means. The countersunk screw 175 is made of a metal having rust prevention properties (stainless steel in this example). The prepared hole 171 may be a simple cylindrical hole, or a female screw may be formed on the inner surface of the cylindrical hole. However, in this example, since the disk bodies 150 and 150A are formed of POM, PBT, or the like, it is not realistic to form a female screw. Therefore, in this example, the prepared hole 171 is simply a cylindrical hole, and the countersunk screw 175 is a tapping screw.

As shown in FIGS. 6, 7 and 21, a lightening portion 181 is provided on the other side surface of the disk bodies 150 and 150A. Specifically, as shown in FIG. 21, an outer peripheral tubular portion 182 is provided around the flat surface portion 164 forming a plate shape, a central tubular portion 184 is provided in the center of the flat surface portion 164, and the disk body 150 is further provided. By forming four curved plate-shaped groove forming portions 185, the lightening portion 181 having a concave other side is formed in the disk body 150A, while five curved plate-shaped groove forming portions 185 are formed in the disk body 150A. By forming, the lightening portion 181 having a concave other side is formed. The outer peripheral surface 150G is formed on the outer peripheral cylinder portion 182. Further, the central tubular portion 184 is formed in the center of the flat surface portion 164. Then, on the inner surface of the central tubular portion 184, the arc inner surface portion 170K (FIG. 16) constituting the through hole 152 is provided. Further, the groove portion 153 is formed in the groove forming portion 185. Then, a mounting boss 183 is formed on the flat surface portion 164 so as to project from the other side. The disk body 150 is provided with four mounting bosses 183, while the disk body 150A is provided with five mounting bosses 183. The mounting boss 183 is formed with the prepared hole 171 for mounting the blade portion 151. The mounting boss 183 is projected from another flat side surface of the flat surface portion 164.

Further, on the other side surface of the disk body 150, a plurality of the mounting bosses 186, which are mounting portions for the mill blade, are projected in the vicinity of the plurality of mounting bosses 183. On the other hand, on the other side surface of the disk body 150A, a plurality of the mounting bosses 186, which are mounting portions for the mill blade, are projected in the vicinity of the plurality of mounting bosses 183. Further, the mounting boss 183 and the mounting boss 186 each form a substantially cylindrical shape. Then, a part of the mounting boss 183 and the mounting boss 186 adjacent to each other is integrally molded. The screws 38 (FIG. 8) and 70 (FIG. 9) screwed with the mounting bosses 186 and 186 are made of a metal having rust prevention properties (stainless steel in this example). The prepared hole 186A may be a simple cylindrical hole, or a female screw may be formed on the inner surface of the cylindrical hole. However, in this example, since the disk body 150 is formed of POM, PBT, or the like, it is not realistic to form a female screw. Therefore, in this example, the prepared hole 186A is a simple cylindrical hole, and the screws 38 and 70 are tapping screws.

Next, the manufacturing process of the rotary blade 22 and the fixed blade 24 will be described. First, the manufacturing process of the blade portions 151 and 151A will be described. These blade portions 151 and 151A are formed by punching a stainless steel plate having a certain thickness by press working. By this press working, the disk-shaped blade portions 151 and 151A are punched out from the stainless steel plate. At the same time, the through hole 152H, the groove opening 155, the taper hole 173, and the positioning hole 174 are formed in the blade portions 151 and 151A. The tapered hole 173 is merely a through hole at this stage. In this way, when the metal plate 151K is punched out from the upper surface side by a male mold, the edge of the metal plate 151K on the upper surface side is formed into a substantially R shape due to plastic deformation. On the other hand, burrs are generated on the lower surface side edge of the metal plate 151K so as to project downward. Then, burrs are removed by scraping the metal plate 151K so that the lower surface side is flat. By removing the burrs in this way, a substantially right-angled and sharp edge forming the cutter blade 157 is formed in the groove opening 155. By arranging the lower surface of the metal plate 151K on one side surface, a sharp cutter blade 157 can be provided on one side surface of the rotary blade 22 and the fixed blade 24. The taper hole 173 is countersunk after pressing. As described above, the blade portion 151 provided with the cutter blade 157 can be manufactured inexpensively and easily by drilling by press working and subsequent simple deburring. Further, since stainless steel is used for the blade portions 151 and 151A, rust does not occur and the blades are suitable for washing with water or the like.

Further, in the case of engineering plastics such as POM and PBT, that is, synthetic resin, the disc bodies 150 and 150A are molded by mold molding such as injection molding. On the other hand, in the case of a metal having rust prevention properties such as an aluminum alloy, it is molded by casting using a mold such as die casting or shell mold casting. As described above, since the disk bodies 150 and 150A are made of synthetic resin or metal having rust prevention property, rust does not occur and the disk bodies are suitable for washing with water or the like.

Then, as described above, the blade portions 151, 151A and the disk bodies 150, 150A are fixed and integrated by the countersunk screw 175. Since the countersunk screw 175 is made of stainless steel, rust does not occur and the countersunk screw 175 is suitable for washing with water or the like.

As described above, the rotary blade 22 and the fixed blade 24 use a hard material only for the blade portions 151, 151A, and can be easily molded into the disk bodies 150, 150A serving as holders for the blade portions 151, 151A. Since an inexpensive material such as synthetic resin is used, molding is easy and the cost is low as a whole.

Next, an example of how to use the coffee maker 1 will be described. First, the user pulls out the dripper 8 horizontally from below the eaves 5, sets the paper filter 146 in the dripper 8, and then pushes the dripper 8 horizontally below the eaves 5. Then, the beverage server 13 is placed on the heating plate 11 of the above-mentioned placing portion 4. When the beverage server 13 is set on the heating plate 11, the curved surface-shaped convex portion 16A provided on the lid 16 of the beverage server 13 comes into contact with the liquid stop valve 147. The liquid stop valve 147 is pushed up to open. Then, an amount of water corresponding to the number of cups of coffee liquid to be extracted is put into the water storage unit 6. Further, the lid 89 of the mill portion 17 is removed, and a predetermined amount of coffee beans is put into the hopper 86 from the upper opening 85 which is the input port. At this stage, the shutter 143 is in a state of blocking the drop port 62, and the mill portion 17 and the inside of the dripper 8 are not in communication with each other.

Then, when the user operates the switch 10, four operations are performed at the same time. The first is that the shutter advancing / retreating means (not shown) moves the shutter 143 in the direction of opening the drop port 62. As a result, the drop port 62 opens, and the mill portion 17 communicates with the inside of the dripper 8. The second is to operate the mill device 20. As a result, the coffee beans are ground by the mill device 20 to obtain coffee powder, and the coffee powder is dropped and supplied from the drop port 62 into the paper filter 146 of the dripper 8. The third is to start energizing the heating means 7. As a result, the water in the water storage unit 6 is heated to become hot water. Further, the fourth is to start energizing the heater 12. As a result, the beverage server 13 placed on the heating plate 11 is heated.

In the mill device 20, the dial 72 is operated to adjust the particle size to a liking before adding coffee beans. Then, when the electric motor 21 is operated in order to operate the mill device 20, the rotation of the electric motor 21 is decelerated by the reduction gear group 129, transmitted to the drive gear 122, and meshed with the drive gear 122. The driven gear 33 rotates.

In this case, as shown in FIG. 14, the drive gear 122 rotates so that the meshing side with the driven gear 33 moves downward. As a result, a force acts so that the driven gear 33 and, by extension, the mill portion 17 are pressed downward when a load is applied. That is, since the force acts in the direction opposite to the direction in which the mill portion 17 deviates from the case body 2, the mill portion 17 can be driven stably.

The coffee beans fall from the lower openings 87 and 87 of the hopper 86 to the chute portion 88 and are sent into the storage cylinder portion 55 by the rotating mill screw 35. Then, in the storage cylinder portion 55, the coffee beans are crushed by the rotary blade 22 that rotates with the fixed blade 24.

Specifically, the coffee beans are fed from the through hole 152 of the fixed blade 24 to the groove introduction portions 153A, 153A, ... Of the rotary blade 22 and the fixed blade 24 by the rotating mill screw 35. Then, the coffee beans fed by the rotational movement of the rotary blade 22 are crushed by the cutter blades 157, 157 ... Of the opposite blade portions 151, 151A. That is, the coffee beans sent to the groove introduction portions 153A, 153A ... Are first sheared by the cutter blade 157. At this time, the coffee beans are not cut in two, but are roughly crushed. The coffee beans coarsely crushed by the cutter blade 157 are sent to the groove portions 153 on the rear side in the rotation direction of the cutter blade 157. Then, the groove portion 153 of the rotary blade 22 and the groove portion 153 of the fixed blade 24 cooperate with each other to send the crushed coffee beans in the centrifugal direction of the rotary blade 22 and the fixed blade 24, and the cutter of the rotary blade 22. The blades 157, 157, 157, 157 and the cutter blades 157, 157, 157, 157, 157 of the fixed blade 24 cooperate with each other to further shear and finely crush the crushed coffee beans. Then, the coffee beans crushed by the cutter blades 157, 157 ... Are further sent to the grooves 153, 153 ... On the rear side in the rotation direction, and then the same applies to these grooves 153, 153 ... It is sent in the centrifugal direction and crushed into smaller pieces. By repeating such movement and crushing of the coffee beans, the coffee beans are finely crushed and discharged from the outer circumferences of the rotary blade 22 and the fixed blade 24.

In this case, the rotary blade 22 is provided with four groove portions 153, 153, 153, 153 at equal intervals in the circumferential direction, and the fixed blade 24 is provided with five groove portions 153, 153, 153, 153, 153 at equal intervals in the circumferential direction. The angle θ of the circumferential spacing of the groove portions 153 and 153 of the rotary blade 22 is 90 degrees, whereas the angle θ of the circumferential spacing of the groove portions 153 and 153 of the fixed blade 24 is 72 degrees. The coffee beans do not enter the grooves 153 and 153 of the fixed blade 24 at the same time and are crushed at the same time, and the crushing timing of the coffee beans can be shifted to reduce the instantaneous load applied to the rotary blade 22 and the fixed blade 24. Therefore, the vibration and noise of the mill device 20 can be reduced. Specifically, while the rotary blade 22 makes one rotation, the coffee beans are crushed with the fixed blade 24 20 times at equal intervals of 18 degrees. And since the coffee beans are not crushed at two or more places at the same time, the load of one crushing is low. That is, since a small load is generated evenly many times, the vibration and noise of the mill device 20 can be reduced.

Compared to the case where the groove portions 153 of the rotary blade 22 and the fixed blade 24 are equidistant in the circumferential direction and the number of groove portions 153 is the same, the number of groove portions 153 of the rotary blade 22 and the fixed blade 24 are equidistant in the circumferential direction. The vibration and noise of the mill device 20 can be reduced when the values are different.

Further, in this embodiment, the number of the groove portions 153 of the rotary blade 22 and the fixed blade 24 is set to a number having no common divisor, but a combination of such numbers is not excluded. For example, when six groove portions 153 of the rotary blade 22 and the fixed blade 24 are provided at equal intervals in the circumferential direction, coffee beans enter at the same time through the six sets of groove portions 153 and are crushed at the same time, so that vibration and noise are generated. On the other hand, when the number of groove portions 153 of the rotary blade 22 is 6 at equal intervals in the circumferential direction and the number of groove portions 153 of the fixed blade 24 is 4 at equal intervals in the circumferential direction, the relationship has a common divisor of "2". In this case, although the coffee beans enter the two sets of grooves 153 at the same time by the rotary blade 22 and the fixed blade 24 and are crushed at the same time, the number of the six sets of the groove portions 153 of the rotary blade 22 or the fixed blade 24 Noise and vibration can be reduced as compared with the case where coffee beans enter at the same time and are crushed at the same time in four sets, which is the number of grooves 153.

Further, when the groove portions 153 of the rotary blade 22 and the fixed blade 24 are equidistant in the circumferential direction, the number of the groove portions 153 on one side of the rotary blade 22 and the fixed blade 24 is 6, and the number of the groove portions 153 on the other side is 5. The rotary blade 22 and the fixed blade 24 do not allow coffee beans to enter the groove 153 of a plurality of sets at the same time and be crushed at the same time. Specifically, while the rotary blade 22 makes one rotation, the coffee beans are crushed with the fixed blade 24 30 times at equal intervals of 12 degrees. And since the coffee beans are not crushed at two or more places at the same time, the load of one crushing is low. Therefore, the vibration and noise of the mill device 20 can be reduced. In this way, when the groove portions 153 of the rotary blade 22 and the fixed blade 24 are equidistant in the circumferential direction and the difference in the number of the groove portions 153 of the rotary blade 22 and the fixed blade 24 is one, the effect is ensured while ensuring the crushing effect. The vibration and noise of the mill device 20 can be reduced.

The blade portion 151 has a groove portion group 154 composed of a plurality of groove portions 153, 153, ... Formed so as to be thinner and shallower toward the outer peripheral side. Therefore, the coffee beans sent to the groove introduction portion 153A are crushed so as to gradually become finer according to the change in the depth of each of the groove portions 153, 153 .... Therefore, since the coffee beans are not crushed into small pieces at once, the coffee beans can be efficiently ground even with the electric motor 21 having a small output. Further, even in the electric motor 21 having a small output, the coffee beans can be satisfactorily ground at a low speed by using the deceleration mechanism, so that the temperature of the coffee beans does not rise so much at the time of crushing. Therefore, the flavor of coffee beans is not easily impaired.

Further, on one surface side of the rotary blade 22, the groove opening 155 and the through hole 152H are formed in the same shape, and the blade portions 151 are formed rotationally symmetrically, and the one surface side of the fixed blade 24 is the said. The groove opening 155 and the through hole 152H are formed in the same shape, and the blade portion 151A is formed symmetrically. Therefore, by crushing the coffee beans between the rotary blade 22 and the fixed blade 24, the coffee beans are crushed at positions symmetrical with respect to the rotation axis 48. Therefore, the load when crushing the coffee beans can be made substantially equal, and the coffee beans can be crushed satisfactorily.

The mill device 20 is stopped when a sufficient time has elapsed to grind all the predetermined amount of coffee beans.

Then, when the operation of the mill device 20 is stopped, the shutter advancing / retreating means (not shown) moves the shutter 143, and the shutter 143 closes the drop port 62. Then, after the shutter 143 closes the drop port 62, the water in the water storage unit 6 becomes hot water at a predetermined temperature (85 to 90 ° C.) by the heating means 7. When the temperature sensor (not shown) detects that the hot water in the water storage unit 6 has reached a predetermined temperature, the hot water in the water storage unit 6 is said to be hot water in the water storage unit 6 after the energization of the heating means 7 is stopped. The hot water is sent to the hot water supply unit 18 by the hot water supply means 9 via the liquid supply passage 9A, and hot water is jetted diagonally downward from the plurality of nozzles 145. After the hot water supply by this injection is continuously performed for a predetermined time, for example, 8 seconds, the hot water supply is stopped for 20 seconds, which is a predetermined steaming time, during which the coffee powder is steamed.

After the steaming time has elapsed, all the hot water in the water storage unit 6 is continuously supplied. As described above, the amount of water in the water storage unit 6 is an amount corresponding to the number of cups of coffee liquid to be extracted. Therefore, if all the hot water in the water storage unit 6 is supplied to the dripper 8. A predetermined number of cups of coffee liquid will be obtained, and the water storage unit 6 will be emptied.

The coffee liquid extracted by the dripper 8 passes through the liquid stop valve 147, passes through the through hole of the lid 16, and collects in the beverage server 13. Then, when the beverage server 13 is removed from the above-mentioned placing portion 4, the liquid stop valve 147 is pushed down and closed by an urging means (not shown) such as a coil spring, and coffee liquid is dropped from the dripper 8. Can be prevented.

After use, in order to clean the mill device 20, the locking claw portion 105 is removed from the locking hole portion 119 by holding the sliders 103 and 103 so as to narrow the distance between the knob portions 107 and 107, and the mill is used. The portion 17 is lifted and removed from the mounting recess 19. After removing the mill portion 17, the cover member 32 of the rotary blade mounting portion 23 is turned to release the screwing of the fixed blade mounting portion 25 with the mill case 51, and the rotary blade is released from the fixed blade mounting portion 25. Remove the mounting portion 23 by pulling it out.

By disassembling the mill portion 17 into the fixed blade mounting portion 25 and the rotary blade mounting portion 23 in this way, the fixed blade 24 and the rotary blade 22 are exposed as shown in FIGS. 12 and 13. As a result, the coffee powder remaining in the rotary blade 22 and the rotary blade mounting portion 23 and the coffee powder remaining in the fixed blade 24 and the fixed blade mounting portion 25 can be easily cleaned. As described above, the blade portions 151, 151A and the countersunk screw 175 are made of stainless steel having rust prevention properties, and the disc bodies 150 and 150A are also made of a material such as synthetic resin having rust prevention properties. Therefore, the rotary blade 22 and the fixed blade 24 can be cleaned by washing with water. Further, as described above, the screws 38 and 70 for fixing the 22 and the fixing blade 24 are also made of rust-preventive stainless steel. Therefore, the rotary blade mounting portion 23 and the fixed blade mounting portion 25, that is, the mill portion 17 can be cleaned by washing with water.

After cleaning the mill portion 17, the mill screw 35 is inserted into the fixed blade mounting portion 25, the tip of the rotating shaft 48 is inserted into the bearing member 61, and the male screw portion of the storage cylinder portion 55 is inserted. Since the mill portion 17 can be assembled by screwing the female screw portion 45A of the cover member 32 into 55A, assembly is also easy.

After assembling the mill portion 17, when the mill portion 17 is inserted into the mounting recess 19 from above, the outer edge portion 105A of the locking claw portion 105 comes into contact with the corner portion of the bottom surface portion 118A. When the mill portion 17 is pushed downward from here, the coil spring 108 contracts, and the locking claw portion 105 passes through the corner portion of the bottom surface portion 118A and is locked to the locking hole portion 119. As a result, the mill portion 17 can be mounted in the mounting recess 19. When the mill portion 17 is mounted in the mounting recess 19 in this way, the driven gear 33 that descends meshes with the drive gear 122 in the mounting recess 19 while rotating. Therefore, the drive gear 122 and the driven gear 33 Can be reliably meshed. In FIG. 14, the driven gear 33 meshes with the driving gear 122 while rotating clockwise. Then, when the mill portion 17 is attached to the mounting recess 19, the rotation center shafts 122J and 33J of the drive gear 122 and the driven gear 33 are displaced in the horizontal direction and are aligned at the same height.

As described above, in this embodiment, the fixed blade 24 provided with the blade portion 151A having a plurality of groove portions 153, 153 ... And the blade portion 151 having the plurality of groove portions 153, 153 ... Are provided. In a mill device 20 having a rotary blade 22 and the rotary blade 22 rotating with respect to the fixed blade 24 in a state where the fixed blade 24 and the blade portions 151, 151A of the rotary blade 22 face each other, the fixing is performed. Since the circumferential spacing of the groove 153 of the blade 24 and the circumferential spacing of the groove 153 of the rotary blade 22 are different, the crushing timing of the coffee beans is staggered and the fixed blade 24 and the rotary blade 22 are momentarily joined. Since the load can be reduced, the vibration and noise of the mill device 20 can be reduced.

The groove portions 153 of the fixed blade 24 are formed at equal intervals in the circumferential direction, the groove portions 153 of the rotary blade 22 are formed at equal intervals in the circumferential direction, and the number of groove portions 153 formed on the fixed blade 24 is increased. Since the number of groove portions 153 formed on the rotary blade 22 is different, the number of groove portions 153 formed on the fixed blade 24 is 5, and the number of groove portions 153 formed on the rotary blade 22 is the same. Since the number of the coffee beans is different from four, the coffee beans are crushed at equal intervals in time, so that the vibration and noise of the mill device 20 can be further reduced.

Further, since the number of the groove portions 153 formed on the fixed blade 24 and the number of the groove portions 153 formed on the rotary blade 22 have no common divisor, there are a plurality of coffee beans. Since there is no moment of being crushed at the same time, the momentary load applied to the fixed blade 24 and the rotary blade 22 can be further reduced, and the vibration and noise of the mill device 20 can be further reduced.

Hereinafter, as an effect in the embodiment, the rotary blade 22 and the fixed blade 24 have three or more groove portions 153, and the rotary blade 22 and the fixed blade 24 have groove portions 153 at equal intervals in the circumferential direction. When the difference in the number of groove portions 153 is one, the vibration and noise of the mill device 20 can be effectively reduced.

Further, as an effect in the embodiment, the disk body 150, 150A which is a disk-shaped base and the disk-shaped blade portions 151, 151A integrated on one surface side of the disk body 150, 150A are provided. The bodies 150 and 150A have a groove group 154 composed of a plurality of groove portions 153, 153 ... Formed so as to be thinner and shallower toward the outer peripheral side, and the blade portions 151 and 151A are formed along the groove portion 153. It has a front curved edge portion 156 and a cutter blade 157, which are formed edge portions, and the blade portions 151, 151A are made of a material having a hardness higher than that of the material constituting the disk bodies 150, 150A, and the blade portion 151 Since it is possible to use only 151A as a hard material and the discs 150 and 150A as a material that is easy to process, it can be constructed at low cost.

The blade portions 151 and 151A are made of a perforated metal plate having a through hole 152H as a hole portion and a groove opening 155, and the front curved edge portion 156 and the cutter blade 157 as the edge portion of the blade portions 151 and 151A are formed. Since it is formed in the groove opening 155 which is a hole of the metal plate 151K, the blade portions 151 and 151A can be easily and inexpensively manufactured by, for example, press working. Further, since the cutter blade 157, which is the edge of the blades 151 and 151A, is formed on the edge of the burr-side surface generated on the metal plate 151K by press working, the cutter blade 157 is sharpened by simple deburring. Therefore, the crushing performance of the mill blade can be improved.

Further, since the blade portions 151 and 151A are made of a metal plate 151K having a rust preventive property, the rotary blade 22 and the fixed blade 24 can be washed with water to be cleaned. Further, since the blade portions 151 and 151A are made of stainless steel, not only the rotary blade 22 and the fixed blade 24 can be washed with water to be cleaned, but also the mill blade can be manufactured at low cost.

Further, since the disk bodies 150 and 150A as the base are made of a material having rust prevention properties and moldable, for example, the disk bodies 150 and 150A can be manufactured at low cost by injection molding, mold molding or the like. Instead, the mill blade can be washed with water to clean it. Further, since the disc bodies 150 and 150A as the base are made of synthetic resin, not only the disc body 150 can be manufactured at low cost, but also the mill blade can be washed with water to be cleaned.

Further, since the cutter blades 157, 157 ... And the groove portions 153, 153 ... Are formed to be curved so as to be delayed in the rotational direction from the central side to the outer peripheral side of the disk bodies 150, 150A, they are crushed. The coffee powder is smoothly discharged to the outer peripheral surface 150G side. Further, since the groove introduction portions 153A, 153A ... Communicate with the through hole 152 substantially entirely except for the arc inner surface portion 170K, the groove introduction portion 152 is inserted into the groove introduction portion 153A. The sent coffee beans are guided to the cutter blade 157 by the groove portion 153, roughly crushed by the cutter blade 157, and then gradually crushed to a desired particle size by the cutter blade 157 on the rear side in the rotation direction.

Further, since the blade portion 151 is fixed to the disk bodies 150 and 150A by the countersunk screw 175 as the screw fixing means, one of the blade portions 151 and 151A and the disk bodies 150 and 150A can be exchanged. Further, since the lightening portion 181 is formed on the other side surface of the disk bodies 150 and 150A, the material cost of the disk bodies 150 and 150A can be reduced and at the same time the weight can be reduced. Further, since the groove introduction portions 153A, 153A ... Are substantially entirely communicated with the through hole 152 except for the arc inner surface portion 170K, coffee beans and the like sent from the through hole 152 can be used. It can be smoothly guided to the groove portion 153. Further, since the positioning means including the positioning protrusion 172 and the positioning hole portion 174 is provided, the assembly work of the blade portions 151, 151A and the disk bodies 150, 150A can be easily and surely performed. Further, in the mounted state, the upper surface of the head 175A of the countersunk screw 175 and the upper surface of the positioning protrusion 172 are housed below one side surface of the blade portions 151, 151A, so that the head 175A of the countersunk screw 175 and the upper surface of the countersunk screw 175 The positioning protrusion 172 does not interfere with the other blade portion 151. Further, since the head head 175A of the countersunk screw 175 is engaged with the tapered hole portion 171A of the disk body 150, 150A and the tapered hole 173 of the blade portion 151, the disk body 150, 150A and the blade portion 1511 A positioning effect with 151A can be obtained. Further, since the arc inner surface portion 170K, which is a partition portion for partitioning the adjacent groove portions 153 and 153, is vertically vertically provided continuously to the through hole 152, the coffee beans are substantially evenly provided in the plurality of groove portions 153. Etc. can be supplied. Further, since the mounting boss 183 and the mounting boss 186 adjacent to each other are partially integrally molded, the mounting strength of the blade portions 151, 151A and the mounting strength of the mill blade itself with respect to the disk bodies 150 and 150A are improved. can do. Further, a metal plate 151K made of stainless steel and having a constant thickness is formed by punching a hole portion to be the through hole 152H and the groove opening 155 by press working, and a burr protruding toward the lower surface side of the edge of the hole portion. Is a processing method of the cutter blade 157 that forms a right-angled edge constituting the cutter blade 157. Therefore, by arranging the lower surface of the metal plate 151K on one side surface, the mill blade is sharpened on one side surface. Since the cutter blade 157 can be provided and the cutter blade 157 can be sharpened by simple deburring, the crushing performance of the mill blade can be improved.

Further, the case main body 2 which is the main body, the mill portion 17 provided on the upper part of the case main body 2 to finely discharge the coffee beans which are the beverage raw materials, and the mill portion 17 provided on the case main body 2 to operate the mill portion 17. In the mill device 20 having the electric motor 21 for the purpose, the mill portion 17 is detachably attached to the case body 2, and the mill portion 17 is a driven gear 33 serving as a driven side transmission mechanism and the driven gear 33. A disk-shaped rotary blade 22 connected to the mill portion 17 and detachably attached to the mill portion 17, and a disk-shaped fixed blade 24 provided facing the rotary blade 22 and fixed to the mill portion 17. The case body 2 has a drive gear 122 that is a drive side transmission mechanism that is rotated by the electric motor 21 and is detachably coupled to the driven gear 33. Therefore, the case body 2 to the mill portion 17 By removing the rotary blade 22 together with the driven gear 33 from the mill portion 17 after removing the whole, not only the rotary blade 22 can be easily maintained, but also the mill portion 17 is held by the mill portion 17. The fixed blade 24 can be easily maintained.

Since the drive-side transmission mechanism is the drive gear 122 and the driven-side transmission mechanism is the driven gear 33, the degree of freedom of the attachment / detachment structure of the mill portion 17 to the case body 2 can be increased.

Further, the rotation center shaft 122J of the drive gear 122 is provided horizontally, and the mill portion 17 can be attached to and detached from above where the rotation center shaft 122J intersects the case body 2, and the rotation center shaft 122J Since the mill portion 17 is not engaged and disengaged in parallel with the direction, not only the mill portion 17 can be easily attached to and detached from the case body 2, but also the gears 33 and 122 can be easily meshed with each other.

Further, since the mill screw 35 is provided in the rotary blade mounting portion 23, the mill screw 35 is pulled out from the guide wall portion 58 by removing the rotary blade mounting portion 23 from the fixed blade mounting portion 25, and the mill screw 35 is pulled out. It becomes easier to clean the inside of the mill case 51. Further, since the fixed blade 24 and the rotary blade 22 are housed in the storage cylinder portion 55 in the state where the mill portion 17 is assembled, coffee powder is placed between the rotary blade 22 and the cover member 32. Is hard to invade and easy to maintain. Further, the particle size adjusting means 65 is incorporated into the fixed blade mounting portion 25, the fixed blade holder 66 is inserted into the front wall portion 56 of the storage cylinder portion 55, and the rear side of the fixed blade holder 66 is inserted into the storage cylinder portion. Since the fixed blade holder 66 is arranged in the 55 so that the front-rear position can be adjusted and the position of the fixed blade 24 is adjusted, the particle size of the beverage raw material can be stably adjusted. Further, since the left and right operating recesses 118 and 118 are formed on the left and right of the rear recess 117 corresponding to the left and right sliders 103 and 103, the mill portion 17 can be easily removed. Further, since the rear end of the hub portion 46 of the driven gear 33 is loosely inserted into the vertical recess 138 from the upper opening 138A, the hub portion 46 of the driven gear 33 is said to be attached when the mill portion 17 is attached. Guided by the vertical recess 138, the mounting work can be performed stably. Further, a pair of the protrusions 37, 37 sandwiching the periphery of the rotary blade 22 are projected on the front side around the front surface of the mounting plate 34, and the protrusions 37, 37 are provided together with the rotary blade 22. By rotating in close proximity to the inner circumference of the storage cylinder portion 55, coffee powder accumulated on the inner circumference of the storage cylinder portion 55 can be removed.

Further, the reduction gear group 129 has four shaft portions 131, 131, 131, 131 projecting from the rear portion of the first rotating plate 130, and is a planetary gear on each shaft portion 131, 131, 131, 131. The reduction gears 132, 132, 132, 132 are rotatably provided, and the electric motor side gear 126, which is a sun gear at the center of these reduction gears 132, 132, 132, 132, is attached to each reduction gear 132, 132, 132, 132. The transmission gear 133, which is a sun gear, is integrally provided at the center of the front side, which is one side surface of the first rotating plate 130, and the transmission gear 133 is integrally provided on the rear side, which is the other side surface of the second rotating plate 130A. Since the reduction gears 132A, 132A, 132A, 132A, which are a plurality of planetary gears having fewer teeth than the gear 133, are rotatably provided and the reduction mechanism is composed of the planetary gear mechanism in this way, a high reduction effect is achieved in a small space. Is obtained.

Further, since the drop port 62 of the mill portion 17 is provided at the center of the plurality of nozzles 145, the coffee powder can be dropped and supplied to the center of the dripper 8. Further, the drop port 62 can be opened and closed by the shutter 143 which is an opening / closing means. Further, by attaching / detaching the mill portion 17 to the mounting recess 19, the drop port 62 can be connected to and disconnected from the insertion hole 142 which is the connection receiving portion of the hot water supply portion 18.

22 to 23 show a second embodiment of the present invention, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted in detail. The figure shows a modified example of the rotary blade 22 and the fixed blade 24.

In this example, the prepared hole 171 and the positioning protrusion 172 are not provided in the disk body 150 of the rotary blade 22. Therefore, the tapered hole 173 and the positioning hole 174 are not provided in the blade portion 151. Then, in the manufacturing, insert molding is performed. That is, in a state where the blade portion 151 is arranged in a molding die (not shown), the molding die is filled with molten resin, and the resin is solidified to form the disk body 150, and the disk body 150 is formed. The 150 and the blade portion 151 are integrated.

Further, although not shown, the prepared hole 171 is not provided in the disk body 150A of the fixed blade 24. Therefore, the tapered hole 173 is not provided in the blade portion 151A. Then, in the manufacturing, insert molding is performed. That is, in a state where the blade portion 151A is arranged in a molding die (not shown), the molding die is filled with molten resin, and the resin is solidified to form the disk body 150A, and the disk body is formed. The 150A and the blade portion 151A are integrated.

As described above, in this embodiment, the same actions and effects as those in Example 1 are exhibited. Further, in this example, since the disk bodies 150 and 150A and the blade portions 151 and 151A are integrated by insert molding, the fixing structure and the fixing work become unnecessary.

FIG. 24 shows Example 3 of the present invention, the same parts as those in the above Examples are designated by the same reference numerals, and the description thereof will be omitted in detail. The figure shows an electric mill device 200, and the case body 201 is provided with a mill unit 17 and a drive unit 121.

As shown in the figure, the case body 201 has a substantially rectangular parallelepiped shape. A mounting recess 19 is provided in the upper part of the case body 201, and the mill portion 17 is detachably provided in the mounting recess 19. Further, the drive unit 121 is built in the upper rear side of the case body 201.

A storage case 202 for storing coffee powder dropped from the drop port 62 of the mill portion 17 is built in the lower front side of the case body 201. The storage case 202 is configured so that it can be pulled out from an opening 203 provided in the lower part of the front surface of the case body 201, and a handle portion 204 is provided in the front surface thereof.

As described above, since this embodiment is a mill device 200 including a rotary blade 22 and a fixed blade 24 which are mill blades, and these rotary blades 22 and a fixed blade 24, the same operation and effect as in the first embodiment. Play.

Further, the case main body 201 which is the main body, the mill portion 17 provided on the upper portion of the case main body 201 to finely discharge coffee beans which are the beverage raw materials, and the mill portion 17 provided on the case main body 201 to operate the mill portion 17. In the mill device 200 having the electric motor 21 for the purpose, the mill portion 17 is detachably attached to the case main body 201, and the mill portion 17 is a driven gear 33 serving as a driven side transmission mechanism and the driven gear 33. A disk-shaped rotary blade 22 connected to the mill portion 17 and detachably attached to the mill portion 17, and a disk-shaped fixed blade 24 provided facing the rotary blade 22 and fixed to the mill portion 17. The case body 201 has a drive gear 122, which is a drive-side transmission mechanism that is rotated by the electric motor 21 and is detachably coupled to the driven gear 33. Therefore, the same operation as in the first embodiment. It works.

FIG. 25 shows Example 4 of the present invention, the same parts as those in the above Examples are designated by the same reference numerals, and the description thereof will be omitted in detail. The figure shows a modified example in which one groove portion 153 of the rotary blade 22 and the fixed blade 24A is formed at irregular intervals in the circumferential direction.

In this example, the rotary blade 22 has four groove portions 153 formed at equal intervals in the circumferential direction as in the first embodiment, and the fixed blade 24A has four groove portions 153 formed at equal intervals in the circumferential direction. .. The angles θ1, θ2, θ3, and θ4 of the circumferential intervals of the adjacent groove portions 153 and 153 of the fixed blade 24A are 80 degrees, 95 degrees, 100 degrees, and 85 degrees, and the angles θ1, of all the circumferential intervals. θ2, θ3, and θ4 are different from 90 degrees, which is the circumferential interval of the rotary blade 22.

In this case, the groove portion 153 of the fixed blade 24A has the same shape of the cutter blade 157, the inner intersection portion 159, and the arc inner edge portion 170, and corresponds to the angles θ1, θ2, θ3, and θ4 of the circumferential spacing, and the front curved edge portion. The groove portion 153 that forms 156 and has a large circumferential interval angle θ1, θ2, θ3, and θ4 becomes wide.

In this way, when the fixed blade 24A has four groove portions 153, 153, 153, 153 formed at equal intervals in the circumferential direction and the fixed blade 24A has the same number of four groove portions 153, 153, 153, 153, the rotary blade 22 is adjacent to the rotary blade 22. If the angle of the circumferential distance between the two matching grooves 153 and 153 is set to a value other than 90 degrees and the angle θ of the remaining two adjacent grooves 153 and 153 is set to 90 degrees, all angles are set. Vibration and noise can be reduced as compared with the case where θ is 90 degrees. However, when any of θ1 to θ4 is 90 degrees, the coffee beans are simultaneously crushed by the two adjacent groove portions 153 and 153 of the fixed blade 24A and the two adjacent groove portions 153 and 153 of the rotary blade 22. As a result, the load is biased, so that vibration and noise can be reduced when all angles are different. Further, for example, when the sum of θ1 and θ2 is 180 degrees, the coffee beans are crushed at the same time in the two sets of grooves 153 and 153, so that the sum of the adjacent angles of θ1 to θ4 is 180 degrees. It is desirable not to become.

As described above, in this embodiment, the circumferential spacing of the groove portion 153 of the fixed blade 24A and the circumferential spacing of the groove portion 153 of the rotary blade 22 are different. Therefore, the same operation as that of the first embodiment is performed.・ Effective.

Further, since the groove portions 153 of the fixed blade 24A, which is either the fixed blade 24A or the rotary blade 22, are formed at irregular intervals in the circumferential direction, the coffee bean crushing timing is shifted to form the fixed blade 24A and the fixed blade 24A. Since the momentary load applied to the rotary blade 22 can be reduced, the vibration and noise of the mill device 20 can be reduced.

The present invention is not limited to the above examples, and various modifications can be made within the scope of the gist of the invention. For example, in the above embodiment, the number of grooves of the fixed blade is larger than the number of grooves of the rotary blade, but the reverse is also possible, and the grooves of the rotary blade may be formed at irregular intervals in the circumferential direction. Further, the grooves of both the rotary blade and the fixed blade may be formed at irregular intervals in the circumferential direction. Further, the angles θ1, θ2, θ3, and θ4 can be appropriately selected. Further, in the above embodiment, the curved groove opening and the groove are shown, but the groove opening and the groove may be substantially triangular, and even in the case of the substantially triangular groove opening and the groove, the outer intersection. It is preferable to arrange the groove opening and the groove diagonally so that the portion is located on the rear side in the rotation direction from the inner intersection. Further, it is preferable that the rotation center axes of the driven gear and the drive gear have the same height, but the rotation center axis of the driven gear is set higher than the rotation center axis of the drive gear so that the driven gear and the drive gear mesh with each other. Is also good. In this case, it is preferable to shift the plane position of the rotation center axes so that the rotation center axes are not located directly above each other. Further, the mill device of the present invention is suitable for crushing coffee beans, but other than coffee beans, for example, tea or the like may be crushed.

20 Mill device 22 Rotary blade 24,24A Fixed blade 151,151A Blade part 151K Metal plate 153 Groove part

Claims (4)

It has a fixed blade provided with a blade having a plurality of grooves and a rotary blade provided with a blade having a plurality of grooves, and these fixed blades and the blades of the rotary blade face each other. In a mill device in which the rotary blade rotates with respect to the fixed blade
A mill device characterized in that the circumferential spacing of the groove portions of the fixed blade and the circumferential spacing of the groove portions of the rotary blade are different. The grooves of the fixed blade are formed at equal intervals in the circumferential direction, the grooves of the rotary blade are formed at equal intervals in the circumferential direction, the number of grooves formed in the fixed blade, and the grooves formed in the rotary blade. The mill device according to claim 1, wherein the number of grooves is different. The mill device according to claim 2, wherein the number of grooves formed in the fixed blade and the number of grooves formed in the rotary blade have no common divisor. The mill device according to claim 1, wherein the grooves of either the fixed blade or the rotary blade are formed at irregular intervals in the circumferential direction.