JPH0245892B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a coffee boiler that grinds coffee beans and supplies hot water to the ground coffee powder.

(b) Conventional technology This kind of conventional coffee boiler is, for example, made by Jitsukasho.
As shown in No. 59-108521, the sieve plate with perforated holes is in the form of a flat plate and is placed on the bottom of the upper case, so when the cutter is driven to crush the coffee beans, the synthetic resin upper The inner wall surface of the case was easily scratched and damaged by collisions with coffee beans.

In order to improve the above, a metal sieve plate is drawn into a bottomed cylinder shape, and a flat plate-shaped sieve part with through holes and a cylindrical protection cylinder part are integrally formed. The protective cylinder was designed to prevent the upper case from being scratched by the aforementioned coffee beans.

However, since the holes are drilled after the drawing process, the holes get in the way and the holes cannot be drilled in the front of the sieve, and the area around the sieve becomes a blind area. As a result, most of the coffee powder after grinding falls through the hole into the lower case, but the coffee powder on the blind part remains in this area,
The drawback was that it could not contribute to the extraction of coffee liquid.

(C) Problems to be Solved by the Invention The present invention is capable of ensuring that even if the drawn metal sieve plate is used, the ground coffee powder does not remain around the sieve plate and falls onto the lower case below. The purpose is to do so.

(d) Means for Solving the Problems The present invention is characterized in that a metal sieve plate fitted into an upper case in which a cutter is rotatably provided is formed by drawing into a cylindrical shape with a bottom, and the bottom surface is transparent. A hole is bored, and an inclined surface portion inclined toward the through hole is formed around the bottom surface of the hole.

(e) Effect With the structure of the present invention, the coffee powder ground by the cutter does not remain around the upper case due to the centrifugal force of the cutter, but instead flows through the inclined surface of the sieve plate. It is guided smoothly into the through hole along the .

(F) Embodiment 1 is a coffee boiler main body, which has a water tank 2 for storing water on the top surface, a mounting base 4 in which a mill motor 3 is installed, and a mounting part 6 on which a decanter 5 is mounted. ing. The mounting portion 6 has an opening 50 to expose the heater 7 so that the decanter 5 can be placed directly on the heater 7. The decanter 5 has a handle 8 attached to its outer surface and a removably attached lid 9 having a notch 55 at its upper opening. The mill motor 3 has a lower joint 10 slightly protruding from the upper surface of the mounting base 4. Reference numeral 11 denotes a lower case made of synthetic resin that is removably disposed on the upper surface of the mounting base 4 by bayonet engagement, and has an open upper surface and a cylindrical protrusion 12 rising approximately in the center of the bottom surface, and has a cylindrical protrusion 12 formed on one side of the bottom surface. A knob 13 is formed in the portion. The knob 13 is hollow, and forms a discharge hole 18 facing the upper opening of the decanter 5, and the lower case 11
communicates with the inside of. The inside of the knob 13 is constantly pressed by a spring 51 to open the discharge hole 1.
An opening/closing valve 52 is provided for liquid-tightly closing the decanter 5. This opening/closing valve 52 moves up and down around a shaft 53, and as shown in FIG.
When placed on the mounting portion 6, the lid 9 pushes up the pressing piece 54 of the on-off valve 52 to open the discharge hole 18, and the discharge hole 18 faces the notch 55 of the lid 9. That's what I do. A lower case 1 located around the lower part of the protrusion 12
The inner bottom surface of 1 is slightly protruded upward to form a protruding step portion 5.
6, and the inner bottom surface of the lower case 11 is formed to be sloped low toward the discharge hole 18. That is, as shown in FIG. 3, when the lower case 11 is placed on the upper surface of the table T, the discharge hole 18 is located at the lowest position.

Reference numeral 14 denotes a filter that can be attached to and removed from the lower case 11, and its bottom surface is placed on the protruding step portion 56.The filter 14 has a cylindrical shape as a whole and has a cylindrical shape approximately in the center of the bottom surface that covers the protruding portion 12 from the periphery. The cylindrical portion 15 is formed in an upright manner, and the upper end portion of the cylindrical portion 15 is formed lower than the protruding portion 12, and the cylindrical portion 15 is formed into a square portion as shown. The bottom and side surfaces of the filter 14 are mesh-shaped;
Reinforcing crosspieces 16 are provided radially and in the vertical direction at various locations. A wide band-shaped partition 58 is integrally formed with the crosspiece 16 at the lower part of the circumferential side of the filter 14 to prevent coffee liquid from escaping from the mesh on the circumferential side of the filter 14.

Reference numeral 17 denotes a cylindrical upper case made of synthetic resin that is attached to and detached from the upper surface of the lower case 11, and inside thereof is a bottomed cylindrical metal (for example, stainless steel) case.
A sieve plate 20 is inserted and fitted. This sieve plate 20 is formed by drawing, and has a large number of through holes 19 bored in its bottom surface 20a, and engaging protrusions 20c formed at appropriate positions on the upper part of the outer wall of the peripheral side surface 20b. It is fitted and fixed into an engagement hole (not shown) formed at a proper position on the inner wall of 17. Then, around the bottom part 20a of the sieve plate 20 (at the boundary between the bottom part 20a and the circumferential side part 20b), an inclined part 20d which is inclined toward the through hole 19 is formed, and the center is slightly bulged upward. It is tightened to form a bulge 23, and an insertion hole 24 is formed in the center of the bulge 23, and a plurality of locking holes 25 are formed around the insertion hole 24. Reference numeral 22 denotes a cover plate that covers the upper opening of the case 17, and forms the suction hole 21.

Reference numeral 26 denotes a diffusion gutter which is attached to and detached from the lower surface of the upper case 17, and includes a circular water collecting part 27, four water sprinkling parts 28 extending radially from the water collecting part 27, and an approximately L-shaped hollow part. and a mounting portion 29. A cylindrical mounting portion 30 is formed in the water collecting portion 27, and four locking pawls 31 are formed at the upper end of the mounting cylinder portion 30 to engage with the locking hole 25. A water sprinkling hole 32 is bored in the water sprinkling section 28 . The mounting cylindrical portion 30 forms a through hole 33 . Reference numeral 34 denotes a cutter rotatably disposed within the upper case 17, and a mounting base 35 into which the cutter 34 is inserted is inserted into the locking hole 25.
The mounting base 3 is formed larger than the installation position of the mounting base 3.
An elongated upper joint 36 integrally connected to the bulge 5 in the vertical direction is rotatably attached to the bulge 23 via a washer or the like. Said lower joint 1
0 and the upper joint 36 can be freely engaged and detached. A notch 37 is formed at the upper edge of the lower case 11 to allow the attachment portion 29 of the diffusion gutter 26 to escape. With the diffusion gutter 26 attached to the lower surface of the upper case 17, the sieve plate 20 facing the diffusion gutter 26 serves as a blind portion. 39 has one end attached to the tank 2 via a check valve 40, the middle part wrapped around the heater 7, and the other end erected along the tank 2 to face the outside. The other end of the hot water supply pipe is configured to face the hollow mounting portion 29 of the diffusion gutter 26 .

60 is a hinge part 61 provided at the upper part of the main body 1
This is an outer lid that can be opened and closed at different times to cover the upper opening of the water tank 2 and the upper surface of the upper case 17. Further, the sieve plate 20 has a flange formed at the upper opening edge thereof, and an annular step portion is formed at the upper part of the inner wall of the upper case 17, and the sieve plate 20 is connected to the upper case 17 by engaging the flange with the step portion. It may be inserted and fitted inside.

Reference numeral 63 denotes a power cord, which is drawn out from the tank mounting portion 64 of the water tank 2 via a cord bush 65 to form a cord bush 66 . This drain section 66 has a dome shape and separates the water flowing down into the left and right sides. It is a connection terminal plate with 90 lead wires, and is disposed near the water tank 2 together with electrical parts such as a power supply contact 75, which will be described later, to prevent the influence of heat from the heater 7.

Next, 70 is a knob for setting the operation of the timer motor 71, 72 is a mill indicator lamp that indicates when the mill is in operation, 73 is a drip indicator lamp that indicates that drip operation is in progress, and 74 is a power switch, which has a power contact 75. are doing. To explain the electric circuit, the power supply contact 75, the timer motor 71, and a first contact 77 interlocked with the timer motor 71 are connected in series to a commercial AC power supply 76. 78
is a second motor which is linked to the operation of the timer motor 71.
The mill motor 3 and mill indicator lamp 72 are connected to the contact a side, and the heater 7, drip indicator lamp 73, and automatic reversing type bimetal thermostat 80 are connected to the contact b side. Then, when 20 seconds have passed since the timer motor 71 was energized (this time corresponds to the time required to grind coffee beans for about 10 people), the first contact 77 is opened and the second contact is opened.
The contact 78 is set to switch from contact a to contact b. When the knob 70 is rotated to the "mil" position, the first contact 77 is closed, the second contact 78 is connected to the contact a side, and the 20
After seconds have elapsed, it rotates to the "drip" position and maintains that position even when keeping warm after dripping.

To explain the operation of such a configuration, for example, when it is desired to obtain coffee liquid for five people, water for five people is stored in the water tank 2 and coffee beans for five people are stored in the upper case 17, and then After that, turn the knob 70 to the "mil" position and turn on the power switch 74.
This can be achieved by doing. Then, the coffee beans are crushed into coffee powder, which tends to remain around the inner bottom of the sieve plate 17 due to centrifugal force, but this coffee powder is smoothly moved along the inclined surface of the inclined surface portion 20d of the sieve plate 17. It is guided through the through holes 19 and falls and accumulates on the filter 14. Then, by the time the cutter 34 rotation time for five people has passed (approximately 10 seconds), all of the ground coffee powder has been accumulated on the filter 14, but the cutter 34 remains idle until 20 seconds have passed. Incidentally, at this time, the mil display lamp 72 is lit.

After 20 seconds have elapsed, the first contact 77 is opened, the second contact 78 is switched to the contact b side, the heater 7 is energized, and the drip indicator lamp 73 is turned on.

The water in the water tank 2 undergoes heat exchange with the heater 7 to become hot water, which is dripped onto the accumulated coffee powder from the diffusion gutter 26, filtered by the filter 14, and becomes coffee liquid, which is sent to the on-off valve 52. The water is stored in the decanter 5 through the discharge hole 18 which is opened. During the extraction of this coffee liquid, the hot water dripping onto the coffee grounds tries to escape through the mesh on the peripheral side of the filter 14 without being filtered, but is blocked by the band-shaped partition 58, and the coffee grounds are blocked. It is forcibly filtered and reliably guided to the discharge hole 18 through the mesh on the bottom surface of the filter 14.

When the water in the water tank 2 runs out, the thermostat 80 attached to the bottom of the heater 7 operates to stop the power supply to the heater 7, and after that, the thermostat 80 is opened and closed to maintain heat. This will be transferred.

(g) Effects of the invention Since the present invention is constructed as described above,
Coffee powder, which is ground from coffee beans with a cutter, is efficiently accumulated on the filter below through the holes, with almost no residual accumulation, promoted by the inclined guide by the reduced slope portion of the sieve plate.

[Brief explanation of the drawing]

Figure 1 is a front view of the coffee brewer of the present invention, Figure 2 is a front view of the coffee brewer of the invention;
The figure is a schematic cross-sectional view of the same, Figure 3 is a cross-sectional view when the upper case is engaged with the lower case and placed on the table, Figure 4 is a top perspective view of the lower case, and Figure 5 is the figure 3. FIG. 6 is a partially cutaway perspective view of the upper case, FIG. 7 is a perspective view of the diffusion gutter, and FIG. 8 is a partially cutaway schematic perspective view of FIG. 1. FIG. 9 is an electrical circuit diagram. 11...Lower case, 14...Filter, 1
7... Upper case, 20... Sieve plate, 19... Through hole, 20d... Inclined surface portion.

Claims (1)

[Claims] 1. A machine body equipped with a motor, a lower case that is attached to and detached from the machine body and has a filter inside, a cutter that is driven by the motor to grind coffee beans, and a metal sieve plate that causes the ground coffee powder to fall into the lower case. and a heating device that heats water led from a water tank provided in the machine body and supplies hot water to the lower case, and the sieve plate is formed into a bottomed cylindrical shape by drawing,
A coffee boiler characterized in that the bottom face is provided with a through hole for sieving coffee powder, and around the bottom face is formed an inclined surface portion that slopes toward the through hole.