WO2005082177A1

WO2005082177A1 - Roasting apparatus

Info

Publication number: WO2005082177A1
Application number: PCT/JP2005/003179
Authority: WO
Inventors: Hitoshi Nakagawa
Original assignee: Gouen Corporation
Priority date: 2004-03-01
Filing date: 2005-02-25
Publication date: 2005-09-09
Also published as: JP3770615B2; JP2005245206A

Abstract

[PROBLEMS] To provide an easily manufacturable, low cost, and small-sized roasting apparatus. [MEANS FOR SOLVING PROBLEMS] This roasting apparatus (10) for roasting a roasted object while rotating a rotary drum (14) with the roasted object carried in the cylindrical rotary drum (14) placed horizontally comprises the rotary drum (14). The rotary drum (14) further comprises an opening part (23) formed at one end of a rotary drum (14) body for carrying in and out the roasted object, a tapered part (20) diverged from the opening part (23) to the other end of the rotary drum (14) body, a guide member (22) installed on the inner wall of the tapered part (20) and guiding the carrying-out of the roasted object, and a spiral agitating material (18) installed on the inner wall of the rotary drum (14) body and extending from the guide member (22) to the other end of the rotary drum (14) body. The guide member (22) is installed in such a manner that, for example, each of the parallel sides of a trapezoidal plate is rounded to be formed in a curved shape and the longer side of the parallel sides is positioned at the tip of the tapered part (20).

Description

Specification

Roasting equipment

Technical field

The present invention relates to a roasting apparatus, and more particularly to a home roasting apparatus for coffee beans.

Background art

Conventionally, Patent Document 1 describes a roasting device that can roast a roasted product evenly and that can easily remove the roasted product after roasting. This roasting device includes a rotatable drum provided on the inner surface thereof with a horizontal stirring member extending along a rotation axis direction and a stirring member having an inclined stirring member extending along a direction inclined with respect to the rotation axis direction. Sometimes, the coffee beans contained in the rotating drum are stirred while being pushed in the direction of rotation by a horizontal stirring member according to the rotation of the rotating drum, while after roasting, the roasted coffee beans in the rotating drum 7 are roasted. In accordance with the rotation of the rotating drum in the direction opposite to the roasting direction, the inclined stirring member discharges the rotating drum to the other end while approaching one end of the rotating drum.

[0003] In this roasting apparatus, a beans input guide member is provided above the rotating drum, and a bean outlet is provided below the rotating drum. The coffee beans put into the bean feeding guide member are roasted by radiant heat from the far-infrared radiating material while being stirred by the horizontal stirring member by rotating the rotating drum. After roasting is completed, rotate the rotating drum in the reverse direction to take out coffee beans from the bean outlet.

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2001-333756

Disclosure of the invention

Problems to be solved by the invention

[0005] However, the roasting device described in Patent Document 1 requires a horizontal stirring member for stirring coffee beans and an inclined stirring member for taking out coffee beans. Therefore, the production of the rotating drum is troublesome, and it is difficult to reduce the material cost. Therefore, in particular, they could not be used easily at home.

[0006] In addition, the roasting device described in Patent Document 1 has a large space space and a large-sized roasting device because a bean input guide member and a bean discharge port are formed respectively. Can't deny . If the miniaturization of the equipment is realized, roasting of coffee beans at home is possible, and it is possible to drink coffee using coffee beans that have not been oxidized.

[0007] Therefore, an object of the present invention is to provide a small-sized roasting apparatus which is easy to manufacture, inexpensive, and small.

Means for solving the problem

[0008] In order to solve the above-mentioned problems, the present invention provides a roasting method in which a roasting target is carried into a rotatable rotary drum in a state where the roasting target is carried into an inverted cylindrical rotary drum. An apparatus, wherein the rotary drum is formed at one end of a rotary drum main body, and has an opening for carrying in and out the roasting target, and expands from the opening toward the other end of the rotary drum main body. (F) a taper portion, a guide member attached to the inner wall of the taper portion and guiding the roasting target to be carried out, and a net portion located between one end of the rotary drum main body and the other end of the rotary drum main body. A spiral stirring member attached to the inner wall of the net portion and extending toward the other end of the guide member.

[0009] For this reason, the roasting drum can be manufactured without a special device, so that the manufacturing cost is reduced and the roasting device is inexpensive and does not take up space for loading and unloading the roasting target. Can be provided.

[0010] The guide member is mounted, for example, by rounding each of the parallel sides of the trapezoidal plate in a curved shape, and setting the long side of the parallel side to the tip side of the tapered portion. In addition, it is preferable that the guide member is inclined about 15 degrees with respect to the tapered portion, and that the parallel surface is inclined and connected in a direction perpendicular to the stirring member, so that the roasting target can be further carried out.

[0011] It is preferable that an inclination angle of the tapered portion is in a range of 20 degrees to 25 degrees with respect to a rotation axis of the rotating drum.

[0012] The mesh portion has a plurality of stainless wires orthogonal to each other so that the size of each opening is smaller than that of the object to be roasted. Each opening of the net portion is preferably about 3 mm to 4 mm, since it is possible to prevent the roasting object such as coffee beans, corn, and ginkgo from coming out of the rotating drum through the opening. When the roasting target is smaller than these, a fine mesh may be used, and when the roasting target is larger than the above, a coarse mesh may be used. [0013] The rotary drum is made of stainless steel or the like from the viewpoint of safety of food to be roasted.

The rotating drum has a rotation speed of 30 rpm and a diameter of 75 mm to 90 mm. The heating means for roasting the object to be roasted has an electric power of 300 W to 400 W and a diameter of 10 mm to 15 mm. Preferably, the central axis of the heating means is positioned 40 mm-55 mm downward from the central axis of the rotary drum, and 30 mm-45 mm in the horizontal direction and forward in the rotational direction. In this case, the size and the amount of power that can be sufficiently used for home use can be realized. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a roasting apparatus 10 according to an embodiment of the present invention. The roasting apparatus 10 shown in FIG. 1 includes a rotating drum 14 placed almost horizontally, a rod-shaped heater 26 located below the rotating drum 14, and a motor 42 capable of rotating the rotating drum 14 bidirectionally. They are roughly classified.

The rotary drum 14 has a cylindrical shape with a length a of about 90 mm to 120 mm (118 mm in this embodiment) and a diameter b of about 75 mm to 90 mm (83 mm in this embodiment). The rotating drum 14 is also made of stainless steel such as SUS304. At one end of the rotating drum 14, a taper portion 20 having an inclination of 20 ° to 30 ° (22 ° in the present embodiment) with respect to the horizontal direction and a length of about 30 mm to 40 mm (35 mm in the present embodiment) is provided. Form. The other end of the rotating drum 14 has a disk-shaped bottom 21 having a length of about 6 mm. A central portion of the rotary drum 14 is formed with a net portion 16 which is woven with a stainless wire of about 0.8 mZm (refer to symbol C) so that each opening is, for example, 3 mm to 4 mm (see symbol C).

The opening 23 of the tapered portion 20 has a diameter of, for example, 53 mm to 55 mm (54 mm in the present embodiment). The opening 23 allows both carrying in and out of coffee beans and the like.

[0019] The net portion 16 may be formed so that a stainless steel wire is arranged in the horizontal or vertical direction with respect to the bottom portion 21, or may be arranged obliquely by, for example, about 45 °. However, the latter is preferable in that the coffee beans and the like easily rotate when the rotary drum 14 rotates.

[0020] A stirrer 18 having a diameter of about 3 mm, which is also a stainless steel rod, is spirally provided inside the mesh portion 16. Are arranged. Stirrer 18 has one end located at or near bottom 21, is wound in a strong spiral around net 16, and the other end is located slightly ahead of the boundary between net 16 and taper 20.

The other end of the stirrer 18 is attached to a first surface of a guiding unit 22 for guiding coffee beans or the like to be carried out. The second surface of the guiding section 22 is attached to the inner wall of the tapered section 20. The guide portion 22 is formed by rolling a trapezoidal stainless plate as described later.

One end of a connecting member 24 for connection to the motor 42 is connected to the center of the bottom 21. The other end of the connecting member 24 is housed in the mounting member 28 of the motor 42 via the heat insulating plate 12 separating the rotating drum 14 side and the motor 42 side.

By providing the heat insulating plate 12, radiant heat from the heater 26 is prevented from being transmitted to the motor 42, and coffee beans and the like can be roasted efficiently. For this reason, the heat insulating plate 12 is formed with a through hole having a size necessary and sufficient for passing the connecting member 24. Preferably, the connecting member 24 also has a heat insulating material strength.

The mounting member 28 of the motor 42 includes, for example, a first portion 28a having an arch shape for accommodating the other end of the connecting member 24, and a rectangular second portion that also extends horizontally at the bottom of the first portion 28a. 28b, and a third portion 28c extending upward at the end side of the second portion 28b. The mounting member 28 is made of a force such as iron.

[0025] The first portion 28a has a first through-hole having a size substantially equal to that of the through-hole of the heat insulating plate 12, in which an oilless bush 32 having a free end at an upper portion, for example, is formed. Will be accommodated. Further, for example, a screw hole for receiving one or more screws 38 for connecting the mounting member 28 and the heat insulating plate 12 is formed in an upper portion of the first through hole, for example.

[0026] The second portion 28b is provided with one or more openings 30 in order to reduce the weight of the mounting member 28 and improve heat dissipation efficiency.

The third portion 28c has substantially the same shape as the first portion 28a, and has a second through-hole through which the motor shaft 36 of the motor 42 passes. In addition, a screw hole for receiving one or more screws 40 connecting the mounting member 28 and the motor 42 is formed, for example, in an upper portion of the second through hole.

[0028] Inside the oilless bush 32, the other end of the connecting member 24 and the tip of the motor shaft 36 are attached. And the shaft 34 is accommodated. In order to rotate the rotary drum 14 efficiently by driving the motor 42, the shaft 34 and the connecting member 24 are slightly eccentric in the oilless bush 32. Shaft runout due to eccentricity is absorbed by the open end of the oilless bush 32. Further, in order to prevent transmission to the thermal power motor 42 on the rotary drum 14 side, in the present embodiment, for example, a slit portion is formed on the motor shaft 36 side of the shaft 34, and the shaft 34 side of the motor shaft 36 is formed on the shaft 34 side. A shape corresponding to the inside of the slit portion is used to reduce the number of these contact surfaces. For example, the shaft 34 is shaped like, for example, the tip of a flathead screwdriver, and the motor shaft 36 is shaped like a screw head for a flathead screwdriver. An opening perpendicular to the axial direction of the shaft 34 may be provided at the tip of the shaft 34, and a split pin or the like corresponding to the slit may be inserted into the opening.

Here, the rotation speed of the rotary drum 14 is, for example, 30 rpm. The motor 42 is electrically connected to a motor switch 46 for switching the rotating direction of the rotating drum 14 through a wiring 44. The motor switch 46 is provided with a knob 46c.

The knob 46c may be switched to, for example, the area 46a when roasting coffee beans or the like, or may be switched to, for example, the area 46b when transporting coffee beans or the like. To stop the driving of the motor 42, the knob 46c may be switched between the areas 46a and 46b. The motor switch 46 is actually attached to the side of the casing of the roasting device 10 or the like.

A heater switch 50 for switching on / off of the heater 26 is mounted near the mounting position of the motor switch 46. The heater switch 50 has a timer function so that the heater 26 is turned on and then turned off, for example, in 15 minutes.

[0032] The heater switch 50 is provided with a bell or the like for notifying that the heater 26 has been turned off. The heater switch 50 is electrically connected to the heater 26 via the wiring 52.

Here, the heater 26 is, for example, an electric heating tube such as a glass tube of 110 V at 300 W to 400 W, a ceramic tube, a far-infrared tube, or the like, and a gas heater having a similar thermal power to these. The diameter of the heater 26 is, for example, 10φ−15φ (14φ in the present embodiment). When such a heater 26 is used, radiant heat of about 280 ° C to 300 ° C is obtained.

[0034] Alternatively, smoke generated during roasting of coffee beans or the like is selectively removed above the rotating drum 14. For this purpose, a powerful smoke removing material 48 such as activated carbon may be provided. Further, optionally, a lower portion of the rotating drum 14 may be provided with a chaff receiving portion 54 for receiving a coffee bean chaff generated during roasting of coffee beans. The chaff receiving portion 54 may be of a drawer type and detachable from the roasting device 10 body.

It is preferable that the housing of the roasting apparatus 10 be detachable near the heat insulating plate 12 so that the rotary drum 14 and the like can be tarry. Furthermore, for example, if the connecting member 24 has a double structure and is connected to each other by pins or the like, the rotatable drum 14 can be attached to and detached from the roasting apparatus 10, so that cleaning can be performed more easily. More preferred.

[0036] Further, the casing of the roasting apparatus 10 is internally screwed or the like to reduce external irregularities. In addition, this housing has a double structure of a stainless steel plate or the like, and the surface of the housing becomes hot. The upper part of the housing is provided with an exhaust port for exhausting smoke generated during roasting.

[0037] Further, the opening 23 side of this housing is not so spaced from the opening 23 so that the force of the rotating coffee drum 14 brought in from the opening 23 does not fall off. In addition, near the opening 23 of the housing, a door for carrying in and out coffee beans slightly larger than the opening 23 is provided.

FIG. 2 is a diagram of the heater 26 and the rotating drum 14 shown in FIG. 1 as viewed from the axial direction. As described above, in the present embodiment, the rotation speed of the rotating drum 14 is, for example, 30 rpm. The heater 26 is, for example, an electric heating tube of 110V and 300W-400W. The diameter of the rotating drum 14 is set to 80 mm. The rotatable drum 14 rotates clockwise in FIG. 2 during roasting.

Under this condition, a preferable positional relationship between the rotary drum 14 and the heater 26 is that the central axial force of the heater 26 is at the lower left position with respect to the central axis of the rotary drum 14. The horizontal length c between the central axis of the heater 26 and the central axis of the rotary drum 14 is, for example, 30 mm-45 mm (in this embodiment, 35 mm using a heater 26 of 300 W). In addition, the length d in the vertical direction is, for example, 40 mm to 55 mm (in this embodiment, 45 mm using a heater 26 of 300 W).

[0040] In order to roast the coffee beans brought into the rotating drum 14, the rotating drum 14 is rotated clockwise in FIG. , Coffee beans gather in the lower left direction in the rotating drum 14. For this reason, coffee beans can be roasted efficiently.

[0041] Actually, about three times the cup of coffee is made according to the rotation speed of the rotary drum 14, the wattage of the heater 26, the size of the rotary drum 14, and the positional relationship between the heater 26 and the rotary drum 14. After roasting the required coffee beans, the roasting was completed without uneven roasting.

[0042] Further, by setting the central axial force of the heater 26 at the lower left position with respect to the central axis of the rotating drum 14, the coffee bean chaff generated during roasting of the coffee beans falls and the heater 1 Adhesion to 26 is reduced.

[0043] For this reason, it is possible to prevent the chaff attached to the heater 26 from burning and generating unnecessary smoke. In addition, since the chaff does not easily adhere to the heater 26, the cleaning of the heater 26 becomes easy.

FIG. 3A is a schematic perspective view of the rotating drum 14 shown in FIG. FIG. 3B is a plan view showing a state where the guiding portion 22 is expanded. The guide portion 22 is formed by, for example, processing a stainless steel plate of 30 mm × 52 mm into a trapezoidal shape and rounding it in such a manner that the longitudinal side of the force becomes an axis.

Specifically, a 30 mm × 52 mm stainless plate (0.5 mm thick) is cut into a shape as shown in FIG. 3B by cutting or the like. The length f and the length 1 are, for example, as follows. Length f is 30mm, length g is 16mm, length h is 2mm, length i is 5mm, length j is 10mm, length k is 12mm, and length 1 is 52mm. In this case, the angle a is about 40 ° and the angle 13 is about 60 °. As shown in FIG. 3 (a), the guide portion 22 is rounded with the second side 22b as a base line using a press, for example, so that the distance e between the corners on the bottom side is, for example, 10 mm to 20 mm. Just do it.

[0046] The first side 22a located on the opening 23 side is longer than the opposing third side 22c. Further, the fourth side 22d, which is the side connected to the tapered portion 20, has a relatively obtuse angle, and the opposing second side 22b has a relatively acute angle. The guide portion 22 is connected to the inner wall of the tapered portion 20 with the first side 22a facing the opening portion 23 with a clockwise shift of about 15 ° to 40 ° (36 ° in the present embodiment).

When the guiding unit 22 is connected to the rotating drum 14 under the above conditions, the third side 2 of the guiding unit 22 2c and the opening 23 are located on the same plane. With such a connection mode, all the coffee beans can be taken out of the rotary drum 14.

Next, a method of roasting coffee beans by the roasting apparatus 10 shown in FIG. 1 will be described. First, the door of the housing is opened, and a required amount of coffee beans and the like are carried into the rotating drum 14 through the opening 23. Then close the door. Next, the knob 46c of the motor switch 46 is switched to the 46a side, and the heater switch 50 is turned on.

[0049] Then, the motor 42 is driven, the rotating drum 14 starts rotating clockwise in FIG. 2, and the heater 26 is turned on to start heat radiation. The coffee beans and the like carried into the rotating drum 14 are repeatedly moved to the bottom 21 side by the stirring material 18 in the rotating drum 14, and return to the opening 23 side by hitting the bottom 21. Therefore, the coffee beans can be roasted by radiant heat from the heater 26 while stirring.

After about 15 minutes have passed since the start of roasting, a bell or the like provided in the heater switch 50 sounds, and the heater 26 is turned off to notify the end of roasting. Next, place the container below the door of the housing. Then, the door of the housing is opened, and the knob 46c of the motor switch 46 is switched to the 46a side force 46b side.

[0051] Then, the rotating drum 14 starts rotating counterclockwise in FIG. 2, and the roasted coffee beans and the like in the rotating drum 14 move inside the rotating drum 14 to the opening 23 side by the stirring material 18. Will come. The coffee beans and the like that have reached the guiding section 22 are carried out of the rotating drum 14 while being guided by the guiding section 22, and enter the container. By the above procedure, roasted and oxidized coffee beans can be obtained.

[0052] In addition, when a mark was actually put on any of the coffee beans to be carried into the rotary drum 14 and the mixture was stirred, the coffee beans passed between the opening 23 side and the bottom 21 side several times. It was found that it reciprocated and was sufficiently stirred.

[0053] In the present embodiment, the case of roasting coffee beans has been mainly described as an example, but the roasting target is soybean, ginkgo, corn, chestnut, wheat, Nanjing bean, sunflower seeds, watermelon seeds, and the like. You can also. Further, the dimensions and the like of the respective parts described above are based on the assumption that the roasting apparatus 10 is for home use and roasts about three cups of coffee beans. Therefore, when the roasting apparatus 10 is used for business, for example, the length a of the rotating drum 14 is increased, or the heater 26 is connected in an S-shaped continuous manner. A design change such as a curve may be performed.

Industrial applicability

[0054] It can be used for roasting coffee, soybeans, ginkgo, corn, chestnut, wheat, peas, sunflower seeds, watermelon seeds and the like.

Brief Description of Drawings

FIG. 1 is a schematic configuration diagram of a roasting apparatus 10 according to an embodiment of the present invention.

FIG. 2 is a view of a heater 26 and a rotating drum 14 shown in FIG. 1 as viewed from an axial direction.

FIG. 3 is a schematic perspective view of a rotating drum 14 shown in FIG. 1.

Explanation of symbols

[0056] 10 Roasting device

12 Insulation board

14 rotating drum

16 Net

18 Stirrer

20 Taper

21 bottom

22 Guide

23 opening

24 Connecting members

26 heater

28 Mounting member

28a first part

28b second part

28c third part

30 opening

32 Oilless bush

34 shaft

36 Motor shaft , 40 screw motor

, 52 Wiring motor switch a, 46b area c knob smoke filter heater switch chaff receiving part

Claims

The scope of the claims

[1] A roasting apparatus for roasting a roasting object while rotating the rotating drum in a state where the roasting object is carried into an inverted cylindrical rotary drum,

The rotating drum,

An opening formed at one end of the rotating drum main body for carrying in and out the roasting object;

A taper portion expanding from the opening toward the other end of the rotary drum body;

A guide member attached to the inner wall of the tapered portion and guiding the roasting target to be carried out;

A mesh portion located between one end of the rotary drum body and the other end of the rotary drum body; a spiral attached to the inner wall of the mesh portion and extending toward the other end of the rotary drum body; Stirring material,

A roasting device comprising:

[2] The guide member is characterized in that each of the parallel sides of the trapezoidal plate is rounded so as to be curved, and the long side of the parallel side is attached to the tip side of the tapered portion. The roasting device according to claim 1.

3. The roasting apparatus according to claim 1, wherein an inclination angle of the tapered portion is in a range of 20 ° to 25 ° with respect to a rotation axis of the rotary drum.

[4] The mesh according to any one of [1] to [3], wherein a plurality of stainless wires are orthogonal to each other so that the size of each opening is smaller than that of the object to be roasted. Roasting equipment.

[5] The rotating drum has a rotation speed of 30 rpm, a diameter of 75 mm-90 mm,

The heating means for roasting the object to be roasted has an electric power of 300 W to 400 W, a diameter of 10 mm to 15 mm,

The central axis of the heating means is positioned 40 mm-55 mm downward from the central axis of the rotary drum, and 30 mm-45 mm in the horizontal direction and forward of the rotational direction. The roasting device according to any of the above.

6. The rotary drum according to claim 1, wherein the rotary drum is made of stainless steel.

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