Coffee bean roaster

Abstract

To solve problems that conventional coffee roasters cannot roast coffee beans well uniformly and that they may get somewhat defective if they are used for a long time.SOLUTION: There is provided a roaster for coffee beans in which: an inner frame including two circular axes and two rotary rolls on both the right and left sides is disposed in an outer frame which is placed low on a left side thereof and high on a right side thereof; a cylindrical can including a bottom wall which has big insertion holes at the central part is disposed on the rotary rolls; protrusions of a shaft are inserted into the insertion holes and a heater is disposed on the outer frame; a rotary roll is disposed at a rear end of the shaft; and a belt is disposed between the rotary roll and a rotary roll of an electric motor.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] This invention relates to a coffee bean roaster. In particular, the present invention relates to a coffee bean roaster having a structure that allows the coffee beans to be roasted uniformly and well. [Background technology]

[0002] Conventional coffee bean roasters include roasters that place coffee beans in a fixed glass tube (see Patent Document 1, JP-A-4-23976 and JP-A-57-25593).

[0003] However, the roasting machines described in these patent publications had the disadvantage that it was somewhat difficult to roast evenly because the roaster was a fixed container such as a glass tube that did not rotate. [Prior art documents] Patent technical literature: JP-A-4-23976 Practical technical literature: Published practical application: Showa-57-25593 Summary of the Invention

[0004] Problem to be solved by the invention

[0005] The present invention aims to solve the above-mentioned problems and to roast coffee beans uniformly and stably for a long period of time.

[0006] An inner frame 2 is provided on the outer frame, with the left side lower and the right side higher. Two circular shafts and rotating rolls are provided on each of the left and right sides of the center of this inner frame. On these four rotating rolls, a number of slightly large insertion holes are made in the center of the bottom wall of the cylindrical can, and a number of small holes are made at intervals around them. A lid with a circular opening with a smaller tip is placed on the top of the cylindrical can. A number of protrusions are inserted into the tip of the shaft in a number of relatively large insertion holes provided in the center of the bottom wall of the cylindrical can, a high temperature heater is provided on the outer frame at the lower left of the cylindrical can, a rotating roll is provided on the rear end of the shaft, and a belt is provided between this rotating roll and the rotating roll of the electric motor.

[0007] The first invention of the coffee bean roaster of this invention comprises an outer frame, an inner frame 2 with the left side lower and the right side higher, and two circular shafts and rotating rolls provided at two positions on the left, right and left sides of the center of the inner frame, and a cylindrical can is placed on top of the four rotating rolls, with a plurality of slightly large insertion holes provided in the center of the bottom wall and a number of small holes provided at intervals around the holes, and a lid having a circular opening with a smaller tip is placed on the top of the cylindrical can, and a lid having a circular opening with a smaller tip is placed on the bottom of the cylindrical can. This coffee bean roaster has several protrusions inserted into the tip of the shaft in several rather large insertion holes provided in the center of the wall, a high-temperature heater installed on the outer frame at the lower left of the cylindrical can, and a rotating roll installed at the rear end of the shaft with a belt installed between the rotating roll and the rotating roll of an electric motor.As a result, the coffee beans placed in the cylindrical can of the roaster are rotated well in an oblique direction as the cylindrical can rotates, allowing the coffee beans to be roasted almost uniformly and well. Furthermore, when putting coffee beans into the cylindrical can, the lid can be turned upside down to make it wider, so that the beans can be put into the cylindrical can through the wide opening, and after roasting, the coffee beans can be easily taken out of the cylindrical can by removing the lid, and thereafter, the cylindrical can and the lid can be easily stored in the designated position because the lid can be turned upside down to make it smaller and fit into the large hole of the cylindrical can.

[0008] The invention of claim 2 of the coffee bean roaster of this invention has a horizontal inner frame set into a rectangular outer frame, and circular shafts and rotating rolls are provided in two places on the left and right sides of the center of this inner frame, and a cylindrical can is placed on top of these four rotating rolls, with several slightly large insertion holes provided in the center of the bottom wall and several small holes provided at intervals around them, and a lid with a circular opening that is wider at the right side and narrower at the tip is placed on the right side of the cylindrical can. The tip of the shaft is fitted with several protrusions which are inserted into several rather large insertion holes provided in the centre of the bottom wall of the cylindrical can, a high temperature heater is provided on the outer frame at the lower left of the cylindrical can, and a rotating roll is provided at the rear end of the shaft. A belt is provided between this rotating roll and the rotating roll of an electric motor in this coffee bean roasting machine, so that the coffee beans placed in the cylindrical can of the roaster are rotated well in the circumferential direction as the cylindrical can rotates, allowing the coffee beans to be roasted almost uniformly and well. Furthermore, when putting coffee beans into the cylindrical can, the lid can be turned upside down and the beans can be put into the cylindrical can through the wide lid, and after roasting, the beans can be easily taken out of the cylindrical can by removing the lid, and after that, the lid can be turned upside down and made small so that the cylindrical can and lid can be easily stored in their designated positions in the hole in the cylindrical can.

[0009] Claim 3 of the coffee bean roaster of this invention provides that the cylindrical can has anti-burn plates at the lower left and right corners of the cylindrical can, so that the coffee beans can be prevented from burning at these points.

[0010] Claim 4 of the coffee bean roaster of this invention states that the cylindrical can has a wire mesh installed from the upper right to the lower left of the cylindrical can, so that the coffee beans can be well stirred by the wire mesh, thereby enabling the coffee beans to be roasted well and uniformly and producing well roasted coffee beans. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a front view of the first coffee bean roaster. [Diagram 2] FIG. 2 is a plan view of an inner frame to be attached to a first outer frame. [Diagram 3] FIG. 2 is an enlarged cross-sectional view of the gas heater. [Figure 4] FIG. [Diagram 5] FIG. 2 is a front view of the second coffee bean roaster. [Figure 6] FIG. 2 is a plan view of the inner frame to be attached to the second outer frame. [Figure 7]FIG. 11 is a cross-sectional view of a third cylindrical can. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS EXAMPLES

[0012] As shown in Figure 1, an inner frame 2 which is lower on the left side and higher on the right side is provided on a rectangular outer frame 1, and two circular shafts 3 and rotating rolls 4 are provided at two locations on the left, right, and right sides of the center of this inner frame. A cylindrical can 5 which has six rather large insertion holes 6 in the center of the bottom wall and numerous small holes 7 around it is placed on top of these four rotating rolls, as shown in Figure 4. The top of this cylindrical can is covered with a lid 8 having a circular opening 8' with a narrowed tip. Six protrusions 10 are inserted into the tips of shafts 9 into six rather large insertion holes 6 provided in the center of the bottom wall of the cylindrical can, and a gas pipe heater 11 having a small hole 11' at the top as shown in Figure 3 is provided on the outer frame at the lower left of the cylindrical can. Furthermore, a rotating roll 12 is provided at the rear end of the shaft, and a belt 15 is provided between this rotating roll and a rotating roll 14 of an electric motor 13 to rotate the cylindrical can, thereby forming a coffee bean roasting machine. EXAMPLES

[0013] As shown in FIG. 5, a rectangular horizontally elongated outer frame 21 has circular shafts 23 and rotating rolls 24 spaced apart from each other at two locations on the upper and lower sides of the center of a rectangular horizontal inner frame 22 shown in FIG. 6. As in Example 1, a number of slightly larger insertion holes are provided on these four rotating rolls, and a number of smaller holes are provided at intervals around them, and the top of the cylindrical can is covered with a lid 28 having an opening 28' that is wider and narrower at the tip. A number of protrusions 30 are inserted into the tip of a shaft 30 through a number of relatively large insertion holes 26 provided in the center of the bottom wall of the cylindrical can, and an electric heater 11 is provided on the outer frame at the lower left of the cylindrical can as shown in FIG. Furthermore, a rotating roll 29 is provided at the rear end of this shaft, and a belt 35 is provided between this rotating roll and a rotating roll 34 of an electric motor 33 to rotate the cylindrical can, thereby forming a coffee bean roaster. EXAMPLES

[0014] As shown in FIG. 7, this is a coffee bean roaster according to claim 1 or 2, in which triangular plates 43 for preventing the coffee beans from burning are provided obliquely at both corners of the bottom wall of the cylindrical can. EXAMPLES

[0015] As shown in FIG. 7, this is the coffee bean roaster of claim 1 or claim 2, in which a cylindrical can 41 of the coffee bean roaster is provided with a large triangular wire mesh 42 from the right side to the left side of the inside of the cylindrical can. [Industrial Applicability]

[0016] This invention can roast coffee beans in large quantities and anyone can use this roaster, so it can contribute to the development of the coffee bean industry.

Claims

1. A coffee bean roaster comprising an outer frame 1, an inner frame 2 lowered on the left side and higher on the right side, two circular shafts 3 and a rotating roll 4 provided at two positions on the left and right sides of the center of the inner frame, a cylindrical can 5 having a plurality of slightly large insertion holes 6 provided at the center of the bottom wall of the cylindrical can 5 on top of the four rotating rolls, a lid 8 having a circular opening 8' with a smaller tip is placed on the top of the cylindrical can, a shaft 9 has a plurality of projections 10 inserted at the tip thereof into the plurality of slightly large insertion holes 6 provided at the center of the bottom wall of the cylindrical can, a high-temperature heater 11 is provided on the outer frame at the lower left of the cylindrical can, a rotating roll 12 is provided at the rear end of the shaft, and a belt 15 is provided between the rotating rolls and a rotating roll 14 of an electric motor 13.

2. A coffee bean roaster comprising a rectangular outer frame 21 and an inner frame 22 extending horizontally, a circular shaft 23 and a rotating roll 24 provided at two positions on the left and right sides of the center of the inner frame, a cylindrical can 25 having a plurality of slightly large insertion holes 26 provided at the center of the bottom wall of the cylindrical can 25 on the four rotating rolls, a plurality of small holes 27 provided at intervals around the insertion holes 26, a lid 28 having a circular opening 28' with a larger width on the right side of the cylindrical can and a smaller tip, a shaft 29 having a plurality of projections 30 inserted at the tip thereof into the plurality of slightly large insertion holes 26 provided at the center of the bottom wall of the cylindrical can, a high-temperature heater 31 provided on the outer frame at the lower left of the cylindrical can, a rotating roll 32 provided at the rear end of the shaft, and a belt 35 provided between the rotating roll and a rotating roll 34 of an electric motor 33.

3. 3. The coffee bean roaster according to claim 1 or 2, wherein the cylindrical can has anti-sticking plates for the coffee beans provided at all corners of the inside of the cylindrical can.

4. 3. The coffee bean roaster according to claim 1, wherein the cylindrical can has a wire mesh provided on the inside of the cylindrical can from the upper right to the lower left.

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