JP6937665B2 - Coffee roasting equipment - Google Patents

Description

The present invention relates to a coffee roasting apparatus.

Conventionally, there is known a coffee roasting device that heats coffee beans to a high temperature and roasts the coffee beans by supplying hot air into the roasting drum while rotating the roasting drum containing the coffee beans. .. In such a coffee roasting apparatus, the roasted coffee beans are at a high temperature. Therefore, taking out the roasted coffee beans from the roasting drum by hand (specifically, by hand wearing leather gloves) is not always a safe operation because there is a risk of burns.

Regarding this, for example, Patent Document 1 states that during roasting, the coffee beans are roasted while the coffee bean discharge holes provided in the bottom cover of the roasting drum (roasting container) containing the coffee beans are closed by a shutter. The coffee beans are roasted with hot air while rotating the drum in the forward direction, and at the end of roasting, the shutter is rotated in the reverse direction with respect to the roasting drum to open the coffee bean discharge holes and roast the coffee beans. A technique for making the beans ready to be discharged from the drum is disclosed. According to such a technique, during roasting, it is possible to roast the coffee beans with hot air while suppressing the discharge of the coffee beans from the roasting drum and rotating the roasting drum in the forward direction. At the end of roasting, the coffee beans can be discharged from the coffee bean discharge hole, so that the roasted coffee beans can be safely discharged from the roasting drum.

Japanese Unexamined Patent Publication No. 2000-279151

However, the conventional roasting apparatus exemplified in Patent Document 1 as described above realizes the roasting of the coffee beans described above by using a complicated component configuration. If the configuration of the roasting apparatus can be simplified, it is preferable that the positional relationship of each component can be easily adjusted when, for example, assembling the coffee roasting apparatus. However, until now, a coffee roasting device capable of safely roasting coffee beans with a simple structure has not been developed.

Therefore, an object of the present invention is to provide a coffee roasting apparatus capable of safely discharging roasted coffee beans from a roasting drum while simplifying the configuration.

The coffee roasting apparatus according to the present invention is arranged so as to face the back plate, a back plate, a rotation mechanism that rotates the back plate in the forward direction at the time of roasting, and the back plate in the reverse direction at the end of roasting. It has a bottom surface of the coffee beans and a side surface of the drum extending in a direction away from the back plate starting from the outer peripheral edge of the bottom surface of the drum, and at the time of roasting, the bottom surface of the drum and the side surface of the drum. Hot air is supplied to the coffee beans housed in the internal region partitioned by and, and the first engaging hole of the bottom surface of the drum engages with the protrusion of the back plate to rotate the back plate forward. The first roasting drum is displaced in a direction away from the back plate by abutting against the roasting drum that rotates forward along with the roasting and the solenoid engaging protrusion of the side surface of the roasting at the end of the roasting. The back plate includes a solenoid that disengages the engagement hole from the protrusion, and the back plate includes a back plate closing portion that closes the coffee bean discharge hole at the bottom of the drum during roasting, and the roasting portion. When the back plate rotates in the reverse direction after the first engagement hole and the protrusion are disengaged at the end of roasting, the coffee bean discharge hole is opened by communicating with the coffee bean discharge hole. The back plate opening is provided.

According to the present invention, during roasting, the coffee bean discharge hole on the bottom surface of the drum can be closed by the back plate closing portion. This prevents coffee beans from being discharged from the coffee bean discharge holes during roasting. Then, at the time of roasting, the roasting drum also rotates in the forward direction along with the forward rotation of the back plate engaged with the roasting drum, and the coffee beans can be roasted with hot air. On the other hand, at the end of roasting, the roasting drum is displaced in the direction away from the back plate by a solenoid to release the engagement between the first engaging hole of the roasting drum and the protrusion of the back plate. Then, by rotating the back plate in the reverse direction, the coffee bean discharge hole can be opened by the opening of the back plate. As a result, the coffee beans can be discharged from the coffee bean discharge hole.

As described above, according to the present invention, the simple configuration of the back plate, the rotating mechanism, the roasting drum, and the solenoid as described above is used for roasting while closing the coffee bean discharge holes of the roasting drum during roasting. Coffee beans can be roasted with hot air while rotating the roasting drum in the forward direction, and at the end of roasting, the coffee bean discharge holes can be opened so that the coffee beans can be discharged from the roasting drum. Therefore, the roasted coffee beans can be safely discharged from the roasting drum while simplifying the configuration.

FIG. 1A is a schematic perspective view of a main part of the coffee roasting apparatus according to the embodiment. FIG. 1B is a schematic front view of the coffee roasting apparatus. FIG. 2A is a schematic cross-sectional view schematically showing a cross section taken along line AA of the coffee roasting apparatus. FIG. 2B is a schematic disassembled cross-sectional view for explaining the positional relationship between the back plate, the roasting drum, and the shaft portion of the rotating mechanism. The roasting drum of FIG. 2B is shown by further simplifying the roasting drum of FIG. 2A. FIG. 3A is a schematic perspective view of the back plate. FIG. 3B is a schematic cross-sectional view for explaining a state in which the roasting drum is engaged with the back plate. FIG. 3C is an enlarged schematic enlarged cross-sectional view of a portion (C portion) in the vicinity of the fastening bolt of FIG. 3B. The roasting drum of FIG. 3B is shown by further simplifying the roasting drum of FIG. 2A. 4 (a) and 4 (b) are schematic perspective views of the roasting drum. FIG. 4C is a schematic rear view of the roasting drum. FIG. 4D is a schematic cross-sectional view schematically showing a cross section taken along line BB of the roasting drum. FIG. 5A is a schematic view showing a state before the solenoid engages with the solenoid engaging protrusion of the roasting drum. FIG. 5B is a schematic view showing a state in which the solenoid is engaged with the solenoid engaging protrusion.

Hereinafter, the coffee roasting apparatus 1 according to the embodiment of the present invention will be described with reference to the drawings. The drawings are schematically shown so that the configuration is easy to understand, and the dimensional ratios of each part on the drawings do not always match the actual ones, and the dimensional ratios between the drawings do not necessarily match. No. In the main drawings, the Cartesian coordinates of XYZ are shown for reference. This Y-axis is an axis parallel to the axis 100 of the roasting drum 60, which will be described later.

As shown in FIGS. 1 (a) and 1 (b), the coffee roasting device 1 includes a roasting main body 10, a hot air supply device 20, a rotation mechanism 30, and a solenoid 40. Further, as shown in FIGS. 2A and 2B, the coffee roasting apparatus 1 includes a back plate 50 and a roasting drum 60 arranged inside the roasting main body 10.

With reference to FIGS. 1 (a) and 1 (b), the hot air supply device 20 is a device for supplying hot air to the roasting drum 60 when roasting coffee beans. Specifically, the hot air supply device 20 according to the present embodiment includes a heater 21 and a fan 22 as an example. The operations of the heater 21 and the fan 22 are controlled by a control device (not shown) of the coffee roasting device 1. At the time of roasting, the heater 21 generates heat, and the fan 22 sends air to the heater 21. As a result, hot air is supplied to the roasting drum 60. The temperature of the hot air is not particularly limited as long as it is a temperature at which coffee beans can be roasted by the hot air, but for example, a temperature of 250 ° C. or higher may be used.

As shown in FIG. 2A, the back plate 50 and the roasting drum 60 are housed in a housing portion 11 provided inside the roasting main body portion 10. Specifically, the back plate 50 and the roasting drum 60 are housed in the accommodating portion 11 so that the axis 100 of the roasting drum 60 is inclined by α degree obliquely upward with respect to the horizontal direction.

Further, as shown in FIG. 2A, the coffee roasting apparatus 1 has a discharge port 13 for discharging the roasted coffee beans from the roasting main body 10, and a discharge port 13 for opening and closing the discharge port 13. It is provided with a discharge port lid 14. The opening / closing operation of the outlet lid 14 is controlled by the control device of the coffee roasting device 1.

Further, the coffee roasting device 1 is provided with a viewing window 12. The viewing window 12 is shown by a chain double-dashed line in FIG. 2A, and the viewing window 12 is omitted in FIG. 1 described above. The viewing window 12 is a viewing window for visually recognizing the internal region of the roasting drum 60 when roasting coffee beans, and is configured by a glass window in the present embodiment. The viewing window 12 is attached to the roasting body 10 so that it can be easily removed from the roasting body 10 of the coffee roasting device 1 (that is, it is detachably attached). As a specific example of this, the viewing window 12 according to the present embodiment is attached to the roasting main body 10 by a detachable fastening member such as a bolt.

The viewing window 12 may be, for example, an openable / closable viewing window. To give an example of this, for example, the viewing window 12 may be attached to the roasting main body 10 by a connecting member (for example, a hinge or the like) that rotatably connects the viewing window 12. In this case, the viewing window 12 opens and closes by rotating the connecting member as a rotation axis.

The rotation mechanism 30 is a mechanism for rotating the back plate 50 in the forward rotation (Fr) and the reverse rotation (Br). Specifically, the rotation mechanism 30 according to the present embodiment includes, as an example, a shaft portion 31 and a motor 32 for rotating the shaft portion 31. As shown in FIGS. 2A and 2B, the tip portion of the shaft portion 31 protruding in the −Y direction is the back plate shaft hole 52 of the back plate 50 and the drum shaft hole of the roasting drum 60. It is inserted in 66.

As shown in FIG. 2B, the back plate 50 is fastened to the shaft portion 31 of the rotation mechanism 30 by the fastening bolts 33a and the fastening bolts 33b. Specifically, the fastening bolt 33a and the fastening bolt 33b are screwed into the screw hole 35a and the screw hole 35b of the shaft portion 31 by inserting the bolt insertion hole 53a and the bolt insertion hole 53b of the back plate 50, respectively. .. In this way, the back plate 50 according to the present embodiment is connected to the shaft portion 31. As a result, the back plate 50 rotates integrally with the shaft portion 31.

On the other hand, the roasting drum 60 is not fastened to the shaft portion 31 by the fastening bolts 33a and 33b, and the back plate 50 is described later in the first engaging hole 67 (FIG. 4C) of the roasting drum 60 described later. The protruding portion 54 (FIG. 3A) is arranged on the back plate 50 so as to engage with the protruding portion 54 (FIG. 3A). For example, when the roasting drum 60 is taken out from the accommodating portion 11 in order to clean the roasting drum 60, the viewing window 12 is first removed (or opened), and then the roasting drum 60 is removed from the accommodating portion 11. Just take it out. As described above, the coffee roasting apparatus 1 according to the present embodiment has a configuration in which the roasting drum 60 can be easily taken out from the coffee roasting apparatus 1.

The motor 32 is an electric motor capable of switching between forward rotation (Fr) and reverse rotation (Br) by being controlled by the control device of the coffee roasting device 1. The control device rotates the motor 32 in the forward direction when it receives the roasting start command to start roasting the coffee beans, and the motor when it receives the roasting end command to end the roasting of the coffee beans. 32 is rotated in the reverse direction. As a result, the motor 32 and the back plate 50 rotate in the forward direction when the coffee beans are roasted, and rotate in the reverse direction when the roasting is completed.

Subsequently, the details of the back plate 50 will be described. As shown in FIGS. 3A and 3B, the back plate 50 has a back plate main body 51 having a disk shape. A back plate shaft hole 52 through which the shaft portion 31 of the rotation mechanism 30 described above is inserted is provided in the central portion of the back plate main body 51. Further, the back plate main body 51 is provided with bolt insertion holes 53a and 53b through which the above-mentioned fastening bolts 33a and 33b are inserted. As shown in FIG. 3C, in a state where the back plate 50 is fastened to the shaft portion 31 by the fastening bolts 33a and 33b, the bolt heads 34 of the fastening bolts 33a and 33b are described later in the roasting drum 60. They are arranged in the elongated holes 70a and 70b, respectively.

Further, the back plate main body 51 of the back plate 50 is provided with a protrusion 54 protruding toward the side (−Y direction side) of the drum bottom surface 61, which will be described later, of the roasting drum 60. The protrusion 54 engages with the first engaging hole 67 of the drum bottom surface 61, which will be described later, during roasting, and after the roasting, the protrusion 54 engages with the second engaging hole 68 of the drum bottom surface 61, which will be described later. Engage (FIG. 4 (c)).

Further, the back plate main body 51 includes a back plate opening 55 and a back plate closing portion 56. The back plate opening 55 is a coffee bean described later in the roasting drum 60 when the back plate 50 rotates in the reverse direction after the engagement between the first engaging hole 67 and the protrusion 54 is released at the end of roasting. This is a portion where the coffee bean discharge hole 69 is opened by communicating with the discharge hole 69 (FIG. 4). The back plate closing portion 56 is a portion that closes the coffee bean discharge hole 69 during roasting. The back plate closing portion 56 according to the present embodiment is located on the same circumference as the back plate opening portion 55 at a portion where the back plate main body portion 51 is not opened (specifically, the distance from the axis 100 is the same as the back plate opening portion 55. , A portion other than the back plate opening 55).

Subsequently, the details of the roasting drum 60 will be described. As shown in FIGS. 4A to 4D, the roasting drum 60 includes a drum bottom surface portion 61, a drum side surface portion 62, and blades 64. The drum bottom surface portion 61 is arranged on the −Y direction side of the back plate 50 so as to face the back plate 50 (see FIG. 2 described above).

The drum side surface portion 62 extends in a direction away from the back plate 50 (−Y direction) starting from the outer peripheral edge of the drum bottom surface portion 61. The drum side surface portion 62 is provided with a hot air passage hole 65 through which the hot air supplied from the hot air supply device 20 passes. When the coffee beans are roasted, the coffee beans are placed in the internal region partitioned by the drum bottom surface portion 61 and the drum side surface portion 62 of the roasting drum 60. Then, at the time of roasting, the hot air from the hot air supply device 20 passes through the hot air passage hole 65 and is supplied to the internal region. As a result, the coffee beans are roasted.

Further, the drum side surface portion 62 is provided with a solenoid engaging protrusion 63. Specifically, the solenoid engaging protrusion 63 is provided on the drum side surface portion 62 so as to project outward in the radial direction of the roasting drum 60. The function of the solenoid engaging protrusion 63 and the like will be described later with reference to FIG.

As shown in FIG. 4C, a drum shaft hole 66 is provided in the central portion of the drum bottom surface portion 61. The tip of the shaft portion 31 of the rotation mechanism 30 described above is inserted into the drum shaft hole 66.

Further, the drum bottom surface portion 61 is provided with a first engagement hole 67 which is a hole for engaging the protrusion 54 of the back plate 50. At the time of roasting, in the roasting drum 60, the protrusion 54 of the back plate 50 is engaged with the first engagement hole 67 of the bottom surface portion 61 of the drum (specifically, the protrusion 54 is first engaged). It is arranged in the accommodating portion 11 of the coffee roasting apparatus 1 (so that it fits into the hole 67). As a result, at the time of roasting, the roasting drum 60 also rotates in the forward direction as the back plate 50 rotates in the forward direction (Fr). That is, the roasting drum 60 according to the present embodiment roasts coffee beans while rotating in the forward direction during roasting.

The blade 64 of the roasting drum 60 is a member provided for stirring the coffee beans when the coffee beans are roasted. Specifically, when the roasting drum 60 rotates in the forward direction during roasting, the blade 64 also rotates in the forward direction with the axis 100 as the center of rotation. As a result, the coffee beans in the inner region of the roasting drum 60 are agitated by the blades 64. The mounting position, angle, dimensions, etc. of the blade 64 are set so that the coffee beans can be effectively stirred by the blade 64.

As shown in FIGS. 4 (b) and 4 (c), a coffee bean discharge hole 69 is provided in the bottom surface portion 61 of the drum. The coffee bean discharge hole 69 is a hole for discharging the coffee beans contained in the internal region of the roasting drum 60 from the internal region. The coffee bean discharge holes 69 according to the present embodiment are provided at two locations as an example. Further, the two coffee bean discharge holes 69 are provided at symmetrical positions with respect to the axis 100 as an example. However, the number and location of the coffee bean discharge holes 69 are not limited to this.

At the time of roasting, the coffee bean discharge hole 69 is closed by the back plate closing portion 56 of the back plate 50. As a result, the coffee beans are not discharged from the coffee bean discharge hole 69 at the time of roasting. On the other hand, when the back plate 50 rotates in the reverse direction after the engagement between the first engaging hole 67 of the drum bottom surface 61 and the protrusion 54 of the back plate 50 is released at the end of roasting, the coffee bean discharge hole 69 The back plate opening 55 of the back plate 50 communicates with the coffee bean discharge hole 69, so that the back plate is opened. As a result, the roasted coffee beans can be discharged from the coffee bean discharge hole 69 to the outside of the roasting drum 60.

Further, as shown in FIG. 4C, a second engaging hole 68 is provided in the drum bottom surface portion 61. When the back plate opening 55 opens the coffee bean discharge hole 69 at the end of roasting, the protrusion 54 of the back plate 50 engages with the second engagement hole 68. The function of the second engaging hole 68 will be described later.

Further, the bottom surface portion 61 of the drum is provided with an elongated hole 70a and an elongated hole 70b provided so as to extend in an arc shape in the circumferential direction. When the roasting drum 60 is arranged on the back plate 50, the bolt head 34 (see FIG. 3C) of the fastening bolt 33a described above is arranged in the elongated hole 70a, and the fastening bolt is arranged in the elongated hole 70b. The bolt head 34 of 33b is arranged.

When arranging the roasting drum 60 on the back plate 50, the roasting drum 60 is placed on the back plate 50 so that the bolt heads 34 of the fastening bolts 33a and 33b are arranged in the elongated holes 70a and 70b, respectively. The protrusion 54 of the back plate 50 can be engaged with the first engaging hole 67 of the roasting drum 60 by arranging the roasting drum 60 and rotating the roasting drum 60 slightly (forward or reverse) if necessary. .. That is, the fastening bolts 33a and 33b not only function as a fastening member for fastening the back plate 50 to the rotating mechanism 30, but also for positioning the roasting drum 60 when the roasting drum 60 is arranged on the back plate 50. It also has a function as a mark. As a result, according to the present embodiment, the roasting drum 60 can be easily positioned with respect to the back plate 50.

Further, by arranging the bolt heads 34 of the fastening bolts 33a and 33b in the elongated holes 70a and 70b, respectively, the relative rotation angle when the back plate 50 rotates relative to the roasting drum 60 can be obtained. , The length of the elongated holes 70a and 70b in the longitudinal direction can be limited. That is, the fastening bolts 33a and 33b also have a function as a member that defines the relative rotation angle range between the back plate 50 and the roasting drum 60.

Specifically, when the protrusion 54 of the back plate 50 engages with the first engaging hole 67 of the roasting drum 60, the bolt heads 34 of the fastening bolts 33a and 33b are in the longitudinal directions of the elongated holes 70a and 70b, respectively. It abuts on the "one end" of the. On the other hand, when the back plate 50 rotates in the opposite direction to the roasting drum 60 and the protrusion 54 of the back plate 50 engages with the second engaging hole 68 of the roasting drum 60, the fastening bolts 33a and 33b The bolt head 34 of the above abuts on the "other end" of the elongated holes 70a and 70b in the longitudinal direction, respectively. As described above, the positional relationship between the protrusion 54, the first engaging hole 67, the second engaging hole 68, the fastening bolts 33a and 33b, and the elongated holes 70a and 70b according to the present embodiment is set.

Subsequently, the configuration of the solenoid 40 and the solenoid engaging protrusion 63 and the operation of the coffee roasting device 1 from the time of roasting to the end of roasting will be described. As shown in FIGS. 5A and 5B, the solenoid 40 is a solenoid main body 41 and a solenoid protruding portion protruding from the solenoid main body 41 in a direction approaching the drum side surface 62 of the roasting drum 60. 42 and. The operation of the solenoid 40 is controlled by the control device of the coffee roasting device 1.

As described above, at the time of roasting, the coffee bean discharge hole 69 of the roasting drum 60 is closed by the back plate 50, and the roasting drum 60 rotates in the forward direction (Fr) in the roasting drum 60. Coffee beans are roasted with hot air. At the time of this roasting, the solenoid 40 keeps the solenoid protruding portion 42 in a non-protruding state (non-protruding state). That is, at the time of roasting, the solenoid 40 is in a state where it does not abut on the solenoid engaging protrusion 63 (a state where it does not engage), so that the rotation of the roasting drum 60 is hindered by the solenoid 40. It is prevented.

On the other hand, at the end of roasting, as described above, the rotation mechanism 30 reversely rotates (Br) the back plate 50. Along with the reverse rotation of the back plate 50, the roasting drum 60 engaged with the back plate 50 also rotates in the reverse direction. Then, at the end of roasting, the solenoid 40 projects the solenoid projecting portion 42. As a result, the solenoid protruding portion 42 comes into contact with the solenoid engaging protrusion 63.

Here, the solenoid engaging protrusion 63 is in a direction in which the roasting drum 60 separates from the back plate 50 when the roasting drum 60 rotates in the reverse direction while the solenoid engaging protrusion 42 is in contact with the solenoid engaging protrusion 63. The shape is set so as to be displaced by a predetermined distance in the (-Y direction).

Therefore, when the solenoid projecting portion 42 comes into contact with the solenoid engaging protrusion 63 at the end of roasting, and the back plate 50 rotates in the reverse direction in this state, the roasting drum 60 also rotates in the reverse direction. Upon receiving the force from the solenoid protrusion 42, the solenoid is displaced in the direction away from the back plate 50 (-Y direction). When the roasting drum 60 is displaced in this way, as shown in FIG. 5B, the first engaging hole 67 of the roasting drum 60 is disengaged from the protrusion 54 of the back plate 50. That is,
The engagement between the first engaging hole 67 and the protrusion 54 is released.

Then, after the engagement between the first engaging hole 67 and the protrusion 54 is released at the end of roasting as described above, the back plate 50 continues to rotate in the reverse direction, so that the back plate 50 becomes the roasting drum 60. It rotates in the opposite direction to the relative. As a result, the back plate opening 55 of the back plate 50 opens the coffee bean discharge hole 69 of the roasting drum 60. When the back plate opening 55 opens the coffee bean discharge hole 69, the protrusion 54 of the back plate 50 engages with the second engagement hole 68 of the roasting drum 60 (the protrusion 54 is the second). Fits into the engagement hole 68). As a result, the relative rotation positions of the back plate 50 and the roasting drum 60 are securely fixed in a state where the back plate opening 55 opens the coffee bean discharge hole 69.

When the protrusion 54 of the back plate 50 engages with the second engaging hole 68 of the roasting drum 60, the bolt heads 34 of the fastening bolts 33a and 33b are the elongated holes 70a and 70b of the roasting drum 60, respectively. Abuts on the other end in the longitudinal direction of the.

Even after the protrusion 54 of the back plate 50 engages with the second engaging hole 68 of the roasting drum 60, the back plate 50 according to the present embodiment continues to rotate in the reverse direction. As a result, the roasting drum 60 engaged with the back plate 50 also continues to rotate in the reverse direction together with the back plate 50.

Next, the solenoid 40 ends the protrusion of the solenoid protrusion 42. Next, the control device of the coffee roasting device 1 controls the discharge port lid 14 (FIG. 2A) to open the discharge port 13. As a result, the coffee beans in the roasting drum 60 pass through the coffee bean discharge holes 69 and the discharge port 13 and are discharged to the outside of the coffee roasting device 1. Specifically, while the roasting drum 60 continues to rotate in the reverse direction, the coffee beans in the inner region of the roasting drum 60 are discharged from the coffee bean discharge hole 69 so as to fall into the coffee bean discharge hole 69, and then coffee. The beans pass through the discharge port 13 and are discharged to the outside of the coffee roasting device 1. Next, the control device of the coffee roasting device 1 stops the rotation of the rotation mechanism 30. As a result, the rotation of the back plate 50 and the roasting drum 60 is also stopped.

According to the coffee roasting apparatus 1 according to the present embodiment as described above, the roasting drum 60 is closed while the coffee bean discharge holes 69 of the roasting drum 60 are closed during roasting by the simple configuration as described above. The coffee beans are roasted with hot air while rotating in the forward direction, and at the end of roasting, the coffee bean discharge holes 69 can be opened so that the coffee beans can be discharged from the roasting drum 60. As a result, it is not necessary to discharge the roasted coffee beans from the roasting drum 60 by hand (specifically, by hand wearing leather gloves), so that when the roasted coffee beans are discharged from the roasting drum 60, There is no risk of burns. That is, according to the present embodiment, the roasted coffee beans can be safely discharged from the roasting drum 60 while simplifying the configuration.

Further, according to the present embodiment, as described above, since the configuration is simple, the positional relationship of the constituent members can be easily adjusted at the time of assembling the coffee roasting apparatus 1. Specifically, by simply adjusting the positional relationship, the roasting drum 60 is arranged on the back plate 50 so that the first engaging hole 67 of the roasting drum 60 engages with the protrusion 54 of the back plate 50. Therefore, it is easy to adjust the positional relationship between the roasting drum 60 and the back plate 50.

Further, according to the present embodiment, at the time of roasting, the protrusion 54 of the back plate 50 engages with the first engaging hole 67 of the roasting drum 60, so that the back plate 50 and the roasting drum 60 are relative to each other. The rotation position can be reliably fixed. As a result, the coffee bean discharge hole 69 can be reliably closed by the back plate closing portion 56 during the forward rotation of the roasting drum 60 during roasting, so that the coffee bean discharge hole 69 is intended during roasting. It is possible to prevent the coffee beans from being opened without being opened.

Further, according to the present embodiment, at the end of roasting, the protrusion 54 of the back plate 50 engages with the second engaging hole 68 of the roasting drum 60, so that the back plate 50 and the roasting drum 60 are engaged with each other. The relative rotation position can be reliably fixed. As a result, it is possible to prevent the coffee bean discharge hole 69 from being unintentionally blocked at the end of roasting.

Further, according to the present embodiment, since the roasting drum 60 is configured to be easily taken out from the coffee roasting apparatus 1, the roasting drum 60 can be easily cleaned.

Further, as described above in FIG. 2A, the roasting drum 60 according to the present embodiment accommodates the coffee roasting apparatus 1 so that its axis 100 is inclined diagonally upward with respect to the horizontal direction. Since it is housed in the portion 11, the internal region of the roasting drum can be visually recognized from the obliquely upper side during roasting through the viewing window 12. Thereby, the roasted state of the coffee beans at the time of roasting can be easily visually recognized (visually).

The material of the roasting drum 60 is preferably metal. According to this configuration, the durability of the roasting drum 60 can be enhanced. The specific type of this metal is not particularly limited, but for example, stainless steel or the like can be used.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to such specific embodiments, and various modifications and modifications are made within the scope of the gist of the present invention described in the claims. Is possible.

1 Coffee roasting device 10 Roasting main body 12 Visual window 20 Hot air supply device 30 Rotating mechanism 40 Solenoid 50 Back plate 51 Back plate main body 54 Protrusion 55 Back plate opening 56 Back plate closing part 60 Roasting drum 61 Drum bottom Part 62 Drum side part 63 Solenoid engaging protrusion 67 First engaging hole 68 Second engaging hole 69 Coffee bean discharge hole

Claims (2)

With the back plate
A rotation mechanism that rotates the back plate forward at the time of roasting and reverse rotation of the back plate at the end of roasting.
It has a drum bottom surface portion arranged so as to face the back plate, and a drum side surface portion extending in a direction away from the back plate starting from the outer peripheral edge of the drum bottom surface portion, and at the time of roasting. Hot air is supplied to the coffee beans housed in the internal region partitioned by the bottom surface of the drum and the side surface of the drum, and the first engaging hole of the bottom surface of the drum engages with the protrusion of the back plate. With the roasting drum that rotates in the forward direction as the back plate rotates in the forward direction,
At the end of roasting, the roasting drum is displaced in a direction away from the back plate by abutting on the solenoid engaging protrusion on the side surface of the drum to engage the first engaging hole with the protruding portion. Equipped with a solenoid to release
The back plate is disengaged from the back plate closing portion that closes the coffee bean discharge hole at the bottom surface of the drum at the time of roasting, and the first engaging hole and the protrusion at the end of the roasting. A coffee roasting apparatus including a back plate opening that opens the coffee bean discharge hole by communicating with the coffee bean discharge hole when the back plate rotates in the reverse direction. The claim that the bottom surface of the drum is provided with a second engaging hole with which the protrusion of the back plate engages when the opening of the back plate opens the coffee bean discharge hole at the end of roasting. Item 1. The coffee roasting apparatus according to item 1.

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