Roasting equipment

Abstract

To provide a roasting device that is less likely to cause a lump and uneven roasting when roasting powder as a roasting object.SOLUTION: A roasting device 10 includes: a bottomed powder container 20 for storing powder that is a roasting object; heaters 12A, 12B for heating the roasting object; and a container moving mechanism 40 for moving the powder container 20 on a plane. The powder container 20 includes a current plate 21 projecting toward the inside in the inner surface thereof.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a roasting device for roasting powders.

Background Art

[0002] Conventionally, various roasting devices are known. For example, the roasting device described in Patent Document 1 is for heating and roasting roasting targets such as coffee beans, other grains, or tea leaves. The roasting device of Patent Document 1 includes a sealable storage container that can store a roasting target inside and maintain the internal atmosphere at a pressure higher than atmospheric pressure while preventing the internal atmosphere from flowing in and out, and a heating mechanism disposed inside the storage container for heating the roasting target stored inside the sealed storage container. The heating mechanism includes a rotatable drum that stores the roasting target therein and a heater that heats the roasting target inside the drum. During at least one period or the entire period of heating and roasting the roasting target, the atmosphere inside the storage container is maintained at a high pressure and airtightness is maintained to prevent the atmosphere from leaking to the outside, and roasting is performed while rotating the drum.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the invention described in Patent Document 1, objects having a certain size, such as coffee beans, other grains, or tea leaves, are used as roasting targets, and roasting can be performed by storing the roasting targets in the drum and rotating them. However, when coffee beans, grains, tea leaves, etc. are ground into powders, there is a problem that when the powders are roasted, lumps are formed due to the moist air emitted from the roasting target during roasting, and uneven roasting is likely to occur.

[0005] This invention has been made in view of the above-mentioned problems, and aims to provide a roasting apparatus that is less likely to form clumps and less likely to produce uneven roasting when roasting powdered material. [Means for solving the problem]

[0006] To achieve the above objectives, the present invention encompasses the subject matter described in the following sections.

[0007] Item 1: A container with a bottom for powders that will be roasted, A heater for heating the roasting material, The system includes a container moving mechanism for moving the aforementioned powder container on a surface, A roasting apparatus having a rectifier plate protruding inward on the inner surface of the powder container.

[0008] Item 2: The roasting apparatus according to Item 1, wherein the rectifier plate is provided near the periphery of the bottom of the powder container.

[0009] Item 3: The rectifier plate has a rectangular shape when viewed from the front. The bottom of the aforementioned powder container has a circular, flat surface when viewed from a plane. The roasting apparatus according to item 1 or 2, wherein, when the powder container is viewed from above, the rectifier plate is installed at an angle of 15 degrees or more and 35 degrees or less with respect to an imaginary line connecting the first end of the rectifier plate near the periphery of the bottom and the center point of the bottom.

[0010] Item 4: The roasting apparatus according to any one of items 1 to 3, wherein the powder container comprises a bottom portion and a circumferential portion extending diagonally upward from the bottom portion, the circumferential portion including a curved portion that curves outward in a convex shape on the lower side.

[0011] Item 5: The roasting apparatus according to any one of items 1 to 4, wherein the container moving mechanism comprises an arm and a motor connected to the arm, and rotates the powder container on a surface.

[0012] Item 6: The casing is equipped with a support mechanism for supporting the powder container within the casing, The support mechanism includes a support plate provided on the circumferential side of the powder container, The support plate comprises a pair of rails into which it is inserted from the front to the rear, The rail and the support plate are inclined so that they become lower towards the rear. The roasting apparatus according to any one of claims 1 to 5, wherein when the support plate is inserted into the rail, the bottom of the powder container is parallel to a horizontal plane perpendicular to the vertical direction.

[0013] Item 7: The roasting apparatus according to any one of items 1 to 6, further comprising a container for granular material containing a second roasting target granular material, located above or below the powder container. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a roasting apparatus that is less likely to form clumps and less likely to produce uneven roasting when roasting powdered materials. [Brief explanation of the drawing]

[0015] [Figure 1] This is a side view showing the overall schematic configuration of a roasting apparatus according to one embodiment of the present invention, with a portion of the casing removed. [Figure 2] This is a front view showing the overall schematic configuration of the roasting machine, with a portion of the casing removed. [Figure 3] This is a side view of a powder container and support plate. [Figure 4] (A) is a plan view of the powder container and support plate, and (B) is a partial enlargement view of (A). [Figure 5] (A) is a side view of the rectifier plate, and (B) is a front view of the rectifier plate. [Figure 6] This is a plan view showing components such as a container transfer mechanism, a support mechanism, and a container for powders. [Figure 7] This is a side view showing components such as a container transfer mechanism, a support mechanism, and a container for powders. [Figure 8](A) is a sectional view taken along the line A-A of FIG. 7, and (B) is an enlarged view of the B portion of (A).

Embodiments for Carrying Out the Invention

[0016] Embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show a roasting apparatus 10 according to an embodiment of the present invention. As shown in FIG. 1, the roasting apparatus 10 of the present embodiment includes a bottomed powder container 20 in which powder to be roasted is accommodated, heaters 12A and 12B for heating the object to be roasted, a container moving mechanism 40 for moving the powder container 20 on a plane, and a support mechanism 30 for supporting the powder container 20 in the housing 11. The powder container 20 has a rectifying plate 21 protruding toward the inside of the powder container 20 on its inner surface. Further, the roasting apparatus 10 of the present embodiment includes a granule container 16 in which granules as a second object to be roasted are accommodated above or below the powder container 20, but the granule container 16 does not necessarily have to be provided.

[0017] In the present embodiment, unless otherwise specified, the vertical direction is defined based on FIG. 1, the right side of FIG. 1 is the rear of the roasting apparatus 10, and the left side is the front or the front face of the roasting apparatus 10. That is, FIG. 2 is a view of the roasting apparatus 10 seen from the front side or the front, and the left-right direction in FIG. 2 is the left-right direction of the apparatus. Also, a plane orthogonal to the vertical direction in FIG. 1 and including the front-rear direction and the left-right direction is defined as the horizontal plane. Note that the vertical direction does not necessarily have to be strictly along the vertical direction, and may be inclined with respect to the vertical direction to such an extent that the powder to be roasted can be roasted. Also, in FIGS. 1 and 2, a part of the housing 11 is not shown for the purpose of explaining the inside.

[0018] (Object to be roasted) The roasting target of the roasting apparatus 10 according to this embodiment is powder. In this specification, powder is an aggregate of particles with a longest diameter of approximately 500 μm or less, and its form is not limited. Examples of powder include cricket powder, ground coffee beans, and kinako (roasted soybean flour). Cricket powder, in particular, is required to be roasted to enhance its flavor and for sterilization. The second roasting target is granular material. Granular material is an aggregate of particles with a longest diameter of approximately 500 μm or more, and the particles include forms such as granules, pellets, chips, fibers, and flakes. Examples of granular material include nuts such as almonds and peanuts, coffee beans, soybeans, and bean / rice confectionery.

[0019] (Overall structure) Inside the housing 11, directly below the upper wall 11a, an insulating cover 13 is attached by bolts and nuts. Below the insulating cover 13, an upper heater 12A is provided for roasting the powder, which is the material to be roasted, contained in the powder container 20. The upper heater 12A can have any configuration as long as it can heat the powder container 20 or the granular container 16 for roasting powder or granules, and in this embodiment, a ceramic-coated gas heater that generates far-infrared rays is used. A suction fan 14 is provided inside the cover 11c on the upper surface of the upper wall 11a of the housing 11. The duct 14a of the suction fan 14 penetrates the upper wall 11a of the housing 11 and is connected to the upper heater 12A. The inside of the duct 14a and the inside of the upper heater 12A are in communication, and combustion gas is distributed inside the upper heater 12A by suction from the suction fan 14. In addition, an emergency stop switch (not shown) is provided on the side wall of the housing 11.

[0020] Below the upper heater 12A, a powder container 20, a granular container 16, and a container transfer mechanism 40 are provided. An opening 11b is formed on the front of the housing 11, allowing the powder container 20 and the granular container 16 to be inserted into and removed from the housing 11 through the opening 11b. The powder container 20, the granular container 16, and the container transfer mechanism 40 will be described later. A thermocouple 17 is provided between the upper heater 12A and the powder container 20 to measure the temperature of the top of the powder container 20.

[0021] A lower heater 12B is provided below the powder container 20 and the granular container 16. The lower heater 12B can be raised and lowered by a lifting mechanism 15 provided on the lower wall of the housing 11. In this embodiment, the lifting mechanism 15 comprises a handle 15a and a conversion mechanism 15b that is connected to the rotation axis of the handle 15a and converts the rotational motion of the rotation axis into vertical motion. The conversion mechanism 15b is a known mechanism composed of gears, nuts, a ball screw that screws into the nut, etc., and the lower heater 12B is attached to the upper end of the ball screw. When the handle 15a rotates in either the forward or reverse direction, the lower heater 12B moves in either the up or down direction according to the direction of rotation. The lifting mechanism 15 may also use a linear motor, a hydraulic jack, etc., and its operation may be controlled by a control device described later. The lower heater 12B can have any configuration as long as it can heat the powder container 20 or the granular container 16 for roasting powder or granules, for example, it may be a gas burner. The type of upper heater 12A and lower heater 12B is selected according to the type of powder or granules.

[0022] The roasting apparatus 10 may include a control device (not shown) that controls the operation of the upper heater 12A, the lower heater 12B, the container moving mechanism 40, etc. The control device may be a general-purpose personal computer consisting of a CPU, memory, touch panel, monitor, rotary knob and other input units.

[0023] (Powder container 20) Figures 3 and 4 show the powder container 20. The powder container 20 has a bottom and an open top. As shown in Figure 4, the powder container 20 has a circular shape when viewed from above and comprises a bottom portion 22 and a peripheral portion 23 that extends diagonally upward from the bottom portion 22. The bottom portion 22 has a circular shape when viewed from above and is a flat surface. The peripheral portion 23 has a diameter that increases towards the top and, when viewed from the side, comprises a first curved portion 23a that is continuous with the bottom portion 22 and curves outward in a convex shape, an inclined portion 23b which is a flat surface continuous with the first curved portion 23a, and a second curved portion 23c which is continuous with the inclined portion 23b and curves inward in a convex shape. The powder container 20 is made of a metal such as stainless steel, iron, or aluminum.

[0024] A flow straightening plate 21 is provided at the bottom 22, protruding toward the inside of the powder container 20. The flow straightening plate 21 is made of the same metal material as the powder container 20. As shown in Figure 5(A), the flow straightening plate 21 is formed by bending a strip-shaped plate member. When viewed from the side, the flow straightening plate 21 is L-shaped, with a first piece 21a and a second piece 21b connected, and the angle between the first piece 21a and the second piece 21b is approximately 90 degrees. The second piece 21b is fixed to the bottom 22 by welding or the like, and the first piece 21a, which is longer in the longitudinal direction than the second piece 21b, protrudes toward the inside of the powder container 20 (the upper side of the powder container 20). As shown in Figure 5(B), when the flow straightening plate 21 is viewed from the front, i.e., from the right side of Figure 5(A), the first piece 21a is rectangular. The width W and height H of the flow straightening plate 21 are set as follows. The width W of the rectifier plate 21 relative to the diameter WC of the bottom 22, i.e., W / WC, is set to be between 0.1 and 0.6. The height H of the rectifier plate 21 relative to the height HC of the powder container 20, i.e., H / HC, is set to be between 0.1 and 0.6. In addition, the thickness D of the first piece 21a of the rectifier plate 21 relative to the width W, i.e., D / W, is set to be between 1 / 100 and 1 / 15.

[0025] As shown in Figure 4(A), when viewing the powder container 20 from above, the rectifier plate 21 is provided such that the first piece 21a is located near the periphery 22a of the bottom 22. The first piece 21a of the rectifier plate 21 is provided such that the width direction of the rectifier plate 21 (indicated by arrow R) is inclined with respect to the radial direction of the bottom 22. When viewing the powder container 20 from above, if the first end portion 21c is defined as one of the four corners on the upper surface of the first piece 21a of the rectifier plate 21 that is closest to the periphery 22a of the bottom 22, then the angle α between the imaginary line L connecting the first end portion 21c and the center point P of the bottom 22 and the width direction of the rectifier plate 21 is set to be between 15 degrees and 35 degrees. Furthermore, the length L1 between the center point P of the bottom 22 and the first end 21c of the rectifier plate 21, i.e., L1 / LC1, is set to be 0.5 or more and 1 or less, relative to the length LC1 between the center point P of the bottom 22 and the periphery 22a of the bottom 22 passing through the first end 21c of the first piece 21a of the rectifier plate 21. In this embodiment, when L1 / LC1 is 1, the first end 21c of the rectifier plate 21 is located on the periphery 22a of the bottom 22. The statement that the first piece 21a is located near the periphery 22a of the bottom 22 includes the first end 21c being located near the periphery 22a and being located on the periphery 22a.

[0026] In this embodiment, the width W of the rectifier plate 21 is set to 40 mm, the height H of the rectifier plate 21 is set to 20 mm, the thickness D of the rectifier plate 21 is set to 1 mm, the diameter WC of the bottom 22 is set to 210 mm, and the height HC of the powder container 20 is set to 115 mm. In addition, the angle α is set to 30 degrees, the length L1 of the imaginary line connecting the center point P of the bottom 22 and the first end 21c of the rectifier plate 21 is set to 105 mm, and the length LC1 of the imaginary line connecting the center point P of the bottom 22 and the periphery 22a of the bottom 22, passing through the end of the first piece 21a of the rectifier plate 21 is set to 105 mm.

[0027] The rectifier plate 21 is not limited to this embodiment; it is sufficient to be able to roast the powdered material to be roasted. For example, it may consist only of the first piece 21a or the second piece 21b. Also, the shape of the front of the rectifier plate 21 is not limited to a rectangular shape; it may be any shape, such as a triangle, square, circle, ellipse, pentagon, or other polygon. Furthermore, the rectifier plate 21 may be columnar rather than plate-shaped.

[0028] In this embodiment, one rectifier plate 21 is provided, but the number of rectifier plates 21 is not limited, and two or more may be provided. If two rectifier plates 21 are provided, they may be positioned symmetrically with respect to the center point P of the bottom 22 of the powder container 20. If three or more rectifier plates 21 are provided, they may be positioned so that the central angles around the center point P of the bottom 22 of the powder container 20 are equally spaced. If two or more rectifier plates 21 are provided, the size and shape of each rectifier plate 21 may differ. In this embodiment, the rectifier plate 21 is provided on the bottom 22 of the powder container 20, but it may also be provided on the first curved portion 23a of the peripheral portion 23, or it may be provided so as to span from the bottom 22 to the first curved portion 23a.

[0029] (Support mechanism 30 for powder container 20) As shown in Figures 6 and 7, the support mechanism 30 for the powder container 20 includes a support plate 24 attached to the outside of the peripheral side portion 23 of the powder container 20, a container support frame 31 (31A to 31D) for supporting the powder container 20, rail supports 32 provided on the left and right container support frames 31A and 31B, and a pair of rails 33 supported by the rail supports 32 into which the support plate 24 is inserted from the front to the rear.

[0030] As shown in Figures 3 and 4, the support plate 24 is a rectangular plate-shaped member when viewed from above, with an opening formed in the center. The size of the opening corresponds to the size of the side of the powder container 20, and the powder container 20 is fitted into the opening. The support plate 24 is fixed to the powder container 20 by multiple L-shaped connecting members 24b. As shown in Figure 3, when viewed from the side, the support plate 24 is inclined so that it is lower towards the rear relative to the bottom 22 of the flat surface of the powder container 20. As will be described later, the support plate 24 is supported by the rail 33 of the support mechanism 30 in an inclined state, and this inclination prevents the powder container 20 from flying forward from the rail 33 when the powder container 20 rotates. In order to prevent flying out, it is preferable to set the angle β at which the support plate 24 is inclined with respect to the horizontal plane as large as possible, preferably set to 4 degrees or more and 12 degrees or less, and in this embodiment it is set to 8 degrees. The angle β is set according to the size of the opening 11b of the housing 11 and the size of the space inside the housing 11 in which the powder container 20 is housed. A roughly U-shaped handle 25 is attached to the front of the support plate 24. The worker grasps the handle 25 to insert the support plate 24 into the rail 33 or remove the support plate 24 from the rail 33.

[0031] As shown in Figure 6, container support frames 31 (31A~31D) are provided on the left, right, and front sides of the powder container 20 and the granular container 16 when viewed from above. The rear ends of the left and right container support frames 31A and 31B are connected to the container moving mechanism 40, and one end of a suspension member 34 is connected to both the left and right ends of the front container support frame 31C. The other ends of the two suspension members 34 are connected to the upper wall 11a of the housing 11. The container support frames 31 are positioned inside the housing 11, with their rear sides supported by the container moving mechanism 40 and their front sides supported by the suspension members 34. The length of the suspension members 34 is adjusted so that the container support frames 31 are parallel to the horizontal plane.

[0032] As shown in Figures 6 and 7, two rail supports 32 are provided along the front-rear direction of each of the left and right container support frames 31A and 31B. As shown in Figure 8, each rail support 32 has an L-shaped cross-section, with a first piece 32a and a second piece 32b formed by bending a strip-shaped plate member at approximately 90 degrees, and the first piece 32a is fixed to the container support frames 31A and 31B by welding or the like. The second piece 32b of the rail support 32 extends upward, and a rail 33 is attached to the inside of the tip of the second piece 32b. The rail 33 has two L-shaped members 33A and 33B arranged vertically, each L-shaped member 33A and 33B formed by bending a strip-shaped plate member at approximately 90 degrees and having a first piece 33a and a second piece 33b. The second pieces 33b of each of the two L-shaped members 33A and 33B are attached to the rail support 32 such that the first pieces 33a of each L-shaped member 33A and 33B face each other with a gap S between them. The gap S between the first pieces 33a of the two L-shaped members 33A and 33B of the rail 33 is slightly larger than the thickness of the support plate 24 of the powder container 20, and the support plate 24 of the powder container 20 can be inserted into this gap S. As shown in Figure 7, the height of the rear rail support 32 is lower than the height of the front rail support 32, and the rail 33 is inclined downwards towards the rear. The inclination angle γ of the rail 33 with respect to the horizontal is set to the same angle β as the inclination angle of the support plate 24 with respect to the bottom 22 of the powder container 20. A stopper 35 is provided between the two L-shaped members 33A and 33B at the rearmost part of the rail 33. The support plate 24 abuts against the stopper 35 (Figure 7) and does not move any further backward, remaining stationary on the rail 33. The left and right ends of the support plate 24 of the powder container 20 are inserted into the gap S from the front of the rail 33, and with the support plate 24 abutting against the stopper 35 and stationary, the bottom 22 of the powder container 20 becomes parallel to the horizontal plane.

[0033] (Container for granules 16) The granular container 16 is for containing and roasting granular material, which is the second material to be roasted. The granular container 16 comprises a bottom portion 16a, a side portion 16b rising from the bottom portion 16a, and a lid portion 16c, the lid portion 16c being openable and closable. To ensure ventilation, a portion of the lid portion 16c may be a mesh with multiple through holes. As shown in Figure 6, the granular container 16 has a roughly octagonal shape when viewed from above, but the granular container 16 may have any shape as long as it can contain and roast granular material. In this embodiment, a receiving portion 16d is provided on the front side of the granular container 16, and the front side portion of the granular container 16 is openable and closable. When removing granular material from the granular container 16, a receiving tray is placed in front of the receiving portion 16d, and the front side portion of the granular container 16 is opened to remove the granular material through the receiving portion 16d into the receiving tray. At this time, the granular container 16 may be tilted so that the front side is facing downwards. The granular container 16 is fixed to the container support frame 31 via connecting means such as an L-shaped member (not shown).

[0034] (Container transfer mechanism 40) As shown in Figures 6 and 7, the container moving mechanism 40 comprises a pair of arms 41 extending from the container support frames 31A and 31B, a drive motor 42 connected to the arms 41 and providing rotational motion to the arms 41, and bearings 43 connecting each arm 41 to the drive motor 42. As shown in Figure 1, the drive motor 42 is positioned on a support base at the rear of the housing 11, and the motor shaft 42a of the drive motor 42 is oriented vertically. A circular rotating plate 44 is attached to the tip of the motor shaft 42a when viewed from above, and bearings 43 are provided near the circumference of the upper surface of the rotating plate 44. As the rotating plate 44 rotates around the motor shaft 42a by the drive motor 42, the arms 41 pivot on the plane relative to the rotating plate 44. The arms 41 are attached to the container support frames 31, and the powder container 20 and the granular container 16 are attached to the container support frames 31, so the powder container 20 and the granular container 16 pivot within the housing 11. In this embodiment, the powder container 20 and the granular container 16 rotate on a horizontal plane. Rotation on a plane means that the trajectories of the powder container 20 and the granular container 16 move in a circular or elliptical pattern around a certain point, and that the trajectories lie on the same plane. Furthermore, the powder container 20 and the granular container 16 do not necessarily need to rotate on a horizontal plane; they may rotate on a plane inclined with respect to the horizontal plane. The container moving mechanism 40 may also be equipped with one drive motor 42. In this case, the rotational motion of the drive motor 42 is transmitted from the drive motor 42 via a bearing 43 to rotate one arm 41, and the rotation axis of the other rotating plate 44 and the rotation axis of the drive motor 42 are connected by an endless belt, transmitting the rotational motion of the drive motor 42 to the other rotating plate 44 to rotate the other arm 41. The container moving mechanism 40 may also be equipped with a drive motor 42 for each arm 41. In this case, each drive motor 42 is controlled by the control device so that each drive motor 42 rotates at the same rotational speed.

[0035] The container moving mechanism 40 is not limited to the above, and any mechanism that can move the powder container 20 and the granular container 16 within the housing 11 for roasting powder or granules may be used. The container moving mechanism 40 may move the powder container 20 and the granular container 16 in at least one direction on a surface, such as the front-to-back direction, the left-to-right direction, or a direction oblique to the front-to-back or left-to-right direction. In this case, a linear motor or the like may be used as the container moving mechanism 40.

[0036] (Operation of the roasting device 10) The procedure for roasting powder or granules using the roasting apparatus 10 of this embodiment will now be described. First, the operator places the powder to be roasted into the powder container 20. The support plate 24 of the powder container 20 is inserted into the rail 33 to position the powder container 20 inside the housing 11. Next, the granules, which are the second material to be roasted, are placed into the granule container 16. Note that the granules may not be roasted, and only the powder material to be roasted may be roasted. Next, the operator adjusts the height of the lower heater 12B by operating the handle 15a of the lifting mechanism 15. The height of the lower heater 12B is adjusted according to the material to be roasted. The operator also inputs roasting conditions such as the temperature of the upper heater 12A, the temperature of the lower heater 12B, the roasting time, and the rotation speed of the drive motor 42 of the container moving mechanism 40 from the input unit such as the touch panel of the control device. Note that the roasting conditions may be stored in the memory of the control device in advance. Then, when the operator commands the start of the roasting operation from the touch panel or the like, the roasting device 10 starts operating, and the container moving mechanism 40 rotates the powder container 20 and the granular container 16 within the housing 11, while the upper heater 12A and lower heater 12B are driven. When the set roasting time has elapsed, the control device terminates the roasting operation. After the roasting operation is finished, the operator pulls out the powder container 20 and takes out the roasted powder. They also take out the granules from the granular container 16.

[0037] The roasting conditions and the operation of the roasting device 10 are not limited to the embodiments described above. For example, instead of setting the temperatures of the upper heater 12A and lower heater 12B themselves, the temperature of the heat applied from the upper heater 12A and lower heater 12B to the powder container 20 and the granular container 16 may be adjusted by setting the amount of gas or the vertical position of the lower sheeter 12B using the lifting mechanism 15. Also, instead of automatically ending the roasting operation after a set time has elapsed, a warning may be issued when the measurement value from the thermocouple 17 exceeds a set value, allowing the operator to end the roasting operation. Alternatively, the measurement value from the thermocouple 17 may be displayed on a panel, allowing the operator to visually check the temperature and end the roasting operation when the set temperature is reached. Furthermore, the input unit is not limited to a touch panel; it may also be a rotary dial, operation knob, button, etc., provided for each parameter.

[0038] In this embodiment, the powder container 20 and the granular container 16 rotate during roasting, so the powder is heated while rotating within the powder container. Without the rectifier plate 21, the powder particles may stick together and form clumps during the rotational movement. Alternatively, the powder particles may not mix together and the entire mass may rotate within the powder container 20 as a large lump. However, in this embodiment, the rectifier plate 21 is provided, so the rotating powder particles collide with the rectifier plate 21, changing their direction of movement, making it easier for the powder particles to mix together and reducing the likelihood of clump formation. Even if clumps do form, they will break apart and disappear upon contact with the rectifier plate 21. In this way, the powder particles mix together during roasting and are less likely to form clumps, resulting in uniform roasting.

[0039] The powder container 20 is rotating, and the powder moves toward the periphery 22a of the bottom 22 of the powder container due to centrifugal force. The rectifier plate 21 is provided near the periphery 22a of the bottom 22 of the powder container 20, so that the powder that has moved toward the periphery 22a hits the rectifier plate 21 and returns toward the center point P of the powder container 20. In this way, the powder repeatedly moves toward the periphery 22a and toward the center, which makes it less likely for clumps to form in the powder during roasting, and the powder mixes more thoroughly, resulting in uniform roasting.

[0040] Furthermore, in this embodiment, when the powder container 20 is viewed from above, the rectifier plate 21 is installed at an angle with respect to the longitudinal direction. The angle of inclination α is between 15 degrees and 35 degrees with respect to a virtual line connecting the first end portion 21c of the rectifier plate 21 near the periphery 22a of the bottom 22 and the center point P of the bottom 22. This makes it easier for the powder to collide with the rectifier plate 21, and prevents the movement of the powder from being blocked by the rectifier plate 21.

[0041] The powder container 20 comprises a bottom portion 22 and a circumferential portion 23 that extends diagonally upward from the bottom portion 22. The circumferential portion 23 is continuous with the bottom portion 22 and includes a first curved portion 23a that curves outward in a convex shape on the lower side. Because the lower side of the circumferential portion 23 is curved, powder is less likely to accumulate on the lower side of the circumferential portion 23 compared to a case where the lower side of the circumferential portion 23 is a corner.

[0042] Furthermore, the powder container 20 is supported within the housing 11 by a support mechanism 30, and the support plate 24 and rail 33 of the support mechanism 30 are inclined downwards towards the rear. Therefore, when the powder container 20 rotates, the powder container 20, which is fitted into the support plate 24, does not fly out from the rail 33 to the front. Also, the support plate 24 and rail 33 are inclined at the same angle, so when the support plate 24 is inserted into the rail 33, the bottom 22 of the powder container 20 is parallel to the horizontal plane without tilting. Therefore, the shortest distance between the upper heater 12A and the lower heater 12B and any position on the bottom 22 of the powder container 20 is constant, and the powder is roasted uniformly.

[0043] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the present invention. Furthermore, the dimensions, materials, shapes, and relative arrangements of components described or shown in the drawings as embodiments are not intended to limit the scope of the present invention, but are merely illustrative examples. Expressions indicating that things are equivalent, such as "same," "identical," "equal," and "homogeneous," should not only indicate strictly equivalent states, but also include states where tolerances or differences exist to the extent that the same function can be achieved. Expressions indicating a square shape or a circular shape should not only indicate geometrically precise shapes such as squares and cylinders, but also include shapes that include uneven parts, chamfers, etc., to the extent that the same effect can be achieved. Expressions such as "equipped," "possessed," "possess," "include," or "have" a single component are not exclusive expressions that exclude the existence of other components. "Parallel" and "orthogonal" mean substantially "parallel" and "orthogonal," and include not only strictly "parallel" and "orthogonal" states, but also states that include errors of a few degrees. [Explanation of Symbols]

[0044] 10 Roasting equipment 12A, 12B heater 16 Container for granules 20 Container for powder 21 Rectifier plate 21c 1st end 22 Bottom 22a Periphery 23 Side section 23a Curved section (first curved section) 24 Support plate 30 Support mechanism 31 (31A~31D) Container support frame 32 Rail support 33 pairs of rails 40 Container transfer mechanism 41 Arm 42 Drive motor 44 Rotating Plates P: Center point of the base

Claims

1. A container with a bottom for powders that contains the powder to be roasted, A heater for heating the roasting material, The system includes a container moving mechanism for moving the aforementioned powder container on a surface, A roasting apparatus having a rectifier plate protruding inward on the inner surface of the powder container.

2. The roasting apparatus according to claim 1, wherein the rectifier plate is provided near the periphery of the bottom of the powder container.

3. The aforementioned rectifier plate has a rectangular shape when viewed from the front. The bottom of the aforementioned powder container has a circular, flat surface when viewed from a plane. The roasting apparatus according to claim 1, wherein, when the powder container is viewed from above, the rectifier plate is inclined at an angle of 15 degrees or more and 35 degrees or less with respect to an imaginary line connecting the first end of the rectifier plate near the periphery of the bottom and the center point of the bottom.

4. The roasting apparatus according to claim 1, wherein the powder container comprises a bottom portion and a peripheral portion extending diagonally upward from the bottom portion, and the peripheral portion includes a curved portion that curves outward in a convex shape on the lower side.

5. The roasting apparatus according to claim 1, wherein the container moving mechanism comprises an arm and a motor connected to the arm, and rotates the powder container on a surface.

6. The aforementioned powder container is provided with a support mechanism that supports it within the housing, The support mechanism includes a support plate provided on the circumferential side of the powder container, The support plate comprises a pair of rails into which it is inserted from the front to the rear, The rail and the support plate are inclined so that they become lower towards the rear. The roasting apparatus according to claim 1, wherein when the support plate is inserted into the rail, the bottom of the powder container is parallel to a horizontal plane perpendicular to the vertical direction.

7. The roasting apparatus according to claim 1, further comprising a container for granular material containing a second object to be roasted, located above or below the powder container.

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