JP2001197875A - Drum unit for roasting coffee bean or the like, and roaster using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum unit for roasting coffee beans or the like, and a roaster using the drum unit wherein coffee beans and the like are roasted so as to make the beans have extremely good flavor. SOLUTION: This drum unit for roasting coffee beans has a ceramic drum 11 and a drive shaft 12 provided with spokes 13 and arranged on the axis C of the drum 11. The other objective roaster using the above drum works as follows: when the material is put into the drum 11 and the drum 11 is rotated under heating, the material in the drum 11 can be uniformly roasted by hot air passing through the drum 11 and far-infrared radiation emitted from the drum 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roasting drum unit for roasting coffee beans and the like, which can roast coffee beans and the like, and a roaster using the same.

[0002]

2. Description of the Related Art When roasting materials such as coffee beans, tea leaves and herbs, a roasting machine is used.

[0003] A conventional roasting machine is mainly composed of a metal roasting container formed in a shallow pan shape. Therefore,
In this method, the material is put into a roasting container, and the roasting container is heated while stirring the material with a spatula or the like, thereby roasting the material in the roasting container.

[0004]

According to the prior art, since the material in the roasting container is only heated through the roasting container, a high degree of skill is required for stirring and controlling the heat. There is a problem that the flavor greatly varies from lot to lot and it is extremely difficult to produce a high quality product.

Accordingly, an object of the present invention is to provide a roasting drum unit for roasting coffee beans and the like, which can stably produce a savory product by rotating a ceramic drum in view of the problems of the prior art. To provide a roasting machine that uses it.

[0006]

According to a first aspect of the present invention, there is provided a ceramic drum and a drive shaft with spokes disposed on a shaft of the drum. The gist of the spoke is to absorb the difference in thermal expansion between the spoke and the drum via the respective leaf springs.

According to a second aspect of the present invention, there is provided a heat insulating case for accommodating the drum unit according to the first aspect of the present invention in a horizontal direction, a hopper for charging a material into the drum, a motor for rotating the drum via a drive shaft, and heating the drum. The gist of the present invention is that the heat insulating case is provided with an opening and closing door for opening and closing the front surface of the drum unit.

The drum unit opens and closes the door,
It may be removable from the heat insulating case.

[0009] The opening and closing door may be provided with a seal ring on the inner surface thereof, and may be capable of moving back and forth in parallel.

Further, the hopper communicates with the drum via a guide tube attached to the opening / closing door, and the guide tube can be switched to discharge exhaust gas through a shutter.

[0011]

According to the first aspect of the invention, since the drum is made of ceramics, a large amount of far-infrared rays is generated when a material is charged and heated. Therefore, the material in the drum is roasted uniformly in a short time by far infrared rays from the drum, and can exhibit an extremely good flavor. In addition, the drum is to be rotated around the shaft via a drive shaft with spokes disposed on the shaft, and the spoke at this time absorbs a difference in thermal expansion with the drum via a leaf spring. There is no risk of damaging the drum. However, the leaf spring may be attached to the tip of each spoke, or each spoke itself may be formed by a leaf spring, and an intermediate portion thereof may be bent. In the present invention, the term "made of ceramics" includes, for example, those formed by spraying or coating ceramics on the surface of a metal material in addition to those formed entirely of ceramics.

According to the second aspect of the invention, the heat insulating case houses the drum unit according to the first aspect of the present invention laterally through an opening / closing door, and the drum of the drum unit is driven to rotate by a motor and heated by a burner. Therefore, the material fed into the drum via the hopper can be automatically and uniformly roasted. The processed material may be discharged by opening the opening / closing door, or may be opened by discharging the auxiliary door attached to the opening / closing door.

If the drum unit can be removed from the heat-insulating case, the drum unit can be easily replaced and maintained as needed, and can be used separately depending on the material to be roasted.

When a seal ring is attached to the inner surface of the door, the drum rotates while sliding on the seal ring,
For example, there is no risk that fine ingredients such as sesame and tea leaves leak out of the drum during roasting.

The openable and closable door, which can be moved back and forth, can be quickly opened and closed by combining with an appropriate drive mechanism, and is excellent in hermeticity.

If the hopper communicates with the drum via the guide cylinder, the material from the hopper can be easily charged into the drum without opening the opening / closing door, and if the guide cylinder is switched for exhaust gas discharge, In addition, the heating air from the burner can be efficiently circulated in the drum. However, the drum at this time shall have an opening with a net at the bottom.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

Drum unit 10 for roasting coffee beans and the like
Is a ceramic drum 11 and an axis C of the drum 11
It is provided with a drive shaft 12 arranged above and spokes 13, 13,... (FIGS. 1, 2).

The drum 11 is formed in a deep bowl shape having a bottom 11a and a tapered body 11b having a slightly larger diameter on the mouth side. The bottom 11a has an opening 11a1 on the axis C.
And openings 11a2, 11a2 arranged around axis C
, And a rib 11a3 on the lower surface are formed.
In b, small holes 11b1, 11b1,... are formed on the same circumference. The drive shaft 12 has a small-diameter portion 12a formed at the tip, and penetrates the drum 11 in the direction of the axis C through an opening 11a1 in the bottom 11a. Bosses 12b, 12c are connected to the drive shaft 12 via set screws 12b1, 12c1, respectively.
c is attached. Are inserted into the sockets 12b2 of the bosses 12b, and the small-diameter portions 13a at the tips are engaged with the small holes 11b1.
They are arranged radially in the radial direction of the drum 11. At the tip of each spoke 13, along the inner surface of the drum 11,
A stirring blade 14 slightly shorter than the height of the body 11b is attached,
A leaf spring 13b is attached to the small diameter portion 13a.

The spokes 13, 13,...
The drive shaft 12 is positioned on the axis C of the drum 11 via c, 13c. The leaf springs 13b, 13b...
Respectively resiliently contact the inner surface of the drum 11 and can absorb the difference in thermal expansion between the spoke 13 and the drum 11.

The boss 12c has an engagement groove 12c2 formed on the rear end surface thereof.
a1. A frame plate 1 for the net 15 is provided on the front end face of the boss 12c via set screws 15a1, 15a1,.
5a are screwed, and the net 15 is fixed to the front surfaces of the openings 11a2, 11a2,... Via a frame plate 15a. The drive shaft 12 is provided with a pressing spring 16 mounted on a boss 12c via a nut 16b.
Constrained in both directions. However, the presser spring 16
Are provided at both ends thereof with protrusions 16a, 1g engaging with the rib 11a3.
6a are formed.

The drum unit 10 is housed horizontally in the heat insulating case 20 and can be combined with the hopper 31, the motor 41 and the burner 51 to constitute a roasting machine for coffee beans or the like (FIGS. 3 and 4).

The heat insulating case 20 is installed on a common base material 71 together with the cyclone 60 for separating solids such as cinders. The heat insulating case 20 includes a case main body 21.
The front panel 22 is provided in front of the
2 is formed by assembling an open / close door 23. A processing chamber S for accommodating the drum unit 10 is formed in an upper portion of the case main body 21, and a heat insulating material 2 is provided around the processing chamber S.
1a is arranged. Further, the front panel 22 and the opening / closing door 23 are also formed to be heat insulating. A burner case 21b with a flameproof net 21c is provided at the bottom of the processing chamber S.
The burner 51 is installed in the burner case 21b toward the processing chamber S. An air inlet (not shown) for introducing air into the burner case 21b is formed on a side surface of the case body 21, and an air passage 2 is formed at the bottom of the case body 21 through a partition plate 21d1.
1d is formed.

The boss 1 of the drive shaft 12 is provided on the rear wall of the processing chamber S.
A bush 21e conforming to 2c is incorporated. A coupling 21g that engages with and engages with the engagement groove 12c2 of the boss 12c is inserted into the bush 21e, and a shaft 21f of the coupling 21g is rotatably supported by a bearing 21f1, and is connected to a base material via a chain 41a. 71 is connected to the motor 41.

The front panel 22 has a set screw 23
The opening / closing door 23 that opens and closes the processing chamber S and the front surface of the drum unit 10 is screwed through a, 23a,. A handle 2 is provided at the center of the door 23 via a bracket 23b.
A bush 23d that fits the small diameter portion 12a of the drive shaft 12 is provided on the bracket 23b coaxially with the bush 21e and the coupling 21g on the case body 21 side. The inner surface of the door 23 faces the mouth of the drum 11 with a very small gap d.

The opening / closing door 23 has a viewing window 23e,
f is attached. The viewing window 23e is fixed via a tubular member 23e1, and the receiving tray 23f is protruded inside the opening / closing door 23 via a stopper 23f2 with a handle 23f3 so as to be detachable from the outside of the opening / closing door 23. It is installed. An auxiliary door 23g that opens upward through a hinge 23g1 is provided below the opening / closing door 23.
An operation lever 23g2 with a weight 23g3 is protruded from g.

On the front surface of the heat insulating case 20, a supporting case 2 is provided.
5, a tray 24 is detachably installed below the door 23. The bottom of the tray 24 is formed to be air-permeable, and the support case 25 communicates with the air passage 21 d through an opening 22 a at the lower part of the front panel 22. The opening 22a is provided with a shutter 22b. At an upper portion of the opening / closing door 23, a guide cylinder 32 that opens to the processing chamber S is provided obliquely upward. Guide tube 32
Communicates with the upper hopper 31 via the shutter 33 and branches off and communicates with the rear cyclone 60 via an exhaust pipe 65 with a shutter 65a.

The cyclone 60 includes an outer cylinder 61 installed on a base member 71 via mounts 61a, 61a, and an outer cylinder 61.
And an air duct 64 inserted upward into the outer cylinder 61 and the inner cylinder 62. Exhaust cylinder 6 for outer cylinder 61
5 is provided with a downwardly directed guide piece 65b, and an exhaust duct 63 is provided with an exhaust fan 63b having a motor 63c mounted on the inner cylinder 62 and the air guide 64 in a downward direction. Further, the air guide 64 is connected to the air passage 21 d of the heat insulating case 20.

The roaster is used as follows.

When the drum unit 10 is set in the processing chamber S of the heat insulating case 20, the set screws 23a, 23a
Are removed, the opening / closing door 23 is removed from the front panel 22, the front surface of the processing chamber S is opened (two-dot chain line in FIG. 4), and the boss 12c of the drive shaft 12 is inserted into the bush 21e and connected to the coupling 21g. At the same time, the opening / closing door 23 is mounted on the front panel 22 so that the small diameter portion 12a of the drive shaft 12 is inserted into the bush 23d, and the processing chamber S is closed. At this time, the drum 11 and the drive shaft 12
1e, 23d so as to be rotatable, and the guide cylinder 3
2 is opened at the upper part of the front of the drum 11 and has an auxiliary door 23g.
Corresponds to the lower front part of the drum 11.

When the shutter 33 is opened (two-dot chain line in FIG. 3), the material from the hopper 31 can be charged into the drum 11 through the guide cylinder 32, and the motor 41 is driven by the chain 41a and the drive shaft 12 , The drum 11 can be rotationally driven, and the material in the drum 11 can be uniformly stirred through the stirring blades 14, 14,. On the other hand, the shutter 33
Is closed, the shutter 65a is opened (solid line in the figure), and the burner 51 is ignited by operating the exhaust fan 63b, so that the burner 51 can heat the drum 11. However, it is preferable that the drum 11 be appropriately preheated before the material is charged.

The heating air from the burner 51 is introduced into the drum 11 through openings 11a2, 11a2,... Guide cylinder 32, exhaust cylinder 6
5. The air is discharged from the exhaust duct 63 to the outside via the outer cylinder 61 and the inner cylinder 62. That is, the guide cylinder 32 is
3 can be closed and the shutter 65a can be opened to switch to exhaust gas discharge. The ceramic drum 11 generates a large amount of far-infrared rays and can roast the material inside quickly and uniformly.

When the roasting of the material is completed, the burner 51 is extinguished, the drum 11 is stopped, and the auxiliary door 23g is opened (two-dot chain line in FIG. 3).
To be discharged. At this time, the exhaust fan 63b sucks air through the air guide 64, the air passage 21d, and the support case 25 by closing the shutter 65a and opening the shutter 22b (shown by a two-dot chain line in FIG. Material can be rapidly cooled. When the material in the tray 24 is being cooled, the next material may be roasted in the processing chamber S. Also, the drum unit 10
By removing the opening / closing door 23 and pulling out the boss 12c of the drive shaft 12 from the bush 21e, the whole including the drum 11 can be taken out to the front of the processing chamber S.

The roasting state of the material in the drum 11 can be monitored through the viewing window 23e, and a sample can be extracted and observed using the tray 23f. In addition, an automatic control device for detecting the temperature in the drum 11 and controlling the heating power of the burner 51 may be provided, or a timer for setting the roasting time may be provided.

[0035]

[Other Embodiments] In the drum unit 10, each of the spokes 13, 13,... In the drum 11 can be formed by a leaf spring (FIG. 5). Each spoke 13
Is formed by bending the intermediate portion into a V-shape and attaching the mounting piece 12b3 of the boss 12b through a set screw 13c inserted into the elongated hole 12b4.
It is connected to. At the tip of each spoke 13, in addition to the stirring blade 14, a curved plate 13d is screwed to the inner surface of the drum 11b of the drum 11 via a set screw 13d1. Therefore, the spokes 13, 13... Can adjust the length appropriately to position the drive shaft 12 on the axis C, and can absorb a difference in thermal expansion with the drum 11 through an intermediate bent portion.

The drum 11 may be formed by connecting ceramic drum pieces 11c in a cylindrical shape (FIGS. 6 and 7). The drum pieces 11c, 11c... Are connected by fitting the side end portions of the concave and convex portions on both sides to each other, and a retaining ring 11e at the mouth, an intermediate inner ring 11f, and a pressing spring 11g.
It is held in a cylindrical shape via guides 11d3, 11d3 of the bottom plate 11d.

The bottom plate 11d has an opening 11 provided with a net 15.
.. are formed. Also, the bottom plate 11d
Guides 11d3, 11d3 are inner and outer corrugated spring members 1
The drum pieces 11c, 11c... Are held at the bottom side via 1d2, 11d2. The holding ring 11e is formed in a channel shape in cross section, holds the mouth sides of the drum pieces 11c, 11c,... Via corrugated spring members 11e1, 11e1, and arms 11e2, which are connected to the spokes 13, 13,.
Are protruded inward. The holding ring 11e and the bottom plate 11d are connected via stirring blades 14, 14 arranged along the drum pieces 11c, 11c.

The inner ring 11f is fixed by stirring blades 14, 14, and radial spokes 12e, 12e,... Are disposed in the middle of the drive shaft 12 via bosses 12d corresponding to the inner ring 11f. ing. Each spoke 12e is provided with a leaf spring 12f that resiliently contacts the inner ring 11f. Also, 11g of holding spring
Are drum pieces 11c, 11c corresponding to the inner ring 11f.
... is tightened from the outside. However, the inner ring 11
f, presser spring 11g, spokes 12e, 12e ...
The related members may be provided as needed, and all of them may be omitted.

The drum pieces 11c, 11c,... May be connected via inner and outer steps formed on both side end faces (FIG. 8).
(A)) and may be formed in a small diameter pipe shape (FIG. (B)). The pipe-shaped drum pieces 11c, 11c ...
Can be arranged in a cylindrical shape without any gap through the retainer 11c3 (FIGS. 7B and 7C). Further, a protective net 19 may be provided on the outer periphery of the drum 11 (FIG. 9). The mesh 19 makes the temperature distribution of the drum 11 being heated uniform, and prevents the fragments from being scattered when the drum 11 is damaged. The stirring blades 14, 14
May be directly fixed to the inner surface of the drum 11b of the drum 11 via set screws 14a, 14a, respectively (FIG. 1).
0).

In the above description, the drum 11 and the drum pieces 11c, 11c... May be made of a metal material such as stainless steel, for example, instead of being made of a ceramic material. Good.

A coupling 17 is attached to the shaft end of the drive shaft 12 via a set screw (not shown) (FIG. 11).
a, pin 21g2, 21 of coupling 21g to 17a
g2 may be engaged and removably connected. The bush 21e has an engagement groove 17b formed on the outer periphery of the coupling 17.
The ball plunger 21h corresponding to is incorporated. Therefore, when the coupling 17 is inserted into the bush 21e to couple the drive shaft 12 to the shaft 21f, the ball plunger 21h can be engaged with the engagement groove 17b to be lightly locked.

A heat-resistant seal ring 27 may be provided on the inner surface of the door 23 (FIG. 12). Seal ring 2
Reference numeral 7 denotes a bracket 23 b formed to correspond to the diameter of the drum 11 and supporting the small-diameter portion 12 a of the drive shaft 12;
It is arranged concentrically with 3d. The seal ring 27
Drum 11 via ball plungers 27a, 27a.
, And the drum 11 rotates while sliding on the seal ring 27 without forming the gap d.
Therefore, there is no possibility that the fine material in the drum 11 leaks out during roasting. At this time, the stirring blades 14, 14,... In the drum 11 may protrude into the seal ring 27 (FIG. 2).

The boss 12c on the drive shaft 12 has a modified nut 17c mounted on the coupling 17 and a modified nut 17c.
(c). The fixing ring 17d is provided inside the drum 11 with a set screw 17d1.
And is fixed on the drive shaft 12 through the
7d, each end surface of the modified nut 17c on the side facing the boss 12c is finished to a spherical surface compatible with the front and rear end surfaces of the boss 12c. Therefore, the deformed nut 17c and the fixing ring 17d can appropriately set the inclination of the drum 11 with respect to the drive shaft 12 via the boss 12c, and when the drive shaft 12 is driven to rotate, the drum 11 swings with respect to the seal ring 27. Can be adjusted to a minimum.

The opening / closing door 23 can be moved back and forth with respect to the front panel 22 via upper and lower slide rods 26a, 26a (FIGS. 13 and 14). However, FIGS. 14A and 14B are a front explanatory view corresponding to the arrow Y in FIG. 13 and an enlarged sectional view corresponding to the arrow ZZ in FIG. 13, respectively.

The slide rods 26a, 26a penetrate the guide block 26b on the side surface of the case body 21 so as to be slidable back and forth, and support the open / close door 23 via the hinges 26c, 26c attached to the tip so as to be able to open and close. I have. The slide rods 26a, 26a are connected to a common connecting rod 26d.
Is connected to one end of a bell crank 26f on the rear surface of the case main body 21. However, bell crank 26f
Is supported via a bracket 26e so as to be horizontally swingable. A socket 26g attached to the other end of the bell crank 26f has an operating rod 26k together with a compression spring 26h.
The socket 26g is closed via a stopper 26g1. Operation rod 26k
In the figure, the engaging pin 26k1 is inserted in the middle part,
6k1 can be passed back and forth through the pin hole 26k3 of the bracket 26k2 by appropriately rotating the operation rod 26k (two-dot chain line in FIG. 14B).

Therefore, the slide rods 26a, 26a
Is to connect the engaging pin 26k1 to the pin hole 2 of the bracket 26k2.
By pushing the operating rod 26k corresponding to 6k3 (in the direction of arrow K1 in FIG. 13), the bell crank 26
f, the door 23 can be moved forward in parallel and the door 23 can be moved forward in parallel (two-dot chain line in the figure). At this time, the door 23 is connected to the front of the processing chamber S via the hinges 26c, 26c. Can be opened (the dashed line in FIG. 14, FIG. 14).
(A). At this time, the slide rods 26a, 26a are held forward by the ball plungers 26b1 incorporated in the guide blocks 26b, respectively, engaging the engagement grooves 26a1.

The slide rods 26a, 26a are set by setting the opening / closing door 23 in parallel with the front panel 22 and pulling the operation rod 26k (arrow K1 in FIG. 13).
Direction), the front side of the processing chamber S can be closed by moving the opening / closing door 23 rearward in parallel. The operating rod 26k is moved by engaging the engaging pin 26k1 through the pin hole 26k3 and engaging and locking the bracket 26k2 (each solid line in FIGS.
The door 23 can be urged toward the front panel 22 via 6h.

On the front surface of the front panel 22, an operation knob 22c1 and a lock arm 22 with a holding bolt 22c are provided.
d, 22d may be attached to be able to swing up and down (FIG. 1).
3, FIG. 14 (A)). The lock arms 22d, 22d
The holding bolt 22c is positioned on the front surface of the opening / closing door 23 (solid line in FIG. 14A), and the holding bolt 22c is screwed through the operation knob 22c1 to bring the opening / closing door 23 into close contact with the front panel 22 and the operation knob 22c1. Then, the holding bolt 22c is retracted from the front surface of the door 23 (two-dot chain line in the figure) to allow the door 23 to open and close.

The slide rods 26a, 26a may urge the door 23 rearward via the compression springs 26a2, respectively (FIG. 15). Each slide rod 26a is incorporated in the case body 21 together with the guide block 26b, and the compression spring 26a2 is
And a stopper 26a3 of the slide rod 26a. An engagement arm 26a4 that is bent toward the rear of the case body 21 is attached to the slide rod 26a so as to be horizontally swingable, and a side surface of the case body 21 is engaged with the tip of the engagement arm 26a4. Joint rib 21
k and 21k are arranged before and after.

Therefore, the compression spring 26a2 can press the closed door 23 against the front surface of the case body 21 via the slide rod 26a. Further, the slide rods 26a, 26a are advanced respectively against the compression springs 26a2 (two-dot chain line in FIG. 15), and the opening / closing door 23 is moved forward in parallel to open the front surface of the case main body 21, and the engagement arm 26a4 Can be engaged with the front engagement rib 21k to hold the opening / closing door 23 at the forward position. In addition,
When the door 23 is moved backward, the engaging arm 26a4 is opened outward, disengaged from the front engaging rib 21k, returned to the original position and engaged with the rear engaging rib 21k.

The heat insulating case 20 may house a plurality of drum units 10, 10,... In the processing chamber S (FIGS. 16, 17). A coupling 21 is provided on the rear wall of the heat insulating case 20.
g are assembled vertically and horizontally, and the shafts 21f, 21f are gears 21f2, 21f2.
.. Are connected to another shaft 21m via a common gear 21m1. The shaft 21m is connected to the motor 41 via a chain 41a. Burners 51, 51 are vertically installed in the processing chamber S of the heat insulating case 20, and each burner 51 has a fuel pipe 51a and an air pipe 51b.
Is connected.

The hopper 31 is connected to the drum 11 in the processing chamber S,
11 ..., guide cylinders 32, 32 with shutters 33
... are communicated individually. Each shutter 33
Can be lightly locked in the open state (two-dot chain line in FIG. 16) and the closed state (solid line in FIG. 16) by engaging with the engagement block 33a on the case body 21. The hopper 31
A partition plate 31 for partitioning the interior for each guide tube 32
a, 31a ... are installed. Further, the opening / closing door 23 is provided with auxiliary cylinders 65c corresponding to the respective drums 11, and the auxiliary cylinders 65c, 65c.
Outer cylinder 6 of cyclone 60 via exhaust cylinder 65 with 5a
1 connected. The auxiliary cylinders 65c, 65c,.
When the processing chamber S is closed by the opening / closing door 23, they are inserted into the corresponding exhaust pipes 65 and connected. Further, the shutter 65a of each exhaust pipe 65 can be individually opened and closed.

The door 23 has auxiliary doors 23g, 23g,... In addition, a fan 18 that rotates with the drum 11 via a drive shaft 12 and a boss 12c is attached to a rear portion of each drum 11,
The fan 18 stirs the heated air from the burners 51 and 51 to equalize the temperature in the processing chamber S.

The shutters 33 are individually opened and closed to open the hopper 31.
Are supplied to each drum 11 and the drums 11, 11... Are simultaneously rotated via a motor 41, and the burners 51, 51 are ignited to heat the drums 11, 11,. … The ingredients inside can be roasted at once. Also, the shutter 65 of the exhaust pipes 65, 65...
a, 65a... individually adjust and set the heating air passing through each drum 11 by adjusting the discharge amount of the exhaust gas,
The roasting state of the material can be uniformly adjusted.

[0055]

As described above, according to the first aspect of the present invention, by combining a ceramic drum and a drive shaft disposed on the shaft of the drum,
Since the material in the drum can be roasted uniformly in a short time by far infrared rays from the drum, there is an excellent effect that an extremely savory product can be stably manufactured.

According to the second invention, by combining the heat insulating case for accommodating the drum unit according to the first invention with the hopper, the motor and the burner, the material is roasted while rotating the drum unit to obtain a high quality product. Can be produced efficiently.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a drum unit.

FIG. 2 is a longitudinal sectional view of a drum unit.

FIG. 3 is a longitudinal sectional view of the entire configuration of the roasting machine.

FIG. 4 is an enlarged sectional view corresponding to the line AA in FIG. 3;

FIG. 5 is an enlarged perspective view of a main part showing another embodiment (1).

FIG. 6 is a perspective explanatory view showing another embodiment.

FIG. 7 is an enlarged cross-sectional view corresponding to the line XX of FIG. 6;

FIG. 8 is an enlarged sectional explanatory view of a main part showing another embodiment.

FIG. 9 is a perspective view of a main part showing another embodiment.

FIG. 10 is an enlarged perspective view of a main part showing another embodiment (2).

FIG. 11 is an enlarged cross-sectional view of a main part showing another embodiment (1).

FIG. 12 is an enlarged sectional view of a main part showing another embodiment (2).

FIG. 13 is an explanatory cross-sectional view of the overall configuration showing another embodiment.

FIG. 14 is an explanatory diagram of a main configuration of FIG.

FIG. 15 is an enlarged cross-sectional view of a main part showing another embodiment.

FIG. 16 is a longitudinal sectional view of a main part showing another embodiment.

FIG. 17 is an explanatory front view of FIG. 16;

[Explanation of symbols]

 C: shaft 10: drum unit 11: drum 12: drive shaft 12e, 13: spoke 12f, 13b: leaf spring 20: heat-insulating case 23: opening / closing door 27: seal ring 31: hopper 32: guide cylinder 33, 65a: shutter 41: Motor 51 ... burner

Continued on the front page (72) Inventor Motoaki Watanabe 13-21 Kenrokumotocho, Kanazawa-shi, Ishikawa F-term (reference) 4B027 FB21 FC01 FC02 FQ02 4B061 AA01 BA09 CD07 CD19 CD20

Claims (6)

[Claims] 1. A device comprising a ceramic drum and a spoked drive shaft disposed on a shaft of the drum.
A drum unit for roasting coffee beans or the like, wherein each of the spokes absorbs a thermal expansion difference with the drum via a leaf spring. 2. A heat insulating case for accommodating the drum unit according to claim 1 in a lateral direction, a hopper for charging a material into the drum, a motor for rotating the drum via the drive shaft, and heating the drum. A roasting machine for coffee beans or the like, comprising: a burner; and an opening / closing door that opens a front surface of the drum unit in the heat insulating case. 3. The roasting machine for coffee beans and the like according to claim 2, wherein the drum unit opens the opening / closing door and is detachable from the heat insulating case. 4. The roasting machine for coffee beans or the like according to claim 2, wherein the opening / closing door has a seal ring attached to an inner surface thereof. 5. The roasting machine for coffee beans or the like according to claim 2, wherein the opening and closing door is capable of moving back and forth in parallel. 6. The hopper communicates with the drum via a guide cylinder attached to the door, and the guide cylinder includes:
The roasting machine for coffee beans or the like according to any one of claims 2 to 5, wherein the roaster is switched to discharge exhaust gas through a shutter.