JPH0278Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a coffee bean roasting machine.

[Prior Art] Conventionally, this type of roasting machine includes a hot air type roaster and a heat radiation type roaster. Among these, the heat radiation type is superior in that it imparts coffee flavor, body, sweetness, etc.

[Problems with the invention] The present invention is an improvement on such a heat radiation type roaster, which enables more uniform roasting and makes it easier to take out the coffee beans after roasting. The purpose of the present invention is to provide a coffee bean roasting machine that can roast coffee beans.

[Means for Achieving the Object] The coffee bean roasting machine according to the present invention has a cylindrical drum with a blade plate for stirring coffee beans inside and a large number of small holes on the circumference, and a rotating shaft with an inclined axis. The lower end of the drum is rotatable with the drum through a bearing mechanism that is attached to the rotary shaft and is slidable in the axial direction of the rotary shaft. A bottom plate is provided so that the opening can be opened and closed, and a drive mechanism using an electromagnetic solenoid that slides the bottom plate in the axial direction via the bearing mechanism is provided.

[Example] Examples of the present invention will be described below.

FIG. 1 shows a cross-sectional view of an embodiment of the present invention.

A cylindrical drum 3 is fixed to a rotating shaft 21 of a rotary drive mechanism 2 that is fixedly installed in the casing 1 so that the rotating shaft is inclined. As shown in the perspective view in FIG. 2, the drum 3 has an open top surface, a number of small holes 31 on the side surfaces, and an open bottom surface except for a frame 32 for attaching it to the rotating shaft 21. ing. Furthermore, several vanes 33 are provided inside the drum 3 to stir the coffee beans. A circular bottom plate 23 is loosely fitted to the rotating shaft 21 via a bearing mechanism 22 so as to be slidable in the axial direction.

The bearing mechanism 22 includes a bearing 221 that is slidably coupled to the rotating shaft 21 in the axial direction;
It consists of a sleeve 222 attached to the outer periphery of this bearing 221 and an E-ring 223 fixed to the bearing 221.

As will be described later, the bottom plate 23 is formed by the bearing mechanism 22 being driven in the axial direction by the frame 24.
It is driven to open and close the opening on the lower surface side of the drum 3.

A frame 24 is further integrally attached to the sleeve 222 by fitting, and this frame 24 is separated from the drum 3 along the rotating shaft 21 by an electromagnetic solenoid mechanism 4 (the one on the right side is not shown). It is configured to obtain. That is, the frame 24 is driven away from the drum 3 by energizing the electromagnetic solenoid mechanism 4, and returns to its original position by the spring 25 when the energization is cut off.

When the electromagnetic solenoid mechanism 4 is de-energized, the frame 24 is urged upward by the spring 25, so that the bearing mechanism 22 is also in an upwardly moved position. In this state, the bearing mechanism 22 presses the bottom plate 23 against the frame 32 of the drum 3, and when the drum 3 rotates, the bottom plate 23 also rotates.
On the other hand, when the electromagnetic solenoid mechanism 4 is energized while the rotation is stopped, the frame 24 moves downward and the bearing mechanism 22 also moves downward along the rotating shaft 21. As a result, the bottom plate 23, which is loosely fitted onto the rotating shaft 21, moves downward. also moves downward to open the lower surface of the drum 3.

FIG. 3 shows the open state of the lower surface of the drum 3.
This opening/closing is performed when the coffee beans stored in the drum 3 are discharged after roasting is finished. The coffee beans are carried in through a hopper 11 provided in the casing above the opening of the drum 3. Note that the small hole 231 provided in the bottom plate 23 and the small hole 3 of the drum 3
Needless to say, 1 is smaller than a coffee bean.

A far-infrared heater 5 is disposed above the upper end opening of the drum 3. Further, a nichrome wire heater 6 is disposed in a side area of the drum 3 at a position slightly shifted in the rotational direction from the inclined lowermost surface. This means that when drum 3 is rotating,
Since the coffee beans in the drum 3 tend to bunch up in a position that is slightly offset in the rotational direction from the lowest position in the drum 3, this method is designed to efficiently roast coffee beans that are in this concentrated position. be.

The casing 1 is provided with motor fans 13 and 14 for sucking air from an outside air introduction hole 12 and supplying it around the drum 3 along the route shown by the arrow. Further, a chute 15 is provided directly below the drum 3 for guiding the coffee beans to fall when the lower surface side of the drum 3 is opened, and a box body 16 is provided at the lower end of the chute 15 so as to be able to be drawn out from the casing 1. ing. Casing 1 on the upper side of drum 3
is provided with a window 17 made of transparent glass.

Next, the operation will be explained.

At the time of roasting, a predetermined amount of coffee beans is first carried into the drum 3 from the hopper 11. After being carried in, the drum 3 is rotated by the rotary drive mechanism 2, the motor fans 13 and 14 are driven, and the far infrared heater 5 and the nichrome wire heater 6 are energized. In this way, roasting is performed using the radiant heat from the far-infrared heater 5 and the nichrome wire heater 6, and the hot air from the fan 14 in which the air is heated. The roasting state is monitored not only by the time but also by observing the coffee beans through the window 17. When roasting is finished, the rotational drive mechanism 2 and motor fans 13 and 14 are stopped,
Power to the far-infrared heater 5 and the nichrome wire heater 6 is also cut off. Then, the electromagnetic solenoid mechanism 4 is energized, the bottom surface of the drum 3 is opened, and the roasted coffee beans are discharged into the box 16. After the discharge is completed, the power to the electromagnetic solenoid mechanism 4 is cut off, and the same operations as described above are repeated thereafter.

By the way, in the present invention, the bottom plate 23 is made rotatable so that it acts as a part of the drum 3, that is, the bottom plate, but it is also made slidable in the axial direction by interposing the bearing mechanism 22, so that the bottom plate 23 can be rotated. It can also act as a lid body for opening and closing the opening on the lower surface of 3. In the conventional system, either the drum 3 or the bottom plate 23 was fixed in order to smoothly stir the coffee beans, but in this case, if there was a large clearance between the two, fine powder or dregs of the coffee beans could be stored between the two. There were cases where a blockage occurred when the machine was drawn in. If the clearance is made smaller to prevent this, the problem of contact friction arises.

In contrast, in the present invention, the drum 3 and the bottom plate 23 rotate integrally, so the above problem does not occur. Furthermore, since the drum 3 is provided with a blade plate 33, the coffee beans are smoothly stirred by the blade plate 33 as the drum 3 rotates, and uniform roasting is achieved. Further, since the bottom plate 23 is installed to be able to automatically open and close the opening on the lower surface side of the drum 3, it is possible to easily take out the coffee beans after roasting.

[Effects of the invention] As described above, according to the present invention, uniform roasting can be performed, and coffee beans can be easily taken out after roasting.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a perspective view of a drum portion thereof, and FIG. 3 is a sectional view for explaining a mechanism for opening the lower surface of the drum. In the figure, 1 is a casing, 2 is a rotational drive mechanism, and 3
is a drum, 4 is an electromagnetic solenoid mechanism, 5 is a far-infrared heater, 6 is a nichrome wire heater, 7 is coffee beans, 23 is a bottom plate, and 33 is a blade plate.

Claims (1)

[Scope of utility model registration request] A cylindrical drum having a blade for stirring coffee beans inside and a large number of small holes on the circumferential surface is attached to the rotating shaft of a rotational drive source having an inclined rotating shaft,
The rotary shaft is also provided with a bottom plate that is rotatable together with the drum and that can open and close the open lower end of the drum via a bearing mechanism that is inserted into the rotary shaft and is slidable in the axial direction thereof. A coffee bean roasting machine comprising a drive mechanism using an electromagnetic solenoid that slides the bottom plate in the axial direction via a bearing mechanism.