JPH0425996Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an apparatus for roasting granular materials such as coffee beans.

<Prior Art> Coffee bean roasting devices have been provided for some time, but most of them were for commercial use, and there were not many roasting devices for home use.

For example, Japanese Utility Model Publication No. 56-18303 provides a roaster that can also be used for home use. This roaster is designed so that the roasting container can be rotated, and the roasted beans can be easily and completely discharged.

<Problems to be solved by the invention> However, in conventional devices such as the above device, there was a problem that high temperature was transmitted to the motor side through the shaft of the stirring blade inside the roasting pot, causing the motor to heat up. If the rotation of the stirring blade is temporarily stopped due to interference such as beans, or if a large amount of resistance acts on the rotating blade, there is a problem in that it applies a large load to the motor through the shaft of the rotating blade. Ta.

On the other hand, the movement of beans by the stirring blades is slower near the center of the roasting pot (roasting container), so the problem of beans in the center being over-roasted compared to the surrounding beans has traditionally been more common. Ta.

<Purpose> Therefore, the present invention solves the problems of the above conventional device,
The stirring blade can be rotated smoothly even against interference caused by beans, it can buffer the increase in load on the motor, and it can also protect the motor from heat from the roasting pot side. To provide a device for roasting granular materials such as coffee beans, which can roast coffee beans and the like uniformly in a roaster.

<Means for Solving the Problems> In order to achieve the above object, the apparatus for roasting granular materials such as coffee beans of the present invention includes a roasting pot equipped with a heater 12 and a stirring blade 10, and a roasting pot equipped with a heater 12 and a stirring blade 10. At least a motor 18 for rotation is provided, and springs 11 and 17 having elasticity in the rotation direction of the shafts 8 and 18a are fixed to the rotation shaft 8 of the stirring blade 10 and the drive shaft 18a on the motor 18 side, respectively. , end piece 1 of each spring 11, 17
The first feature is that 1a and 17a are brought into contact with each other in the rotational direction.

In addition to the first feature, the device for roasting granular materials such as coffee beans of the present invention has a ring-shaped heater 12 arranged at the upper part of the roasting pot, and a stirring blade near the center of the roasting pot. The second feature is that an umbrella-shaped heat ray shielding member 9 is erected upward from the center of rotation of the device 10 .

<Operation> According to the first feature, the rotating shaft 8 side of the stirring blade 10 and the drive shaft 18a side of the motor 18 are in contact with each other only through the end pieces 11a and 17a of the spring, so that the stirring blade 10 is removed from the roasting pot. Most of the heat that would otherwise be conducted to the motor through the rotating shaft 8 is blocked. In addition, since the rotation of the motor 18 is transmitted to the stirring blade 10 side via the end pieces 11a and 17a of the spring, the rotation of the stirring blade can be made flexible, and the beans will fit between the stirring blade 10 and the roasting pot. Even if it gets stuck and becomes a temporary obstacle, the obstacle can be resolved and smooth rotation can be ensured. Further, the load caused by the temporary rotational disturbance is not immediately transmitted to the motor, and the temporary disturbance is resolved in the meantime.

Further, according to the second feature, the heat ray shielding member 9
By the umbrella, the heat rays from the heater 12 are appropriately shielded from the beans near the center of the roasting pot, which have a small amount of movement. Can be roasted evenly.

<Example> FIG. 1 is a longitudinal cross-sectional view of an apparatus for implementing the present invention.

1 is a main body of a roasting device, and a roasting pot is disposed on the main body 1. The roasting pot is a double pot consisting of an outer pot lower part 2, an outer pot upper part 3, an inner pot lower part 4, and an inner pot upper part 5, and the outer pot lower part 2 and the inner pot lower part 4 are combined. A through hole through which the rotating shaft 8 of the stirring blade 10 passes is formed in the center of the bottom of the stirrer, and the bearing 6 of the rotating shaft 8 is fitted into the through hole. By screw-fitting a bearing nut 7 into the bearing 6, the outer hook lower portion 2 and the inner hook lower portion 4 are sandwiched between both 6 and 7.

A stirring blade 10 located near the center of the roasting pot
A heat ray shielding member 9 whose upper end expands into an umbrella shape is erected at the center of rotation. This heat ray shielding member 9 appropriately blocks the heat rays emitted from the ring-shaped heater 12 placed above the inside of the roasting pot to the vicinity of the center of the roasting pot, and the degree of roasting of the beans gathered near the center is is alleviated. Beans near the center are less moved by the stirring blade 10 and tend to be over-roasted compared to beans in the periphery; however, the heat ray shielding member 9
This allows beans near the center and beans near the periphery to be roasted to the same degree.

The rotating shaft 8 of the stirring blade 10 has a grease groove, and a spring 11 having elasticity in the rotating direction of the shaft 8 is fixed near its lower end.
One end piece 11a is provided to protrude laterally in an L-shape. On the other hand, a spring 17 having elasticity in the rotating direction of the shaft 18a is fixed near the upper end of a drive shaft 18a of a motor 18 which is a driving means for the stirring blade 10, and an end piece 17a of the spring 17 is provided to protrude laterally. The end piece 17a and the end piece 11a are brought into contact with each other in the rotational direction. The rotation shaft 8 of the stirring blade 10 and the drive shaft 18 of the motor 18
a and end pieces 11a and 17 of springs 11 and 17
Since the contact is made only with a, the heat of the roasting pot is transferred to motor 1.
8 is almost prevented from being conducted. End piece 11
a and 17a are thin and easily dissipate heat. Also, the rotational driving force by the motor 18 is applied to the springs 11, 1.
7 to the stirring blade 10, the rotation of the stirring blade 10 is flexible, and even if beans get stuck between the stirring blade 10 and the roasting pot and cause a temporary obstruction, This obstacle can be eliminated to ensure smooth rotation. Furthermore, the load caused by the temporary rotational disturbance is not immediately transmitted to the motor, and the temporary disturbance is resolved in the meantime. Note that by providing a grease groove on the rotating shaft 8, it is possible to prevent the shaft 8 from seizing with the bearing 6 even if the shaft 8 reaches a high temperature.

A plurality of outer skin discharge holes 1 are provided on the 4 sides of the lower part of the inner pot.
3, and the opposite side has a roasted bean outlet 1.
There are 4. The outlet 14 is opened and closed by a cover pivotally attached to a hinge 15. The outer skin discharge hole 13
A skin receiving container 19 is removably provided on the main body 1. Further, a bean receiving container 20 is detachably provided in the main body 1 for the bean outlet 14. The bean receiving container 20 is equipped with a push button 21 at the center of the front and a leaf spring 22 on the back side. Usually, the bent end of the leaf spring 22 hits the end of the bent part of the cover 16, and the outlet 14 is closed. . When the push button 21 is pressed, the rod 23 rotates the leaf spring 22 to release the lock.
The cover 16 opens the discharge port 14 by its own weight.

The stirring blade 10 evenly stirs the beans in the roasting pot and drops the outer skins of the beans from the discharge hole 13 into the skin receiving container 19. In addition, 24 is a lid, 25 is a knob, 2
6 is the bottom, 27 is a timer, 28 is a washer, 29 is a switch, 30 is a guard, 31 is a cord with a plug,
32 is Bushing.

<Effects> The present invention has the above configuration, and the first claim
According to the device for roasting granular materials such as coffee beans described in Section 1, the rotating shaft 8 side of the stirring blade 10 and the drive shaft 18a side of the motor 18 are connected to the end pieces 11a and 17 of the spring.
Since they are in contact only at point a, it is possible to block most of the heat that attempts to be conducted from the roasting pot to the motor side through the shaft 8 of the stirring blade 10, thereby protecting the motor 18 from heat and increasing its durability. I can do it. Moreover, since the rotation of the motor 18 side is transmitted to the stirring blade 10 side via the end pieces 11a and 17a of the spring, the rotation of the stirring blade 10 can be made flexible, and the beans can be transferred between the stirring blade 10 and the roasting pot. Even if you get stuck in between and become a temporary obstacle,
This obstacle can be eliminated to ensure smooth rotation. Furthermore, since the load caused by the temporary rotational disturbance is buffered by the springs 11 and 17, the durability of the motor can be increased.

Further, according to the apparatus for roasting granular materials such as coffee beans as set forth in claim 2, the umbrella of the heat ray shielding member 9 prevents the heat rays from the heater 12 from reaching the less mobile beans near the center of the roasting pot. Since the beans are appropriately shielded, over-roasting of the beans near the center of the roasting pot is alleviated, and the whole beans can be roasted uniformly.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an apparatus for implementing the present invention. 8... Rotating shaft, 9... Heat ray shielding member, 10...
Stirring blade, 11, 17... Spring, 11a,
17a...end piece, 12...heater, 18...motor, 18a...drive shaft.

Claims (1)

[Claims for Utility Model Registration] (1) A roasting pot equipped with a heater 12 and a stirring blade 10, and at least a motor 18 for rotating the stirring blade 10;
the rotating shaft 8 and the driving shaft 18 on the motor 18 side.
Spring 11, 17 having elasticity in the direction of rotation of shaft 8, 18a is fixed to each of a, and end piece 11a of each spring 11, 17,
A device for roasting granular materials such as coffee beans, characterized in that 17a are in contact with each other in the rotational direction. (2) A ring-shaped heater 12 is placed at the top of the roasting pot, and a stirring blade 1 is placed near the center of the roasting pot.
Umbrella-shaped heat ray shielding member 9 upward from the rotation center of 0
A device for roasting granular materials such as coffee beans as set forth in Claim 1 of the Utility Model Registration Claim.