JPS6216866Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a roaster capable of roasting green coffee beans and the like.

(Prior Art) Various roasters of this type have been proposed in which a roasting container containing raw coffee beans is manually rotated and heated by an alcohol lamp or a heating element from below the outside of the container. However, in either case, the roasting container is heated from the outside, so there is a large heat loss, the time spent roasting is long, and the rotation of the roasting container is not constant because it is done manually.
Not only did this result in uneven roasting, but it was also extremely troublesome to work with.

(Purpose of this proposal) This proposal was made in view of the above points, and consists of a roasting container with a storage chamber formed between a transparent outer body and an air-permeable inner body, and a transparent reflective body on the outer body. While the membrane structure is provided, the heating element is located in the inner circumferential body and kept in a fixed state, and the roasting container is rotated around the heating element to increase thermal efficiency and shorten the roasting time. To eliminate uneven rotation by rotating an upper roasting container with a drive source such as a motor, to perform roasting uniformly, and to provide a product which is good in terms of workability.

(Embodiments of the present invention) Examples of the present invention shown in the drawings will be described in detail below.

The roaster shown in the figure is roughly divided into a main body 1, a roasting container 2 for storing food such as coffee beans, and a support base 3 for rotatably supporting the container 2. Each of these parts is constructed as follows. be done.

The device body 1 includes a bottom plate 5 having a plurality of supporting legs 4 on the lower surface, an electrical equipment box 6 mounted on the bottom plate 5 at one end of the plate 5, and a circular box in the center that closes the opening of the box 6. a closing plate 7 having an opening 8; a heating element mounting plate 10 attached to the opening 8 of the closing plate 7 with screws 9; It is equipped with a motor mounting angle 11 which is attached at the same time with screws 9, a low speed motor 12 which is attached to the angle 11, and a heating element 13 such as a sheathed heater whose both ends are supported on a heating element mounting plate 10. The support stand 3 is placed on the upper surface of the bottom plate 5. The motor 12 is a drive source for rotating the roasting container 2, and uses, for example, a gear motor incorporating a speed reduction mechanism to rotate the roasting container 2 at a low speed. The rotation speed of the roasting container 2 should be set within the range of 5 to 60 rpm, especially from the viewpoint of preventing uneven roasting and visual confirmation.
It is most desirable to set it within the ~30rpm range.
That is, if the rotation speed of the roasting container 2 becomes too low,
Coffee beans are not stirred effectively, resulting in uneven roasting, and conversely, if the temperature is too high, it becomes difficult to visually check the progress of roasting, which lacks emotion, so these things should be taken into consideration. Therefore, it is most desirable and practical to set the rotation speed of the roasting container 2 within the range of 10 to 30 rpm.

A joint 15 is attached to the tip of the output shaft 14 of the motor 12 with a screw 16, and the joint 15 is exposed to the outside through the opening in the heating element mounting plate 10. The joint 15 has a cylindrical shape with a bottom, and has, for example, four engaging protrusions 17 formed on its inner bottom surface, while the cylindrical portion 18 acts as a guide portion of the roasting container side joint described later.

The heating element 13 is positioned around the axis of the output shaft 14 of the motor 12 by fixing both ends to the heating element mounting plate 10 and folding the middle part downward.

The roasting container 2 includes a disc-shaped side plate 19 having a flange 20 formed on the outer periphery and a bearing protrusion 21 bulged in the center, and flanges 2 on the outer periphery and the inner periphery.
3 and 24, a flange 20 of the side plate 19, and a flange 23 of the side plate 22.
an outer circumferential body portion 25 whose end portions fit into the inner circumference of the ring and which is located between the side plates 19 and 22; a ring-shaped opening/closing plate 26 which is positioned along the inner surface of the side plate 22 and has a flange 27 formed on the inner circumferential edge; A bearing material 29 is attached to the inner periphery of one end, and the other end is fitted to the outer periphery of the flange 27 of the opening/closing plate 26, and the bearing protrusion 21 of the side plate 19 and the side plate 2
The side plates 19, 22 and the outer circumferential body 25 are integrally fixed by a stirring body or the like described later, and the inner circumferential body 30 is rotatably fitted to the inner circumferential body 2 through a bearing material 29 and a flange 27. is rotatable with respect to the side plates 19, 22, etc. together with the opening/closing plate 26, and forms a coffee bean storage chamber 31 between the inner and outer body parts 30, 25. The roasting container 2 is positioned to contain the heating element 13 and rotates around it.

The side plate 22 forms an arc-shaped operation hole 32 and also forms an entrance/exit 33 for entering and exiting coffee beans. On the other hand, the opening/closing plate 26 has an opening 34 having the same shape as the above-mentioned entrance/exit 33, and in this opening 34, a peel discharge section 35 consisting of a number of holes smaller than coffee beans is formed at appropriate intervals. The rotation selectively aligns the opening 34 and the skin outlet 35 with the inlet/outlet 33. Thus, the opening/closing plate 26 is allowed to rotate within the range of the operating hole 32 by protruding the knob 36 outward through the operating hole 32, and the knob 36 is at an intermediate position B of the operating hole 32. The skin discharge portion 35 is aligned with the opening 34 at one end A, and the blind wall portion at the other end C is aligned with the entrance/exit 33 of the side plate 22.

The outer peripheral body 25 is made of a transparent cylinder made of heat-resistant glass, and a transparent reflective film is formed by applying a substance that reflects heat rays, such as indium, tin oxide, or gold, on the outer peripheral surface by means such as vacuum deposition or hot spraying. form.

The inner peripheral trunk portion 30 is formed into a cylindrical shape by a combination of wire mesh or metal wires, has a breathable structure, and is rotated together with the opening/closing plate 26 by a knob 36.

The fastening rings 37 and 38 have a plurality of holes, for example, three fixing holes 39 and three engaging holes 40, alternately bored in the circumferential direction, and are arranged inside the side plates 19 and 22. A total of six stirring bodies 41 are provided in the shape of a rod, one end of which is fixed to the fixing hole 39 by caulking or the like, and a threaded portion 42 is formed at the other end. Then,
The agitator 41 fixed to the fastening ring 37 has a threaded portion 4
2 is inserted into the rear side plate 22 and engaged with the engagement hole 40 of the tightening ring 38, and the stirring body 41 fixed to the tightening ring 38 has the threaded portion 42 inserted into the engagement hole 4 of the tightening ring 37.
By inserting the screws into the rear side plates 19 that are inserted into and engaged with the rear side plates 19 and screwing the nuts 43 into the threaded portions 42, the side plates 19, 22, the outer body 25, etc. are tightened and fixed together. . Note that the stirring body 41 is provided in contact with or close to the inner surface of the outer circumferential body portion 25 .

The support stand 3 has a square shape, has a handle 44 attached to its side wall, and is placed on the bottom plate 5 of the appliance main body 1 with its bottom wall. It is rotatably supported with. Transmission shaft 45
is inserted through the center of the side plate 19 and fixed to the side plate 19, and one end thereof is loosely fitted to the side wall of the support base 3, so that the roasting container 2 is rotatably provided. Also, the transmission shaft 4
A joint 46 that enters into the cylindrical portion 18 of the joint 15 is fixed to the other end of the joint 5, and this joint 46 is provided with four engaging protrusions 47 that engage with the engaging protrusions 17 of the joint 15 to transmit rotational force. There is. Since the roasting container 2 is supported on a cantilever by loosely fitting the transmission shaft 45 into the side wall of the support base 3, the axis of the roasting container 2, that is, the axis of the transmission shaft 45 is inclined with respect to the horizontal axis. However, the inclination is regulated by the retaining ring 48.

The retaining ring 48 has both ends attached to the bottom wall of the support stand 3, an upper part supported on the side wall of the support stand 3 via an arm 49, and attached to the outer periphery of the free end side of the roasting container 2. The inclination of the container 2 is controlled. This retaining ring 48 is connected to the joint 15 and the joint 46.
In the connected state, it is spaced apart from the roasting container 2 so as not to interfere with the rotation of the container 2.

In addition, 50 in the figure is a cut and raised piece formed on the bottom plate 5;
Reference numeral 1 denotes a locking hole drilled in the bottom wall of the support base 3, and the cut-and-raised piece 50 and the locking hole 51 are used to connect the joints 15 and 46 when the support base 3 is placed on the bottom plate 5. They engage with each other in this state to prevent the roasting container 2 from being moved inadvertently.

(Operation of the embodiment) When roasting raw coffee beans, first remove the support stand 3 from the device body 1, and then use the knob 36.
rotate the opening/closing plate 26 and the inner circumference body 30 to align the opening 34 of the opening/closing plate 26 with the entrance/exit 33,
A predetermined amount of coffee beans is stored in the roasting container 2 through this entrance/exit 33. Then, after storing, pick the knob 3 again.
6, the entrance/exit 33 is closed by the blind wall portion of the opening/closing plate 26.

After storing the coffee beans in the roasting container 2 in this way, the support stand 3 is placed on the bottom plate 5 of the main body 1 as shown in the first figure, and the joint 15 on the motor 12 side and the joint 46 on the transmission shaft 45 side are connected. Connect with.

In this state, the motor 12 and the heating element 13
When the roasting vessel 2 is energized and starts operating, the rotational force of the motor 12 is transmitted through the joints 15, 46 and the transmission shaft 45, causing the roasting vessel 2 to rotate around the heating element 13, and the stirring body 41 produces coffee. While stirring the beans, the heating element 13 heats the coffee beans with radiant heat through the inner peripheral body 30 and roasts the coffee beans. During such roasting, since a reflective film is formed on the outer peripheral surface of the outer peripheral body 25, the radiant heat from the heating element 13 is less likely to be transmitted through the outer peripheral body 25 and radiated to the outside. It is reflected by the light and has an effective effect on the roasting of coffee beans. In addition, since the inner circumferential body portion 30 is constructed of a combination of wire mesh or wire rods, the heating element 13
The radiant heat from the inner body 30 has a low reflectance, and the coffee beans can be heated efficiently. The progress of roasting the coffee beans can be confirmed through the transparent outer body 25.

After roasting, remove the support stand 3 from the main body 1 and align the skin discharge part 35 of the opening/closing plate 26 with the entrance/exit port 33 by operating the knob 36 to remove the skin etc. that came off from the coffee beans during roasting. Remove the lees. That is, by holding the handle 44 to support the support stand 3 and swinging it with the entrance/exit 33 facing downward,
The dregs such as the outer skin are dropped outward through the skin discharge part 35 and the entrance/exit 33 and are removed.

After such operations, the roasted coffee beans are taken out by operating the knob 36 again to align the opening 34 of the opening/closing plate 26 with the entrance/exit 33.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, and can of course be implemented with appropriate modifications within the scope of the gist. Moreover, it can be used not only for roasting coffee beans but also for roasting granular foods such as soybeans and peanuts.

(Effects of the present invention) As described above, according to the structure of the present invention, it is possible to easily check the progress of roasting through the transparent outer body, and the heating element is located inside the roasting container, A transparent reflective film is installed on the outer body of the roasting container to reflect the heat from the heating element inward, preventing unnecessary heat radiation to the outside and making the heat more effective for heating the food. significantly increases its thermal efficiency,
The roasting time can be shortened, there is no uneven roasting due to uneven rotation of the roasting container, and the product is also good in terms of workability.

[Brief explanation of the drawing]

Figure 1 is a front longitudinal sectional view showing the proposed roaster;
The figure is a side view of the main body of the above appliance, Figure 3 is a left side view of the assembly consisting of the roasting container and support stand, Figure 4 is a half sectional view of the right side of the assembly, and Figure 5 is the opening/closing plate as above. FIG. 2: Roasting container, 12: Motor (drive source), 1
3: heating element, 25: outer body, 30: inner body,
31: Storage chamber, 41: Stirring body.

Claims (1)

[Scope of utility model registration request] A roasting container having a transparent outer circumferential body and an air-permeable inner circumferential body and forming a food storage chamber between the two bodies, a driving source for rotating the roasting container, and The heating element is located in the inner circumferential body and heats the food to be cooked, and the heating element is in a fixed state and the roasting container is rotated around it. A roaster characterized by being equipped with a transparent reflective film that reflects heat inward.