JP2012127521A - Duct device and heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a duct device and a heating cooker capable of securing tight sealing performance by a simple constitution, and easily being assembled with reduced wobbling.SOLUTION: In the duct device, a duct frame structure is held by making a locking means 30 provided on an overlapping portion of first and second plates lock the first and second plates to each other when a predetermined portion of the first plate 21 and a predetermined portion 22 of the second plate constituting the duct overlap each other. The locking means is composed of a hemispherical projecting part 31 projecting in the direction of the counter plate opposite to one of the first and second plates, and a hemispherical recessed part 32 which is recessed to receive the projecting part at a position corresponding to the projecting part in the counter plate, and engaged with the projecting part.

Description

  The present invention relates to a duct device that is suitably used, for example, as an exhaust drum of a roaster grill incorporated in a heating cooker, and a heating cooker using the duct device.

In a heating cooker such as an electromagnetic cooker, in which a grill is incorporated, a duct is attached to exhaust smoke generated in the grill. The duct is made of a metal material so that high-temperature hot air can pass through it, and is usually composed of two parts. In order to realize a smooth flow of air, it is important to ensure the sealing property of the duct. If the airtightness is low, smoke leaks, or conversely, air enters the duct and the pressure loss of the exhaust increases. Also, it is necessary to have a fitting structure that eliminates rattling as much as possible in order to prevent chattering noise of two parts due to vibrations of fans and induction heating devices by peripheral devices. Conventionally, a structure in which two parts of a plate material are welded or a structure in which a cut and raised engagement body and a hole processed in the plate material are fitted is employed.
In addition, as a two-part fitting structure, in the shield case mounted on the board, an engagement projection is formed on the shield base, and an engagement hole is formed in the shield cover to prevent backlash. There is something which is made to do (for example, refer to patent documents 1).

JP 2007-299814 A (pages 6-9, FIG. 7)

  In the prior art as described above, the duct having a structure in which two parts are welded has a structure with high sealing performance and no backlash, but there is a problem that a processing step of welding is necessary and the cost is increased. Further, in the structure in which the two parts are fitted with the engagement body cut and raised from the plate material by the hole, the presence of the hole in the fitting portion has a problem that the sealing performance is low and the backlash is large and noise is easily generated. . Moreover, although the technique like patent document 1 is effective for highly accurate positioning, it is difficult to improve a sealing property on the objective effect.

  The present invention has been made in order to solve the above-described problems of the prior art, and provides a duct device and a heating cooker that can be easily assembled with a simple structure and having a tight seal and little play. The purpose is to do.

In the duct device according to the present invention, when the predetermined portion of the first plate member and the predetermined portion of the second plate member constituting the duct are overlapped with each other, the locking means provided in the overlapping portion includes the first and A duct device configured to hold the frame structure of the duct by locking the second plate members to each other, wherein the locking means is connected to the opposing counterpart in one of the first and second plate materials. A hemispherical projection projecting in the direction of the plate material, and a hemispherical projection that is recessed so as to receive the projection at a position corresponding to the projection on the mating plate material and engages the projection It is characterized by comprising a recess.
The cooking device according to the present invention is characterized by using the duct device as an exhaust duct of a roaster grill having a heating device.

According to the duct device of the present invention, since the hemispherical convex portions and the hemispherical concave portions that engage with each other are used as the locking means between the superposed plate materials, It is not necessary to provide a hole in the stop portion and the sealing performance is improved. Further, since the positioning is fixed between the inclined surfaces of the hemispherical unevenness, the play can be reduced, the structure is simple, and the assembly can be facilitated.
In addition, according to the heating cooker of the present invention, the airtightness of the duct device is improved, the air flow becomes smooth, and the intrusion of smoke into the housing can be prevented, so that deterioration and contamination of the equipment can be suppressed. . In addition, chatter noise caused by vibration of peripheral devices can be prevented.

The perspective view which shows the roaster grill for the assembly to the heating cooker using the duct apparatus which concerns on Embodiment 1 of this invention. The perspective view which shows the heating cooker in which the roaster grill shown in FIG. 1 was integrated. The disassembled perspective view which shows the duct apparatus shown by FIG. The perspective view which shows the assembly state of the duct apparatus of FIG. It is an expanded sectional view which shows the latching means of the duct apparatus shown in FIG. 4, and its vicinity, and is equivalent to the arrow sectional view in the VV line | wire of FIG. The expanded sectional view which shows the latching means of the duct apparatus which concerns on Embodiment 2 of this invention, and its vicinity.

Embodiment 1 FIG.
1 is a perspective view showing a roaster grill for incorporation into a heating cooker using a duct device according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view showing the heating cooker in which the roaster grill of FIG. 1 is incorporated. FIG. In the figure, an induction heating type heating cooker 1 is provided with a box-shaped main body 2 having an upper opening and a frame material 4 around the upper portion, and is detachably mounted covering the upper opening of the main body 2. The top plate (top plate) 3 is provided. On the top plate 3, a plurality of placing portions 5a, 5b, 5c for placing a cooking pan or the like, thermal power display portions 6a, 6b, 6c, liquid crystal display portions 7a, 7b, 7c, an upper surface operation portion 9a, etc. Is provided. In addition, an intake port 8a and an exhaust port 8b are provided on the back side of the top plate 3, respectively.

  In the main body 2, a heating unit including a left electromagnetic induction heating coil, a right electromagnetic induction heating coil, and a central heater (for example, a radiant heater) corresponding to the placement units 5a to 5c is installed. A control unit that controls the unit, a heating unit, a cooling fan that cools the control unit, and the like are provided. Further, a front operation part 9b having a power switch or the like is provided on the front side of the main body part 2, and a roaster grill 10 is provided on the front side of the main body part 2 adjacent to the front operation part 9b. The roaster grill is also referred to as a grill roaster or a grill, but here it is referred to as a roaster grill.

  A duct device 20 for exhausting smoke is fixed to the rear surface portion of the roaster grill 10 as shown in FIG. The duct device 20 has a shape in which an exhaust passage having a square channel cross section is bent in an “L” shape, and is generally pressed from a thin metal plate as shown in an exploded perspective view of FIG. The duct cover 21 is a first plate material formed by processing, and the duct case 22 is a second plate material. The duct case 22 is formed in a “U” shape in cross section so as to constitute three wall surfaces of the exhaust passage having a square cross section. The outer dimension A (shown in FIG. 3) of the open end is an extended side extended to both sides of the main surface 21a of the duct cover 21 formed so as to block the remaining one of the exhaust passage having a square cross section. It is formed to be smaller by the same dimension as the inner dimension B of the part 21b or by adding a machining error.

  The duct device 20 is assembled into an external appearance as shown in the perspective view of FIG. 4 by combining the duct cover 21 in the direction of the broken arrow in FIG. At this time, the overlapping portion 22a on the outer surface near the opening end of the duct case 22 and the extending side portion 21b of the duct cover 21 are overlapped, and the overlapping portion is a duct as shown in the enlarged sectional view of FIG. Locking means 30 for positioning and fixing the cover 21 and the duct case 22 to each other is provided.

  As shown in FIG. 5, the locking means 30, which is a typical characteristic part of the present invention, is a hemispherical shape protruding in the direction of the extending side portion 21 b of the opposing duct cover 21 in the duct case 22. Constructed by a convex part 31 and a hemispherical concave part 32 which is recessed so as to receive the convex part 31 at a position corresponding to the convex part 31 in the extended side part 21 b and engages with the convex part 31. Yes. In the first embodiment, the radius of the inner peripheral surface of the convex portion 31 and the radius of the inner peripheral surface of the concave portion 32 are formed substantially the same. In addition, the arrow W of FIG. 5 is the width | variety of the superposition | polymerization part when the predetermined part of the duct cover 21 which is a 1st board | plate material which comprises a duct, and the predetermined part of the duct case 22 which is a 2nd board | plate material are mutually superposed | polymerized. In this example, it is formed in a dimension equal to the length of the extended side portion 21b.

  Further, as shown in FIG. 5, the extended end portion 21 c of the extended side portion 21 b is inclined outward, and when the duct cover 21 is united with the duct case 22, the extended end portion 21 c is spread to both outer sides. The extended side portion 21b is elastically deformed while passing through the convex portion 31 while the extended end portion 21c smoothly slides on the surface of the convex portion 31. It is configured to easily spread outward once.

  Next, the operation of the first embodiment configured as described above will be described. As shown in the enlarged cross-sectional view of FIG. 5 when the hemispherical convex portion 31 and the concave portion 32 constituting the locking means 30 are overlapped with each other because the radii of the inner peripheral surfaces thereof are the same. Further, the base peripheral surface of the concave portion 32 rides on the base peripheral surface of the convex portion 31 and is locked by a circular contact portion passing through the points C and D in FIG. At this time, a force is generated in the two parts in the directions of arrows C1 and D1 having different directions, thereby realizing a structure free from backlash. Further, since the locking means 30 constituted by the hemispherical convex portion 31 and the concave portion 32 does not have a hole communicating with the outside air, the exhaust gas does not leak from the locking means 30.

  As described above, according to the duct device of the first embodiment, the hemispherical convex portion 31 and the hemispherical concave portion 32 that engage with the convex portion 31 are used as the locking means 30 between the stacked plates. By using this, it is not necessary to provide a hole in the locking portion of the plate material, and the sealing performance is improved. In addition, because the hemispherical concave and convex inclined surfaces can be positioned and fixed, the duct cover 21 and the duct case 22 can work together to reduce backlash, and the structure is simple and easy to assemble. An effect is obtained. In addition, the environmental load in the production process can be reduced.

  Further, according to the heating cooker of the present invention, the airtightness of the duct device 20 is improved so that the air flow becomes smooth and it is possible to prevent smoke from entering the casing, so that the equipment is deteriorated or dirty. Can be suppressed. In addition, chatter noise caused by vibration of peripheral devices can be prevented.

  The radius of the inner peripheral surface of the convex portion 31 and the radius of the inner peripheral surface of the concave portion 32 do not necessarily have to be the same. For example, the radius of the outer peripheral surface of the convex portion 31 and the radius of the inner peripheral surface of the concave portion 32 In short, it is only necessary that the duct cover 21 and the duct case 22 are engaged with each other at the overlapping portion. Further, in this example, the locking means 30 are provided at a total of six locations, three on each side, but the number of the locking means 30 is not particularly limited. Further, the installation positions of the concave portion 32 and the convex portion 31 may be reversed.

Embodiment 2. FIG.
FIG. 6 is an enlarged cross-sectional view showing the locking means and its vicinity of the duct device according to Embodiment 2 of the present invention. The second embodiment is the same as the first embodiment except that the configuration of the overlapping portion between the first and second plate members and the locking means provided in the overlapping portion are changed. The same or corresponding parts are denoted by the same reference numerals. In the figure, the front end portion (upper end portion in the figure) of the overlapping portion 22a of the duct case 22 that is the second plate material is brought into contact with the back surface 21d of the main surface 21a of the duct cover 21 that is the first plate material at the point E. ing. And the convex part 31 and the recessed part 32 which comprise the latching means 30 are contact | abutting by F point.

In the second embodiment configured as described above, when the duct cover 21 and the duct case 22 are fitted as shown in FIG. By causing the tip of the overlapping portion 22a to contact the back surface 21d of the main surface 21a of the duct cover 21 at the point E, forces are generated in the two parts in directions different from each other with arrows E1 and F1, thereby preventing backlash. Generation of chatter noise is prevented. Further, since the duct cover 21 and the duct case 22 are in contact with each other at the point E, the gap is reduced and the sealing performance is improved.
As described above, according to the second embodiment, there is an effect that it is possible to realize a structure with no backlash and high sealing performance.

  In the above embodiment, the duct device 20 has been described with respect to the case where the flow path is formed in an L shape. However, it is needless to say that the duct device 20 is not limited to this. Needless to say, the present invention can be applied to various shapes. Moreover, although the heating cooker illustrated about what utilized induction heating, it is applicable also to what uses other heat sources, such as what uses gas, kerosene, or a microwave.

  DESCRIPTION OF SYMBOLS 1 Heat cooker, 2 Main-body part, 3 Top plate (top plate), 8a Intake port, 8b Exhaust port, 10 Roaster grill, 20 Duct apparatus, 21 Duct cover (1st board | plate material), 21a Main surface, 21b Extension Side part, 21c extending end part, 21d back surface, 22 duct case (second plate member), 22a overlapping part, 30 locking means, 31 convex part, 32 concave part.

Claims (4)

  When the predetermined portion of the first plate member and the predetermined portion of the second plate member constituting the duct are overlapped with each other, the locking means provided in the overlapping portion locks the first and second plate members. A duct device configured to hold the frame structure of the duct by performing the locking means in a hemisphere protruding in the direction of the opposing mating plate member in one of the first and second plate members. And a hemispherical concave portion that is recessed so as to receive the convex portion at a position corresponding to the convex portion on the mating plate material and engages with the convex portion. Duct device to do.   The duct device according to claim 1, wherein the radius of the inner peripheral surface of the convex portion and the radius of the inner peripheral surface of the concave portion are the same.   The overlapping portion of the first plate material is formed by an extended side portion bent at a boundary portion with the overlapping portion with respect to a main surface continuous to the overlapping portion, and the overlapping portion of the second plate material Is disposed on the main surface of the first plate member and an inner corner of the extended side portion, and the tip is in contact with the back surface of the main surface of the first plate member. The duct apparatus according to claim 1 or 2.   A heating cooker using the duct device according to any one of claims 1 to 3 as an exhaust duct of a roaster grill having a heating device.

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