JP2011038675A - Enameled top panel for heating cooker - Google Patents

Abstract

An enameled top plate for a heating cooker is provided that includes a top plate in which thermal deformation of a plane is suppressed even by firing for enamel processing.
A top plate 12 for a heating cooker that covers an upper portion of a heating cooker main body 11 and is engraved with at least two layers on a top plate dough 21 formed of a rectangular metal flat plate. Is provided. The top plate fabric 21 is formed with bent portions 23 that are bent from the top plate plane at both outer peripheral edge portions on the long side. A frame 5 is attached to the outer peripheral edge of the top plate 2. The bent portion 23 of the top plate 2 is bent downward, and a concave groove 54 for filling an elastic adhesive 56 formed inside the frame body 5 is opposed to the top plate 2 on the upper surface of the bent portion 23. The frame 5 is bonded.
[Selection] Figure 4

Description

  The present invention relates to an enamel top plate for a heating cooker that covers an upper portion of a heating cooker body.

  For example, a gas stove top plate having various colors according to the system kitchen is being demanded. Recently, a glass top plate that has been widely used has a flat feeling and a beautiful appearance, but because there is a limitation on the glass color, it is difficult to provide color variations that sufficiently meet the user's requirements. Therefore, as the top plate constituting the top plate, it has been proposed that the top plate fabric made of steel plate for enamel is made of enamel and enameled in multiple colors by forming enamels in multiple layers. ing.

JP 2008-101845 A Japanese Patent Laid-Open No. 7-42954

However, in order to enamel steel plate top plate fabric, it must be fired in a baking furnace at a high temperature of 700 ° C. to 800 ° C. or more. There was a problem that it may be distorted.
This invention is made | formed in view of the said situation, and makes it a subject to provide the enamel top plate for heating cookers provided with the top plate by which the thermal deformation of a plane is suppressed by baking for performing enamel processing. .

The enamel pan for a heating cooker according to the present invention is
It is an enamel top plate for a heating cooker that covers the upper part of the heating cooker body,
Provided with a top plate that is engraved with at least two layers on the top plate fabric formed of a rectangular metal flat plate,
The top plate fabric is formed with bent portions bent from the top plate plane at both outer peripheral edge portions on the long side.

  From the above configuration, by forming the bent portions at both outer peripheral edge ends on the long side of the top plate fabric, the rigidity of the top plate fabric can be increased while the entire surface is flat. Thereby, when baking in a baking furnace and performing a hollow process to top plate cloth, the thermal deformation of top rate cloth can be controlled effectively. Therefore, even if many layers of enamel are formed, the thermal deformation of the top plate fabric can be suppressed. Moreover, even if it heats by a heat source etc. at the time of use of a heating cooker, the thermal deformation of a top plate can be suppressed.

In the above enamel pan for heating cooker,
The bent portion of the top plate fabric is preferably bent along the eye direction of the metal crystal structure of the metal flat plate forming the top plate fabric.
As a result, the bent portion can be easily formed on both outer peripheral edge portions on the long side of the top plate dough without causing distortion on the entire surface due to bending of the press or the like. The top plate fabric with the entire surface being flat can be easily increased in rigidity by the portion.

In the above enamel pan for heating cooker,
The bent portion of the top plate fabric is preferably bent within a range of 5 to 45 degrees with respect to the top plate plane.
As a result, the top plate fabric can be effectively stiffened so that the entire surface of the top plate fabric is maintained in a flat state, and thermal deformation of the top rate fabric due to baking during enamel processing is effectively suppressed.

In the above enamel pan for heating cooker,
Provided with a frame attached to the outer peripheral edge of the top plate,
The bent portion of the top plate is bent downward, and the frame is bonded to the top plate with the upper surface of the bent portion facing the concave groove for filling the elastic adhesive formed inside the frame. Is preferred.
As a result, the bent portion at the outer peripheral edge of the top plate is disposed inside the frame and is not visible in appearance, so that the flat top surface of the enamel top plate is not impaired.

By the way, when the top plate has a flat plate shape with the outer peripheral edge extending straight as in the prior art, less elastic adhesive is required to bond the frame to the outer peripheral edge of the top plate. The elastic force is also reduced. Therefore, due to the difference in coefficient of thermal expansion between the top plate and the frame, the top plate and the frame fluctuate in different amounts due to heating during use of the heating cooker, and the elastic adhesive peels off. There was a possibility that the plate might peel off from the frame.
On the other hand, in the present invention, both outer peripheral edge portions on the long side of the top plate are bent downward, and a groove for filling an elastic adhesive is formed inside the frame on the upper surface of the bent portion. Since these are opposed to each other, a wide space for filling the elastic adhesive can be secured. Thereby, the application quantity of the elastic adhesive which adhere | attaches a top plate and a frame increases, and the elastic force by the elastic adhesive between a top plate and a frame can be increased. Therefore, even when different amounts of variation occur due to the difference in coefficient of thermal expansion between the top plate and the frame due to heating during use of the heating cooker, the top plate and the frame are not affected by the elastic deformation of the elastic adhesive. It is possible to prevent the top plate from being peeled off from the frame.

  As described above, according to the enamel top plate for a heating cooker according to the present invention, even when multiple layers of enamel are formed by baking, thermal deformation of the top plate dough is effectively avoided. An enamel top plate provided with a plate can be provided. Moreover, even if it is heated by a heating source during use of the heating cooker, it is possible to hold the flat top surface by suppressing thermal deformation of the top plate.

It is a perspective view which shows the structure of a built-in type stove. It is a top view which shows the enamel top plate by this Embodiment. It is a top view which shows the top plate which comprises the enamel top plate by this Embodiment. It is an expanded sectional view which shows the adhesion part of the top plate and frame in the enamel top plate by this Embodiment. It is an expanded sectional view which shows the assembly structure of the top plate and heat sink in the enamel top plate by this Embodiment. It is a disassembled perspective view which shows the assembly structure of the top plate and heat sink in the enamel top plate by this Embodiment. It is a top view which shows the measuring point of the distortion amount in a top plate.

  The gas stove 1 as a heating cooker shown in FIG. 1 is called a built-in stove, and the enamel top plate 12 of the present embodiment is applied. The built-in stove includes a stove body 11 that is suspended in an opening 42 so as to be dropped into a storage space 41 that opens to the counter top 4 of the system kitchen, and a counter top that covers the top of the stove body 11. And the enamel top plate 12 placed in the four opening portions 42. The stove body 11 has a peripheral wall flange mounted on a packing on the periphery of the opening 42 (not shown), and further includes a grill 13 and three burners 14 inside the stove body 11. Each burner 14 is exposed from each stove opening 15 of the enamel top plate 12, and five virtues 16 are placed on each stove opening 15.

  As shown in FIG. 2, the enamel top plate 12 is configured by arranging a top plate 2 and a rear plate 3 in a frame of a frame body 5 formed in a rectangular shape, and has a peripheral edge of an opening 42 of the countertop 4. (Not shown). The frame body 5 is made of a strip-shaped material made of an aluminum extrusion-molded product, and the strip-shaped material is folded into a rectangular shape imitating the outer shape of the enamel top plate 12 so that both ends are attached to the rear side of the enamel top plate 12. The outer frame 51 is formed, and the partition frame 52 is disposed between the top plate 2 and the rear plate 3. A concave groove 54 filled with an elastic adhesive 56 for adhering the top plate 2 is formed on the entire bottom surface of the overhanging portion 53 on the inner side of the frame body 5 (see FIG. 4). As the elastic adhesive 56, for example, silicone rubber or the like is used. A lateral groove 55 for inserting the outer peripheral edge of the rear plate 3 is formed on the inner side surface of the frame 5 over the entire circumference (see FIG. 4). The rear plate 3 is formed of an elongated rectangular aluminum plate, and an exhaust opening 31 communicating with the exhaust passage of the grill 13 is formed therethrough. An exhaust cover 32 is placed on the rear plate 3 so as to cover the exhaust opening 31 (see FIG. 1).

  As shown in FIGS. 3 and 4, the top plate 2 has a color on the surface of a top plate fabric 21 formed of a hollow steel plate (for example, SPP (decarburized steel plate for enamel)) as a rectangular metal flat plate. An enamel 24 such as a layer or a clear layer is formed in multiple layers. The top plate 2 is formed with three circular burner openings 22 penetratingly formed at corresponding positions of the respective burners 14. This top plate 2 can produce various colors by forming the enamel 24 in multiple layers, can give a pearly luster, and is more resistant to impact than a glass top plate. Can do. The enamel processing of the top plate 2 is performed by applying or adhering the enamel solution to the top plate dough 21 in which each of the above-described burner openings 22 is formed, and then firing at a high temperature of about 700 ° C. to 800 ° C. or higher in a firing furnace. Is done.

  By the way, in order to form enamels in multiple layers, if such firing is performed many times, the plane of the top plate fabric may be thermally deformed and distorted. In this embodiment, the top plate fabric 21 in which the burner opening 22 is formed has a bent portion 23 that is bent downward with respect to the top plate plane at both outer peripheral edge portions on the long side. . Specifically, the top plate fabric 21 has a plate thickness of 2.0 mm, vertical and horizontal dimensions of 409 mm × 730 mm, and both outer peripheral edge portions on the long side are bent 10 degrees downward within a range of 3.5 mm in width. The portion is a bent portion 23. Thus, the top plate fabric 21 in which the bent portions 23 are formed at both outer peripheral edge portions on the long side can increase the rigidity several times as compared with a flat top plate fabric having straight outer peripheral edge portions. As a result, the entire surface can be maintained flat.

  In addition, the top plate fabric 21 is formed so that the eye direction of the metal crystal structure of the enamel steel plate forming the top plate fabric 21 is the long side direction, and accordingly, bending at both outer peripheral edge ends on the long side side is performed. The part 23 is bent along this eye direction. Here, the above-mentioned eye direction is a rolling direction (roll eye direction) when the enamel steel plate is manufactured by rolling with a rolling roll, and an internal metal crystal structure is formed along this rolling direction. . Thereby, the bending part 23 can be easily formed with respect to both outer peripheral edge parts on the long side in the top plate fabric 21 without causing distortion on the entire surface by a bending process or the like of the press. The bent portion 23 can easily increase the rigidity of the top plate fabric 21 whose entire surface is flat.

  Accordingly, even if the top plate dough 21 is subjected to high temperature baking several times in order to carry out several layers on the top plate dough 21, thermal deformation of the plane of the top plate dough 21 can be effectively suppressed. As a result, even if the enamel 24 is formed in multiple layers, thermal deformation of the plane of the top plate fabric 21 provided with the burner openings 22 can be suppressed. Further, even when the gas stove 1 is heated by the burner 14 or the like, the thermal deformation of the top plate 2 can be suppressed. Therefore, the flatness of the top surface of the enamel top plate 12 can be maintained for a long time.

  The angle of the bent portion 23 of the top plate fabric 21 is not limited to 10 degrees as described above, and is bent within a range of 5 degrees to 45 degrees downward with respect to the top plate plane. Thereby, the rigidity of the top plate fabric 21 can be effectively increased so that the entire surface is maintained in a flat state, and thermal deformation of the top plate fabric 21 due to firing during enamel processing is effectively suppressed.

  Further, each of the bent portions 23 of the top plate 2 is opposed to a concave groove 54 for filling an elastic adhesive formed on the lower surface of the protruding portion 53 inside the frame body 5 with respect to the upper surface opposite to the bending direction. Bonded to the frame 5. As a result, the bent portions 23 before and after the top plate 2 are covered with the projecting portion 53 of the frame body 5 and are not visible in appearance, so that the appearance of the flat top surface of the enamel top plate 12 is not impaired.

  By the way, if the top plate is a flat plate whose outer peripheral edge also extends straight, the amount of elastic adhesive for adhering the frame to the outer peripheral edge of the top plate can be reduced. Becomes smaller. Therefore, due to the difference in thermal expansion coefficient between the top plate and the frame, the top plate and the frame fluctuate by different amounts due to heating when using the burner, and the elastic adhesive is peeled off. There was a risk of peeling off the frame.

  On the other hand, in the present embodiment, the outer peripheral edge of the long side of the top plate 2 is bent downward, and is formed on the lower surface of the projecting portion 53 of the frame 5 with respect to the upper surface of the bent portion 23. Since the concave grooves 54 for filling the elastic adhesive are opposed to each other, a wide space for filling the elastic adhesive 56 on both long sides of the top plate 2 can be secured. Thereby, the application amount of the elastic adhesive 56 which adhere | attaches the top plate 2 and the frame 5 increases, and the elastic force by the elastic adhesive 56 between the top plate 2 and the frame 5 can be increased. Therefore, even when different amounts of fluctuation occur between the top plate 2 and the frame body 5 due to heating when the burner is used, the fluctuation is absorbed by the elastic deformation of the elastic adhesive 56, and the top plate 2 is removed from the frame body 5. It can prevent peeling.

  In the enamel top plate 12 having the above-described configuration, the rigidity of the top plate 2 is increased by the bent portion 23, so that thermal deformation of the top plate 2 is suppressed even when the burner receiving heat from the burner 14 or the like is used. However, in order to more reliably prevent thermal deformation of the top plate 2 when the burner is used, the following configuration is further provided.

  Specifically, referring to FIG. 5 and FIG. 6, in the enamel top plate 12, the heat radiating plate 6 for releasing the heat received by the top plate 2 is substantially in close contact with the lower surface of the top plate 2 or has almost no gap. It is attached in a close state without emptying. The heat radiating plate 6 is made of a metal having good thermal conductivity such as an aluminum alloy, has a size including the three burner openings 22 of the top plate 2, and has three attachment holes 61 corresponding to the respective burner openings 22. The outer diameter is smaller than that of the top plate 2, but the thickness is 5.0 mm, which is larger than the thickness of the top plate 2 of 2.0 mm. Is formed. The heat radiating plate 6 includes a burner cover 71 disposed via a seal ring 73 a for each burner opening 22 on the upper surface of the top plate 2, and a seal ring 73 b for each mounting hole 61 on the lower surface of the heat radiating plate 6. By attaching the mounting plate 72 disposed via the screws 74 with screws 74, the mounting plate 72 is attached to the lower surface of the top plate 2. The burner cover 71 and the mounting plate 72 are made of metal, and the seal rings 73a and 73b are formed of a heat resistant material such as silicon.

  As a result, when the temperature of the top plate 2 rises when the burner is used, the heat of the top plate 2 is transmitted to the heat radiating plate 6 and released, so that the top plate 2 is prevented from being overheated and the top plate is caused by overheating. 2 deformation is suppressed. Further, the heat radiating plate 6 is mounted between the mounting hole 61 and the burner opening 22 of the top plate 2 by the burner cover 71 and the mounting plate 72, and the total weight of the heat radiating plate 6 is supported only by the top plate 2. . As a result, the heat radiating plate 6 functions as a weight that applies a downward pulling force to the area around the burner 14 in the top plate 2, and this weight action causes the area around the burner 14 in the top plate 2 to move upward. It is possible to effectively avoid thermal deformation so as to swell. Further, since the heat radiating plate 6 is formed of a single plate having a size including all the burner openings 22 of the top plate 2 and is fixed to each burner opening 22, a plurality of burners of the top plate 2 are provided. The region including 14 is reinforced by the heat sink 6. Therefore, even if the vicinity of each burner 14 of the top plate 2 is individually heated for each burner 14, it is possible to prevent the top plate 2 from being thermally deformed locally.

(Example)
As shown in FIG. 7, the amount of strain when the enamel 24 is formed in two layers using the rectangular top plate fabric 21 in which bent portions 23 a and 23 b are formed at both outer peripheral edge portions on the long side is shown. It was measured.
The top plate dough 21 is made of a decarburized steel plate (SPP) for enamel having a rectangular shape with a plate thickness of 2.0 mm and a vertical and horizontal dimension of 409 mm × 730 mm and the eye direction (rolling direction) formed in the long side direction. The top plate fabric 21 is formed with three burner openings 22a, 22b, 22c. The two left and right burner openings 22a, 22b on the front side are substantially circular holes of Φ97 mm, and each center has a center. The points are arranged at positions of 142 mm from the front long side end and 200 mm from the short side end close to each of the burner openings 22a and 22b, and one rear burner opening 22c has a diameter of 85 mm. It is a substantially circular hole, and its center point is arranged at a position on the center line of 317 mm from the long side end on the front side and 365 mm from the short side end. Each of the front and rear bent portions 23a and 23b is bent by 10 degrees at the outer peripheral edge portion in the range of a width of 3.5 mm downward over the entire length by pressing.
As for the amount of distortion, when the first enamel 24 is formed on the top plate fabric 21 and the top plate fabric 21 before enamel processing at the four measurement points 1 to 4 shown in FIG. Three measurements were taken when formed. The amount of strain was measured for five samples of the top plate fabric 21.

(Comparative example)
On the other hand, as a comparative example, the top plate fabric of this comparative example is the same as the above example except that the bent portion 23 is not formed in the top plate fabric and the end portion of the outer peripheral edge is a straight plate. The amount of strain was measured for five samples.
Tables 1 and 2 show the measurement results of the strain amount in the above Examples and Comparative Examples, respectively.

Referring to Tables 1 and 2, when the difference between the maximum value and the minimum value in the strain amount when the second layer enamel is formed, the comparative example is thermally deformed by at least 4.4 mm. (Comparative Sample 2), the maximum was 6.4 mm, which was a large thermal deformation (Comparative Sample 5). On the other hand, in the example, only 4.3 mm at maximum was thermally deformed (sample 1 of the example), and from the minimum distortion of the comparative example (sample 2 of the comparative example: difference value 4.4 mm) The thermal deformation was suppressed. In particular, in Sample 3 of the example, the difference value between the maximum value and the minimum value of the strain amount when the second layer enamel was formed was 0.8 mm, and thermal deformation was almost suppressed.
As is clear from the above results, by forming the bent portions 23a and 23b in the top plate fabric 21, the rigidity of the top plate fabric 21 is increased, and it is good even when two-layer enamel processing is performed by firing. It was found that thermal deformation was suppressed. As a result, it is possible to obtain the enamel top plate 12 including the top plate 2 whose entire surface is flat.

The bending direction of the bending portion 23 formed on the top plate fabric 21 is not limited to the lower side, and may be bent upward. Also in this case, it is preferable to bend in the range of 5 to 45 degrees in order to effectively suppress thermal distortion.
Moreover, the enamel top plate 12 according to the present invention is not limited to the above-described drop-in type stove, but can be similarly applied to the enamel top plate 12 for a desktop stove, and for the gas stove 1 provided with the burner 14. Not limited to this, it can be applied as an enamel top plate 12 for various heating cookers such as an electric heater stove and an IH stove.

1 gas stove (heating cooker)
2 Top plate 5 Frame 11 Stove body 12 Enamel top plate 21 Top plate fabric 23 Bending part 24 Enamel 53 Overhanging part 54 Groove 56 Elastic adhesive

Claims (4)

It is an enamel top plate for a heating cooker that covers the upper part of the heating cooker body,
It has a top plate that is engraved with at least two layers on a top plate fabric formed of a rectangular metal flat plate,
The top plate dough is an enameled top plate for a heating cooker in which bent portions formed by bending from the top plate plane are formed at both outer peripheral edge portions on the long side. In the enamel pan for a heating cooker according to claim 1,
The said bending part of top plate dough is the enamel top plate for heating cookers currently bent along the eye direction of the metal crystal structure of the metal flat plate which forms top plate dough. In the enamel pan for a heating cooker according to claim 1 or 2,
The bent portion of the top plate dough is an enameled top plate for a heating cooker that is bent within a range of 5 to 45 degrees with respect to the top plate plane. In the enamel pan for heating cookers in any one of Claims 1 thru | or 3,
Provided with a frame attached to the outer peripheral edge of the top plate,
Heating in which the bent portion of the top plate is bent downward, and the upper surface of the bent portion is opposed to the groove for filling the elastic adhesive formed on the inner side of the frame so that the frame is bonded to the top plate. Enamel top plate for cooker.