JP2006187493A - Heating object utensil for electromagnetic induction heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating object utensil for an electromagnetic induction heating cooker facilitating the working of a magnetic metal plate and completely preventing a trouble such as detachment of the magnetic metal plate from a body. <P>SOLUTION: The magnetic metal plate 5 provided in the bottom of the body 1 formed of a nonmagnetic metal material and induction-heated by an electromagnetic induction heating cooker is provided with a plurality of projections 6 projecting to the bottom side of the body 1; and the projections 6 are embedded inside the bottom of the body 1 to integrate the body 1 with the magnetic metal plate 5. This constitution facilitates projection work for the magnetic metal plate 5 by bending or the like and integrates the body 1 with the magnetic metal plate 5 with the plurality of projections 6 embedded inside the bottom of the body 1 so as to provide a firm connecting force between the body 1 and the magnetic heating plate 5 and completely prevent the trouble such as the detachment of the magnetic metal plate from the body 1 by a stress due to a difference between coefficients of thermal expansion. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a cooking utensil for an electromagnetic induction heating cooker used in a general household kitchen or a commercial kitchen.

Conventionally, this type of cooking utensil for an electromagnetic induction heating cooker is composed of a main body made of a non-magnetic metal material and a magnetic metal material disposed on the bottom of the main body and induction-heated by an electromagnetic induction heating cooker. Yes. As an example of the configuration, there is one in which a magnetic metal plate having a through hole is inserted into a mold at the bottom of a main body made of a nonmagnetic metal material such as aluminum or an aluminum alloy and integrally molded. This prevents peeling of the magnetic metal plate from the main body due to the stress of strain generated between the nonmagnetic metal material of the main body and the magnetic metal material that is induction-heated due to the difference in thermal expansion coefficient between the two. In order to achieve this, the through holes formed in the magnetic metal plate are provided with a gradient such that the outer surface side becomes larger (see, for example, Patent Document 1).
JP-A-6-215862

  However, in the above-described conventional configuration, the gradient of the end face of the through hole alone is not sufficient as a binding force for preventing the main body and the magnetic metal plate from being peeled off, and the processing is also post-processing such as chamfering. It took time and effort.

  The present invention solves the above-mentioned conventional problems, and the electromagnetic induction heating is easy to process the magnetic metal plate and completely prevents the problem that the magnetic metal plate is detached from the main body due to the stress due to the difference in thermal expansion coefficient. An object is to provide a heated cooking utensil for a cooker.

  In order to solve the above-described conventional problems, the cooked utensil for the electromagnetic induction heating cooker according to the present invention is a magnetic metal plate that is provided at the bottom of the main body made of a nonmagnetic metal material and is induction-heated by the electromagnetic induction heating cooker. A plurality of protrusions protruding on the bottom side of the main body are provided, and these protrusions are embedded in the bottom of the main body to integrate the main body and the magnetic metal plate.

  With this configuration, the projection on the magnetic metal plate is easy by bending and the like, and the main body and the magnetic metal plate are integrated with the plurality of projections embedded in the bottom of the main body. Thus, it is possible to completely prevent the problem that the magnetic metal plate is detached from the main body due to the stress due to the difference in thermal expansion coefficient.

  The cooked utensil for an electromagnetic induction heating cooker according to the present invention can easily process the magnetic metal plate and can completely prevent a problem that the magnetic metal plate is detached from the main body due to a stress due to a difference in thermal expansion coefficient.

  1st invention is equipped with the main body which consists of a nonmagnetic metal material, and the magnetic metal plate which is provided in the bottom part of this main body, and is induction-heated with an electromagnetic induction heating cooking device, The said magnetic metal plate protrudes in the bottom part side of a main body. The protrusions are embedded in the bottom of the main body and the main body and the magnetic metal plate are integrated, so that the protrusion to the magnetic metal plate can be easily processed by bending and the like. Since the main body and the magnetic metal plate are integrated in a state where the magnetic metal plate is embedded in the bottom of the main body, a strong bonding force between the main body and the magnetic heating plate is obtained, and the magnetic metal plate is moved by the stress due to the difference in thermal expansion coefficient. It is possible to completely prevent problems such as detachment.

  In the second invention, in particular, in the first invention, the magnetic metal plate is provided with a plurality of slits for forming bent portions, and the bent portions are bent from the slits to form protrusions. Protrusion processing to a metal plate can be performed easily.

  According to a third aspect of the invention, in particular, in the second aspect of the invention, the protrusions formed by bending the bent portion are substantially opposed to each other to form a pair, and by forming a plurality of the protrusions, the protrusions by the bent portion are embedded in the main body. In addition, since the main body of the embedded portion is sandwiched and fixed inside the pair of protrusions formed, the main body and the magnetic metal plate are more firmly coupled.

  According to a fourth aspect of the invention, in particular, in the second aspect of the invention, the protrusions formed by bending the bent portion are substantially opposed to each other to form a pair, and a plurality of the protrusions are formed so that the protrusion by the bent portion is embedded in the main body. In addition, since the main body of the embedded portion is sandwiched and fixed outside the pair of protrusions formed, the main body and the magnetic metal plate are more firmly coupled as in the third invention.

  In the fifth invention, in particular, in any one of the second to fourth inventions, by making the folding angle of the bent portion an acute angle, the thickness direction of the bottom portion of the main body and the bent portion of the magnetic metal plate are constant. Since it has an angle, it becomes more difficult to come off.

  In the sixth aspect of the invention, in particular, in any one of the second to fourth aspects of the invention, the bending angle of the bent portion is made obtuse, so that the thickness direction of the bottom of the main body and the magnetic metal plate are the same as in the fifth aspect. Since a certain angle is given to the bent portion, it is further difficult to come off.

  A seventh invention comprises a main body made of a non-magnetic metal material and a magnetic metal plate provided at the bottom of the main body and induction-heated by an electromagnetic induction heating cooker, and the magnetic metal plate hooks in a direction opposite to the main body. And forming a groove in the molding die of the main body, and integrally molding the main body and the magnetic metal plate with the hook portion and the groove of the mold engaged, so that the magnetic metal can be formed at the time of casting the main body. By pushing the hook portion of the plate in alignment with the groove portion of the mold, the magnetic metal plate and the main body can be easily and reliably positioned, the magnetic metal plate is fixed at a predetermined position of the main body, and the expected performance can be exhibited.

  In the eighth invention, in particular, in the seventh invention, the hook portion of the magnetic metal plate and the nonmagnetic metal material filled in the groove portion of the mold are removed after the integral molding, so that the magnetic material which is not required at the time of completion is obtained. Since the hook portion of the metal plate is wrapped in the nonmagnetic metal material filled in the groove portion of the mold, rigidity is increased and deformation is difficult, so that removal processing can be easily performed with a lathe or the like.

  In the ninth aspect of the invention, in particular, in the seventh aspect of the invention, the groove portion that engages with the hook portion of the magnetic metal plate is made into a substantially cylindrical shape or a substantially arc shape, so that it is continuously removed when using a lathe or the like. Therefore, the workability of removal processing is further improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1-4 has shown the to-be-heated cooking tool for the electromagnetic induction heating cooking appliance in Embodiment 1 of this invention.

  In the present embodiment, the cooked utensil is not limited to a pan-shaped one, but this will be described below as a representative example.

  The pan-shaped body 1 is made of a non-magnetic metal material such as aluminum or aluminum alloy, which is heated and melted at a high temperature, in a space formed by the fixed side 2 and the moving side 3 of the casting mold. It is manufactured by pouring and cooling and then removing from the mold. Here, the fixed side and the moving side of the mold may be the reverse of this figure.

  A magnetic metal plate 5 is set at a position corresponding to the bottom of the main body 1 on the fixed side 2 of the mold before the molten nonmagnetic metal material is injected, and then cast into the nonmagnetic metal material, that is, cast. Sometimes it is inserted into the body 1 and integrated.

  A plurality of protrusions 6 are formed on the magnetic metal plate 5. The protrusion 6 is formed by bending a part of the magnetic metal plate 5, but before bending, a substantially U-shaped (or substantially arc-shaped) slit 7 is formed as shown in FIG. The projection 6 is formed by bending the bent portion 8 surrounded by the slit 7.

  Here, the slit width is not particularly limited, and the projection 6 may be formed by a so-called cutting and raising processing method in which there is almost no slit width and bending is performed almost simultaneously with the slit formation.

  FIG. 4 shows a process in which the bent portion 8 surrounded by the slit 7 becomes the protrusion 6 by bending.

  Here, the bending direction of the protrusions 6 is a direction in which the protrusions 6 are buried in the main body 1 when set in a mold and cast, and thereby a strong coupling force between the main body 1 and the magnetic heating plate 5 is obtained. As a result, the strain generated between the non-magnetic metal material that is the material of the main body 1 and the magnetic metal material that is the material of the magnetic heating plate 5 that is induction-heated is heated and cooled due to the difference in coefficient of thermal expansion. The magnetic metal plate 5 can be prevented from being peeled off from the main body 1 due to stress, and since the protrusion 6 is formed by bending, the mold for processing the magnetic metal plate 5 can be simplified. is there.

  Further, in the present embodiment, when the substantially U-shaped (or substantially arc-shaped) slit 7 is bent, the pair of protrusions 6 formed on the bent portion 8 are substantially opposed to each other inside. In addition to forming the plurality of protrusions 6 in the main body 1, the main body 1 of the embedded portion is sandwiched and fixed inside the pair of protrusions 6. Power is obtained.

  The formation of the protrusions 6 is easy and easy to bend, but is not limited to this. For example, the protrusions can be punched upward from the bottom to form a cylindrical or other protrusion.

(Embodiment 2)
5-8 shows the to-be-heated cooking tool for the electromagnetic induction heating cooking appliance in Embodiment 2 of this invention.

  As shown in the figure, when the substantially U-shaped slit 10 formed on the magnetic metal plate 9 is folded, a pair of protrusions 11 formed on the bent portion are opposed to each other on the outside. A plurality of these are formed.

  Thereby, in addition to embedding the protrusion 11 in the main body 1, the main body 1 of the embedded portion is sandwiched and fixed outside the pair of protrusions 11, so that the stronger binding force is obtained as in the first embodiment. Is obtained.

(Embodiment 3)
FIG. 9 shows a cooked utensil for an electromagnetic induction heating cooker according to Embodiment 3 of the present invention.

  As shown in the figure, the bending angle α of the protrusion 13 formed on the magnetic metal plate 12 is an acute angle.

  As a result, a certain angle is given to the thickness direction of the bottom of the main body 1 and the projection 13 formed by the bent portion of the magnetic metal plate 12, and since it is a so-called undercut, it is more resistant to peeling and the like. Is.

(Embodiment 4)
FIG. 10 shows a cooked utensil for an electromagnetic induction heating cooker according to Embodiment 4 of the present invention.

  As shown in the figure, the bending angle β of the protrusion 15 formed on the magnetic metal plate 14 is an obtuse angle.

  As a result, the thickness direction of the bottom of the main body 1 and the bent portion of the magnetic metal plate 14 are given a certain angle. As in the third embodiment, since the undercut is formed, it is more resistant to peeling and the like. Become.

(Embodiment 5)
FIGS. 11-15 shows the to-be-heated cooking tool for the electromagnetic induction heating cooking appliance in Embodiment 5 of this invention.

  As shown in the figure, the magnetic metal plate 16 is formed by bending a plurality of hook portions 17 in the central portion thereof in the direction opposite to the main body 1, and the bending angle γ is an acute angle. On the other hand, a groove portion 19 is formed on the fixed side 18 of the molding die of the main body 1. The main body 1 and the magnetic metal plate 16 are integrally formed with the hook portion 17 and the groove portion 19 of the mold engaged.

  Accordingly, the magnetic metal plate 16 and the main body 1 can be easily and reliably positioned by pushing the hook portion 17 of the magnetic metal plate 16 into the groove portion 19 of the mold when the main body 1 is cast and formed. Is fixed at a predetermined position of the main body 1, and the expected performance can be exhibited.

  More specifically, FIG. 13 shows a state in which the magnetic metal plate 16 is set in the mold, and the surface corresponding to the bottom surface of the main body 1 on the fixed side 18 of the mold is formed on the surface of the magnetic metal plate 16. A groove portion 19 is formed at a location opposite to the hook portion 17. When the position of the hook 17 of the magnetic metal plate 16 is pressed in accordance with the groove portion 19, the hook 17 is fitted while being bent, and its elasticity causes the inside of the mold. It is held at a predetermined position.

  In this state, by injecting and cooling a nonmagnetic metal material such as aluminum or aluminum alloy melted in the mold, the magnetic metal plate 16 is fixed to the bottom surface at a predetermined position of the main body 1. Therefore, it is possible to easily and surely position the main body 1 at a predetermined position, and to solve the problem that the magnetic metal plate 16 is not fixed at the predetermined position of the main body 1 and the expected performance cannot be exhibited.

  FIG. 14 shows the back surface of the main body 1 completed by casting. The nonmagnetic metal material filled in the groove portion 19 of the mold is formed as a convex portion 20 in a state where the hook 17 of the magnetic metal plate 16 is cast. It is formed. Thereafter, as shown in FIG. 15, it is common to remove unnecessary portions on the bottom surface and burrs during casting, etc. by post-processing, but the hook portion 17 of the magnetic metal plate 16 is connected to the groove portion 19 of the mold. Since the convex portion 20 is encased in the nonmagnetic metal material filled in the material, rigidity is increased and deformation becomes difficult, so that removal processing with a lathe or the like is facilitated.

(Embodiment 6)
16 and 17 show a heated cooking utensil for an electromagnetic induction heating cooker according to Embodiment 6 of the present invention.

  As shown in the figure, the groove portion 22 formed on the fixed side 21 of the mold has a substantially cylindrical shape (or a substantially arc shape), and the hook portion 17 of the magnetic metal plate 16 is fitted in the groove portion 22. Is retained.

  When casting is performed in this state, a substantially cylindrical (or substantially arc-shaped) rib 23 in which the hook portion 17 is cast is formed at the bottom of the body 1 after casting. Thereby, when it removes using a lathe etc., since it becomes continuous cutting, the workability of removal processing further improves.

  As described above, the cooked utensil for the electromagnetic induction heating cooker according to the present invention has a problem that the magnetic metal plate is easily processed and the magnetic metal plate is detached from the main body due to the stress due to the difference in thermal expansion coefficient. Since it can be completely prevented, it can be applied not only to pot-shaped cooking utensils but also to plates for pottery cooking.

Sectional drawing which shows the shaping | molding state of the to-be-heated cooking tool in Embodiment 1 of this invention. Rear view showing part of the cooked utensil Partial enlarged view of the magnetic metal plate of the heated cookware Partial expanded sectional view of the magnetic metal plate of the cooked cooking utensil Sectional drawing of the to-be-heated cooking tool in Embodiment 2 of this invention Rear view showing part of the cooked utensil Partial enlarged view of the magnetic metal plate of the heated cookware Partial expanded sectional view of the magnetic metal plate of the cooked cooking utensil Partial expanded sectional view of the to-be-heated cooking tool in Embodiment 3 of this invention Partial expanded sectional view of the to-be-heated cooking appliance in Embodiment 4 of this invention Sectional drawing which shows the magnetic metal plate of the to-be-heated cooking tool in Embodiment 5 of this invention. Top view of the magnetic metal plate of the cooked utensil Sectional drawing which shows the shaping | molding state of the to-be-heated cooking tool Rear view showing part of the cooked utensil Partial enlarged sectional view of the same cooked cooking utensil Sectional drawing which shows the shaping | molding state of the to-be-heated cooking tool in Embodiment 6 of this invention. Rear view showing part of the cooked utensil

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2, 18, 21 Mold fixed side 3 Mold moving side 5, 9, 12, 14, 16 Magnetic metal plate 6, 11, 13, 15 Protrusion 7, 10 Slit 17 Hook part 19 Groove part 20 Convex part 22 substantially cylindrical groove 23 substantially cylindrical rib

Claims (9)

A main body made of a non-magnetic metal material, and a magnetic metal plate provided at the bottom of the main body and induction-heated by an electromagnetic induction heating cooker, the magnetic metal plate having a plurality of protrusions protruding toward the bottom of the main body A heated cooking tool for an electromagnetic induction heating cooker, which is provided and embedded in the bottom of the main body to integrate the main body and the magnetic metal plate. The to-be-heated cooking tool for electromagnetic induction heating cookers of Claim 1 which provided the some slit which forms a bending part in a magnetic metal plate, and bend | folded the bending part from the slit into the protrusion. The cooking utensil for an electromagnetic induction heating cooker according to claim 2, wherein a plurality of protrusions formed by bending the bent portion are substantially opposed to each other to form a pair. The cooked utensil for an electromagnetic induction heating cooker according to claim 2, wherein a plurality of protrusions formed by bending the bent portion are substantially opposed to each other to form a pair. The to-be-heated cooking tool for electromagnetic induction heating cooking appliances of any one of Claims 2-4 which made the bending angle of the bending part an acute angle. The to-be-heated cooking tool for electromagnetic induction heating cooking appliances of any one of Claims 2-4 which made the bending angle of the bending part the obtuse angle. A main body made of a non-magnetic metal material, and a magnetic metal plate provided at the bottom of the main body and induction-heated by an electromagnetic induction heating cooker, the magnetic metal plate is provided with a hook portion in a direction opposite to the main body, A cooking utensil for an electromagnetic induction heating cooker in which a groove portion is formed in a molding die, and a main body and a magnetic metal plate are integrally formed with the hook portion and the groove portion of the die engaged. The cooked utensil for an electromagnetic induction heating cooker according to claim 7, wherein the hook portion of the magnetic metal plate and the nonmagnetic metal material filled in the groove portion of the mold are removed after integral molding. The heated cooking utensil for an electromagnetic induction heating cooker according to claim 7, wherein the groove portion engaged with the hook portion of the magnetic metal plate has a substantially cylindrical shape or a substantially arc shape.

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