JP6789638B2 - Induction heating coil - Google Patents

Induction heating coil Download PDF

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JP6789638B2
JP6789638B2 JP2016026708A JP2016026708A JP6789638B2 JP 6789638 B2 JP6789638 B2 JP 6789638B2 JP 2016026708 A JP2016026708 A JP 2016026708A JP 2016026708 A JP2016026708 A JP 2016026708A JP 6789638 B2 JP6789638 B2 JP 6789638B2
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plate
shaped member
conductor
induction heating
heating coil
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JP2017147065A5 (en
JP2017147065A (en
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田中　祐二
祐二 田中
貴文 林
貴文 林
和夫 北森
和夫 北森
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G.M ENGINEERING SUPPLIES INC.
Aisin Corp
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G.M ENGINEERING SUPPLIES INC.
Aisin Seiki Co Ltd
Aisin Corp
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Priority to JP2016026708A priority Critical patent/JP6789638B2/en
Priority to PCT/JP2017/003694 priority patent/WO2017141713A1/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/44—Coil arrangements having more than one coil or coil segment

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Description

本発明は、熱処理を行う板状部材を加熱する誘導加熱コイルに関する。 The present invention relates to an induction heating coil that heats a plate-shaped member to be heat-treated.

金属板等の板状部材は、誘導加熱コイルにより加熱して加工や表面処理を行うことがある。誘導加熱コイルの内部に配置された板状部材は、誘導加熱コイルに生じる磁場によって発生する誘導電流によって加熱される。板状部材においては誘導加熱コイルとの距離が近い部位ほど磁束の影響を受け易く誘導電流が高くなる。そのため、誘導加熱コイルとの距離が短い部位と長い部位とが混在する板状部材に対しては均一な加熱を行うことができない。 A plate-shaped member such as a metal plate may be processed or surface-treated by heating it with an induction heating coil. The plate-shaped member arranged inside the induction heating coil is heated by an induced current generated by a magnetic field generated in the induction heating coil. In the plate-shaped member, the closer the distance to the induction heating coil is, the more easily it is affected by the magnetic flux and the higher the induction current. Therefore, uniform heating cannot be performed on a plate-shaped member in which a portion having a short distance from the induction heating coil and a portion having a long distance from the induction heating coil coexist.

そこで、特許文献１に記載の誘導加熱装置では、金属板を誘導加熱するコイルとして１次コイルと、１次コイルと金属板との間に配置される２次コイルとを備えている。２次コイルは１次コイルの磁場により誘導電流が発生する。これにより、金属板は１次コイルに加えて２次コイルでも加熱されるようになり、金属板において面方向の温度差が軽減されるため、金属板に対して均一な加熱を行うことができる。 Therefore, the induction heating device described in Patent Document 1 includes a primary coil and a secondary coil arranged between the primary coil and the metal plate as coils for inductively heating the metal plate. In the secondary coil, an induced current is generated by the magnetic field of the primary coil. As a result, the metal plate is heated not only by the primary coil but also by the secondary coil, and the temperature difference in the surface direction of the metal plate is reduced, so that the metal plate can be uniformly heated. ..

特開２００７−１２２９２４号公報JP-A-2007-122924

特許文献１の技術では、２次コイルの誘導電流は１次コイルの磁場によって発生する電流であるため、１次コイルを流れる電流よりも小さい。このため、金属板に対して２次コリルの加熱効率を高めるには、２次コイルと金属板とを近づけて配置することが好ましい。しかしながら、金属板は通常クランプ等によって保持されるため、２次コイルに対して金属板を近距離の適正位置に保持ことは容易ではない。
また、板厚の薄い金属板の場合には、誘導加熱された金属板が反って歪むことがある。 In the technique of Patent Document 1, the induced current of the secondary coil is a current generated by the magnetic field of the primary coil, and is therefore smaller than the current flowing through the primary coil. Therefore, in order to increase the heating efficiency of the secondary choryl with respect to the metal plate, it is preferable to arrange the secondary coil and the metal plate close to each other. However, since the metal plate is usually held by a clamp or the like, it is not easy to hold the metal plate at an appropriate position at a short distance from the secondary coil.
Further, in the case of a thin metal plate, the induction-heated metal plate may warp and be distorted.

上記実情に鑑み、板状部材の熱処理に際し、歪みを抑制しつつ均一な加熱が行える誘導加熱コイルが望まれている。 In view of the above circumstances, an induction heating coil that can perform uniform heating while suppressing distortion during heat treatment of a plate-shaped member is desired.

本発明に係る誘導加熱コイルの特徴構成は、板状部材の熱処理を行うための誘導加熱コイルであって、前記板状部材を収容するための空間を内部に有し、通電により磁場を発生するコイルである第１導体と、前記空間内に全体が配置され、前記第１導体への通電により生じる１次磁場により誘導電流が流れる平板状の第２導体と、前記空間内において前記第２導体の一方の面に設けられた、絶縁性を有する複数の間隔保持部材と、を備え、前記板状部材の全体は、前記空間内において、複数の前記間隔保持部材を介して前記第２導体に支持され、前記板状部材は、前記１次磁場により誘導加熱されると共に、前記１次磁場により前記第２導体に生じた前記誘導電流から発生する２次磁場により誘導加熱される点にある。 The characteristic configuration of the induction heating coil according to the present invention is an induction heating coil for heat-treating a plate-shaped member, which has a space inside for accommodating the plate-shaped member and generates a magnetic field by energization. a first conductor is a coil, the whole in the space is disposed, a planar second conductor induced current by the primary magnetic field more occurs energization of the first conductor flows, the second in the space A plurality of insulating spacing members provided on one surface of the conductor are provided, and the entire plate-shaped member is formed in the space via the plurality of spacing members. The plate-shaped member is induced and heated by the primary magnetic field and is also induced and heated by the secondary magnetic field generated from the induced current generated in the second conductor by the primary magnetic field. ..

第１導体と板状部材との間に第２導体が配置されることで、板状部材は第１導体に加えて第２導体によっても誘導加熱されて加熱量が増加する。ここで、第１導体のみで板状部材を加熱する場合には、板状部材と第１導体の各部との距離にばらつきが存在するため、板状部材の部位によって加熱状態が異なる。これに対して、第２導体を加えることで、板状部材に対する第１導体の影響が緩和されるため、板状部材に対して均一な加熱が可能になる。
第２導体には少なくとも何れか一方の面に絶縁性の間隔保持部材を有し、この間隔保持部材を介して板状部材が第２導体に当接して支持される。これにより、板状部材に対し第２導体を適正な間隔で配置することができるので、第２導体による板状部材の加熱効率を高めることができる。さらに、板状部材が第２導体によって支持されることで、板状部材の歪みの発生を抑制することができる。 By arranging the second conductor between the first conductor and the plate-shaped member, the plate-shaped member is induced and heated by the second conductor in addition to the first conductor, and the heating amount is increased. Here, when the plate-shaped member is heated only by the first conductor, the heating state differs depending on the portion of the plate-shaped member because the distance between the plate-shaped member and each part of the first conductor varies. On the other hand, by adding the second conductor, the influence of the first conductor on the plate-shaped member is alleviated, so that the plate-shaped member can be uniformly heated.
The second conductor has an insulating spacing member on at least one of the surfaces, and the plate-shaped member is in contact with and supported by the second conductor via the spacing member. As a result, the second conductors can be arranged at appropriate intervals with respect to the plate-shaped member, so that the heating efficiency of the plate-shaped member by the second conductor can be improved. Further, since the plate-shaped member is supported by the second conductor, it is possible to suppress the occurrence of distortion of the plate-shaped member.

本発明に係る誘導加熱コイルの他の特徴構成は、複数の前記間隔保持部材の夫々が、球体である点にある。 Other characteristic feature of the induction heating coil according to the present invention, each of the plurality of spacing members is, lies in a sphere.

板状部材は、絶縁性の間隔保持部材を介して第２導体に支持された状態で誘導加熱される。このとき、加熱された板状部材から間隔保持部材に熱伝導が起こり、板状部材の加熱効率が低下することがある。そこで、本構成では、複数の間隔保持部材の夫々が球体である。これにより、板状部材と間隔保持部材との接触面積が少なくなり両者間の熱伝導が抑制される。その結果、誘導加熱コイルによる加熱効率の低下を抑制することができ、板状部材に対する均一な加熱状態を維持することができる。 The plate-shaped member is induced and heated while being supported by the second conductor via an insulating spacing member. At this time, heat conduction may occur from the heated plate-shaped member to the space-holding member, and the heating efficiency of the plate-shaped member may decrease. Therefore, in this configuration, each of the plurality of spacing members are spherical. As a result, the contact area between the plate-shaped member and the space-holding member is reduced, and heat conduction between the two is suppressed. As a result, it is possible to suppress a decrease in heating efficiency due to the induction heating coil, and it is possible to maintain a uniform heating state for the plate-shaped member.

本発明に係る誘導加熱コイルの他の特徴構成は、前記第２導体が２つあって、前記板状部材の両面に夫々対向して配置されており、複数の前記間隔保持部材は、２つの前記第２導体の夫々における前記板状部材に対向する側に設けられている点にある。 Another characteristic configuration of the induction heating coil according to the present invention is that there are two second conductors, which are arranged so as to face each other on both sides of the plate-shaped member, and the plurality of spacing members are two. The point is that each of the second conductors is provided on the side facing the plate-shaped member .

板状部材の両面に対して第２導体による誘導加熱を行うことでき、板状部材の両面において均一な加熱が可能になる。また、板状部材の両面に当接する第２導体によって板状部材が挟持されるため、板状部材１の反りをより少なくすることができる。 Induction heating can be performed on both sides of the plate-shaped member by the second conductor, and uniform heating can be performed on both sides of the plate-shaped member. Further, since the plate-shaped member is sandwiched by the second conductors that come into contact with both sides of the plate-shaped member, the warp of the plate-shaped member 1 can be further reduced.

本発明に係る誘導加熱コイルの他の特徴構成は、前記第１導体が、前記板状部材の平面方向に沿って伸縮変形可能である点にある。 Another characteristic configuration of the induction heating coil according to the present invention is that the first conductor can be expanded and contracted and deformed along the plane direction of the plate-shaped member.

本構成の如く、第１導体が板状部材の平面方向に沿って伸縮変形可能であると、例えば第１導体が収縮状態のときは、第１導体の間隔が狭くなるため板状部材が全体的に加熱され、第１導体が伸長状態のときは、第１導体の間隔が広くなるため板状部材は部位によって加熱温度に高低が生じ易くなる。このように、第１導体が伸縮変形することで、板状部材に対する加熱温度分布を容易に制御することができ、板状部材をより均一に加熱することができる。
本発明に係る誘導加熱コイルの他の特徴構成は、前記第２導体の前記面に垂直な方向を回転軸芯として前記第２導体を回転させる回転装置を更に備える点にある。 If the first conductor can be expanded and contracted along the plane direction of the plate-shaped member as in this configuration, for example, when the first conductor is in a contracted state, the distance between the first conductors becomes narrower, so that the plate-shaped member as a whole becomes When the first conductor is in an elongated state, the distance between the first conductors is widened, so that the heating temperature of the plate-shaped member tends to be high or low depending on the portion. By expanding and contracting the first conductor in this way, the heating temperature distribution with respect to the plate-shaped member can be easily controlled, and the plate-shaped member can be heated more uniformly.
Another characteristic configuration of the induction heating coil according to the present invention is that it further includes a rotating device that rotates the second conductor with the direction perpendicular to the surface of the second conductor as the rotation axis.

第１実施形態の斜視図である。It is a perspective view of 1st Embodiment. 第１実施形態の側断面図である。It is a side sectional view of 1st Embodiment. 第１実施形態の平面図である。It is a top view of the 1st Embodiment. 第２実施形態の側断面図である。It is a side sectional view of the 2nd Embodiment. 収縮状態の第１導体を示す図である。It is a figure which shows the 1st conductor in a contracted state. 伸長状態の第１導体を示す図である。It is a figure which shows the 1st conductor in the extended state. 間隔保持部材の変形例である。This is a modified example of the interval holding member. 間隔保持部材の変形例である。This is a modified example of the interval holding member. 間隔保持部材の変形例である。This is a modified example of the interval holding member. 他の実施形態の斜視図である。It is a perspective view of another embodiment. 他の実施形態を示す図である。It is a figure which shows the other embodiment.

以下に本発明に係る実施形態について図面を参照しながら説明する。 Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

〔第１実施形態〕
図１〜図３に示すように、誘導加熱コイル１０は、板状部材１を加熱する際に用いられ、第１導体１１と第２導体１２とを備える。第１導体１１は、加熱対象の板状部材１を収容可能な空間を有するコイルであり、誘導加熱電源（不図示）に接続されている。第２導体１２は、平板状に形成されており、例えば銅板によって構成されている。 [First Embodiment]
As shown in FIGS. 1 to 3, the induction heating coil 10 is used when heating the plate-shaped member 1, and includes a first conductor 11 and a second conductor 12. The first conductor 11 is a coil having a space capable of accommodating the plate-shaped member 1 to be heated, and is connected to an induction heating power source (not shown). The second conductor 12 is formed in a flat plate shape, and is made of, for example, a copper plate.

第１導体１１の内部には板状部材１が配置され、第１導体１１と板状部材１との間に第２導体１２が配置される。第２導体１２と板状部材１とは、第１導体１１の内部に順に配置されるか、事前に重ねられた状態で第１導体１１の内部に配置される。 A plate-shaped member 1 is arranged inside the first conductor 11, and a second conductor 12 is arranged between the first conductor 11 and the plate-shaped member 1. The second conductor 12 and the plate-shaped member 1 are arranged in order inside the first conductor 11, or are arranged inside the first conductor 11 in a state of being overlapped in advance.

誘導加熱電源から第１導体１１に電流が流れると、第１導体１１に１次磁場が生じる。
この１次磁場によって板状部材１に誘導電流が流れ、板状部材１が加熱される。このとき、第２導体１２にも１次磁場による誘導電流が流れ、これに伴って第２導体１２に発生した２次磁場により板状部材１が誘導加熱される。 When a current flows from the induction heating power source to the first conductor 11, a primary magnetic field is generated in the first conductor 11.
An induced current flows through the plate-shaped member 1 by this primary magnetic field, and the plate-shaped member 1 is heated. At this time, an induced current due to the primary magnetic field also flows through the second conductor 12, and the plate-shaped member 1 is induced and heated by the secondary magnetic field generated in the second conductor 12 accordingly.

このように、第１導体１１に加えて第２導体１２によって板状部材１が誘導加熱されることで、板状部材１において誘導電流の局部的な偏りが是正されて、板状部材１に対する均一な加熱が可能になる。第２導体１２は、水冷式であり大電力を用いた加熱処理が可能である。なお、第２導体１２の冷却は、冷却効率の面から水冷式が好ましいが、水冷式以外の冷却方式を採用しても良い。 In this way, the plate-shaped member 1 is induced and heated by the second conductor 12 in addition to the first conductor 11, so that the local bias of the induced current in the plate-shaped member 1 is corrected and the plate-shaped member 1 is relative to the plate-shaped member 1. Allows uniform heating. The second conductor 12 is a water-cooled type and can be heat-treated using a large amount of electric power. The second conductor 12 is preferably cooled by a water-cooled type from the viewpoint of cooling efficiency, but a cooling method other than the water-cooled type may be adopted.

第２導体１２には、板状部材１の少なくとも何れか一方の面に当接することで板状部材１を支持する絶縁性の間隔保持部材１３が設けられている。間隔保持部材１３は、例えばセラミックボール等の球体であり、複数備えられている。間隔保持部材１３は第２導体１２の一方の面にねじ止めや接着等によって固着されている。間隔保持部材１３を構成する球体の夫々には、板状部材１の一方の面に対して点接触する当接部１４が備えられている。 The second conductor 12 is provided with an insulating spacing member 13 that supports the plate-shaped member 1 by abutting on at least one surface of the plate-shaped member 1. The interval holding member 13 is a sphere such as a ceramic ball, and a plurality of the interval holding members 13 are provided. The interval holding member 13 is fixed to one surface of the second conductor 12 by screwing, adhesion, or the like. Each of the spheres constituting the interval holding member 13 is provided with an abutting portion 14 that makes point contact with one surface of the plate-shaped member 1.

第２導体１２が絶縁性の間隔保持部材１３を介して板状部材１を支持することで、板状部材１に対して第２導体１２を適正な間隔で配置することができる。これにより、第２導体１２によって板状部材１を確実に誘導加熱することができる。さらに、板状部材１が第２導体１２によって支持されることで、板状部材１の歪みの発生を抑制することができる。 Since the second conductor 12 supports the plate-shaped member 1 via the insulating spacing member 13, the second conductor 12 can be arranged at an appropriate interval with respect to the plate-shaped member 1. As a result, the plate-shaped member 1 can be reliably induced and heated by the second conductor 12. Further, since the plate-shaped member 1 is supported by the second conductor 12, it is possible to suppress the occurrence of distortion of the plate-shaped member 1.

板状部材１は、絶縁性の間隔保持部材１３を介して第２導体１２に支持された状態で誘導加熱される。このとき、加熱された板状部材１から間隔保持部材１３に熱伝導が起こり、板状部材１の加熱効率が低下することがある。そのため、本構成では、間隔保持部材１３が板状部材１に点接触する当接部１４を複数備えている。これにより、板状部材１と間隔保持部材１３との接触面積が少なくなり両者間の熱伝導が抑制される。その結果、誘導加熱コイル１０による加熱効率の低下を抑制することができ、板状部材１に対する均一な加熱状態を維持することができる。 The plate-shaped member 1 is induced and heated while being supported by the second conductor 12 via an insulating spacing member 13. At this time, heat conduction may occur from the heated plate-shaped member 1 to the interval holding member 13, and the heating efficiency of the plate-shaped member 1 may decrease. Therefore, in this configuration, a plurality of contact portions 14 in which the interval holding member 13 makes point contact with the plate-shaped member 1 are provided. As a result, the contact area between the plate-shaped member 1 and the space-holding member 13 is reduced, and heat conduction between the two is suppressed. As a result, it is possible to suppress a decrease in heating efficiency due to the induction heating coil 10, and it is possible to maintain a uniform heating state for the plate-shaped member 1.

第２導体１２は、回転装置２０に載置されている。第２導体１２及び板状部材１が回転装置２０の軸芯Ｘ周りに回転することで、第１導体１１と板状部材１との距離のばらつきが是正されるため、板状部材１に対する誘導加熱をより均一にすることができる。 The second conductor 12 is mounted on the rotating device 20. Since the second conductor 12 and the plate-shaped member 1 rotate around the axis X of the rotating device 20, the variation in the distance between the first conductor 11 and the plate-shaped member 1 is corrected, so that the guide to the plate-shaped member 1 is induced. The heating can be made more uniform.

〔第２実施形態〕
本実施形態では、図４に示すように、板状部材１の両面に第２導体１２が配置されている。第２導体１２には、板状部材１に対向する側に夫々間隔保持部材１３が設けられている。これにより、板状部材１は間隔保持部材１３を介して両側の第２導体１２，１２によって挟持される。板状部材１は、上方側に位置する第２導体１２の自重を受けて上下両側の第２導体１２，１２の間に保持される。なお、板状部材１の下方側に位置する第２導体１２は回転装置２０に支持されている。 [Second Embodiment]
In the present embodiment, as shown in FIG. 4, the second conductor 12 is arranged on both sides of the plate-shaped member 1. The second conductor 12 is provided with an interval holding member 13 on each side facing the plate-shaped member 1. As a result, the plate-shaped member 1 is sandwiched by the second conductors 12 and 12 on both sides via the spacing member 13. The plate-shaped member 1 receives the weight of the second conductor 12 located on the upper side and is held between the second conductors 12 and 12 on both the upper and lower sides. The second conductor 12 located on the lower side of the plate-shaped member 1 is supported by the rotating device 20.

本構成により、板状部材１の両面に対して第２導体１２による誘導加熱を行うことでき、板状部材１の両面において均一な加熱が可能になる。また、板状部材１の両面に当接する第２導体１２によって板状部材１が挟持されるため、板状部材１の反りをより少なくすることができる。 With this configuration, induction heating can be performed on both sides of the plate-shaped member 1 by the second conductor 12, and uniform heating can be performed on both sides of the plate-shaped member 1. Further, since the plate-shaped member 1 is sandwiched by the second conductor 12 that abuts on both sides of the plate-shaped member 1, the warp of the plate-shaped member 1 can be further reduced.

〔第２実施形態の変形例〕
板状部材１を挟持する第２導体１２、１２は、板状部材１に向けて一方又は双方が押圧付勢されていてもよい。図４では、第２導体１２の付勢部材が破線で示されており、バネ等の付勢部材によって板状部材１が押圧される。本構成により、第２導体１２による板状部材１の挟持力が高まるため、板状部材１の端部の反りをより効果的に抑制することができる。 [Modified example of the second embodiment]
One or both of the second conductors 12 and 12 that sandwich the plate-shaped member 1 may be pressed and urged toward the plate-shaped member 1. In FIG. 4, the urging member of the second conductor 12 is shown by a broken line, and the plate-shaped member 1 is pressed by the urging member such as a spring. With this configuration, the holding force of the plate-shaped member 1 by the second conductor 12 is increased, so that the warp of the end portion of the plate-shaped member 1 can be suppressed more effectively.

〔他の実施形態〕
（１）図５及び図６に示すように、第１導体１１は、板状部材１の平面方向に沿って伸縮変形可能に構成されていてもよい。図５及び図６では、第２導体１２を省略して第１導体１１の伸縮状態を示している。第１導体１１には例えば伸縮変形させるための付勢機構や移動機構等が設けられている。 [Other Embodiments]
(1) As shown in FIGS. 5 and 6, the first conductor 11 may be configured to be stretchable and deformable along the plane direction of the plate-shaped member 1. In FIGS. 5 and 6, the second conductor 12 is omitted to show the stretched state of the first conductor 11. The first conductor 11 is provided with, for example, an urging mechanism, a moving mechanism, and the like for expanding and contracting and deforming.

図５は第１導体１１のコイルが収縮した状態であり、コイルの間隔が狭いため板状部材１が全体的に加熱される。一方、図６は第１導体１１のコイルが伸長した状態であり、コイルの間隔が広くなるため板状部材１は部位によって加熱温度に高低が生じ易い。このように、第１導体１１が伸縮変形することで、板状部材１の平面方向における加熱温度分布を容易に制御することができる。これにより、板状部材１に対してその形状や加熱する部位に応じて効率よく誘導加熱することができる。 FIG. 5 shows a state in which the coil of the first conductor 11 is contracted, and the plate-shaped member 1 is heated as a whole because the distance between the coils is narrow. On the other hand, FIG. 6 shows a state in which the coil of the first conductor 11 is extended, and the interval between the coils is widened, so that the heating temperature of the plate-shaped member 1 tends to be high or low depending on the portion. By expanding and contracting the first conductor 11 in this way, the heating temperature distribution in the plane direction of the plate-shaped member 1 can be easily controlled. As a result, the plate-shaped member 1 can be efficiently induced and heated according to its shape and the portion to be heated.

（２）上記の実施形態では、回転装置２０によって第２導体１２と板状部材１とを回転させる例を示したが、回転装置２０に代えて第２導体１２を回転させずに載置する支持体を設けて構成してもよい。 (2) In the above embodiment, an example in which the second conductor 12 and the plate-shaped member 1 are rotated by the rotating device 20 is shown, but the second conductor 12 is placed without being rotated instead of the rotating device 20. A support may be provided and configured.

（３）上記の実施形態では、間隔保持部材１３を球体にした例を示したが、間隔保持部材１３の形状は球体に特定されない。間隔保持部材１３は、例えば図７に示すように、当接部１４が頂部となる山形形状でもよい。こうすると、板状部材１と接触する当接部１４の領域をより小さくすることができる。間隔保持部材１３は、図８に示すように、側面視において波形状に形成し、当接部１４が板状部材１に線接触するものでもよい。こうすると、板状部材１が間隔保持部材１３によって連続的に支持されるため、板状部材１を安定的に保持することができる。 (3) In the above embodiment, an example in which the interval holding member 13 is made into a sphere is shown, but the shape of the interval holding member 13 is not specified as a sphere. As shown in FIG. 7, for example, the interval holding member 13 may have a chevron shape with the contact portion 14 at the top. In this way, the region of the contact portion 14 in contact with the plate-shaped member 1 can be made smaller. As shown in FIG. 8, the interval holding member 13 may be formed in a wavy shape in a side view, and the contact portion 14 may make line contact with the plate-shaped member 1. In this way, since the plate-shaped member 1 is continuously supported by the interval holding member 13, the plate-shaped member 1 can be stably held.

（４）間隔保持部材１３は、図９に示すように、当接部１４を平坦にして板状部材１と面接触する構成でもよい。こうすると、板状部材１が間隔保持部材１３によって支持される面積が増大するため、板状部材１の単位面積当たりの荷重が小さくなる。これにより、板状部材１の表面に圧痕等が付加されるのを防止することができる。その他、間隔保持部材１３は、全体が角柱状や円柱状でもよい。 (4) As shown in FIG. 9, the interval holding member 13 may have a configuration in which the contact portion 14 is flattened and comes into surface contact with the plate-shaped member 1. As a result, the area in which the plate-shaped member 1 is supported by the spacing member 13 increases, so that the load per unit area of the plate-shaped member 1 becomes small. This makes it possible to prevent indentations and the like from being added to the surface of the plate-shaped member 1. In addition, the interval holding member 13 may be entirely prismatic or columnar.

（５）上記実施形態では、板状部材１と第２導体１２とを回転装置２０に載置した状態で回転させて第１導体１１による加熱を均一にする例を示したが、回転装置２０に代えて、図１０に示すように、板状部材１と第２導体１２とを第１導体１１の内部に対して搬入及び搬出する搬送装置３０を備えてもよい。搬送装置３０と、上記実施形態で示した回転装置２０とを両方を備えて構成してもよい。 (5) In the above embodiment, an example is shown in which the plate-shaped member 1 and the second conductor 12 are rotated while being placed on the rotating device 20 to make the heating by the first conductor 11 uniform. Alternatively, as shown in FIG. 10, a transport device 30 may be provided for carrying in and out the plate-shaped member 1 and the second conductor 12 into the inside of the first conductor 11. The transport device 30 and the rotating device 20 shown in the above embodiment may be provided together.

（６）上記実施形態では、誘導加熱コイル１０によって板状部材１の全体を加熱する例を示したが、誘導加熱コイル１０によって板状部材１の一部を加熱してもよい。
例えば、図１１に示すように、板状部材１において加熱部位に第２導体１２を対向配置し、非加熱部位には間隔保持部材１３を含む第２導体１２と同高さのマスク材１５を対向配置する。これにより、誘導加熱コイル１０によって板状部材１を部分加熱することができる。 (6) In the above embodiment, the whole plate-shaped member 1 is heated by the induction heating coil 10, but a part of the plate-shaped member 1 may be heated by the induction heating coil 10.
For example, as shown in FIG. 11, in the plate-shaped member 1, the second conductor 12 is arranged to face the heated portion, and the mask material 15 having the same height as the second conductor 12 including the interval holding member 13 is placed in the non-heated portion. Place them facing each other. As a result, the plate-shaped member 1 can be partially heated by the induction heating coil 10.

（７）ケースの内部に誘導加熱コイル１０を収容し、ケースに窒素ガスを封入した密閉状態にして板状部材１を誘導加熱すると好適である。こうすると、ケース中に酸素が存在しないため、誘導加熱される板状部材１の酸化を防止することができる。 (7) It is preferable that the induction heating coil 10 is housed inside the case, and the plate-shaped member 1 is induced and heated in a sealed state in which nitrogen gas is sealed in the case. By doing so, since oxygen is not present in the case, it is possible to prevent oxidation of the plate-shaped member 1 which is induced to be heated.

（８）上記実施形態では、板状の第２導体１２を用いた例を示したが、第２導体１２はコイルで形成してもよい。 (8) In the above embodiment, an example in which the plate-shaped second conductor 12 is used is shown, but the second conductor 12 may be formed by a coil.

本発明に係る誘導加熱コイルは、板状部材の熱処理等に広く用いることができる。 The induction heating coil according to the present invention can be widely used for heat treatment of plate-shaped members and the like.

１ ：板状部材
１０ ：誘導加熱コイル
１１ ：第１導体
１２ ：第２導体
１３ ：間隔保持部材
１４ ：当接部
１５ ：マスク材
２０ ：回転テーブル 1: Plate-shaped member 10: Induction heating coil 11: First conductor 12: Second conductor 13: Spacing member 14: Contact portion 15: Mask material 20: Rotating table

Claims (5)

板状部材の熱処理を行うための誘導加熱コイルであって、
前記板状部材を収容するための空間を内部に有し、通電により磁場を発生するコイルである第１導体と、
前記空間内に全体が配置され、前記第１導体への通電により生じる１次磁場により誘導電流が流れる平板状の第２導体と、
前記空間内において前記第２導体の一方の面に設けられた、絶縁性を有する複数の間隔保持部材と、を備え、
前記板状部材の全体は、前記空間内において、複数の前記間隔保持部材を介して前記第２導体に支持され、
前記板状部材は、前記１次磁場により誘導加熱されると共に、前記１次磁場により前記第２導体に生じた前記誘導電流から発生する２次磁場により誘導加熱される誘導加熱コイル。 An induction heating coil for heat treatment of plate-shaped members.
A first conductor, which is a coil that has a space for accommodating the plate-shaped member and generates a magnetic field by energization ,
Said whole space is arranged, the second conductive plate-shaped induction current flows due more results primary field to energization of the first conductor,
A plurality of insulating spacing members provided on one surface of the second conductor in the space are provided.
The entire plate-shaped member is supported by the second conductor in the space via the plurality of spacing members.
The plate-shaped member is an induced heating coil that is induced and heated by the primary magnetic field and is induced and heated by a secondary magnetic field generated from the induced current generated in the second conductor by the primary magnetic field . 複数の前記間隔保持部材の夫々が、球体である請求項１に記載の誘導加熱コイル。 Each of the plurality of the spacing members is, the induction heating coil according to claim 1 which is spherical. 前記第２導体が２つあって、前記板状部材の両面に夫々対向して配置されており、
複数の前記間隔保持部材は、２つの前記第２導体の夫々における前記板状部材に対向する側に設けられている請求項１又は２に記載の誘導加熱コイル。 There are two second conductors, which are arranged so as to face each other on both sides of the plate-shaped member .
The induction heating coil according to claim 1 or 2, wherein the plurality of spacing members are provided on the side of each of the two second conductors facing the plate-shaped member . 前記第１導体が、前記板状部材の平面方向に沿って伸縮変形可能である請求項１〜３の何れか一項に記載の誘導加熱コイル。 The induction heating coil according to any one of claims 1 to 3, wherein the first conductor can be expanded and contracted and deformed along the plane direction of the plate-shaped member. 前記第２導体の前記面に垂直な方向を回転軸芯として前記第２導体を回転させる回転装置を更に備える請求項１〜４の何れか一項に記載の誘導加熱コイル。The induction heating coil according to any one of claims 1 to 4, further comprising a rotating device for rotating the second conductor with a rotation axis perpendicular to the surface of the second conductor.
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