JP2013187132A - Iron core for induction heating roller device and induction heating roller device - Google Patents
Iron core for induction heating roller device and induction heating roller device Download PDFInfo
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- JP2013187132A JP2013187132A JP2012053021A JP2012053021A JP2013187132A JP 2013187132 A JP2013187132 A JP 2013187132A JP 2012053021 A JP2012053021 A JP 2012053021A JP 2012053021 A JP2012053021 A JP 2012053021A JP 2013187132 A JP2013187132 A JP 2013187132A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 206
- 230000006698 induction Effects 0.000 title claims abstract description 59
- 238000010438 heat treatment Methods 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 99
- 239000010959 steel Substances 0.000 claims abstract description 99
- 230000002093 peripheral effect Effects 0.000 claims abstract description 34
- 238000005452 bending Methods 0.000 claims description 103
- 230000004907 flux Effects 0.000 claims description 34
- 230000007246 mechanism Effects 0.000 claims description 16
- 230000008859 change Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 239000011800 void material Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
Description
本発明は、誘導発熱ローラ装置及び当該誘導発熱ローラ装置に用いられる鉄心に関するものである。 The present invention relates to an induction heat roller device and an iron core used in the induction heat roller device.
例えば従来の誘導発熱ローラ装置は、回転するローラと、当該ローラの内部に配置された磁束発生機構とによって主として構成されており、この磁束発生機構は一般的に、固定された円筒状鉄心と、この円筒状鉄心に巻装された誘導コイルとによって構成されている。 For example, a conventional induction heating roller device is mainly configured by a rotating roller and a magnetic flux generation mechanism disposed inside the roller, and the magnetic flux generation mechanism generally includes a fixed cylindrical iron core, The induction coil is wound around the cylindrical iron core.
そして、上記鉄心としては、図１３に示すように、鉄心鋼板を巻回して構成した巻鉄心を用いている。しかしながら、この巻鉄心は、その鉄心鋼板と誘導コイルとが同方向に巻回されることから、鉄心鋼板自身が誘導コイルの二次巻線として作用し、その巻回方向に短絡電流が発生して鉄心が発熱してしまう。この短絡電流の発生を防止するために、巻鉄心の円周上にスリットを設ける必要がある。そうすると、巻鉄心自体の剛性が失われてしまい、自重による撓みが大きくなってしまうという問題がある。また、誘導コイルの励磁によって生じる漏洩磁束が鉄心鋼板をその厚さ方向に貫通することになるため、鉄心鋼板に渦電流が発生し、これが巻鉄心の発熱原因となる。巻鉄心が発熱すれば、巻鉄心の磁気特性が低下するばかりでなく、これに巻回されている誘導コイルの電気特性、絶縁特性等も低下してしまう。 And as the said iron core, as shown in FIG. 13, the wound iron core comprised by winding an iron core steel plate is used. However, in this wound iron core, the iron core steel plate and the induction coil are wound in the same direction, so the iron core steel plate itself acts as the secondary winding of the induction coil, and a short-circuit current is generated in the winding direction. The iron core will generate heat. In order to prevent the occurrence of this short-circuit current, it is necessary to provide a slit on the circumference of the wound core. If it does so, the rigidity of a wound iron core itself will be lost, and there exists a problem that the bending by own weight will become large. Moreover, since the leakage magnetic flux generated by the excitation of the induction coil penetrates the iron core steel sheet in the thickness direction, an eddy current is generated in the iron core steel sheet, which causes heat generation of the wound iron core. If the wound iron core generates heat, not only the magnetic characteristics of the wound iron core will be degraded, but also the electrical characteristics, insulation characteristics, etc. of the induction coil wound around it will be degraded.
一方、本出願人は上記問題点を解決するため、特許文献１及び特許文献２に示すように、幅方向断面において湾曲形状をなす湾曲部と、当該湾曲部の幅方向内径側に連続して形成された屈曲部とを有する多数枚の鉄心鋼板を円筒状に積層してなる鉄心を発明している。この鉄心によれば、巻装された誘導コイルが励磁された際に、これによって生じる漏洩磁束が鉄心鋼板にその厚さ方向に貫通することを低減することができる。これにより、渦電流の発生を低減することができ、鉄心の磁気特性のみならず誘導コイルの電気特性、絶縁特性の低下が回避できるといった、多くの利点が得られる。 On the other hand, in order to solve the above problems, the present applicant, as shown in Patent Document 1 and Patent Document 2, continuously forms a curved portion having a curved shape in the cross section in the width direction, and a width direction inner diameter side of the curved portion. Invented is an iron core formed by laminating a large number of iron core steel plates having a bent portion in a cylindrical shape. According to this iron core, when the wound induction coil is excited, it is possible to reduce the leakage magnetic flux generated thereby from penetrating the iron core steel sheet in the thickness direction. Thereby, generation | occurrence | production of an eddy current can be reduced and many advantages, such as not only the magnetic characteristic of an iron core but the fall of the electrical characteristic of an induction coil and an insulation characteristic can be acquired.
しかしながら、従来の誘導発熱ローラ装置では、磁束発生機構により発生した磁束は主として、鉄心の軸方向端面、及び、ローラ本体における前記鉄心の軸方向端面に対向する対向面を通過する。ここで、鉄心の軸方向端面及びローラ本体の対向面は、ローラ本体の軸方向における熱膨張量及び鉄心の軸方向における熱膨張量の差を考慮して一定距離以上離間させる必要がある。その結果、鉄心の軸方向端面とローラ本体の対向面との間に形成される空間により磁気抵抗が大きくなってしまうという問題がある。また、ローラ本体の軸方向における熱膨張量及び鉄心の軸方向における熱膨張量によって、鉄心の軸方向端面及びローラ本体の対向面の距離が変化して磁気抵抗が変化してしまい、ローラ本体を通過する磁束が変化してローラ本体の温度も変化してしまう。 However, in the conventional induction heating roller device, the magnetic flux generated by the magnetic flux generation mechanism mainly passes through the axial end surface of the iron core and the facing surface facing the axial end surface of the iron core in the roller body. Here, the axial end surface of the iron core and the facing surface of the roller main body need to be separated by a certain distance or more in consideration of the difference between the thermal expansion amount in the axial direction of the roller main body and the thermal expansion amount in the axial direction of the iron core. As a result, there is a problem that the magnetic resistance increases due to the space formed between the axial end surface of the iron core and the opposing surface of the roller body. In addition, the distance between the axial end surface of the iron core and the opposed surface of the roller body changes due to the amount of thermal expansion in the axial direction of the roller body and the amount of thermal expansion in the axial direction of the iron core, and the magnetic resistance changes. The passing magnetic flux changes and the temperature of the roller body also changes.
そこで本発明は、上記問題点を一挙に解決するためになされたものであり、ローラ本体と鉄心との間の磁気抵抗を可及的に小さくするとともに、その磁気抵抗が変化しにくい構成とすることをその主たる課題とするものである。 Accordingly, the present invention has been made to solve the above-mentioned problems all at once, and has a configuration in which the magnetic resistance between the roller body and the iron core is made as small as possible and the magnetic resistance is hardly changed. Is the main issue.
すなわち本発明に係る誘導発熱ローラ装置用鉄心は、ローラ本体の内部に当該ロ−ラ本体の軸方向に沿って配置される磁束発生機構を構成するものであり、誘導コイルが巻装される誘導発熱ローラ装置用鉄心であって、幅方向断面において湾曲形状をなす湾曲部を有する長尺状をなす複数の鉄心鋼板を円筒状に積み重ねることにより形成された円筒状鉄心部と、前記円筒状鉄心部の軸方向における少なくとも一方の端部外周面に設けられており、幅方向断面において湾曲形状をなす湾曲部を有する短尺状をなす複数の鉄心鋼板を円筒状に積み重ねることにより形成されたリング状鉄心部とを有することを特徴とする。 That is, the iron core for an induction heating roller device according to the present invention constitutes a magnetic flux generation mechanism disposed along the axial direction of the roller body inside the roller body, and the induction coil is wound around the induction coil. An iron core for a heating roller device, wherein the cylindrical iron core is formed by stacking a plurality of elongated steel core steel plates in a cylindrical shape having a curved portion having a curved shape in a cross-section in the width direction, and the cylindrical iron core A ring shape formed by stacking a plurality of short steel core steel plates in a cylindrical shape having a curved portion having a curved shape in a cross section in the width direction, provided on the outer peripheral surface of at least one end in the axial direction of the portion It has an iron core part.
このようなものであれば、円筒状鉄心部の軸方向における少なくとも一方の端部外周面にリング状鉄心部を設けることによって、当該リング状鉄心部がローラ本体に至る磁路を形成することになり、磁束発生機構により発生される磁束が、リング状鉄心部の外周面及び当該外周面に対向するローラ本体の対向面を通過する。これにより、磁束発生機構により発生される磁束を効率良くローラ本体に導くことができ、円筒状鉄心部の軸方向端面及び外周面からの漏洩磁束を少なくすることができ、誘導発熱ローラ装置における力率を改善することができる。また、径方向に対向するリング状鉄心部の外周面及び当該外周面に対向するローラ本体の対向面に磁束を通す構成であるため、それらの熱膨張量の差が生じにくいため、対向面間の間隙を可及的に小さくすることができる。さらに、磁束発生機構により発生された磁束は主として、リング状鉄心部の外周面及びローラ本体におけるリング状鉄心部の外周面に対向する内周面を通過することになり、当該リング状鉄心部の外周面及びローラ本体の内周面との間に形成される空間は、円筒状鉄心部に軸方向に形成される空間に比べて、熱膨張量の差による変化が小さく、磁気抵抗の変化を抑えることができる。 In such a case, by providing a ring-shaped core part on the outer peripheral surface of at least one end in the axial direction of the cylindrical core part, the ring-shaped core part forms a magnetic path that reaches the roller body. Thus, the magnetic flux generated by the magnetic flux generation mechanism passes through the outer peripheral surface of the ring-shaped iron core and the opposing surface of the roller body facing the outer peripheral surface. As a result, the magnetic flux generated by the magnetic flux generation mechanism can be efficiently guided to the roller body, the leakage magnetic flux from the axial end surface and the outer peripheral surface of the cylindrical iron core can be reduced, and the force in the induction heating roller device can be reduced. The rate can be improved. In addition, since the magnetic flux is passed through the outer peripheral surface of the ring-shaped iron core that faces in the radial direction and the opposing surface of the roller body that faces the outer peripheral surface, the difference in thermal expansion between them is less likely to occur. Can be made as small as possible. Furthermore, the magnetic flux generated by the magnetic flux generation mechanism passes mainly through the outer peripheral surface of the ring-shaped core part and the inner peripheral surface of the roller body that faces the outer peripheral surface of the ring-shaped core part. The space formed between the outer peripheral surface and the inner peripheral surface of the roller body is less changed by the difference in thermal expansion than the space formed in the axial direction in the cylindrical iron core, and the change in magnetic resistance is reduced. Can be suppressed.
前記リング状鉄心部を構成する鉄心鋼板が、幅方向断面において湾曲形状をなす湾曲部と、当該湾曲部の幅方向内径側において前記湾曲部の湾曲方向に屈曲して形成された内側屈曲部とを有することが望ましい。これならば、リング状鉄心部を製造する過程において、湾曲部及び内側屈曲部により形成される凹部に、別の鉄心鋼板の湾曲部及び内側屈曲部により形成される凸部を嵌めるように積層すれば良く積層作業を容易にすることができる。また、内側屈曲部が形成されていることにより、鉄心鋼板の幅方向の向きを判断し易いことからも積層作業を容易にすることができる。さらに、積層した後のリング状鉄心部においては、内側屈曲部が係合し合うことにより、鉄心鋼板が径方向に抜脱してしまうことを防止することができる。 The iron core steel plate constituting the ring-shaped iron core portion has a curved portion having a curved shape in the cross section in the width direction, and an inner bent portion formed by bending in the bending direction of the curved portion on the inner diameter side of the curved portion. It is desirable to have If this is the case, in the process of manufacturing the ring-shaped iron core part, the concave part formed by the curved part and the inner bent part is laminated so that the convex part formed by the curved part and the inner bent part of another iron core steel sheet can be fitted. The stacking operation can be facilitated. Further, since the inner bent portion is formed, the laminating operation can be facilitated because it is easy to determine the direction of the iron core steel plate in the width direction. Furthermore, in the ring-shaped iron core part after lamination | stacking, it can prevent that an iron core steel plate pulls out by radial direction by an inner side bending part engaging.
前記リング状鉄心部の円周方向の一部に、前記円筒状鉄心に巻装された誘導コイルを外部に延出するための延出開口部が形成されていることが望ましい。具体的にはリング状鉄心部を、円周方向の一部が取り除かれた部分円環状をなすものとすることが考えられる。これならば、誘導発熱ローラ装置用鉄心の周囲に設けられる部材（例えばローラ本体）に特別な加工を施す必要が無く、製造コストを削減することができる。 It is desirable that an extension opening for extending the induction coil wound around the cylindrical core is formed in a part of the ring-shaped core in the circumferential direction. Specifically, it is conceivable that the ring-shaped iron core portion has a partial annular shape with a part in the circumferential direction removed. In this case, it is not necessary to perform special processing on the member (for example, a roller body) provided around the iron core for the induction heat roller device, and the manufacturing cost can be reduced.
前記円筒状鉄心部を構成する鉄心鋼板が、幅方向一端側に設けられた湾曲形状をなす第１の湾曲部と、幅方向他端側に設けられ、前記第１の湾曲部と同一方向に湾曲する湾曲形状をなす第２の湾曲部と、前記第１の湾曲部の幅方向内径側において第１の湾曲部の湾曲方向側に屈曲した第１の屈曲部、及び前記第２の湾曲部の幅方向外径側において第２の湾曲部の湾曲方向とは反対側に屈曲した第２の屈曲部を介して、前記第１の湾曲部及び前記第２の湾曲部に連続して形成された中間連結部とを有することが望ましい。これならば、鉄心鋼板が、第１の屈曲部及び第２の屈曲部を介して中間連結部を有しているので、各鉄心鋼板の剛性を大きくすることができ、その鉄心鋼板を複数用いて構成された円筒状鉄心部の剛性を大きくすることができる。したがって、誘導発熱ローラ装置用鉄心の固有振動数を上げることができ、誘導発熱ローラ装置の高速回転が可能となる。また、第１の湾曲部及び第２の湾曲部の間に第１の屈曲部及び第２の屈曲部を介して中間連結部を有する構成であるため、鉄心鋼板の中央部に屈曲部を形成することができ、鉄心鋼板のフォーミング加工を容易にすることができる。また、円筒状鉄心を製造する過程においては、各鉄心鋼板の第１の屈曲部同士及び第２の屈曲部同士を係合させるように重ね合わせれば良いので、円筒状鉄心の製造作業を簡単にすることができる。ここで、各鉄心鋼板それぞれが幅方向に凹凸形状を有することから、各鉄心鋼板の幅方向の位置決めを容易にすることができる。さらに、それら屈曲部同士が係合することにより、鉄心鋼板が径方向に抜脱してしまうことを防止することができる。 The iron core steel plate constituting the cylindrical iron core portion is provided with a first bending portion having a curved shape provided on one end side in the width direction, and provided on the other end side in the width direction, in the same direction as the first bending portion. A second bending portion having a bending shape, a first bending portion bent toward the bending direction of the first bending portion on the inner diameter side in the width direction of the first bending portion, and the second bending portion; The second bending portion is formed continuously to the first bending portion and the second bending portion via a second bending portion bent to the opposite side to the bending direction of the second bending portion on the outer diameter side in the width direction. It is desirable to have an intermediate connecting part. If this is the case, since the iron core steel plate has the intermediate connecting portion via the first bent portion and the second bent portion, the rigidity of each iron core steel plate can be increased, and a plurality of the iron core steel plates are used. The rigidity of the cylindrical iron core portion configured as described above can be increased. Therefore, the natural frequency of the iron core for the induction heat roller device can be increased, and the induction heat roller device can be rotated at high speed. Moreover, since it is the structure which has an intermediate | middle connection part via the 1st bending part and the 2nd bending part between the 1st bending part and the 2nd bending part, a bending part is formed in the center part of an iron core steel plate And forming the iron core steel sheet can be facilitated. In addition, in the process of manufacturing the cylindrical iron core, it is only necessary to overlap the first bent portions and the second bent portions of each iron core steel sheet so that the manufacturing operation of the cylindrical iron core can be easily performed. can do. Here, since each iron core steel plate has a concavo-convex shape in the width direction, positioning of each iron core steel plate in the width direction can be facilitated. Furthermore, it is possible to prevent the core steel sheet from being pulled out in the radial direction by engaging the bent portions.
円筒状鉄心部を構成する鉄心鋼板のフォーミング加工をより一層容易にするためには、前記第１の湾曲部の幅方向寸法と、前記第２の湾曲部の幅方向寸法とが略同一であることが望ましい。 In order to further facilitate the forming process of the iron core steel plate constituting the cylindrical iron core portion, the width-direction size of the first bending portion and the width-direction size of the second bending portion are substantially the same. It is desirable.
さらに円筒状鉄心部を構成する鉄心鋼板の剛性を大きくするとともに、各鉄心鋼板を積み重ねる作業を容易にするだけでなく、鉄心鋼板が径方向に抜脱してしまうことを一層好適に防止するためには、前記円筒状鉄心部を構成する鉄心鋼板が、前記第２の湾曲部の幅方向内径側において第２の湾曲部の湾曲方向側に屈曲した第３の屈曲部を介して、前記第２の湾曲部に連続して形成された折れ曲がり部を有することが望ましい。 In addition to increasing the rigidity of the core steel sheet constituting the cylindrical core part and not only facilitating the work of stacking the core steel sheets, but also more suitably preventing the core steel sheets from being pulled out in the radial direction. The second steel sheet is formed through a third bent portion where the iron core steel plate constituting the cylindrical iron core portion is bent toward the bending direction side of the second bending portion on the inner diameter side in the width direction of the second bending portion. It is desirable to have a bent portion formed continuously with the curved portion.
このように構成した本発明によれば、ローラ本体と鉄心との間の磁気抵抗を可及的に小さくするとともに、その磁気抵抗が変化しにくい構成とすることができる。 According to the present invention configured as described above, the magnetic resistance between the roller body and the iron core can be made as small as possible, and the magnetic resistance can hardly be changed.
以下に本発明に係る誘導発熱ローラ装置用鉄心の一実施形態について図面を参照して説明する。 Hereinafter, an embodiment of an iron core for an induction heating roller device according to the present invention will be described with reference to the drawings.
本実施形態に係る誘導発熱ローラ装置用鉄心１００は、図１に示すように、例えば樹脂フィルム、紙、布、不織布、金属箔などのシート材又はウエブ材の連続熱処理工程又は合成繊維の熱延伸処理工程等において用いられる誘導発熱ローラ装置の磁束発生機構１０に用いられるものである。この磁束発生機構１０は、回転自在のローラ本体１１の内部に当該ロ−ラ本体１１の軸方向に沿って配置されるものであり、誘導発熱ローラ装置用鉄心１００に誘導コイル１２が巻装されることによって構成される。 As shown in FIG. 1, the iron core 100 for induction heat roller apparatus according to the present embodiment is a continuous heat treatment process of a sheet material or web material such as a resin film, paper, cloth, nonwoven fabric, or metal foil, or heat stretching of synthetic fibers. It is used for the magnetic flux generation mechanism 10 of the induction heating roller device used in the processing process or the like. The magnetic flux generating mechanism 10 is disposed inside a rotatable roller body 11 along the axial direction of the roller body 11, and an induction coil 12 is wound around the iron core 100 for the induction heating roller device. It is composed by doing.
具体的に誘導発熱ローラ装置用鉄心１００は、図２に示すように、円筒状をなす円筒状鉄心部１と、当該円筒状鉄心部１の軸方向において両端部に設けられた２つのリング状鉄心部３とを有する。 Specifically, as shown in FIG. 2, the iron core 100 for the induction heating roller device includes a cylindrical core portion 1 having a cylindrical shape and two ring shapes provided at both ends in the axial direction of the cylindrical core portion 1. And an iron core part 3.
円筒状鉄心部１は、図２及び図３に示すように、長尺状をなす複数の鉄心鋼板２を、幅方向にずらして積み重ねることにより円筒状に積層して形成されたものである。 As shown in FIGS. 2 and 3, the cylindrical iron core portion 1 is formed by stacking a plurality of long steel core steel plates 2 in a cylindrical shape by stacking them while shifting in the width direction.
鉄心鋼板２は、例えば表面に絶縁皮膜が施された方向性電磁鋼板（珪素鋼板）により形成されており、その板厚が例えば約０．３ｍｍの長尺形状をなすものである。また、鉄心鋼板２は、長手方向（つまり、製品組み立て後における磁束通過方向）に磁束方向性が向くように形成されている。この鉄心鋼板２を用いることにより、磁気特性に優れた円筒状鉄心部１を得ることができる。したがって、円筒状鉄心部１の断面積を小さくすることができ、当該円筒状鉄心部１を用いた磁束発生機構１０を小型化できるだけでなく、誘導コイル１２に使用する電線量も低減することができる。 The iron core steel plate 2 is formed of, for example, a directional electromagnetic steel plate (silicon steel plate) having an insulating film on its surface, and has a long shape with a thickness of, for example, about 0.3 mm. Moreover, the iron core steel plate 2 is formed so that the magnetic flux directionality is directed in the longitudinal direction (that is, the magnetic flux passage direction after product assembly). By using this iron core steel plate 2, a cylindrical iron core portion 1 having excellent magnetic properties can be obtained. Therefore, the cross-sectional area of the cylindrical core part 1 can be reduced, and not only the magnetic flux generation mechanism 10 using the cylindrical core part 1 can be reduced in size, but also the amount of electric wires used for the induction coil 12 can be reduced. it can.
そしてこの鉄心鋼板２は、図３及び図４に示すように、等断面形状をなすものであり、幅方向一端側（幅方向外径側）に設けられた湾曲形状をなす第１の湾曲部２１と、幅方向他端側（幅方向内径側）に設けられて、第１の湾曲部２１と同一方向に湾曲する湾曲形状をなす第２の湾曲部２２と、第１の湾曲部２１及び前記第２の湾曲部２２に連続して形成された中間連結部２３とを有する。 As shown in FIGS. 3 and 4, the iron core steel plate 2 has an equal cross-sectional shape, and is a first curved portion having a curved shape provided at one end in the width direction (outer diameter side in the width direction). 21, a second bending portion 22 that is provided on the other end side in the width direction (inner side in the width direction) and has a bending shape that curves in the same direction as the first bending portion 21, the first bending portion 21, and And an intermediate connecting portion 23 formed continuously with the second bending portion 22.
本実施形態の第１の湾曲部２１及び第２の湾曲部２２は、互いに略同一の湾曲形状をなすものであり、全体に亘って一定の曲率で湾曲しているもの、又は、連続して曲率が変化しながら湾曲するものが考えられ、例えばインボリュート曲線の一部を用いたインボリュート形状、部分円弧形状又は部分楕円形状などが考えられる。 The first curved portion 21 and the second curved portion 22 of the present embodiment have substantially the same curved shape, and are curved with a constant curvature throughout, or continuously. One that curves while the curvature changes can be considered, for example, an involute shape using a part of an involute curve, a partial arc shape, a partial ellipse shape, or the like.
また、第１の湾曲部２１及び第２の湾曲部２２の幅方向長さは、互いに略同一である。これにより中間連結部２３は、鉄心鋼板２の幅方向において略中央部に形成される。 Moreover, the width direction length of the 1st bending part 21 and the 2nd bending part 22 is mutually substantially the same. Thereby, the intermediate | middle connection part 23 is formed in the approximate center part in the width direction of the iron core steel plate 2. As shown in FIG.
中間連結部２３は、第１の湾曲部２１の幅方向内側である幅方向内径側において第１の湾曲部２１の湾曲方向側に屈曲した第１の屈曲部２４、及び第２の湾曲部２２の幅方向内側である幅方向外径側において第２の湾曲部２２の湾曲方向とは反対側に屈曲した第２の屈曲部２５を介して、第１の湾曲部２１の幅方向内径側及び第２の湾曲部２２の幅方向外径側を連結する概略平板状をなすものである。なお、幅方向内側とは、鉄心鋼板２の断面全体における幅方向の内側のことであり、第１の湾曲部２１の幅方向内側は幅方向内径側であり、第２の湾曲部２２の幅方向内側は幅方向外径側である。 The intermediate connecting portion 23 includes a first bent portion 24 that is bent toward the bending direction side of the first bending portion 21 and a second bending portion 22 on the inner side in the width direction that is the inner side in the width direction of the first bending portion 21. The inner side of the first bending portion 21 in the width direction and the second bending portion 25 bent to the opposite side of the bending direction of the second bending portion 22 on the outer side in the width direction of The second curved portion 22 has a substantially flat plate shape that connects the outer diameter sides in the width direction. The inner side in the width direction is the inner side in the width direction of the entire cross section of the iron core steel plate 2, the inner side in the width direction of the first bending portion 21 is the inner side in the width direction, and the width of the second bending portion 22. The inner side in the direction is the outer diameter side in the width direction.
第１の屈曲部２４は、第１の湾曲部２１の幅方向内径側に対する中間連結部２３の屈曲角度θ１が例えば３０度〜６０度となるように形成されている。また、第２の屈曲部２５は、第２の湾曲部２２の幅方向外径側に対する中間連結部２３の屈曲角度θ２が例えば３０度〜６０度となるように形成されている。なお、本実施形態では、屈曲角度θ１及び屈曲角度θ２を互いに同一の角度としている。また、鉄心鋼板２を一方向からプレス加工により成形することを考えると、屈曲角度θ１、θ２は、鋭角であることが望ましい。 The first curved portion 24 is formed such that the bending angle theta 1 of the intermediate connecting portion 23 is for example 30 to 60 degrees with respect to the width direction inner diameter side of the first bending portion 21. The second bent portion 25 is formed such that the bending angle theta 2 of the intermediate connecting portion 23 is for example 30 to 60 degrees with respect to the width direction outer diameter side of the second bending section 22. In the present embodiment, the bending angle θ 1 and the bending angle θ 2 are the same angle. Further, considering that the iron core steel plate 2 is formed by pressing from one direction, the bending angles θ 1 and θ 2 are preferably acute angles.
リング状鉄心部３は、図２及び図５に示すように、円筒状鉄心部１の外周面において、誘導コイル１２の軸方向外側に配置されるものであり、前記鉄心鋼板２よりも短い短尺状をなす複数の鉄心鋼板４を、幅方向にずらして積み重ねることにより円筒状に積層して形成されたものである。 As shown in FIGS. 2 and 5, the ring-shaped core part 3 is arranged on the outer peripheral surface of the cylindrical core part 1 on the outer side in the axial direction of the induction coil 12, and is shorter than the core steel sheet 2. A plurality of iron core steel plates 4 having a shape are stacked and shifted in the width direction to be stacked in a cylindrical shape.
鉄心鋼板４は、例えば表面に絶縁皮膜が施された方向性電磁鋼板（珪素鋼板）により形成されており、その板厚が例えば約０．３ｍｍの短尺形状をなすものである。 The iron core steel plate 4 is formed of, for example, a directional electromagnetic steel plate (silicon steel plate) having an insulating film on its surface, and has a short shape with a thickness of about 0.3 mm, for example.
そしてこの鉄心鋼板４は、図５及び図６に示すように、等断面形状をなすものであり、幅方向一端側に設けられた湾曲形状をなす湾曲部４１と、当該湾曲部４１の幅方向内径側に連続して形成された内側屈曲部４２とを有する。ここで、湾曲部４１に対する内側屈曲部４２の屈曲角度θ４は例えば３０度〜６０度である。なお、リング状鉄心部３を構成する鉄心鋼板４として、前記円筒状鉄心部１と同様の断面形状をなす鉄心鋼板２を用いても良い。 As shown in FIGS. 5 and 6, the iron core steel plate 4 has an equal cross-sectional shape, a curved portion 41 having a curved shape provided at one end in the width direction, and the width direction of the curved portion 41. And an inner bent portion 42 continuously formed on the inner diameter side. Here, the bending angle θ 4 of the inner bending portion 42 with respect to the bending portion 41 is, for example, 30 degrees to 60 degrees. In addition, you may use the iron core steel plate 2 which makes the cross-sectional shape similar to the said cylindrical iron core part 1 as the iron core steel plate 4 which comprises the ring-shaped iron core part 3. FIG.
このように構成された誘導発熱ローラ装置用鉄心１００を用いた誘導発熱ローラ装置によれば、図７に示すように、磁束発生機構１０により発生された磁束は、円筒状鉄心部１を軸方向に通過し、当該円筒状鉄心部１の軸方向における両端部に設けられたリング状鉄心部３を径方向に通過し、リング状鉄心部３の外周面及びローラ本体１１におけるリング状鉄心部３の外周面に対向する内周面を通過するとともに、ローラ本体１１の側周壁を軸方向に沿って通過する。 According to the induction heat roller device using the iron core 100 for the induction heat roller device thus configured, as shown in FIG. 7, the magnetic flux generated by the magnetic flux generation mechanism 10 passes through the cylindrical core portion 1 in the axial direction. Passes through the ring-shaped core 3 provided at both ends in the axial direction of the cylindrical core 1 in the radial direction, and the ring-shaped core 3 in the outer peripheral surface of the ring-shaped core 3 and the roller body 11. And passes through the side peripheral wall of the roller body 11 along the axial direction.
ここで円筒状に積層された鉄心鋼板２の幅方向外径側端部が円筒状鉄心部１の外周となり、鉄心鋼板２の幅方向内径側端部が円筒状鉄心部１の内周となる。なお、第１の湾曲部２１及び第２の湾曲部２２の曲率によって円筒状鉄心部１の外径を調整することができる。 Here, the end portion on the outer diameter side of the iron core steel plate 2 laminated in a cylindrical shape becomes the outer periphery of the cylindrical iron core portion 1, and the end portion on the inner diameter side of the iron core steel plate 2 becomes the inner periphery of the cylindrical iron core portion 1. . The outer diameter of the cylindrical core portion 1 can be adjusted by the curvatures of the first bending portion 21 and the second bending portion 22.
また、図３に示すように、鉄心鋼板２の第１の湾曲部２１及び中間連結部２３により形成される凹部が、他の鉄心鋼板２の第１の湾曲部２１及び中間連結部２３により形成される凸部に係合する。また、鉄心鋼板２の第２の湾曲部２２及び中間連結部２３により形成される凸部が、他の鉄心鋼板２の第２の湾曲部２２及び中間連結部２３により形成される凹部に係合する。これにより鉄心鋼板２の積層過程での積層崩れを防止することができ、また確実に積層することができる。また積層された鉄心鋼板２は、径方向に引き抜こうとしても係合している第１の屈曲部２４同士及び第２の屈曲部２５同士によって、その引き抜きが防止される。 Moreover, as shown in FIG. 3, the recessed part formed of the 1st curved part 21 and the intermediate | middle connection part 23 of the iron core steel plate 2 is formed of the 1st curved part 21 and the intermediate | middle connection part 23 of another iron core steel plate 2. As shown in FIG. Engage with the raised protrusion. Further, the convex portion formed by the second curved portion 22 and the intermediate connecting portion 23 of the iron core steel plate 2 is engaged with the concave portion formed by the second curved portion 22 and the intermediate connecting portion 23 of the other iron core steel plate 2. To do. As a result, it is possible to prevent the collapse of the stack in the process of stacking the iron core steel plates 2, and it is possible to reliably stack. Further, the laminated iron core steel plates 2 are prevented from being pulled out by the first bent portions 24 and the second bent portions 25 that are engaged with each other even when trying to pull out in the radial direction.
このように構成された円筒状鉄心部１において各鉄心鋼板２は等価的に放射状に並べられたものとなり、これに誘導コイル１２を巻装しても短絡電流は発生しない。また、誘導コイル１２により生じる漏洩磁束が、鉄心鋼板２にその厚さ方向に貫通することを低減できるので、渦電流の発生を低減することができ、円筒状鉄心部１の磁気特性のみならず誘導コイル１２の電気特性、絶縁特性の低下を回避することができる。 In the thus configured cylindrical iron core portion 1, the iron core steel plates 2 are equivalently arranged radially, and no short-circuit current is generated even when the induction coil 12 is wound around the iron core steel plates 2. Further, since leakage magnetic flux generated by the induction coil 12 can be reduced from penetrating the iron core steel plate 2 in the thickness direction, generation of eddy current can be reduced, and not only the magnetic characteristics of the cylindrical iron core portion 1 can be reduced. It is possible to avoid a decrease in the electrical characteristics and insulation characteristics of the induction coil 12.
さらに、円筒状に積層された鉄心鋼板４の幅方向外径側端部がリング状鉄心部３の外周となり、鉄心鋼板４の幅方向内径側端部がリング状鉄心部３の内周となる。リング状鉄心部３の内周は、前記円筒状鉄心部１の外周と略同一であり、リング状鉄心部３を円筒状鉄心部１に設けた状態において、リング状鉄心部３の内周面と円筒状鉄心部１の外周面とは略全周に亘って接触する。なお、湾曲部４１の曲率によってリング状鉄心部３の外径を調整することができる。 Further, the end in the width direction of the iron core steel plate 4 stacked in a cylindrical shape becomes the outer periphery of the ring-shaped iron core portion 3, and the end in the width direction of the iron core steel plate 4 becomes the inner periphery of the ring-shaped iron core portion 3. . The inner periphery of the ring-shaped core part 3 is substantially the same as the outer periphery of the cylindrical core part 1, and the inner peripheral surface of the ring-shaped core part 3 in a state where the ring-shaped core part 3 is provided on the cylindrical core part 1. And the outer peripheral surface of the cylindrical core portion 1 are in contact with each other over substantially the entire circumference. Note that the outer diameter of the ring-shaped iron core 3 can be adjusted by the curvature of the curved portion 41.
このように構成したリング状鉄心部３を円筒状鉄心部１の軸方向における両端部に外側から装着する（図８上段参照）。その後、円筒状鉄心部１の軸方向端面及びリング状鉄心部３の軸方向端面を面一にするとともに、それらの軸方向端面の両方に接触するように例えば円環状をなす固定リング５を例えばＴＩＧ溶接により溶接する（図８下段参照）。このようにして、誘導発熱ローラ装置用鉄心１００が製造される。 The ring-shaped iron core portion 3 configured as described above is attached to both end portions in the axial direction of the cylindrical iron core portion 1 from the outside (see the upper part of FIG. 8). Thereafter, the axial end surface of the cylindrical core portion 1 and the axial end surface of the ring-shaped core portion 3 are flush with each other, and the fixing ring 5 having an annular shape, for example, is brought into contact with both the axial end surfaces. Weld by TIG welding (see the lower part of FIG. 8). In this way, the iron core 100 for the induction heat roller device is manufactured.
なお、上記の方法により製造した円筒状鉄心部１の軸方向における端部外周面にリング状鉄心部３を構成する鉄心鋼板４を、その幅方向内径側端部を当接させつつ順次積層させることによってリング状鉄心部３を構成しても良い。その他、リング状鉄心部３を複数に分割して積層した分割要素を予め製作しておき、その各分割要素を円筒状鉄心部１に幅方向における端部外周面に円周方向に並べて装着することによって、リング状鉄心部３を構成しても良い。また、リング状鉄心部３を予め製作しておき、当該リング状鉄心部３の内側周面に鉄心鋼板２を幅方向外径側端部を当接させつつ、内側周面に沿って順次積層していくことで、円筒状鉄心部１を構成しても良い。これにより、円筒状鉄心部１の製作とともに、当該円筒状鉄心部１の軸方向両端部にリング状鉄心部３の装着が同時に行われる。 In addition, the core steel plate 4 which comprises the ring-shaped iron core part 3 is laminated | stacked sequentially, making the width direction inner diameter side edge part contact | abut on the outer peripheral surface of the edge part in the axial direction of the cylindrical iron core part 1 manufactured by said method. You may comprise the ring-shaped iron core part 3 by this. In addition, a split element in which the ring-shaped core part 3 is divided into a plurality of layers is manufactured in advance, and each split element is attached to the cylindrical core part 1 side by side in the circumferential direction on the outer peripheral surface of the end in the width direction. By doing so, the ring-shaped iron core 3 may be configured. In addition, the ring-shaped iron core portion 3 is manufactured in advance, and the iron core steel plate 2 is sequentially laminated along the inner peripheral surface while the widthwise outer diameter side end is brought into contact with the inner peripheral surface of the ring-shaped iron core portion 3. By doing so, you may comprise the cylindrical iron core part 1. FIG. Thereby, the production of the cylindrical core part 1 and the attachment of the ring-shaped core part 3 to the both axial ends of the cylindrical core part 1 are simultaneously performed.
このように構成した本実施形態に係る誘導発熱ローラ装置用鉄心１００によれば、円筒状鉄心部１の軸方向における少なくとも一方の端部外周面にリング状鉄心部３を設けることによって、当該リング状鉄心部３がローラ本体１１に至る磁路を形成することになり、磁束発生機構１０により発生される磁束が、リング状鉄心部３の外周面及び当該外周面に対向するローラ本体１１の対向面を通過する。これにより、磁束発生機構１０により発生される磁束を効率良くローラ本体１１に導くことができ、円筒状鉄心部１の軸方向端面及び外周面からの漏洩磁束を少なくすることができ、誘導発熱ローラ装置における力率を改善することができる。また、径方向に対向するリング状鉄心部３の外周面及び当該外周面に対向するローラ本体１１の対向面に磁束を通す構成であるため、それらの熱膨張量の差が生じにくいため、対向面間の間隙を可及的に小さくすることができる。さらに、磁束発生機構１０により発生された磁束は主として、リング状鉄心部３の外周面及びローラ本体１１におけるリング状鉄心部３の外周面に対向する内周面を通過することになり、当該リング状鉄心部３の外周面及びローラ本体１１の内周面との間に形成される空間は、円筒状鉄心部１に軸方向に形成される空間に比べて、熱膨張量の差による変化が小さく、磁気抵抗の変化を抑えることができる。 According to the iron core 100 for an induction heating roller device according to the present embodiment configured as described above, the ring-shaped iron core portion 3 is provided on the outer peripheral surface of at least one end in the axial direction of the cylindrical iron core portion 1, so that the ring The magnetic core 3 forms a magnetic path that reaches the roller body 11, and the magnetic flux generated by the magnetic flux generation mechanism 10 is opposed to the outer peripheral surface of the ring-shaped iron core 3 and the roller main body 11 facing the outer peripheral surface. Pass through the plane. As a result, the magnetic flux generated by the magnetic flux generation mechanism 10 can be efficiently guided to the roller body 11, leakage flux from the axial end surface and the outer peripheral surface of the cylindrical iron core portion 1 can be reduced, and the induction heating roller The power factor in the device can be improved. Further, since the magnetic flux is passed through the outer peripheral surface of the ring-shaped iron core portion 3 facing in the radial direction and the opposing surface of the roller body 11 facing the outer peripheral surface, the difference in the thermal expansion amount hardly occurs. The gap between the surfaces can be made as small as possible. Further, the magnetic flux generated by the magnetic flux generation mechanism 10 mainly passes through the outer peripheral surface of the ring-shaped iron core portion 3 and the inner peripheral surface of the roller body 11 facing the outer peripheral surface of the ring-shaped iron core portion 3. The space formed between the outer peripheral surface of the iron core portion 3 and the inner peripheral surface of the roller body 11 is changed due to a difference in thermal expansion compared to the space formed in the cylindrical iron core portion 1 in the axial direction. It is small and the change in magnetoresistance can be suppressed.
また、リング状鉄心部３を製造する過程においては、湾曲部４１及び内側屈曲部４２により形成される凹部に、別の鉄心鋼板４の湾曲部４１及び内側屈曲部４２により形成される凸部を嵌めるように積層すれば良く積層作業を容易にすることができる。また、内側屈曲部４２が形成されていることにより、鉄心鋼板４の幅方向の向きを判断し易いことからも積層作業を容易にすることができる。さらに、積層した後のリング状鉄心部３においては、内側屈曲部４２が係合し合うことにより、鉄心鋼板４が径方向に抜脱してしまうことを防止することができる。 Further, in the process of manufacturing the ring-shaped iron core portion 3, the convex portion formed by the curved portion 41 and the inner bent portion 42 of another iron core steel plate 4 is added to the concave portion formed by the curved portion 41 and the inner bent portion 42. Lamination work can be facilitated by stacking so as to fit. Moreover, since the inner side bending part 42 is formed, since the direction of the width direction of the iron core steel plate 4 is easy to judge, lamination | stacking operation | work can be made easy. Furthermore, in the ring-shaped iron core portion 3 after being laminated, the inner bent portions 42 can be engaged with each other, thereby preventing the iron core steel plate 4 from being pulled out in the radial direction.
さらに、円筒状鉄心部１を構成する鉄心鋼板２が、第１の湾曲部２１及び第２の湾曲部２２の間に第１の屈曲部２４及び第２の屈曲部２５を介して中間連結部２３を有する構成であるため、鉄心鋼板２の中央部に屈曲部２４、２５を形成することができ、鉄心鋼板２のフォーミング加工を容易にすることができる。 Further, the iron core steel plate 2 constituting the cylindrical iron core portion 1 is connected to the intermediate connecting portion via the first bent portion 24 and the second bent portion 25 between the first bent portion 21 and the second bent portion 22. Therefore, the bent portions 24 and 25 can be formed in the central portion of the iron core steel plate 2, and the forming process of the iron core steel plate 2 can be facilitated.
また、円筒状鉄心部１を製造する過程においては、各鉄心鋼板２の第１の屈曲部２４同士及び第２の屈曲部２５同士を係合させるように重ね合わせれば良いので、円筒状鉄心部１の製造作業を簡単にすることができる。ここで、各鉄心鋼板２それぞれが幅方向に凹凸形状を有することから、各鉄心鋼板２の幅方向の位置決めを容易にすることができる。さらに、それら屈曲部２４、２５同士が係合することにより、鉄心鋼板２が径方向に抜脱してしまうことを防止することができる。 Further, in the process of manufacturing the cylindrical iron core portion 1, the first bent portions 24 and the second bent portions 25 of each iron core steel plate 2 may be overlapped so as to be engaged with each other. 1 manufacturing work can be simplified. Here, since each iron core steel plate 2 has an uneven shape in the width direction, positioning of each iron core steel plate 2 in the width direction can be facilitated. Furthermore, it is possible to prevent the core steel sheet 2 from being pulled out in the radial direction by engaging the bent portions 24 and 25 with each other.
その上、鉄心鋼板２が、第１の屈曲部２４及び第２の屈曲部２５を介して中間連結部２３を有しているので、各鉄心鋼板２の剛性を大きくすることができ、その鉄心鋼板２を複数用いて構成された円筒状鉄心部１の剛性を大きくすることができる。 In addition, since the iron core steel plate 2 has the intermediate connecting portion 23 via the first bent portion 24 and the second bent portion 25, the rigidity of each iron core steel plate 2 can be increased. The rigidity of the cylindrical core part 1 constituted by using a plurality of steel plates 2 can be increased.
なお、本発明は前記実施形態に限られるものではない。 The present invention is not limited to the above embodiment.
例えば、前記実施形態では、リング状鉄心部３は、円環状をなすものであったが、図９に示すように、一部切り欠かれた形状をなす部分円環状をなすものであっても良い。この場合、リング状鉄心部３の一部切り欠かれた部分により形成される間隙が、誘導コイル１２を外部に延出するための延出開口部３１となる。この延出開口部３１は、図９のように１つに限られず、周方向に２箇所以上設けても良い。 For example, in the above-described embodiment, the ring-shaped iron core portion 3 has an annular shape. However, as shown in FIG. 9, the ring-shaped iron core portion 3 may have a partially annular shape having a partially cut shape. good. In this case, a gap formed by a part of the ring-shaped iron core portion 3 that is notched becomes an extended opening 31 for extending the induction coil 12 to the outside. The extension openings 31 are not limited to one as shown in FIG. 9 and may be provided at two or more locations in the circumferential direction.
また、リング状鉄心部３に延出開口部３１を設ける他、円筒状鉄心部１に延出開口部を設ける構成としても良い。具体的には、円筒状鉄心部１の円周方向の一部に鉄心鋼板２を設けない空隙部を形成し、当該空隙部により延出開口部を形成しても良い。その他、円筒状鉄心部１の円周方向の一部の鉄心鋼板２の軸方向長さをその他の鉄心鋼板２よりも短く構成することによって、円筒状鉄心部１の軸方向における端部の一部に鉄心鋼板２が無い空隙部を形成して、当該空隙部により延出開口部を形成しても良い。 Further, in addition to providing the extended opening 31 in the ring-shaped iron core part 3, the cylindrical iron core part 1 may be provided with an extended opening. Specifically, a void portion in which the iron core steel plate 2 is not provided may be formed in a part of the cylindrical iron core portion 1 in the circumferential direction, and the extended opening portion may be formed by the void portion. In addition, by configuring the axial length of a part of the iron core steel plate 2 in the circumferential direction of the cylindrical iron core portion 1 to be shorter than that of the other iron core steel plates 2, one end portion in the axial direction of the cylindrical iron core portion 1 can be obtained. A void portion without the iron core steel plate 2 may be formed in the portion, and the extended opening may be formed by the void portion.
前記実施形態の鉄心鋼板２の構成として、図１０及び図１１に示すように、第２の湾曲部２２の幅方向外側である幅方向内径側において、第２の湾曲部２２の湾曲方向側に屈曲した第３の屈曲部２７を介して、第２の湾曲部２２に連続して形成された折れ曲がり部２６を有するものであっても良い。 As shown in FIGS. 10 and 11, as the configuration of the iron core steel plate 2 of the embodiment, on the inner diameter side in the width direction that is the outer side in the width direction of the second bending portion 22, on the bending direction side of the second bending portion 22. You may have the bending part 26 formed continuously from the 2nd bending part 22 via the 3rd bending part 27 bent.
折れ曲がり部２６は、第２の湾曲部２２の湾曲方向側に屈曲して形成された概略平板状をなすものである。また、第３の屈曲部２７は、第２の湾曲部２２の幅方向外側である幅方向内径側に対する折れ曲がり部２６の屈曲角度θ３が、例えば３０度となるように形成されている。なお、鉄心鋼板２を一方向からプレス加工により成形することを考えると、屈曲角度θ１、θ２に加えて屈曲角度θ３も、鋭角であることが望ましい。 The bent portion 26 has a substantially flat plate shape formed by bending toward the bending direction side of the second bending portion 22. Further, the third bent portion 27 is formed so that the bent angle θ 3 of the bent portion 26 with respect to the inner diameter side in the width direction which is the outer side in the width direction of the second curved portion 22 is, for example, 30 degrees. In consideration of forming the iron core steel plate 2 by pressing from one direction, it is desirable that the bending angle θ 3 is also an acute angle in addition to the bending angles θ 1 and θ 2 .
このように第３の屈曲部２７を介して折れ曲がり部２６を形成することにより、鉄心鋼板２の剛性を大きくするとともに、各鉄心鋼板２を積み重ねる作業を容易にするだけでなく、鉄心鋼板２が径方向に抜脱してしまうことを一層好適に防止することができる。 By forming the bent portion 26 through the third bent portion 27 in this way, not only the rigidity of the iron core steel plate 2 is increased, but also the work of stacking the iron core steel plates 2 is facilitated, It is possible to more suitably prevent the detachment in the radial direction.
また、図１２に示すように、円筒状鉄心部１を構成する鉄心鋼板２の形状が、リング状鉄心部３を構成する鉄心鋼板４の形状と同様に、幅方向断面において湾曲形状をなす湾曲部と、当該湾曲部の幅方向内径側端部において前記湾曲部の湾曲方向に屈曲して形成された内側屈曲部とを有するものであっても良い。 Further, as shown in FIG. 12, the shape of the iron core steel plate 2 constituting the cylindrical core portion 1 is curved so as to form a curved shape in the cross section in the width direction, similarly to the shape of the iron core steel plate 4 constituting the ring-shaped iron core portion 3. And an inner bent portion formed by bending in the bending direction of the bending portion at the inner diameter side end of the bending portion.
また、前記実施形態では、円筒状鉄心部１の軸方向における両端部にリング状鉄心部３を設けた場合について説明したが、例えば片持ち型の誘導発熱ローラ装置等においては、円筒状鉄心部１の軸方向における一方の端部（固定側端部）にリング状鉄心部３を設けたものであっても良い。 In the above embodiment, the case where the ring-shaped core part 3 is provided at both ends in the axial direction of the cylindrical core part 1 has been described. For example, in a cantilever induction heating roller device, the cylindrical core part is provided. A ring-shaped iron core portion 3 may be provided at one end portion (fixed side end portion) in the axial direction of 1.
その他、本発明は前記実施形態に限られず、その趣旨を逸脱しない範囲で種々の変形が可能であるのは言うまでもない。 In addition, it goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
１００・・・誘導発熱ローラ装置用鉄心
１０ ・・・磁束発生機構
１１ ・・・ローラ本体
１２ ・・・誘導コイル
１ ・・・円筒状鉄心
２ ・・・鉄心鋼板
２１ ・・・第１の湾曲部
２２ ・・・第２の湾曲部
２３ ・・・中間連結部
２４ ・・・第１の屈曲部
２５ ・・・第２の屈曲部
２６ ・・・折れ曲がり部
２７ ・・・第３の屈曲部
３ ・・・リング状鉄心部
３１ ・・・延出開口部
４ ・・・鉄心鋼板
４１ ・・・湾曲部
４２ ・・・内側屈曲部
DESCRIPTION OF SYMBOLS 100 ... Iron core 10 for induction heating roller apparatuses ... Magnetic flux generation mechanism 11 ... Roller main body 12 ... Induction coil 1 ... Cylindrical iron core 2 ... Iron core steel plate 21 ... 1st curve Part 22 ・ ・ ・ Second bending part 23 ・ ・ ・ Intermediate connection part 24 ・ ・ ・ First bending part 25 ・ ・ ・ Second bending part 26 ・ ・ ・ Bending part 27 ・ ・ ・ Third bending part 3 ... Ring-shaped iron core part 31 ... Extension opening part 4 ... Iron core steel plate 41 ... Bending part 42 ... Inner bending part
Claims (7)
幅方向断面において湾曲形状をなす湾曲部を有する長尺状をなす複数の鉄心鋼板を円筒状に積み重ねることにより形成された円筒状鉄心部と、
前記円筒状鉄心部の軸方向における少なくとも一方の端部外周面に設けられており、幅方向断面において湾曲形状をなす湾曲部を有する短尺状をなす複数の鉄心鋼板を円筒状に積み重ねることにより形成されたリング状鉄心部とを有する誘導発熱ローラ装置用鉄心。 A magnetic flux generating mechanism arranged along the axial direction of the roller body inside the roller body, and an iron core for an induction heating roller device around which an induction coil is wound,
A cylindrical iron core portion formed by stacking a plurality of elongated steel core steel plates having a curved shape having a curved shape in a cross section in the width direction, and
Formed by stacking a plurality of short steel sheets in a cylindrical shape having a curved portion that is curved in the cross section in the width direction, provided on the outer peripheral surface of at least one end in the axial direction of the cylindrical core. An iron core for an induction heating roller device having a ring-shaped iron core portion.
幅方向一端側に設けられた湾曲形状をなす第１の湾曲部と、
幅方向他端側に設けられ、前記第１の湾曲部と同一方向に湾曲する湾曲形状をなす第２の湾曲部と、
前記第１の湾曲部の幅方向内径側において第１の湾曲部の湾曲方向側に屈曲した第１の屈曲部、及び前記第２の湾曲部の幅方向外径側において第２の湾曲部の湾曲方向とは反対側に屈曲した第２の屈曲部を介して、前記第１の湾曲部及び前記第２の湾曲部に連続して形成された中間連結部とを有する請求項１乃至３の何れかに記載の誘導発熱ローラ装置用鉄心。 The iron core steel plate constituting the cylindrical iron core portion is,
A first curved portion having a curved shape provided on one end side in the width direction;
A second bending portion provided on the other end in the width direction and having a bending shape that curves in the same direction as the first bending portion;
The first bending portion bent toward the bending direction side of the first bending portion on the inner diameter side in the width direction of the first bending portion, and the second bending portion on the outer diameter side in the width direction of the second bending portion. The intermediate connection portion formed continuously from the first bending portion and the second bending portion via a second bending portion bent to the opposite side to the bending direction. An iron core for an induction heating roller device according to any one of the above.
前記第２の湾曲部の幅方向内径側において第２の湾曲部の湾曲方向側に屈曲した第３の屈曲部を介して、前記第２の湾曲部に連続して形成された折れ曲がり部を有する請求項４又は５記載の誘導発熱ローラ装置用鉄心。 The iron core steel plate constituting the cylindrical iron core,
There is a bent portion formed continuously with the second bending portion via a third bending portion bent toward the bending direction side of the second bending portion on the inner diameter side in the width direction of the second bending portion. The iron core for induction heating roller devices according to claim 4 or 5.
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| KR20220109398A (en) | 2019-12-04 | 2022-08-04 | 소니 세미컨덕터 솔루션즈 가부시키가이샤 | Electronics |
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| JPH0355790A (en) * | 1989-07-24 | 1991-03-11 | Okano Valve Seizo Kk | High-frequency heating method and its device |
| JP2000311777A (en) * | 1999-04-28 | 2000-11-07 | Tokuden Co Ltd | Iron core for induction heating roller device |
| JP2011155079A (en) * | 2010-01-26 | 2011-08-11 | Tokuden Co Ltd | Endless core and core for stationary induction apparatus |
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| GB844967A (en) * | 1956-11-14 | 1960-08-17 | Bbc Brown Boveri & Cie | Method of producing the magnet core for electrical transformers and reactors |
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| JPH0355790A (en) * | 1989-07-24 | 1991-03-11 | Okano Valve Seizo Kk | High-frequency heating method and its device |
| JP2000311777A (en) * | 1999-04-28 | 2000-11-07 | Tokuden Co Ltd | Iron core for induction heating roller device |
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| KR20220109398A (en) | 2019-12-04 | 2022-08-04 | 소니 세미컨덕터 솔루션즈 가부시키가이샤 | Electronics |
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