JP4405527B2 - Arrangement structure of guide tip for high frequency induction heating coil - Google Patents

Arrangement structure of guide tip for high frequency induction heating coil Download PDF

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JP4405527B2
JP4405527B2 JP2007099369A JP2007099369A JP4405527B2 JP 4405527 B2 JP4405527 B2 JP 4405527B2 JP 2007099369 A JP2007099369 A JP 2007099369A JP 2007099369 A JP2007099369 A JP 2007099369A JP 4405527 B2 JP4405527 B2 JP 4405527B2
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frequency induction
induction heating
heating coil
high frequency
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JP2008255425A (en
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精一 沢津橋
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Denki Kogyo Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、クランクシャフトのジャーナル部又はピン部を半開放鞍型高周波誘導加熱コイルにより高周波誘導加を行うに際して、ジャーナル部又はピン部と半開放鞍型高周波誘導加熱コイルとの間に所定の隙間を確保すべく、ジャーナル部又はピン部の上側部及び左右両側部にそれぞれ当接配置される上方側及び左右両側の3個の高周波誘導加熱コイル用ガイドチップの配設構造に関する。   The present invention provides a predetermined gap between the journal or pin portion and the semi-open saddle type high frequency induction heating coil when the journal portion or pin portion of the crankshaft is subjected to high frequency induction by the half open saddle type high frequency induction heating coil. In order to ensure the above, the present invention relates to an arrangement structure of three high-frequency induction heating coil guide chips on the upper side and the left and right sides, which are in contact with the upper side and both the left and right sides of the journal part or the pin part, respectively.

図8に示すように、被加熱物であるクランクシャフト1は、中心軸であるジャーナル部2と、互いに隣り合うジャーナル部2の間に配置されるカウンタウエイト部3と、相対向するカウンタウエイト部3の間に設けられるピン部4等とからなり、これらのジャーナル部2やピン部4は高周波誘導加熱されて焼入処理される。この焼入方法としては、フラット焼入やフィレットR焼入等があるが、いずれにしても焼入硬化層がジャーナル部2やピン部4に正しく形成される必要がある。なお、ジャーナル部2やピン部4を高周波誘導加熱するための高周波誘導加熱装置としては、例えば、特開2002−226919号公報(特許文献1)の図1に示されるようなものが従来より採用されている。   As shown in FIG. 8, the crankshaft 1 that is an object to be heated includes a journal portion 2 that is a central axis, a counterweight portion 3 that is disposed between adjacent journal portions 2, and counterweight portions that face each other. The journal part 2 and the pin part 4 are subjected to high-frequency induction heating and quenching treatment. As this quenching method, there are flat quenching, fillet R quenching and the like, but in any case, the quench hardened layer needs to be correctly formed on the journal portion 2 and the pin portion 4. In addition, as a high frequency induction heating apparatus for high frequency induction heating of the journal part 2 and the pin part 4, what was conventionally shown by FIG. 1 of Unexamined-Japanese-Patent No. 2002-226919 (patent document 1) is employ | adopted conventionally. Has been.

特開2002−226919号公報に記載の高周波誘導加熱装置は、その図1に示すような装置構造となっているが、図9は、これと近似する半開放鞍型高周波誘導加熱コイル5を用いている高周波誘導加熱装置6を示す。   The high-frequency induction heating apparatus described in Japanese Patent Application Laid-Open No. 2002-226919 has an apparatus structure as shown in FIG. 1, but FIG. 9 uses a semi-open saddle type high-frequency induction heating coil 5 that approximates this. The high-frequency induction heating device 6 is shown.

この高周波誘導加熱装置6は、図9に示すように、装置本体側に連結されて互いに対向配置される一対の側板7と、側板7の下端側の開口部に配置されて側板7に支持される半開放鞍型高周波誘導加熱コイル5と、この半開放鞍型高周波誘導加熱コイル5に対応する所定位置(本例では、クランクシャフト1のジャーナル部2の中心線に対して上側部、並びに、ジャーナル部2の中心線に対して左右両側部の3箇所)に配置されて側板7に取付けられる高周波誘導加熱コイル用ガイドチップ8a、8b,8c等とからなり、半開放鞍型高周波誘導加熱コイル5には給電用リード導体9が連結され、クランクシャフト1のジャーナル部2を急速冷却するための冷却水供給手段10等が設けられている。なお、高周波誘導加熱コイル用ガイドチップ8a,8b,8cは、クランクシャフト1のジャーナル部2を半開放鞍型高周波誘導加熱コイル5により高周波誘導加を行うに際して、ジャーナル部2と半開放鞍型高周波誘導加熱コイル5との間に所定の隙間を確保するための部材であり、これらのガイドチップ8a,8b,8cを介して半開放鞍型高周波誘導加熱コイル5がクランクシャフト1の軸線(ジャーナル部2の中心線)を中心に回転されるジャーナル部2上に載置されるようになっている。
特開2002−226919号公報
As shown in FIG. 9, the high-frequency induction heating device 6 is supported by the side plate 7, which is disposed on a pair of side plates 7 connected to the device body side and arranged to face each other, and an opening on the lower end side of the side plate 7. A semi-open saddle type high frequency induction heating coil 5 and a predetermined position corresponding to the half open saddle type high frequency induction heating coil 5 (in this example, an upper part with respect to the center line of the journal part 2 of the crankshaft 1, and It is composed of high frequency induction heating coil guide tips 8a, 8b, 8c, etc., which are arranged on the left and right sides of the center of the journal part 2 and attached to the side plate 7, and are semi-open saddle type high frequency induction heating coils. A power supply lead conductor 9 is connected to 5, and a cooling water supply means 10 for rapidly cooling the journal portion 2 of the crankshaft 1 is provided. The high frequency induction heating coil guide tips 8a, 8b, and 8c are connected to the journal portion 2 and the half open saddle type high frequency when the journal portion 2 of the crankshaft 1 is subjected to high frequency induction by the half open saddle type high frequency induction heating coil 5. This is a member for securing a predetermined gap between the induction heating coil 5 and the semi-open saddle type high frequency induction heating coil 5 via the guide tips 8a, 8b, 8c. 2 is centered on the journal part 2 rotated about the center line.
JP 2002-226919 A

高周波誘導加熱装置6における3個の高周波誘導加熱コイル用ガイドチップ8a,8b,8cは全て、図9に示すように、側板7に固定されており、ジャーナル部2の径方向や幅方向に対して不動の状態で配置されている。   All three high frequency induction heating coil guide tips 8a, 8b, 8c in the high frequency induction heating device 6 are fixed to the side plate 7 as shown in FIG. It is arranged in a stationary state.

このような固定式の高周波誘導加熱コイル用ガイドチップ8a,8b,8cにあっては、図10に示す如く、ジャーナル部2の直径D1が3個の高周波誘導加熱コイル用ガイドチップ8a,8b,8cの先端部(頂点)をそれぞれ通る共通円12の直径D2よりも小さい場合(D1<D2)には、ジャーナル部2は高周波誘導加熱コイル用ガイドチップ8a,8b,8cの先端部で囲まれた領域内に入るが、この場合には図10に示すように3個の高周波誘導加熱コイル用ガイドチップ8a,8b,8cのうちの2つの高周波誘導加熱コイル用ガイドチップ8a,8bにジャーナル部2が当接すると、残りの高周波誘導加熱コイル用ガイドチップ8cとジャーナル部2の外周面との間に隙間δが生じる。また、これとは逆に、ジャーナル部2の直径D1が3個の高周波誘導加熱コイル用ガイドチップ8a,8b,8cの先端部をそれぞれ通る共通円12の直径D2よりも大きい場合(D1>D2)には、ジャーナル部2は高周波誘導加熱コイル用ガイドチップ8a,8b,8cの先端部で囲まれた共通円12の領域内に入らないため、通常はD1<D2となるように設定するようにしている。 Such fixed type high frequency induction heating coil guide tip 8a, 8b, In the 8c, as shown in FIG. 10, the diameter D 1 of the journal portion 2 are three high-frequency induction heating coil guide tip 8a, 8b to the distal end of the 8c it is smaller than the diameter D 2 of the common circle 12 passing respectively (vertex) (D 1 <D 2), the journal portion 2 is a high-frequency induction heating coil guide tip 8a, 8b, 8c of the tip In this case, as shown in FIG. 10, two high frequency induction heating coil guide chips 8a, 8b, 8c out of the three high frequency induction heating coil guide chips 8a, When the journal portion 2 comes into contact with 8b, a gap δ is generated between the remaining high frequency induction heating coil guide tip 8c and the outer peripheral surface of the journal portion 2. On the contrary, when the diameter D 1 of the journal portion 2 is larger than the diameter D 2 of the common circle 12 passing through the tip portions of the three high frequency induction heating coil guide tips 8a, 8b, 8c (D 1> the D 2), the journal portion 2 is a high-frequency induction heating coil guide tip 8a, 8b, since not within the area of the common circle 12 surrounded by 8c of the tip portion, usually the D 1 <D 2 It is set to be.

以上のように、ジャーナル部2と高周波誘導加熱コイル用ガイドチップ8cとの間に隙間δがあるため、ジャーナル部2は高周波誘導加熱コイル用ガイドチップ8a,8b,8cに対して中心位置決めされない状態(ジャーナル部2の中心が所定の中心位置に位置決めされない状態)で高周波誘導焼入が行われる場合が多い。この結果、図11に示すように、ジャーナル部2の外周面に形成される焼入硬化層Sの厚みが不均一となり、精密な焼入ができないという問題点がある。   As described above, since there is a gap δ between the journal portion 2 and the high frequency induction heating coil guide tip 8c, the journal portion 2 is not centered with respect to the high frequency induction heating coil guide tips 8a, 8b, 8c. In many cases, induction hardening is performed in a state where the center of the journal portion 2 is not positioned at a predetermined center position. As a result, as shown in FIG. 11, there is a problem that the thickness of the hardened hardened layer S formed on the outer peripheral surface of the journal portion 2 becomes non-uniform and precise hardening cannot be performed.

本発明は、上述の問題点を解決すべく発明されたものであり、その目的は、クランクシャフトのジャーナル部やピン部の中心の位置決めを正確に行うことができ、ジャーナル部やピン部を均一に高周波誘導加熱して焼入硬化層の均一化を図ることができると共に、比較的簡便、安価に実施できる高周波誘導加熱コイル用ガイドチップの配設構造を提供することにある。また、本発明は、ジャーナル部やピン部の中心位置決めのみでなく、幅方向の位置決めを行うことができ高周波誘導加熱コイル用ガイドチップの配設構造を提供することを目的とする。 The present invention has been invented to solve the above-described problems, and its purpose is to accurately position the center of the journal portion and pin portion of the crankshaft, and to make the journal portion and pin portion uniform. It is another object of the present invention to provide a guide chip arrangement for a high-frequency induction heating coil that can be made uniform by quenching and hardening by high-frequency induction heating. The present invention also aims to provide a journal portion or a pin portion centering not only, arrangement structure of the guide chip for high frequency induction heating coil that can be to position the width direction.

上述の目的を達成するために、本発明では、半開放鞍型高周波誘導加熱コイルを支持する側板にそれぞれ取付けられた3個の高周波誘導加熱コイル用ガイドチップであって、クランクシャフトのジャーナル部又はピン部を前記半開放鞍型高周波誘導加熱コイルにより高周波誘導加熱する際に、前記ジャーナル部又はピン部と前記半開放鞍型高周波誘導加熱コイルとの間に所定の隙間(0.5mm〜3.5mm程度)を確保すべく、前記ジャーナル部又はピン部の上側部及び左右両側部にそれぞれ当接配置される上方側及び左右両側の3個の高周波誘導加熱コイル用ガイドチップの配設構造において、前記上方側の高周波誘導加熱コイル用ガイドチップを前記側板に、前記ジャーナル部又はピン部の径方向に対して固定状態で取付けると共に、左右両側の高周波誘導加熱コイル用ガイドチップのうちの少なくとも一方を、前記側板に片持ち状態で弾性支持することにより、前記側板に前記ジャーナル部又はピン部の径方向に沿って変動可能に配設し、前記3個の高周波誘導加熱コイル用ガイドチップが前記ジャーナル部又はピン部に当接されていない自由状態の下では、前記左右両側の高周波誘導加熱コイル用ガイドチップの間の寸法を前記ジャーナル部又はピン部の外径寸法よりも小さくなるように設定している。
た、本発明では、前記3個の高周波誘導加熱コイル用ガイドチップのうち、少なくとも、前記側板に固定状態で取付けられる前記高周波誘導加熱コイル用ガイドチップを、前記ジャーナル部又はピン部の幅方向においてその幅寸法が可変であるように構成し、互いに隣り合う前記クランクシャフトのカウンタウエイト部の間に前記幅寸法が可変の高周波誘導加熱コイル用ガイドチップが挿入配置されない自由状態の下では、前記幅寸法が可変の高周波誘導加熱コイル用ガイドチップの幅寸法を前記ジャーナル部又はピン部の幅寸法よりも広く設定している。
In order to achieve the above-described object, the present invention provides three high frequency induction heating coil guide chips each attached to a side plate supporting a half-open saddle type high frequency induction heating coil, the journal portion of the crankshaft or When high frequency induction heating of the pin portion is performed by the semi-open saddle type high frequency induction heating coil, a predetermined gap (0.5 mm to 3. mm) is provided between the journal portion or the pin portion and the half open saddle type high frequency induction heating coil. In the arrangement structure of the three high-frequency induction heating coil guide chips on the upper side and the left and right sides, which are disposed in contact with the upper side and the left and right sides of the journal part or the pin part, respectively, the upper side of the high-frequency induction heating coil guide tip, the side plates, with mounting in a fixed state with respect to the radial direction of the journal portion or a pin portion At least one of the guide tip for the left and right sides of the high-frequency induction heating coil, by elastically supported in cantilever fashion to the side plate, disposed to be varied along the radial direction of the journal portion or a pin portion to the side plate In the free state where the three high frequency induction heating coil guide tips are not in contact with the journal portion or the pin portion, the dimension between the left and right high frequency induction heating coil guide tips is set to the journal. It is set to be smaller than the outer diameter dimension of the portion or the pin portion.
Also, in the present invention, among the three high-frequency induction heating coil guide tip, at least, the high-frequency induction heating coil guide tip attached in a fixed state on the side plate, the width direction of the journal portion or a pin portion In the free state where the guide chip for the high-frequency induction heating coil having a variable width dimension is not inserted between the counterweight portions of the crankshafts adjacent to each other, the width dimension is variable. The width dimension of the high-frequency induction heating coil guide chip whose width dimension is variable is set wider than the width dimension of the journal part or the pin part.

請求項1に記載の本発明は、上方側の高周波誘導加熱コイル用ガイドチップを側板に、前記ジャーナル部又はピン部の径方向に対して固定状態で取付けると共に、左右両側の高周波誘導加熱コイル用ガイドチップのうちの少なくとも一方を、前記側板に片持ち状態で弾性支持することにより、側板にジャーナル部又はピン部の径方向に沿って変動可能に配設し、3個の高周波誘導加熱コイル用ガイドチップがジャーナル部又はピン部に当接されていない自由状態の下では、左右両側の高周波誘導加熱コイル用ガイドチップの間の寸法をジャーナル部又はピン部の外径寸法よりも小さくなるように設定したものであるから、左右両側の高周波誘導加熱コイル用ガイドチップのうちの少なくともその1個がジャーナル部又はピン部の径方向に変動可能(可変)に形成されているため、ジャーナル部又はピン部を3個の高周波誘導加熱コイル用ガイドチップの全てに当接させることができ、これにより、固定側の高周波誘導加熱コイル用ガイドチップの位置を正しくセットすることによりジャーナル部又はピン部を正しく中心位置決めすることができる。このため、ジャーナル部又はピン部の外周面を均一に高周波誘導加熱することができ、ひいてはジャーナル部又はピン部の外周面に均一な厚さ(深さ)の焼入硬化層を形成することができる。勿論、左右両側の高周波誘導加熱コイル用ガイドチップの両方を変動可能な構造(可変構造)にしても、ジャーナル部又はピン部の中心の位置決めを行うことは可能である。また、被加熱部であるジャーナル部又はピン部の直径に多少(±1.5mm程度)のバラツキがあっても、3個の高周波誘導加熱コイル用ガイドチップの先端部によって囲まれた領域内に全てのジャーナル部又はピン部をセットすることができる。 The present invention as described in claim 1 , wherein the guide chip for the high frequency induction heating coil on the upper side is attached to the side plate in a fixed state with respect to the radial direction of the journal part or the pin part, Three high frequency induction heating coils are arranged on the side plate so as to be variable along the radial direction of the journal portion or the pin portion by elastically supporting at least one of the guide tips on the side plate in a cantilever state. Under the free state where the guide tip for the arm is not in contact with the journal portion or the pin portion, the dimension between the guide tips for the high frequency induction heating coil on both the left and right sides is made smaller than the outer diameter size of the journal portion or the pin portion. Therefore, at least one of the high-frequency induction heating coil guide tips on both the left and right sides is changed in the radial direction of the journal part or the pin part. Since it is possible (variable), the journal part or the pin part can be brought into contact with all of the three high frequency induction heating coil guide chips, whereby the fixed side high frequency induction heating coil guide chip By correctly setting the position of the journal portion or the pin portion, it is possible to correctly position the center. For this reason, the outer peripheral surface of the journal portion or the pin portion can be uniformly induction-heated, and as a result, a hardened and hardened layer having a uniform thickness (depth) can be formed on the outer peripheral surface of the journal portion or the pin portion. it can. Of course, it is possible to position the center of the journal portion or the pin portion even if both the left and right high-frequency induction heating coil guide tips have a variable structure (variable structure). Also, even if there is some variation (about ± 1.5mm) in the diameter of the journal part or pin part that is the heated part, it is within the region surrounded by the tip parts of the three high frequency induction heating coil guide tips. All journal parts or pin parts can be set.

また、請求項に記載の本発明は、変動可能に配設される高周波誘導加熱コイル用ガイドチップを、側板に片持ち状態で弾性支持(片持ちバネ支持)するようにしているので、この高周波誘導加熱コイル用ガイドチップを、比較的簡便に、かつコンパクトに配設することができる。 Further, in the present invention as set forth in claim 1, the high-frequency induction heating coil guide tip is disposed can vary, since so as to elastically support a cantilever state to the side plate (cantilever spring support), This high frequency induction heating coil guide tip can be disposed relatively easily and compactly.

また、請求項に記載の本発明は、3個の高周波誘導加熱コイル用ガイドチップのうち、少なくとも、側板に固定状態で取付けられる高周波誘導加熱コイル用ガイドチップを、ジャーナル部又はピン部の幅方向においてその幅寸法が可変であるように構成し、互いに隣り合うクランクシャフトのカウンタウエイト部の間に幅寸法が可変の高周波誘導加熱コイル用ガイドチップが挿入配置されない自由状態の下では、幅寸法が可変の高周波誘導加熱コイル用ガイドチップの幅寸法をジャーナル部又はピン部の幅寸法よりも広く設定したものであるから、被加熱部であるジャーナル部又はピン部について中心位置決めに加えて幅方向についても正しい位置決めができ、全体として安定した所望の焼入硬化層を形成することができる。 According to the second aspect of the present invention, among the three high-frequency induction heating coil guide tips, at least the high-frequency induction heating coil guide tips attached to the side plates are fixed to the width of the journal portion or the pin portion. In the free state where the width dimension is variable in the direction, and the guide chip for the high frequency induction heating coil whose width dimension is variable is not inserted between the counterweight portions of the crankshafts adjacent to each other, the width dimension Since the width dimension of the variable high frequency induction heating coil guide chip is set to be wider than the width dimension of the journal part or the pin part, the journal part or the pin part which is the heated part has a width direction in addition to the center positioning. In addition, correct positioning can be performed, and the desired hardened and hardened layer can be formed as a whole.

以下、本発明の実施形態に係る高周波誘導加熱コイル用ガイドチップの配設構造について図1〜図7を参照して説明する。なお、図1〜図7において、図8〜図11と同様の部分には同一の符号を付して重複する説明を省略する。   Hereinafter, an arrangement structure of a guide chip for a high frequency induction heating coil according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7, the same parts as those in FIGS. 8 to 11 are denoted by the same reference numerals, and redundant description is omitted.

図1は、本発明の第1実施形態に係る高周波誘導加熱コイル用ガイドチップの配設構造を備えた高周波誘導加熱装置20を示すものであって、この高周波誘導加熱装置20は、クランクシャフト1のジャーナル部2を高周波誘導加熱するものである。図1に示すように、高周波誘導加熱装置20は、トランス(図示せず)側にそれぞれ連結されて互いに対向配置される一対の側板7と、これらの側板7の下縁側の開口部に配設されて側板7に支持された半開放鞍型高周波誘導加熱コイル5と、図外の電源から高周電力を半開放鞍型高周波誘導加熱コイル5に供給する給電用リード導体9と、半開放鞍型高周波誘導加熱コイル5に対応して側板7の所定位置に取付けられる3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21c等を具備している。さらに、高周波誘導加熱装置20には、半開放鞍型高周波誘導加熱コイル5にて高周波誘導加熱されたジャーナル部2に焼入処理のために冷却水を噴射する冷却水供給手段10が付設されて高周波誘導焼入装置を構成している。なお、図2は、本実施形態の主要要素である3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cの構造を示すための側板7の正面図である。   FIG. 1 shows a high-frequency induction heating device 20 having a structure for arranging a guide chip for a high-frequency induction heating coil according to a first embodiment of the present invention. The journal part 2 is heated by high frequency induction. As shown in FIG. 1, the high-frequency induction heating device 20 is disposed in a pair of side plates 7 that are respectively connected to a transformer (not shown) side and arranged to face each other, and an opening on the lower edge side of these side plates 7. A semi-open saddle type high frequency induction heating coil 5 supported by the side plate 7, a feed lead conductor 9 for supplying high circumferential power to a half open saddle type high frequency induction heating coil 5 from a power source not shown, Three high frequency induction heating coil guide chips 21a, 21b, 21c, etc., which are attached to predetermined positions of the side plate 7 corresponding to the mold high frequency induction heating coil 5, are provided. Further, the high-frequency induction heating device 20 is provided with a cooling water supply means 10 for injecting cooling water for quenching treatment to the journal portion 2 that has been induction-heated by the semi-open saddle type high-frequency induction heating coil 5. It constitutes an induction hardening apparatus. FIG. 2 is a front view of the side plate 7 showing the structure of the three high frequency induction heating coil guide tips 21a, 21b, and 21c that are the main elements of the present embodiment.

半開放鞍型高周波誘導加熱コイル5を支持する側板7にそれぞれ取付けられた3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cは、クランクシャフト1のジャーナル部2を半開放鞍型高周波誘導加熱コイル5により高周波誘導加熱する際に、ジャーナル部2と半開放鞍型高周波誘導加熱コイル5との間に所定の隙間(0.5mm〜3.5mm程度)を確保すべく、図外の回転駆動機構によりジャーナル部2の中心線を中心に回転駆動されるジャーナル部2の上側部及び左右両側部にそれぞれ当接配置されるものである。具体的には、図1及び図2に示すように、3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cのうちの1個のガイドチップ21aは、クランクシャフト1のジャーナル部2の中心線に対して上側部に配置されると共に、その他の2個の高周波誘導加熱コイル用ガイドチップ21b,21cは、ジャーナル部2の中心線に対して左右両側部に配置されるようになっている。   Three high frequency induction heating coil guide tips 21a, 21b, and 21c attached to the side plates 7 supporting the half open saddle type high frequency induction heating coil 5, respectively, allow the journal part 2 of the crankshaft 1 to be half open open type high frequency induction. When high-frequency induction heating is performed by the heating coil 5, rotation outside the figure is performed to ensure a predetermined gap (about 0.5 mm to 3.5 mm) between the journal portion 2 and the half-open saddle type high-frequency induction heating coil 5. The drive mechanism is disposed in contact with the upper and left and right side portions of the journal portion 2 that is rotationally driven around the center line of the journal portion 2. Specifically, as shown in FIGS. 1 and 2, one guide tip 21 a out of the three high-frequency induction heating coil guide tips 21 a, 21 b, 21 c is the center of the journal portion 2 of the crankshaft 1. The other two high frequency induction heating coil guide tips 21b and 21c are arranged on the left and right sides with respect to the center line of the journal portion 2 as well as being arranged on the upper side with respect to the line. .

本実施形態では、図1及び図2において上方側と左方側の高周波誘導加熱コイル用ガイドチップ21a,21bはジャーナル部2の径方向に対しては固定状態で側板7に取付けられるものであるが、幅寸法については可変のものからなる。なお、幅寸法に対してもジャーナル部2の構造や精度によっては高周波誘導加熱コイル用ガイドチップ21a,21bの幅寸法は固定であってもよい。一方、この幅方向の可変構造については後に図6を参照して簡単に説明する。   In this embodiment, the upper and left high frequency induction heating coil guide tips 21a, 21b in FIGS. 1 and 2 are attached to the side plate 7 in a fixed state in the radial direction of the journal portion 2. However, the width dimension is variable. The width dimension of the guide tips 21a and 21b for the high frequency induction heating coil may be fixed depending on the structure and accuracy of the journal portion 2 with respect to the width dimension. On the other hand, the variable structure in the width direction will be briefly described later with reference to FIG.

また、上方側と左方側の高周波誘導加熱コイル用ガイドチップ21a,21b以外のガイドチップ、すなわち、図1及び図2において右方側の高周波誘導加熱コイル用ガイドチップ21cは、ジャーナル部2の径方向に沿ってジャーナル部2に対して変動可能(可変)な状態で側板7に取付けられている。この可変式の高周波誘導加熱コイル用ガイドチップ21cは、図3(a),(b)に示すように、ガイドチップ本体22と、このガイドチップ本体22の基端側に一体的に連結されるバネ機能を有する可撓板23と、この可撓23の上端側に設けられた取付部24とを具備している。上述のガイドチップ本体22は、ギャップ25を介して平行に配設される板体26,26と、ギャップ25内に収納されているチップ27,27及びチップ固定板28と、これらを固定するビス29,29等とから構成される。また、板体26,26は、図3(a)に示すように可撓板23に連結されている。そして、ガイドチップ本体22は、図1及び図2に示すように、側板7とこの側板の下部に配設された補助側板30との間にこれらの部材との間に間隔をもって配置され、可撓板23の上部の取付部24が、一対の側板7の間に架設された架設部材(図示せず)にビス31により取付けられるようになっている。なお、図3において、32は上述のビス31のねじ部が挿入されるねじ部挿通孔である。以上の構成により、変動可能に配設される高周波誘導加熱コイル用ガイドチップ21cは、側板7に片持ち状態で弾性支持(片持ちバネ支持)されており、ガイドチップ本体22は、可撓板23の弾性により径方向に対して変動可能になっている。 The guide chips other than the upper and left high frequency induction heating coil guide chips 21a and 21b, that is, the right high frequency induction heating coil guide chip 21c in FIGS. It is attached to the side plate 7 so as to be variable (variable) with respect to the journal portion 2 along the radial direction. As shown in FIGS. 3A and 3B, the variable high-frequency induction heating coil guide tip 21 c is integrally connected to the guide tip body 22 and the proximal end side of the guide chip body 22. A flexible plate 23 having a spring function and a mounting portion 24 provided on the upper end side of the flexible plate 23 are provided. The above-described guide chip body 22 includes plate bodies 26 and 26 arranged in parallel via a gap 25, chips 27 and 27 and a chip fixing plate 28 housed in the gap 25, and screws for fixing them. 29, 29, etc. Further, the plate bodies 26 are connected to the flexible plate 23 as shown in FIG. As shown in FIGS. 1 and 2, the guide chip body 22 is disposed between the side plate 7 and the auxiliary side plate 30 disposed below the side plate with a space between them. A mounting portion 24 at the top of the flexible plate 23 is attached to a construction member (not shown) constructed between the pair of side plates 7 by screws 31. In FIG. 3, reference numeral 32 denotes a screw portion insertion hole into which the screw portion of the screw 31 is inserted. With the above configuration, the guide chip 21c for the high-frequency induction heating coil, which is variably arranged, is elastically supported (cantilevered spring support) in a cantilever state on the side plate 7, and the guide chip body 22 is a flexible plate. It is possible to vary the radial direction by the elasticity of 23.

なお、3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cがジャーナル部2に当接されていない自由状態の下では、すなわち、可変式の高周波誘導加熱コイル用ガイドチップ21cが変動を生じない自由状態のときには、図4に示すように、左右両側の高周波誘導加熱コイル用ガイドチップ21b,21cの先端部の間の寸法L1がジャーナル部2の外径寸法L2よりも小さくなるように設定されている(L1<L2)。 In addition, under the free state where the three high frequency induction heating coil guide tips 21a, 21b, and 21c are not in contact with the journal portion 2, that is, the variable high frequency induction heating coil guide tip 21c varies. In the case of no free state, as shown in FIG. 4, the dimension L 1 between the tip portions of the left and right high frequency induction heating coil guide tips 21b, 21c is made smaller than the outer diameter L 2 of the journal part 2. (L 1 <L 2 ).

一方、後述の如く、3個の高周波誘導加熱コイル用ガイドチップのうち、少なくとも、ジャーナル部2の径方向には変動しないように側板7に固定状態で取付けられる固定式の高周波誘導加熱コイル用ガイドチップ21a,21bは、ジャーナル部4の幅方向においてその幅寸法が可変であるように構成され、互いに隣り合うクランクシャフトのカウンタウエイト部3,3の間に、幅寸法が可変の高周波誘導加熱コイル用ガイドチップが挿入配置されない自由状態の下では、幅寸法が可変の高周波誘導加熱コイル用ガイドチップ21a,21bの幅寸法W1がジャーナル部2の幅寸法W2よりも広く設定されている(図6(c)に示す如く、W1>W2)。 On the other hand, as will be described later, among the three high frequency induction heating coil guide tips, at least a fixed high frequency induction heating coil guide fixedly attached to the side plate 7 so as not to vary in the radial direction of the journal portion 2. The chips 21a and 21b are configured such that the width dimension thereof is variable in the width direction of the journal part 4, and the width dimension is variable between the counterweight parts 3 and 3 of the crankshafts adjacent to each other. Under the free state in which the guide tip for insertion is not inserted and arranged, the width dimension W 1 of the guide chip 21a, 21b for the high frequency induction heating coil with variable width dimension is set wider than the width dimension W 2 of the journal portion 2 ( As shown in FIG. 6C, W 1 > W 2 ).

かくして、ガイドチップ本体22は、可撓板23の基端部を支点として図1及び図4において矢印Hで示す方向に沿って変位する。従って、可変式の高周波誘導加熱コイル用ガイドチップ21cは、ジャーナル部2の外周面に常に当接し、ジャーナル部2を、右方側の可変式の高周波誘導加熱コイル用ガイドチップ21cに対向する左方側の固定式の高周波誘導加熱コイル用ガイドチップ21bの側に押圧し、結果としてジャーナル部2は3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cの全て当接してこれらの高周波誘導加熱コイル用ガイドチップ21a,21b,21cによって保持されてジャーナル部2の中心の位置決め(中心位置決め)がなされる。 Thus, the guide chip body 22 is displaced along the direction indicated by the arrow H in FIGS. 1 and 4 with the base end portion of the flexible plate 23 as a fulcrum. Accordingly, the variable high frequency induction heating coil guide tip 21c is always in contact with the outer peripheral surface of the journal portion 2, and the journal portion 2 is left facing the variable high frequency induction heating coil guide tip 21c on the right side. pressed to the side of the square side of the fixed type high frequency induction heating coil guide tip 21b, resulting in a journal portion 2 is three high-frequency induction heating coil guide tip 21a, 21b, contact with these high frequency in all 21c The center of the journal portion 2 is positioned (center positioning) by being held by the induction heating coil guide tips 21a, 21b, and 21c.

次に、高周波誘導加熱装置20によりクランクシャフト1のジャーナル部2を高周波誘導加熱して焼入処理する際の動作について説明する。まず、3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cのうちの上方側の高周波誘導加熱コイル用ガイドチップ21aと左方側の高周波誘導加熱コイル用ガイドチップ21bとにジャーナル部2の外周面を当接させた状態でジャーナル部2の位置決めをすると、3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cがジャーナル部2の外周面に当接されていないとき(すなわち、高周波誘導加熱コイル5にてジャーナル部2を高周波誘導加熱していない状態のとき)には、既述の如く左右両側の高周波誘導加熱コイル用ガイドチップ21b,21cの間の寸法L1がジャーナル部2の外径寸法L2よりも小さくなるように設定されているので、自由状態にある右方側の可変式の高周波誘導加熱コイル用ガイドチップ21cがジャーナル部2の外周面に当接する。そして、この高周波誘導加熱コイル用ガイドチップ21cはジャーナル部2の径方向に弾性的に変動可能に側板7に片持ち状態で弾性支持されているので、この高周波誘導加熱コイル用ガイドチップ21cが可撓部23の弾性により図4において矢印H方向(すなわち、左右両側の高周波誘導加熱コイル用ガイドチップ21b,21cの間隔が広がる方向)に変動してジャーナル部2の外周面に圧接する。これに伴い、3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cの全てがジャーナル部2の外周面に当接された状態となる。これに伴い、ジャーナル部2の中心の位置決めができるため、この状態の下で半開放鞍型高周波誘導加熱コイル5に通電することによりジャーナル部2が均一に高周波誘導加熱され、次いで冷却水供給手段10から冷却水をジャーナル部2に噴射することによりジャーナル部2の外周面には図5に示すような均一な厚みの焼入硬化層Sが形成されることになる。 Next, the operation | movement at the time of carrying out the hardening process by the high frequency induction heating of the journal part 2 of the crankshaft 1 with the high frequency induction heating apparatus 20 is demonstrated. First, of the three high-frequency induction heating coil guide chips 21a, 21b, and 21c, the upper-side high-frequency induction heating coil guide chip 21a and the left-side high-frequency induction heating coil guide chip 21b When the journal portion 2 is positioned in a state where the outer peripheral surface is in contact, the three high-frequency induction heating coil guide tips 21a, 21b, 21c are not in contact with the outer peripheral surface of the journal portion 2 (that is, high frequency When the induction heating coil 5 is not in the high frequency induction heating of the journal portion 2), the dimension L 1 between the left and right high frequency induction heating coil guide chips 21 b and 21 c is the journal portion 2 as described above. Is set so as to be smaller than the outer diameter dimension L 2, so the variable frequency induction heating coil guide on the right side in the free state The tip 21 c comes into contact with the outer peripheral surface of the journal portion 2. The high frequency induction heating coil guide tip 21c is elastically supported in a cantilevered manner on the side plate 7 so as to be elastically variable in the radial direction of the journal portion 2, so that the high frequency induction heating coil guide tip 21c can be used. Due to the elasticity of the flexure 23, it fluctuates in the direction of arrow H in FIG. 4 (that is, the direction in which the distance between the guide chips 21b, 21c on the left and right sides widens) and presses against the outer peripheral surface of the journal portion 2. Accordingly, all of the three high-frequency induction heating coil guide tips 21 a, 21 b, and 21 c are in contact with the outer peripheral surface of the journal portion 2. Accordingly, since the center of the journal portion 2 can be positioned, the journal portion 2 is uniformly high-frequency induction heated by energizing the half-open saddle type high-frequency induction heating coil 5 in this state, and then the cooling water supply means By injecting the cooling water from 10 to the journal part 2, a quench hardening layer S having a uniform thickness as shown in FIG. 5 is formed on the outer peripheral surface of the journal part 2.

次に、図6(a),(b),(c)を参照して、幅方向に可変の上方側及び左方側の高周波誘導加熱コイル用ガイドチップ21a,21bの構造及び作用を簡単に説明する。まず、高周波誘導加熱コイル用ガイドチップ21a,21bは、側板7のコイル挿入用開口部に連なるように相対向する側板7,7にそれぞれ形成された各一対の平行状のスリット33,33により可撓(撓み変形可能)に側板7,7にそれぞれ設けられた相対向する一対の側板体7a,7a(図1,図2及び図6(b)参照)と、各々の側板体7a,7aの内面に密接して固定されると共にそれらの先端側が膨出して側板体7a,7aの外面よりはみ出して配置されるチップ34,34と、チップ34,34の内面にそれぞれ密接して固定されるチップ固定板35,35等とからなり、側板体7a,7aとチップ34,34とチップ固定板35,35の固定は、図6(a),(c)に示すように、左右両側箇所において各一対のビス36,36によりそれぞれ別々に行われるようになっている。そして、図6(a)に明示する如く、高周波誘導加熱コイル用ガイドチップ21a,21bは、自由状態(互いに隣り合うカウンタウエイト部3,3間に挿入配置されていない状態)においてチップ固定板35,35間には隙間37が形成されるように構成されている。従って、側板体7a,7aは、図6(a),(b)において符号Pで示す箇所を変動支点として隙間37を狭める方向に可撓状態(変動可能)となっている。   Next, referring to FIGS. 6A, 6B, and 6C, the structure and operation of the high-frequency induction heating coil guide tips 21a, 21b that are variable in the width direction are simplified. explain. First, the high frequency induction heating coil guide tips 21a and 21b are formed by a pair of parallel slits 33 and 33 formed in the side plates 7 and 7 facing each other so as to be continuous with the coil insertion opening of the side plate 7, respectively. A pair of opposing side plate bodies 7a and 7a (see FIGS. 1, 2 and 6B) provided on the side plates 7 and 7 for bending (deformable and deformable), and the side plate bodies 7a and 7a Chips 34 and 34 that are fixed in close contact with the inner surface and projecting from the outer surfaces of the side plate bodies 7a and 7a, and chips fixed in close contact with the inner surfaces of the chips 34 and 34, respectively. The side plate bodies 7a, 7a and the chips 34, 34 and the chip fixing plates 35, 35 are fixed to the left and right side portions as shown in FIGS. 6 (a) and 6 (c). A pair of screws 36, So that the respective performed separately by 6. Then, as clearly shown in FIG. 6A, the high frequency induction heating coil guide tips 21a and 21b are in a free state (in a state where they are not inserted and arranged between the counterweight portions 3 and 3 adjacent to each other). , 35 is formed so that a gap 37 is formed. Therefore, the side plate bodies 7a and 7a are in a flexible state (variable) in a direction in which the gap 37 is narrowed with the location indicated by the symbol P in FIGS. 6 (a) and 6 (b) as the fulcrum.

なお、図6(c)に示すように、例えば、ジャーナル部2を高周波誘導加熱(ひいては、焼入処理)すべき幅寸法がW2の場合、既述の如く高周波誘導加熱コイル用ガイドチップ21a,21bの自由状態における幅寸法W1はW1>W2であるが、高周波誘導加熱コイル用ガイドチップ21a,21bは幅方向に可撓であるため、ジャーナル部2の幅W2の内部に嵌り込み、この結果、高周波誘導加熱コイル用ガイドチップ21a,21bの幅方向の位置決めができる。 As shown in FIG. 6C, for example, when the width of the journal portion 2 to be subjected to high-frequency induction heating (and hence quenching) is W 2 , as described above, the guide chip 21a for the high-frequency induction heating coil is used. , 21b has a width W 1 in the free state of W 1 > W 2. However, since the high frequency induction heating coil guide tips 21a, 21b are flexible in the width direction, the width W 2 of the journal portion 2 is within the width W 2 . As a result, the high frequency induction heating coil guide tips 21a and 21b can be positioned in the width direction .

以上の説明において、可変式の高周波誘導加熱コイル用ガイドチップ21cは幅方向に対して可撓構造になっていないが、このものも幅方向に可撓(可変)に構成することは技術的に可能である。但し、ここではその詳細説明は省略する。 In the above description, the variable high-frequency induction heating coil guide tip 21c is not in the flexible structure with respect to the width direction, it is technically constituting this shall be flexible in the width direction (variable) Is possible. However, detailed description thereof is omitted here.

また、図7は、本発明の第2実施形態を示すものである。上述の第1実施形態では、ジャーナル部2の幅方向に可変の高周波誘導加熱コイル用ガイドチップ21a,21bをジャーナル部2の上方側と左方側とに配置し、ジャーナル部2の右方側にジャーナル部2の径方向に可変のガイドチップ21cを配置したが、本発明の第2実施形態においては、図7に示すように、左右両側の高周波誘導加熱コイル用ガイドチップ21b,21cを可変式のものとしている。この場合には、左右両側の高周波誘導加熱コイル用ガイドチップ21b,21cの可撓状態を均一に設定することにより、ジャーナル部2の中心の位置決めを正確に行うことができると共に、ジャーナル部2の外径にバラツキがあったとしてもジャーナル部2の中心の位置決めを確実に行うことができ、ジャーナル部2の均一な高周波誘導加熱を行うことができて均一な焼入硬化層S(図5参照)を形成することができる。   FIG. 7 shows a second embodiment of the present invention. In the first embodiment described above, the high frequency induction heating coil guide chips 21 a and 21 b that are variable in the width direction of the journal part 2 are arranged on the upper side and the left side of the journal part 2, and the right side of the journal part 2 is arranged. In the second embodiment of the present invention, as shown in FIG. 7, the guide chips 21b and 21c for the high-frequency induction heating coils on both the left and right sides are variable. It is assumed to be of the formula. In this case, the center of the journal part 2 can be accurately positioned by setting the flexible state of the guide chips 21b and 21c for the high-frequency induction heating coils on both the left and right sides. Even if there is a variation in the outer diameter, the center of the journal part 2 can be reliably positioned, and the high frequency induction heating of the journal part 2 can be performed, and a uniform hardened and hardened layer S (see FIG. 5). ) Can be formed.

以上、本発明の一実施形態について述べたが、本発明はこの実施形態に限定されるものではなく、本発明の技術的思想に基づいて各種の変形及び変更が可能である。例えば、高周波誘導加熱コイル用ガイドチップ21b,21cを弾性的に変動可能に側板7に配設するための配設構造は、既述の実施形態に限らず、各種の配設構造(取付構造)を採用することが可能である。また、既述の実施形態では、クランクシャフト1のジャーナル部2を高周波誘導加熱して焼入処理する場合について説明したが、クランクシャフト1のピン部4を高周波誘導加熱して焼入処理する場合にも本発明を適用し得る。   Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various modifications and changes can be made based on the technical idea of the present invention. For example, the arrangement structure for arranging the high-frequency induction heating coil guide tips 21b and 21c on the side plate 7 so as to be elastically variable is not limited to the above-described embodiment, but various arrangement structures (attachment structures). Can be adopted. In the above-described embodiment, the case where the journal portion 2 of the crankshaft 1 is induction-heated by high-frequency induction heating has been described. However, the case where the pin portion 4 of the crankshaft 1 is subjected to quenching treatment by high-frequency induction heating. The present invention can also be applied to.

本発明の一実施形態に係る高周波誘導加熱コイル用ガイドチップの配設構造を備えた高周波誘導加熱装置の要部を示す正面図である。It is a front view which shows the principal part of the high frequency induction heating apparatus provided with the arrangement | positioning structure of the guide chip for high frequency induction heating coils which concerns on one Embodiment of this invention. 高周波誘導加熱コイル用ガイドチップが取付けられる高周波誘導加熱装置の側板を示す正面図である。It is a front view which shows the side plate of the high frequency induction heating apparatus with which the guide chip for high frequency induction heating coils is attached. 本発明の一実施形態における高周波誘導加熱コイル用ガイドチップを示すものであって、図3(a)は高周波誘導加熱コイル用ガイドチップの斜視図、図3(b)は図3(a)におけるA−A線断面図である。FIG. 3A is a perspective view of a guide chip for a high frequency induction heating coil according to an embodiment of the present invention, FIG. 3A is a perspective view of the guide chip for a high frequency induction heating coil, and FIG. It is AA sectional view. 本発明の一実施形態における高周波誘導加熱コイル用ガイドチップによりジャーナル部の中心の位置決めを行っている状態を示す説明図である。It is explanatory drawing which shows the state which has positioned the center of a journal part with the guide chip for high frequency induction heating coils in one Embodiment of this invention. 本発明の一実施形態における高周波誘導加熱コイル用ガイドチップを用いてジャーナル部を高周波誘導加熱して焼入処理した場合にジャーナル部の外周面に形成される焼入硬化層を示す断面図である。It is sectional drawing which shows the hardening hardening layer formed in the outer peripheral surface of a journal part when the journal part is induction-heated by the high frequency induction heating using the guide chip for high frequency induction heating coils in one Embodiment of this invention. . 幅寸法が可変の(可撓性のある)高周波誘導加熱コイル用ガイドチップの構造を示すものであって、図6(a)は高周波誘導加熱コイル用ガイドチップの断面図、図6(b)は高周波誘導加熱コイル用ガイドチップの側面図、図6(c)は高周波誘導加熱コイル用ガイドチップを用いた場合のジャーナル部との係合状態を示す断面図である。FIG. 6A shows the structure of a guide chip for a high-frequency induction heating coil having a variable width dimension (flexible). FIG. 6A is a cross-sectional view of the guide chip for a high-frequency induction heating coil, and FIG. FIG. 6 is a side view of a guide tip for a high frequency induction heating coil, and FIG. 6C is a cross-sectional view showing an engaged state with a journal portion when the guide tip for a high frequency induction heating coil is used. 本発明の第2実施形態を示すものであって、左右両側の高周波誘導加熱コイル用ガイドチップを変動可能(可変)に構成した場合を示す図2と同様の正面図である。FIG. 9 shows a second embodiment of the present invention, and is a front view similar to FIG. 2 showing a case where the guide chips for high-frequency induction heating coils on both the left and right sides are configured to be variable (variable). クランクシャフトの側面図である。It is a side view of a crankshaft. 従来の高周波誘導加熱コイル用ガイドチップの配設構造を有する高周波誘導加熱装置の要部の正面図である。It is a front view of the principal part of the high frequency induction heating apparatus which has the arrangement structure of the conventional guide chip for high frequency induction heating coils. 従来の高周波誘導加熱コイル用ガイドチップの配設構造の場合に高周波誘導加熱時における問題点を説明するための説明図である。It is explanatory drawing for demonstrating the problem at the time of the high frequency induction heating in the case of the arrangement structure of the conventional guide tip for high frequency induction heating coils. 従来の高周波誘導加熱コイル用ガイドチップの配設構造を有する高周波誘導加熱装置を用いてジャーナル部を高周波誘導加熱して焼入処理した場合にジャーナル部の外周面に形成される焼入硬化層を示す断面図である。A quench hardened layer formed on the outer peripheral surface of the journal portion when the journal portion is subjected to high frequency induction heating and quenching treatment using a high frequency induction heating device having a conventional guide chip arrangement for a high frequency induction heating coil. It is sectional drawing shown.

符号の説明Explanation of symbols

1 クランクシャフト
2 ジャーナル部
3 カウンタウエイト部
4 ピン部
5 半開放鞍型高周波誘導加熱コイル
7 側板
7a 側板体
20 高周波誘導加熱装置
21a,21b,21c 高周波誘導加熱コイル用ガイドチップ
22 ガイドチップ本体
23 可撓板
33 スリット
37 隙間
DESCRIPTION OF SYMBOLS 1 Crankshaft 2 Journal part 3 Counterweight part 4 Pin part 5 Semi-open saddle type high frequency induction heating coil 7 Side plate 7a Side plate 20 High frequency induction heating device 21a, 21b, 21c Guide chip for high frequency induction heating coil 22 Guide chip body 23 Possible Flexible plate 33 Slit 37 Gap

Claims (2)

半開放鞍型高周波誘導加熱コイルを支持する側板にそれぞれ取付けられた3個の高周波誘導加熱コイル用ガイドチップであって、クランクシャフトのジャーナル部又はピン部を前記半開放鞍型高周波誘導加熱コイルにより高周波誘導加熱する際に、前記ジャーナル部又はピン部と前記半開放鞍型高周波誘導加熱コイルとの間に所定の隙間を確保すべく、前記ジャーナル部又はピン部の上側部及び左右両側部にそれぞれ当接配置される上方側及び左右両側の3個の高周波誘導加熱コイル用ガイドチップの配設構造において、
前記上方側の高周波誘導加熱コイル用ガイドチップを前記側板に、前記ジャーナル部又はピン部の径方向に対して固定状態で取付けると共に、左右両側の高周波誘導加熱コイル用ガイドチップのうちの少なくとも一方を、前記側板に片持ち状態で弾性支持することにより、前記側板に前記ジャーナル部又はピン部の径方向に沿って変動可能に配設し、前記3個の高周波誘導加熱コイル用ガイドチップが前記ジャーナル部又はピン部に当接されていない自由状態の下では、前記左右両側の高周波誘導加熱コイル用ガイドチップの間の寸法を前記ジャーナル部又はピン部の外径寸法よりも小さくなるように設定したことを特徴とする高周波誘導加熱コイル用ガイドチップの配設構造。
Three guide chips for high frequency induction heating coils each attached to a side plate supporting a half open saddle type high frequency induction heating coil, wherein the journal part or pin part of the crankshaft is formed by the half open saddle type high frequency induction heating coil. When performing high-frequency induction heating, in order to ensure a predetermined gap between the journal part or pin part and the half-open saddle type high-frequency induction heating coil, respectively on the upper side part and the left and right side parts of the journal part or pin part. In the arrangement structure of the three guide chips for the high frequency induction heating coil on the upper side and the left and right sides that are in contact with each other,
The upper side of the high-frequency induction heating coil guide tip, the side plates, with mounting in a fixed state with respect to the radial direction of the journal portion or a pin portion, at least one of the guide tip for the left and right sides of the high-frequency induction heating coil Is elastically supported on the side plate in a cantilevered state, and is arranged on the side plate so as to be variable along the radial direction of the journal portion or the pin portion, and the three high frequency induction heating coil guide chips are Under a free state where no contact is made with the journal part or the pin part, the dimension between the guide chips for the high-frequency induction heating coils on both the left and right sides is set to be smaller than the outer diameter dimension of the journal part or the pin part. An arrangement structure of guide tips for a high-frequency induction heating coil, characterized in that
前記3個の高周波誘導加熱コイル用ガイドチップのうち、少なくとも、前記側板に固定状態で取付けられる前記高周波誘導加熱コイル用ガイドチップを、前記ジャーナル部又はピン部の幅方向においてその幅寸法が可変であるように構成し、互いに隣り合う前記クランクシャフトのカウンタウエイト部の間に前記幅寸法が可変の高周波誘導加熱コイル用ガイドチップが挿入配置されない自由状態の下では、前記幅寸法が可変の高周波誘導加熱コイル用ガイドチップの幅寸法を前記ジャーナル部又はピン部の幅寸法よりも広く設定したことを特徴とする請求項1に記載の高周波誘導加熱コイル用ガイドチップの配設構造。 Of the three high-frequency induction heating coil guide tips, at least the high-frequency induction heating coil guide tips attached to the side plate in a fixed state are variable in the width direction of the journal portion or pin portion. In a free state where the guide chip for a high-frequency induction heating coil with a variable width is not inserted between the counterweight portions of the crankshafts adjacent to each other, the high-frequency induction with a variable width 2. The arrangement structure of a guide tip for a high frequency induction heating coil according to claim 1, wherein a width dimension of the guide tip for the heating coil is set wider than a width dimension of the journal portion or the pin portion.
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