JP4542217B2

JP4542217B2 - Metal plate with protrusions for mounting parts, manufacturing method thereof, and mounting structure using the same

Info

Publication number: JP4542217B2
Application number: JP31166699A
Authority: JP
Inventors: 博康高山
Original assignee: 株式会社サンコー
Priority date: 1999-11-01
Filing date: 1999-11-01
Publication date: 2010-09-08
Anticipated expiration: 2019-11-01
Also published as: JP2001129623A

Description

【０００１】
【発明の属する技術分野】
本発明は、部品取付用突起付き金属板及びその製造方法及びそれを用いた取付構造に関し、さらに詳細には、金属板の加工によって、回転部品又は摺動部品等の取付部品が取り付けられる軸状突起部が一体成形されていると共に、該軸状突起部に前記取付部品が取り付けられた際に成形されて抜け止め部となる延設部が前記軸状突起部の上に一体成形されている部品取付用突起付き金属板及びその製造方法及びそれを用いた取付構造に関する。例えば、メカ機構（ＯＡ機器、オーディオ機器、ＡＶ機器等々）におけるシャーシ等であって、回転部品の抜け止め付き回転軸、若しくは摺動部品の抜け止め付きガイド軸等が一体成形された部品取付用突起付き金属板及びその製造方法及びそれを用いた取付構造に関する。
【０００２】
【従来の技術】
従来から、精密機器の分野において、金属板からなるシャーシ等に、回転部品又は摺動部品等の取付部品を取り付けるために軸状の突起部を設けるには、金属板に別体に製造された軸部材を固定したものがある。例えば、シャーシ等に孔明けをし、その孔に、一端側に切削によってＥリング用の溝が形成された溝付き軸部材の他端側を挿入し、その他端側のカシメによって、軸部材を金属板に固定する。そして、その軸部材に取付部品を嵌めた後、その取付部品の抜け止めのため、軸部材の前記溝にＥリングを取り付けるという取付方法があった。また、一端側にツバが付いたツバ付きピンの軸状部に、取付部品を嵌めた後、そのツバ付きピンの他端側を金属板に設けた孔に挿入し、その他端側をカシメることによって抜け止めを行う取付方法があった。
【０００３】
また、別の取付方法としては、金属板に孔を明け、バーリング加工によって、回転部品又は摺動部品等の取付部品が取り付けられる軸状突起部を、その金属板に一体成形すると共に、その軸状突起部に前記取付部品が取り付けられた際に変形されて抜け止め部となる延設部を前記軸状突起部の上に一体成形することによって設けられる部品取付用突起付き金属板を用いた取付方法が提案されていた。
軸状突起部及び延設部を所定の立ち上げ寸法に成形するには、第１バーリング及び第２バーリングという２段階の加工によることも提案されていた。この部品取付用突起付き金属板に取付部品を取り付ける取付構造は、一種のハト目構造であり、取付部品を嵌めた後、延設部を折り曲げ又はカシメ等によって変形させることで、取付部品の抜け止めがなされている。
【０００４】
【発明が解決しようとする課題】
しかしながら、従来のＥリング用の溝付き軸部材やツバ付きピンをカシメによって固定して利用する方法では、回動部材或いは摺動部材の動作が良好な精度のよい取付構造を提供できるが、部品点数が多く、カシメ組立のための工数も多くなり、製造コストが高くなるという課題があった。
【０００５】
また、従来のバーリング加工によって軸状突起部及び延設部を金属板に一体成形する方法では、製造コストは低減できるが、特に抜け止め加工の工程において軸状突起部（回転部品に対応する回転軸、又は摺動部品に対応するガイド軸）が歪み易く、径寸法の精度が悪化することで、回転部材、摺動部品の動作が悪くなったり、スラストガタが大きくなり、メカ機構として不具合が生じ易いという課題があった。すなわち、バーリング加工によって成形された軸状突起部及び延設部は、単に立ち上げられた形状になっており、延設部を変形させる力が、軸状突起部の特にその突起先端を拡径する方向へ変形させる（広げる）ように作用し易い形態になっている。
【０００６】
また、バーリング加工による場合、孔を明けるために切口が形成されることになり、その切口から微細金属粉が発生し易い。さらに、抜け止めのために延設部を変形させる加工の工程においては、バーリングの先端部がさらに引き伸ばされることになることから、孔の切口であるバーリングの先端にはバリが形成されるなど、さらに微細金属粉が発生し易くなる。特に近年急速な進歩を遂げている記録メディア装置（例えば、ＣＤ、ＤＶＤ等）では、微細金属粉等の粒子のメディア上への落下が不具合の有力な要因であるため、メディアがさらに記憶容量を増大させ、メディア装置がさらに精密化する上で、微細金属粉の発生を防止することは、重大な課題になっている。
【０００７】
そこで、本発明の目的は、製造コストを低減できると共に、取付部品が好適に取り付けられるように軸状突起部の構造強度を向上させて寸法精度を維持可能に成形され、且つ、微細金属粉が発生することを防止できる部品取付用突起付き金属板及びその製造方法及びそれを用いた取付構造を提供することにある。
【０００８】
【課題を解決するための手段】
本発明は、上記目的を達成するために次の構成を備える。
すなわち、本発明にかかる部品取付用突起付き金属板は、金属板の加工によって、回転部品又は摺動部品等の取付部品が取り付けられる軸状突起部が一体成形されていると共に、該軸状突起部に前記取付部品が取り付けられた際に成形されて抜け止め部となる延設部が前記軸状突起部の上に一体成形されている部品取付用突起付き金属板において、前記軸状突起部が、該軸状突起部の突起先端側を閉塞した状態とする閉塞部を有する筒状に、プレス機による圧縮成形によって突起されて設けられていると共に、前記延設部が、前記閉塞部を有する前記軸状突起部から一体に続いた形態に、プレス機による圧縮成形によって突起されて設けられ、前記延設部は、前記軸状突起部と径方向に段が付く肩部が形成されるように該軸状突起部の径よりも小さく筒状に成形され、前記閉塞部は、前記軸状突起部の天井部で且つ前記延設部の底部となるように、前記肩部の内側に形成されていることを特徴とする。
【０００９】
これによれば、延設部が取付部品の抜け止めのために押し広げ成形されても、その力が伝達されにくく、軸状突起部が変形することを好適に防止でき、取付部品の取付精度を好適に維持できる。
【００１０】
また、本発明は、前記の部品取付用突起付き金属板を製造する部品取付用突起付き金属板の製造方法であって、前記軸状突起部の成形と、前記延設部の成形とが、プレス機による１工程の圧縮成形によってなされることを特徴とする部品取付用突起付き金属板の製造方法にもある。これによれば、製造効率を向上させることができる。
【００１１】
また、本発明は、前記の部品取付用突起付き金属板を製造する部品取付用突起付き金属板の製造方法であって、前記軸状突起部の成形と、前記延設部の成形とが、プレス機による２工程以上の圧縮成形によってなされることで、より好適に高さの大きな軸状突起部及び延設部を形成できる。
【００１２】
また、前記の部品取付用突起付き金属板に取付部品が取り付けられた部品取付用突起付き金属板を用いた取付構造であって、前記軸状突起部に前記取付部品が嵌められ、前記延設部が押し広げ成形によって、前記取付部品が部品取付用突起付き金属板に回転可能又は摺動可能に取り付けられていることを特徴とする部品取付用突起付き金属板を用いた取付構造にもある。これによれば、簡単な工程で安価に且つ精度よく取付部品を部品取付用突起付き金属板に取り付けることができる。また、この部品取付用突起付き金属板はバーリング加工によって成形されていないため、押し広げ成形によっても、微細金属粉が発生することを好適に防止できる。
【００１３】
【発明の実施の形態】
以下、本発明にかかる好適な実施の形態を添付図面と共に詳細に説明する。
図１は本発明にかかる部品取付用突起付き金属板の一実施例を示す断面図である。
本実施例の部品取付用突起付き金属板は、ＯＡ機器、オーデオ機器或いはＡＶ機器等々の精密製品のメカ機構におけるシャーシを構成するものであり、小さな軸径、例えば、数ｍｍから５ｍｍ程度に設けられた回転部品の抜け止め付き回転軸、若しくは摺動部品の抜け止め付きガイド軸等が一体成形されたものの一例である。
【００１４】
この部品取付用突起付き金属板は、基本構成として図１に明らかなように、金属板の加工によって、回転部品又は摺動部品等の取付部品が取り付けられる軸状突起部１２が一体成形されていると共に、その軸状突起部１２に取付部品２０が取り付けられた際に変形されて抜け止め部１６Ａ（図１０参照）となる延設部１６が軸状突起部１２の上に続いた形態に一体成形されている。
なお、部品取付用突起１１とは、軸状突起部１２と延設部１６とから構成され、金属板１０の面上から突出する部分のことを意味する。
【００１５】
そして、軸状突起部１２が、その軸状突起部１２の突起先端側を閉塞した状態とする閉塞部１４を有する筒状に、プレス機による圧縮成形によって突起されて設けられていると共に、延設部１６が、閉塞部１４を有する軸状突起部１２から一体に続いた形態に、プレス機による圧縮成形によって突起されて設けられている。
なお、上記の軸状突起部１２とは、回動を含む回転動作をする回転部品の回転軸、或いは摺動部品の動作を規制すると共に案内するガイド軸を含むもののことを意味する。また、本実施例の軸状突起部１２は、円筒形に形成されており、その直径によって規定されるものであるが、楕円又は長円等の他の形態に形成することも可能である。また、閉塞部１４は、筒体（パイプ）状に形成された軸状突起部１２の底部或いは天井部と表現できる部分であると共に、筒体（パイプ）状に形成された延設部１６の底部或いは天井部ともなっている部分である。
【００１６】
以上のように本実施例では、軸状突起部１２に閉塞部１４を有するため、延設部１６が取付部品の抜け止めのために押し広げ成形されても、軸状突起部１２が変形することを好適に防止でき、取付精度を好適に維持できる。すなわち、閉塞部１４が梁になって、軸状突起部１２が、歪みを発生しにくい構造強度の高い形状になっており、変形しにくいことから、軸状突起部１２の径方向の寸法及び金属板面に対する直角度を好適に維持できるのは勿論、高さ方向の寸法についても安定的に維持できる。
【００１７】
また、プレス機による圧縮成形によって軸状突起部１２及び延設部１６が形成されるため、従来のバーリング加工による場合のように微細金属粉が発生するという問題が生じない。これはバーリング加工の場合、金属板に孔を明け、その孔の内周縁を引き伸ばしつつ立ち上げるようにして、軸状突起部及び延設部を成形し、さらに、そのように成形された延設部を抜け止め部とすべく変形させるため、特に孔の切口であるバーリングの先端に引張力が大きくかかる。このため、その表面が粗くなって、バリとなったり、その粗くなった部分から微細金属粉が発生する。
これに対して本発明では、圧縮による成形のため、表面が粗くなることがなく、基本的に微細金属粉が発塵することがなく、その発塵による精密機器の故障或いは高密度の記憶媒体であるメディアの損傷を未然に防止できる。
【００１８】
また、本実施例では、延設部１６は、軸状突起部１２と径方向に段が付くようにその軸状突起部１２の径よりも小さく筒状に成形されている。このことで、延設部１６が取付部品の抜け止めのために押し広げ成形されても、軸状突起部１２が変形することを好適に防止でき、取付精度を好適に維持できる。
すなわち、延設部１６の変形される部分が、軸状突起部１２の先端の側に形成される肩部１２ａの内側に位置することになり、延設部１６を変形させる際の力が作用しにくい。このため、前述した閉塞部１４との効果と合わせて、軸状突起部１２は、径方向に限らず、スラスト方向である高さ方向についても変形しにくく、その寸法精度を維持できる。
【００１９】
また、軸状突起部１２に対して延設部１６の肉厚が薄く形成されている。このため、延設部１６が軸状突起部より変形し易く、これによっても、相対的に軸状延設部１２の形状を維持できる。
従って、この軸状突起部１２及び延設部１６を構成とする部品取付用突起１１によれば、取付部品２０の動作に悪影響を与えることがないように、取付部品２０を抜け止めした状態に好適に取り付けることができる。
【００２０】
また、図１に示すように、軸状突起部１２及び延設部１６を構成とする部品取付用突起１１を、金属板１０の一方面側から所定の高さに突起させるため、他方面側の広い範囲を凹部１５とするように、圧縮成形してある。本実施例では、凹部１５の直径の方が、軸状突起部１２の直径よりも大きくなるように成形されており、その肉厚が後述するダイ３０（図３、４、６〜９参照）の型内に押し込まれるようにして好適に成形される。
【００２１】
次に図２〜４に基づいて、図１に示した部品取付用突起付き金属板を製造する製造工程の一実施例について説明する。図２は図１の実施例の製造工程にかかる一実施例を示す工程図である。また、図３及び４は図１の実施例を製造する金型の一実施例及びその動作を説明する断面図である。
この実施例では、図２に示すように、平板状の金属板（図２（ａ））から、軸状突起部１２の成形と、延設部１６の成形とが、プレス機による１工程の圧縮成形によってなされる（図２（ｂ））。すなわち、図３に示すように、金属板１０を、プレス機の金型内であるダイ３０とポンチ４０との間の所定位置に供給する。そして、図４に示すように、ダイ３０とポンチ４０とを相対的に近接させ、金属板１０に対して圧縮応力がかかる圧縮成形を行う。
なお、ダイ３０の型内に延設部１６の内面を形成するように設けられたポンチ状の内型部３０ａ、及びポンチ４０は、部品取付用突起１１が成形された金属板を好適に脱型するように、入れ子式に型割方向に摺動可能に設けられている。
【００２２】
この方法によれば、一定の高さまでの軸状突起部１２及び延設部１６を構成とする部品取付用突起１１を、金属板１０に好適に一体成形できる。例えば、金属板１０の厚さと同一程度の高さの軸状突起部１２を有する部品取付用突起１１を、一般鋼材である冷間圧延鋼鈑から成る平板材から好適に成形することができた。
そして、この本実施例では、１工程の圧縮成形で部品取付用突起１１の成形がなされるため、製造効率を向上させることができる。また、材料としても、深絞り用の鋼材等の特別なものを要することなく、安価なものを用いることができ、結果として製造コストを低減できる。
【００２３】
次に図５〜９に基づいて、図１に示した部品取付用突起付き金属板を製造する製造工程の他の実施例について説明する。また、図５は図１の実施例にかかる他の製造工程を示す工程図である。また、図６〜９は図１の実施例を製造する金型の他の実施例及びその動作を説明する断面図である。
この実施例では、図５に示すように、平板状の金属板（図５（ａ））から、軸状突起部１２の成形と、延設部１６の成形とが、プレス機による２工程（図５（ｂ）、図５（ｃ））の圧縮成形によってなされる。
【００２４】
すなわち、先ず、図６に示すように、金属板１０を、プレス金型の第１のダイ部３１と第１のポンチ部４１との間の所定位置に供給する。そして、図７に示すように、第１のダイ部３１と第１のポンチ部４１とを相対的に近接させ、金属板１０を圧縮成形する。本実施例では第１のダイ部３１に対して第１のポンチ部４１を近接するようにプレスする。これによって、最終的に軸状突起部１２及び延設部１６を構成とする部品取付用突起１１に形成される仮突起部１８が形成される。
なお、第１のダイ部３１の型内にその第１のダイ部の内底面を形成するように設けられた内型部３１ａ、及び第１のポンチ部４１は、仮突起部１８が成形された金属板１０を好適に脱型するように、入れ子式に型割方向に摺動可能に設けられている。また、本実施例の内型部３１ａは、図６及び７に示すように、スプリング３４によって常に対面する第１のポンチ部４１側へ付勢されており、後端の鍔部で規制されることによって、先端が型割面より突出しないように設けられている。
【００２５】
次に図８に示すように、仮突起部１８がプレス金型の第２のダイ部３２と第２のポンチ部４２とに合わせて位置するように、金属板１０を順送りして供給する。そして、図９に示すように、第２のダイ部３２と第２のポンチ部４２とを相対的に近接させ、金属板１０を圧縮成形する。本実施例では第２のダイ部３２に対して第２のポンチ部４２を近接するように作動させてプレスする。この方法によれば、１回の圧縮工程で成形するよりも高さの大きい軸状突起部１２及び延設部１６を構成とする部品取付用突起１１を、金属板１０に好適に一体成形できる。
すなわち、より条件の厳しい軸状突起部及び延設部を形成することが可能となり、より広範囲な部品の取付構造について部品点数を減らすことができ、製造効率を向上させ、結果的に製造コストを低減できる。
なお、第２のダイ部３２の型内に延設部１６の内面を形成するように設けられたポンチ状の内型部３２ａ、及び第２のポンチ部４２は、部品取付用突起１１が成形された金属板１０を好適に脱型するように、入れ子式に摺動可能に設けられている。
【００２６】
ところで、以上の実施例では１及び２段階の圧縮工程によって、部品取付用突起１１を成形したが、これに限定されることなく、条件によってはさらに多くの工程によって、成形するようにしてもよい。
【００２７】
次に、図１０に基づいて、本実施例の部品取付用突起付き金属板１０Ａに、取付部品２０が取り付けられた取付構造について説明する。
図１０に明らかなように、軸状突起部１２に被挿入孔２２を有する取付部品２０が嵌められ、本実施例では筒状に形成された延設部１６が押し広げ成形によって、取付部品２０が部品取付用突起付き金属板１０Ａに回転可能又は摺動可能に取り付けられている。
なお、本実施例の押し広げ成形とは、延設部１６が径の外側へ押し曲げられる曲げ成形の要素を含むと共に、延設部１６の先端が伸ばされて拡径すると共にその高さを失って潰された状態となるため、カシメよる成形の要素を含むプレス成形である。
【００２８】
これによれば、金属板１０に一体に成形された部品取付用突起１１を用いて、別体で装着される軸部材及びワッシャ等の部品を要せず、しかも簡単な工程で、取付部品２０を精度よく好適に取り付けることができ、結果として製造コストを低減できる。
また、このように別体の軸部材及びワッシャ等の部品を要しないから、この取付構造を用いる精密機器の一層の小型化（薄型化、軽量化）を図ることができる。
【００２９】
また、軸状突起部１２の閉塞部１４を備えるため、前述したように、押し広げ成形が延設部１６になされても、軸状突起部１２が広げられることを好適に阻止することができる。そして、閉塞部１４の存在によって構造的強度を高めることができるため、耐久性等の精密機器の信頼性を好適に向上できる。
また、この取付構造に用いられる部品取付用突起付き金属板１０はバーリング加工によって成形されていないため、前述したような切口が存在せず、押し広げ成形によっても、微細金属粉が発生すること好適に防止でき、この取付構造が用いられる精密機器の信頼性能を向上できる。
ところで、図１０の実施例では、部品取付用突起付き金属板１０Ａの取付部材２０が取り付けられる面側で軸状突起部１２の周囲の部分に、平坦なリング状に突出した段部１９が成形されている。これにより、取付部材２０の部品取付用突起付き金属板１０Ａとの接触面積を小さくでき、運動抵抗を低減できることから、取付部材２０の動作性を向上できる。なお、図１の実施例のように、図１０の実施例のような段部１９のない場合があるのは勿論である。
【００３０】
以上の実施例は、精密機器における回転部品及び摺動部品を金属板から成るシャーシに取り付ける場合について説明したが、本発明はこれに限定されるものではなく、単なる固着を含めて一方の部材を他方の部材に取り付ける用途であれば、好適に応用できるのは勿論である。
以上、本発明につき好適な実施例を挙げて種々説明してきたが、本発明はこの実施例に限定されるものではなく、発明の精神を逸脱しない範囲内で多くの改変を施し得るのは勿論のことである。
【００３１】
【発明の効果】
本発明によれば、軸状突起部が、その軸状突起部の突起先端側を閉塞した状態とする閉塞部を有する筒状に、プレス機による圧縮成形によって突起されて設けられていると共に、延設部が、プレス機による圧縮成形によって突起されて設けられているため、他の部品を要することなく軸状突起部を設けることができ、部品点数を削減でき、プレス一体成形のため生産性も高く、製造コストの低減ができる。
そして、本発明にかかる軸状突起部は閉塞部を有するため強度があり、軸の変形や軸径の歪みが発生することを防止でき、回転軸或いはガイド軸等として安定した製造ができる。このため、回転軸或いはガイド軸等に対する取付部品（回転部品或いは摺動部品等）の軸径方向の取り付け精度を好適に得ることができると共に、スラスト方向のガタも少なく抑えることができ、回転部品或いは摺動部品等の動作の不具合を確実に防止することができるという著効を奏する。
また、本発明にかかる軸状突起部及び延設部は圧縮成形加工によって成形されるため、バーリング成形加工によるようなバリ及び金属粉の発生を防止できる。
さらに、本発明によれば、抜け止め押し広げ成形工程でのバリ及び金属粉の発生も防止できるため、記録メディア装置等の精密機器の分野でも、信頼性の高い部品取付構造を提供できるという著効を奏する。
【図面の簡単な説明】
【図１】本発明にかかる部品取付用突起付き金属板の一実施例を示す断面図である。
【図２】図１の実施例にかかる製造工程を示す工程図である。
【図３】図１の実施例を製造する金型の一実施例及びその動作を説明する断面図である。
【図４】図１の実施例を製造する金型の一実施例及びその動作を説明する断面図である。
【図５】図１の実施例にかかる他の製造工程を示す工程図である。
【図６】図１の実施例を製造する金型の他の実施例及びその動作を説明する断面図である。
【図７】図１の実施例を製造する金型の他の実施例及びその動作を説明する断面図である。
【図８】図１の実施例を製造する金型の他の実施例及びその動作を説明する断面図である。
【図９】図１の実施例を製造する金型の他の実施例及びその動作を説明する断面図である。
【図１０】本発明にかかる部品取付用突起付き金属板を用いた取付構造の一実施例を示す断面図である。
【符号の説明】
１０金属板
１１部品取付用突起
１２軸状突起部
１４閉塞部
１６延設部
１６Ａ抜け止め部
２０取付部品
３０ダイ
４０ポンチ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a metal plate with projections for mounting components, a method for manufacturing the same, and a mounting structure using the same, and more specifically, a shaft shape on which mounting components such as rotating components and sliding components are mounted by processing the metal plate. A protrusion is integrally formed, and an extending portion that is formed when the mounting part is attached to the shaft-like protrusion and becomes a retaining portion is integrally formed on the shaft-like protrusion. The present invention relates to a metal plate with component mounting projections, a method for manufacturing the same, and a mounting structure using the metal plate. For example, a chassis in a mechanical mechanism (OA device, audio device, AV device, etc.), for mounting a rotating shaft with a retaining part for rotating parts or a guide shaft with a retaining part for sliding parts integrally formed The present invention relates to a metal plate with protrusions, a manufacturing method thereof, and a mounting structure using the metal plate.
[0002]
[Prior art]
Conventionally, in the field of precision equipment, in order to provide a shaft-like protrusion for attaching a mounting part such as a rotating part or a sliding part to a chassis made of a metal plate, the metal plate has been manufactured separately. There is a fixed shaft member. For example, a hole is formed in a chassis or the like, and the other end side of the grooved shaft member in which an E-ring groove is formed by cutting on one end side is inserted into the hole, and the shaft member is inserted by caulking on the other end side. Fix to a metal plate. Then, after fitting the attachment part to the shaft member, there is an attachment method in which an E-ring is attached to the groove of the shaft member in order to prevent the attachment part from coming off. Also, after fitting the fitting part to the shaft-like part of the flanged pin with one end, insert the other end of the flanged pin into the hole provided in the metal plate and crimp the other end There was a mounting method to prevent the removal.
[0003]
Also, as another mounting method, a shaft-like projection part to which a mounting part such as a rotating part or a sliding part is attached is formed integrally with the metal plate by drilling a hole in the metal plate, and the shaft. A metal plate with a component mounting projection provided by integrally forming an extension portion that is deformed when the mounting component is mounted on the projecting projection and becomes a retaining portion on the shaft-shaped projection is used. A mounting method has been proposed.
In order to form the shaft-like protrusion and the extended portion into a predetermined rising dimension, it has also been proposed to use a two-stage process of a first burring and a second burring. The attachment structure for attaching the attachment component to the metal plate with the component attachment projection is a kind of eyelet structure, and after fitting the attachment component, the extension portion is bent or deformed by caulking or the like, thereby removing the attachment component. Stopped.
[0004]
[Problems to be solved by the invention]
However, the conventional method of fixing and using a grooved shaft member for E-ring or a pin with a flange by caulking can provide an accurate mounting structure in which the operation of the rotating member or the sliding member is good. There is a problem that the number of points is large, the number of steps for caulking assembly is increased, and the manufacturing cost is increased.
[0005]
In addition, the manufacturing method can be reduced by the conventional method of integrally forming the shaft-shaped protrusion and the extending portion on the metal plate by burring, but the shaft-shaped protrusion (the rotation corresponding to the rotating part) can be reduced particularly in the retaining process. The shaft or the guide shaft corresponding to the sliding part) is easily distorted, and the accuracy of the diametrical dimension deteriorates. As a result, the operation of the rotating member and the sliding part deteriorates, the thrust backlash increases, and the mechanical mechanism becomes defective. There was a problem that it was easy. In other words, the shaft-like protrusions and the extension portions formed by burring are simply raised, and the force that deforms the extension portions increases the diameter of the protrusions of the shaft-like protrusions, in particular the protrusion tips. It is easy to act so as to be deformed (expanded) in the direction of movement.
[0006]
Further, in the case of burring, a cut is formed to make a hole, and fine metal powder is easily generated from the cut. Furthermore, in the process step of deforming the extension part to prevent detachment, the tip of the burring will be further stretched, so that a burr is formed at the tip of the burring that is the cut of the hole, etc. Furthermore, it becomes easy to generate | occur | produce fine metal powder. In particular, in recording media devices (for example, CDs, DVDs, etc.) that have made rapid progress in recent years, the drop of particles such as fine metal powder onto the media is a major factor in failure, so the media can further increase the storage capacity. In order to increase and further refine the media device, it is a serious problem to prevent the generation of fine metal powder.
[0007]
Therefore, an object of the present invention is to reduce the manufacturing cost, and to improve the structural strength of the shaft-like protrusions so that the attachment parts can be suitably attached. An object of the present invention is to provide a metal plate with component mounting projections that can be prevented from being generated, a manufacturing method thereof, and a mounting structure using the same.
[0008]
[Means for Solving the Problems]
The present invention has the following configuration in order to achieve the above object.
That is, in the metal plate with component mounting projections according to the present invention, a shaft-like projection portion to which a mounting component such as a rotating component or a sliding component is attached is integrally formed by processing the metal plate. In the metal plate with component mounting projections, the extension portion that is molded when the mounting component is attached to the portion and becomes a retaining portion is integrally formed on the shaft projection portion. Is formed in a cylindrical shape having a closed portion that closes the protrusion tip side of the shaft-shaped protruding portion, and is formed by compression molding with a press, and the extending portion is configured to The shaft-like projection part is integrally provided following the shaft-like projection part by being formed by compression molding using a press machine, and the extension part is formed with a shoulder part that is stepped in the radial direction with the shaft-like projection part. From the diameter of the shaft-like protrusion Small molded into a cylindrical shape, wherein the closure unit, said and such that the bottom portion of the extended portion at the ceiling of the shaft-like projections, characterized in that it is formed on the inner side of the shoulder.
[0009]
According to this, even if the extending portion is formed to be expanded to prevent the attachment part from being pulled out, the force is not easily transmitted, and it is possible to suitably prevent the shaft-like protrusion from being deformed. Can be suitably maintained.
[0010]
Further, the present invention is a method for manufacturing a metal plate with a component mounting projection for manufacturing the metal plate with a component mounting projection, wherein the molding of the axial projection and the molding of the extending portion, There is also a method of manufacturing a metal plate with projections for component mounting, which is performed by compression molding in one step by a press. According to this, manufacturing efficiency can be improved.
[0011]
Further, the present invention is a method for manufacturing a metal plate with a component mounting projection for manufacturing the metal plate with a component mounting projection, wherein the molding of the axial projection and the molding of the extending portion, By carrying out the compression molding of two or more steps by a press machine, it is possible to more suitably form a shaft-shaped protruding portion and an extending portion having a large height.
[0012]
Further, the mounting structure uses a metal plate with a component mounting projection, wherein the mounting component is mounted on the metal plate with a component mounting projection, wherein the mounting component is fitted into the shaft-shaped projection, and the extension There is also a mounting structure using a metal plate with a protrusion for mounting a component, wherein the mounting part is rotatably or slidably mounted on the metal plate with a protrusion for mounting a component by forming a part by spreading. . According to this, it is possible to attach the attachment component to the metal plate with the component attachment protrusion with low cost and high accuracy by a simple process. Moreover, since this metal plate with component mounting protrusions is not formed by burring, it is possible to suitably prevent the generation of fine metal powder even by expansion.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view showing an embodiment of a metal plate with component mounting projections according to the present invention.
The metal plate with component mounting projections of this embodiment constitutes a chassis in the mechanical mechanism of precision products such as OA equipment, audio equipment or AV equipment, and is provided with a small shaft diameter, for example, about several mm to 5 mm. This is an example in which a rotating shaft with a retaining part for a rotating part or a guide shaft with a retaining part for a sliding part is integrally formed.
[0014]
As shown in FIG. 1 as a basic structure, this metal plate with component mounting protrusions is formed by integrally forming a shaft-shaped protrusion 12 to which a mounting component such as a rotating component or a sliding component is mounted by processing the metal plate. In addition, the extending portion 16 that is deformed when the attachment component 20 is attached to the shaft-like protruding portion 12 and becomes the retaining portion 16A (see FIG. 10) continues on the shaft-like protruding portion 12. It is integrally molded.
Note that the component mounting protrusion 11 is a portion that includes the shaft-shaped protrusion 12 and the extending portion 16 and protrudes from the surface of the metal plate 10.
[0015]
The shaft-like protrusion 12 is provided in a cylindrical shape having a closing portion 14 that closes the protrusion tip side of the shaft-like protrusion 12 by being formed by compression molding with a press machine. The installation part 16 is provided by being protruded by compression molding with a press machine in a form that continues integrally from the shaft-like projection part 12 having the closing part 14.
The above-described shaft-shaped protrusion 12 means a rotating shaft of a rotating part that performs a rotating operation including rotation, or a guide shaft that regulates and guides the operation of a sliding part. In addition, the shaft-like protrusion 12 of the present embodiment is formed in a cylindrical shape and is defined by the diameter thereof, but may be formed in other forms such as an ellipse or an ellipse. Further, the closing portion 14 is a portion that can be expressed as a bottom portion or a ceiling portion of the shaft-like projection portion 12 formed in a cylindrical body (pipe) shape, and of the extending portion 16 formed in a cylindrical body (pipe) shape. This is the part that is also the bottom or ceiling.
[0016]
As described above, in the present embodiment, the shaft-shaped protrusion 12 has the closing portion 14, so that the shaft-shaped protrusion 12 is deformed even if the extending portion 16 is expanded and formed to prevent the attachment component from coming off. This can be suitably prevented, and the mounting accuracy can be suitably maintained. That is, the blocking portion 14 becomes a beam, and the axial protrusion 12 has a shape with a high structural strength that hardly generates distortion, and is difficult to be deformed. The perpendicularity with respect to the metal plate surface can be suitably maintained, and the dimension in the height direction can be stably maintained.
[0017]
In addition, since the shaft-like protrusions 12 and the extending portions 16 are formed by compression molding using a press, there is no problem that fine metal powder is generated as in the case of conventional burring. In the case of burring, a hole is made in a metal plate, the inner peripheral edge of the hole is stretched and raised to form a shaft-like protrusion and an extension, and the extension formed in that way is further formed. Since the portion is deformed so as to be a retaining portion, a large tensile force is applied particularly to the tip of the burring, which is the hole cut. For this reason, the surface becomes rough, it becomes a burr | flash, and fine metal powder generate | occur | produces from the roughened part.
On the other hand, in the present invention, since the molding is performed by compression, the surface does not become rough, and the fine metal powder does not basically generate dust. It is possible to prevent damage to the media.
[0018]
Further, in this embodiment, the extending portion 16 is formed in a cylindrical shape smaller than the diameter of the axial projection 12 so as to be stepped in the radial direction with the axial projection 12. Thereby, even if the extending portion 16 is formed to be expanded to prevent the attachment component from coming off, the shaft-like protrusion 12 can be suitably prevented from being deformed, and the attachment accuracy can be suitably maintained.
In other words, the deformed portion of the extending portion 16 is positioned inside the shoulder portion 12a formed on the tip side of the shaft-like protruding portion 12, and a force for deforming the extending portion 16 acts. Hard to do. For this reason, in combination with the effect of the blocking portion 14 described above, the shaft-like protrusion 12 is not easily deformed not only in the radial direction but also in the height direction which is the thrust direction, and the dimensional accuracy can be maintained.
[0019]
Further, the extending portion 16 is formed thinner than the shaft-shaped protruding portion 12. For this reason, the extended portion 16 is more easily deformed than the axial protrusion, and the shape of the axially extended portion 12 can be relatively maintained.
Therefore, according to the component mounting projection 11 comprising the shaft-shaped projection 12 and the extending portion 16, the mounting component 20 is prevented from coming off so as not to adversely affect the operation of the mounting component 20. It can be suitably attached.
[0020]
Further, as shown in FIG. 1, the component mounting protrusion 11 having the axial protrusion 12 and the extending portion 16 is protruded from the one surface side of the metal plate 10 to a predetermined height. The compression molding is performed so that the wide range of the recess 15 is formed. In this embodiment, the diameter of the recess 15 is formed so as to be larger than the diameter of the shaft-like projection 12, and the thickness of the die 30 will be described later (see FIGS. 3, 4, 6 to 9). It is suitably molded by being pushed into the mold.
[0021]
Next, based on FIGS. 2-4, one Example of the manufacturing process which manufactures the metal plate with a component attachment protrusion shown in FIG. 1 is described. FIG. 2 is a process diagram showing one embodiment according to the manufacturing process of the embodiment of FIG. 3 and 4 are sectional views for explaining an embodiment of the mold for manufacturing the embodiment of FIG. 1 and its operation.
In this embodiment, as shown in FIG. 2, from the flat metal plate (FIG. 2 (a)), the molding of the shaft-shaped protrusion 12 and the molding of the extending portion 16 are performed in one step by a press machine. This is done by compression molding (FIG. 2 (b)). That is, as shown in FIG. 3, the metal plate 10 is supplied to a predetermined position between the die 30 and the punch 40 in the die of the press machine. Then, as shown in FIG. 4, the die 30 and the punch 40 are brought relatively close to each other, and compression molding is applied to the metal plate 10 so as to apply a compressive stress.
The punch-shaped inner mold part 30a and the punch 40 provided so as to form the inner surface of the extending part 16 in the die 30 are preferably removed from the metal plate on which the component mounting projections 11 are formed. It is provided so as to be slidable in the mold-splitting direction in a nested manner.
[0022]
According to this method, the component mounting projection 11 having the axial projection 12 and the extending portion 16 up to a certain height can be suitably integrally formed on the metal plate 10. For example, the component mounting protrusion 11 having the axial protrusion 12 having the same height as the thickness of the metal plate 10 can be suitably formed from a flat plate made of a cold rolled steel plate, which is a general steel material. .
In this embodiment, since the component mounting projections 11 are formed by compression molding in one step, manufacturing efficiency can be improved. Moreover, as a material, a cheap thing can be used without requiring special things, such as steel materials for deep drawing, As a result, manufacturing cost can be reduced.
[0023]
Next, another embodiment of the manufacturing process for manufacturing the metal plate with component mounting protrusions shown in FIG. 1 will be described with reference to FIGS. FIG. 5 is a process diagram showing another manufacturing process according to the embodiment of FIG. 6 to 9 are sectional views for explaining another embodiment of the mold for manufacturing the embodiment of FIG. 1 and the operation thereof.
In this embodiment, as shown in FIG. 5, a flat metal plate (FIG. 5 (a)) is used to form the shaft-shaped protrusion 12 and the extended portion 16 in two steps by a press machine ( This is done by the compression molding shown in FIGS. 5B and 5C.
[0024]
That is, first, as shown in FIG. 6, the metal plate 10 is supplied to a predetermined position between the first die portion 31 and the first punch portion 41 of the press die. And as shown in FIG. 7, the 1st die part 31 and the 1st punch part 41 are made to adjoin relatively, and the metal plate 10 is compression-molded. In this embodiment, the first punch unit 41 is pressed so as to approach the first die unit 31. As a result, the temporary protrusion 18 formed on the component mounting protrusion 11 which finally comprises the shaft-shaped protrusion 12 and the extending portion 16 is formed.
The temporary projection 18 is formed in the inner die 31a and the first punch 41 that are provided so as to form the inner bottom surface of the first die 31 in the mold of the first die 31. The metal plate 10 is provided so as to be slidable in the mold-splitting direction in a nested manner so that the metal plate 10 can be suitably removed. Further, as shown in FIGS. 6 and 7, the inner mold portion 31a of the present embodiment is always urged toward the first punch portion 41 facing the spring 34, and is regulated by the collar portion at the rear end. Thus, the tip is provided so as not to protrude from the mold parting surface.
[0025]
Next, as shown in FIG. 8, the metal plate 10 is fed forward and supplied so that the temporary protrusion 18 is positioned in accordance with the second die part 32 and the second punch part 42 of the press die. And as shown in FIG. 9, the 2nd die | dye part 32 and the 2nd punch part 42 are made to adjoin relatively, and the metal plate 10 is compression-molded. In this embodiment, the second punch portion 42 is operated so as to be close to the second die portion 32 and pressed. According to this method, the component mounting protrusion 11 having the shaft-shaped protrusion 12 and the extending portion 16 which are larger than those formed in a single compression process can be suitably integrally formed on the metal plate 10. .
In other words, it becomes possible to form more stringent shaft-shaped protrusions and extending portions, reduce the number of components for a wider range of component mounting structures, improve manufacturing efficiency, and consequently reduce manufacturing costs. Can be reduced.
The punch-shaped inner mold part 32 a and the second punch part 42 formed so as to form the inner surface of the extending part 16 in the mold of the second die part 32 are formed by the component mounting protrusion 11. The metal plate 10 is provided so as to be slidable in a nested manner so as to be suitably removed.
[0026]
By the way, in the above embodiment, the component mounting projections 11 are formed by the compression process of one and two stages. However, the present invention is not limited to this, and may be formed by more processes depending on conditions. .
[0027]
Next, an attachment structure in which the attachment component 20 is attached to the metal plate 10A with the component attachment protrusion of the present embodiment will be described with reference to FIG.
As apparent from FIG. 10, the mounting component 20 having the insertion hole 22 is fitted to the shaft-shaped protruding portion 12, and in this embodiment, the extending portion 16 formed in a cylindrical shape is expanded and formed by the expansion molding. Is attached to the metal plate 10A with protrusions for component attachment in a rotatable or slidable manner.
The expansion molding of the present embodiment includes a bending element in which the extension portion 16 is pushed and bent to the outside of the diameter, and the tip of the extension portion 16 is extended to expand the diameter and the height thereof is increased. Since it is lost and crushed, it is press molding including the elements of caulking.
[0028]
According to this, by using the component mounting projections 11 formed integrally with the metal plate 10, there is no need for components such as a shaft member and a washer that are separately mounted, and the mounting component 20 can be obtained in a simple process. Can be accurately and suitably attached, and as a result, the manufacturing cost can be reduced.
In addition, since separate parts such as a separate shaft member and a washer are not required in this way, it is possible to further reduce the size (thinner and lighter) of precision equipment using this mounting structure.
[0029]
In addition, since the blocking portion 14 of the shaft-like protruding portion 12 is provided, as described above, it is possible to suitably prevent the shaft-like protruding portion 12 from being widened even if the spread-out molding is performed on the extending portion 16. . And since structural strength can be raised by presence of the obstruction | occlusion part 14, the reliability of precision instruments, such as durability, can be improved suitably.
In addition, since the metal plate 10 with component mounting projections used in this mounting structure is not formed by burring, it does not have a cut as described above, and it is preferable that fine metal powder is generated even by spreading. The reliability performance of precision equipment using this mounting structure can be improved.
By the way, in the embodiment of FIG. 10, a step portion 19 protruding in a flat ring shape is formed on a portion around the shaft-like projection portion 12 on the surface side to which the attachment member 20 of the metal plate with component attachment projection 10 </ b> A is attached. Has been. Thereby, since the contact area with the metal plate 10A with a component attachment protrusion of the attachment member 20 can be made small, and movement resistance can be reduced, the operativity of the attachment member 20 can be improved. Of course, as in the embodiment of FIG. 1, there may be no step 19 as in the embodiment of FIG.
[0030]
In the above embodiment, the case where the rotating part and the sliding part in the precision instrument are attached to the chassis made of the metal plate has been described. However, the present invention is not limited to this, and one member including simple fixing is used. Of course, it can be suitably applied as long as it is attached to the other member.
As described above, the present invention has been described in various ways with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. That is.
[0031]
【The invention's effect】
According to the present invention, the axial protrusion is provided in a cylindrical shape having a closing portion that closes the protrusion tip side of the axial protrusion, and is protruded by compression molding with a press, Since the extended part is protruded by compression molding with a press machine, it is possible to provide a shaft-like protrusion without requiring other parts, reducing the number of parts, and productivity due to press integral molding. The manufacturing cost can be reduced.
And since the axial protrusion part concerning this invention has a blockade part, it has intensity | strength, it can prevent that a deformation | transformation of a shaft and distortion of a shaft diameter generate | occur | produce, and can manufacture stably as a rotating shaft or a guide shaft. For this reason, it is possible to suitably obtain the mounting accuracy in the axial direction of the mounting component (rotating component or sliding component) with respect to the rotating shaft or the guide shaft, etc., and to reduce the backlash in the thrust direction. Alternatively, it is possible to reliably prevent malfunctions of the sliding parts and the like.
Moreover, since the axial protrusion part and extension part concerning this invention are shape | molded by a compression molding process, generation | occurrence | production of the burr | flash and metal powder like a burring shaping | molding process can be prevented.
Furthermore, according to the present invention, it is possible to prevent generation of burrs and metal powder in the retaining and spreading molding process, so that a highly reliable component mounting structure can be provided even in the field of precision equipment such as recording media devices. It is effective.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a metal plate with component mounting protrusions according to the present invention.
FIG. 2 is a process diagram showing a manufacturing process according to the embodiment of FIG. 1;
FIG. 3 is a cross-sectional view illustrating an embodiment of a mold for manufacturing the embodiment of FIG. 1 and its operation.
4 is a cross-sectional view illustrating an embodiment of a mold for manufacturing the embodiment of FIG. 1 and its operation.
FIG. 5 is a process diagram showing another manufacturing process according to the embodiment of FIG. 1;
6 is a cross-sectional view illustrating another embodiment of the mold for manufacturing the embodiment of FIG. 1 and its operation.
7 is a cross-sectional view for explaining another embodiment of the mold for manufacturing the embodiment of FIG. 1 and its operation. FIG.
8 is a cross-sectional view illustrating another embodiment of the mold for manufacturing the embodiment of FIG. 1 and its operation.
FIG. 9 is a cross-sectional view illustrating another embodiment of the mold for manufacturing the embodiment of FIG. 1 and its operation.
FIG. 10 is a cross-sectional view showing an embodiment of a mounting structure using a metal plate with component mounting protrusions according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Metal plate 11 Component attachment protrusion 12 Shaft-shaped protrusion part 14 Blocking part 16 Extension part 16A Detachment part 20 Attachment part 30 Die 40 Punch

Claims

By processing the metal plate, a shaft-like protrusion to which a mounting part such as a rotating part or a sliding part is attached is integrally formed, and is formed and removed when the attachment part is attached to the shaft-like protrusion. In the metal plate with component mounting projections, in which the extending portion serving as the stop portion is integrally formed on the shaft-like projection portion, the shaft-like projection portion closes the projection tip side of the shaft-like projection portion In a form in which a cylindrical shape having a closed portion is provided by being protruded by compression molding with a press machine, and the extending portion is integrally formed from the shaft-like protruding portion having the closed portion. Protruded by compression molding by a machine,
The extending portion is formed into a cylindrical shape smaller than the diameter of the axial protrusion so that a shoulder stepped in the radial direction with the axial protrusion is formed.
The metal plate with component mounting projections , wherein the closing portion is formed inside the shoulder so as to be a ceiling portion of the shaft-like projection portion and a bottom portion of the extension portion .

2. A mounting structure using a metal plate with a component mounting projection, wherein the mounting component is mounted on the metal plate with a component mounting projection according to claim 1, wherein the mounting component is fitted into the shaft-shaped projection, and the extension A mounting structure using a metal plate with a component mounting protrusion, wherein the mounting part is rotatably or slidably mounted on the metal plate with a component mounting protrusion by means of spreading and forming.