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JP2004174646A - Portable power tool - Google Patents

Portable power tool Download PDF

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Publication number
JP2004174646A
JP2004174646A JP2002343033A JP2002343033A JP2004174646A JP 2004174646 A JP2004174646 A JP 2004174646A JP 2002343033 A JP2002343033 A JP 2002343033A JP 2002343033 A JP2002343033 A JP 2002343033A JP 2004174646 A JP2004174646 A JP 2004174646A
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JP
Japan
Prior art keywords
hook
engaged
power tool
holding portion
portable power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP2002343033A
Other languages
Japanese (ja)
Inventor
Koji Matsumoto
宏司 松本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP2002343033A priority Critical patent/JP2004174646A/en
Publication of JP2004174646A publication Critical patent/JP2004174646A/en
Withdrawn legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact type portable power tool for easily changing the position of a checkhook. <P>SOLUTION: This portable power tool includes: a body housing 3 having a hook holding part 8; a checkhook 16 having a shaft part 18; and a stop part 26 for preventing the shaft part 18 from falling off the inside of the hook holding part 8 with the shaft part 18 of the checkhook 16 inserted in the hook holding part 8. As an angle varying mechanism for locking the checkhook 16 at that angle when the rotational load imposed on the checkhook 16 is a designated value or less, and rotating the checkhook round the shaft part 18 by unlocking when the rotational load imposed on the checkhook 16 is a designated value or more, an engagement part 14 is formed on the hook holding part 8, and an engaged part 25 engaged with the engagement part 14 is formed on the checkhook 16, and a spring 28 is provided for energizing the engagement part 14 and the engaged part 25 in the direction of engagement and simultaneously abutting the same. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は可搬式の電動工具に関し、詳しくは、本体ハウジングに接続して設けた掛止用フックの角度を可変にする為の技術に関する。
【0002】
【従来の技術】
従来から、作業者の腰ベルト等に引掛けておく為のフックを備えた可搬式の電動工具がある。上記フックが電動工具の本体ハウジングから突出した状態で固定配置されていると、フックを使用しない場合にも該フックが作業中に周辺部材を傷付けたり、狭い場所で邪魔になる又は作業者に引っ掛かることで作業効率を低下させたり、収納に必要なスペースが大きくなってしまう、等の問題が生じる。
【0003】
上記問題を解消する為に、本体ハウジングにバンドを介してフックを着脱自在に設け、不使用時には取外せるようにしたものがある(特許文献1参照)。しかしながら、このものにおいては、作業に応じてフックを着脱しなくてはならず不便であるとともに、取外したフックを紛失してしまうといった問題があった。そこで、本体ハウジングに設けた凹部内にフックをスライドさせて収納するものが提案されており(特許文献2参照)、このものにおいては、フックを着脱する必要がなく便利であって、更にフックを紛失する恐れもない。しかしながら、この場合には、本体ハウジングにフックを収納するフック収納部やフックをスライドさせるガイド部やフックを支持する支持部を埋設しなくてはならず、電動工具が全体に大型化してしまうという問題があった。
【0004】
また、本体ハウジングの一側面に取付け部を設けて該取付け部にフックを弾性係止させるものも提案されている(特許文献3参照)。しかしながら、このものにおいては、外力によってフックが簡単に回動してしまい安定性が悪いとともに、作業者が右利きと左利きのどちらであっても使用可能にするには本体ハウジングの左右両側面に取付け部を設ける必要があって、使用しない側の取付け部が作業者の邪魔になるという問題があった。
【0005】
また、図10〜図12に示すように、電動工具本体51に係止歯52を有するフック保持部53を延設し、嵌合歯54を有するフック55をこのフック保持部53に挿入して係止歯52と嵌合歯54の噛合いによりフック55を係止する構造であって、この係止歯52と嵌合歯54とが噛合う方向への付勢力をフック55に与える弾性体を備えたものも提案されている(特許文献4参照)。しかしながら、このものにおいては、係止歯52と嵌合歯54との噛合いを解除してフック55を回転させる為には付勢力に抗して一旦フック55を外部方向(図10、図11中のa方向)に引っ張り出す作業が必要であり、角度変更をワンタッチで行えず不便であるとともに、腰ベルトにフック55を引掛けた状態で作業者が腰を横方向に回転させた場合には電動工具本体51側が遠心力により外向きに引張られ、フック55の係止が解除されて不意に角度が変化してしまうといった問題があった。
【0006】
【特許文献1】
実開平6−31974号公報
【特許文献2】
特開2000−167785号公報
【特許文献3】
特開平9−225861号公報
【特許文献4】
特開2002−254358号公報
【0007】
【発明が解決しようとする課題】
本発明は上記の点に鑑みてなされたものであり、フックが作業中に周辺部材を傷付けたり作業効率を低下させたりすることを防止するとともに、収納に要するスペースを抑制する為に、フックを使用しない場合にはフックの位置をワンタッチで容易に変更することのできるコンパクトな可搬式電動工具を提供することを第一の課題とし、フックを腰ベルトに引掛けた状態で作業者が腰を横方向に回転させた場合にフックの角度が不意に変化してしまうことを防止することを第二の課題とするものである。
【0008】
【課題を解決するための手段】
上記課題を解決するために本発明を、フック保持部を有する本体ハウジングと、軸部を有する掛止用フックと、掛止用フックの軸部をフック保持部内に挿入した状態でフック保持部内からの軸部の脱落を防止する抜け止め部とを備えた可搬式電動工具において、掛止用フックにかかる回転負荷が所定値以下の場合は該掛止用フックをその角度に係止させ、且つ、掛止用フックにかかる回転負荷が所定値を超える場合は係止解除により該掛止用フックを軸部中心に回転させる角度可変機構として、フック保持部に係合部を形成し、掛止用フック若しくは該掛止用フックと一体回転する部材に前記係合部と係合する被係合部を形成し、係合部と被係合部とをその係合方向に付勢力を与えながら当接させる付勢手段を設けたことを特徴としたものとする。このようにすることで、付勢手段による付勢力に抗して係合部と被係合部との係合を解除するだけの回転負荷を与えた場合に掛止用フックを回転させることができ、操作としては掛止用フックに回転負荷を加えるだけのワンタッチ操作で容易に角度変更が可能となる。
【0009】
また、係合部及び被係合部を、フック保持部に挿入される軸部の軸方向に向けて凹凸をなすように形成することも好ましい。このようにすることで、掛止用フックの回転と連動して、掛止用フックや該掛止用フックと一体回転する部材が軸方向に移動することにより、係合部と被係合部との係合を円滑に解除することができる。
【0010】
また、係合部及び被係合部を、付勢手段の付勢力に抗して係合を解除して被係合部が係合部を乗り越えた後に、該付勢力により再度係合するように設けることも好ましい。このようにすることで、掛止用フックを回転させて多段階の角度において係止させておくことが可能となり、状況に応じて掛止用フックの位置を多様に変更することができる。
【0011】
また、掛止用フックに被係合部を形成し、フック保持部の前記被係合部との対向箇所に係合部を形成することも好ましく、このようにすることで、掛止用フックとフック保持部との間で掛止用フックの係止状態や係止解除状態を操作することができる。そして、抜け止め部を軸部の先端側に固定し、抜け止め部に設けたフック側当て面と、前記フック側当て面よりも軸部の根元側に位置するようにフック保持部に設けた保持部側当て面との間に、弾性体を圧縮配設して付勢手段とすることも好ましく、このようにすることで、抜け止め部を介して掛止用フックに係合部と被係合部とを係合させる方向の付勢力を与えることができる。
【0012】
また、抜け止め部を軸部の先端側に固定し、掛止用フックと一体回転する部材である前記抜け止め部に被係合部を形成し、フック保持部の抜け止め部との対向箇所に係合部を形成することも好ましく、このようにすることで、抜け止め部とフック保持部との間で掛止用フックの係止状態や係止解除状態を操作することができる。そして、掛止用フックに設けたフック側当て面と、前記フック側当て面よりも軸部の先端側に位置するようにフック保持部に設けた保持部側当て面との間に、弾性体を圧縮配設して付勢手段とすることも好ましく、このようにすることで、掛止用フックを介して抜け止め部に係合部と被係合部とを係合させる方向の付勢力を与えることができ、この付勢力に抗して係合部と被係合部との係合を解除する方向が、掛止用フックがフック保持部側に引き込まれる方向であって、掛止用フックを腰ベルトに引掛けた状態で作業者が腰を横方向に回転させた場合に掛止用フックに生じる外力の方向とは逆方向なので、掛止用フックの角度が不意に変化してしまうことが防止される。
【0013】
また、本体ハウジングの下端部に動力源である電池パックを接続するものにおいて、フック保持部を、本体ハウジングの電池パックとの接続面よりも上方に形成することも好ましい。このようにすることで、電池パックを取外した状態で接続面を地面等に載置すると、フック保持部に掛止用フックを装着していずれの角度に係止している場合であっても、電動工具本体だけで自立可能となる。
【0014】
【発明の実施の形態】
以下、本発明を添付図面に示す実施の形態に基づいて説明する。図4、図5には、本発明の実施の形態における一例の可搬式電動工具の全体を示している。一例の可搬式電動工具は、電動工具本体1とこれに接続した電池パック2とで主体を構成する電動ドライバであって、電動工具本体1の略T型を成す本体ハウジング3内には、動力源である電池パック2から供給される電気エネルギにより回転駆動されるモータ4と、モータ4への電気エネルギの入り切りを操作するスイッチ5と、モータ4の回転を締結作業や穴あけ作業に適した回転数等に変換して伝達する減速機ブロック6とを備え、スイッチ5の操作に基づいてモータ4の回転力をチャック7に保持した先端工具(図示せず)にまで伝達して作業を行うものである。なお、以下の説明文中において、電動工具本体1のチャック7を設けた側を正面側、電池パック2を接続した側を下側とする。
【0015】
図1〜図3に示すように、本体ハウジング3の把持部分であるグリップ部3aの背面には、フック保持部8を背方に向けて延設している。フック保持部8は本体ハウジング3と同一の樹脂によって同時に成形されるものであり、両側方に開口した貫通穴9を備えて略円筒状を成している。貫通穴9を構成する中央穴部10と両側穴部11,11とでは、中央穴部10が両側穴部11,11よりも段部12,12を介して小径に形成されており、上記中央穴部10が後述する掛止用フック16の挿入穴13となっている。いずれの段部12,12にも、挿入穴13の軸方向(即ち、挿入穴13に挿入される後述の軸部18の軸方向)に向けて波型の凹凸を成す係合部14,14を突設しており、また、いずれの側穴部11,11の内周壁にも、回転規制溝15,15を周方向に伸びるように凹設している。
【0016】
掛止用フック16は、略ヘ字状に形成したハンドル部17とこれの根元部分に突設した略円柱状の軸部18とで主体を構成している。軸部18は根元部19と先端部20とから成り、先端部20は段部21を介して根元部19より小径に形成している。先端部20は前記挿入穴13と嵌合し且つこの嵌合状態で軸中心に回転摺動可能となるように形成しており、根元部19の側面には回転規制リブ22を突設している。この回転規制リブ22は、先端部20と挿入穴13との嵌合状態において回転規制溝15内で回転摺動自在となるものである。段部21には、軸部18の先端部20側を向く軸方向に波型の凹凸をなす被係合部25を、先端部20と挿入穴13との嵌合状態において係合部14と対向して係合可能となるように形成している。また、軸部18には金属ねじ23をインサート成形しており、軸部18を構成する先端部20の先端からこの金属ねじ23を一部突出させて該突出部分を螺合部24としている。掛止用フック16は樹脂成形されるものであるが、金属ねじ23を用いたことでねじ部分の強度は確保されている。
【0017】
軸部18の先端部20が挿入穴13に嵌合し、且つ、係合部14と被係合部25とが係合した状態において、連通穴9の両側穴部11,11のうち被係合部25が位置する側と逆側の側穴部11(以下、側穴部11´という)の開口位置にある螺合部24には、抜け止め部26に設けた雌ねじ状の被螺合部27を螺合させている。抜け止め部26にはコイン等を嵌め込んで回転させられる溝部28を凹設して螺合部24との着脱を容易にしている。なお、強度確保の為には金属ナットを抜け止め部26にインサート成形することが好ましい。
【0018】
そして、上記のようにして抜け止め部26を軸部18に固定した状態において、フック保持部8の側穴部11´にある係合部14と、抜け止め部26の該係合部14との対向箇所との間には、弾性体であるばね29を圧縮配設している。ばね29が発生させる付勢力は、抜け止め部26と掛止用フック16を一体に図中のA方向に付勢する力となり、これにより被係合部25が係合部14に押付けられている。つまり、一例においては、ばね29の一端側が当たる抜け止め部26の面がフック側当て面30となり、ばね29の他端側が当たる係合部14の面が、前記フック側当て面30よりも軸部18の根元側に位置する保持部側当て面31となっている。そして、フック側当て面30と保持部側当て面31との間に圧縮配設したばね29が、被係合部25と係合部14とをその係合方向に付勢力を与えながら当接させる付勢手段32となっている。
【0019】
上記の掛止用フック16を電動工具本体1に装着するには、掛止用フック16の軸部18をフック保持部8の貫通穴9内に一方の側穴部11側から挿入し、該側穴部11側の係合部14と被係合部25とを係合させた状態で、他方の側穴部11´側にばね29を挿入して、該ばね29をフック保持部8との間で圧縮させながら抜け止め部26を軸部18の螺合部24に螺合させていけば良い。この際、抜け止め部26の回転と連動して、ばね29がフック保持部8にその先端を突き刺すように動いてしまっては作業に支障があるので、ばね29として左巻きのものを使用し且つ先端を研磨しておくことが好適である。螺合による抜け止め部26の固定完了時には、抜け止め部26とフック保持部8との間には所定間隔Dが形成されるものとする。
【0020】
掛止用フック16の上記装着状態において、係合部14と被係合部25とは、ばね29の付勢力によりその係合方向に付勢されながら係合しているので、仮に掛止用フック16のハンドル部17に回転負荷がかかったとしても、該回転負荷が所定値を超えない限りは、掛止用フック16はその角度のままで電動工具本体1に係止されることとなる。加えて、抜け止め部26は側穴部11の開口径よりも大径の外形を有しているので、掛止用フック16が電動工具本体1から脱落することも確実に防止されるものである。
【0021】
そして、ハンドル部17にかかる回転負荷が所定値を超えた場合には、ばね29の付勢力に抗して係合部14と被係合部25との係合が解除されて、被係合部25が係合部14を乗り越えながら回転し、その後にばね29の付勢力によって係合部14と被係合部25とは回転前と別の噛合い状態で再度係合する。係合部14及び被係合部25はそれぞれ周方向に多数の凹凸を連設した波型形状であるので、掛止用フック16が電動工具本体1に対して多段階の角度に位置する場合において、それぞれ対応する噛合い状態で係合部14と被係合部25とを係合させて掛止用フック16をその角度に係止することができ、更に、所定値以上の回転負荷を与えれば回転により他のいずれの角度にも問題なく変更可能である。図2に示すように、掛止用フック16の角度変更時、即ち、係合部14が被係合部25を乗り越える時には、ハンドル部17がフック保持部8から側方に押出されるのと同時に抜け止め部26はフック保持部8側に引き込まれるが、抜け止め部26とフック保持部8との所定間隔Dをこの際の抜け止め部26の移動間隔以上に設定しているので、角度変更は問題なく行われる。
【0022】
つまり、上記の係合部14、被係合部25、ばね29等により、掛止用フック16にかかる回転負荷が所定値以下の場合は該掛止用フック16をその角度に係止させ、且つ、掛止用フック16にかかる回転負荷が所定値を超える場合は係止解除により該掛止用フック16を軸部18中心に回転させる角度可変機構が形成されており、更に、角度変更後は別の角度で多段階に掛止用フック16を係止可能になっている。回転負荷の所定値としては、実際に腰ベルトに引掛けて使用する可搬式電動工具が安全面から小型のものに限定されることを考慮して、掛止用フック16の使用中に容易に角度変更がされない程度であれば良い。
【0023】
掛止用フック16の軸部18を中心とした回転は、回転規制溝15内を回転規制リブ22が移動する範囲内に規制されており、例えば図6に示すように、ハンドル部17が略水平となってその先端部分が本体ハウジング3の下端部に幅広に形成した電池パック取付部3bの上面に当接する状態である位置Pから、ハンドル部17が略垂直となる状態である位置Pにまで、軸部18を中心とした略90度の範囲内で回転可能となっている。上記位置Pは掛止用フック16の非使用時の収納位置であって、このようにハンドル部17を本体ハウジング3に押し当てた状態にしておくことで、軸部18近傍への負荷の集中が防止される。更に、フック保持部8は電動工具本体1の電池パック2との接続面Sよりも上方に形成しているので、図7に示すように電池パック2を取外した状態で接続面Sを載置面60上に置けば、フック保持部8に掛止用フック16を装着していずれの角度に係止している場合であっても、電動工具本体1だけで自立可能である。
【0024】
また、掛止用フック16は、フック保持部8に装着されていずれの角度に係止されている場合であっても、上方から見て本体ハウジング3の電池パック取付部3bから側方にはみ出さないように形成している。これにより、電動工具本体1が落下した場合であっても掛止用フック16に直接衝撃が伝わって破損を生じることが回避されるとともに、掛止用フック16の装着、未装着によって可搬式電動工具全体の寸法に生じる寸法の差が小さくなり、収納ケース等を共用することが容易となる。
【0025】
なお、フック保持部8の構造は左右対象に形成しているので、掛止用フック16の装着方向は図示の方向に限定されるものではなく、貫通穴9の逆側、即ち図示の場合の側穴部11´側から軸部18を挿入して左右逆側に掛止用フック16を装着しても良い。これにより、作業者が右利きと左利きのどちらであっても快適に使用可能となっている。
【0026】
しかして、上記した一例の可搬式電動工具によれば、適当な角度に設定した掛止用フック16を腰ベルトに引掛けておくことができ、引掛けておく必要がない場合は掛止用フック16を邪魔にならない位置(例えば位置P)にまで回転させておけば、作業中に周辺部材を傷付けたり作業効率を低下させたりすることがなくなり、また、収納時のスペースを小さくすることができる。更に、このように掛止用フック16を回転させて角度を変更するのにハンドル部17に回転負荷を与えるだけのワンタッチ作業で良く作業が楽であるとともに、このようにする為の構造自体もシンプルで可搬式電動工具全体のコンパクト化が図られるという利点がある。
【0027】
次に、本発明の実施の形態における他例の可搬式電動工具について説明する。他例の基本的構成は一例と略同一なので、共通の構成については同一符号を付して説明を省略するとともに、他例の特徴的な構成及び作用効果について以下に詳しく説明する。図8に示すように、他例においては、掛止用フック16の軸部18の主体を、円柱状の本体部33とこれの先端から突設した多角柱状の嵌合部34とで構成している。軸部18の軸方向に貫設したねじ穴35内には取付ねじ36を挿入させており、取付ねじ36の先端部分が嵌合部34の先端から突出して螺合部38となっている。本体部33は、フック保持部8の貫通穴9内にて小径の挿入穴13部分に嵌合して回転摺動可能となっており、この嵌合状態で本体部33の側面から突設した回転規制リブ37が回転規制溝15内で回転摺動するようになっている。
【0028】
他例の抜け止め部26には、被螺合部27の周囲を延長して嵌合部34と嵌合する多角形穴を備えた被嵌合部39を形成しており、更に、被嵌合部39の先端からは周方向に多数の凹凸を連設した波型形状の被係合部40を突設している。そして、挿入穴13に軸部18の本体部33が嵌合した状態において、連結穴9の側穴部11´内にて、軸部18の嵌合部34を抜け止め部26の被嵌合部39と嵌合させ、軸部18の螺合部38を抜け止め部26の被螺合部27と螺合させることで、軸部18に抜け止め部26を固定している。抜け止め部26の被係合部40は、この固定状態においてフック保持部8の側穴部11´側に形成した係合部14と対向して係合可能なように、周方向に多数の凹凸を連設した波状形状に形成している。
【0029】
そして、抜け止め部26を固定した側と逆側の側穴部11において、係合部14と、回転規制リブ22の該係合部14との対向箇所との間には、弾性体であるばね41を圧縮配設している。ばね41の発生させる付勢力は、抜け止め部26と掛止用フック16を一体に図中のB方向に付勢する力となり、これにより被係合部40が係合部14に押付けられて係合している。つまり、他例においては、ばね41の一端側が当たる回転規制リブ22の面がフック側当て面42となり、ばね41の他端側が当たる係止部14の面が、前記フック側当て面42よりも軸部18の先端側に位置する保持部側当て面43となっている。そして、フック側当て面42と保持部側当て面43との間に圧縮配設したばね41が、被係合部40と係合部14とをその係合方向に付勢力を与えながら当接させる他例の付勢手段44となっている。
【0030】
上記の掛止用フック16を電動工具本体1に装着するには、フック保持部8の側穴部11の保持部側当て面43にばね41の一端を当てた状態で、掛止用フック16の軸部18を該側穴部11側から挿入し、ばね41をフック側当て面42と保持部側当て面43との間で圧縮させつつ、他方の側穴部11´側にて抜け止め部26の被嵌合部39に軸部18の嵌合部34を嵌合させ、そして、ねじ穴35に挿入した取付ねじ36を回して螺合部38と被螺合部27とを螺合させると良い。
【0031】
掛止用フック16の上記装着状態において、仮に掛止用フック16のハンドル部17に回転負荷がかかても、該回転負荷が所定値を超えない限りは、掛止用フック16はその角度のままで電動工具本体1に係止される。そして、ハンドル部17にかかる回転負荷が所定値を超えた場合には、ばね41の付勢力に抗して係合部14と被係合部40との係合が解除されて、被係合部40が係合部14を乗り越えながら回転し、その後にばね41の付勢力によって係合部14と被係合部40とは回転前と別の噛合い状態で再度係合する。係合部14及び被係合部40はそれぞれ周方向に多数の凹凸を連設した波型形状であるので、掛止用フック16が電動工具本体1に対して多段階の角度に位置する場合に、それぞれ別の噛合い状態で係合部14と被係合部40とを係合させて掛止用フック16をその角度に係止することができ、更に、所定値以上の回転負荷を与えれば係止を解除して回転により他のいずれの角度にも問題なく変更可能である。
【0032】
加えて、図9に示すように、係合部14が被係合部40を乗り越えて角度が変更される時には、ハンドル部17がフック保持部8の内方に引き込まれる方向に掛止用フック16全体が移動するようになっているので、掛止用フック16を腰ベルトに引掛けた状態で作業者が腰を横方向に回転させ、ハンドル部17を側方に引張りだす外力が働いた場合にも、掛止用フック16の角度が不意に変化してしまうことがないものである。
【0033】
【発明の効果】
上記のように請求項1記載の発明にあっては、付勢手段による付勢力に抗して係合部と被係合部との係合を解除するだけの回転負荷を与えた場合に掛止用フックを回転させることができ、操作としては掛止用フックに回転負荷を加えるだけのワンタッチ操作で容易に角度変更が可能になるという効果がある。
【0034】
また、請求項2記載の発明にあっては、請求項1記載の発明の効果に加えて、掛止用フックの回転と連動して、掛止用フックや該掛止用フックと一体回転する部材が軸方向に移動することにより、係合部と被係合部との係合を円滑に解除することができるという効果がある。
【0035】
また、請求項3記載の発明にあっては、請求項1又は2記載の発明の効果に加えて、掛止用フックを回転させて多段階の角度において係止させておくことが可能となり、状況に応じて掛止用フックの位置を多様に変更することができるという効果がある。
【0036】
また、請求項4記載の発明にあっては、請求項1〜3のいずれか記載の発明の効果に加えて、掛止用フックとフック保持部との間で掛止用フックの係止状態や係止解除状態を操作することができるという効果がある。
【0037】
また、請求項5記載の発明にあっては、請求項4記載の発明の効果に加えて、抜け止め部を介して掛止用フックに係合部と被係合部とを係合させる方向の付勢力を与えることができるという効果がある。
【0038】
また、請求項6記載の発明にあっては、請求項1〜3のいずれか記載の発明の効果に加えて、抜け止め部とフック保持部との間で掛止用フックの係止状態や係止解除状態を操作することができるという効果がある。
【0039】
また、請求項7記載の発明にあっては、請求項6記載の発明の効果に加えて、掛止用フックを介して抜け止め部に係合部と被係合部とを係合させる方向の付勢力を与えることができ、この付勢力に抗して係合部と被係合部との係合を解除する方向が、掛止用フックがフック保持部側に引き込まれる方向であって、掛止用フックを腰ベルトに引掛けた状態で作業者が腰を横方向に回転させた場合に掛止用フックに生じる外力の方向とは逆方向なので、掛止用フックの角度が不意に変化してしまうことが防止されるという効果がある。
【0040】
また、請求項8記載の発明にあっては、請求項1〜7のいずれか記載の発明の効果に加えて、電池パックを取外した状態で接続面を地面等に載置すれば、フック保持部に掛止用フックを装着していずれの角度に係止している場合であっても、電動工具本体だけで自立可能になるという効果がある。
【図面の簡単な説明】
【図1】本発明の実施の形態における一例の可搬式電動工具の掛止用フックが係止された状態を示す水平断面図である。
【図2】同上の可搬式電動工具における掛止用フックの角度変更中を示す水平断面図である。
【図3】同上の可搬式電動工具の一部分解斜視図である。
【図4】同上の可搬式電動工具の全体斜視図である。
【図5】同上の可搬式電動工具の本体ハウジングを一部外した状態の全体斜視図である。
【図6】同上の可搬式電動工具における掛止用フックの係止位置を示す説明図である。
【図7】同上の可搬式電動工具の電池パックを取外して載置した状態を示す説明図である。
【図8】本発明の実施の形態における他例の可搬式電動工具の掛止用フックが係止された状態を示す水平断面図である。
【図9】同上の可搬式電動工具における掛止用フックの角度変更中を示す水平断面図である。
【図10】従来の可搬式電動工具を示す全体斜視図である。
【図11】同上の可搬式電動工具のフック係止状態を示す説明図である。
【図12】同上の可搬式電動工具のフック角度変更状態を示す説明図である。
【符号の説明】
2 電池パック
3 本体ハウジング
8 フック保持部
14 係合部
16 掛止用フック
18 軸部
24 螺合部
25 被係合部
26 抜け止め部
29 ばね
30 フック側当て面
31 保持部側当て面
32 付勢手段
41 ばね
42 フック側当て面
43 保持部側当て面
44 付勢手段
S 接続面
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a portable power tool, and more particularly, to a technique for changing an angle of a hook hook connected to a main body housing.
[0002]
[Prior art]
BACKGROUND ART Conventionally, there is a portable power tool provided with a hook to be hooked on a waist belt or the like of an operator. If the hook is fixedly arranged so as to protrude from the main body housing of the power tool, even when the hook is not used, the hook may damage peripheral members during work, may interfere in a narrow place, or may be caught by an operator. This causes problems such as a decrease in work efficiency and an increase in space required for storage.
[0003]
In order to solve the above problem, there is an apparatus in which a hook is detachably provided on a main body housing via a band so that the hook can be removed when not in use (see Patent Document 1). However, in this case, there is a problem that the hook has to be attached and detached according to the work, which is inconvenient and that the removed hook is lost. Therefore, there has been proposed a device in which a hook is slid and stored in a concave portion provided in a main body housing (see Patent Document 2). In this device, it is not necessary to attach / detach the hook, which is convenient. There is no risk of loss. However, in this case, it is necessary to embed a hook storage portion for storing the hooks in the main body housing, a guide portion for sliding the hooks, and a support portion for supporting the hooks, and the power tool becomes larger as a whole. There was a problem.
[0004]
Further, there has been proposed a device in which a mounting portion is provided on one side surface of a main body housing and a hook is elastically engaged with the mounting portion (see Patent Document 3). However, in this case, the hook is easily rotated by an external force, so that the stability is poor. In addition, in order to enable the operator to use either the right-handed or the left-handed, the hook is provided on both the left and right sides of the main body housing. It is necessary to provide a mounting portion, and there is a problem that the mounting portion on the side not used obstructs the operator.
[0005]
As shown in FIGS. 10 to 12, a hook holding portion 53 having locking teeth 52 is extended from a power tool main body 51, and a hook 55 having fitting teeth 54 is inserted into the hook holding portion 53. An elastic body that applies a biasing force to the hook 55 in a direction in which the locking teeth 52 and the fitting teeth 54 mesh with each other, the hook 55 being configured to lock the hook 55 by meshing between the locking teeth 52 and the fitting teeth 54. There has also been proposed a device provided with (see Patent Document 4). However, in this case, in order to release the engagement between the locking teeth 52 and the fitting teeth 54 and rotate the hook 55, the hook 55 must be temporarily moved outward (FIGS. 10 and 11) against the urging force. (A direction in the middle)), it is inconvenient because the angle cannot be changed with one touch, and when the worker turns the waist in the lateral direction while the hook 55 is hooked on the waist belt. There was a problem in that the power tool body 51 side was pulled outward by centrifugal force, the hook 55 was unlocked, and the angle was suddenly changed.
[0006]
[Patent Document 1]
JP-A-6-31974
[Patent Document 2]
JP 2000-167785 A
[Patent Document 3]
JP-A-9-225861
[Patent Document 4]
JP-A-2002-254358
[0007]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and in order to prevent the hook from damaging peripheral members or lowering the work efficiency during the operation, and to reduce the space required for storage, the hook is The first task is to provide a compact portable power tool that can easily change the position of the hook with one touch when not in use. A second object is to prevent the hook angle from suddenly changing when the hook is rotated in the lateral direction.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides a main body housing having a hook holding portion, a hook having a shank, and a hook having a shank inserted into the hook holding portion. A portable power tool provided with a retaining portion for preventing the shaft portion from falling off, when the rotational load applied to the hook is not more than a predetermined value, the hook is locked at that angle, and When the rotation load applied to the hook for hooking exceeds a predetermined value, an engaging portion is formed on the hook holding portion as an angle variable mechanism for rotating the hook for hooking about the shaft by releasing the lock, Forming an engaged portion that engages with the engaging portion on the hook for hooking or a member that rotates integrally with the hook for hooking, while applying an urging force to the engaging portion and the engaged portion in the engaging direction. Characterized in that it is provided with a biasing means for abutting. That. With this configuration, it is possible to rotate the hook for hooking when a rotational load sufficient to release the engagement between the engaging portion and the engaged portion is applied against the urging force of the urging means. The angle can be easily changed by a one-touch operation simply by applying a rotational load to the hook for hooking.
[0009]
It is also preferable that the engaging portion and the engaged portion are formed so as to be uneven in the axial direction of the shaft portion inserted into the hook holding portion. With this configuration, the hook and the member that rotates integrally with the hook move in the axial direction in conjunction with the rotation of the hook, so that the engaging portion and the engaged portion are moved. Can be smoothly released.
[0010]
Further, after the engagement portion and the engaged portion are disengaged against the urging force of the urging means and the engaged portion gets over the engaging portion, the engagement portion and the engaged portion are reengaged by the urging force. Is also preferable. By doing so, it is possible to rotate the hook for locking and lock the hook at multiple angles, and the position of the hook for hooking can be changed variously according to the situation.
[0011]
Further, it is preferable that the engaged portion is formed on the hook for hooking, and the engaging portion is formed on a portion of the hook holding portion facing the engaged portion. In this manner, the hook for hooking is formed. It is possible to operate the locking state and the unlocking state of the hook between the hook and the hook holding portion. Then, the retaining portion was fixed to the distal end side of the shaft portion, and the hook-side contact surface provided on the retaining portion and the hook holding portion were provided so as to be located closer to the root of the shaft portion than the hook-side contact surface. It is also preferable that an elastic body is compressed and arranged between the holding part side contact surface and the urging means, so that the engaging hook and the engaging part are covered with the hook for hooking through the retaining part. An urging force in a direction for engaging the engaging portion can be applied.
[0012]
Further, the retaining portion is fixed to the distal end side of the shaft portion, and the engaged portion is formed on the retaining portion, which is a member that rotates integrally with the hook, and the hook holding portion is opposed to the retaining portion. It is also preferable to form an engaging portion on the hook, so that the locking state and the unlocking state of the hook can be operated between the retaining portion and the hook holding portion. An elastic body is provided between a hook side contact surface provided on the hook for hooking and a holding portion side contact surface provided on the hook holding portion so as to be located on the tip end side of the shaft portion with respect to the hook side contact surface. It is also preferable to provide a biasing means by compressing and disposing the biasing force. In this manner, the biasing force in the direction in which the engaging portion and the engaged portion are engaged with the retaining portion via the hooking hook. The direction in which the engaging portion and the engaged portion are disengaged against this biasing force is the direction in which the hook for hooking is pulled into the hook holding portion side, and When the worker rotates the waist sideways while the hook is hooked on the waist belt, the direction of the external force generated on the hook is opposite to the direction of the external force, so the angle of the hook changes suddenly. Is prevented.
[0013]
Further, in the case where the battery pack as a power source is connected to the lower end of the main body housing, it is preferable that the hook holding portion is formed above the connection surface of the main body housing with the battery pack. With this configuration, when the connection surface is placed on the ground or the like with the battery pack removed, even if the hook is attached to the hook holding portion and the hook is held at any angle. Independent of the power tool body alone.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. 4 and 5 show an entire portable electric tool according to an embodiment of the present invention. One example of a portable power tool is an electric driver mainly composed of a power tool main body 1 and a battery pack 2 connected to the power tool main body. A motor 4 rotationally driven by electric energy supplied from a battery pack 2 serving as a power source, a switch 5 for turning on and off the electric energy to and from the motor 4, and a rotation suitable for fastening work and drilling work. A speed reducer block 6 for converting the number into a number or the like and transmitting the same, and transmitting the rotational force of the motor 4 to a tip tool (not shown) held on the chuck 7 based on the operation of the switch 5 to perform an operation. It is. In the following description, the side where the chuck 7 of the power tool main body 1 is provided is referred to as a front side, and the side where the battery pack 2 is connected is referred to as a lower side.
[0015]
As shown in FIGS. 1 to 3, a hook holding portion 8 extends rearward on a back surface of a grip portion 3 a which is a grip portion of the main body housing 3. The hook holding portion 8 is formed simultaneously with the same resin as the main body housing 3 and has a substantially cylindrical shape with through holes 9 opened on both sides. The central hole 10 and the side holes 11, 11 constituting the through hole 9 are formed with a smaller diameter through the stepped portions 12, 12 than the side holes 11, 11. The hole 10 serves as an insertion hole 13 for a hook 16 to be described later. Each of the steps 12, 12 has an engaging portion 14, which has a corrugated shape in the axial direction of the insertion hole 13 (that is, the axial direction of a shaft 18 to be described later inserted into the insertion hole 13). The rotation regulating grooves 15 are formed in the inner peripheral walls of the side holes 11 so as to extend in the circumferential direction.
[0016]
The hook 16 is mainly composed of a handle portion 17 formed in a substantially rectangular shape and a substantially cylindrical shaft portion 18 protruding from a base portion thereof. The shaft portion 18 includes a root portion 19 and a distal end portion 20, and the distal end portion 20 has a smaller diameter than the root portion 19 via a step portion 21. The distal end portion 20 is formed so as to be fitted in the insertion hole 13 and to be rotatable and slidable about the shaft in this fitted state. I have. The rotation restricting rib 22 is rotatable and slidable in the rotation restricting groove 15 when the distal end portion 20 and the insertion hole 13 are fitted. The stepped portion 21 is provided with an engaged portion 25 having a corrugated shape in the axial direction facing the distal end portion 20 of the shaft portion 18, and the engaging portion 14 in the fitted state of the distal end portion 20 and the insertion hole 13. It is formed so that it can be engaged oppositely. Further, a metal screw 23 is insert-molded on the shaft portion 18, and the metal screw 23 is partially protruded from the tip of the tip portion 20 constituting the shaft portion 18, and the protruding portion is used as a screw portion 24. The hook 16 is made of resin, but the strength of the screw portion is secured by using the metal screw 23.
[0017]
When the distal end portion 20 of the shaft portion 18 is fitted in the insertion hole 13 and the engaging portion 14 and the engaged portion 25 are engaged, the engaged portion A female thread-shaped threaded engagement provided on the retaining portion 26 is engaged with the threaded portion 24 at the opening position of the side hole 11 (hereinafter referred to as a side hole 11 ′) on the side opposite to the side where the joint 25 is located. The part 27 is screwed. The retaining portion 26 is provided with a groove 28 in which a coin or the like is fitted and rotated so as to be easily attached to and detached from the screwing portion 24. In order to secure the strength, it is preferable to insert-mold the metal nut into the retaining portion 26.
[0018]
When the retaining portion 26 is fixed to the shaft portion 18 as described above, the engaging portion 14 in the side hole 11 ′ of the hook holding portion 8 and the engaging portion 14 of the retaining portion 26 A spring 29, which is an elastic body, is compressed and disposed between the opposed portions. The urging force generated by the spring 29 urges the retaining portion 26 and the hook 16 integrally in the direction A in the drawing, whereby the engaged portion 25 is pressed against the engaging portion 14. I have. In other words, in one example, the surface of the retaining portion 26 that one end of the spring 29 contacts is the hook-side contact surface 30, and the surface of the engaging portion 14 that the other end of the spring 29 contacts is more axially than the hook-side contact surface 30. The holding portion-side contact surface 31 is located on the base side of the portion 18. A spring 29 compressed between the hook side contact surface 30 and the holding portion side contact surface 31 abuts the engaged portion 25 and the engaging portion 14 while applying a biasing force in the engagement direction. The urging means 32 serves as an urging means.
[0019]
In order to attach the hook 16 to the power tool main body 1, the shaft portion 18 of the hook 16 is inserted into the through hole 9 of the hook holding portion 8 from one side hole 11 side. In a state where the engaging portion 14 on the side hole portion 11 and the engaged portion 25 are engaged, a spring 29 is inserted into the other side hole portion 11 ′, and the spring 29 is connected to the hook holding portion 8. The retaining portion 26 may be screwed into the screwing portion 24 of the shaft portion 18 while being compressed. At this time, if the spring 29 moves so as to pierce the tip of the hook holding portion 8 in conjunction with the rotation of the retaining portion 26, there is a problem in the operation. Preferably, the tip is polished. When the fixing of the retaining portion 26 by screwing is completed, a predetermined interval D is formed between the retaining portion 26 and the hook holding portion 8.
[0020]
In the above-described mounting state of the hook 16, the engaging portion 14 and the engaged portion 25 are engaged while being urged by the urging force of the spring 29 in the direction of the engagement. Even if a rotational load is applied to the handle portion 17 of the hook 16, as long as the rotational load does not exceed a predetermined value, the hook 16 is locked to the power tool body 1 at that angle. . In addition, since the retaining portion 26 has an outer diameter that is larger than the opening diameter of the side hole 11, the hook 16 for hooking is reliably prevented from falling off from the power tool body 1. is there.
[0021]
When the rotational load applied to the handle portion 17 exceeds a predetermined value, the engagement between the engaging portion 14 and the engaged portion 25 is released against the urging force of the spring 29, and the engaged The part 25 rotates while climbing over the engaging part 14, and thereafter, the engaging part 14 and the engaged part 25 are engaged again in a different engagement state from before rotation by the urging force of the spring 29. Since the engaging portion 14 and the engaged portion 25 have a corrugated shape in which a large number of concavities and convexities are continuously provided in the circumferential direction, the hook 16 is positioned at multiple angles with respect to the power tool body 1. In this case, the engaging portion 14 and the engaged portion 25 can be engaged with each other in the corresponding meshing state to lock the hook 16 at that angle, and further, a rotational load of a predetermined value or more can be applied. If given, any other angle can be changed without problems by rotation. As shown in FIG. 2, when the angle of the hook 16 is changed, that is, when the engaging portion 14 gets over the engaged portion 25, the handle portion 17 is pushed out from the hook holding portion 8 to the side. At the same time, the retaining portion 26 is drawn into the hook holding portion 8 side. However, since the predetermined distance D between the retaining portion 26 and the hook retaining portion 8 is set to be equal to or longer than the movement interval of the retaining portion 26 at this time, the angle is Changes are made without any problems.
[0022]
That is, when the rotation load applied to the hook 16 is equal to or less than a predetermined value by the engaging portion 14, the engaged portion 25, the spring 29, and the like, the hook 16 is locked at that angle, In addition, when the rotation load applied to the hook 16 exceeds a predetermined value, an angle variable mechanism for rotating the hook 16 about the shaft 18 by releasing the lock is formed. The hook 16 can be locked at multiple angles at different angles. The predetermined value of the rotational load is easily determined during use of the hook 16 in consideration of the fact that a portable power tool to be actually used by being hooked on the waist belt is limited to a small one from the viewpoint of safety. It is sufficient that the angle is not changed.
[0023]
The rotation of the hook 16 around the shaft 18 is restricted within a range in which the rotation restricting rib 22 moves in the rotation restricting groove 15. For example, as shown in FIG. Position P, which is horizontal and whose leading end is in contact with the upper surface of the battery pack mounting portion 3b formed wide at the lower end of the main body housing 3 1 From the position P where the handle portion 17 is in a substantially vertical state. 2 Can be rotated within a range of approximately 90 degrees around the shaft portion 18. Position P 1 Is a storage position when the hook 16 is not used, and by keeping the handle portion 17 pressed against the main body housing 3 in this manner, concentration of a load near the shaft portion 18 is prevented. You. Further, since the hook holding portion 8 is formed above the connection surface S of the power tool main body 1 with the battery pack 2, the connection surface S is placed with the battery pack 2 removed as shown in FIG. When the electric tool main body 1 is placed on the surface 60, the electric power tool main body 1 can stand alone even when the hook 16 is attached to the hook holding portion 8 and the hook 16 is locked at any angle.
[0024]
Further, even when the hook 16 is attached to the hook holding portion 8 and locked at any angle, the hook 16 protrudes laterally from the battery pack mounting portion 3b of the main body housing 3 when viewed from above. It is formed not to be. Thus, even if the power tool body 1 is dropped, it is possible to prevent the impact from being directly transmitted to the hook 16 to cause breakage, and the portable electric tool is provided by mounting or not mounting the hook 16. The difference in dimensions that occurs in the overall dimensions of the tool is reduced, making it easier to share a storage case and the like.
[0025]
In addition, since the structure of the hook holding portion 8 is formed symmetrically to the left and right, the mounting direction of the hook 16 is not limited to the illustrated direction, and is opposite to the through hole 9, that is, in the illustrated case. The shaft portion 18 may be inserted from the side hole 11 ′ side, and the hook 16 may be attached to the left and right opposite sides. As a result, the operator can comfortably use either a right-handed person or a left-handed person.
[0026]
According to the portable power tool of the above-described example, the hook 16 set at an appropriate angle can be hooked on the waist belt. A position that does not interfere with the hook 16 (for example, the position P 1 ), The peripheral members will not be damaged or the working efficiency will not be reduced during the work, and the space for storage can be reduced. Further, in order to change the angle by rotating the hook 16 in this manner, it is easy to perform the work simply by applying a rotational load to the handle portion 17, and the structure itself for doing so is also required. There is an advantage that the size of a simple and portable power tool can be reduced as a whole.
[0027]
Next, another example of a portable power tool according to the embodiment of the present invention will be described. Since the basic configuration of the other example is substantially the same as that of the example, the common configuration is denoted by the same reference numeral and the description thereof will be omitted, and the characteristic configuration and operation and effect of the other example will be described in detail below. As shown in FIG. 8, in another example, the main body of the shaft portion 18 of the hook 16 for hooking is constituted by a columnar main body portion 33 and a polygonal columnar fitting portion 34 protruding from the tip thereof. ing. A mounting screw 36 is inserted into a screw hole 35 penetrating in the axial direction of the shaft portion 18, and a distal end portion of the mounting screw 36 projects from a distal end of the fitting portion 34 to form a screwing portion 38. The main body 33 is rotatably slidable by being fitted into the small-diameter insertion hole 13 in the through hole 9 of the hook holding portion 8, and is protruded from the side surface of the main body 33 in this fitted state. The rotation restricting rib 37 is adapted to rotate and slide in the rotation restricting groove 15.
[0028]
In another example of the retaining portion 26, a fitting portion 39 having a polygonal hole that extends around the threaded portion 27 and fits with the fitting portion 34 is formed. A corrugated engaged portion 40 having a large number of concavities and convexities arranged in the circumferential direction is protruded from the tip of the joining portion 39. Then, in a state where the main body portion 33 of the shaft portion 18 is fitted into the insertion hole 13, the retaining portion 26 is engaged with the fitting portion 34 of the shaft portion 18 in the side hole 11 ′ of the connection hole 9. The stopper portion 26 is fixed to the shaft portion 18 by fitting the screw portion 38 of the shaft portion 18 with the threaded portion 27 of the stopper portion 26 by fitting with the portion 39. The engaged portion 40 of the retaining portion 26 has a large number in the circumferential direction so as to be able to face and engage with the engaging portion 14 formed on the side hole 11 ′ side of the hook holding portion 8 in this fixed state. The corrugations are formed in a continuous wave shape.
[0029]
In the side hole 11 opposite to the side to which the retaining portion 26 is fixed, an elastic body is provided between the engagement portion 14 and a portion of the rotation restricting rib 22 opposed to the engagement portion 14. The spring 41 is provided in a compressed state. The urging force generated by the spring 41 is a force for urging the retaining portion 26 and the hook 16 integrally in the direction B in the drawing, whereby the engaged portion 40 is pressed against the engaging portion 14. Is engaged. That is, in another example, the surface of the rotation restricting rib 22 that one end of the spring 41 contacts is the hook-side contact surface 42, and the surface of the locking portion 14 that the other end of the spring 41 contacts is greater than the hook-side contact surface 42. The holding portion-side contact surface 43 is located on the distal end side of the shaft portion 18. A spring 41, which is compressed and disposed between the hook side contact surface 42 and the holding portion side contact surface 43, abuts the engaged portion 40 and the engaging portion 14 while applying a biasing force in the direction of engagement. The urging means 44 is another example of the urging means.
[0030]
In order to attach the hook for hook 16 to the power tool main body 1, the hook for hook 16 is held in a state where one end of the spring 41 is applied to the holding portion side contact surface 43 of the side hole 11 of the hook holding portion 8. The shaft portion 18 is inserted from the side hole portion 11 side, and the spring 41 is compressed between the hook side contact surface 42 and the holding portion side contact surface 43 while retaining the spring 41 on the other side hole portion 11 '. The fitting portion 34 of the shaft 18 is fitted into the fitted portion 39 of the portion 26, and the screwing portion 38 and the threaded portion 27 are screwed by turning the mounting screw 36 inserted into the screw hole 35. Good to let it.
[0031]
In the above mounting state of the hook 16, even if a rotational load is applied to the handle portion 17 of the hook 16, as long as the rotational load does not exceed a predetermined value, the angle of the hook 16 is the angle. The power tool main body 1 is locked as it is. When the rotational load applied to the handle portion 17 exceeds a predetermined value, the engagement between the engaging portion 14 and the engaged portion 40 is released against the urging force of the spring 41, and the The portion 40 rotates while climbing over the engaging portion 14, and thereafter the engaging portion 14 and the engaged portion 40 are engaged again in a different engagement state from before rotation by the urging force of the spring 41. Since the engaging portion 14 and the engaged portion 40 each have a corrugated shape in which a large number of concavities and convexities are continuously provided in the circumferential direction, when the hook 16 is positioned at a multi-step angle with respect to the power tool body 1. In addition, the engaging portion 14 and the engaged portion 40 can be engaged with each other in different engagement states to lock the hook 16 at that angle, and further, a rotational load of a predetermined value or more can be applied. If given, the lock is released and any other angle can be changed by rotation without any problem.
[0032]
In addition, as shown in FIG. 9, when the angle of the engaging portion 14 is over the engaged portion 40 and the angle is changed, the handle 17 is pulled inward of the hook holding portion 8 so that the hook Since the whole 16 is moved, the worker rotates the waist sideways while the hook 16 is hooked on the waist belt, and an external force is exerted to pull the handle portion 17 sideways. Also in this case, the angle of the hook 16 does not suddenly change.
[0033]
【The invention's effect】
As described above, according to the first aspect of the present invention, when a rotational load sufficient to release the engagement between the engaging portion and the engaged portion is applied against the urging force of the urging means, the load is applied. The stop hook can be rotated, and the angle can be easily changed by a one-touch operation only by applying a rotational load to the stop hook.
[0034]
According to the second aspect of the present invention, in addition to the effect of the first aspect, in conjunction with the rotation of the hook, the hook and the hook are rotated integrally with the hook. The movement of the member in the axial direction has an effect that the engagement between the engaging portion and the engaged portion can be smoothly released.
[0035]
According to the third aspect of the present invention, in addition to the effects of the first or second aspect, it is possible to rotate the hook for locking at multiple angles. There is an effect that the position of the hook for hooking can be variously changed according to the situation.
[0036]
According to the invention of claim 4, in addition to the effect of the invention of any of claims 1 to 3, the locking state of the hook for hooking between the hook for hooking and the hook holding portion. And an unlocked state can be operated.
[0037]
According to the invention of claim 5, in addition to the effect of the invention of claim 4, a direction in which the engaging portion and the engaged portion are engaged with the hook for hooking via the retaining portion. There is an effect that the urging force can be given.
[0038]
Further, in the invention according to claim 6, in addition to the effect of the invention according to any one of claims 1 to 3, the locking state of the hook for hooking between the retaining portion and the hook holding portion, There is an effect that the unlocked state can be operated.
[0039]
According to the invention of claim 7, in addition to the effect of the invention of claim 6, a direction in which the engaging portion and the engaged portion are engaged with the retaining portion via the hook for hooking. The direction in which the engagement between the engaging portion and the engaged portion is released against the biasing force is the direction in which the hook for hooking is pulled into the hook holding portion side. The angle of the hook for hooking is unexpected because the direction of the external force generated on the hook for hooking when the worker rotates the waist sideways while the hook for hooking is hooked on the waist belt. Is prevented from being changed.
[0040]
In the invention according to claim 8, in addition to the effect of the invention according to any one of claims 1 to 7, if the connection surface is placed on the ground or the like with the battery pack removed, the hook can be held. Even when the hook is attached to the portion and the hook is held at any angle, there is an effect that the power tool body alone can stand alone.
[Brief description of the drawings]
FIG. 1 is a horizontal sectional view showing a state in which a hook for a portable electric tool according to an embodiment of the present invention is locked.
FIG. 2 is a horizontal sectional view showing a state in which the angle of a hook in the portable electric power tool is being changed.
FIG. 3 is a partially exploded perspective view of the portable power tool.
FIG. 4 is an overall perspective view of the portable electric power tool.
FIG. 5 is an overall perspective view of the portable power tool with the main body housing partially removed.
FIG. 6 is an explanatory view showing a locking position of a hook in the portable electric tool according to the first embodiment.
FIG. 7 is an explanatory view showing a state in which the battery pack of the portable electric tool is removed and mounted.
FIG. 8 is a horizontal cross-sectional view showing a state in which a hook for a portable electric tool according to another embodiment of the present invention is locked.
FIG. 9 is a horizontal cross-sectional view showing a state in which the angle of the hook in the portable electric power tool is being changed.
FIG. 10 is an overall perspective view showing a conventional portable power tool.
FIG. 11 is an explanatory view showing a hook-locked state of the portable power tool of the above.
FIG. 12 is an explanatory diagram showing a hook angle changing state of the portable electric power tool.
[Explanation of symbols]
2 Battery pack
3 Body housing
8 Hook holder
14 Engagement part
16 Hook for hanging
18 Shaft
24 screw part
25 Engaged part
26 Retaining part
29 spring
30 Hook side contact surface
31 Holding part side contact surface
32 biasing means
41 Spring
42 Hook side contact surface
43 Holding part side contact surface
44 biasing means
S connection surface

Claims (8)

フック保持部を有する本体ハウジングと、軸部を有する掛止用フックと、掛止用フックの軸部をフック保持部内に挿入した状態でフック保持部内からの軸部の脱落を防止する抜け止め部とを備えた可搬式電動工具において、掛止用フックにかかる回転負荷が所定値以下の場合は該掛止用フックをその角度に係止させ、且つ、掛止用フックにかかる回転負荷が所定値を超える場合は係止解除により該掛止用フックを軸部中心に回転させる角度可変機構として、フック保持部に係合部を形成し、掛止用フック若しくは該掛止用フックと一体回転する部材に前記係合部と係合する被係合部を形成し、係合部と被係合部とをその係合方向に付勢力を与えながら当接させる付勢手段を設けたことを特徴とする可搬式電動工具。A main body housing having a hook holding portion, a hook having a shank, and a retaining portion for preventing the shank from dropping out of the hook holding portion with the shank of the hook hook inserted into the hook holding portion. When the rotational load applied to the hook is not more than a predetermined value, the hook is locked at that angle, and the rotational load applied to the hook is predetermined. If the value exceeds the value, an engaging portion is formed on the hook holding portion as an angle variable mechanism for rotating the hook for rotation around the shaft by unlocking, and the hook or the hook is integrally rotated. A member to be engaged with the engaging portion is formed on the member to be engaged, and biasing means for contacting the engaging portion and the engaged portion while applying a biasing force in the engaging direction is provided. Characteristic portable power tools. 係合部及び被係合部を、フック保持部に挿入される軸部の軸方向に向けて凹凸をなすように形成したことを特徴とする請求項1記載の可搬式電動工具。2. The portable power tool according to claim 1, wherein the engaging portion and the engaged portion are formed so as to be uneven in the axial direction of the shaft portion inserted into the hook holding portion. 係合部及び被係合部を、付勢手段の付勢力に抗して係合を解除して被係合部が係合部を乗り越えた後に、該付勢力により再度係合するように設けたことを特徴とする請求項1又は2記載の可搬式電動工具。The engaging portion and the engaged portion are provided so as to be engaged again by the urging force after the engaged portion is disengaged against the urging force of the urging means and the engaged portion has passed over the engaging portion. The portable power tool according to claim 1 or 2, wherein: 掛止用フックに被係合部を形成し、フック保持部の前記被係合部との対向箇所に係合部を形成したことを特徴とする請求項1〜3のいずれか記載の可搬式電動工具。The portable type according to any one of claims 1 to 3, wherein an engaged portion is formed on the hook for hooking, and an engaging portion is formed on a portion of the hook holding portion facing the engaged portion. Electric tool. 抜け止め部を軸部の先端側に固定し、抜け止め部に設けたフック側当て面と、前記フック側当て面よりも軸部の根元側に位置するようにフック保持部に設けた保持部側当て面との間に、弾性体を圧縮配設して付勢手段としたことを特徴とする請求項4記載の可搬式電動工具。The retaining portion is fixed to the distal end side of the shaft portion, and a hook-side contact surface provided on the retaining portion, and a holding portion provided on the hook holding portion so as to be located closer to the root of the shaft portion than the hook-side contact surface 5. The portable power tool according to claim 4, wherein an elastic body is compressed and disposed between the side contact surface and the urging means. 抜け止め部を軸部の先端側に固定し、掛止用フックと一体回転する部材である前記抜け止め部に被係合部を形成し、フック保持部の抜け止め部との対向箇所に係合部を形成したことを特徴とする請求項1〜3のいずれか記載の可搬式電動工具。The retaining portion is fixed to the distal end side of the shaft portion, and the engaged portion is formed on the retaining portion, which is a member that rotates integrally with the hook, and is engaged with the hook holding portion at a position facing the retaining portion. The portable power tool according to any one of claims 1 to 3, wherein a joining portion is formed. 掛止用フックに設けたフック側当て面と、前記フック側当て面よりも軸部の先端側に位置するようにフック保持部に設けた保持部側当て面との間に、弾性体を圧縮配設して付勢手段としたことを特徴とする請求項6記載の可搬式電動工具。The elastic body is compressed between a hook-side contact surface provided on the hook and a holding portion-side contact surface provided on the hook holding portion so as to be located on the tip end side of the shaft portion with respect to the hook-side contact surface. 7. The portable power tool according to claim 6, wherein the power tool is provided as an urging means. 本体ハウジングの下端部に動力源である電池パックを接続するものにおいて、フック保持部を、本体ハウジングの電池パックとの接続面よりも上方に形成したことを特徴とする請求項1〜7のいずれか記載の可搬式電動工具。8. The battery pack as a power source connected to a lower end of the main body housing, wherein the hook holding portion is formed above a connection surface of the main body housing with the battery pack. Or a portable power tool as described.
JP2002343033A 2002-11-26 2002-11-26 Portable power tool Withdrawn JP2004174646A (en)

Priority Applications (1)

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ID=32704930

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Country Link
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008062345A (en) * 2006-09-07 2008-03-21 Hitachi Koki Co Ltd Power tools
WO2009034880A1 (en) * 2007-09-14 2009-03-19 Makita Corporation Handle unit for hand type electric tool
JP2009196009A (en) * 2008-02-19 2009-09-03 Hitachi Koki Co Ltd Power tool
JP2011131377A (en) * 2011-03-29 2011-07-07 Makita Corp Hanging tool for rechargeable power tool
JP2013067006A (en) * 2012-12-17 2013-04-18 Makita Corp Battery-powered power tool
TWI403394B (en) * 2006-11-24 2013-08-01 Hitachi Koki Kk Power tool
US20240058938A1 (en) * 2020-12-29 2024-02-22 Hilti Aktiengesellschaft Hook Assembly for Power Tool

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008062345A (en) * 2006-09-07 2008-03-21 Hitachi Koki Co Ltd Power tools
TWI403394B (en) * 2006-11-24 2013-08-01 Hitachi Koki Kk Power tool
WO2009034880A1 (en) * 2007-09-14 2009-03-19 Makita Corporation Handle unit for hand type electric tool
JP2009083089A (en) * 2007-09-14 2009-04-23 Makita Corp Handle part of hand type electric tool
US8353364B2 (en) 2007-09-14 2013-01-15 Makita Corporation Handle portion of hand-held electric tool
US8596377B2 (en) 2007-09-14 2013-12-03 Makita Corporation Handle portion of hand-held electric tool
US9434063B2 (en) 2007-09-14 2016-09-06 Makita Corporation Handle portion of hand-held electric tool
EP2199033B2 (en) 2007-09-14 2022-08-24 Makita Corporation Hand-held electric tool
JP2009196009A (en) * 2008-02-19 2009-09-03 Hitachi Koki Co Ltd Power tool
JP2011131377A (en) * 2011-03-29 2011-07-07 Makita Corp Hanging tool for rechargeable power tool
JP2013067006A (en) * 2012-12-17 2013-04-18 Makita Corp Battery-powered power tool
US20240058938A1 (en) * 2020-12-29 2024-02-22 Hilti Aktiengesellschaft Hook Assembly for Power Tool

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