JP2004330323A

JP2004330323A - Domestic electric cutter grinding machine

Info

Publication number: JP2004330323A
Application number: JP2003126678A
Authority: JP
Inventors: Hiroshi Osada; 博史長田; Katsuya Tanaka; 勝也田中
Original assignee: Kaijirushi Hamono Center KK
Current assignee: Kaijirushi Hamono Center KK
Priority date: 2003-05-01
Filing date: 2003-05-01
Publication date: 2004-11-25
Anticipated expiration: 2023-05-01
Also published as: JP4302426B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric cutter grinding machine having a grinding wheel manufactured in a separate process from a housing and connected to a grinding machine body in a single operation or replaceable together with a box for easier cleaning, by enclosing the grinding wheel in the separate box to make it independent of the grinding machine body. <P>SOLUTION: In the electric cutter grinding machine with the disk-like grinding wheel mounted to a rotating shaft rotated by the power of a motor, the grinding machine body with the motor mounted in the housing, and the grinding wheel box internally mounted with a rotating shaft and the grinding wheel, are formed as separate bodies, and the grinding wheel box is connected to the grinding machine body through a transmission means for transmitting the power to the rotating shaft. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は家庭で包丁などの刃物を研ぐための電動刃物研ぎ機に関する。
【０００２】
【従来の技術】
従来の家庭用電動刃物研ぎ機は、ハウジングの中にモーターと砥石を内装し、モーターの原動軸に直結した回動軸に砥石が取り付けられている（例えば、特許文献１参照）。
【０００３】
【特許文献１】
特開平９−１３１６４９号公報
【０００４】
【発明が解決しようとする課題】
前述した従来の研ぎ機は、１つのハウジングの中にモーターと砥石を内装したものであるから、製造時に、まずハウジングの中にモーターや電気コードを取り付け、それを次の工程に移して砥石を取り付けている。したがって、製造工程のすべてにハウジングが付いて回るので、工程の移し変えに手間がかかっていた。また、砥石はハウジング内で一体的に結合されているから、砥石が古くなって磨耗したとき、あるいは種類の異なる砥石を使用するときに他の砥石と交換する作業が非常に煩雑であるか、あるいは砥石は交換できない構成であった。さらに、研ぎカスがハウジングの中に溜まったときに、そのカスを掃除するためにハウジングを分解して開けなければならず面倒であった。そこで本発明は、砥石を別のボックスに収納して研ぎ機本体から独立させることにより、砥石をハウジングと別の工程で製造してワンタッチで研ぎ機本体に結合でき、あるいは砥石をボックスごと交換可能にし、掃除も楽に行なえる電動刃物研ぎ機を提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明の請求項１は、ハウジング内にモーターが装着された研ぎ機本体と、回動軸と砥石を内装した砥石ボックスが別体に形成され、動力を回動軸に伝達するための伝達手段を介して砥石ボックスが研ぎ機本体に結合されている構成である。また、請求項２は、砥石ボックスは研ぎ機本体に着脱自在に取り付け可能であり、研ぎ機本体と砥石ボックスの間には動力を回動軸に伝達するための分離可能な伝達手段が存在している要素が請求項１に限定的に付加された構成である。請求項３は、回動軸は離れて２本存在し、回動軸にそれぞれ少なくとも１つの砥石が取り付けられている要素が請求項１又は請求項２に限定的に付加された構成である。
【０００６】
請求項４は、動力を回動軸に伝達するための手段が軸継手である要素が請求項１乃至請求項３に限定的に付加された構成である。請求項５は、軸継手が、原動軸継手と従動軸継手のいずれか一方が筒体で内面の軸方向に複数の溝が設けられ、他方の挿入体は外面軸方向に複数の歯が設けられ、それらの溝と歯が係合するスプライン軸継手である要素が請求項４に限定的に付加された構成である。請求項６は、筒体は４つの溝が十字形になるように設けられ、各溝の幅が挿入口付近で徐々に広がるように、各溝の内面は挿入口付近で隣りの溝の内面とテーパー面をなし、挿入体は十字形に４つの歯が設けられている要素が請求項５に限定的に付加された構成である。
【０００７】
請求項７は、研ぎ機本体の上面に砥石ボックスを装着するための凹所が設けられ、凹所は側壁と端壁で２面が囲まれており、端壁に設けられた孔を通して原動軸継手と砥石ボックスの従動軸継手が結合されている要素が請求項１乃至請求項６に限定的に付加された構成である。請求項８は、研ぎ機本体の上面と該研ぎ機本体に取り付けられた砥石ボックスの上面を同時に保護する単一の蓋が着脱自在に取り付けられている要素が請求項７に限定的に付加された構成である。
【０００８】
請求項９は、凹所の側壁及び装着時にその側壁に接する砥石ボックスの側面は共に端壁側の端部から反対側の端部に行くに従って、前記砥石ボックスの幅が広がる方向に弧状に曲がっている要素が請求項７又は請求項８に限定的に付加された構成であり、請求項１０は、装着時に凹所の側壁に接する砥石ボックスの側面にゴミ排出孔が設けられている要素が請求項７乃至請求項９に限定的に付加された構成である。
【０００９】
請求項１１は、砥石カバー部に刃物を挿し入れて研削するための挿入溝が設けられ、挿入溝は研ぎ機本体の上面に設けられた補助溝と連通している要素が請求項１乃至請求項１０に限定的に付加された構成である。請求項１２は、補助溝の幅は砥石ボックスの挿入溝の幅よりも広く形成され、且つ、両溝の一方の内面が面一であり、他方の内面がわにある研ぎ機本体の上面に段差が設けられ、この段差を境に砥石ボックス寄りでない上面が砥石ボックス寄りの上面よりも低く形成されている要素が請求項１１に限定的に付加された構成である。
【００１０】
請求項１３は、回動軸が２本存在し、挿入溝及び補助溝が２つの軸継手の間に延在している要素が請求項４乃至請求項１２に限定的に付加された構成である。
【００１１】
請求項１４は、砥石ボックスを凹所の側壁に沿って摺動させることにより研ぎ機本体に結合できるように、砥石ボックスと凹所のいずれか一方に一対のガイド溝が設けられ、他方に該ガイド溝内を摺動する一対の突部が設けられており、砥石ボックスを端壁に当るまで一杯に摺動させたときに砥石ボックスと凹所を連結する嵌合装置が設けられ、この嵌合装置は前記端壁と反対側の付近に存在し、且つ砥石ボックスの移動を規制するストッパーが設けられている要素が請求項７乃至請求項１３に限定的に付加された構成である。請求項１５は、一対のガイド溝は砥石ボックスの底面と凹所の底面のいずれか一方に設けられ、他方に該ガイド溝内を摺動する一対の突部が設けられており、嵌合装置は砥石ボックスの底面と凹所の底面に設けられている要素が請求項１４に限定的に付加された構成である。
【００１２】
請求項１６は、前記ストッパーがバネに支持されて凹所から弾性的に突出し没入可能であり、砥石ボックスを摺動させるときにストッパーを徐々に没入させるための傾斜面がストッパーと砥石ボックスの少なくとも一方に設けられ、砥石ボックスを端壁まで一杯に摺動させたときに、没入したストッパーを再び突出させる係止凹部が砥石ボックスに設けられている要素が請求項１４に限定的に付加された構成である。請求項１７は、ストッパーが凹所の底面から弾性的に突出し没入可能であり、没入したストッパーを再び突出させる係止凹部が砥石ボックスの底面に設けられている要素が請求項１６に限定的に付加された構成である。
【００１３】
【発明の効果】
本発明は以上の構成であって、請求項１は、研ぎ機本体と砥石ボックスが別体に形成され、動力を回動軸に伝達するための伝達手段を介して砥石ボックスが研ぎ機本体に結合されている。したがって、砥石ボックスと研ぎ機本体を別の工程で製造してワンタッチで結合することにより完成品とすることができるから、製造工程のすべてにハウジングが付いて回ることがなく、工程の移し変えに手間がかからない。また、請求項２は、砥石ボックスは研ぎ機本体に着脱自在に取り付け可能であり、研ぎ機本体と砥石ボックスの間には動力を回動軸に伝達するための分離可能な伝達手段が存在しているので、砥石を交換するときは砥石ボックスごとワンタッチで行なうことができる。請求項３は、回動軸が離れて２本存在し、回動軸にそれぞれ少なくとも１つの砥石が取り付けられている。したがって、包丁などの刃部を両側から研ぐので刃先のいずれの面にもバリがでることがなく、包丁を一方向に一度引くだけで研ぎ作業を終了できる。
【００１４】
請求項４は、動力を回動軸に伝達するための手段が軸継手であるから、高速回転を確実に伝達できる。請求項５は、軸継手が、原動軸継手と従動軸継手のいずれか一方が筒体で内面の軸方向に複数の溝が設けられ、他方の挿入体は外面軸方向に複数の歯が設けられ、それらの溝と歯が係合するスプライン軸継手であるから、軸継手の製造が比較的簡単で高速回転の伝達が確実であり、しかも振動の発生がわずかである。請求項６は、筒体は４つの溝が十字形になるように設けられ、各溝の幅が挿入口付近で徐々に広がるように、各溝の内面は挿入口付近で隣りの溝の内面とテーパー面をなし、挿入体は十字形に４つの歯が設けられている。したがって、筒体に挿入体を円滑に挿入することができると共に、回転時にガタつかないという効果を奏する。
【００１５】
請求項７は、研ぎ機本体の上面に砥石ボックスを装着するための凹所が設けられ、凹所は側壁と端壁で２面が囲まれており、端壁に設けられた孔を通して原動軸継手と砥石ボックスの従動軸継手が結合されている。したがって、砥石ボックスが凹所に装着されたときに、砥石ボックスは同時に側壁と端壁によって側面からも支持されるので、作業時に砥石ボックスがガタつくことを確実に防止できる。
【００１６】
請求項８は、研ぎ機本体の上面と該研ぎ機本体に取り付けられた砥石ボックスの上面を同時に保護する単一の蓋が着脱自在に取り付けられている。したがって、研ぎ機本体と砥石ボックスごとに蓋をする必要がないので、蓋の着脱に手間がかからない。
【００１７】
請求項９は、凹所の側壁及び装着時にその側壁に接する砥石ボックスの側面は共に端壁側の端部から反対側の端部に行くに従って、前記砥石ボックスの幅が広がる方向に弧状に曲がっている。したがって、砥石ボックスを凹所に装着する際に、正面部がわから端壁方向への砥石ボックスの移動が円滑である。請求項１０は、装着時に凹所の側壁に接する砥石ボックスの側面にゴミ排出孔が設けられているので、砥石ボックス内の研ぎカスを容易に排出できる。さらに砥石ボックスが装着された状態でゴミ排出孔は側壁に接して外部に表われないので体裁が良く、研ぎカスが飛び散ることもない。
【００１８】
請求項１１は、砥石カバー部に刃物を挿し入れて研削するための挿入溝が設けられ、挿入溝は研ぎ機本体の上面に設けられた補助溝と連通している。したがって、包丁の刃部は挿入溝と補助溝の両方に挿入されるから、実質的に挿入溝が長くなり作業時に包丁を安定的に支持できる。請求項１２は、補助溝の幅は砥石ボックスの挿入溝の幅よりも広く形成され、且つ、両溝の一方の内面が面一であり、他方の内面がわにある研ぎ機本体の上面に段差が設けられ、この段差を境に砥石ボックス寄りでない上面が砥石ボックス寄りの上面よりも低く形成されている。これにより、包丁の刃部を補助溝に挿入するときは、図１２においてまず右側の上面に包丁の刃先を宛がってから手前に引く。そして、包丁の刃部の顎が段差に当ったときに包丁をそのまま左側に移動すれば刃部は自然に補助溝に挿入されるから、刃部を容易に補助溝に挿入することができる。挿入溝と補助溝の一方の内面は面一であるから、その面に包丁の刃部を宛がって手前方向、すなわち正面部方向に引けば刃部を幅の狭い挿入溝に容易に挿入できる。請求項１３は、回動軸が２本存在し、挿入溝及び補助溝が２つの軸継手の間に延在しているので、研ぎ機全体の高さを低くできる。
【００１９】
請求項１４は、砥石ボックスを凹所の側壁に沿って摺動させることにより研ぎ機本体に結合できるように、砥石ボックスと凹所のいずれか一方に一対のガイド溝が設けられ、他方にガイド溝内を摺動する一対の突部が設けられており、砥石ボックスを端壁に当るまで一杯に摺動させたときに砥石ボックスと凹所を連結する嵌合装置が設けられ、この嵌合装置は前記端壁と反対側の付近に存在し、且つ砥石ボックスの移動を規制するストッパーが設けられている。したがって、ガイド溝と一対の突部の嵌合、及び端壁と反対側の付近の嵌合装置によって砥石ボックスは確実に固定され作業時のガタつきを防止できる。またストッパーにより砥石ボックスが移動しないから研ぎ機本体から外れる虞がない。
【００２０】
請求項１５は、一対のガイド溝は砥石ボックスの底面と凹所の底面のいずれか一方に設けられ、他方にガイド溝内を摺動する一対の突部が設けられており、嵌合装置は砥石ボックスの底面と凹所の底面に設けられている。したがって、砥石ボックスと研ぎ機本体の嵌合は砥石ボックスの底面と凹所の底面との間で行われて外部に表われないので体裁が良い。
【００２１】
請求項１６は、ストッパーがバネに支持されて凹所から弾性的に突出し没入可能であり、砥石ボックスを摺動させるときにストッパーを徐々に没入させるための傾斜面がストッパーと砥石ボックスの少なくとも一方に設けられ、砥石ボックスを端壁まで一杯に摺動させたときに、没入したストッパーを再び突出させる係止凹部が砥石ボックスに設けられている。したがって、砥石ボックスを装着するときに自動的にストッパーで係止できる。請求項１７は、ストッパーが凹所の底面から弾性的に突出し没入可能であり、没入したストッパーを突出させる係止凹部が砥石ボックスの底面に設けられている。したがって、ストッパーは上下に移動するので、砥石ボックスを研ぎ機本体から外すときに人差し指でノブを下に押すことになる。研ぎ機を置いた状態で人差し指を使ってノブを押す作業は下方の方向に押すことが最も自然で楽であるから、砥石ボックスを外す作業を円滑に行なうことができる。
【００２２】
【発明の実施の形態】
次に本発明の実施の形態を図面に従って説明する。この実施の形態は包丁用の研ぎ機である。研ぎ機は、図１に示す研ぎ機本体１と、図３に示す砥石ボックス２と、図１８に示す蓋３とから成る。砥石ボックス２は研ぎ機本体１に着脱自在に取り付けることができるように構成されている。砥石ボックスの砥石カバー部４を取り外した内部が図６及び図７に示されている。砥石ボックス２の内部には２本の回動軸５，６がそれぞれの端部を支持することにより装着されている。一方の回動軸５に第１砥石７と第３砥石８が固着され、他方の回動軸６に第２砥石９と第４砥石１０が固着されている。包丁を研ぐときは、最初に第１砥石７が刃部に当り、次に第２砥石９が刃部に当り、次に第３砥石８が刃部に当り、最後に第４砥石１０が当るように包丁を移動させて使用する。
【００２３】
各砥石７，８，９，１０は円柱状であり、砥石の平面部と研削面である周面のかどが面取りされて斜面１１に形成されている。第１砥石７と第２砥石９は同じ材料で形成され同じ粗さであって粒度が１２０番であり、荒研ぎをなす。第３砥石８と第４砥石１０はそれらよりも目が細かく粒度が１８０番であり、仕上げ研ぎをなす。第３砥石８と第４砥石１０は同じ材料である。本発明はこれに限定されることはなく、すべての砥石が異なり、第１砥石７から第４砥石１０まで順次砥石の目が細かく変化するものであっても差し支えない。また、砥石の形状は円柱状に限定されるものでなく、図８に示すように少なくとも一方の回動軸に取り付けられた砥石が円すい台状であっても差し支えない。この場合、大きい砥石１２と小さい砥石１３が用いられ、両砥石１２，１３の周面は１つの直線に沿って並んでいる。使用時には包丁の刃部が最初に大きい砥石１２に当り、次いで小さい砥石１３に当るように構成する。これにより、刃部の仕上げの段階で刃先角度をやや大きくして刃先の強度を増加させることができる。図７に示したように、左右の砥石は両回動軸５，６の中央でわずかに重なっている。わずかに重ねることによって、両側の砥石で構成されるほぼＶ字形の研削溝の底の角度が小さくなるので刃部を鋭利に研削できる。
【００２４】
図９は砥石を回動軸に取り付ける前の状態を示した図である。砥石７，８は回動軸５に直接取り付けるのでなく、中央が膨出したスリーブ１４の両端に砥石７，８を固着したものを製造する。そしてスリーブの孔１５に回動軸５を通して所定の位置で固着する。他方の回動軸６にもこれと同じ砥石付きスリーブ１４を所定の位置に固着する。したがって、同じ砥石付きスリーブを多数製造して適宜回動軸に固着することにより、効率的に砥石を回動軸に装着できる。
【００２５】
砥石ボックス２の上面には包丁の刃部を差し込んで移動させるための挿入溝１６が設けられている。図５は砥石カバー部４の内面、特に挿入溝１６の構成を明らかにしたものである。挿入溝１６は全長に亘って底が抜けているのではなく、挿入溝１６の両端付近に底面部１７，１８が設けられている。その間の部分は底が抜けており、細長孔１９が形成されている。符号２０、２１，２２，２３は底面部１７，１８まで届く凸壁であって、底面部１８と凸壁２１の間の空間部２４に第１砥石７が入り込み、凸壁２１と凸壁２３の間の空間部２５には第３砥石８が入り込み、凸壁２０と凸壁２２の間の空間部２６には第２砥石９が入り込み、凸壁２２と底面部１７の間の空間部２７には第４砥石１０が入り込む。したがって、各砥石の周面は挿入溝１６内の各空間部２４，２５，２６，２７に研ぐに必要なわずかな面を覗かせるだけなので、使用時に研ぎカスが周囲に飛び散る虞がなく各空間部から砥石ボックス２内に落ちる。砥石ボックス内の研ぎカスは排出孔３９から排出することができる。
【００２６】
砥石ボックス２の底面及び研ぎ機本体１の上面には、砥石ボックス２を研ぎ機本体１に着脱自在に且つ確実に装着するための係合装置が設けられている。図１に示すように研ぎ機本体１の上面に、砥石ボックス２を装着するための凹所２８が設けられている。凹所２８は側壁２９と端壁３０とで２面が囲まれている。図７に示すように側壁２９はこの図の下方に行くに従って左側に広がるように曲がっている。そして、この側壁２９の湾曲度に合わせて砥石ボックス２の一方の側面３１も曲がっている。したがって、側壁２９と砥石ボックスの一方の側面３１が密接し、端壁３０と砥石ボックスの端面３２が密接するので、砥石ボックス２は研ぎ機本体１にしっかりと固定され、使用時に砥石ボックス２がガタつくことがない。凹所２８の外側部付近の底面３３にガイド溝３４が設けられている。また、このガイド溝３４と対向するガイド溝が側壁２９を溝の底部とするように形成されている（図示せず。）。すなわち、対向するガイド溝は側壁２９にＬ形突片を一体に設けることにより形成される。図４に示すように、ガイド溝３４及びこれに対向するガイド溝に嵌合する突部３５，３５が砥石ボックス２の底面に設けられている。ガイド溝に突部３５，３５を嵌合するときは、端壁３０と砥石ボックスの端面３２の間をあけるようにして側壁２９に砥石ボックスの側面３１を宛がい、そのまま砥石ボックス２を端壁３０に当るまで押せばよい。
【００２７】
図１に示すように正面部３６寄りの凹所底面３３には一対の嵌合溝３７，３７が設けられ、図４に示すようにこれらの嵌合溝と嵌合する嵌合突起３８，３８が設けられ、砥石ボックス２が研ぎ機本体１に取り付けられたときに、嵌合突起３８，３８が嵌合溝３７，３７に嵌合して砥石ボックス２を強固に固定する。
【００２８】
符号４０は、装着された砥石ボックス２が正面方向に移動して外れることを防止するためのストッパーである。ストッパー４０は出没可能に弾性的に支持されており、図１１に示すストッパー装置４１と共に研ぎ機本体１に取り付けられている。符号４２は係止突部であって反対側にも設けられており、ストッパー装置４１を研ぎ機本体１に固定するためのものである。ストッパー４０はノブ４３と一体に形成されており両者の連結部がコイルバネ４４で弾性的に支持されている。したがって、ノブ４３を押し下げるとストッパー４０と共に弾性的に下降し、ストッパー４０は研ぎ機本体１内に没入する。ストッパー４０の上面は傾斜面に形成されている。したがって、砥石ボックス２を研ぎ機本体１に装着する場合に、砥石ボックス２が端壁３０に当るよりも前に、砥石ボックス２の底面に設けられた係止壁４５が傾斜面に当ってストッパー４０を押し下げて研ぎ機本体内に没入させる。そのまま砥石ボックス２を端壁３０方向に移動させて砥石ボックス２が端面３０当るときにストッパー４０は係止凹部４６内に弾性的に突き出る。そして、突き出たストッパー４０が係止壁４５に当って砥石ボックス２が移動することを防止する。砥石ボックス２を移動して研ぎ機本体１から外すときは、前述したようにノブ４３を押し下げてストッパー４０を没入させればよい。
【００２９】
研ぎ機本体のハウジング４７の中にモーター（図示せず。）が装着されており、種々の動力伝達装置を経て分離可能なスプライン軸継手により回動軸に動力が伝達される。図３に示すように、回動軸５，６の動力伝達側の端部にスプライン軸継手の挿入体４８，４８が取り付けられている。挿入体４８は４つの歯４９が十字形をなすように一体に設けられている。図２に示すように、この挿入体４８と連結する筒体５０，５０は研ぎ機１内に取り付けられており、筒体５０の内部に４つの溝５１が十字形をなすように設けられている。図１０に示すように各溝５１の内面は挿入口５２付近で隣りの溝の内面とテーパー面５３，５３をなしている。したがって、各溝の挿入口５２は広がるように形成されているから、筒体５０に挿入体４８を円滑に挿入できるから、砥石ボックス２を研ぎ機本体１に取り付ける作業が容易である。また、十字形をなす４つの溝５１内に挿入体の歯４９を挿入するスプライン軸継手であるから、結合部がほとんどガタつかず振動の発生を防止できる。
【００３０】
研ぎ機本体の上面５４に補助溝５５が形成されている。この補助溝５５は取り付けた砥石ボックスの挿入溝１６と連通する。図１２に示すように、補助溝５５と挿入溝１６が連通することによって実質的に溝が延長されるので、その長い溝に包丁の刃部が挿入したときに包丁を安定させることができる。図１に示すように補助溝５５の幅は挿入溝１６の幅よりも広く形成されている。しかし、補助溝５５の幅の広がりは対称でなく、図１において右側の内面のみが広がっている。したがって、左側の内面は砥石ボックスの挿入溝１６の内面と面一である。また、図１において補助溝５５を境として右側の上面５４は途中に段差５６を有していて、段差５６よりも正面部３６寄りの上面の高さは変わらないが、背面寄りの上面はそれよりも低く形成されている。これにより、包丁の刃部を補助溝５５に挿入するときは、まず右側の上面５４に包丁の刃先を宛がってから手前に引く。そして、包丁の刃部の顎が段差５６に当ったときに包丁をそのまま左側に移動すれば刃部は自然に補助溝５５に挿入されるから、刃部を容易に補助溝５５に挿入することができる。挿入溝１６と補助溝５５の一方の内面は面一であるから、その面に包丁の刃部を宛がって手前方向、すなわち正面部３６方向に引けば刃部を幅の狭い挿入溝１６に容易に挿入できる。このように、包丁は補助溝５５から挿入溝１６方向に移動して研削する。補助溝５５及び挿入溝１６は前述したスプライン軸継手の間に延在しているので、研ぎ機全体の高さを低くすることができる。なお、段差５６は図１及び図６に示すように正面部３６寄りに設けてもよく、図７、図１２及び図１５に示すようにそれよりも正面部３６から遠ざかる位置に設けてもよい。
【００３１】
次にモーターから回動軸５，６に動力を伝達する構成について説明する。図１３は研ぎ機本体１及びそれに取り付けられた砥石ボックス２の内部を示したものである。モーターは図示していないが、砥石７，８，９、１０の真下で研ぎ機本体１の底に取り付けられている。モーターの動力の伝達は後述するようにベルト伝動装置が使用されるが、研ぎ機本体１内のモーター及び回動軸５，６が装着されている空間と、ベルト伝動装置が取り付けられた空間とが、軸受板５７で仕切られている。
【００３２】
モーターから連なる原動軸５８は回動軸５，６と平行に延び、端部に原動歯車５９が取り付けられている。図１４に示すように、原動歯車５９の軸孔６６は一部が欠けた円形であり、原動軸５８も同様の形状にすることによって回動を確実に伝達できる。原動歯車５９の上方にそれよりも大きな第１歯車６０と第２歯車６１とが並んで取り付けられている。原動軸５８及び第１歯車６０と第２歯車６１は軸受板５７に支持されている。第１歯車６０は一体に回動する同軸の下方プーリー６２と共に取り付けられ、第２歯車６１は一体に回動する同軸の下方プーリー６３と共に取り付けられている。原動歯車５９は第１歯車６０と噛み合い、第２歯車６１は第１歯車６０と噛み合っている。したがって、原動歯車５９の動力はまず第１歯車６０に伝達され、次いで第２歯車６１に伝達される。
【００３３】
研ぎ機本体１の上端に近い位置に２つの上方プーリー６４，６５が軸受板５７に支持されて取り付けられている。図１４に示すように、上方プーリー６５のプーリー軸６７に２つの突起６８，６８が設けられ、上方プーリー６５の軸孔にその突起６８，６８を嵌め込む凹部６９，６９が設けられている。この構成によって上方プーリー６５の回動をプーリー軸６７に確実に伝達できる。他のプーリーも同様である。下方プーリー６２と上方プーリー６４の間、及び下方プーリー６３と上方プーリー６５の間には伝動ベルト７０，７１が掛け渡されて動力が伝達される。プーリー軸６７の砥石方向の端部には前述したスプライン軸継手の筒体５０が取り付けられている。この筒体５０と回動軸の挿入体４８が端壁３０に設けられた丸孔を介して連結することにより回動軸５が回動し、それと一体に第１砥石７及び第３砥石８が回動する。隣りの上方プーリー６４、回動軸６及び第２砥石９及び第４砥石１０も同様にして回動する。この構成による２つの回動軸５，６は反対方向に回動し、砥石が包丁の刃先をこすり上げる方向に回動する。本発明はこれに限定されるものでなく歯車を介在させる等の手段によって回動軸が同じ方向に回動する構成にしてもよいことは勿論である。
【００３４】
図１３に示すように、２つの上方プーリー６４，６５の間に空間が存在し、軸受板５７の上端中央に溝７２が設けられている。補助溝５５はこれらの空間及び溝７２の間に挿入されるので、研ぎ機全体の高さを低くすることができる。
【００３５】
次に、使用時に研ぎ機を固定するための把持部について説明する。図１２に示すように正面部３６が手前になるように研ぎ機をセットし、左手で把持部７３を包むようにして握る。図１５に示すように、把持部の側面７５はやや丸みを帯びていて、手の平にフィットするように形成されている。また、把持部７３の背面には凹状に湾曲した凹状端面７４が形成されている。把持部７３を手で包むように握ったときに、把持部７３からはみ出した指先を折り曲げて凹状端面７４に宛がって研ぎ機を固定する。このとき、親指は把持部７３の上面に自然に宛がわれ、親指を少し伸ばすことによってスイッチ７６を操作できるので取り扱い易い。把持部７３は研ぎ機の側方に張り出しており、ハウジング４７の一部として形成されている。
【００３６】
把持部７３の内部には、モーター及びこれに繋がった電気コード以外の電気装置が配置されている。例えば、交流モーターであるときはプラグ及びこれに繋がった電気コードを収納したり、直流モーターであるときは乾電池を収納したりする。また、スイッチ７６も配置されている。図１６は研ぎ機の底面を示しており、電気コード収納部の収納蓋７７が取り付けられ、使用時に電気コードを通す溝７８が設けられている。溝７８には爪７９，７９が一体に設けられており、コードを溝７８に確実に通して研ぎ機が浮き上がることを防止する。また、通孔８０を設けてあるからモーターの熱を放出することができる。収納蓋７７の隣りにも通孔８１が設けられているので通孔８０と通孔８１のいずれかが外気を吸い込む作用をなし、他方が加熱された空気を排出する作用をなすので研ぎ機の内部の空気が対流して冷却効果を高めることができる。
【００３７】
図１７及び図１８に示すように、研ぎ機の把持部７３以外の上面に蓋３を取り付けることができる。これは、図１２に示すように研ぎ機本体の上面５４の周囲の縁部８３、及び砥石ボックス２の周囲の縁部８４が連続するように構成したからである。
【図面の簡単な説明】
【図１】研ぎ機本体の斜視図
【図２】研ぎ機本体の内部の一部を表わした斜視図
【図３】砥石ボックスの斜視図
【図４】底面からみた砥石ボックスの斜視図
【図５】砥石カバー部の内面図
【図６】砥石カバー部を外した研ぎ機の斜視図
【図７】砥石カバー部を外した研ぎ機の平面図
【図８】砥石の実施例図
【図９】砥石とスリーブの斜視図
【図１０】筒体の正面図とＡ−Ａ断面図
【図１１】ストッパー装置の斜視図
【図１２】本発明の斜視図
【図１３】研ぎ機の内部を示す斜視図
【図１４】ベルト伝動装置の斜視図
【図１５】本発明の斜視図
【図１６】底面から見た本発明の斜視図
【図１７】蓋を装着した状態の正面図
【図１８】蓋を装着した状態の平面図
【符号の説明】
１研ぎ機本体
２砥石ボックス
３蓋
４砥石カバー部
５６回動軸
７第１砥石
８第３砥石
９第２砥石
１０第４砥石
１１斜面
１２大きい砥石
１３小さい砥石
１４スリーブ
１５スリーブの孔
１６挿入溝
１７底面部
１８底面部
１９細長孔
２０〜２３凸壁
２４〜２７空間部
２８凹所
２９側壁
３０端壁
３１砥石ボックスの側面
３２砥石ボックスの端面
３３底面
３４ガイド溝
３５突部
３６正面部
３７嵌合溝
３８嵌合突起
３９排出孔
４０ストッパー
４１ストッパー装置
４２係止突部
４３ノブ
４４コイルバネ
４５係止壁
４６係止凹部
４７ハウジング
４８挿入体
４９歯
５０筒体
５１溝
５２挿入口
５３テーパー面
５４上面
５５補助溝
５６段差
５７軸受板
５８原動軸
５９原動歯車
６０第１歯車
６１第２歯車
６２６３下方プーリー
６４６５上方プーリー
６６軸孔
６７プーリー軸
６８突起
６９凹部
７０７１伝動ベルト
７２溝
７３把持部
７４凹状端面
７５把持部の側面
７６スイッチ
７７収納蓋
７８溝
７９爪
８０８１通孔
８３縁部
８４縁部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric knife sharpening machine for sharpening a knife such as a kitchen knife at home.
[0002]
[Prior art]
2. Description of the Related Art In a conventional household electric sharpener, a motor and a grindstone are provided inside a housing, and the grindstone is attached to a rotating shaft directly connected to a driving shaft of the motor (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. Hei 9-131649
[Problems to be solved by the invention]
Since the conventional sharpening machine described above has a motor and a grinding wheel inside one housing, at the time of manufacturing, first install a motor and an electric cord in the housing, transfer it to the next process, and grind the grinding wheel. Attached. Therefore, since the housing is attached to all of the manufacturing processes, it has been troublesome to transfer the processes. In addition, since the grindstones are integrally joined in the housing, when the grindstones become old and worn, or when using a different kind of grindstone, it is very complicated to replace the grindstone with another grindstone, Or the whetstone was not replaceable. Further, when the shavings accumulate in the housing, the housing must be disassembled and opened in order to clean the shavings, which is troublesome. Therefore, the present invention can store the grindstone in a separate box and separate it from the sharpener body, so that the grindstone can be manufactured in a separate process from the housing and combined with the sharpener body with one touch, or the grindstone can be replaced with the entire box Another object of the present invention is to provide an electric knife sharpening machine that can easily perform cleaning.
[0005]
[Means for Solving the Problems]
According to a first aspect of the present invention, a sharpening machine body in which a motor is mounted in a housing, and a grinding wheel box containing a rotating shaft and a grinding wheel are formed separately, and a transmission means for transmitting power to the rotating shaft. The grinding stone box is connected to the sharpening machine main body via the. According to a second aspect of the present invention, the grindstone box can be detachably attached to the sharpener main body, and there is a separable transmission means for transmitting power to the rotating shaft between the sharpener main body and the grindstone box. This is a configuration in which the elements described are limitedly added to claim 1. Claim 3 is a configuration in which two rotating shafts are separated from each other, and an element in which at least one grindstone is attached to each of the rotating shafts is limitedly added to Claim 1 or Claim 2.
[0006]
A fourth aspect is a configuration in which the element for transmitting power to the rotating shaft is a shaft coupling, which is limitedly added to the first to third aspects. According to a fifth aspect of the present invention, one of the driving shaft coupling and the driven shaft coupling is a cylindrical body, and a plurality of grooves are provided in the inner surface in the axial direction, and the other insert is provided with a plurality of teeth in the outer surface axial direction. Further, an element which is a spline shaft coupling in which the grooves and the teeth are engaged is a configuration limitedly added to claim 4. According to a sixth aspect of the present invention, the cylindrical body is provided so that the four grooves are formed in a cross shape, and the inner surface of each groove is formed near the insertion opening so that the width of each groove gradually increases near the insertion opening. The insert has a configuration in which an element provided with four teeth in a cross shape is limitedly added to claim 5.
[0007]
According to a seventh aspect of the present invention, a recess is provided on the upper surface of the main body of the sharpening machine for mounting the grindstone box, and the recess has two sides surrounded by a side wall and an end wall. An element in which the joint and the driven shaft joint of the grindstone box are connected is a configuration that is limitedly added to claims 1 to 6. According to an eighth aspect of the present invention, an element in which a single lid for simultaneously protecting the upper surface of the sharpening machine main body and the upper surface of the grindstone box attached to the sharpening machine main body is detachably attached is added to the seventh embodiment. Configuration.
[0008]
According to a ninth aspect of the present invention, the side wall of the recess and the side surface of the grinding wheel box which is in contact with the side wall at the time of mounting are bent in an arc shape in a direction in which the width of the grinding wheel box increases as going from the end on the end wall side to the opposite end. The element having a dust discharge hole is provided on the side surface of the grindstone box which is in contact with the side wall of the recess at the time of mounting. This is a configuration limitedly added to claims 7 to 9.
[0009]
In the eleventh aspect, an insertion groove for inserting a cutting tool into the grinding wheel cover portion for grinding is provided, and the insertion groove communicates with an auxiliary groove provided on an upper surface of the sharpening machine body. This is a configuration limitedly added to the item 10. According to claim 12, the width of the auxiliary groove is formed wider than the width of the insertion groove of the grindstone box, and one inner surface of both grooves is flush with the upper surface of the sharpening machine main body where the other inner surface is aside. An element in which a step is provided, and an element whose upper surface not close to the grindstone box is formed lower than the upper surface close to the grindstone box at the boundary of this step is limitedly added to claim 11.
[0010]
A thirteenth aspect is a configuration in which two rotation shafts are present, and an element in which the insertion groove and the auxiliary groove extend between the two shaft couplings is limitedly added to the fourth to twelfth aspects. is there.
[0011]
Claim 14 provides a pair of guide grooves in one of the grindstone box and the recess and the other in the other so that the grindstone box can be coupled to the sharpener body by sliding along the side wall of the recess. A pair of protrusions are provided to slide in the guide groove, and a fitting device is provided for connecting the grindstone box and the recess when the grindstone box is fully slid until it hits the end wall. The joint device is configured so that an element which is present near the opposite side to the end wall and is provided with a stopper for restricting the movement of the grinding wheel box is added to the seventh to thirteenth embodiments. According to a fifteenth aspect, the pair of guide grooves are provided on one of the bottom surface of the grindstone box and the bottom surface of the recess, and the other is provided with a pair of protrusions that slide in the guide grooves. Is a configuration in which elements provided on the bottom surface of the grindstone box and the bottom surface of the recess are limitedly added to claim 14.
[0012]
According to a sixteenth aspect of the present invention, the stopper is supported by a spring and elastically protrudes from the recess so that the stopper can be immersed. When the grindstone box is slid, the inclined surface for gradually immersing the stopper is at least one of the stopper and the grindstone box. An element provided on one side and provided with a locking recess in the grinding wheel box for re-projecting the immersed stopper when the grinding box is fully slid to the end wall is limitedly added to claim 14. Configuration. According to a seventeenth aspect, the stopper is elastically protruded from the bottom surface of the recess so that it can be immersed, and an element in which a locking concave portion for projecting the immersed stopper again is provided on the bottom surface of the grindstone box is limited to the sixteenth aspect. This is an added configuration.
[0013]
【The invention's effect】
The present invention is configured as described above. According to claim 1, the sharpening machine main body and the grindstone box are formed separately, and the grindstone box is connected to the sharpening machine main body via a transmission means for transmitting power to the rotating shaft. Are combined. Therefore, it is possible to produce a finished product by manufacturing the grinding box and the sharpening machine main body in separate processes and connecting them with one touch, so that the entire manufacturing process does not come with a housing and can be relocated. It does not take time and effort. According to a second aspect of the present invention, the grindstone box can be detachably attached to the sharpener main body, and there is a separable transmission means for transmitting power to the rotating shaft between the sharpener main body and the grindstone box. Therefore, when replacing the grinding wheel, the grinding wheel box can be replaced with one touch. According to a third aspect of the present invention, there are two rotating shafts separated from each other, and at least one grindstone is attached to each of the rotating shafts. Therefore, since the blade portion of the kitchen knife or the like is sharpened from both sides, no burr is formed on any surface of the blade edge, and the sharpening operation can be completed by pulling the kitchen knife once in one direction.
[0014]
According to the fourth aspect, since the means for transmitting power to the rotating shaft is a shaft coupling, high-speed rotation can be transmitted reliably. According to a fifth aspect of the present invention, one of the driving shaft coupling and the driven shaft coupling is a cylindrical body, and a plurality of grooves are provided in the inner surface in the axial direction, and the other insert is provided with a plurality of teeth in the outer surface axial direction. In addition, since the spline shaft coupling engages the grooves and the teeth, the production of the shaft coupling is relatively simple, the transmission of high-speed rotation is reliable, and the generation of vibration is small. According to a sixth aspect of the present invention, the cylindrical body is provided so that the four grooves are formed in a cross shape, and the inner surface of each groove is formed near the insertion opening so that the width of each groove gradually increases near the insertion opening. And the insert has a cross-shaped four teeth. Therefore, it is possible to smoothly insert the insertion body into the cylindrical body, and it is possible to obtain an effect of preventing rattling during rotation.
[0015]
According to a seventh aspect of the present invention, a recess is provided on the upper surface of the main body of the sharpening machine for mounting a grindstone box, and the recess has two sides surrounded by a side wall and an end wall, and a driving shaft is provided through a hole provided in the end wall. The joint and the driven shaft joint of the grindstone box are connected. Therefore, when the grindstone box is mounted in the recess, the grindstone box is simultaneously supported from the side surface by the side wall and the end wall, so that it is possible to reliably prevent the grindstone box from rattling during operation.
[0016]
According to the eighth aspect, a single lid for simultaneously protecting the upper surface of the sharpener main body and the upper surface of the grindstone box attached to the sharpener main body is detachably attached. Therefore, since there is no need to cover each of the sharpening machine body and the grindstone box, it is not necessary to attach and detach the cover.
[0017]
According to a ninth aspect of the present invention, the side wall of the recess and the side surface of the grinding wheel box which is in contact with the side wall at the time of mounting are bent in an arc shape in a direction in which the width of the grinding wheel box increases as going from the end on the end wall side to the opposite end. ing. Therefore, when the grindstone box is mounted in the recess, the movement of the grindstone box from the front to the end wall direction is smooth. According to the tenth aspect, a dust discharge hole is provided on a side surface of the grinding wheel box which is in contact with the side wall of the recess at the time of mounting, so that the shavings in the grinding wheel box can be easily discharged. Further, the dust discharge hole is in contact with the side wall and is not exposed to the outside in a state where the grinding stone box is mounted, so that the appearance is good, and the shavings are not scattered.
[0018]
According to the eleventh aspect, an insertion groove is provided for inserting a cutting tool into the grindstone cover portion for grinding, and the insertion groove communicates with an auxiliary groove provided on the upper surface of the sharpener main body. Therefore, since the blade portion of the kitchen knife is inserted into both the insertion groove and the auxiliary groove, the insertion groove is substantially elongated, and the kitchen knife can be stably supported during work. According to claim 12, the width of the auxiliary groove is formed wider than the width of the insertion groove of the grindstone box, and one inner surface of both grooves is flush with the upper surface of the sharpening machine main body where the other inner surface is aside. A step is provided, and an upper surface that is not closer to the grindstone box is formed lower than an upper surface that is closer to the grindstone box. Thus, when inserting the blade portion of the kitchen knife into the auxiliary groove, the knife edge of the kitchen knife is first drawn to the upper surface on the right side in FIG. If the knife is moved to the left when the jaw of the blade of the knife hits the step, the blade is naturally inserted into the auxiliary groove, so that the blade can be easily inserted into the auxiliary groove. One of the inner surfaces of the insertion groove and the auxiliary groove is flush, so you can easily insert the blade into the narrow insertion groove if you direct the blade of the kitchen knife to that surface and pull it toward you, that is, toward the front. it can. According to the thirteenth aspect, since there are two rotating shafts and the insertion groove and the auxiliary groove extend between the two shaft couplings, the height of the entire sharpening machine can be reduced.
[0019]
According to another aspect of the present invention, one of the grindstone box and the recess is provided with a pair of guide grooves so that the grindstone box can be coupled to the sharpener body by sliding the grindstone box along the side wall of the recess. There is provided a pair of protrusions that slide in the groove, and a fitting device is provided for connecting the grindstone box and the recess when the grindstone box is fully slid until it hits the end wall. The device is located near the opposite side of the end wall and is provided with a stopper for restricting the movement of the grinding wheel box. Therefore, the grindstone box is securely fixed by the fitting device between the guide groove and the pair of protrusions and the fitting device near the side opposite to the end wall, thereby preventing rattling during operation. Further, since the whetstone box does not move due to the stopper, there is no danger of the whetstone box coming off the main body of the sharpening machine.
[0020]
According to a fifteenth aspect, the pair of guide grooves is provided on one of the bottom surface of the grindstone box and the bottom surface of the recess, and the other is provided with a pair of protrusions that slide in the guide grooves. It is provided on the bottom of the grindstone box and the bottom of the recess. Therefore, the fitting between the grindstone box and the main body of the sharpener is performed between the bottom surface of the grindstone box and the bottom surface of the concave portion, and is not exposed to the outside.
[0021]
According to a sixteenth aspect of the present invention, the stopper is supported by a spring and elastically protrudes from the recess so as to be immersable, and the inclined surface for gradually immersing the stopper when sliding the whetstone box is at least one of the stopper and the whetstone box. The grinding wheel box is provided with a locking recess for allowing the immersed stopper to protrude again when the grinding wheel box is fully slid to the end wall. Therefore, when the grindstone box is mounted, it can be automatically locked by the stopper. According to a seventeenth aspect, the stopper is elastically protrudable from the bottom surface of the recess and can be immersed, and a locking recess for projecting the immersed stopper is provided on the bottom surface of the grindstone box. Therefore, since the stopper moves up and down, the knob is pressed down with the index finger when the grindstone box is removed from the sharpener body. Pressing the knob with the index finger with the sharpener in the downward direction is most natural and easy to press in the downward direction, so the work of removing the grindstone box can be performed smoothly.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings. This embodiment is a sharpening machine for a kitchen knife. The sharpener comprises a sharpener body 1 shown in FIG. 1, a grindstone box 2 shown in FIG. 3, and a lid 3 shown in FIG. The grindstone box 2 is configured to be detachably attached to the sharpener main body 1. FIGS. 6 and 7 show the interior of the grindstone box with the grindstone cover 4 removed. Two rotating shafts 5 and 6 are mounted inside the grindstone box 2 by supporting respective ends thereof. A first grindstone 7 and a third grindstone 8 are fixed to one rotating shaft 5, and a second grindstone 9 and a fourth grindstone 10 are fixed to the other rotating shaft 6. When sharpening the knife, first the first grindstone 7 hits the blade portion, then the second grindstone 9 hits the blade portion, then the third grindstone 8 hits the blade portion, and finally the fourth grindstone 10 hits. Move the kitchen knife as shown.
[0023]
Each of the grindstones 7, 8, 9, and 10 has a columnar shape, and a flat portion of the grindstone and a corner of a peripheral surface serving as a grinding surface are chamfered to form a slope 11. The first grindstone 7 and the second grindstone 9 are formed of the same material, have the same roughness, a grain size of 120, and perform rough grinding. The third grindstone 8 and the fourth grindstone 10 are finer than those and have a grain size of No. 180, and perform finish sharpening. The third grindstone 8 and the fourth grindstone 10 are made of the same material. The present invention is not limited to this, and all the grindstones are different, and the grindstones may be finely changed sequentially from the first grindstone 7 to the fourth grindstone 10. Further, the shape of the grindstone is not limited to a columnar shape, and the grindstone attached to at least one of the rotating shafts may have a truncated cone shape as shown in FIG. In this case, a large grindstone 12 and a small grindstone 13 are used, and the peripheral surfaces of both grindstones 12 and 13 are arranged along one straight line. In use, the blade portion of the knife first strikes the large grindstone 12 and then strikes the small grindstone 13. This makes it possible to slightly increase the cutting edge angle in the finishing stage of the cutting portion to increase the strength of the cutting edge. As shown in FIG. 7, the left and right whetstones slightly overlap each other at the center of both rotating shafts 5 and 6. By slightly overlapping, the angle of the bottom of the substantially V-shaped grinding groove formed by the grinding stones on both sides becomes small, so that the blade portion can be sharply ground.
[0024]
FIG. 9 is a diagram showing a state before the grindstone is attached to the rotating shaft. The grindstones 7 and 8 are not directly attached to the rotating shaft 5, but are manufactured by fixing the grindstones 7 and 8 to both ends of a sleeve 14 whose center is bulged. Then, it is fixed at a predetermined position through the rotary shaft 5 through the hole 15 of the sleeve. A sleeve 14 with the same grindstone is fixed to a predetermined position on the other rotating shaft 6. Therefore, by manufacturing a large number of sleeves with the same grindstone and appropriately fixing the sleeve to the pivot, the grindstone can be efficiently attached to the pivot.
[0025]
An insertion groove 16 is provided on the upper surface of the whetstone box 2 for inserting and moving the blade of the kitchen knife. FIG. 5 clarifies the inner surface of the grindstone cover 4, in particular, the configuration of the insertion groove 16. The bottom of the insertion groove 16 does not extend over the entire length, but bottom surfaces 17 and 18 are provided near both ends of the insertion groove 16. A portion between them has a bottom, and an elongated hole 19 is formed. Reference numerals 20, 21, 22 and 23 are convex walls reaching the bottom portions 17 and 18, and the first grindstone 7 enters the space 24 between the bottom portion 18 and the convex wall 21, and the convex walls 21 and 23 The third grindstone 8 enters the space 25 between the convex walls 20 and the second grindstone 9 enters the space 26 between the convex walls 22 and the space 27 between the convex wall 22 and the bottom surface 17. , The fourth grinding stone 10 enters. Therefore, since the peripheral surface of each grindstone only allows a small surface necessary for sharpening in each of the spaces 24, 25, 26, and 27 in the insertion groove 16 to be sharpened, there is no danger that the shavings will scatter around during use. Part falls into the grindstone box 2. The shavings in the grindstone box can be discharged from the discharge hole 39.
[0026]
On the bottom surface of the grindstone box 2 and on the top surface of the sharpener main body 1, there are provided engaging devices for detachably and securely mounting the grindstone box 2 to the sharpener main body 1. As shown in FIG. 1, a recess 28 for mounting the grindstone box 2 is provided on the upper surface of the sharpener main body 1. The recess 28 is surrounded on two sides by a side wall 29 and an end wall 30. As shown in FIG. 7, the side wall 29 is bent so as to spread leftward as it goes down in the figure. The one side surface 31 of the whetstone box 2 is also bent in accordance with the degree of curvature of the side wall 29. Therefore, the side wall 29 and one side surface 31 of the grindstone box are in close contact, and the end wall 30 and the end surface 32 of the grindstone box are in close contact, so that the grindstone box 2 is firmly fixed to the sharpening machine main body 1 and the grindstone box 2 is used during use. There is no rattling. A guide groove 34 is provided on a bottom surface 33 near the outer portion of the recess 28. Further, a guide groove facing the guide groove 34 is formed so that the side wall 29 is the bottom of the groove (not shown). That is, the opposing guide grooves are formed by integrally providing the L-shaped protrusions on the side wall 29. As shown in FIG. 4, a guide groove 34 and protrusions 35, 35 fitted in the guide groove opposed thereto are provided on the bottom surface of the grindstone box 2. When fitting the projections 35, 35 into the guide grooves, the side wall 31 of the grinding wheel box is addressed to the side wall 29 so as to leave a gap between the end wall 30 and the end surface 32 of the grinding wheel box. Press it until you hit 30.
[0027]
As shown in FIG. 1, a pair of fitting grooves 37, 37 are provided on the concave bottom surface 33 near the front part 36, and fitting projections 38, 38 which fit into these fitting grooves as shown in FIG. When the grindstone box 2 is attached to the sharpening machine main body 1, the fitting projections 38, 38 fit into the fitting grooves 37, 37, thereby firmly fixing the grindstone box 2.
[0028]
Reference numeral 40 denotes a stopper for preventing the mounted grindstone box 2 from moving in the front direction and coming off. The stopper 40 is elastically supported so as to be able to protrude and retract, and is attached to the sharpening machine main body 1 together with a stopper device 41 shown in FIG. Reference numeral 42 denotes a locking projection, which is also provided on the opposite side, for fixing the stopper device 41 to the sharpening machine main body 1. The stopper 40 is formed integrally with the knob 43, and a connecting portion between the two is elastically supported by a coil spring 44. Therefore, when the knob 43 is depressed, it is elastically lowered together with the stopper 40, and the stopper 40 is immersed in the sharpener body 1. The upper surface of the stopper 40 is formed as an inclined surface. Therefore, when the grindstone box 2 is mounted on the sharpener main body 1, the stopper wall 45 provided on the bottom surface of the grindstone box 2 hits the inclined surface before the grindstone box 2 hits the end wall 30, and the stopper is used. Press down 40 to immerse in the sharpener body. When the whetstone box 2 is moved in the direction of the end wall 30 as it is and the whetstone box 2 hits the end face 30, the stopper 40 elastically protrudes into the locking recess 46. Then, the protruding stopper 40 prevents the grinding stone box 2 from moving against the locking wall 45. When the grindstone box 2 is moved and removed from the sharpener main body 1, the stopper 43 may be immersed by pushing down the knob 43 as described above.
[0029]
A motor (not shown) is mounted in the housing 47 of the sharpener main body, and power is transmitted to the rotating shaft by a separable spline joint through various power transmission devices. As shown in FIG. 3, spline shaft coupling inserts 48, 48 are attached to the ends of the rotation shafts 5, 6 on the power transmission side. The insert 48 is provided integrally so that the four teeth 49 form a cross. As shown in FIG. 2, the cylinders 50, 50 connected to the insert 48 are mounted inside the sharpening machine 1, and four grooves 51 are provided inside the cylinder 50 so as to form a cross. I have. As shown in FIG. 10, the inner surface of each groove 51 forms a tapered surface 53 with the inner surface of the adjacent groove near the insertion opening 52. Therefore, since the insertion opening 52 of each groove is formed so as to be widened, the insertion body 48 can be smoothly inserted into the cylindrical body 50, so that the work of attaching the grindstone box 2 to the sharpening machine main body 1 is easy. In addition, since the spline shaft joint inserts the teeth 49 of the insert into the four cross-shaped grooves 51, the joint portion hardly rattles, thereby preventing generation of vibration.
[0030]
An auxiliary groove 55 is formed in the upper surface 54 of the sharpener main body. This auxiliary groove 55 communicates with the insertion groove 16 of the attached grindstone box. As shown in FIG. 12, since the auxiliary groove 55 and the insertion groove 16 communicate with each other, the groove is substantially extended, so that the knife can be stabilized when the blade portion of the kitchen knife is inserted into the long groove. As shown in FIG. 1, the width of the auxiliary groove 55 is formed wider than the width of the insertion groove 16. However, the width of the auxiliary groove 55 is not symmetrical in width, and only the right inner surface in FIG. 1 is widened. Therefore, the inner surface on the left side is flush with the inner surface of the insertion groove 16 of the grindstone box. In FIG. 1, the upper surface 54 on the right side of the auxiliary groove 55 has a step 56 in the middle, and the height of the upper surface closer to the front portion 36 than the step 56 does not change. It is formed lower. Thus, when inserting the blade portion of the kitchen knife into the auxiliary groove 55, first, the blade edge of the kitchen knife is addressed to the upper surface 54 on the right side and then pulled toward the user. Then, when the knife of the knife portion of the knife hits the step 56, if the knife is moved to the left as it is, the blade portion is naturally inserted into the auxiliary groove 55, so that the blade portion can be easily inserted into the auxiliary groove 55. Can be. Since the inner surfaces of the insertion groove 16 and the auxiliary groove 55 are flush with each other, the blade portion of the kitchen knife is directed to that surface and pulled toward the front side, that is, toward the front portion 36, so that the blade portion becomes narrower. Can be inserted easily. Thus, the knife moves from the auxiliary groove 55 in the direction of the insertion groove 16 and grinds. Since the auxiliary groove 55 and the insertion groove 16 extend between the spline shaft couplings described above, the overall height of the sharpener can be reduced. The step 56 may be provided near the front portion 36 as shown in FIGS. 1 and 6, or may be provided at a position further away from the front portion 36 as shown in FIGS. 7, 12 and 15. .
[0031]
Next, a configuration for transmitting power from the motor to the rotating shafts 5 and 6 will be described. FIG. 13 shows the inside of the sharpener main body 1 and the grindstone box 2 attached thereto. The motor is not shown, but is attached to the bottom of the sharpener body 1 directly below the grindstones 7, 8, 9, and 10. As described later, a belt transmission is used to transmit the power of the motor. However, a space in which the motor and the rotating shafts 5 and 6 in the sharpening machine main body 1 are mounted, and a space in which the belt transmission is mounted are different. Are separated by a bearing plate 57.
[0032]
A driving shaft 58 connected to the motor extends parallel to the rotating shafts 5 and 6, and a driving gear 59 is attached to an end. As shown in FIG. 14, the shaft hole 66 of the driving gear 59 has a circular shape with a part missing, and the driving shaft 58 has the same shape so that rotation can be transmitted reliably. Above the driving gear 59, a first gear 60 and a second gear 61, which are larger than that, are mounted side by side. The driving shaft 58, the first gear 60 and the second gear 61 are supported by a bearing plate 57. The first gear 60 is mounted with a coaxial lower pulley 62 that rotates integrally, and the second gear 61 is mounted with a coaxial lower pulley 63 that rotates integrally. The driving gear 59 meshes with the first gear 60, and the second gear 61 meshes with the first gear 60. Therefore, the power of the driving gear 59 is first transmitted to the first gear 60, and then transmitted to the second gear 61.
[0033]
Two upper pulleys 64 and 65 are supported and mounted on a bearing plate 57 near the upper end of the sharpener main body 1. As shown in FIG. 14, two protrusions 68, 68 are provided on a pulley shaft 67 of the upper pulley 65, and concave portions 69, 69 for fitting the protrusions 68, 68 are provided in a shaft hole of the upper pulley 65. With this configuration, the rotation of the upper pulley 65 can be reliably transmitted to the pulley shaft 67. The same applies to other pulleys. Transmission belts 70 and 71 are stretched between the lower pulley 62 and the upper pulley 64 and between the lower pulley 63 and the upper pulley 65 to transmit power. At the end of the pulley shaft 67 in the grindstone direction, the above-described cylinder 50 of the spline shaft coupling is attached. The rotary shaft 5 is rotated by connecting the cylindrical body 50 and the insert 48 of the rotary shaft via a round hole provided in the end wall 30, and the first grindstone 7 and the third grindstone 8 are integrally formed therewith. Rotates. The adjacent upper pulley 64, the rotating shaft 6, the second grindstone 9, and the fourth grindstone 10 are similarly rotated. The two rotating shafts 5 and 6 having this configuration rotate in opposite directions, and rotate in a direction in which the grindstone rubs the cutting edge of the kitchen knife. The present invention is not limited to this, and it goes without saying that the rotating shaft may be rotated in the same direction by means such as interposing a gear.
[0034]
As shown in FIG. 13, a space exists between the two upper pulleys 64 and 65, and a groove 72 is provided at the center of the upper end of the bearing plate 57. Since the auxiliary groove 55 is inserted between the space and the groove 72, the height of the entire sharpening machine can be reduced.
[0035]
Next, a grip portion for fixing the sharpening machine at the time of use will be described. As shown in FIG. 12, the sharpening machine is set so that the front portion 36 is at the front, and the user grips the holding portion 73 with the left hand. As shown in FIG. 15, the side surface 75 of the grip portion is slightly rounded and formed so as to fit the palm of the hand. In addition, a concave end surface 74 that is concavely curved is formed on the back surface of the grip portion 73. When the grip 73 is wrapped by hand, the finger tip protruding from the grip 73 is bent to reach the concave end face 74 and the sharpening machine is fixed. At this time, the thumb is naturally addressed to the upper surface of the grip portion 73, and the switch 76 can be operated by slightly extending the thumb, so that the thumb is easy to handle. The grip 73 extends to the side of the sharpener and is formed as a part of the housing 47.
[0036]
An electric device other than the motor and the electric cord connected to the motor is arranged inside the grip portion 73. For example, a plug and an electric cord connected to the plug are stored when the motor is an AC motor, and a dry battery is stored when the motor is a DC motor. A switch 76 is also provided. FIG. 16 shows the bottom surface of the sharpening machine, in which a storage cover 77 of an electric cord storage section is attached, and a groove 78 through which the electric cord passes when used is provided. Grooves 78 are provided with claws 79, 79 integrally therewith to ensure that the cord passes through the grooves 78 to prevent the sharpener from floating. Further, since the through holes 80 are provided, the heat of the motor can be released. Since the through hole 81 is also provided adjacent to the storage lid 77, one of the through hole 80 and the through hole 81 has a function of sucking outside air, and the other has a function of discharging heated air. The air inside can be convected to enhance the cooling effect.
[0037]
As shown in FIGS. 17 and 18, the lid 3 can be attached to the upper surface of the sharpener other than the grip 73. This is because, as shown in FIG. 12, an edge 83 around the upper surface 54 of the sharpener main body and an edge 84 around the grindstone box 2 are configured to be continuous.
[Brief description of the drawings]
FIG. 1 is a perspective view of a sharpener main body. FIG. 2 is a perspective view showing a part of the inside of the sharpener main body. FIG. 3 is a perspective view of a grindstone box. FIG. 4 is a perspective view of a grindstone box viewed from the bottom. 5: Inside view of the grinding wheel cover part [Fig. 6] Perspective view of the sharpening machine with the grinding wheel cover removed [Fig. 7] Top view of the sharpening machine with the grinding wheel cover removed [Fig. 8] Example of grinding wheel [Fig. FIG. 10 is a perspective view of a grindstone and a sleeve. FIG. 10 is a front view of a cylinder and a cross-sectional view taken along line AA. FIG. 11 is a perspective view of a stopper device. FIG. 12 is a perspective view of the present invention. FIG. 14 is a perspective view of the belt transmission device. FIG. 15 is a perspective view of the present invention. FIG. 16 is a perspective view of the present invention viewed from the bottom. FIG. 17 is a front view of a state in which a lid is mounted. Plan view with lid attached [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sharpening machine main body 2 Grinding stone box 3 Lid 4 Grinding stone cover part 5 6 Rotating shaft 7 First grindstone 8 Third grindstone 9 Second grindstone 10 Fourth grindstone 11 Slope 12 Large grindstone 13 Small grindstone 14 Sleeve 15 Sleeve hole 16 Insert Groove 17 Bottom part 18 Bottom part 19 Slender hole 20 to 23 Convex wall 24 to 27 Space part 28 Concave part 29 Side wall 30 End wall 31 Side face of grindstone box 32 End face of grindstone box 33 Bottom surface 34 Guide groove 35 Projection 36 Front part 37 Fitting groove 38 Fitting projection 39 Discharge hole 40 Stopper 41 Stopper device 42 Locking projection 43 Knob 44 Coil spring 45 Locking wall 46 Locking recess 47 Housing 48 Insert body 49 Teeth 50 Cylindrical body 51 Groove 52 Insertion port 53 Tapered surface 54 Upper surface 55 Auxiliary groove 56 Step 57 Bearing plate 58 Driving shaft 59 Driving gear 60 First gear 61 Second gear 62 63 Lower pulley 6 65 upper pulley 66 shaft hole 67 the pulley shaft 68 projecting 69 recess 70 71 transmission belt 72 groove 73 grip portion side 76 switch 77 of the 74 recessed end surface 75 gripper housing cover 78 a groove 79 pawl 80 81 hole 83 edge 84 edge

Claims

An electric blade sharpening machine in which a disk-shaped grinding wheel is mounted on a rotating shaft that is rotated by the power of a motor. The sharpening machine main body has a motor mounted in a housing, a rotating shaft and a grinding wheel. An electric knife sharpening machine, wherein a grinding wheel box is formed separately, and the grinding wheel box is connected to a sharpening machine main body via a transmission means for transmitting power to a rotating shaft.

The grindstone box is detachably attachable to the sharpener main body, and there is a separable transmission means for transmitting power to the rotating shaft between the sharpener main body and the grindstone box. The electric knife sharpening machine according to claim 1.

The electric knife sharpening machine according to claim 1 or 2, wherein two rotating shafts are separated from each other, and at least one grindstone is attached to each of the rotating shafts.

4. An electric knife sharpening machine according to claim 1, wherein the means for transmitting power to the rotating shaft is a shaft coupling.

In the shaft coupling, one of the driving shaft coupling and the driven shaft coupling is a cylindrical body, and a plurality of grooves are provided in the inner surface in the axial direction, and the other insert is provided with a plurality of teeth in the outer surface axial direction, and the grooves are provided. The electric knife sharpening machine according to claim 4, which is a spline joint in which the teeth and the teeth are engaged.

The inner wall of each groove is tapered with the inner surface of the adjacent groove near the insertion port so that the width of each groove gradually increases near the insertion port. The electric knife sharpening machine according to claim 5, wherein the insert has four teeth in a cross shape.

A recess for mounting a grindstone box is provided on the upper surface of the sharpening machine main body. The recess has two sides surrounded by a side wall and an end wall, and a driving shaft coupling and a grindstone are formed through holes formed in the end wall. 7. The electric knife sharpening machine according to claim 1, wherein a driven shaft coupling of the box is connected.

8. The electric knife sharpener according to claim 7, wherein a single lid for simultaneously protecting the upper surface of the sharpener main body and the upper surface of the grindstone box attached to the sharpener main body is detachably attached.

8. The side wall of the recess and the side surface of the whetstone box which is in contact with the side wall at the time of mounting are bent in an arc shape in a direction in which the width of the whetstone box increases from the end on the end wall side to the end on the opposite side. Or the electric knife sharpening machine according to claim 8.

The electric knife sharpening machine according to claim 7, wherein a dust discharge hole is provided on a side surface of the whetstone box which is in contact with a side wall of the recess at the time of mounting.

The grindstone box has a grindstone cover portion that covers the grindstone from above, and the grindstone cover portion is provided with an insertion groove for inserting and grinding a cutting tool, and the insertion groove is provided on an upper surface of the sharpening machine main body. The electric knife sharpening machine according to claim 1, which is in communication with the auxiliary groove.

The width of the auxiliary groove is formed wider than the width of the insertion groove of the grindstone box, and one inner surface of both grooves is flush, and the other inner surface is provided with a step on the upper surface of the sharpening machine main body, 12. The electric knife sharpening machine according to claim 11, wherein an upper surface which is not closer to the whetstone box is formed lower than an upper surface which is closer to the whetstone box.

13. The electric knife sharpening machine according to claim 4, wherein there are two rotating shafts, and the insertion groove and the auxiliary groove extend between the two shaft couplings.

One of the whetstone box and the recess is provided with a pair of guide grooves, and the other slides in the guide groove so that the whetstone box can be coupled to the sharpener body by sliding along the side wall of the recess. A pair of moving projections, and a fitting device for connecting the grindstone box and the recess when the grindstone box is fully slid until the grindstone box hits the end wall is provided. 14. The electric blade sharpening machine according to claim 7, wherein a stopper is provided near the side opposite to the wall and restricts movement of the whetstone box.

The pair of guide grooves are provided on one of the bottom surface of the grindstone box and the bottom surface of the recess, and the other is provided with a pair of protrusions that slide in the guide grooves. The electric knife sharpening machine according to claim 14, which is provided on a bottom surface of the recess and the recess.

The stopper is supported by a spring and elastically protrudes from the recess so that it can be immersed, and an inclined surface for gradually immersing the stopper when sliding the whetstone box is provided on at least one of the stopper and the whetstone box, 15. The electric knife sharpening machine according to claim 14, wherein a locking recess is provided in the grinding wheel box for projecting the immersed stopper again when the grinding wheel box is fully slid to the end wall.

17. The electric blade sharpening machine according to claim 16, wherein the stopper is elastically protrudable from the bottom surface of the concave portion and is immersible, and a locking concave portion for re-protruding the immersed stopper is provided on the bottom surface of the grindstone box.