JP3691126B2

JP3691126B2 - Hose for vacuum cleaner and its manufacturing method

Info

Publication number: JP3691126B2
Application number: JP22457495A
Authority: JP
Inventors: 昭彦雑古; 和雄斉藤; 利造小林; 秀一樋口; 満西澤; 敬一佐藤; 俊行藤吉
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 1995-08-10
Filing date: 1995-08-10
Publication date: 2005-08-31
Anticipated expiration: 2015-08-10
Also published as: JPH0947408A

Description

【０００１】
【発明の属する技術分野】
本発明は可撓性ホースが嵌合するホースジョイント部の構造及び可撓性ホースとホースジョイント部の接続構造を改良した電気掃除機用ホースとその製造方法に関する。
【０００２】
【従来の技術】
図１１に示すように、一般に電気掃除機は、本体１にホース２と延長パイプ３とが接続され、更に先端部に床ブラシ等の掃除用品４が適宜取り付けられて構成される。また、その電気掃除機用のホース２は、可撓性ホース５の両端部に、本体１の吸気口６に接離可能に嵌合される本体側ホースジョイント部７と、延長パイプ３が接続される手元側ホースジョイント部８がそれぞれ接続されて構成される。
【０００３】
その可撓性ホース５を、従来は図１２に示すように、絶縁被覆した導電線９と鋼線１０とを一緒にして螺旋状に巻回し、その上に、塩化ビニールのような軟質材１１で被覆して構成していた。また、この可撓性ホース５が嵌合固定されるホースジョイント例えば本体側ホースジョイント部７は、図１３に示すように、可撓性ホース５が抜け落ちないように嵌合面外周の適宜の個所に突起部１２を形成しただけの構成であった。そして、図１４に示すように、本体側ホースジョイント部７のホース接続側管端部の外周面に接着剤を塗布して可撓性ホース５を嵌合固着し、リブ１３、１４を利用してカバー１５を取り付け、更に本体１の吸気口６に嵌合する本体側ホースジョイント部７を係合、解除するための係止爪１６を有する操作釦１７を取付部１９に取り付けてホース２端部を構成していた。
【０００４】
【発明が解決しようとする課題】
このように、従来は、導電線９と鋼線１０とを一緒にして螺旋状に巻回し、その上に、塩化ビニールのような軟質材１１で被覆した可撓性ホース５により電気掃除機用ホース２を構成していたため、可撓性ホース５の本体側ホースジョイント部７への嵌合固定は容易になるものの、可撓性ホース５はいったん変形するともとの状態に復元するのが困難で、外管が見苦しくなる上、吸引力が落ちて塵が詰まりやすくなる問題があった。
【０００５】
このような点を改善るため、導電線と凹凸状の溝を螺旋状に形成したポリエチレン製の管で可撓性ホース５を形成し、鋼線を用いることなく構成した電気掃除機用ホース２も知られている。
【０００６】
しかし、そのような凹凸溝を有する可撓性ホース５の場合は、本体側ホースジョイント部７及び手元側ホースジョイント部８の管端部に取り付ける際の接着面積が減少して抜けやすくなる上、その凹凸溝を介して外部空気が管中に侵入し、せっかく本体１の吸引力を高めても効果が現れず、近年における電気掃除機のハイパワー化要求に対応できない問題点があった。
【０００７】
本発明は、上記問題点を解決して、可撓性ホースとホースジョイント部との接続部のシール性能を改善する電気掃除機のホースとその製造方法を提供することを目的とする。
【０００８】
【課題を解決するための手段】
請求項１記載の発明は、可撓性ホースの端部にホースジョイント部が嵌合接続されて成る電気掃除機用ホースにおいて、前記ホースジョイント部は、可撓性ホースが嵌合する面に、可撓性ホースに嵌合する凸条部を形成すると共に、前記可撓性ホースの端部が接着剤を介してホースジョイント部に嵌合固定されており、前記ホースジョイント部の外周面には、フランジ部を形成すると共に、前記ホースジョイント部の外周面の前記フランジ部が形成される前記可撓性ホース側根元には、可撓性ホースの嵌入と共に前記フランジ部側へ押し出される接着剤の余剰部分を吸収し、接着剤の不足した部分に回り込ませる前記接着剤たまり凹部を形成したことを特徴とする。
【００１１】
請求項２記載の発明は、可撓性ホースの端部にホースジョイント部が嵌合接続されて成る電気掃除機用ホースを製造する方法において、可撓性樹脂材の押し出し成型により導電線を埋設した凹凸状の帯を連続的に形成し、その帯の辺部分を互いに接着しながら螺旋状に巻回して導電線と凹凸状の溝が螺旋状に形成された所定長の可撓性ホースを形成し、その可撓性ホースの端部をそれぞれ熱溶融して前記可撓性ホース両端部の凹凸溝を無くして略平らに形成する一方、前記ホースジョイント部の端部外周面には、前記可撓性ホースを固定するため前記可撓性ホース内面に形成される溝に沿った傾斜を有する突起を離散的に形成すると共に、前記可撓性ホース端面が当接するフランジ部を形成し、前記端部外周面に接着剤を塗布した上、前記可撓性ホースを嵌合し、そのホース端部を前記フランジ部に当接させ固定することを特徴とする。
【００１２】
請求項３記載の発明は、可撓性ホースの端部にホースジョイント部が嵌合接続されて成る電気掃除機用ホースを製造する方法において、可撓性樹脂材の押し出し成型により導電線を埋設した凹凸状の帯を連続的に形成し、その帯の辺部分を互いに接着しながら螺旋状に巻回して導電線と凹凸状の溝が螺旋状に形成された所定長の可撓性ホースを形成し、その可撓性ホースの端部をそれぞれ熱溶融して前記可撓性ホース両端部の凹凸溝を無くして略平らに形成する一方、前記ホースジョイント部の端部外周面には、前記可撓性ホースを固定するため前記可撓性ホース内面に形成される溝に沿った傾斜を有する突起を離散的に形成すると共に、前記可撓性ホース端面が当接するフランジ部を形成し、そのフランジ部のホース接続側に軟質弾性体を接着した上、前記可撓性ホースを嵌合し、そのホース端部を前記弾性体を介して前記フランジ部に当接させ固定することを特徴とする。
【００１３】
【発明の実施の形態】
図１は、本発明の実施形態の一例を示し、電気掃除機用ホースを構成する可撓性ホース３１は、ポリエチレン製の樹脂管に導電線３２と内面が溝３３に形成された凹凸条部とが螺旋状に形成されてなるもので、この可撓性ホース３１は、以下のようにして製造される。
【００１４】
即ち先ず、ポリエチレン樹脂に導電線３２を埋設しながら溝３３を押し出し成型により連続的に形成して、電気掃除機本体と手元操作スイッチとの間を往復する２本の導電線３２を埋設すると共に、溝３３を設けた帯３４を形成する。
【００１５】
次に、その帯３４の辺部分を接着剤等を用いて互いに接着しながら螺旋状に巻回して導電線３２と溝３３が螺旋状に形成された管を形成する。この帯３４の辺部分の接合により、その接合部３５には管内面に細溝が形成される。また、この管の表面には図１に示すように、接合部３５に対応する凸条部３５'、往復２本の導電線３２の埋設部に対応する凸条部３２'、内面の溝３３部分に対応するやや幅広の凸条部３３’が形成される。このようにして形成されるホース管を所望の長さに切断して、その切り口のホース管端面３６を電気加熱器４１で加熱溶融する。
【００１６】
この電気加熱器４１は、ホース管内部に嵌合する嵌合部４２の端部に鍔部４３を備え、その鍔部４３内部には、外部の商用電源４４に接続されるヒータ線が配設されたもので、ホース管に接触する金属表面部分にはフッ素加工が施されている。
【００１７】
この電気加熱器４１の嵌合部４２に先の所定長に切断したホース管を、その端面３６が鍔部４３に接触するまで嵌入する。これによりホース管端面３６は、図２（Ａ）に示すように、熱溶融して凹凸条部が潰れて管内に繋がる空気通路を遮断するように閉塞部３８が形成される。この場合、電気加熱器４１の嵌合部４２部分にもヒータを内蔵させ、ホース管端面に限らずホース管端面から多少管内面に入り込んだ部分も熱溶融して凹凸条部をつぶし平らに仕上げても良く、そうした場合には後述するホースジョイント接合面との接合面積が増してより強固な接合が得られる。
【００１８】
このとき、図２（Ｂ）に示すように、２本の導電線３２ａ、３２ｂは、埋設した部分の樹脂の外皮を破くなどしてあらかじめホース管端面手前から引き出しておくと良い。電気掃除機用ホースの可撓性ホース３１部分はこのようにして構成される。
【００１９】
一方、図３（Ａ）の上面図、（Ｂ）の側面図、（Ｃ）のＺ部拡大図に示すように、ホースジョイント部例えば本体側ホースジョイント部５１は、可撓性ホース３１が嵌合する面に、ホース管内面に形成される溝３３と同じ傾きを有する凸条部５２が形成されている。この凸条部５２は可撓性ホース３１がねじ込みやすいように離散的に形成されると共にその端部５２ａには管面から立ち上がるテーパが付けられている。
【００２０】
更に、本体側ホースジョイント部５１の嵌合面には端面が当接するフランジ状のリブ５３が形成されると共に、そのリブ５３のホース接続側根本には後述する接着剤たまりとなる凹部５４が形成されている。操作釦取付部５５等それ以外の構成は従来と変わらない。
【００２１】
このような構成の本体側ホースジョイント部５１のホース接続側管外周面に接着剤を塗布し、そこに可撓性ホース３１を回動させながら押し込んで行く。これにより凸条部５２は内面に形成されている溝３３に嵌合し、その後は可撓性ホース３１を回転することによりリブ５３方向に順次嵌入されて行き、図４の要部断面図、及び、図５の上面図に示すように、ホース管面に形成された閉塞部３８がリブ５３に当接した状態で可撓性ホース３１とリブ５３が嵌合接続される。
【００２２】
このとき管面に塗布した接着剤は可撓性ホース３１の嵌入と共に、余剰部分がリブ５３側に押し出される。もしリブ５３の根本に凹部５４が形成されていなければ、可撓性ホース３１の端面がリブ５３に当接したときには、接着剤の余剰部分が接合部表面に溢れ出て作業者の手に着き作業の妨げになるが、この凹部５４の形成により余剰接着剤は表面に溢れ出ることなく凹部５４内に吸収されると共に、凹部５４内に溜まった余剰接着剤が接着剤の不足した部分に回り込んで充填される。
【００２３】
このように、可撓性ホース３１の溝３３には本体側ホースジョイント部５１の凸条部５２が嵌合されると共に、ホース管端面の閉塞部３８はリブ５３に接合してしっかりと嵌合固定される。この後、２本の導電線３２ａ、３２ｂと本体側ホースジョイント部５１に形成される電気的接続ピン５８ａ，５８ｂに接続されるリード線とを接続し、リブ５３と操作釦取付部５５との間隙に収容する。その間隙には、２本の導電線接続部が互いに接触しないように仕切リブ５９が形成されている。さらに、この可撓性ホース３１と本体側ホースジョイント部５１との接合面の上にはホースカバー６１が装着される一方、操作釦取付部５５には本体に形成されている吸気口に係合、解除するための係止爪５６を有する操作釦５７が取付られて可撓性ホース３１と本体側ホースジョイント部５１との接合が完了する。また、可撓性ホース３１と手元側ホースジョイント部との接合も上述同様に行われて電気掃除機用ホースが得られる。
【００２４】
ところで、最近の電気掃除機本体部のパワーアップに対応して、可撓性ホース３１と本体側ホースジョイント部５１の接合部のシールをより完全なものとするため、可撓性ホース３１を本体側ホースジョイント部５１に嵌入する前に、リブ５３根元のホース接続側にはスポンジ状の軟質の弾性部材７１を巻回しておく。あるいはウレタン製の１〜２ｃｍの厚みのシートをリブ５３形状に合わせてドーナツ状に切り抜いて形成した弾性部材７１をリブ５３のホース接続側表面に接着しておくようにしても良い。その弾性部材７１を付着した本体側ホースジョイント部５１の先端部に先の場合と同様にして可撓性ホース３１を嵌入していき、ホース管端面の閉塞部３８をリブ５３側に強く押し付ける。この結果、図６に示すように、弾性部材７１は押し潰された状態で、閉塞部３８とリブ５３間に挿設され、これにより連続する溝３３、３５を介しての空気の流通はより完全に遮断され、極めてシール性能の良い電気掃除機用ホースが得られる。
【００２５】
図７は、電気掃除機用ホースの手元側ホースジョイント部に接続される延長パイプ８１の説明図で、（Ａ）はその上面図、（Ｂ）は側面図、(Ｃ）はパイプ上面に配設されているカバー８２を取り外した上面図である。即ち、パワーブラシを備えた電気掃除機においては、パワーブラシモータに本体側から給電する必要があり、そのために、延長パイプ８１の一端部には手元側ホースジョイント部に電気接続するための接続ピン８３、他端部にはパワーブラシ側の接続ピンと接続するための受け口８４が配設されると共に、それら接続ピン８３と受け口８４を結んで給電線８５が通気路８６上に配設されている。
【００２６】
図８は、図７（Ｃ）の延長パイプ８１の一端部を拡大して示した図であり、図９は、図８のＡ−Ａ断面図である。また、図１０は、受け口８４の詳細図で、（Ａ）は上面図、（Ｂ）はＢーＢ断面図である。これらの図から明らかなように、この受け口８４は、挿入される接続ピンに接触する導電性弾性金属板で形成される２枚の切片８４ａと、それら切片８４ａと根元部で接合する平板状の端子板８４ｂと、その平板状の端子板８４ｂに穴を穿設して筒を形成したボス８４ｃと、その手前の平板状の端子板８４ｂから立ち上がって切片８４ａに固定される挿入ピンの当接壁８４ｄとからなり、更にその後部には給電線を接続保持するため両側部に把持片を有する可塑性金属板で形成された給電線接続保持部８５ｅが接続されて構成されている。
【００２７】
この受け口８４は、図９に示すように、通気路８６上面に形成される円柱状のリブ８６ａに筒状のボス８４ｃが嵌合されて取り付けられる。このボス８４ｃは根元にＲが形成されている。これにより、パワーブラシ着脱時における応力集中を緩和して受け口８４の寿命を延ばすことができる。即ち、パワーブラシの繰り返し着脱による接続ピンの挿入取り外しの繰り返しにより、受け口８４に繰り返し加わる接続ピン挿入の前後方向に沿った力によりボス８４ｃには応力が集中する。しかし、本発明では、平板状の端子板８４ｂに筒状のボス８４ｃを形成してリブ８６ａに嵌合固定していることにより、受け口８４の耐久性を増すことができ、更にそのボス８４ｃの根元にＲ面を形成しているので、繰り返し着脱による応力集中を軽減して破損を防止し、さらには受け口８４の固定を確実して長寿命化することができる。
【００２８】
【発明の効果】
請求項１に係わる発明によれば、ホースジョイント部の外周面のフランジ部の可撓性ホース側根元部には、接着剤たまり凹部が形成されていることにより、ホースジョイント部にホースを嵌合固定する際に、接着剤がその凹部に吸収されてホースジョイント部表面に溢れ出すことが無くなり、作業性が改善されると共に、接着剤の不足した部分に接着剤を回り込ませることができ、気密性の良い電気掃除機用ホースを得ることができる。
【００３１】
請求項２に係わる発明によれば、可撓性樹脂材の押し出し成型により導電線の埋設部と凹凸条部の形成された帯を連続的に形成し、その帯の辺部分を互いに接着しながら螺旋状に巻回して導電線部と凹凸条部が螺旋状に形成された管を形成するようにしたので、連続して製造できるようになり、製造効率が向上する。また、踏みつけても変形しない復元性のあるホースが得られると共に、ホース両端部は熱溶融により凹凸溝が潰されて気密になる。また、ホースジョイント部の端部外周面に、可撓性ホース内面の溝に沿う傾斜を有する突起を離散的に形成することにより、ホースをジョイント部に嵌合した際に突起が溝に嵌合して固定が確実になる。さらに、可撓性ホースの端部を接着剤を介してホースジョイント部に嵌合固定することにより、更に接続部のシール性能が向上し、極めて気密性能の良い電気掃除機用ホースが製造できる。
【００３２】
請求項３に係わる発明によれば、可撓性樹脂材の押し出し成型により導電線の埋設部と凹凸条部の形成された帯を連続的に形成し、その帯の辺部分を互いに接着しながら螺旋状に巻回して導電線部と凹凸条部が螺旋状に形成された管を形成するようにしたので、連続して製造できるようになり、製造効率が向上する。また、踏みつけても変形しない復元性のあるホースが得られると共に、ホース両端部は熱溶融により凹凸溝が潰されて気密になる。また、ホースジョイント部の端部外周面に、可撓性ホース内面の溝に沿う傾斜を有する突起を離散的に形成することにより、ホースをジョイント部に嵌合した際に突起が溝に嵌合して固定が確実になる。さらに、可撓性ホースの端部を接着剤を介してホースジョイント部に嵌合固定することにより、更に接続部のシール性能が向上し、極めて気密性能の良い電気掃除機用ホースが製造できる。
【図面の簡単な説明】
【図１】本発明による電気掃除機用ホースの可撓性ホース部分の構造とその製造方法を説明するための説明図。
【図２】本発明による電気掃除機用ホースの可撓性ホース部分の説明図。
【図３】本発明による電気掃除機用ホースの本体側ホースジョイント部の説明図で、（Ａ）はその上面図、（Ｂ）はその側面図、（Ｃ）は（Ａ）のＺ部拡大図。
【図４】本発明による電気掃除機用ホースの可撓性ホース部と本体側ホースジョイント部との接合部分を示すの断面図。
【図５】本発明による電気掃除機用ホースの可撓性ホース部と本体側ホースジョイント部との接合部分を示す平面図。
【図６】本発明による電気掃除機用ホースの可撓性ホース部と本体側ホースジョイント部との接合部分の他の構成例を示すの部分断面図。
【図７】本発明による電気掃除機用延長パイプの説明図で、（Ａ）はその上面図、（Ｂ）は側面図、（Ｃ）は配線蓋を取った状態を示す上面図。
【図８】本発明による電気掃除機用延長パイプの接続端部拡大上面図。
【図９】図８のＡ−Ａ断面図。
【図１０】接続ピンの受け口の説明図で、（Ａ）は上面図、（Ｂ）はＢーＢ断面図。
【図１１】一般的な電気掃除機の構成を説明するための外観図。
【図１２】従来の電気掃除機用ホースの可撓性ホース部分の一部破断説明図。
【図１３】従来の電気掃除機用ホースの本体側ホースジョイント部の側面図。
【図１４】従来の電気掃除機用ホースの可撓性ホース部と本体側ホースジョイント部との接合部分を示す断面図。
【符号の説明】
３１可撓性ホース
３２導電線
３３溝
３４帯
３５接合部
３８閉塞部
４１電気加熱器
５１本体側ホースジョイント部[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a structure of a hose joint part into which a flexible hose is fitted, an electric vacuum cleaner hose having an improved connection structure between a flexible hose and a hose joint part, and a method of manufacturing the same.
[0002]
[Prior art]
As shown in FIG. 11, the electric vacuum cleaner is generally configured by connecting a hose 2 and an extension pipe 3 to a main body 1 and further appropriately attaching a cleaning article 4 such as a floor brush to a tip portion. Further, the hose 2 for the vacuum cleaner is connected to the main body side hose joint portion 7 which is detachably fitted to the air inlet 6 of the main body 1 and the extension pipe 3 at both ends of the flexible hose 5. The hand side hose joint portions 8 are connected to each other.
[0003]
Conventionally, as shown in FIG. 12, the flexible hose 5 is spirally wound together with a conductive wire 9 and a steel wire 10 which are covered with insulation, and a soft material 11 such as vinyl chloride is formed thereon. It was covered with and constituted. Further, as shown in FIG. 13, the hose joint to which the flexible hose 5 is fitted and fixed, for example, the hose joint portion 7 on the main body, is provided at appropriate locations on the outer periphery of the fitting surface so that the flexible hose 5 does not fall off. In this configuration, the protrusion 12 is simply formed. Then, as shown in FIG. 14, an adhesive is applied to the outer peripheral surface of the hose connection side pipe end of the main body side hose joint 7 to fit and fix the flexible hose 5, and the ribs 13 and 14 are used. The cover 15 is attached, and an operation button 17 having a locking claw 16 for engaging and releasing the main body side hose joint portion 7 fitted to the intake port 6 of the main body 1 is attached to the attachment portion 19 and the end of the hose 2 is attached. Consisted of parts.
[0004]
[Problems to be solved by the invention]
Thus, conventionally, the conductive wire 9 and the steel wire 10 are spirally wound together, and the flexible hose 5 covered with the soft material 11 such as vinyl chloride is used for the vacuum cleaner. Since the hose 2 is configured, the flexible hose 5 can be easily fitted and fixed to the hose joint portion 7 on the main body side, but it is difficult to restore the flexible hose 5 to its original state once deformed. As a result, the outer tube becomes unsightly, and the suction force is reduced and dust is easily clogged.
[0005]
In order to improve such a point, the flexible hose 5 is formed of a polyethylene tube in which conductive wires and concave and convex grooves are spirally formed, and the hose 2 for a vacuum cleaner is constructed without using a steel wire. Is also known.
[0006]
However, in the case of the flexible hose 5 having such a concavo-convex groove, the adhesion area when attached to the tube end portions of the main body side hose joint portion 7 and the proximal side hose joint portion 8 is reduced and is easily removed. There is a problem that external air enters the pipe through the concave and convex grooves, and even if the suction force of the main body 1 is increased, no effect appears, and the demand for higher power of the vacuum cleaner in recent years cannot be met.
[0007]
An object of the present invention is to solve the above-mentioned problems and to provide a hose for a vacuum cleaner that improves the sealing performance of a connecting portion between a flexible hose and a hose joint, and a method for manufacturing the same.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is an electric vacuum cleaner hose in which a hose joint portion is fitted and connected to an end portion of a flexible hose, and the hose joint portion is provided on a surface on which the flexible hose is fitted. to form the convex portion to be fitted to the flexible hose, the ends of the flexible hose are fitted and fixed to the hose joint portion with an adhesive, to the outer peripheral surface of the hose joint portion The flexible hose side root where the flange portion is formed and the flange portion of the outer peripheral surface of the hose joint portion is formed is fitted with a flexible hose and is pushed out to the flange portion side. The adhesive pool recess is formed to absorb the surplus portion and wrap around the portion where the adhesive is insufficient .
[0011]
According to a second aspect of the present invention, there is provided a method for manufacturing a hose for an electric vacuum cleaner in which a hose joint portion is fitted and connected to an end portion of a flexible hose, and a conductive wire is embedded by extrusion molding of a flexible resin material. A predetermined length of a flexible hose in which conductive lines and concave and convex grooves are spirally formed by continuously forming the concave and convex bands and spirally winding the side portions of the bands together. And forming the ends of the flexible hose by heat melting to eliminate the concave and convex grooves at both ends of the flexible hose, while forming the substantially flat surface on the outer peripheral surface of the end of the hose joint. In order to fix the flexible hose, discretely forming protrusions having an inclination along a groove formed on the inner surface of the flexible hose, and forming a flange portion with which the end face of the flexible hose contacts, Apply an adhesive to the outer peripheral surface of the end, and Fitted sexual hose, characterized in that fixing is brought into contact with the hose end to the flange portion.
[0012]
According to a third aspect of the present invention, there is provided a method of manufacturing a hose for a vacuum cleaner in which a hose joint portion is fitted and connected to an end portion of a flexible hose, and a conductive wire is embedded by extrusion molding of a flexible resin material. A predetermined length of a flexible hose in which conductive lines and concave and convex grooves are spirally formed by continuously forming the concave and convex bands and spirally winding the side portions of the bands together. And forming the ends of the flexible hose by heat melting to eliminate the concave and convex grooves at both ends of the flexible hose, while forming the substantially flat surface on the outer peripheral surface of the end of the hose joint. In order to fix the flexible hose, a protrusion having an inclination along a groove formed on the inner surface of the flexible hose is discretely formed, and a flange portion with which the end surface of the flexible hose abuts is formed. Apply a soft elastic body to the hose connection side of the flange. After having deposited, the flexible hose fitted, characterized in that to fix the hose end is brought into contact with the flange portion through the elastic body.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an example of an embodiment of the present invention. A flexible hose 31 constituting a hose for a vacuum cleaner is a concave and convex portion having a conductive wire 32 and an inner surface formed in a groove 33 on a polyethylene resin tube. Are formed in a spiral shape, and the flexible hose 31 is manufactured as follows.
[0014]
That is, first, the grooves 33 are continuously formed by extrusion while embedding the conductive wires 32 in the polyethylene resin, and the two conductive wires 32 reciprocating between the vacuum cleaner main body and the hand operation switch are embedded. Then, a band 34 provided with a groove 33 is formed.
[0015]
Next, the side portions of the band 34 are spirally wound while being bonded to each other using an adhesive or the like to form a tube in which the conductive wires 32 and the grooves 33 are formed in a spiral shape. By joining the side portions of the band 34, a narrow groove is formed on the inner surface of the joint 35. Further, on the surface of the tube, as shown in FIG. 1, a protrusion 35 ′ corresponding to the joint 35, a protrusion 32 ′ corresponding to the embedded portion of the two reciprocating conductive wires 32, and a groove 33 on the inner surface. A slightly wider ridge 33 'corresponding to the portion is formed. The hose tube thus formed is cut to a desired length, and the hose tube end surface 36 at the cut end is heated and melted by the electric heater 41.
[0016]
The electric heater 41 includes a flange portion 43 at the end of the fitting portion 42 that fits inside the hose pipe, and a heater wire connected to an external commercial power supply 44 is disposed inside the flange portion 43. The surface of the metal that comes into contact with the hose pipe is subjected to fluorine processing.
[0017]
The hose tube cut into a predetermined length is inserted into the fitting portion 42 of the electric heater 41 until the end surface 36 contacts the flange portion 43. As a result, as shown in FIG. 2A, the hose pipe end surface 36 is formed with a closed portion 38 so as to block the air passage that is melted by heat and the concavo-convex portion is crushed and connected to the inside of the pipe. In this case, a heater is also incorporated in the fitting portion 42 portion of the electric heater 41, and not only the end surface of the hose tube but also the portion that has entered the inner surface of the tube somewhat from the end surface of the hose is heat-melted to crush the uneven strip and finish it flat. In such a case, the joining area with the hose joint joining surface described later increases, and a stronger joining can be obtained.
[0018]
At this time, as shown in FIG. 2 (B), the two conductive wires 32a and 32b are preferably pulled out in advance from the front side of the hose tube end face by breaking the resin sheath of the embedded portion. The flexible hose 31 portion of the vacuum cleaner hose is configured in this manner.
[0019]
On the other hand, as shown in the top view of FIG. 3A, the side view of FIG. 3B, and the enlarged view of the Z part of FIG. 3C, the hose joint part, for example, the main body side hose joint part 51 is fitted with the flexible hose 31. On the mating surface, a ridge 52 having the same inclination as the groove 33 formed on the inner surface of the hose pipe is formed. The ridges 52 are discretely formed so that the flexible hose 31 can be easily screwed, and the end 52a has a taper rising from the tube surface.
[0020]
Further, a flange-like rib 53 with which the end surface abuts is formed on the fitting surface of the main body side hose joint portion 51, and a concave portion 54 serving as an adhesive pool to be described later is formed at the root of the rib 53 on the hose connection side. Has been. The rest of the configuration such as the operation button mounting portion 55 is the same as the conventional one.
[0021]
An adhesive is applied to the hose connection side pipe outer peripheral surface of the main body side hose joint part 51 having such a configuration, and the flexible hose 31 is pushed in while rotating. As a result, the ridge 52 is fitted into the groove 33 formed on the inner surface, and thereafter, the flexible hose 31 is rotated to be sequentially fitted in the rib 53 direction. As shown in the top view of FIG. 5, the flexible hose 31 and the rib 53 are fitted and connected in a state where the closing portion 38 formed on the hose tube surface is in contact with the rib 53.
[0022]
At this time, the adhesive applied to the tube surface is pushed into the rib 53 side with the insertion of the flexible hose 31. If the concave portion 54 is not formed at the root of the rib 53, when the end surface of the flexible hose 31 comes into contact with the rib 53, the excess portion of the adhesive overflows on the surface of the joint and reaches the operator's hand. Although the operation is hindered, the formation of the concave portion 54 absorbs the excess adhesive into the concave portion 54 without overflowing the surface, and the excess adhesive accumulated in the concave portion 54 passes around the portion where the adhesive is insufficient. Filled.
[0023]
As described above, the protruding portion 52 of the hose joint 51 on the main body side is fitted into the groove 33 of the flexible hose 31, and the closing portion 38 on the end surface of the hose pipe is joined to the rib 53 and firmly fitted. Fixed. Thereafter, the two conductive wires 32a and 32b and the lead wires connected to the electrical connection pins 58a and 58b formed on the main body side hose joint portion 51 are connected, and the rib 53 and the operation button mounting portion 55 are connected. Store in the gap. A partition rib 59 is formed in the gap so that the two conductive wire connecting portions do not contact each other. Further, a hose cover 61 is mounted on the joint surface between the flexible hose 31 and the main body side hose joint portion 51, while the operation button mounting portion 55 is engaged with an intake port formed in the main body. Then, the operation button 57 having the locking claw 56 for releasing is attached, and the joining of the flexible hose 31 and the main body side hose joint part 51 is completed. Moreover, joining of the flexible hose 31 and the hand side hose joint part is performed in the same manner as described above to obtain a hose for a vacuum cleaner.
[0024]
By the way, in response to the recent power-up of the vacuum cleaner main body, in order to make the seal of the joint of the flexible hose 31 and the main body side hose joint 51 more complete, Before fitting into the side hose joint 51, a sponge-like soft elastic member 71 is wound around the hose connection side at the base of the rib 53. Alternatively, an elastic member 71 formed by cutting a urethane sheet having a thickness of 1 to 2 cm into a donut shape according to the shape of the rib 53 may be bonded to the hose connection side surface of the rib 53. The flexible hose 31 is inserted into the distal end portion of the main body side hose joint portion 51 to which the elastic member 71 is adhered in the same manner as described above, and the closed portion 38 on the end surface of the hose tube is strongly pressed against the rib 53 side. As a result, as shown in FIG. 6, the elastic member 71 is inserted between the closed portion 38 and the rib 53 in a crushed state, and thereby air circulation through the continuous grooves 33 and 35 is further improved. A vacuum cleaner hose that is completely shut off and has a very good sealing performance is obtained.
[0025]
7A and 7B are explanatory views of the extension pipe 81 connected to the hand side hose joint portion of the vacuum cleaner hose. FIG. 7A is a top view thereof, FIG. 7B is a side view thereof, and FIG. It is the top view which removed the provided cover 82. FIG. That is, in a vacuum cleaner equipped with a power brush, it is necessary to supply power to the power brush motor from the main body side. For this reason, one end of the extension pipe 81 is electrically connected to the hand side hose joint. 83. At the other end, a receiving port 84 for connecting to the connection pin on the power brush side is disposed, and a power supply line 85 is disposed on the air passage 86 by connecting the connecting pin 83 and the receiving port 84. .
[0026]
8 is an enlarged view of one end portion of the extension pipe 81 shown in FIG. 7C, and FIG. 9 is a cross-sectional view taken along the line AA in FIG. FIG. 10 is a detailed view of the receptacle 84, where (A) is a top view and (B) is a BB cross-sectional view. As is apparent from these drawings, the receiving port 84 has two pieces 84a formed of a conductive elastic metal plate that comes into contact with the connecting pin to be inserted, and a flat plate-like shape joined to the piece 84a at the root portion. Contact between the terminal plate 84b, a boss 84c in which a hole is formed in the flat terminal plate 84b to form a cylinder, and an insertion pin that rises from the flat terminal plate 84b in front and is fixed to the section 84a The wall 84d is further configured to be connected to a power supply line connection holding portion 85e formed of a plastic metal plate having gripping pieces on both sides in order to connect and hold the power supply line.
[0027]
As shown in FIG. 9, the receptacle 84 is attached by fitting a cylindrical boss 84 c to a cylindrical rib 86 a formed on the upper surface of the air passage 86. The boss 84c has an R formed at the base. Thereby, the stress concentration at the time of power brush attachment and detachment can be eased, and the life of the receptacle 84 can be extended. That is, stress is concentrated on the boss 84c due to the force along the front-rear direction of connection pin insertion repeatedly applied to the receiving port 84 due to repeated insertion and removal of the connection pin by repeated attachment and detachment of the power brush. However, in the present invention, the cylindrical boss 84c is formed on the flat terminal board 84b and is fitted and fixed to the rib 86a, so that the durability of the receiving port 84 can be increased. Since the R surface is formed at the base, stress concentration due to repeated attachment and detachment can be reduced to prevent breakage, and further, the receiving port 84 can be fixed and the life can be extended.
[0028]
【The invention's effect】
According to the first aspect of the present invention , the adhesive hose joint recess is formed in the flexible hose side base portion of the flange portion of the outer peripheral surface of the hose joint portion, so that the hose is fitted to the hose joint portion. When fixing, the adhesive is not absorbed into the recess and overflows to the surface of the hose joint, improving the workability and allowing the adhesive to wrap around the insufficient part of the adhesive. A good vacuum cleaner hose can be obtained.
[0031]
According to the invention according to claim 2 , the band in which the embedded portion of the conductive wire and the concave and convex portion are formed is continuously formed by extruding the flexible resin material, and the side portions of the band are adhered to each other. Since the tube is formed in a spiral shape so that the conductive wire portion and the uneven strip portion are formed in a spiral shape, it can be continuously manufactured, and the manufacturing efficiency is improved. In addition, a restoring hose that does not deform even when stepped on is obtained, and at both ends of the hose, the concave and convex grooves are crushed by heat melting and become airtight. Also, by forming protrusions with slopes along the groove on the inner surface of the flexible hose on the outer peripheral surface of the end part of the hose joint part, the protrusions fit into the groove when the hose is fitted to the joint part. And it will be fixed securely. Furthermore, by fitting and fixing the end of the flexible hose to the hose joint part via an adhesive, the sealing performance of the connection part is further improved, and a hose for a vacuum cleaner with extremely good airtightness can be manufactured.
[0032]
According to the invention according to claim 3 , the band in which the embedded portion of the conductive wire and the concave and convex portion are formed is continuously formed by extruding the flexible resin material, and the side portions of the band are adhered to each other. Since the tube is formed in a spiral shape so that the conductive wire portion and the uneven strip portion are formed in a spiral shape, it can be continuously manufactured, and the manufacturing efficiency is improved. In addition, a restoring hose that does not deform even when stepped on is obtained, and at both ends of the hose, the concave and convex grooves are crushed by heat melting and become airtight. Also, by forming protrusions with slopes along the groove on the inner surface of the flexible hose on the outer peripheral surface of the end part of the hose joint part, the protrusions fit into the groove when the hose is fitted to the joint part. And it will be fixed securely. Furthermore, by fitting and fixing the end of the flexible hose to the hose joint part via an adhesive, the sealing performance of the connection part is further improved, and a hose for a vacuum cleaner with extremely good airtightness can be manufactured.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram for explaining a structure of a flexible hose part of a hose for a vacuum cleaner according to the present invention and a manufacturing method thereof.
FIG. 2 is an explanatory view of a flexible hose portion of a hose for a vacuum cleaner according to the present invention.
FIG. 3 is an explanatory view of a hose joint portion on the main body side of the hose for a vacuum cleaner according to the present invention, (A) is a top view thereof, (B) is a side view thereof, and (C) is an enlarged Z portion of (A). Figure.
FIG. 4 is a cross-sectional view showing a joint portion between a flexible hose portion and a main body side hose joint portion of a vacuum cleaner hose according to the present invention.
FIG. 5 is a plan view showing a joint portion between a flexible hose portion and a main body side hose joint portion of a vacuum cleaner hose according to the present invention.
FIG. 6 is a partial cross-sectional view showing another configuration example of the joint portion between the flexible hose portion and the main body side hose joint portion of the hose for a vacuum cleaner according to the present invention.
7A and 7B are explanatory views of an extension pipe for a vacuum cleaner according to the present invention, in which FIG. 7A is a top view thereof, FIG. 7B is a side view, and FIG. 7C is a top view showing a state where a wiring cover is removed.
FIG. 8 is an enlarged top view of a connection end of an extension pipe for a vacuum cleaner according to the present invention.
9 is a cross-sectional view taken along line AA in FIG.
FIGS. 10A and 10B are explanatory views of a connection pin receptacle, in which FIG. 10A is a top view and FIG.
FIG. 11 is an external view for explaining a configuration of a general electric vacuum cleaner.
FIG. 12 is a partially broken explanatory view of a flexible hose portion of a conventional vacuum cleaner hose.
FIG. 13 is a side view of a main body side hose joint part of a conventional vacuum cleaner hose.
FIG. 14 is a cross-sectional view showing a joint portion between a flexible hose portion of a conventional vacuum cleaner hose and a main body side hose joint portion.
[Explanation of symbols]
31 Flexible hose 32 Conductive wire 33 Groove 34 Band 35 Joint part 38 Closure part 41 Electric heater 51 Body side hose joint part

Claims

In a hose for a vacuum cleaner in which a hose joint portion is fitted and connected to an end portion of a flexible hose, the hose joint portion is fitted to the flexible hose on a surface to which the flexible hose is fitted. While forming a ridge part, the end of the flexible hose is fitted and fixed to the hose joint part via an adhesive, and on the outer peripheral surface of the hose joint part, a flange part is formed, The flexible hose side root where the flange part of the outer peripheral surface of the hose joint part is formed absorbs an excess part of the adhesive pushed out to the flange part side together with the insertion of the flexible hose. A hose for a vacuum cleaner, characterized in that a concave portion of the adhesive pool is formed so as to wrap around a portion where the amount of the adhesive is insufficient .

In a method of manufacturing a vacuum cleaner hose in which a hose joint portion is fitted and connected to an end portion of a flexible hose, an uneven belt in which conductive wires are embedded is continuously formed by extrusion molding of a flexible resin material. And forming the flexible hose of a predetermined length in which the conductive wire and the concave and convex grooves are formed in a spiral shape by winding the side portions of the band in a spiral shape while adhering to each other. In order to fix the flexible hose to the outer peripheral surface of the end portion of the hose joint portion, the end portions of the hose joint portion are formed by being melted by heat so that the concave and convex grooves at both ends of the flexible hose are eliminated. A protrusion having an inclination along a groove formed on the inner surface of the flexible hose is discretely formed, a flange portion that contacts the end surface of the flexible hose is formed, and an adhesive is applied to the outer peripheral surface of the end portion. After application, fit the flexible hose and Method for producing a hose for vacuum cleaner, characterized in that the hose end is brought into contact with the flange portion to fix.

In a method of manufacturing a vacuum cleaner hose in which a hose joint portion is fitted and connected to an end portion of a flexible hose, an uneven belt in which conductive wires are embedded is continuously formed by extrusion molding of a flexible resin material. And forming the flexible hose of a predetermined length in which the conductive wire and the concave and convex grooves are formed in a spiral shape by winding the side portions of the band in a spiral shape while adhering to each other. In order to fix the flexible hose to the outer peripheral surface of the end portion of the hose joint portion, the end portions of the hose joint portion are formed by being melted by heat so that the concave and convex grooves at both ends of the flexible hose are eliminated. Protrusions having slopes along the grooves formed on the inner surface of the flexible hose are discretely formed, and a flange portion that contacts the end surface of the flexible hose is formed, and a soft portion is formed on the hose connection side of the flange portion. Flexibility after bonding an elastic body Over scan the fitted, the manufacturing method for a vacuum cleaner hose, characterized in that to fix the hose end is brought into contact with the flange portion through the elastic body.