JP4035301B2

JP4035301B2 - Automatic door drive belt tension adjuster

Info

Publication number: JP4035301B2
Application number: JP2001246712A
Authority: JP
Inventors: 吉田　　敬; 敏之阿久津; 克巳新倉
Original assignee: 千蔵工業株式会社
Priority date: 2001-08-15
Filing date: 2001-08-15
Publication date: 2008-01-23
Anticipated expiration: 2019-02-26
Also published as: JP2002097838A

Description

【０００１】
【発明の属する技術分野】
本発明は、自動ドアの上部で扉を開閉駆動する駆動用ベルトに設けられて、この駆動用ベルトのテンションを調整する自動ドア駆動用ベルトのテンション調整装置に関するものである。
【０００２】
【従来の技術】
自動ドアには、扉の上端を、プーリー間に巻回された駆動用ベルトに固定し、モーター等の駆動源によってプーリー及び駆動用ベルトを駆動することによって扉を開閉駆動するように構成したものがある。
ところで、前記駆動用ベルトは、自動ドアの設置時にプーリー間に巻回した後、駆動源の動力を効率良く伝達するために、テンション調整装置によって張力が調整される。また、この駆動用ベルトは、ゴム等の弾性部材からなり、長期間の使用によって延伸した場合も、メンテナンス時にテンション調整装置によって張力が調整される。
従来の自動ドア駆動用ベルトのテンション調整装置は、図９に示すように、有端の駆動用ベルト１０１をプーリー間に巻回し、該駆動用ベルト１０１の一端を、扉上端に水平バー１０２を介して固定された支持板１０３に止着すると共に、その他端をブラケット１０４に止着し、このブラケット１０４から手前側に突出した突片部１０４ａと支持板１０３から手前側に突出した突片部１０３ａとにボルト１０５を貫装し、突片部１０３ａを挟むようにして二つのナット１０６，１０６をボルト１０５の先端側に螺合してなる。そして、駆動用ベルト１０１の張力を調整する際には、二つのナット１０６，１０６をスパナ等の工具で回転調整することにより、ボルト１０５を水平に移動させ、駆動用ベルト１０１が適度な張力となったところで両ナット１０６，１０６を締め付け固定する。
【０００３】
【発明が解決しようとする課題】
しかしながら、従来の自動ドア駆動用ベルトのテンション調整装置において、駆動用ベルト１０１は、ゴム等の弾性部材からなるので、張力がかかってくると、工具で回されるナット１０６と一緒にボルト１０５及びブラケット１０４も回ってしまい、それに伴って捩れてしまう。そこで、ブラケット１０４が回らないようにボルト１０５の頭部にスパナを掛けて作業することになるが面倒である。
その上、工具でナット１０６を回しても、ボルト１０５が移動する量が、ナット１０６の回転角あたりのネジピッチ分だけなので、工具を回す回転動作の割にボルト１０５が移動する量が少なく、駆動用ベルト１０１の牽引効率が悪い。
しかも、スパナ等の工具の柄部分を手前側に回さなければならないため、工具の柄部分が上下で駆動用ベルト１０１や水平バー１０２等の他の部材にぶつかってしまい、その度毎に工具をナット１０６に嵌め直さなければならないので作業性が悪い。
【０００４】
本発明は上記従来事情に鑑みてなされたものであり、その目的とする処は、駆動用ベルトを捩ることなく牽引でき、しかも、少ない回転操作でも駆動用ベルトの牽引量が大きく、その上、工具が回し易く作業性のよいドア駆動用ベルトのテンション調整装置を提供することにある。
【０００５】
【課題を解決するための手段】
斯る本発明の自動ドア駆動用ベルトのテンション調整装置は、有端の駆動用ベルトをプーリー間に巻回し、該駆動用ベルトの一端を扉側に止着すると共に、その他端を牽引するように構成した自動ドア駆動用ベルトのテンション調整装置において、扉の上端に固定される支持板と、駆動用ベルトの回動軸と略平行な支軸によって該支持板に回動可能に軸着されると共に、駆動用ベルトの前記他端を外周面に係合する調整用ホイールと、該調整用ホイールの回動を係脱させる固定手段とを備え、前記駆動用ベルトは弾性部材からなるＶベルトであり、前記調整用ホイールは、その外周に前記Ｖベルトに食い込ませる爪を複数形成した爪車状であって、手前面に係合部を一体的に設け、該係合部に工具を係合して回動されるように構成し、前記固定手段は、前記調整用ホイールを前記支軸に止着する軸部ネジであって、該軸部ネジの緊緩によって前記軸部ネジの頭部が前記調整用ホイールの回動を係脱させ、さらに、前記調整用ホイールの側面に円弧状長孔を貫穿し、該円弧状長孔に挿通した固定ネジであって、その固定ネジを前記支持板に螺着し、該固定ネジの緊緩によって固定ネジの頭部が前記調整用ホイールの回動を係脱させる構成を備えたことを特徴とする。
ここで、係合部とは、例えば、調整用ホイールの軸部を手前側に突出させ、その突出した軸部外周を二面取りしてスパナ等を係合可能にした構成や、調整用ホイールの側面に支軸に対して対象な二つの孔を設け、これらの孔に先端二股状の工具を係合可能にした構成等を含むものである。
【０００６】
上記本発明によれば、軸部ネジを緩めて、工具を、その柄部分を支軸と略直角にした状態で、調整用ホイールの手前面の係合部に係合し、該工具によって該調整用ホイールをＶベルトの牽引方向に回すと、調整用ホイールは、外周面をＶベルトに食い込ませながら、工具を回転させた回転角分回転し、駆動用ベルトを捩ることなく牽引する。そして、軸部ネジを締め付けることによって、軸部ネジの頭部と支持板の間で調整用ホイールが挟持されるため、調整用ホイールの回動が係止するので、Ｖベルトに張力がかかった状態で固定される。
また、軸部ネジにより調整用ホイールが固定されることに加えて、固定ネジの締め付けにより、固定ネジの頭部と支持板の間で調整用ホイールが挟持されるため、調整用ホイールは二重に固定される。その上、固定ネジを挿通する孔が円弧状長孔であるため、回転させた調整用ホイールを、円弧状長孔の範囲内における任意の個所で係止でき、しかも、調整用ホイールをその軸心から離れた個所で係止するため、そのモーメントの作用によって、より強固に調整用ホイールを固定する。
【０００７】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
【０００８】
図１乃至５は、本発明に係わるテンション調整装置の特に固定手段を示し、図６は本発明の実施の形態、図７は、本発明に係わるテンション調整装置の他例を示す。また、図８は、本発明に係わるテンション調整装置を適用した自動ドアを示す。
【０００９】
テンション調整装置１０は、両開き式自動ドアＡの上部で両扉ａ１，ａ１’を開閉駆動する駆動用ベルト１に設けてあり、支持板３と、調整用ホイール４と、固定手段５と、案内部材６とを備えている。
【００１０】
駆動用ベルト１は、ゴム等の弾性部材からなる有端状の歯付きベルト（以降符号１を付けて説明する）であり、自動ドアＡ上部で駆動源ａ２側のプーリーａ３と従動側のプーリーａ４との間に巻回され、その一端（以降固定側端部と称する）をブラケット１３によって支持板３にネジ止めし、他端（以降牽引側端部と称する）を同支持板３に設けた調整用ホイール４で牽引される。
尚、固定側端部を固定する位置は、上記したように支持板３でなく、支持板３が固定される扉ａ１側の他の個所であっても構わない。
【００１１】
支持板３は、図２に示すように縦断面クランク状に曲げ加工した金属板であり、その下端側を、一方の扉ａ１の上端に一体的に固定された水平バー１０２に、ネジ止め固定してある。
【００１２】
調整用ホイール４は、その外周に歯付きベルト１の歯と噛合する歯４ａを複数形成した歯車状を呈し、その側面に、複数の円弧状長孔４ｂと、軸心に対して略対象となる二つの孔状係合部１４とを貫穿し、更に、中心部に軸孔４ｃを貫穿して、この軸孔４ｃの手前側の外縁部を突出させた突縁部４ｄを形成し、そして、その突縁部４ｄの周側面に、軸心を挟んで略平行に二面取りした平行係合部２４を形成してある。
そして、この調整用ホイール４は、支持板３に、歯付きベルト１の回動軸（プーリーａ３，ａ４の軸）と略平行に支軸２３を嵌着して、この支軸２３に軸孔４ｃを環装することによって回動可能に軸着してある。
【００１３】
固定手段５は、軸部ネジ１５と固定ネジ２５とからなり、調整用ホイール４の回動を係脱する。
【００１４】
軸部ネジ１５は、調整用ホイール４をバネ座金及び座金を介して支軸２３に止着したボルトであり、その頭部にスパナ等の工具を係合して緊緩されることによって、調整用ホイール４の回動を係脱する。即ち、軸部ネジ１５を締め付けた際には、軸部ネジ１５の頭部と支持板３の間で調整用ホイール４を挟持するため、調整用ホイール４を係止し、また、軸部ネジ１５を緩めた際には、前記挟持状態が解除されて、調整用ホイール４を回動自在にする。
【００１５】
固定ネジ２５は、バネ座金及び座金を介して調整用ホイール４の円弧状長孔４ｂに挿通して、支持板３に形成したネジ孔３ａに螺着したボルトであり、その頭部にスパナ等の工具を係合して緊緩されることによって、調整用ホイール４の回動を係脱する。即ち、固定ネジ２５を締め付けた際には、固定ネジ２５の頭部と支持板３の間で調整用ホイール４を挟持するため、調整用ホイール４を係止し、また、固定ネジ２５を緩めた際には、前記挟持状態が解除されて、調整用ホイール４を円弧状長孔４ｂの円弧長さの範囲内で回動自在にし、更に、固定ネジ２５を緩めて外した際には、調整用ホイール４を３６０度回動可能にする。
尚、ネジ孔３ａは、円弧状長孔４ｂに臨む支持板３上に複数形成してあり、固定ネジ２５を、複数の円弧状長孔４ｂの何れかに挿通すると共に複数のネジ孔３ａの何れかに螺着することによって、調整用ホイール４を係止する位置を選択できるようにしてある。
【００１６】
また、軸部ネジ１５及び固定ネジ２５は、何れも独立して調整用ホイール４を係止するため、固定手段５を、軸部ネジ１５または固定ネジ２５の何れか一方のみの構成としても構わないが、本実施の形態のテンション調整装置１０では、歯付きベルト１に張力がかかった状態で、調整用ホイール４をより確実に係止するために、軸心部を固定する軸部ネジ１５と、軸心から離れた位置で、そのモーメントの作用によってより強固に固定する固定ネジ２５との両者を具備している。
【００１７】
案内部材６は、第一案内部材１６と第二案内部材２６とから構成される。
【００１８】
第一案内部材１６は、調整用ホイール４との間にこの調整用ホイール４と噛合した歯付きベルト１の通路を形成するように形成した金属片で、調整用ホイール４の下方の支持板３上に歯付きベルト１と略平行になるようにネジ止めしてあり、調整用ホイール４との間に歯付きベルト１の牽引側端部を導入する。
【００１９】
第二案内部材２６は、第一案内部材１６と略同形状に形成した金属片で、調整用ホイール４を間に置いて第一案内部材１６に対向するように支持板３上にネジ止めしてあり、調整用ホイール４が巻回た歯付きベルト１の牽引側端部を、調整用ホイール４との間から、前記導入方向の反対方向に案内する。
尚、第一案内部材１６及び第二案内部材の材質は、上記金属片に限定されるものでなく、例えば、樹脂成型部材であっても構わない。
【００２０】
次に、上記構成のテンション調整装置１０についての作用を説明する。
軸部ネジ１５及び固定ネジ２５を緩めた状態で、調整用ホイール４と第一案内部材１６との間に歯付きベルト１の牽引側端部を導入し、図４に示すように、スパナ等の一般工具７を、調整用ホイール４の平行係合部２４に係合して、調整用ホイール４を歯付きベルト１の牽引方向（図４における反時計回り）に回すと、調整用ホイール４は、外周の歯４ａを歯付きベルト１の歯に噛合させながら、一般工具７を回転させた回転角分回転し、歯付きベルト１を捩ることなく牽引する。そして、調整用ホイール４に巻回された歯付きベルト１の牽引側端部を、第二案内部材２６によって、第一案内部材１６により導入した方向の反対方向に案内する。よって、牽引されることで余分となる歯付きベルト１端末の収納性が良い。
そして、軸部ネジ１５及び固定ネジ２５を締め付けることにより、歯付きベルト１に張力がかかった状態で、調整用ホイール４が固定される。
【００２１】
尚、上記牽引時には、歯付きベルト１の歯と調整用ホイール４の歯４ａとが噛合するため、歯付きベルト１を滑り抜けることなく牽引し、また、第一案内部材１６及び第二案内部材２６が、歯付きベルト１と調整用ホイール４との噛合状態を滑脱のないように保つ。
【００２２】
また、図４に示す一例では、調整用ホイール４をスパナ等の一般工具で回転しているが、図５に示すように、先端の二股部８ａ，８ａを同一方向に曲げた専用工具８により、その二股部８ａ，８ａを調整用ホイール４の孔状係合部１４，１４に係合して、調整用ホイール４を回転するようにしてもよい。
この専用工具８は、自動ドアＡの他の箇所で、扉ａ１，ａ１’の水平調整を行う為のものであるが、調整用ホイール４の孔状係合部１４，１４の孔径及び孔ピッチの設定により、本実施の形態のテンション調整装置１０にも兼用できるようにしてある。
【００２３】
次に、図６により本発明のテンション調整装置２０について説明する。
テンション調整装置２０は、上記したテンション調整装置１０に対し、歯付きベルト１をＶベルト１’に置き換え、調整用ホイール４を調整用ホイール４’に置き換え、支持板３を支持板３’に置き換えて構成したものであり、その他上記したテンション調整装置１０のものと同一構成の部分については、重複説明を省略する。
【００２４】
Ｖベルト１’は、ゴム等の弾性部材からなる有端状で、且つ歯を有さない一般的なＶベルトであり、自動ドアＡ上部で駆動源ａ２側のプーリーａ３と従動側のプーリーａ４との間に巻回され、その一端をブラケット１３によって支持板３’に固定され、他端を同支持板３’に設けた調整用ホイール４’で牽引される。
【００２５】
調整用ホイール４’は、その外周にＶベルト１’に食い込ませる爪４ａ’を複数形成した爪車状を呈し、上記した調整用ホイール４のものと同一に構成された孔状係合部１４，平行係合部２４，円弧状長孔４ｂ，軸孔４ｃ，突縁部４ｄを有する。
そして、この調整用ホイール４’は、支持板３’に、上記したテンション調整装置１０と同様の構成によって、回動可能に軸着してある。
【００２６】
支持板３’は、手間側に水平面１６’を有するように縦断面クランク状に曲げ加工した金属板であり、その下端側を、一方の扉ａ１の上端に一体的に固定された水平バー１０２に、ネジ止め固定してあり、前記水平面１６’が、調整用ホイール４’との間にＶベルト１’の牽引側端部を導入案内するように構成されている。よって、上記したテンション調整装置１０における第一案内部材１６が省かれて、より廉価な構成となっている。
【００２７】
尚、図６においては、Ｖベルト１’の牽引側端部を前記導入方向の反対方向に案内する部材が無いが、上記した第二案内部材２６を、調整用ホイール４’を間に置いて前記水平面１６’に対向するように支持板３上に設けるか、あるいは、支持板３’の上辺部を手前側に折り曲げ加工した折り曲げ部（図示せず）形成して、これら第二案内部材２６または前記折り曲げ部によって、Ｖベルト１’を導入した方向の反対方向に案内するようにしてもよく、この場合、上記テンション調整装置１０と同様に、牽引により余分となるＶベルト１’端末の収納性が良い。
【００２８】
而して、上記構成のテンション調整装置２０は、軸部ネジ１５及び固定ネジ２５を緩めた状態で、調整用ホイール４’と水平面１６’との間にＶベルト１’の牽引側端部を導入し、一般工具７または専用工具８を、平行係合部２４あるいは孔状係合部１４，１４に係合して、調整用ホイール４’をＶベルト１’の牽引方向（図６における反時計回り）に回すと、調整用ホイール４’は、外周の爪４ａ’をＶベルト１’に食い込ませながら、一般工具７又は専用工具８を回転させた回転角分回転し、Ｖベルト１’ を捩ることなく牽引する。
そして、軸部ネジ１５及び固定ネジ２５を締め付けることにより、Ｖベルト１’に張力がかかった状態で、調整用ホイール４’が固定される。
【００２９】
次に、図７に示す実施の形態であるテンション調整装置３０について説明する。
テンション調整装置３０は、上記したテンション調整装置１０に対し、歯付きベルト１をＶベルト１’に置き換え、調整用ホイール４を調整用ホイール４”に置き換え、更に、支持板３を支持板３”に置き換えて構成したものであり、その他上記したテンション調整装置１０のものと同一構成の部分については、重複説明を省略する。
【００３０】
Ｖベルト１’は、テンション調整装置２０の構成で説明したものと同一のＶベルトであり、自動ドアＡ上部で駆動源ａ２側のプーリーａ３と従動側のプーリーａ４との間に巻回され、その一端をブラケット１３（図示せず）によって支持板３”に固定され、他端を同支持板３”に設けた調整用ホイール４”で牽引される。
【００３１】
調整用ホイール４”は、小径側面と該面に対して大径な大径側面とを有するかさ型車状を呈し、上記した調整用ホイール４のものと同一に構成された孔状係合部１４（図示せず），平行係合部２４（図示せず），円弧状長孔４ｂ，軸孔４ｃ，突縁部４ｄを備える。
そして、この調整用ホイール４”は、支持板３”に、上記したテンション調整装置１０と同様の構成によって、小径側側面を該支持板３”に向けて回動可能に軸着してある。
尚、図７に示す例において、調整用ホイール４”の外周面は、平坦面であるが、爪や歯等を複数設けて、Ｖベルト１’との係合を強化するようにしてもよい。
【００３２】
支持板３”は、一方の片部を水平バー１０２の手前面にネジ止めされた縦断面Ｌ型形状を呈する水平部材３３と、この水平部材３３における他方の片部の上面略中央に、直立するように固定された縦断面Ｌ型形状を呈する垂直部材４３とからなり、前記水平部材３３において手前側（図７における左側）に突出する水平面１６”が、調整用ホイール４”との間に、Ｖベルト１’の牽引側端部を導入案内するように構成されている。よって、上記したテンション調整装置１０における第一案内部材１６が省かれた廉価な構成となっている。
【００３３】
尚、図７においては、Ｖベルト１’の牽引側端部を前記導入方向の反対方向に案内する部材が無いが、上記したテンション調整装置２０と同様に、第二案内部材２６を垂直部材４３上に設けるか、あるいは、垂直部材４３の上辺部に折り曲げ部（図示せず）形成してもよく、この場合、上記した二つの態様と同様の作用効果を奏するのは勿論である。
【００３４】
而して、上記構成のテンション調整装置３０は、軸部ネジ１５及び固定ネジ２５を緩めた状態で、調整用ホイール４”と水平面１６”との間にＶベルト１’の牽引側端部を導入し、一般工具７または専用工具８を、平行係合部２４あるいは孔状係合部１４，１４に係合して、調整用ホイール４”をＶベルト１’の牽引方向に回すと、調整用ホイール４”は、その外周面と水平面１６”との間でＶベルト１’を挟み持ちながら、一般工具７又は専用工具８を回転させた回転角分回転し、Ｖベルト１’を捩ることなく牽引する。この際、Ｖベルト１’は、調整用ホイール４”が大径部を外側にしているため、外方向に脱落することがない上、調整用ホイール４”の外周面と水平面１６”との間で局部的に圧縮されるので、引き抜き方向に脱落することもない。
そして、軸部ネジ１５及び固定ネジ２５を締め付けることにより、Ｖベルト１’に張力がかかった状態で、調整用ホイール４”が固定される。
【００３５】
尚、上記したテンション調整装置２０及びテンション調整装置３０では、駆動用ベルトを廉価なＶベルト１’にしている上、Ｖベルト１’を導入案内する案内部材を支持板支持板３’又は支持板３”と一体にしているため、より低廉価なテンション調整装置を提供できる。
【００３６】
【発明の効果】
本発明は、以上説明したように構成されているので、以下に記載されるような効果を奏する。
調整用ホイールがＶベルトの回動軸に略平行する支軸を軸心にして回動するため、Ｖベルトを捩るとことがなく、しかも、工具により調整用ホイールを回動させたその調整用ホイール外周の円弧長さ分が直接Ｖベルトの牽引量となるため、従来のものと比較して工具を回転した回転角あたりのＶベルトの牽引量が多い上、工具を調整用ホイールの側面（手前側面）に平行させて回せばよいので、工具の柄部分が駆動用ベルトや扉上部の水平バー等の部材に上下で当たることがなく、作業性が良い。
しかも、固定手段を、調整用ホイールを支軸に止着する軸部ネジにすることで、簡単且つ廉価な構造で調整用ホイールの回動を係脱できる上、その係止する回転角が自在となる。
さらに、固定手段として、調整用ホイールの側面に円弧状長孔を貫穿し、該円弧状長孔に挿通した固定ネジを支持板に螺着する構成を加えることにより、回転させた調整用ホイールを、円弧状長孔の任意の個所で係脱できるとともに、調整用ホイールをその軸心から離れた個所で係止するので、そのモーメントの作用によって、より強固に調整用ホイールを固定でき、前記軸部ネジによる固定手段と併せて調整用ホイールを確実に固定することができる。
【図面の簡単な説明】
【図１】本発明に係わるテンション調整装置の特に固定手段を示す正面図。
【図２】図１における（２）−（２）線断面図。
【図３】同テンション調整装置を示す斜視図。
【図４】調整用ホイールを一般工具で回動している状態を示す正面図。
【図５】（ａ）は、調整用ホイールを回動する専用工具を示す斜視図、
（ｂ）は、その専用工具で調整用ホイールを回動している状態を示す正面図。
【図６】本発明のテンション調整装置を示す正面図。
【図７】本発明に係わるテンション調整装置の他例を示す側面図。
【図８】本発明のテンション調整装置を適用した自動ドアを示す正面図。
【図９】従来のテンション調整装置を示す正面図。
【符号の説明】
Ａ：自動ドア
１’：Ｖベルト（駆動用ベルト）
３’：支持板
４’：調整用ホイール
４ａ’：爪
４ｂ：円弧状長孔
５：固定手段
２０：テンション調整装置
１４：孔状係合部
１５：軸部ネジ
２３：支軸
２４：平行係合部
２５：固定ネジ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tension adjusting device for an automatic door driving belt which is provided on a driving belt for opening and closing the door at the upper part of the automatic door and adjusts the tension of the driving belt.
[0002]
[Prior art]
The automatic door is configured so that the upper end of the door is fixed to a driving belt wound between pulleys, and the door is opened and closed by driving the pulley and the driving belt by a driving source such as a motor. There is.
By the way, the tension of the driving belt is adjusted by a tension adjusting device in order to efficiently transmit the power of the driving source after being wound between the pulleys when the automatic door is installed. Further, the driving belt is made of an elastic member such as rubber, and the tension is adjusted by the tension adjusting device at the time of maintenance even when the driving belt is extended by long-term use.
As shown in FIG. 9, a conventional tension adjusting device for an automatic door driving belt winds an endless driving belt 101 between pulleys, one end of the driving belt 101 and a horizontal bar 102 at the upper end of the door. The other end is fixed to the bracket 104, and the protruding piece 104 a protruding from the bracket 104 toward the front side and the protruding piece portion protruding from the support plate 103 toward the front side. Bolts 105 are inserted into 103a, and two nuts 106, 106 are screwed onto the tip side of the bolt 105 so as to sandwich the protruding piece 103a. When adjusting the tension of the driving belt 101, the bolts 105 are moved horizontally by rotating and adjusting the two nuts 106 and 106 with a tool such as a spanner, so that the driving belt 101 has an appropriate tension. Then, the nuts 106 and 106 are tightened and fixed.
[0003]
[Problems to be solved by the invention]
However, in the conventional tension adjusting device for an automatic door driving belt, the driving belt 101 is made of an elastic member such as rubber. Therefore, when tension is applied, the bolt 105 and the nut 105 rotated by a tool are used. The bracket 104 also turns and twists accordingly. Therefore, it is troublesome to work with a spanner on the head of the bolt 105 so that the bracket 104 does not rotate.
In addition, even if the nut 106 is turned with a tool, the amount of movement of the bolt 105 is only the screw pitch per rotation angle of the nut 106. The pulling efficiency of the belt 101 is poor.
Moreover, since the handle portion of a tool such as a spanner must be turned to the near side, the handle portion of the tool hits other members such as the driving belt 101 and the horizontal bar 102 up and down, and the tool is , The workability is poor.
[0004]
The present invention has been made in view of the above-described conventional circumstances, and the intended process is that the driving belt can be pulled without twisting, and the driving belt has a large pulling amount even with a small rotational operation. An object of the present invention is to provide a tension adjusting device for a door driving belt which is easy to turn a tool and has good workability.
[0005]
[Means for Solving the Problems]
In such a tension adjusting device for an automatic door driving belt according to the present invention, the endless driving belt is wound between pulleys, one end of the driving belt is fixed to the door side, and the other end is pulled. In the automatic door drive belt tension adjusting device constructed as described above, the support plate is pivotally attached to the support plate by a support plate fixed to the upper end of the door and a support shaft substantially parallel to the rotation axis of the drive belt. And an adjustment wheel for engaging the other end of the drive belt with the outer peripheral surface, and a fixing means for engaging and disengaging the rotation of the adjustment wheel, and the drive belt is a V belt made of an elastic member. The adjustment wheel has a claw wheel shape in which a plurality of claws that bite the V-belt are formed on the outer periphery thereof, and an engaging portion is integrally provided on the front surface of the hand, and a tool is engaged with the engaging portion. Are configured to rotate together. Means is a shank screw for fastening the adjustment wheel to the shaft, by tightening or loosening of the shaft portion screw head of the shank screw is disengaged the rotation of the adjustment wheel, Further, a fixing screw that penetrates the side surface of the adjusting wheel and has an arc-shaped elongated hole inserted through the arc-shaped elongated hole, the fixing screw is screwed to the support plate, and the fixing screw is tightened or loosened. The head of the fixing screw is configured to engage and disengage the rotation of the adjustment wheel .
Here, the engagement portion is, for example, a configuration in which the shaft portion of the adjustment wheel protrudes to the front side, and the outer periphery of the protruding shaft portion is chamfered so that a spanner or the like can be engaged. It includes a configuration in which two target holes are provided on the side surface with respect to the support shaft, and a bifurcated tool can be engaged with these holes.
[0006]
According to the present invention, the shaft screw is loosened, and the tool is engaged with the engaging portion on the front surface of the hand of the adjustment wheel with the handle portion being substantially perpendicular to the support shaft, and the tool is used to When the adjusting wheel is rotated in the pulling direction of the V-belt, the adjusting wheel rotates by the rotation angle of the tool while the outer peripheral surface bites into the V-belt, and pulls the driving belt without twisting. Then, by tightening the shaft screw, the adjustment wheel is clamped between the head of the shaft screw and the support plate, so that the rotation of the adjustment wheel is locked, so that the tension is applied to the V-belt. Fixed .
In addition to fixing the adjusting wheel with the shaft screw , the adjusting wheel is clamped between the head of the fixing screw and the support plate by tightening the fixing screw, so the adjusting wheel is fixed twice. Is done. In addition, since the hole through which the fixing screw is inserted is an arc-shaped elongated hole, the rotated adjustment wheel can be locked at an arbitrary position within the range of the arc-shaped elongated hole, and the adjustment wheel is pivoted on its axis. Since it is locked at a place away from the heart, the adjusting wheel is fixed more firmly by the action of the moment.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0008]
1 to 5 show particularly fixing means of the tension adjusting device according to the present invention, FIG. 6 shows an embodiment of the present invention, and FIG. 7 shows another example of the tension adjusting device according to the present invention. FIG. 8 shows an automatic door to which the tension adjusting device according to the present invention is applied.
[0009]
The tension adjusting device 10 is provided on the driving belt 1 that opens and closes the doors a1 and a1 'at the upper part of the double door automatic door A, and includes a support plate 3, an adjusting wheel 4, a fixing means 5, and a guide. And a member 6.
[0010]
The driving belt 1 is an end toothed belt made of an elastic member such as rubber (hereinafter referred to as reference numeral 1), and a pulley a3 on the driving source a2 side and a pulley on the driven side above the automatic door A. One end (hereinafter referred to as “fixed side end”) is screwed to the support plate 3 by the bracket 13 and the other end (hereinafter referred to as “traction side end”) is provided on the support plate 3. It is pulled by the adjusting wheel 4.
It should be noted that the position where the fixed side end is fixed may not be the support plate 3 as described above, but may be another portion on the door a1 side where the support plate 3 is fixed.
[0011]
As shown in FIG. 2, the support plate 3 is a metal plate bent into a vertical crank shape, and its lower end is fixed to a horizontal bar 102 integrally fixed to the upper end of one door a1 with screws. It is.
[0012]
The adjustment wheel 4 has a gear shape in which a plurality of teeth 4a meshing with the teeth of the toothed belt 1 are formed on the outer periphery thereof, and a plurality of arc-shaped long holes 4b are formed on a side surface of the adjustment wheel 4. And the shaft hole 4c is penetrated in the center portion to form a protruding edge portion 4d projecting the outer edge portion on the near side of the shaft hole 4c, and A parallel engaging portion 24 is formed on the peripheral side surface of the projecting edge portion 4d by chamfering two surfaces substantially parallel to each other across the axis.
The adjustment wheel 4 has a support shaft 3 fitted with a support shaft 23 substantially parallel to the rotation shaft of the toothed belt 1 (the pulleys a3 and a4), and a shaft hole is formed in the support shaft 23. 4c is attached so that it can be rotated.
[0013]
The fixing means 5 includes a shaft screw 15 and a fixing screw 25, and engages / disengages rotation of the adjustment wheel 4.
[0014]
The shaft screw 15 is a bolt in which the adjusting wheel 4 is fixed to the support shaft 23 via a spring washer and a washer, and is adjusted by being tightened by engaging a tool such as a spanner on its head. The rotation of the wheel 4 is disengaged. That is, when the shaft screw 15 is tightened, the adjustment wheel 4 is locked in order to hold the adjustment wheel 4 between the head of the shaft screw 15 and the support plate 3, and the shaft screw When 15 is loosened, the clamping state is released, and the adjustment wheel 4 can be rotated.
[0015]
The fixing screw 25 is a bolt that is inserted into the arc-shaped elongated hole 4b of the adjustment wheel 4 through the spring washer and the washer and screwed into the screw hole 3a formed in the support plate 3, and has a spanner or the like on its head. The rotation of the adjusting wheel 4 is engaged / disengaged by engaging and tightening the tool. That is, when the fixing screw 25 is tightened, the adjusting wheel 4 is held between the head of the fixing screw 25 and the support plate 3 so that the adjusting wheel 4 is locked and the fixing screw 25 is loosened. When the holding state is released, the adjustment wheel 4 can be freely rotated within the range of the arc length of the arc-shaped elongated hole 4b, and when the fixing screw 25 is loosened and removed, The adjustment wheel 4 can be rotated 360 degrees.
Note that a plurality of screw holes 3a are formed on the support plate 3 facing the arc-shaped elongated holes 4b, and the fixing screw 25 is inserted into any of the plurality of arc-shaped elongated holes 4b and the plurality of screw holes 3a. The position where the adjusting wheel 4 is locked can be selected by screwing on either of them.
[0016]
Further, since both the shaft screw 15 and the fixing screw 25 independently lock the adjusting wheel 4, the fixing means 5 may have only one of the shaft screw 15 and the fixing screw 25. However, in the tension adjusting device 10 according to the present embodiment, the shaft screw 15 for fixing the shaft center portion in order to more reliably lock the adjusting wheel 4 in a state where the toothed belt 1 is tensioned. And a fixing screw 25 that is more firmly fixed by the action of the moment at a position away from the axial center.
[0017]
The guide member 6 includes a first guide member 16 and a second guide member 26.
[0018]
The first guide member 16 is a metal piece formed so as to form a passage of the toothed belt 1 meshed with the adjusting wheel 4 between the first guiding member 16 and the support plate 3 below the adjusting wheel 4. Screwed so as to be substantially parallel to the toothed belt 1 on the upper side, the pulling side end of the toothed belt 1 is introduced between the adjustment wheel 4 and the wheel 4.
[0019]
The second guide member 26 is a metal piece formed in substantially the same shape as the first guide member 16, and is screwed onto the support plate 3 so as to face the first guide member 16 with the adjustment wheel 4 interposed therebetween. The traction side end portion of the toothed belt 1 wound around the adjustment wheel 4 is guided from the space between the adjustment wheel 4 in the direction opposite to the introduction direction.
In addition, the material of the 1st guide member 16 and the 2nd guide member is not limited to the said metal piece, For example, a resin molding member may be sufficient.
[0020]
Next, the operation of the tension adjusting device 10 configured as described above will be described.
In a state where the shaft screw 15 and the fixing screw 25 are loosened, the pulling side end portion of the toothed belt 1 is introduced between the adjusting wheel 4 and the first guide member 16, and a spanner or the like as shown in FIG. When the general tool 7 is engaged with the parallel engaging portion 24 of the adjustment wheel 4 and the adjustment wheel 4 is rotated in the pulling direction of the toothed belt 1 (counterclockwise in FIG. 4), the adjustment wheel 4 While the outer peripheral teeth 4a are engaged with the teeth of the toothed belt 1, the general tool 7 is rotated by the rotation angle rotated, and the toothed belt 1 is pulled without being twisted. Then, the pulling side end portion of the toothed belt 1 wound around the adjusting wheel 4 is guided by the second guide member 26 in the direction opposite to the direction introduced by the first guide member 16. Therefore, the storing property of the toothed belt 1 terminal which becomes extra by being pulled is good.
Then, by tightening the shaft screw 15 and the fixing screw 25, the adjustment wheel 4 is fixed in a state where the tension is applied to the toothed belt 1.
[0021]
At the time of towing, the teeth of the toothed belt 1 and the teeth 4a of the adjusting wheel 4 mesh with each other, so that the toothed belt 1 is pulled without slipping, and the first guide member 16 and the second guide member are also pulled. 26 keeps the meshing state of the toothed belt 1 and the adjusting wheel 4 from slipping out.
[0022]
In the example shown in FIG. 4, the adjustment wheel 4 is rotated by a general tool such as a spanner. However, as shown in FIG. 5, by using a dedicated tool 8 in which the bifurcated portions 8 a and 8 a at the tip are bent in the same direction. The bifurcated portions 8 a and 8 a may be engaged with the hole-like engaging portions 14 and 14 of the adjustment wheel 4 to rotate the adjustment wheel 4.
The dedicated tool 8 is used for horizontal adjustment of the doors a1 and a1 'at other parts of the automatic door A. The hole diameters and hole pitches of the hole-like engaging portions 14 and 14 of the adjustment wheel 4 are as follows. With this setting, the tension adjusting device 10 of the present embodiment can also be used.
[0023]
Next, the tension adjusting device 20 of the present invention will be described with reference to FIG.
The tension adjusting device 20 replaces the above-described tension adjusting device 10 by replacing the toothed belt 1 with a V-belt 1 ′, replacing the adjusting wheel 4 with an adjusting wheel 4 ′, and replacing the supporting plate 3 with a supporting plate 3 ′. For the other parts having the same configuration as that of the tension adjusting device 10 described above, redundant description is omitted.
[0024]
The V-belt 1 ′ is a general V-belt having an end made of an elastic member such as rubber and having no teeth, and a pulley a3 on the driving source a2 side and a pulley a4 on the driven side above the automatic door A. One end is fixed to the support plate 3 ′ by the bracket 13, and the other end is pulled by the adjusting wheel 4 ′ provided on the support plate 3 ′.
[0025]
The adjustment wheel 4 ′ has a claw wheel shape in which a plurality of claws 4 a ′ that bite into the V-belt 1 ′ are formed on the outer periphery thereof, and a hole-like engagement portion 14 configured in the same manner as that of the adjustment wheel 4 described above. , A parallel engagement portion 24, an arc-shaped long hole 4b, a shaft hole 4c, and a protruding edge portion 4d.
The adjustment wheel 4 ′ is pivotally attached to the support plate 3 ′ with the same configuration as the tension adjustment device 10 described above.
[0026]
The support plate 3 ′ is a metal plate bent into a vertical cross section crank shape so as to have a horizontal surface 16 ′ on the labor side, and a horizontal bar 102 integrally fixed to the upper end of one door a <b> 1 at its lower end side. The horizontal surface 16 'is configured to introduce and guide the traction side end of the V-belt 1' between the adjustment wheel 4 'and the horizontal surface 16'. Therefore, the first guide member 16 in the tension adjusting device 10 described above is omitted, resulting in a more inexpensive configuration.
[0027]
In FIG. 6, there is no member for guiding the pulling side end portion of the V-belt 1 ′ in the direction opposite to the introduction direction, but the second guide member 26 described above is placed with the adjustment wheel 4 ′ interposed therebetween. These second guide members 26 are formed on the support plate 3 so as to face the horizontal surface 16 ′ or by forming a bent portion (not shown) by bending the upper side portion of the support plate 3 ′ toward the front side. Alternatively, the bent portion may be guided in a direction opposite to the direction in which the V-belt 1 ′ is introduced. In this case, as in the case of the tension adjusting device 10, the extra V-belt 1 ′ terminal is accommodated by traction. Good sex.
[0028]
Thus, in the tension adjusting device 20 having the above-described configuration, the pulling side end portion of the V-belt 1 ′ is disposed between the adjusting wheel 4 ′ and the horizontal surface 16 ′ in a state where the shaft screw 15 and the fixing screw 25 are loosened. Then, the general tool 7 or the dedicated tool 8 is engaged with the parallel engaging portion 24 or the hole-like engaging portions 14 and 14, and the adjusting wheel 4 ′ is moved in the pulling direction of the V-belt 1 ′ (the opposite direction in FIG. 6). When rotating clockwise, the adjusting wheel 4 'rotates the general tool 7 or the dedicated tool 8 by the rotation angle while the outer claw 4a' is biting into the V belt 1 ', and the V belt 1' Tow without twisting.
Then, by tightening the shaft screw 15 and the fixing screw 25, the adjustment wheel 4 ′ is fixed in a state where the tension is applied to the V-belt 1 ′.
[0029]
Next, the tension adjusting device 30 according to the embodiment shown in FIG. 7 will be described.
In contrast to the tension adjusting device 10 described above, the tension adjusting device 30 replaces the toothed belt 1 with a V-belt 1 ′, replaces the adjusting wheel 4 with an adjusting wheel 4 ″, and further replaces the support plate 3 with the support plate 3 ″. The other parts having the same configuration as that of the tension adjusting device 10 described above are not described repeatedly.
[0030]
The V belt 1 ′ is the same V belt as described in the configuration of the tension adjusting device 20, and is wound between the pulley a3 on the driving source a2 side and the pulley a4 on the driven side at the upper part of the automatic door A, One end thereof is fixed to a support plate 3 ″ by a bracket 13 (not shown), and the other end is pulled by an adjusting wheel 4 ″ provided on the support plate 3 ″.
[0031]
The adjusting wheel 4 ″ has a bevel-shaped wheel shape having a small-diameter side surface and a large-diameter side surface having a large diameter with respect to the surface, and a hole-shaped engaging portion configured in the same manner as that of the adjusting wheel 4 described above. 14 (not shown), a parallel engaging portion 24 (not shown), an arc-shaped long hole 4b, a shaft hole 4c, and a protruding edge portion 4d.
The adjusting wheel 4 ″ is pivotally attached to the support plate 3 ″ so that the side surface on the small diameter side can turn toward the support plate 3 ″ by the same configuration as the tension adjusting device 10 described above.
In the example shown in FIG. 7, the outer peripheral surface of the adjustment wheel 4 ″ is a flat surface, but a plurality of claws, teeth, etc. may be provided to strengthen the engagement with the V-belt 1 ′. .
[0032]
The support plate 3 ″ has a horizontal member 33 having an L-shaped vertical cross-section with one piece screwed to the front surface of the horizontal bar 102, and an upright substantially at the center of the upper surface of the other piece of the horizontal member 33. And a horizontal member 16 ″ that protrudes toward the front side (left side in FIG. 7) of the horizontal member 33 and the adjustment wheel 4 ″. The pulling side end portion of the V-belt 1 'is introduced and guided, so that the first guide member 16 in the tension adjusting device 10 described above is omitted.
[0033]
In FIG. 7, there is no member for guiding the pulling side end portion of the V-belt 1 ′ in the direction opposite to the introduction direction. However, like the above-described tension adjusting device 20, the second guide member 26 is connected to the vertical member 43. Alternatively, the bent portion (not shown) may be formed on the upper side portion of the vertical member 43. In this case, it is a matter of course that the same effects as the above-described two modes can be obtained.
[0034]
Thus, in the tension adjusting device 30 having the above-described configuration, the pulling side end portion of the V-belt 1 ′ is placed between the adjusting wheel 4 ″ and the horizontal surface 16 ″ in a state where the shaft screw 15 and the fixing screw 25 are loosened. When the general tool 7 or the dedicated tool 8 is engaged with the parallel engagement portion 24 or the hole-like engagement portions 14 and 14 and the adjustment wheel 4 ″ is turned in the pulling direction of the V belt 1 ′, the adjustment is performed. The wheel 4 ″ is rotated by the rotation angle obtained by rotating the general tool 7 or the dedicated tool 8 while holding the V belt 1 ′ between the outer peripheral surface and the horizontal surface 16 ″ and twists the V belt 1 ′. At this time, the V-belt 1 ′ does not fall off outwardly because the adjustment wheel 4 ″ has the large-diameter portion outside, and the outer peripheral surface of the adjustment wheel 4 ″ and the horizontal surface 16 ”Because it is compressed locally with the There.
Then, by tightening the shaft screw 15 and the fixing screw 25, the adjustment wheel 4 ″ is fixed in a state where the tension is applied to the V-belt 1 ′.
[0035]
In the tension adjusting device 20 and the tension adjusting device 30 described above, the driving belt is an inexpensive V-belt 1 ′, and the guide member for introducing and guiding the V-belt 1 ′ is the support plate support plate 3 ′ or the support plate. Since it is integrated with 3 ″, a cheaper tension adjusting device can be provided.
[0036]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
Since the adjustment wheel rotates about a support shaft that is substantially parallel to the rotation axis of the V-belt, the adjustment belt is not twisted and the adjustment wheel is rotated by a tool. Since the arc length of the outer circumference of the wheel directly becomes the pulling amount of the V-belt, the pulling amount of the V-belt per rotation angle where the tool is rotated is larger than that of the conventional one, and the side of the wheel for adjusting the tool ( Since it only needs to be rotated parallel to the front side surface, the handle portion of the tool does not hit the members such as the driving belt and the horizontal bar at the top of the door in the vertical direction, and the workability is good.
Moreover, the fixing means is a shaft screw for fixing the adjustment wheel to the support shaft, so that the rotation of the adjustment wheel can be engaged and disengaged with a simple and inexpensive structure, and the rotation angle to be locked is free. It becomes.
Further, as a fixing means, the rotating adjustment wheel is rotated by adding a configuration in which an arc-shaped long hole is penetrated in the side surface of the adjusting wheel and a fixing screw inserted through the arc-shaped long hole is screwed to the support plate. In addition to being able to engage and disengage at an arbitrary position of the arc-shaped elongated hole, the adjustment wheel is locked at a position away from the axis, so that the adjustment wheel can be fixed more firmly by the action of the moment, and the shaft The adjustment wheel can be reliably fixed together with the fixing means using the partial screw.
[Brief description of the drawings]
FIG. 1 is a front view showing particularly a fixing means of a tension adjusting device according to the present invention.
2 is a sectional view taken along line (2)-(2) in FIG.
FIG. 3 is a perspective view showing the tension adjusting device.
FIG. 4 is a front view showing a state in which the adjustment wheel is rotated by a general tool.
FIG. 5A is a perspective view showing a dedicated tool for rotating an adjustment wheel;
(B) is a front view which shows the state which is rotating the adjustment wheel with the exclusive tool.
FIG. 6 is a front view showing a tension adjusting device of the present invention.
FIG. 7 is a side view showing another example of the tension adjusting device according to the present invention.
FIG. 8 is a front view showing an automatic door to which the tension adjusting device of the present invention is applied.
FIG. 9 is a front view showing a conventional tension adjusting device.
[Explanation of symbols]
A: Automatic door 1 ': V belt (drive belt)
3 ′: Support plate 4 ′: Adjustment wheel 4a ′: Claw 4b: Arc-shaped long hole 5: Fixing means 20: Tension adjusting device 14: Hole-shaped engagement portion 15: Shaft screw 23: Support shaft 24: Parallel engagement Joint part 25: fixing screw

Claims

In a tension adjusting device for an automatic door driving belt configured to wind a closed driving belt between pulleys, fix one end of the driving belt to the door side, and pull the other end. A support plate fixed to the upper end and a support shaft that is substantially parallel to the rotation axis of the drive belt are pivotally mounted on the support plate, and the other end of the drive belt is engaged with the outer peripheral surface. And an adjustment wheel for fixing, and a fixing means for engaging and disengaging the rotation of the adjustment wheel,
The driving belt is a V-belt made of an elastic member,
The adjustment wheel has a claw-like shape in which a plurality of claws that bite the V-belt are formed on the outer periphery thereof, and an engagement portion is integrally provided on the front surface of the hand, and a tool is engaged with the engagement portion. Configured to rotate,
The fixing means is a shaft screw that fastens the adjusting wheel to the support shaft, and the head of the shaft screw engages and disengages the rotation of the adjusting wheel by loosening of the shaft screw. Further, a fixing screw that penetrates the side surface of the adjustment wheel through an arc-shaped elongated hole and is inserted through the arc-shaped elongated hole, the fixing screw is screwed to the support plate, and the fixing screw is tightened. A tension adjusting device for an automatic door driving belt, characterized in that the head of the fixing screw loosely engages and disengages rotation of the adjusting wheel .