JP4472140B2 - Powder feeder - Google Patents

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JP4472140B2
JP4472140B2 JP2000280212A JP2000280212A JP4472140B2 JP 4472140 B2 JP4472140 B2 JP 4472140B2 JP 2000280212 A JP2000280212 A JP 2000280212A JP 2000280212 A JP2000280212 A JP 2000280212A JP 4472140 B2 JP4472140 B2 JP 4472140B2
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supply pipe
seal member
peripheral surface
powder
outer peripheral
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JP2002087407A (en
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久勝 加藤
直行 江口
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、たとえばアルミナなどの粉体を、容器内に供給するための粉体供給装置に関する。
【0002】
【従来の技術】
典型的な先行技術は、図6に示される。ホッパ1の下部に連なる供給管2は、可撓性袋である容器3の口部4内に挿入され、この口部4の外方から固定金具5によって口部4が供給管2の外周面に締め付けられて気密にシールされる。こうして容器3内に粉体が供給されて貯留される。
【0003】
図6の先行技術では、作業者が固定金具5を操作して容器3の筒状口部4を供給管2に装着し、容器3内に粉体を供給した後には、固定金具5を取外し、口部4を供給管2から取外す。したがって作業性が悪いという問題がある。粉体の粒径が小さいとき、固定金具5による口部4の供給管2への気密性が劣るとき、粉体が空気中に浮遊し、作業環境が悪くなるとともに、周囲が汚損される。
【0004】
他の先行技術は、特公平5−41528号公報に開示される。この先行技術では、粉体が供給される導管が容器内に部分的に挿入され、導管のまわりに配置された天然ゴムから成る膨張、収縮可能な環状体が膨張され、気密性が達成される。この先行技術によれば、環状体によってシール性が容易に達成され、作業性が良好である。この先行技術の新たな問題は、作業者が容器内に導管を挿入する作業を行う際、環状体が容器と接触するなどして、環状体が摩耗し、損傷しやすく、耐久性が劣るということである。
【0005】
【発明が解決しようとする課題】
本発明の目的は、作業性が良好であり、耐久性が優れた粉体供給装置を提供することである。
【0006】
【課題を解決するための手段】
本発明は、粉体を供給する供給端部を有し、この供給端部が、容器内に挿入される供給管と、
供給管の供給端部付近で、管軸に沿って間隔をあけて固定され、供給管の全周にわたって供給管の外方に突出する一対の保護部材と、
一対の保護部材間で、供給管を囲む可撓性を有する環状中空のシール部材であって、内部に流体圧が供給されないとき、シール部材が保護部材から外方に突出せず、内部に流体圧が供給されることによって、シール部材が保護部材よりも外方に突出して膨張し、容器の内周面に接触するシール部材と、
シール部材に流体を供給、排出する流体源とを含み、
供給管は、直円筒状であり、
各保護部材には、供給管が挿通して固定され、
保護部材の外周面が、供給管と同軸の円形に形成され、
シール部材の膨張時において、シール部材の外周面は、一対の保護部材の相互に対向する各内面、および、保護部材間における供給管の外周面に密着することを特徴とする粉体供給装置である。
【0007】
本発明に従えば、粉体を容器内に供給する供給管の供給端部付近には、たとえば後述の図1に示されるように、上下に間隔をあけて配置された上下一対の保護部材17,18が固定され、この保護部材間に、可撓性シール部材19が配置される。
【0008】
シール部材に圧縮空気などの流体圧を供給しない状態では、シール部材の外周面19aは、保護部材の外周面31,32とほぼ同一位置または保護部材の外周面よりも内方にあり、すなわちシール部材の外周面19aは、保護部材の外周面31,32から外方に突出しておらず、したがって粉体が供給されるべき容器の口部26内に、供給管の供給端部、一対の保護部材およびシール部材を挿入した状態とする。次にこの状態で、シール部材内に圧縮空気などの流体圧を供給することによって、シール部材が膨張し、シール部材の外周面19aは、保護部材の外周面31,32よりも外方に突出し、容器の口部の内周面に接触し、気密性が達成される。この気密状態で、供給管の供給端部から粉体を容器内に装入する。シール部材の膨張した外周部は、容器の内周面に全周にわたって密着しているので、粉体が外方に漏洩するおそれはない。
【0009】
シール部材は、たとえばゴム、合成樹脂などの可撓性を有する袋体から成り、さらに弾発性を有していてもよい。容器内に粉体を供給した後、シール部材からの流体圧を除去することによって、シール部材が収縮し、容器を供給管の供給端部から取外すことができる。
【0010】
流体圧を供給、排出する流体源は、前述のように圧縮空気を供給するように構成されていてもよいけれども、そのほかの気体を供給するように構成されてもよく、または水などの液体を供給するように構成されてもよい。
【0011】
シール部材は一対の剛性の保護部材によって、管軸方向の変位が阻止されるので、シール部材内に流体圧を供給したとき、そのシール部材が保護部材から外方に大きく突出し、容器の内周面に密着させることが確実であり、シール部材の小形化を図ることができる。
【0012】
また粉体供給装置において、供給管は、直円筒状であり、各保護部材には、供給管が挿通して固定され、保護部材の外周面が、供給管と同軸の円形に形成される。そして、シール部材の膨張時において、シール部材の外周面は、保護部材の相互に対向する各内面、および、保護部材間における供給管の外周面に密着する。
【0013】
円筒状供給管は、たとえば鉛直であってもよい管軸16を有し、保護部材を挿通し、保護部材が供給管に固定される。各保護部材の外周面は、管軸と同軸の円形であり、シール部材内に流体圧が供給されて膨張した状態では、シール部材の外周面は、前述のように容器の内周面に接触する。このシール部材の外周面19b,19cはまた、一対の保護部材の相互に対向する各内面17a,18aに密着し、こうして容器が密封される。さらにシール部材の外周面19dが供給管の外周面12aに密着し、容器内が密封される。こうして容器内の粉体が外部に漏洩することが確実に防がれる。
【0014】
また本発明は、保護部材の外周面は、外方に凸の弯曲した形状を有することを特徴とする。
【0015】
本発明に従えば、保護部材の外周面を外方に凸の弯曲した丸みを帯びた形状とし、これによってその保護部材の外周面が容器の内周面に当接しても、容器の内周面が損傷することを防ぐことができる。このことは特に、容器が可撓性合成樹脂製フィルムなどから成る容器であるとき、損傷を防ぐために、重要である。
【0016】
また本発明は、供給管は、
粉体を供給する供給管本体と、
供給管本体を、その供給端部付近で全周にわたって囲む筒体であって、供給管本体の外周面との間に環状の排気通路を形成し、この筒体に保護部材が固定されるとともに、この筒体をシール部材が囲む筒体とを有し、
排気通路に、誘引ファンが接続されることを特徴とする。
【0017】
本発明に従えば、図4に関連して後述されるように、供給管は、粉体を供給する供給管本体と、その外方に同軸に配置される筒体とを含む2重管状に構成され、供給管本体の外周面と筒体の内周面との間の環状の排気通路42を、誘引ファンに接続する。これによって、容器の口部付近の粉体が、外方に浮遊するなどして漏洩することを防ぎ、また容器内で飛散する粉体が外部に漏洩することを防ぎ、排気通路から誘引ファンで排出する。
【0018】
また本発明は、筒体には、保護部材よりも外方に拡がった形状を有するカバーが、保護部材よりも供給管の管軸方向内方に固定され、
カバーよりも保護部材側の空間は、前記誘引ファンに連通されることを特徴とする。
【0019】
本発明に従えば、図5に関連して後述されるように、容器の口部付近の外方をカバーによって覆い、このカバーによって覆われる空間49を、誘引ファンに連通する。こうして容器の口部から外方に粉体がたとえ漏れたとしても、その漏れた粉体を、カバー内の空間から誘引ファン側に吸引することができる。こうして作業者の作業空間内に、粉体が飛散、浮遊して、作業環境が悪化することが防がれる。
【0020】
また本発明は、カバーは、
筒体の外周面に固定される環状板と、
この環状板の外周部から保護部材に向かって延び、筒体に同軸である集塵筒とを有し、
筒体には、環状板付近の保護部材寄りで、集塵筒内と排気通路とを連通する集塵孔が形成されることを特徴とする。
【0021】
本発明に従えば、カバーは、環状板と、その環状板を底として保護部材に向かって延びて容器の口部付近を覆う集塵筒とを有し、こうしてカバーは、供給管が挿通された帽状に形成される。したがって外部に漏洩する粉体をカバー内で吸引し、集塵孔から排気通路42に導く。こうして作業空間内に容器から粉体が漏洩して飛散、浮遊することをさらに一層確実に防ぐことができる。
【0022】
【発明の実施の形態】
図1は、本発明の実施の一形態の全体の構成を示す簡略化した断面図である。アルミナなどの粉体は、ホッパ11に供給され、このホッパ11の下部に設けれられた供給管12から供給端部13を経て、容器14内に装入される。供給管12の上部には、開閉動作して粉体を切出すフィーダ15が設けられる。供給管12は、直円筒状であり、鉛直の管軸16を有する。容器14内に供給される粉体が外部に漏洩することを防ぐために、供給管12の供給端部13付近には、管軸16に沿って図1の上下に間隔をあけて固定される一対の剛性の保護部材17,18と、これらの保護部材17,18間で供給管12を囲むシール部材19とが設けられる。保護部材17,18には、供給管12が貫通し、これらの保護部材17,18は供給管12に固定される。保護部材17,18は、供給管12の全周にわたって供給管12の外方に突出し、環状の板から成る。シール部材19は、可撓性を有するゴムまたは合成樹脂などの材料から成り、環状中空である。シール部材19は、弾発性を有していてもよい。
【0023】
このシール部材19には、流体源である圧縮空気源21から管路22を経て圧縮空気が供給され、また排出される。圧縮空気源21は、圧縮空気を供給するポンプなどの供給源23と、シール部材19に接続された管路22を圧縮空気供給源23に接続し、または大気開放する2位置切換え弁24とを含む。
【0024】
容器14は、可撓性を有する合成樹脂などのフィルムまたはシートによって構成されてもよく、または剛性であってもよく、床25上に配置され、この容器14の直円筒状の口部26内に、供給管12の供給端部13と、保護部材17,18とシール部材19とが挿入される。フィーダ15が開かれることによって、供給端部13の下端から粉体が容器14内に装入されて貯留される。
【0025】
図2は、シール部材19内に圧縮空気を供給し、供給管12の供給端部13から粉体を容器14内に供給するときの状態を示す拡大断面図である。シール部材19内に圧縮空気が供給され、これによってシール部材19が膨張し、これによってシール部材19の半径方向外方の外周面19aは、容器14の口部26の内周面28に密着する。シール部材19の膨張時、このシール部材19の図2における上下の外周面19b,19cは、一対の保護部材17,18の相互に対向する各内面17a,18aに密着する。これによって容器14の内部の空間の気密性が達成される。さらにこのシール部材19の膨張時、半径方向内方の外周面19dは、保護部材17,18間における供給管12の外周面12aに密着し、このことによってもまた、気密性が確保される。
【0026】
本発明の実施の他の形態では、膨張しているシール部材19の外周面19b,19cが保護部材17,18の各内面17a,18aに当接し、このとき外周面19dと供給管12の外周面12aとは、隙間が存在していてもよい。本発明の実施のさらに他の形態では、膨張しているシール部材19の外周面19b,19cは、保護部材17,18の各内面17a,18aと間隙を有し、外周面19dは、供給管12の外周面12aに密着し、これによって気密性が確保されてもよい。
【0027】
保護部材17,18は同一構成を有し、それらの外周面31,32は、供給管12と同軸の円形に形成され、外径D1を有する。シール部材19に圧縮空気が供給されて膨張した状態では、シール部材19は保護部材17,18よりも半径方向外方(図2の左右方向)に突出し、図2では外径D2で示され(D1<D2)、その外周面19aが前述のように口部26の内周面28に密着している。
【0028】
保護部材17,18の外周面31,32は、外方に凸の湾曲した丸みをおびた形状を有する。したがって容器14の口部26に挿入される際、口部26を損傷するおそれがない。容器14が前述のように比較的薄いフィルム状の材料から成るとき、容器14が損傷されないので、粉体の漏洩を確実に防ぐことができる。
【0029】
図3は、シール部材19内の圧縮空気を排出し、大気圧とした自然状態を示す一部の断面図である。シール部材19の半径方向外方の外周面19aは、管軸16を中心として外径D3を有し、この外径D3は、保護部材17,18の外周面31,32の外径D1以下である(D3≦D1)。したがってシール部材19側の半径方向外方の外周面19aは、保護部材17,18の外周面31,32とほぼ同一位置または保護部材17,18よりも半径方向内方に存在する。したがって図3のようにシール部材19に圧縮空気を供給されない状態で、容器14の口部26内に供給管12の供給端部13、保護部材17,18およびシール部材19を挿入し、この状態で切換え弁24を切換えて圧縮空気を供給することによって、図1および図2に示されるようにシール部材19による容器14の気密性が達成される。こうした気密性が達成された状態で、供給管12から粉体が供給される。
【0030】
図4は、本発明の実施の他の形態の一部を示す断面図である。この図4に示される実施の形態は、前述の図1〜図3に示される実施の形態に類似し、対応する部分には同一の参照符を付す。ホッパ11に上端部が接続され、フィーダ15が介在される供給管38は、そのフィーダ15を介して粉体を供給する直円筒状の供給管本体39と、この供給管本体39を、その供給端部13付近で全周にわたって囲む直円筒状の筒体41とを有する。供給管本体39と筒体41とは、鉛直な管軸16を有し、同軸であって、2重管構造を有する。
【0031】
供給管本体39の外周面と筒体41との内周面との間には、環状の排気通路42が形成される。排気通路42の上端部は、環状の端板43によって閉塞される。排気通路42には、排気管44を介して誘引ファン45が接続され、これによって排気通路42は、負圧とされる。したがって容器14内に装入された粉体は、排気通路42が負圧に保たれることによって、その粉体がシール部材19と口部26との間の隙間などを経て外部に漏洩することが確実に防がれ、このような外部に漏洩するおそれのある粉体は、排気通路42から排気管44を経て外部に取出される。したがって作業者の作業空間に、粉体が漏洩して飛散、浮遊するおそれはない。図4に示される実施の形態のそのほかの構成と動作は、前述の実施の形態と同様である。
【0032】
図5は、本発明の実施のさらに他の形態の一部の断面図である。この図5に示される実施の形態は、前述の図4の実施の形態に類似し、対応する部分には同一の参照符を付す。注目すべきは、この実施の形態では、カバー48が設けられる。カバー48は、保護部材17,18よりも供給管38の管軸16方向の内方(図5の上方)に配置され、それらの保護部材17,18よりも半径方向外方に拡がった形状を有する。カバー48よりも保護部材17,18側の空間49は、集塵筒51を介して排気通路42に連通する。
【0033】
カバー48は、供給筒38の筒体41の外周面に固定される環状板53と、この環状板53の外周部から保護部材17,18に向かって図5の下方に延びる集塵筒54とを有する。集塵筒54は、筒体41、したがって供給管38と共通の管軸16を有し、同軸である。集塵孔51は、筒体41に、環状板53付近で保護部材17,18寄り(図5の下方)で、形成される。
【0034】
図5の実施の形態では、容器14内に粉体を供給した後、シール部材19への圧縮空気を排出したとき、粉体が外部に漏洩したとしても、そのような粉体は、カバー48内の空間49内から、集塵孔51を経て排気通路42から排気管44を通り、外部に吸引される。したがって作業者の作業空間が、粉体によって汚損することはない。図5において、筒体54の内径は、保護部材17,18および膨張時のシール部材19の外径よりも、半径方向外方にさらに間隔をあけて大きく形成される。筒体54の端部56は、保護部材17,18およびシール部材19と、管軸16方向にほぼ同一位置であってもよいけれども、それよりも上方または下方に位置していてもよい。
【0035】
本発明の実施の他の形態では、供給管12,38は、直円筒状以外の筒状の形状を有してもよく、たとえば角筒状であってもよい。管軸16は、鉛直であってもよいが、斜めまたは水平であってもよい。圧縮空気に代えて、そのほかの気体が用いられてもよく、または液体が用いられてもよい。保護部材17,18は、前述のように環状の板であってもよいが、そのほかの構成であってもよく、たとえば板に代えて網でもよく、さらに板でなくてもよい。
【0036】
【発明の効果】
請求項1の本発明によれば、供給管の供給端部付近に固定された一対の保護部材間に環状中空のシール部材を配置し、このシール部材内に流体圧を供給しない状態では、シール部材が容器などに接触することはなく、そのシール部材の摩耗を、損傷を防ぐことができる。シール部材に流体圧を供給して保護部材よりも外方に突出することによって、そのシール部材が容器の内周面に接触し、容器内の気密性が達成され、したがって粉体が外部に漏洩することが防がれる。こうして比較的簡単な構成によって、しかもシール部材に流体圧を供給、排出するという簡単な操作で、供給管から容器に粉体を供給して装入することができる。また上述のように、シール部材が摩耗、損傷せず、耐久性が向上される。またシール部材が、一対の保護部材間に配置され、これによってシール部材を、保護部材の外方に大きく突出することが可能となり、しかもシール部材の小形化を図ることができる。
【0037】
また、シール部材内に流体圧を供給して膨張した状態では、そのシール部材の外周面は容器の内周面に前述のように接続するとともに、さらにこのシール部材の外周面は、一対の保護部材の対向内面に接触し、供給管の外周面に接触し、こうして容器内の気密性が達成される。したがって粉体の外部への漏洩が防がれる。
【0038】
請求項の本発明によれば、保護部材の外周面を外方に凸の弯曲した丸みを帯びた形状とし、したがってこの保護部材の外周面に、容器の口部などが接触しても、損傷することはなく、粉体の供給が確実になる。
【0039】
請求項の本発明によれば、供給管を供給管本体と筒体との2重管構造とし、筒体内の排気通路を誘引ファンによって負圧とすることによって、粉体の外部空間への飛散、浮遊を防ぐことが確実になる。
【0040】
請求項の本発明によれば、カバーによって覆われる空間を、誘引ファンに連通し、このことによって、たとえ粉体が外部に漏洩しても、カバー内で吸引され、作業者の作業空間に、漏洩した粉体が飛散浮遊することを防ぐことができる。
【0041】
請求項の本発明によれば、環状板と集塵筒とを有する帽状カバーを用いることによって、外部に漏洩した粉体を確実に吸引して捕捉することができるとともに、集塵孔は、筒体に形成されるので、カバー内の空間を負圧とすることが容易であり、しかもこの集塵孔は環状板付近の保護部材寄りに形成されるので、カバー内の漏洩した粉体を確実に吸引して捕捉することが確実である。
【図面の簡単な説明】
【図1】本発明の実施の一形態の全体の構成を示す簡略化した断面図である。
【図2】シール部材19内に圧縮空気を供給し、供給管12の供給端部13から粉体を容器14内に供給するときの状態を示す拡大断面図である。
【図3】シール部材19内の圧縮空気を排出し、大気圧とした自然状態を示す一部の断面図である。
【図4】本発明の実施の他の形態の一部を示す断面図である。
【図5】本発明の実施のさらに他の形態の一部の断面図である。
【図6】先行技術を示す断面図である。
【符号の説明】
11 ホッパ
12,38 供給管
13 供給端部
14 容器
16 管軸
17,18 保護部材
19 シール部材
21 圧縮空気源
39 供給管本体
41 筒体
42 排気通路
45 誘引ファン
48 カバー
53 環状板
54 集塵筒
51 集塵孔
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a powder supply apparatus for supplying powder such as alumina into a container.
[0002]
[Prior art]
A typical prior art is shown in FIG. The supply pipe 2 connected to the lower part of the hopper 1 is inserted into the mouth part 4 of the container 3 which is a flexible bag, and the mouth part 4 is connected to the outer peripheral surface of the supply pipe 2 by a fixing metal 5 from the outside of the mouth part 4. Tightened to be hermetically sealed. In this way, the powder is supplied and stored in the container 3.
[0003]
In the prior art of FIG. 6, after the operator operates the fixing bracket 5 to attach the cylindrical mouth portion 4 of the container 3 to the supply pipe 2 and supply the powder into the container 3, the fixing bracket 5 is removed. The mouth 4 is removed from the supply pipe 2. Therefore, there is a problem that workability is poor. When the particle size of the powder is small, when the airtightness of the mouthpiece 4 to the supply pipe 2 by the fixing bracket 5 is inferior, the powder floats in the air, the working environment is deteriorated, and the surroundings are soiled.
[0004]
Another prior art is disclosed in Japanese Patent Publication No. 5-41528. In this prior art, a conduit to which powder is supplied is partially inserted into the container, and an inflatable, retractable annular body made of natural rubber disposed around the conduit is inflated to achieve hermeticity. . According to this prior art, sealing performance is easily achieved by the annular body, and workability is good. The new problem of this prior art is that when the operator performs the operation of inserting the conduit into the container, the annular body comes into contact with the container, and the annular body is worn and damaged easily, resulting in poor durability. That is.
[0005]
[Problems to be solved by the invention]
The objective of this invention is providing workability | operativity and the powder supply apparatus which was excellent in durability.
[0006]
[Means for Solving the Problems]
The present invention has a supply end for supplying powder, the supply end inserted into the container,
A pair of protective members that are fixed at intervals along the tube axis and project outward from the supply pipe over the entire circumference of the supply pipe, near the supply end of the supply pipe;
A flexible hollow seal member surrounding a supply pipe between a pair of protection members, and when no fluid pressure is supplied to the inside, the seal member does not protrude outward from the protection member, and the fluid is contained inside. By supplying pressure, the seal member protrudes outward from the protection member and expands, and the seal member contacts the inner peripheral surface of the container;
Supplying fluid to the seal member, seen including a fluid source for discharging,
The supply pipe has a right cylindrical shape,
A supply pipe is inserted and fixed to each protection member,
The outer peripheral surface of the protection member is formed in a circular shape coaxial with the supply pipe,
When the seal member is expanded, the outer peripheral surface of the seal member is in close contact with the inner surfaces of the pair of protective members facing each other and the outer peripheral surface of the supply pipe between the protective members. is there.
[0007]
According to the present invention, a pair of upper and lower protective members 17 are arranged in the vicinity of the supply end of the supply pipe for supplying the powder into the container, for example, as shown in FIG. , 18 are fixed, and a flexible sealing member 19 is disposed between the protective members.
[0008]
In a state where fluid pressure such as compressed air is not supplied to the seal member, the outer peripheral surface 19a of the seal member is substantially at the same position as the outer peripheral surfaces 31 and 32 of the protective member or inward of the outer peripheral surface of the protective member. The outer peripheral surface 19a of the member does not protrude outwardly from the outer peripheral surfaces 31 and 32 of the protective member. Therefore, the supply end of the supply pipe, a pair of protections are provided in the mouth portion 26 of the container to which the powder is to be supplied. The member and the seal member are inserted. Next, in this state, by supplying fluid pressure such as compressed air into the seal member, the seal member expands, and the outer peripheral surface 19a of the seal member protrudes outward from the outer peripheral surfaces 31 and 32 of the protective member. The container is brought into contact with the inner peripheral surface of the mouth portion to achieve airtightness. In this airtight state, the powder is charged into the container from the supply end of the supply pipe. Since the expanded outer peripheral portion of the seal member is in close contact with the inner peripheral surface of the container over the entire periphery, there is no possibility that the powder leaks outward.
[0009]
The seal member is made of a flexible bag body such as rubber or synthetic resin, and may have elasticity. After supplying the powder into the container, the fluid pressure from the seal member is removed, so that the seal member contracts and the container can be removed from the supply end of the supply pipe.
[0010]
The fluid source that supplies and discharges the fluid pressure may be configured to supply compressed air as described above, but may be configured to supply other gases, or a liquid such as water. It may be configured to supply.
[0011]
Since the seal member is prevented from being displaced in the tube axis direction by a pair of rigid protection members, when fluid pressure is supplied into the seal member, the seal member protrudes greatly from the protection member to the inner circumference of the container. It is reliable to make it adhere to the surface, and the seal member can be miniaturized.
[0012]
In addition the powder supply device, the supply pipe, a straight cylindrical, each protective member, the supply pipe is fixed by inserting outer peripheral surface of the protective member, Ru is formed into a circular feed pipe coaxial. At Rise Chotoki sealing member, the outer peripheral surface of the seal member, each inner surface facing each other of the protective member, and, you close contact with the outer peripheral surface of the supply pipe between the protective member.
[0013]
The straight cylindrical supply pipe has a pipe shaft 16 that may be vertical, for example, and is inserted through a protection member, and the protection member is fixed to the supply pipe. The outer peripheral surface of each protective member is a circle coaxial with the tube axis, and when the fluid pressure is supplied into the seal member and expanded, the outer peripheral surface of the seal member contacts the inner peripheral surface of the container as described above. To do. The outer peripheral surfaces 19b and 19c of the seal member are also in close contact with the inner surfaces 17a and 18a facing each other of the pair of protective members, thus sealing the container. Furthermore, the outer peripheral surface 19d of the sealing member is in close contact with the outer peripheral surface 12a of the supply pipe, and the inside of the container is sealed. This reliably prevents the powder in the container from leaking to the outside.
[0014]
Further, the invention is characterized in that the outer peripheral surface of the protective member has an outwardly convex bent shape.
[0015]
According to the present invention, the outer peripheral surface of the protective member has an outwardly convex and rounded shape, and even if the outer peripheral surface of the protective member comes into contact with the inner peripheral surface of the container, It is possible to prevent the surface from being damaged. This is particularly important for preventing damage when the container is made of a flexible synthetic resin film or the like.
[0016]
In the present invention, the supply pipe is
A supply pipe body for supplying powder;
A cylinder that surrounds the supply pipe main body over the entire circumference in the vicinity of the supply end, and an annular exhaust passage is formed between the supply pipe main body and the outer peripheral surface of the supply pipe main body, and a protective member is fixed to the cylinder The cylinder body is surrounded by a sealing member,
An induction fan is connected to the exhaust passage.
[0017]
According to the present invention, as will be described later with reference to FIG. 4, the supply pipe has a double tubular shape including a supply pipe main body for supplying powder and a cylindrical body arranged coaxially on the outside thereof. An annular exhaust passage 42 configured between the outer peripheral surface of the supply pipe body and the inner peripheral surface of the cylindrical body is connected to the induction fan. As a result, the powder near the mouth of the container is prevented from leaking due to floating outwards, etc., and the powder scattered in the container is prevented from leaking to the outside. Discharge.
[0018]
Further, in the present invention, a cover having a shape extending outward from the protective member is fixed to the tube body in the axial direction of the supply pipe rather than the protective member,
A space closer to the protection member than the cover is communicated with the attraction fan.
[0019]
According to the present invention, as will be described later with reference to FIG. 5, the outside near the mouth of the container is covered with a cover, and the space 49 covered by this cover is communicated with the attracting fan. Thus, even if the powder leaks outward from the mouth of the container, the leaked powder can be sucked from the space in the cover to the attracting fan side. Thus, it is possible to prevent the working environment from deteriorating due to powder scattering and floating in the working space of the worker.
[0020]
In the present invention, the cover is
An annular plate fixed to the outer peripheral surface of the cylindrical body;
Extending from the outer periphery of the annular plate toward the protective member, and having a dust collection cylinder that is coaxial with the cylinder,
The cylinder is formed with a dust collection hole that communicates the inside of the dust collection cylinder and the exhaust passage near the protective member near the annular plate.
[0021]
According to the present invention, the cover has an annular plate and a dust collecting cylinder that extends toward the protective member with the annular plate as a bottom and covers the vicinity of the mouth of the container, and thus the cover is inserted with the supply pipe. It is formed in a cap shape. Therefore, the powder that leaks to the outside is sucked in the cover and guided to the exhaust passage 42 from the dust collection hole. In this way, it is possible to more reliably prevent the powder from leaking from the container and scattering and floating in the work space.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a simplified cross-sectional view showing the overall configuration of an embodiment of the present invention. Powder such as alumina is supplied to the hopper 11, and is charged into the container 14 through a supply end 13 from a supply pipe 12 provided at a lower portion of the hopper 11. A feeder 15 that opens and closes and cuts out the powder is provided above the supply pipe 12. The supply pipe 12 has a right cylindrical shape and has a vertical pipe shaft 16. In order to prevent the powder supplied into the container 14 from leaking to the outside, a pair of pipes 16 are fixed in the vicinity of the supply end portion 13 of the supply pipe 12 along the pipe axis 16 at intervals in the vertical direction of FIG. The rigid protective members 17 and 18 and a seal member 19 surrounding the supply pipe 12 are provided between the protective members 17 and 18. The supply pipe 12 passes through the protection members 17 and 18, and these protection members 17 and 18 are fixed to the supply pipe 12. The protection members 17 and 18 protrude outward from the supply pipe 12 over the entire circumference of the supply pipe 12 and are formed of an annular plate. The seal member 19 is made of a material such as flexible rubber or synthetic resin, and has an annular hollow shape. The seal member 19 may have elasticity.
[0023]
Compressed air is supplied to the seal member 19 from a compressed air source 21 that is a fluid source via a conduit 22 and is discharged. The compressed air source 21 includes a supply source 23 such as a pump that supplies compressed air, and a two-position switching valve 24 that connects the pipeline 22 connected to the seal member 19 to the compressed air supply source 23 or opens the atmosphere. Including.
[0024]
The container 14 may be configured by a film or sheet such as a synthetic resin having flexibility, or may be rigid, and is disposed on the floor 25 and is disposed in the right cylindrical cylindrical portion 26 of the container 14. In addition, the supply end 13 of the supply pipe 12, the protective members 17 and 18, and the seal member 19 are inserted. By opening the feeder 15, the powder is charged into the container 14 from the lower end of the supply end 13 and stored.
[0025]
FIG. 2 is an enlarged cross-sectional view showing a state where compressed air is supplied into the seal member 19 and powder is supplied into the container 14 from the supply end 13 of the supply pipe 12. Compressed air is supplied into the seal member 19, thereby expanding the seal member 19, whereby the radially outer peripheral surface 19 a of the seal member 19 is in close contact with the inner peripheral surface 28 of the mouth portion 26 of the container 14. . When the seal member 19 is expanded, the upper and lower outer peripheral surfaces 19 b and 19 c of the seal member 19 in FIG. 2 are in close contact with the inner surfaces 17 a and 18 a facing each other of the pair of protective members 17 and 18. Thereby, the airtightness of the space inside the container 14 is achieved. Further, when the seal member 19 is expanded, the radially outer peripheral surface 19d is in close contact with the outer peripheral surface 12a of the supply pipe 12 between the protective members 17 and 18, and this also ensures airtightness.
[0026]
In another embodiment of the present invention, the outer peripheral surfaces 19b and 19c of the expanding seal member 19 abut on the inner surfaces 17a and 18a of the protection members 17 and 18, and at this time, the outer peripheral surface 19d and the outer periphery of the supply pipe 12 There may be a gap with the surface 12a. In still another embodiment of the present invention, the outer peripheral surfaces 19b and 19c of the expanding seal member 19 have gaps with the inner surfaces 17a and 18a of the protective members 17 and 18, and the outer peripheral surface 19d is a supply pipe. 12 may be in close contact with the outer peripheral surface 12a, thereby ensuring airtightness.
[0027]
The protection members 17 and 18 have the same configuration, and their outer peripheral surfaces 31 and 32 are formed in a circular shape coaxial with the supply pipe 12 and have an outer diameter D1. In a state where compressed air is supplied to the seal member 19 and the seal member 19 is expanded, the seal member 19 protrudes radially outward (left and right direction in FIG. 2) from the protective members 17 and 18, and is indicated by an outer diameter D2 in FIG. D1 <D2), and the outer peripheral surface 19a is in close contact with the inner peripheral surface 28 of the mouth portion 26 as described above.
[0028]
The outer peripheral surfaces 31 and 32 of the protection members 17 and 18 have outwardly convex curved rounded shapes. Therefore, there is no possibility of damaging the mouth portion 26 when inserted into the mouth portion 26 of the container 14. When the container 14 is made of a relatively thin film-like material as described above, the container 14 is not damaged, so that leakage of powder can be reliably prevented.
[0029]
FIG. 3 is a partial cross-sectional view showing a natural state in which the compressed air in the seal member 19 is discharged and atmospheric pressure is obtained. The outer peripheral surface 19a radially outward of the seal member 19 has an outer diameter D3 with the tube shaft 16 as the center, and this outer diameter D3 is less than or equal to the outer diameter D1 of the outer peripheral surfaces 31, 32 of the protection members 17, 18. Yes (D3 ≦ D1). Accordingly, the radially outer peripheral surface 19 a on the seal member 19 side is substantially at the same position as the outer peripheral surfaces 31 and 32 of the protective members 17 and 18 or radially inward of the protective members 17 and 18. Therefore, the supply end 13 of the supply pipe 12, the protection members 17, 18 and the seal member 19 are inserted into the mouth portion 26 of the container 14 in a state where compressed air is not supplied to the seal member 19 as shown in FIG. By switching the switching valve 24 and supplying compressed air, airtightness of the container 14 by the seal member 19 is achieved as shown in FIGS. The powder is supplied from the supply pipe 12 in a state where such airtightness is achieved.
[0030]
FIG. 4 is a sectional view showing a part of another embodiment of the present invention. The embodiment shown in FIG. 4 is similar to the embodiment shown in FIGS. 1 to 3 described above, and corresponding parts are denoted by the same reference numerals. A supply pipe 38 having an upper end connected to the hopper 11 and interposing the feeder 15 includes a straight cylindrical supply pipe main body 39 for supplying powder via the feeder 15, and the supply pipe main body 39. A cylindrical body 41 that surrounds the entire circumference in the vicinity of the end portion 13. The supply pipe main body 39 and the cylindrical body 41 have a vertical pipe shaft 16 and are coaxial and have a double pipe structure.
[0031]
An annular exhaust passage 42 is formed between the outer peripheral surface of the supply pipe main body 39 and the inner peripheral surface of the cylindrical body 41. The upper end of the exhaust passage 42 is closed by an annular end plate 43. An induction fan 45 is connected to the exhaust passage 42 via an exhaust pipe 44, whereby the exhaust passage 42 is set to a negative pressure. Therefore, the powder charged in the container 14 leaks to the outside through the gap between the seal member 19 and the mouth portion 26 and the like when the exhaust passage 42 is maintained at a negative pressure. The powder that can be reliably prevented and leaks to the outside is taken out from the exhaust passage 42 through the exhaust pipe 44. Therefore, there is no possibility that the powder leaks and scatters and floats in the work space of the worker. Other configurations and operations of the embodiment shown in FIG. 4 are the same as those of the above-described embodiment.
[0032]
FIG. 5 is a partial cross-sectional view of still another embodiment of the present invention. The embodiment shown in FIG. 5 is similar to the embodiment shown in FIG. 4 described above, and corresponding parts are denoted by the same reference numerals. Of note, a cover 48 is provided in this embodiment. The cover 48 is disposed inward (upward in FIG. 5) in the direction of the tube axis 16 of the supply pipe 38 with respect to the protective members 17 and 18, and has a shape that expands radially outward with respect to the protective members 17 and 18. Have. A space 49 closer to the protection members 17 and 18 than the cover 48 communicates with the exhaust passage 42 via the dust collection cylinder 51.
[0033]
The cover 48 includes an annular plate 53 that is fixed to the outer peripheral surface of the cylinder 41 of the supply cylinder 38, and a dust collection cylinder 54 that extends downward from the outer peripheral portion of the annular plate 53 toward the protection members 17 and 18 in FIG. Have The dust collection cylinder 54 has a tube shaft 16 common to the cylinder body 41, and thus the supply pipe 38, and is coaxial. The dust collection hole 51 is formed in the cylindrical body 41 near the protective members 17 and 18 (downward in FIG. 5) near the annular plate 53.
[0034]
In the embodiment shown in FIG. 5, even if the powder leaks to the outside when the compressed air to the sealing member 19 is discharged after the powder is supplied into the container 14, such powder is not covered by the cover 48. The air is sucked from the inside space 49 through the dust collection hole 51, the exhaust passage 42, the exhaust pipe 44, and the outside. Therefore, the worker's work space is not fouled by the powder. In FIG. 5, the inner diameter of the cylindrical body 54 is larger than the outer diameter of the protection members 17, 18 and the seal member 19 at the time of expansion with a further space outward in the radial direction. The end portion 56 of the cylindrical body 54 may be located at substantially the same position as the protection members 17 and 18 and the seal member 19 in the direction of the tube axis 16, but may be located above or below that.
[0035]
In another embodiment of the present invention, the supply pipes 12 and 38 may have a cylindrical shape other than a right cylindrical shape, for example, a rectangular tube shape. The tube axis 16 may be vertical, but may be oblique or horizontal. Instead of compressed air, other gases may be used, or liquids may be used. The protective members 17 and 18 may be annular plates as described above, but may have other configurations, for example, a net instead of a plate, and may not be a plate.
[0036]
【The invention's effect】
According to the first aspect of the present invention, an annular hollow seal member is disposed between a pair of protective members fixed in the vicinity of the supply end of the supply pipe, and when no fluid pressure is supplied into the seal member, the seal is sealed. The member does not contact the container or the like, and the wear of the seal member can be prevented from being damaged. By supplying fluid pressure to the sealing member and projecting outward from the protective member, the sealing member comes into contact with the inner peripheral surface of the container and airtightness in the container is achieved, so that the powder leaks to the outside. Is prevented. In this way, powder can be supplied and charged from the supply pipe to the container by a simple operation of supplying and discharging fluid pressure to and from the seal member with a relatively simple configuration. Further, as described above, the seal member is not worn or damaged, and the durability is improved. In addition, the seal member is disposed between the pair of protection members, which makes it possible to project the seal member greatly outward of the protection member, and to reduce the size of the seal member.
[0037]
Further , in a state where fluid pressure is supplied into the seal member and expanded, the outer peripheral surface of the seal member is connected to the inner peripheral surface of the container as described above, and the outer peripheral surface of the seal member is further protected by a pair of protections. contacts the opposite inner surface of the member, in contact with the outer peripheral face of the supply pipe, thus airtightness of the container is achieved. Therefore, leakage of the powder to the outside is prevented.
[0038]
According to the second aspect of the present invention, the outer peripheral surface of the protective member has an outwardly convex and rounded shape, and thus the outer peripheral surface of the protective member is in contact with the mouth of the container, There is no damage and the supply of powder is ensured.
[0039]
According to the third aspect of the present invention, the supply pipe has a double pipe structure of the supply pipe main body and the cylindrical body, and the exhaust passage in the cylindrical body is made negative by the induction fan, whereby the powder is introduced into the external space. It is sure to prevent scattering and floating.
[0040]
According to the fourth aspect of the present invention, the space covered by the cover is communicated with the attracting fan, so that even if the powder leaks to the outside, it is sucked in the cover and is put into the operator's working space. The leaked powder can be prevented from scattering and floating.
[0041]
According to the present invention of claim 5 , by using a cap-shaped cover having an annular plate and a dust collecting cylinder, the powder leaked to the outside can be reliably sucked and captured, and the dust collecting hole is Since it is formed in a cylindrical body, it is easy to make the space in the cover negative pressure, and since the dust collection hole is formed near the protective member near the annular plate, the leaked powder in the cover Is surely sucked and captured.
[Brief description of the drawings]
FIG. 1 is a simplified cross-sectional view showing the overall configuration of an embodiment of the present invention.
2 is an enlarged cross-sectional view showing a state where compressed air is supplied into the seal member 19 and powder is supplied into the container 14 from the supply end 13 of the supply pipe 12. FIG.
FIG. 3 is a partial cross-sectional view showing a natural state in which compressed air in the seal member 19 is discharged to atmospheric pressure.
FIG. 4 is a cross-sectional view showing a part of another embodiment of the present invention.
FIG. 5 is a partial cross-sectional view of still another embodiment of the present invention.
FIG. 6 is a cross-sectional view showing the prior art.
[Explanation of symbols]
11 Hopper 12, 38 Supply pipe 13 Supply end 14 Container 16 Pipe shaft 17, 18 Protective member 19 Seal member 21 Compressed air source 39 Supply pipe main body 41 Cylinder body 42 Exhaust passage 45 Induction fan 48 Cover 53 Annular plate 54 Dust collecting cylinder 51 Dust collection hole

Claims (5)

粉体を供給する供給端部を有し、この供給端部が、容器内に挿入される供給管と、
供給管の供給端部付近で、管軸に沿って間隔をあけて固定され、供給管の全周にわたって供給管の外方に突出する一対の保護部材と、
一対の保護部材間で、供給管を囲む可撓性を有する環状中空のシール部材であって、内部に流体圧が供給されないとき、シール部材が保護部材から外方に突出せず、内部に流体圧が供給されることによって、シール部材が保護部材よりも外方に突出して膨張し、容器の内周面に接触するシール部材と、
シール部材に流体を供給、排出する流体源とを含み、
供給管は、直円筒状であり、
各保護部材には、供給管が挿通して固定され、
保護部材の外周面が、供給管と同軸の円形に形成され、
シール部材の膨張時において、シール部材の外周面は、一対の保護部材の相互に対向する各内面、および、保護部材間における供給管の外周面に密着することを特徴とする粉体供給装置。
A supply end for supplying the powder, the supply end inserted into the container;
A pair of protective members that are fixed at intervals along the tube axis and project outward from the supply pipe over the entire circumference of the supply pipe, near the supply end of the supply pipe;
A flexible hollow seal member surrounding a supply pipe between a pair of protection members, and when no fluid pressure is supplied to the inside, the seal member does not protrude outward from the protection member, and the fluid is contained inside. By supplying pressure, the seal member protrudes outward from the protection member and expands, and the seal member contacts the inner peripheral surface of the container;
Supplying fluid to the seal member, seen including a fluid source for discharging,
The supply pipe has a right cylindrical shape,
A supply pipe is inserted and fixed to each protection member,
The outer peripheral surface of the protection member is formed in a circular shape coaxial with the supply pipe,
A powder supply apparatus , wherein an outer peripheral surface of a seal member is in close contact with each inner surface of the pair of protective members facing each other and an outer peripheral surface of a supply pipe between the protective members when the seal member is expanded .
保護部材の外周面は、外方に凸の弯曲した形状を有する請求項1に記載の粉体供給装置。The powder supply apparatus according to claim 1, wherein the outer peripheral surface of the protection member has an outwardly convex curved shape. 供給管は、
粉体を供給する供給管本体と、
供給管本体を、その供給端部付近で全周にわたって囲む筒体であって、供給管本体の外周面との間に環状の排気通路を形成し、この筒体に保護部材が固定されるとともに、この筒体をシール部材が囲む筒体とを有し、
排気通路に、誘引ファンが接続される請求項1または2に記載の粉体供給装置。
The supply pipe is
A supply pipe body for supplying powder;
A cylinder that surrounds the supply pipe main body over the entire circumference in the vicinity of the supply end, and an annular exhaust passage is formed between the supply pipe main body and the outer peripheral surface of the supply pipe main body, and a protective member is fixed to the cylinder The cylinder body is surrounded by a sealing member,
In the exhaust passage, a powder supply device according to claim 1 or 2 induction fan is connected.
筒体には、保護部材よりも外方に拡がった形状を有するカバーが、保護部材よりも供給管の管軸方向内方に固定され、
カバーよりも保護部材側の空間は、前記誘引ファンに連通される請求項3に記載の粉体供給装置。
A cover having a shape that extends outward from the protection member is fixed to the tube body in the axial direction of the supply pipe rather than the protection member,
The powder supply apparatus according to claim 3 , wherein a space closer to the protection member than the cover communicates with the attraction fan.
カバーは、
筒体の外周面に固定される環状板と、
この環状板の外周部から保護部材に向かって延び、筒体に同軸である集塵筒とを有し、
筒体には、環状板付近の保護部材寄りで、集塵筒内と排気通路とを連通する集塵孔が形成される請求項4に記載の粉体供給装置。
Cover
An annular plate fixed to the outer peripheral surface of the cylindrical body;
Extending from the outer periphery of the annular plate toward the protective member, and having a dust collection cylinder that is coaxial with the cylinder,
The powder supply apparatus according to claim 4, wherein the cylindrical body is formed with a dust collection hole that communicates the inside of the dust collection cylinder and the exhaust passage near the protective member near the annular plate.
JP2000280212A 2000-09-14 2000-09-14 Powder feeder Expired - Fee Related JP4472140B2 (en)

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Application Number Priority Date Filing Date Title
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JP4472140B2 true JP4472140B2 (en) 2010-06-02

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JP5128985B2 (en) * 2008-02-28 2013-01-23 丸大鐵工株式会社 Universal stopper
JP2012140165A (en) * 2011-01-04 2012-07-26 Mitsubishi Heavy Ind Ltd Hopper device and supply method
KR101193054B1 (en) 2011-06-14 2012-10-22 케이제이아이 공업주식회사 Powder supply device
KR101586583B1 (en) * 2014-09-11 2016-01-18 정명수 Preventing Apparatus for scattering dust of powder packing machine
JP7292585B2 (en) * 2019-09-27 2023-06-19 住友金属鉱山株式会社 filling equipment
GB2611785B (en) * 2021-10-13 2024-01-17 Keymed Medical & Industrial Equipment Ltd Tube set seal assembly
CN116280360A (en) * 2022-12-27 2023-06-23 青岛华腾石墨科技有限公司 Negative pressure dust-free feeding and conveying device

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