JP3650624B2 - Caulking gun and after-flow prevention cartridge - Google Patents

Caulking gun and after-flow prevention cartridge Download PDF

Info

Publication number
JP3650624B2
JP3650624B2 JP51043996A JP51043996A JP3650624B2 JP 3650624 B2 JP3650624 B2 JP 3650624B2 JP 51043996 A JP51043996 A JP 51043996A JP 51043996 A JP51043996 A JP 51043996A JP 3650624 B2 JP3650624 B2 JP 3650624B2
Authority
JP
Japan
Prior art keywords
tubular body
cartridge
caulking
rear wall
caulking gun
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP51043996A
Other languages
Japanese (ja)
Other versions
JPH10505784A (en
Inventor
アーサー ファンモール
Original Assignee
アーサー ファンモール
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アーサー ファンモール filed Critical アーサー ファンモール
Publication of JPH10505784A publication Critical patent/JPH10505784A/en
Application granted granted Critical
Publication of JP3650624B2 publication Critical patent/JP3650624B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/0005—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00576—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
    • B05C17/014—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like comprising means for preventing oozing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

A caulking gun and cartridge combination is provided with afterflow prevention. The cartridge has a tubular body (8), a forward dispensing opening (9) at a forward end of the tubular body, and a backwall (11, 12) movably disposed within the tubular body (8). The caulking gun has a trough (1) for receiving the cartridge, and a piston (4) movable parallel to the trough (1). A trigger handle (23) is used for pushing the backwall (11) forward within the tubular body and causing a reduction of volume within the chamber (13) in the cartridge. The backwall slides substantially in a contact-less manner within the tubular body, preferebly by way of a reduced diameter (OD) of the backwall (11) relative the inner diameter (ID) of the tubular body (8), so that it is pushed backwardly when the body retracts radially after actuation. Alternatively, the cartridge body may be prevented from expanding or may even be actively squeezed so that afterflow caused by the volume reduction of the relaxing tube body is safely prevented.

Description

技術分野
本発明は、コーキングガン及び分注カートリッジ、特に、ガン構体内に配置してピストンによりプランジャをカートリッジの後部から前記に押し出し、カートリッジ内の混合物のための利用できる容積を減少し、カートリッジの前方の開放先端から混合物を強制的に押し出すディスペンサを構成するタイプのカートリッジに関するものである。
このタイプのコーキングガンは好ましくないアフターフローを受ける、即ち、プランジャが能動的に前方に押し出されることがなくなった後にもカートリッジ内部には過剰圧力が残り、この結果、余分に混合物がカートリッジから強制的に押し出されることになる。
このアフターフロー現象の理由としては二つの主な理由が認識されている。先ず、プランジャの動作中に通常薄い壁のカートリッジが膨張し、系はあまねく弛緩状態に戻ろうとする傾向があるという物理法則に従って、プランジャの動作後にカートリッジの壁は弛緩する。従来技術のカートリッジの後壁は最前端位置を保持するように設計されており、コーキングガンのプランジャは復帰移動をしないようロックされるのが典型的であるという事実により、カートリッジ壁の弛緩はアフターフローを引き起こす、即ち、分注先端においてしみ出ることになる。第２に，たいていのコーキング混合物の粘性が高く、少なくとも周縁は圧縮可能であり、プランジャの動作に際して相当高い内部圧力を生じ、プランジャが強制的に前方に駆動されなくなった後に分注先端においてしみ出ることになる。
背景技術
上述のアフターフローの問題は、普通の従来技術の構造においては、十分な量の混合物を分注したらガンプランジャを即座に釈放して復帰させることにより解決していた。
米国特許第5,236,105号は、過剰放出を防止する新規な装置について記載している。この装置では、普通のコーキングガンに数個の部材即ち、雌形素子、雄形素子、復帰ばね、及び止め部を後付けする。ばねは後壁をカートリッジ内で能動的に引き戻す能動バイアス素子として使用し、従って、カートリッジの内部に相対的な真空状態を導入する。
米国特許第4,834,268号は、分注モードでプランジャを前方に押圧する力の半径方向成分によって弾性シールリングをカートリッジの内壁面に向けて押圧するプランジャ装置について記載している。このプランジャを動作させなくなったとき、シールリングは僅かに緩み、プランジャはカートリッジの内部圧力を弛緩させることができる。
上述のアフターフロー防止方法のうちの最初のものは満足のいかないものであることがはっきりしている。更に、上述の二つの特許に記載の装置は構造が複雑であり、従って、高価である。
発明の開示
従って、本発明の目的は、上述のタイプの従来技術の装置及び方法の欠点を解決するアフターフロー防止機能を有するコーキングガン及びカートリッジを得るにある。この主要な目的は構成簡単かつ安価であり、広範囲に使用されているカートリッジ及びコーキングガンに適用でき、オーバーフロー又はオーバーイジェクションを確実に防止できる装置として提供すべきである。
上述の目的を達成するため、本発明は、ほぼ管状の管状本体と、この管状本体の前方端部で前方に分注する開口と、前記管状本体内ポンプで移動自在に配置した後壁とを有し、前記管状本体の壁は、内径を限定する内壁面を有し、この内壁面と、前方端部と、後壁とによって区切られる室を限定する改良したコーキングカートリッジにおいて、前記後壁を管状本体の内径よりも小さい直径にし、前記内壁面と前記後壁の周囲との間にほぼ接触しない間隙を生ずるようにし、前記室内の内部圧力が室外の圧力より増加したとき、この内部圧力で前記後壁が前記管状本体の前方端部から離れる後方に押し戻すようにしたことを特徴とする。
本発明の付加的な特徴によれば、前記間隙を少なくとも0.2mmとし、更に、前記間隙を1.0mm以上にもすることができる。
本発明の他の特徴においては、後壁の周囲に形成したスペーサ隆起部を設け、このスペーサ隆起部を管状本体の内壁面に接触させ間隙を生ずるようにする。
更に、本発明によれば、コーキングガンとカートリッジとの組立体において、前記カートリッジを、ほぼ管状の管状本体と、この管状本体の前方端部における前方に分注するノズルと、前記管状本体内に移動可能に配置した後壁とにより構成し、前記管状本体が前記前方端部と前記後壁との間で室を限定するようにし、前記コーキングガンを、前記カートリッジを収容するトラフを形成する本体と、前記トラフに平行に移動自在であり前記後壁を前記管状本体内で前方に押し出し、カートリッジ内の室内の容積を減少するピストンとにより構成し、前記管状本体の壁は、内径を限定する内壁面を有し、この内壁面と、前方端部と、後壁とによって区切られる室を限定し、また、前記後壁を管状本体の内径よりも小さい直径にし、前記内壁面と前記後壁の周囲との間にほぼ接触しない間隙を生ずるようにしたことを特徴とする。
更に、本発明の他の特徴によれば、前記カートリッジの管状本体に作用的に関連して設け、ピストンにより後壁を前方に押し出すとき、前記管状本体の半径方向膨張を防止する半径方向膨張防止手段を設ける。この半径方向膨張防止手段は前記半径方向膨張防止手段は前記管状本体上に緊密に嵌合する堅固な管状スリーブにより構成するとよい。
更に、本発明の他の特徴によれば、前記堅固な管状スリーブはPVC、繊維強化プラスチック、及び金属のグループから選択した硬質材料により構成する。
更に、本発明の他の特徴によれば、前記半径方向膨張防止手段を、コーキングガンのトラフに配置してカートリッジの管状本体を選択的に絞り出すクランプ装置とする。
本発明の他の特徴によれば、前記コーキングガンに、ピストンを前方に押し出してコーキング混合物を分注するトリガハンドルを設け、前記クランプ装置を前記コーキングガンのトリガハンドルに連結し、前記ピストンにより後壁を前方に押し出すと同時に前記管状本体を引き絞るようにする。
本発明の特徴とされる他の特徴は請求の範囲において述べる。
本発明はアフターフロー防止機能付きコーキングガン及びカートリッジの実施例について図示及び説明するが、図示の詳細に限定されることなく、種々の変更及び構造的変化を請求の範囲から逸脱することなく行うことができ、これも本発明の範囲内であることを意図するものである。
しかし、本発明の構造を本発明の他の目的及び利点は、添付図面の特別な実施例につき説明することによって理解されるであろう。
【図面の簡単な説明】
図１は、従来技術のコーキングガンの斜視図、
図２は、従来技術のコーキングカートリッジの縦断面図、
図３は、本発明によるコーキングカートリッジの第１の実施例の同様の縦断面図、
図４は、本発明によるコーキングカートリッジの第２実施例の後壁の後から見た端面図、
図５は、図４のＶ−Ｖ線上の断面図、
図６は、図４及び図５の実施例に対応するピストンの正面図、
図７は、本発明による第３実施例の堅固なスリーブの縦断面、
図８は、コーキングガンのトラフの線図的正面図、
図９は、絞り出し機構を有するコーキングガンの側面図である。
好適な実施例の説明
次に、先ず特に、図１につき詳細に説明すると、図１は従来のコーキングガンを示す。前方本体１にはトラフ（溝）２を形成し、このトラフ２にはコーキングカートリッジを収容する。ピストンステム３によりプランジャヘッド４をトラフ２の前方端壁５に向かって前方に押し出す。ロッキングドッグ６によりステム３が後方に移動するのを阻止し、ばね７はドッグ６をロック位置に向けて偏倚する。ドッグ６をほぼ垂直状態の釈放位置に回動することによってステム３を後方に移動することができる。
図２につき説明すると、この図面に示すように、典型的な従来技術のコーキングチューブは管状本体８を有する。普通、この管状本体は円筒形のチューブ８として形成し、このチューブ８は紙ラミネート、繊維質プラスチック、丸めた金属シート等によって形成する。円筒形のチューブ８は比較的柔らかく、内部室の圧力が増加することに応答して半径方向に膨張する。ノズル先端９を前方閉止壁10に形成する。チューブ８はバックプレート11により後方を閉鎖する。バックプレート11の円筒形のフランジ12は、チューブ８の内側半径に対応する外側半径を有する。フランジ12はチューブ８の内壁面と後壁11との間に摺動自在のシールを形成する。円筒形のシールフランジ15を有する補強リング14をチューブ８の後方端縁でクランプする。保管に際しては後壁11をリング14に直接隣接させて配置し、フランジ12をシールフランジ15でクランプする。全壁10に刺し込みを入れてノズル先端19をカットし分注開口を形成した後にのみ後壁11を前方に押し出し、コーキング用混合物を分注する。
後壁11を前方に押し出し、フランジ12をチューブ８の内壁面に沿って摺動させるとき、コーキング混合物13はチューブ室の内側の圧力増加によって分注先端から強制的に押し出される。分注先端からコーキング混合物13を押し出すことの他に、増加した圧力はチューブ本体を半径方向に膨張させる。実際、円筒形のチューブ壁に加わる半径方向の圧力は分注開口に向かう軸線方向に作用する圧力の丁度２倍になることが分かっている。チューブ８のこの半径方向「ブレシング（呼吸）」により、ピストン４をもはや動作させることがなくなって、チューブが増加した直径状態に弾性的に弛緩するときにアフターフローを生じることになる。
図３は本発明の第１の実施例を示し、本発明によれば、円筒形フランジ12の外径ODはチューブ８の内径IDよりも間隙ΔＤだけ小さい。この間隙ΔＤはコーキング混合物13に基づいて即ち、粘性及び空気との反応速度に基づいて選択する。換言すれば、混合物の粘性が高いほど間隙ΔＤを大きくする。更に、混合物の大気に対する不活性が強いほど間隙を大きくする。一般的に、代表的なシリコン、グリセロールエーテル、樹脂、及びロジン酸等を収容するチューブの間隙はΔＤ＝1mmとする。
粘性が高い混合物用のチューブはΔＤ≦0.2mmとする。適正な間隙は当業者によって選択することができる。
チューブ８のフランジ12及び内壁面は、両者間にしみ出る僅かな量のコーキング混合物によって無接触シールを形成する。分注開口の面積が間隙ΔＤと周長との積で規定される面積よりも相当大きいという事実によって、無視できる程度のコーキング混合物がそのルートから漏洩するだけである。ピストンの圧力が緩んでピストンが逆行すると即座に、後壁11はチューブ壁が弛緩状態をとるのに追従する。フランジ12とチューブとの間の間隙内のコーキング混合物が依然として新鮮である（粘性が最大である）ため、後壁は容易に摺動する。後壁が弛緩位置に達した（即ち、チューブ本体が弛緩した）直後、空気に晒されている残りのコーキング混合物は硬化し、従って、適正なシールを形成する。カートリッジ室内に残存する混合物は大気からシールされる。
製造後に、即ち、初めて使用する前の棚保管中、後壁11は普通の従来技術の装置と同様にしてシールする。
ΔＤ＞0.0mmの間隙のコーキングチューブ装置は一見、非論理的のように見えるである。即ち、このようなチューブに収容される混合物は空気に触れると硬化するからであり、このような開口は常識に反している。しかし、本発明者は実施した後、乾燥した混合物のシールリングがフランジ12とチューブ８の内壁面との間に形成されることを確認した。次の分注操作中に、ピストン４を押し出すとき後壁11は前方に移動し、一時的なシールは破壊され、フランジ12とチューブ８の内壁面との間の摺動シールは柔らかい混合物によって機能する。ピストンステム３によってピストン４に加わる圧力が分注直後に緩んだとき、好ましくないアフターフローを引き起こす代わりに、後退するチューブ８は後壁11を押し戻すことができる。
図４は、第１実施例に組み合わせることができる第２実施例を示し、この第２実施例は、アクティブプルバックの特徴がある。フランジ12には互いに対向する２個のラッチ16を設ける。ピストン４をフランジ12で規定される開口内に押し込むとき、ピストン４はラッチ16の背後に掛合する。このように後壁11に掛合するとき、ステム３を引き戻すことによって後壁11を能動的に後退させる。好適な実施例（図６参照）では、ピストンプランジャ４に切欠き17を設け、この切欠き17によりピストン４をラッチ16に選択的に掛合することができるようにする。
図４につき再び説明すると、チューブの内壁面とフランジ12との間の間隙を後壁11即ち、フランジ12の周囲に一体に形成した隆起部19によって規定する。
第３の実施例において、チューブ８上に非弾性スリーブ18を摺動嵌合させる点で、チューブ８の半径方向の膨張は完全に防止される。スリーブ18は硬質のPVC、繊維強化プラスチック、金属、又は同様の材料により形成する。スリーブ18の内径はチューブ８の外径に対応するよう選択する。更に、スリーブ18はできるだけ薄くしてコーキングガンのトラフ２内に嵌合できるようにする。
図８につき説明すると、堅固なスリーブの代わりに、コーキングガン本体のトラフ１の端縁に関節連結した頂部蓋20を設けた実施例を示す。蓋20を閉鎖してラッチフック21にラッチすると、コーキングチューブのための堅固なスリーブが形成される。
最後に、第４実施例では、チューブ８は後壁11を前方に送ることにより分注することの他に絞り出す。分注がもはや必要でなくなるとき、チューブ８の絞り出しは緩む。従って、本発明の好適な実施例の構造体では、コーキングガンにクランプ装置を設け、このクランプ装置によって後壁の前進移動と同時にチューブの絞り出しを行う。図８及び図９に示すように、蓋20に２個のストリップ22を設け、これらのストリップをラッチ21とこのラッチ21の反対側でトラフ本体１との間に連結する。トリガハンドル23引き絞ってピストン４を前進させるとき、楔24はストリップ22の下側に引っ張られる。このことにより、ストリップ22が蓋20をクランプし、従って、コーキングチューブ８を能動的に圧縮する。蓋20は、トラフの直径よりも僅かに大きい直径にすると好適である。このことにより、コーキングカートリッジが占める空間の断面は僅かに楕円形状となる。
本明細書中で「コーキングガン」及び「コーキング混合物」という用語で説明したが、これらの用語は当業界で一般的に使用され、管状容器内でピストン動作により容積が減少するディスペンサ及び上述のアフターフローの問題のあるタイプの混合物のことを意味する。 TECHNICAL FIELD The present invention relates to caulking guns and dispensing cartridges, in particular in a gun assembly, and a piston pushes the plunger out of the rear of the cartridge, reducing the available volume for the mixture in the cartridge. In addition, the present invention relates to a cartridge of a type constituting a dispenser that forcibly pushes the mixture from the open front end of the cartridge.
This type of caulking gun is subject to undesired afterflow, i.e., excessive pressure remains inside the cartridge even after the plunger is no longer actively pushed forward, resulting in extra mixture forced from the cartridge. Will be pushed out.
Two main reasons for this afterflow phenomenon have been recognized. First, the wall of the cartridge relaxes after operation of the plunger in accordance with the physical laws that normally the thin wall cartridge expands during operation of the plunger and the system generally tends to return to a relaxed state. Due to the fact that the rear wall of prior art cartridges is designed to hold the frontmost position and the plunger of the caulking gun is typically locked against return movement, cartridge wall relaxation is not Causes flow, ie oozes out at the dispensing tip. Second, most coking mixtures are highly viscous and at least the periphery is compressible, creating a fairly high internal pressure during plunger operation and oozing out at the dispensing tip after the plunger is not forced forward. It will be.
Background art The after-flow problem described above has been solved in a conventional prior art construction by releasing the gun plunger immediately and returning it after a sufficient amount of mixture has been dispensed.
U.S. Pat. No. 5,236,105 describes a novel device that prevents over-release. In this device, an ordinary caulking gun is retrofitted with several members: a female element, a male element, a return spring, and a stop. The spring is used as an active biasing element that actively pulls the back wall back into the cartridge, thus introducing a relative vacuum within the cartridge.
U.S. Pat. No. 4,834,268 describes a plunger device that presses an elastic seal ring toward the inner wall of a cartridge by a radial component of the force that pushes the plunger forward in dispense mode. When the plunger is deactivated, the seal ring is slightly loosened and the plunger can relax the internal pressure of the cartridge.
It is clear that the first of the above afterflow prevention methods is unsatisfactory. Furthermore, the devices described in the above two patents are complex in structure and are therefore expensive.
DISCLOSURE OF THE INVENTION Accordingly, it is an object of the present invention to provide a caulking gun and cartridge having an afterflow prevention feature that overcomes the shortcomings of prior art devices and methods of the type described above. This main purpose is simple and inexpensive to construct, can be applied to a wide range of cartridges and caulking guns, and should be provided as a device that can reliably prevent overflow or over-ejection.
In order to achieve the above-mentioned object, the present invention comprises a substantially tubular tubular body, an opening that dispenses forward at the front end of the tubular body, and a rear wall that is movably disposed by the pump in the tubular body. And the wall of the tubular body has an inner wall surface that limits an inner diameter, and an improved caulking cartridge that limits a chamber partitioned by the inner wall surface, a front end portion, and a rear wall. The inner diameter of the tubular body is smaller than the inner diameter of the tubular body, and a gap that does not substantially contact is formed between the inner wall surface and the periphery of the rear wall. The rear wall is pushed back backward away from the front end of the tubular body.
According to an additional feature of the invention, the gap can be at least 0.2 mm and the gap can be 1.0 mm or more.
In another aspect of the present invention, a spacer ridge formed around the rear wall is provided, and the spacer ridge is brought into contact with the inner wall surface of the tubular body so as to generate a gap.
Furthermore, according to the present invention, in the assembly of the caulking gun and the cartridge, the cartridge is substantially tubular, the nozzle for dispensing forward at the front end of the tubular body, and the tubular body. A main body forming a trough for accommodating the cartridge, wherein the tubular main body defines a chamber between the front end portion and the rear wall, and the caulking gun is configured to include a cartridge. And a piston that is movable in parallel to the trough and pushes the rear wall forward in the tubular body to reduce the volume of the chamber in the cartridge, and the wall of the tubular body defines an inner diameter. A chamber having an inner wall surface, defined by the inner wall surface, the front end, and the rear wall; the rear wall having a diameter smaller than the inner diameter of the tubular body; Characterized in that so as to produce a gap which does not substantially contact between the periphery of the rear wall serial.
Further in accordance with another aspect of the present invention, a radial expansion prevention is provided that is operatively associated with the tubular body of the cartridge to prevent radial expansion of the tubular body when the rear wall is pushed forward by a piston. Means are provided. The radial expansion preventing means may comprise a rigid tubular sleeve that fits tightly onto the tubular body.
Further in accordance with another aspect of the present invention, the rigid tubular sleeve is comprised of a rigid material selected from the group of PVC, fiber reinforced plastic, and metal.
Further, according to another aspect of the present invention, the radial expansion preventing means is disposed in a trough of a caulking gun to provide a clamping device that selectively squeezes the tubular body of the cartridge.
According to another feature of the invention, the caulking gun is provided with a trigger handle for pushing the piston forward to dispense the caulking mixture, the clamping device is connected to the trigger handle of the caulking gun and is moved back by the piston. The tubular body is drawn out at the same time as the wall is pushed forward.
Other features which are characteristic of the invention are set forth in the appended claims.
The present invention illustrates and describes an embodiment of a caulking gun and cartridge with afterflow prevention function, but is not limited to the details shown, and various modifications and structural changes can be made without departing from the scope of the claims. Which are intended to be within the scope of the present invention.
However, other objects and advantages of the structure of the present invention will be understood by referring to the specific embodiments of the accompanying drawings.
[Brief description of the drawings]
FIG. 1 is a perspective view of a prior art caulking gun,
FIG. 2 is a longitudinal sectional view of a conventional caulking cartridge,
FIG. 3 is a similar longitudinal section view of a first embodiment of a caulking cartridge according to the invention,
FIG. 4 is an end view of the second embodiment of the caulking cartridge according to the present invention as seen from the rear wall;
5 is a cross-sectional view taken along the line VV in FIG.
FIG. 6 is a front view of a piston corresponding to the embodiment of FIGS.
FIG. 7 shows a longitudinal section through a rigid sleeve of a third embodiment according to the invention,
FIG. 8 is a diagrammatic front view of a caulking gun trough,
FIG. 9 is a side view of a caulking gun having a squeezing mechanism.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, with particular reference to FIG. 1 in detail, FIG. 1 shows a conventional caulking gun. A trough (groove) 2 is formed in the front body 1, and a caulking cartridge is accommodated in the trough 2. The plunger head 4 is pushed forward by the piston stem 3 toward the front end wall 5 of the trough 2. The locking dog 6 prevents the stem 3 from moving backwards, and the spring 7 biases the dog 6 toward the locked position. The stem 3 can be moved rearward by rotating the dog 6 to the release position in a substantially vertical state.
Referring to FIG. 2, a typical prior art caulking tube has a tubular body 8 as shown in this figure. Usually, the tubular body is formed as a cylindrical tube 8, which is formed by paper laminate, fibrous plastic, rolled metal sheet or the like. Cylindrical tube 8 is relatively soft and expands radially in response to increasing pressure in the interior chamber. A nozzle tip 9 is formed in the front closing wall 10. The tube 8 is closed rearward by the back plate 11. The cylindrical flange 12 of the back plate 11 has an outer radius corresponding to the inner radius of the tube 8. The flange 12 forms a slidable seal between the inner wall surface of the tube 8 and the rear wall 11. A reinforcing ring 14 having a cylindrical sealing flange 15 is clamped at the rear edge of the tube 8. For storage, the rear wall 11 is placed directly adjacent to the ring 14 and the flange 12 is clamped by the seal flange 15. Only after the piercing is put into the whole wall 10 and the nozzle tip 19 is cut to form a dispensing opening, the rear wall 11 is pushed forward to dispense the caulking mixture.
When the rear wall 11 is pushed forward and the flange 12 is slid along the inner wall surface of the tube 8, the coking mixture 13 is forced out of the dispensing tip due to the pressure increase inside the tube chamber. In addition to pushing the caulking mixture 13 out of the dispensing tip, the increased pressure causes the tube body to expand radially. In fact, it has been found that the radial pressure applied to the cylindrical tube wall is exactly twice the pressure acting in the axial direction towards the dispensing opening. This radial “breathing” of the tube 8 will no longer operate the piston 4 and will cause afterflow when the tube elastically relaxes to an increased diameter state.
FIG. 3 shows a first embodiment of the present invention. According to the present invention, the outer diameter OD of the cylindrical flange 12 is smaller than the inner diameter ID of the tube 8 by a gap ΔD. This gap ΔD is selected on the basis of the coking mixture 13, ie on the basis of the viscosity and the reaction rate with air. In other words, the gap ΔD is increased as the viscosity of the mixture is higher. Furthermore, the gap becomes larger as the inertness of the mixture to the atmosphere is stronger. In general, the gap between tubes containing typical silicon, glycerol ether, resin, rosin acid and the like is set to ΔD = 1 mm.
The tube for the mixture having a high viscosity is set to ΔD ≦ 0.2 mm. The appropriate gap can be selected by one skilled in the art.
The flange 12 and the inner wall of the tube 8 form a contactless seal with a small amount of caulking mixture that oozes between them. Due to the fact that the area of the dispensing opening is considerably larger than the area defined by the product of the gap ΔD and the perimeter, only a negligible amount of coking mixture will leak from the route. As soon as the piston pressure is relaxed and the piston moves backward, the rear wall 11 follows the tube wall in a relaxed state. Because the caulking mixture in the gap between the flange 12 and the tube is still fresh (the viscosity is maximum), the rear wall slides easily. Immediately after the rear wall has reached the relaxed position (ie, the tube body has relaxed), the remaining caulking mixture exposed to air hardens and thus forms a proper seal. The mixture remaining in the cartridge chamber is sealed from the atmosphere.
After manufacture, i.e. during shelf storage prior to first use, the rear wall 11 is sealed in the same manner as ordinary prior art devices.
A caulking tube device with a gap of ΔD> 0.0 mm at first glance appears to be illogical. That is, the mixture contained in such a tube is cured when exposed to air, and such an opening is contrary to common sense. However, after doing so, the inventor has confirmed that a seal ring of the dried mixture is formed between the flange 12 and the inner wall surface of the tube 8. During the next dispensing operation, when pushing out the piston 4, the rear wall 11 moves forward, the temporary seal is broken, and the sliding seal between the flange 12 and the inner wall of the tube 8 functions with a soft mixture. To do. When the pressure applied to the piston 4 by the piston stem 3 relaxes immediately after dispensing, the retracting tube 8 can push back the rear wall 11 instead of causing undesired afterflow.
FIG. 4 shows a second embodiment that can be combined with the first embodiment, which is characterized by active pull back. The flange 12 is provided with two latches 16 facing each other. When the piston 4 is pushed into the opening defined by the flange 12, the piston 4 engages behind the latch 16. Thus, when engaging with the rear wall 11, the rear wall 11 is actively retracted by pulling back the stem 3. In the preferred embodiment (see FIG. 6), the piston plunger 4 is provided with a notch 17 that allows the piston 4 to be selectively engaged with the latch 16.
Referring again to FIG. 4, the gap between the inner wall surface of the tube and the flange 12 is defined by a ridge 19 integrally formed around the rear wall 11, that is, the flange 12.
In the third embodiment, the radial expansion of the tube 8 is completely prevented in that the inelastic sleeve 18 is slidably fitted onto the tube 8. The sleeve 18 is formed of rigid PVC, fiber reinforced plastic, metal, or similar material. The inner diameter of the sleeve 18 is selected to correspond to the outer diameter of the tube 8. Furthermore, the sleeve 18 is made as thin as possible so that it can be fitted into the trough 2 of the caulking gun.
Referring to FIG. 8, an embodiment is shown in which, instead of a rigid sleeve, a top lid 20 is provided that is articulated at the end of the trough 1 of the caulking gun body. When the lid 20 is closed and latched to the latch hook 21, a rigid sleeve for the caulking tube is formed.
Finally, in the fourth embodiment, the tube 8 is squeezed in addition to dispensing by feeding the rear wall 11 forward. When dispensing is no longer necessary, the squeezing of the tube 8 is loosened. Therefore, in the structure of the preferred embodiment of the present invention, the caulking gun is provided with a clamp device, and the tube is squeezed out simultaneously with the forward movement of the rear wall. As shown in FIGS. 8 and 9, the lid 20 is provided with two strips 22, which are connected between the latch 21 and the trough body 1 on the opposite side of the latch 21. When the trigger handle 23 is pulled and the piston 4 is advanced, the wedge 24 is pulled to the lower side of the strip 22. This causes the strip 22 to clamp the lid 20 and thus actively compress the caulking tube 8. The lid 20 is preferably a diameter slightly larger than the diameter of the trough. As a result, the cross section of the space occupied by the caulking cartridge is slightly elliptical.
Although described herein with the terms “caulking gun” and “coking mixture”, these terms are commonly used in the art, and dispensers that are reduced in volume by piston action within a tubular container and the above-described afters Means a problematic type of mixture of flow.

Claims (11)

ほぼ管状の管状本体と、この管状本体の前方端部で前方に分注する開口と、前記管状本体内で移動自在に配置した後壁とを有し、前記管状本体の壁は、内径を限定する内壁面を有し、この内壁面と、前方端部と、後壁とによって区切られる室を限定する改良したコーキングカートリッジにおいて、前記後壁を管状本体の内径よりも小さい直径にし、前記内壁面と前記後壁の周囲との間でほぼ全周にわたり接触しない間隙を生ずるようにし、前記室内の内部圧力が室外の圧力より増加した とき、この内部圧力で前記後壁が前記管状本体の前方端 部から離れる後方に押し戻すようにしたことを特徴とするコーキングカートリッジ。A substantially tubular tubular body, an opening for dispensing forward at the front end of the tubular body , and a rear wall movably disposed within the tubular body, the wall of the tubular body defining an inner diameter In the improved caulking cartridge that limits the chamber partitioned by the inner wall surface, the front end, and the rear wall, the rear wall has a diameter smaller than the inner diameter of the tubular body, and the inner wall surface and so produce a gap which does not contact the entire periphery substantially between the periphery of the rear wall, when the internal pressure of the chamber increases the pressure of the outdoor, the forward end of the rear wall in the internal pressure said tubular body The caulking cartridge is characterized in that it is pushed back backward from the part . 前記間隙を少なくとも0.2mmとした請求項１記載のコーキングカートリッジ。The caulking cartridge according to claim 1, wherein the gap is at least 0.2 mm. 前記間隙を少なくとも1.0mmとした請求項１記載のコーキングカートリッジ。The caulking cartridge according to claim 1, wherein the gap is at least 1.0 mm. 前記後壁の周囲に形成したスペーサ隆起部を設け、このスペーサ隆起部を管状本体の内壁面に接触させ間隙を生ずるようにした請求項１記載のコーキングカートリッジ。2. The caulking cartridge according to claim 1, wherein a spacer raised portion formed around the rear wall is provided, and the spacer raised portion is brought into contact with the inner wall surface of the tubular main body so as to generate a gap. コーキングガンとカートリッジとの組立体において、
前記カートリッジを、ほぼ管状の管状本体と、この管状本体の前方端部における前方に分注するノズルと、前記管状本体内に移動可能に配置した後壁とにより構成し、前記管状本体が前記前方端部と前記後壁との間で室を限定するようにし、
前記コーキングガンを、前記カートリッジを収容するトラフを形成する本体と、前記トラフに平行に移動自在であり前記後壁を前記管状本体内で前方に押し出し、カートリッジ内の室内の容積を減少するピストンとにより構成し、
前記管状本体の壁は、内径を限定する内壁面を有し、この内壁面と、前方端部と、後壁とによって区切られる室を限定し、また、前記後壁を管状本体の内径よりも小さい直径にし、前記内壁面と前記後壁の周囲との間にほぼ全周にわたり接触しない間隙を生ずるようにし、室内の圧力が室外の圧力よりも大きくなるとき後壁が管状本体の前方端部から後方に移動するようにし、前記室内の内 部圧力が室外の圧力より増加したとき、この内部圧力で 前記後壁が前記管状本体の前方端部から離れた後方に移 動するようにしたことを特徴とするコーキングガンとコーキングカートリッジの組立体。In the assembly of the caulking gun and cartridge,
The cartridge comprises a substantially tubular tubular body, a nozzle for dispensing forward at the front end of the tubular body, and a rear wall movably disposed within the tubular body, the tubular body being the front Limiting the chamber between the end and the rear wall,
A main body that forms a trough for housing the cartridge, and a piston that is movable in parallel with the trough and pushes the rear wall forward in the tubular main body to reduce the volume in the interior of the cartridge. Consisting of
The wall of the tubular body has an inner wall surface that limits an inner diameter, limits a chamber defined by the inner wall surface, a front end portion, and a rear wall, and the rear wall is larger than the inner diameter of the tubular body. A small diameter is formed so that a gap that does not contact the entire circumference between the inner wall surface and the periphery of the rear wall is formed, and the rear wall is a front end portion of the tubular body when the pressure in the chamber becomes larger than the pressure outside the chamber. so as to move backward from the internal pressure of the chamber when the increased than the pressure in the outdoor, is the rear wall in the internal pressure so as to move rearwardly away from the forward end of the tubular body An assembly of a caulking gun and a caulking cartridge characterized by 前記カートリッジの管状本体に作用的に関連して設け、ピストンにより後壁を前方に押し出すとき、前記管状本体の半径方向膨張を防止する半径方向膨張防止手段を設けた請求項５記載のコーキングガンとコーキングカートリッジの組立体。6. The caulking gun according to claim 5 , further comprising a radial expansion preventing means provided in operative relation with the tubular body of the cartridge and preventing radial expansion of the tubular body when the rear wall is pushed forward by a piston. Caulking cartridge assembly. 前記半径方向膨張防止手段は前記管状本体上に緊密に嵌合する堅固な管状スリーブにより構成した請求項６記載のコーキングガンとコーキングカートリッジの組立体。7. A caulking gun and caulking cartridge assembly according to claim 6, wherein said radial expansion preventing means comprises a rigid tubular sleeve that fits tightly onto said tubular body. 前記堅固な管状スリーブはPVC、繊維強化プラスチック、及び金属のグループから選択した硬質材料により構成した請求項７記載のコーキングガンとコーキングカートリッジの組立体。8. The caulking gun and caulking cartridge assembly of claim 7, wherein the rigid tubular sleeve is constructed of a rigid material selected from the group of PVC, fiber reinforced plastic, and metal. 前記管状本体の壁は、内径を限定する内壁面を有し、前記後壁を管状本体の内径よりも小さい直径にし、前記内壁面と前記後壁の周囲との間にほぼ接触しない間隙を生ずるようにした請求項６記載のコーキングガンとコーキングカートリッジの組立体。The wall of the tubular body has an inner wall surface that defines an inner diameter, the rear wall is made smaller in diameter than the inner diameter of the tubular body, and a gap that does not substantially contact is formed between the inner wall surface and the periphery of the rear wall. 7. The assembly of a caulking gun and a caulking cartridge according to claim 6, wherein 前記半径方向膨張防止手段を、コーキングガンのトラフに配置してカートリッジの管状本体を選択的に絞り出すクランプ装置とした請求項６記載のコーキングガンとコーキングカートリッジの組立体。7. The assembly of a caulking gun and a caulking cartridge according to claim 6, wherein the radial expansion preventing means is a clamping device that is arranged in a trough of the caulking gun to selectively squeeze the tubular body of the cartridge. 前記コーキングガンに、ピストンを前方に押し出してコーキング混合物を分注するトリガハンドルを設け、前記クランプ装置を前記コーキングガンのトリガハンドルに連結し、前記ピストンにより後壁を前方に押し出すと同時に前記管状本体を引き絞るようにした請求項10記載のコーキングガンとコーキングカートリッジの組立体。The caulking gun is provided with a trigger handle for extruding a piston forward to dispense a coking mixture, the clamp device is connected to the trigger handle of the caulking gun, and the rear wall is pushed forward by the piston simultaneously with the tubular body. 11. The assembly of a caulking gun and a caulking cartridge according to claim 10, wherein the caulking gun is drawn.
JP51043996A 1994-09-13 1995-09-13 Caulking gun and after-flow prevention cartridge Expired - Fee Related JP3650624B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL9401492A NL9401492A (en) 1994-09-13 1994-09-13 Method and part to prevent after-flow of tubes.
NL9401492 1994-09-13
PCT/US1995/012371 WO1996008428A1 (en) 1994-09-13 1995-09-13 Caulking gun and cartridge with afterflow prevention

Publications (2)

Publication Number Publication Date
JPH10505784A JPH10505784A (en) 1998-06-09
JP3650624B2 true JP3650624B2 (en) 2005-05-25

Family

ID=19864650

Family Applications (1)

Application Number Title Priority Date Filing Date
JP51043996A Expired - Fee Related JP3650624B2 (en) 1994-09-13 1995-09-13 Caulking gun and after-flow prevention cartridge

Country Status (17)

Country Link
EP (1) EP0776301B1 (en)
JP (1) JP3650624B2 (en)
KR (1) KR100261341B1 (en)
CN (1) CN1068290C (en)
AT (1) ATE214026T1 (en)
AU (1) AU696083B2 (en)
CA (1) CA2199852C (en)
DE (1) DE69525752T2 (en)
DK (1) DK0776301T3 (en)
ES (1) ES2172598T3 (en)
HK (1) HK1003176A1 (en)
MX (1) MX9701895A (en)
NL (1) NL9401492A (en)
NZ (1) NZ295506A (en)
PT (1) PT776301E (en)
RU (1) RU2141922C1 (en)
WO (1) WO1996008428A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014180665A (en) * 2013-03-15 2014-09-29 Nordson Corp Liquid dispensing syringe

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100560339C (en) * 2007-01-22 2009-11-18 东营华创科技有限责任公司 The preparation method of polythene glass fibre resin-immersing composite pipe
DK3038674T3 (en) * 2013-08-29 2020-02-24 Shl Medical Ag DRUG DELIVERY DEVICES
CN104923451B (en) * 2014-03-17 2019-09-03 澳大利亚刷子制品有限公司 Caulking gun and sealant cylinder
TWI576167B (en) * 2015-04-02 2017-04-01 翔宣富企業有限公司 Push member and caulking gun having the same
DE202017107724U1 (en) 2017-12-19 2019-03-21 Wolfcraft Gmbh Piston for a cartridge ejection device
KR102669285B1 (en) * 2023-10-11 2024-05-24 최진기 A cartridge of minimizing discharge of residual contents and a caulking gun using the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731176A (en) * 1952-01-04 1956-01-17 Crewe Samuel Extruding applicator for calking compound and the like
US2889085A (en) * 1955-07-19 1959-06-02 Harold B Collins Drive means for calking gun plungers
US4022355A (en) * 1976-03-26 1977-05-10 George Sabaka Cartridge for containing and dispensing viscous material
DE3708704A1 (en) * 1987-03-18 1988-09-29 Fischbach A Kunststoff Kg MEASURING CARTRIDGE FOR PASTOESE
DE3723088A1 (en) * 1987-07-13 1989-01-26 Hilti Ag SEALING PROCEDURE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014180665A (en) * 2013-03-15 2014-09-29 Nordson Corp Liquid dispensing syringe

Also Published As

Publication number Publication date
ATE214026T1 (en) 2002-03-15
WO1996008428A1 (en) 1996-03-21
HK1003176A1 (en) 1998-10-16
EP0776301A1 (en) 1997-06-04
JPH10505784A (en) 1998-06-09
ES2172598T3 (en) 2002-10-01
KR100261341B1 (en) 2000-07-01
CN1160387A (en) 1997-09-24
EP0776301A4 (en) 1998-07-29
NL9401492A (en) 1996-04-01
MX9701895A (en) 1997-06-28
PT776301E (en) 2002-08-30
DK0776301T3 (en) 2002-06-24
RU2141922C1 (en) 1999-11-27
AU696083B2 (en) 1998-09-03
CN1068290C (en) 2001-07-11
DE69525752D1 (en) 2002-04-11
CA2199852C (en) 2002-08-13
EP0776301B1 (en) 2002-03-06
NZ295506A (en) 1999-04-29
AU3886295A (en) 1996-03-29
DE69525752T2 (en) 2002-10-17
CA2199852A1 (en) 1996-03-21
KR970706187A (en) 1997-11-03

Similar Documents

Publication Publication Date Title
US5704518A (en) Caulking gun and cartridge with afterflow prevention
US5595327A (en) Caulk gun with tube engaging receptacle
US20100167231A1 (en) Piston and handheld dispenser including a piston
US2582156A (en) Dispensing apparatus and cartridge therefor
US3029985A (en) Flow control plunger
JP3650624B2 (en) Caulking gun and after-flow prevention cartridge
US20150144659A1 (en) Shut-off system for a dispenser
US2778541A (en) Caulking gun
JPH0858856A (en) Cartridge equipped with replaceable content package
US8777506B2 (en) Liquid applicator
US2833451A (en) Caulking gun and cartridge therefor
US5044523A (en) Method and apparatus for dispensing of volatile fluids
KR200406080Y1 (en) silicon gun
US3369714A (en) Dispenser with cartridge aligning means
US5236105A (en) Method of preventing over-ejection of compound from a caulking gun
MXPA97001895A (en) Spray gun and cartridge with means to prevent scratching after the application
US3378175A (en) Piston for material dispensing gun cartridge
JP2007268189A (en) Syringe
AU697800B2 (en) Caulking gun and cartridge with afterflow prevention
US6443333B1 (en) Caulking cartridge with afterflow prevention and improved purging of cartridge contents
JP4743870B2 (en) Syringe
US2284602A (en) Plastic material dispenser
JP3472743B2 (en) Glue cartridge and glue extrusion gun
CA1047458A (en) Contents-conserving plunger for cartridge
JPH0685065U (en) Discharge device cartridge and discharge device

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040517

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20050201

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050221

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090225

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100225

Year of fee payment: 5

LAPS Cancellation because of no payment of annual fees