JP2004237213A

JP2004237213A - Cleaning device

Info

Publication number: JP2004237213A
Application number: JP2003029262A
Authority: JP
Inventors: Wataru Nishida; 渉西田; Takao Nishino; 隆夫西野
Original assignee: Shibuya Kogyo Co Ltd; Shibuya Machinery Co Ltd
Current assignee: Shibuya Corp
Priority date: 2003-02-06
Filing date: 2003-02-06
Publication date: 2004-08-26
Anticipated expiration: 2023-02-06
Also published as: JP4201324B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning device by which a stubborn deposition strongly stuck to the surface of a work can efficiently be removed without damaging print applied to the base of the deposition and the surface of the work. <P>SOLUTION: The cleaning device is provided with a work conveyance means 3 of conveying a work 1, storage parts 15 and 27 for a cleaning liquid, spray nozzles 11 of spraying the cleaning liquid, and high pressure pumps 20 and 21 of feeding the cleaning liquid from the storage part 15 to the spray nozzles 11. The space between the high pressure pumps 20 and 21 and the spray nozzles 11 is provided with switching means 22 and 23 of flowing the cleaning liquid to either the spray nozzles 11 or the storage part 27, and the switching means 22 and 23 are switched in such a manner that the cleaning liquid which has been flowed to the spray nozzles 11 on the stop of the conveyance of the work 1 is flowed to the storage part 27. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、物品収容用の樹脂ケース等の被洗浄物としてのワーク表面に付着したラベルやラベル貼付用の糊などの頑固な付着物の除去に好適な洗浄装置に関する。
【０００２】
【従来の技術】
流通過程などで物品の収容ケースとして使用される樹脂ケースは、表面にラベル等を貼付した状態で使用される場合が多く、使用後には回収してラベル等を除去した上、再使用されるのが一般的である。この種の樹脂ケース等の被洗浄物としてのワーク表面に付着したラベルなどの除去手段としては、高圧温水シャワーと高圧回転噴射ノズルとを組合わせて用いるものや、ワーク表面に対して水や温水からなる偏平状の噴射流を傾斜させて吹付けるものなどが知られている（特許文献１、特許文献２）。しかしながら、ラベルのケース表面からの剥離自体は手作業や高圧の噴射流の吹付けによって比較的容易であるが、ラベルの除去後に残るケース表面に付着したラベル貼付用の糊は強固にこびり付いており、これをきれいに除去することは技術的に簡単ではなかった。特に、完全に除去されていない糊の上に更に別のラベルが繰返し貼付された場合には、糊が益々強固にこびり付いてしまい、非常に強力な噴射流を使用しないと除去することはできなかった。この点では、前記従来技術においても例外ではなかった。一方、ラベルはケース表面の平坦な部分に貼付されるのが一般的であり、その平坦部分には、会社名や商品名等が印刷されている場合が多い。したがって、ケース表面に強固にこびり付いた糊を除去するためにあまり強力な噴射流を使用すると、糊と同時に糊の下地に施された印刷も消してしまうという技術的問題があった。このため、弱めの噴射流を用いて、ある程度の糊の残存は妥協するか、非効率でも長い時間をかけてより完全に除去するのが実情であった。
【０００３】
【特許文献１】
特開平６−１９８２６４号公報
【特許文献２】
特開昭５２−１０３８６６号公報
【０００４】
【発明が解決しようとする課題】
本発明は、以上のような従来の技術事情に鑑みて発明したものであり、前述のように樹脂ケースの表面に強固にこびり付いたラベル貼付用の糊等の頑固な付着物も効率的に除去し得るとともに、その付着物の下地に施された印刷やワーク表面の損傷を大幅に軽減可能な洗浄装置を提供することを目的とするものである。
【０００５】
【課題を解決するための手段】
本発明は、前記課題を解決するため、ワークを搬送するワーク搬送手段と、洗浄液の貯留部と、洗浄液を噴射する噴射ノズルと、洗浄液を貯留部から噴射ノズルに供給する高圧ポンプとを備え、ワークを搬送しつつ噴射ノズルから高圧の噴射流を吹付けて洗浄する洗浄装置において、前記高圧ポンプと噴射ノズルとの間に洗浄液を噴射ノズルか貯留部のどちらか一方に流す切換手段を設け、その切換手段を前記ワークの搬送停止時に噴射ノズルへ流れていた洗浄液を貯留部に流すように切換えるという技術手段を採用した。なお、洗浄液の貯留部に関しては、１個の貯留部を設けて、ワークの搬送停止時に洗浄液を切換手段から逃すための戻り洗浄液を同じ洗浄液供給用の貯留部へ戻すように構成してもよいし、噴射ノズルへの洗浄液供給用の第１貯留部と切換手段からの戻り洗浄液を回収可能な第２貯留部とに分けて構成してもよい（請求項２）。因みに、切換手段からの戻り洗浄液を同じ貯留部へ戻す場合には、その戻り洗浄液の勢いにより貯留部内の洗浄液が泡立ち、その泡を含んだ洗浄液を高圧ポンプが吸込んでキャビテーションを起してトラブルの原因になるおそれもあるが、第１貯留部と第２貯留部に分けて構成するようにすれば、この問題は解消することができる。
【０００６】
本発明によれば、以上の技術手段の採用により、前記ワークの搬送停止時には、噴射ノズルへ流れていた洗浄液は貯留部側に切換えられ、噴射ノズルからの噴射流の吹付けが直ちに停止されるので、動きが停止した状態においてワークの同じ場所に噴射流が継続的に吹付けられる事態は回避される。すなわち、噴射ノズルからの噴射流の吹付けはワークの移動中に限られることから、強固に付着した頑固な付着物の除去に適合したきわめて強力な噴射流を用いても、その付着物の下地に施された印刷やワーク表面は殆ど損傷することなく、目的の頑固な付着物のみを除去することが可能になる。
【０００７】
しかも、ワークの搬送停止時に噴射ノズルからの噴射流の吹付けを停止する手段として、洗浄液を噴射ノズルか貯留部のどちらか一方に流すように流路を切換える流体的な切換手段を採用したので、再起動の際の電気的負荷が大きく、立上がりに時間がかかる高圧ポンプの起動停止制御による場合などに比べて動作の応答性がよく、簡単な構成により切換動作を速くかつ安定的に実行することができる。なお、前記切換手段の動作信号に関しては、当該洗浄装置用のワーク搬送手段の駆動機構に対する停止指令信号や、その当該洗浄装置用のワーク搬送手段やワーク自体の停止状態を適宜のセンサにより検出して得た停止状態検出信号を前記切換手段を切換る動作信号として用いることができる。また、当該洗浄装置用のワーク搬送手段に接続されたケーサやパレタイザ等の他の処理装置用のワーク搬送手段がトラブル等により停止されると、そのライン上の全行程でワークの搬送が停止され、当該洗浄装置用のワーク搬送手段も停止される関係にあることから、ライン上の他の処理装置用のワーク搬送手段の駆動機構に対する停止指令信号や、その他の処理装置用のワーク搬送手段やワーク自体の停止状態を適宜のセンサにより検出して得た停止状態検出信号を前記切換手段を切換る動作信号として用いることも可能である（請求項３）。
【０００８】
【発明の実施の形態】
本発明に係る洗浄装置は、前述の樹脂ケースに限らず種々のワークの表面に付着した付着物を除去する場合に広く適用することができる。その除去の対象である付着物の種類に関しては、前述のラベルやラベル貼着用の糊に限らず種々の付着物の除去に適用することができる。前記洗浄液の種類に関しては、水道水などの普通水や加熱した温水に限らず、更に界面活性剤などの洗浄剤を加えて洗浄力や殺菌力を向上させたものや、適宜の粉粒体からなる研掃材などを加えて、その物理的作用により剥離力を向上させたものでもよい。また、噴射ノズルの種類に関しては、付着物の種類などに応じて、洗浄液からなる液体流を噴射する形態のものや、洗浄液に気体を混合して形成した気液混合流を噴射する形態のものでもよい。その噴射ノズルから噴射される噴射流の形状に関しては、断面が円形状の噴射流でもよいし、偏平状の幅広の噴射流でもよい。前述のように洗浄液の貯留部に関しては、１個の貯留部からなり、ワークの搬送停止時に洗浄液を切換手段から逃すための戻り洗浄液を同じ洗浄液供給用の貯留部へ戻すように構成してもよいし、噴射ノズルへの洗浄液供給用の第１貯留部と切換手段からの戻り洗浄液を回収可能な第２貯留部とに分けて構成してもよい。さらに、以下の実施例のように、使用済みの洗浄液を回収する回収タンクを前記第２貯留部として使用することも可能である。
【０００９】
【実施例】
以下、図面を用いて本発明の実施例に関して説明する。図１は本発明の一実施例の要部を示した概略構成図であり、図２はそのＡ−Ａ矢視図である。図示のように、本実施例では、樹脂ケース等のワーク１は、下流側から順次接続されたワーク搬送手段２〜４により搬送され、その途中に配設された洗浄装置５を通過する際に洗浄が実施されるように構成した。洗浄装置５用のワーク搬送手段３には係止片６が設けてあり、下流側のワーク搬送手段２上を接触状態で搬送された各ワークは、前記係止片６に係止されて所定の間隔をあけて搬送されるように構成した。ワーク１に対する係止片６の係止位置はどこでもよいが、例えば樹脂ケースなどを上下反転した状態で搬送しながら洗浄を実施する場合に好適な、ワーク１の進行方向前部に係止させる図示の形態や、ワーク１の進行方向後部に係止させる形態が簡便である。係止片６を付設した無端走行体７は、駆動輪８に連結されたモータ９により所定の速度で駆動される。モータ９は制御装置１０に接続され、その制御装置１０により無端走行体７の起動停止制御や速度制御が実行される。すなわち、制御装置１０を通じて、洗浄装置５の通常の運転開始及び運転停止、あるいは洗浄装置５のトラブルによる運転停止、さらには他の処理装置からの運転信号などに基づいてワーク搬送手段３に関する起動停止制御や速度制御が実行されることになる。因みに、ワーク搬送手段３の速度、すなわち係止片６の移動速度は、ワーク１の種類や洗浄の対象である付着物の種類、噴射ノズルの噴射速度などを勘案しながら、下地の印刷やワーク表面を損傷することなく、目的の付着物のみを効率的に除去できる速度に設定する。
【００１０】
次に、本発明の特徴部分である前記洗浄装置５に関して説明する。図２に示したように、本実施例では、ワーク１の両側にそれぞれ高さを変えて５個ずつの噴射ノズル１１ａ〜１１ｅ，１２ａ〜１２ｅを設置した。因みに、それらの本実施例に係る噴射ノズル１１ａ〜１１ｅ，１２ａ〜１２ｅは、大気を吸引して液滴状の噴射流を形成するように構成した。そして、両側の上から３個の噴射ノズル１１ａ〜１１ｃと１２ａ〜１２ｃに関しては、供給管１３，１４を介して一つにまとめて、第１貯留部１５に接続された供給管１６に接続した。また、両側の下から２個の噴射ノズル１１ｄ，１１ｅと１２ｄ，１２ｅに関しては、供給管１７，１８を介して一つにまとめて、前記第１貯留部１５に接続された供給管１９に接続した。さらに、前記供給管１６，１９の、第１貯留部１５側には高圧ポンプ２０，２１を配設し、それらの高圧ポンプ２０，２１と前記噴射ノズルとの間には３ポート２位置形の切換弁等からなる切換手段２２，２３を配設した。また、切換手段２２，２３の他のポートにはワークの搬送停止時に洗浄液を切換手段から逃すための戻り管２４，２５を接続し、集液ガイド２６を経て第２貯留部２７に回収されるように構成した。因みに、この本実施例における第２貯留部２７は、使用済みの洗浄液の回収タンクとしても機能するように構成されている。さらに、前記第１貯留部１５と第２貯留部２７とは、図示のように連通管２８で接続するとともにポンプ２９を配設し、回収された洗浄液を再使用するように構成している。この場合には、必要に応じて連通管２８の途中にフィルタ等を配設することができる。なお、図１に示したように、切換手段２２，２３の切換動作は前記制御装置１０によって制御されるように構成されている。
【００１１】
次に、本発明に係る洗浄装置５の動作に関して説明する。通常の運転時においては、ワーク１は下流側のワーク搬送手段２上を接触状態で搬送され、ワーク搬送手段３の導入部分に次々に達すると、それらのワーク１に対して順次係止片６が係止され、間隔をあけながらワーク搬送手段３上を所定の速度で搬送される。ワーク１は、ワーク搬送手段３上を所定の搬送速度で移動しながら、その間に洗浄装置５からの洗浄作用を受ける。すなわち、ワーク１に対しては、ワーク搬送手段３上を所定の搬送速度で移動する間に、両側に配設された噴射ノズル１１ａ〜１１ｅ及び噴射ノズル１２ａ〜１２ｅから強力な噴射流が吹付けられ、前述のように樹脂ケースの表面に付着したラベル及びその糊などの頑固な付着物も次々に効率的に除去される。この場合、噴射ノズル１１ａ〜１１ｅ及び噴射ノズル１２ａ〜１２ｅからの噴射速度や、ワーク搬送手段３の搬送速度は、前述のようにワーク１の種類や洗浄の対象である付着物の種類などを勘案しながら、高圧ポンプ２０，２１やモータ９の制御を通じて、付着物の下地に施された印刷やワーク表面を損傷することなく、目的の付着物のみを効率的に除去できるように設定する。
【００１２】
しかして、何らかの理由によりワーク搬送手段３が停止され、洗浄中のワーク１が停止する場合には、制御装置１０を介して切換手段２２，２３が直ちに切換えられ、高圧ポンプ２０，２１により昇圧された洗浄液は、戻り管２４，２５を経て逃げ、第２貯留部２７に回収されることになる。したがって、噴射ノズル１１ａ〜１１ｅ及び噴射ノズル１２ａ〜１２ｅからの噴射も直ちに停止され、その強力な噴射流によるワーク表面やそこに施された印刷の損傷も回避される。すなわち、ここに本発明の効用があり、洗浄中のワークが停止した場合には直ちに噴射ノズルからの噴射も停止されることから、通常運転時のワークが移動しながら実施される噴射ノズルからの吹付けにおいては、その噴射速度を上げて強力にこびり付いた頑固な付着物にも対向できる強力な噴射流の使用が可能となるのである。なお、制御装置１０を介して切換手段２２，２３を切換えるための動作信号は、前述のように当該ワーク搬送手段３に係る停止指令信号や停止状態検出信号でもよいし、ライン上の他の処理装置用のワーク搬送手段に係る停止指令信号や停止状態検出信号でもよい。因みに、切換手段２２，２３としては、３ポート２位置形の切換弁等の流体的な切換手段を採用したので、高圧ポンプの起動停止制御による場合などに比べて動作の応答性がよく、簡単な構成により切換動作を速くかつ安定的に実行することができる。
【００１３】
以上のようにして、両側面に対する洗浄が済んだワーク１は、下流側のワーク搬送手段４を経てケーサやパレタイザなどの他の処理装置に搬送されることになる。その際、必要に応じて、下流側においてワーク１の向きを水平方向に９０度回転して前記洗浄装置５と同様の洗浄装置により他の側面を洗浄したり、内面等を洗浄した上で、ワーク１をケーサ等に搬送するように構成してもよい。
【００１４】
【発明の効果】
本発明によれば、洗浄液を貯留部から噴射ノズルに供給する高圧ポンプと噴射ノズルとの間に、洗浄液を噴射ノズルと貯留部のどちらか一方に流す切換手段を設け、その切換手段をワークの搬送停止時に噴射ノズルへ流れていた洗浄液を貯留部に流すように切換えるという技術手段を採用したので、次の効果を得ることができる。
（１）ワークの搬送停止時には、噴射ノズルへ流れていた洗浄液は貯留部側に切換えられ、噴射ノズルからの高圧の噴射流の吹付けは直ちに停止されることから、動きが停止した状態においてワークの同じ場所に噴射流が継続して吹付けられる事態は回避される。
（２）その結果、噴射ノズルからの噴射流の吹付けはワークの移動中に限られることから、強固に付着した頑固な付着物の除去に適合したきわめて強力な噴射流を用いても、その付着物の下地に施された印刷やワーク表面を殆ど損傷することなく、目的の頑固な付着物のみを除去することが可能になる。
（３）したがって、ワーク表面に付着した頑固な付着物の効率的な除去が可能であるとともに、その付着物の下地に施された印刷やワーク表面に対する損傷を大幅に軽減することが可能である。
（４）しかも、ワークの搬送停止時に噴射ノズルからの噴射流の吹付けを停止する手段として、洗浄液を噴射ノズルと貯留部のどちらか一方に流すように流路を切換える流体的な切換手段を採用したので、前記高圧ポンプを起動停止制御する場合などに比べて動作の応答性がよく、簡単な構成により、動作が速くかつ安定的な切換動作が得られる。
（５）洗浄液の貯留部を供給側の第１貯留部と回収側の第２貯留部に分けて構成するようにすれば、切換手段からの戻り洗浄液の勢いにより貯留部内の洗浄液が泡立ち、その泡を含んだ洗浄液を高圧ポンプが吸込んでキャビテーションを起してトラブルの原因になるおそれは、解消することができる。
【図面の簡単な説明】
【図１】本発明の一実施例の要部を示した概略構成図である。
【図２】図１におけるＡ−Ａ矢視図である。
【符号の説明】
１…ワーク、２〜４…ワーク搬送手段、５…洗浄装置、６…係止片、７…無端走行体、８…駆動輪、９…モータ、１０…制御装置、１１ａ〜１１ｅ，１２ａ〜１２ｅ…噴射ノズル、１３，１４…供給管、１５…第１貯留部、１６〜１９…供給管、２０，２１…高圧ポンプ、２２，２３…切換手段、２４，２５…戻り管、２６…集液ガイド、２７…第２貯留部、２８…連通管、２９…ポンプ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cleaning apparatus suitable for removing stubborn adherents such as a label adhered to the surface of a work as an object to be cleaned such as a resin case for accommodating articles and glue for label attachment.
[0002]
[Prior art]
In many cases, resin cases used as storage cases for goods in the distribution process are used with labels attached to the surface, and after use, they are collected, removed, and reused. Is common. As a means for removing a label or the like attached to the surface of a work as an object to be cleaned such as a resin case of this kind, a method using a combination of a high-pressure hot water shower and a high-pressure rotary spray nozzle, or a method of removing water or hot water from the work surface is used. And the like are known in which a flat jet stream made of air is sprayed while being inclined (Patent Documents 1 and 2). However, the peeling of the label itself from the case surface is relatively easy by hand or by spraying a high-pressure jet stream.However, the label sticking glue attached to the case surface remaining after the label is removed is strongly adhered. Removing it cleanly was not technically easy. In particular, when another label is repeatedly applied on the glue that has not been completely removed, the glue sticks more and more and cannot be removed without using a very powerful jet stream. Was. In this respect, the prior art is no exception. On the other hand, the label is generally attached to a flat portion of the case surface, and the flat portion is often printed with a company name, a product name, or the like. Therefore, if a too strong jet is used to remove the glue that has firmly adhered to the case surface, there has been a technical problem that the printing applied to the glue base as well as the glue will be erased. For this reason, it has been the fact that, using a weak jet flow, some amount of glue remains is compromised, or even if it is inefficient, it is removed more completely over a long period of time.
[0003]
[Patent Document 1]
JP-A-6-198264 [Patent Document 2]
JP-A-52-103866.
[Problems to be solved by the invention]
The present invention was devised in view of the above-mentioned conventional technical circumstances, and efficiently removes stubborn deposits such as glue for label sticking firmly sticking to the surface of the resin case as described above. It is another object of the present invention to provide a cleaning apparatus which can perform printing and damage to the surface of a workpiece, which can be significantly reduced, as well as the surface of the adhered substance.
[0005]
[Means for Solving the Problems]
The present invention, in order to solve the above-described problems, includes a work transfer means for transferring a work, a storage unit for the cleaning liquid, an injection nozzle for injecting the cleaning liquid, and a high-pressure pump for supplying the cleaning liquid to the injection nozzle from the storage unit, In a cleaning apparatus for cleaning by spraying a high-pressure jet from an injection nozzle while transporting a work, a switching unit for flowing a cleaning liquid to one of an injection nozzle and a storage unit is provided between the high-pressure pump and the injection nozzle, A technical means is adopted in which the switching means is switched so that the cleaning liquid flowing to the injection nozzle when the transfer of the work is stopped flows to the storage section. In addition, as for the storage part of the cleaning liquid, one storage part may be provided to return the cleaning liquid for releasing the cleaning liquid from the switching means to the same storage part for supplying the cleaning liquid when the transfer of the work is stopped. In addition, the first storage unit for supplying the cleaning liquid to the injection nozzle and the second storage unit capable of collecting the return cleaning liquid from the switching unit may be configured separately. By the way, when returning the return cleaning liquid from the switching means to the same storage section, the cleaning liquid in the storage section foams due to the force of the return cleaning liquid, and the high-pressure pump sucks the cleaning liquid containing the bubbles to cause cavitation and cause trouble. Although this may cause a problem, this problem can be solved by configuring the first storage unit and the second storage unit separately.
[0006]
According to the present invention, by employing the above technical means, when the transfer of the work is stopped, the cleaning liquid flowing to the injection nozzle is switched to the storage section side, and the spraying of the injection flow from the injection nozzle is immediately stopped. Therefore, it is possible to avoid a situation in which the jet flow is continuously blown to the same place of the work when the movement is stopped. In other words, since the spray of the spray from the spray nozzle is limited during the movement of the work, even if an extremely powerful spray that is suitable for removing firmly attached stubborn deposits is used, It is possible to remove only the intended stubborn deposit without substantially damaging the printed or workpiece surface.
[0007]
Moreover, as a means for stopping the spray of the jet flow from the injection nozzle when the transfer of the work is stopped, a fluid switching means for switching the flow path so as to flow the cleaning liquid to either the injection nozzle or the storage section is employed. The electric load at the time of restarting is large, the responsiveness of the operation is good as compared with the case of the start / stop control of the high-pressure pump which takes a long time to start up, and the switching operation is performed quickly and stably with a simple configuration. be able to. Regarding the operation signal of the switching means, a stop command signal to the drive mechanism of the work transfer means for the cleaning device and the stop state of the work transfer means and the work itself for the cleaning device are detected by an appropriate sensor. The obtained stop state detection signal can be used as an operation signal for switching the switching means. Further, if the work transfer means for another processing device such as a caser or a palletizer connected to the work transfer means for the cleaning device is stopped due to a trouble or the like, the transfer of the work is stopped in all the strokes on the line. Since the work transfer means for the cleaning device is also stopped, the stop command signal to the drive mechanism of the work transfer means for another processing device on the line, and the work transfer means for the other processing device, It is also possible to use a stop state detection signal obtained by detecting the stop state of the work itself by an appropriate sensor as an operation signal for switching the switching means (claim 3).
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The cleaning device according to the present invention can be widely applied not only to the above-described resin case but also to the case of removing deposits attached to the surface of various works. The type of the attached matter to be removed is not limited to the above-described label or the paste for attaching the label, and can be applied to the removal of various kinds of attached matter. With respect to the type of the cleaning liquid, not only ordinary water such as tap water or heated warm water, but also a cleaning agent such as a surfactant, which has been added to improve the detergency and bactericidal power, or from appropriate powders and granules A material having improved peeling force by a physical action by adding an abrasive material or the like may be used. Regarding the type of the injection nozzle, a type in which a liquid flow composed of a cleaning liquid is jetted, or a type in which a gas-liquid mixed flow formed by mixing a gas with the cleaning liquid is jetted, according to the type of the deposit, etc. May be. Regarding the shape of the jet flow jetted from the jet nozzle, a jet jet having a circular cross section or a flat jet jet may be used. As described above, the storage section for the cleaning liquid is constituted by one storage section, and the return cleaning liquid for allowing the cleaning liquid to escape from the switching means when the transfer of the work is stopped may be returned to the same storage section for supplying the cleaning liquid. Alternatively, it may be configured to be divided into a first storage unit for supplying the cleaning liquid to the injection nozzle and a second storage unit capable of collecting the cleaning liquid returned from the switching unit. Further, as in the following embodiment, a collection tank for collecting used cleaning liquid can be used as the second storage unit.
[0009]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a main part of an embodiment of the present invention, and FIG. 2 is a view taken along the line AA of FIG. As shown in the drawing, in the present embodiment, a work 1 such as a resin case is conveyed from a downstream side by work conveying means 2 to 4 which are sequentially connected, and passes through a cleaning device 5 arranged in the middle thereof. The cleaning was configured to be performed. The work transfer means 3 for the cleaning device 5 is provided with a locking piece 6, and each work conveyed in a contact state on the downstream work transfer means 2 is locked by the locking piece 6 to a predetermined position. It is configured to be conveyed at intervals of. The locking position of the locking piece 6 with respect to the work 1 may be any position. For example, when the cleaning is performed while transporting the resin case in an upside down state, the work is locked at the front of the work 1 in the traveling direction. And the form in which the work 1 is locked at the rear in the traveling direction is simple. The endless running body 7 provided with the locking pieces 6 is driven at a predetermined speed by a motor 9 connected to driving wheels 8. The motor 9 is connected to a control device 10, and the control device 10 executes start / stop control and speed control of the endless traveling body 7. That is, through the control device 10, the normal operation start and stop of the cleaning device 5, the operation stop due to the trouble of the cleaning device 5, and the start / stop of the work transfer means 3 based on an operation signal from another processing device or the like. Control and speed control are executed. Incidentally, the speed of the work transfer means 3, that is, the moving speed of the locking piece 6, depends on the type of the work 1, the type of the adhered substance to be cleaned, the injection speed of the injection nozzle, and the like. The speed is set so that only the target deposit can be efficiently removed without damaging the surface.
[0010]
Next, the cleaning device 5 which is a feature of the present invention will be described. As shown in FIG. 2, in the present embodiment, five injection nozzles 11 a to 11 e and 12 a to 12 e are provided on both sides of the work 1 with different heights. Incidentally, the injection nozzles 11a to 11e and 12a to 12e according to the present embodiment are configured to suction the atmosphere to form a droplet-shaped injection flow. Then, the three spray nozzles 11a to 11c and 12a to 12c from the top on both sides were put together through supply pipes 13 and 14 and connected to the supply pipe 16 connected to the first storage unit 15. . Further, the two injection nozzles 11d, 11e and 12d, 12e from below on both sides are put together through supply pipes 17, 18 and connected to a supply pipe 19 connected to the first storage section 15. did. Further, high-pressure pumps 20, 21 are disposed on the supply pipes 16, 19 on the first storage section 15 side, and a three-port two-position type is provided between the high-pressure pumps 20, 21 and the injection nozzle. Switching means 22 and 23 including switching valves and the like are provided. In addition, return pipes 24 and 25 are connected to the other ports of the switching means 22 and 23 to allow the cleaning liquid to escape from the switching means when the transfer of the work is stopped, and are collected in the second storage unit 27 via the liquid collection guide 26. It was configured as follows. Incidentally, the second storage section 27 in this embodiment is configured to also function as a recovery tank for the used cleaning liquid. Further, the first storage section 15 and the second storage section 27 are connected by a communication pipe 28 as shown in the figure, and a pump 29 is provided, so that the collected cleaning liquid is reused. In this case, a filter or the like can be provided in the communication pipe 28 as needed. In addition, as shown in FIG. 1, the switching operation of the switching means 22 and 23 is configured to be controlled by the control device 10.
[0011]
Next, the operation of the cleaning device 5 according to the present invention will be described. During normal operation, the work 1 is conveyed in a contact state on the work transfer means 2 on the downstream side, and when the work 1 reaches the introduction portion of the work transfer means 3 one after another, the locking pieces 6 are sequentially engaged with the work 1. Are transported at a predetermined speed on the work transporting means 3 with an interval. The work 1 receives a cleaning action from the cleaning device 5 while moving on the work transfer means 3 at a predetermined transfer speed. That is, while moving on the work transfer means 3 at a predetermined transfer speed, the work 1 is sprayed with a strong spray flow from the spray nozzles 11a to 11e and the spray nozzles 12a to 12e arranged on both sides. As described above, the stubborn deposits such as the label and the glue attached to the surface of the resin case are efficiently removed one after another. In this case, the injection speeds from the injection nozzles 11a to 11e and the injection nozzles 12a to 12e, and the transfer speed of the work transfer unit 3 are determined in consideration of the type of the work 1 and the type of deposits to be cleaned as described above. Meanwhile, through the control of the high-pressure pumps 20 and 21 and the motor 9, the setting is made so that only the target deposit can be efficiently removed without damaging the printing or work surface applied to the base of the deposit.
[0012]
When the work transporting means 3 is stopped for some reason and the work 1 being washed is stopped, the switching means 22 and 23 are immediately switched via the control device 10 and the pressure is increased by the high-pressure pumps 20 and 21. The washed liquid escapes through the return pipes 24 and 25 and is collected in the second storage section 27. Therefore, the ejection from the ejection nozzles 11a to 11e and the ejection nozzles 12a to 12e is also stopped immediately, and damage to the work surface and the print applied thereto due to the strong ejection flow is also avoided. That is, there is an effect of the present invention, and when the work being cleaned is stopped, the injection from the injection nozzle is also stopped immediately. In the spraying, it is possible to use a strong jet flow that can increase the jet speed and oppose a strongly adhered stubborn deposit. The operation signal for switching the switching units 22 and 23 via the control device 10 may be the stop command signal or the stop state detection signal for the work transfer unit 3 as described above, or other processing on the line. It may be a stop command signal or a stop state detection signal relating to the work transfer means for the apparatus. By the way, as the switching means 22 and 23, a fluid switching means such as a three-port two-position switching valve is adopted, so that the operation responsiveness is better and simpler than in the case of starting and stopping control of the high-pressure pump. With this configuration, the switching operation can be performed quickly and stably.
[0013]
As described above, the work 1 whose both sides have been cleaned is transferred to another processing device such as a caser or a palletizer via the work transfer means 4 on the downstream side. At that time, if necessary, the work 1 is rotated by 90 degrees in the horizontal direction on the downstream side, and the other side surface is washed by the same washing device as the washing device 5 or the inner surface or the like is washed. The work 1 may be configured to be conveyed to a caser or the like.
[0014]
【The invention's effect】
According to the present invention, switching means for flowing the cleaning liquid to one of the injection nozzle and the storage section is provided between the high-pressure pump for supplying the cleaning liquid from the storage section to the injection nozzle and the injection nozzle, and the switching means is provided for the work. Since the technical means of switching the cleaning liquid flowing to the injection nozzle to flow into the storage part when the conveyance is stopped is employed, the following effects can be obtained.
(1) When the transfer of the work is stopped, the cleaning liquid flowing to the spray nozzle is switched to the storage section side, and the spray of the high-pressure spray from the spray nozzle is immediately stopped. The situation in which the jet flow is continuously sprayed to the same place of the above is avoided.
(2) As a result, since the spraying of the jet stream from the jet nozzle is limited during the movement of the work, even if an extremely powerful jet stream adapted for removing firmly attached stubborn deposits is used, It is possible to remove only the target stubborn deposits without substantially damaging the printing or the work surface applied to the base of the deposits.
(3) Therefore, it is possible to efficiently remove stubborn deposits adhered to the work surface, and to significantly reduce damage to printing or work surface applied to the base of the adhered materials. .
(4) In addition, as a means for stopping the spray of the jet flow from the injection nozzle when the transfer of the work is stopped, a fluid switching means for switching the flow path so that the cleaning liquid flows to one of the injection nozzle and the storage section. Since the adoption is employed, the responsiveness of the operation is better than in the case where the high-pressure pump is controlled to be started and stopped, and a quick and stable switching operation can be obtained with a simple configuration.
(5) If the storage part of the cleaning liquid is divided into the first storage part on the supply side and the second storage part on the recovery side, the cleaning liquid in the storage part foams due to the force of the return cleaning liquid from the switching means, and The possibility that the high-pressure pump sucks the cleaning solution containing bubbles to cause cavitation and cause troubles can be eliminated.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a main part of an embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrows AA in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Work, 2-4 ... Work conveyance means, 5 ... Cleaning device, 6 ... Locking piece, 7 ... Endless running body, 8 ... Drive wheel, 9 ... Motor, 10 ... Control device, 11a-11e, 12a-12e ... injection nozzles, 13, 14 ... supply pipes, 15 ... first storage section, 16-19 ... supply pipes, 20, 21 ... high-pressure pump, 22, 23 ... switching means, 24, 25 ... return pipes, 26 ... liquid collection Guide, 27: second storage unit, 28: communication pipe, 29: pump

Claims

ワークを搬送するワーク搬送手段と、洗浄液の貯留部と、洗浄液を噴射する噴射ノズルと、洗浄液を貯留部から噴射ノズルに供給する高圧ポンプとを備え、ワークを搬送しつつ噴射ノズルから高圧の噴射流を吹付けて洗浄する洗浄装置において、前記高圧ポンプと噴射ノズルとの間に洗浄液を噴射ノズルか貯留部のどちらか一方に流す切換手段を設け、その切換手段を前記ワークの搬送停止時に噴射ノズルへ流れていた洗浄液を貯留部に流すように切換えるように構成したことを特徴とする洗浄装置。A work transfer means for transferring the work, a reservoir for the cleaning liquid, an injection nozzle for injecting the cleaning liquid, and a high-pressure pump for supplying the cleaning liquid from the storage to the injection nozzle are provided. In a cleaning apparatus for performing cleaning by spraying a flow, switching means for flowing a cleaning liquid to one of an injection nozzle and a storage section is provided between the high-pressure pump and the injection nozzle, and the switching means is injected when the transfer of the workpiece is stopped. A cleaning apparatus characterized in that the cleaning liquid is switched so as to flow the cleaning liquid flowing to the nozzle to the storage section.

前記貯留部を、洗浄液を噴射ノズルへ供給する第１貯留部とワークの搬送停止時に洗浄液を切換手段から逃すための戻り洗浄液を回収する第２貯留部とに分けて構成した請求項１に記載の洗浄装置。2. The storage unit according to claim 1, wherein the storage unit is divided into a first storage unit that supplies the cleaning liquid to the spray nozzle and a second storage unit that collects a return cleaning liquid for allowing the cleaning liquid to escape from the switching unit when the conveyance of the work is stopped. Cleaning equipment.

前記ワーク搬送手段は他の処理装置に接続され、その他の処理装置からのワーク搬送停止信号に基づいて前記切換手段を切換えるように構成した請求項１又は２に記載の洗浄装置。3. The cleaning apparatus according to claim 1, wherein said work transport means is connected to another processing apparatus, and is configured to switch said switching means based on a work transport stop signal from the other processing apparatus.