200819207 (1) 九、發明說明 【發明所屬之技術領域】 本發明關於使農藥等的導電性液體之噴霧液滴帶電， 並將前述噴霧液滴有效率地附著於農作物等的對象物用之 靜電噴霧裝置。本發明又關於作爲該靜電噴霧裝置的構成 要件來使用之理想的噴嘴管蓋。 【先前技術】 作爲靜電噴霧裝置的一種，在噴霧竿的前部具備靜電 噴霧部，以手等握持前述噴霧竿的後端部側進行靜電噴霧 作業之靜電噴霧裝置爲眾所皆知。前述靜電噴霧部具備將 農藥等的液體作成無數微小的液滴並加以噴出之噴霧噴嘴 、及配設成接近前述液體的擴大範圍的外側之電極，藉由 對該電極施加高電壓，來對由前述噴霧噴嘴所噴出的液滴 賦予電荷。藉此，可理想地提昇前述噴霧液滴對具有反極 性的農產物等之附著性。 但，前述噴霧液滴不僅對農產物，亦容易附著於前述 靜電噴霧部或前述噴霧竿。此成爲前述靜電噴霧裝置之缺 點。 即，當因連續進行噴霧作業，使噴霧液滴對前述靜電 噴霧部的附著範圍變大時，則會導致電壓洩漏變大，變得 不易進行有效的靜電賦予。又，在成爲接地電位部之前述 噴霧噴嘴，透過形成於前述靜電噴霧部的表面之噴霧液滴 的連續膜來與前述電極導通之情況，會變得無法進行靜電 -4- 200819207 (2) 賦予。 同樣地，附著於前述噴霧竿的表面之噴霧液 續膜，此連續膜逐漸朝以手握持操作前述噴霧竿 手邊側延伸。由於農藥的前述連續膜具有導電性 ~ 此連續膜到達作業者的手邊時，則會經由握持前 的握把之作業者，產生短路或感電等的問題。 因此，以往如在日本特開2005-324 1 8 1號公 文獻1 )，提案有將一端側開口而另一端側閉口 ，與噴霧噴嘴呈同心狀地設置於噴嘴蓋內。又， 滴不易進入至前述筒狀部的內部，所以能夠使液 膜在前述筒狀部處斷開，因而能夠防止漏電產生 又，在日本特開2006-2 1 1 48號公報（專利 ，提案有利用壓縮機的壓縮空氣，將噴嘴蓋內之 強制地排出至外部之技術。 且，在日本特開2005-193225號公報（專利 ，提案有在噴霧竿的長度方向之中途部，設置圍 環狀凹部的技術。作爲此環狀凹部，記載著其深 前述噴霧竿的長度方向者，且記載著在前述噴霧 之前端部側設置前述環狀凹部。藉由前述結構， 環狀凹部，將噴霧液滴的連續膜確實地斷開。 【發明內容】 在前述專利文獻1，若連續長時間進行噴霧 ，則無法避免噴霧液滴進入至前述筒狀部內。因 滴成爲連 的作業者 ，故，當 述噴霧竿 報（專利 之筒狀部 因噴霧液 滴的連續 〇 文獻 2 ) 噴霧液滴 文獻3 ) 著全周之 部延伸於 竿的握把 可在前述 作業的話 此，需要 •5 - 200819207 (3) 定期地洗淨前述筒狀部內部或前述噴嘴蓋的內周面。 但，專利文獻1，因前述筒狀部的另一端側關閉，所 以不易使洗淨水排除，無法充分地清掃前述筒狀部的深部 〇 又，前述專利文獻2，在進行噴霧作業時，因需要壓 縮機及其驅動源，所以，費工且成本高。 在前述專利文獻3，若連續長時間進行噴霧作業的話 ，雖噴霧液滴會進入至前述環狀凹部，但，因前述環狀凹 部的深底部關閉，所以，用來洗淨之水不易排除，無法充 分地清掃到前述環狀凹部之深底部。 本發明是有鑑於前述情事而開發完成之發明，其目的 在於提供，不易產生電極間之短路或漏電所引起的電壓下 降，並且廉價且容易、確實地進行清掃之靜電噴霧裝置及 噴嘴管蓋。 又，本發明之另一目的在於提供，能夠有效地斷開噴 霧液滴的連續膜，並且容易且確實地進行噴霧竿的清掃之 靜電噴霧裝置。 [用以解決課題之手段] 爲了解決前述課題，本發明之靜電噴霧裝置，具備： 將液體做成微小的液滴並加以擴大噴霧的噴霧噴嘴；支承 該噴霧噴嘴之噴嘴管；接近配置於前述液滴的擴大範圍的 外側，對前述液滴賦予電荷之電極；覆蓋前述噴霧噴嘴及 前述噴嘴管的周圍，並保持前述電極之具有電氣絕緣性的 -6- 200819207 (4) 噴嘴蓋；及將朝噴霧方向和反噴霧方向雙方開口的環狀間 隙，在前述噴嘴蓋內，區劃於前述噴嘴管的周圍之具有電 氣絕緣性的噴嘴管蓋， 在前述噴嘴蓋，於前述噴嘴管蓋的外周面之外側位置 ，設有用來以因由前述噴霧噴嘴所噴出的液體所產生的負 壓吸入外部空氣的吸氣口（發明1 )。 若根據本發明的話，藉由一邊對前述電極施壓高電壓 ，一邊由前述噴霧噴嘴噴出液體，對噴霧液滴賦予電荷。 因從前述噴霧噴嘴之液體噴射，在前述噴嘴蓋內產生負壓 ，所以，由前述吸氣口將外氣吸入至前述噴嘴蓋內。所吸 入的空氣伴隨來自於前述噴霧噴嘴之噴霧，朝噴霧方向釋 出。即，伴隨來自於前述噴霧噴嘴的噴霧，在前述噴嘴蓋 內，產生朝噴霧方向之氣流。因此，噴霧液滴不易附著於 前述噴嘴管的外周面，亦可抑制噴霧液滴進入至前述環狀 間隙內。 在本發明，因前述噴嘴管蓋配設於前述噴嘴管周圍， 所以，噴霧液滴不易附著於前述噴嘴管周圍。並且，因在 前述噴嘴蓋內，連續地形成朝向噴霧方向之氣流，所以， 能夠阻止噴霧液滴朝反噴霧方向侵入。因此，可確實地防 止因噴霧液滴的連續膜所引起的短路或因漏電等所引起之 電壓下降。 又，若根據本發明的話，因前述環狀間隙朝噴霧方向 及反噴霧方向雙方開口，所以，洗淨水不會殘留於前述環 狀間隙內，可容易且確實地洗淨前述環狀間隙內。 200819207 (5) 作爲理想的一實施形態，亦可做成，前述噴嘴管蓋對 前述噴嘴蓋可自由裝卸（發明2)。藉此，因能夠取下前 述噴嘴管蓋，洗淨該噴嘴管蓋及前述噴嘴管的外周面，所 以，可更容易且更確實地進行洗淨作業。 特別是作成前述噴嘴管蓋對前述噴嘴蓋壓入形態的話 (發明3)，對進行前述噴嘴管蓋的裝卸作業不需要工具 等，能以單觸控來進行裝卸作業，更加理想。 作爲其他一實施形態，前述噴嘴管蓋具備··在前述噴 嘴蓋內，呈同心狀地配設於前述噴嘴管的周圍之外筒體； 在該外筒體內，呈同心狀地配設於前述噴嘴管的周圍之內 筒體；形成於前述外筒體與前述內筒體之間，構成前述環 狀間隙之外側環狀間隙；形成於前述內筒體與前述噴嘴管 之間，構成前述環狀間隙之內側環狀間隙；及在反噴霧方 向的靠近端部之位置，將前述外筒體與前述內筒體相互地 連結之內筒體支承件（發明4 )。 在此實施形態，前述噴嘴管蓋至少以雙重的筒體（外 筒體及內筒體）所形成。藉由這內外筒體，形成前述外側 環狀間隙與前述內側環狀間隙，噴霧液滴均不易進入到這 些任一環狀間隙內。又，即使在進行長時間的噴霧，造成 噴霧液滴侵入至前述各環狀間隙內，也因前述噴嘴管蓋的 表面積大，由前述噴霧噴嘴至前述電極的沿面距離大，所 以，在前述噴霧噴嘴與前述電極受到噴霧液滴的連續膜所 電氣相連上，需要長時間。因此，不易產生噴霧作業被迫 中斷之事態。 -8- 200819207 (6) 作爲一理想實施形態，在前述噴嘴蓋的外周 複數個鍔部’其擴大朝反噴霧方向的沿面距離並 述外周面上之前述液滴的連續膜擴大（發明5 ) 前述複數個鍔部是形成，伴隨著接近噴霧方 部的外徑逐漸變大爲佳（發明6 )。藉此，藉由 於前述噴霧噴嘴的液體噴霧產生於前述噴嘴蓋的 噴霧方向的氣流，使得附著於前述鍔部之噴霧液 離。 作爲一理想實施形態，具備支承前述噴嘴管 ，前述噴嘴蓋對前述基座部可自由裝卸（發明7 ，前述噴嘴管及前述噴嘴蓋的清掃可變得更容易 作成能以單觸控加以自由裝卸的話，更爲理想。 其次，本發明之噴嘴管蓋，是對具有噴霧噴 管、電極、及噴嘴蓋之靜電噴霧裝置的前述噴嘴 由裝卸並具有電氣絕緣性之噴嘴管蓋，該噴霧噴 體作成微小的液滴並加以擴大噴霧；該噴嘴管是 該噴霧噴嘴；該電極是接近配置於前述液滴的擴 外側，對前述液滴賦予電荷；該噴嘴蓋是用來覆 霧噴嘴及前述噴嘴管的周圍，並且用來保持前述 有電氣絕緣性，並具有用來以藉由從前述噴霧噴 進行噴霧所產生的負壓吸入外部空氣之吸氣口， 安裝於前述噴嘴蓋，使得在安裝至前述噴嘴 下，將朝噴霧方向及反噴霧方向雙方開口的環狀 面，具備 且抑制前 〇 向，各鳄 伴隨來自 周圍之朝 滴容易剝 的基座部 )。藉此 。特別是 嘴、噴嘴 蓋，可自 嘴是將液 用來支承 大範圍的 蓋前述噴 電極，具 嘴將液體 其特徵爲 蓋之狀態 間隙區劃 -9- 200819207 (7) 於前述噴嘴管的周圍，且外周面與前述吸氣口相對面（發 明8 )。 作爲理想的一實施形態，具備：在安裝至前述噴嘴蓋 之安裝狀態，呈同心狀地位於前述噴嘴管的周圍之外筒體 ;在該外筒體內，呈同心狀地位於前述噴嘴管的周圍之內 筒體；形成於前述外筒體與前述內筒體之間，構成前述環 狀間隙之外側環狀間隙；形成於前述內筒體與前述噴嘴管 之間，構成前述環狀間隙之內側環狀間隙；及在反噴霧方 向之靠近端部的位置，將前述外筒體與前述內筒體相互地 連結之內筒體支承件（發明9 )。 本發明的其他實施形態之靜電噴霧裝置，前述噴霧噴 嘴被支承於噴霧竿的前部，前述噴霧竿是具備區劃朝前後 雙方開口的環狀間隙之外筒部（發明1 〇 )。 若根據此實施形態的話，因噴霧液滴不易進入至前述 環狀間隙內，所以，形成附著於前述噴霧竿的噴霧液滴之 連續膜在前述環狀間隙斷開。藉此，能夠防止，被施加於 前述電極的高電位透過具有導電性的前述連續膜傳達至較 前述環狀間隙更後方，因而可防止漏電、短路、感電等。 並且’因前述環狀間隙朝前後雙方開口，所以，不會 有供給至該環狀間隙內之洗淨水殘留於其內部的情事產生 。因此’即使噴霧液滴進入至前述環狀間隙，也能夠容易 且確實地清掃其內部。又，當在洗淨作業後將前述靜電噴 霧部朝上立掛前述噴霧竿時，也能夠防止沿著該噴霧竿流 動之液滴聚集到前述環狀間隙。且，即使在噴霧作業中， -10- 200819207 (8) 因水覆蓋噴霧竿等的意外理由，液滴由前述噴霧竿的前方 沿著該噴霧竿的表面流下滴落之情況，也因該液滴會通過 前述環狀間隙，所以，若作業者握持前述外筒部的話，不 會有感電等的問題產生。 作爲理想的一實施形態，在前述外筒部的前部’具備 至少兩連之鍔部（發明11)。在此情況，因前述外筒部 的前部之表面積會增大設置前述至少兩連的鍔部之量，所 以，噴霧液滴附著至前述外筒部的前部表面上會花費時間 。因此，不易產生噴霧液滴的連續膜，很理想。並且，朝 前述噴霧竿的長度方向而通過前述至少兩連的鍔部之氣流 ，可發揮將液滴由鍔部剝離之作用。因此，即使噴霧液滴 附著於前述至少兩連的鍔部，該噴霧液滴的連續膜也會被 斷開極爲理想。 作爲理想的一實施形態，前述外筒部具備：爲了提高 前述噴霧竿的支承強度，而延伸於該噴霧竿的長度方向之 肋部（發明12)。藉此，即使在作業者握持前述外筒部 ，以支承前述噴霧竿之情況，在強度上也不會有任何問題 〇 作爲理想的一實施形態’則述噴霧竿是在較前述外筒 部更後方的位置具備有鍔部（發明1 3 )。藉此，即使液 滴流下於前述環狀間隙間，也能夠防止其朝較前述鍔部更 後方流下，所以，極爲理想。 【實施方式】 -11 - 200819207 (9) 以下，參照圖面，說明關於本發明的實施形態。 圖1是本發明的一實施形態之靜電噴霧裝置的部分切 削側面圖。圖2是圖1的靜電噴霧部之放大側面圖。圖3 是圖2的靜電噴霧部之上面圖。圖4是圖3的IV-IV箭號 視角斷面圖。圖5是圖4的V-V箭號視角斷面圖。圖6 是本發明的其他實施形態之靜電噴霧裝置的靜電噴霧部之 與圖4對應的斷面圖。圖7是圖1的前握把之斜視圖。圖 8是圖1的前握把之斷面圖。圖9是圖的IX-IX箭號視角 斷面圖。 本發明之靜電噴霧裝置，是用來使導電性液體的微小 噴霧液滴帶電，有效率地附著於對象物之裝置，例如可理 想地適用於對農作物噴灑農藥或肥料之裝置。在圖丨，作 爲本發明的一實施形態，顯示具備手持式噴霧竿之靜電噴 霧裝置，但此僅爲舉例說明，沿著長條的弔桿具備多數個 靜電噴霧部之行走式噴桿噴霧器亦可適用本發明。 如圖1所示，本發明的一實施形態之靜電噴霧裝置i ’具有手持式噴霧竿4，該噴霧竿在前部具有靜電噴霧部 2 ’在後部具有操作部3。前述操作部3是具備：散佈旋 塞5、電源開關6、及適合作業者以單手握持之形狀的後 握把7。在該後握把7內，作爲電源之蓄電池8可更換地 被收納著。 前述靜電噴霧部2是具備：可將液體做成微小的液滴 並加以擴大噴霧之噴霧噴嘴9 ;接近配置於前述液體的擴 大範圍的外側’ W則述液滴賦予電荷之電極1 0 ;及覆蓋 •12- 200819207 (10) 前述噴霧噴嘴9的周圍，並保持前述電極10之噴嘴棻l9 。前述電極1 〇是在本實施形態，做成環狀電極’呈同心 地配置於前述噴霧噴嘴9的噴霧方向之前方。噴_液槽 11內的液體是藉由泵浦12，壓送至前述噴霧噴嘴9。同 時由前述蓄電池8朝前述電極1 0，供給進行靜電賦予所 必要之電力。由前述噴霧噴嘴9所噴出之液滴S是〜邊擴 大，一邊通過前述環狀電極1〇內的空間，釋放至大氣中 。對前述噴霧液滴s，在通過前述環狀電極1〇內之際， 藉由該環狀電極10賦予電荷。因此，可提升前述噴霧、液 滴s對具有反極性的對象物之附著性。 在本貫施形悲’爲了提昇女全性且抑制送電時的電 損失，在前述環狀電極1 〇的附近配設著升壓器1 3。該升 壓器1 3是將由前述蓄電池8以6 V左右的低電壓所供給 之電力的電壓升壓至例如4 · 5 kV左右，再供給至前述環狀 電極1 0。 前述噴霧竿4，具備具有良好的耐藥品性之塑膠至等 的細長竿管1 4作爲竿體。在該竿管1 4的前端部1 4f，支 承著前述靜電噴霧部2的基座部20，在前述竿管14的後 端部14 r，支持著前述操作部3。在前述竿管1 4內，收納 有將電力供給至前述升壓器1 3的電氣配線1 5、及將噴霧 液供給至前述噴霧噴嘴9之送液配管1 6。 又，在前述竿管14，於前述前端部14f與前述後端 部1 4r之間的適當位置，安裝有前握把1 7。在該前握把 17的後方，安裝有用來連結未圖示的掛肩繩之吊環is。 -13- 200819207 (11) 作業者能以前述掛肩繩將前述噴霧竿4垂吊支承’握持前 述前握把17與前述後握把7，進行噴霧作業。 如圖4所示，在前述靜電噴霧部2的前述基座部20 ，支承著朝噴霧方向延伸的噴嘴管21，在該噴嘴管21的 ' 前端部，同心地支承著前述噴霧噴嘴9。該噴霧噴嘴9經 由前述噴嘴管21，來與前述送液配管16(參照圖1)連 通。 前述噴嘴蓋19是對前述基座部20，可自由裝卸地連 結著。自由裝卸的連結形態，亦可爲螺絲結合式，亦可爲 壓入式，但能以單觸控進行裝卸的形態爲佳。在圖4所示 的例子，於前述噴嘴蓋19的基部19r的中央，設有筒狀 孔22，將前述噴嘴管21的基部之筒狀部23壓入至此筒 狀孔2 2。在前述噴嘴蓋1 9與前述基座部2 0之間，設有 適宜形狀的脫落防止用鎖定機構。前述筒狀孔2 2與前述 筒狀部2 3之間是以密封環2 4密封著。又，在前述噴嘴蓋 19與前述基座部20之間，亦介裝有密封材25。前述噴嘴 蓋1 9與基座部20均以塑膠等具有電氣絕緣性之材料所形 成的。 前述噴嘴蓋19具備：朝噴霧方向開口的杯狀蓋本體 26 ;及可自由取下地結合於該蓋本體26的前部之開口部 27的蓋28。前述蓋本體26是於反噴霧方向側的端部2“ 具備前述筒狀孔22。 則述蓋本體26是覆蓋前述噴霧噴嘴9及前述噴嘴管 21的周圍，可發揮，防止由前述噴霧噴嘴9朝前述噴嘴 -14- 200819207 (12) 蓋1 9的外部所釋放的噴霧液滴S附著於前述噴霧噴嘴9 及前述噴嘴管21的周面之作用（噴霧液滴遮斷作用）。 又，前述蓋28可發揮，在與前述蓋本體26之間保持 前述環狀電極10之作用。該環狀電極1〇是被挾持於前述 蓋本體26與前述蓋28之間，與這些構件呈同心狀地被保 持著。由被收容於前述基座部20內的前述升壓器13延伸 之高電壓電纜29被插通於形成在前述蓋本體26的電纜插 通孔3 0，與前述環狀電極1 0電性連接。 在前述蓋本體26的周面形成有，藉由因從前述噴霧 噴嘴9將液體進行噴霧所產生之負壓，吸入外部的空氣用 之吸氣口 3 1。設置該吸氣口 3 1的理由如下。 如前述，前述蓋本體26是可發揮，防止由前述噴霧 噴嘴9朝前述噴嘴蓋1 9的外部所釋放的噴霧液滴S附著 於前述噴霧噴嘴9及前述噴嘴管21的周面之作用。由此 觀點來看，在前述蓋本體26設置孔（前述吸氣口 3 1 )的 做法有矛盾之處。但，在前述蓋本體26的周面未設置前 述吸氣口 3 1之情況時，由前述噴霧噴嘴9所噴出之液滴 S會因前述負壓，在前述環狀電極1〇內朝反噴霧方向被 吸引，而侵入至前述蓋本體26內。相對於此，若在前述 蓋本體2 6的周面設置前述吸氣口 3 1的話，伴隨著來自於 前述噴霧噴嘴9的液體噴霧，由前述吸氣口 31朝噴霧方 向流動的空氣之連續氣流A會形成於前述蓋本體26內， 因此噴霧液滴S不易進入到該蓋本體26內。 前述吸氣口 3 1的數量、形狀、大小及配設位置，由 -15- 200819207 (13) 空氣的取入性、與前述蓋本體2 6之噴霧液滴遮斷性等的 均衡來看，設置於符合下述要件的範圍爲佳。 首先，前述吸氣口 3 1的總面積作成對前述蓋本體2 6 的周面之總面積，不會超過其1 /2的範圍爲佳。藉此，不 會大幅度地損害前述蓋本體26之噴霧液滴遮斷性’可有 效地利用前述負壓，能夠確保進行噴霧液滴S的附著抑制 或液滴剝離所必要之通氣量。 又，前述吸氣口 31是開口於由較前述噴霧噴嘴9更 後方的位置至較前述噴霧噴嘴9更前方的位置爲佳。藉此 ，可在前述蓋本體26內確實地形成由前述噴霧噴嘴9的 後方朝前方之空氣的連續氣流A。在本實施形態，如圖2 及圖3所示，僅殘留少量的前述蓋本體2 6的前部與後部 ’在該蓋本體26的幾乎全長範圍上，形成細長的前述各 吸氣口 3 1。 且，前述吸氣口 31是在前述蓋本體26的周方向，隔 著間隔形成複數個爲佳。藉此，能夠在前述噴嘴蓋1 9內 ，將氣簾狀的前述連續氣流A更確實地形成於前述噴霧 噴嘴9的全周範圍。並且，即使在安裝著前述蓋28之狀 態下，由前述吸氣口 31插入未圖示的棒狀清掃具，容易 進行前述蓋本體26的內周面或前述噴霧噴嘴9的外周面 之清掃。在本實施形態，由圖2及圖3可得知，以等角度 間隔，將4個前述吸氣口 3 1形成於前述蓋本體2 6的周面 〇 如圖4所示，在前述噴嘴蓋1 9內，配設有筒狀的噴 -16- 200819207 (14) 嘴管蓋32。該噴嘴管蓋32是在前述噴嘴蓋19內覆蓋著 前述噴嘴管21的周圍，防止噴霧液滴S附著至該噴嘴管 21的外周面。前述噴嘴管蓋32是以塑膠等具有電氣絕緣 性之材料所形成的。前述噴嘴管蓋3 2是與本發明的一實 施形態之靜電噴霧裝置1的構成要件一同爲本發明的一實 施形態之噴嘴管蓋本身。 前述噴嘴管蓋32作成，對前述蓋本體26可自由裝卸 。因此，容易由前述蓋本體26取下前述噴嘴管蓋32，洗 淨前述噴嘴管蓋32本身及前述噴嘴管21的外周面。因此 ，能夠更進一步容易且確實地進行洗淨作業。裝卸自由的 結合形態，做成壓入式爲佳。這是由於不需要進行前述噴 嘴管蓋3 2的裝卸之工具等，能夠單觸控容易進行裝卸作 業之故。 在本實施形態，在前述噴嘴管蓋3 2的反噴霧方向側 之靠近端部的外周面，一體形成有壓入用突緣33，在前 述蓋本體26，設有：承接前述壓入用突緣33，限制前述 噴嘴管蓋3 2的壓入深度之階差部3 4。在將前述噴嘴管蓋 3 2對前述蓋本體26壓入至正規位置之狀態，前述噴嘴管 蓋32的外周面是與則述吸氣口 31相對面。前述噴嘴管蓋 32是在將前述蓋28由前述蓋本體26取下之狀態下，容 易由前述蓋本體26的前述開口部27抽取出來。 前述噴嘴管蓋32是將朝噴霧方向及反噴霧方向雙方 開口的環狀間隙（外側環狀間隙3 6、內側環狀間隙3 5 ) 區劃於前述噴嘴管21的周圍。在圖4的例子，前述噴嘴 -17- 200819207 (15) 管蓋3 2具備：在前述噴嘴蓋丨9內，呈同心狀地配設於前 述噴嘴管21的周圍之外筒體37;及在該外筒體37內， 呈同心狀地配設於前述噴嘴管2 1的周圍之內筒體3 8。在 前述外筒體3 7與前述內筒體3 8之間區劃有前述外側環狀 間隙3 6，在前述內筒體3 8與前述噴嘴管21之間區劃有 前述內側環狀間隙3 5。 前述外筒體37與前述內筒體38，在這些的反噴霧方 向側之靠近端部的位置，藉由內筒體支承件3 9相互地連 結著。將該內筒體支承件3 9設置於前述各筒體3 7、3 8的 反噴霧方向側之靠近端部的位置，是由於藉由遠離前述噴 霧噴嘴9及前述環狀電極10，可極力地延緩前述內筒體 支承件3 9助長噴霧液滴S的連續膜成長的時間之故。 前述內筒體支承件3 9是如圖5所示，在前述外筒體 3 7與前述內筒體3 8的周方向，隔著間隔形成複數個（在 圖5的例子爲4個）。藉此，可確保前述外側環狀間隙 36朝噴霧方向及反噴霧方向雙方開口之狀態。在前述外 筒體37，形成有前述壓入用突緣33。 在前述結構，當由噴霧噴嘴9噴射液體時’受到噴霧 • 液的流動所拉引，在前述噴嘴蓋1 9內產生負壓，因此， 由前述吸氣口 3 1朝前述噴嘴蓋1 9內，吸入外部的空氣。 被吸入至前述噴嘴蓋19內的空氣是沿著前述噴嘴管蓋32 的外周面及前述噴霧噴嘴9的外周面，朝噴霧方向流動， 通過前述環狀電極10內，與前述噴霧液滴s 一同成爲連 續氣流A，朝前方被釋出。因此，可防止前述噴霧液滴s -18 - (16) (16)200819207 附著於前述蓋本體26的內面、前述噴霧噴嘴9的外周面 及前述噴嘴管蓋3 2的外周面，即使該噴霧液滴S附著’ 因在蓄積前也會受到前述連繪氣流A所剝離’所以’不 會成長成大的液滴。因此，不易在前述噴嘴蓋1 9內形成 前述噴霧液滴S的連續膜，能夠防止因短路或漏電所引起 之電壓下降。 又，在本實施形態，因在前述噴嘴管2 1的周圍配設 有前述噴嘴管蓋3 2，所以，即使前述噴霧液滴S進入前 述噴嘴蓋19內，也不易附著於前述噴嘴管21的周圍。因 此，不易引起因前述噴霧液滴S的附著所導致的短路或漏 電等所造成之電壓下降。又，因前述外側環狀間隙3 6及 前述內側環狀間隙3 5形成窄，所以噴霧液滴S也不易侵 入至這些間隙3 5、3 6內。特別是在圖4的例子，前述內 筒體38由前述外筒體37朝噴霧方向稍許延伸出來，在前 述內筒體3 8的噴霧方向側的端部，形成縮小與前述噴霧 噴嘴9的向內突緣4 0，因此，可極力地縮小噴霧液滴S 侵入至前述內側環狀間隙3 5內的可能性。 且，因在前述噴嘴管2 1的外周面，形成有使其長度 方向的沿面距離擴大之複數個鍔部4 1，所以，即使在噴 霧液滴S侵入至前述內側環狀間隙3 5內之情況，附著於 前述噴嘴管2 1的外周面之噴霧液滴S的連續膜也需要長 時間才可成長至前述噴嘴管21的基部側。因此，不易產 生因前述噴霧液滴S的連續膜所引起之短路或漏電，可進 一步抑制電壓下降之可能性。 -19- (17) (17)200819207 又，在圖4的例子，前述噴嘴管蓋32是以內外雙重 的筒體3 8、3 7所形成，其表面積大。因此，即使進行長 時間噴霧，使得噴霧液滴S進入至前述各環狀間隙3 5、 36內，也因由前述噴霧噴嘴9至前述環狀電極1〇爲止的 沿面距離大，所以，前述噴霧噴嘴9與前述環狀電極i 〇 受到噴霧液滴S的連續膜所電性連接上，需要更長的時間 。因此，更不易引起因短路或漏電所導致之電壓下降。 且，前述外側環狀間隙3 6及前述內側環狀間隙3 5朝 噴霧方向及反噴霧方向雙方開口，所以，即使在噴霧液滴 S進入至前述各環狀間隙3 6、3 5內，也能以洗淨水容易 _行洗淨。且洗淨水也不會殘留於前述各環狀間隙3 6、 35。前述洗淨作業可在將前述噴嘴管蓋32安裝於前述蓋 本體26內之狀態下進行，亦可取下該噴嘴管蓋3 2來進行 〇 如以上所述’在本實施形態，著重於抑制噴霧液滴S _著至前述噴嘴蓋1 9內及該附著液滴的成長之措施，所 以進行靜電賦予所必要之高電壓漏失的可能性極低。 作爲本實施形態的其他特徵，如圖2及圖3所示，在 前述噴嘴蓋19前述蓋本體26)的外周面形成有複數個鍔 部4 2。該複數個鍔部4 2可發揮下述作用，即，可擴大前 述噴嘴蓋1 9的外周面之朝反噴霧方向的沿面距離，並且 对抑制前述噴嘴蓋1 9的外周面之噴霧液滴S的連續膜之 擴大。 前述複數個鍔部42是形成，伴隨著接近噴霧方向， -20- 200819207 (18) 各鍔部42的外徑逐漸變大爲佳。藉此，藉由伴隨 前述噴霧噴嘴9的液體噴霧產生於前述噴嘴蓋19 之朝噴霧方向的氣流，使得附著於前述鍔部42之 滴容易剝離。前述複數個鍔部4 2中，配設於最接 蓋28的位置之鍔部42的外徑是與前述蓋28的外 相同。 作爲前述噴嘴管蓋3 2的其他實施形態，亦可 所示，作成具備單一筒體的結構。圖6的噴嘴管蓋 備與前述內筒體38相同的筒體44，在該筒體44 霧方向側之靠近端部的外周面，形成有可發揮與前 用突緣33相同功能的壓入用突緣45。在前述筒體 噴嘴管2 1之間，形成與前述內側環狀間隙3 5相同 間隙4 6。在圖6之其他結構，與圖4相同，所以 予相同的符號並省略其說明。 如圖8所示’前述第2真空容器4具備區劃朝 向開口的環狀間隙5 0之外筒部5 1。在本奮施形態 前述則握把1 7具備前述外筒部5 1。但不限於此， 爲與前述前握把17無關連構件，來配設前述外筒音丨 前述前握把1 7是具備：前述外筒部5 i ;同心 於該外筒部51內的內筒部5 2 ;及配設於前述外存 與內筒部52之間的肋部53。此肋部53 ,亦作爲在 筒部51的內周面54與前述內筒部52的外周面55 成空間部的間隔件來發揮功能。前述前握把i 7是 耐藥品性及電氣絕緣性的塑膠等材料所形成的。 來自於 的周圍 噴霧液 近前述 徑大致 如圖6 43具 的反噴 述壓入 44與 之環狀 對其賦 前後方 ，做成 亦可作 ;5 1 〇 地配置 ί部5 1 前述外 之間形 以具有 •21 - 200819207 (19) 前述內筒部52在其全長範圍具有相同的內徑’其內 徑尺寸作成可與前述竿管14的外周面嵌合之尺寸。前述 內筒部52的前端面52f位於較前述外筒部51的前端面 5 If更後方的位置。同樣地，前述內筒部52的後端面52r 也未於較前述外筒部5 1的後端面5 1 r更後方的位置。 前述外筒部5 1具有較前述內筒部52的外徑更大的內 徑。前述肋部5 3或間隔件在半徑方向連結前述外筒部5 1 的前述內周面54與前述內筒部52的前述外周面55’且 由前述內筒部52的前述前端面52f至前述外筒部51的前 述後端面51r爲止，延伸於前述前握把17 (前述噴霧竿4 )的長度方向。 複數個前述肋部5 3是以等角度間隔設置於前述內筒 部5 2的周圍。在本實施形態，如圖9所示，設有4個前 述肋部5 3。前述肋部5 3是強固地連結前述內筒部5 2與 前述外筒部5 1，可保證，作業者握持前述前握把1 7支承 前述噴霧竿4的情況實之支承強度。藉由設置前述肋部 53，在前述外筒部51的前述內周面54與前述內筒部52 的前述外周面5 5之間，區劃形成有延伸於前述噴霧竿4 的長度方向之複數個中空部Η。這些複數個中空部Η朝前 述噴霧千4的後方開放。 在前述內筒部52，由前述外筒部51朝後方延伸的延 伸部56成爲用來將前述前握把17固定於前述竿管14之 固定部。即，如圖7所示，在前述延伸部5 6，形成有延 伸於前述內筒部5 2的長度方向之複數個細縫5 7。作爲繋 -22- 200819207 (20) 緊固定具，使用將成爲一對的兩個半環體5 8、5 8所組 構成之環狀扣件5 9。此環狀扣件5 9也以具有耐藥品性 電氣絕緣性的塑膠等之材料所形成的。以前述一對半環 5 8、5 8包圍前述延伸部5 6的外周面，以自攻螺絲將前 一對半環體58、58結合成環狀。藉此，前述延伸部56 將其內徑縮小的方向被繋緊，使前述前握把1 7穩固地 定於前述竿管1 4。 前述環狀扣件59是在握把固定狀態，在較前述外 部5 1更後方的位置，於前述內筒部52上形成鍔部。在 實施形態，前述環狀扣件59兼作前述鍔部。 再者，如圖8所示，前述延伸部56的長度方向之 述環狀扣件5 9的安裝位置是作成，在前述外筒部5 1的 述後端面51r與前述環狀扣件59之間具有間隙的位置 這是由於預先將前述外筒部5 1與前述內筒部52之間的 述複數個中空部Η朝前述噴霧竿4的後方開方之故。 ，在前述延伸部5 6的後端部，設有用來防止前述環狀 件5 9脫落之凸部6 1。 一樣如圖8所示，在前述內筒部52的前方，藉由 述外筒部51的前側內周面54f與前述竿管14的外周面 成前述環狀間隙5 0。此環狀間隙5 0是朝前述前握把 的前後雙方開口。在本實施形態，前述環狀間隙5 0是 由受到前述肋部5 3所區劃的前述複數個中空部Η，朝 述前握把17的後方開口。 前述環狀間隙5 0是可發揮，阻止在前述竿管1 4與 合 及 體 述 朝 固 筒 本 前 刖 Ο 前 又 扣 刖 形 17 經 、少· 刖 刖 -23- 200819207 (21) 述前握把1 7之間產生噴霧液滴的連續膜之作用。即，由 前述靜電噴霧部2所放出之微小噴霧液滴S會浮游在大氣 中’亦會附著至前述竿管1 4的外表面。當長時間連續進 行噴霧作業時，則所附著的噴霧液滴雖不會如流動般所成 長’但，噴霧液滴的附著區域會朝前述噴霧竿4的後方擴 大’最終液滴會附著至前述前握把1 7 (前述外筒部5 1 ) 的外表面。當前述竿管1 4的外表面之噴霧液滴的膜與前 述外筒部5 1的外表面之噴霧液滴的膜相連時，則在握持 前述前握把17的作業者的手，會有產生高電壓洩失或引 起感電之危險。但，在本實施形態，由於在前述竿管1 4 與前述外筒部5 1之間設有前述環狀間隙5 0，噴霧液滴不 易進入至該環狀間隙5 0內，故，能夠防止前述竿管1 4的 外表面之噴霧液滴的膜與前述前握把17的外表面之噴霧 液滴的膜相連，因此不會產生上述問題。 在本實施形態，因前述環狀間隙5 0朝前述前握把1 7 的前後雙方開口，所以，即使噴霧液滴進入至前述環狀間 隙5 0內，也能以洗淨水，容易且確實地清掃前述前握把 1 7的內部。又，當在洗淨作業後將前述靜電噴霧部2朝 上立掛前述噴霧竿4時’也能夠防止沿著該竿管1 4流動 之液滴聚集到前述環狀間隙5 0。且，即使在噴霧作業中 ，因水覆蓋噴霧竿4等的意外理由，液滴由前述噴霧竿4 的前方沿著該竿管1 4的表面流下滴落之情況，也因該液 滴會通過前述環狀間隙5 0及前述複數個中空部Η，所以 ，若作業者握持前述前握把的話，也不會有感電等的 -24- 200819207 (22) 問題產生。 又，在本實施形態，在較前述前握把1 7的前述外筒 部51更後方的位置，配設有作爲鍔部之前述環狀扣件5 9 。因此，即使流下於前述竿管1 4的表面之液滴通過前述 環狀間隙5 0及前述複數個中空部Η ’可能夠阻止其朝前 述環狀扣件5 9更後方流下’極爲理想。 在本實施形態，藉由前述外筒部5 1的前述前側內周 面5 4 f與前述竿管1 4的外周面區劃成前述環狀間隙5 0， 但不限於此，亦可如圖8所示，使前述內筒部5 2的前述 前端部52f延伸至前述外筒部51的前述前端面51f爲止 ，藉由前述外筒部51的前側內周面54f與內筒部52的前 方延長部來區劃前述環狀間隙5 0。至少，前述外筒部5 1 的前側內周面54f與前述環狀間隙50的區劃有關的話即 可 。 又，作爲其他實施形態，亦可做成下述結構，即，省 略前述內筒部52，使前述肋部53與前述竿管14的外表 面接觸。 再者，前述前握把1 7的長度方向之前述環狀間隙5 0 的形成範圍與前述肋部5 3的形成範圍之比率是考量利用 前述環狀間隙5 0之噴霧液滴的連續膜之遮斷效果、與利 用前述肋部5 3之前述前握把1 7的強度提昇效果，來適當 地決定。 爲了簡單化，在本實施形態，於前述外筒部5 1的表 面，亦可與其他這種握把相同，形成配合手指的形狀之凹 -25- 200819207 (23) 凸，或實施止滑加工。 如圖8所示，前述前握把1 7是於前述外筒部5 1的前 部之外周，具備至少兩連（在圖式例爲3連）之鍔部62 。在此情況，前述外筒部5 1的前部之表面積會增大設置 前述至少兩連的鍔部62之量，所以噴霧液滴附著至前述 外筒部5 1的前部表面上需要花費時間。因此，在前述前 握把17不易形成噴霧液滴之連續膜。並且，朝前述噴霧 竿4的長度方向以越過前述至少兩連的鍔部62之方式通 過的氣流，可發揮使液滴由鍔部6 2剝離之作用。因此， 即使噴霧液滴附著於前述至少兩連的鍔部62，該噴霧液 滴之連續膜也會被斷開極爲理想。 前述至少兩連的鍔部62，亦可爲與前述外筒部5 1預 先一體成形者，亦可爲將具有耐藥品性及電氣絕緣性的塑 膠等之材料所形成之與前述外筒部5 1不同之固裝於其外 周者。 在前述前握把17的前方，在與前述外筒部51的前述 前端面5 1 f之間，隔著間隔Cf，配設著鍔部63。此鍔部 6 3也以具有耐藥品性及電氣絕緣性的塑膠等之材料所形 成。目丨j述鳄部6 3在目丨j述刖握把1 7的前方，增大前述噴霧 竿4的表面積，延遲噴霧液滴的膜之形成。又，藉由設置 前述鍔部6 3，使得噴霧液滴變得不易進入至前述環狀間 隙5 0內。前述鍔部63也至少形成2連爲佳，藉此可延遲 液滴的膜之形成並達到液滴剝離效果。又，前述鍔部63 可預先與前述竿管14 一體成形，亦可將與該竿管丨4不同 -26- 200819207 (24) 體形成者固裝於其外周之鍔部。 【圖式簡單說明】 圖1是本發明的一實施形態之靜電噴霧裝置的部分切 削側面圖。 圖2是圖1的靜電噴霧部之放大側面圖。 圖3是圖2的靜電噴霧部之上面圖。 圖4是圖3的IV-IV箭號視角斷面圖。 圖5是圖4的V-V箭號視角斷面圖。 圖6是本發明的其他實施形態之靜電噴霧裝置的靜電 噴霧部之與圖4對應的斷面圖。 圖7是圖1的前握把之斜視圖。 圖8是圖1的前握把之斷面圖。 圖9是圖8的IX-IX箭號視角斷面圖。 【主要元件符號說明】 A :連續氣流 Cr :間隙 Η :中空部 S :噴霧液滴 1 :靜電噴霧裝置 2 :靜電噴霧部 3 :操作部 4 :噴霧竿 -27- (25) (25)200819207 5 :散佈旋塞 6 :電源開關 7 :後握把 8 :蓄電池 9 :噴霧噴嘴 10:(環狀）電極 1 1 :噴霧液槽 1 2 :泵浦 13 :升壓器 1 4 :竿管 14f :前端部 14r :後端部 1 5 :電氣配線 1 6 :送液配管 1 7 :前握把 1 8 :吊環 1 9 :噴嘴蓋 2 0 :基座部 21 :噴嘴管 22 :筒狀孔 2 3 :筒狀部 24 :密封環 2 5 :密封材 26 :蓋本體 -28- (26) (26)200819207 27 :開口部 28 :蓋 2 9 :高電壓電纜 3 0 :電纜插通孔 3 1 :吸氣口 3 2 :噴嘴管蓋 3 3 :壓入用突緣 3 5 :內側環狀間隙 3 6 :外側環狀間隙 3 7 :外筒體 3 8 :內筒體 3 9 :內筒體支承件 4 0 :加壓構件 4 1,4 2,6 2，6 3 :鍔部 43 :噴嘴管蓋 44 :筒體 46 :環狀間隙 5 0 :環狀間隙 5 1 :外筒部 5 1 f :前端面 5 1 r :後端面 5 2 :內筒部 5 2 f :前端面 52r :後端面 -29 200819207 (27) 5 3 :肋部 54 :內周面 5 4 f :前側內周面 5 5 :外周面 5 6 :延伸部 5 7 :細縫 5 8 :半環體 5 9 :環狀扣件 6 0 :自攻螺絲 61 :凸部200819207 (1) IX. [Technical Field] The present invention relates to charging a spray droplet of a conductive liquid such as a pesticide, The spray droplets are efficiently attached to an electrostatic spray device for an object such as a crop. The present invention is also directed to an ideal nozzle tube cover for use as a constituent of the electrostatic spray device. [Prior Art] As a kind of electrostatic spray device, An electrostatic spray is provided on the front of the spray raft. An electrostatic spray device that performs an electrostatic spray operation by holding the rear end side of the spray hopper by hand or the like is well known. The electrostatic spray unit includes a spray nozzle that sprays a liquid such as a pesticide into a small number of minute droplets, and ejects it. And an electrode disposed outside the expanded range of the liquid, By applying a high voltage to the electrode, Charge is applied to the droplets ejected by the aforementioned spray nozzle. With this, It is desirable to enhance the adhesion of the aforementioned spray droplets to agricultural products having an opposite polarity. but, The aforementioned spray droplets are not only for agricultural products, It is also easy to adhere to the above-mentioned electrostatic spray portion or the aforementioned spray gun. This is a disadvantage of the aforementioned electrostatic spray device. which is, When the spray operation is continued, When the range of adhesion of the spray droplets to the electrostatic spray portion is increased, Will cause the voltage leakage to become larger, It becomes difficult to provide effective static electricity. also, In the aforementioned spray nozzle that becomes the ground potential portion, a state in which the electrode is electrically connected through a continuous film of the spray droplet formed on the surface of the electrostatic spray portion, Will become unable to carry out static electricity -4- 200819207 (2) Give. Similarly, a spray liquid film attached to the surface of the aforementioned spray bowl, This continuous film gradually extends toward the hand side of the aforementioned spray hand by hand holding. Since the aforementioned continuous film of the pesticide has conductivity~ When the continuous film reaches the operator's hand, It will pass through the operator who holds the front grip, Problems such as short circuit or electric induction. therefore, In the past, as in the case of the Japanese Patent Laid-Open No. 2005-324 1 8 1 (1), The proposal has one end side open and the other end side closed. It is disposed concentrically with the spray nozzle in the nozzle cover. also, The droplet does not easily enter the inside of the cylindrical portion, Therefore, the liquid film can be disconnected at the aforementioned cylindrical portion. Therefore, it is possible to prevent leakage from occurring, Japanese Patent Laid-Open No. 2006-2 1 1 48 (patent, The proposal has compressed air using a compressor. A technique for forcibly discharging the inside of the nozzle cover to the outside. And, Japanese Patent Laid-Open Publication No. 2005-193225 (patent, The proposal is in the middle of the length of the spray raft. A technique of providing an annular recess. As this annular recess, Describe the depth direction of the sprayer, Further, it is described that the annular recessed portion is provided on the end side before the spraying. With the aforementioned structure, Annular recess, The continuous film of spray droplets is surely broken. SUMMARY OF THE INVENTION In the aforementioned Patent Document 1, If you spray for a long time, It is therefore impossible to prevent the spray droplets from entering the aforementioned cylindrical portion. Because the drop became the operator of the company, Therefore, When the spray is reported (the patented tubular part is due to the continuous flow of the spray droplets) 2 spray droplets document 3) the grip extending over the entire circumference of the grip can be used in the above operation, Requires •5 - 200819207 (3) Regularly clean the inside of the cylindrical portion or the inner peripheral surface of the nozzle cover. but, Patent Document 1, Since the other end side of the cylindrical portion is closed, Therefore, it is not easy to remove the washing water. The deep part of the aforementioned cylindrical portion cannot be adequately cleaned. The aforementioned patent document 2, When spraying, Because of the need for a compressor and its drive source, and so, Labor and cost. In the aforementioned Patent Document 3, If the spraying operation is continued for a long time, Although the spray droplets will enter the aforementioned annular recess, but, Because the deep bottom of the aforementioned annular recess is closed, and so, The water used for washing is not easy to remove. It is not possible to adequately clean the deep bottom of the aforementioned annular recess. The present invention has been developed in view of the foregoing circumstances, Its purpose is to provide, It is not easy to cause a voltage drop caused by a short circuit or leakage between electrodes, And cheap and easy, The electrostatic spray device and the nozzle cap are cleaned reliably. also, Another object of the present invention is to provide a continuous film that effectively breaks the droplets of the spray, Further, an electrostatic spray device for cleaning the spray crucible is easily and surely performed. [Means for Solving the Problem] In order to solve the aforementioned problems, The electrostatic spray device of the present invention, have: a spray nozzle that makes a liquid droplets and expands the spray; a nozzle tube supporting the spray nozzle; Proximate to the outside of the expanded range of the aforementioned droplets, An electrode that imparts a charge to the aforementioned droplets; Covering the spray nozzle and the periphery of the nozzle tube, And maintaining the electrically insulating -6-200819207 (4) nozzle cover of the foregoing electrode; And an annular gap that opens to both the spray direction and the reverse spray direction, In the aforementioned nozzle cover, An electrically insulating nozzle cap that is zoned around the nozzle tube, In the aforementioned nozzle cover, At the outer side of the outer peripheral surface of the nozzle cap, An intake port for taking in outside air at a negative pressure generated by the liquid sprayed from the spray nozzle is provided (Invention 1). According to the present invention, By applying a high voltage to the electrodes, While ejecting the liquid from the aforementioned spray nozzle, A charge is applied to the spray droplets. Due to the liquid injection from the aforementioned spray nozzle, Producing a negative pressure in the aforementioned nozzle cover, and so, The outside air is sucked into the nozzle cover by the aforementioned intake port. The inhaled air is accompanied by a spray from the aforementioned spray nozzle. Release in the direction of the spray. which is, With the spray from the aforementioned spray nozzle, In the aforementioned nozzle cover, Produces a flow of gas in the direction of the spray. therefore, The spray droplets are less likely to adhere to the outer peripheral surface of the nozzle tube. It is also possible to suppress the droplets of the spray from entering the aforementioned annular gap. In the present invention, Since the nozzle cap is disposed around the nozzle tube, and so, The spray droplets are less likely to adhere to the periphery of the nozzle tube. and, Because in the aforementioned nozzle cover, Continuously forming a gas flow toward the spray direction, and so, It can prevent the spray droplets from invading in the direction of the reverse spray. therefore, It is possible to surely prevent a short circuit caused by a continuous film of spray droplets or a voltage drop caused by electric leakage or the like. also, According to the present invention, Because the annular gap is open to both the spray direction and the reverse spray direction, and so, The washing water does not remain in the aforementioned annular gap. The aforementioned annular gap can be easily and surely washed. 200819207 (5) As an ideal embodiment, Can also be made, The nozzle cap is detachably attached to the nozzle cap (Invention 2). With this, Because the nozzle cap can be removed, Washing the nozzle tube cover and the outer peripheral surface of the nozzle tube, and so, The cleaning operation can be performed more easily and more reliably. In particular, when the nozzle cap is pressed into the nozzle cap, the invention is invented (Invention 3). No tools are required for loading and unloading the nozzle cap, Can be loaded and unloaded with a single touch. More ideal. As another embodiment, The nozzle cap is provided in the nozzle cover. a cylindrical body disposed concentrically around the nozzle tube; In the outer cylinder, a cylindrical body disposed concentrically around the nozzle tube; Formed between the outer cylinder and the inner cylinder, Forming an annular gap outside the annular gap; Formed between the inner cylinder and the nozzle tube, Forming an inner annular gap of the aforementioned annular gap; And in the vicinity of the end of the counter-spray direction, An inner cylinder support member that connects the outer cylinder and the inner cylinder to each other (invention 4). In this embodiment, The nozzle tube cover is formed of at least a double cylinder (outer cylinder and inner cylinder). With this inner and outer cylinder, Forming the outer annular gap and the inner annular gap, It is not easy for the spray droplets to enter any of these annular gaps. also, Even after a long spray, Causing spray droplets to intrude into the aforementioned annular gaps, Also due to the large surface area of the nozzle cap described above, The creeping distance from the aforementioned spray nozzle to the aforementioned electrode is large, and so, The aforementioned spray nozzle is electrically connected to the continuous film of the aforementioned electrode which is subjected to spray droplets, It takes a long time. therefore, It is not easy to produce a situation in which the spray operation is forced to be interrupted. -8- 200819207 (6) As an ideal implementation, a plurality of crotch portions on the outer circumference of the nozzle cap, which expand the creeping distance in the reverse spray direction and the continuous film enlargement of the liquid droplets on the outer peripheral surface (Invention 5), the plurality of crotch portions are formed, It is preferable that the outer diameter of the vicinity of the spray portion is gradually increased (Invention 6). With this, The liquid spray generated by the aforementioned spray nozzle is generated in the spray direction of the nozzle cover, The spray adhered to the aforementioned crotch portion is allowed to liquefy. As an ideal embodiment, Providing support for the aforementioned nozzle tube, The nozzle cover is detachable from the base portion (Invention 7 The cleaning of the nozzle tube and the nozzle cover can be made easier to be freely loaded and unloaded by a single touch. More ideal. Secondly, Nozzle cap of the present invention, Is a pair of spray nozzles, electrode, The nozzle of the electrostatic spray device of the nozzle cover is a nozzle cap that is detachably mounted and electrically insulated, The spray spray is made into tiny droplets and expanded to spray; The nozzle tube is the spray nozzle; The electrode is disposed close to the outer side of the droplet, Assigning a charge to the aforementioned droplets; The nozzle cover is used to cover the mist nozzle and the periphery of the nozzle tube. And used to maintain the aforementioned electrical insulation, And having an intake port for taking in outside air by a negative pressure generated by spraying from the aforementioned spray spray, Installed on the aforementioned nozzle cover, So that after installation to the aforementioned nozzle, An annular surface that opens in both the spray direction and the reverse spray direction, Have and suppress the front direction, Each crocodile is accompanied by a base portion that is easily peeled off from the surrounding area. Take this. Especially the mouth, Nozzle cover, The nozzle can be used to support a wide range of cap electrodes as described above. The liquid with the mouth is characterized by the state of the cover. The gap division -9- 200819207 (7) Around the nozzle tube, And the outer peripheral surface is opposite to the aforementioned intake port (Invention 8). As an ideal embodiment, have: In the installation state to the aforementioned nozzle cover, a cylinder that is concentrically located around the circumference of the nozzle tube; In the outer cylinder, a cylinder that is concentrically located around the nozzle tube; Formed between the outer cylinder and the inner cylinder, Forming an annular gap outside the annular gap; Formed between the inner cylinder and the nozzle tube, Forming an inner annular gap of the aforementioned annular gap; And in the position near the end of the anti-spray direction, An inner cylinder support member that connects the outer cylinder and the inner cylinder to each other (invention 9). An electrostatic spray device according to another embodiment of the present invention, The spray nozzle is supported on the front of the spray bowl. The spray raft is a cylindrical portion having an annular gap that is opened to the front and rear sides (Invention 1). According to this embodiment, Since the spray droplets do not easily enter the aforementioned annular gap, and so, The continuous film forming the droplets of the spray adhered to the spray hopper is broken at the aforementioned annular gap. With this, Can prevent, The high potential applied to the electrode is transmitted through the continuous film having conductivity to the rear of the annular gap. Thus preventing leakage, Short circuit, Sense of electricity and so on. And the opening of the front and rear sides due to the aforementioned annular gap, and so, There is no possibility that the washing water supplied into the annular gap remains inside. Therefore, even if the spray droplets enter the aforementioned annular gap, It is also possible to clean the inside easily and surely. also, When the electrostatic spray portion is placed upside down after the washing operation, It is also possible to prevent droplets flowing along the spray raft from accumulating to the aforementioned annular gap. And, Even in the spray job, -10- 200819207 (8) Due to accidental reasons such as water spray, etc. The droplets are dripped from the front of the spray hopper along the surface of the spray raft, Also because the droplet will pass through the aforementioned annular gap, and so, If the operator holds the aforementioned outer tube portion, There are no problems such as electric power. As an ideal embodiment, The front portion of the outer tubular portion has at least two joint portions (invention 11). In this case, The surface area of the front portion of the outer tubular portion is increased by the amount of the at least two joint portions. and so, It takes time for the spray droplets to adhere to the front surface of the aforementioned outer tubular portion. therefore, a continuous film that does not easily produce spray droplets, Very ideal. and, Flowing through the at least two connected crotch portions toward the longitudinal direction of the spray raft, It can function to peel the droplets from the crotch. therefore, Even if the spray droplets are attached to at least the two crotch portions, It is highly desirable that the continuous film of the spray droplets is also broken. As an ideal embodiment, The outer tubular portion has: In order to increase the support strength of the aforementioned spray crucible, And extending in the longitudinal direction of the spray rib (Invention 12). With this, Even if the operator holds the aforementioned outer tube portion, To support the aforementioned spray raft, There is no problem in terms of strength. 〇 As an ideal embodiment, the spray raft is provided with a weir portion at a position rearward of the outer tubular portion (Invention 13). With this, Even if the droplet flows down between the aforementioned annular gaps, It can also prevent it from flowing down further than the aforementioned crotch, and so, Extremely ideal. [Embodiment] -11 - 200819207 (9) Below, Referring to the drawing, An embodiment of the present invention will be described. Fig. 1 is a partially cutaway side view showing an electrostatic atomizing device according to an embodiment of the present invention. Fig. 2 is an enlarged side elevational view of the electrostatic spray portion of Fig. 1; Fig. 3 is a top view of the electrostatic spray portion of Fig. 2; Figure 4 is a cross-sectional view of the arrow IV-IV of Figure 3; Figure 5 is a cross-sectional view of the V-V arrow of Figure 4; Fig. 6 is a cross-sectional view corresponding to Fig. 4 of the electrostatic spray portion of the electrostatic spray device according to another embodiment of the present invention. Figure 7 is a perspective view of the front grip of Figure 1. Figure 8 is a cross-sectional view of the front grip of Figure 1. Figure 9 is a cross-sectional view of the arrow IX-IX of the drawing. The electrostatic spray device of the present invention, Is used to charge tiny droplets of conductive liquid. a device that is attached to an object efficiently, For example, it is ideally suited for use in devices that spray pesticides or fertilizers on crops. In the map, As an embodiment of the present invention, An electrostatic spray device with a hand-held spray sputum is displayed, But this is only an example, The present invention can also be applied to a walking sprayer having a plurality of electrostatic spray portions along a long boom. As shown in Figure 1, The electrostatic spray device i' according to an embodiment of the present invention has a hand-held spray gun 4, The spray crucible has an electrostatic spray portion 2' at the front portion and an operation portion 3 at the rear portion. The operation unit 3 is provided with: Spreading the cock 5 Power switch 6, And a rear grip 7 that is suitable for the operator to hold the shape in one hand. In the rear grip 7, The battery 8 as a power source is exchangeably accommodated. The electrostatic spray unit 2 is provided with: The liquid can be made into tiny droplets and expanded to spray spray nozzle 9; Adjacent to the outer side of the expanded range of the liquid, the droplets are applied to the electrode 10 of the charge; And covering •12- 200819207 (10) Around the aforementioned spray nozzle 9, The nozzle 棻l9 of the aforementioned electrode 10 is maintained. The electrode 1 〇 is in this embodiment, The annular electrode ‘ is formed concentrically in front of the spray direction of the spray nozzle 9. The liquid in the spray_tank 11 is pumped by 12, The pressure is sent to the aforementioned spray nozzle 9. At the same time, the battery 8 is facing the aforementioned electrode 10, Supply the power necessary to carry out static electricity. The droplet S ejected from the spray nozzle 9 is expanded to the side. While passing through the space inside the ring electrode 1〇, Released to the atmosphere. For the aforementioned spray droplet s, While passing through the aforementioned ring-shaped electrode 1〇, The charge is given by the ring electrode 10. therefore, Can lift the aforementioned spray, The adhesion of the liquid droplet s to an object having a reverse polarity. In order to enhance women's integrity and suppress power loss during power transmission, A booster 13 is disposed in the vicinity of the ring-shaped electrode 1 〇. The booster 13 boosts the voltage of the electric power supplied by the battery 8 at a low voltage of about 6 V to, for example, about 4 · 5 kV. It is supplied to the above-mentioned annular electrode 10 again. The aforementioned spray 竿 4, A slender tube 14 having a good chemical resistance to the plastic is used as the corpus callosum. At the front end portion 1 4f of the manifold 14 Supporting the base portion 20 of the electrostatic spray portion 2, At the rear end portion 14 r of the aforementioned manifold 14, The aforementioned operation unit 3 is supported. In the aforementioned manifold 14 An electric wiring 15 that supplies electric power to the booster 13 is housed, And the spray liquid is supplied to the liquid supply pipe 16 of the spray nozzle 9. also, In the aforementioned manifold 14, At an appropriate position between the front end portion 14f and the rear end portion 14r, Installed with front grip 1 7 . Behind the front grip 17, A sling is is attached to connect a shoulder line (not shown). -13- 200819207 (11) The operator can hang the aforementioned spray raft 4 with the aforementioned shoulder line to hold the front grip 17 and the rear grip 7 described above, Spray operation. As shown in Figure 4, In the aforementioned base portion 20 of the electrostatic spray portion 2, Supporting a nozzle tube 21 extending in the direction of the spray, At the front end of the nozzle tube 21, The aforementioned spray nozzle 9 is supported concentrically. The spray nozzle 9 passes through the aforementioned nozzle tube 21, The communication pipe 16 (see Fig. 1) is connected to the liquid supply pipe. The nozzle cover 19 is opposite to the base portion 20, It can be detachably connected. Free loading and unloading connection form, Can also be screwed, Can also be pressed in, However, it is preferable to be able to perform loading and unloading with a single touch. In the example shown in Figure 4, In the center of the base portion 19r of the nozzle cover 19, There is a cylindrical hole 22, The cylindrical portion 23 of the base portion of the nozzle tube 21 is pressed into the cylindrical hole 22. Between the nozzle cap 19 and the base portion 20, A locking mechanism for preventing the fall of a suitable shape is provided. The cylindrical hole 2 2 and the cylindrical portion 23 are sealed by a seal ring 24 . also, Between the nozzle cap 19 and the base portion 20, A sealing material 25 is also incorporated. Both the nozzle cover 19 and the base portion 20 are formed of a material having electrical insulation such as plastic. The nozzle cap 19 is provided with: a cup-shaped cover body 26 that opens toward the spray direction; And a cover 28 that is detachably coupled to the opening portion 27 of the front portion of the cover body 26. The cover body 26 is provided with the cylindrical hole 22 at the end portion 2 on the side of the reverse spray direction. The cover body 26 covers the periphery of the spray nozzle 9 and the nozzle tube 21, Can play, The spray droplets S released by the spray nozzle 9 toward the outside of the nozzle 14-200819207 (12) cover 19 are prevented from adhering to the circumferential surfaces of the spray nozzle 9 and the nozzle tube 21 (spray droplet breakage) effect). also, The cover 28 can be played, The annular electrode 10 is held between the cover body 26 and the cover body 26. The ring-shaped electrode 1 is held between the cover body 26 and the cover 28, It is held concentrically with these components. The high voltage cable 29 extending from the booster 13 housed in the base portion 20 is inserted into the cable insertion hole 30 formed in the cover body 26, It is electrically connected to the ring electrode 10 . Formed on the circumferential surface of the cover body 26, By the negative pressure generated by spraying the liquid from the aforementioned spray nozzle 9, Inhalation port 3 for inhaling outside air. The reason for setting the intake port 3 1 is as follows. As mentioned above, The cover body 26 is configurable, The spray droplets S released by the spray nozzle 9 toward the outside of the nozzle cover 19 are prevented from adhering to the circumferential surfaces of the spray nozzle 9 and the nozzle tube 21. From this point of view, There is a contradiction in the provision of the hole (the aforementioned suction port 3 1 ) in the cover body 26 described above. but, When the aforementioned suction port 3 1 is not provided on the circumferential surface of the cover body 26, The droplets S ejected by the aforementioned spray nozzle 9 are due to the aforementioned negative pressure. In the ring-shaped electrode 1〇, it is attracted toward the reverse spray direction. It intrudes into the cover body 26 as described above. In contrast, If the intake port 3 1 is provided on the circumferential surface of the cover body 26, Along with the liquid spray from the aforementioned spray nozzle 9, A continuous air flow A of air flowing from the intake port 31 toward the spray direction is formed in the cover body 26, Therefore, the spray droplets S do not easily enter the lid body 26. The number of the aforementioned suction ports 3 1 , shape, Size and location, By -15-200819207 (13) Air intake, In view of the balance of the spray droplets of the cover body 26, etc., It is better to set it in a range that meets the following requirements. First of all, The total area of the suction port 3 1 is the total area of the peripheral surface of the cover body 26, It is better not to exceed the range of 1 /2. With this, The negative pressure of the spray droplets of the cover body 26 is not greatly impaired, and the aforementioned negative pressure can be effectively utilized. It is possible to ensure the amount of ventilation necessary for the adhesion suppression of the spray droplets S or the droplets to be peeled off. also, It is preferable that the intake port 31 is opened at a position further rearward than the spray nozzle 9 to a position further forward than the spray nozzle 9. Take this A continuous air flow A of the air directed rearward from the rear side of the spray nozzle 9 can be surely formed in the cover body 26. In this embodiment, As shown in Figure 2 and Figure 3, Only a small amount of the front and rear portions of the aforementioned cover body 26 are left over the entire length of the cover body 26, The above-mentioned respective suction ports 3 1 are formed. And, The intake port 31 is in the circumferential direction of the cover body 26, It is preferable to form plural numbers at intervals. With this, Can be in the aforementioned nozzle cover 19, The continuous airflow A in the form of a curtain is more reliably formed over the entire circumference of the spray nozzle 9. and, Even in the state in which the aforementioned cover 28 is mounted, A rod-shaped cleaning tool (not shown) is inserted into the intake port 31, It is easy to clean the inner circumferential surface of the cap body 26 or the outer circumferential surface of the spray nozzle 9. In this embodiment, As can be seen from Figures 2 and 3, At equal angles, Four aforementioned intake ports 3 1 are formed on the circumferential surface of the cover body 26, as shown in Fig. 4, In the aforementioned nozzle cover 19, Equipped with a cylindrical spray -16- 200819207 (14) Nozzle cap 32. The nozzle tube cover 32 covers the periphery of the nozzle tube 21 in the nozzle cover 19, The spray droplets S are prevented from adhering to the outer peripheral surface of the nozzle tube 21. The nozzle tube cover 32 is formed of a material having electrical insulation such as plastic. The nozzle cap cover 32 is a nozzle cap itself of an embodiment of the present invention together with the components of the electrostatic spray device 1 of one embodiment of the present invention. The nozzle tube cover 32 is formed, The cover body 26 is detachably attachable. therefore, The nozzle tube cover 32 is easily removed by the cover body 26, The nozzle tube cover 32 itself and the outer peripheral surface of the nozzle tube 21 are washed. Therefore, The cleaning operation can be performed more easily and surely. Free loading and unloading form, It is better to make a press-in type. This is because a tool for attaching and detaching the nozzle cap 3 2 described above is not required. It is easy to carry out loading and unloading operations with a single touch. In this embodiment, On the outer peripheral surface of the end portion of the nozzle tube cover 32 opposite to the spray direction, Integrally formed with a press-in flange 33, In the cover body 26, Featuring: Receiving the aforementioned press-fitting flange 33, The step portion 34 of the press-in depth of the nozzle tube cover 32 is restricted. In a state where the nozzle cap cover 32 is pressed into the normal position of the cap body 26, The outer peripheral surface of the nozzle cap 32 is opposed to the intake port 31. The nozzle tube cover 32 is in a state where the cover 28 is removed from the cover body 26, It is easy to extract from the aforementioned opening portion 27 of the cover body 26. The nozzle tube cover 32 is an annular gap (the outer annular gap 36, which is opened in both the spray direction and the reverse spray direction, The inner annular gap 3 5 ) is zoned around the nozzle tube 21 described above. In the example of Figure 4, The aforementioned nozzle -17- 200819207 (15) The tube cover 3 2 has: In the aforementioned nozzle cover 9, Concentrically disposed outside the circumference of the nozzle tube 21 outside the cylinder 37; And in the outer cylinder 37, The inner cylinder 38 is disposed concentrically around the nozzle tube 2 1 . The outer annular gap 3 6 is defined between the outer cylinder 3 7 and the inner cylinder 38. The inner annular gap 35 is partitioned between the inner cylinder 38 and the nozzle tube 21. The outer cylinder 37 and the inner cylinder 38, At the position near the end of the reverse spray side of these, They are connected to each other by the inner cylinder support member 39. The inner cylinder support member 39 is disposed on each of the cylinders 37, 3 8 The position near the end of the reverse spray direction side, This is because, by being away from the aforementioned spray nozzle 9 and the aforementioned ring-shaped electrode 10, The time during which the inner cylinder support member 39 promotes the continuous film growth of the spray droplets S can be strongly retarded. The inner cylinder support member 39 is as shown in FIG. In the circumferential direction of the outer cylinder 37 and the inner cylinder 38, A plurality of them are formed at intervals (four in the example of Fig. 5). With this, It is possible to ensure the state in which the outer annular gap 36 is opened toward both the spray direction and the reverse spray direction. In the aforementioned outer cylinder 37, The press-fitting flange 33 is formed. In the foregoing structure, When the liquid is ejected by the spray nozzle 9, it is pulled by the flow of the spray liquid. A negative pressure is generated in the aforementioned nozzle cover 19, therefore, The suction port 3 1 is directed into the nozzle cover 1 9 Inhale the outside air. The air sucked into the nozzle cover 19 is along the outer circumferential surface of the nozzle tube cover 32 and the outer circumferential surface of the spray nozzle 9. Flowing in the direction of the spray, Through the aforementioned annular electrode 10, Together with the aforementioned spray droplet s, it becomes a continuous air flow A, Released to the front. therefore, It is possible to prevent the aforementioned spray droplets s -18 - (16) (16) 200819207 from adhering to the inner surface of the cover body 26, An outer circumferential surface of the spray nozzle 9 and an outer circumferential surface of the nozzle tube cover 32, Even if the spray droplets S adhere 'because they are peeled off by the above-described continuous drawing airflow A before accumulation, they do not grow into large droplets. therefore, It is difficult to form a continuous film of the aforementioned spray droplets S in the nozzle cap 19, It can prevent voltage drop caused by short circuit or leakage. also, In this embodiment, Since the nozzle cap cover 3 2 is disposed around the nozzle tube 2 1 , and so, Even if the aforementioned spray droplet S enters the nozzle cap 19, It is also difficult to adhere to the periphery of the nozzle tube 21. Therefore, It is difficult to cause a voltage drop due to a short circuit or leakage due to adhesion of the aforementioned spray droplets S. also, Because the outer annular gap 3 6 and the inner annular gap 35 are narrow, Therefore, the spray droplets S are also not easily invaded into these gaps. 3 6 inside. Especially in the example of Figure 4, The inner cylinder 38 is slightly extended from the outer cylinder 37 toward the spray direction. At the end of the inner cylinder 38 on the spray direction side, Forming a reduction to the inward flange 40 of the aforementioned spray nozzle 9, therefore, The possibility that the spray droplets S intrude into the aforementioned inner annular gap 35 can be minimized. And, Because of the outer peripheral surface of the nozzle tube 21, A plurality of crotch portions 4 1 having a creeping distance extending in the longitudinal direction thereof are formed and so, Even in the case where the mist droplets S intrude into the aforementioned inner annular gap 35, The continuous film of the spray droplets S adhering to the outer peripheral surface of the nozzle tube 21 also takes a long time to grow to the base side of the nozzle tube 21. therefore, It is not easy to generate a short circuit or electric leakage caused by the continuous film of the spray droplet S described above. The possibility of voltage drop can be further suppressed. -19- (17) (17)200819207 Again, In the example of Figure 4, The nozzle tube cover 32 is a cylinder 3 8 which is double inside and outside. 3 7 formed, Its surface area is large. therefore, Even if you spray for a long time, The spray droplets S are caused to enter the aforementioned annular gaps 35, Within 36, Also, the creeping distance from the spray nozzle 9 to the ring-shaped electrode 1〇 is large, and so, The spray nozzle 9 and the annular electrode i 电 are electrically connected by a continuous film of the spray droplets S, It takes longer. therefore, It is less likely to cause a voltage drop due to a short circuit or leakage. And, The outer annular gap 36 and the inner annular gap 35 are open to both the spray direction and the reverse spray direction. and so, Even when the spray droplets S enter the aforementioned annular gaps 36, Within 3 5, It is also easy to wash with water. And the washing water does not remain in the aforementioned annular gaps 36, 35. The cleaning operation can be performed in a state where the nozzle tube cover 32 is attached to the cover body 26, The nozzle cap cover 3 2 can also be removed to perform the above. In the present embodiment, Emphasis is placed on the suppression of the spray droplets S _ into the nozzle cap 19 and the growth of the attached droplets, Therefore, the possibility of high voltage leakage necessary for electrostatic charge is extremely low. As another feature of this embodiment, As shown in Figure 2 and Figure 3, A plurality of crotch portions 42 are formed on the outer peripheral surface of the cap body 26) of the nozzle cap 19. The plurality of jaws 4 2 can perform the following functions. which is, The creeping distance of the outer peripheral surface of the nozzle cover 19 to the reverse spray direction can be enlarged. Further, the continuous film of the spray droplets S which suppresses the outer peripheral surface of the nozzle cover 19 is enlarged. The plurality of crotch portions 42 are formed, Accompanied by the direction of the spray, -20- 200819207 (18) The outer diameter of each of the jaws 42 is gradually increased. With this, The air flow in the spray direction of the nozzle cap 19 is generated by the liquid spray accompanying the spray nozzle 9, The droplet adhering to the crotch portion 42 is easily peeled off. Among the plurality of crotch parts 4 2, The outer diameter of the flange portion 42 disposed at the position of the most contact cover 28 is the same as that of the outer cover 28 described above. As another embodiment of the nozzle tube cover 32, Also shown, A structure having a single cylinder is formed. The nozzle tube of Fig. 6 is provided with the same cylinder 44 as the inner cylinder 38, On the outer peripheral surface of the end portion of the cylindrical body 44 on the mist direction side, The press-fitting flange 45 which has the same function as the front flange 33 is formed. Between the aforementioned barrel nozzle tubes 21, The same gap 46 is formed as the aforementioned inner annular gap 35. In the other structure of Figure 6, Same as Figure 4, Therefore, the same symbols are given and the description thereof is omitted. As shown in Fig. 8, the second vacuum container 4 is provided with a cylindrical portion 5 1 other than the annular gap 50 which is opened toward the opening. In the present embodiment, the grip 17 has the outer tubular portion 51. But not limited to this, In order to be independent of the aforementioned front grip 17, The aforementioned outer tube sound is provided. The front grip 17 has the following: The aforementioned outer tubular portion 5 i ; Concentric with the inner tubular portion 5 2 in the outer tubular portion 51; And a rib 53 disposed between the outer and inner tubular portions 52. This rib 53 It also functions as a spacer that forms a space portion between the inner circumferential surface 54 of the tubular portion 51 and the outer circumferential surface 55 of the inner tubular portion 52. The front grip i 7 is formed of a material such as a chemical resistant and electrically insulating plastic. The surrounding spray liquid from the vicinity of the above-mentioned diameter is roughly as shown in Fig. 6 43. The back-spraying is indented 44 and the ring is given to the front and rear. Made can also be made ; 5 1 〇 配置 ί 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 The size of the outer peripheral surface to be fitted. The front end surface 52f of the inner tubular portion 52 is located rearward of the front end surface 5 If of the outer tubular portion 51. Similarly, The rear end surface 52r of the inner tubular portion 52 is also not located rearward of the rear end surface 5 1 r of the outer tubular portion 51. The outer tubular portion 51 has an inner diameter larger than the outer diameter of the inner tubular portion 52. The rib portion 53 or the spacer connects the inner circumferential surface 54 of the outer tubular portion 5 1 and the outer circumferential surface 55 ′ of the inner tubular portion 52 in the radial direction and is formed by the front end surface 52 f of the inner tubular portion 52 to the foregoing The rear end surface 51r of the outer tubular portion 51, It extends in the longitudinal direction of the aforementioned front grip 17 (the aforementioned spray bowl 4). A plurality of the aforementioned ribs 5 3 are provided at equal angular intervals around the inner cylindrical portion 52. In this embodiment, As shown in Figure 9, There are four aforementioned ribs 5 3 . The rib portion 5 3 strongly connects the inner cylindrical portion 5 2 and the outer cylindrical portion 51 Guaranteed, The operator holds the support strength when the front grip 17 supports the aforementioned spray raft 4. By setting the aforementioned ribs 53, Between the inner circumferential surface 54 of the outer tubular portion 51 and the outer circumferential surface 55 of the inner tubular portion 52, A plurality of hollow portions 延伸 extending in the longitudinal direction of the spray raft 4 are formed in the division. These plurality of hollow portions are open toward the rear of the spray meter 4. In the aforementioned inner cylinder portion 52, The extending portion 56 extending rearward from the outer tubular portion 51 serves as a fixing portion for fixing the front grip 17 to the manifold 14. which is, As shown in Figure 7, In the aforementioned extension portion 5 6, A plurality of slits 5 7 extending in the longitudinal direction of the inner cylindrical portion 52 are formed. As a -22- 200819207 (20) tight fixture, Using two half-rings that will become a pair. 5 8 sets of ring fasteners 5 9 . The loop fastener 59 is also formed of a material such as a plastic having electrical resistance and electrical insulation. With the aforementioned pair of half rings 5 8 , 5 8 surrounds the outer peripheral surface of the aforementioned extension portion 56, The front pair of half-rings 58 are self-tapping screws, 58 is combined into a ring shape. With this, The extension portion 56 is fastened in a direction in which the inner diameter is reduced. The aforementioned front grip 17 is firmly fixed to the aforementioned manifold 14. The aforementioned loop fastener 59 is in a fixed state of the grip. Behind the aforementioned outer portion 5 1 , A crotch portion is formed on the inner tubular portion 52. In the embodiment, The above-mentioned annular fastener 59 also serves as the aforementioned crotch portion. Furthermore, As shown in Figure 8, The mounting position of the annular fastener 59 in the longitudinal direction of the extending portion 56 is created. A position having a gap between the rear end surface 51r of the outer tubular portion 51 and the annular fastener 59 is due to the plurality of hollow portions between the outer tubular portion 51 and the inner tubular portion 52 in advance. The shovel is opened toward the rear of the spray shovel 4. , At the rear end portion of the aforementioned extension portion 56, A projection 61 for preventing the aforementioned ring member 59 from coming off is provided. Same as shown in Figure 8, In front of the aforementioned inner tubular portion 52, The annular gap 50 is formed by the front inner peripheral surface 54f of the outer tubular portion 51 and the outer peripheral surface of the manifold 14. The annular gap 50 is open to the front and rear sides of the front grip. In this embodiment, The annular gap 50 is the plurality of hollow portions 区 defined by the rib portion 53. The rear opening of the front grip 17 is described. The aforementioned annular gap 50 is achievable, Preventing the 竿 形 17 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 少· 刖 刖 -23- 200819207 (21) The role of a continuous film that produces spray droplets between the front grips and 17 is described. which is, The fine spray droplets S discharged from the electrostatic spray portion 2 float in the atmosphere and adhere to the outer surface of the manifold 14 as well. When spraying is carried out continuously for a long time, Then the attached spray droplets will not grow as long as the flow', but The area where the spray droplets adhere is enlarged toward the rear of the spray bowl 4. The final droplet adheres to the outer surface of the front grip 17 (the outer tube portion 5 1 described above). When the film of the spray droplet of the outer surface of the aforementioned manifold 14 is connected to the film of the spray droplet of the outer surface of the outer cylinder portion 51, Then, the operator's hand holding the front grip 17 described above, There is a danger of high voltage leakage or electric shock. but, In this embodiment, Since the aforementioned annular gap 50 is provided between the aforementioned manifold 14 and the outer tubular portion 51, The spray droplets do not easily enter the annular gap 50, Therefore, A film capable of preventing the spray droplets of the outer surface of the aforementioned manifold 14 from being connected to the film of the spray droplets of the outer surface of the front grip 17 described above, Therefore, the above problem will not occur. In this embodiment, Because the annular gap 50 is open to the front and rear sides of the front grip 1 7 , and so, Even if the spray droplets enter the aforementioned annular gap 50, Can also use washing water, The inside of the aforementioned front grip 17 is easily and surely cleaned. also, It is also possible to prevent droplets flowing along the manifold 14 from collecting into the annular gap 50 when the electrostatic spray portion 2 is placed upside down after the cleaning operation. And, Even in the spray job, Due to accidental reasons such as water covering spray 竿 4, etc. The droplets are dripped from the front surface of the spray nozzle 4 along the surface of the manifold 14 Also, the droplet passes through the aforementioned annular gap 50 and the plurality of hollow portions Η, and so , If the operator holds the aforementioned front grip, There will be no electricity, etc. -24- 200819207 (22) The problem arises. also, In this embodiment, At a position further rearward than the aforementioned outer cylinder portion 51 of the front front gripper 17, The aforementioned annular fastener 5 9 as a crotch portion is provided. therefore, Even if the droplets flowing down the surface of the manifold 14 pass through the annular gap 50 and the plurality of hollow portions ’ ', it can be prevented from flowing downward toward the annular fastener 59. In this embodiment, The front side inner peripheral surface 54f of the outer tubular portion 51 and the outer peripheral surface of the manifold 14 are partitioned into the annular gap 50. But not limited to this, Also as shown in Figure 8, The front end portion 52f of the inner tubular portion 52 is extended to the front end surface 51f of the outer tubular portion 51, The annular gap 50 is defined by the front inner circumferential surface 54f of the outer tubular portion 51 and the front extension portion of the inner tubular portion 52. at least, The front inner peripheral surface 54f of the outer tubular portion 5 1 may be associated with the division of the annular gap 50. also, As another embodiment, Can also be made into the following structure, which is, The inner cylinder portion 52 is omitted, The rib 53 is brought into contact with the outer surface of the manifold 14. Furthermore, The ratio of the formation range of the annular gap 50 in the longitudinal direction of the front grip 17 to the formation range of the rib 53 is a blocking effect of a continuous film using the spray droplets of the annular gap 50. , And the strength enhancement effect of the aforementioned front grip 17 using the aforementioned ribs 5 3 , Let's decide appropriately. For the sake of simplicity, In this embodiment, On the surface of the outer cylinder portion 51, It can be the same as other grips. Forming a concave shape that matches the shape of the finger -25- 200819207 (23) convex, Or implement anti-slip processing. As shown in Figure 8, The front grip 17 is at the outer periphery of the front portion of the outer tubular portion 51. There are at least two links (in the figure of the example), the crotch part 62. In this case, The surface area of the front portion of the outer tubular portion 51 increases the amount of the at least two connected crotch portions 62. Therefore, it takes time for the spray droplets to adhere to the front surface of the aforementioned outer cylindrical portion 51. therefore, In the foregoing front gripper 17, it is not easy to form a continuous film of spray droplets. and, The airflow passing through the at least two connected crotch portions 62 in the longitudinal direction of the spray port 4, It acts to peel off the droplets from the crotch portion 62. therefore, Even if the spray droplets are attached to the at least two connected crotch portions 62, It is highly desirable that the continuous film of the spray liquid is also broken. At least two of the aforementioned crotch portions 62, It may also be formed in advance with the outer tubular portion 51. It may be a material which is formed of a material such as plastic having chemical resistance and electrical insulation, and is fixed to the outer periphery of the outer cylindrical portion 51. In front of the aforementioned front grip 17, Between the aforementioned front end face 51f of the outer tubular portion 51, Interval Cf, A crotch portion 63 is provided. The crotch portion 6 3 is also formed of a material such as a plastic having chemical resistance and electrical insulation. See the crocodile section 6 3 in front of the target 刖 刖 grip grip 1 7 Increasing the surface area of the aforementioned spray crucible 4, Delaying the formation of a film of spray droplets. also, By setting the aforementioned section 6 3, The spray droplets are made less likely to enter the aforementioned annular gap 50. It is preferable that the aforementioned crotch portion 63 is formed at least two. Thereby, the formation of the film of the droplets can be delayed and the droplet peeling effect can be achieved. also, The aforementioned crotch portion 63 may be integrally formed with the aforementioned manifold 14 in advance. It can also be different from the 丨 tube 丨 -26- 200819207 (24) The body former is fixed to the crotch of the outer circumference. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partially cutaway side view showing an electrostatic atomizer according to an embodiment of the present invention. Fig. 2 is an enlarged side elevational view of the electrostatic spray portion of Fig. 1; Fig. 3 is a top view of the electrostatic spray portion of Fig. 2; Figure 4 is a cross-sectional view of the arrow IV-IV of Figure 3; Figure 5 is a cross-sectional view of the V-V arrow of Figure 4; Fig. 6 is a cross-sectional view corresponding to Fig. 4 of the electrostatic spray portion of the electrostatic spray device according to another embodiment of the present invention. Figure 7 is a perspective view of the front grip of Figure 1. Figure 8 is a cross-sectional view of the front grip of Figure 1. Figure 9 is a cross-sectional view of the arrow IX-IX of Figure 8; [Main component symbol description] A : Continuous gas flow Cr : Clearance Η : Hollow S: Spray droplet 1 : Electrostatic spray device 2 : Electrostatic spray part 3 : Operation unit 4 : Spray 竿 -27- (25) (25)200819207 5 : Spreading cock 6 : Power switch 7 : Rear grip 8 : Battery 9 : Spray nozzle 10: (ring) electrode 1 1 : Spray tank 1 2 : Pump 13 : Booster 1 4 : 竿 tube 14f : Front end 14r : Back end 1 5 : Wiring 1 6 : Liquid feeding pipe 1 7 : Front grip 1 8 : Ring 1 9 : Nozzle cover 2 0 : Base portion 21 : Nozzle tube 22 : Cylindrical hole 2 3 : Cylindrical part 24 : Sealing ring 2 5 : Sealing material 26 : Cover body -28- (26) (26)200819207 27 : Opening 28 : Cover 2 9 : High voltage cable 3 0 : Cable insertion hole 3 1 : Suction port 3 2 : Nozzle cap 3 3 : Pressing flange 3 5 : Inner annular gap 3 6 : Outer annular gap 3 7 : Outer cylinder 3 8 : Inner cylinder 3 9 : Inner cylinder support 4 0 : Pressurizing member 4 1, 4 2, 6 2, 6 3 : 43部 43 : Nozzle cover 44 : Cylinder 46 : Annular clearance 5 0 : Annular clearance 5 1 : Outer tube part 5 1 f : Front end face 5 1 r : Rear end face 5 2 : Inner tube part 5 2 f : Front end face 52r: Rear end face -29 200819207 (27) 5 3 : Rib 54 : Inner peripheral surface 5 4 f : Front side inner circumference 5 5 : Outer surface 5 6 : Extension 5 7 : Slit 5 8 : Half ring 5 9 : Ring fastener 6 0 : Self-tapping screws 61 : Convex