200900157 九、發明說明 【發明所屬之技術領域】 本發明係關於旋轉式靜電塗裝裝置。 【先前技術】 靜電塗裝技術，係藉由靜電力使微粒化的塗料電性吸 附於被塗裝物（工件），關於實現此技術之裝置，爲人所 知者有具備旋轉頭（一般稱爲「鐘形杯」）之旋轉式靜電 塗裝裝置。此類的旋轉式靜電塗裝裝置，係適用於粉體塗 料、絕緣性液體塗料（例如油性塗料）及導電性液體塗料 (例如水性塗料）。例如，若爲用於絕緣性塗料之靜電塗 裝裝置，典型上係採用將高電壓施加於旋轉頭使塗料帶電 之方式。此外，若爲用於導電性塗料之靜電塗裝裝置，則 採用將高電壓施加於塗裝裝置的外部上所設置之外部電極 ，而使塗料帶電之方式。 爲了使塗料朝向被塗裝物，旋轉式靜電塗裝裝置係使 用成形空氣（shaping air )。專利文獻1係指出若增大成 形空氣量則會使塗裝圖案寬度變小之問題點，爲了改善此 ^ 問題點，乃提出將成形空氣傾斜吐出至旋轉頭的旋轉軸線 ' 周圍者。在此藉由引用專利文獻1而省略其詳細說明，但 隨著成形空氣量的增大使塗裝圖案寬度變小者，旋轉頭的 前方區域中所產生之負壓爲其原因，由於此負壓使成形空 氣往內側靠近，導致塗裝圖案寬度變小。 爲了解決此問題，專利文獻1中所揭示之發明係提出 -4- 200900157 下列手法，亦即以傾斜方向將成形空氣吐出至旋轉頭的旋 轉軸線周圍，藉此形成螺旋狀氣流的成形空氣，並藉由此 螺旋狀氣流所形成之離心力，降低上述負壓的影響或抵消 上述負壓的影響而擴大塗裝圖案寬度。 專利文獻1之發明’於使用旋轉式靜電塗裝裝置進行 包含鋁片或雲母等之金屬塗裝時，於爲了提高金屬塗裝的 加工品質（明亮度）而增大成形空氣量時，乃較爲有效。 專利文獻2係指出下列問題，根據依循上述專利文獻 1的發明之旋轉式靜電塗裝裝置，由於塗裝圖案寬度爲固 定’於例如對汽車支柱等之寬度較狹窄的部位進行塗裝時 ，會形成過量噴霧而導致塗料損失等問題，因而提出可針 對此問題之改善案。 具體而言，專利文獻2係提出，除了專利文獻1所提 出之以傾斜方向將成形空氣（第1成形空氣）吐出至旋轉 頭的旋轉軸線周圍之手法之外，更將第2成形空氣吐出至 該外周側’且使該第2成形空氣與第1成形空氣碰撞，藉 此縮小塗裝圖案寬度之手法。 專利文獻3，並非如專利文獻！、2般將成形空氣傾斜 吐出至旋轉頭的旋轉軸線周圍，而是提出將成形空氣朝向 旋轉頭的圓錐狀外周面吐出’並且將圖案控制空氣吐出至 較此成形空氣更位於外周側’且使該將圖案控制空氣與成 形空氣碰撞，藉此縮小塗裝圖案寬度之手法。 〔專利文獻1〕日本特開平3-101858號公報 〔專利文獻2〕日本特開平7_24367號公報 200900157 〔專利文獻 3〕US P6,991，178 【發明內容】 (發明所欲解決之課題） 本發明之目的在於，如專利文獻1所揭示般將成形空 氣傾斜吐出至旋轉頭的旋轉軸線周圍時，改善塗裝圖案寬 度爲一定之問題點。 本發明之其他目的在於，提供一種可使塗裝圖案寬度 成爲可變之旋轉式靜電塗裝裝置。 (用以解決課題之手段） 上述的技術性課題，可根據本發明提供一種旋轉式靜 電塗裝裝置而達成，此旋轉式靜電塗裝裝置，爲具有使塗 料往徑向外側飛散之旋轉頭，且藉由成形空氣，使從該旋 轉頭的外周緣所噴出之塗料朝向被塗裝物噴霧之旋轉式靜 電塗裝裝置，其特徵爲：上述成形空氣係傾斜於旋轉頭的 旋轉軸線周圍地被吐出；於該成形空氣的外周側，圖案控 制空氣係與該成形空氣鄰接而被吐出；該圖案控制空氣， 係朝向與上述成形空氣的吐出方向爲同一方向，傾斜於上 述旋轉頭的軸線周圍地被吐出；上述圖案控制空氣的傾斜 角（々）之絕對値，係較上述成形空氣的傾斜角（α )之 絕對値還大。 第1圖係顯示本發明之槪念構成圖，圖式中，參照圖 號L係表示旋轉頭的旋轉軸線。成形空氣吐出口 1，係由 -6- 200900157 被排列配置在以旋轉頭的旋轉軸線L爲中心之第一圓周2 上之複數個孔所構成。於此第一圓周2的外周側設置有圖 案控制空氣吐出口 3 ’此圖案控制空氣吐出口 3，係由被 排列配置在與上述第一圓周2爲同心之第二圓周4上之複 數個孔所構成。圖中’箭頭A係表示旋轉頭的旋轉方向。 從傾斜於旋轉軸線L周圍之成形空氣吐出口 1中所吐 出之成形空氣5 ’於第1圖中以虛線所表示，係形成第1 螺旋狀氣流。於此成形空氣5之螺旋狀氣流的外周側，形 成有從圖案控制空氣吐出口 3所吐出之圖案控制空氣6的 螺旋狀氣流。 如參照專利文獻1之先前技術的說明中所敘述般，隨 著成形空氣5的量之增加，由於旋轉頭的前方區域中所產 生之負壓，而使塗裝圖案寬度有變小的傾向，但可藉由成 形空氣5的螺旋狀氣流所形成之離心力，降低上述負壓的 影響或抵消該負壓而擴大塗裝圖案寬度。此外，於此成形 空氣5之螺旋狀氣流的外周側，形成有旋繞於與此爲同一 方向之圖案控制空氣6的螺旋狀氣流，並藉由將圖案控制 空氣吐出口 3的傾斜角/3之絕對値，設定爲較成形空氣5 的傾斜角α之絕對値還大，而提高圖案控制空氣6的旋繞 程度，藉此可增長成形空氣5的離心力，並藉由此增長而 更加擴大塗裝圖案寬度。然後，以與成形空氣5的量之間 之關係相對地增減圖案控制空氣的量，藉此將塗裝圖案寬 度控制爲可變。當然，可藉由增減成形空氣5的空氣量而 改變塗裝圖案寬度。因此，於本發明中，可藉由控制成形 200900157 空氣5的空氣量、圖案控制空氣6的空氣量、以及圖案控 制空氣6對成形空氣5的相對空氣量，而將塗裝圖案寬度 控制爲可變。 於第1圖中，較佳的型態爲，將旋繞於同一方向之成 形空氣5及圖案控制空氣6的螺旋狀氣流之旋繞方向，設 定爲與旋轉頭的旋轉方向A爲相反方向。然而，於本發明 中，成形空氣5及圖案控制空氣6的旋繞方向，亦可與旋 轉頭的旋轉方向A爲相同方向。 本發明之旋轉式靜電塗裝裝置，典型上係組裝於汽車 車體的塗裝中所廣泛使用之塗裝機器人，並藉由自動控制 進行塗裝，因應汽車車體的塗裝處進行上述控制，且因應 塗裝處改變塗裝圖案寬度，藉此可降低因過度噴霧鎖造成 之塗料的浪費。依循本發明之旋轉式靜電塗裝裝置，可適 用於液體塗料、粉體塗料所適用之種種形式的靜電塗裝裝 置，此外，亦可適用於絕緣性塗料、導電性塗料所適用之 各種的靜電塗裝裝置。當然，亦可適用於適合增加成形空 氣的量之金屬液體塗料。 【實施方式】 以下係根據附加圖式，說明本發明之較佳的實施例。 第1實施例（第2圖〜第4圖）： 圖式的旋轉式靜電塗裝裝置1 〇，與以往相同，係具有 以裝置主體1 1中所內藏之空氣馬達予以旋轉之鐘形杯1 2 -8- 200900157 。塗料被供應至鐘形杯1 2的中心部分，於鐘形杯1 2的內 面中被傳達並往徑向外側移動後，從鐘形杯1 2的外周緣 l2a被噴出。圖中，L如上述般’係表示鐘形杯12的旋轉 軸線，箭頭A係表示鐘形杯1 2的旋轉方向。 於較鐘形杯1 2的外周緣1 2 a更後方，係設置有成形 空氣（shaping air )吐出口 1及圖案控制空氣吐出口 3。 於第4圖中，參照圖號1 3爲成形空氣用的環狀空間，i 4 爲圖案控制空氣用的環狀空間。成形空氣用環狀空間i 3 及圖案控制空氣用環狀空間1 4係形成於裝置主體丨丨的前 端部。加壓空氣從第一空氣源1 6通過第一空氣供應路i 5 供應至成形空氣用環狀空間1 3。另一方面，加壓空氣從第 二空氣源18通過第二空氣供應路17供應至圖案控制空氣 用環狀空間1 4。此外’如之後變形例所說明般，第一空氣 源16及第二空氣源18可爲共通的空氣源22(例如第5圖 )。 於第一空氣供應路15及第二空氣供應路17，分別中 介安裝有第一控制閥19及第二控制閥20，此第一、第二 控制閥1 9、2 0係由從控制盤21所傳來之訊號所控制，以 調整供應至成形空氣用環狀空間1 3及圖案控制空氣用環 狀空間1 4之空氣量。 形成於裝置主體U的端面之成形空氣吐出口 1及形 成於其外周側之圖案控制空氣吐出口 3，如參照第1圖所 說明般，該吐出方向係往鐘形杯1 2的旋轉軸線L周圍傾 斜（第1圖的α、/3 )。此外，如參照第1圖所說明般， -9- 200900157 成形空氣吐出口 1係由被排列配置在以鐘形杯1 2的旋轉 軸線L爲中心之圓周上之複數個孔，於圖式的例子中爲數 量較多的小孔所構成。圖案控制空氣吐出口 3係由被排列 配置在直徑較成形空氣吐出口 1的圓周（第1圖的圖號2 )還大之圓周（第1圖的圖號4)上之複數個孔，於圖式 的例子中爲數量較多的小孔所構成。 成形空氣吐出口 1及圖案控制空氣吐出口 3，亦可往 與鐘形杯1 2的旋轉方向A爲同一方向傾斜，但較理想爲 如第1圖所示般，往與鐘形杯12的旋轉方向A相反之方 向傾斜。此外，如參照第1圖所說明般，成形空氣吐出口 1的傾斜角α之絕對値，係設定爲較圖案控制空氣吐出口 3的傾斜角Θ之絕對値還小。換言之，圖案控制空氣吐出 口 3的傾斜角卢之絕對値，係設定爲較成形空氣吐出口 1 的傾斜角α之絕對値還大（丨/3 | >丨α丨）。 於此第1實施例中，從第4圖中可理解般，成形空氣 吐出口 1及圖案控制空氣吐出口 3的指向方向，均與鐘形 杯12的旋轉軸線L平行，此外，成形空氣吐出口 1係朝 向鐘形杯1 2的外周緣1 2 a指向。藉此，從成形空氣吐出 口 1所吐出之成形空氣，不僅具有朝向配置於鐘形杯1 2 的前方之被塗裝物（圖中未顯示）將塗料予以噴霧之功能 ，亦即藉由成形空氣使塗料朝向被塗裝物行進，並且具有 可將從鐘形杯12的外周緣12a所噴出之液體塗料予以微 粒化之功能。 此第1實施例之旋轉式靜電塗裝裝置1 〇，較理想係適 -10- 200900157 用於液體塗料，尤其適用於汽車車體的金屬塗料。於進行 汽車車體的塗裝時’係執行第一、第二控制閥19、2〇的 控制，調整塗裝圖案寬度以形成適合於車頂等之相對較寬 的塗裝處或車柱般之相對較窄的塗裝處之塗裝圖案寬度， 藉此可降低尤其在車柱般之相對較窄的塗裝處所產生之過 量噴霧。 第1變形例（第5圖）·· 上述第1實施例之旋轉式靜電塗裝裝置10，亦可構成 爲如第5圖所示之變形例的旋轉式靜電塗裝裝置30。亦即 ’於第1實施例之旋轉式靜電塗裝裝置1 〇中，係從獨立 的第一、第二空氣源1 6、1 8中，將加壓空氣供應至成形 空氣用環狀空間1 3及圖案控制空氣用環狀空間1 4而構成 ’但如第5圖所示般，亦可從共通的空氣源22中，將加 壓空氣供應至成形空氣用環狀空間1 3及圖案控制空氣用 環狀空間1 4。 於第1變形例之旋轉式靜電塗裝裝置30中，就圖案 控制空氣吐出口 3的傾斜角θ之絕對値設定爲較成形空氣 吐出口 1的傾斜角α之絕對値還大者，係與第1實施例相 同’此外’就圖案控制空氣吐出口 3的指向方向與成形空 氣吐出口 1的指向方向爲平行者，亦與上述第1實施例相 同’但就成形空氣吐出口 1朝向鐘形杯1 2的圓錐狀外周 面12b指向者’係與上述第1實施例不同。 -11 - 200900157 第2變形例（第6圖）： 於第6圖所示之第2變形例的旋轉式靜電塗裝裝置40 中，圖案控制空氣吐出口 3的指向方向係與第i變形例（ 第5圖）之旋轉式靜電塗裝裝置3〇不同，圖案控制空氣 吐出口 3的指向方向係設定爲，從成形空氣吐出口 1所吐 出之成形空氣5,與於鐘形杯12的外周緣〗2a產生偏向後 之成形空氣5的中心線平行。 第3變形例（第7圖）： 於第7圖所示之第3變形例的旋轉式靜電塗裝裝置5〇 中’就成形空氣吐出口 1的指向方向朝向鐘形杯i 2的外 周緣12a者，係與第1實施例（第4圖）爲共通，但成形 空氣吐出口 1的指向方向並非與旋轉軸線L平行，而是設 定爲對與鐘形杯12的旋轉軸線l平行之軸線L，成仰角（ + Θ ) ° 第4變形例（第8圖）·· 於第8圖所示之第4變形例的旋轉式靜電塗裝裝置6〇 中，與上述第3變形例相反’成形空氣吐出口 1的指向方 向係設定爲對與旋轉軸線L平行之軸線l，成俯角（_ 0 ) 第5變形例（第9圖）： 於第1實施例（第4圖）、第3變形例（第7圖）、 -12- 200900157 第4變形例（第8圖）中，成形空氣吐出口〗的指向方向 係設定爲成形空氣5朝向鐘形杯1 2的外周緣1 2a，但如第 5變形例的旋轉式靜電塗裝裝置70所示般，亦可使成形空 氣吐出口 1的指向方向朝向鐘形杯1 2的外周緣1 2a的附 近。 第2實施例（第1 〇圖）： 參照第2圖〜第9圖，於上述第1實施例及該變形例 中’成形空氣5係具有將從鐘形杯1 2的外周緣1 2a所噴 出之塗料朝向被塗裝物予以噴霧之功能，並且具有可將從 鐘形杯1 2的外周緣1 2a所噴出之塗料予以微粒化之功能 。然而’第10圖之第2實施例的旋轉式靜電塗裝裝置80 ，成形空氣5並不具有可將從鐘形杯12的外周緣12a所 噴出之塗料予以微粒化之功能，而僅具有使塗料朝向被塗 裝物之功能。於此第2實施例的旋轉式靜電塗裝裝置8〇 中，此成形空氣吐出口 1及圖案控制空氣吐出口 3，亦可 往與鐘形杯1 2的旋轉方向A爲同一方向傾斜，但較理想 爲往與鐘形杯1 2的旋轉方向A相反之方向傾斜。此外， 如參照第1圖所說明般，圖案控制空氣吐出口 3的傾斜角 /5之絕對値，係設定爲較成形空氣吐出口 1的傾斜角α之 絕對値還大（丨/3 | > | α丨）。 於此第2實施例的旋轉式靜電塗裝裝置80中，可藉 由位於以螺旋狀旋轉之成形空氣5的外周側且與成形空氣 5爲相同方向旋轉之圖案控制空氣6的相對空氣量之增減 -13- 200900157 ’以及成形空氣5的空氣量之增減，而將塗裝圖案寬度控 制爲可變’此點係與上述第1實施例相同。 【圖式簡單說明】 第1圖係顯示本發明之基本槪念圖。 第2圖係顯示第1實施例之靜電塗裝裝置的說明圖， 爲從斜向前方觀看該前端部之立體圖。 第3圖係顯示與第2圖相同之第1實施例之靜電塗裝 裝置的說明圖，爲該前端部之側面圖。 第4圖係顯示與第2圖相同之第1實施例之靜電塗裝 裝置的說明圖，爲該前端部之剖面圖。 第5圖係顯示用以說明第1變形例之圖式，爲對應於 第4圖之剖面圖。 第6圖係顯示用以說明第2變形例之圖式，爲對應於 第4圖之剖面圖。 第7圖係顯示用以說明第3變形例之圖式，爲對應於 第4圖之剖面圖。 第8圖係顯示用以說明第4變形例之圖式，爲對應於 第4圖之剖面圖。 第9圖係顯示用以說明第5變形例之圖式，爲對應於 第4圖之剖面圖。 第1 0圖係顯示用以說明第2實施例之圖式，爲對應 於第4圖之剖面圖。 -14- 200900157 【主要元件符號說明】 L :旋轉頭的旋轉軸線 A :旋轉頭的旋轉方向 1 :成形空氣吐出口 2:關於成形空氣吐出口之第1圓周 3:圖案控制空氣吐出口 4:關於圖案控制空氣吐出口之第2圓周 5 :成形空氣 6 :圖案控制空氣 -15-200900157 IX. Description of the Invention [Technical Field of the Invention] The present invention relates to a rotary electrostatic coating apparatus. [Prior Art] The electrostatic coating technique is to electrostatically adsorb the microparticulated coating material to the object to be coated (workpiece). For the device for realizing this technology, it is known to have a rotating head (generally called Rotary electrostatic coating device for "bell cup". Rotary electrostatic coating devices of this type are suitable for powder coatings, insulating liquid coatings (such as oil-based coatings), and conductive liquid coatings (such as water-based coatings). For example, in the case of an electrostatic coating device for an insulating coating, a method of applying a high voltage to a rotating head to charge a coating is typically employed. Further, in the case of an electrostatic coating device for a conductive paint, a method of applying a high voltage to an external electrode provided on the outside of the coating device to charge the coating material is employed. In order to direct the paint toward the object to be coated, the rotary electrostatic coating apparatus uses shaping air. Patent Document 1 points out that when the amount of formed air is increased, the width of the coating pattern is reduced. In order to improve this problem, it is proposed to obliquely discharge the molding air to the periphery of the rotation axis ' of the rotary head. Here, a detailed description thereof will be omitted by citing Patent Document 1. However, as the width of the coating pattern becomes smaller as the amount of molding air increases, the negative pressure generated in the front region of the rotary head is the cause, due to the negative pressure. The shaping air is brought closer to the inside, resulting in a smaller coating pattern width. In order to solve this problem, the invention disclosed in Patent Document 1 proposes -4-200900157, that is, the forming air is discharged in an oblique direction around the rotation axis of the rotary head, thereby forming a forming air of a spiral airflow, and The centrifugal force formed by the spiral flow reduces the influence of the negative pressure or cancels the influence of the negative pressure to expand the width of the coating pattern. In the invention of the patent document 1, when a metal coating such as an aluminum sheet or mica is used in a rotary electrostatic coating apparatus, the amount of molding air is increased in order to improve the processing quality (brightness) of the metal coating. To be effective. Patent Document 2 discloses the following problem. According to the rotary electrostatic coating apparatus according to the invention of the above Patent Document 1, when the width of the coating pattern is fixed, for example, when a portion having a narrow width such as a pillar of a car is coated, Problems such as excessive spray formation resulting in loss of paint, and the like, have been proposed to improve the problem. Specifically, Patent Document 2 proposes to discharge the second molding air to the method of discharging the molding air (first molding air) around the rotation axis of the rotary head in the oblique direction as proposed in Patent Document 1. The outer peripheral side 'and the second molding air collide with the first molding air, thereby reducing the width of the coating pattern. Patent Document 3 is not as a patent document! 2. The shaping air is obliquely discharged to the periphery of the rotation axis of the rotary head, and it is proposed to discharge the shaping air toward the conical outer circumferential surface of the rotary head and to discharge the pattern control air to the outer circumferential side of the molding air. The pattern control air collides with the shaping air, thereby reducing the width of the coating pattern. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. The object of the invention is to improve the width of the coating pattern when the molding air is obliquely discharged around the rotation axis of the rotary head as disclosed in Patent Document 1. Another object of the present invention is to provide a rotary electrostatic coating apparatus which can change the width of a coating pattern. (Means for Solving the Problem) The above-described technical problem can be achieved by providing a rotary electrostatic coating apparatus which has a rotary head which scatters a coating material radially outward, according to the present invention. Further, the rotary electrostatic coating device that sprays the paint discharged from the outer periphery of the rotary head toward the object to be coated by molding air is characterized in that the molding air is inclined around the rotation axis of the rotary head. Discharging; on the outer peripheral side of the molding air, the pattern control air is discharged adjacent to the molding air; the pattern control air is oriented in the same direction as the discharge direction of the molding air, and is inclined around the axis of the rotary head The absolute value of the inclination angle (々) of the above-mentioned pattern control air is larger than the absolute value of the inclination angle (α) of the above-mentioned shaping air. Fig. 1 is a view showing a constitutional structure of the present invention, in which the reference axis L indicates the rotation axis of the rotary head. The forming air discharge port 1 is composed of a plurality of holes arranged on the first circumference 2 centering on the rotation axis L of the rotary head by -6-200900157. The outer circumference side of the first circumference 2 is provided with a pattern control air discharge port 3'. The pattern control air discharge port 3 is a plurality of holes arranged on the second circumference 4 concentric with the first circumference 2 Composition. In the figure, 'arrow A' indicates the direction of rotation of the rotary head. The molding air 5' discharged from the forming air discharge port 1 inclined around the rotation axis L is indicated by a broken line in Fig. 1 to form a first spiral airflow. On the outer peripheral side of the spiral airflow of the forming air 5, a spiral airflow of the pattern control air 6 discharged from the pattern control air discharge port 3 is formed. As described in the description of the prior art of Patent Document 1, as the amount of the molding air 5 increases, the width of the coating pattern tends to decrease due to the negative pressure generated in the front region of the rotary head. However, the centrifugal force generated by the spiral air flow of the shaping air 5 can reduce the influence of the negative pressure or cancel the negative pressure to expand the width of the coating pattern. Further, on the outer peripheral side of the spiral airflow of the forming air 5, a spiral airflow swirling around the pattern control air 6 in the same direction is formed, and the inclination angle of the air discharge port 3 is controlled by the pattern/3 Absolutely, it is set to be larger than the absolute 値 of the inclination angle α of the shaping air 5, and the degree of winding of the pattern control air 6 is increased, whereby the centrifugal force of the shaping air 5 can be increased, and the coating pattern can be further enlarged by the growth. width. Then, the amount of pattern control air is relatively increased or decreased in relation to the amount of the shaping air 5, whereby the coating pattern width is controlled to be variable. Of course, the width of the coating pattern can be changed by increasing or decreasing the amount of air of the forming air 5. Therefore, in the present invention, the coating pattern width can be controlled to be controllable by controlling the amount of air of the forming air 20095, the amount of air of the pattern control air 6, and the relative amount of air of the pattern control air 6 to the shaping air 5. change. In the first embodiment, a preferred form is a winding direction in which the spiral airflow of the shaping air 5 and the pattern control air 6 which are wound in the same direction is set to be opposite to the rotation direction A of the rotary head. However, in the present invention, the winding direction of the molding air 5 and the pattern control air 6 may be the same direction as the rotation direction A of the rotary head. The rotary electrostatic coating device of the present invention is typically a painting robot widely used in the painting of an automobile body, and is coated by automatic control, and the above control is performed in accordance with the painting position of the automobile body. And the coating pattern is changed according to the width of the coating pattern, thereby reducing the waste of the coating caused by the excessive spray lock. According to the rotary electrostatic coating device of the present invention, it can be applied to various types of electrostatic coating devices suitable for liquid coatings and powder coatings, and can also be applied to various electrostatics suitable for insulating coatings and conductive coatings. Painting equipment. Of course, it is also applicable to metal liquid coatings which are suitable for increasing the amount of forming air. [Embodiment] Hereinafter, preferred embodiments of the present invention will be described based on additional drawings. First Embodiment (Fig. 2 to Fig. 4): The rotary electrostatic coating apparatus 1 of the drawings has a bell cup that is rotated by an air motor housed in the apparatus main body 1 as in the prior art. 1 2 -8- 200900157. The paint is supplied to the central portion of the bell cup 12, is conveyed in the inner surface of the bell cup 12, and is moved radially outward, and is ejected from the outer periphery l2a of the bell cup 12. In the figure, L is the rotation axis of the bell cup 12 as described above, and the arrow A indicates the rotation direction of the bell cup 12. A shaping air discharge port 1 and a pattern control air discharge port 3 are provided behind the outer peripheral edge 12 a of the bell cup 1 2 . In Fig. 4, reference numeral 13 is an annular space for forming air, and i 4 is an annular space for pattern control air. The annular space i 3 for forming air and the annular space 14 for pattern control air are formed in the front end portion of the apparatus main body 。. The pressurized air is supplied from the first air source 16 to the forming air annular space 13 through the first air supply path i 5 . On the other hand, pressurized air is supplied from the second air source 18 to the pattern control air annular space 14 through the second air supply path 17. Further, as explained in the following modifications, the first air source 16 and the second air source 18 may be a common air source 22 (e.g., Fig. 5). A first control valve 19 and a second control valve 20 are interposed respectively on the first air supply path 15 and the second air supply path 17, and the first and second control valves 19 and 20 are controlled by the slave control panel 21 The transmitted signal is controlled to adjust the amount of air supplied to the annular space 13 for forming air and the annular space 14 for pattern control air. The molding air discharge port 1 formed on the end surface of the apparatus main body U and the pattern control air discharge port 3 formed on the outer peripheral side thereof are connected to the rotation axis L of the bell cup 12 as described with reference to Fig. 1 . Tilt around (α, /3 in Fig. 1). Further, as described with reference to Fig. 1, the -9-200900157 shaped air discharge port 1 is composed of a plurality of holes arranged on the circumference centered on the rotation axis L of the bell cup 12, as shown in the figure. In the example, it consists of a large number of small holes. The pattern control air discharge port 3 is a plurality of holes arranged on the circumference (Fig. 4 of Fig. 1) having a diameter larger than the circumference of the forming air discharge port 1 (Fig. 2 of Fig. 1). In the example of the figure, a small number of small holes are formed. The formed air discharge port 1 and the pattern control air discharge port 3 may be inclined in the same direction as the rotation direction A of the bell cup 12, but it is preferable to move toward the bell cup 12 as shown in Fig. 1 . The direction of rotation A is inclined in the opposite direction. Further, as described with reference to Fig. 1, the absolute value of the inclination angle α of the formed air discharge port 1 is set to be smaller than the absolute value of the inclination angle Θ of the pattern control air discharge port 3. In other words, the absolute value of the inclination angle of the pattern control air discharge port 3 is set to be larger than the absolute value of the inclination angle α of the shaped air discharge port 1 (丨/3 | > 丨α丨). In the first embodiment, as can be understood from Fig. 4, the direction in which the molded air discharge port 1 and the pattern control air discharge port 3 are directed is parallel to the rotation axis L of the bell cup 12, and the formed air is spit. The outlet 1 is directed towards the outer circumference 1 2 a of the bell cup 12 . Thereby, the molding air discharged from the molding air discharge port 1 not only has a function of spraying the coating material toward the object to be coated (not shown) disposed in front of the bell cup 1 2 , that is, by forming The air advances the paint toward the object to be coated, and has a function of atomizing the liquid paint ejected from the outer periphery 12a of the bell cup 12. The rotary electrostatic coating device 1 of the first embodiment is preferably -10-200900157 for liquid coatings, and is particularly suitable for metal coatings for automobile bodies. When performing the painting of the automobile body, the control of the first and second control valves 19, 2 is performed, and the width of the coating pattern is adjusted to form a relatively wide coating or column suitable for the roof or the like. The coating pattern width of the relatively narrow coating is thereby reduced by excessive spray generated particularly at the relatively narrow coating of the pillar. First Modification (Fig. 5) The rotary electrostatic coating device 10 of the first embodiment described above may be configured as a rotary electrostatic coating device 30 according to a modification shown in Fig. 5. That is, in the rotary electrostatic coating apparatus 1 of the first embodiment, pressurized air is supplied from the independent first and second air sources 16 and 18 to the annular space 1 for forming air. 3 and the pattern control air is formed by the annular space 14". However, as shown in Fig. 5, pressurized air may be supplied from the common air source 22 to the annular space 13 for forming air and pattern control. The annular space for air is 1 4 . In the rotary electrostatic coating device 30 according to the first modification, the absolute value of the inclination angle θ of the pattern control air discharge port 3 is set to be larger than the absolute value of the inclination angle α of the molded air discharge port 1 . In the same manner as in the first embodiment, the direction in which the pattern control air discharge port 3 is directed is parallel to the direction in which the molding air discharge port 1 is directed, and is also the same as in the above-described first embodiment, but the air discharge port 1 is formed toward the bell shape. The conical outer peripheral surface 12b of the cup 12 is different from the above-described first embodiment. -11 - 200900157 Second modification (Fig. 6): In the rotary electrostatic coating device 40 of the second modification shown in Fig. 6, the pattern is controlled by the direction of the air discharge port 3 and the ith modification. (Fig. 5) The rotary electrostatic coating apparatus 3 is different in that the direction in which the pattern control air discharge port 3 is directed is set to the molding air 5 discharged from the molding air discharge port 1 and the outer circumference of the bell cup 12. The edge line 2a produces a center line parallel to the shaping air 5 which is deflected. Third modification (Fig. 7): In the rotary electrostatic coating apparatus 5 of the third modification shown in Fig. 7, the direction of the shaping air discharge port 1 is toward the outer circumference of the bell cup i 2 . 12a is common to the first embodiment (Fig. 4), but the direction in which the shaping air discharge port 1 is directed is not parallel to the rotation axis L, but is set to an axis parallel to the rotation axis l of the bell cup 12. L, the elevation angle (+ Θ ) ° The fourth modification (Fig. 8) is the reverse of the third modification example in the rotary electrostatic coating device 6 of the fourth modification shown in Fig. 8 The pointing direction of the forming air discharge port 1 is set to the axis l parallel to the rotation axis L, and is formed at a depression angle (_0). Fifth modification (Fig. 9): In the first embodiment (fourth diagram), the third Modification (Fig. 7), -12-200900157 In the fourth modification (Fig. 8), the direction of the shaping air discharge port is set such that the molding air 5 faces the outer periphery 12a of the bell cup 12, but As shown in the rotary electrostatic coating device 70 of the fifth modification, the pointing direction of the molding air discharge port 1 may be directed toward the bell shape. The outer peripheral edge 12 is near 1 2a. Second Embodiment (Fig. 1): Referring to Figs. 2 to 9 , in the first embodiment and the modification, the molding air 5 has a peripheral edge 1 2a from the bell cup 1 2 . The discharged paint is sprayed toward the object to be coated, and has a function of atomizing the paint discharged from the outer periphery 12a of the bell cup 12. However, in the rotary electrostatic coating device 80 of the second embodiment of Fig. 10, the molding air 5 does not have a function of atomizing the coating material discharged from the outer peripheral edge 12a of the bell cup 12, but only has a function of The coating is oriented towards the object being coated. In the rotary electrostatic coating apparatus 8 of the second embodiment, the molded air discharge port 1 and the pattern control air discharge port 3 may be inclined in the same direction as the rotation direction A of the bell cup 12, but It is preferable to be inclined in a direction opposite to the rotation direction A of the bell cup 12. Further, as described with reference to Fig. 1, the absolute value of the inclination angle /5 of the pattern control air discharge port 3 is set to be larger than the absolute value of the inclination angle α of the formed air discharge port 1 (丨/3 | ; | α丨). In the rotary electrostatic coating device 80 of the second embodiment, the relative air amount of the air 6 can be controlled by a pattern that is located on the outer peripheral side of the molding air 5 that is spirally rotated and rotates in the same direction as the molding air 5 . The increase or decrease of -13, 200900157' and the increase or decrease of the amount of air of the molding air 5, and the control of the width of the coating pattern are variable" is the same as that of the first embodiment described above. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the basic concept of the present invention. Fig. 2 is an explanatory view showing the electrostatic coating apparatus of the first embodiment, and is a perspective view of the front end portion viewed obliquely from the front. Fig. 3 is an explanatory view showing an electrostatic coating apparatus according to a first embodiment, which is the same as Fig. 2, and is a side view of the front end portion. Fig. 4 is an explanatory view showing an electrostatic coating apparatus according to a first embodiment, which is the same as Fig. 2, and is a cross-sectional view of the tip end portion. Fig. 5 is a cross-sectional view corresponding to Fig. 4 for explaining a first modification. Fig. 6 is a cross-sectional view corresponding to Fig. 4 for explaining a second modification. Fig. 7 is a cross-sectional view corresponding to Fig. 4, showing a diagram for explaining a third modification. Fig. 8 is a cross-sectional view corresponding to Fig. 4, showing a diagram for explaining a fourth modification. Fig. 9 is a cross-sectional view corresponding to Fig. 4, showing a diagram for explaining a fifth modification. Fig. 10 is a cross-sectional view corresponding to Fig. 4 for explaining the drawing of the second embodiment. -14- 200900157 [Description of main component symbols] L: Rotation axis A of the rotary head: Rotation direction of the rotary head 1: Formed air discharge port 2: First circumference 3 with respect to the shaping air discharge port: Pattern control air discharge port 4: Regarding the pattern control air discharge port 2nd circumference 5: shaping air 6: pattern control air-15-