200414934 玖、發明說明： 【發明所屬之技術領域3 發明領域 本發明係有關於一種使用於靜電塗裝之直流式高電壓 5 產生為，詳而言之，係有關於一種具有内建於外部帶電式 靜電塗裝用喷搶之多段倍電壓整流電路之-90kv之靜電塗 裝用直流式高電壓產生器。 C 先前 發明背景 10 在靜電塗裝中，使塗料帶電的方式，除了使塗料直接 帶電方式以外，已知的方式尚有使用藉由不直接使塗料帶 電而對設置於喷霧區域外之外部電極施加高電壓，藉此於 被塗裝物等接地電位側放電而形成電場，使塗料粒子通過 該放電域而帶電，且接著朝向被塗裝物之電力線（電場）而塗 15著的外部帶電式靜電塗裝裝置。 又，使用於靜電塗裝的塗料，係依作用效果的關係大 致分為電氣阻抗值高的溶劑型塗料與電氣阻抗值低的水系 或金屬系塗料等之高導電性塗料，其塗裝方法、裝置亦有 报大差異。 20 又，含有揮發性有機化合物之溶劑型塗料，由於近年 來的環i兄問而被要求減少使用，因此，必須轉移至水系 塗料。但，在使喷霧塗料直接帶電以提高靜電塗著效果的 h幵/下，於使用水系塗料時，可使物體帶電之高電壓通過 塗料而流向接地之塗料供給源，不但無法得到靜電效果， 5 200414934 也會產生高電壓流向塗料供給系之危險性。因此有 用使上述塗料供給系與接地側絕緣並維持高電壓以進= 裝之方法u。但是’由於塗難給系料電量: 故無法避免危險性增加。又，為了連續地進行塗裝^ 提高工業上效率’而必須導入較大的裝置等之理由使:: 性塗料及金屬性塗料等的靜電塗裝技術無法普及^ 遲沒有環境對策的原因。 遲 如上所述，可得到使用於商業上效果之靜電塗裳 搶，有上述之直接帶電方式與外部帶電式喷搶。其中，在 10主要使用於溶劑塗料之直接帶電方式的情形下，電極的帶 電電壓係由-30kV〜至-70kV，且可得到相當效果之電位差T 但由於高電壓會增加火花放電及電擊放電的危險性，及該 裝置的耐電壓強度等因素，必須盡可能地降低帶電電壓： 因此，電極之帶電電壓大多使用_50kv左右。相對於此，適 15合於使用水系塗料等的高導電性塗料之靜電塗裝的外部帶 電方式時，一般以高電位差（_70kv)呈帶電狀態。 又’直接帶電方式的電流值約在3 〇 A，而外部帶電方 式則提高至100〜120//A。因此，内建於外部帶電式噴搶之 高電壓產生器，無法避免較直接帶電方式喷搶之高電壓產 20 生器大型化。 另外，在直接帶電式及外部帶電式喷搶中，作為電壓 產生裝置的電路構造係以多段倍電壓整流電路整流高周波 電流’而構成南電壓構件係以合成樹脂絕緣材進行模塑使 之一體化。 6 200414934 例如，日本公開公報10-128168中揭示有-60kV的程 度，即，使用於直接帶電方式之程度之靜電塗裝用直流式 高電壓產生裝置，且已具體地提出將由於建於喷槍本體内 而使高電壓產生部（前述高電壓產生器）小型、輕量化。 5 另一方面，在外部帶電情形下之高電壓產生器，如曰 本公開公報7-213958所示，多數是作成使之附帶於自動塗 裝設備而驅動之自動喷槍使用。 然而，由於是供自動喷槍使用，與手提式喷槍相比， 較不需小型、輕量化，因此，仍不足以達成目的，尚有改 10 善空間。 又，如日本公開公報53-30646所揭示之外部帶電式靜 電塗裝用喷搶，於實用上，由於突出於前端的電極會破壞 操作性，且自喷搶外部進行高電壓的供給，無法解決使作 業者減輕來自高電壓電纜重量的負荷等，已考慮内建於喷 15 槍之高電壓產生器之小型、輕量化仍不充分。 如前所述，由於外部帶電方式較直接帶電方式需要施 加較高的高電壓，因而高電壓產生器本體必須大型化而有 損喷槍的操作性，因此要求該高電壓產生器必須小型、輕 量化。 20 【發明内容】 發明概要 本發明之目的係於外部帶電式靜電塗裝裝置之直流式 高電壓產生器方面，以簡單的構造得到小型、輕量之絕緣 構造。 7 200414934 本發明係為一種使用於外部帶電式靜電塗裝用喷搶之 直流式高電壓產生器，而該外部帶電式靜電塗裝用喷槍具 有喷霧化裝置，並具有與供給至該喷霧化裝置之塗料通路 分離，且於該喷霧化裝置外側設置帶電電極，又，前述直 5 流式高電壓產生器係重疊地配置昇壓變壓器與多段倍電壓 整流電路，且於長向集束並串聯地連接多數阻抗體而構成 100〜400ΜΩ之限制阻抗體，並且以絕緣性樹脂將該等昇壓 變壓器、多段倍電壓整流電路與阻抗體一體成形者。 根據上述方法，由於重疊地配置前述昇壓變前述壓器 10 與前述多段倍電壓整流電路，可縮短長向長度。又，在外 部帶電方式中，為了施加高電壓，通常必須設置多數高阻 抗，而藉由該等高阻抗集束於長向，可與前述同樣地縮短 長向長度。 又，在本發明中，將前述昇壓變壓器、多段倍電壓整 15 流電路與阻抗體收納於預定樹脂盒，並以所填充絕緣性樹 脂進行模塑使之一體化。因而，前述高電壓產生器可輕易 地藉由一體化組合，作成沒有多餘部分之緊緻形狀。 另外，本發明之另一特徵係前述阻抗體呈圓筒形。藉 此，可將阻抗體如集束筷子或柴等一般地、簡單地於一方 20 向成為一致，因此可將長向長度集合成最小限度的大小。 圖式簡單說明 第1圖為使用本發明之靜電塗裝用喷槍之截面圖。 第2圖係顯示本發明之一實施例之構成圖。 第3圖係顯示本發明之一實施例之電路圖。 8 200414934 第4圖係I員示本 ^ 月之〜實施例之外觀圖。 弟5圖為使用 本^月之靜電塗裝用喷槍之前端部的平 面圖。 【實施冷式】 5實施本發明之最佳型態 —、下係以第1圖至第5圖為基礎，說明本發明之最佳 實施例。 第1圖及第s岡总一 + 3圖係顯不一種外部帶電式靜電塗裝用喷 搶 j喷搶1係以把手2、扳機3來操作。槍身4係控制由設 10置^刖端之噴霧化裝置5噴出之塗料，並於槍身部4上方内 建冋電壓產生裔6，以供給高電壓至設置於喷搶^外侧之外 部電極7前端電極71。 、、， 二〜例中，所示之噴霧化裝置5係以壓縮空氣霧化 料之氣[噴檢，並於塗料噴嘴η周圍配置空氣罩η，期 15望，喷霧模式係藉由該空氣罩51形成，以進行被塗襄物的 ^妒、乍°亥專構造係採用廣為人知的喷搶構成，但對於 靜電塗裝而言則包含槍身部4係以絕緣材料形成。 又，前述塗料通路為了與接地側電位連接，其中塗料 喷嘴52内的針閥53為金屬，並與位於後部之前述把手2電氣 20連接。如同一般的靜電噴搶一樣，把手2具有導電性，且在 該實施例中，係使用半導電性樹脂，並在作業者以手操作 時呈接地側電位。 第2圖係顯示本發明之一實施例之高電壓產生器$，包 含低周波變壓器61、Cockcroft-Walton多段倍壓器整流電路 9 200414934 62、保護用高阻抗63係以絕緣性樹脂64注人且收納於 盒65。又，高電壓產生器6係於低電壓供給側露出輸入端^ 66,並於高電壓輸出側露出輸出端子67，其他部分則維持 電氣的絕緣強度。 5 高電壓產生器6係插入以絕緣體形成之設置於噴搶1搶 身部上方之裝卸部U，且輸入端子66、輸出端子^係與裝 卸部11内所預定之構件呈電氣地連接。 本發明之第1裝置中，昇壓變壓器62與多段倍電壓整流 電路62係如第2圖或3圖所示，由於重疊地配置成二層建 梁’故可縮短長向長度。 喷槍1由於為手提式，因而縮短如前述之長向長度對於 噴槍的操作是很重要的，根據第丨圖的實施例，高電壓產生 為6係使如二層建築之部分以位於把手2正上方。即，喷搶1 由於重心在把手2的正上方，藉由將高電壓產生器6構成為 15二層建築，如此，即使高度方向稍微延伸，亦不會損及噴 搶的操作性。 又，如第3圖或第4圖所示，將保護用高阻抗〇集束於 長向亦是因為同樣的理由考慮該噴搶的操作性。在本實施 例中如第4圖之A部所示，將圓筒形之3個阻抗體63a集合成 20束，而為了滿足易於製造、廉價且市面銷售性等條件，最 好是選擇圓筒形之阻抗體，又，由於將阻抗體63作成多數 條，故可減輕、分散每一個阻抗體的負荷。 又’根據本發明之第2裝置，係將昇壓變壓器61、多段 倍電壓整流電路62與保護用高阻抗63收納於如二層建築形 10 200414934 狀之樹脂盒65中，而由於本實施例之樹脂盒&的形狀為隨 著自前述高電壓產生部電氣地操作能源流動大的基部側 65a^至月ί』端側65b，而逐漸地減小截面積之形狀，故對 於噴搶的小型、輕量化是合理且經濟的。又，同時該形狀 5亦具有機械性的安定且堅固性。另外，樹脂盒伽基部側 65a具有開口，且於重疊地配置之昇壓變壓器μ的收納部 61a與多段倍電壓整流電路62的收納部仏之間設置間隔壁 65c，亚確實地配置後，以絕緣性樹脂進行模塑、緊緻地一 體化，因而具有確實的絕緣與可輕易地進行内建至噴槍時 10的組裝或分解時的卸下等優點。 另外’於製造時，實際上在注入絕緣性樹脂64時，係 使保護阻抗63側置於下方且直立，並堵住輸出端子67通過 的孔，同時收納多段倍電壓整流電路62、昇壓變壓器61以 進行模塑。模塑時，為了易消除氣泡，可在夾住多段倍電 15壓整流電路62與昇壓變壓器62之樹脂盒65内的間隔壁65c 上設置窗口，且可設法使樹脂的流動性更好等。 如上述’本發明之高電壓產生器的絕緣構造係為合理 且經濟之構造。因此，作為外部帶電式靜電塗裝用喷搶之 直流高電壓產生器，可以低成本確實地達成小型、輕量化， 20且在内建於噴搶時，可達到喷搶本體小型、輕量化與提升 操作性的目的。 產業上之利用領域 本發明係在所使用之靜電塗裝之實用、商業的範圍 中’作業者可安全地使用，且因小型、輕量可輕易地使用， 11 200414934 並可得到生產性、經濟性的效果，因此對於可大大改善環 境問題之水系塗料的應用與普及有所貢獻之外部帶電式靜 電塗裝用喷槍是有用的。 L圖式簡單說明3 5 第1圖為使用本發明之靜電塗裝用喷槍之截面圖。 第2圖係顯示本發明之一實施例之構成圖。 第3圖係顯示本發明之一實施例之電路圖。 第4圖係顯示本發明之一實施例之外觀圖。 第5圖為使用本發明之靜電塗裝用喷槍之前端部的平 10 面圖。 【圖式之主要元件代表符號表】 1. ·.喷槍 2., ..把手 3. ..板機 4. ..搶身部 5. ..喷霧化裝置 A部…集束63a之一部 51.. .空氣罩 52.. .塗料噴嘴 53···針閥 6.. .高電壓產生器 6a...二層建築部分 61.. .變壓器 61a、62a...收納部 62.. .整流電路 63.. .保護用高阻抗 63a...3個阻抗體 64.. .絕緣性樹脂 65.. .絕緣盒 65a...基部側 65b...前端側 65c...間隔壁 66.. .低電壓輸入端子 67.. .南電壓輸出端子 7.. .外部帶電電極 71.. .前端電極 12200414934 (1) Description of the invention: [Technical field to which the invention belongs3. Field of the invention The present invention relates to a DC-type high voltage 5 used for electrostatic painting, and in particular, it relates to a device having a built-in external charging -90kv DC type high voltage generator for electrostatic painting with multi-stage voltage rectifier circuit for electrostatic painting. C Background of the Prior Invention 10 In electrostatic coating, in addition to the method of directly charging the coating, there are known methods for using external electrodes provided outside the spray area by not directly charging the coating. A high voltage is applied to form an electric field by discharging on the ground potential side such as the object to be painted, and the paint particles are charged through the discharge field, and then the externally charged type is applied toward the power line (electric field) of the object to be painted. Electrostatic coating device. In addition, the coatings used for electrostatic coatings are roughly divided into solvent-based coatings with high electrical resistance values and water-based or metal-based coatings with low electrical resistance values based on the relationship between effects. The coating methods, The device also reported big differences. 20 In addition, solvent-based paints containing volatile organic compounds have been required to reduce their use due to environmental issues in recent years. Therefore, they must be transferred to water-based paints. However, when the spray paint is directly charged to improve the electrostatic coating effect, when using a water-based paint, the high voltage charged by the object can flow through the paint to the grounded paint supply source, not only can not obtain the electrostatic effect, 5 200414934 There is also the danger of high voltage flowing to the paint supply system. Therefore, it is useful to insulate the above-mentioned paint supply system from the ground side and maintain a high voltage. However, because of the difficulty in applying electricity to the material: the danger cannot be avoided. In addition, in order to continuously perform coatings ^ to improve industrial efficiency, the reason for the need to introduce larger equipment, etc .: :: electrostatic coatings and metallic coatings and other electrostatic coating technology can not be popularized ^ delayed environmental reasons. As mentioned above, commercially available electrostatic coatings can be obtained. There are the above direct charging methods and external charging spraying methods. Among them, in the case of 10 is mainly used in the direct charging method of solvent coating, the charging voltage of the electrode is from -30kV to -70kV, and a considerable potential difference T can be obtained. However, the high voltage will increase the spark discharge and electric shock discharge. The danger and the withstand voltage strength of the device must reduce the charged voltage as much as possible: Therefore, the charged voltage of the electrode is mostly about _50kv. On the other hand, when the external charging method suitable for electrostatic coating using highly conductive coatings such as water-based coatings is generally charged in a high potential difference (_70kv). The current value of the direct charging method is about 30 A, while the external charging method is increased to 100 ~ 120 // A. Therefore, the built-in high-voltage generator of the externally-charged spray-rush cannot avoid the larger size of the high-voltage generator than the direct-charged spray-rush. In addition, in the direct charging type and the external charging type, the circuit structure as a voltage generating device rectifies the high-frequency current by using a multi-stage voltage rectifier circuit to form a south voltage component system, which is molded and integrated with a synthetic resin insulation material. . 6 200414934 For example, in Japanese Laid-Open Publication No. 10-128168, a degree of -60 kV, that is, a direct-current high-voltage generating device for electrostatic coating to the extent that it is used in a direct charging method, has been specifically proposed to be built in a spray gun The main body makes the high-voltage generator (the high-voltage generator) compact and lightweight. 5 On the other hand, as shown in Japanese Laid-Open Publication No. 7-213958, high-voltage generators in the case of external charging are mostly used as automatic spray guns that are driven by automatic coating equipment. However, because it is used for automatic spray guns, it is less compact and lighter than portable spray guns. Therefore, it is still not enough to achieve the purpose and there is still room for improvement. In addition, as disclosed in Japanese Laid-Open Publication No. 53-30646, spray guns for externally-charged electrostatic coatings are practically impractical due to the electrodes protruding from the front end, and high-voltage supply from the spray guns outside cannot be solved. To reduce the load from the weight of high-voltage cables, etc., it has been considered that the miniaturization and weight reduction of the high-voltage generator built into the 15 gun is still insufficient. As mentioned earlier, since the external charging method requires a higher high voltage than the direct charging method, the high voltage generator body must be enlarged to impair the operability of the spray gun. Therefore, the high voltage generator must be small and light. Quantification. [Summary of the Invention] Summary of the Invention The object of the present invention is to obtain a compact and lightweight insulation structure with a simple structure in a DC high voltage generator of an externally charged electrostatic coating device. 7 200414934 The present invention is a DC-type high voltage generator for externally charged electrostatic painting spray guns. The externally charged electrostatic painting spray gun has a spraying device, and The paint path of the atomization device is separated, and a charged electrode is provided on the outside of the atomization device. In addition, the aforementioned direct-flow high-voltage generator is configured by overlapping a step-up transformer and a multi-stage voltage doubler rectifier circuit, and is bundled in a long direction. A plurality of impedance bodies are connected in series to form a limiting impedance body of 100 to 400 megaohms, and the step-up transformer, the multi-stage voltage doubler rectification circuit and the impedance body are integrally formed with an insulating resin. According to the above-mentioned method, since the step-up transformer 10 and the multi-stage voltage doubler rectification circuit are arranged overlappingly, the length in the long direction can be shortened. In the external charging method, in order to apply a high voltage, it is usually necessary to provide a large number of high impedances. By concentrating the high impedances in the long direction, the length in the long direction can be shortened in the same manner as described above. In the present invention, the step-up transformer, the multi-stage voltage multiplier circuit, and the resistor are housed in a predetermined resin box, and are molded and integrated with the filled insulating resin. Therefore, the aforementioned high-voltage generator can be easily formed into a compact shape with no unnecessary parts by integrating. In addition, another feature of the present invention is that the aforementioned impedance body has a cylindrical shape. This makes it possible to make impedance bodies such as bundled chopsticks or firewood generally uniform in one direction, so that the lengths in the longitudinal direction can be aggregated to a minimum size. Brief Description of Drawings Fig. 1 is a cross-sectional view of a spray gun for electrostatic coating using the present invention. Fig. 2 is a block diagram showing an embodiment of the present invention. FIG. 3 is a circuit diagram showing an embodiment of the present invention. 8 200414934 FIG. 4 is an external view showing the embodiment of the present invention. Brother 5 is a plan view of the front end of this month's electrostatic painting spray gun. [Implementing the cold type] 5 The best mode for implementing the present invention — The following is a description of the best embodiment of the present invention based on FIGS. 1 to 5. Figures 1 and s. 1 + 3 show a spray gun for externally charged electrostatic coating. Spray gun 1 is operated with handle 2 and trigger 3. The gun body 4 controls the paint sprayed by the spraying device 5 provided with a 10-point end, and a voltage generator 6 is built in the upper part of the gun body 4 to supply a high voltage to an external electrode provided on the outside of the spray gun ^ 7front electrode 71. In the above two examples, the spraying device 5 shown is a compressed air atomizing material gas [spray inspection, and an air cover η is arranged around the coating nozzle η, and the spray mode is based on this. The air hood 51 is formed in order to carry out the coating, and the structural system adopts a well-known spray gun structure, but for electrostatic coating, the gun body 4 is formed of an insulating material. The paint path is connected to the ground potential. The needle valve 53 in the paint nozzle 52 is made of metal and is electrically connected to the handle 2 at the rear. As with general electrostatic spraying, the handle 2 has conductivity, and in this embodiment, a semi-conductive resin is used, and it assumes a ground-side potential when the operator operates it by hand. FIG. 2 shows a high voltage generator $ according to an embodiment of the present invention, which includes a low-frequency transformer 61, a Cockcroft-Walton multi-stage voltage doubler rectifier circuit 9 200414934 62, and a protective high-impedance 63 system which is injected with an insulating resin 64. And stored in a box 65. The high-voltage generator 6 exposes the input terminal ^ 66 on the low-voltage supply side and exposes the output terminal 67 on the high-voltage output side. The other parts maintain the electrical insulation strength. 5 The high-voltage generator 6 is inserted into an attaching and detaching portion U formed by an insulator and disposed above the body of the spray gun 1 and the input terminal 66 and the output terminal ^ are electrically connected to predetermined components in the attaching and detaching portion 11. In the first device of the present invention, as shown in Fig. 2 or 3, the step-up transformer 62 and the multi-stage voltage doubler rectifying circuit 62 are arranged in a two-story building beam in an overlapping manner, thereby reducing the length in the longitudinal direction. The spray gun 1 is portable, so shortening the long length as described above is very important for the operation of the spray gun. According to the embodiment in FIG. 丨, the high-voltage generation is 6 series, so that a part of a two-story building is located on the handle 2 Directly above. That is, because the center of gravity of the spray gun 1 is directly above the handle 2, the high-voltage generator 6 is configured as a 15-story building, so that even if the height direction is slightly extended, the operability of the spray gun will not be impaired. In addition, as shown in Fig. 3 or Fig. 4, the high-impedance 0 for protection is bundled in the long direction for the same reason to consider the operability of the spray gun. In this embodiment, as shown in part A in FIG. 4, three cylindrical resistance bodies 63 a are assembled into 20 bundles. In order to meet the conditions of easy manufacture, low cost, and marketability, it is preferable to select a cylindrical shape. In addition, since the impedance body 63 is made into a plurality of strips, the load of each impedance body can be reduced and dispersed. According to the second device of the present invention, the step-up transformer 61, the multi-stage voltage doubler rectifier circuit 62, and the high-impedance 63 for protection are housed in a resin box 65 in the shape of a two-story building 10 200414934. The shape of the resin box & is a shape in which the cross-sectional area is gradually reduced as the base side 65a ^ to the end side 65b where the energy flow is electrically operated from the aforementioned high voltage generating section. Small, lightweight is reasonable and economical. The shape 5 is also mechanically stable and sturdy. In addition, the resin base 65a has an opening at the base portion side 65a, and a partition wall 65c is provided between the storage portion 61a of the step-up transformer μ and the storage portion 仏 of the multi-stage voltage rectification circuit 62, which are arranged in an overlapping manner. The insulating resin is molded and tightly integrated, so it has the advantages of reliable insulation and easy assembly and disassembly when disassembling it to the gun 10. In addition, at the time of manufacture, when the insulating resin 64 is injected, the protective impedance 63 side is placed downward and upright, and the hole through which the output terminal 67 passes is blocked. At the same time, the multi-stage voltage rectification circuit 62 and the step-up transformer are accommodated. 61 for molding. During molding, in order to easily eliminate air bubbles, a window can be provided on the partition wall 65c in the resin box 65 sandwiching the multi-stage multiplier 15-voltage rectifier circuit 62 and the step-up transformer 62, and measures can be taken to make the resin flow better. . As described above, the insulation structure of the high voltage generator of the present invention is a reasonable and economical structure. Therefore, as an externally charged electrostatic spray DC high voltage generator for electrostatic coating, it can reliably achieve small size and light weight at low cost. When built in the spray grab, it can achieve the compact, lightweight and compact spray grab body. The purpose of improving operability. Industrial application field The present invention is within the practical and commercial range of the electrostatic coating used. 'The operator can use it safely, and it can be easily used due to its small size and light weight. 11 200414934 Productivity and economy can be obtained It is useful for externally charged electrostatic spray guns that contribute to the application and spread of water-based coatings that can greatly improve environmental problems. Brief description of the L pattern 3 5 FIG. 1 is a cross-sectional view of the spray gun using the electrostatic coating of the present invention. Fig. 2 is a block diagram showing an embodiment of the present invention. FIG. 3 is a circuit diagram showing an embodiment of the present invention. FIG. 4 is an external view showing an embodiment of the present invention. Fig. 5 is a plan view of the front end portion of the electrostatic coating spray gun according to the present invention. [Representative symbol table of the main components of the drawing] 1. ·. 2. Spray gun 2 ... 3. Handle 3. .. Board machine 4. .. Body grab 5. 5. Atomizing device A ... One of the cluster 63a Section 51 .. Air hood 52 .. Paint nozzle 53 ... Needle valve 6. High voltage generator 6a ... Two-story building section 61 .. Transformer 61a, 62a ... Storage section 62. .. Rectifier circuit 63 .. High-impedance 63a for protection ... 3 impedance bodies 64 .. Insulating resin 65 .. Insulation box 65a ... Base side 65b ... Front end 65c ... Next door 66 .. Low voltage input terminal 67 .. South voltage output terminal 7 .. External live electrode 71 .. Front electrode 12