1251528 (1) 玖、發明說明 【發明所屬之技術領域】 本發明是有關印刷基板加工機，將保持工具成自由旋 轉的主軸藉由台架定位於水平方向，使主軸移動到工具之 軸線方向來進行加工。 【先前技術】 第6圖是顯示習知技術印刷基板加工機中之第1主軸裝 置的要部剖面圖。 同圖中，主軸17固定於台架15。在主軸17內部，設有 省略圖示的電動機，來旋轉驅動保持於前端之鑽頭1 6。台 架15，隔著導軸承51藉由導桿52引導於上下方向。導桿52 之兩端，隔著支承板5 3固定於橫向滑塊1 1。橫向滑塊1 1， 在垂直於紙面方向自由移動。固定於台架15之螺帽54螺合 於滾珠螺旋1 3。滾珠螺旋1 3，藉由固定於橫向滑塊1 1的馬 達14來旋轉驅動。 而且，使馬達1 4動作，藉由用來旋轉驅動滾珠螺旋13 ，使台架15即鑽頭16上下移動。 第7圖是顯示習知技術印刷基板加工機中之第2主軸裝 置的要部剖面圖，與第6圖相同或同一功能則賦予同一編 號並省略其說明。 主軸1 7，藉由設於台架1 5之空氣軸承6 1定位於水平方 向，並且在上下方向自由移動。 前者的情況下，因爲可加大導桿52的剛性·所以加工 1251528 (2) 後的孔軸線成爲垂直，可加工成品質優異的孔。 使台架1 5上下移動因爲使鑽頭1 7上下動作，所以 部的重量，必須加大馬達1 4的容量。又，不能加 度。 又，後者的情況下，由於僅使主軸1 7上下移 不僅可減小馬達1 4的容量，而且可加速加工速度 因爲剛性小，所以使加工後的孔軸線傾斜，使孔 。又，因爲使用壓縮空氣，所以營運費用變高。 因此，日本特開2002 - 9629 8號公報所揭示 工具成自由旋轉的主軸，隔著由旋轉體及保持該 保持板（retainer )所構成的直線引導裝置支承 使作業效率及加工精密度提高，並且可減低營運 【發明內容】 [發明所欲解決之問題] 可是，日本特開2002 - 9629 8號公報所揭示 況下’未考慮對於用來防塵的直線引導裝置。 通常，印刷基板加工機在室溫大致固定，且 環境下所使用。又，由於加工產生的加工屑等藉 置從加工部排出到外部。可是，產生的加工屑等 排出。因此，由於加工產生的加工屑等會附著在 裝置，降低加工速度的情況。 又，由於附著的加工屑等會損傷直線引導裝 加工精密度的情況。 可是藉由 增加可動 快加工速 動，所以 。可是， 品質下降 ，將保持 旋轉體的 於台架， 費用。 的技術情 塵埃少的 由吸塵裝 不能完全 直線引_ 置，降低 1251528 (3) 本發明之目的是，解決上述習知技術的問題，提供一 種不會使加工速度下降，且容易維修檢查的印刷基板加工 機。1251528 (1) BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board processing machine in which a spindle that holds a freely rotating tool is positioned in a horizontal direction by a gantry to move the spindle to an axial direction of the tool. Processing. [Prior Art] Fig. 6 is a cross-sectional view showing the principal part of a first spindle device in a conventional printed circuit board processing machine. In the same figure, the main shaft 17 is fixed to the gantry 15. Inside the main shaft 17, an electric motor (not shown) is provided to rotationally drive the drill 16 held at the front end. The gantry 15 is guided in the vertical direction by the guide rod 52 via the guide bearing 51. Both ends of the guide rod 52 are fixed to the lateral slider 11 via the support plate 53. The horizontal slider 1 1 moves freely in the direction perpendicular to the paper. The nut 54 fixed to the gantry 15 is screwed to the ball screw 13. The ball screw 13 is rotationally driven by a motor 14 fixed to the lateral slider 11. Further, the motor 14 is operated, and the turret 15, that is, the drill 16 is moved up and down by rotating the ball screw 13 for rotation. Fig. 7 is a cross-sectional view showing a principal part of a second spindle device in a conventional printed circuit board processing machine, and the same reference numerals are given to the same reference numerals as in Fig. 6, and the description thereof will be omitted. The main shaft 17 is positioned in the horizontal direction by the air bearing 6 1 provided on the gantry 15 and is freely movable in the up and down direction. In the former case, since the rigidity of the guide rod 52 can be increased, the hole axis after the processing of 1251528 (2) is vertical, and it can be processed into a hole of excellent quality. Moving the gantry 15 up and down, because the drill bit 7 is moved up and down, the weight of the motor 14 must be increased. Also, you cannot add degrees. Further, in the latter case, since only the main shaft 17 is moved up and down, not only the capacity of the motor 14 can be reduced, but also the machining speed can be accelerated. Since the rigidity is small, the hole axis after machining is inclined to make a hole. Also, since compressed air is used, the operating cost becomes high. Therefore, the spindle which is freely rotatable as disclosed in Japanese Laid-Open Patent Publication No. 2002- 9629-8 is supported by a linear guide device including a rotating body and a retainer, thereby improving work efficiency and machining precision, and [Effects of the Invention] [Problems to be Solved by the Invention] However, the linear guide device for dust prevention is not considered in the case disclosed in Japanese Laid-Open Patent Publication No. 2002- 9629-8. Generally, a printed circuit processing machine is substantially fixed at room temperature and used in an environment. Further, machining chips and the like generated by the processing are discharged from the processing portion to the outside. However, the generated machining chips and the like are discharged. Therefore, machining chips and the like generated by the processing adhere to the device, and the processing speed is lowered. Further, the machining chips and the like adhered to each other may impair the precision of the linear guide machining. However, by increasing the speed of the movable fast machining, However, the quality is reduced and the rotator will be kept on the gantry. The technical dust is less than that of the dust-collecting device. The object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a printing that does not cause a reduction in processing speed and is easy to maintain inspection. Substrate processing machine.
[解決問題之手段] Y 爲了達成上述目的，本發明，將自由旋轉地保持工具 的主軸隔著由旋轉體及保持該旋轉體的保持板所構成的直 線引導裝置而支承於台架’將該台架定位於水平方向，並 ® 且使前述主軸移動於前述工具之軸線方向來進行加工的印 阔基板加工機，其特徵爲：在前述台架配置防塵手段，將 前述直線引導裝置從外部遮斷。 【實施方式】 [發明之實施形態] 以下，將本發明根據圖示之實施形態加以說明。 第1圖是有關本發明印刷基板加工機的斜視圖，與第6 ® 圖相同或同一功能則賦予同一編號並省略其說明。同圖中 — ，印刷基板1固定於工作台2上。工作台2將固定於工作床3 之一對直線引導裝置4上，朝前後（X )方向自由移動。馬 達5 ’將工作台2定位於X方向。 門形的橫軌7跨越工作台2固定於工作床3上。橫向滑 · 塊1 1，將固定於橫軌7之一對直線引導裝置8上，在左右（ 、）方问自由移動。馬達1 〇及滾珠螺旋9，將橫向滑塊Η定 U 7万向。 . -8- 1251528 (4) 在橫向滑塊11，固定有馬達14及台架15。在台架15, 主軸1 7自由移動地支承於上下（Z )方向。圖示省略保持 於主軸1 7之螺帽是螺合在滾珠螺旋1 3。控制裝置1 8用來控 制各部動作。 第2圖是將台架1 5沿著鑽頭1 6之旋轉軸線〇的剖面圖 。又第3圖是第2圖中的A部放大圖，第4圖是金屬板71的 平面圖。 在主軸1 7外圍，固定有將剖面形成八角形的外罩20。 在台架15，形成與外罩20相似形的孔15a。在外罩20之外 面20a及孔15a的內面15η之間，配置有直線引導裝置19。 直線引導裝置19由圓筒滾輪19a及自由旋轉地支承圓筒滾 輪1 9 a的保持板（1· e t a i n e r ) 1 9 b所構成。圓筒滾輪1 9 a，在 附加預壓的狀態下，接觸於外面2 0 a及內面1 5 n。在保持板 19b上下方向的中央固定有銷25。在對置於銷25之內面15 η ，設置溝1 5 b。溝1 5 b，軸線連通於與軸線〇平行的孔1 5 c 。在銷25和密封單元70及下蓋85之間’分別配置螺旋彈簧 21、22。螺旋彈簧21、22的規格爲一樣，彈簧定數爲k， 自由長度僅比銷25和密封單元70及下蓋85的距離Μ較長m 爲M + m。即，當主軸1 7 (即外罩2 0 )在基準位置時’螺旋 彈簧2 1、22，僅壓縮m的狀態下，分別以力量彈推銷25 ° 在台架1 5之上端配置有密封單元70。密封單元70，如 第3圖所示，由金屬板7 1、承受板7 2、軟性滑動片7 3、防 塵器74、及，上蓋75所構成。 如第4圆所示，在金屬板71，形成有內徑大致等於外 -9- 1251528 (5) 罩20之內接圓，外徑大致等於外罩2〇之外接圓圓形的機油 溝80。機油供給孔82將軸線爲中心在點對稱位置配置2個 ’連通金屬板7 1外圍側及機油溝80。在機油溝80內側之側 面形成缺口 82a、82b。缺口 82a、82b是合對於直線引導裝 置19的中心所形成，其面積從機油供給孔82遠離因此形成 很大（即，缺口 82b面積比缺口 82a面積更大）。金屬板 7 1藉由省略圖示螺栓固定於台架1 5上端。又，在機油供給 孔8 2螺合著省略圖示的機油噴嘴。 承受板72，堵住機油溝80，並且用來防止軟性滑動片 73的變形。在承受板72之內面72a及外罩20之間設有0 · 1 m m的間隙。 軟性滑動片73以油毛氈系材料所形成，預先在內部含 有機油。軟性滑動片73的內面73a形成無間隙接觸於外罩 20 ° 防塵器74譬如以氟樹脂系材料所形成，在內面74a及 外罩20之間設有間隙0 · 1mm。防塵器74用來防止軟性滑 動片73的變形，並且用來防止在軟性滑動片73之前比0 · 1 mm更大加工屑進入到台架1 5內部。 上蓋7 5，隔著省略圖示的螺栓’匯整承受板7 2、軟性 滑動片7 3、防塵器7 4固定於金屬板7 1。 在台架15下端配置下蓋85 °在下蓋85內徑側上下方向 形成2段圓周方向溝，在上段（接近外罩20側）裝著軟性 滑動片7 3，或在下段側裝著防塵器7 4 °下蓋8 5藉由省略圖 示的螺栓固定於台架15下端。在下蓋85上靣形成有機油積 -10- 1251528 (6) 存部8 5 a。 在外罩20側面，形成有定位孔90。在定位孔90外側， 形成有螺釘孔9 1。 螺釘孔91，在內部螺合保持過濾器92的過濾器單元93 〇 其次，對於將直線引導裝置19及外罩20組裝於台架15 的順序加以說明。此外，預先在台架1 5固定下蓋85放著。 如第5圖所示，在定位孔90插入定位桿1〇〇 ’在這種狀 態下，將直線引導裝置19使下端19a抵接於定位桿100之前 插入孔1 5 a。 其次，使外罩20下端抵接於最上段的圓筒滾輪19a， 在這種狀態下，將定位桿100從定位孔90拔出。於是，外 罩20—邊引導於直線引導裝置19，一邊與直線引導裝置19 同時對於台架15定位於適當位置。將直線引導裝置19上端 比外罩20上端更低的狀態下，將密封單元70固定於台架1 5 。又，使過濾器單元9 3螺合於螺釘孔9 1。 其次，將本實施形態的動作加以說明。 藉由馬達使滾珠螺旋13旋轉，則外罩20對於台架15移 動於上下方向。當下降外罩20時，附著於外罩20外圍的加 工屑等之中，大的加工屑藉由防塵器74被除去。又，藉由 防塵器7 4被除去的加工屑等，藉由軟性滑動片7 3確實除去 ，不會進入到台架1 5內部。 又，夾在外罩20及下蓋85之間的空間內空氣，通過溝 】5b，通過定位孔90及過濾器單元93排出到台架15外部， -11 - 1251528 (7) 所以不會降低外罩20的移動速度。 又，使外罩20上昇，則附著於外罩20外圍的加工屑等 之中，大的加工屑藉由配置於下蓋的防塵器74被除去。又 ，藉由防塵器74被除去的加工屑等，藉由軟性滑動片73確 實除去，不會進入到台架15內部。 又，夾在外罩20及密封單元70之間的空間內是成爲負 壓，但通過定位孔90及過濾器單元93外部的空氣供給到台 架15內部，所以不會降低外罩20的移動速度。而且，供給 到台架1 5內部的空氣，通過過濾器單元93供給到台架1 5內 部，所以加工屑等不會進入到台架1 5內部。 可是，使外罩20 (即主軸17 )從基準位置僅移動L距 離到下方，則直線引導裝置19僅移動L / 2距離到下方。 如眾所周知，由圓筒滾輪19a及保持板19b所構成直 線引導裝置19的情況下，重複移動，則對於外罩20或台架 1 5會使直線引導裝置1 9位置偏移。 即，當使主軸17僅移動L距離時，若不使圓筒滾輪 1 9a及外面1 7a或內面1 5n之間滑動的話，則保持板僅移動 L / 2距離，但實際上因爲產生微小的滑動，所以通常’在 重複移動之中形成顯著的滑動。 可是，本實施形態，因爲如以下的動作，所以直線引 導裝置1 9的位置不會偏移。 即，現在，在圓筒滾輪19a及外面17a或內面15η之間 產生△ ζ距離的滑動，則直線引導裝置19對於外罩2〇僅在 圖下方滑動△ ζ距離。這種情況下，彈簧22以k ( m + Δ ζ -12- 1251528 (8) )力量將銷25彈推於上方。其中一方，彈簧21由於會延伸 ，所以以k ( m + △ z )力量將銷25彈推於下方。這樣結 果，銷25以2kA z力量彈推於上方，直線引導裝置19返回 到基準位置，則銷25返回到當初位置。 如以上說明，直線引導裝置1 9修正每次返回到基準位 置的位置，對於外罩20及台架15不會產生滑動。 本實施形態，兼用用來定位直線引導裝置1 9的定位孔 9 0及抽氣孔，所以可減少加工之孔數。 又，設置定位孔90，所以譬如使用者交換直線引導裝 置1 9的情況下，可確實且容易進行作業。 進而，在金屬板71設置機油溝80，通過缺口 82a、82b 來供給機油到直線引導裝置1 9內，所以對於直線引導裝置 1 9數遠少於機油供給部位，，容易維修作業。 此外，將抽氣孔不與定位孔90共用，所以亦可設於其 他位置。 [發明效果] 如以上說明，若依據本發明，則將自由旋轉地保持工 具的主軸隔著由旋轉體及保持該旋轉體的保持板所構成直 線引導裝置使支承於台架，將該台架定位於水平方向，並 且使前述主軸移動於前述工具的軸線方向進行加工的印刷 基板加工機中，在前述台架配置防塵手段，並將前述直線 引導裝置從外部遮斷，所以不會使加工速度降低。又，容 易維修檢查。 -13- 1251528 Ο) 【圖面之簡單說明】 第1圖是有關本發明印刷基板加工機的斜視圖。 第2圖是將台架1 5沿著鑽頭1 6的旋轉軸線〇之剖面圖 〇 第3圖是第2圖中的A部放大圖。 第4圖是金屬板71的平面圖。 第5圖是將直線引導裝置19及外罩20組裝於台架15丨噴 序的說明圖。 第6圖是前先技術的說明圖。 第7圖是前先技術的說明圖。[Means for Solving the Problem] In order to achieve the above object, the present invention supports a main shaft of a tool that is rotatably held by a linear guide device including a rotating body and a holding plate that holds the rotating body. An embossed substrate processing machine in which the gantry is positioned in a horizontal direction and the spindle is moved in the axial direction of the tool, wherein a dustproof means is disposed on the gantry, and the linear guiding device is shielded from the outside. Broken. [Embodiment] [Embodiment of the Invention] Hereinafter, the present invention will be described based on the embodiments shown in the drawings. 1 is a perspective view of a printed circuit board processing machine according to the present invention, and the same or equivalent functions as those of the sixth embodiment are denoted by the same reference numerals, and the description thereof will be omitted. In the same figure, the printed circuit board 1 is fixed to the work table 2. The table 2 will be fixed to one of the pair of working machines 3 on the linear guide device 4, and is free to move in the front and rear (X) directions. The motor 5' positions the table 2 in the X direction. A gate-shaped cross rail 7 is fixed to the work bed 3 across the table 2. Lateral slide · Block 1 1 will be fixed to one of the cross rails 7 on the linear guide device 8 and will move freely in the left and right ( ) directions. Motor 1 滚 and ball screw 9, set the horizontal slider to U 7 million. -8- 1251528 (4) In the lateral slider 11, the motor 14 and the gantry 15 are fixed. In the gantry 15, the main shaft 17 is movably supported in the up and down (Z) direction. The illustration omits the nut held on the spindle 17 and is screwed to the ball screw 13 . Control unit 18 is used to control the actions of the various units. Figure 2 is a cross-sectional view of the gantry 15 along the axis of rotation of the drill bit 16. 3 is an enlarged view of a portion A in Fig. 2, and Fig. 4 is a plan view of the metal plate 71. On the periphery of the main shaft 17 is fixed a cover 20 which is formed into an octagonal cross section. In the gantry 15, a hole 15a similar to the outer cover 20 is formed. A linear guide 19 is disposed between the outer surface 20a of the outer cover 20 and the inner surface 15n of the hole 15a. The linear guide device 19 is composed of a cylindrical roller 19a and a holding plate (1·e t a i n e r ) 1 9 b that rotatably supports the cylindrical roller 19a. The cylindrical roller 19 9 a is in contact with the outer surface 20 a and the inner surface 15 n in the state of additional preloading. A pin 25 is fixed to the center of the holding plate 19b in the vertical direction. A groove 15b is provided on the inner surface 15n of the pin 25. The groove 15b has an axis communicating with a hole 15c parallel to the axis 〇. The coil springs 21, 22 are disposed between the pin 25 and the sealing unit 70 and the lower cover 85, respectively. The specifications of the coil springs 21, 22 are the same, the spring number is k, and the free length is only longer than the distance between the pin 25 and the sealing unit 70 and the lower cover 85, m is M + m. That is, when the main shaft 17 (i.e., the outer cover 20) is in the reference position, the coil springs 2 1 and 22 are only compressed by m, and the power is pushed by the push pin 25 ° at the upper end of the gantry 15 respectively. . As shown in Fig. 3, the sealing unit 70 is composed of a metal plate 71, a receiving plate 7, 2, a flexible sliding piece 73, a dustproof device 74, and an upper cover 75. As shown in the fourth circle, the metal plate 71 is formed with an oil groove 80 having an inner diameter substantially equal to that of the outer -9-1252928 (5) cover 20 and an outer diameter substantially equal to the outer circumference of the outer cover 2〇. The oil supply hole 82 is disposed at a point-symmetric position centering on the outer periphery of the metal plate 7 1 and the oil groove 80. Notches 82a, 82b are formed on the inner side of the oil groove 80. The notches 82a, 82b are formed for the center of the linear guiding device 19, and the area thereof is far from the oil supply hole 82 so that it is formed large (i.e., the area of the notch 82b is larger than the area of the notch 82a). The metal plate 7 1 is fixed to the upper end of the gantry 15 by a bolt (not shown). Further, an oil nozzle (not shown) is screwed into the oil supply hole 8 2 . The receiving plate 72 blocks the oil groove 80 and serves to prevent deformation of the flexible sliding sheet 73. A gap of 0 · 1 m is provided between the inner surface 72a of the receiving plate 72 and the outer cover 20. The flexible sliding sheet 73 is formed of a felt-based material and contains organic oil in advance. The inner surface 73a of the flexible sliding sheet 73 is formed to have no gap contact with the outer cover 20°. The dustproof device 74 is formed of a fluororesin material, and a gap of 0·1 mm is provided between the inner surface 74a and the outer cover 20. The dust protector 74 serves to prevent deformation of the flexible slider 73, and serves to prevent the machining debris from entering the inside of the gantry 15 larger than 0. 1 mm before the soft slider 73. The upper cover 75 is attached to the metal plate 71 by the bolts ‘the rest of the receiving plate 7 is separated, and the soft sliding piece 7 3 and the dustproof device 7 4 are fixed. The lower cover 85 is disposed at the lower end of the gantry 15 to form two circumferential grooves in the vertical direction of the inner diameter side of the lower cover 85, and the soft sliding piece 7 3 is attached to the upper portion (close to the outer cover 20 side), or the dustproof device 7 is attached to the lower side. The lower cover 8 5 is fixed to the lower end of the gantry 15 by bolts (not shown). The organic oil is formed on the lower cover 85. -10- 1251528 (6) The storage portion 8 5 a. On the side of the outer cover 20, a positioning hole 90 is formed. A screw hole 9 1 is formed outside the positioning hole 90. The screw hole 91 is internally screwed to the filter unit 93 of the filter 92. Next, the procedure for assembling the linear guide 19 and the cover 20 to the gantry 15 will be described. Further, the lower cover 85 is fixed in the gantry 15 in advance. As shown in Fig. 5, the positioning hole 90 is inserted into the positioning rod 1''. In this state, the linear guide 19 is inserted into the hole 15a before the lower end 19a abuts against the positioning rod 100. Next, the lower end of the outer cover 20 is brought into contact with the uppermost cylindrical roller 19a, and in this state, the positioning lever 100 is pulled out from the positioning hole 90. Then, the outer cover 20 is guided to the linear guide device 19, and is positioned at an appropriate position with respect to the gantry 15 at the same time as the linear guide device 19. The sealing unit 70 is fixed to the gantry 15 in a state where the upper end of the linear guide 19 is lower than the upper end of the outer cover 20. Further, the filter unit 913 is screwed to the screw hole 9 1 . Next, the operation of this embodiment will be described. When the ball screw 13 is rotated by the motor, the outer cover 20 is moved in the vertical direction with respect to the gantry 15. When the outer cover 20 is lowered, the large machining chips are removed by the dust remover 74, among the processing chips and the like which are attached to the outer periphery of the outer cover 20. Further, the machining debris or the like removed by the dust dam 7 is reliably removed by the flexible sliding piece 713 and does not enter the inside of the gantry 15. Moreover, the air trapped in the space between the outer cover 20 and the lower cover 85 passes through the groove 5b, and is discharged to the outside of the gantry 15 through the positioning hole 90 and the filter unit 93, -11 - 1251528 (7) so that the cover is not lowered. 20 movement speed. Further, when the outer cover 20 is raised, it adheres to the machining debris or the like on the outer periphery of the outer cover 20, and the large machining waste is removed by the dustproof device 74 disposed on the lower cover. Further, the machining waste or the like removed by the dustproof device 74 is surely removed by the flexible sliding piece 73, and does not enter the inside of the gantry 15. Further, since the space between the outer cover 20 and the sealing unit 70 is a negative pressure, the air passing through the positioning hole 90 and the outside of the filter unit 93 is supplied to the inside of the gantry 15, so that the moving speed of the outer cover 20 is not lowered. Further, the air supplied to the inside of the gantry 15 is supplied to the inside of the gantry 15 through the filter unit 93, so that the machining debris or the like does not enter the inside of the gantry 15. However, when the outer cover 20 (i.e., the main shaft 17) is moved from the reference position by only L to the lower side, the linear guide 19 moves only the L/2 distance to the lower side. As is well known, when the linear guide device 19 is constituted by the cylindrical roller 19a and the holding plate 19b, the linear guide device 19 is displaced in position with respect to the cover 20 or the gantry 15. That is, when the main shaft 17 is moved by only the L distance, if the cylindrical roller 19a and the outer surface 17a or the inner surface 15n are not slid, the holding plate moves only by the L/2 distance, but actually The slip, so usually 'forms a significant slip in the repetitive movement. However, in the present embodiment, since the following operations are performed, the position of the linear guide device 19 is not shifted. That is, now, a Δ ζ distance slip occurs between the cylindrical roller 19a and the outer surface 17a or the inner surface 15n, and the linear guide 19 slides the Δ ζ distance only toward the outer cover 2 在 in the figure. In this case, the spring 22 pushes the pin 25 upward with a force of k ( m + Δ ζ -12 - 1251528 (8) ). On one of them, since the spring 21 is extended, the pin 25 is pushed downward by the force of k ( m + Δ z ). As a result, the pin 25 is pushed upward by a force of 2 kA z, the linear guide 19 returns to the reference position, and the pin 25 is returned to the original position. As described above, the linear guide device 19 corrects the position where it returns to the reference position every time, and does not cause slippage to the cover 20 and the gantry 15. In the present embodiment, the positioning hole 90 and the air vent hole for positioning the linear guide device 19 are used together, so that the number of holes to be machined can be reduced. Further, since the positioning hole 90 is provided, for example, when the user exchanges the linear guide device 19, the work can be performed reliably and easily. Further, the oil groove 80 is provided in the metal plate 71, and the oil is supplied to the linear guide device 19 through the notches 82a and 82b. Therefore, the number of the linear guide devices is much smaller than the oil supply portion, and the maintenance work is easy. Further, the air vent holes are not shared with the positioning holes 90, so they may be provided at other positions. [Effect of the Invention] As described above, according to the present invention, the main shaft of the tool that is rotatably held is supported by the gantry via a linear guide device including a rotating body and a holding plate that holds the rotating body, and the gantry is supported. In the printing substrate processing machine that is positioned in the horizontal direction and the spindle is moved in the axial direction of the tool, a dustproof means is disposed on the gantry, and the linear guiding device is blocked from the outside, so that the processing speed is not caused. reduce. Also, easy to repair and check. -13- 1251528 Ο) [Simplified description of the drawings] Fig. 1 is a perspective view showing a printed circuit board processing machine according to the present invention. Fig. 2 is a cross-sectional view of the gantry 15 along the axis of rotation of the drill 16 〇 Fig. 3 is an enlarged view of a portion A in Fig. 2. 4 is a plan view of the metal plate 71. Fig. 5 is an explanatory view showing the step of assembling the linear guide device 19 and the outer cover 20 to the gantry 15. Fig. 6 is an explanatory diagram of the prior art. Fig. 7 is an explanatory view of the prior art.
[圖號說明] 15"· 台架， 17… 主軸， 19"· 直線引導裝置 19a·· ••圓筒滾輪， 19b· ••保持板， 20"· 外罩， 70"· 密封單元， 73… 軟性滑動片， 74… 防塵器， 85… 下蓋。 -14-[Illustration number] 15"· Bench, 17... Spindle, 19"· Linear guide 19a··••Cylinder roller, 19b·•• Holding plate, 20" Cover, 70" Sealing unit, 73... Soft slide, 74... Dust protector, 85... Lower cover. -14-