M435968 五、新型說明： 【新型所屬之技術領域】 特別是指一種用於夹 本新型是有關於一種夾固裝置 固加工工具之加工機的夾固裝置。 【先前技術】 圖1及圖2是以往用於夹固_支加卫卫具17的央_ 置，包含：一個夾頭H、一個筒夾12，及—個螺帽Η。M435968 V. New description: [New technical field] It is especially used for clamping. This new type is a clamping device for a processing machine for a clamping device. [Prior Art] Figs. 1 and 2 are conventionally used for clamping the yoke guards, and include: a collet H, a collet 12, and a nut Η.
該夾頭η包括-個環繞一條中央軸線14的夹固壁⑴ 。該夾㈣⑴具有一個内壁面112，及—個外壁面113。 該内壁面112具有-個位於底段且逐漸往下擴大的錐導部 m。該外壁113則形成多數位於底段的外螺紋115。 該筒夹12是安裝於該夾頭u且用於夹固該加工工具 π的t空筒體’並包括—個卡嵌於該内壁面ιΐ2且位於該 錐導部114上方的直導面121、—個位於該直導面⑵下方 且配合該錐導部114的錐度之錐導面122、_個位於該錐導 面122下㈣延伸面123 ’以及數條内外連通地形成於該錐 導面122及延伸面123的剖溝124，每兩條剖溝124間形成 -個夹持該加卫卫具17的夾爪125，該錐導面122及延伸 面123間形成一個肩部126。 該螺帽13是螺接於該夾頭n且頂抵該筒夾12，以使 該筒夾12限位於該夹頭u，並包括一個頂推該肩部126的 底壁131’及一個自該底壁131往上延伸的鎖接壁132。該 底壁131具有一個可容該延伸面】23穿過的開口 ！ 33。該鎖 接壁132位於該外壁自113料側，並具有多數對應螺接於 3 M435968 所述外螺紋115的内螺紋134。 以往的夾固裝置在組裝時，先將該加工工具17放入該 筒夾12的夾爪125之間，再將該筒失12連同該加工工具 17 —起置入該夾頭11内，然後將該螺帽13由下往上套設 於該夾頭11，旋轉該螺帽13以使該底壁131向上擠推該筒 夾12的肩部126，此時該内壁面112的錐導部丨14會壓抵 該筒失12的錐導面122，並使所述夾爪125的底緣往該中 央軸線14的方向束縮，而能相配合地碰觸並夾抵該加工工 具17。 但是，該夾頭11的錐導部114之錐度，必須與該筒夾 12的錐導面122之錐度恰當地配合，才能確保所述夾爪 125文該錐導部114的壓迫而可用以夾持該加工工具丨7，然 而在生產工法上，錐度製程的技術要求相當高，其生產良 率比較低且較耗費製造時間，因此這種夾固裝置的成本也 就不易降低。 此外’儘管所述夾;K 125能相配合地夾抵該加工工具 17但所述夾A 125尸、有底緣的區域能碰觸到該加工工具 17而提供夾抵的力量’所以該加工工具17受夾抵的面積其 實不大，這樣的設計對於使用中會高速轉動的該加工工具 來說穩定性並不夠，容易在使用一段時間後即產生鬆 脫、不穩定的現象’而造成切割範圍不夠精準的缺失。 【新型内容】 因此，本新型之目的，即在提供一種易於生產製造， 而且穩定性較高之加工機的夾固裝置。 ⑧ M435968 :是’本新型加工機的夾固裳置，是安裝於該加工機 下方且用於夾固一支加工工具以使該加工工 具隨者該主轴的中& 、軸線一起灰轉。該夾固裝置包含：― 夹頭、至少-個抵固件’及-個襯體。 绩夹頭包括—個銜接在該主軸的下方且環繞該中央袖 俨的内辟…权-有個外壁面、-個具有相同截 :壁面，及數量對應於該抵固件且自該内壁面連通至 1: 卜壁面的抵固穿孔。該内壁面界限出-個可供該加工工 具飲入的安裝口。 該抵固件穿設於該抵固穿孔而迫緊該加工工具，使該 加工工具固定不動。 6Λ 該襯體安裝於該夾固壁内且抱持該加工工具 =呈：弧形’並以其兩相反面分別緊抵於該内壁面及：加 工工具。 本新型之有益功效在於：該内壁面具有相同的截徑而 不必形成錐度，生產製造上較為 „^ Α 千而且該加工工具被 緊抵夾固的面積範圍較大，使用時有更好的穩定性。 【實施方式】 有關本新型之前述及其他技術内容、特點與功效，在 以下配合參考圖式之—個較佳實施例的詳The collet η includes a clamping wall (1) surrounding a central axis 14. The clip (4) (1) has an inner wall surface 112 and an outer wall surface 113. The inner wall surface 112 has a tapered guide portion m which is located at the bottom portion and which is gradually enlarged downward. The outer wall 113 defines a plurality of external threads 115 located in the bottom section. The collet 12 is an empty tubular body mounted to the collet u and used to clamp the processing tool π and includes a straight guiding surface 121 that is embedded in the inner wall surface ι 2 and located above the tapered guiding portion 114. a taper guide surface 122 located below the straight guide surface (2) and engaging with the taper of the taper guide portion 114, a recessed guide surface 122 located under the tapered guide surface 122, and a plurality of inner and outer joints are formed in the cone guide The face 122 and the groove 124 of the extension surface 123 form a clamping jaw 125 for holding the fastener 19 between each of the two cutting grooves 124. A shoulder 126 is formed between the tapered guiding surface 122 and the extending surface 123. The nut 13 is screwed to the collet n and abuts against the collet 12 so that the collet 12 is limited to the collet u, and includes a bottom wall 131' for pushing the shoulder 126 and a self The bottom wall 131 extends upwardly to the locking wall 132. The bottom wall 131 has an opening through which the extension surface 23 can pass! 33. The locking wall 132 is located on the outer wall from the side of the material 113 and has a plurality of internal threads 134 correspondingly threaded to the external threads 115 of 3 M435968. In the conventional clamping device, the processing tool 17 is first placed between the jaws 125 of the collet 12, and then the cylinder 12 is placed together with the processing tool 17 into the collet 11, and then The nut 13 is sleeved from the bottom to the chuck 11 , and the nut 13 is rotated to push the bottom wall 131 upward to push the shoulder portion 126 of the collet 12 . At this time, the tapered portion of the inner wall surface 112 The crucible 14 will be pressed against the conical guide surface 122 of the cylinder 12 and the bottom edge of the jaw 125 will be deflected in the direction of the central axis 14 to be cooperatively contacted and clamped against the processing tool 17. However, the taper of the tapered guide portion 114 of the collet 11 must be properly matched with the taper of the tapered guide surface 122 of the collet 12 to ensure that the collet 125 is pressed against the conical guide portion 114 for use. The processing tool 丨7 is held. However, in the production method, the technical requirements of the taper process are quite high, the production yield is relatively low, and the manufacturing time is relatively expensive, so the cost of the clamping device is not easily reduced. In addition, although the clip; K 125 can be cooperatively clamped against the processing tool 17 but the clip A 125, the bottom edge region can touch the processing tool 17 to provide the force of the clamping force' The area of the tool 17 that is pinched is actually not large. Such a design is not stable enough for the processing tool that rotates at a high speed during use, and it is easy to cause looseness and instability after a period of use. The scope is not accurate enough to be missing. [New content] Therefore, the object of the present invention is to provide a clamping device for a processing machine which is easy to manufacture and has high stability. 8 M435968: is the clamping device of the new processing machine, which is installed under the processing machine and is used to clamp a processing tool to make the processing tool gray with the center & axis of the main shaft. The clamping device comprises: a "clamp, at least one fastener" and a liner. The performance chuck includes a lining that is connected below the main shaft and surrounds the central sleeve. The right side has an outer wall surface, the other has the same cut: the wall surface, and the number corresponds to the reinforcement and is connected from the inner wall surface. To 1: The piercing of the wall of the wall. The inner wall surface defines a mounting opening for the processing tool to enter. The fastener is threaded through the retaining perforation to force the processing tool to immobilize the processing tool. 6Λ The lining is installed in the slat wall and holds the processing tool = in an arc shape and abuts against the inner wall surface and the processing tool by the opposite sides thereof. The beneficial effect of the novel is that the inner wall surface has the same cross-sectional diameter without forming a taper, and the manufacturing process is relatively large, and the processing tool is tightly clamped to a larger area range, and is more stable in use. [Embodiment] The foregoing and other technical contents, features and effects of the present invention are described in detail below with reference to the preferred embodiment of the drawings.
清楚的呈現。 Τ將J 參閱圖3、圖4、圖5，本新型加工機的夹固裝置之較 實鈀例’是安裝於該加工機的一個主軸（圖 方且用於央固一支加工工具2， ） 靶使4加工工具2隨著該主 M435968 轴的中央轴線A —起旋轉’並包含：一個失頭3'兩個抵 固件4、一個襯體5,及一個環套6。本實施例的該加工工 具2是以研磨棒作為說明，但實施時也可以是其他種類的 加工工具2，例如刀具。 該夾頭3銜接在該主軸的下方，並包括一個環繞該中 央轴線A的夾固壁31。該夾固壁31具有一個外壁面310、 一個具有相同截徑的内壁面311，及兩個分別自該内壁面 311連通至該外壁面310的抵固穿孔314。該外壁面310具 有一個小外徑部312，及一個自該小外徑部312往下延伸的· 大外徑部313。所述抵固穿孔314分別為一形成於該小外徑 部3 12的螺孔。該内壁面3 11界限出一個可供該加工工具2 嵌入的安裝口 315，並於遠離所述抵固穿孔314之處設有一 個疋位槽316。本實施例的該定位槽3 16連通至該外壁面 310，但實施時不以連通為限制。該安裝口 3丨5的圓心位於 該中央軸線A。Clear presentation. ΤJ, referring to Fig. 3, Fig. 4 and Fig. 5, the solid palladium example of the clamping device of the new processing machine is mounted on a main shaft of the processing machine (the figure is used for a processing tool 2 of the central solidification machine 2). The target 4 tool 2 rotates along with the central axis A of the main M435968 shaft and includes: a head 3' two fasteners 4, a liner 5, and a collar 6. The processing tool 2 of the present embodiment is described by a grinding bar, but other types of processing tools 2 such as a tool may be used in the implementation. The collet 3 is coupled below the main shaft and includes a clamping wall 31 surrounding the central axis A. The clip wall 31 has an outer wall surface 310, an inner wall surface 311 having the same cross-sectional diameter, and two resisting perforations 314 that communicate with the outer wall surface 310 from the inner wall surface 311, respectively. The outer wall surface 310 has a small outer diameter portion 312 and a large outer diameter portion 313 extending downward from the small outer diameter portion 312. The securing through holes 314 are respectively screw holes formed in the small outer diameter portion 312. The inner wall surface 31 defines a mounting opening 315 into which the processing tool 2 can be inserted, and a clamping groove 316 is provided away from the securing through hole 314. The positioning groove 3 16 of the present embodiment communicates with the outer wall surface 310, but is not limited by the connection. The center of the mounting port 3丨5 is located at the central axis A.
本實施例的所述抵固件4是兩個螺絲，並分別對應螺 接於所述抵固穿孔314而迫緊該加工 工具2使其固定不動 ，且使該加工工具2的軸心位於該主軸的中央軸線A，透 過螺轉所述抵固件4可以調整其相對於該内㈣3ιι的位 置’而使各種尺寸的加卫工具2皆能被所述抵固件4所頂 抵边緊。本新型實施時’所述抵固穿孔314及抵固件4不 限於螺孔及螺絲，也可以其他態樣的元件呈現。 是以具有相同厚度的 ’使其橫截面呈圓弧 參閱圖4、圖5、圖6，該觀體5 金屬板體製成’並經過模具加壓彎折 ⑧ M435968 形’該概體5仅於該夾頭3内時會抱持該加工工具2且緊 抵於該内壁面3"，並以其兩相反面分別貼靠於該内壁面 311及。亥加工工具2，值得庄意的是，該襯體5的圓心角最 好大於⑽。且小於360。’因為若圓心角小於18〇。則抱持效 果不佳，若圓心角為360。則無法容許所述抵固件4穿過該 ^固壁31後接觸並迫緊該加工工具2,本實施例的圓心角 疋240。5亥襯體5並包括一個卡嵌於該定位槽316的凸出 4 51 β玄凸出°卩5丨是透過剪切該襯體5的末端並往外折壓 而形成的，能防止該襯體5相對於該内壁面311滑動，但 貫施m出51也可以其他的態樣呈現，例如用焊接或 衝壓方式於該襯體5外表面成型出一顆凸點。 该環套6之橫剖面呈具有開口的c形，其内徑略小於 該大外徑部313的截徑但對應於該小外徑部312的截徑， 可套設於該小外彳£部312 ’該環套6並包括兩個分別對應於 所述抵固件4的限位孔6G ’及遠離所述限位孔6()的一個第 一端緣61和一個第二端緣62。該第一端緣61及第二端緣 62間形成一個夾縫63。所述限位孔6〇的孔徑皆略小於所 it抵口件4的直！，藉以分別擋住所述抵固件4，使其不能 脫離該夾帛3 ’但可讓一螺絲起子得以穿過所述限位孔6〇 來調整所述抵固件4。該第一端緣61具有一個第一卡嵌部 6Π，該第二端緣62具有一個形狀配合該第一卡嵌部611 的第一卡飲部621，本實施例的該第一卡嵌部611呈凸形， 而該第一卡敗部62丨則呈凹形，兩者相配合可避免該第一 端緣61與第二端緣62彼此過度上下錯位，當然該第一卡 嵌。P 611及第一卡嵌部621也可以其他的形狀呈現，例如 '、角形該夾縫63會在該環套6受到由内往外的推擠時變 大’因而能使該環套6具有彈性。 順f 一提，本新型所述抵固件4、抵固穿孔314及限位 孔60的數目並不需以本實施例所述為限，實施時可以皆為 個一個或更多個’只要其數目一致能互相搭配即可。 本新型組裝時，先把該襯體5自該安裝口 315由下往 ^塞入該夾固壁31内，使該襯體5的凸出部51卡後於該 定位槽316後，再將該加卫工具2自該安裝口 315塞入該 夾固壁31内，然後將所述抵固件4分別穿設螺人所述抵固 穿孔314，直到所述抵固件4分別抵靠且迫緊該加工工具2 而無法繼續螺人’接著將該環套6自該大外徑部313往小 外控部312的方向套設於該夾頭3 ’因為有夹縫63的關係 所以該環套6會被該大外徑部313樓開變形而可通過該大 外徑部313 ’直到該環套6完全位於該小外徑部312時才會 回復原狀，而且該環套6會被該大賴部3U限制而不易 脫離該，頭3,此時所述限位孔6G分別對應於所述抵固件 4，该環套6能防止所述抵固件4脫離該夾頭3。 本實施例在設計時，該加工工具2的軸心、該襯體 的厚度及該内壁面311的截徑都已經過精確計算確保了 所述抵□件4迫緊該加工工具2時，該加工工具2的抽心 會位於該絲的中央⑽A，因此#該加工機的主㈣動 時，該加工工具2也會隨著該主軸的中央軸線A 一起旋轉The fastener 4 of the embodiment is two screws, and is respectively screwed to the fixing through hole 314 to press the processing tool 2 to be fixed, and the axis of the processing tool 2 is located at the spindle. The central axis A can adjust its position relative to the inner (four) 3 ι by rotating the fastener 4 to enable the various sizes of the urging tool 2 to be abutted against the fastener 4 . In the implementation of the present invention, the resisting perforations 314 and the fasteners 4 are not limited to screw holes and screws, and may be presented in other aspects. Referring to Fig. 4, Fig. 5 and Fig. 6 with the same thickness of the cross section, the body 5 is made of 'metal plate body' and is bent by the die pressure 8 M435968 shape 'the whole body 5 only The processing tool 2 is held in the chuck 3 and abuts against the inner wall surface 3", and the opposite surfaces thereof abut against the inner wall surface 311 and respectively. The processing tool 2, it is worth noting that the center angle of the lining 5 is preferably greater than (10). And less than 360. 'Because if the central angle is less than 18 inches. The effect is not good, if the central angle is 360. Therefore, the fastener 4 can not be allowed to pass through the solid wall 31 to contact and press the processing tool 2, and the central corner of the embodiment is 240. The 5 liner 5 includes a card embedded in the positioning groove 316. The protrusion 4 51 β 玄 出 卩 丨 5 丨 is formed by shearing the end of the lining 5 and folding outward, which prevents the lining 5 from sliding relative to the inner wall surface 311, but Other aspects may also be present, such as forming a bump on the outer surface of the liner 5 by welding or stamping. The collar 6 has a c-shaped cross section with an opening, the inner diameter of which is slightly smaller than the cross-sectional diameter of the large outer diameter portion 313 but corresponds to the cross-sectional diameter of the small outer diameter portion 312, and can be set on the outer outer casing. The portion 312 ′′ includes two limiting holes 6G ′ corresponding to the fasteners 4 and a first end edge 61 and a second end edge 62 away from the limiting hole 6 . A nip 63 is formed between the first end edge 61 and the second end edge 62. The aperture of the limiting hole 6〇 is slightly smaller than the straightness of the abutting member 4! Thereby, the fastener 4 is separately blocked from being disengaged from the clamp 3' but a screwdriver can be passed through the limiting hole 6A to adjust the fastener 4. The first end edge 61 has a first engaging portion 6Π, and the second end edge 62 has a first engaging portion 621 shaped to fit the first engaging portion 611. The first engaging portion of the embodiment The first yoke portion 62 is concave, and the two engaging portions can prevent the first end edge 61 and the second end edge 62 from being excessively displaced from each other. Of course, the first card is embedded. The P 611 and the first engaging portion 621 may also be presented in other shapes, for example, 'the angular shape of the nip 63 may become larger when the collar 6 is pushed from the inside to the outside', thereby enabling the loop 6 to be elastic. It should be noted that the number of the fastener 4, the securing through hole 314 and the limiting hole 60 of the present invention need not be limited to the embodiment, and may be one or more as long as it is implemented. The number can be matched with each other. In the assembly of the present invention, the lining body 5 is first inserted into the clamping wall 31 from the mounting opening 315, so that the protruding portion 51 of the lining body 5 is locked behind the positioning groove 316, and then The fastening tool 2 is inserted into the clamping wall 31 from the mounting opening 315, and then the fasteners 4 are respectively threaded by the fastening holes 314 until the fasteners 4 respectively abut and tightly The processing tool 2 cannot continue the screwing. Then, the ring sleeve 6 is sleeved from the large outer diameter portion 313 to the small outer control portion 312. The collar 3 has the relationship of the slit 63. 6 will be deformed by the large outer diameter portion 313 and can pass through the large outer diameter portion 313 ' until the loop sleeve 6 is completely located at the small outer diameter portion 312, and the loop sleeve 6 will be large. The lower portion 3U is not easily detached from the head 3, and the limiting hole 6G corresponds to the fastener 4, respectively, and the collar 6 can prevent the fastener 4 from coming off the chuck 3. In the embodiment, the axial center of the processing tool 2, the thickness of the lining body, and the cross-sectional diameter of the inner wall surface 311 have been accurately calculated to ensure that the abutting member 4 is pressed against the processing tool 2, The center of the machining tool 2 will be located at the center (10)A of the wire, so that when the main (four) of the machine moves, the machining tool 2 will also rotate with the central axis A of the spindle.
03596S 參閱圖5、圖6、圖7’欲替換不同的加工工且2時， 可先將所述抵固件4稍微旋鬆至不會頂抵該加工工具2的 狀態，再將原本的加工工具2抽離該夹頭3,並置入另一支 加工工具2於該夹頭3内，然後螺轉所述抵固件4以使盆 接觸並迫緊該加工工具2,同樣地，迫緊時該加工工具2的 軸心會位於該主軸的中央軸線A。 本新型製造時，因該夹固壁31的内壁面3ιι為直立形 狀並具有相同截徑’且該襯體5是以具有相同厚度之金屬 板體加壓而成，在生產製造方面較為簡單省時，能達到較 高的生產良率。另外，本新型使用時，因為該襯體5是以 其兩相反面分別貼靠於該内壁面311及該加工工且2,而且 所述抵固件4也分別緊抵於該加工工具2,所以該加工工具 2受到較完整的夾固，即使在高速轉動下也具有相當良好的 穩定性。 本新型實施時，該錢裝置也可以不包含該環套6，只 要確保所述抵固件4不會在使用中脫離該爽頭3即可相 對的該外壁面31〇也可不具有所述小外徑# 312及大外徑 部313而呈現相同的外徑，如此-來，在組裝上則能省略 將該環套6套設於該夾頭3的步驟，在製造上也可節省該 環套6的材料成本’以及在該外壁面31〇分別形成一個小 外徑部312及一個大外徑部313的加工成本。 综上所述，本新型加工機的夹固裝置透過該夹固壁η 及其内壁面3Π的直立設計’在製造上具備了簡單省時及 提升良率的好處’此外，藉由所述抵固件4、該襯體5及該 9 M435968 内壁面311的相互配合，能更穩固巧夾固該加工工具2，提 高了使用時的穩定性，故確實達到了本新型之目的。 惟以上所述者，僅為本新型之較佳實施例而已，告不 能以此限定本新型實施之範圍，即大凡依本新型申請^利 範圍及新型說明内容所作之簡單的等效變化與修飾7皆仍 屬本新型專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一立體分解圖，顯示以往的夾固裝置； 圖2是一剖切側視圖，說明該以往的夾固裝置組裝後 的狀態； 圖3疋一立體分解圖，顯示本新型加工機的夾固裝置 之一較佳實施例； 圖4是一類似圖3的立體分解圖，說明從後視角度觀 察該較佳實施例的組裝關係； 圖5是一剖切側視圖’說明該較佳實施例組裝後的狀 態； 圖6是一剖切俯視圖，說明該較佳實施例組裝後的狀 態；及 圖7是一類似圖6的剖切俯視圖，說明該較佳實施例 組裝後的一抵固件稍微旋鬆的狀態。 M435968 【主要元件符號說明】 A..........中央軸線 4 ..........抵固件 2 ..........加工工具 5 ..........襯體 3 ....... •…夾頭 51 "... •…凸出部 31…… —夾固壁 6…… …·環套 310 ... •…外壁面 60·.... •…限位孔 311… •…内壁面 61 ••… •…第一端緣 312… •…小外徑部 611… •…第一卡嵌部 313 ··· …大外徑部 62…… •…第二端緣 314… …抵固穿孔 621 ·· •…第二卡嵌部 315 .... …安裝口 63··.·· •…夾縫 316 ···· …·定位槽03596S Referring to Fig. 5, Fig. 6, Fig. 7', in order to replace different processors and 2, the fastener 4 can be slightly loosened to not reach the state of the processing tool 2, and then the original processing tool 2 is pulled away from the collet 3, and another processing tool 2 is placed in the collet 3, and then the fastener 4 is screwed to bring the basin into contact and press the processing tool 2, likewise, when forced The axis of the processing tool 2 will be located at the central axis A of the spindle. In the manufacturing of the present invention, since the inner wall surface 3 ι of the pleated wall 31 has an upright shape and has the same cross-diameter ' and the lining 5 is pressed by a metal plate body having the same thickness, it is simpler in manufacturing. At the time, high production yield can be achieved. In addition, when the present invention is used, since the lining 5 abuts against the inner wall surface 311 and the workpiece 2 on opposite sides thereof, and the fasteners 4 are also respectively pressed against the processing tool 2, The processing tool 2 is relatively completely clamped and has a fairly good stability even under high speed rotation. In the implementation of the present invention, the money device may not include the loop cover 6, as long as the outer wall surface 31 is not required to be separated from the wind head 3 in use. The diameter #312 and the large outer diameter portion 313 exhibit the same outer diameter, so that the assembly of the sleeve 6 can be omitted, and the sleeve can be saved in manufacturing. The material cost of 6 and the processing cost of forming a small outer diameter portion 312 and a large outer diameter portion 313 on the outer wall surface 31, respectively. In summary, the clamping device of the new processing machine has the advantages of simple time saving and improved yield through the erected design of the clamping wall η and its inner wall surface 3'. The cooperation of the firmware 4, the lining 5 and the inner wall surface 311 of the 9 M435968 can more securely clamp the processing tool 2, thereby improving the stability during use, and thus the object of the present invention is achieved. However, the above is only the preferred embodiment of the present invention, and the scope of the novel implementation is not limited thereto, that is, the simple equivalent change and modification of the novel application scope and the new description content. 7 are still within the scope of this new patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a conventional clamping device; FIG. 2 is a cross-sectional side view showing the assembled state of the conventional clamping device; FIG. A preferred embodiment of the clamping device of the present invention is shown; FIG. 4 is an exploded perspective view similar to FIG. 3, illustrating the assembled relationship of the preferred embodiment from a rear view; FIG. 5 is a cutaway side FIG. 6 is a cross-sectional plan view showing the assembled state of the preferred embodiment; and FIG. 7 is a cross-sectional plan view similar to FIG. 6 illustrating the preferred embodiment. After the assembly, the fastener is slightly loosened. M435968 [Description of main component symbols] A..........central axis 4 ..........firmation firmware 2 ..........machining tool 5 ... ....... Lining 3 ....... •... Chuck 51 "... •... Projection 31... - Clamping wall 6 ... ... · Loop 310 ... •... outer wall surface 60·.... •...restricted hole 311... •... inner wall surface 61 ••... •...first end edge 312... •...small outer diameter portion 611... •...first card fitting portion 313 · ··...large outer diameter portion 62... •...second end edge 314...buts through hole 621 ···...second card fitting portion 315 ..... mounting port 63··.··•...sack 316 ···· ...·positioning slot