200525090 玖、發明說明： 【發明所屬之技術領域】 本發明係關於頭部具有與螺絲起子鑽錐繫合而傳遞旋 轉轉矩用的十字槽等的鑽錐嵌合槽的螺絲及螺絲起子鑽錐 暨螺絲頭部形成用衝孔機。 【先前技術】 附有十字槽的螺絲，一般係藉由十字槽螺絲起子（十字 螺旋（J I S B 4 6 3 3 ))及螺絲起子鑽錐，進行鎖緊及拆下的作 業。如此的附十字槽螺絲，其依十字型槽的轉矩傳遞效率 優良，另外，鑽錐的嵌合性、咬合性優良，因此受到廣泛 的應用。 但是，在如被淬火的攻牙螺絲或鑽孔螺絲，需要有用以 鎖緊的大推力的情況，其普通的螺絲用十字槽中鑽錐側的 咬合面的損耗劇烈，而有產生不能咬合的情況的問題。 為此，在專利文獻1中，提出利用改變十字槽之槽形狀， 以確保可進行大的轉矩傳遞，且可承受大的推力的大咬合 面的十字槽形狀。另外，專利文獻2或3還提出可取代此 種十字槽而形成特殊形成的槽。 (專利文獻1 )日本專利特開2 0 0 0 - 1 7 9 5 1 9號公報 (專利文獻2 )日本專利特開平3 - 2 9 2 4 0 7號公報 (專利文獻3 )日本特公平7 - 3 7 8 0 5號公報 【發明内容】 (發明所欲解決之問題）200525090 发明 Description of the invention: [Technical field to which the invention belongs] The present invention relates to a screw and a screwdriver drill with a drill head fitting groove, such as a cross groove, which is engaged with a screwdriver drill cone to transmit rotational torque. Cum head forming with a punch. [Prior technology] Screws with cross recesses are generally locked and removed by using a cross recessed screwdriver (cross screw (J I S B 4 6 3 3)) and a screwdriver drill. Such a cross-recessed screw is excellent in torque transmission efficiency by the cross-shaped groove, and it is also widely used because it has excellent fit and engagement properties of the drill. However, in the case where a hardened tapping screw or a drilling screw requires a large thrust force for locking, the loss of the bite surface on the drill cone side in a common cross groove for a screw is severe, and there are cases where the bite cannot be bitten. Problems of the situation. For this reason, Patent Document 1 proposes to change the groove shape of the cross groove to ensure a large torque transmission and a cross groove shape with a large engaging surface that can withstand a large thrust. In addition, Patent Document 2 or 3 proposes that a groove having a special shape can be formed instead of such a cross groove. (Patent Document 1) Japanese Patent Laid-Open No. 2 0 0-1 7 9 5 1 9 (Patent Document 2) Japanese Patent Laid-open No. 3-2 9 2 4 0 7 (Patent Document 3) Japanese Patent No. 7 -3 7 8 0 5 [Summary of the Invention] (Problems to be Solved by the Invention)
然而，專利文獻1之發明與具有4個繫止槽且規格為J I S 6 312/發明說明書(補件)/93-04/93101351 200525090 的十字槽相比，成為較規格品增寬繫止槽的外周面的寬 度，且較上述外周面的寬度縮短繫止槽的兩側面的半徑方 向的長度，而有在形成十字槽的衝孔製造上花費功夫的問 題。相同地，取代十字槽而使用特殊形狀者的專利文獻2 或3，也有在形成此等凹槽的衝孔製造上花費功夫的問題。 另外，在小螺絲、尤其是精密零件用的小螺絲的情況， 在鎖緊螺絲時，有頭部從螺絲本體旋斷而發生所謂頭部飛 落的情況。若發生該頭部飛落時，尤其是在精密零件用的 小螺絲的情況，有要取出頭部被旋斷的螺絲本體變得困難 的問題。 本發明係用以解決上述課題者，其目的在於，提供螺絲 及螺絲起子鑽錐暨螺絲頭部形成用衝孔機，其不僅形狀簡 單，且可提升轉矩傳遞效率，同時無鑽錐的嵌合性、咬合 性降低的情況，而且無頭部飛落的情況發生。 (解決問題之手段） 為達成上述目的，本發明係在沿著螺絲軸而在頭部具有 嵌合鑽錐的鑽錐嵌合槽的螺絲，其特徵為：上述鑽錐嵌合 體包含有由鑽錐嵌合槽本體部以及由連續此本體部且大致 平行於上述螺絲軸的面形成的連續面部。另外，本發明之 特徵為：在上述頭部的連續面部周圍形成加厚壁，藉由該 加厚壁的有無來辨識使用之鑽錐。又，最好以大致相同寬 度包圍鑽錐嵌合槽的方式形成加厚壁，且與鑽錐嵌合槽形 成大致相似的形狀。另外，上述連續面部的螺絲軸方向的 長度，最好為上述鑽錐嵌合槽本體部的螺絲軸方向的長度 7 312/發明說明書(補件)/93-04Λ)3101351 200525090 的5〜5 0 %。又，若低於5 %，則無法提升轉矩傳遞效率，另 外，若超過5 0 %，則製造效率降低，同時螺絲起子鑽錐的 插入時的操作性受損，因此並不希望如此。另外，上述鑽 錐嵌合槽本體部最好使用與例如習知存在的規格品（J I S Β 1 0 1 2 (螺絲用十字槽））相同的十字槽。該十字槽具有相對螺 絲軸傾斜的4條傾斜槽，此等配置為十字形。另外，也可 為此以外的十字槽，例如，還包括將十字槽的對向的繫止 槽一直線狀伸長而形成開槽者（由一字型螺絲起子鑽錐轉 動）。另外，該鑽錐嵌合槽也可取代十字槽而為對應Υ字狀 的3片翼形的螺絲起子鑽錐的Υ字槽。 另外，本發明係在沿著螺絲軸而在頭部具有嵌合鑽錐的 鑽錐嵌合槽的螺絲，其特徵為：在上述頭部設置加厚壁， 在該加厚壁形成上述鑽錐嵌合槽，該鑽錐嵌合槽包含有鑽 錐嵌合槽本體部以及由連續此本體部且相對上述螺絲軸大 致呈平行的面所形成的連續面部。 本發明之螺絲起子鑽錐，其特徵為用於附有上述鑽錐嵌 合槽的螺絲，且包含有放入上述鑽錐嵌合槽，嵌合於上述 鑽錐嵌合槽本體部的鑽錐前端部；及連續該鑽錐前端部， 且嵌合上述連續面部的連續㊂卩。另外，本發明之螺絲頭部 形成用衝孔機中，其特徵為：具.有形成上述鑽錐嵌合槽用 的突出部；及連續該突出部，且形成上述連續面部用的基 部。另外，本發明之螺絲頭部形成用衝孔機中，其特徵為： 具有形成上.述鑽錐嵌合槽用的十字形突出部；連續該十字 形突出部，且形成上述連續面部用的基部；及連續該基部， 8 3 12/發明說明窗(補件)/93-04/9310丨351 200525090 且形成上述加厚壁用的加厚壁形成槽。另外，螺絲起子鑽 錐除安裝於電動螺絲起子前端等者外，還包括一體形成於 一般手動轉動的螺絲起子前端者。 (發明效果） 根據本發明，藉由鑽錐嵌合槽本體部及連續此本體部且 相對上述螺絲軸大致呈平行的面所形成的連續面部，來形 成上述鑽錐嵌合槽，在進行螺絲的安裝及取出時，除鑽錐 嵌合槽外還介由連續面部，來傳遞轉矩，因此，可提升轉 矩傳遞效率，例如，即使在螺絲生鏽等的情況，仍可確實 轉動螺絲，而可容易拆下螺絲。另外，在為精密小螺絲的 情況，雖在螺絲鎖緊時會碰到所謂鑽錐淺觸鑽錐嵌合槽而 發生嵌合不良的情況，但如此的嵌合不良的發生已然消失。 另外，藉由將連續面部的在螺絲軸方向的長度，設為鑽 錐嵌合槽本體部的在螺絲軸方向的長度的5〜5 0 %，因此， 無損及鑽錐的插入性的情況發生，而可提高轉矩傳遞效 率。而且因為藉由該連續面部來保持鑽錐，因此可抑制螺 絲起子鑽錐欲從十字槽飛出的所謂外跑現象。 另外，在頭部的連續面部周圍形成加厚壁，藉由該加厚 壁的有無來辨識使用之鑽錐，因此，可作為兼做連續面部 的補強的辨識標1己，而無弄錯而使用通常的螺絲起子鑽錐 的情況。另外，利用設置加厚壁，使得形成於頭部的鑽錐 嵌合槽位於較螺絲本體部分的上面位置，頭部與螺絲本體 的連結部分僅該部分成為加厚壁，從而無頭部飛落的情況 發生。尤其是，在精密零件用的小螺絲中，若發生頭部飛 9 312/發明說明書(補件)/93-04/93101351 200525090 落，要取出頭部飛落的螺絲本體便成為不可能， 可避免如此的狀況。另外，藉由以大致相同寬度 嵌合槽，且與鑽錐嵌合槽相似形狀的例如十字形 厚壁，即可均勻進行連續面部的補強。 藉由使用具有進入上述鑽錐嵌合槽，嵌合於上 合槽本體部的鑽錐前端部，及連續該鑽錐前端部 上述連續面部的連續部的螺絲起子鑽錐，除鑽錐 可介由連續部從螺絲起子鑽錐將轉矩傳遞給螺絲 且確實進行螺絲的安裝及拆下。 藉由使用具有形成上述鑽錐嵌合槽用的突出部 該突出部，且形成上述連續面部用的基部的螺絲 用衝孔機，可簡單形成提升轉矩傳遞效率的螺絲 由具有形成上述鑽錐嵌合槽用的十字形突出部； 字形突出部，且形成上述連續面部用的基部；及 部，且形成上述加厚壁用的加厚壁形成槽，即可 防止外跑或頭飛落的特殊螺絲，而可使用對應此 【實施方式】 圖1為顯示本發明之附有十字槽的碟形頭小螺 圖，圖2、圖3為同剖面圖。螺絲1 0的頭部1 1 形，在該頭部1 1形成十字槽1 2。十字槽1 2係由 體部1 3及連續此且平行於螺絲軸1 4的面形成的 1 5所構成。 十字槽本體部1 3係構成為與習知的J I S規格J 用十字槽相同的形狀，具體係由J I S B 1 0 1 2所規 312/發明說明書(補件)/93-04/93101351 但本案卻 包圍鑽錐 ，形成加 述鑽錐嵌 ，且嵌合 前端部外 ，可簡單 ，及連續 頭部形成 。又，藉 連續該十 連續該基 容易辨識 的鑽錐。 絲的俯視 杉成為碟 十字槽本 連續面部 3的螺絲 定。十字 10 200525090 槽本體部1 3係以9 0度的間隔配置4條傾斜槽1 6而形成為 十字形。另外，各傾斜槽1 6具備相對螺絲軸1 4傾斜的錐 面1 6 a及兩側面1 6 b、1 6 c。 如圖2、圖3所示，連續面部1 5係由以連續十字槽本體 部1 3的各傾斜槽1 6的錐面1 6 a及兩側面1 6 b、1 6 c的方式 形成的周面1 5 a ;及兩側面1 5 b、1 5 c所構成，形成為與螺 絲軸1 4大致平行。此等各面1 5 a〜1 5 c的與螺絲軸1 4的交 叉角度為5±0. 5度，作為形成拔取斜度的錐面。該交叉角 度在0〜1 5度的範圍即可，最好為2〜7度。另外，連續面 部1 5的深度D 1，為十字槽本體部1 3的深度D 2的5〜5 0 % 的範圍，最好為8〜4 0 %的範圍，最理想為2 5〜4 0 °/◦的範圍。 本實施形態中，深度D 1為深度D 2的3 5 ± 0 . 5 %的範圍。 又，十字槽本體部1 3的尺寸，係依照所使用的螺絲的 大小尺寸，分為1號〜4號，各號的尺寸係由J I S B 1 01 2 來規定各部的尺寸。另外，十字槽1 2的長度Μ (參照圖1 ) 係由螺絲製品規格的規定所決定。 圖4 ( A )、（ Β )顯示用於上述碟形頭小螺絲的鎖緊或拆下 時的本發明的螺絲起子鑽錐。又，圖4 ( C )顯示習知的碟形 頭小螺絲5 0與螺絲起子鑽錐5 1的一例。本發明之螺絲起 子鑽錐20，具有進入上述十字槽12，嵌合於上述十字槽本 體部1 3的十字形前端部2 1 ;及連續該十字形前端部2 1， 且嵌合上述連續面部1 5的連續部2 2。 因此，在藉由螺絲起子鑽錐2 0進行碟形頭小螺絲1 0的 安裝或拆下時，當將螺絲起子鑽錐2 0放入碟形頭小螺絲 11 312/發明說明書(補件)/93-04/93101351 200525090 1 0的十字槽1 2進行轉動時，與圖4 ( C )所示習知規格品的 碟形頭螺絲5 0比較，除十字形前端部2 1與十字槽本體部 1 3間的嵌合區域S 1夕卜，如圖4 ( B )所示，藉由增加連續面 部1 5與連續部2 2的嵌合區域S 2，可從螺絲起子鑽錐2 0 將衝分的轉矩傳遞給碟形頭小螺絲1 0，可確實進行螺絲的 安裝及拆下。而且，在嵌合區域S2的嵌合係藉由與螺絲軸 大致平行的面來進行，因此可提高轉矩傳遞效率。因此， 即使在螺絲1 0生鏽的情況，藉由連續面部1 5與連續部2 2 的確實嵌合，仍可確實轉動螺絲1 〇，而可容易拆下螺絲 1 0。另夕卜，藉由連續面部1 5與連續部2 2的嵌合，附有十 字槽的碟形頭小螺絲1 0從螺絲起子鑽錐2 0脫落的情況被 消除，可提升螺絲1 0的安裝操作性。 圖5顯示十字槽形成用的衝孔機的一例。衝孔機3 0形 成為圓柱體狀，其上端面設有十字槽形成用突起3 1。該十 字槽形成用突起3 1係形成碟形頭螺絲1 0的十字槽1 2用 者，具有形成十字槽本體部1 3用的十字形前端部3 1 a ;及 連續該十字形前端部3 1 a，且形成上述連續面部1 5用的基 部 3 1 b。 該衝孔機3 0係安裝於周知的未圖示的鐵鍛機。鐵鍛機 係為加工如鋼絲的線材以製成螺絲的裝置，具備線材切斷 部、衝模、壓頭及驅動部。線材切斷部係按小螺絲形成用 長度切出線材。藉由衝模及衝壓機而於該被切出的線材（工 件）形成頭部及十字槽。於壓頭上安裝衝孔機3 0，該壓頭 藉由驅動部而相對衝模前進或後退，於工件形成頭部及十 12 3 12/發明說明書(補件)/93-04/93 101351 200525090 字槽。由镦鍛機形成十字槽的工件，係藉由未圖示的周知 的成形報裝置形成雄螺紋部。 再者，參照圖6，說明本發明之第2實施形態。又，對 與圖1至圖3所示第1實施形態相同構成的零件，賦予相 同的元件符號，並省略重複說明。在該第2實施形態的碟 形頭小螺絲6 0中，以可容易辨識通常的十字槽及本發明的 十字槽1 2，設置力。厚壁6 1。而且，利用將該加厚壁6 1的 外形，設為與十字槽的形狀相似的十字形，使頭部62的形 狀與通常者不同，即可容易辨識本發明之碟形頭小螺絲 6 0。藉此，便無錯用通常的螺絲起子鑽錐的情況。又，加 厚壁6 1的高度Η1為0. 5 m in，連續面部1 5的高度D1為 1 . 3 ni in，但此等可適宜變更。 圖7為顯示實施頭部飛落防止對策的碟形頭小螺絲的一 例，在圖7 ( A )之碟形頭螺絲6 2中，相對連續面部1 5的高 度D 1，增大加厚壁6 1的高度Η 1 ( D 1 < Η 1 )。藉此，與圖7 ( C ) 所示習知碟形頭小螺絲6 4比較，十字槽1 2的底部被抬起， 頭部6 2 a與螺絲本體6 2 b間的厚壁t 1，較習知的螺絲6 4 的厚壁t 3增厚。因此，可提高頭部6 2 a與螺絲本體6 2 b 的連結強度，可抑制頭部飛落的發生。另外，如圖7 ( A )所 示，取代藉由加厚壁的高度Η 1與連續面部的高度D 1的差， 確保頭部6 2 a與螺絲本體6 2 b間的厚壁t 1，如圖7 ( Β )所示 碟形頭小螺絲63，將頭部63a的高度H2較習知的螺絲64 的頭部高度Η 3增高，同樣也可提高頭部6 3 a與螺絲本體 6 3 b的連結強度，同樣可抑制頭部飛落的發生。又，該情 13 312/發明說明書(補件)/93-04/93101351 200525090 況也利用預先在頭部6 3 a形成小穴、缺口 、槽等的特殊螺 絲辨識標記，可容易辨識防止外跑及頭部飛落的特殊螺 絲。另外，在藉由螺絲的材質等以確保充分的轉矩的情況， 在上述圖7 ( A )、（ B )中，也可省略連續面部1 5而僅設置十 字槽本體部1 3，該情況也可抑制頭部飛落的發生。 在上述各實施形態中，以碟形頭小螺絲為例進行了說 明，但也可用於圖8所示的鍋形頭螺絲6 5或其他的各種頭 部形狀的實施。該情況也對應十字槽6 6的連續面部6 7形 成加厚壁68。又，加厚壁68的高度不一定要與連續面部 67的高度相同，也可適宜變更。 圖9至圖1 1為顯示鍋形頭小螺絲的頭部形成用衝孔機 的一例，該衝孔機7 0係形成為圓柱體狀，在其上端面7 0 a 形成有頭部形成用凹部7 1。若頭部形成用凹部7 1為鍋形 頭螺絲用者，以形成鍋形的形狀形成上述線材的前端。在 該凹部7 1的中心設置十字槽形成用突起7 2、加厚壁形成 用槽73及加厚壁外形形成用的凸部74。十字槽形成用突 起7 2與碟形頭螺絲1 0的十字槽1 2的構成相同，具有嵌合 十字槽本體部1 3的十字形前端部7 2 a ;及連續該十字形前 端部7 2 a，且嵌合上述連續面部1 5用的基部7 2 b。另外， 加厚壁形成用槽7 3係由形成加厚壁6 8用的凹部所構成。 加厚壁外形形成用凸部7 4係形成為連續於加厚壁形成用 槽7 3，藉由該凸部7 4，加厚壁6 8的外形形成為十字狀。 又，在上述各實施形態中，以小螺絲為例進行了說明， 但並不限於此等螺絲，也可應用於各種的螺絲。例如，也 14 312/發明說明書(補件)/93-04/93101351 200525090 可為木螺絲及攻絲螺絲。另外，頭部的形狀也可取代碟形 或锅形，而為圓頭、平頭、圓平頭、圓碟頭、拱頭、扁頭、 扁頭接合型、圓頭等。在製造圓頭、鍋形頭等的頭部形狀 的螺絲的情況，使用圖9至圖1 1所示的衝孔機7 0。另外， 材料只要為可用作為螺絲者即可，除各種金屬外也可為合 成樹脂等。在合成樹脂的情況，成形時可形成如上述的具 有連續面部的十字槽。另外，螺絲除本實施形態的碟形頭 小螺絲外，可應用碟形頭、圓碟頭、圓頭等的各種螺絲。 另外，即使取代由J I S所規定的十字槽本體部1 3、6 6， 對該規定以外的十字槽，利用具有上述連續面部1 5的構 成，仍可實施本發明。另外，對附設使對向的傾斜槽於一 直線上連續而可使用一字型螺絲起子的開槽的十字槽，也 可實施本發明。另外，取代十字槽而以對應Y字狀的3片 翼形的方式，將Y字槽作為鑽錐嵌合槽者，也可實施本發 明。該情況，以連續Y字槽本體的方式形成連續面部。另 外，以包圍該連續面部的方式形成加厚壁，將該加厚壁的 外形形成為與Y字槽相似，即可區別於一般的螺絲而容易 辨識用以抑制外跑或頭部飛落的特殊螺絲。 作為辨識標記的加厚壁形狀，除圖6、圖8所示外，如 圖1 2所示，還可為帶狀加厚壁8 0，該情況，藉由該加厚 壁8 0也可辨識碟形頭小螺絲8 4為特殊螺絲，並且，藉由 該加厚壁8 0補強垂直面部1 5。 【圖式簡單說明】 圖1為顯示本發明之附有十字槽的碟形頭小螺絲的俯視 15 312/發明說明書(補件)/93-04/93101351 200525090 圖。 圖2為沿著圖1中之Π — Π線所作的縱剖面圖。 圖3為沿著圖2中之m — ΙΠ線所作的橫剖面圖。 圖4 ( A )、（ B )為將顯示用於本發明之碟形頭小螺絲的鎖 緊或拆下時的螺絲起子鑽錐及碟形頭小螺絲的一部分剖開 的側視圖；圖4 ( C )為將顯示比較用的習知碟形頭小螺絲與 螺絲起子鑽錐的一部分剖開的側視圖。 圖5顯示本發明之十字槽形成用的衝孔機的一例的前視 圖。 圖6為顯示其他實施形態之碟形頭小螺絲的立體圖。 圖7 ( A )至圖7 ( C )為顯示其他實施形態之碟形頭小螺絲 的縱剖面圖。 圖8為顯示其他實施形態之鍋形頭小螺絲的立體圖。 圖9為顯示鍋形頭小螺絲的頭部形成用衝孔機的一例的 俯視圖。 圖1 0為同衝孔機的側視圖。 圖1 1為顯示同衝孔機的十字槽形成用突出部的放大前 視圖。 圖1 2顯示其他實施形態之碟形頭小螺絲，圖1 2 ( A )為俯 視圖，圖1 2 ( B )為縱剖面圖。 (元件符號說明） 10 碟形頭小螺絲 11 頭部 12 十字槽 16 312/發明說明擔(補件)/93-04/93101351 200525090 13 十字槽本體部 14 螺絲軸 15 連續面部 1 5 a 周面 15b 側面 15c 惻面 16 傾斜槽 16a 錐面 16b 側面 16c 側面 2 0 螺絲起子鑽錐 2 1 十字形前端部 22 連續部 30 衝孔機 3 1 十字槽形成用突起 3 1a 十字形前端部 3 1b 基部 50 碟形頭小螺絲 5 1 螺絲起子鑽錐 6 0 碟形頭小螺絲 6 1 加厚壁 6 2 頭部 6 2a 頭部 · 62b 螺絲本體 3 12/發明說明窗(補件)/93-04/93101351 17 200525090 63 碟 形 頭 小 螺 絲 63a 頭 部 63b 螺 絲 本 體 64 碟 形 頭 小 螺 絲 65 锅 形 頭 螺 絲 66 十 字 槽 67 連 續 面 部 68 加 厚 壁 70 頭 部 形 成 用 衝 孔機 70a 上 端 面 71 頭 部 形 成 用 凹 部 72 十 字 槽 形 成 用 突起 72a 十 字 形 前 端 部 72b 基 部 73 加 厚 壁 形 成 用 槽 7 4 加 厚 壁 外 形 形 成用凸部 80 帶 狀 加 厚 壁 81 碟 形 頭 小 螺 絲 84 碟 形 頭 小 螺 絲 D1 連 續 面 部 1 5的高度 HI 加 厚 壁 61的高度 H2 頭 部 63a 的 1¾ 度 H3 頭 部 高 度 SI 嵌 合 區 域 312/發明說明書(補件)/93-04/93101351 18 200525090 t 1 厚 壁 t 3 厚 壁 312/發明說明書(補件)/93-04/93101351 19However, the invention of Patent Document 1 has a wider locking groove than the standard groove compared with the cross groove having four retaining grooves and the specification is JIS 6 312 / Invention Specification (Supplement) / 93-04 / 93101351 200525090. The width of the outer peripheral surface is shorter than the width of the outer peripheral surface in the radial direction on both sides of the retaining groove, and there is a problem that it takes time to manufacture a punching hole forming a cross groove. Similarly, Patent Documents 2 or 3 in which a special shape is used instead of a cross groove also have a problem in that it takes time to manufacture a punching hole forming these grooves. In addition, in the case of small screws, especially small screws for precision parts, when the screws are tightened, the head may be disconnected from the screw body and the so-called head may fall off. If the head falls off, especially in the case of small screws for precision parts, there is a problem that it is difficult to remove the screw body whose head is broken off. The present invention is to solve the above-mentioned problems, and the object thereof is to provide a punch for a screw and a screwdriver drill taper and a screw head forming, which is not only simple in shape, but also can improve torque transmission efficiency, and has no drill taper The fit and occlusion are reduced, and no head fall occurs. (Means for Solving the Problem) In order to achieve the above object, the present invention relates to a screw having a drill bit fitting groove for fitting a drill bit on a head along a screw shaft, wherein the drill bit fitting body includes a drill A taper fitting groove body portion and a continuous surface portion formed by a surface that continues the body portion and is substantially parallel to the screw shaft. In addition, the present invention is characterized in that a thickened wall is formed around the continuous face of the head, and a drill cone used is identified by the presence or absence of the thickened wall. Further, it is preferable that the thickened wall is formed so as to surround the drill-fitting groove with substantially the same width, and is formed in a shape substantially similar to that of the drill-fitting groove. In addition, the length in the direction of the screw axis of the continuous surface is preferably the length in the direction of the screw axis of the main body portion of the drill-fitting groove 7 312 / Invention Manual (Supplement) / 93-04Λ) 3101351 5250 of 200525090 %. If it is less than 5%, the torque transmission efficiency cannot be improved, and if it is more than 50%, the manufacturing efficiency is reduced, and the operability at the time of insertion of the screwdriver drill is impaired, so this is not desirable. In addition, it is preferable to use the same cross groove as that of the conventional taper fitting groove main body (J I S Β 1 0 1 2 (cross groove for screws)). The cross groove has four inclined grooves inclined with respect to the screw shaft, and these are arranged in a cross shape. In addition, cross grooves other than this can also be used, for example, those that make the opposite grooves of the cross grooves extend linearly to form grooves (turned by a flat-blade screwdriver). In addition, instead of the cross groove, this drill tap fitting groove may be a Υ-shaped groove corresponding to a Υ-shaped three-wing screwdriver drill taper. In addition, the present invention relates to a screw having a drill-fitting groove for fitting a drill taper on a head along a screw shaft, wherein the head is provided with a thickened wall, and the drill is formed on the thickened wall. A fitting groove including a drill-fitting groove main body portion and a continuous surface portion formed by a surface continuing the body portion and being substantially parallel to the screw shaft. The screwdriver drill cone of the present invention is characterized by being used for a screw with the above-mentioned drill cone fitting groove, and further comprising a drill cone inserted into the above-mentioned drill cone fitting groove and fitted into the main body portion of the above-mentioned drill cone fitting groove. A front end portion; and a continuous condyle which continues the front end portion of the drill and fits the continuous surface portion. In addition, the punching machine for forming a screw head according to the present invention is characterized by having a protrusion for forming the drill-fitting groove, and a base for continuously forming the protrusion and forming the continuous face. In addition, the punching machine for forming a screw head according to the present invention is characterized by having a cross-shaped protrusion for forming the above-mentioned drill-fitting groove; the cross-shaped protrusion is continuous, and the continuous face is formed. Base; and continuous base, 8 3 12 / Explanation window (patch) / 93-04 / 9310 丨 351 200525090 and the thick wall forming groove for forming the thick wall described above. In addition, the screwdriver drill is mounted on the front end of an electric screwdriver, etc., and includes a screwdriver that is integrally formed on the front end of a general manual rotation screwdriver. ADVANTAGE OF THE INVENTION According to this invention, the said drill taper fitting groove is formed by the drill taper fitting groove main body part and the continuous surface part formed by the surface which continues this body part and is substantially parallel with the said screw shaft, and performs a screw. During the installation and removal, torque is transmitted through the continuous surface in addition to the drill-fitting groove. Therefore, the torque transmission efficiency can be improved. For example, even when the screw is rusty, the screw can still be turned. The screws can be easily removed. In addition, in the case of a small precision screw, although the so-called drill taper touches a drill taper fitting groove when the screw is tightened, the fitting failure may occur, but the occurrence of such a fitting failure has disappeared. In addition, since the length of the continuous face in the screw axis direction is set to 5 to 50% of the length of the drill taper fitting groove body portion in the screw axis direction, the insertability of the drill bit may not be impaired. , Which can improve torque transmission efficiency. Further, since the drill cone is held by the continuous face portion, the so-called outside running phenomenon that the screwdriver drill cone wants to fly out of the cross groove can be suppressed. In addition, a thickened wall is formed around the continuous face of the head, and the drill cone used is identified by the presence or absence of the thickened wall. Therefore, it can be used as a recognition mark that also serves as a continuous face reinforcement without mistakes. When using a normal screwdriver drill. In addition, the thickened wall is provided so that the drill cone fitting groove formed on the head is located at a position higher than the screw body portion, and only the portion where the head and the screw body are connected becomes a thickened wall, so that no head flew down. Happened. In particular, in the small screws for precision parts, if the head fly 9 312 / Invention Manual (Supplement) / 93-04 / 93101351 200525090 is dropped, it is impossible to remove the screw body with the head flying. Avoid such situations. In addition, by fitting the grooves with approximately the same width, and having a shape similar to that of the drill-tape fitting grooves, for example, a thick, cross-shaped wall, continuous face reinforcement can be performed uniformly. By using a screwdriver drill having a drill tip inserted into the drill tap fitting groove, fitted to the main body portion of the upper closing groove, and a continuous portion continuous with the continuous surface of the drill tip, the drill taper can be removed. Torque is transmitted to the screw from the screwdriver drill cone by the continuous part, and the screw is surely installed and removed. By using a punching machine for a screw having a protruding portion for forming the aforesaid drill cone fitting groove and forming a base for the continuous surface portion, a screw for improving torque transmission efficiency can be easily formed. Cross-shaped protrusions for fitting grooves; Z-shaped protrusions that form the base for the continuous face; and parts that form the thick-wall forming grooves for the thick-wall above to prevent outside running or heads from falling off. Special screws can be used to correspond to this [Embodiment] FIG. 1 is a view showing a small screw with a cross groove of the present invention, and FIG. 2 and FIG. 3 are the same cross-sectional views. The head 11 of the screw 10 is shaped, and a cross groove 12 is formed in the head 11. The cross groove 12 is composed of a body portion 13 and a continuous surface 15 formed on a surface parallel to the screw shaft 14. The cross groove body portion 13 is formed in the same shape as the cross groove for the conventional JIS standard J, and is specifically regulated by JISB 1 0 1 2 312 / Invention Specification (Supplement) / 93-04 / 93101351 Surrounding the drill cone, forming the above-mentioned drill cone inlay, and fitting outside the front end part can be simple and continuous head formation. In addition, the drill cone which is easy to identify by the continuous ten times the basis. The top view of the wire Sugi becomes a dish, the cross groove, the continuous face 3 screws. Cross 10 200525090 The groove body 13 is formed in a cross shape by arranging four inclined grooves 16 at 90-degree intervals. Each of the inclined grooves 16 includes a tapered surface 16 a and both side surfaces 16 b and 16 c inclined with respect to the screw shaft 14. As shown in FIGS. 2 and 3, the continuous surface portion 15 is a circumference formed by the tapered surface 16 a and the side surfaces 16 b and 16 c of the inclined grooves 16 of the continuous cross groove body portion 13. The surface 15a and the two side surfaces 15b and 15c are formed so as to be substantially parallel to the screw shaft 14. The intersection angles of these surfaces 1 5 a to 1 5 c with the screw shaft 14 are 5 ± 0.5 degrees, which are the tapered surfaces forming the extraction slope. The crossing angle may be in the range of 0 to 15 degrees, and preferably 2 to 7 degrees. In addition, the depth D 1 of the continuous surface portion 15 is in a range of 5 to 50% of the depth D 2 of the cross groove body portion 13, preferably in a range of 8 to 40%, and most preferably in a range of 2 5 to 4 0 ° / ◦ range. In the present embodiment, the depth D 1 is in a range of 3 ± 0.5% of the depth D 2. The size of the cross recessed body portion 13 is divided into No. 1 to No. 4 according to the size of the screws used, and the size of each portion is determined by J I S B 1 01 2. The length M of the cross groove 12 (see FIG. 1) is determined by the specifications of the screw product. Figures 4 (A) and (B) show the screwdriver drill cone of the present invention used for locking or removing the small dish-shaped head screw. Fig. 4 (C) shows an example of a conventional dish-shaped small screw 50 and a screwdriver drill 51. The screwdriver drill cone 20 of the present invention has a cross-shaped front end portion 2 1 which enters into the cross-shaped groove 12 and is fitted in the cross-shaped groove body portion 13; and the cross-shaped front end portion 21 is continuous and fits the continuous surface portion 1 5 of the continuous part 2 2. Therefore, when the disk-shaped small screw 10 is installed or removed by using a screwdriver drill 20, the screwdriver drill 20 is inserted into the disk-shaped small screw 11 312 / Invention Specification (Supplement) / 93-04 / 93101351 200525090 1 0 When the cross groove 12 is rotated, compared with the disc-shaped screw 50 of the conventional product shown in FIG. 4 (C), except the cross-shaped front end 21 and the cross groove body As shown in FIG. 4 (B), the fitting area S1 between the parts 1 and 3 can be increased by adding the fitting area S2 between the continuous surface portion 15 and the continuous portion 22, so that The punching torque is transmitted to the small disc-shaped screw 10, which can be installed and removed reliably. Further, since the fitting system in the fitting area S2 is performed on a surface substantially parallel to the screw shaft, the torque transmission efficiency can be improved. Therefore, even when the screw 10 is rusted, the screw 10 can be reliably rotated by the positive fitting of the continuous surface portion 15 and the continuous portion 22, and the screw 10 can be easily removed. In addition, by fitting the continuous surface 15 and the continuous portion 22, the dish-shaped small screw 10 with a cross groove is removed from the screwdriver drill cone 20, and the screw 10 can be lifted. Installation operability. FIG. 5 shows an example of a punching machine for forming a cross groove. The punching machine 30 is formed into a cylindrical shape, and the upper end surface is provided with a protrusion 31 for forming a cross groove. The cross-groove forming protrusion 31 is a cross-groove 12 for forming a disc-shaped screw 10, and has a cross-shaped front end 3 1 a for forming the cross-groove body portion 13; and the cross-shaped front end 3 is continuous. 1 a, and the base 3 1 b for the continuous surface 15 described above is formed. The punching machine 30 is mounted on a well-known iron forging machine (not shown). The iron forging machine is a device for processing a wire such as a wire to make a screw, and includes a wire cutting section, a die, an indenter, and a driving section. The wire cutting section cuts out the wire by the length for small screw formation. A head and a cross groove are formed on the cut wire (workpiece) by a die and a punch. A punching machine 3 0 is installed on the indenter. The indenter advances or retracts relative to the die by the driving part, and forms a head on the workpiece. 10 12 3 12 / Invention Manual (Supplement) / 93-04 / 93 101351 200525090 groove. The cross-groove-shaped workpiece is formed by a upset forging machine, and a male screw portion is formed by a well-known forming press device (not shown). A second embodiment of the present invention will be described with reference to FIG. 6. The same components as those of the first embodiment shown in Figs. 1 to 3 are assigned the same reference numerals, and redundant descriptions are omitted. The disc-shaped head screw 60 of the second embodiment is provided with a force so that a normal cross groove and the cross groove 12 of the present invention can be easily recognized. Thick wall 6 1. In addition, by using the shape of the thick wall 61 as a cross shape similar to the shape of the cross groove, the shape of the head portion 62 is different from that of the ordinary one, and the dish-shaped small screw 61 of the present invention can be easily identified. . Thereby, there is no mistake in using an ordinary screwdriver drill. In addition, the height Η1 of the thickened wall 61 is 0.5 mm in, and the height D1 of the continuous surface portion 15 is 1.3 ni in, but these can be appropriately changed. FIG. 7 shows an example of a small dish-shaped head screw for preventing the head from falling off. In the disk-shaped head screw 62 of FIG. 7 (A), the thickness D 1 of the continuous face portion 15 is increased to increase the thickness. The height of 6 1 Η 1 (D 1 < Η 1). By this, compared with the conventional small dish-shaped head screw 6 4 shown in FIG. 7 (C), the bottom of the cross groove 12 is lifted up, and the thick wall t 1 between the head 6 2 a and the screw body 6 2 b. It is thicker than the thick wall t 3 of the conventional screw 6 4. Therefore, the strength of the connection between the head 6 2 a and the screw body 6 2 b can be increased, and the occurrence of head flying off can be suppressed. In addition, as shown in FIG. 7 (A), instead of the difference between the height of the thick wall Η1 and the height D1 of the continuous face, a thick wall t1 between the head 62a and the screw body 62b is ensured. As shown in FIG. 7 (B), the small screw 63 of the dish head increases the height H2 of the head 63a from the height Η3 of the head of the conventional screw 64, and can also increase the head 6 3a and the screw body 6 3 The connection strength of b can also suppress the occurrence of head flying. In addition, in this case 13 312 / Invention Specification (Supplement) / 93-04 / 93101351 200525090, special screw identification marks, such as holes, notches, grooves, etc., are formed in the head 6 3 a in advance, which can be easily identified to prevent outside movement and Special screws flying off the head. In addition, in the case where a sufficient torque is ensured by the material of the screw, etc., in FIG. 7 (A) and (B) described above, the continuous surface portion 15 may be omitted and only the cross groove body portion 13 may be provided. Can also prevent the occurrence of head flying. In each of the above embodiments, the dish-shaped head screw is described as an example, but it can also be used to implement the pan-head screw 65 shown in FIG. 8 or other various head shapes. This case also forms a thickened wall 68 corresponding to the continuous surface portion 67 of the cross groove 66. The height of the thickened wall 68 is not necessarily the same as the height of the continuous surface portion 67, and may be appropriately changed. FIGS. 9 to 11 show an example of a punching machine for forming a head of a pan head screw. The punching machine 70 is formed in a cylindrical shape, and a head forming machine is formed on an upper end surface 70 a of the punching machine. Concavity 7 1. If the head-forming recess 71 is for a pan head screw, the tip of the wire is formed in a pan shape. A cross groove forming protrusion 7 2 is provided at the center of the concave portion 71, and a thick wall forming groove 73 and a thick wall outer shape forming convex portion 74 are provided. The cross groove forming protrusion 7 2 has the same configuration as the cross groove 12 of the pan head screw 10, and has a cross-shaped front end portion 7 2 a fitted into the cross-groove body portion 13; and the cross-shaped front end portion 7 2 is continuous. a, and the base portion 7 2 b for the continuous surface portion 15 is fitted. The thick wall forming groove 7 3 is formed by a recess for forming the thick wall 68. The thick wall outer shape forming convex portion 74 is formed to be continuous with the thick wall forming groove 7 3, and the outer shape of the thick wall 6 8 is formed in a cross shape by the convex portion 7 4. In the above embodiments, the small screws have been described as an example, but they are not limited to these screws, and can be applied to various screws. For example, 14 312 / Invention Specification (Supplement) / 93-04 / 93101351 200525090 can be wood screws and tapping screws. In addition, the shape of the head can also be replaced with a dish, or a pan, and is round, flat, round flat, round dish, arch, flat, flat-joint, round, etc. When manufacturing head-shaped screws such as round heads and pan heads, a punching machine 70 shown in Figs. 9 to 11 is used. In addition, the material may be any material as long as it can be used as a screw, and may be a synthetic resin or the like in addition to various metals. In the case of a synthetic resin, a cross groove having a continuous surface as described above can be formed during molding. In addition to the screws of the dish-shaped head of this embodiment, various screws such as dish-shaped heads, round disk-shaped heads, and round-headed screws can be used. In addition, the present invention can be implemented even if the cross groove body portion 1 3, 6 6 prescribed by JIS is used instead of the cross groove main body portion 1 3, 6 6 having the above-mentioned continuous surface portion 15 for cross grooves other than the prescribed one. In addition, the present invention can also be applied to a cross groove provided with a slot that allows the opposite inclined grooves to be continuous in a straight line and a slotted screwdriver can be used. The present invention can also be implemented in a case where a Y-shaped groove is used as a taper fitting groove instead of a cross groove and corresponding to a Y-shaped three-piece wing. In this case, a continuous face is formed as a continuous Y-shaped groove body. In addition, a thickened wall is formed to surround the continuous face, and the shape of the thickened wall is similar to the Y-shaped groove, which can be distinguished from ordinary screws and easy to identify. Special screws. As the shape of the thickened wall as the identification mark, in addition to those shown in FIGS. 6 and 8, as shown in FIG. 12, it can also be a belt-shaped thickened wall 80. In this case, the thickened wall 80 can also be used. The small dish-shaped screw 8 4 is identified as a special screw, and the vertical face 15 is reinforced by the thick wall 80. [Brief description of the drawings] FIG. 1 is a plan view showing a small dish-shaped head screw with a cross groove according to the present invention. 15 312 / Invention Specification (Supplement) / 93-04 / 93101351 200525090. FIG. 2 is a longitudinal sectional view taken along the line Π-Π in FIG. 1. FIG. FIG. 3 is a cross-sectional view taken along the line m-IIi in FIG. 2. FIG. 4 (A), (B) are side views showing a part of the screwdriver drill cone and the small dish screw when the small dish screw used in the present invention is locked or removed; FIG. 4 (C) is a side view of a part of a conventional dish-shaped small screw and a screwdriver drill tap for comparison display. Fig. 5 is a front view showing an example of a punching machine for forming a cross groove according to the present invention. Fig. 6 is a perspective view showing a small dish-shaped head screw according to another embodiment. 7 (A) to 7 (C) are longitudinal sectional views showing a small dish-shaped head screw in another embodiment. FIG. 8 is a perspective view showing a pan head small screw according to another embodiment. Fig. 9 is a plan view showing an example of a punch for forming a head of a pan head screw. Fig. 10 is a side view of the same punching machine. Fig. 11 is an enlarged front view showing a protrusion for forming a cross groove of the same punching machine. Fig. 12 shows a small dish-shaped head screw of another embodiment, Fig. 12 (A) is a top view, and Fig. 12 (B) is a longitudinal sectional view. (Explanation of component symbols) 10 Small screw with head 11 Head 12 Cross slot 16 312 / Inventory support (supply) / 93-04 / 93101351 200525090 13 Cross slot body 14 Screw shaft 15 Continuous surface 1 5 a Peripheral surface 15b side surface 15c heel surface 16 inclined groove 16a tapered surface 16b side surface 16c side surface 2 0 screwdriver drill cone 2 1 cross-shaped front end 22 continuous part 30 punching machine 3 1 cross-groove forming protrusion 3 1a cross-shaped front end 3 1b base 50 Small dish screw 5 1 Screwdriver bit 6 0 Small dish screw 6 1 Thickened wall 6 2 Head 6 2a Head 62b Screw body 3 12 / Explanation window (Supplement) / 93-04 / 93101351 17 200525090 63 Disc head small screw 63a Head 63b Screw body 64 Disc head small screw 65 Pan head screw 66 Cross groove 67 Continuous surface 68 Thick wall 70 Punching machine for forming head 70a Upper end 71 head Section forming recess 72 Cross groove forming protrusion 72a Cross-shaped front end portion 72b Base portion 73 Thick wall forming groove 7 4 Thick wall forming Convex 80 Band-shaped thick wall 81 Disk-head small screw 84 Disk-head small screw D1 Height of continuous face 1 5 HI Height of thick wall 61 H2 1¾ degree of head 63a H3 Head height SI Fitting area 312 / Invention Specification (Supplement) / 93-04 / 93101351 18 200525090 t 1 Thick Wall t 3 Thick Wall 312 / Invention Specification (Supplement) / 93-04 / 93101351 19