九、發明說明： 【發明所屬之技術領域】 本發，^及#打螺釘機，其是將壓縮 源的所謂氣動工具，是_邊使在前端放置有‘==力 頭旋轉-邊使之沿車由向前進而將該螺釘向螺釘入 打入（擰入）的打螺釘機。 入材枓中 【先前技術】 .例t’在作為底材的木板上螺旋固定作為表面材的石 嘗板的f月況下，使用可逹續地緊固多個螺釘的打螺=石 以壓縮空氣作為動力源的活塞的推 綷抵通喜祐σ孔動馬達的旋轉力（擰緊力）-邊旋轉蟫 :§ 使之沿轴向移動的構成，根據該構成，在螺i 私動過程中，將螺絲批獅前端與朗地連蛛有多 2=釘連結帶的螺釘頭部鼓合，並將該螺 在該狀態下―邊旋轉該螺釘—邊使之貫通於 固定於底材上。 由此叮以將表面材螺旋 該打螺釘機有關的技術，以往公知的有例如在 下1讀1巾公開的技術。糊讀1巾公開有如 、:將使螺絲批頭沿轴向移動的活塞分割為主 入土 兩部分’打入初期用較大的推力可靠地打 二其後一邊用較弱的推力推屡一邊使其旋轉，從 =保高翁耐受性，該情況下，用於隨著活塞的移 =動馬達及其輸出減速的減速機構—體地沿打入方向行 在氣動馬達和減速機構與活塞—體地沿打入方向移動 1354611 的構成的情況下’發生移動的構件的重量變大，盆纟士果， 打入時的反作用變大’從而有可能使得打入動作變得不穩 定。 針對於此，專利文獻2中公開有如下的技術，即，設 成不使氣動馬達及減速機構沿打入方向移動，而僅使活夷 及螺絲批頭沿打入方向移動的構成’而減小打入時的反$ 用’並且將氣動馬達的旋轉輸出經由減速機構放大而向螺 絲批頭傳遞，由此來實現氣動馬達的緊湊化，進而實現打 入的小型輕量化。 ' φ 專利文獻1:日本專利第3793272號公報 專利文獻2 ·日本專利特開平11 — 300639號公報 但是，在上述專利文獻中所公開的以往技術中也有應 進一步改進的地方。對於擰入的螺釘施加擰緊力（轉矩） 的構件為氣動馬達，該氣動馬達的旋轉輸出是經由螺絲批 頭而施加於螺釘上的。另外，如上所述為了不使氣動馬達 直徑增大來獲得較大的擰緊力，而使氣動馬達的輸出通過 減速機構放大並向螺絲批頭輸出。根據該觀點，上述 文獻2中記载的技術中，將氣動馬達及減速機構配置於射 # 钉機主體的後部側，其結果形成如下的構成，即，螺絲批 頭變長’在與減速機構距離較大的部位進行掉緊。该 構成中，相對於螺絲批頭產生繞著轴的彎曲（扭曲）了從而 有無法，減速機構向螺釘進行有效的轉矩傳遞的問題。 於上’上述的專利文獻1中公開的技術中，對 於活塞、軋動馬達和減逮機構的相 構成 螺4批頭报長，結果容易產生扭曲變形’在這 8 :點上與上述專利文獻2中公開的技術基本相同，從而無 '形成能夠進行有效的轉矩傳遞的構成。 【發明内容】 本發明鑒於該問題而完成的，其目的在於，不僅可以 ，制打入時的反作用，而且可以使氣動馬達的旋轉輸出經 由螺絲批頭有效地向螺釘傳遞。 口此本發明採用了各技術方案中所述的構成的打螺 j技術讀丨所述的打螺釘機，由於氣動馬達在比 打入方向前端的位置上固定於主體罩殼上，因此 在更靠近打入部的部位上 氣動时案2所述的打螺釘機，減速機構部配置於 ::動：達及軋缸的前端側且最靠近螺釘的打入部位的部 咖i釘及減速機構部在該前端側的位置上被 於作為向螺絲批頭傳遞擰緊轉 土 =此，由 減速機構部與螺絲批S的，傳遞鍋 以參與螺絲批頭的扭曲變形 減速機構部輪出的氣動馬達的旋編 入方叙速機構部、氣動馬達及氣缸被無法沿打 件僅疋在主體罩殼上’沿該方向移動的主要構 於最限i。螺絲批碩，因此可以將打入時的反作用抑制 另外，根據技術方案2所述 馬達配置錢速機構部與驗 了機，由於將氣動 置於比較靠近把手部的部位二’因此該氣動馬達被配 打入方6沾由It匕 通吊’把手部被以從主體罩 把===:=態設置，且在該 手部内的排氣管的部位，因自 == =徑縮短並簡單化，可以提== 體罩殼把:f相對，在主 向前端側’配置減速機構和 巴::二=: 針機的重心設定於把手部的 運口此很合易將邊射 情況下很容易取得該輯機 ’^此在㈣把手部的 1ΐ^】提高錢作性錢祕能。^__下的 行說:面第爾施方式進 1的非動作狀態(初始狀能二;方，及的打螺釘機 二==:態的把手部3。在把手部3的 尖進行扣拉;=以：=通過使用者用指 本身與以往公知的闕相同，==。由於觸發閱4 打變因此對其構成及動作省略tLU不需要特別進 前端r=:)5:=:即從主_的 根螺釘S打入到螺釘打入材料 1354611 L二打入材料w是具有表面材wi和底材w2的雙層 Γ、； ’表面材W1例如為石膏板，底材w2為木板或 鋼板。 1 邹3的前端’連接有用於供給成為該打螺釘機 二動力:內，空氣的通氣軟管6。從該通氣軟 壓室7供給I輕氣。另外，在該把手 端如)者其長邊方向安裝有排氣管8。該排氣管8 f⑽氣π 8a)在把手部3的前端 8 8的另一_與設於主體部 排乱吕 部2的下部與把手部3:在主體 持多根螺針s〜s_4t連有收排保 於將從釘倉u中拉出的螺釘連 ^；的釘倉11;用 的螺釘連結帶進給機構12。 、σ向脰。卩2側斷續供給 主體部2在第-圖中從上 別、氣動馬達50和減速機構部7〇。 ；/舞擊打機構部 部20相對於把手部3配置於上側，氣動3斤-，擊打機構 構部70配置於下側。 .....建5〇和減速機 擊打機構部20具備氣缸21和收容 Μ。活塞22被可在氣红21内沿圖示上下2内部的活塞 2。以下，將氣缸21内部的空氣室且由活AT移Ϊ地 地劃分的上側的室稱作氣缸上室2 塞22氣後性 下室25。 #卜别的室稱作氣缸 氣缸22被無法移動地保持於保持套 持套筒27固定於主體部2的主體罩殼^上β的内側。保 在活塞22的下面中心’結合有蟫碎拙 其可繞著熟旋轉，且無法沿_移動、23的上端部， 勒系絲抵頭23從活 1354611 塞22的下面中心向下方（螺釘打入方向）很長地延伸直到 到達主體部2的前端部附近。 在保持套筒27的上部外周側，配置有呈圓筒形狀的頭 閥30。該頭閥30及其周邊的詳細情況示於第三圖中。第 三圖表示如下狀態，即從第一圖及第二圖所示的初始狀態 起，對扳機5開始進行扣拉操作而將頭閥30開始打開，由 此氣動馬達50開始旋轉，另外阻尼器26上移的狀態。對 於這些從初始位置起的動作將在後面敍述。 在該頭閥30與頭罩殼2b之間夾設有壓縮彈簧31〜 31。利用該壓縮彈簧31〜31將頭閥30常時向下（關閉側） 推動。另外，可以切換為對該頭閥30的上面側（頭閥上室 30a)經由觸發閥4作用有蓄壓室7的壓縮空氣的狀態、和 向大氣開放而不作用壓縮空氣的狀態。該頭閥上室30a的 空氣壓力作用狀態的切換是由扳機5的操作及觸發閥4的 動作來實現的。 另一方面，在頭閥30的下部，遍及整周地分別設有向 使壁厚變薄的方向傾斜的外周側的受壓面30e和内周侧的 受壓面30f。在外周側的受壓面30e的下方劃分的頭閥下 室30d中，常時流入蓄壓室7的壓縮空氣。因此，在受壓 面30e上常時作用有壓縮空氣的空氣壓力。作用於受壓面 30e上的壓縮空氣壓力沿將頭閥30向上方移動的方向作 用。 當利用扳機5的扣拉操作使觸發閥4進行打開動作 時，頭閥上室30a的壓縮空氣被排出而向大氣開放。壓縮 彈簧31〜31的作用力被設定為比作用於頭閥30的受壓面 30e上的壓縮空氣的壓力更小。因此，當觸發閥4進行打 12 1354611 開動作時，頭閥30利用作用於其受壓面30e上的壓縮空氣 壓力克服壓縮彈簧31〜31而上移。 當頭閥30上移時，在其下端與閥台座部35的上表面 之間開始打開的初始階段（半開的狀態），内周側的通氣室 30b與外周側的頭閥下室30d連通，其結果壓縮空氣流入 到通氣室30b内。通氣室30b經由通氣室32與氣動馬達 50連通。因此，在頭閥30開始打開的初始階段，首先是 氣動馬達50開始旋轉。對於氣動馬達50的詳細情況將在 後面敍述。 • 流入到通氣室30b内的壓縮空氣，作用於頭閥30的内 周側的受壓面30f上，因此其後頭閥30就會一直上移而被 全開。第七圖中表示頭閥30全開的狀態。當頭閥30全開 時，在其與在保持套筒27的上部外周安裝的密封圈27a 之間就會打開通氣路，而使頭閥30的内周側的通氣室30c 與通氣室30b連通，從而壓縮空氣就會流入到該通氣室 30c。流入到通氣室30c内的壓縮空氣經由在氣缸21的上 部安裝的流量切換閥40而流入到氣細上室24内。當這樣 壓縮空氣流入到氣缸上室24内時，活塞22下移。當活塞 22下移時，螺絲批頭23 —體地沿著其軸向下移。 當螺絲批頭23下移時，其前端就會與由釘倉11供給 的螺釘連結帶的一根螺釘S的頭部卡合，在該狀態下將該 螺釘S從螺釘連結帶上取下後，將其打入到螺釘打入材料 W中。螺絲批頭23的打入力（活塞22的推力）可以通過 利用以下說明的流量切換閥40來切換流向氣缸上室24的 吸氣流量，而切換為大小兩個標。 該流量切換閥40的詳細情況也表示於第十圖至第十 13 1354611 六圖中。該流量切換闊40具備將氣缸21的上端部以氣密 性地填塞的狀態固定的近似圓板形的閥台座部4卜閥主體 42、變更兩者的相對位置的切換操縱桿43。 閥台座部41被嵌入於以研缽形敞開的氣缸21的上端 部’並且以氣密性地夾入於該氣缸21的上端部與頭罩殼 2b之間，狀態，被固定絲法在軸向上移動且無法繞轴旋 轉的狀癌。該閥台座部41具有適度的彈性，還 塞22的切端(上止點)，並且吸收其上4的 為阻尼益（緩衝體）的功能。在該閥台座部41上，設有沿 其板厚方向貫通的基準通氣孔仙〜仙。本實施方二中: 3個基準通氣孔41a〜41a配置於圓周方向的三 (120。，隔）。如第十二圖及第十五圖所示，各基準通氣孔 41a以扇形開口，其開口面積變得比較大。 閥主體42是具有與閥台座部41白勺上表面相對置的近 η形狀的構件，且在其上面中心一體地設有支軸部 借助該支轴部42c，闕主體42被以可繞著其轴心旋 軸線方向在一定的範圍内平行移動的狀態支承 ί支轴部^貫通頭罩殼2b，並向在該頭 η 置的凹部2c内突出。在該突出部分上安 f有刀換她桿43。切換操縱桿43由小螺針45固定於支 WM2c的前端。間主體42的圍繞支軸部似的位置可以 笛IS?操縱捍43的轉動操作而從外部簡單地切換。如 丢、I c f十二圖所不’頭罩殼2b的凹部2c形成為俯视 ^ 〇打開的扇形。切換操縱桿43被以基本上不從該 =内伸出的狀態收容。因此，切換操縱桿43在約60。 、辄内被傾動操作。通過將切換操縱桿43以約⑼。傾動 1354611 操作，可以將閥主體42在約60。的範圍内旋轉操作。 在闕主體42上’分別沿板厚方向貫通地設有三個大通 氣孔42a〜42a和三個小通氣孔42b〜42b。三個大通氣孔 42a〜42a配置於以支軸部42c為中心的圓周方向的三等分 位置。本貫施方式中，各大通氣孔42a形成為與上述閥台 座部41側的基準通氣孔4ia相同大小的扇形。三個小通氣 孔42b〜42b也配置於以支軸部42c為中心的圓周方向的三 等分位置。各小通氣孔42b配置於在圓周方向上鄰接的2 個大通氣孔42a、42a之間的中央。從而，三個大通氣孔 42a〜42a和三個小通氣孔42b〜42b基本上在同一圓周上 以60間隔交互地配置。因此，當將切換操縱桿43在約6〇。 的範圍傾動操作時’則可以切換為相對於閥台座部的三 ，基準通氣孔41a〜41a的每一個，對準大通氣孔42a的狀 悲（第十二圖中所示的狀態）、和對準小通氣孔42b的狀態 (第十五圖中所示的狀態）。 在相對於閥台座部41的基準通氣孔41a〜41a對準大 通氣孔42a〜42a的狀態、和對準小通氣孔421)的狀態下， 頭閥30的内周側的通氣室3〇c與氣缸上室24之間的流路 面積有很大不同。與前者的情況相比，後者的情況下流路 面積變小。前者的情況下，三個大通氣孔42a〜42a的合計 面積（本實施方式的情況下，與三個基準通氣孔41a〜41a 的合計面積基本相等）成為流路面積，後者的情況下，三 個小通氣孔42b〜42b的合計面積成為流路面積。 因此，在前者的情況下’流入到氣缸上室24的每單位 時間的壓縮空氣的流入量變大而使活塞22的推力變大，從 而螺釘S的打入力變大。如後所述’該情況適用於底材W2 15 1354611 為鋼板的情況（鋼板模式）。 與之不同，後者的情況下，流路面積縮小，每單位時 間的壓縮空氣向氣缸上室24的流入量變小，其結果活塞 22的推力與前者的情況相比變小，因此螺釘s的打入力變 小。該情況適用於底材W2為木板的情況（木板模式）。 如上所述’本實施方式的打螺釘機1具備用於調整螺 釘s的打入力的流量切換閥4〇。根據該流量切換閥4〇，可 以If縮空氣向氣缸上室24的流人量以兩個檔切換，由此 無論是在=謂的打鋼板的情況下還是在打木板的情況下， =用最佳的打人力進行打人作業。第十圖表示將切換 =紙桿43切換為適於打鋼板的鋼板模式的狀態，第十一圖 :不將切換操縱桿43切換為適於打木板的木板 恶。 持於的底部’設有用於將切換操縱桿43分別保 2e。、另—果工位置和木板模式位置的位置保持凸部2d、 的壓縮過失設於其與頭罩殼2b之間 向下）力 皮向朝閥台座部41推㈣方向（圖中為 上的操縱尸43 ^ 體地安裝於閥主體42的支轴部42c 凹部為通過該壓縮彈簧44的作用力而向朝 1= =44的作用力保持操縱㈣ 卡合狀態，並職予適度的移動阻Π t η亥私動阻力，可將切換操縱 、 位置上，並防止其意外的移動。d㈣地保持於各個 此外，闕主體42由上述遷縮彈笪 部41推壓的方向施 扁只4而被向朝閥台座 "力在上述鋼板模式的情況下，大致相 16 1354611 同開口面積的大通氣孔42a〜42a分別與閥台座 個基準通氣孔41a〜41a對準，因此活塞22 J ± 的二 上室24内的壓縮空氣壓力基本上不^於氣虹 因此’在鋼板模式下的活塞上移時，閥主體42被上。 壓在閥台座部41的上表面的狀態，從而壓縮空氣向|於推 室24内的流人及從氣缸上室24内的排氣都= = t 通氣孔41a〜41a的合計面積作為流路面積來進行的土 / 與之不同，在第十三圖至第十六圖中所示的木 的情況下，相對於閥台座部41的三個基準通氣= 41a，分別對準與之相比足夠小的開口面積的小 ^ 〜42b。因此，如第十四圖所示，在各基準通氣孔^ ， 形成閥主體42的下面向氣缸上室24内露出 ^ 出了的部分作為承受活塞上移時的氣紅上室24 空氣壓力的受壓面42d而發揮作用，因此氣缸上 ， 壓縮空氣屢力會作用於閥主體42上。該情沉下二， 24内的壓縮空氣壓力沿使閥主體42克服壓縮 移的方向作用。壓縮彈簧44的作用力被適當地二而土 用活塞22上移時的氣紅上室24内的壓 又而佶 該閥主體42上移。 乱壓力而可使 移示，當閥主體42克服麼縮彈簧44而上 移τ °亥閥主體42離開閥台座部41的上表面 :經由該間隙似，活塞上室24不僅與閥 ，L42al!2：；^ 如上所述，在第十圖至第十二圖中所示的 情況下，相對於閥台座部41的基準通氣孔4la〜41a:分 1354611 別對準閥主體4 2的大通氣孔4 2 a，因此活塞 — 位時間流向氣缸上室24的吸氣流量變多，可以U = 打入力，並且可以確保足夠量夷 又于仅大的 24中的每單位時間的排氣量，由此;:::二氣=室 實現活塞22的順暢的上移動作。 。回排虱效率而 與之不同，在第十三圖至第+; 的情況了，活塞下移時的每單ϋ不的木板模式 氣流量墙小，可以奸、高二 風上室24的吸 孔l里細J叮以獲侍適於打木板的較弱的打入力 通過在活I上移時閥主體42克服壓縮彈簧44而移動，可 以將流路面積自動地拓寬而續保高排氣效率，從而在該产 況下，也可以確保活塞22的順暢的上移動作。 以月 排氣經由流量切換閥40而返回到頭閥3〇的内 通氣室30c。該情況下，頭閥3〇下移而封閉保持套筒^， =通氣室30c成為與通氣室3〇b及頭閥下室_氣穷性 地，斷的狀態。因此，排氣就會經由設於頭閥3〇上的ς氣 1 而向該頭閥3〇的外周側的排氣室30h排出： r:二丰::由省略了圖不的排氣路而與排氣室8b連通， ^而與把手π 3内的排氣f 8連通。流 氣（壓縮空氣）經由排氣口 8a向大氣中排出^ 8的排 上::側的周面上設有多個排氣孔 28而僅齒由安裝於外周側的密封圈 此』：：产氣侧）地氣密性地封堵(止回閥)。因 閥4〇 上室24⑽4除了由上述流量切換 ❿〜2la^二厂還由該排氣孔仏〜…進行。從排氣孔 相同地流入到通=氣内與:由流量切換閥4。的排氣 J通虱至30c内，其後經由排氣孔3〇g〜3〇g 18 1354611 向排氣室30h排出。 f塞下料的氣^^25的 的:部側的周面上的多個回送孔21卜仙進行的:回 =、，氣㈣與保持套筒-之間二以 止：而將阻尼器26打開的階段，屬縮 達下 〜抓從通氣室33流入到該回送空氣室 泛 回送空氣室29内的壓縮空氣，在活㈣Nine, the invention: [Technical field of the invention] The present invention, the ^ and # screw machine, which is a so-called pneumatic tool that compresses the source, is placed at the front end with a '== force head rotation-side A screwing machine that drives the screw into the screw in the forward direction and then pushes the screw into the screw. [In the prior art] [Example] In the case of a stone plate which is spirally fixed as a surface material on a wooden board as a substrate, a snail=stone which can continuously tighten a plurality of screws is used. Compressed air as the power source of the piston pushes against the rotational force (tightening force) of the σ σ hole motor - the side rotation 蟫: § makes it move along the axial direction, according to this configuration, in the snail i private movement process In the middle of the screw, the front end of the lion's lion is smashed with the screw head of the 2nd nail joint belt, and the screw is rotated in the state to be fixed to the substrate. . Thus, the technique for screwing the surface material to the screw machine has been known in the art, for example, in the following 1 reading. The paste reading 1 towel is as follows: the piston that moves the screwdriver bit in the axial direction is divided into two parts of the main soil. 'In the initial stage of the driving, the large thrust is used to reliably hit the second part, and then the side is pushed with the weaker thrust. Rotating it from = high tolerance, in this case, the speed reduction mechanism for decelerating with the displacement of the piston and its output - in the direction of the driving direction in the air motor and the speed reduction mechanism and the piston In the case where the body 13300011 is moved in the driving direction, the weight of the member that moves is increased, and the reaction of the pot and the fruit is increased, which may make the driving operation unstable. In view of this, Patent Document 2 discloses a technique in which the air motor and the speed reduction mechanism are not moved in the driving direction, but only the configuration in which the screwdriver head moves in the driving direction is reduced. When the small drive is reversed, the rotary output of the air motor is amplified by the speed reduction mechanism and transmitted to the screwdriver bit, thereby achieving compactness of the air motor and further reducing the size and weight of the drive. 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The member that applies the tightening force (torque) to the screw that is screwed in is a pneumatic motor whose rotary output is applied to the screw via the screwdriver bit. Further, as described above, in order to obtain a large tightening force without increasing the diameter of the air motor, the output of the air motor is amplified by the speed reducing mechanism and output to the head of the screwdriver. According to this technique, in the technique described in the above document 2, the air motor and the speed reduction mechanism are disposed on the rear side of the nailing machine main body, and as a result, the screwdriver head is lengthened to be in the speed reduction mechanism. The larger part is tightened. In this configuration, there is a problem that the screw bit is bent (twisted) around the shaft, and the speed reduction mechanism transmits the screw to the screw with an effective torque. In the technique disclosed in the above-mentioned Patent Document 1, the phase of the piston, the rolling motor, and the mitigation mechanism constitutes a snail 4 batch head, and the result is easily distorted. In the 8: point and the above patent document The techniques disclosed in 2 are basically the same, so that there is no formation of an effective torque transmission. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to enable not only the reaction at the time of driving but also the rotational output of a pneumatic motor to be efficiently transmitted to a screw via a screwdriver bit. The present invention adopts the screwing machine described in the technical solutions described in the respective technical solutions. Since the air motor is fixed to the main body casing at a position higher than the front end of the driving direction, The screwing machine described in Pneumatic Case 2 is located near the driving portion, and the speed reducing mechanism portion is disposed at: the movable portion: the front end side of the rolling cylinder and the portion closest to the driving portion of the screw and the speed reducing mechanism At the position of the front end side, the air is transferred to the head of the screwdriver, and the air motor is rotated by the speed reduction mechanism portion and the screwdriver S, and the air is transferred from the distortion deformation mechanism of the screwdriver head. The rotary knitting mechanism, the air motor and the cylinder are not able to move along the main body cover along the punching member, and the main movement in the direction is the maximum limit i. The screwdriver is so as to be able to suppress the reaction at the time of the injection. According to the second aspect of the invention, the motor is configured with the money-speed mechanism and the machine. Since the pneumatic device is placed closer to the handle portion, the air motor is With the driver's side 6 dip by the It 匕 ' 'handle part is set from the body cover ===:= state, and the part of the exhaust pipe in the hand is shortened and simplified by the === diameter , can be raised == body cover: f relative, in the main to the front side of the 'configuration of the speed reduction mechanism and the bar:: two =: the center of gravity of the needle machine is set at the handle of the handle is very easy to be in the case of side shots It is easy to get the machine's ^^ This is the (4) handle part of the 1ΐ^] to increase the money for sex. The line under ^__ says: the non-action state of the face of the first mode (the initial shape can be two; the square, and the screw machine 2 ==: the handle portion 3 of the state. Pull; = by: = by the user's finger itself is the same as the conventionally known ,, ==. Because the trigger read 4 is changed, the configuration and operation of the tLU are omitted. No special front end r=:)5:=: The root screw S is driven from the main screw to the screw driving material 1354611 L. The second driving material w is a double layer crucible having a surface material wi and a substrate w2; 'the surface material W1 is, for example, a gypsum board, and the substrate w2 is a wood board. Or steel plate. 1 The front end of the Zou 3 is connected to a ventilation hose 6 for supplying the screw machine. I light gas is supplied from the ventilating soft chamber 7. Further, an exhaust pipe 8 is attached to the longitudinal direction of the handle end. The exhaust pipe 8 f (10) gas π 8a) is at the other end of the front end 8 8 of the handle portion 3 and the lower portion of the main body portion is arranged in the lower portion 2 and the handle portion 3: the main body holds a plurality of screw needles s~s_4t There is a staple cartridge 11 that is secured to the screw that is pulled out from the staple cartridge u; the screw is used to connect the tape feed mechanism 12. σ 脰.卩2 side intermittent supply The main body 2 is in the first view from the top, the air motor 50 and the speed reduction mechanism unit 7〇. The dance striking mechanism unit 20 is disposed on the upper side with respect to the handle portion 3, and is pneumatically 3 kg-, and the striking mechanism portion 70 is disposed on the lower side. ..... Construction and Reduction Gear The striking mechanism unit 20 is provided with a cylinder 21 and a housing cymbal. The piston 22 is slidable within the gas red 21 along the piston 2 inside and outside the figure 2. Hereinafter, the upper chamber in which the air chamber inside the cylinder 21 is divided by the living AT is referred to as the cylinder upper chamber 2 plug 22 and the rear lower chamber 25. The chamber of the chamber is referred to as a cylinder. The cylinder 22 is held in a state in which the holding sleeve 27 is fixed to the inner side of the main body casing β of the main body portion 2 so as not to be movable. In the lower center of the piston 22, the smashing smash is combined with the smashing squeegee, which can rotate around the lap, and cannot move along the upper end of the _, 23, the tying head 23 from the lower center of the live 1354611 plug 22 downward (screw The in-direction) extends very long until it reaches the vicinity of the front end portion of the main body portion 2. A head valve 30 having a cylindrical shape is disposed on the outer peripheral side of the upper portion of the holding sleeve 27. Details of the head valve 30 and its periphery are shown in the third figure. The third diagram shows a state in which the trigger 5 is started to be pulled by the trigger 5 from the initial state shown in the first and second figures, and the head valve 30 is started to be opened, whereby the air motor 50 starts to rotate, and the damper is additionally provided. 26 moves up. The actions from the initial position will be described later. Compression springs 31 to 31 are interposed between the head valve 30 and the head cover 2b. The head valve 30 is constantly pushed downward (closed side) by the compression springs 31 to 31. Further, it is possible to switch to a state in which the compressed air of the pressure accumulation chamber 7 is applied to the upper surface side of the head valve 30 (the head valve upper chamber 30a) via the trigger valve 4, and a state in which it is opened to the atmosphere without acting on the compressed air. The switching of the air pressure action state of the head valve upper chamber 30a is achieved by the operation of the trigger 5 and the action of the trigger valve 4. On the other hand, in the lower portion of the head valve 30, the pressure receiving surface 30e on the outer circumferential side and the pressure receiving surface 30f on the inner circumferential side which are inclined in the direction in which the thickness is reduced are provided over the entire circumference. The head valve lower chamber 30d, which is defined below the pressure receiving surface 30e on the outer peripheral side, constantly flows into the compressed air in the pressure accumulating chamber 7. Therefore, the air pressure of the compressed air is constantly applied to the pressure receiving surface 30e. The compressed air pressure acting on the pressure receiving surface 30e acts in a direction in which the head valve 30 is moved upward. When the trigger valve 4 is opened by the pulling operation of the trigger 5, the compressed air of the head valve upper chamber 30a is discharged and opened to the atmosphere. The urging forces of the compression springs 31 to 31 are set to be smaller than the pressure of the compressed air acting on the pressure receiving surface 30e of the head valve 30. Therefore, when the trigger valve 4 performs the opening operation of the 12 1354611, the head valve 30 is moved upward against the compression springs 31 to 31 by the compressed air pressure acting on the pressure receiving surface 30e. When the head valve 30 is moved up, an initial stage (a half-open state) is started between the lower end and the upper surface of the valve seat portion 35, and the inner peripheral side venting chamber 30b communicates with the outer peripheral side head valve lower chamber 30d. As a result, the compressed air flows into the venting chamber 30b. The venting chamber 30b is in communication with the air motor 50 via the venting chamber 32. Therefore, in the initial stage in which the head valve 30 begins to open, first, the air motor 50 starts to rotate. Details of the air motor 50 will be described later. • The compressed air that has flowed into the venting chamber 30b acts on the pressure receiving surface 30f on the inner circumference side of the head valve 30, so that the rear head valve 30 is always moved up and fully opened. The state in which the head valve 30 is fully opened is shown in the seventh figure. When the head valve 30 is fully opened, the air passage is opened between the seal ring 27a and the seal ring 27a attached to the outer periphery of the upper portion of the retaining sleeve 27, and the air chamber 30c on the inner circumference side of the head valve 30 is communicated with the air chamber 30b, thereby The compressed air flows into the venting chamber 30c. The compressed air that has flowed into the ventilation chamber 30c flows into the upper air chamber 24 via the flow rate switching valve 40 attached to the upper portion of the cylinder 21. When such compressed air flows into the upper chamber 24 of the cylinder, the piston 22 moves downward. When the piston 22 is moved down, the screwdriver bit 23 is physically moved down along its axial direction. When the screwdriver bit 23 is moved downward, the front end thereof is engaged with the head of a screw S of the screw coupling belt supplied from the staple cartridge 11, and the screw S is removed from the screw coupling belt in this state. , drive it into the screw into the material W. The driving force of the screwdriver bit 23 (the thrust of the piston 22) can be switched to the size of two by using the flow switching valve 40 described below to switch the intake flow rate to the upper chamber 24 of the cylinder. The details of the flow switching valve 40 are also shown in the six figures of the tenth to tenth 13 1354611. The flow rate switching width 40 includes a substantially disk-shaped valve seat portion 4 that is fixed in a state in which the upper end portion of the cylinder 21 is hermetically sealed, and a valve lever body 42 that changes the relative positions of the two. The valve seat portion 41 is fitted in the upper end portion ' of the cylinder 21 that is open in the form of a mortar and is airtightly sandwiched between the upper end portion of the cylinder 21 and the head cover 2b. A cancer that moves up and cannot rotate around the axis. The valve seat portion 41 has a moderate elasticity, and also cuts the cut end (top dead center) of the plug 22, and absorbs the function of the upper 4 as a damping benefit (buffer body). The valve pedestal portion 41 is provided with a reference vent hole stencil penetrating in the thickness direction thereof. In the second embodiment, the three reference vent holes 41a to 41a are arranged in three (120 Å) intervals in the circumferential direction. As shown in Fig. 12 and Fig. 15, each of the reference vent holes 41a has a fan-shaped opening, and its opening area becomes relatively large. The valve main body 42 is a member having a near-n-shape opposite to the upper surface of the valve seat portion 41, and is integrally provided with a fulcrum portion at the center thereof by means of the fulcrum portion 42c, and the cymbal main body 42 is circumscribed The state in which the axial direction of the axis of the axis of rotation rotates in parallel within a certain range, the support shaft portion passes through the head cover 2b, and protrudes into the concave portion 2c of the head n. On the protruding portion, a knife is replaced with a knife 43. The switching lever 43 is fixed to the front end of the branch WM2c by a small screw 45. The position of the intermediate body 42 around the fulcrum portion can be simply switched from the outside by the rotational operation of the whistle. For example, the recessed portion 2c of the head cover 2b is formed in a fan shape which is opened in a plan view. The switching lever 43 is housed in a state where it does not substantially protrude from the inside. Therefore, the switching lever 43 is at about 60. The inside is tilted to operate. By switching the joystick 43 to about (9). Tilting 1354611 operation, the valve body 42 can be placed at approximately 60. The rotation of the range. Three large through holes 42a to 42a and three small vent holes 42b to 42b are provided in the dam main body 42 so as to penetrate in the thickness direction. The three large vent holes 42a to 42a are disposed at three equal positions in the circumferential direction around the fulcrum portion 42c. In the present embodiment, each of the large vent holes 42a is formed in a fan shape having the same size as the reference vent hole 4ia on the valve seat portion 41 side. The three small vent holes 42b to 42b are also disposed at three equal positions in the circumferential direction around the fulcrum portion 42c. Each of the small vent holes 42b is disposed at the center between the two large vent holes 42a and 42a adjacent in the circumferential direction. Thereby, the three large vent holes 42a to 42a and the three small vent holes 42b to 42b are alternately arranged at substantially 60 intervals on the same circumference. Therefore, when the joystick 43 is to be switched at about 6 。. When the range tilting operation is performed, it can be switched to three with respect to the valve seat portion, each of the reference vent holes 41a to 41a, the sorrow of the large vent hole 42a (the state shown in the twelfth figure), and The state of the quasi-small vent 42b (the state shown in the fifteenth figure). In a state where the large vent holes 42a to 42a are aligned with respect to the reference vent holes 41a to 41a of the valve pedestal portion 41 and the small vent holes 421) are aligned, the ventilating chamber 3〇c of the inner peripheral side of the head valve 30 is The flow path area between the upper chambers 24 of the cylinders is very different. In the latter case, the flow path area is smaller than in the case of the former. In the former case, the total area of the three large vent holes 42a to 42a (in the case of the present embodiment, the total area of the three reference vent holes 41a to 41a is substantially equal) is the flow path area, and in the latter case, three The total area of the small vent holes 42b to 42b is the flow path area. Therefore, in the former case, the inflow amount of the compressed air per unit time flowing into the cylinder upper chamber 24 is increased, and the thrust of the piston 22 is increased, so that the driving force of the screw S is increased. As will be described later, this case applies to the case where the substrate W2 15 1354611 is a steel sheet (steel plate mode). On the other hand, in the latter case, the flow path area is reduced, and the amount of inflow of compressed air per unit time into the upper chamber 24 becomes smaller, and as a result, the thrust of the piston 22 becomes smaller than that of the former, so the screw s is hit. The input is getting smaller. This case is applicable to the case where the substrate W2 is a wooden board (wood board mode). As described above, the screwing machine 1 of the present embodiment includes the flow rate switching valve 4A for adjusting the driving force of the screw s. According to the flow rate switching valve 4, it is possible to switch the amount of air to the upper chamber 24 of the cylinder to be switched in two steps, thereby, in the case of a steel plate or a wooden board, The best manpower is used for hitting homework. The tenth diagram shows the state in which the switching = paper bar 43 is switched to the steel plate mode suitable for the steel plate, and the eleventh figure: the switching lever 43 is not switched to the board which is suitable for wood boarding. The bottom portion held is provided for holding the switching lever 43 respectively. The position of the other-fruiting position and the position of the board mode keeps the compression portion of the convex portion 2d, and is disposed between the head cover 2b and the head cover 2b. The force is pushed toward the valve seat portion 41 (four) (the upper side in the figure) The urging body 43 is integrally attached to the fulcrum portion 42c of the valve main body 42. The recessed portion is held by the urging force of the compression spring 44 toward the force of 1 ==44 (4), and the appropriate movement resistance is applied. Πt η 私 私 私 私 切换 切换 切换 切换 切换 切换 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私 私When the force is in the steel plate mode, the large vent holes 42a to 42a having the same opening area are aligned with the valve seat reference vent holes 41a to 41a, respectively, so that the piston 22 J ± The compressed air pressure in the upper chamber 24 is substantially inconsistent with the gas rainbow. Therefore, when the piston in the steel plate mode is moved up, the valve main body 42 is pressed up. The pressure is pressed against the upper surface of the valve seat portion 41, thereby compressing the air toward | In the push chamber 24, the flow person and the upper chamber 24 Exhaust gas == t The total area of the vent holes 41a to 41a is different from the soil of the flow path area, and in the case of the wood shown in the thirteenth to sixteenth figures, with respect to the valve pedestal The three reference ventilations of the portion 41 are 41a, respectively aligned with the small opening areas 42 to 42b which are sufficiently smaller than this. Therefore, as shown in Fig. 14, the valve body 42 is formed in each of the reference vent holes The portion exposed to the inside of the upper chamber 24 of the cylinder functions as a pressure receiving surface 42d for receiving the air pressure of the upper chamber 24 of the gas red upper chamber when the piston is moved upward. Therefore, the compressed air repeatedly acts on the valve body 42 on the cylinder. The compressive air pressure in the second, second, 24 acts along the direction in which the valve body 42 overcomes the compression movement. The force of the compression spring 44 is properly applied to the gas red upper chamber 24 when the earth piston 22 is moved up. The internal pressure is again moved up by the valve body 42. The pressure can be shifted, and when the valve body 42 overcomes the contraction spring 44, the valve body 42 is moved upwards away from the upper surface of the valve seat portion 41: Like the gap, the upper chamber 24 of the piston is not only with the valve, L42al! 2:; ^ as described above, In the case shown in the tenth to twelfth drawings, the reference vent holes 41a to 41a with respect to the valve seat portion 41 are divided into 1354611 and the large vent holes 4 2 a of the valve main body 4 2 are not aligned, so the piston position time The flow rate of the inflow to the upper chamber 24 of the cylinder becomes large, and U = the driving force can be ensured, and the amount of exhaust per unit time in a large amount of 24 can be ensured, thereby: ::: two gas = room The smooth upward movement of the piston 22 is achieved. The efficiency of the back-and-drain is different. In the case of the thirteenth to the +th, the flow pattern wall of each board is not small when the piston moves down. The suction hole 1 of the upper air chamber 24 can be used to obtain a weaker driving force suitable for playing the wooden board. When the valve body 42 moves against the compression spring 44 when moving up, the flow path can be The area is automatically widened to maintain high exhaust efficiency, so that smooth movement of the piston 22 can be ensured under this condition. The monthly exhaust gas is returned to the inner venting chamber 30c of the head valve 3A via the flow rate switching valve 40. In this case, the head valve 3 is moved downward to close the holding sleeve, and the venting chamber 30c is in a state of being disconnected from the ventilating chamber 3b and the head valve lower chamber. Therefore, the exhaust gas is discharged to the exhaust chamber 30h on the outer peripheral side of the head valve 3A via the helium gas 1 provided on the head valve 3: r: Erfeng:: the exhaust path omitted from the figure It communicates with the exhaust chamber 8b, and communicates with the exhaust gas f8 in the handle π3. The flow of the compressed air (compressed air) to the atmosphere through the exhaust port 8a is: a plurality of exhaust holes 28 are provided on the circumferential surface of the side: only the seals are attached to the outer peripheral side by the outer ring side. Gas side) is airtightly sealed (check valve). Because the valve 4〇 upper chamber 24(10)4 is switched by the above flow rate ❿~2la^ two plants are also carried out by the vent hole 仏~. From the exhaust hole, the flow rate is similar to that of the flow rate switching valve 4. The exhaust gas J passes through the inside of 30c, and is then discharged to the exhaust chamber 30h via the exhaust holes 3〇g~3〇g 18 1354611. f 下 的 的 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 26 open stage, under the contraction ~ grab the compressed air from the venting chamber 33 into the return air chamber pan return air chamber 29, in live (4)
==返回軸下室25内，並作為用於將SI 上移的致動源而被利用。 土 22 此外，活塞22的下移端位置（下止點 限制。該阻尼器26及J1周详沾接士 ΑΑ> ^σο 26 a 相構成的軸情況表示於第四 圖及弟九财。該阻尼器26為將氣虹21的 = 地填塞的彈性體，本實施方式中，被可在 範 活塞移動方向（第四圖中為上下方向)位移=圍:： 貫Γ設有插通孔26a。在該插通孔^ 内可沿其軸向移動地插通有螺絲批頭23。 該阻尼1 26具備近似圓錐台形狀的主體部_、和從 主體部26b的下麵中心向下方延伸的支轴部*。主體部 26b的上部形成為其周面向越靠近上側直彳_小的方向傾 斜的圓錐台形狀。通過將該主體部26b的周面向形成於氣 叙21的下側開口部的傾斜面21c推壓，π — or . 以將氣缸下室 25與後述的通氣室33氣密性地密封。 該阻尼器26的支軸部26c穿過固定於主體罩殼％上 ，第-框體61的插通孔61a，以可沿轴向移動的狀態插入 支承在其下側同樣地固定於主體罩殼2a上的第二框體6〇 19 1354611 的支承孔60a中。在該第二框體60上，借助輛承53可轉 動地支承後述的氣動馬達50的上側的旋轉軸部51。 該阻尼器26吸收如第九圖所示活塞22到達下移端位 置時的衝擊，而且利用該活塞22的推力而向下側位移。本 實施方式中，該向下側位移的位置被設為阻尼器26的初始 位置。如後所述，通過活塞22到達下止點並使阻尼器26 向下側位移，將氣缸下室25與通氣室33連通，由此從通 氣室33向氣缸下室25供給壓縮空氣，其經由回送孔2ib 流入到回送空氣室29内。 • 在主體部26b的下麵且支軸部26c的周圍，遍及整周 地設有截面呈半圓形的凸部26d。上述第一框體61的上表 面61b位於該凸部26d的下方。通過利用扳機5的扣杈操 作，如第四圖所示地使該阻尼器26向上側位移，由此變為 該凸部26d離開第一框體61的上表面61b的狀態。該狀態 下，處於凸部26d的外周側的通氣室33與插通孔61a内連 通的狀態。如後所述，通氣室33經由通氣室32與頭閥内 周側的通氣室3Gb連通。因此，當頭閥3()被打開時開始打 • _初始的階段中，向通氣室⑽供給壓縮空氣，由此阻尼 器26從初始位置上移的狀態下，從蓄壓室7向氣動馬達 50供給壓縮空氣，由此氣動馬達5〇開始旋轉。 士與之不同’當如第九圖所示地阻尼器26向下側位移 W成為凸部26d被向第-框體61的上表面⑽推壓的狀 態。該狀態下，如上所述，成為通氣室33與氣缸下室25 連f的狀態，另一方面，成為通氣室33與插通孔61a、通 ，室馬達通氣口 52氣密性地密封的狀態。如後所述， 在该讀狀態下，成為從蓄壓室7向氣動馬達5()的壓縮空 20 1354611 氣的供給被截斷的狀態，而變為氣動馬達5 此外，當氣動馬達50通過扳機5的扣 、〜、 打開時，在其開始打開的初始階段中開而將頭閥 的下部内周側的通氣室30b經由通氣室：轉。頭閥30 馬達50的吸氣口 52連通。因此，'—、34與氣動 相對闕台座部35被關閉的狀能二圖所示頭閥30 壓室7截斷，因此無法進行被與蓄 供給^而氣動馬達5Q就變為停止的狀態。簡縮空氣的 當通過扳機5的扣拉操作將 並使頭閥30開始打開時，、H上i咖向大氣開放 與内周側的通氣室30b ^ ㈤外周侧的頭閥下室30d 空氣。壓縮空氣向通氣室3〇h S通氣室30b供給壓縮 的，即，頭間30上蔣而*〜5的彳，、給是從如下階段開始 之間產生間隙，由此节密封圈2以與頭閥30的内周面 3〇c連通^的_與頭閥内周側的通氣室 氣而活塞22開始下移之I、广在向通氣室30c供給壓縮空 _，由於通氣請 因此當壓縮空氣流入到dn通氣室33連通， 室33。流入到通氣室3 2 30b時’其也會流入到通氣 阻尼器26上移的仙。g、_空氣起到將向下側位移的 側的作為阻尼器26的主體^^狀態下，由於在位於下 側，通氣室33的壓縮*气二的下面且凸部26d的外周 因此該階段中該阻尼=^°將其向上側位移的方向作用， 26上移時，氣缸下室％攸其初始位置上移。當阻尼器 斷，並且通氣室33與通氣T氣f 33二·氣密性地截 室鳥的壓縮空氣經由通m通。因此，流入到通氣 、乱至34及馬達吸氣口 52向氣動 1354611 馬達50供給，這樣氣動馬達5〇就會開始旋轉。即，從頭 閥30開始打開後不久，首先氣動馬達50開始旋轉。' 在氣動馬達50的旋轉軸部51上，以遍及其整個長度 貫通的狀態設有截面呈圓形的批頭插通孔51a。螺絲批頭 23被以可繞轴相對旋轉且可沿軸向相對移動的狀態插通 於該批頭插通孔51a中。 一 而且，由於氣動馬達50本身是以往公知的所謂的葉片 式液壓馬達，因此對於其構成等省略詳細說明。D ^ 氣動馬達50的下侧的旋轉軸部53借助軸承54被可旋 Φ 轉地支承於在主體罩殼2a的前端部上安裝的第三框體63 上。在該第三框體63與上述第二框體6〇之間構成有氣動 馬達50。 氣動馬達50的下側的旋轉軸部55與減速機構部7〇 結合。本實施方式中，在該減速機構部70中使用行星齒輪 機構。在旋轉軸部55上安裝有太陽齒輪71。在該太陽齒 輪71上嚙合有兩個行星齒輪72、72。兩個行星齒輪72、 72與固定於主體罩殼2a上的内齒輪乃嚙合。這兩個行星 • 齒輪72、72由行星架73支承。行星架73借助軸承74被 可旋轉地支承在主體罩殼2a的前端上。 、在行星架73的中心，以沿著其中心軸線貫通的狀態形 〇有用於插通螺絲批頭23的插通孔73a。在該插通孔73a ，以可在輛向上相對位移且無法繞軸相對旋轉地一體化 的狀態插通有螺絲批頭23。 仃星架73的插通孔73a具有橢圓形截面。與之對應， f絲批頭23的軸向下侧大致一半的範圍中，與上述插通 3a的橢圓形截面對應地在沿著軸向較長的範圍中設有 22 1354611 相互平行且各自平坦的雙扁面部23a、23a。以在該螺絲批 頭23沿其軸向移動的全部範圍中使雙扁面部23a、23a常 時位於插通孔73a内的方式，在轴線方向上較長的範圍中 设置該雙扁面部23a、23a。通過這樣使雙扁面部23a、23a 常時位於行星架73的插通孔73a中，可以將螺絲批頭23 在繞其軸心的旋轉中與行星架73 一體化，由此經由行星架 73輸出的氣動馬達5〇的轉矩向螺絲批頭23傳遞。 如上所述’由於氣動馬達5〇的旋轉輸出通過減速機構 部70被減速而向螺絲批頭23傳遞，氣動馬達5〇及減速機 験構部70在主體部2的前端部且最靠近螺釘s的打入部位的 部位上將轉矩向螺絲批頭23傳遞’因此可以儘量不產生該 螺絲批頭23的扭曲地將轉矩（擰緊轉矩）有效地向螺釘s 施加。 在主體部2的下端，設有圓筒形的打入筒部13。螺絲 批頭23在s亥打入筒部13的内周側旋轉的同時來回移動。 在=打入筒部13的長邊方向中途位置，連接有上述螺釘連 結帶進給機構12。利用該螺釘連結帶進給機構12，每隔一 籲彳固間距地進給螺釘連結帶，從而與主體部2側的打入動作 連動地向打入筒部13内逐根地供給螺釘s。 σ在打入筒部13的前端部，為了防止螺釘打入材料W 的損曰傷乂而安裝有安裝了彈性片14a的托架14。打入筒部 —，著4托架14向螺釘打人材料w頂靠，在該狀態下進 订螺針S向螺針打入材料w的打入（緊固）。 如上所述地構成的本實财式的打敎機上，當 壓至7供給了壓縮空氣的狀態下對扳機5進行扣拉 呆日、頭閥上室30a向大氣開放而使頭閥3〇上移。當頭 23 1354611 在其開始打開的初始階段，首先t 30b供給壓縮空氣，1又自元肉通軋至 乱具超由通氣室32流入到通氣官<^。合 向通氣室33供給壓縮空氣時 直 ’、 田 如柃仂署l·於λ, , ^通過其壓力，阻尼器26從 置#，由此成為將氣缸下室25封閉，且通翁官 π mf 悲'。迫樣，畜壓室7與通氣室30b、 ^核，從而向氣動馬達5G供給壓縮空.氣，由 此氣動馬達50開始旌鐘。.s^田 SM Μ —堅·^ %轉通過亂動馬達50旋轉，螺絲批 頭向擰緊方向旋轉。== returns to the lower shaft chamber 25 and is utilized as an actuating source for moving the SI up. In addition, the position of the lower end of the piston 22 (bottom stop limit. The damper 26 and J1 are carefully attached to the gentry). The axis of the phase is shown in the fourth figure and the brother Jiu Cai. The actuator 26 is an elastic body that fills the ground of the gas rainbow 21, and in the present embodiment, it is displaceable in the moving direction of the fan piston (upward and downward direction in the fourth drawing) = circumference: the insertion hole 26a is provided. A screwdriver bit 23 is inserted into the insertion hole 2 so as to be movable in the axial direction thereof. The damping 1 26 has a main body portion _ approximately a truncated cone shape, and a fulcrum extending downward from a lower center of the main body portion 26b. The upper portion of the main body portion 26b is formed in a truncated cone shape whose outer peripheral surface is inclined toward the direction in which the upper side is smaller than the upper side. The circumferential surface of the main body portion 26b is formed on the inclined surface of the lower opening portion of the gas 21 21c is pressed, π - or . The cylinder lower chamber 25 is hermetically sealed with a ventilation chamber 33 which will be described later. The fulcrum portion 26c of the damper 26 is fixed to the main body casing %, and the first frame 61 The insertion hole 61a is inserted and supported in the axially movable state on the lower side thereof and is fixed to the main body in the same manner. In the support hole 60a of the second frame body 6〇19 1354611 on the body casing 2a, the upper frame rotating shaft portion 51 of the air motor 50 to be described later is rotatably supported by the carrier 53 on the second frame body 60. The damper 26 absorbs the impact when the piston 22 reaches the lower shift end position as shown in the ninth diagram, and is displaced downward by the thrust of the piston 22. In the present embodiment, the position of the downward displacement is set to The initial position of the damper 26. As will be described later, the piston 22 reaches the bottom dead center and the damper 26 is displaced downward, and the cylinder lower chamber 25 is communicated with the venting chamber 33, thereby from the venting chamber 33 to the lower cylinder chamber. The compressed air is supplied to the return air chamber 29 via the return hole 2ib. • A convex portion 26d having a semicircular cross section is provided over the entire circumference of the main body portion 26b and around the support shaft portion 26c. The upper surface 61b of the first frame body 61 is located below the convex portion 26d. By the snap operation of the trigger 5, the damper 26 is displaced upward as shown in the fourth figure, thereby becoming the convex portion 26d. a state of leaving the upper surface 61b of the first frame 61. In this state, The ventilation chamber 33 on the outer peripheral side of the convex portion 26d communicates with the inside of the insertion hole 61a. As will be described later, the ventilation chamber 33 communicates with the ventilation chamber 3Gb on the inner circumference side of the head valve via the ventilation chamber 32. Therefore, the head valve 3 ( When the initial stage of the opening is started, compressed air is supplied to the ventilation chamber (10), and the damper 26 is supplied with compressed air from the pressure accumulation chamber 7 to the air motor 50 while being moved upward from the initial position. When the air motor 5 turns, the rotation of the air motor is different. When the damper 26 is displaced downward as shown in the ninth figure, the convex portion 26d is pressed against the upper surface (10) of the first frame 61. In this state, as described above, the ventilation chamber 33 and the cylinder lower chamber 25 are connected to each other, and the ventilation chamber 33 and the insertion hole 61a are opened, and the chamber motor vent 52 is hermetically sealed. . As will be described later, in the read state, the supply of the compressed air 20 1354611 from the pressure accumulating chamber 7 to the air motor 5 () is cut off, and becomes the air motor 5. Further, when the air motor 50 passes the trigger When the buckle of the 5 is opened, the opening is opened in the initial stage of the opening, and the ventilation chamber 30b on the lower inner circumference side of the head valve is rotated through the ventilation chamber. The suction port 52 of the head valve 30 motor 50 is in communication. Therefore, the head valve 30 pressure chamber 7 is cut off from the state in which the air cylinders are closed, and the air cylinders 7 are stopped. Therefore, the air motor 5Q cannot be stopped. When the pull-out operation by the trigger 5 causes the head valve 30 to start to open, the air is opened to the atmosphere and the air chamber 30b on the inner circumference side (5) the head valve lower chamber 30d on the outer peripheral side. The compressed air is supplied to the ventilating chamber 3 〇h S venting chamber 30b, that is, 彳 蒋 〜 〜 头 头 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳 彳The inner peripheral surface 3〇c of the head valve 30 communicates with the ventilating chamber gas on the inner peripheral side of the head valve, and the piston 22 starts to move downward, and the compressed air _ is supplied to the ventilating chamber 30c. Air flows into the dn plenum 33 to communicate with the chamber 33. When flowing into the venting chamber 3 2 30b, it also flows into the ventilator damper 26. g, _ air acts as the main body of the damper 26 on the side that is displaced to the lower side, since it is located on the lower side, the compression chamber 33 is compressed below the air and the outer circumference of the convex portion 26d is thus the stage The damping = ^ ° acts in the direction of the upward displacement, and when the 26 moves up, the cylinder lower chamber % 攸 its initial position moves up. When the damper is broken, and the venting chamber 33 and the venting T gas f 33 are airtight, the compressed air of the cockpit is passed through. Therefore, the inflow to the air, the mess 34 and the motor intake port 52 are supplied to the pneumatic 1354611 motor 50, so that the air motor 5 turns to start rotating. That is, shortly after the head valve 30 is opened, the air motor 50 starts to rotate first. On the rotating shaft portion 51 of the air motor 50, a bit insertion hole 51a having a circular cross section is provided in a state of being penetrated throughout its entire length. The screwdriver bit 23 is inserted into the bit insertion hole 51a in a state of being relatively rotatable about the axis and relatively movable in the axial direction. In addition, since the air motor 50 itself is a conventionally known so-called vane type hydraulic motor, detailed description thereof will be omitted. D ^ The lower rotary shaft portion 53 of the air motor 50 is rotatably supported by a third frame 63 attached to the front end portion of the main body casing 2a via a bearing 54. A pneumatic motor 50 is formed between the third frame body 63 and the second frame body 6''. The lower rotating shaft portion 55 of the air motor 50 is coupled to the speed reducing mechanism portion 7A. In the present embodiment, a planetary gear mechanism is used in the speed reduction mechanism portion 70. A sun gear 71 is attached to the rotating shaft portion 55. Two planetary gears 72, 72 are engaged on the sun gear 71. The two planetary gears 72, 72 are engaged with the internal gear fixed to the main body casing 2a. These two planets • gears 72, 72 are supported by planet carrier 73. The carrier 73 is rotatably supported on the front end of the main body casing 2a via a bearing 74. In the center of the carrier 73, an insertion hole 73a for inserting the screwdriver bit 23 is formed in a state of being penetrated along the central axis thereof. In the insertion hole 73a, the screwdriver bit 23 is inserted in a state in which the vehicle can be relatively displaced in the upward direction and is not rotatable relative to the shaft. The insertion hole 73a of the comet frame 73 has an elliptical cross section. Correspondingly, in the range of approximately half of the axial lower side of the f-wire bit 23, 22 1354611 is provided in parallel with each other in the axially long range corresponding to the elliptical cross section of the above-mentioned insertion 3a, and each is flat Double flat faces 23a, 23a. The double flat surface portion 23a is disposed in a range long in the axial direction so that the double flat surfaces 23a, 23a are constantly positioned in the insertion hole 73a in the entire range in which the screwdriver bit 23 moves in the axial direction thereof. 23a. By thus positioning the double flat faces 23a, 23a in the insertion holes 73a of the carrier 73, the screwdriver bit 23 can be integrated with the carrier 73 in rotation about its axis, thereby being output via the carrier 73. The torque of the air motor 5 turns to the screwdriver bit 23. As described above, the rotation output of the air motor 5 is transmitted to the screwdriver bit 23 by the deceleration mechanism unit 70, and the air motor 5 and the reduction gear mechanism 70 are at the front end portion of the main body portion 2 and closest to the screw s. The torque is transmitted to the screwdriver bit 23 at the portion of the driving portion. Therefore, the torque (tightening torque) can be effectively applied to the screw s without causing the distortion of the screwdriver bit 23 as much as possible. At the lower end of the main body portion 2, a cylindrical driving cylinder portion 13 is provided. The screw bit 23 moves back and forth while the inner circumference side of the cylinder portion 13 is rotated. The screw coupling belt feeding mechanism 12 is connected to the middle position in the longitudinal direction of the driving cylinder portion 13. By the use of the screw to the belt feeding mechanism 12, the screw coupling belt is fed every other time, and the screw s is supplied one by one to the driving cylinder portion 13 in conjunction with the driving operation on the main body portion 2 side. σ is inserted into the front end portion of the tubular portion 13, and the bracket 14 to which the elastic piece 14a is attached is attached in order to prevent damage to the screw W from being driven by the screw. When the cylinder is driven, the four brackets 14 abut against the screw hitting material w, and in this state, the screwing of the screw S into the screw driving material w is pushed (fastened). In the snoring machine of the present invention, which is configured as described above, the trigger 5 is pulled in a state where the compressed air is supplied to the state of 7, and the head valve upper chamber 30a is opened to the atmosphere to cause the head valve 3 to be closed. Move up. When the head 23 1354611 is in the initial stage of its opening, first, t 30b is supplied with compressed air, and 1 is again rolled from the raw meat to the chaos to flow from the venting chamber 32 to the ventilator <^. When the compressed air is supplied to the venting chamber 33, the damper is erected by the damper 26, and the damper 26 is closed from the ventilator 26, thereby closing the cylinder lower chamber 25, and Mf sad. Forcibly, the animal pressure chamber 7 and the ventilation chamber 30b and the core are supplied with compressed air to the air motor 5G, and the air motor 50 starts the chirp clock. .s^田 SM Μ —Jing·^ % turns by the tampering motor 50, and the screwdriver head rotates in the tightening direction.
y m頭闕3〇充分地打開時，經由通氣室_向通 二t二…。壓縮空氣’其經由流量切換閥4〇 *氣缸上室 24内供:5 ’這樣活塞22就會下移。如果活塞&下移，則 螺”’糸=23 -體地下移。從而，螺絲批頭23 —邊通過氣 動馬達5〇 ^擰緊方向旋轉，一邊通過活塞22向螺釘打入 方向下私it4K將向打入筒部13内供給的一根螺釘s利用 螺絲批頭23向螺釘打人材料W打人的同時進行緊固。 在活塞22 τ移的過程中，氣紅下室25的壓縮空氣的 邠刀、、歪=螺絲批頭23的周圍即阻尼器26的插通孔26a 等而開放’剩餘的部分經由回送孔21b〜21b流入到 回运空，室29内而被蓄壓’從而使活塞22順暢地下移。 通過活塞22順暢地下移，將螺$TS_螺絲批頭23打入 到螺釘打入材料W中。 當如第九圖所示活塞22與阻尼器26抵接而到達下移 端（下^點）時，螺釘s的打入（擰入）結束。如圖所示， 通過活塞22到達下移端而與阻尼器26彈性地抵接，可吸 收其衝擊。另外，利用活塞22抵接的動作（活塞22的推 力），阻尼器26向下側位移。 24 1354611 當阻尼器26向下侧位移時，I 21的下侧開口部，其結果，在阻尼、=26b脫離氣虹 間的整周產生間隙26e，從而成為經門、=面，之 ^ 通氣；====， 氣b,口一室29内供給活塞返回用的足夠的 截斷’因此_空氣向馬達吸氣二的連通狀態 可:止螺钉8向螺針打入材料W中的過度緊固。丁），所 二後，當使用者停止扳機5的扣 的狀態時，成為利用密封:二a、:：351密性地抵接 ，，並將通氣室30b與頭闕下室^至截3斷0c ^氣^ =氣向氣-上室24的供給被截斷。截當 4 f的供給被截斷時，該氣缸上室24内的; 二：為可經由流量切換閥4〇、排氣孔2 ::: =孔30g〜·、排氣室3〇h及 = 的狀態（料絲22不產生下移方⑽;^開放 25 1354611 當這樣頭閥30被關閉而壓縮空氣向氣缸上室24的供 給被截斷，且該氣缸上室24可向大氣開放的狀態時，、、舌夷 22通過被在回送魏室29内蓄壓的㈣空氣而返回到1 止點。 另外，在頭閥30被關閉了的狀態下，壓縮 室33的供給被戴斷，因此阻尼器加被 =。、氣 的狀態（阻尼器26的初始位置）。、#、向下側位移 如上說明所*，根據本實施方式的打螺 馬達50配置於比氣缸21更靠打入方，氣動When the y m head 阙 3 〇 is fully opened, it passes through the venting chamber _ toward the second two... The compressed air 'passes through the flow switching valve 4 〇 * in the upper chamber 24 of the cylinder: 5 ' such that the piston 22 moves downward. If the piston & moves down, the screw "'糸=23 - body moves underground. Thus, the screwdriver bit 23 is rotated by the air motor 5〇^, and the piston 22 is driven in the direction of the screw. A screw s supplied into the driving cylinder portion 13 is tightened while hitting the screw hitting material W by the screwdriver bit 23. During the movement of the piston 22, the compressed air of the gas red lower chamber 25 The boring tool, the cymbal=the periphery of the screwdriver bit 23, that is, the insertion hole 26a of the damper 26, and the like are opened, and the remaining portion flows into the return air through the return holes 21b to 21b, and is accumulating in the chamber 29, thereby The piston 22 moves smoothly downward. By the smooth movement of the piston 22, the screw $TS_ screwdriver bit 23 is driven into the screw driving material W. When the piston 22 abuts the damper 26 as shown in the ninth figure, it reaches the lower portion. At the end (lower point), the driving (screwing) of the screw s is completed. As shown in the figure, the piston 22 reaches the lower moving end and elastically abuts against the damper 26, thereby absorbing the impact. The action of the piston 22 abutting (the thrust of the piston 22), the damper 26 is displaced to the lower side. 24 135461 1 When the damper 26 is displaced to the lower side, the lower opening portion of I 21, as a result, the gap 26e is generated over the entire circumference between the damping and =26b from the gas rainbow, thereby becoming a passage, a face, and a ventilation; ====, gas b, sufficient cutoff for the return of the piston in the chamber 29. Therefore, the communication state of the air to the motor 2 can be: excessive tightening of the screw 8 into the screw W into the material W After the second, when the user stops the state of the buckle of the trigger 5, the seal is used: the second a::: 351 is intimately abutted, and the ventilation chamber 30b and the head squat chamber are cut off. 3断0c^气^=The supply of gas to gas-upper chamber 24 is cut off. When the supply of cut 4f is cut off, the cylinder is in the upper chamber 24; Hole 2 ::: = hole 30g~·, exhaust chamber 3〇h and = state (filament 22 does not produce downward movement (10); ^ open 25 1354611 when such head valve 30 is closed and compressed air is directed to the upper chamber of the cylinder When the supply of the cylinder 24 is interrupted and the cylinder upper chamber 24 is open to the atmosphere, the tongue 22 is returned to the 1st stop position by the (4) air stored in the return chamber 29. When the head valve 30 is closed, the supply of the compression chamber 33 is broken, so the damper is added, the state of the gas (the initial position of the damper 26), #, and the downward displacement are as described above. *, the screwing motor 50 according to the present embodiment is disposed closer to the cylinder 21 than the cylinder 21, pneumatically
樣，由於在更靠近螺釘打入部的部位將置。這 變形的其實質上的長度會變短，從而可 而進行有效的轉矩傳遞。另外，氣動馬達=== = 罩设2a上（無法向打入方向移動地固 ；一 塞22—體地移動的情况相比 ，因此與其和活 抑制打入時的反作用。 而且，本實施方式的情況下1 轉輸出減速的減速機構部7Q配 ⑧動馬達50的狄In this case, it will be placed at a position closer to the screw driving portion. The substantial length of this deformation is shortened so that effective torque transmission can be performed. In addition, the air motor === = the cover 2a (cannot be moved in the driving direction; when the plug 22 is physically moved, the reaction is inhibited when it is driven in.) In the case of 1 speed-down deceleration mechanism part 7Q with 8 motor motor 50
前端似餘賴釘咐认錢料達50更靠 的部位。另外，減速機構部；被上 定於主體罩殼2a 的位置n人方向移動地固 轉輸出被轉於將螺雜頭 减相構部的狄 插通在橢圓形截面的插通孔％ ‘ ^部23a、23a = 23的繞著其軸的旋轉一靜 ，狀悲，由此螺絲批颌 (轉矩傳遞部）。 " 而向该螺絲批頭23傳遞 傳遞Γ二擰緊轉矩的部位， 與螺絲批頭23的前端部之間的 26 1354611 ^常時被維持於比以往更短的狀態，因此 產生該螺絲批頭23的扭曲變 土本上不 出的氣動3逵Μ 也將由減速機構部70輸 孔動馬達50陳轉輪出有效地向螺釘傳遞。 另外’減速機構部70、氣動馬達 沿打入方向移動地固定於體 _ 21被無法 動的主要部件只是因此沿該方向移 疋/舌基22和螺絲批頭23，由此可以脾;η· 入時的主體部2向上方的 ^由此了以將打 以進行可靠的螺釘打人。㈣為最小限度，從而可 另外’氣動馬達50配置於比知土 管8的部位，因此很容易將自k e部3内的排氣 徑縮r簡單化，二 =:== 的打入方向大致中錢近，因此 、版罩议2& 容易設定於比把手部3更靠打人2讀螺釘機1的重心 釘播1沾舌、更罪打入方向前端侧。通過將打螺 t d的知況下’將該打 (打人μ邻m #17·^ …丁機1的打入方向前端側 以鬆的姿勢來進行握持’因此可 雖妙兒明的Λ施方式可以增加各種變更。例如， 機構部7。例示 二:: 速機構部。$ 4附和螞輪構成的減速機構作為減 另外，雖然例示了將螺絲批碩 插通於橢圓形的插通孔73中p、又扁面σΡ 23a、23a 匕73中而進行從減速機構部70到螺 27 1354611 絲批頭23的轉矩傳遞的構成，但是並不限定於此，減速機 構^側的插通孔形狀*與之職的螺雜賴截面形狀是 任思的，、要是圓形以外的形狀，則也可以是橢圓形、六 角形、四角料，或者也可以使用紐絲卿構造等用 於實現容許㈣的相對移動並一體地旋轉的各種形態。The front end seems to rely on the nails to recognize the money to reach 50 more. Further, the speed reduction mechanism portion is fixed to the position of the main body casing 2a, and the fixed rotation output is rotated to the insertion hole of the elliptical cross section of the screw head portion. The rotation of the portion 23a, 23a = 23 about its axis is static and sorrowful, thereby the screwdriver jaw (torque transmitting portion). " The portion where the second tightening torque is transmitted to the screwdriver bit 23 is maintained at a shorter state than the conventional 26 1354611 ^ at the tip end portion of the screwdriver bit 23, so that the screwdriver bit is generated The pneumatic 3 不 which is not deformed by the twisted soil of 23 will also be effectively transmitted to the screw by the speed reducing mechanism unit 70. Further, the main part of the 'deceleration mechanism unit 70 and the air motor that is fixed to the body _ 21 in the driving direction and is not movable is only moved in this direction/the tongue base 22 and the screwdriver bit 23, thereby being spleen; The main body portion 2 that is in the upper direction is thus wounded to strike a reliable screw. (4) In the minimum, the air motor 50 can be disposed in the portion of the concrete pipe 8, so that it is easy to simplify the exhaust pipe diameter in the ke portion 3, and the driving direction of the second =:== is substantially In the case of the money, it is easy to set the door 2 to be more than the handle portion 3, and the center of gravity of the screw machine 1 is pinned to the front end side. In the case of the snail td, the snail can be held in a loose posture by the front end side of the driving direction of the machine. Various modifications can be added to the embodiment. For example, the mechanism unit 7. The second embodiment: the speed mechanism portion. The deceleration mechanism composed of the $4 attachment and the grass wheel is used as a subtraction, although the insertion of the screwdriver into the elliptical insertion hole is exemplified. 73, p, and flat σ Ρ 23a, 23a 匕 73, the torque transmission from the speed reduction mechanism unit 70 to the screw 27 1354611 wire head 23 is performed. However, the present invention is not limited thereto, and the insertion of the speed reduction mechanism ^ side is not limited thereto. The shape of the hole* and the shape of the snail cross section of the job are arbitrary. If the shape is other than a circle, it may be an ellipse, a hexagon, a square, or a Neuswick structure. Various forms that allow relative movement of (4) and rotate integrally.
，外如果至少將減逮機構部7〇固定於主體部2 (主 體罩λ又2a)的&端部，則g卩使是氣動馬達與活塞—體地來 回移，的構錢麵動馬達配置於比氣缸更靠後部側的構 主相比’也可以抑制打入時的反作用而且抑制螺 ，，.糸批頭23的㈣變形並進行有效的轉矩傳遞。 郊本發明也可以相於不具備所例示的減速機構 ;:二：。該情況下，氣動馬達5〇的旋轉輸出未被減 速而按原樣不變地向螺絲批頭23傳遞。該 通過將氣動馬達5G無法沿打人方向地^ ^ 的前端側來獲得同等的仙效果。主體^ 【圖式簡單說明】If at least the lowering mechanism portion 7 is fixed to the & end portion of the main body portion 2 (the main body cover λ and 2a), then the pneumatic motor and the piston are physically moved back and forth. Compared with the main body on the rear side of the cylinder, it is also possible to suppress the reaction at the time of driving and to suppress the snail, and the (four) deformation of the bit 23 is performed and effective torque transmission is performed. Suburban inventions may also be associated with the illustrated speed reduction mechanism; In this case, the rotational output of the air motor 5A is not decelerated and is transmitted to the screwdriver head 23 as it is. This achieves the same effect by making the air motor 5G unable to follow the front end side of the hitting direction. Main body ^ [Simple description]
第-圖是本實施方式涉及的打螺 視圖。本圖表料初錄態。 _㈣的縱U 叫』實Γ式涉及的打螺針機的主體部的縱向 口J視圖本圖表不主體部的初始狀態。 第三圖是第二圖的局部放大圖， 邊的縱向剖視圖。本圖盘第—gj才 岣及虱 ° 狀態下的頭_全=態圖相R ’表示主體部的初始 表干==:部及阻尼器周邊的敏向剖視圖。本圖 =阻尼心下側的初始位置上移而氣動馬達開始旋轉的 28 1354611 第五圖是本實施方式涉及的打螺釘機的主體部的縱向 剖視圖。本圖表示頭閥處於半開狀態且氣動馬達開始旋轉 的階段。該階段中，活塞仍位於上止點。 第六圖是本實施方式涉及的打螺釘機的主體部的縱向 剖視圖。本圖表示頭閥處於全開狀態且氣動馬達旋轉而活 塞開始下移的階段。 第七圖是第六圖的局部放大圖，是全開的頭閥及氣缸 上部周邊的縱向剖視圖。本圖中表示頭閥全開而開始下移 的活塞。 • 第八圖是本實施方式涉及的打螺釘機的主體部的縱向 剖視圖。本圖表示活塞到達下止點，其結果氣動馬達停止 而結束螺釘的打入的階段。 第九圖是第八圖的局部放大圖，是到達了下止點的活 塞及阻尼器周邊的放大圖。本圖中表示阻尼器被活塞推壓 而下移，其結果將氣動馬達用的通氣路關閉的狀態。 第十圖是從第一圖中的箭頭（10)方向看主體部的後 視圖。本圖中表示操縱桿被切換到打鋼板用的鋼板模式位 Φ 置上的狀態。 第十一圖是第十圖的（11) 一（11)線剖面向視圖。 本圖表示頭閥周邊的内部構造的縱截面。 第十二圖是第十一圖的（12) — (12)線剖面向視圖。 本圖表示切換閥的閥台座部及頭閥的橫截面。 第十三圖是主體部的後視圖。本圖中表示將操縱桿切 換到打木板用的木板模式位置上的狀態。 第十四圖是第十三圖的（14) — (14)線剖面向視圖。 本圖中表示切換閥的閥台座部及頭閥的橫截面。 29 1354611 本圖G五十四圖的（15)、（15)線剖面向視圖。 本圖中表不切換間_台座部及頭間的橫截面。㈣ 第十六圖是主體部的上部錢量 視圖。本圖表示活塞上料的流量、的縱向剖 由在閥台座部朗主體之間產生的㈣結果經 【主要元件符號說明】The first figure is a screwing view according to the present embodiment. This chart is recorded at the beginning. The vertical U of _(4) is the longitudinal direction of the main body of the screw machine involved in the actual type. The view is not the initial state of the main body. The third figure is a partial enlarged view of the second figure, a longitudinal sectional view of the side. The head_gj 岣 and 头 ° state of the head _ full = state diagram phase R ′ represents the initial surface of the main body ==: part and the sensible section around the damper. This figure is a vertical cross-sectional view of the main body portion of the screwing machine according to the present embodiment, in which the initial position of the lower side of the damper is moved up and the air motor starts to rotate. This figure shows the stage in which the head valve is half open and the air motor begins to rotate. In this phase, the piston is still at top dead center. Fig. 6 is a longitudinal cross-sectional view of the main body portion of the screwing machine according to the embodiment. This figure shows the stage in which the head valve is fully open and the air motor rotates and the piston begins to move down. The seventh drawing is a partially enlarged view of the sixth drawing, which is a longitudinal sectional view of the fully open head valve and the periphery of the upper portion of the cylinder. This figure shows the piston with the head valve fully open and starting to move down. Fig. 8 is a longitudinal cross-sectional view of the main body portion of the screwing machine according to the embodiment. This figure shows that the piston reaches the bottom dead center, and as a result, the air motor stops and the screw is driven in. The ninth drawing is a partially enlarged view of the eighth figure, which is an enlarged view of the piston and the periphery of the damper which have reached the bottom dead center. In the figure, the damper is pushed down by the piston and moved downward, and as a result, the air passage for the air motor is closed. The tenth view is a rear view of the main body portion as seen from the direction of the arrow (10) in the first figure. In the figure, the joystick is switched to the state in which the steel plate mode position Φ for the steel plate is set. The eleventh figure is a cross-sectional view of the (11)-(11) line of the tenth figure. This figure shows a longitudinal section of the internal structure around the head valve. Figure 12 is a cross-sectional view of the line (12) - (12) of the eleventh figure. This figure shows the cross section of the valve seat and the head valve of the switching valve. The thirteenth picture is a rear view of the main body. This figure shows the state in which the joystick is switched to the position of the board mode for the board. Figure 14 is a cross-sectional view of the line (14) - (14) of the thirteenth figure. In the figure, the cross section of the valve seat portion and the head valve of the switching valve is shown. 29 1354611 The cross-sectional view of the lines (15) and (15) of Figure G. In this figure, the cross section between the pedestal and the head is not switched. (iv) Figure 16 is the upper view of the volume of the main body. This figure shows the flow rate of the piston feed, and the longitudinal section is generated between the main body of the valve seat. (4) Results [Description of main components]
1···打螺釘機 2···主體部 2a···主體罩殼 2b…頭罩殼 2c···凹部 2d ·位置保持凸部（鋼板模式用）， 2e .位置保持凸部（木板模式用）， 3…把手部 4···觸發閥 5…扳機 S…螺釘 W··’螺釘打入材料， W1···表面材（石膏板）， W2···底材（鋼板或木板）， 6···通氣軟管 7…蓄壓室 8…排氣管 8a···排氣口 1354611 8b…排氣室 11…釘倉 12…螺釘連結帶進給機構 13…打入筒部 14…托架（bracket) 14a···彈性片 20…擊打機構部 21…氣缸 21a···排氣孔 21b···回送孔 21c···傾斜面 22…活塞 23···螺絲批頭 23a···雙扁面部 24…氣缸上室 25···氣缸下室 26…阻尼器（下止點側） 26a···插通孔 26b···主體部 26c···支轴部 26d···凸部 26e·.·間隙 27…保持套筒 2 7 a…密封圈 31 1354611 28…密封圈 29…回送空氣室 30···頭閥 30a···頭閥上室 30b···通氣室 30c···通氣室 30d···頭閥下室 30e···受壓面（外周側） 30f···受壓面（内周側） 30g…排氣孔 30h···排氣室 31…壓縮彈簧 32…通氣室 33…通氣室 34…通氣室 3 5…閥台座部 40…流量切換閥 41…閥台座部 41a···基準通氣孔 42…閥主體 42a···大通氣孔 42b…小通氣孔 42c…支轴部 42d…受壓面 32 1354611 42e···間隙 43…切換操縱桿 44…壓縮彈簧 45…小螺釘 50…氣動馬達 51…旋轉軸部 5 la···批頭插通孔 5 2…馬達通氣口 5 3…軸承 54…軸承 5 5…旋轉軸部 60…第二框體 60a···支承孔 61…第一框體 61a“·插通孔 61b···上表面 63…第三框體 70…減速機構部 71…太陽齒輪 72…行星齒輪 73…行星架 73a···插通孔 7 4…軸承 75…内齒輪1··· Screw machine 2·· Main body part 2a··· Body cover 2b... Head cover 2c···Recessed part 2d ・Position holding convex part (for steel plate mode), 2e. Position holding convex part (wooden board Mode use), 3...handle part 4···trigger valve 5...trigger S...screw W··'screw-in material, W1···surface material (gypsum board), W2···substrate (steel plate or wood board) ), 6···ventilating hose 7...accumulation chamber 8...exhaust pipe 8a···exhaust port 1354611 8b...exhaust chamber 11...spinner 12...screw coupling belt feeding mechanism 13...into the cylinder 14...bracket 14a···elastic sheet 20...hitting mechanism unit 21...cylinder 21a···exhaust hole 21b···return hole 21c···inclined surface 22...piston 23···screw batch Head 23a···double flat surface 24...cylinder upper chamber 25··cylinder lower chamber 26...damper (bottom stop side) 26a··· insertion hole 26b··· main body part 26c··· fulcrum part 26d··· convex portion 26e·. clearance 27... holding sleeve 2 7 a... sealing ring 31 1354611 28... sealing ring 29...returning air chamber 30···head valve 30a···head valve upper chamber 30b·· · Ventilation chamber 30c···ventilation chamber 30 d···head valve lower chamber 30e···pressure receiving surface (outer circumferential side) 30f···pressure receiving surface (inner circumferential side) 30g...exhaust hole 30h···exhaust chamber 31...compression spring 32...ventilation Chamber 33...ventilation chamber 34...ventilation chamber 3 5...valve base portion 40...flow rate switching valve 41...valve seat portion 41a···reference vent hole 42...valve body 42a···large vent hole 42b...small vent hole 42c... Shaft portion 42d...pressure receiving surface 32 1354611 42e··· gap 43...switching lever 44...compression spring 45...screw 50...air motor 51...rotating shaft portion 5 la···batch insertion hole 5 2...motor Vent port 5 3...bearing 54...bearing 5 5...rotating shaft portion 60...second housing 60a··support hole 61...first housing 61a”·insertion hole 61b···upper surface 63...third frame Body 70...speed reduction mechanism portion 71...sun gear 72...plane gear 73...plane 73a···through hole 7 4...bearer 75...internal gear