200405843 玖、發明說明： 【發明所屬之技術領域】 本發明為關於使供給至形成釘子射出口的頭部（η 〇 s e ) 之釘子，以傳動器驅動至該射出口内而自射出口内打出， 同時，使抵接被釘入材料而操作之接觸元件突出配置在前 述頭部的先端方向，如此之打釘機，更詳細為關於打釘機 的接觸元件之連結機構。 【先前技術】 在以壓縮空氣作為動力源驅動打擊活塞而打出釘子之 打釘機中，在形成打釘機主體的中空狀之外殼内配置有可 摺動自如地收容打擊活塞之打擊氣缸，藉由配置在前述打 擊氣缸上端之主閥對打擊氣缸内導入壓縮空氣。在一體形 成於前述外殼之把手（g r i p )部的内部形成有貯留自壓縮空 氣供給源來的壓縮空氣之空氣室，主閥藉空氣室接續至打 擊氣缸内，空氣室内的壓縮空氣可被導入打擊氣缸内而驅 動打擊活塞。又，在把手部之基部配置有為了控制前述主 閥之啟發閥（f r i g g e r v a 1 v e )，該啟發閥為藉手動操作在把 手部的下部形成之啟發桿而動作。 在前述打釘機本體之下方安裝形成有釘子射出口之頭 部，在頭部的釘子射出口内可摺動地導引一體安裝於前述 打擊活塞下面的傳動器。在形成於上述頭部的釘子射出口 側面之開口 ，一體連設釘子供給導引部，在前述釘子供給 導引部的後部連結收容有多數互相連結的釘子之釘匣，藉 沿著前述釘子供給導引部所配置之釘子供給機構使釘匣内 5 312/發明說明書(補件)/92-10/92119797 200405843 的連結釘依次被供給至上述頭部之釘子射出口内。 上述打釘機為在一體形成於本體之把手部的基部上形 成啟發（f r i g g e r )機構，藉把持把手之手指而操作前述啟發 桿時該啟發機構則被操作而使打釘機起動。又在打釘機 上，被形成有摺動自如地設在沿著頭部之釘子打出方向， 同時突出在頭部的射出口前方所配置之接觸機構，頭部的 釘子射出口之先端抵壓被釘入材料，而使前述接觸機構操 作，藉前述啟發機構其則可使打釘機起動。 先前之接觸機構為，如圖 7 ( a )及圖 7 ( b )所示，其 為由突出在頭部1的射出口 2之先端方向所配置的接觸元 件 3 ;及，下端部被連結在前述接觸元件3之上端部而配 置在上述啟發機構旁邊之接觸臂 4 ;如此所構成，接觸元 件3被形成大致呈圓筒狀，其對可摺動自如地被裝著在形 成上述頭部1之下部的釘子射出口之圓筒狀部的外周上， 沿著射出口 2方向可摺動地導引頭部1。接觸臂4和接觸 元件3之結合部，如圖8所示，互相繫合形成在兩者的接 合面之橫方向的凹凸條5、6，自形成在接觸元件3側之開 口 8使固定螺絲7螺合於形成在接觸臂4之陰螺絲9而使 兩者固定結合。 上述先前的接觸元件3和接觸臂4之結合構造，雖然藉 繫合形成在水平方向的凹凸部 5、6來接受在接觸元件 3 和接觸臂4間起作用之上下方向的操作負荷，但由於接觸 元件3的摺動軸線和接觸臂4上端部之作用點被設定為自 前述軸方向脫離，因此，在接觸元件3和接觸臂4的結合 6 312/發明說明書(補件)/92-10/92119797 200405843 部會發生扭曲之作用力。因此，為了不因該扭曲力 觸元件3和接觸臂4的結合部變成扭曲狀而形成多 相繫合之水平方向的凹凸條5、6之條數，同時，設 條5、6之寬度方向有大的尺寸，結果，結合部會變 害頭部 1之先端部的細小化，而會使釘子的釘入處 視性惡化等而損壞其作業性。 【發明内容】 本發明為解決上述接觸元件和接觸臂之連結機 題點，其課題為可使頭部之釘子射出口的先端部形 化，而提供有良好的被釘入處所辨視性的打釘機。 為了解決上述課題，本發明之打釘機為，在形成 本體之中空狀的外殼内配置有可摺動自如地收容打 之打擊氣缸，在前述外殼下部設置形成釘子射出 部，形成啟發桿的手動操作和先端藉使對被配置在 部之射出口的先端部之接觸機構的被釘入材料操作 動之啟發機構，藉該啟發機構的作動而導入壓縮空 述打擊氣缸内並驅動打擊活塞，藉在打擊活塞上結 動器使被供給至前述釘子射出口内之釘子，自釘子 朝向被釘入材料打出，如此所成之打釘機，前述接 對頭部被可摺動自如地保持，同時，藉由：上端在頭 方突出所配置的接觸元件；及，上端部被配置於前 機構部之接觸臂；如此所構成，在前述接觸元件和 各個形成有安裝部，使在兩安裝部間所形成的繫合 繫合孔形成繫合機構而使該繫合機構嵌合，同時， 3&Q. 312/發明說明書(補件)/92-10/92119797 而使接 數個互 定凹凸 大而阻 所之辨 構的問 成細小 打釘機 擊活塞 口之頭 上述頭 而可作 氣至前 合的傳 射出口 觸機構 部之前 述啟發 接觸臂 突起和 在離開 7 200405843 前述繫合機構之部份藉螺絲一體結合兩個安裝部。 又，使前述繫合突起和繫合孔的形狀，形成為和接觸元 件的摺動作動方向呈正交之直線狀的上下支持邊及和接觸 元件的摺動作方向呈平行之直線狀的側方支持邊如此而呈 大致為方形狀，同時，使繫合突起之上下支持邊和側方支 持邊對應於繫合孔的上下支持邊和側方支持邊而予以嵌 合，如此為其特徵。 【實施方式】 以下依照圖式所示之實施例說明本發明之實施形態。圖 1〜圖3表示本發明之打釘機。在一體形成把手部1 1的打 釘機本體所形成之中空狀的外殼1 0内，配置有可摺動自如 地收容打擊活塞1 2之打擊氣缸1 3，在該打擊活塞1 2的下 面一體結合可打擊釘子之傳動器1 4。在前述外殼1 0的下 面安裝形成有釘子射出口 1 5之頭部1 6，前述傳動器1 4在 頭部1 6的釘子射出口 1 5内可摺動地被導引。在上述頭部 1 6之釘子射出口 1 5的側面所形成之開口一體連設有釘子 供給導引部1 7，在該釘子供給導引部1 7之後端連接收容 有多數個連結釘子之釘匣1 8，藉配置在釘子供給導引部1 7 之釘子供給機構1 9將釘匣1 8内的釘子對上述頭部1 6的釘 子射出口 1 5内依次地供給。 在前述打擊氣缸1 3的上端配置有主閥2 0，該主閥2 0選 擇性使打擊氣缸1 3内和形成在把手部1 1的内部之空氣室 2 1和排氣口間接續。空氣室2 1為介由安裝在把手部1 1後 端之空氣塞2 2接續至壓縮空氣供給源，主閥2 0藉使打擊 8 312/發明說明書(補件)/92-10/92119797 200405843 氣缸1 3内接續至空氣室2 1，而空氣室2 1内的壓縮空氣被 導入打擊氣缸1 3内而驅動打擊活塞1 2。在把手部1 1之基 部配置有為了控制前述主闊2 0之啟發閥2 3，該啟發閥2 3 藉形成在把手部1 1的下部的啟發機構2 4而作動。 啟發機構2 4為藉手動操作形成在把手部1 1下部之啟發 桿2 5 ;及，先端使配置在上述頭部1 6的釘子射出口 1 5之 先端部的接觸機構2 6押壓被釘入材料面；如此之2種操作 而作動前述啟發閥 2 3。接觸機構2 6為由突出配置在上述 頭部1 6的釘子射出口 1 5前方之接觸元件2 7 ;及，一端被 連結在該接觸元件2 7而另一端被配置在前述啟發機構2 4 之接觸臂2 8 ;如此所構成，接觸元件2 7可摺動地被支持 於形成頭部1 6的釘子射出口 1 5之筒狀部的外周面上，先 端部對上述頭部1 6的釘子射出口 1 5之先端方向突出而配 置，在釘入釘子時可壓在被釘入材料的表面上。連結在接 觸元件2 7之接觸臂2 8的上端為被配置在啟發機構2 4上， 接觸元件 2 7藉被釘入材料而被操作並使啟發機構 2 4作 動，啟發桿2 5則可使啟發閥2 3操作。 接觸元件2 7被形成為金屬成型零件，該接觸元件2 7的 上端部被組裝在折彎金屬板材料所形成之接觸臂 2 8的下 端部一體結合之頭部1 6上。如圖4所示，自接觸元件2 7 的側部朝上方一體突起形成安裝部2 9，在接觸臂2 8之下 端部形成有和前述接觸元件2 7形成的安裝部2 9前方正面 相對向而折彎形成之安裝部3 0。在上述接觸元件2 7和接 觸臂2 8的兩安裝部2 9、3 0之互相對向面形成有自接觸元 9 3&2- 312/發明說明書(補件)/92-10/92119797 200405843 件2 7的安裝部2 9突出在接觸臂2 8上的安裝部3 0側 成之繫合突起31，及，收容前述繫合突起31而形成 觸臂2 8的安裝部3 0之繫合孔3 2，如此所構成的繫合 3 3。又，在接觸元件 2 7的安裝部 2 9和前述繫合突： 隔著間隔形成有陰螺絲孔3 4，在接觸臂2 8的安裝部 應著陰螺絲孔3 4形成有開口 3 5。 如圖4及圖5所示，將形成在接觸元件2 7的安裝 上之繫合突起31嵌合於形成在接觸臂28的安裝部30 合孔3 2内，自接觸臂2 8側貫通固定螺絲3 6的軸部之 3 5藉螺合於接觸元件2 7的安裝部2 9之陰螺絲孔3 4， 元件2 7和接觸臂2 8 —體結合而裝配在頭部1 6上。藉 將接觸元件2 7的繫合突起3 1和藉接觸臂2 8的繫合 所構成之繫合機構3 3互相嵌合，由於在和該繫合機 離開的部份藉固定螺絲3 6而一體使兩者結合，因此， 被嵌合的繫合突起3 1和繫合孔3 2，其可支持當接觸 2 7壓住被釘入材料時的上下方向之負荷，及，接觸元 和接觸臂2 8間所發生的扭曲方向之負荷。 如圖6所示，形成在接觸元件2 7之繫合突起3 1和 在接觸臂2 8之繫合孔3 2的形狀，被形成為在和接觸 2 7的摺動方向呈正交之上下緣與摺動方向呈平行的 之端緣形成直線狀的上下支持邊3 7、3 8和側方支持i| 4 0，而大致形成為方形，藉在接觸元件2 7的安裝部 繫合突起3 1上所形成的直線狀之上下支持邊3 7繫合 觸臂2 8的安裝部3 0之繫合孔3 2的直線狀之上下支 312/發明說明書(補件)/92-10/92119797 所形 在接 機構 起3 1 30對 部2 9 之繫 開口 接觸 此一 孔32 構33 由於 元件 件27 形成 元件 兩側 ：39 > 29之 於接 持邊 10 200405843 3 8，而可使在接觸元件2 7壓住被釘入材料時的負荷傳達至 接觸臂2 8上。又，藉接觸元件2 7的繫合突起3 1之直線狀 的側方支持邊3 9繫合於接觸臂2 8的繫合孔3 2之直線狀的 側方支持邊4 0，其可支持在接觸元件2 7和接觸臂2 8間所 發生之扭曲方向的負荷，而可防止接觸元件 2 7和接觸臂 2 8之扭曲變形。 又，藉將固定螺絲 3 6和陰螺絲孔之締結解除，再解除 繫合突起 31和繫合孔 3 4之嵌合，如此即可自接觸臂 28 將接觸元件2 7脫離。在用不同種類的釘子來實施釘入時， 可對應該釘子在接觸臂2 8上結合接觸元件2 7，如此而可 利用打釘機。 (產業上之利用可能性） 如上根據本發明之接觸元件結合機構，由於將形成在接 觸元件和接觸臂雙方的安裝部之繫合突起和繫合孔構成的 繫合機構使其互相嵌合，同時，在和該繫合機構離開之部 分藉固定螺絲一體將兩者結合，因此，可充分支持接觸元 件對被釘入材料押壓時受到的上下方向之負荷；及，在接 觸元件和接觸臂間所發生的扭曲方向之負荷，同時，可使 傳統的結合構造結合部形成為小形狀，並可使頭部的釘子 射出口之先端部份細小化，如此可提供對釘入位置有良好 的辨視性之打釘機。 又，由於使形成在接觸元件和接觸臂之各安裝部的繫合 機構之繫合突起和繫合孔的形狀構成為在上下及兩側形成 有直線部份之形狀，同時，可對應於接觸元件的繫合突起 11 312/發明說明書(補件)/92-10/92119797 200405843 和 接 觸 臂 的 繫 合 孔 之 各 直 線 狀 的 上 下 邊 和 兩 側 邊 而 使 其 相 嵌 合 J 因 此 可 確 實 保 持 對 在 接 觸 元 件 和 接 觸 臂 間 所 發 生 之 較 大 的 扭 曲 方 向 之 負 荷 〇 進- -步， 由於其可解除接觸， 元 件： 和 接 觸 臂 之 結 合 1 因 此 5 僅 藉 接 觸 元 件 之 交 換 即 可 提 供 可 對 應 多 種 尺 寸 之 釘 子 的 打 釘 機 0 [ 圖 式 簡 單 說 明 ] 圖 1 為 本 發 明 之 打 釘 機 的 縱 剖 侧 視 圖 〇 圖 2 為 圖 1 之 打 釘 機 的 頭 部 之 反 對 側 的 側 視 圖 〇 圖 3 為 圖 1 之 打 釘 機 的 頭 部 之 正 面 圖 〇 圖 4 為 裝 配 前 之 接 觸 元 件 及 接 觸 臂 的 斜 視 圖 〇 圖 5 為 在 結 合 狀 態 之 接 觸 元 件 和 接 觸 臂 的 一 部 份 剖 面 之 正 面 圖 〇 圖 6 為 圖 5 中 之 A -A 線 上 的 剖 面 '圖 〇 圖 7 (a )及 • (b). 表 示‘ 先. 前之； f妾觸 元 件， 结 合 構 造 圖 7( a) 為 縱 剖 面 圖 圖 7丨 (b )為 正 .面 圖 〇 圖 8 為 在 圖 7 ( b) 中 之 B -B 線 .上 .的 剖 1面 I圖 〇 (元件符號說明） 10 外 殼 11 把 手 部 12 打 擊 活 塞 13 打 擊 氣 缸 14 傳 動 器 15 釘 子 射 出 口 312/發明說明書(補件)/92_ 10/92119797 12 200405843 16 頭 部 17 釘 子 供 給 導 引 18 釘 匣 19 釘 子 供 給 機 構 20 主 閥 21 空 氣 室 22 空 氣 塞 23 啟 發 閥 24 啟 發 機 構 25 啟 發 桿 26 接 觸 機 構 27 接 觸 元 件 28 接 觸 臂 29 ^ 30 安 裝 部 3 1 繫 合 突 起 32 繫 合 孔 33 繫 合 機 構 34 陰 螺 絲 孔 35 開 〇 36 固 定 螺 絲 37 ^ 38 上 下 支 持 邊 39、 40 側 方 支 持 邊 312/發明說明書(補件)/92-10/92119797200405843 发明 Description of the invention: [Technical field to which the invention belongs] The present invention relates to a nail that is supplied to a head (η 〇se) that forms a nail ejection outlet, is driven into the ejection outlet by a drive, and is ejected from the self-ejection outlet. The contact element operated by abutting the nailed material is protruded and arranged in the direction of the tip of the aforementioned head. Such a nailing machine is more specifically a connection mechanism of the contact element of the nailing machine. [Prior art] In a nailing machine that uses a compressed air as a power source to drive a striking piston to produce nails, a hollow cylinder that forms the main body of the nailing machine is provided with a striking cylinder that can flexibly accommodate the striking piston. Compressed air is introduced into the striking cylinder by a main valve disposed at the upper end of the striking cylinder. An air chamber that stores compressed air from a compressed air supply source is formed inside the grip portion integrally formed in the aforementioned casing. The main valve is connected to the striking cylinder through the air chamber, and the compressed air in the air chamber can be introduced into the striking chamber. The piston is driven in the cylinder. In addition, a heuristic valve (f r g g e r v a 1 v e) for controlling the main valve is disposed at the base of the handle, and the heuristic valve is operated by manually operating a heuristic lever formed in the lower part of the handle. A head part having a nail ejection opening is installed below the nailer body, and a driver integrally mounted under the striking piston is foldably guided in the nail ejection outlet of the head. A nail supply guide is integrally connected to the opening formed on the side of the nail ejection outlet formed on the head, and a magazine containing a large number of interconnected nails is connected to the rear of the nail supply guide, and is supplied along the nail. The nail supply mechanism arranged in the guide unit causes the connecting nails in the magazine 5 312 / Invention Manual (Supplement) / 92-10 / 92119797 200405843 to be sequentially supplied to the nail ejection outlet of the head. The above nailing machine is a heuristic (f r g g e r) mechanism formed on the base of the handle integrally formed on the body. When the above heuristic lever is operated by holding the fingers of the handle, the heuristic mechanism is operated to start the nailing machine. On the nailing machine, a contact mechanism configured to flexibly set the nail driving direction along the head and protrude in front of the head's ejection port is formed, and the tip of the head's nail ejection port is pressed against. The material is nailed and the aforementioned contact mechanism is operated, and the nailing machine can be started by the aforementioned heuristic mechanism. The previous contact mechanism is, as shown in Figs. 7 (a) and 7 (b), a contact element 3 arranged in a forward direction of the ejection port 2 protruding from the head 1; and the lower end portion is connected to The contact arm 4 above the contact element 3 is disposed next to the heuristic mechanism; in such a configuration, the contact element 3 is formed in a substantially cylindrical shape, and it is movably mounted on the head 1 On the outer periphery of the cylindrical portion of the nail ejection opening in the lower portion, the head 1 is foldably guided in the direction of the ejection opening 2. As shown in FIG. 8, the joint portion of the contact arm 4 and the contact element 3 is coupled to each other to form the concave-convex strips 5 and 6 formed in the transverse direction of the joint surface of the two, and the fixing screw is formed from the opening 8 formed on the contact element 3 side. 7 is screwed to a female screw 9 formed on the contact arm 4 to fix the two. Although the aforementioned combined structure of the contact element 3 and the contact arm 4 is formed by coupling the concave-convex portions 5 and 6 formed in the horizontal direction to receive the operating load acting in the up-down direction acting between the contact element 3 and the contact arm 4, The point of action of the bending axis of the contact element 3 and the upper end of the contact arm 4 is set to be separated from the aforementioned axial direction. Therefore, the combination of the contact element 3 and the contact arm 4 6 312 / Invention Specification (Supplement) / 92-10 / 92119797 200405843 The twisting force will occur. Therefore, in order to prevent the joint portion of the contact element 3 and the contact arm 4 from becoming twisted due to the twisting force, the number of horizontally uneven strips 5 and 6 formed in multiple phases is formed, and the width direction of the strips 5 and 6 is set. With a large size, as a result, the joint portion will deteriorate the miniaturization of the tip portion of the head 1 and deteriorate the visibility of the place where the nail enters, thereby impairing the workability. [Summary of the Invention] In order to solve the problem of the connecting machine of the contact element and the contact arm, the present invention aims to shape the tip of the nail ejection outlet of the head and provide a good visibility of the nailed place. Nailer. In order to solve the above-mentioned problem, the nailing machine of the present invention is configured in a hollow casing forming a main body to dispose a striking cylinder capable of being folded freely, and a nail ejection portion is formed at the lower portion of the casing to form a manual driving rod. Operation and apex The heuristic mechanism that operates the nailed material on the contact mechanism of the front end portion of the ejection port of the part is introduced by the action of the heuristic mechanism into the compression and air-striking cylinder and drives the piston. An actuator on the striking piston causes the nail supplied to the nail ejection port to be driven from the nail toward the material to be nailed. Thus, in the nailing machine thus formed, the abutting head can be flexibly held, and at the same time, The contact element arranged on the head protrudes from the upper end; and the contact arm of the front mechanism part is arranged on the upper end; in this way, a mounting part is formed in the contact element and each of them, so that the space between the two mounting parts is formed. The formed coupling coupling hole forms a coupling mechanism to fit the coupling mechanism, and at the same time, 3 & Q. 312 / Invention Specification (Supplement) / 92-10 / 92119797 makes the connection A small nail-making machine hits the head of the piston mouth with the above-mentioned heads of the piston mouth and can reach the front of the transmission opening contacting the mechanism part of the above-mentioned enlightened contact arm protruding and the leaving 7 200405843 A part of the aforementioned coupling mechanism is integrated with the two mounting portions by screws. Furthermore, the shape of the engaging protrusion and the engaging hole is formed as a straight upper and lower supporting side orthogonal to the direction of the folding action of the contact element and a side of the straight line parallel to the direction of the folding action of the contact element. The supporting side is substantially square in shape, and the upper and lower supporting sides and the lateral supporting sides of the engaging protrusion are fitted to correspond to the upper and lower supporting sides and the lateral supporting sides of the engaging hole, which is a feature of this. [Embodiment] An embodiment of the present invention will be described below with reference to the embodiment shown in the drawings. 1 to 3 show a nailing machine according to the present invention. In the hollow casing 10 formed by the nailer body integrally forming the handle portion 11, a striking cylinder 1 3 which can freely accommodate the striking piston 12 is disposed, and is integrated under the striking piston 12 Combined with a nail-resistant actuator 1 4. A head 16 having a nail ejection outlet 15 formed on the lower surface of the housing 10 is mounted, and the actuator 14 is guided foldably within the nail ejection outlet 15 of the head 16. A nail supply guide 17 is integrally connected to the opening formed on the side surface of the nail ejection outlet 15 of the head 16, and a plurality of nails connecting the nails are connected and accommodated at the rear end of the nail supply guide 17. The magazines 18 and 18 supply the nails in the magazines 18 to the nail ejection outlets 15 of the head 16 in order by the nail supply mechanism 19 arranged in the nail supply guide 17. A main valve 20 is disposed at the upper end of the aforementioned striking cylinder 13, and the main valve 20 selectively selectively continues the air chamber 21 and the exhaust port inside the striking cylinder 13 and the inside of the handle portion 11. The air chamber 2 1 is connected to the compressed air supply source through an air plug 2 2 installed at the rear end of the handle portion 1, and the main valve 2 0 blows 8 312 / Invention Specification (Supplement) / 92-10 / 92119797 200405843 The inside of the air cylinder 13 is continued to the air chamber 21, and the compressed air in the air chamber 21 is introduced into the striking cylinder 13 to drive the striking piston 12. A heuristic valve 2 3 for controlling the main width 20 is disposed at a base portion of the handle portion 11, and the heuristic valve 2 3 is operated by a heuristic mechanism 24 formed at a lower portion of the handle portion 11. The heuristic mechanism 24 is a heuristic lever 2 5 formed at the lower portion of the handle portion 11 by manual operation; and the tip is a contact mechanism 26 that presses the nail at the tip of the nail ejection outlet 15 disposed at the head 16. Into the material surface; the aforementioned heuristic valve 23 is actuated by these two operations. The contact mechanism 26 is a contact element 2 7 protruding in front of the nail ejection opening 15 of the head 16; and one end is connected to the contact element 27 and the other end is disposed in the heuristic mechanism 2 4. The contact arm 2 8 is configured in such a manner that the contact element 27 is foldably supported on the outer peripheral surface of the cylindrical portion of the nail ejection opening 15 forming the head portion 16 with the tip portion facing the nail of the head portion 16. The ejection opening 15 is arranged in a protruded direction, and can be pressed against the surface of the material to be nailed when the nail is nailed. The upper end of the contact arm 28 connected to the contact element 27 is arranged on the heuristic mechanism 24. The contact element 27 is operated by nailing the material and the heuristic mechanism 24 is actuated. Heuristic valve 2 3 operates. The contact element 27 is formed as a metal molded part, and the upper end portion of the contact element 27 is assembled on the head portion 16 in which the lower end portion of the contact arm 28 formed by bending the metal plate material is integrated. As shown in FIG. 4, a mounting portion 29 is integrally protruded upward from a side portion of the contact element 27, and a lower end of the contact arm 28 is formed with a front surface facing the mounting portion 29 formed by the contact element 27. And the mounting portion 30 formed by bending. A self-contact element 9 3 & 2-312 / Invention Specification (Supplement) / 92-10 / 92119797 200405843 is formed on the facing surfaces of the two mounting portions 29, 30 of the contact element 27 and the contact arm 28. The coupling portion 31 of the mounting portion 29 of the piece 2 7 protrudes from the mounting portion 30 side of the contact arm 28, and the coupling portion 31 of the mounting portion 30, which receives the aforementioned coupling protrusion 31 and forms the contact arm 28. Holes 3 2, so constituted 3 3. In addition, the mounting portion 29 of the contact element 27 and the aforementioned coupling protrusion are formed with female screw holes 3 4 at intervals, and the mounting portion of the contact arm 28 is formed with an opening 35 corresponding to the female screw holes 3 4. As shown in FIGS. 4 and 5, the engaging protrusion 31 formed on the mounting of the contact element 27 is fitted into the mounting hole 30 formed in the mounting portion 30 of the contact arm 28, and is fixed through from the contact arm 28 side. The shaft 3 of the screw 3 6 is screwed to the female screw hole 3 4 of the mounting portion 2 9 of the contact element 2 7, and the element 2 7 and the contact arm 2 8 are integrally assembled to the head 16. The engagement protrusion 3 1 of the contact element 2 7 and the engagement mechanism 3 3 formed by the engagement of the contact arm 2 8 are fitted into each other. Since the part separated from the engagement machine is fixed by the fixing screw 3 6, The two are integrated as a whole, so that the engaged engaging protrusions 31 and the engaging holes 32 can support the load in the up-down direction when the contact 2 7 presses the nailed material, and the contact element and contact The load in the twisting direction that occurs between the arms 28. As shown in FIG. 6, the shapes of the coupling protrusions 31 formed in the contact elements 27 and the coupling holes 32 formed in the contact arms 28 are formed so as to be orthogonal to the folding direction of the contacts 27. The edge which is parallel to the bending direction forms a straight upper and lower support side 3 7, 3 8 and a side support i | 4 0, and is formed into a substantially square shape, and the protrusion is engaged with the mounting portion of the contact element 27 3 Straight upper and lower support sides formed by 1 1 3 7 contacting arms 2 8 mounting portions 3 8 coupling holes 3 2 linear upper and lower branches 312 / Instruction Manual (Supplement) / 92-10 / 92119797 is formed in the connection mechanism 3 1 30 pairs of parts 2 9 openings contact this hole 32 structure 33 because the component 27 forms the two sides of the component: 39 > 29 on the holding edge 10 200405843 3 8, so that The load when the contact element 2 7 presses the nailed material is transmitted to the contact arm 28. In addition, the linear side supporting side 40 of the engaging protrusion 3 1 of the contact element 27 is connected to the linear side supporting side 40 of the engaging hole 32 of the contact arm 28, which can support The load in the twisting direction occurring between the contact element 27 and the contact arm 28 can prevent the twist deformation of the contact element 27 and the contact arm 28. In addition, by releasing the connection between the fixing screw 36 and the female screw hole, and then releasing the fitting of the engaging protrusion 31 and the engaging hole 34, the contact element 27 can be released from the contact arm 28. When different types of nails are used for nailing, the nails can be combined with the contact elements 27 on the contact arms 28, so that a nailing machine can be used. (Industrial Applicability) As described above, according to the contact element coupling mechanism of the present invention, the coupling mechanism formed by the coupling protrusion and the coupling hole formed on the mounting portion of the contact element and the contact arm is fitted to each other. At the same time, the two parts are combined by fixing screws at the part separated from the coupling mechanism, so it can fully support the load in the up-down direction when the contact element presses the nailed material; and, the contact element and the contact arm The load in the twisting direction that occurs between the two can also make the traditional joint structure into a small shape, and can make the tip part of the nail exit of the head smaller, so that it can provide a good position for the nail. Discriminating nailing machine. In addition, the shape of the engaging protrusions and engaging holes of the engaging mechanism formed on the mounting portions of the contact element and the contact arm is configured such that straight portions are formed on the upper, lower, and both sides, and can correspond to contact. The coupling protrusions of the element 11 312 / Invention specification (Supplement) / 92-10 / 92119797 200405843 and the linear upper and lower sides and both sides of the coupling hole of the coupling hole of the contact arm are fitted to each other J, so it can be reliably held For the large torsional load that occurs between the contact element and the contact arm, step-by-step, because it can release the contact, the element: the combination with the contact arm 1 so 5 can be provided only by the exchange of the contact element Nailer 0 corresponding to various sizes of nails [Simplified description of the drawing] Fig. 1 is a longitudinal sectional side view of the nailer of the present invention. Fig. 2 is a side view of the opposite side of the head of the nailer of Fig. 1. Figure 3 is the nailing of Figure 1. The front view of the head of the machine. Figure 4 is a perspective view of the contact element and the contact arm before assembly. Figure 5 is a front view of a part of the contact element and the contact arm in a combined state. Figure 6 is shown in Figure 5. The section on the A-A line 'Figure 〇 Figure 7 (a) and • (b). It means' first. Before; f contact element, combined structure Figure 7 (a) is a longitudinal sectional view Figure 7 丨 (b) It is a front view. Fig. 8 is a cross-sectional view of the line B-B in Fig. 7 (b). Fig. 1 (component symbol description) 10 Housing 11 Handle portion 12 Stroke piston 13 Stroke cylinder 14 Transmission 15 Nail shooting outlet 312 / Invention manual (Supplement) / 92_ 10/92119797 12 200405843 16 Head 17 Nail supply guide 18 Nail box 19 Nail supply mechanism 20 Main valve 21 Air chamber 22 Air plug 23 Inspiration valve 24 Inspiration mechanism 25 Inspiration lever 26 Contact mechanism 27 Contact element 28 Contact arm 29 ^ 30 Mounting portion 3 1 Fitting protrusion 32 Fitting hole 33 Fitting mechanism 34 Female screw hole 35 open Screw 37 ^ 38 up and down support side 39, 40 side support side 312 / Invention Manual (Supplement) / 92-10 / 92119797