200307590 玖、發明說明 【發明所屬之技術領域】 本發明爲在具備有依貫穿裝釘紙之釘書針腳部而在下方 向移動之可動式的緊鉗之釘書機，其可抑止緊鉗傾斜且可 防止釘書針的腳部彎曲。 【先前技術】 使貫穿有複數張的裝釘紙之π字狀的釘書針腳部’在裝 釘紙的下面側沿著裝釘紙的背面折彎之釘書機中’使頂接 釘書針腳部並折彎腳部用之緊鉗在上下方向可動地被支 持，在釘書針的腳部貫穿裝釘紙後藉使釘書針的腳部繋合 緊鉗而折彎。如圖6所示，緊鉗1爲被收容在形成於裝釘 紙載置構件2的開口被配置爲對裝釘紙載置構件在上下方 向可移動，以介裝在緊鉗1的下面和臂蓋3的底面間之彈 簧4朝上方被激勵。 裝釘紙載置構件2爲，由於沿著緊鉗臂5在前後方向可 滑動之滑件6被夾在形成於臂蓋3的支持片7和裝釘紙載 置構件2之間，因此，在裝釘操作開始時對臂蓋3被保持 於上方位置，緊鉗1的上端面之釘書針誘導溝8被配置於 形成在裝釘紙載置構件2之開口 9上端緣的所希望位置。 對配置在裝釘紙載置構件2上面之裝釘紙打入釘書針， 釘書針的腳部前端會貫穿裝釘紙而貫穿至裝釘紙的背面側 時，釘書針的前端會頂接緊鉗1的上端面使緊鉗1對裝釘 紙載置構件2往下方移動。使被支持在裝釘紙載置構件2 上的裝釘紙貫穿釘書針後，滑件6會朝後方側作動並使裝 6 312/發明說明書(補 \件)/92-07/92109578 200307590 釘紙載置構件2可朝下側搖動自由，且釘書針會 移動，並依緊鉗1 一口氣折彎釘書針的腳部。 如圖7(a)所示，習知之緊鉗1爲配置在臂鉗3 內側收容於可在上下方向搖動的裝釘紙載置構件 之開口 9內，不會使緊鉗1的下端部之寬度方向 大。因此，如圖7(b)所示，緊鉗在到達臂蓋的底 釘書針的偏心負荷而會在緊鉗發生力矩，緊鉗 斜，因此，緊鉗的釘書針誘導溝也會變成傾斜， 件會往後方移動和裝釘紙載置構件共同在釘書針 方向時彎曲釘書針的腳部。 【發明內容】 本發明爲在具備有可動式的緊鉗之釘書機中， 提供一種以釘書針的腳部緊鉗往下方被移動時可 大傾斜之情形，且可消除釘書針的腳部彎曲之現 爲了解決上述課題本發明之釘書機，其係使收 的釘書針之針匣、具備有朝向裝釘紙打出收容在 的釘書針之驅動器的手柄部、及沿著裝釘紙的背 述針匣打出並貫穿裝釘紙之釘書針腳部前端部彎 部之緊鉗臂，在各自的後端部中可轉動自如地支 特徵爲：前述緊鉗部形成有覆蓋前述緊鉗臂的底 之臂蓋，在該臂蓋的兩側壁間配置有搖動自如的 置構件，使配置於前述臂蓋和裝釘紙載置構件間 成爲上部的寬度狹小且使下部突出在兩側方向， 緊鉗之寬度狹小的上部收容於貫穿形成在前述裝 312/發明說明書(補 \件)/92-07/92109578 往更下方 的側壁之 2所形成 的尺寸變 面時，依 會變成傾 結果，滑 下降至下 其課題爲 防止緊鉗 象。 容有多數 該針匣內 面使自前 曲的緊鉗 持者，其 面及側面 裝釘紙載 之緊鉗形 同時使該 釘紙載置 200307590 構件上之開口內，使緊鉗之下部的突出部側緣部收容於形 成在前述臂蓋的兩側壁內面之導引溝，構成在引導下降緊 鉗時至少根據前述裝釘紙載置構件之開口和臂蓋的導引溝 之一面而引導。 又，上述緊鉗之上部的寬度和突出在兩側方向之下部的 寬度，也可形成爲相對於依加在緊鉗上部之釘書針的偏心 負荷所產生的旋轉力矩不會使緊鉗傾斜之寬度比率。 【實施方式】 以下，依照圖式顯示之實施例說明本發明之實施形態。 圖1爲本發明的釘書機之實施例，收容有多數的釘書針之 針匣1 〇、具備有被裝塡在前述針匣1 0內朝向裝釘紙打出 釘書針之驅動器11的手柄部1 2、及在前端部具備有沿著 裝釘紙的背面使自前述針匣1 〇被打出並貫穿裝釘紙之釘 書針腳部前端部彎曲的緊鉗部1 3之緊鉗臂1 4，係在各自 的後端部中依支持軸1 5而可轉動自如地被支持。 在針匣1 0的前端部形成有朝向配置在針匣1 0的下面之 裝訂用紙打出所收容的排頭之釘書針的打出口 1 6，進一 步，在針匣1 〇內配置有使收容在針匣1 〇內的釘書針朝向 前述打出口 1 6按壓激勵之推動器1 7。推動器1 7爲沿著配 置在針匣10內的導引桿18可滑動自如地被支持，藉由配 置在推動器1 7的後面側之推動彈簧1 9朝針匣1 0的前方激 勵。 藉按壓操作配置在手柄部1 2上面側的操作手柄20再介 驅動器1 1自打出口 1 6打出針匣1 0內的釘書針，釘書針的 8 312/發明說明書(補 \件)/92-07/92109578 200307590 腳部會貫穿配置在針匣1 〇和緊鉗部13間之裝釘紙，貫 過裝釘紙的釘書針之腳部會以前述緊鉗部1 3沿著裝釘 的背面被折彎而裝釘上裝釘紙。 沿著裝釘紙的背面折彎貫穿裝釘紙的釘書針腳部之 鉗部13爲，具備有覆蓋著前述緊鉗臂14的下面側安裝 緊鉗臂14在臂蓋21的前端部份可在上下方向移動所配 之緊鉗22，在該緊鉗22的上端面，形成有繫合著釘書 的腳部並沿著裝釘紙的背面誘導腳部互相朝向內側而折 之緊鉗溝23。在前述臂蓋2 1的上方配置有後端部對緊 臂1 4搖動自如地被支持之裝釘紙載置構件24，在該裝 紙載置構件24的前部所形成之開口 25內收容有前述緊 22。再來，可依夾在緊鉗22下面和臂蓋21的底面間之 簧26使緊鉗22朝上方激勵。 依夾在裝釘紙載置耩件24和緊鉗臂14間之彈簧27 裝釘紙載置構件朝上方激勵，進一步，在裝釘紙載置構 24和緊鉗臂1 4之間沿著緊鉗臂1 4在前後方向夾著有可 動之滑件2 8，釘書機在開始裝訂操作時，依彈簧2 9而 配置在前方的滑件2 8之支持部3 0進入裝釘紙載置構件 的下面以阻止裝釘紙載置構件24往下方向搖動。在該 態，裝釘紙載置構件24對臂蓋2 1被保持在上方位置， 鉗22的上端面之緊鉗溝23被配置於形成在裝釘紙載置 件24的開口 2 5之上端緣的所希望之位置。 如圖2所示，緊鉗22的下部爲往前述裝釘紙載置構 24的兩側突出般地突出在兩側方向被形成寬度寬大，該 312/發明說明書(補 \件)/92-07/92109578 穿 紙 緊 於 置 針 彎 鉗 釘 鉗 彈 使 件 滑 使 24 狀 緊 構 件 兩 9 200307590 側的突出部22a被收容在形成於臂蓋21之兩側壁31的內 壁面之導引溝32(導引部），以該導引溝32引導緊鉗22對 上下方向可移動。又，也可依裝釘紙載置構件24的開口 25來引導緊鉗22的上部。 藉圖4及圖5說明緊鉗22下部的突出部22a之尺寸設 定。傾斜之緊鉗22座落在臂蓋2 1的底面而矯正釘書針S 的傾斜之作用爲，關係於形成在緊鉗22上面的緊鉗溝23 之高度，及傾斜在緊鉗溝2 3之釘書針S的腳部自接地（落 地）位置至下部的突出部22a之側端（亦即，緊鉗22的側緣 部）爲止之尺寸d的尺寸比率。根據實驗求得的結果，如圖 5的圖表所示，以突出部的尺寸d=0.32·緊鉗的高度h之 關係爲境界，突出部22a的突出尺寸d比它小時判明會發 生許多彎曲的頻率。因此，藉將突出部22的突出尺寸d 設定爲緊鉗的高度h之0.32倍可防止發生彎曲。又，突出 部尺寸d的上限値雖然沒有特別限定，但也可以作成在操 縱釘書機的臂蓋2 1不會有障礙之大小。 以下，依照圖3(a)〜3(d)說明上述實施例之運轉狀態。如 圖3 (a)所示，在配置於裝釘紙載置構件24上面之裝釘紙p 打入釘書針S時，貫穿裝釘紙P的釘書針S腳部會頂接緊 鉗22的上面，使緊鉗22抗拒彈簧26的激勵力量而移動至 下方向。又，在上述操作裝釘的初期中，由於在裝釘紙載 置構件24和緊鉗臂14間配置有滑件28，因此裝釘紙載置 構件2 4會被支持在上方位置。 如圖3(b)所示，在釘書針S的腳部貫穿裝釘紙P而釘書 10 312/發明說明書(補 \件)/92-07/92109578 200307590 針s發生傾斜時，雖然釘書針s的一邊之腳部會繫合緊鉗 22將緊鉗22的片側往下側按壓爲如傾斜般地在下方向運 轉，但由於緊鉗22的下部會在形成於臂蓋2 1的兩側壁3 1 之導引溝32內被引導，因此，緊紺22的傾斜不會變大地 在下方向移動。由於緊鉗22係以不會依釘書針s的偏心 負荷所產生的旋轉力矩而旋轉的方式形成幅度較寬的突出 部22a，因此，緊鉗22不會傾斜而變成和臂蓋21的底面 水平。 如圖3 (〇所示，在釘書針S的腳部貫穿裝釘紙p後，滑 件28會往後方側作動並自裝釘紙載置構件24和緊鉗臂14 間退避，由此，裝釘紙載置構件24可往下方搖動。 如圖3 (d)所7^，在受到圖3 (c)的偏心負荷之狀態即使釘 書針S和裝釘紙P往更下方被按壓時，緊鉗22不會傾斜 而貫穿在裝釘紙P下面之釘書針S腳部不會彎曲，而可依 緊鉗溝2 3互相朝向內側誘導並沿著裝釘紙P的下面折彎 即可裝釘上裝釘紙P。 又，本發明並不限定於上述之實施形態，在本發明之技 術範圍內尙可作各種改變，當然本發明包含上述之改變。 又本申請案爲根據2002年4月24日申請之曰本專利（特 願2002- 1 2 3 042)所成之發明，在此參照該些內容而納入本 申請案中。 (產業上之可利用性） 根據以上之本發明，由於在臂蓋使可在上下方向移動所 保持的緊鉗下部突出於兩側方向以形成突出部，將該緊鉗 11 312/發明說明書(補 \件)/92-07/92109578 200307590 的上部收容於形成在裝釘紙載置構件之開口內，使下部的 突出部收容於形成在臂蓋之兩側壁的導引溝內而導引，因 此，可將緊鉗的下部之寬度方向的尺寸設定爲比裝釘紙載 置構件的寬度尺寸更大，不會使緊鉗傾斜，由於使緊鉗的 下面頂接著臂蓋之底面，因此，可有效地防止釘書針彎曲。 又，即使緊鉗對裝釘紙載置構件在下方向移動時，亦可 依裝釘紙載置構件和臂蓋使緊鉗的上部和下部在緊鉗的移 動範圍之全區域內引導，可防止緊鉗大傾斜且可有效地防 止彎曲之發生。 【圖式簡單說明】 圖1顯示本發明之實施例的釘書機之縱剖側視圖。 圖2爲圖1的釘書機之緊鉗部的分解斜視圖。 圖3(a)〜（d)爲顯示以圖1的釘書機之運轉狀態，圖3(a) 爲在裝釘驅動之初期階段釘書針.貫穿裝釘紙之後的狀態.， 圖3(b)爲以貫穿裝釘紙的釘書針腳部緊鉗被移動至下方向 之狀態，圖3(c)爲裝釘紙載置構件變成可搖動裝釘紙和釘 書針使緊鉗往更下方向移動之狀態，圖3(d)顯示釘書針腳 部沿著裝釘紙的背面被折彎之狀態。 圖4顯示以緊鉗之矯正狀態的說明圖。 圖5顯示緊鉗溝的高度和傾斜在緊鉗溝的釘書針腳部自 所設置之位置至下部的突出部之側端爲止的尺寸之尺寸比 率關係的圖表。 圖6顯示習知之釘書機的緊鉗部之縱剖面圖。 圖7(a)及（b)顯示以圖6的緊鉗臂之運轉狀態，圖7(a) 12 312/發明說明書(補 Vf牛)/92-07/92109578 200307590 爲在裝訂驅動之初期狀態，圖7(b)顯示以貫穿裝釘紙的釘 書針腳部緊鉗在下方向被移動之狀態。 (元件符號說明） 1 > 22 緊鉗 2、 24 裝釘紙載置構件 3、 2 1 臂蓋 4、 26 、 27 、 29 彈簧 5、 14 緊鉗臂 6、 28 滑件 7、 3 0 支持片 8 釘書針誘導溝 9、 25 開口 10 針匣 11 驅動器 12 手柄部 13 緊鉗部 15 支持軸 16 打出口 17 推動器 18 導引桿 19 推動彈簧 20 操作手柄 22a 突出部 23 緊鉗溝 312/發明說明書(補 \件)/92-07/92109578 13 200307590 3 1 兩側壁 32 導引溝 P 裝釘紙 S 釘書針 d 高度 h 尺寸 14 312/發明說明書(補 Vf牛)/92-07/92109578200307590 发明 Description of the invention [Technical field to which the invention belongs] The present invention is a stapler equipped with a movable clamp capable of moving in a downward direction according to a staple pin portion penetrating the staple paper, which can prevent the clamp from tilting and Prevents staples from bending. [Prior Art] A staple machine having a π-shaped staple pin penetrating through a plurality of sheets of staple paper 'is stapled on the lower side of the staple paper along the back side of the staple paper' A clamp for bending the legs is supported movably in the up-down direction. After the staples of the staples are inserted through the paper, the staples of the staples are engaged with the clamps to bend. As shown in FIG. 6, the clincher 1 is housed in an opening formed in the stapling paper placement member 2 and is configured to be movable in the up-down direction with respect to the stapling paper placement member so as to be interposed between the underside of the clincher 1 and The spring 4 between the bottom surfaces of the arm covers 3 is excited upward. The stapling paper placing member 2 is such that a slider 6 slidable forward and backward along the clamp arm 5 is sandwiched between the support piece 7 formed on the arm cover 3 and the stapling paper placing member 2. At the start of the stapling operation, the arm cover 3 is held at the upper position, and the staple-inducing groove 8 on the upper end face of the clamp 1 is arranged at a desired position formed on the upper end edge of the opening 9 of the stapling paper placing member 2. . When a staple is inserted into the staple paper placed on the staple paper placing member 2, when the tip of the staple's foot passes through the staple and passes to the back side of the staple, the tip of the staple will The upper end surface of the clamp 1 is pressed against the clamp paper 1 and the clamp 1 is moved downward. After the staple paper supported on the staple paper placing member 2 passes through the staples, the slider 6 moves to the rear side and the attachment 6 312 / Invention Manual (Supplements) / 92-07 / 92109578 200307590 The staple mounting member 2 can swing freely toward the lower side, and the staples can move, and the legs of the staples can be bent in one fell swoop according to the clamp 1. As shown in FIG. 7 (a), the conventional clamp 1 is arranged inside the arm clamp 3 and accommodated in the opening 9 of the staple paper mounting member that can be pivoted in the vertical direction. The width direction is large. Therefore, as shown in FIG. 7 (b), when the clamp reaches the eccentric load of the staple at the bottom of the arm cover, a torque occurs in the clamp and the clamp is inclined. Therefore, the staple-induced groove of the clamp also becomes When it is tilted, the piece moves backward and the staple paper placing member bends the foot of the staple together in the direction of the staple. [Summary of the Invention] The present invention provides a stapler with a movable clamp, which provides a situation in which the clamp can be tilted greatly when the clamp is moved downward, and the staple can be eliminated. In order to solve the above-mentioned problem, the stapler of the present invention is a stapler for retracting staples, a handle portion provided with a driver for ejecting and storing the staples toward the stapling paper, and The back clip of the staple paper is punched out and penetrates the clincher arm of the bent portion of the front end of the staple pin portion of the staple paper. The clincher arm is rotatably supported in the respective rear end portion. The bottom arm cover of the forceps arm is provided with a swinging member between the two side walls of the arm cover, so that the width between the arm cover and the stapling paper placing member becomes an upper part and the lower part projects on both sides. Orientation, the upper part of the narrow width of the clamp is accommodated in the dimension change surface formed through the side wall 2 formed in the aforementioned device 312 / Invention Manual (Supplements) / 92-07 / 92109578, which is lower. As a result, slipped down to its next lesson To prevent the clincher like. Contains most of the clamp holders that make the inner surface of the needle box self-curved, and its sides and sides are equipped with a nail-clamped shape to hold the nail-paper in the opening on the 200307590 component, so that the lower part of the clamp protrudes. The side edge portions are received in the guide grooves formed on the inner surfaces of the two side walls of the arm cover, and are configured to guide at least according to the opening of the nail-paper mounting member and the guide groove of the arm cover when guiding the lowering forceps. . In addition, the width of the upper part of the clamp and the width of the lower part protruding in both directions may be formed so that the clamp does not tilt due to the rotational moment generated by the eccentric load of the staple attached to the upper part of the clamp. Width ratio. [Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to examples shown in the drawings. FIG. 1 is an embodiment of a stapler according to the present invention. A staple cartridge 10 containing a large number of staples is provided with a driver 11 installed in the aforementioned staple cartridge 10 to drive staples toward the staple paper. The handle portion 12 and a clincher arm 1 provided at the front end portion with a clincher portion 1 3 that is bent along the back surface of the staple paper and punched out from the needle magazine 10 and penetrates the tip portion of the staple pin portion of the staple paper. 4. It is rotatably supported by the support shaft 15 in the respective rear end portions. The front end of the needle magazine 10 is formed with a punching opening 16 for ejecting the first-line staples stored therein toward the binding paper disposed below the needle magazine 10, and further, the needle magazine 10 is provided with a storage space in which The staples in the needle magazine 10 press the energized pusher 17 toward the aforementioned ejection opening 16. The pusher 17 is slidably supported along a guide rod 18 disposed in the needle magazine 10, and is urged toward the front of the needle magazine 10 by a push spring 19 disposed on the rear side of the pusher 17. By pressing the operation handle 20 disposed on the upper side of the handle portion 12, the driver 1 is reintroduced from the self-driving exit 1 6 and the staple cartridge 10 is ejected, and the staple 8 8 312 / Instruction Manual (Supplements) / 92-07 / 92109578 200307590 The foot will pass through the stapled paper arranged between the magazine 10 and the clincher 13, and the foot of the staple passing through the stapled paper will be stapled along the aforementioned clincher 1 3 The back is bent and nailed to the nailing paper. The jaw portion 13 which is bent along the back of the staple paper and penetrates through the staple portion of the staple paper is provided with a clamping jaw arm 14 covering the lower side of the clamping jaw arm 14 at the front end portion of the arm cover 21. The associated clamp 22 is moved in the vertical direction, and a clamp groove 23 is formed on the upper end surface of the clamp 22 to bind the stapled feet and induce the feet to face each other along the back surface of the staple paper. Above the arm cover 21, a staple paper placing member 24 whose rear end portion is tightly supported by the clamping arm 14 is disposed, and is accommodated in an opening 25 formed in a front portion of the paper placing member 24. There are the aforementioned tight 22. Further, the clamp 22 can be excited upward by a spring 26 sandwiched between the lower surface of the clamp 22 and the bottom surface of the arm cover 21. The stapling paper mounting member is excited upward by the spring 27 sandwiched between the stapling paper mounting member 24 and the gripper arm 14. Further, between the stapling paper mounting structure 24 and the gripper arm 14, The clamp arm 1 4 has a movable slider 2 8 in the front-rear direction. When the stapler starts the binding operation, the support part 30 of the slider 2 8 arranged in front of the spring 2 9 enters the stapling paper. Place the lower surface of the member to prevent the staple paper placing member 24 from swinging downward. In this state, the staple paper placing member 24 is held at the upper position with respect to the arm cover 21, and the clamp groove 23 on the upper end face of the forceps 22 is arranged at the upper end of the opening 25 formed in the staple paper placing member 24 The desired position of the fate. As shown in FIG. 2, the lower part of the clincher 22 is formed to protrude toward both sides of the aforementioned stapling paper placement structure 24 and is formed in a wide width in both directions. The 312 / Invention Specification (Supplements) / 92- 07/92109578 The paper-tightening mechanism is used to slide the needle-clamping pliers to make the two 24-shaped tightening members 9 200307590. The protruding portion 22a on the side is accommodated in the guide groove 32 formed on the inner wall surface of the two side walls 31 of the arm cover 21. A guide portion), and the clamp 22 is guided by the guide groove 32 to be movable in the vertical direction. Furthermore, the upper portion of the clincher 22 may be guided by the opening 25 of the staple paper placing member 24. The size setting of the protruding portion 22a at the lower portion of the clincher 22 will be described with reference to Figs. 4 and 5. The inclined clincher 22 is seated on the bottom surface of the arm cover 21 to correct the inclination of the staple S. The effect is related to the height of the clincher groove 23 formed on the clincher 22 and the clincher groove 2 3 The size ratio of the foot of the staple S from the ground (landing) position to the side end of the lower protruding portion 22 a (ie, the side edge portion of the clincher 22). According to the results obtained through experiments, as shown in the graph of FIG. 5, taking the relationship between the size of the protruding portion d = 0.32 and the height h of the clamping jaw as the boundary, the protruding size d of the protruding portion 22a is smaller than it is judged that many bends will occur. frequency. Therefore, by setting the protruding dimension d of the protruding portion 22 to 0.32 times the height h of the clincher, bending can be prevented. In addition, although the upper limit 尺寸 of the size d of the protruding portion is not particularly limited, it may be made to have a size that does not cause any obstacle in the arm cover 21 of the stapler. Hereinafter, the operation state of the above embodiment will be described with reference to Figs. 3 (a) to 3 (d). As shown in FIG. 3 (a), when the staple paper p arranged on the staple paper placing member 24 is driven into the staple S, the staple S penetrating through the staple paper P will abut against the pliers. The upper surface of 22 moves the clamp 22 to the downward direction against the exciting force of the spring 26. In the initial stage of the above-mentioned operation of stapling, since the slider 28 is disposed between the stapling paper mounting member 24 and the clamp arm 14, the stapling paper mounting member 24 is supported at the upper position. As shown in FIG. 3 (b), when the staple S is inserted through the foot of the staple S and the staple 10 312 / Invention Specification (Supplements) / 92-07 / 92109578 200307590 is tilted, The leg of one side of the staple s will be engaged with the clamping forceps 22 and the sheet side of the clamping forceps 22 will be pressed downward to operate in a downward direction as if inclined, but the lower part of the clamping forceps 22 will be formed on the two sides of the arm cover 2 1 The inside of the guide groove 32 of the side wall 31 is guided, so that the inclination of the clamp 22 does not move in the downward direction to a large extent. Since the clamp 22 is formed so as not to rotate in accordance with the rotation torque generated by the eccentric load of the staple s, the protrusion 22 a having a wide width is formed. Therefore, the clamp 22 does not tilt and becomes the bottom surface of the arm cover 21. Level. As shown in FIG. 3 (0), after the foot of the staple S penetrates the stapling paper p, the slider 28 moves to the rear side and retracts between the stapling paper placing member 24 and the gripper arm 14. As shown in Fig. 3 (d), the stapling paper placing member 24 can be shaken downward. Even when the staple S and the stapling paper P are pressed further down in the state of being subjected to the eccentric load of Fig. 3 (c). At this time, the clincher 22 does not tilt and the staple S penetrating under the staple paper P does not bend, but can be induced toward each other according to the clincher groove 23 and bent along the bottom of the staple paper P. The nail paper P can be attached. Moreover, the present invention is not limited to the above-mentioned embodiment, and various changes can be made within the technical scope of the present invention. Of course, the present invention includes the above-mentioned changes. The present application is based on 2002. The invention created by the Japanese patent (Japanese Patent Application No. 2002-1232-3042) filed on April 24, 2014 is incorporated herein with reference to these contents. (Industrial Applicability) According to the above According to the invention, since the lower part of the gripper held by the arm cover which can be moved in the up-down direction is protruded from both sides to form a protruding portion, the gripper is formed. 11 312 / Invention Specification (Supplements) / 92-07 / 92109578 200307590 The upper part is accommodated in the opening formed in the stapling paper mounting member, so that the lower protrusions are accommodated in the guides formed on both side walls of the arm cover It is guided in the groove. Therefore, the width of the lower part of the clamp can be set to be larger than the width of the stapling paper mounting member, and the clamp is not inclined. The bottom surface of the cover can effectively prevent the staples from bending. Also, even when the clamp moves to the staple paper mounting member in the downward direction, the upper part of the clamp and the clamp can be moved by the staple paper mounting member and the arm cover. The lower part is guided in the entire area of the moving range of the clamp, which can prevent the clamp from tilting greatly and effectively prevent bending. [Brief Description of the Drawings] FIG. 1 shows a longitudinal section side of a stapler according to an embodiment of the present invention. View. Fig. 2 is an exploded perspective view of the clasping portion of the stapler of Fig. 1. Figs. 3 (a) to (d) show the operation state of the stapler of Fig. 1, and Fig. 3 (a) is the installation The staples in the initial stage of staple driving. The state after penetrating the paper. Figure 3 (b) The staple clamp of the stapled paper is moved to the downward direction, and FIG. 3 (c) shows a state where the staple paper placing member can be moved to the lower direction by shaking the staple paper and the staple. Fig. 3 (d) shows the state where the staple pins are bent along the back of the stapled paper. Fig. 4 shows the corrective state of the clincher. Fig. 5 shows the height and inclination of the clincher groove. The graph of the size ratio relationship of the size of the staple pin portion from the set position to the side end of the lower protruding portion. Fig. 6 shows a longitudinal sectional view of a clamp portion of a conventional stapler. Fig. 7 (a) And (b) shows the operating state of the clamp arm shown in FIG. 6, and FIG. 7 (a) 12 312 / Invention Manual (Supplement Vf Cow) / 92-07 / 92109578 200307590 is the initial state of the binding drive, and FIG. ) Shows the state in which the staple pins penetrating through the staple paper are moved in the downward direction. (Description of component symbols) 1 > 22 Tweezers 2, 24 Staple paper mounting members 3, 2 1 Arm covers 4, 26, 27, 29 Spring 5, 14 Tightening arms 6, 28 Sliders 7, 3 0 Support Sheet 8 Staple induction groove 9, 25 Opening 10 Needle box 11 Driver 12 Handle part 13 Clamping part 15 Support shaft 16 Exit 17 Pusher 18 Guide rod 19 Pushing spring 20 Operating handle 22a Protrusion 23 Tightening groove 312 / Invention specification (Supplements) / 92-07 / 92109578 13 200307590 3 1 Two side walls 32 Guide groove P Staple paper S Staples d Height h Size 14 312 / Invention specification (Supplement Vf cow) / 92-07 / 92109578