100年G1月18日修正替換頁 九、發明說明： 【發明所屬之技術領域】 本發明係有關一種手動釘鎗，尤其是指一種省力型手 動釘鎗。 【先前技術】 請參照我國專利公告編號第576290號「打釘搶之改戸 結構」，係為一種習知之打釘搶10，此種打釘搶1〇之作^ 機構30具有-擊釘片3卜二彈性件32與—按壓柄33 1 作動機構30之按壓柄33藉由-抽桿34而轴固於該殼體 如，且該作動機構30係以該軸桿34為支點，該按壓柄犯 =定長度以該轴桿34至該·長尾端332之距離即為施 =長度’而姉桿34至該簧片勾35之距離即為抗力臂， :打:搶H)擊釘時，柄33越往下壓，因需施力於 訂針，因此需要施以軔女七旦 種費力之打钉搶10。 _丁釘搶10確實為— 冀藉發省力型手_，希 加長，_-省二 【發明内容】 本發明『省力型手 於，習知打釘鎗之你& >τ錄』所欲解決之技術問題係在 長度固定，擊釘時，+機構其走點係固定，而使得施力臂 而克服向針穿透欲固定物之力量，使 1345518 16日修正補充 得需施以較大力量，才可使釘針擊出， 工作效率變差。因此本發明人乃 創造出一種可確實省力之手動釘鎗。 1〇〇年02月16日修正替換頁 不僅較費力，且使 種問題，致力研發 使擊設計有—可移動之支點， 越來越長’抗力臂齡_，而令摔作 者按壓該按壓件時可越來越省力。錢作者可 力 方式操作該釘鎗，同時可大幅提昇工作效率。 _ 【實施方式】 有關本發明所採用之技術、手段及其功效，兹舉二較 佳實施例並配合圖式詳述如後，此僅供說明之用，在專矛: 申請上並不受此種結構之限制。100-year-old G1 18th revision replacement page IX. Description of the invention: [Technical Field of the Invention] The present invention relates to a manual nail gun, and more particularly to a labor-saving manual nail gun. [Prior Art] Please refer to China Patent Bulletin No. 576290, "Repairing Structure of Nail and Grab", which is a kind of conventional nailing and grabbing 10, which is used for nailing and grabbing 1 The pressing member 33 of the actuating mechanism 30 is axially fixed to the housing by the pull rod 34, and the actuating mechanism 30 is pivoted by the shaft 34. The handle is a fixed length, the distance from the shaft 34 to the long tail end 332 is the length = the length of the mast 34 to the reed hook 35 is the resistance arm, : hit: grab H) when hitting the nail The more the handle 33 is pressed down, the force is required to apply the needle, so it is necessary to apply the scorpion seven-day kind of hard work to grab the nail. _丁钉抢10 is indeed - 冀 Borrowing labor-saving hand _, 希加长, _-省二 [Summary of the invention] The present invention "saving effort type, the custom nail gun you &> τ recorded" The technical problem to be solved is that when the length is fixed, when the nail is nailed, the mechanism is fixed, and the force arm is used to overcome the force of penetrating the needle to the fixed object, so that the 1345518 16-day correction needs to be added. With great strength, the nail can be shot out and the work efficiency is deteriorated. Therefore, the inventors have created a manual nail gun that can be practically labor-saving. On February 16th, 1st, the revision of the replacement page was not only laborious, but also caused a problem. The research and development of the design made the impact design have a movable fulcrum, and the length of the 'resistance arm age _, and the author of the drop pressed the pressing member. It can be more and more labor-saving. The money author can manipulate the nail gun in a powerful way, while greatly improving work efficiency. _ [Embodiment] Regarding the technology, means and effects of the present invention, the second preferred embodiment is described in detail with reference to the drawings, and this is for illustrative purposes only, and is not applicable to the application: The limitations of this structure.
參照圖-與圖二’為本發明省力型手動釘餘之立體外 觀圖與立體分解圖。本發明之省力型手動釘鎗係包含有— 本體10與一省力裝置20。該本體10包括兩側殼體u與 一前殼體12，其中前殼體12包覆著兩側殼體u。兩側殼 體11身部形成一握持部111供操作者手部握持。握持部 111下方裝設有一釘匣13,握持部in上方設有一彈片 14 ’彈片14包括第一端141與第二端142，彈片14第二 端142被限制於側殼體11，彈片14第一端141可選擇抵 於一緩衝塊15’同時兩側殼體11壁面分別形成一容孔 112 ’恰可容置緩衝塊15。兩側殼體11上端分別形成—導 槽U3 ’導槽113與側殼體11頂壁面之間固設有一抵頂件 16，抵頂件16鄰近導槽113形成一抵頂部161，其中抵頂 6 1345518 胍1· I8修正 1n 年月曰補充 1〇0年01月18曰修正; 部161成數齒狀’且齒的排列方式呈直線狀。Referring to the drawings - and Fig. 2', a perspective view and an exploded perspective view of the labor-saving manual nail are shown. The labor-saving manual nail gun of the present invention comprises a body 10 and a labor-saving device 20. The body 10 includes two side casings u and a front casing 12, wherein the front casing 12 encloses the side casings u. The body portions of the side casings 11 form a grip portion 111 for the operator to hold. A magazine 13 is disposed under the grip portion 111, and a resilient piece 14 is disposed above the grip portion in the first portion 141 and the second end 142. The second end 142 of the elastic piece 14 is restricted to the side housing 11, the elastic piece The first end 141 of the casing 14 can be selected to be abutting against the buffer block 15'. At the same time, the wall surfaces of the two side casings 11 respectively form a hole 112' to accommodate the buffer block 15. The upper end of the two sides of the housing 11 is formed with a guide groove U3. The abutment member 16 is fixed between the guide groove 113 and the top wall surface of the side housing 11. The abutting member 16 forms an abutting portion 161 adjacent to the guiding groove 113. 6 1345518 胍1· I8 Correction 1n Year Month 曰 Supplement 1〇0年01月18曰 Correction; Part 161 is in a number of teeth' and the teeth are arranged in a straight line.
前殼體12近似U字型，形成兩側壁121與一底壁122, 兩側壁121適處分別設有一執道123 ’同時轨道123對應 於侧殼體11之導槽113。底壁122經由沖壓成形時，在底 壁122内部形成一容室124(圖中未見’請參照圖三），值 得一提的是側殼體11的執道123也是以沖壓直接成形。前 殼體12的底壁122與兩側殼體11之間容設有一擊釘片 17，擊釘片17設有一第一連接孔171與一第二連接孔 172，第一連接孔171套置於省力裝置20而被省力裝置2〇 所帶動，第二連接孔172套置於彈片14第一端141帶動彈 片14。The front housing 12 is approximately U-shaped, forming two side walls 121 and a bottom wall 122. The two side walls 121 are respectively provided with an obstruction 123 ′ while the rail 123 corresponds to the guide groove 113 of the side housing 11. When the bottom wall 122 is formed by press forming, a chamber 124 is formed inside the bottom wall 122 (not shown in the drawings) (see Fig. 3). It is worth mentioning that the obstruction 123 of the side casing 11 is also directly formed by stamping. A nailing piece 17 is disposed between the bottom wall 122 of the front housing 12 and the two side housings 11. The nailing piece 17 is provided with a first connecting hole 171 and a second connecting hole 172. The first connecting hole 171 is sleeved. The labor-saving device 20 is driven by the labor-saving device 2, and the second connecting hole 172 is sleeved on the first end 141 of the elastic piece 14 to drive the elastic piece 14.
省力裝置20包括一按壓件21、一活動件22、二樞接 塊23與一彈性件24。兩側殼體11包覆著按壓件21，按壓 件21裝設於彈片14與抵頂件16之間，按壓件21設有兩 側壁211與一按壓部212,兩側壁211之間形成一空間 213，側壁211設有第一枢孔214與第二樞孔215，同時侧 壁211的上緣對應第一樞孔214處設有一擎動部216，上 緣對應於第二樞孔215處設有一擋部217。其中擎動部216 成數齒狀，且齒的排列方式呈弧狀。 按壓件21的空間213提供活動件22容置’活動件22 身部形成-活動槽221 ’活動件22 _端突設有一連動部 222,連動部222穿伸於擊釘片17之第一連接孔π，鄰 近連動部222設有-凸部223,凸部223凸伸於彈性件24, 並將彈性件24限制於活動件22與抵頂件16之間。活動件 7The labor-saving device 20 includes a pressing member 21, a movable member 22, two pivoting blocks 23 and an elastic member 24. The two sides of the housing 11 are covered by the pressing member 21, and the pressing member 21 is disposed between the elastic piece 14 and the abutting member 16. The pressing member 21 is provided with two side walls 211 and a pressing portion 212, and a space is formed between the two side walls 211. 213, the side wall 211 is provided with a first pivot hole 214 and a second pivot hole 215, and the upper edge of the side wall 211 is provided with a urging portion 216 corresponding to the first pivot hole 214, and the upper edge corresponds to the second pivot hole 215. There is a stop 217. The moving portion 216 has a plurality of teeth shape, and the teeth are arranged in an arc shape. The space 213 of the pressing member 21 provides the movable member 22 to accommodate the 'moving member 22 body forming-moving groove 221'. The movable member 22 has an interlocking portion 222, and the linking portion 222 extends through the first connection of the nailing piece 17. The hole π is adjacent to the interlocking portion 222 and is provided with a convex portion 223 that protrudes from the elastic member 24 and restricts the elastic member 24 between the movable member 22 and the abutting member 16. Activity piece 7
100年01月18日修正替換頁 22活動槽221内設有一連接件224與一限制部225分別穿 伸於兩樞孔214、215。 樞接塊23之一面形成一擋壁231，且樞接塊23設有 牙孔232。極接塊23可橫向移動的容置於側殼體I〗之 導槽113，同時利用擋壁231將樞接塊23限制於導槽113 不落入兩側殼體11之間，而前殼體12之軌道123限制柩 接塊23不脫出。活動件22的連接件224兩端分別穿伸於 兩樞接塊23之穿孔232，活動件22的限制部225兩端穿 伸於按壓件21後抵觸於兩側殼體η之壁面。前殼體 套置兩側殼體11時，執道123對應於導槽113，同時軌道 123限制枢接塊23擔壁231移動的範圍。 兩側殼體11包覆省力裝置20,同時前殼體12套置兩 側殼體11，利用數固定件18將兩側殼體u結合不脫離， 以及數固定件18將前殼體12與兩側殼體u結合不脫離。 參照圖三與圖四，為本發明省力型手動釘餘之剖面示 意圖’表省力裝置20於第—位置之示意圖。本發明之釘餘 未作動時，省力裝置20 ϋ彈性件24之雜釋放壓抵於活 動件22之凸部223 ’連動按壓件21之按壓部212向上輕 起。 & 活動件22並因為連接件224與限制部2扛呈一高一低^ 而使活動件22往擊釘片17的方向下移。此時，樞^塊^ 位於導槽113之第-端1131而鄰近按壓部212，實施呈弧 狀之¥動部216與呈直線之抵頂部161嗜合，活動件^ 之連動部222連動擊釘片Π，同時彈片14第-端141穿 ^4^518 10». *· --/¾ jut. 年月曰1充 100年G】月18日修正替換頁 伸於4钉片17，利用容室124的空間容納 ⑷以及活動件22之連動部 端 部216改變唾合位置時，同時以連接^ 擎動 改變相對於導槽113的位置，連接件224與限制部^ 23 ^是固定的’限制部挪可隨著觀件21的移動^的 則叙體11之間以連接件224為圓心呈弧線移 兩 22被限制蝴件21的兩側壁211之間二： =用連接件224與限制部挪限制活動件22的^方同^ 由圖中可見按璧件21施力與連動擊釘片17抗力夕，動並方向。 =動槽221中移動的連接件224為支點，連接2、可 按壓部212為施力臂u，連 4至 臂L2。 王#釕片17為抗力 茶知圖五至圖七，為本發明省力 壓按壓件21，讓掣動邱21fi崎人於4 0之動作圖。按 麼物下墨改=頂部161 ’並隨著按 制部225㈣合快速樞轉，並連動4 動槽221位置。此時該連接件224(支點）將在活 曰 、連移動，利用隨著按壓部212 連接件224與限制箱快速改變位置二 内之活動件22之遠㈣α 制於空間213 壓縮彈性件24 升’活動件22之凸部223 釘片17並將彈/連動部恐連動擊釘片17向上提，擊 接件224在、、舌14第—端141往上提’活動件22受到連 並往導=點位置，枢接塊23 知1132移動，讓限制部225抵頂於活動 9 1充 100年01月18日修正替換頁 槽221的束端，士卜拉 — ---— 】7第一連接孔171 連動部222麟擊釘件 再度回到古點 _舞性件24彈性回復使按壓部212 彈片]4的 向下衝擊的力量，順利完成擊訂動作。UT片17產生 〗6:= = 212ΤΦ’改變_21與抵頂件 移動’並二活IS塊23在侧殼體11之導槽⑴内 力擊釘片&其中連接件224所在位置為省 支===接件224移動而改變支點位置， 較，W之相對關係。由圖三與圖六相 參照圖八，為本發明省力型手動釘餘按壓件？！另一實 可：:2。其中按壓件21與活動件22的結合方式還 兩限制部218進—步限制於活動件^之活動槽 二中兩限制部218由按壓件21的兩側壁2ΐι向空間 二動件22容置於空間213時，限制物同 件m 件22之活動槽221，使活動件22利用連接 件224與限制部218而限制於空間213内移動 的其他構件與前述相同，在此不多作贅述。 貝匕 =明之省力型手動釘餘係利用按壓件的擎動部嗜合 二”认頂部’ 件時’以寧動部嗜合 10 亂 1. 18修 J3： 年月曰ϋ 補无 ___ 100年01月18日修正替換頁 ——— ± 。、忏的又點疋—可移動之支點，當 =時’施力臂越來越長，抗力臂越來越短，而令摔作者 文堡按壓件時可越來越省力。使操作者可讀省 同時可大幅提昇4效率。啊省力震㈣ 活動件以導槽關位移，導槽的設計可承受較大的 亚可以更為準確的改變位置。 、何， 就以上所述可以歸納出本發明具有以下之 1. 本發明『省力财騎#』，其中本發㈣有 動的支點，當欲擊㈣，施力臂縣 越可和 來越省力的擊釘。 抗力編丑’可越 2. 本發明『省力型手動釘鎗』，其 二：用改變唾合位置讓活動件快速移動，達到快速連： 3.本發明力型手動⑽』，其中 的方式操作祕而可大幅提昇工作效率。_^力 活二=:『省力型手動釘鎗』，其中本發明省力裝置的 活動件以導槽限制位移，導槽的設 直的 並可以更轉麵改變位置。 ^大的負荷 ，1 f ^入艾，iiL 且 〇 相二…有 合專:規定之積極及消極要件，理=符 唯所述者，僅為本發明之較佳實施例而已， =之限定树料就㈣，故軌數值 =此 件之置換，或依本刺申料姆_作之轉 1345518Correction Replacement Page 22, January 18, 100. A movable member 221 is provided with a connecting member 224 and a restricting portion 225 extending through the two pivot holes 214 and 215, respectively. One of the pivoting blocks 23 forms a retaining wall 231, and the pivoting block 23 is provided with an aperture 232. The pole block 23 is laterally movable and accommodated in the guide groove 113 of the side casing I, while the retaining wall 231 restricts the pivot block 23 to the guide groove 113 without falling between the side shells 11, and the front shell The track 123 of the body 12 limits the splicing block 23 from coming out. The two ends of the connecting member 224 of the movable member 22 respectively extend through the through holes 232 of the two pivoting blocks 23. The two ends of the restricting portion 225 of the movable member 22 extend through the pressing member 21 and abut against the wall surface of the two side casings η. When the front casings are placed on the side casings 11, the roadway 123 corresponds to the guide grooves 113, and the rails 123 restrict the range in which the pivoting blocks 23 are moved by the wall 231. The two sides of the housing 11 are covered with the labor-saving device 20, and the front housing 12 is sleeved with the two side housings 11, and the two side housings u are combined without being separated by a plurality of fixing members 18, and the plurality of fixing members 18 and the front housing 12 are The two sides of the housing u do not detach. Referring to FIG. 3 and FIG. 4, a schematic diagram of the labor-saving manual nail rest section of the present invention is shown in the first position of the labor-saving device 20. When the nail of the present invention is not actuated, the misalignment releasing force of the labor-saving device 20 ϋ elastic member 24 is pressed against the convex portion 223' of the movable member 22 to interlock the pressing portion 212 of the pressing member 21 upward. & the movable member 22 moves the movable member 22 downward in the direction of the nail piece 17 because the connecting member 224 and the restricting portion 2 are at a high level and a low level. At this time, the pivoting block is located at the first end 1131 of the guiding groove 113 and adjacent to the pressing portion 212, and the arc-shaped engaging portion 216 is in contact with the straight line 161, and the interlocking portion 222 of the movable member is linked. The nail piece is Π, and the first end 141 of the elastic piece 14 is worn ^4^518 10». *· --/3⁄4 jut. Year 曰1 charging 100 years G] The 18th day correction replacement page is extended to 4 nail pieces 17, using When the space accommodation (4) of the chamber 124 and the interlocking end portion 216 of the movable member 22 change the salivation position, and the position relative to the guide groove 113 is changed by the connection, the connecting member 224 and the restricting portion are fixed. The restriction portion can be moved in the arc with the connecting member 224 as the center of the movement of the viewing member 21, and the two side walls 211 of the butterfly member 21 are constrained by two: ??? The restricting portion moves the restricting movement of the movable member 22 from the figure. It can be seen that the pressing force of the pressing member 21 and the interlocking of the nailing piece 17 are resistant to each other. The connecting member 224 moving in the movable groove 221 is a fulcrum, and the connecting portion 2, the pressing portion 212 is a biasing arm u, and the connecting arm 4 is connected to the arm L2. Wang #钌片17 is the resistance. The tea is shown in Figure 5 to Figure 7. It is the labor-saving pressure pressing member 21 of the present invention, which allows the action of Qiu 21fi Saki people in 40. Press the ink to change the top = 161 ' and quickly pivot with the pressing part 225 (four), and interlock the position of the 4 groove 221. At this time, the connecting member 224 (the fulcrum) will move in the movable and continuous use, and the movable member 22 in the position 2 is rapidly changed with the connecting portion 224 of the pressing portion 212 and the restricting box. (4) α is formed in the space 213 to compress the elastic member 24 liters. 'The convex portion 223 of the movable member 22 is the nail piece 17 and the bullet/linking portion is connected with the nail piece 17 upwardly, and the hitting member 224 is lifted at the first end 141 of the tongue 14 and the movable member 22 is connected. Guide point position, the pivot block 23 knows that 1132 moves, and the restriction portion 225 is pressed against the activity 9 1 to charge the end of the replacement page slot 221 on January 18, 100, Shibula — --- — 】 7 A connecting hole 171 interlocking portion 222 strikes the nail member and returns to the ancient point again. The elastic return of the dancing member 24 causes the downward impact of the pressing portion 212 of the elastic piece 4 to smoothly complete the binding action. The UT sheet 17 produces 〖6:==212ΤΦ'change_21 and the top member move' and the active IS block 23 is in the guide groove (1) of the side casing 11 to force the nail piece & wherein the position of the connecting member 224 is the provincial branch === The connector 224 moves to change the fulcrum position, and the relative relationship of W. 3 and FIG. 6 Referring to FIG. 8 , is the labor-saving manual nail residual pressing member of the present invention? ! Another real:: 2. The manner in which the pressing member 21 and the movable member 22 are combined is further restricted by the restricting portion 218 to the movable slot 2 of the movable member. The two restricting portions 218 are received by the two side walls 2ΐ of the pressing member 21 to the space second moving member 22. In the space 213, the restricting member is the same as the movable groove 221 of the member m, and the other members that move the movable member 22 to the space 213 by the connecting member 224 and the restricting portion 218 are the same as those described above, and will not be further described herein. Bessie = Ming's labor-saving manual nail rest system uses the pressing part of the engine to match the second part of the "recognition of the top part" when the Ningdong Department is accustomed to 10 chaos 1. 18 repair J3: year month 曰ϋ no ___ 100 On January 18th, the revised replacement page --- ±., 忏 又 疋 - movable fulcrum, when = 'the force arm is getting longer and longer, the resistance arm is getting shorter and shorter, and the author is the Wenbao When pressing the part, it can be more and more labor-saving. It can save the operator and save the 4 efficiency. ah Labor-saving vibration (4) The movable part is displaced by the guide groove, and the design of the guide groove can withstand a larger sub-Asia can be more accurately changed. Position, and, as described above, it can be summarized that the present invention has the following 1. The present invention "provincial wealth riding #", in which the present (4) has a moving fulcrum, when the desire to hit (four), the force of the county can be more The more labor-saving nails. The resistance to the ugly 'can be 2. The invention is a labor-saving manual nail gun. The second is to change the position of the saliva to make the moving parts move quickly to achieve a quick connection: 3. The force type manual of the present invention (10) 』, the way to operate secretly can greatly improve work efficiency. _^力活二=: 『 effort-type The movable nail gun, wherein the movable member of the labor-saving device of the present invention is displaced by the guide groove, the guide groove is set straight and can be changed to change the position. ^ Large load, 1 f ^ into the AI, iiL and 〇 phase two... There are specialties: the positive and negative requirements of the regulations, the only ones of the invention are only the preferred embodiments of the present invention, and the qualified tree is (4), so the track value = the replacement of this piece, or according to this Stinging the material _ _ zhizhi 1345518
100年01月18日修正替換頁 飾，皆應仍屬本發明專利涵蓋之範轉。 【圖式之簡要說明】 圖一：為本發明省力型手動釘鎗之立體外觀圖。 圖二：為本發明省力型手動釘鎗之立體分解圖。 圖三：為本發明由圖一之3-3剖面線所取之剖面圖，表省 力裝置於第一位置之示意圖。 圖四：為本發明由圖一之4-4剖面線所取之剖面圖，表柩 接塊於導槽第一端之示意圖。 圖五：為本發明省力裝置之動作圖。 圖六：為本發明省力裝置於第二位置之示意圖。 圖七：為本發明樞接塊於導槽第二端之示意圖。 圖八：為本發明省力型手動釘鎗按壓件之另一實施例示意 圖。 附件：我國專利公告編號第576290號專利案。 【主要元件符號說明】 10 本體 11 側殼體 111 握持部 112 容孔 113 導槽 1131 第一端 1132 第二端 12 前殼體 121 側壁 122 底壁 123 執道 124 容室 13 釘匣 14 彈片 141 第一端 142 第二端 15 緩衝塊 16 抵頂件 161 抵頂部 12 1345518 m ι· is倏正 癱· 4月曰補充 100年01月18日修正替換頁 17 擊釘片 171 第一連接孔 172 第二連接孔 18 固定件 20 省力裝置 21 按壓件 211 側壁 212 按壓部 213 空間 214 第一極孔 215 第二樞孔 216 掣動部 217 擋部 218 限制部 22 活動件 221 活動槽 222 連動部 223 凸部 224 連接件 225 限制部 23 框接塊 231 擋壁 232 穿孔 24 彈性件 13On January 18, 100, the revised replacement page should still be covered by the patent of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a labor-saving manual nail gun of the present invention. Figure 2 is a perspective exploded view of the labor-saving manual nail gun of the present invention. Figure 3 is a cross-sectional view taken along line 3-3 of Figure 1 of the present invention, showing a schematic diagram of the labor saving device in a first position. Figure 4 is a cross-sectional view taken along line 4-4 of Figure 1 of the present invention, showing the block at the first end of the channel. Figure 5: Action diagram of the labor saving device of the present invention. Figure 6 is a schematic view of the labor saving device of the present invention in a second position. Figure 7 is a schematic view of the pivoting block of the present invention at the second end of the guide groove. Figure 8 is a schematic view showing another embodiment of the labor-saving manual nail gun pressing member of the present invention. Attachment: Patent No. 576290 of China Patent No. 576290. [Main component symbol description] 10 body 11 side case 111 grip portion 112 hole 113 guide groove 1131 first end 1132 second end 12 front case 121 side wall 122 bottom wall 123 way 124 chamber 13 nail 匣 14 shrapnel 141 First end 142 Second end 15 Buffer block 16 Abutting piece 161 Abutting top 12 1345518 m ι· is倏正瘫· April 曰 Supplement 100 years January 18th Revision replacement page 17 Nailer 171 First connection hole 172 second connecting hole 18 fixing member 20 labor saving device 21 pressing member 211 side wall 212 pressing portion 213 space 214 first pole hole 215 second pivot hole 216 tilting portion 217 blocking portion 218 restricting portion 22 movable member 221 movable groove 222 linking portion 223 convex portion 224 connecting member 225 restricting portion 23 frame connecting block 231 retaining wall 232 perforation 24 elastic member 13