1306915 九、發明說明： 【發明所屬之技術領域】 為穩:::是 【先前技術】1306915 IX. Description of invention: [Technical field to which the invention belongs] To be stable::: Yes [Prior Art]
按’梯架的使用已成為人們不可或缺的工具 如梯子或魔架等登高器具’都是提供人們可以輕易且 快速地取得設於高處物品的有效工具。 一般之梯架，如第1圖所示，該梯架8〇〇，係由 兩個梯柱相接組成，梯柱下端設有腳墊以防止打滑， 其間則設有相隔適當距離之踏板，使用時呈A ^ ’ 以供使用。 該傳統式梯架，由於其整體體積相當大，攜 當不便，收放亦需占用偌大空間，缺乏使用彈性。 、有鑑於此，本發明人乃針對該些缺點研究改進之 道，終於有本發明的產生。 【發明内容】 因此，本發明即旨在提供一種伸縮梯，其 式^柱單元、連接套件、鎖固機構及橫向梯板紐成 以、到方便收合攜帶、收藏或拉伸使用者。 依本發明之此種伸縮梯，在鎖固機構有更進步的 改良，提供伸縮梯於拉伸使用時，不虞因為外力^施 5 1306915 壓而導致梯子鬆脫造成危險，以破定使用之安全，為 本發明之次一目的。 ’ 依本發明之此種伸縮梯，其連接套件與中空梯管 為卡固後再黏著固可不虞鬆脫者，此為本發明： 另一目的。 依本發明之此種伸縮梯，其連接套件内所設之 固機構因受到橫向梯板包覆而能避免鏽姓損壞， 本發明之另一目的。 … 至於本發明之詳細構造、應用原理、作用 效，則參照下列依附圖所作之說明即可得到完全/的 解。 】 【實施方式】 本發明之此種伸縮梯，如第 1是可以收合，或如第3圖所…：其伸鈿梯 數梯柱單元2、連接開狀者，其包括多 用時為二曰連接套件3及橫向梯板5,其展開使 為不二同幵之梯架，收合時則藉各節梯柱單元互 馮不同官徑之設置相互疊置。 清參照第4、5、6圖所示，各梯 套合，即内邻奎-知门 合铞柱早兀2係相互 2:該梯柱單元2為中空管 二内:柱= 定位孔22,下段則設有 上W卡孔21及 適當高度處並設有一二1於穿固孔23上端 ^ 2 ^ ^ ^ ^ ^ 向外凸出的擋環25,且梯柱單 几2表面距離該凸出 不往早 出松％ 25適當高度處則有一向管 6 1306915 内凸出的内凸環溝26(請參照第3A圖）； ^其連接套件3，具有環套部3 1及軸接部32，該 .環套部31為水平地套設在梯柱單元上端並藉螺絲3"3 .徑向穿過以鎖緊至梯柱單元，其内部設有數個定位棒 頭34，係提供其套至梯柱單元時藉定位榫頭34嵌入 梯柱單兀之卡孔21而快速組合，以及，其内壁凹設 有黏液流道35，黏液流道35 一端設注膠孔％以^ φ 注入黏著劑使之與梯柱單元2緊密黏著；以及，其設 有貝穿孔30與軸接部32内部通道37相通者； 所述之軸接部32，係與環套部3〖一體成型，而 包含有兩片相互平行的直立邊板321、322，兩直立 邊板32卜322之、間湘隔適當距離以形成通道37，以 便容設鎖固機構4 ;兩直立邊板321、322之内壁面 相對位置處各設有一垂直槽38及二凹槽391、392， 其中，所述之垂直槽38係設於接近邊板末端的位 • 置，第一凹槽391設於邊板的上端面板緣處，而第二 ' 凹槽392則設於邊板的下端面板緣處； 該鎖固機構4，包括第一層鎖固機構4a和上層 鎖固機構4b(第二層以上之鎖固機構統稱為上層鎖固 機構4b);如第5圖所示者為上層鎖固機構仆，該上 層鎖固機構4b，包括—鎖閘41、一鎖桿42、一彈簧 43、一撥鍵44及一連動鍵45 ;該鎖閘41，其設有一 直立固定板410，以供插入上述轴接部32之直立邊 7 1306915 板321、322的垂直槽38内，固定板41〇的中央設有 一水平套管413，水平套管413的開口端朝向貫穿孔 30 ； • 所述之鎖桿42，為一水平放置之圓柱狀桿體， 其一端可穿過貫穿孔30及梯柱單元之定位孔22，而 另一端則可套入水平套管413内’其與水平套管‘I] 之間並設有一彈簧43 ,使其水平移動時可藉彈簀43 的力量回復原來位置；該鎖桿42的桿體上並設有間 胃隔之搬槽421、422 ; 所述之撥鍵44，其具有第一面板441和第二面 板442’第一面板441和第二面板442略呈V形連接， 該第一面板441上端設有間隔之叉臂443，叉臂443 可叉入鎖桿42之嵌槽422，第一面板441和第二面 板442相接處並設有向兩側凸出之卡榫444，使其可 藉卡榫444嵌入前述環套部31之直立邊板321、322 鲁 的凹槽392 ;由此，當撥鍵44之第二面板442被由 下在上推動時’即得以卡棒444為軸心，帶動鎖桿 42前後水平移動； 所述之連動鍵45，其具有一撥板451，撥板451 的下端設有向兩側凸出之卡棒452，使其可藉卡榫 452嵌入前述環套部31之直立邊板321、322的凹槽 391 ’撥板451下端並設有約與撥板451呈九十度之 間隔叉腳453，該叉腳453係可叉入鎖桿42之嵌槽 8 1306915 二前後水平移動時，即帶動連動 上層鎖固機構外裝入軸接 狀， 將橫向梯板5套入二32内組裝定位後’ 端面板相對至撥鍵44 ;“二向梯板5下 孔51， 之弟—面板442的位置設有通 、上為面板相對至連動鍵 通孔52，wι u 〜m直則有弟一 以供連動鍵45之撥板451可以向上伸出。 復如第4圖所示，係第一層鎖固機構钝之詳細 ::圖’该第一層鎖固機構牝’具有與上層鎖固機 構扑相同之彈簧43、撥鍵44及連動鍵45,有關該 、’。構不再重複#明，以下兹針對不同處配合圖說 明： 如圖所示，第一層鎖固機構4a之鎖桿42，除了 設有嵌槽421、422，在供彈簧43套設的一端復設有 一狹槽423供一 e形夾424設置，其另一端則為夾持 部425 ;在上層鎖固機構4b設置鎖閘的位置，改為 設置中央具通孔461之直立固定板46，固定板46得 飯入上述軸接部32之直立邊板321、322的垂直槽 38内固定； 另設有一手動控制鈕47與連桿48，該手動控制 鈕47上端具有一導板471，導板471下端設有水平 槽溝472，使其可用迫緊的方式將導板471推入橫向 梯板5之移位孔53内，使手動控制鈕47可藉水平槽 1306915 溝472嵌入移位孔53的側邊而能於移位孔53上前後 自由滑動； 該手動控制鈕47中央並具有一槽道473，以供 與連桿48的一端經由插梢連接；所述之連桿48，主 要為橫向設置，其前端係可穿過固定板46之通孔 461 ’再與鎖桿之夾持部425經由插梢連接，連桿48 的另一端呈傾斜狀，俾可穿過橫向梯板5之移位孔 53，並伸入手動控制鈕47之槽道473，而與手動控 制鈕47連接組裝成一體。 工 / _此外，中空梯管下端復設有一緩衝元件6，該緩 衝几件6略呈錐形套筒狀，其上端藉外側卡勾61勾 固於梯柱單元2之扣孔24 ’其下段外圍設有彈性封 圈62’當中空梯管被往上拉時，彈性封圈以不作用， 梯子可輕鬆拉伸，當中空梯管往下降時，彈性封圈 =順著錐度往外迫緊，使梯子產生緩降效果，該緩 =件6又可於内部設置膠膜’使膠膜表面有孔，俾 二厂兀件6上下移動時，空氣可經孔進入 1 ’以促料衝絲。 :裝完成後’如圖所示’梯柱單元2因底端有緩 單元内：及彈性封圈62的設置，能增加與外部梯柱 官k接觸緩衝磨擦，達到緩衝昇降之目的； 端及連接套件3因有黏液流道35供灌、、主 U劑使緊密黏結固定，故整整體組裝後極為安全穩 1306915 板其完全為連接套件3 導致損壞之功能。制與避免外物渗入 内部：：Γ柱單元2a與梯柱單元2相對拉伸，至 至外邻描知：2a以其外部略具較大外徑之擋環25頂 所干早元2之内凸環溝26而定位(如第从圖 :::同時？柱單元2a下端之穿固孔則正位於外 及鎖;P :之疋位孔22、其連接套件之貫穿孔30、 =的通路上，使鎖桿42向前移動時可順利插 使用時請參明筮7、S SJ α _ 構4a之手動控制紐47 -層鎖固機 連桿料㈣桿42退4#^ 2動，透過 疋出梯柱單兀2之定位孔22， 干移動時，則分別帶動撥鍵44作順時針轉 動’以及使連動鍵45作逆時針轉動， = 45之，自橫向梯板5之第二通孔52向吏上連伸動出鍵 即穿^第一 ^的連動鍵45,其撥板451向上伸出後， 二橫向梯板h之通孔…，而推動設於第 :广向梯板5a内之撥鍵44a的第二面板4仏，使 、建”針轉動，當撥鍵4牦作順時針轉動 出第P 使°又於第一層橫向梯板53内之鎖桿42a退 ::梯柱單元2&之定位孔咖，達到開鎖狀態，第 柱早兀2a即可向上拉伸；至第二梯柱單元h之 1306915 穿固孔23a與第一梯柱單元 桿42a即可再因彈簧 之貫穿孔30相對，鎖 2am二 作用，插入第二梯柱單元 :之穿固孔23a，達到第二梯柱單元2a 外，在鎖桿42a退出第二梯杠菩—λ 此 ，μ认# 梯柱早兀2a之定位孔22aPressing the use of ladders has become an indispensable tool for people such as climbing appliances such as ladders or magic frames. It is an effective tool for people to easily and quickly obtain items placed at high places. The general ladder frame, as shown in Fig. 1, is composed of two ladder columns connected to each other. The lower end of the ladder column is provided with a foot pad to prevent slipping, and a pedal separated by an appropriate distance is arranged therebetween. When used, it is A ^ ' for use. The traditional ladder frame, due to its large size, is inconvenient to carry, and requires a large space for retraction and storage, and lacks flexibility in use. In view of the above, the inventors have studied the improvement of these shortcomings, and finally have the invention. SUMMARY OF THE INVENTION Accordingly, the present invention is directed to an extension ladder having a column unit, a connection kit, a locking mechanism, and a lateral ladder to facilitate carrying, storing, or stretching a user. According to the telescopic ladder of the present invention, there is a more advanced improvement in the locking mechanism, and when the extensional ladder is used for stretching, it is not necessary to cause the ladder to be loose due to the external force and the pressure of 5 1306915, so as to break the safety of use. For the second purpose of the invention. According to the telescopic ladder of the present invention, the connection kit and the hollow ladder tube are stuck and then adhered, and the present invention is another object. According to the telescopic ladder of the present invention, the fixing mechanism provided in the connection kit can be prevented from being damaged by the rust by being covered by the lateral ladder, and another object of the present invention. As for the detailed construction, application principle, and effect of the present invention, a complete solution can be obtained by referring to the following description made with reference to the accompanying drawings. [Embodiment] The extension ladder of the present invention can be folded as shown in the first figure, or as shown in Fig. 3: the number of steps of the ladder column 2 is connected to the open type, which includes two when used in multiple cases. The 曰 connection kit 3 and the lateral ladder plate 5 are unfolded so as to be the same ladder frame, and the folding ladders are stacked on each other by the different official diameters of the ladder column units. Referring to Figures 4, 5, and 6 of the Qing Dynasty, each ladder is assembled, that is, the inner neighboring Kui-Kenmen combined column is early 2, the mutual 2: the ladder unit 2 is the hollow tube 2: column = positioning hole 22, the lower section is provided with the upper W card hole 21 and the appropriate height and is provided with a stop ring 25 which protrudes outward from the upper end of the through hole 23 ^ 2 ^ ^ ^ ^ ^, and the surface of the ladder column is 2 The inner convex ring groove 26 protruded from the inner tube 6 1306915 at a suitable height from the protrusion 25 (refer to FIG. 3A); ^the connection kit 3 has the ring portion 3 1 and the shaft The connecting portion 32 is horizontally sleeved on the upper end of the ladder column unit and is screwed through the screw 3"3 to lock to the ladder column unit, and has a plurality of positioning rod heads 34 therein. When the sleeve is provided to the ladder column unit, the positioning boring head 34 is inserted into the card hole 21 of the ladder column to be quickly combined, and the inner wall is concavely provided with the mucus flow passage 35, and the mucus flow passage 35 is provided with the injection glue hole at one end to ^ φ Injecting the adhesive to be closely adhered to the ladder column unit 2; and, the bellet hole 30 is provided to communicate with the internal passage 37 of the shaft joint portion 32; the shaft joint portion 32 is integrally formed with the loop portion 3 And comprising two parallel vertical side plates 321, 322, two vertical side plates 32 322, between the appropriate distance to form a channel 37, so as to accommodate the locking mechanism 4; two vertical side plates 321, 322 A vertical groove 38 and two grooves 391, 392 are respectively disposed at opposite positions of the inner wall surface, wherein the vertical groove 38 is disposed at a position close to the end of the side plate, and the first groove 391 is disposed at the upper end of the side plate. The second 'groove 392 is disposed at the lower end panel edge of the side panel; the locking mechanism 4 includes the first layer locking mechanism 4a and the upper layer locking mechanism 4b (the second layer or more is locked) The mechanism is collectively referred to as an upper locking mechanism 4b); as shown in FIG. 5, the upper locking mechanism is provided, and the upper locking mechanism 4b includes a lock brake 41, a lock lever 42, a spring 43, and a dial 44. And a linkage button 45; the lock gate 41 is provided with an upright fixing plate 410 for inserting into the vertical groove 38 of the upright side 7 1306915 of the shaft portion 32, and a central portion of the fixing plate 41 is provided with a Horizontal sleeve 413, the open end of the horizontal sleeve 413 faces the through hole 30; • the lock lever 42 is a horizontal The cylindrical rod body is placed, one end of which can pass through the through hole 30 and the positioning hole 22 of the ladder column unit, and the other end can be nested between the horizontal sleeve 413 and the horizontal sleeve 'I] and is provided with a The spring 43 can be restored to the original position by the force of the magazine 43 when it is horizontally moved; the shaft of the lock lever 42 is provided with a groove 421, 422 for the stomach partition; the dial button 44 has the The first panel 441 and the second panel 442 of the first panel 441 are slightly V-shaped. The upper end of the first panel 441 is provided with a spaced fork arm 443, and the fork arm 443 can be forked into the slot of the lock lever 42. 422, the first panel 441 and the second panel 442 meet and are provided with a latch 444 protruding to both sides, so that the card 444 can be inserted into the upright side plate 321, 322 of the loop portion 31. The slot 392; thus, when the second panel 442 of the dial button 44 is pushed from the bottom up, the lever 444 is pivoted to move the lock lever 42 horizontally forward and backward; the linkage key 45 has a The lower end of the dial 451 and the dial 451 are provided with the hooks 452 protruding toward the two sides so as to be inserted into the upright side plates 321 and 3 of the loop portion 31 by the latches 452. The groove 391 of the groove 391 'the lower end of the dial 451 is provided with a fork 453 at a distance of ninety degrees from the dial 451. The fork 453 can be forked into the slot 8 1306915 of the lock lever 42. That is, the upper interlocking mechanism is driven to be inserted into the shaft joint shape, and the lateral ladder plate 5 is placed in the second 32 to be assembled and positioned, and the end panel is opposite to the dial button 44; the two-way ladder plate 5 is the lower hole 51, the brother-panel The position of the 442 is provided with a through-and-out panel opposite to the interlocking key through-hole 52, and wι u 〜m is straightened to have a dial 451 for the interlocking key 45 to extend upward. As shown in Fig. 4, the first layer locking mechanism is blunt in detail: the figure 'the first layer locking mechanism 牝' has the same spring 43 as the upper locking mechanism, the dial 44 and the interlocking key 45 , about this, '. The structure is not repeated #明, the following is a description of the different parts: As shown in the figure, the lock bar 42 of the first layer locking mechanism 4a, in addition to the fitting grooves 421, 422, at the end of the spring 43 A slot 423 is provided for an e-clip 424, and the other end is a clamping portion 425. Where the upper locking mechanism 4b is provided with a lock, the upright fixing plate 46 of the central through hole 461 is instead disposed. The fixing plate 46 is fixed in the vertical groove 38 of the upright side plates 321 and 322 of the above-mentioned shaft connecting portion 32; a manual control button 47 and a connecting rod 48 are further provided, and the upper end of the manual control button 47 has a guiding plate 471. The lower end of the plate 471 is provided with a horizontal groove 472, so that the guide plate 471 can be pushed into the displacement hole 53 of the lateral ladder plate 5 in a tight manner, so that the manual control button 47 can be inserted into the displacement hole by the horizontal groove 1609915 groove 472. The side of the 53 is slidable back and forth on the shifting hole 53; the manual control button 47 has a channel 473 at the center for connecting with one end of the connecting rod 48 via the spigot; the connecting rod 48, mainly For the lateral direction, the front end thereof can pass through the through hole 461 ' of the fixing plate 46 and the clamping portion 42 of the lock lever 5 via the spigot connection, the other end of the connecting rod 48 is inclined, and the cymbal can pass through the displacement hole 53 of the lateral ladder plate 5 and extend into the channel 473 of the manual control button 47, and is assembled with the manual control button 47. In one. In addition, a lower cushioning member 6 is disposed at the lower end of the hollow ladder tube, and the cushioning member 6 has a slightly conical sleeve shape, and the upper end is hooked to the buckle hole 24' of the ladder column unit 2 by the outer hook hook 61. The outer periphery is provided with an elastic sealing ring 62'. When the hollow ladder tube is pulled up, the elastic sealing ring does not work, and the ladder can be easily stretched. When the hollow ladder tube is lowered, the elastic sealing ring is pressed outwards along the taper. To make the ladder produce a descending effect, the retarding member 6 can also be provided with a film inside to make the surface of the film have a hole, and when the second factory member 6 moves up and down, the air can enter the hole through the hole to promote the feeding. : After the installation is completed, as shown in the figure, the ladder column unit 2 can be increased in contact with the external ladder column by the arrangement of the elastic element ring and the elastic sealing ring 62 to achieve the purpose of buffer lifting. The connection kit 3 is filled with the mucus flow channel 35, and the main U agent is tightly bonded, so that the whole assembly is extremely safe and stable. The 1306915 plate is completely damaged by the connection kit 3. And avoiding the infiltration of foreign objects into the interior: the mast unit 2a and the ladder column unit 2 are relatively stretched, and the outer neighbors are described as: 2a is surrounded by a retaining ring 25 with a slightly larger outer diameter on the outside. The inner ring groove 26 is positioned (as shown in the figure::: at the same time, the through hole at the lower end of the column unit 2a is located outside and locked; P: the hole 22, the through hole 30 of the connection kit, = In the passage, when the lock lever 42 is moved forward, it can be smoothly inserted. Please refer to 筮7, S SJ α _ 4A manual control button 47 - layer locker link material (4) rod 42 retract 4#^ 2 movement By pulling out the positioning hole 22 of the ladder column unit 2, when the dry movement is performed, the dial button 44 is respectively driven to rotate clockwise 'and the interlocking key 45 is rotated counterclockwise, = 45, from the horizontal ladder 5 The two-way hole 52 extends the key to the upper end of the cymbal, that is, the interlocking key 45 of the first ^, the dialing plate 451 is extended upward, the through-hole of the two lateral ladder plates h, and the push is set at the first: wide direction The second panel 4 of the dial button 44a in the ladder plate 5a is rotated to make the needle rotate. When the dial button 4 is rotated clockwise, the lock lever 42a is turned into the first layer of the lateral ladder 53. Retreat:: ladder column unit 2 & The hole hole coffee reaches the unlocking state, and the first column can be stretched upwards 2a early; to the first ladder column unit h 106915, the through hole 23a and the first ladder column unit rod 42a can be opposite to the spring through hole 30 , the lock 2am acts, inserts the second ladder column unit: the through hole 23a, reaches the second ladder column unit 2a, and the second lever bar λ is exited at the lock lever 42a, the μ recognition# ladder column is early 2a Positioning hole 22a
Li: 梯板5&之連動鍵45“艮著作逆 =動’使其撥板451a向外伸出，繼續推動第三 層k向梯板内之撥鍵，如此依序Li: The linkage key 45 of the ladder 5&""reverse work=moving' causes the dial 451a to extend outwardly, and continues to push the dial of the third layer k to the ladder, so in order
機構連動打開。 序使第二層以上的鎖固 本發明’當鎖桿42回復定位鎖固狀態 =的撥板⑸並未完全退至水平狀態時，因為連 動鍵4 5的撥板4 5】讯·*+日σ , "又计疋使其呈水平狀態時為鎖固 狀態’因此’即使被誤踩或被外力施壓，也不會使鎖 固機構打開，反而會將鎖桿更推入梯柱單元，使鎖固 狀態更為確實，故本發明使用時具有極佳之安全功 厶b aThe organization is linked to open. In order to lock the second layer or more of the present invention, when the lock lever 42 is returned to the position and lock state = the dial (5) is not completely retracted to the horizontal state, because the dial 4 of the linkage button 4 5] ** The day σ, " also counts to make it in a horizontal state when it is locked. Therefore, even if it is accidentally stepped on or pressed by an external force, the locking mechanism will not be opened, but the lock bar will be pushed into the ladder column. The unit makes the locking state more reliable, so the invention has excellent safety function when used.
由此可知，本發明之此種伸縮梯，藉由在連接套 件3與梯柱單元2之間，設置了可提供快速組合至定 位之卡孔21、疋位榫頭34及擋環23，加上黏液流道 35的^又置，使整體緊密固定更加確實，而鎖固機構4 設於連接套件3，則提供整體組裝便利、操控容易， 及^幵使用哥命之功能。 綜上所述可知，本發明之此種伸縮梯，確實具有 提昇使用安全、收裝使用方便快速之功效，該等功效 12 1306915 :實：以改進習見梯子之缺失，而其並未見諸公開使 需陳明者，以上所述者乃是本發明二 =。實 ==發明之構想所作之改變，其產生之功: 本發明範圍内，合予陳明。 槓料4應在 13 1306915 【圖式簡單說明】 第1圖為習見梯架之立體圖。 第2圖為本發明收合平面示圖。 第3圖為本發明展開使用平面示圖。 第3A圖為第3圓之A部份放大圖。 之二發明之第-層梯柱單元與橫向梯板 梯心:::::?第，上梯柱單元與橫向 第6圖為本發明之梯柱單 &體圖。 早7與杈向梯板之組合 第7圖為本發明之梯知_ 剖面圖。 早70與橫向梯板之組 第8圖為本發明之實施例剖面示圖。 14 1306915 【主要元件符號說明】 1 :伸縮梯 3 :連接套件 5 :橫向梯板 21 :卡孔 22a :定位孔 23a :穿固孔 φ 25 :擋環 30 :貫穿孔 32 :軸接部 34 :定位榫頭 36 :注膠孔 38 :垂直 391、392 :凹槽 '· 4b :上層鎖固機構 ' 42 :鎖桿 44 :撥鍵 45a :連動鍵 4 6 :固定板 48 :連桿 413 :水平套管 423 :狹槽 2 :梯柱單元 4 :鎖固機構 2a :内梯柱單元 22 :定位孔 23 :穿固孔 24 :扣孔 26 :内凸環溝 31 :環套部 33 :螺絲 3 5 :黏液流道 37 :通道 321、322 :直立邊板槽 4a :第一層鎖固機構 41 :鎖閘 43 :彈簧 45 :連動鍵 451a :撥板 47 :手動控制鈕 410 :固定板 421、422 :嵌槽 424 : c形夾 15 1306915 425 :夾持部 441 :第一面板 442 :第二面板 443 :叉臂 444 :卡榫 44a :撥鍵 44b :撥鍵 442a ··第二面板 451 :撥板 452 :卡榫 453 :叉腳 461 :通孔 471 :導板 472 :水平槽溝 473 :槽道 51 :通孔 52 :第二通孔 53 :移位孔 5a:第二層橫向梯板 5 1 a :通孔 5b:第三層橫向梯板 6 :緩衝元件 61 :卡勾 62 :彈性封圈 16It can be seen that the extension ladder of the present invention is provided with a card hole 21, a clamp head 34 and a retaining ring 23 which can be quickly combined and positioned between the connection kit 3 and the ladder column unit 2, plus The mucus flow path 35 is placed again to make the overall tight fixation more reliable, and the locking mechanism 4 is provided in the connection kit 3, which provides the convenience of overall assembly, easy handling, and the function of using the sacred life. In summary, the extension ladder of the present invention has the advantages of improving safety of use, and convenient and quick use of the package. These effects 12 1306915: Actual: to improve the understanding of the ladder, and it has not been disclosed For those who need to be identified, the above is the second invention of the present invention. Real == Changes in the concept of invention, the merits of its creation: Within the scope of the invention, it is given to Chen Ming. Bar 4 should be 13 1306915 [Simplified illustration] Figure 1 is a perspective view of the ladder. Figure 2 is a plan view showing the folding of the present invention. Figure 3 is a plan view showing the development of the present invention. Figure 3A is an enlarged view of Part A of the third circle. The second layer of the ladder column unit and the lateral ladder plate The ladder core:::::?, the upper ladder column unit and the horizontal direction Fig. 6 is the ladder column single & Combination of early 7 and slanting ladders Fig. 7 is a cross-sectional view of the invention. Group of Early 70 and Lateral Ladders Fig. 8 is a cross-sectional view showing an embodiment of the present invention. 14 1306915 [Description of main components] 1 : Extension ladder 3 : Connection kit 5 : Horizontal ladder 21 : Hole 22a : Positioning hole 23a : Through hole φ 25 : Stop ring 30 : Through hole 32 : Shaft part 34 : Positioning hoe 36: injection hole 38: vertical 391, 392: groove '· 4b: upper locking mechanism' 42: lock lever 44: dial 45a: linkage key 4 6 : fixing plate 48: connecting rod 413: horizontal sleeve Tube 423: slot 2: ladder column unit 4: locking mechanism 2a: inner ladder column unit 22: positioning hole 23: through hole 24: button hole 26: inner convex ring groove 31: collar portion 33: screw 3 5 : Mucus flow passage 37: Channels 321, 322: Upright side plate groove 4a: First layer locking mechanism 41: Locking gate 43: Spring 45: Linking key 451a: Dialing plate 47: Manual control button 410: Fixing plates 421, 422 : slot 424 : c-clip 15 1306915 425 : clamping portion 441 : first panel 442 : second panel 443 : fork arm 444 : cassette 44a : dial button 44b : dial button 442a · · second panel 451 : dial Plate 452 : cassette 453 : fork 461 : through hole 471 : guide plate 472 : horizontal groove 473 : channel 51 : through hole 52 : second through hole 53 : displacement hole 5 a : second layer lateral ladder 5 1 a : through hole 5b: Three lateral risers 6: cushioning member 61: hook 62: elastic seals 16