200817578 九、創作說明： 【創作所屬之技術領域】 本創作係、—種升降、折合兩用梯，主要指—種可依需求調整 升条或折合使用，並可具較佳適用性。 【先前技術】 成含梯具主要為便於人們登高❹，並為便於人們於不同場合可 ΓΓ工作，習知產品係具村便於攜行之梯具，如折合梯即為常 之梯具’並其結構主要係具二對懸度之_，並於梯架上 塊框接，使得使用時可令二梯架展開，並令二梯架底 #者地支撐。 支而前述結構因可藉由二梯架展開時著地定位，不須靠牆即可 =力因而可具較佳適用性’然而因該二梯架不能展開使用，造 於必須攀登較高場合，且若增加二梯架長度時 以成梯具過長攜行不便情形。 又另-習知梯具有可升降之拉梯’並該拉梯係具二疊合之 、外梯具，並設置繩索、勾扣機構 應外梯上升並藉-機構定二=-令_ ，卿觸之 【創作内容】 ^才遍，蝴祕不佳缺失。 本創作之目的在於提供—種可依需求調整 的梯具，並可錄佳_性。 ^ a折。使用 200817578 並該夕物^梯、上套座、τ套座、拉伸機構組成， 曰/ —Γ仃直桿’並於直桿橫向設置若干横桿，又於二直 m、下定位塊’並虹定位塊寬度較τ定位塊小， 工植塊側方具可容置後述嵌塊之容置空間，又下定位塊盘 上定位塊·錢’並該紐具斜向部，麟下定倾一側何 供抵靠後繼之_卩^:鱗了繼蝴座，狀 外梯没置扣合機構，並該扣合機構具扣桿、固定片、接合片、彈 箐、旋紐’而該扣㈣為可折合桿體，並—端設置勾體，另一端 設置框孔；又固定片_設於外梯鱗上，並具大於前述扣桿寬 度之内凹部，且上方具抵靠部；又接合片翻設於固定片之内凹 部位置’並設置可穿伸旋紐之穿孔；又彈簀係設於片盘接合 片間；又旋蝴於下方設置可供抵靠彈簧底端之底板，並該底板 接合凸柱穿倾簧之錢及接糾之穿孔，又該餘上方具旋紐 板’並該旋純下方與前述凸柱接合，且該凸柱可穿伸扣桿之枢 孔’又該旋紐之長度大於前述内凹部寬度，並寬度小於内凹部寬 度’亚使組合後當扣桿折合時可旋轉餘令独板可藉由彈菁之 彈力而嵌入固^之内凹部内，並可同時壓掣扣桿嵌置於内凹部 内定位；又當欲令扣桿展料可上拉餘減轉，並使旋紐板二 端可抵罪於固定座之抵靠部上，且使扣桿可展開；又内梯具二平 仃直才干’亚該二直桿間距較外梯之二直桿間距小，並於二直桿間 。又置若干杈杯，又於二直桿上方外側外凸設置嵌塊，又於二直桿 内側下方②置彈性勾扣機構’並於直桿外側設置可供前述扣桿扣 6 200817578 合之扣體’又於二直桿下方設置斜邊；又上套座係-側設置接合 =並與外梯之直桿上方固接，並另—側設置套合部，並該套合部 -端具扣緣並可包覆部分_赌，且該上套絲部形成可供内 梯展開時抵靠㈣直桿側緣之抵㈣；又下套座係具固定體、扣 ^片’並該ϋ定體與内梯之直桿下錢接，並—端具崎應前述 肷塊厚度亚可限制外、内梯直桿間隔之凸部，又扣合片係具連桿 機構與_體樞接，並—端具可勾扣外梯直桿之勾扣部；又拉= _具輪體組、繩索，輪體組之輪體分別與上套座、内梯直 杯接合’亚繩索分別環繞輪體且端部分別上套座及㈣直桿下方 4置（扣版）接合，且使拉伸繩索可帶動内梯對應外梯升降動作· 藉之使平時收合時可令内、外梯疊置，並令下套座之扣合片勾扣 外梯直#，又内梯上方可藉由上套座以定位於外梯—側，並外、 ⑽可藉由錢抵靠下定倾之抵㈣定位；又欲攀登較高位置 才可拉伸拉伸機構之繩索，並使内梯可對應外梯上移，且上移時 下套座可對應於外梯直桿上移’並該凸部可防止外、内梯之直桿 _摩擦，並設於内梯之輪體可沿外梯直桿_，又同時藉由上 =雜合外、内梯’使得外、内梯可具有良好接合穩定性，且該 ^移至適當高度時可藉由勾扣機構勾扣外梯橫桿定位，並當扣 4上套座抵靠時可限制内梯最大上移高度；又欲收合外'内梯 ^可再拉伸繩索令勾扣機構與外梯橫桿脫離即可令外、内梯收 本創作當不能《壁支撐時可令下套座之扣封與外梯直 干μ又令内梯偏移並使内梯之嵌塊嵌入外梯上、下定位塊嵌 200817578 ===’使得外、内梯可展開著地支撐，並同時上套座之 直桿以增進更佳支樓性，又可令外梯之扣桿與 適用性功效。 切強度’使付本創作可具較佳 【實施方式】 請參閱第一圖，本創作包含外梯卜内梯2、二上套座3、二 =座4、拉伸機構5組成，並該外梯1具二平行直桿η，並於 # 11—間&向設置若干橫桿12，又於二直桿u上方内面設置 t下疋位塊13、14，並該上定位塊13寬度較下定位塊14小， 夏使上疋位塊13侧方具可容置後賴塊23之容置空間⑶，又 :疋位塊14與上定位塊13間具嵌槽141，並該喪槽⑷具斜向 部142，且該下定位塊14 一側具可供抵靠後述嵌塊23之抵靠部 ’又於—直桿11下方枢設止滑底座15，又於外梯1設置扣合 機構16’並该扣合機構16具扣桿161、固定片162、接合片1⑹、 彈簧164、旋鈕165，而該扣桿161係為可折合桿體，並一端設置 勾體1611，且另一端設置樞孔1612 ;又固定片162係固設於外梯 1直桿11上，並具大於前述扣桿161寬度之内凹部1621，且上方 抵罪邛1622,又接合片1(33係固設於固定片162之内凹部1621 位置，並設置可穿伸旋鈕165之穿孔1631 ;又彈簧164係設於固 疋片162與接合片163間；又旋钮165係於下方設置可供抵靠彈 汽164底端之底板1651，並該底板1651接合凸柱1652穿伸彈菩 164之簧圈及接合片163之穿孔比31，又該旋鈕165上方具旋鈕 200817578 板1653，並該旋鈕板1653與前述凸柱1652接合，且該凸柱1652 可穿伸扣桿161之樞孔1612，又該旋鈕板1653之長度大於前述 内凹部1621寬度，並寬度小於内凹部1621寬度。 内梯2具二平行直桿21，並該二直桿21間距較外梯丨之二 直桿11間距小，並於二直桿21間設置若干橫桿22，又於二直桿 21上方外侧外凸設置嵌塊23，又於二直桿21内側下方設置彈性 勾扣機構24，而該勾扣機構24與習知拉梯之勾扣機構類同，在 此不予多述，並於下方外側設置可供前述扣桿16扣合之扣體烈， 又於二直桿21下方設置斜邊211，而該斜邊211設置止滑墊： ,%併苓閱第一、三圖，上套座3係一側設置接合部31並 :、卜梯1之直杯11上方固接，並另一側設置套合部32，並該套 合部％ -端具扣、緣321並可包覆部分内梯之直桿21，且該上套 =底挪成可供_2展開時抵靠_2直桿2丨側緣之抵靠部 〇 犯請—併參閱第-、四圖’下套座4係具固定體41、扣合片 ::固定體41具—摩擦係數低之塊體與板體結合，並與内梯 Z之直#21下方固接，並一 制外、 一、力對應W述嵌塊23厚度並可限 光滑面，直桿U、21間隔之凸部犯，而該凸部4U為 端呈可如σ合片42係具連桿機構42丨與固定體41樞接，並-挪^、」勾扣外梯1直桿^ 定體41鎖合。 勺扣部422，且可設置鎖體423與固 袓伸機構5具輪體組、_^ , 〜系b2，亚該輪體組之輪體511、512 200817578 2與上套座3、内梯2直桿21接合， 511、512且端部八刖L备 刀剑衣％輪體 由.刀套座3及内梯2直桿21下方扣體25接合， 使^伸繩索52可帶動内梯2對應外梯丨升降動作。 、，❻五11，本創作平時收合時可令内、外梯j、2 宜置，亚令下套庙d 乙 4之扣合片42勾合外梯1直桿u， 由鎖體423鎖合以人 且了再糟 产0 防止扣合片42打開，又内梯2上方可辨由上奎 座3以定位於外梯丨 曰由上套 下定办^ 側亚外、内梯1、2可藉由嵌塊23抵靠 疋位塊u之抵靠部143定位（如第八圖所示）。 圖所示’本創作可旋轉旋紐165令旋叙板1653 $ 辜扣才干161甘欠置於内凹部咖内定位。 伸機槿Ί1弟四、六圖，本創作欲攀登較高位置時可拉伸拉 =㈣索52:並使㈣2可對細丨上移，且上移時下 梯二了對應:外梯1直桿u上移’並該β部411可防止外、内 外之直杯11、21抵觸摩擦，並設於内梯2之輪體512可沪 ::如1滑動’又同時藉由上套™ ^ 使件外、内梯1、2可呈有^ ^ 高声斤f + w 合敎性，且_梯2移至適當 问度日卞可措由勾扣機構24勾扣 … 與上套體3抵靠時可限制内梯2 ”干疋亚當扣體25 ，内梯2取大展開高度（圖中未顯示抵 又魏合外、_丨、2日村雜伸齡 與外梯1橫桿12脫離即可入夕卜. 城構24 _第七〜十-圖本^⑽合㈣二圖所示）° 3本創作當不能靠牆壁支撐時可令下套 200817578 座4之扣合片42鎖體423解開並令扣合片42與外梯i直桿u 脫離’又令内梯2偏移並使内梯2嵌塊23歲人外梯丨上、下定位 塊13、14鼓槽141之斜向部142内，使得外、内梯i、2可展開 著地支撐’並同時上套座3之抵靠部322可抵靠内梯2直桿Μ 以增進更佳支摟性，又本創作可旋轉旋钮165並令扣桿而展開 與内梯2之扣體25扣合明進梯具更佳支撑強度，使得本創作可 具較佳適用性功效。 此外’當梯具長度較短時該扣桿、扣體亦可不須設置即可具 有足夠支撐強度，並㈣機構獨設置，可由手部推内梯升降動 作’又下套座亦可不設置鎖體即可藉由連桿機構之慣性扣合，又 上、下套座亦可僅設置—組；又輪體組之輪體亦可與外梯直桿接 σ以取代組⑦於上套座上’而前述實施娜為本創作之例示，並 非作為本創作申請專利範圍限制。 【圖式簡單說明】 第一圖係本創作之分解示意圖。 第二圖係本創作之組合及外、内梯收合示意圖。 ^二圖係本創作之上套座與外、内梯組合關係剖視示意圖。 第四圖係本創作之下套座與外、内梯組合關係及扣合片扣合 剖視示意圖。 第五圖係本創作之扣合機構剖視及扣桿收合示意圖。 第六圖係本創作之⑽對應外梯上移示意圖。 第七圖係本創作之下套座之扣合片展開示意圖。 200817578 $八圖係本創作之外、㈣收合時部分舰示意圖。 第九圖係本創作之扣合機構之扣桿展開時剖視示 意圖。 第十圖係本創作之外、_展開剖視示意圖。 第十-圖係本創作之外、内梯整體展開示意圖。 【主要元件符號說明】 1外梯 11直桿 12橫桿 13上定位塊 131谷置空間14下定位塊 141嵌槽 142斜向部 143抵靠部 15底座 16扣合機構161扣桿 1611勾體 1612極孔 162固定片 1621内凹部 1622抵靠部 163接合片 1631穿孔 164彈簧 165旋紐 1651底板 1652凸柱 1653旋知板 2内梯 21直桿 211斜邊 22橫桿 23嵌塊 24勾扣機構25扣體 3上套座 31接合部 32套合部 321扣緣 322抵靠部 4下套座 41固定體 411凸部 42扣合片 421連桿機構422勾扣部 423鎖體 5拉伸機構 511輪體 512輪體 52繩索 12200817578 IX. Creation Description: [Technical field of creation] This creation department, a type of lifting and folding dual-purpose ladder, mainly refers to the type that can be adjusted according to the needs of the ascending or folding, and has better applicability. [Prior Art] The ladders are mainly for people to climb up, and in order to facilitate people to work in different occasions, the conventional products are easy to carry the ladders, such as folding ladders, which are common ladders. The structure is mainly equipped with two pairs of hanging degrees, and is framed on the ladder frame, so that the two ladder frames can be unfolded during use, and the second ladder frame bottom can be supported. Because the above structure can be positioned by the two ladders when unfolding, it is not necessary to lean against the wall, so the force can be better. However, since the two ladders cannot be used, it is necessary to climb higher occasions. And if the length of the two ladders is increased, it is inconvenient to carry the ladders too long. In addition, the conventional ladder has a ladder that can be lifted and lowered, and the ladder has two overlapping and outer ladders, and the ropes and hooking mechanisms are raised by the outer ladder and the mechanism is fixed by two =-order _, Qing touched [creative content] ^ only everywhere, the secret is not good. The purpose of this creation is to provide a ladder that can be adjusted according to needs, and can record good _ sex. ^ a fold. Use 200817578 and the maturity of the ladder, the upper seat, the τ seat, the stretching mechanism, 曰 / - Γ仃 straight rod 'and set a number of crossbars in the horizontal direction of the straight rod, and in the second straight m, the lower positioning block ' The width of the red positioning block is smaller than that of the τ positioning block, and the side of the planting block can accommodate the accommodating space of the embedded block, and the positioning block on the locating plate and the slanting part of the slanting part. The one side is for the succession of the _卩^: the scale is followed by the butterfly seat, the outer ladder has no fastening mechanism, and the fastening mechanism has a buckle, a fixed piece, a joint piece, a magazine, a knob The buckle (4) is a foldable rod body, and the hook body is arranged at the end, and the frame hole is arranged at the other end; the fixed piece _ is disposed on the outer step scale, and has an inner concave portion larger than the width of the buckle rod, and the upper portion has an abutting portion; Further, the engaging piece is turned over in the concave portion of the fixing piece and is provided with a perforation capable of penetrating the knob; and the magazine is disposed between the plate engaging pieces; and the bottom of the ring is arranged to abut the bottom end of the spring. And the bottom plate engages the protuberances to wear the reversing spring and the perforations of the rectifying and reaming, and the remaining upper portion has a rotating plate" and the spiral is purely below and the aforementioned convex The column is engaged, and the protrusion can extend through the pivot hole of the buckle rod, and the length of the knob is larger than the width of the inner concave portion, and the width is smaller than the width of the inner concave portion, so that the combination can be rotated when the buckle is folded It can be embedded in the inner recess of the solid by the elastic force of the elastic, and can be placed in the inner concave portion at the same time; and when the buckle is to be pulled up, the knob can be rotated and the knob is turned The two ends of the board can be sinned against the abutment of the fixed seat, and the buckle can be unfolded; and the inner ladder has two flat and straight stems. The distance between the two straight rods is smaller than the distance between the two straight rods of the outer ladder, and two Straight between the bars. A plurality of cups are placed, and the inserts are arranged outwardly on the outer side of the two straight rods, and the elastic hooking mechanism is disposed on the inner side of the two straight rods, and the buckle rods are provided on the outer side of the straight rods. The body 'is also provided a beveled edge below the two straight rods; the upper sleeve is set to the side-side joint and is fixed to the upper side of the straight ladder, and the other side is provided with the sleeve portion, and the sleeve portion-end piece The buckle edge can cover part of the gambling, and the upper threading portion is formed to abut against the side edge of the straight rod when the inner ladder is deployed (four); and the lower sleeve is fixed with the fixing body and the buckle piece The straight body of the fixed body and the inner ladder are connected with the money, and the end of the block should be limited to the thickness of the outer block and the inner leg straight rod, and the buckle mechanism and the _ body pivot joint And the end can be hooked to the hook of the outer ladder straight rod; pull = _ with wheel body group, rope, wheel body group wheel body respectively with the upper sleeve, the inner ladder straight cup joint 'sub ropes respectively The wheel body and the end part respectively are respectively sleeved and (4) the lower part of the straight rod is engaged with the 4th (deduction plate), and the tension rope can drive the inner ladder corresponding to the outer ladder lifting movement. The inner and outer ladders can be stacked, and the buckle piece of the lower sleeve can be hooked to the outer ladder straight, and the upper part of the inner ladder can be positioned on the outer ladder-side by the upper sleeve, and the outer (10) can be borrowed The money is placed against the lower limit (4); if you want to climb a higher position, the rope of the stretching mechanism can be stretched, and the inner ladder can be moved up to the outer ladder, and the upper seat can correspond to the outer ladder when moving up. The straight rod moves up' and the convex part can prevent the straight rod of the outer and inner ladders_friction, and the wheel body set on the inner ladder can be along the outer ladder straight rod_, and at the same time by the upper=hybrid outer and inner ladder' The outer and inner ladders can have good joint stability, and the hook can be hooked to the outer ladder rail by the hook mechanism, and the inner ladder can be limited when the sleeve 4 is abutted. Move the height; also want to close the outer 'internal ladder ^ can re-stretch the rope so that the hook mechanism and the outer ladder crossbar can be separated, so that the outer and inner ladders can not be used for the creation of the lower seat. The seal and the outer ladder are directly dry and μ, and the inner ladder is offset, and the inner block insert is embedded on the outer ladder, and the lower positioning block is embedded with 200817578 ===', so that the outer and inner ladders can be deployed on the ground and simultaneously Straight sets of seat to enhance better support of the House, but also make the trip lever outside ladder efficacy and applicability. The cutting strength can make the creation of the present invention better. [Embodiment] Please refer to the first figure. This creation consists of the outer ladder inner ladder 2, the second upper sleeve 3, the second = seat 4, and the stretching mechanism 5, and The outer ladder 1 has two parallel straight rods η, and a plurality of cross bars 12 are arranged in the direction of #11-, and t-clamping blocks 13, 14 are disposed on the inner surface above the two straight rods u, and the width of the upper positioning block 13 is Compared with the lower positioning block 14, the upper side of the upper block 13 can accommodate the accommodating space (3) of the block 23, and the slab 141 between the squat block 14 and the upper positioning block 13 The groove (4) has an inclined portion 142, and the lower positioning block 14 has abutting portion A for abutting the insert 23 to be described later, and a sliding base 15 is disposed below the straight rod 11, and is disposed on the outer ladder 1 The fastening mechanism 16 ′ and the fastening mechanism 16 have a buckle 161 , a fixing piece 162 , an engaging piece 1 ( 6 ) , a spring 164 , a knob 165 , and the fastening rod 161 is a foldable rod body, and a hook body 1611 is disposed at one end, and The other end is provided with a pivot hole 1612; and the fixing piece 162 is fixed on the outer ladder 1 straight rod 11 and has an inner concave portion 1621 larger than the width of the above-mentioned fastening rod 161, and the upper portion is sin 1622, and the engaging piece 1 (33 series) The fixing piece 162 is disposed at the position of the concave portion 1621, and is provided with a through hole 1631 through which the knob 165 can be inserted; the spring 164 is disposed between the fixing piece 162 and the engaging piece 163; and the knob 165 is disposed below to be placed against the elastic The bottom plate 1651 of the bottom end of the steam 164, and the bottom plate 1651 engages the stud 1652 to penetrate the coil of the spring 164 and the perforation ratio 31 of the engaging piece 163, and the knob 165 has a knob 200817578 plate 1653, and the knob plate 1653 and The protrusions 1652 are engaged, and the protrusions 1652 can extend through the pivot hole 1612 of the buckle 161. The length of the knob plate 1653 is greater than the width of the inner recess 1621 and the width is smaller than the width of the inner recess 1621. The inner ladder 2 has two parallel The straight rod 21 has a smaller pitch than the two straight rods 11 of the outer step, and a plurality of cross bars 22 are disposed between the two straight rods 21, and the inserts 23 are convexly disposed on the outer side of the two straight rods 21. And an elastic hooking mechanism 24 is disposed below the inner side of the two straight rods 21, and the hooking mechanism 24 is similar to the hooking mechanism of the conventional ladder, and will not be described here, and the buckle is provided on the lower outer side. The buckle 16 of the rod 16 is fastened, and the oblique side 211 is disposed below the two straight rods 21, and the inclined The side 211 is provided with a non-slip mat: , % and the first and third figures are arranged, and the joint portion 31 is disposed on one side of the upper sleeve 3 and is: the upper cup 11 of the ladder 1 is fixedly fixed, and the other side is sleeved. a portion 32, and the sleeve portion %-end has a buckle, a rim 321 and can cover a straight rod 21 of a part of the inner ladder, and the upper sleeve=bottom is formed to be _2 when it is deployed to abut the straight rod 2丨The abutting part of the side edge is required - and refer to the first and fourth figures's lower seat 4 series with fixed body 41, fastening piece:: fixed body 41 - the block with low friction coefficient is combined with the plate body, and It is fixed under the straight #21 of the inner ladder Z, and the outer part, the first force corresponds to the thickness of the insert block 23 and can be limited to the smooth surface, and the convex portion of the straight rod U and 21 is broken, and the convex portion 4U is The end of the splicing piece 42 can be pivotally connected to the fixed body 41 by the link mechanism 42, and the outer block 1 can be locked. The scoop button portion 422 is provided, and the lock body 423 and the solid exfoliation mechanism 5 are provided with a wheel body set, _^, ~ b2, the wheel body 511, 512 200817578 2 and the upper set seat 3, the inner ladder 2 Straight rod 21 joints, 511, 512 and end gossip L preparation sword clothing% wheel body is engaged by the knife sleeve base 3 and the inner ladder 2 straight rod 21 below the buckle body 25, so that the extension rope 52 can drive the inner ladder 2 Corresponding to the lifting action of the outer ladder. ❻五11, this creation can be used to make the inner and outer ladders j and 2 suitable for the purpose of the collection, the order of the next set of temples d B 4 of the buckle piece 42 hooking the outer ladder 1 straight rod u, by the lock body 423 The lock is combined with the person and the bad production is 0. The buckle piece 42 is prevented from being opened, and the upper part of the inner ladder 2 can be identified by the upper squad seat 3 to be positioned on the outer step 丨曰, and the upper set is set by the upper set. 2 can be positioned by the insert 23 against the abutment portion 143 of the clamp block u (as shown in the eighth figure). As shown in the figure, 'this creation can rotate the knob 165 to make the orientation plate 1653 $ 才 才 161 甘 置于 置于 置于 置于 置于 置于 置于 置于 置于 置于 。 。 。 。 。 。 。 Stretching machine 槿Ί 1 brother four or six pictures, this creation can be stretched when climbing to a higher position = (four) cable 52: and (4) 2 can move up the fine squat, and when moving up, the next step is two: the outer ladder 1 The straight rod u is moved up' and the β portion 411 can prevent the outer cups 11 and 21 of the outer and inner surfaces from coming into contact with the friction, and the wheel body 512 disposed on the inner ladder 2 can be: "sliding as 1" and simultaneously by the upper sleeve TM ^ Make the outer and inner ladders 1, 2 can be ^ ^ high sound jin f + w merging, and _ ladder 2 moved to the appropriate degree of time can be hooked by the hook mechanism 24 hook ... with the upper body 3 When the ring is reached, the inner ladder can be restricted. 2" Drying Adam buckle body 25, the inner ladder 2 takes a large deployment height (the figure does not show the arrival of Weihe, _丨, 2 days, the village extension and the outer ladder 1 horizontal The rod 12 is detached and can be inserted into the eve. The city structure 24 _ seventh to ten-picture book ^ (10) combination (four) two pictures) ° 3 This creation can be used to support the next set of 200817578 seat 4 when it can not be supported by the wall 42 lock body 423 is untied and the buckle piece 42 is separated from the outer ladder i straight rod u. The inner ladder 2 is offset and the inner ladder 2 is embedded in the 23-year-old outer ladder. The upper and lower positioning blocks 13 and 14 are drums. The oblique portion 142 of the groove 141 allows the outer and inner steps i, 2 to be deployed to support the same The abutting portion 322 of the upper sleeve 3 can abut the inner ladder 2 straight rod Μ to improve the better supportability, and the creation can rotate the knob 165 and expand the buckle rod to buckle with the buckle body 25 of the inner ladder 2 The better support strength of the ladder allows the creation of the creation to have better applicability. In addition, when the length of the ladder is short, the buckle and the buckle body can have sufficient support strength without setting, and (4) the mechanism is set independently. The lift can be lifted by the hand. The lower seat can also be fastened by the inertia of the link mechanism without the lock body. The upper and lower sleeves can also be set only—the wheel of the wheel set. The body can also be connected to the outer ladder straight rod to replace the group 7 on the upper sleeve seat', and the aforementioned implementation of the present invention is an example of the creation, not as a limitation of the scope of the patent application. [Simplified illustration] The first picture is The second diagram is a schematic diagram of the combination of the creation and the combination of the outer and inner ladders. ^ The second diagram is a schematic cross-sectional view of the combination of the outer and inner ladders on the creation. The fourth picture is the creation of the creation. The schematic diagram of the combination of the lower seat and the outer and inner ladders and the fastening of the buckle piece. The five figures are the schematic diagram of the folding mechanism of the creation and the folding of the buckle. The sixth picture is the schematic diagram of the upper part of the creation (10) corresponding to the upward movement of the outer ladder. The seventh picture is a schematic diagram of the expansion of the buckle piece under the creation. 200817578 $8 is a schematic diagram of some ships outside the creation and (4) at the time of folding. The ninth picture is a schematic cross-sectional view of the fastening mechanism of the fastening mechanism of the present creation. The tenth picture is outside the creation, _expansion The tenth-picture is a schematic diagram of the overall development of the inner ladder outside the creation. [Main component symbol description] 1 outer ladder 11 straight rod 12 crossbar 13 on the positioning block 131 valley space 14 lower positioning block 141 slot 142 oblique Toward portion 143 abutment portion 15 base 16 fastening mechanism 161 buckle 1611 hook body 1612 pole hole 162 fixing piece 1621 inner recess 1622 abutment portion 163 joint piece 1631 perforation 164 spring 165 knob 1651 bottom plate 1652 stud 1653 2 inner ladder 21 straight rod 211 oblique side 22 crossbar 23 insert block 24 hook mechanism 25 button body 3 upper sleeve 31 joint portion 32 sleeve portion 321 buckle edge 322 abutment portion 4 lower sleeve 41 fixed body 411 convex portion 42 fastening piece 421 linkage mechanism 422 hooking part 423 lock body 5 pull Mechanism 511 cable body 512 52 12