201016377 六、發明說明： 【發明所屬之技術領域】 本發明與用以支樓工具機之支揮架有關，特別是有關 於一種可提供易於操作收合與展開的支撐架。 【先前技術】 ❹ 中華民國公告編號第肋3664號專利案揭露出 機器用之可收折域架，其主要包含有—支撐Μ多數可 相對支撐台樞轉之支標腳。當展開時，係利用多數 固定件將該等支揮腳加關定，而當收折時，則是利用夕 數個第二固定件將該等支撐腳加以固定。 夕 然而，此專利案之支揮架於收折時，該等支撐腳係靠 合於支撑台之底側，使紐架平置於地面ρ若使用者 將支撐架展_ ’必須將腰部料很低或者整個人 來’才能將該等第二固定件㈣以便樞轉該等域腳。但 是支撐台的上方往往都會連接著相當重的機器（如桌鑛 機），因此，，在收合與展開支揮架的過程中，使用者很容易 因施力不當而造成身體的受傷。 【發明内容】 本發明之主要目的在於提供一種用於支樓工具機之支 撲木其可提供易於操作之收合方式，以有效避免造成使 用者的身體於收合與展開切架過程中受到傷害。 為達成上述目的’本發明之切純含有—承載平 201016377 二::框厂支撐件與-對連桿。該承載平台具有-第 載平=;=第_側邊之第二側邊;該基框柩接該承 連桿：:1二該支揮件以其頂端柩接該基框·•該等 該承載平台之第二側邊與該基框= 置時，ΐ帶側邊沿著該基框滑移至-第1201016377 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a support for a building machine tool, and more particularly to a support frame that provides easy handling and deployment. [Prior Art] ❹ The Republic of China Announcement No. 3664 Patent Case reveals a retractable domain frame for machines, which mainly includes a support foot that supports a plurality of pivots relative to the support table. When unfolding, the support members are fixed by a plurality of fixing members, and when the folding is performed, the support members are fixed by a plurality of second fixing members. However, in the case of the patent case, when the support is folded, the support legs are hinged to the bottom side of the support table, so that the frame is placed on the ground ρ. If the user will support the support _ 'must the waist material Very low or the whole person can't use the second fixture (4) to pivot the legs. However, the upper part of the support table is often connected to a relatively heavy machine (such as a table miner). Therefore, during the process of folding and unfolding the swing, the user is easily injured by improper force. SUMMARY OF THE INVENTION The main object of the present invention is to provide a support for a branching machine tool that can provide an easy-to-operate folding mode to effectively avoid the user's body being subjected to the process of folding and unfolding. hurt. In order to achieve the above object, the cut-off containing of the present invention-bearing flat 201016377 2:: frame factory support and - pair of connecting rods. The carrying platform has a second side of the first side of the first side; the second side of the first side of the first side; the base frame is connected to the receiving link:: 1 2, the supporting member is connected to the base frame by the top end thereof When the second side of the carrying platform and the base frame are set, the side of the strap is slid along the base frame to -1st
=”基框’接著再讓該支撑件朝該基框枢;上 位，妓献合；t該切件 使該 ::定=再讓該承載平 位置時，可帶動該等連桿之兩端樞轉， 承載平台之第二側邊遠_基框，料成展開。 、藉此’本發明之支標架不需讓使用者過度弯腰即 f收合與展開作業’可有效避免使用者在收合與展開支撐 架的過程中傷及身體。 【實施方式】 兹配合圖式列舉以下較佳實施例，用以對本發明之結 構及功效進行詳細說明。 請先參閱第-圖，為本發明第一較佳實施例之支撐架 (ίο)。支撐架(ίο)包含有一承載平台(2〇)、一基框(3〇)、一 支撐件(40)、一對彈性件(50)與一對連桿(6〇)。 承載平台（20)的上方可用以接設一工具機（圖中未 不）’工具機可為桌鋸機、斜口鋸機、線鋸機、帶鋸機、鑽 孔機、磨砂機等其中一種。承載平台(2〇)具有一第一側邊 5 201016377 (22)、一第二側邊(24)、一第三側邊(26)與一第四側邊(28)， 其中第一側邊(22)與第二側邊(24)的左右兩端分別具有一 樞接部(221 ’241)，且第一側邊(22)之樞接部(221)樞設有一 固定件(223) ’該固定件(223)具有一扳動端(223a)、一復位 彈簧(223b)及一具弧狀面之抵靠端(223c)，如第二圖與第三 圖所示。 基框(30)具有二支撐桿(32，34)，該等支撐桿(32，34) 之頂端藉由一滑套(36)樞設於承載平台(2〇)之第一側邊(22) 的樞接部(221) ’且該等支撐桿(32 , 34)之頂端向上延伸並 相互連接而形成一可供使用者握持之握持部(3〇2);各支撐 桿(32 ’ 34)之底端樞設有一抵靠於地面之滾輪(38),且各支 撐桿(32，34)之底端經彎折並相互連接而形成一可支撐於 地面之支撐部(304)。另外，基框(30)之其中一支撐桿(32) 頂端具有一個向内外兩側突出之第一凸部(322)，可被固定 件(223)之抵靠端(223c)所抵靠，如第三圖所示，而基框(3〇) 之另一支撐桿(34)靠近底端的位置設有一卡合件(342);該 等支撐桿(32，34)靠近底端的位置藉由一第一橫桿(3〇6)相 互連接以增加基框(3〇)的結構強度，且各支撐桿(32，34) 於靠近底端的位置設有-墊塊(35)。此外，各支撑桿(32， 34)的中段具有—第二樞接部(324，344)與—第—框接部 (326 ’ 346) ’其中各第一樞接部(326，346)具有一凹部(37)， 各凹4(37)具有一第一端部(372)及一第二端部⑽），如 第四圖與第五圖所示。 支揮件(40)具有一對支腳_，她)，各支腳(4〇a，4〇b) 6 201016377 之頂端樞設於各支撐桿(32 ’ 34)之第一樞接部(326，346) 而與基框(30)形成交叉配置，各支腳(40a，40b)之底端則抵 靠於地面。各支腳(40a ’ 40b)之頂端鎖設一個螺絲而形成 一向外突出之第二凸部(42)，可抵靠至各支撐桿(32，34) 之第一樞接部(326，346)之凹部(37)的第二端部(374)，使該 等支腳(40a，40b)被定位在展開的狀態，如第二圖與第四 圖所示；當各支腳(40a，40b)之第二凸部（42)隨各支腳 (40a，40b)朝該基框(30)樞轉而貼近該基框(3〇)而抵靠至各 支樓桿(32，34)之第一枢接部(326，346)之凹部(37)的第一 端部(372)時’其中一支腳(40b)可被基框(30)之卡合件(342) 卡合’用以被定位在收合的狀態；另外，該等支腳(4〇a， 40b)於靠近底端的位置藉由一第二橫桿(44)相互連接，以增 加該等支腳(40a，40b)的結構強度。 該等彈性件（50)分別套設於基框(3〇)之該等支撺桿 (32，34)，其兩端分別抵住各滑套(36)與各支撐桿(32，34) 之第一樞接部(326，346)。 各連桿(60)的兩端分別柩接承載平台(2〇)之第二側邊 (24)的樞接部(241)與各支撐桿(32，34)之第二樞接部(324， 344)。 菖使用者欲收合支樓架（10)時，先壓抵固定件(223)之 扳動端(223a)，使固定件(223)之抵靠端(223c)脫離支撐桿 (32)之第一凸部(322)，接著壓抵承載平台（2〇)之第二側邊 (24)，迫使該等連桿(60)之兩端樞轉，並可藉由各支撐桿 (32 ’ 34)之墊塊(35)作為該等連桿(6〇)下壓時的緩衝，同時， 7 201016377 承載平台（20)之第一側邊(22)將沿著基框(3〇)之支撐桿 (32，34)往下滑移至-第-位置，並透過該等滑套(Μ服縮 該等彈性件(5〇)，該等彈性件(50)將提供阻抗的力量，使承 載平台(20)可平穩地降低高度，直至承載平台(2〇)之第二侧 邊(24)貼近基框(3〇)，此時，承載平台⑽及其上接設的工 具機的重心，也隨著往下移動，如第四圖所示，有助於支 撐架⑽平穩的移行與J[立放置。接著再迫使該等支腳 ❹ （40a’40b)朝著基框(3〇)樞轉，直到支腳(40b)被卡合件(342) 卡住而無法相對基框(3〇)樞轉，如第五圖所示，如此一來， 使用者即可握住握持部(302)並藉由該等滾輪(38)之滾動， 使支撐架（10)往前移行，亦可藉由支撐部(3〇4)而使支撐架 (1〇)直立於地面。 當使用者欲展開支撐架（1〇)時，先拉動第二橫桿(44)， 使支腳(40b)脫離卡合件(342)而朝著遠離基框(3〇)的方向樞 轉，直到各支腳(40a，40b)之第二凸部(42)抵靠於各支撐桿 ❹ （32，34)之第一樞接部(326，346)之凹部(37)的第二端部 (374)，以完成該等支腳(4〇a，4〇b)的定位，如第四圖所示。 接者再拉動承載平台(20)之第二側邊(24)，該等彈性件(5〇) 將提供彈力推頂該等滑套(36)，讓使用者可較為輕鬆地將 ^ 承載平台(20)拉起，使承載平台(2〇)之第一侧邊(22)可沿著 基框(30)之支撐桿(32 ’ 34)往上滑移至一第二位置，當承載 平台(20)之第一側邊(22)滑移至第二位置時，滑套(36)會抵 頂支撐桿(32)之第一凸部(322) ’同時，該等連桿(6〇)之兩端 將被承載平台(20)帶動而產生樞轉，直到承載平台(2〇)之第 8 201016377 二側邊(24)遠離基框(30)而被該等連桿(6〇)撐起一預定高 度’如第-圖與第二圖所示，最後固定件(223)之抵靠端 (223c)將抵靠支揮桿(32)之帛—凸部(322)，使承載平台(2〇) 固定不再滑移，即完成支撐架（10)的展開。 請再參閱第六圖與第七圖，為本發明第二較佳實施例 之支㈣(7〇)。本實施例之域架⑽省略掉彈性件的設 計，而包含有一驅動件(9〇)。 驅動件(90)具有-踏桿(92)與二側桿(94)。該等側桿(94) 分別樞接於基框(76)之支撑桿(762)的第二框接部(768)而與 該等連桿师目互樞接，並分取其底鱗接踏桿(92)的兩 端’而分別以其頂端連接於該等連桿_，其頂端至 二樞接部_的距離約略為其底端至該第二樞； 的距離的五分之一至三分之一。= "base frame" then the support member is pivoted toward the base frame; the upper position, the 妓 妓 ;; t the cutting member makes the:: = = when the load is placed in a flat position, the two ends of the connecting rod can be driven Pivoting, the second side of the carrying platform is far away from the base frame, and the material is unfolded. Thus, the 'bracket of the present invention does not need to bend the user excessively, that is, the f-folding and unfolding operation' can effectively avoid the user. In the process of folding and unfolding the support frame, the body is injured. [Embodiment] The following preferred embodiments are listed with reference to the drawings to explain the structure and function of the present invention in detail. The support frame of the first preferred embodiment includes a carrying platform (2〇), a base frame (3〇), a support member (40), and a pair of elastic members (50). A pair of connecting rods (6〇). Above the carrying platform (20) can be used to connect a machine tool (not shown). The machine tool can be a table saw machine, a diagonal saw machine, a wire saw machine, a band saw machine. One of the drilling machine, the sanding machine, etc. The carrying platform (2〇) has a first side 5 201016377 (22), a second side (24), a third a side edge (26) and a fourth side edge (28), wherein the first side edge (22) and the second side edge of the second side edge (24) respectively have a pivoting portion (221 '241), and the first The pivoting portion (221) of the side edge (22) is pivotally provided with a fixing member (223). The fixing member (223) has a pulling end (223a), a return spring (223b) and a curved surface. The end (223c) is as shown in the second and third figures. The base frame (30) has two support bars (32, 34), and the top ends of the support bars (32, 34) are supported by a sliding sleeve (36). a pivoting portion (221) pivotally disposed on the first side edge (22) of the carrying platform (2) and extending at the top end of the supporting rods (32, 34) and interconnecting to form a user Holding the grip portion (3〇2); the bottom end of each support rod (32'34) is pivotally provided with a roller (38) abutting against the ground, and the bottom ends of the respective support rods (32, 34) are bent Folding and interconnecting to form a support portion (304) that can be supported on the ground. In addition, one of the support rods (32) of the base frame (30) has a first convex portion (322) protruding toward the inner and outer sides. Can be abutted by the abutting end (223c) of the fixing member (223), as shown in the third figure, and the base frame (3〇) A supporting member (34) is provided with a engaging member (342) near the bottom end; the positions of the supporting rods (32, 34) near the bottom end are connected to each other by a first cross bar (3〇6) to increase the base frame. (3〇) structural strength, and each support rod (32, 34) is provided with a spacer (35) at a position near the bottom end. Further, the middle portion of each support rod (32, 34) has a second pivot portion (324, 344) and - the first frame (326 '346) 'where each of the first pivoting portions (326, 346) has a recess (37), each recess 4 (37) has a first end ( 372) and a second end (10), as shown in the fourth and fifth figures. The support member (40) has a pair of legs _, she), and the top ends of the legs (4〇a, 4〇b) 6 201016377 are pivotally disposed at the first pivoting portions of the respective support bars (32 '34) ( 326, 346) and intersecting with the base frame (30), the bottom ends of the legs (40a, 40b) abut against the ground. The top end of each leg (40a '40b) is locked with a screw to form an outwardly projecting second protrusion (42) which can abut against the first pivoting portion of each of the support rods (32, 34) (326, 346) a second end (374) of the recess (37) such that the legs (40a, 40b) are positioned in an unfolded state, as shown in the second and fourth figures; when the legs (40a, The second protrusion (42) of 40b) pivots toward the base frame (30) with the legs (40a, 40b) to abut the base frame (3〇) and abut against the branch poles (32, 34) When the first end (372) of the recess (37) of the first pivoting portion (326, 346) is 'one of the legs (40b) can be engaged by the engaging member (342) of the base frame (30)' In order to be positioned in the collapsed state; in addition, the legs (4〇a, 40b) are connected to each other at a position near the bottom end by a second crossbar (44) to increase the legs (40a, Structural strength of 40b). The elastic members (50) are respectively sleeved on the support rods (32, 34) of the base frame (3〇), and the two ends thereof respectively abut against the sliding sleeves (36) and the respective support rods (32, 34) The first pivoting portion (326, 346). The two ends of each connecting rod (60) respectively connect the pivoting portion (241) of the second side (24) of the carrying platform (2) and the second pivoting portion of each of the supporting rods (32, 34) (324) , 344). When the user wants to close the support frame (10), first press the trigger end (223a) of the fixing member (223) to disengage the abutting end (223c) of the fixing member (223) from the support rod (32). The first protrusion (322) is then pressed against the second side (24) of the carrying platform (2〇), forcing the two ends of the links (60) to pivot and can be supported by the respective support rods (32' 34) The pad (35) serves as a buffer for the connecting rods (6〇) when pressed, and at the same time, the first side edge (22) of the 2010 platform of the load bearing platform (20) will follow the base frame (3〇) The support rods (32, 34) are moved down to the -first position, and through the sliding sleeves (the elastic members (5 inches) are contracted, the elastic members (50) will provide the strength of the impedance, so that The carrying platform (20) can smoothly reduce the height until the second side (24) of the carrying platform (2) is close to the base frame (3〇), at this time, the center of gravity of the carrying platform (10) and the machine tool connected thereto , as well as moving down, as shown in the fourth figure, to facilitate the smooth movement of the support frame (10) and the J [placement. Then force the pedals (40a'40b) towards the base frame (3〇 ) pivot until the foot (40b) is caught by the engaging member (342) and cannot be opposed to the base frame (3〇) Pivoting, as shown in the fifth figure, so that the user can hold the grip portion (302) and roll the support frame (10) forward by the rolling of the rollers (38). The support frame (1〇) can be erected to the ground by the support portion (3〇4). When the user wants to unfold the support frame (1〇), first pull the second cross bar (44) to make the foot (40b) Disengaging from the engaging member (342) and pivoting away from the base frame (3〇) until the second convex portion (42) of each of the legs (40a, 40b) abuts against each of the support rods (32, 34) a second end (374) of the recess (37) of the first pivoting portion (326, 346) to complete positioning of the legs (4〇a, 4〇b), as shown in the fourth figure The picker then pulls the second side (24) of the carrying platform (20), and the elastic members (5〇) will provide elastic force to push the sliding sleeves (36), so that the user can more easily ^ The carrying platform (20) is pulled up so that the first side edge (22) of the carrying platform (2) can be slid up to a second position along the support bar (32 '34) of the base frame (30). When the first side edge (22) of the carrying platform (20) is slid to the second position, the sliding sleeve (36) will abut the first convex portion of the supporting rod (32) ( 322) 'At the same time, the two ends of the connecting rods (6〇) will be pivoted by the carrying platform (20) until the 8th 201016377 side of the carrying platform (2〇) is away from the base frame (24) 30) and being supported by the connecting rods (6〇) by a predetermined height, as shown in the first and second figures, the abutting end (223c) of the final fixing member (223) will abut against the support rod (32). The ridge - the convex portion (322), so that the bearing platform (2 〇) is fixed and no longer slips, that is, the deployment of the support frame (10) is completed. Please refer to the sixth and seventh figures, respectively, for the support (4) (7〇) of the second preferred embodiment of the present invention. The domain frame (10) of this embodiment omits the design of the elastic member and includes a driving member (9 turns). The drive member (90) has a - step bar (92) and two side bars (94). The side rods (94) are respectively pivotally connected to the second frame portion (768) of the support rod (762) of the base frame (76) to be pivotally connected with the connecting rods, and the bottom scales are separated. The two ends of the stepping lever (92) are respectively connected to the connecting rods _ with their top ends, and the distance from the top end to the two pivoting portions _ is approximately one-fifth of the distance from the bottom end to the second pivot; To one third.
當制者欲收合支撐架⑽時，首先叫腳踩動踏桿 (92)以透過該等連桿(8G)而提供—支撐力於承載平 第二側邊(724) ’接著再解除固定件⑽與支撐桿_之第 予的卡合狀態。如此—來’即可慢慢鬆放施 予踏杯(92)之力量’使承載平_)之第 框⑽之支鄉2)往下滑移至第一位 = ，第二側邊(7事近基框(76)，如第八圖所示承= ==8)被卡合件⑽)卡住而無法相對基綱 樞轉，如第九圖所示，以完成收合。 :使用者欲展開切架⑽時，先解除料支腳⑽ 件(764)之_卡合狀態，如第人圖所示，接著再施 9 201016377 力踩動踏桿(92)，該等連桿(80)將被該等側桿(94)帶動而迫 使其兩端產生樞轉，用以將承載平台（72)之第二側邊(724) 推離基框(76)而將承載平台（72)之第二侧邊(724)撐起該預 定高度’同時’承載平台(72)之第一側邊(722)將沿著基框 " (76)之支撐桿(762)往上滑移至第二位置。最後再將固定件 (74)卡合於支撐桿(762)之第一凸部(766)，使承載平台(72) 固定不再滑移，即完成展開。 ❹ 藉此，本發明之支撐架不僅具有良好的支撐效果，而 且’本發明之支撐架在收合後並非緊貼於地面，讓使用者 不需要過度的彎腰即可輕鬆地完成收合與展開支撐架，以 避免對使用者的身體造成傷害。 以上所述，僅為本發明之較佳實施例的詳細說明與圖 示，凡合於本發明申請專利範圍之精神與其類似變化之實 施例，皆包含於本發明的範鹫中，任何熟悉該項技藝者在 本發明之領域内，可輕易思及之變化或修飾皆可涵蓋在以 鲁 下本案之專利範圍。 201016377 【圖式簡單說明】 圖為本發明第—較佳實施例展開時之立體圖。 承載平本=第-較佳實施例之侧視圖’主要顯示 :之第-側邊位於第二位置之狀態。 於基第二圖之局部放大圖，主要顯示固定件抵靠 主要顯示 圖’主要When the maker wants to retract the support frame (10), the foot is first stepped on the pedal (92) to provide a support force through the links (8G) to support the flat second side (724) 'and then unfixed The engagement state of the member (10) and the support rod _. So - you can slowly release the force of the tread cup (92) to make the support box (10) of the frame (10) 2) slide down to the first position =, the second side (7 The near frame (76), as shown in the eighth figure, ===8) is stuck by the engaging member (10) and cannot pivot relative to the basic, as shown in the ninth figure, to complete the folding. : When the user wants to unfold the cutting frame (10), first release the snapping state of the material foot (10) (764), as shown in the figure of the first person, and then apply 9 201016377 to force the pedal (92). The rod (80) will be driven by the side bars (94) to force pivoting of the ends thereof to push the second side (724) of the carrier platform (72) away from the base frame (76) to carry the platform The second side (724) of (72) props up the predetermined height 'while' the first side (722) of the carrying platform (72) will be up the support bar (762) of the base frame " (76) Slide to the second position. Finally, the fixing member (74) is engaged with the first convex portion (766) of the supporting rod (762), so that the supporting platform (72) is fixed and no longer slips, that is, the deployment is completed.借此 In this way, the support frame of the present invention not only has a good supporting effect, but also the support frame of the present invention is not close to the ground after folding, so that the user can easily complete the folding without excessive bending. Unfold the support frame to avoid injury to the user's body. The above is only the detailed description and illustration of the preferred embodiments of the present invention, and the embodiments of the invention and the similar variations thereof are included in the scope of the present invention, any familiar Those skilled in the art, within the scope of the present invention, may readily appreciate variations or modifications that may be encompassed by the patents of the present invention. 201016377 [Brief Description of the Drawings] The drawings are perspective views of the first preferred embodiment of the present invention. The load bearing plain = the side view of the first preferred embodiment 'shows mainly: the state in which the first side is located at the second position. A partial enlarged view of the second diagram of the base, mainly showing the fixing member abutting the main display
第四圖為本發明第—錄實闕之側視圖， 承载平台之第-側邊位於第—位置之狀態。 第五®為本發明第—較佳實施例之另一側考 顯示該等支腳靠合基框之狀態。 第六圖為本發明第二較佳實關展_之立體圖。 圖為本發明第二較佳實施例之侧視圖，主要顯干 承载平台之第-側邊位於第二位置之狀態。要顯不 第八圖為本發明第二較佳實施例之側視圖，主要顯示 承載平台之第，邊位於第—位置之狀態。 …、 第九圖為本發明第二較佳實施例之另一侧視圖，主要 顯示該等支腳靠合基框之狀態。 【主要元件符號說明】 「第一實施例」 承載平台(20) 第二側邊(24) 固定件(223) 復位彈簧(223b) 支撐架(10) 第一側邊(22) 樞接部(221，241) 扳動端(223a) 201016377 第三側邊(26) 基框(30) 支撐部(304) 支撐桿(32，34) 卡合件(342) 344)第一樞接部(326，346) 滑套(36) 第一端部(372)The fourth figure is a side view of the first record of the present invention, and the first side of the carrying platform is in the state of the first position. The fifth test is the other side of the first preferred embodiment of the present invention to show the state of the legs against the base frame. The sixth figure is a perspective view of the second preferred embodiment of the present invention. The figure is a side view of a second preferred embodiment of the present invention, mainly showing the state in which the first side of the load carrying platform is in the second position. 8 is a side view of a second preferred embodiment of the present invention, mainly showing the first side of the carrying platform, and the side is in the state of the first position. The ninth figure is another side view of the second preferred embodiment of the present invention, mainly showing the state of the legs resting on the base frame. [Description of main component symbols] "First embodiment" Bearing platform (20) Second side (24) Fixing member (223) Return spring (223b) Support frame (10) First side (22) Pivot ( 221,241) Trigger end (223a) 201016377 Third side (26) Base frame (30) Support (304) Support rod (32, 34) Engagement (342) 344) First pivot (326) ,346) Sleeve (36) First end (372)
抵靠端(223 c) 第四侧邊(28) 握持部(302) 第一橫桿(306) 第一凸部(322) 第二樞接部(324 墊塊(35) 凹部(3 7) 第二端部(374) 支撐件(40) 滾輪(38) 支腳(40a，40b)Abutting end (223 c) Fourth side (28) Grip (302) First crossbar (306) First projection (322) Second pivot (324 Pad (35) Recess (3 7 ) Second end (374) Support (40) Roller (38) Feet (40a, 40b)
第二凸部(42) 彈性件(50) 第二實施例」 支撐架(70) 第一側邊(722) 固定件(74) 支撐桿(762) 第一凸部(766) 支腳(78) 驅動件(90) 第二橫桿(44) 連桿(60) 承載平台(72) 第二側邊(724) 基框(76) 卡合件(764) 第二枢接部(768) 連桿(80) 踏桿(92) 側桿(94) 12Second protrusion (42) Elastic member (50) Second embodiment" Support frame (70) First side (722) Fixing member (74) Support rod (762) First convex portion (766) Feet (78) Drive member (90) Second crossbar (44) Link (60) Carrier platform (72) Second side (724) Base frame (76) Engagement (764) Second pivot (768) Rod (80) Step (92) Side Rod (94) 12