512110 A7 ____B7 五、發明説明（1) 【發明所屬之技術領域】 (請先閲讀背面之注意事項再填寫本頁) 本發明，係有關搖臂可昇降移動及以任意高度可水平 轉動，並在前端具備車輛承載台爲了用以支持車輛。 【先前之技術】 被具備於搖臂之前端的車輛承載台，係藉由昇降機上 昇之車種使高度調整爲必要。 因此，在先前，係譬如如圖7所示，在設置於搖臂1 之前端的雌螺栓孔23，由車輛承載台2之下面將進行突出 之附雄螺栓的支持軸24螺入，並藉由螺栓送出操作用以可 調整車輛承載台2之高度。 【發明所欲解決之問題】 藉由螺栓送出操作用以可調整車輛承載台之高度的搖 臂，係藉由支持軸之長度決定車輛承載台之調整範圍。 經濟部智慧財產局員工消費合作社印製 可對應於昇降轉轍點高度不同之各種車輛，調整範圍 係大者爲較佳，若使支持軸變長，則在用以降低車輛承載 台時因爲使支持軸在搖臂下方進行大的突出，所以將搖臂 使支持軸下端在與地板進行接觸之前不使下降到更下方， 並用以昇高車輛承載台時也難以確保穩定性。 又，因爲螺栓送出式，所以對調整高度使轉動之次數 係很多，並因爲也有難以旋轉，所以作業費時。 尙有，將支持軸做爲內外二重之望遠鏡式構造，也被 設法在降下車輛承載台時使支持軸能被縮小，但操作性卻 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -4 - 512110 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明説明（2) 變差，而用以廢止螺栓並藉由使襯墊介在進行高度調整， 或用以準備高度不同之複數的支持軸放著，根據必要也可 考慮進行交換，但都使零件數增加，管理上也有問題。 【解決問題之手段】 本發明，係使車輛承載台之高度調整範圍大，可下降 到進行接觸地板爲止，穩定性，作業性皆優異之車輛維修 用昇降機之搖臂，其構成，係具備凸輪機構將搖臂及承載 台以X型平行連桿機構進行連結，用以阻止前述X型平行 連桿機構之收縮動作並將前述車輛承載台進行支持於任意 位置，及設有棘輪機構將搖臂及承載台以X型平行連桿機 構進行連結，用以阻止前述X型平行機構之收縮動作並將 前述車輛承載台進行支持於任意位置。 而且在前者之搖臂中，凸輪機構，係在X型平行機構 中使下端部在被樞著於搖桿之一方的連桿板設置轉動凸 輪，將該轉動凸輪之凸輪面，對搖臂可形成組合成可推壓 動作，並在凸輪面及在搖臂中與凸輪之擋接面至少其中一 方，實施止滑處理爲較佳。 又在後者之搖臂中，棘輪機構，係構成以：棘輪爪，在 X型平行連桿機構中沿著搖臂進行移動並設於他方的連桿 板之下端部；棘輪齒，將前述他方之連桿的下端部沿著搖 臂進行引導並與導軌進行配置成平行。 進而即使任何之搖臂，也在X型平行連桿，使其X型 平行連桿根據車輛承載台之自重用以賦予阻止進行收縮之 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁)512110 A7 ____B7 V. Description of the invention (1) [Technical field to which the invention belongs] (Please read the precautions on the back before filling out this page) The invention relates to a rocker that can be moved up and down and can be rotated horizontally at any height. A vehicle carrying platform is provided at the front end to support the vehicle. [Previous technology] The vehicle loading platform provided at the front end of the swing arm is necessary to adjust the height by the type of vehicle lifted by the elevator. Therefore, previously, for example, as shown in FIG. 7, a female bolt hole 23 provided at the front end of the rocker arm 1 is screwed into the support shaft 24 with a male bolt protruding from the underside of the vehicle loading platform 2, and the The bolt feeding operation is used to adjust the height of the vehicle loading platform 2. [Problems to be Solved by the Invention] The swing arm that can adjust the height of the vehicle bearing platform by the bolt sending operation determines the adjustment range of the vehicle bearing platform by the length of the support shaft. The Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs prints various vehicles that can correspond to different heights of the switch points. The larger the adjustment range is, the better the support axis is. The support shaft protrudes below the rocker arm, so the lower end of the rocker arm is not lowered before contacting the floor, and it is difficult to ensure stability when used to raise the vehicle loading platform. In addition, because of the bolt-out type, the number of times of turning the height is adjusted, and it is difficult to rotate, so the operation takes time. Yes, the support shaft is used as the inner and outer double telescope type structure. It has also been managed to reduce the support shaft when lowering the vehicle loading platform, but the operability is based on the Chinese National Standard (CNS) A4 specification (210X297). (Mm) -4-512110 Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (2) Deteriorated and used to abolish the bolts and adjust the height of the gasket by interposing it, or to prepare the height Different support shafts are placed, and exchanges can be considered if necessary, but they all increase the number of parts and have management problems. [Means for solving the problem] The present invention is a swing arm of a vehicle maintenance lift which has a wide range of height adjustment range of the vehicle bearing platform and can be lowered to the floor contact level, and has excellent stability and workability. The mechanism connects the rocker arm and the bearing platform with an X-type parallel link mechanism to prevent the contraction of the X-type parallel link mechanism and supports the vehicle bearing platform at an arbitrary position, and a ratchet mechanism is provided to swing the arm The loading platform is connected with an X-shaped parallel link mechanism to prevent the retracting action of the aforementioned X-shaped parallel mechanism and support the aforementioned vehicle loading platform at an arbitrary position. Moreover, in the former rocker arm, the cam mechanism is connected to the X-type parallel mechanism, and the lower end portion is provided with a rotation cam on a link plate pivoted to one of the rockers. The cam surface of the rotation cam can be used for the rocker arm. The combination is formed to be capable of pushing, and it is better to implement anti-slip processing on at least one of the cam surface and the contact surface with the cam in the rocker arm. In the latter swing arm, the ratchet mechanism is composed of: a ratchet claw, which moves along the swing arm in the X-type parallel link mechanism and is provided at the lower end of the other link plate; the ratchet teeth, The lower end portion of the connecting rod is guided along the rocker arm and is arranged parallel to the guide rail. Furthermore, even if any rocker arm is used, the X-type parallel link is used to give the X-type parallel link according to the weight of the vehicle bearing platform to prevent the shrinkage of the paper. The Chinese paper standard (CNS) A4 (210X297) Li) (Please read the notes on the back before filling in this page)
-5- 512110 A7 B7 五、發明説明（3) 彈簧力爲較佳。 【發明之實施形態】 將關於本發明之車輛維修用昇降機之搖臂根據圖式加 以說明。 圖1及圖2係皆顯示在第1實施例之搖臂的前端部 分，所以在搖臂1之前端，係使厚度比搖臂之其他部份略 爲一半，並使前半部分被形成寬窄之承載台安裝部la，在 該承載台安裝部1 a被組合有車輛承載台2。 車輛承載台2，係與前述承載台安裝部1 a形成對稱， 在基端側被形成寬窄部份之厚板狀的基座3上，通過座板4 並用以裝著橡膠墊5並被構成，在非寬窄部份之兩側係做 爲導軌被形成引導溝6。 又另外，在前述承載台安裝部1 a中在寬窄部分之兩側 也做爲導軌被形成引導溝7。 8、8，係使一對之連桿板9、10相互在中央進行交叉， 用以樞著使該交叉部分之中心並被構成之X型平行連肩機 構，兩側皆，一方之連桿板9，係使下端被樞著於承載台安 裝部la之側面，上端係對被形成於基座3之側面的引導溝 6，沿著該引導溝6並形成能自由擦動使每個滑塊被連結， 他方之連桿板10，係與前述之連桿板9形成對稱，使上端 被樞著於基板之側面，下端係對被形成於承載台安裝部la 之側面的引導溝7，沿著該引導溝7形成能自由擦動使滑塊 被連結。 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） • »·11=11= n " n In Is—…一一_iig 三三||-ιιιιιιιιιι a— (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 -6- 512110 A7 B7 五、發明説明（4) 而且在X型平行連桿機構8,係在連桿板9、10之交叉 部，在擴開側被安裝賦與彈簧力之扭力彈簧11。 又，在被配置於兩側之連桿板9、9之間，係在比中央 更下方位置使凸輪軸1 2將單端部對側方在使突出之狀態下 被架設，在該凸輪軸12，係在中央部分做爲轉動凸輪使使 用漸開曲線之凸輪（以下稱爲漸開凸輪）13與凸輪軸12被 安裝成可一體旋轉，而在該突出部之前端，係對旋鈕14及 凸輪軸12爲了賦予將凸輪在大徑側能進行轉動之力量被設 有扭力彈簧15。 而且在前述漸開凸輪13之凸輪面，係被形成做爲止滑 處理之細小凹凸起伏面。 又在承載台安裝面la之上面，係連設有凹部16及突部 17，在由凹部16之底到突部17之頂點爲止之區間，係被 形成爲與前述漸開凸輪1 3進行擋接之傾斜面1 8。 其次在如此被形成之搖臂中，用以說明車輛承載台之 高度調整例，昇高車輛承載台2之高度，係將基座3抬 起，則如圖3之（a ) 、（ b ) 、（ c )所示，X型平行連桿 機構8，係使各連桿板9、10之端部分別沿著引導溝6、7 進行移動同時進行追隨基座3之移動，藉由該X型平行連 桿機構8之運動使漸開凸輪1 3由傾斜面1 8進行分離，則 藉由扭力彈簧15之力也使該漸開凸輪13，使凸輪面能連接 於傾斜面1 8並進行轉動。 因此，在任何高度即使將手放開，則漸開凸輪13，係 使該齒輪面保持在進行壓接傾斜面18之卡止狀態。 本紙張尺度適用中國國家標準（CNS ) A4規格（21〇><297公釐） 4—, (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 512110 A7 _____B7 五、發明説明（5) (請先閲讀背面之注意事項再填寫本頁) 相反將車輛承載台下降時，用以轉動旋鈕14並將漸開 齒輪13之凸輪面由傾斜面18分離，在該狀態下若壓下基 座3與前述相反的動作則可降下車輛承載台，若由旋鈕！ 4 將手放開’則使漸開凸輪13進行壓接於傾斜面1 8，形成卡 止狀態。 如此被形成之搖臂’係將車輛承載台抬起，或用以操 作旋鈕以僅壓下之一次觸碰可調整高度，並藉由X型平行 連桿機構特有之構造，使車輛承載台之高度調整範圍大， 穩定性也高。 而且即使降下車輛承載台因爲對下方係無任何之突出 物，所以可將搖臂降下到最下位置爲止，並可對應於幾乎 所有的車種。 尙有，在該第1發明中，在凸輪面所實施之止滑處理 係進行變更成鋸齒或壓花加工，也可設置於傾斜面1 8。 經濟部智慧財產局員工消費合作社印製 又，在實施例係將漸開齒輪設置於連桿板，因爲形成 使凸輪面進行壓接於設置在車輛承載台安裝部之傾斜面的 構造，所以藉由合理的組合形成安裝容易，但將凸輪！傾 斜面相反配置，譬如穿過承載台安裝部之正中間並在該處 用以配置漸開齒輪，另外在架設於左右之X型平行連桿機 構間之受壓構件形成設置傾斜面之構成，車輛承載台及連 桿板之相互間，或在用以構成1個X型平行連桿機構之連 桿板相互間進行配置也無妨，轉動凸輪，係漸開凸輪以外 譬如使用旋輪曲線之凸輪等，可採用各種之轉動凸輪。 尙有，在實施例，係在車輛承載台安裝部la連設凹部 本紙張尺度適用中國國家標準（CNS ) A4規格(210X297公釐) ' 512110 A7 __B7_ 五、發明説明（6) 16及突部17,但不設置凹部16及突部17,在承載台安裝 部la之上面進行直接承受凸輪面也可。 (請先閲讀背面之注意事項再填寫本頁} 前述第1實施例係用以利用凸輪並使卡止功能能保 持，但用以利用棘輪機構也可獲得同樣的效果，因此其次 根據用以利用棘輪機構之第2實施例加以說明。 用以顯示第2實施例之圖4及圖5，也與前述第1實施 例相同表示搖臂之前端部份，在與前述第1實施例相同功 能之部份係用以使用與第1實施例所使用之符號的相同符 號。 該搖臂1係將前端之部份由本體內形成自由拉出之望 遠鏡狀的伸縮型式，在前端部份，係先使具有寬幅部之車 輛承載台安裝部la被設置，而在該承載台安裝部la，係通 過X型平行機構8並被組裝車輛承載台2。 關於前述車輛承載台2及X型平行機構8係因爲在實 施例1已經說明，詳細的說明係加以省略。 經濟部智慧財產局員工消費合作社印製 在X型平行連桿機構8，係使下端部沿著搖臂1進行移 動並在他方的連桿板10、10之下端部間，使轉動軸19，在 使其端部突出於兩側之狀態下被架設，而在該轉動軸19中 之一方的突出端部，係被安裝有棘輪爪20,又在他方之突 出端部被安裝有旋鈕21。 另外，在承載台安裝部la之一方的側面，係與引導溝 7成平行，藉由與前述棘輪爪20之嚙合以一體被設置用以 阻止X型平行機構之擴開的棘輪齒22，在前述轉動軸19， 係在使棘輪爪20與棘輪齒22能進行嚙合之方向被賦予彈 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -9- ^21l〇 A 7 〜--〜_B? __ 五、發明説明（7) 簧力。 在如此被構成之搖臂中，用以說明車輛承載台之高度 的調整例，則在上昇車輛承載台2之高度，係抬起基座3 , 則在X型平行連桿機構8中他方之連桿板1〇，係使棘輪爪 在各一齒越過棘輪齒22之方向進行運動，可將車輛承載 台2以圖6之（a) 、（b) 、（c)之順序昇高，達到希望 之高度後由基座3只要將手放開則形成卡止狀態。 相反要降下車輛承載台2時，係在圖6之（b)加以舉 例，用以旋轉旋鈕21並將棘輪機構之嚙合若加以解除，則 基座3係形成可壓下，與前述係可相反的順序下降，由旋 鈕：21若將手放開，則使棘輪爪20與棘輪齒22被嚙合。 如此被形成之搖臂，係將車輛承載台抬起，或用以操 作旋鈕並在只壓下之一次觸碰的操作可調整高度，被發揮 與前述第1實施例相同的效果。 本實施例之棘輪機構，其構成係以：棘輪爪20，安裝於 連桿板10之下端；棘輪齒22，在承載台安裝部la與引導溝 7進行配置成平行；但其構成也可以：棘輪齒，軸安裝於用以 樞著連桿板之樞著軸，又設置於連桿板之最端部；棘輪爪， 設置於使其連桿板被樞著之基座或承載台安裝部之側面。 尙有，在本實施例係使棘輪齒（包含棘輪爪）只被設 置於承載台安裝部之一側，但設置於兩側可提高信賴性， 又任何之實施例，可採用手把或桿代替旋鈕。 本發明之搖臂，係將X型平行機構之優點發揮最大限 度，同時藉由凸輪或棘輪機構的有效利用，將車輛承載台 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐) ' ' -10- 嚓！ (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 512110 A7 B7______ 五、發明説明（8) 在一次觸碰形成可調整做爲主要的目的，用以變更承載台 安裝部之形狀，將X型平行連桿機構使樞著側及滑塊連結 側進行組合形成前後相反等，在可達成本發明之前述目的 的範圍內進行適宜變更也無妨。 【發明之效果】 若依據本發明，則以堅固並使穩定性良好，昇降臂之 下降高度無被限制，比任何操作性更良好，並可迅速調整 高度。 而且將設置於一方之連桿板的轉動凸輪之凸輪面，對 搖臂組合成可推壓動作之構造，或，在X型平行機構沿著 搖臂進行移動將設置於他方的連桿板之下端部的棘輪爪， 因爲形成將前述他方之連桿之下端沿著搖臂進行引導並與 導軌配置成平行之棘輪齒進行嚙合的構造，所以藉由合理 的配置可容易進行組合，凸輪面及與其凸輪面之擋接面若 都實施止滑處理，則可確保高摩擦力，使卡止時之信賴性 增力口。 【圖式之簡單說明】 圖1係顯示有關本發明之第1實施例的搖臂之斜視 圖。 圖2係顯示有關本發明之第1實施例的搖臂之說明 圖。. 圖3係顯示有關本發明之第1實施例中搖臂之動作說 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 一 -11 - ί---S-------- (請先閲讀背面之注意事項再填寫本頁) 1Τ 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明説明（9) 明ϋ。 圖4係顯示有關本發明之第2實施例的搖臂之斜視 圖。 圖5係顯示有關本發明之第2實施例的搖臂之說明 圖6係顯示有關本發明之第2實施例中搖臂之動作說 明圖。 圖7係先前例之說明圖。 $件編號之說明】 1…搖臂， la…承載台安裝部， 2…車輛承載台 5…橡膠墊， 6、7…引導溝， 9、10…連桿板， 11…扭力彈 13…漸開凸輪， 14…旋鈕， 凹部， 17…突部， 18…傾斜 20…棘輪爪， 21…旋鈕， n ΙΓ · m m m mi ml m (請先閲讀背面之注意事項再填寫本頁} 3 ···基座， 4…座板 8…X型平行連桿機構 簧’ 1 2…凸輪軸， H···扭力彈簧， 16· 面， 19…轉動軸， 訂 經 濟 部 智 慧 財 產 局 消 費 合 作 社 印 製 22···棘輪齒 軸0 23…雌螺栓孔 24…附雄螺栓之支持 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -12--5- 512110 A7 B7 V. Description of the invention (3) The spring force is better. [Embodiment of the invention] The rocker arm of the vehicle maintenance elevator of the present invention will be described with reference to the drawings. 1 and 2 are shown at the front end portion of the rocker arm of the first embodiment, so at the front end of the rocker arm 1, the thickness is slightly half than that of other parts of the rocker arm, and the front half is formed to be wide and narrow. The stage mounting portion la is a vehicle stage 2 combined with the stage mounting portion 1 a. The vehicle loading platform 2 is symmetrical to the aforementioned loading platform mounting portion 1 a, and a thick plate-shaped base 3 having a wide and narrow portion formed on the base end side is passed through the seat plate 4 and is provided with a rubber pad 5 and configured. Guide grooves 6 are formed as guide rails on both sides of the non-wide and narrow portions. In addition, in the aforementioned mount mounting portion 1a, guide grooves 7 are formed as guide rails on both sides of the wide and narrow portions. 8, 8 is a pair of connecting rod plates 9, 10 crossing each other in the center, used to pivot the center of the intersection and is constituted by X-shaped parallel shoulder mechanism, on both sides, one link The plate 9 is such that the lower end is pivoted to the side surface of the mounting platform mounting portion la, and the upper end faces the guide groove 6 formed on the side surface of the base 3, and along this guide groove 6 are formed to be freely wiped to make each slide The blocks are connected, and the other link plate 10 is symmetrical with the aforementioned link plate 9 so that the upper end is pivoted on the side of the base plate and the lower end is opposite to the guide groove 7 formed on the side of the mounting platform mounting portion la. Free sliding is formed along the guide groove 7 to connect the slider. This paper size applies to China National Standard (CNS) Α4 specification (210X297 mm) • »· 11 = 11 = n " n In Is—… 一一 _iig 三 三 || --ιιιιιιιιιιι a— (Please read the Please fill in this page again.) Order printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives. -6-512110 A7 B7 V. Description of the invention (4) And the X-type parallel link mechanism 8 is connected to the link plates 9, 10 A torsion spring 11 that imparts a spring force is mounted on the intersecting portion on the expanded side. In addition, the camshafts 12 are placed between the link plates 9 and 9 disposed on both sides at a position lower than the center, and the single end is projected on the side opposite to the camshaft. 12. The central part is used as a rotating cam so that a cam using an involute curve (hereinafter referred to as an involute cam) 13 and the camshaft 12 are installed to rotate integrally. At the front end of the protrusion, the knob 14 and The camshaft 12 is provided with a torsion spring 15 in order to impart a force capable of rotating the cam on the large-diameter side. In addition, the cam surface of the involute cam 13 is formed as a fine uneven surface with a smooth finish. In addition, a recess 16 and a protrusion 17 are connected to the mounting surface la of the loading platform. The interval from the bottom of the recess 16 to the apex of the protrusion 17 is formed to block the involute cam 13 described above. Next to the inclined surface 1 8. Secondly, in the thus formed rocker arm, it is used to explain the height adjustment example of the vehicle bearing platform. To raise the height of the vehicle bearing platform 2 is to raise the base 3, as shown in (a) and (b) of FIG. 3 As shown in (c), the X-type parallel link mechanism 8 moves the ends of each link plate 9 and 10 along the guide grooves 6 and 7 and simultaneously follows the movement of the base 3, and the X The movement of the type parallel link mechanism 8 causes the involute cam 13 to be separated by the inclined surface 18, and the involute cam 13 is also caused by the force of the torsion spring 15 so that the cam surface can be connected to the inclined surface 18 and rotated. . Therefore, even if the hand is released at any height, the cam 13 is gradually opened so that the gear surface is kept in the locked state in which the inclined surface 18 is pressed. This paper size applies the Chinese National Standard (CNS) A4 specification (21〇 > < 297mm) 4—, (Please read the precautions on the back before filling this page) Order printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives 512110 A7 _____B7 V. Description of the invention (5) (Please read the precautions on the back before filling this page) Conversely, when lowering the vehicle loading platform, turn the knob 14 and separate the cam surface of the involute gear 13 from the inclined surface 18 In this state, if the base 3 is pressed in the opposite action to that described above, the vehicle loading platform can be lowered. 4 Letting go of the hand 'causes the involute cam 13 to be crimped to the inclined surface 18 to form a locked state. The rocker arm thus formed is used to lift the vehicle bearing platform, or to operate the knob to adjust the height with only one touch of depression, and the unique structure of the X-type parallel link mechanism makes the vehicle bearing platform Wide height adjustment range and high stability. In addition, even if the vehicle platform is lowered, the swing arm can be lowered to the lowest position because it does not have any protrusions below, and it can correspond to almost all types of vehicles. In addition, in the first invention, the anti-slip processing performed on the cam surface is changed to sawtooth or embossing, and it may be provided on the inclined surface 18. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. In the embodiment, the involute gear is provided on the connecting rod plate. Since the cam surface is crimped to the inclined surface provided on the mounting portion of the vehicle loading platform, Formed by a reasonable combination is easy to install, but will cam! The inclined surface is arranged oppositely, for example, it passes through the middle of the mounting part of the loading platform and is used to arrange an involute gear there. In addition, the inclined member formed between the left and right X-shaped parallel link mechanisms is formed with an inclined surface. It is also possible to arrange the vehicle bearing platform and the link plate with each other, or arrange the link plates with each other to form an X-shaped parallel link mechanism. Rotating the cam is other than the involute cam, such as a cam using a spiral curve. Various rotary cams can be used. Yes, in the embodiment, the recessed part is connected to the mounting part la of the vehicle loading platform. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) '512110 A7 __B7_ V. Description of the invention (6) 16 and the protrusion 17, but the recessed portion 16 and the protruding portion 17 are not provided, and the cam surface may be directly received on the upper surface of the mounting platform mounting portion la. (Please read the precautions on the back before filling in this page} The first embodiment is to use the cam and keep the locking function, but the same effect can be obtained by using the ratchet mechanism. The second embodiment of the ratchet mechanism will be described. Figs. 4 and 5 for showing the second embodiment are also the same as the first embodiment, and show the front end portion of the rocker arm, which has the same function as the first embodiment. The part is used to use the same symbol as that used in the first embodiment. The rocker arm 1 is a telescopic telescopic type that freely pulls out the front part from the body. A vehicle mounting platform mounting portion la having a wide portion is provided, and the vehicle mounting platform 2 is assembled to the vehicle mounting platform 2 through the X-type parallel mechanism 8. The vehicle mounting platform 2 and the X-type parallel mechanism 8 are assembled. The detailed description is omitted because it has been described in the first embodiment. The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is printed on the X-shaped parallel link mechanism 8 so that the lower end portion moves along the swing arm 1 and moves elsewhere. Between the lower ends of the link plates 10 and 10, the rotating shaft 19 is erected with its ends protruding to both sides, and one of the protruding ends of the rotating shaft 19 is provided with a ratchet. The claw 20 is also provided with a knob 21 at the protruding end of the other side. In addition, the side of one of the mounting table mounting portions la is parallel to the guide groove 7 and is integrally provided by meshing with the ratchet claw 20 described above. The ratchet teeth 22 used to prevent the X-type parallel mechanism from expanding are arranged on the rotating shaft 19 in a direction so that the ratchet claws 20 and the ratchet teeth 22 can mesh with each other. The paper size is applied to the Chinese National Standard (CNS). A4 specification (210X297 mm) -9- ^ 21l〇A 7 ~~~ _B? __ V. Description of the invention (7) Spring force. In the swing arm thus constructed, it is used to explain the height of the vehicle bearing platform. In the adjustment example, when the height of the vehicle loading platform 2 is raised, and the base 3 is raised, the other link plate 10 in the X-shaped parallel link mechanism 8 is used to make the ratchet claws pass over the ratchet teeth 22 at each tooth. The vehicle carrying platform 2 can be moved in the direction of (a), (b), (c) in FIG. 6 After reaching the desired height, the base 3 will be locked as long as the hand is released. On the contrary, when the vehicle loading platform 2 is lowered, an example is shown in (b) of FIG. 6 for rotating the knob 21 and turning the ratchet wheel. If the meshing of the mechanism is released, the base 3 can be pressed down, and can be lowered in the reverse order of the previous system. If the hand is released by the knob: 21, the ratchet pawl 20 and the ratchet teeth 22 are engaged. The formed swing arm is used to raise the vehicle loading platform, or to adjust the height by operating the knob and pressing it with only one touch. The same effect as that of the first embodiment is exerted. The mechanism is composed of a ratchet claw 20 installed at the lower end of the link plate 10, and a ratchet tooth 22 arranged parallel to the guide groove 7 at the mounting platform mounting portion la; but it may also be constituted by a ratchet tooth and a shaft A pivot shaft for pivoting the link plate is provided at the extreme end of the link plate; a ratchet pawl is provided on the side of the base or the mounting platform mounting portion where the link plate is pivoted. However, in this embodiment, the ratchet teeth (including ratchet claws) are provided only on one side of the mounting portion of the supporting platform, but the reliability is improved by being provided on both sides. In any embodiment, a handle or a lever may be used. Instead of a knob. The swing arm of the present invention maximizes the advantages of the X-type parallel mechanism, and at the same time, the effective use of the cam or ratchet mechanism makes the paper size of the vehicle bearing platform applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) ' '-10- Alas! (Please read the precautions on the back before filling out this page) Order printed by the Intellectual Property Bureau of the Ministry of Economic Affairs's Consumer Cooperatives 512110 A7 B7______ V. Description of the invention (8) Adjustable in the form of a single touch as the main purpose for change The shape of the mounting platform mounting portion is formed by combining the X-shaped parallel link mechanism with the pivot side and the slider connecting side to form the opposite side, etc., and it is possible to change it appropriately within the range that can achieve the aforementioned purpose of the present invention. [Effects of the Invention] According to the present invention, the height of the lowering arm is not limited due to its sturdiness and good stability, and it has better operability than any other, and the height can be adjusted quickly. Furthermore, the cam surface of the rotating cam provided on one of the link plates is combined with a rocker arm to be capable of being pushed, or the X-type parallel mechanism is moved along the rocker arm, and the link plate on the other link plate is provided. The ratchet claws at the lower end are configured to guide the lower end of the other connecting rod along the rocker arm and mesh with the ratchet teeth arranged in parallel with the guide rail. Therefore, they can be easily combined by a reasonable configuration. If anti-slip treatment is applied to the contact surface of the cam surface, high friction force can be ensured and the reliability can be increased during locking. [Brief description of the drawings] Fig. 1 is a perspective view showing a rocker arm according to a first embodiment of the present invention. Fig. 2 is an explanatory view showing a rocker arm according to the first embodiment of the present invention. Figure 3 shows the operation of the rocker arm in the first embodiment of the present invention. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm). -11-ί --- S ----- --- (Please read the notes on the back before filling out this page) 1T Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (9) Note. Fig. 4 is a perspective view showing a rocker arm according to a second embodiment of the present invention. Fig. 5 is a diagram showing a rocker arm according to a second embodiment of the present invention. Fig. 6 is a diagram showing the rocker arm operation according to a second embodiment of the present invention. FIG. 7 is an explanatory diagram of the previous example. Description of the item number] 1 ... rocker arm, la ... loading platform mounting section, 2 ... vehicle loading platform 5 ... rubber pad, 6, 7 ... guide groove, 9, 10 ... link plate, 11 ... torsion spring 13 ... gradually Open cam, 14 ... knob, recess, 17 ... protrusion, 18 ... tilt 20 ... ratchet claw, 21 ... knob, n ΙΓ · mmm mi ml m (Please read the precautions on the back before filling in this page} 3 ··· Base, 4 ... seat plate 8 ... X type parallel link mechanism spring '1 2 ... camshaft, H ... torsion spring, 16 surface, 19 ... rotation shaft, ordered by the Consumer Property Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 22 ··· Ratchet gear shaft 0 23… Female bolt hole 24… with support of male bolts The paper size is applicable to China National Standard (CNS) A4 (210X297 mm) -12-