1325463 九、發明說明： 【發明所屬之技術領域】 而舌之，尤指一種電動升 馬達驅動升降的門扇（如： 無法電控操作門扇上升時 本發明係與電動升降門有關，詳 降門之安全逃生裝置，其係針對利用 鐵捲門、車庫門）在遇到危急且斷電， 的緊急逃生裝置。 【先前技術】 升降式啟_門扇大量地安裝在店鋪、車料場合，並使 用升降式Η扇保護門戶安全，為提高門扇升降的方便性，此類 升降式《多以馬相料降，而在馬達需要電力供應始能運 轉驅動門扇升降的情形下，—旦W電力供應，馬達無法運轉 也就無法驅使Η扇升降，尤其是火災、地震等意外發生時，供 電系統往往失去仙，此時，無法開啟上升的升降門反將形成 人員逃生的阻礙。 為解決電動升降門在無電力的供應時將產生無法逃生的問 題’遂有人提出針對電動升降門在失去動力時，依然能有最後 一次將門扇拉起的發明；本國專利公告Μ261585號專利，揭露 一種「鐵捲門斷電手控捲動構造」，其主要係在無電力狀態下， 可藉由手動切換機構將切換為手控模式，利用手動操作手動捲 輪即可連動齒輪組促使鐵捲門升降，然而一般在火災、地震等 事故發生時，每一秒都將會是生死關頭，因此轉換為手動操作 拉起鐵捲門，往往有緩不濟急之弊。 1325463 本國專利公告553309滅專利’揭露一種「安全逃生電動鐵 捲門結構改良」’其主要係利用彈簧儲存驅動鐵捲門上升所需能 量，在緊急的情況下，啟動安全裝置即可捲動鐵捲門上升若干 高度，使得鐵捲門下方形成一個可以逃生的出口，但由於受到 彈簧的作動行程限制，鐵捲門上升的高度有限，使得所形成的 逃生出口很小，不方便逃生，且在啟動安全裝置的瞬間，由於 彈簧作用力的瞬間釋放，使得鐵捲門會以暴衝的方式拉起’若 此時有人員緊鄰在鐵捲門旁，容易形成安全上的疑慮，另外， 就此習知技術而言，彈簧所提供的彈性作用力，必需要大於鐵 捲門自重及鐵捲Η作動時的摩擦阻力，始能有效地拉升鐵捲門 發揮作用’如此—來’在正常狀態下，鐵捲門放下致使彈菩受 屋縮時’為克服彈簧的作用力，馬達必需保持對鐵捲門輸出相 虽的扭力，否則，鐵捲門將無預警地受彈簧作用而自動上升， 不但造成平日使用的耗電量高，且彈簧長期受壓迫變形，容易 產生彈性疲乏現象’反使得需要彈簀發揮作料，其彈力無法 有效驅使鐵捲門上升，可靠度不足。 是故，針對上述缺弊，本案發明人遂積極進行研究發明， 經多方試驗後終得創新且可供產業❹之本發明者。 【發明内容】 本發明主要目的在於提供—種電動升降門之安全逃生 置，其藉由配重塊在高、低位差之間的位能、動能轉換利 1325463 重力驅使升降門作動，俾供提高使用安全性及可靠度者。 本發明係—種f動升降門之安全逃生裝置，主要包含： -螺桿’該螺桿橫向樞設於電動升降門頂部空間處，該螺 桿並藉一傳動輪組與升降門之主抽雙向連動者，該螺桿並螺套 一引導元件； -導執，該導軌與該螺桿平行而設，該料元件與該導執 相鄰，且該導軌賴料元件形餘對限制，俾供該引導元件 沿該導軌軸向往復位移者； 一捲收器，該捲收器與該引導元件相接； —配重塊，該配重塊吊設於—繫索—端，該繫索另—端繞 經一滑輪轉向與該捲收器相接，並藉該捲㈣捲繞㈣” 索，俾供該繫索保持端張狀態，並使該弓I導元件與該配重塊相 互牵引作動者；及 一定位器’該定位器具有一啟動桿、一抵擎桿，其中，該 抵擎桿底端與該啟動桿樞接’該抵掣桿頂端斜向延伸抵擎該配 重塊底緣，據以支持定㈣g&重塊於高處，俾供儲備摯動升 門開啟之位能者； 據此，藉由解除該定位器對該配重塊的支持作用，使1配 重塊下^並拉引該引導元件位移，即連動該螺桿旋轉，進^ 動升降門之主軸旋轉，俾供開啟升降門者。 為使本發明之技術手段及其所達成之目的、. ^ 刀效，得以更 進/地,月邊顯現，兹舉較佳可行的具體實施例並配合圖式詳 述於后。 【實施方式】 請參閱圖一’本發明電動升降門之安全逃生裝置較佳實施 例’主要包含-螺桿（23)、一傳動輪組、一導軌（21)、一配重 塊（31)、一定位器（5)及一捲收器（4)所構成。 升降門組，料降門⑴）之開啟與關係受馬達（⑵控 制’其升降Η (11)之-㈣再設有從動輪（13)，使該從動輪⑽ 與後述之主動輪（24)聯結後能受轉動，該升降門（11)係設置於 主軸（14)上，並受馬達⑽連接帶動，且該升降門⑴）其主轴 (14)一側分別设有一軸承（15)，該軸承（15)用以支撐與轉動該 主軸（14); 一線性移動組（2)，其包括有導軌（21)、引導元件（22)、螺 桿（23)、及主動輪（24)，該引導元件（22)係延導軌（21)移動， 該引導元件（22)係螺套於螺桿（23)上，而該主動輪（24)與該螺 桿（23)固接，當引導元件（22)受後述之配重塊（31)牵引移動 時，能經由引導元件（22)使螺桿（23)做旋轉運動，以使主動輪 (24)轉動從動輪（13)，進而轉動升降門（π)，並帶動升降門（丨丄） 開啟。 .一儲能釋放裝置’包括有：配重塊（31)，係提供一重量， 以經由後述之繫索（32)帶動引導元件（22);捲收器（4)，係設置 1325463 於後述之引導元件（22)上，以捲收與釋放後述之繫索（32);繫 索（32)，其一端係與捲收器（4)連接，而另一端則與配重塊（31) 連接；定位器（5)，係提供支撐與釋放配重塊（31)。 其中，該螺桿（23)橫向樞設於電動升降門頂部空間處，其 兩端分別藉軸承（15)與升降門樞接，該螺桿（23)—端藉該主動 輪（24)與升降門之主軸（14)連動，據使該主軸（14)受馬達（12) 驅動旋轉，進而捲動升降門（11)啟閉時，得以連動該螺桿（23) 旋轉，該從動輪（13)與該主動輪（24)係由一迴圈狀之傳動元件 (6)所組成，其中，該傳動元件（6)圈套該從動輪（13)與該主動 輪（24)，俾供該螺桿（23)與該主軸（14)彼此雙向連動者；該導 執（21)與該螺桿（23)平行而設，該螺桿（23)螺套一引導元件 (22)，該引導元件（22)與該導軌（21)兩側相鄰，以藉由該導轨 (21)對該引導元件（22)形成相對限制，使該引導元件（22)無法 隨同該螺桿（23)旋轉，俾供該引導元件（22)沿該導軌（21)軸向 往復位移者；該捲收器（4)與該引導元件（22)相接。 該配重塊（31)藉由一繫索（32)吊設於電動升降門一側，該 繫索（32)繞經一滑輪（33)之輪緣轉向與該捲收器（4)相接，並藉 該捲收器（4)捲繞收取該繫索（32)，使該繫索（32)得以保持繃張 狀態，據此，該引導元件（22)與該配重塊（31)彼此得以相互牽 引作動，該定位器（5)具有一啟動桿（51)、一抵摯桿（52)及一承 托塊（53)，其中，該啟動桿（51)及該承托塊（53)固設於配重塊 1325463 (31)位移路徑外，該抵掣桿（52)底端與該啟動样（51)樞接，該 抵f桿（52)斜向搭靠於該承托塊（53)頂緣，據伏該牴擎桿（52) 頂端斜向延伸抵掣該配重塊（31)底緣，並藉該承托塊（53)對該 抵掣桿（52)形成支持，據此定位該配重塊（31)於高處，俾供儲 備摯動該升降門（11)上升開啟之位能者；另，該啟動桿（51)與 該抵掣桿（52)間設有扭力彈簧（54)(如圖二所示），據使抵掣桿 (52)常態保持對該配重塊（31)形成抵掣狀態者。 請參閱圖三、圖四，該捲收器（4)係由一盒體（41)、一中軸 (42)、一捲盤（43)及一蝸捲彈簧（44)所組成，其中，該盒體（41) 於周壁貫穿一過孔（411)，使該繫索（32)得以通過該過孔（411) 進入該盒體（41)内部，該中軸（42)立設於該盒體（41)内，且該 中軸（42)兩端分別與該盒體（41)頂、底端樞接，該捲盤（43)與 該中軸（42)轴接，該繫索（32)末端與該捲盤相接，藉由該中軸 (42)與該捲盤（43)連動旋轉，而得以配合該引導元件（22)之位 移收、放該繫索（32)，俾供該繫索（32)保持繃張狀態者；請配 合參閱圖五，該盒體（41)内部於鄰近外緣處設有一固定銷 (412)，該蝸捲彈簧（44)外端與該固定銷（412)鉤接，其内端與 該中軸（42)相接，據此，當該中軸（42)旋轉’即連動該蝸捲彈 簧（44)彈性變形，進而利用該蝸捲彈簧（44)提供彈性作用力驅 使該中軸（42)旋轉，俾供捲收該繫索（32)者。 裝設有本發明第-實施例之電動升降門，於該馬達（⑵啟 1325463 動驅使該主軸（14)旋轉下放該升降門（11)關閉門戶時，該主轴 (14)通過該從動輪（13)驅使該螺桿（23)旋轉，則該引導元件（22) 位移並拉引s亥配重塊（31)上升至高處，此時，藉由該定位5|(5) 對§玄配重塊（31)形成抵掣’即可將該配重塊（31)定位於高處而 不下落（如圖一所示狀態），當該馬達（12)反向驅使該主軸（14) 旋轉捲收該升降門（11)開啟門戶時，該螺桿（23)反向旋轉，則 5玄引導元件（2 2 )反向位移’此時，該配重塊（31)受到該定位 (.5)之抵掣，仍停留於高處並不下落，該捲收器（4)即可將一部 份之該繫索（32)捲收，使該繫索（32)於該引導元件（22)與該配 重塊（31)間仍保持編張狀態，故而，本發明藉由該定位器（5)使 該配重塊（31)得以留置於高處，除了第一次關閉時，該馬達（丨2 ) 必需耗費電能將該配重塊（31)拉升至高處外，在平日一般情形 下，電動升降門的運作，並不需要耗費電能支持該配重塊（31：^ 當該升降門（11)下放關閉門戶後，若遇到緊急事件，且電 力供應中斷，無法利用該馬達（12)提供動力開啟門戶時，使用 者扳動該抵掣桿（52)解除對該配重塊（31)的支撐’該配重塊（31) 遂由於自身重量作用而下落，當該配重塊（31)由高處下落時， 其位能遂轉換為動能，並透過該繫索（32)拉引該引導元件（22) 位移，該引導元件（22)位移即可連動該螺桿（23)旋轉進而通 過從動輪（13)與主動輪（24)驅使該主軸（14)旋轉而捲收該升降 門（11)，達到開啟門戶向外逃生之目的，而由於該配重塊（31) 12 1325463 下落叫·，其下落速度係由低速逐漸加速，故該升降門（ii)的捲 收並不會如習知技術一般，發生暴衝現象，使用安全性高，且 ' 由於該配重塊（31)係藉重力作用下落驅使升降門作動，即便經 < 過長期使用，仍然反覆作動，可靠度高。 再者，前述較佳實施例之傳動輪組，亦可將鍊輪、傳動元 件分別置換為皮帶輪、皮帶，亦可將鍊輪、傳動元件構成的傳 • 動輪組置換為齒輪所構成的傳動構造，舉凡此等置換，對於熟 習相關技術人士而言’乃為可輕易想見之變化，並未脫離本發 明之範疇。 綜前所述，本發明藉由首創之構成，而得以充份滿足預期 目的且功效卓著’申凊前又未見有相同、近似者公知在先，誠 符合發明專利之要件，爰依法提出申請。 【圖式簡單說明】 圖一係本發明較佳實施例之剖視示意圖。 • 圖二係本發明較佳實施例扭力彈簧之平面圖。 圖二係本發明較佳實施例捲收器之左側視圖。 圖四係本發明較佳實施例捲收器之軸向剖視圖。 圖五係本發明較佳實施例蝸捲彈簧之俯視圖。 【主要元件符號說明】 11升降門 12馬達 13 1325463 從動輪 主軸 軸承 線性移動組 導軌 引導元件 螺桿 主動輪 配重塊 繫索 滑輪 捲收器 盒體 過孔 固定銷 中軸 捲盤 蝸捲彈簧 定位ι§ 啟動桿 抵摯桿 1325463 5 3承托塊 54扭力彈簧 6傳動元件1325463 IX. Description of the invention: [Technical field to which the invention pertains] The tongue, in particular, a door fan that is driven by an electric hoist motor (for example, the invention is related to the electric lift gate when the door leaf is not lifted electronically, and the door is lowered. The safety escape device is an emergency escape device that is used in the event of a critical and power failure using an iron roll door or a garage door. [Prior Art] The lift type _ door fan is installed in a large number of shops and car materials, and the lift fan is used to protect the safety of the door. In order to improve the convenience of the door lift, the lift type is more than a horse. In the case that the motor needs electric power supply and can start to drive and drive the door fan to lift and lower, if the power supply of the motor is unable to drive the motor, the fan cannot be driven to lift, especially when a fire or an earthquake occurs, the power supply system often loses the fairy. The inability to open the rising lift gate will form a hindrance to the escape of personnel. In order to solve the problem that the electric liftgate can not escape when there is no power supply, 'I have proposed that the electric liftgate can still have the last invention to pull the door leaf when the power is lost; the national patent notice Μ 261585 patent discloses A kind of "iron-rolled door power-off hand-controlled scrolling structure", which is mainly in the state of no power, can be switched to the manual mode by manual switching mechanism, and the manual gear reel can be used to interlock the gear set to promote the iron coil Door lifts, however, in the event of an accident such as a fire or an earthquake, every second will be a matter of life and death, so switching to manual operation to pull up the iron roll door often has the disadvantage of being unsatisfactory. 1325463 National Patent Announcement 553309 Extinguish the patent 'Exposing a "Safety Escape Electric Iron Roll Door Structure Improvement" 'It mainly uses spring storage to drive the energy required to lift the iron roll door. In an emergency, the safety device can be started to scroll the iron. The roll door rises to a certain height, so that an exit can be formed under the iron roll door, but due to the action of the spring, the height of the roll door is limited, so that the escape exit is small, and it is inconvenient to escape. At the moment when the safety device is activated, due to the instantaneous release of the spring force, the iron roller door will be pulled up in a violent manner. If there is a person next to the iron roll door, it is easy to form a safety concern. In terms of technology, the elastic force provided by the spring must be greater than the self-weight of the iron roll door and the frictional resistance of the iron coil when it is actuated. It can effectively pull up the iron roll door to function [so-like] under normal conditions. When the iron roll door is lowered and the bomb is shriveled, the motor must maintain the torque of the output of the iron roll door to overcome the force of the spring. Otherwise, the iron roller door will automatically rise without warning, and it will not only cause high power consumption on weekdays, but also the spring will be deformed by compression for a long time. It is easy to produce elastic fatigue phenomenon, which makes it necessary to use the magazine to play the material, and its elastic force cannot be effective. Drive the iron roll door up and the reliability is insufficient. Therefore, in response to the above-mentioned shortcomings, the inventor of this case actively carried out research and invention, and after many trials, he was innovated and available to the inventors of the industry. SUMMARY OF THE INVENTION The main object of the present invention is to provide a safe escape device for an electric lift door, which is driven by the weight energy between the high and low position of the weight block and the kinetic energy conversion 1325463 to drive the lift gate to be actuated. Use safety and reliability. The invention relates to a safety escape device for a f-moving lifting door, which mainly comprises: - a screw 'the screw is laterally pivoted at the head space of the electric lifting door, and the screw is borrowed by a driving wheel set and the main lifting device of the lifting door a screw-threaded-leading member; - a guide, the guide rail is disposed in parallel with the screw, the material member is adjacent to the guide, and the guide rail-receiving member has a shape-to-restriction The guide rail is axially reciprocatingly displaced; a retractor, the retractor is connected to the guiding element; a counterweight, the counterweight is hung on the lanyard end, and the lanyard is further connected at the end a pulley is steered to the retractor, and the coil (4) is wound by the coil (4), and the lanyard is held in an end state, and the bow guide member and the counterweight are mutually towed; and a positioner 'the positioner has a starting rod, an abutting rod, wherein the bottom end of the abutting rod is pivotally connected with the starting rod. The top end of the abutting rod extends obliquely to the bottom edge of the weighting block. Support for (4) g & heavy weights in the high places, for the reserve to move the door to open the position; Therefore, by releasing the support function of the locator for the weight, the 1 weight is lowered and the displacement of the guiding element is pulled, that is, the screw is rotated, and the spindle of the lifting door is rotated, and the yoke is opened. In order to make the technical means of the present invention and the object achieved thereby, the effect of the knife is further improved, the moon is displayed, and the preferred embodiment is described in detail with reference to the drawings. [Embodiment] Please refer to FIG. 1 'The preferred embodiment of the safety escape device for the electric lift door of the present invention' mainly includes a screw (23), a transmission wheel set, a guide rail (21), and a weight (31). , a positioner (5) and a retractor (4). The opening and closing of the lifting door group, the material drop door (1)) is controlled by the motor ((2) control 'the lifting Η (11) - (four) then from The moving wheel (13) can be rotated after the driven wheel (10) is coupled with a driving wheel (24), which is disposed on the main shaft (14) and driven by the motor (10), and the lifting door is connected (1)) A bearing (15) is respectively arranged on one side of the main shaft (14), and the bearing (15) is used for supporting and rotating the main (14); a linear movement group (2) comprising a guide rail (21), a guiding member (22), a screw (23), and a driving wheel (24), the guiding member (22) extending the guide rail (21) Moving, the guiding element (22) is screwed onto the screw (23), and the driving wheel (24) is fixed to the screw (23), and when the guiding element (22) is pulled by the weight (31) to be described later When moving, the screw (23) can be rotated by the guiding member (22) to rotate the driving wheel (24) to the driven wheel (13), thereby rotating the lifting door (π), and driving the lifting door (丨丄) to open. An energy storage release device includes: a weight (31) for providing a weight to drive the guiding member (22) via a lanyard (32) to be described later; and a retractor (4) for setting 1325463 On the guiding member (22) to be described later, the lanyard (32) to be described later is wound up and released; the lanyard (32) has one end connected to the retractor (4) and the other end connected to the weight (31). The connection; the positioner (5) provides support and release of the weight (31). Wherein, the screw (23) is laterally pivoted at the head space of the electric lifting door, and the two ends thereof are respectively pivotally connected with the lifting door by a bearing (15), and the screw (23) is terminated by the driving wheel (24) and the lifting gate The spindle (14) is interlocked, and the spindle (14) is driven to rotate by the motor (12), and when the lifting gate (11) is opened and closed, the screw (23) is rotated, and the driven wheel (13) is rotated. The driving wheel (24) is composed of a loop-shaped transmission element (6), wherein the transmission element (6) encloses the driven wheel (13) and the driving wheel (24) for the screw (23) And the main shaft (14) is bidirectionally coupled to each other; the guide (21) is disposed in parallel with the screw (23), the screw (23) is threaded by a guiding member (22), and the guiding member (22) The guide rails (21) are adjacent to each other to form a relative restriction on the guiding member (22) by the guide rail (21), so that the guiding member (22) cannot rotate along with the screw (23), and the guiding member is provided (22) a reciprocating displacement along the guide rail (21); the retractor (4) is in contact with the guiding member (22). The weight (31) is suspended from one side of the electric lift door by a lanyard (32), and the lanyard (32) is turned around the rim of a pulley (33) to be coupled with the retractor (4) And receiving the lanyard (32) by the retractor (4) to maintain the lanyard (32) in a stretched state, whereby the guiding member (22) and the weight (31) The locator (5) has a starting lever (51), an urging rod (52) and a supporting block (53), wherein the starting lever (51) and the supporting block (53) is fixed outside the displacement path of the weight 1325463 (31), the bottom end of the urging rod (52) is pivotally connected to the starting sample (51), and the yoke (52) is slanted against the bearing The top edge of the block (53) extends obliquely toward the bottom edge of the weight (31) according to the top end of the yoke (52), and the yoke (52) is supported by the support block (53) Forming support, according to which the weight (31) is positioned at a high position, and the reserve is used to activate the lifting door (11) to rise and open; and the starting lever (51) and the urging rod (52) There is a torsion spring (54) (as shown in Figure 2), according to the normal state of the slamming rod (52) Holding the counterweight (31) is formed by abutting latch state. Referring to FIG. 3 and FIG. 4, the retractor (4) is composed of a box body (41), a center shaft (42), a reel (43) and a scroll spring (44). The casing (41) penetrates a through hole (411) in the peripheral wall, so that the lanyard (32) can enter the inside of the casing (41) through the through hole (411), and the central shaft (42) is erected on the casing (41), and the two ends of the central shaft (42) are respectively pivotally connected to the top and bottom ends of the casing (41), and the reel (43) is axially coupled to the central shaft (42), and the end of the lanyard (32) Connected to the reel, the central shaft (42) is rotated in conjunction with the reel (43), and the lanyard (32) is received and placed in cooperation with the displacement of the guiding member (22) for the lanyard (32) Maintaining the tension state; please refer to FIG. 5, the inside of the box body (41) is provided with a fixing pin (412) adjacent to the outer edge, and the outer end of the scroll spring (44) and the fixing pin (412) Hooking, the inner end of which is in contact with the central shaft (42), according to which, when the central shaft (42) rotates, that is, the scroll spring (44) is elastically deformed, and the coil spring (44) is used to provide elasticity. The force drives the central shaft (42) to rotate, 俾The retractor lanyard (32) persons. The electric lift door according to the first embodiment of the present invention is installed, and the main shaft (14) passes through the driven wheel when the motor ((2) is driven by the 1325463 to drive the main shaft (14) to rotate the lower lift door (11) to close the portal ( 13) driving the screw (23) to rotate, the guiding element (22) is displaced and pulls the s-heavy weight (31) to rise to a high position, at this time, by the positioning 5|(5) The block (31) is formed to resist 'to position the weight (31) at a height without falling (as shown in Figure 1), when the motor (12) drives the spindle (14) to rotate the roll When the lifting door (11) is opened to open the portal, the screw (23) is rotated in the reverse direction, and the 5th guiding member (2 2 ) is reversely displaced. At this time, the weight (31) is subjected to the positioning (.5). After the arrival, still staying at a high place and not falling, the retractor (4) can retract a part of the lanyard (32), so that the lanyard (32) is on the guiding element (22) The braiding state is still maintained between the counterweight (31), so the present invention allows the counterweight (31) to be left high by the positioner (5), except for the first closing. (丨2) It takes electric energy to pull the weight (31) up to a high position. Under normal circumstances, the operation of the electric lift door does not require power to support the weight (31: ^ when the lift door (11) After the portal is closed and the emergency is interrupted and the power supply is interrupted, the motor (12) cannot be used to provide power to open the portal. The user pulls the urging lever (52) to release the weight (31). The support 'the weight (31) 下落 falls due to its own weight. When the weight (31) falls from a height, its potential energy is converted into kinetic energy and pulled through the lanyard (32). The guiding member (22) is displaced, and the guiding member (22) is displaced to rotate the screw (23) to drive the spindle (14) to rotate and retract the lifting door through the driven wheel (13) and the driving wheel (24) ( 11), to achieve the purpose of opening the portal to escape, and because the counterweight (31) 12 1325463 is called, its falling speed is gradually accelerated by the low speed, so the lifting of the lifting door (ii) will not be as Conventional technology generally occurs, the phenomenon of rushing occurs, the safety of use is high, and The weight (31) is driven by gravity to drive the lifting door to act, even if it is used for a long time, it is repeatedly operated and has high reliability. Furthermore, the transmission wheel set of the preferred embodiment may also be chained. The wheel and the transmission component are replaced by pulleys and belts respectively, and the transmission and transmission wheel set composed of the sprocket and the transmission component can be replaced by a transmission structure composed of gears, and the replacement is suitable for those skilled in the art. The change that is easily conceived does not depart from the scope of the present invention. As described above, the present invention fully satisfies the intended purpose and has outstanding effects by the composition of the first creation. In the first place, Chengcheng meets the requirements of the invention patent and submits an application according to law. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic cross-sectional view of a preferred embodiment of the present invention. • Figure 2 is a plan view of a torsion spring in accordance with a preferred embodiment of the present invention. Figure 2 is a left side view of the retractor of the preferred embodiment of the present invention. Figure 4 is an axial cross-sectional view of the retractor of the preferred embodiment of the present invention. Figure 5 is a plan view of a scroll spring of a preferred embodiment of the present invention. [Main component symbol description] 11 lifting door 12 motor 13 1325463 driven wheel spindle bearing linear moving group rail guiding element screw driving wheel counterweight lanyard pulley retractor box body through hole fixing pin shaft winding coil spring positioning ι§ Starting rod damper rod 1325463 5 3 support block 54 torsion spring 6 transmission element