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CROSS REFERENCE TO RELATED APPLICATION 
     This is a National Stage of International Application PCT/KR2006/001952, filed 24 May 2006, which claims the benefit of Application No. 10-2005-0069334, filed in Korea on 29 Jul. 2005, the disclosures of which Applications are incorporated by reference herein. 
     FIELD OF THE INVENTION 
     The present invention relates to a revolving door installed at an entrance of a building, and in particular to an automatic revolving door having a plurality of revolving wings, in which the revolving wings are hinged at a horizontal plate to pivotally move toward a transparent wall member so that a wider inner passage area is obtained by unfolding the revolving wings towards the transparent wall member. The term “unfold” (or “unfolding”, “unforlable” or similar) used in this disclosure refers to the movement of each revolving wing from the initial blocking position to an open or unblocking position. 
     BACKGROUND OF THE INVENTION 
     Generally, a revolving door is often installed at an entrance of a building, and enables people and various things to pass through the revolving door. 
     In a construction of a conventional revolving door, a plurality of revolving wings  101  and  101 ′ are installed at a vertical revolving shaft  100  as shown in  FIG. 9 , with a transparent wall member  103  being installed at an outer side of the revolving wings  101  and  101 ′, with the transparent wall member  103  having entrances  102  and  102 ′. 
     An additional opening and closing door  104  is installed at a side or at both sides of the transparent wall member  103 , so that some passenger or a lengthy thing passes. 
     The conventional revolving door is designed so that a user pushes a revolving wing and allows the door to rotate, whereby the user can pass the revolving door. 
     Recently, a driving force device is installed at the revolving door, and a detection sensor is installed at an entrance. With the above construction, when a user comes closer to the door, the detection sensor detects the movement of the user and applies electric power to the driving force device, and the connected revolving shaft is automatically rotated, so that the user can easily passes without physically pushing the door. 
     In particular, the conventional revolving door and automatic revolving doors have the problems that a user&#39;s thing or clothes may be caught between the end of the revolving door and the transparent wall member. In the case that it is supposed to pass a long thing, such things cannot pass the revolving door based on the installation angle of the revolving wings. 
     Each revolving wing is designed with a revolving folding structure at one side or both sides of the revolving shaft. With this structure, when a certain safety accident occurs, it is possible to quickly cope with the accident by folding a corresponding wing. In the case that a long thing is intended to pass through the revolving door, a corresponding revolving wing is folded in one side, so that a certain passage space is obtained. 
     However, the automatic revolving door and the folding structure of the revolving wing are folded in parallel with respect to the center revolving shaft. Even when the revolving wings are folded, since the revolving wings and the center revolving shaft hinged are positioned at the center of the revolving door, it is impossible to obtain a desired wide passage space. 
     Namely, the conventional revolving door or automatic revolving door commonly has a number of revolving wings at the vertical center revolving shaft. In the case that the revolving wings are folded so as to obtain a desired wide passage space or a safety, the revolving wings are folded from the center revolving shaft, so that it is impossible to obtain wide passage spaces because the center revolving shaft and revolving wings still remain at the inner center of the revolving door. 
     In the case that the user uses the revolving door together with companion or VIP or entertainment star uses the door, only a singly user should pass through the door, so that a security problem occurs. In a place in which vehicles are exhibited or large size products are exhibited, since the vehicles and large size things do not enter the door, a large size opening and closing door should be additionally installed. 
     BRIEF SUMMARY OF THE INVENTION 
     Accordingly, it is an object of the present invention to overcome the problems encountered in the conventional art. 
     It is another object of the present invention to provide an automatic revolving door having a plurality of revolving wings, in which each revolving wing is engaged at a lower side of a horizontal plate driven by a driving motor with the revolving wings being displaced at regular angles, and an upper outer side of the revolving wing is hinged at an outer end of the support of the horizontal plate, and the upper inner side of the revolving wing is slidable at a lower side of the cross bar of the horizontal plate, and each revolving wing is unfolded in the direction of the outer wall member with respect to the outer front end. With the above construction, because a conventional center rotary shaft is not provided, the function of the revolving door is improved. When it is needed to open the passage of the revolving door, the revolving wing is folded in the inward direction of the wall member, so that the passage of the revolving door is fully opened. Therefore, a VIP who requires an enhanced security and a private entertainer and his companion can freely pass there-through. In addition, vehicles or big size things like furniture can pass through the revolving door, so that convenience is enhanced. It is possible to freely pass various things without providing additional opening and closing doors. A larger number of people can concurrently enter the door, so that efficiency is enhanced. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view illustrating an automatic revolving door according to the present invention; 
         FIG. 2  is a lateral cross sectional view illustrating an automatic revolving door according to the present invention; 
         FIG. 3  is a plane view illustrating an automatic revolving door according to the present invention; 
         FIG. 4  is a lateral cross sectional view illustrating a major part of an automatic revolving door according to the present invention; 
         FIG. 5  is a perspective view illustrating an opening and closing operation of a revolving wing of an automatic revolving door according to the present invention; 
         FIG. 6  is a plane view illustrating an opened revolving wing of the automatic revolving door according to the present invention; 
         FIGS. 7 and 8  are views illustrating a guide hole of an automatic revolving door according to the present invention, of which: 
         FIG. 7  is an enlarged cross sectional illustrating an elastic seat having a cut line at a guide hole of an upper plate; and 
         FIG. 8  is an enlarged cross sectional illustrating a state that a sliding unit and a movable plate are together installed at an upper side of a guide hole of an upper plate. 
         FIG. 9  is a plane view illustrating the whole structure of the conventional automatic revolving door. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The preferred embodiments of the present invention will be described with reference to the accompanying drawings. 
       FIG. 1  is a perspective view illustrating an automatic revolving door according to the present invention, and  FIG. 2  is a lateral cross sectional view illustrating an automatic revolving door according to the present invention, and  FIG. 3  is a plane view illustrating an automatic revolving door according to the present invention. 
     An outer body  10  is installed at the upper side of vertical frames  2  and  2 ′ having transparent wall members  1  and  1 ′. An inner body  20  having a horizontal plate  21  is installed at an inner lower side of the outer body  10 . A plurality of separated revolving wings  30  and  30 ′ are installed at the lower side of the horizontal plate  21 . The inner body  20  and the revolving wings  30  and  30 ′ are concurrently rotated by a rotational driving force of the driving motor  11  installed at an upper side of the outer body  10 . An upper side of each revolving wing  30  and  30 ′ is rotatably fixed with the hinge shaft  34  at an inside area of the inner body  20 . Another upper side of each revolving wing is slidably installed at the crossbars  40  and  40 ′ crossing the inner body  20 . 
     A plurality of rotation rollers  50  and  50 ′ engaged at the outer side of the inner body  20  are supported by the support protrusion  12  protruded from the inner side of the outer body  10 , and the revolving wings  30  and  30 ′ are unfolded toward the transparent wall members  1  and  1 ′ along the crossbars  40  and  40 ′ with respect to the hinge shaft  34 . 
     The support members  41  and  41 ′ of which ends are fixed at the inner wall of the inner body  20  are installed at the lower sides of the crossbars  40  and  40 ′ in the crossing shape, and the hinge shafts  34  of the revolving wings  30  and  30 ′ are inserted into the outer sides of the support members  41  and  41 ′. A door rail  31  is formed at the upper sides of the revolving wings  30  and  30 ′, and a moving rod  33  installed at an upper side of the slider  32  is movably coupled at the crossbars  40  and  40 ′. With the above construction, the revolving wings  30  and  30 ′ can be unfolded toward the transparent wall members  1  and  1 ′ with respect to the hinge shaft  34  by the sliding movement of the slider  32  and the moving rod  33 . See  FIG. 6 . 
     The inner side of the inner body  20  is finished with the horizontal plate on the lower side of the inner body  20 . A guide elongated hole  22  is formed so that the moving rod  33  of the slider  32  reciprocates. A rubber seat  24  having a cut line  23  is provided in the guide elongated hole  22 . A cover plate  25  ( FIG. 8 ) movable with the moving rod  33  is provided on an upper side of the guide elongated hole  22 , so that the interior of the inner body  20  is not seen from the lower side of the horizontal plate  21  through the guide elongated hole  22 . 
     In the drawings, reference numeral  45  represents a slit of the crossbar. 
     The operation of the revolving door having unfoldable revolving wings according to the present invention will be described with reference to the accompanying drawings. 
     The basic structure of the automatic revolving door according to the present invention is provided with the vertical frames  2  and  2 ′ spaced at regular intervals, and transparent wall members  1  and  1 ′ formed in a circular shape between the vertical frames  2  and  2 ′. The entrance is provided between the vertical frames  2  and  2 ′ where the transparent wall members  1  and  1 ′ are not present. 
     The transparent wall members  1  and  1 ′ are formed of tempered glass or high strength synthetic resin. 
     As shown in  FIG. 4 , the outer body  10  including various driving elements and operation parts is provided at the upper sides of the transparent wall members  1  and  1 ′ and the vertical frames  2  and  2 ′. The driving motor  11  is engaged at the inner side or the upper side of the outer body  10  so as to drive the revolving wings  30  and  30 ′. 
     The inner body  20  is provided at the inner side of the outer body  10  and is rotated together with the revolving wings  30  and  30 ′ having the hinged engagement of the revolving wings  30  and  30 ′. 
     A plurality of rotating rollers  50  and  50 ′ are installed at the outer surface of the inner body  20  and are supported by the support protrusion  12  protruded from the inner side of the outer body  10 . As the driving motor  11  operates, the inner body  20  is stably supported by the support protrusion  2  of the outer body  10  for thereby implementing a stable rotation. 
     In particular, the revolving wings  30  and  30 ′ hinge-fixed at the inner body  20  are unfold-rotated from the inner body  20  to the transparent wall members  1  and  1 ′. 
     The hinge shaft  34  and the door rail  31  are provided at the upper sides of the revolving wings  30  and  30 ′, and the revolving wings  30  and  30 ′ hinge-engaged with the inner wall of the inner body  20  are rotated to unfold toward the transparent wall members  1  and  1 ′. 
     The door rail  31  formed at the upper ends of the revolving wings  30  and  30 ′ allows the stable support and unfolding of the revolving wings  30  and  30 ′ supported by the hinge shaft  34 . 
     The slider  32  inserted into the door rail  31  is provided with a moving rod  33  in the upward direction, and the upper end of the moving rod  33  is slidably inserted into the lower sides of the crossbars  40  and  40 ′ which cross the inner body  20 . 
     Therefore, when a rotational force is applied to the revolving wings  30  and  30 ′ so as to fully open the revolving wings  30  and  30 ′ so that the vehicles or large size things or a number of people can pass concurrently, as shown in  FIG. 5 , the moving rod  33  slides along the slit hole  45  of the crossbars  40  and  40 ′, and the slider  32  of the lower side of the moving rod  33  slides along the door rail  31 , so that the door rail  31  and the removing wings  30  and  30 ′ are rotated and unfolded with respect to the hinge shaft  34  based on the fixed position of the crossbars  40  and  40 ′. 
     The hinge shaft  34  may be directly fixed at the inner side of the inner body  20 . It is arranged diagonally from the centers of the crossbars  40  and  40 ′ so as to enhance the support force, with each end of the same being fixed at the inner wall of the inner body  20  and being inserted into the ends of the support members  41  and  41 ′, so that the weight of the revolving wings  30  and  30 ′ is transferred to the support members  41  and  41 ′, whereby it is possible to maintain a stable support force and installation state. 
     Therefore, when each revolving wing  30  and  30 ′ positioned diagonally from each other and rotating concurrently is rotated-unfolded toward the transparent wall members  1  and  1 ′, as shown in  FIG. 6 , the inner side of the revolving door is fully opened, so that many people can pass together and vehicles or large size furniture can pass through the door. 
     When the fully unfolded revolving wings  30  and  30 ′ are intended to return to their original positions, the slider  32  is moved toward the center of the crossbars  40  and  40 ′ along the door rail  31 , so that the revolving wings  30  and  30 ′ are naturally crossed from each other and return to their original positions. 
     The users may directly perform the unfolded and returning forces of the revolving wings  30  and  30 ′. A certain actuator or emerging unit may be provided, so that the automatic unfolding and returning procedures of the revolving wings  30  and  30 ′ may be performed. 
     Since the inner side of the inner body  20  is exposed to outside, the outer look is bad. An upper plate  21  is formed at the bottom of the inner body  20 , so that the inner side of the same is hidden. A guide elongated hole  22  is formed at the upper plate  21  so that the moving rod  33  connecting the inner body  20  and the revolving wings  30  and  30 ′ is not interfered. 
     Here, the number of the guide elongated holes  22  is determined based on the number of the revolving wings  30  and  30 ′ so as to correspond with the lower side of the crossbars  40  and  40 ′ based on an operation range of the moving rod  33 . When the revolving wings  30  and  30 ′ are folded, almost lower sides of the guide elongated hole  22  are opened downwards, so that the inner side of the inner body  20  can be seen from outside. So as to prevent the above problems, as shown in  FIG. 7 , a rubber seat  24  having a cut line  23  is formed at the inner side of the guide elongated hole  22 , so that the moving rod  33  is moved along the cut line  23  of the rubber seat  24 . With the above construction, the inner side of the upper plate  21  is not seen by the rubber seat  24 . 
     In addition, as shown in  FIG. 8 , a cover plate  25  having a length longer than the guide elongated hole  22  may be placed on the upper surface of the guide elongated hole  22  instead of the rubber seat  24 . The moving rod  33  passes through the cover plate  25 . Upon the sliding of the moving rod  33 , the cover plate  25  moves. The guide elongated hole  22  may be continuously closed. 
     INDUSTRIAL APPLICABILITY 
     As described above, the automatic revolving door having a dispersion unfolding structure of a revolving wing according to the present invention is designed to satisfy the inherent functions of the revolving door without the center rotary shaft. In the case that the passage of the revolving door is opened, the revolving doors are folded inwardly and unfolded for thereby fully opening the passage of the revolving door. With the above construction, VIP or entertainment star who needs high security can enter, and the vehicles or large size furniture can enter for thereby enhancing the use of the same. The movements of various things are not interfered without providing an additional opening and closing door. Many people can concurrently enter the revolving door, so that the efficiency is maximized. 
     As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described examples are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Summary:
An automatic revolving door having a plurality of foldable revolving wings, in which each revolving wing is disposed at a lower side of a horizontal plate which is driven by a driving motor, and an upper outer side of each revolving wing is coupled with hinge to the horizontal plate, and an upper inner side of each revolving wing is slidably coupled to a cross bar attached to the horizontal plate, and each revolving wing is pivotally moveable toward outer wall members of the door to provide a wide opening between the outer wall members.