Patent Publication Number: US-2006000563-A1

Title: Elevator doorway door apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS  
      This is a Continuation Application of PCT Application No. PCT/JP2004/005252, filed Apr. 13, 2004, which was published under PCT Article 21(2) in Japanese.  
      This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2003-206955, filed Aug. 8, 2003, the entire contents of which are incorporated herein by reference. 
    
    
     BACKGROUND OF THE INVENTION  
      1. Field of the Invention  
      The present invention relates to a doorway door apparatus of a multi-speed type for opening and closing an elevator doorway of an elevator hall.  
      2. Description of the Related Art  
      On a wall face of an elevator hall, as shown in  FIG. 1 , an elevator doorway  2  is formed of a three-way frame  1 . At the doorway  2 , a door unit  3  for opening and closing the doorway is provided; an operating panel  4  is provided at a lateral portion of the doorway  2 ; and a cargo call registration button  5  and a display device  6  are provided on the operating panel  4 .  
      The door unit  3  for opening and closing the doorway  2  is generally known to be of a multi-speed type such that a plurality of door panels move at different speeds in one direction to open and close the doorway  2 .  
      In the door unit  3  shown in  FIG. 1 , two door panels  10   a,    10   b  are used. These door panels  10   a,    10   b  are moved at different speeds in the right direction in  FIG. 1  along a threshold  7  by a drive device (such as a electromotive machine, decelerator machine, a pulley, or a geared belt), although not shown, whereby the doorway  2  is opened.  
       FIG. 2  shows a state in which the door panels  10   a,    10   b  are disposed when they are seen upwardly of the door unit  3 . These door panels  10   a,    10   b  are displaced forwardly and backwardly each other and are movably supported in the transverse direction.  
      The state indicated by the solid line in  FIG. 2  is a door closed state. From this state, during door opening, each of the door panels  10   a,    10   b  is driven by the drive device (not shown), and moves in the right direction.  
      At this time, one door panel  10   a  moves at a speed which is substantially two times as high as the other door panel  10   b.  In this manner, the door panels  10   a,    10   b  are stored in a door bag portion  8  in a state in which they are superimposed forwardly and backwardly each other as indicated by the broken line, thereby these door panels are established in a door open state in which the doorway  2  is opened.  
      From this door open state, each of the door panels  10   a,    10   b  moves in the left direction when they are driven by the drive device (not shown). At this time as well, one door panel  10   a  moves at a speed which is substantially two times as high as the other door panel  10   b,  and enters a door closed state. During door closing, one side portion of one door panel  10   a  and the other side portion of the other door panel  10   b  enter a state in which they are superimposed forwardly and backwardly each other.  
      Thus, in the door unit  3  of multi-speed type, a gap of a certain degree is provided to maintain smooth movement performance between one door panel  10   a  and the other door panel  10   b  which are adjacent to each other.  
      In the meantime, in the door unit  3  of double opening type which moves to the left and right when a set of door panels are oriented in an opposite direction to each other in one plane, during the door closing, the side faces between one door panel and the other door panel abut against each other and come into intimate contact with each other. Thus, the air tightness between these panels can be well maintained.  
      However, as described above, in the door unit  3  of multi-speed type, there is a need for providing a gap of a certain degree in order to maintain smooth movement performance between one door panel  10   a  and the other door panel  10   b  which are adjacent to each other. Therefore, during door closing, as shown in  FIG. 2 , a gap S is produced between the side portion of one door panel  10   a  and the side portion of the other door panel  10   b,  making it difficult to maintain the air tightness between these side portions. Thus, there is a problem that the noise in an elevator passage where an elevator cargo moves upwardly and downwardly leaks an elevator hall through the gap S, and noise shutout property is degraded, as shown by the arrow N. In addition, in a case that a fire occurs, there is a problem that a large amount of smoke leaks the elevator hall from the inside of the elevator passage through the gap S.  
     BRIEF SUMMARY OF THE INVENTION  
      It is an object of the present invention to provide an elevator doorway door apparatus capable of enhancing noise shutout property and smoke shutout property while the air tightness between side portions of door panels during door closing is well maintained without degrading the movement performance of the door panels.  
      According to an embodiment of the present invention, an elevator doorway door apparatus comprises:  
      door panels displaced forwardly and backwardly each other and movably supported in a transverse direction, the door panels being arranged in an uneven step shape at the left and right during door closing to close a doorway, and moving at different speeds in an identical direction during door opening to open the doorway; and  
      a closing member provided at a side portion of one of the door panels, the closing member being opposed to a side portion of an adjacent door panel during door closing, and closing a gap between two door panels.  
      According to another embodiment of the present invention, an elevator doorway door apparatus comprises:  
      two sets of door panels disposed forwardly and backwardly each other and movably supported in a transverse direction, the door panels being arranged in an uneven step shape at the left and right during door closing to close a doorway, and moving at different speeds in an identical direction during door opening to open the doorway, and door panels being provided as a set such that one set of door panels are arranged symmetrical to another set of door panels at the left and right; and  
      a closing member provided at a side portion of one of the door panels of each set, the closing member being opposed to a side portion of an adjacent door panel during door closing, and closing a gap between two door panels.  
      According to another embodiment of the present invention, an elevator doorway door device comprises:  
      door panels movably supported in a predetermined direction and including one door panel which is lower than another door panel in movement speed during door opening and closing, and  
      a closing member provided on at least one of the door panels, the closing member closing a gap between the adjacent door panels during door closing,  
      wherein the one door panel is larger on one side portion and is smaller on the other side portion.  
      According to another embodiment of the present invention, an elevator doorway door apparatus comprises:  
      door panels movably supported in a predetermined direction and including one door panel with a high movement speed during door opening and closing and another door panel with a low movement speed; and  
      a closing member provided on at least one of the door panels, the closing member closing a gap between the adjacent door panels during door closing,  
      wherein a transverse width L 2  of the one door panel and a transverse width L 1  of the another door panel have a relationship of L 1 &gt;L 2 .  
      Additional objects and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention.  
      The objects and advantages of the present invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out hereinafter. 
    
    
     BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING  
      The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the general description given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention in which:  
       FIG. 1  is a perspective view when a conventional elevator doorway door apparatus is seen from the side of an elevator hole;  
       FIG. 2  is a sectional view of a conventional elevator doorway door apparatus;  
       FIG. 3  is a sectional view of the apparatus according to a first embodiment of the present invention;  
       FIG. 4  is a sectional view showing a structure of a mount portion of a closing member in the elevator doorway door apparatus;  
       FIG. 5  is a front view of the elevator doorway door apparatus;  
       FIG. 6  is a sectional view of the apparatus according to a second embodiment of the present invention;  
       FIG. 7  is a sectional view of the apparatus according to a third embodiment of the present invention;  
       FIG. 8  is a sectional view of the apparatus according to a fourth embodiment of the present invention;  
       FIG. 9  is a sectional view of the apparatus according to a fifth embodiment of the present invention;  
       FIG. 10  is a sectional view showing a modified example of the above-described embodiments when a sealing material of the closing member is brought into intimate contact with a side portion of a door panel;  
       FIG. 11  is a sectional view of the apparatus according to a sixth embodiment of the present invention;  
       FIG. 12  is a sectional view of the apparatus according to a seventh embodiment of the present invention;  
       FIG. 13  is a sectional view of the apparatus according to an eighth embodiment of the present invention;  
       FIG. 14  is a sectional view of the apparatus according to a ninth embodiment of the present invention; and  
       FIG. 15  is a sectional view of the apparatus according to a tenth embodiment of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION  
      An embodiment of the apparatus according to the present invention will now be described with reference to the accompanying drawings. Like constituent elements corresponding to conventional constituent elements are designated by like reference numerals. A detailed description of these elements is omitted here.  
     First Embodiment  
      FIGS.  3  to  5  show a first embodiment of the present invention. As shown in  FIG. 3 , each of door panels  10   a,    10   b  has a side plate  11  which is bent at a substantial right angle on the rear side at the peripheral edge thereof, and further, a bent piece  11   a  which is inwardly bent at a substantial right angle is formed integrally at an edge portion of the side plate  11 . In addition, a reinforcing member  12  is mounted at the rear face of each of the door panels  10   a,    10   b.  The door panel  10   a  is operated to be opened and closed by means of a drive mechanism (not shown).  
      A sectional L-shaped mount plate  20  is mounted by a screw  21  at the external face of one side plate  11  on one door panel  10   a  with a high movement speed, namely, of the side plate  11  facing the side of a door bag portion  8 . Further, a sectional L-shaped closing plate  22  is mounted on the mount plate  20  by a screw  23 .  
      The mount plate  20  and the closing plate  22  each have a length which is substantially identical to the height of the door panels  10   a,    10   b.  The closing plate  22  is interposed at the inside of the rear side of the door panel  10   b  with a low movement speed disposed so as to be opposed to the bent piece  11   a  of one side plate  11  of the door panel  10   b,  namely, of the side plate  11  at the opposite side of the door bag portion  8 . A sealing material  24  made of an elastic material such as a rubber opposed to the edge portion of the bent piece  11   a  is mounted on a plate surface of the closing plate  22 . The sealing material  24  has a length which is continuous over a substantially full length interval of the height dimension of the closing plate  22 , and a closing member  25  is formed of the sealing material  24  and the closing plate  22 .  
      On the mount plate  20 , an elongated hole  26  is formed in a transverse direction as shown in  FIG. 4 ; the screw  23  is spirally inserted into the closing plate  22  through the elongated hole  26 ; and the closing plate  22  is fixed to the mount plate  20  by tightening the screw  23 . By loosing the screw  23 , the closing plate  22  is moved in a transverse direction along the elongated hole  26 . During door closing, a position of the closing plate  22  can be adjusted such that the sealing material  24  properly comes into intimate contact with the edge portion of the bent piece  11   a.    
      As shown in  FIG. 5 , suspension portions  102 ,  104  are provided at the upper portions of the door panels  10   a,    10   b,  respectively, and hanger rollers  106  are provided on the back faces of these suspension portions  102 ,  104 . These hanger rollers  106  are placed so as to be rolled on a door rail  108  provided at an elevation port, and the door panels  10   a,    10   b  are suspended on this door rail  108 .  
      On the door panel  10   b,  an interlock portion  110  for interlocking the door panel  10   b  during opening and closing of the door panel  10   a  is provided so as to be locked with the door panel  10   a.    
      At the interlock portion  110 , a substrate  112  fixed at the upper portion of the door panel  10   b  is provided, and a tip end of this substrate  112  protrudes upwardly of the door panel  10   a.  In addition, pulleys  114  are provided at both ends of the substrate  112 , and a loop shaped rope  116  is overhung to be wound around these pulleys  114 .  
      In order to transmit to the door panel  10   b  a drive force when the door panel  10   a  is opened and closed via the rope  116 , a fixing point  122  fixed to an edge  120  of the elevation port by means of a fixing member  118  is provided at the rope  116 , and a moving point  126  fixed to the door panel  10   a  by a fixing member  124  is also provided at the rope  116 .  
      As a result, in the case where the door panel  10   a  is moved to be opened and closed, the moving point  126  of the rope  116  moves by identical distance in the same direction as that of the door panel  10   a.  By moving this moving point  126 , the rope  116  rotates while sliding the pulleys  114 . On the other hand, this rope  116  is fixed to an edge of the elevation port at the fixing point  122 . Thus, when the rope  116  rotates, the door panel  10   b  itself is interlocked and moved at a speed which is ½ as high as usual in the same direction as that of the door panel  10   a  via this interlock portion  110  with the fixing point  122  being a fulcrum.  
      Turning to  FIG. 3 , on the rear side of the door panel  10   b  with a low movement speed, a release portion  28  is provided for avoiding mechanical interference between the closing plate  22  and the door panel  10   b  when the door  10   a  with a high movement speed moves relative to the door panel  10   b  with a low movement speed. The release portion  28  is formed by reducing the thickness of the door panel  10   b  at a portion of an interval H between the bent piece  11   a  on the door panel  10   b  and a side face of the door panel  10   b  at the opposite side of the bent piece  11   a,  and then, forming a space which enables passing of the closing member  25  on the rear side of the door panel  10   b.    
      That is, with respect to the door panel  10   b  with a low movement speed, thickness T 1  of a side portion at an opposite side (right side in  FIG. 3 ) of a side which comes into contact with a sealing member  24  of the door panel  10   a  with a high movement speed is smaller than thickness T 2  of a side portion of a side (left side in  FIG. 3 ) which comes into contact with the sealing member  24  of the door panel  10   a  with a high movement speed. The release portion  28  is formed of a difference in thickness, enabling passing of the closing member  25  at the rear side of the door panel  10   b.    
      The state indicated by the solid line in  FIG. 3  is a door closed state. From this state, during door opening, one door panel  10   a  moves to the side of the door bag portion  8  in the right direction in  FIG. 3  at a high speed, and at the same time, the other door panel  10   b  moves to the side of the door bag portion  8  in the right direction in  FIG. 3  at a low speed.  
      At this time, the closing plate  22  of one door panel  10   a  moves relatively the rear side of the other door panel  10   b.  However, at the side of the door bag portion  8  on the other door panel  10   b,  the thickness of the release portion  28  and the thickness of the reinforcing member  12  become small, so that the closing member  25  moves without interfering with the door panel  10   b.  Therefore, the closing member  25  can move smoothly without degrading the movement performance of the door panels  10   a,    10   b.    
      By movement of the door panels  10   a,    10   b  in the right direction, the door panels  10   a,    10   b  are stored in a state in which they are superimposed forwardly and backwardly each other at the door bag portion  8  as indicated by the broken line. These door panels  10   a,    10   b  are established in a door open state in which the doorway  2  is opened.  
      From this door open state, each of the door panels  10   a,    10   b  moves at different speeds in the left direction in  FIG. 3 . Then, immediately before entering the door closed state, the sealing material  24  of the closing member  25  provided on the door panel  10   a  elastically abuts against and comes into intimate contact with the edge portion of the bent piece  11   a  of the door panel  10   b.    
      As has been described above, according to the present embodiment, the gap S between the side portions of the door panels  10   a,    10   b  under the door closed state is sealed with the closing plate  22  and sealing material  24 , and the air tightness between these side portions is well maintained. Accordingly, the leakage of noise from an elevation passage to an elevator hall and the leakage of smoke when a fire occurs are suppressed, and the noise shutout property and the smoke shutout property can be enhanced.  
      The sealing material  24  of the closing member  25  provided on one door panel  10   a  merely comes into contact with the other door panel  10   b  only during door closing. During door opening when the door panels  10   a,    10   b  move to the side of the door bag portion  8 , the closing member  25  and the door panel  10   b  enter a non-contact state. Therefore, the door panels  10   a,    10   b  can be moved smoothly without degrading the movement performance of the door panels  10   a,    10   b  during the door opening.  
      Other embodiments of the elevator doorway door apparatus according to the present invention will be described. The same portions as those of the first embodiment will be indicated in the same reference numerals and their detailed description will be omitted.  
     Second Embodiment  
       FIG. 6  shows a second embodiment of the present invention. In the second embodiment, on the external face of one side plate  11  on the door panel  10   a,  a flat closing plate  22  is mounted by the screw  23 .  
      The closing plate  22  has a length which is substantially equal to the height of the door panels  10   a,    10   b.  A part of the closing plate  22  is interposed at the inside of the rear side of the door panel  10   b  with a low movement speed, and is opposed to a bent piece  11   a  of a side plate  11  on the door panel  10   b.  On its opposite face, a sealing material  24  made of an elastic material such as a rubber which abuts against and comes into intimate contact with an edge portion of the bent piece  11   a  is mounted. The sealing material  24  has a length which is continuous over a substantially full length of the height dimension of the closing plate  22 , and a closing member  25  is formed of the sealing material  24  and the closing plate  22 .  
      A required number of shims  30  are interposed between the closing plate  22  and the side plate  11  of the door panel  10   a,  whereby the sealing material  24  can come into intimate contact with the edge of the bent piece  11   a  of the door panel  10   b  during door closing. A required number of shims  30  have an adjusting function. The other constituent elements have the same configuration as that of the first embodiment.  
      The state indicated by the solid line in  FIG. 6  is a door closed state. From this state, during door opening, one door panel  10   a  moves to the side of the door bag portion  8  in the right direction in  FIG. 6  at a high speed, and at the same time, the other door panel  10   b  moves to the side of the door bag portion  8  in the right direction in  FIG. 6  at a low speed.  
      At this time, the closing member  25  of the door panel  10   a  moves smoothly without interfering with the door panel  10   b  through the release portion  28  of the door panel  10   b.  By movement of the door panels  10   a,    10   b  in the right direction, the door panels  10   a,    10   b  are stored in a state in which they are superimposed forwardly and backwardly each other at the door bag portion  8  as indicated by the broken line. These door panels  10   a,    10   b  are established in a door open state in which the doorway  2  is opened.  
      From this door open state, during door closing, each of the door panels  10   a,    10   b  moves at different speeds in the left direction in  FIG. 6 . Then, immediately before entering the door closed state, as shown in the solid line, the sealing material  24  of the door panel  10   a  elastically abuts against and comes into intimate contact with the edge portion of the bent piece  11   a  of the door panel  10   b.    
      In this manner, a gap S between the side portions of the door panels  10   a,    10   b  under a door closed state is sealed with the closing plate  22  and the sealing material  24 , and the air tightness between these side portions is well maintained. Therefore, the noise shutout property and the smoke shutout property can be enhanced.  
     Third Embodiment  
       FIG. 7  shows a third embodiment of the present invention. In the third embodiment, as is the case with the first embodiment, the sectional L-shaped mount plate  20  is mounted by the screw  21  on the external face of one side plate  11  on the door panel  10   a.  Further, the sectional L-shaped closing plate  22  is mounted on the mount plate  20  by the screw  23 . The sealing material  24  made of an elastic material such as a rubber which abuts against and comes into intimate contact with an edge portion of the bend piece  11   a  of the door panel  10   b  is mounted on the closing plate  22 . The closing member  25  is formed of these sealing material  24  and closing plate  22 .  
      In the third embodiment, a transverse width L 1  of the door panel  10   b  with a low movement speed is larger than a transverse width L 2  of the door panel  10   a  with a high movement speed. When the door panel  10   a  with a high movement speed moves relatively to the door panel  10   b  with a low movement speed, the closing member  25  moves at an interval between the bent pieces  11   a  of the door panel  10   b  with a low movement speed.  
      Therefore, the thickness of the reinforcing member  12  of the door panel  10   b  is reduced so as not to interfere with the closing member  25 , thereby making it possible to form the release portion  28  which enables movement of the closing member  25 . There is no need for reducing the thickness of the side of the door bag portion  8  of the door panel  10   b,  and concurrently, manufacturing is facilitated.  
      In the third embodiment as well, the closing member  25  of the door panel  10   a  can be moved smoothly without interfering with the reinforcing member  12  of the door panel  10   b  or the side plate  11  at the side of the door bag portion  8 . In addition, under the door closed state, a gap S between the side portions of the door panels  10   a,    10   b  is sealed with the closing plate  22  and sealing material  24 ; the air tightness between these side portions is well maintained; and the noise shutout property and the smoke shutout property can be enhanced.  
     Fourth Embodiment  
       FIG. 8  shows a fourth embodiment of the present invention. In the fourth embodiment, a substantially sectional L-shaped plate material is used as the closing member  25 . The closing member  25  has a length which is substantially the same as the height of the door panels  10   a,    10   b.  This closing member  25  is mounted via the mount plate  20  on the side plate  11  at the side of the door bag portion  8  of one door panel  10   a.    
      The closing member  25  is formed in a substantial L shape having a first plate portion  25 a parallel to the side plate  11  of the door panel  10   b  and a second plate portion  25   b  parallel to the bent piece  11   a  of the door panel  10   b.  During door closing, as indicated by the solid line in  FIG. 8 , the second plate portion  25   b  advances inside of the bent piece  11   a,  and is opposed to the bent piece  11   a.  In this manner, a complex, narrow meandering shape is formed such that a passage going from an elevation passage to an elevator hole through a gap S between the side portions of the door panels  10   a,    10   b  at multiple stages. Thus, the gap S is substantially blocked, making it possible to suppress the leakage of noise from the elevation passage to the elevator hall and the leakage of smoke from the elevation passage to the elevator hall in a case that a fire occurs.  
     Fifth Embodiment  
      In the above-described embodiments, although an elevator doorway door apparatus using two door panels has been shown as an example, for example, it is possible to apply the present invention in the elevator doorway door apparatus using first, second, and third door panels  10   a,    10   b,    10   c  as shown as the fifth embodiment in  FIG. 9 .  
      In the fifth embodiment, from the door closed state indicated by the solid line, the first door panel  10   a,  the second door panel  10   b,  and the third door panel  10   c  move to the side of the door bag portion  8 , respectively, at the highest speed, at the second highest speed, and at a low speed. These door panels  10   a,    10   b,    10   c  are stored in the door bag portion  8  to be superimposed each other, as indicated by the broken line. These door panels  10   a,    10   b,    10   c  are established in a door open state.  
      From the door open state, the first door panel  10   a,  the second door panel  10   b,  and the third door panel  10   c  move to the left side, respectively, at the highest speed, at the second highest speed, and at a low speed. These door panels  10   a,    10   b,    10   c  are established in a door closed state.  
      On the external face of the side plate  11  at the side of the door bag portion  8  of the first door panel  10   a,  the closing member  25  formed of the closing plate  22  and the sealing material  24  is mounted via the mount plate  20 .  
      At the rear side of the door panel  10   b,  the release portion  28  which enables movement of the closing member  25  is provided. In addition, on the external face of the side plate  11  at the side of the door bad portion  8 , the closing member  25  formed of the closing plate  22  and the sealing material  24  is mounted via the mount plate  20 .  
      At the rear side of the third door panel  10   c,  the release portion  28  which enables movement of the closing member  25  is provided. In addition, on the external face of the side plate  11  at the side of the door bag portion  8 , the closing member  25  formed of the closing plate  22  and the sealing material  24  is mounted via the mount plate  20 .  
      During door closing, the sealing material  24  of the closing member  25  of the first door panel  10   a  abuts against and comes into intimate contact with the bent piece  11   a  of the side plate  11  of the second door panel  10   b.  The sealing material  24  of the closing member  25  of the second door panel  10   b  abuts against and comes into intimate contact with the bent piece  11   a  of the side plate  11  of the third door panel  10   c.  In this manner, a gap S between the side portions of the first door panel  10   a  and the second door panel  10   b  which are adjacent to each other, and a gap S between the side portions of the second door panel  10   b  and the third door panel  10   c  are sealed with the closing member  25 , respectively. Therefore, the air tightness between these side portions is well maintained, and the noise shutout property and the smoke shutout property can be enhanced.  
      In the above-described first, second, third, and fifth embodiments, the sealing material  24  of the closing member  25  has been brought into direct contact with the bent piece  11   a  of the side plate  11  of the door panels  10   b,    10   c.  However, as shown in  FIG. 10 , a receiving member  33  is mounted on the bent piece  11   a,  and the sealing material  24  of the closing member  25  may be abutted against the receiving member  33  so as to seal the gap S.  
     Sixth Embodiment  
      In the above-embodiments, the closing member  25  has been provided on one door panel with a high movement speed of door panels adjacent to each other. However, as shown as a sixth embodiment of the present invention in  FIG. 11 , for example, the door bag portion  8  is disposed at the left side of the doorway  2 ; the door panel  10   b  moves to the side of the door bag portion  8  at a high speed from a door closed state; and the door panel  10   a  moves to the side of the door bag portion  8  at a low speed. In the case of this structure, the closing member  25  is mounted on the side portion at the opposite side of the door bag portion  8  of the door panel  10   a  with a low speed. In this manner, advantageous effect similar to the case of the above-described embodiments can be achieved.  
     Seventh Embodiment  
       FIG. 12  shows a seventh embodiment of the present invention. In the seventh embodiment, a block member  40  is mounted on the rear of one side portion of the door panel  10   b  with a low movement speed. The thickness of one side portion of the door panel  10   b  is substantially large, and the thickness of the other side portion is smaller than that of such one side portion with the block member  40 .  
      During door closing, one door panel  10   a  having the closing member  25  and the other door panel  10   b  having the block member  40  move in the left direction in  FIG. 12 , at a high speed and a low speed, respectively. As indicated by the solid line, the sealing material  24  of the closing member  25  provided on the door panel  10   a  elastically abuts against and comes into intimate contact with the block member  40  of the door panel  10   b.  In this manner, under a door closed state, a gap S between the side portions of the door panels  10   a,    10   b  is sealed with the closing plate  22  and the sealing material  24 .  
      In the present embodiment, merely by mounting the block member  40  on the door panel  10   b,  the thickness of one side portion of the door panel  10   b  can be substantially larger than that of the other side, so that the present invention can be applied to a variety of door panels.  
     Eighth Embodiment  
       FIG. 13  shows an eighth embodiment of the present invention. In the eighth embodiment, a loopback piece  41  bent to the inside at a substantial right angle is provided integrally at the edge portion of the bent piece  11   a  at one side portion of the door panel  10   b  with a low movement speed.  
      During door closing, one door panel  10   a  having the closing member  25  and the other door panel  10   b  having the loopback piece  41  move in the left direction in  FIG. 10 , respectively, at a high speed and a low speed. As indicated by the solid line, the sealing material  24  of the closing member  25  provided on the door panel  10   a  elastically comes into planer contact with and comes into intimate contact with a surface of the loopback piece  41  of the door panel  10   b.  In this manner, under a door closed state, a gap S between the side portions of the door panels  10   a,    10   b  is sealed with the closing plate  22  and the sealing material  24 .  
      In the eighth embodiment, the sealing material  24  of the closing member  25  comes into planar contact with the loopback piece  41  of the door panel  10   b.  Thus, the sealing property of the gap S can be enhanced, and the damage of the sealing material  24  which comes into contact with the loopback piece  41  repeatedly is prevented over a long period of time, so that its durability can be enhanced.  
     Ninth Embodiment  
       FIG. 14  shows a ninth embodiment of the present invention. In the ninth embodiment, a multi-speed type elevator doorway door apparatus using two door panels  10   a  and  10   b  are disposed symmetrically at the left and right, and is provided as a multi-speed double opening type elevator doorway door apparatus. That is, this elevator doorway door apparatus comprises two sets of door panels in which two door panels  10   a,    10   b  are defined as one set, and one set of door panels  10   a,    10   b  and the other set of door panels  10   a,    10   b  are disposed so as to be arranged symmetrically at the left and right each other.  
      Door panels  10   a,    10   b  of each set are displaced forwardly and backwardly such that the door panel  10   a  of one set and the door panel  10   a  of the other set abut against each other during door closing.  
      One door panel  10   a  of one set moves at a high speed toward the door bag portion  8  in the right direction in  FIG. 11  during door opening, and the other door panel  10   b  moves at a low speed toward the door bag portion  8  in the right direction. One door panel  10   a  of the other set moves at a high speed toward the door bag portion  8  in the left direction in  FIG. 14 , and the other door panel  10   b  moves at a low speed toward the door bag portion  8  in the left direction. In this manner, a doorway  2  is opened.  
      During door closing, one door panel  10   a  of one set moves at a high speed in the left direction, and the other door panel  10   b  moves at a low speed in the left direction. One door panel  10   a  of the other set moves at a high speed in the left direction, and the other door panel  10   b  moves at a low speed in the right direction. In this manner, the doorway  2  is closed.  
      At the side portions of the door panels  10   a  of the respective sets with a high speed disposed forward and backwardly to be adjacent to each other, the closing plate  22  and the sealing material  24  are provided as closing members  25 . The sealing material  24  serving as the closing member  25  elastically abuts against and comes into contact with an edge portion of the bent piece  11   a  of the other door panel  10   b  which is adjacent to the door panel  10   a  when the door panels  10   a,    10   b  of each set are door closed.  
      With respect to the door panel  10   b  with a low movement speed in each set, thickness T 1  of a side portion at an opposite side of a side which comes into contact with the sealing member  24  of the door panel  10   a  with a high movement speed is smaller than thickness T 2  of a side portion of a side which comes into contact with the sealing member  24  of the door panel  10   a  with a high movement speed. With this difference in thickness, the closing member  25  can be passed on the rear side of the door panel  10   b.    
      In addition, a gap S between the side portions of the door panels  10   a,    10   b  of each set under a door closed state is sealed with the closing plate  22  and the sealing material  24 , whereby the air tightness between the side portions is maintained.  
      In the embodiment shown in  FIG. 14 , as in the third embodiment shown in  FIG. 7 , a transverse width L 3  of the door panel  10   b  with a low movement speed in each set is set to be greater than a transverse side L 4  of the door panel  10   a  with a high movement speed (L 3 &gt;L 4 ). When the door panel  10   a  with a high movement speed moves relatively to the door panel  10   b  with a low movement speed, it is possible to configure the ninth embodiment such that the closing member  25  can move at an interval between both of the bent pieces  11   a  of the door panel  10   b  with a low movement speed.  
      Further, in the ninth embodiment shown in  FIG. 14 , as in the seventh embodiment shown in  FIG. 12 , a block member may be mounted on the rear of one side portion of the door panel  10   b  with a low movement speed. This makes it possible to form the ninth embodiment such that, with this block member, the thickness of one side portion of the door panel  10   b  is substantially large, and the thickness of the other side portion of the door panel  10   b  is smaller than that of such one side portion, and to form the ninth embodiment such that the closing member  25  of the door panel  10   a  with a high speed comes into contact with the block member during door closing so as to close a gap between the side portions of the door panels  10   a,    10   b.    
      Moreover, in the case of the ninth embodiment shown in  FIG. 14 , as in the eighth embodiment shown in  FIG. 13 , a loopback piece to be inwardly bent at a substantial right angle may be integrally provided at the edge portion of the bent piece  11   a  at one side portion of the door panel  10   b  with a low movement speed. During door closing, the closing member  25  of the door panel  10   a  with a high speed is elastically brought into planar contact with a surface of the loopback piece, thereby making it possible to form the embodiment so as to seal a gap between the side portions of the door panels  10   a,    10   b.    
     Tenth Embodiment  
       FIG. 15  shows a tenth embodiment of the present invention. In the tenth embodiment, a multi-speed type elevator doorway door apparatus using three door panels  10   a,    10   a,    10   c  is disposed symmetrically at the left and right, and is provided as a multi-speed double opening type elevator doorway door apparatus. That is, this elevator doorway door apparatus comprises two sets of door panels in which first, second, and third door panels  10   a,    10   b,    10   c  are defined in one set. The door panels  10   a,    10   b,  and  10   c  of one set and the door panels  10   a,  lob,  10   c  of the other set are disposed so as to be arranged symmetrically at the left and right each other.  
      The door panels  10   a,    10   b,    10   c  of each set are displaced forwardly and backwardly such that the first door panel  10   a  of one set and the first door panel  10   a  of the other set abut against each other during door closing.  
      The first door panel  10   a  of one set moves at the highest speed toward the door bag portion  8  in the right direction in  FIG. 15  during door opening, the second door panel  10   b  moves at the second highest speed toward the door bag portion  8  in the right direction, and the third door panel  10   c  moves at a low speed toward the door panel portion  8  in the right direction. The first door panel  10   a  of the other set moves at the highest speed toward the door bag portion  8  in the left direction in  FIG. 15  during door opening, the second door panel  10   b  moves at the second highest speed toward the door bag portion  8  in the left direction, and the third door panel  10   c  moves at a low speed toward the door bag portion  8  in the left direction. In this manner, the doorway  2  is opened.  
      During door closing, the first door panel  10   a  of one set moves at the highest speed in the left direction, the second door panel  10   b  moves at the second highest speed, and the third door panel  10   c  moves at a low speed. In addition, the first door panel  10   a  of the other set moves at the highest speed in the right direction, the second door panel  10   b  moves at the second highest speed in the right direction, and the third door panel  10   c  moves at a low speed in the right direction. In this manner, the doorway  2  is closed.  
      At the side portions of the first and second door panels  10   a,    10   b  of each set disposed forwardly and backwardly to be adjacent to each other, the closing plate  22  and the sealing material  24  are provided as the closing members  25 , respectively. The sealing material  24  serving as one of the closing members  25  elastically abuts against and comes into intimate contact with the edge portion of the bent piece  11   a  of the other door panels  10   b,    10   c  which are adjacent to the door panels  10   a,    10   b  when the door panels  10   a,    10   b  of each set are door closed.  
      In this manner, under a door closed state, a gap S between the side portions of the door panels  10   a,    10   b,    10   c  of each set is sealed with the closing plate  22  and the sealing material  24 , and the air tightness between the side portions is maintained.  
      In any of the above-mentioned embodiments, the closing member  25  for sealing the gap between the side portions of the door panels may be provided on the door panel with a high movement speed without being limited to a case in which it is provided on the door panel with a low movement speed.  
      Further, the present invention can be applied to an elevator doorway door apparatus of multi-speed one-side opening type for opening and closing a doorway when six door panels move in the same direction at different speeds.  
      As has been described above, according to the present invention, the air tightness between the side portions of the door panels during door closing is well maintained without degrading the movement performance of the door panels, making it possible to enhance the noise shutout property and the smoke shutout property.  
      While the description above refers to particular embodiments of the present invention, it will be understood that many modifications may be made without departing from the spirit thereof. The accompanying claims are intended to cover such modifications as would fall within the true scope and spirit of the present invention. The presently disclosed embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.